Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1 | //===--- CGExprScalar.cpp - Emit LLVM Code for Scalar Exprs ---------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 0bc735f | 2007-12-29 19:59:25 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This contains code to emit Expr nodes with scalar LLVM types as LLVM code. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "CodeGenFunction.h" |
John McCall | 4c40d98 | 2010-08-31 07:33:07 +0000 | [diff] [blame] | 15 | #include "CGCXXABI.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 16 | #include "CGDebugInfo.h" |
Fariborz Jahanian | f7bcc7e | 2009-10-10 20:07:56 +0000 | [diff] [blame] | 17 | #include "CGObjCRuntime.h" |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 18 | #include "CodeGenModule.h" |
Daniel Dunbar | de7fb84 | 2008-08-11 05:00:27 +0000 | [diff] [blame] | 19 | #include "clang/AST/ASTContext.h" |
Daniel Dunbar | 98c5ead | 2008-08-12 05:08:18 +0000 | [diff] [blame] | 20 | #include "clang/AST/DeclObjC.h" |
Anders Carlsson | 19cc4ab | 2009-07-18 19:43:29 +0000 | [diff] [blame] | 21 | #include "clang/AST/RecordLayout.h" |
Daniel Dunbar | de7fb84 | 2008-08-11 05:00:27 +0000 | [diff] [blame] | 22 | #include "clang/AST/StmtVisitor.h" |
Chris Lattner | 25ddea7 | 2008-04-20 00:50:39 +0000 | [diff] [blame] | 23 | #include "clang/Basic/TargetInfo.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 24 | #include "clang/Frontend/CodeGenOptions.h" |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 25 | #include "llvm/IR/CFG.h" |
Chandler Carruth | 3b844ba | 2013-01-02 11:45:17 +0000 | [diff] [blame] | 26 | #include "llvm/IR/Constants.h" |
| 27 | #include "llvm/IR/DataLayout.h" |
| 28 | #include "llvm/IR/Function.h" |
| 29 | #include "llvm/IR/GlobalVariable.h" |
| 30 | #include "llvm/IR/Intrinsics.h" |
| 31 | #include "llvm/IR/Module.h" |
Chris Lattner | c89bf69 | 2008-01-03 07:05:49 +0000 | [diff] [blame] | 32 | #include <cstdarg> |
Ted Kremenek | 6aad91a | 2007-12-10 23:44:32 +0000 | [diff] [blame] | 33 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 34 | using namespace clang; |
| 35 | using namespace CodeGen; |
| 36 | using llvm::Value; |
| 37 | |
| 38 | //===----------------------------------------------------------------------===// |
| 39 | // Scalar Expression Emitter |
| 40 | //===----------------------------------------------------------------------===// |
| 41 | |
Benjamin Kramer | 79ba2a6 | 2010-10-22 16:48:22 +0000 | [diff] [blame] | 42 | namespace { |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 43 | struct BinOpInfo { |
| 44 | Value *LHS; |
| 45 | Value *RHS; |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 46 | QualType Ty; // Computation Type. |
Chris Lattner | 9a20723 | 2010-06-26 21:48:21 +0000 | [diff] [blame] | 47 | BinaryOperator::Opcode Opcode; // Opcode of BinOp to perform |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 48 | bool FPContractable; |
Chris Lattner | 9a20723 | 2010-06-26 21:48:21 +0000 | [diff] [blame] | 49 | const Expr *E; // Entire expr, for error unsupported. May not be binop. |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 50 | }; |
| 51 | |
John McCall | 404cd16 | 2010-11-13 01:35:44 +0000 | [diff] [blame] | 52 | static bool MustVisitNullValue(const Expr *E) { |
| 53 | // If a null pointer expression's type is the C++0x nullptr_t, then |
| 54 | // it's not necessarily a simple constant and it must be evaluated |
| 55 | // for its potential side effects. |
| 56 | return E->getType()->isNullPtrType(); |
| 57 | } |
| 58 | |
Benjamin Kramer | 85b4521 | 2009-11-28 19:45:26 +0000 | [diff] [blame] | 59 | class ScalarExprEmitter |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 60 | : public StmtVisitor<ScalarExprEmitter, Value*> { |
| 61 | CodeGenFunction &CGF; |
Daniel Dunbar | 45d196b | 2008-11-01 01:53:16 +0000 | [diff] [blame] | 62 | CGBuilderTy &Builder; |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 63 | bool IgnoreResultAssign; |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 64 | llvm::LLVMContext &VMContext; |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 65 | public: |
| 66 | |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 67 | ScalarExprEmitter(CodeGenFunction &cgf, bool ira=false) |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 68 | : CGF(cgf), Builder(CGF.Builder), IgnoreResultAssign(ira), |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 69 | VMContext(cgf.getLLVMContext()) { |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 70 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 71 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 72 | //===--------------------------------------------------------------------===// |
| 73 | // Utilities |
| 74 | //===--------------------------------------------------------------------===// |
| 75 | |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 76 | bool TestAndClearIgnoreResultAssign() { |
Chris Lattner | 9c10fcf | 2009-07-08 01:08:03 +0000 | [diff] [blame] | 77 | bool I = IgnoreResultAssign; |
| 78 | IgnoreResultAssign = false; |
| 79 | return I; |
| 80 | } |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 81 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 82 | llvm::Type *ConvertType(QualType T) { return CGF.ConvertType(T); } |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 83 | LValue EmitLValue(const Expr *E) { return CGF.EmitLValue(E); } |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 84 | LValue EmitCheckedLValue(const Expr *E, CodeGenFunction::TypeCheckKind TCK) { |
| 85 | return CGF.EmitCheckedLValue(E, TCK); |
Richard Smith | 2c9f87c | 2012-08-24 00:54:33 +0000 | [diff] [blame] | 86 | } |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 87 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 88 | void EmitBinOpCheck(ArrayRef<std::pair<Value *, SanitizerKind>> Checks, |
| 89 | const BinOpInfo &Info); |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 90 | |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 91 | Value *EmitLoadOfLValue(LValue LV, SourceLocation Loc) { |
| 92 | return CGF.EmitLoadOfLValue(LV, Loc).getScalarVal(); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 93 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 94 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 95 | void EmitLValueAlignmentAssumption(const Expr *E, Value *V) { |
| 96 | const AlignValueAttr *AVAttr = nullptr; |
| 97 | if (const auto *DRE = dyn_cast<DeclRefExpr>(E)) { |
| 98 | const ValueDecl *VD = DRE->getDecl(); |
| 99 | |
| 100 | if (VD->getType()->isReferenceType()) { |
| 101 | if (const auto *TTy = |
| 102 | dyn_cast<TypedefType>(VD->getType().getNonReferenceType())) |
| 103 | AVAttr = TTy->getDecl()->getAttr<AlignValueAttr>(); |
| 104 | } else { |
| 105 | // Assumptions for function parameters are emitted at the start of the |
| 106 | // function, so there is no need to repeat that here. |
| 107 | if (isa<ParmVarDecl>(VD)) |
| 108 | return; |
| 109 | |
| 110 | AVAttr = VD->getAttr<AlignValueAttr>(); |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | if (!AVAttr) |
| 115 | if (const auto *TTy = |
| 116 | dyn_cast<TypedefType>(E->getType())) |
| 117 | AVAttr = TTy->getDecl()->getAttr<AlignValueAttr>(); |
| 118 | |
| 119 | if (!AVAttr) |
| 120 | return; |
| 121 | |
| 122 | Value *AlignmentValue = CGF.EmitScalarExpr(AVAttr->getAlignment()); |
| 123 | llvm::ConstantInt *AlignmentCI = cast<llvm::ConstantInt>(AlignmentValue); |
| 124 | CGF.EmitAlignmentAssumption(V, AlignmentCI->getZExtValue()); |
| 125 | } |
| 126 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 127 | /// EmitLoadOfLValue - Given an expression with complex type that represents a |
| 128 | /// value l-value, this method emits the address of the l-value, then loads |
| 129 | /// and returns the result. |
| 130 | Value *EmitLoadOfLValue(const Expr *E) { |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 131 | Value *V = EmitLoadOfLValue(EmitCheckedLValue(E, CodeGenFunction::TCK_Load), |
| 132 | E->getExprLoc()); |
| 133 | |
| 134 | EmitLValueAlignmentAssumption(E, V); |
| 135 | return V; |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 136 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 137 | |
Chris Lattner | 9abc84e | 2007-08-26 16:42:57 +0000 | [diff] [blame] | 138 | /// EmitConversionToBool - Convert the specified expression value to a |
Chris Lattner | 3420d0d | 2007-08-26 17:25:57 +0000 | [diff] [blame] | 139 | /// boolean (i1) truth value. This is equivalent to "Val != 0". |
Chris Lattner | 9abc84e | 2007-08-26 16:42:57 +0000 | [diff] [blame] | 140 | Value *EmitConversionToBool(Value *Src, QualType DstTy); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 141 | |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 142 | /// \brief Emit a check that a conversion to or from a floating-point type |
| 143 | /// does not overflow. |
| 144 | void EmitFloatConversionCheck(Value *OrigSrc, QualType OrigSrcType, |
| 145 | Value *Src, QualType SrcType, |
| 146 | QualType DstType, llvm::Type *DstTy); |
| 147 | |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 148 | /// EmitScalarConversion - Emit a conversion from the specified type to the |
| 149 | /// specified destination type, both of which are LLVM scalar types. |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 150 | Value *EmitScalarConversion(Value *Src, QualType SrcTy, QualType DstTy); |
| 151 | |
| 152 | /// EmitComplexToScalarConversion - Emit a conversion from the specified |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 153 | /// complex type to the specified destination type, where the destination type |
| 154 | /// is an LLVM scalar type. |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 155 | Value *EmitComplexToScalarConversion(CodeGenFunction::ComplexPairTy Src, |
| 156 | QualType SrcTy, QualType DstTy); |
Mike Stump | df6b68c | 2009-02-12 18:29:15 +0000 | [diff] [blame] | 157 | |
Anders Carlsson | a40a9f3 | 2010-05-22 17:45:10 +0000 | [diff] [blame] | 158 | /// EmitNullValue - Emit a value that corresponds to null for the given type. |
| 159 | Value *EmitNullValue(QualType Ty); |
| 160 | |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 161 | /// EmitFloatToBoolConversion - Perform an FP to boolean conversion. |
| 162 | Value *EmitFloatToBoolConversion(Value *V) { |
| 163 | // Compare against 0.0 for fp scalars. |
| 164 | llvm::Value *Zero = llvm::Constant::getNullValue(V->getType()); |
| 165 | return Builder.CreateFCmpUNE(V, Zero, "tobool"); |
| 166 | } |
| 167 | |
| 168 | /// EmitPointerToBoolConversion - Perform a pointer to boolean conversion. |
| 169 | Value *EmitPointerToBoolConversion(Value *V) { |
| 170 | Value *Zero = llvm::ConstantPointerNull::get( |
| 171 | cast<llvm::PointerType>(V->getType())); |
| 172 | return Builder.CreateICmpNE(V, Zero, "tobool"); |
| 173 | } |
| 174 | |
| 175 | Value *EmitIntToBoolConversion(Value *V) { |
| 176 | // Because of the type rules of C, we often end up computing a |
| 177 | // logical value, then zero extending it to int, then wanting it |
| 178 | // as a logical value again. Optimize this common case. |
| 179 | if (llvm::ZExtInst *ZI = dyn_cast<llvm::ZExtInst>(V)) { |
| 180 | if (ZI->getOperand(0)->getType() == Builder.getInt1Ty()) { |
| 181 | Value *Result = ZI->getOperand(0); |
| 182 | // If there aren't any more uses, zap the instruction to save space. |
| 183 | // Note that there can be more uses, for example if this |
| 184 | // is the result of an assignment. |
| 185 | if (ZI->use_empty()) |
| 186 | ZI->eraseFromParent(); |
| 187 | return Result; |
| 188 | } |
| 189 | } |
| 190 | |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 191 | return Builder.CreateIsNotNull(V, "tobool"); |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 192 | } |
| 193 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 194 | //===--------------------------------------------------------------------===// |
| 195 | // Visitor Methods |
| 196 | //===--------------------------------------------------------------------===// |
| 197 | |
Fariborz Jahanian | af9b968 | 2010-09-17 15:51:28 +0000 | [diff] [blame] | 198 | Value *Visit(Expr *E) { |
Stephen Hines | 0e2c34f | 2015-03-23 12:09:02 -0700 | [diff] [blame^] | 199 | ApplyDebugLocation DL(CGF, E); |
Fariborz Jahanian | af9b968 | 2010-09-17 15:51:28 +0000 | [diff] [blame] | 200 | return StmtVisitor<ScalarExprEmitter, Value*>::Visit(E); |
| 201 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 202 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 203 | Value *VisitStmt(Stmt *S) { |
Ted Kremenek | 7a9d49f | 2007-12-11 21:27:55 +0000 | [diff] [blame] | 204 | S->dump(CGF.getContext().getSourceManager()); |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 205 | llvm_unreachable("Stmt can't have complex result type!"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 206 | } |
| 207 | Value *VisitExpr(Expr *S); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 208 | |
Fariborz Jahanian | af9b968 | 2010-09-17 15:51:28 +0000 | [diff] [blame] | 209 | Value *VisitParenExpr(ParenExpr *PE) { |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 210 | return Visit(PE->getSubExpr()); |
Fariborz Jahanian | af9b968 | 2010-09-17 15:51:28 +0000 | [diff] [blame] | 211 | } |
John McCall | 91a5755 | 2011-07-15 05:09:51 +0000 | [diff] [blame] | 212 | Value *VisitSubstNonTypeTemplateParmExpr(SubstNonTypeTemplateParmExpr *E) { |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 213 | return Visit(E->getReplacement()); |
John McCall | 91a5755 | 2011-07-15 05:09:51 +0000 | [diff] [blame] | 214 | } |
Peter Collingbourne | f111d93 | 2011-04-15 00:35:48 +0000 | [diff] [blame] | 215 | Value *VisitGenericSelectionExpr(GenericSelectionExpr *GE) { |
| 216 | return Visit(GE->getResultExpr()); |
| 217 | } |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 218 | |
| 219 | // Leaves. |
| 220 | Value *VisitIntegerLiteral(const IntegerLiteral *E) { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 221 | return Builder.getInt(E->getValue()); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 222 | } |
| 223 | Value *VisitFloatingLiteral(const FloatingLiteral *E) { |
Owen Anderson | bc0a222 | 2009-07-27 21:00:51 +0000 | [diff] [blame] | 224 | return llvm::ConstantFP::get(VMContext, E->getValue()); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 225 | } |
| 226 | Value *VisitCharacterLiteral(const CharacterLiteral *E) { |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 227 | return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue()); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 228 | } |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 229 | Value *VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *E) { |
| 230 | return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue()); |
| 231 | } |
Nate Begeman | e7579b5 | 2007-11-15 05:40:03 +0000 | [diff] [blame] | 232 | Value *VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 233 | return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue()); |
Nate Begeman | e7579b5 | 2007-11-15 05:40:03 +0000 | [diff] [blame] | 234 | } |
Douglas Gregor | ed8abf1 | 2010-07-08 06:14:04 +0000 | [diff] [blame] | 235 | Value *VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *E) { |
Anders Carlsson | a40a9f3 | 2010-05-22 17:45:10 +0000 | [diff] [blame] | 236 | return EmitNullValue(E->getType()); |
Argyrios Kyrtzidis | 7267f78 | 2008-08-23 19:35:47 +0000 | [diff] [blame] | 237 | } |
Anders Carlsson | 3f70456 | 2008-12-21 22:39:40 +0000 | [diff] [blame] | 238 | Value *VisitGNUNullExpr(const GNUNullExpr *E) { |
Anders Carlsson | a40a9f3 | 2010-05-22 17:45:10 +0000 | [diff] [blame] | 239 | return EmitNullValue(E->getType()); |
Anders Carlsson | 3f70456 | 2008-12-21 22:39:40 +0000 | [diff] [blame] | 240 | } |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 241 | Value *VisitOffsetOfExpr(OffsetOfExpr *E); |
Peter Collingbourne | f4e3cfb | 2011-03-11 19:24:49 +0000 | [diff] [blame] | 242 | Value *VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *E); |
Daniel Dunbar | 0ffb125 | 2008-08-04 16:51:22 +0000 | [diff] [blame] | 243 | Value *VisitAddrLabelExpr(const AddrLabelExpr *E) { |
Chris Lattner | d9becd1 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 244 | llvm::Value *V = CGF.GetAddrOfLabel(E->getLabel()); |
| 245 | return Builder.CreateBitCast(V, ConvertType(E->getType())); |
Daniel Dunbar | 0ffb125 | 2008-08-04 16:51:22 +0000 | [diff] [blame] | 246 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 247 | |
Douglas Gregor | 9370c8f | 2011-01-12 22:11:34 +0000 | [diff] [blame] | 248 | Value *VisitSizeOfPackExpr(SizeOfPackExpr *E) { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 249 | return llvm::ConstantInt::get(ConvertType(E->getType()),E->getPackLength()); |
Douglas Gregor | 9370c8f | 2011-01-12 22:11:34 +0000 | [diff] [blame] | 250 | } |
John McCall | e996ffd | 2011-02-16 08:02:54 +0000 | [diff] [blame] | 251 | |
John McCall | 4b9c2d2 | 2011-11-06 09:01:30 +0000 | [diff] [blame] | 252 | Value *VisitPseudoObjectExpr(PseudoObjectExpr *E) { |
| 253 | return CGF.EmitPseudoObjectRValue(E).getScalarVal(); |
| 254 | } |
| 255 | |
John McCall | e996ffd | 2011-02-16 08:02:54 +0000 | [diff] [blame] | 256 | Value *VisitOpaqueValueExpr(OpaqueValueExpr *E) { |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 257 | if (E->isGLValue()) |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 258 | return EmitLoadOfLValue(CGF.getOpaqueLValueMapping(E), E->getExprLoc()); |
John McCall | e996ffd | 2011-02-16 08:02:54 +0000 | [diff] [blame] | 259 | |
| 260 | // Otherwise, assume the mapping is the scalar directly. |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 261 | return CGF.getOpaqueRValueMapping(E).getScalarVal(); |
John McCall | e996ffd | 2011-02-16 08:02:54 +0000 | [diff] [blame] | 262 | } |
John McCall | dd2ecee | 2012-03-10 03:05:10 +0000 | [diff] [blame] | 263 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 264 | // l-values. |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 265 | Value *VisitDeclRefExpr(DeclRefExpr *E) { |
| 266 | if (CodeGenFunction::ConstantEmission result = CGF.tryEmitAsConstant(E)) { |
John McCall | dd2ecee | 2012-03-10 03:05:10 +0000 | [diff] [blame] | 267 | if (result.isReference()) |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 268 | return EmitLoadOfLValue(result.getReferenceLValue(CGF, E), |
| 269 | E->getExprLoc()); |
John McCall | dd2ecee | 2012-03-10 03:05:10 +0000 | [diff] [blame] | 270 | return result.getValue(); |
Richard Smith | a3ca41f | 2012-03-02 23:27:11 +0000 | [diff] [blame] | 271 | } |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 272 | return EmitLoadOfLValue(E); |
John McCall | dd2ecee | 2012-03-10 03:05:10 +0000 | [diff] [blame] | 273 | } |
| 274 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 275 | Value *VisitObjCSelectorExpr(ObjCSelectorExpr *E) { |
| 276 | return CGF.EmitObjCSelectorExpr(E); |
Daniel Dunbar | 9c3fc70 | 2008-08-27 06:57:25 +0000 | [diff] [blame] | 277 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 278 | Value *VisitObjCProtocolExpr(ObjCProtocolExpr *E) { |
| 279 | return CGF.EmitObjCProtocolExpr(E); |
Daniel Dunbar | 9c3fc70 | 2008-08-27 06:57:25 +0000 | [diff] [blame] | 280 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 281 | Value *VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { |
Daniel Dunbar | 9c3fc70 | 2008-08-27 06:57:25 +0000 | [diff] [blame] | 282 | return EmitLoadOfLValue(E); |
| 283 | } |
Daniel Dunbar | 9c3fc70 | 2008-08-27 06:57:25 +0000 | [diff] [blame] | 284 | Value *VisitObjCMessageExpr(ObjCMessageExpr *E) { |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 285 | if (E->getMethodDecl() && |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 286 | E->getMethodDecl()->getReturnType()->isReferenceType()) |
Fariborz Jahanian | 180ff3a | 2011-03-02 20:09:49 +0000 | [diff] [blame] | 287 | return EmitLoadOfLValue(E); |
Daniel Dunbar | 9c3fc70 | 2008-08-27 06:57:25 +0000 | [diff] [blame] | 288 | return CGF.EmitObjCMessageExpr(E).getScalarVal(); |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 289 | } |
| 290 | |
Fariborz Jahanian | 83dc325 | 2009-12-09 19:05:56 +0000 | [diff] [blame] | 291 | Value *VisitObjCIsaExpr(ObjCIsaExpr *E) { |
Fariborz Jahanian | 820bca4 | 2009-12-09 23:35:29 +0000 | [diff] [blame] | 292 | LValue LV = CGF.EmitObjCIsaExpr(E); |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 293 | Value *V = CGF.EmitLoadOfLValue(LV, E->getExprLoc()).getScalarVal(); |
Fariborz Jahanian | 83dc325 | 2009-12-09 19:05:56 +0000 | [diff] [blame] | 294 | return V; |
| 295 | } |
| 296 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 297 | Value *VisitArraySubscriptExpr(ArraySubscriptExpr *E); |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 298 | Value *VisitShuffleVectorExpr(ShuffleVectorExpr *E); |
Hal Finkel | 414a1bd | 2013-09-18 03:29:45 +0000 | [diff] [blame] | 299 | Value *VisitConvertVectorExpr(ConvertVectorExpr *E); |
Eli Friedman | 2866527 | 2009-11-26 03:22:21 +0000 | [diff] [blame] | 300 | Value *VisitMemberExpr(MemberExpr *E); |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 301 | Value *VisitExtVectorElementExpr(Expr *E) { return EmitLoadOfLValue(E); } |
Chris Lattner | be20bb5 | 2008-10-26 23:53:12 +0000 | [diff] [blame] | 302 | Value *VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { |
| 303 | return EmitLoadOfLValue(E); |
| 304 | } |
Devang Patel | 35634f5 | 2007-10-24 17:18:43 +0000 | [diff] [blame] | 305 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 306 | Value *VisitInitListExpr(InitListExpr *E); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 307 | |
Douglas Gregor | 3498bdb | 2009-01-29 17:44:32 +0000 | [diff] [blame] | 308 | Value *VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) { |
Richard Smith | 0dbe2fb | 2012-12-21 03:17:28 +0000 | [diff] [blame] | 309 | return EmitNullValue(E->getType()); |
Douglas Gregor | 3498bdb | 2009-01-29 17:44:32 +0000 | [diff] [blame] | 310 | } |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 311 | Value *VisitExplicitCastExpr(ExplicitCastExpr *E) { |
Fariborz Jahanian | 745da3a | 2010-09-24 17:30:16 +0000 | [diff] [blame] | 312 | if (E->getType()->isVariablyModifiedType()) |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 313 | CGF.EmitVariablyModifiedType(E->getType()); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 314 | |
| 315 | if (CGDebugInfo *DI = CGF.getDebugInfo()) |
| 316 | DI->EmitExplicitCastType(E->getType()); |
| 317 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 318 | return VisitCastExpr(E); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 319 | } |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 320 | Value *VisitCastExpr(CastExpr *E); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 321 | |
| 322 | Value *VisitCallExpr(const CallExpr *E) { |
Stephen Hines | 0e2c34f | 2015-03-23 12:09:02 -0700 | [diff] [blame^] | 323 | if (E->getCallReturnType(CGF.getContext())->isReferenceType()) |
Anders Carlsson | e9f2f45 | 2009-05-27 03:37:57 +0000 | [diff] [blame] | 324 | return EmitLoadOfLValue(E); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 325 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 326 | Value *V = CGF.EmitCallExpr(E).getScalarVal(); |
| 327 | |
| 328 | EmitLValueAlignmentAssumption(E, V); |
| 329 | return V; |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 330 | } |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 331 | |
Chris Lattner | 3379320 | 2007-08-31 22:09:40 +0000 | [diff] [blame] | 332 | Value *VisitStmtExpr(const StmtExpr *E); |
Mike Stump | 4e7a1f7 | 2009-02-21 20:00:35 +0000 | [diff] [blame] | 333 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 334 | // Unary Operators. |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 335 | Value *VisitUnaryPostDec(const UnaryOperator *E) { |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 336 | LValue LV = EmitLValue(E->getSubExpr()); |
| 337 | return EmitScalarPrePostIncDec(E, LV, false, false); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 338 | } |
| 339 | Value *VisitUnaryPostInc(const UnaryOperator *E) { |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 340 | LValue LV = EmitLValue(E->getSubExpr()); |
| 341 | return EmitScalarPrePostIncDec(E, LV, true, false); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 342 | } |
| 343 | Value *VisitUnaryPreDec(const UnaryOperator *E) { |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 344 | LValue LV = EmitLValue(E->getSubExpr()); |
| 345 | return EmitScalarPrePostIncDec(E, LV, false, true); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 346 | } |
| 347 | Value *VisitUnaryPreInc(const UnaryOperator *E) { |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 348 | LValue LV = EmitLValue(E->getSubExpr()); |
| 349 | return EmitScalarPrePostIncDec(E, LV, true, true); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 350 | } |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 351 | |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 352 | llvm::Value *EmitAddConsiderOverflowBehavior(const UnaryOperator *E, |
| 353 | llvm::Value *InVal, |
| 354 | llvm::Value *NextVal, |
| 355 | bool IsInc); |
| 356 | |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 357 | llvm::Value *EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV, |
| 358 | bool isInc, bool isPre); |
| 359 | |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 360 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 361 | Value *VisitUnaryAddrOf(const UnaryOperator *E) { |
John McCall | 5808ce4 | 2011-02-03 08:15:49 +0000 | [diff] [blame] | 362 | if (isa<MemberPointerType>(E->getType())) // never sugared |
| 363 | return CGF.CGM.getMemberPointerConstant(E); |
| 364 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 365 | return EmitLValue(E->getSubExpr()).getAddress(); |
| 366 | } |
John McCall | fd56900 | 2010-12-04 12:43:24 +0000 | [diff] [blame] | 367 | Value *VisitUnaryDeref(const UnaryOperator *E) { |
| 368 | if (E->getType()->isVoidType()) |
| 369 | return Visit(E->getSubExpr()); // the actual value should be unused |
| 370 | return EmitLoadOfLValue(E); |
| 371 | } |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 372 | Value *VisitUnaryPlus(const UnaryOperator *E) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 373 | // This differs from gcc, though, most likely due to a bug in gcc. |
| 374 | TestAndClearIgnoreResultAssign(); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 375 | return Visit(E->getSubExpr()); |
| 376 | } |
| 377 | Value *VisitUnaryMinus (const UnaryOperator *E); |
| 378 | Value *VisitUnaryNot (const UnaryOperator *E); |
| 379 | Value *VisitUnaryLNot (const UnaryOperator *E); |
Chris Lattner | 46f93d0 | 2007-08-24 21:20:17 +0000 | [diff] [blame] | 380 | Value *VisitUnaryReal (const UnaryOperator *E); |
| 381 | Value *VisitUnaryImag (const UnaryOperator *E); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 382 | Value *VisitUnaryExtension(const UnaryOperator *E) { |
| 383 | return Visit(E->getSubExpr()); |
| 384 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 385 | |
Anders Carlsson | 5f4307b | 2009-04-14 16:58:56 +0000 | [diff] [blame] | 386 | // C++ |
Douglas Gregor | 3f86ce1 | 2011-08-09 00:37:14 +0000 | [diff] [blame] | 387 | Value *VisitMaterializeTemporaryExpr(const MaterializeTemporaryExpr *E) { |
Eli Friedman | ec24b0e | 2011-08-14 04:50:34 +0000 | [diff] [blame] | 388 | return EmitLoadOfLValue(E); |
Douglas Gregor | 3f86ce1 | 2011-08-09 00:37:14 +0000 | [diff] [blame] | 389 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 390 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 391 | Value *VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) { |
| 392 | return Visit(DAE->getExpr()); |
| 393 | } |
Richard Smith | c3bf52c | 2013-04-20 22:23:05 +0000 | [diff] [blame] | 394 | Value *VisitCXXDefaultInitExpr(CXXDefaultInitExpr *DIE) { |
| 395 | CodeGenFunction::CXXDefaultInitExprScope Scope(CGF); |
| 396 | return Visit(DIE->getExpr()); |
| 397 | } |
Anders Carlsson | 5f4307b | 2009-04-14 16:58:56 +0000 | [diff] [blame] | 398 | Value *VisitCXXThisExpr(CXXThisExpr *TE) { |
| 399 | return CGF.LoadCXXThis(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 400 | } |
| 401 | |
John McCall | 4765fa0 | 2010-12-06 08:20:24 +0000 | [diff] [blame] | 402 | Value *VisitExprWithCleanups(ExprWithCleanups *E) { |
John McCall | 1a343eb | 2011-11-10 08:15:53 +0000 | [diff] [blame] | 403 | CGF.enterFullExpression(E); |
| 404 | CodeGenFunction::RunCleanupsScope Scope(CGF); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 405 | return Visit(E->getSubExpr()); |
Anders Carlsson | 7f6ad15 | 2009-05-19 04:48:36 +0000 | [diff] [blame] | 406 | } |
Anders Carlsson | a00703d | 2009-05-31 01:40:14 +0000 | [diff] [blame] | 407 | Value *VisitCXXNewExpr(const CXXNewExpr *E) { |
| 408 | return CGF.EmitCXXNewExpr(E); |
| 409 | } |
Anders Carlsson | 60e282c | 2009-08-16 21:13:42 +0000 | [diff] [blame] | 410 | Value *VisitCXXDeleteExpr(const CXXDeleteExpr *E) { |
| 411 | CGF.EmitCXXDeleteExpr(E); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 412 | return nullptr; |
Anders Carlsson | 60e282c | 2009-08-16 21:13:42 +0000 | [diff] [blame] | 413 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 414 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 415 | Value *VisitTypeTraitExpr(const TypeTraitExpr *E) { |
Francois Pichet | f187237 | 2010-12-08 22:35:30 +0000 | [diff] [blame] | 416 | return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue()); |
Francois Pichet | 6ad6f28 | 2010-12-07 00:08:36 +0000 | [diff] [blame] | 417 | } |
| 418 | |
John Wiegley | 21ff2e5 | 2011-04-28 00:16:57 +0000 | [diff] [blame] | 419 | Value *VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *E) { |
| 420 | return llvm::ConstantInt::get(Builder.getInt32Ty(), E->getValue()); |
| 421 | } |
| 422 | |
John Wiegley | 5526220 | 2011-04-25 06:54:41 +0000 | [diff] [blame] | 423 | Value *VisitExpressionTraitExpr(const ExpressionTraitExpr *E) { |
| 424 | return llvm::ConstantInt::get(Builder.getInt1Ty(), E->getValue()); |
| 425 | } |
| 426 | |
Douglas Gregor | a71d819 | 2009-09-04 17:36:40 +0000 | [diff] [blame] | 427 | Value *VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *E) { |
| 428 | // C++ [expr.pseudo]p1: |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 429 | // The result shall only be used as the operand for the function call |
Douglas Gregor | a71d819 | 2009-09-04 17:36:40 +0000 | [diff] [blame] | 430 | // operator (), and the result of such a call has type void. The only |
| 431 | // effect is the evaluation of the postfix-expression before the dot or |
| 432 | // arrow. |
| 433 | CGF.EmitScalarExpr(E->getBase()); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 434 | return nullptr; |
Douglas Gregor | a71d819 | 2009-09-04 17:36:40 +0000 | [diff] [blame] | 435 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 436 | |
Anders Carlsson | c1eb14a | 2009-09-15 04:39:46 +0000 | [diff] [blame] | 437 | Value *VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *E) { |
Anders Carlsson | a40a9f3 | 2010-05-22 17:45:10 +0000 | [diff] [blame] | 438 | return EmitNullValue(E->getType()); |
Anders Carlsson | c1eb14a | 2009-09-15 04:39:46 +0000 | [diff] [blame] | 439 | } |
Anders Carlsson | 756b5c4 | 2009-10-30 01:42:31 +0000 | [diff] [blame] | 440 | |
| 441 | Value *VisitCXXThrowExpr(const CXXThrowExpr *E) { |
| 442 | CGF.EmitCXXThrowExpr(E); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 443 | return nullptr; |
Anders Carlsson | 756b5c4 | 2009-10-30 01:42:31 +0000 | [diff] [blame] | 444 | } |
| 445 | |
Sebastian Redl | 98294de | 2010-09-10 21:04:00 +0000 | [diff] [blame] | 446 | Value *VisitCXXNoexceptExpr(const CXXNoexceptExpr *E) { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 447 | return Builder.getInt1(E->getValue()); |
Sebastian Redl | 98294de | 2010-09-10 21:04:00 +0000 | [diff] [blame] | 448 | } |
| 449 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 450 | // Binary Operators. |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 451 | Value *EmitMul(const BinOpInfo &Ops) { |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 452 | if (Ops.Ty->isSignedIntegerOrEnumerationType()) { |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 453 | switch (CGF.getLangOpts().getSignedOverflowBehavior()) { |
Chris Lattner | a4d7145 | 2010-06-26 21:25:03 +0000 | [diff] [blame] | 454 | case LangOptions::SOB_Defined: |
| 455 | return Builder.CreateMul(Ops.LHS, Ops.RHS, "mul"); |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 456 | case LangOptions::SOB_Undefined: |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 457 | if (!CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 458 | return Builder.CreateNSWMul(Ops.LHS, Ops.RHS, "mul"); |
| 459 | // Fall through. |
Chris Lattner | a4d7145 | 2010-06-26 21:25:03 +0000 | [diff] [blame] | 460 | case LangOptions::SOB_Trapping: |
| 461 | return EmitOverflowCheckedBinOp(Ops); |
| 462 | } |
| 463 | } |
Richard Smith | d6396a6 | 2012-11-05 22:21:05 +0000 | [diff] [blame] | 464 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 465 | if (Ops.Ty->isUnsignedIntegerType() && |
| 466 | CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 467 | return EmitOverflowCheckedBinOp(Ops); |
| 468 | |
Duncan Sands | f177d9d | 2010-02-15 16:14:01 +0000 | [diff] [blame] | 469 | if (Ops.LHS->getType()->isFPOrFPVectorTy()) |
Chris Lattner | 87415d2 | 2009-06-17 06:36:24 +0000 | [diff] [blame] | 470 | return Builder.CreateFMul(Ops.LHS, Ops.RHS, "mul"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 471 | return Builder.CreateMul(Ops.LHS, Ops.RHS, "mul"); |
| 472 | } |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 473 | /// Create a binary op that checks for overflow. |
| 474 | /// Currently only supports +, - and *. |
| 475 | Value *EmitOverflowCheckedBinOp(const BinOpInfo &Ops); |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 476 | |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 477 | // Check for undefined division and modulus behaviors. |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 478 | void EmitUndefinedBehaviorIntegerDivAndRemCheck(const BinOpInfo &Ops, |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 479 | llvm::Value *Zero,bool isDiv); |
David Tweed | 7a83421 | 2013-01-07 16:43:27 +0000 | [diff] [blame] | 480 | // Common helper for getting how wide LHS of shift is. |
| 481 | static Value *GetWidthMinusOneValue(Value* LHS,Value* RHS); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 482 | Value *EmitDiv(const BinOpInfo &Ops); |
| 483 | Value *EmitRem(const BinOpInfo &Ops); |
| 484 | Value *EmitAdd(const BinOpInfo &Ops); |
| 485 | Value *EmitSub(const BinOpInfo &Ops); |
| 486 | Value *EmitShl(const BinOpInfo &Ops); |
| 487 | Value *EmitShr(const BinOpInfo &Ops); |
| 488 | Value *EmitAnd(const BinOpInfo &Ops) { |
| 489 | return Builder.CreateAnd(Ops.LHS, Ops.RHS, "and"); |
| 490 | } |
| 491 | Value *EmitXor(const BinOpInfo &Ops) { |
| 492 | return Builder.CreateXor(Ops.LHS, Ops.RHS, "xor"); |
| 493 | } |
| 494 | Value *EmitOr (const BinOpInfo &Ops) { |
| 495 | return Builder.CreateOr(Ops.LHS, Ops.RHS, "or"); |
| 496 | } |
| 497 | |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 498 | BinOpInfo EmitBinOps(const BinaryOperator *E); |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 499 | LValue EmitCompoundAssignLValue(const CompoundAssignOperator *E, |
| 500 | Value *(ScalarExprEmitter::*F)(const BinOpInfo &), |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 501 | Value *&Result); |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 502 | |
Chris Lattner | 3ccf774 | 2007-08-26 21:41:21 +0000 | [diff] [blame] | 503 | Value *EmitCompoundAssign(const CompoundAssignOperator *E, |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 504 | Value *(ScalarExprEmitter::*F)(const BinOpInfo &)); |
| 505 | |
| 506 | // Binary operators and binary compound assignment operators. |
| 507 | #define HANDLEBINOP(OP) \ |
Chris Lattner | 3ccf774 | 2007-08-26 21:41:21 +0000 | [diff] [blame] | 508 | Value *VisitBin ## OP(const BinaryOperator *E) { \ |
| 509 | return Emit ## OP(EmitBinOps(E)); \ |
| 510 | } \ |
| 511 | Value *VisitBin ## OP ## Assign(const CompoundAssignOperator *E) { \ |
| 512 | return EmitCompoundAssign(E, &ScalarExprEmitter::Emit ## OP); \ |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 513 | } |
Daniel Dunbar | 7177dee | 2009-12-19 17:50:07 +0000 | [diff] [blame] | 514 | HANDLEBINOP(Mul) |
| 515 | HANDLEBINOP(Div) |
| 516 | HANDLEBINOP(Rem) |
| 517 | HANDLEBINOP(Add) |
| 518 | HANDLEBINOP(Sub) |
| 519 | HANDLEBINOP(Shl) |
| 520 | HANDLEBINOP(Shr) |
| 521 | HANDLEBINOP(And) |
| 522 | HANDLEBINOP(Xor) |
| 523 | HANDLEBINOP(Or) |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 524 | #undef HANDLEBINOP |
Daniel Dunbar | 8c6f57c | 2008-08-06 02:00:38 +0000 | [diff] [blame] | 525 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 526 | // Comparisons. |
| 527 | Value *EmitCompare(const BinaryOperator *E, unsigned UICmpOpc, |
| 528 | unsigned SICmpOpc, unsigned FCmpOpc); |
| 529 | #define VISITCOMP(CODE, UI, SI, FP) \ |
| 530 | Value *VisitBin##CODE(const BinaryOperator *E) { \ |
| 531 | return EmitCompare(E, llvm::ICmpInst::UI, llvm::ICmpInst::SI, \ |
| 532 | llvm::FCmpInst::FP); } |
Daniel Dunbar | 7177dee | 2009-12-19 17:50:07 +0000 | [diff] [blame] | 533 | VISITCOMP(LT, ICMP_ULT, ICMP_SLT, FCMP_OLT) |
| 534 | VISITCOMP(GT, ICMP_UGT, ICMP_SGT, FCMP_OGT) |
| 535 | VISITCOMP(LE, ICMP_ULE, ICMP_SLE, FCMP_OLE) |
| 536 | VISITCOMP(GE, ICMP_UGE, ICMP_SGE, FCMP_OGE) |
| 537 | VISITCOMP(EQ, ICMP_EQ , ICMP_EQ , FCMP_OEQ) |
| 538 | VISITCOMP(NE, ICMP_NE , ICMP_NE , FCMP_UNE) |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 539 | #undef VISITCOMP |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 540 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 541 | Value *VisitBinAssign (const BinaryOperator *E); |
| 542 | |
| 543 | Value *VisitBinLAnd (const BinaryOperator *E); |
| 544 | Value *VisitBinLOr (const BinaryOperator *E); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 545 | Value *VisitBinComma (const BinaryOperator *E); |
| 546 | |
Eli Friedman | 25b825d | 2009-11-18 09:41:26 +0000 | [diff] [blame] | 547 | Value *VisitBinPtrMemD(const Expr *E) { return EmitLoadOfLValue(E); } |
| 548 | Value *VisitBinPtrMemI(const Expr *E) { return EmitLoadOfLValue(E); } |
| 549 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 550 | // Other Operators. |
Mike Stump | df6b68c | 2009-02-12 18:29:15 +0000 | [diff] [blame] | 551 | Value *VisitBlockExpr(const BlockExpr *BE); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 552 | Value *VisitAbstractConditionalOperator(const AbstractConditionalOperator *); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 553 | Value *VisitChooseExpr(ChooseExpr *CE); |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 554 | Value *VisitVAArgExpr(VAArgExpr *VE); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 555 | Value *VisitObjCStringLiteral(const ObjCStringLiteral *E) { |
| 556 | return CGF.EmitObjCStringLiteral(E); |
| 557 | } |
Patrick Beard | eb382ec | 2012-04-19 00:25:12 +0000 | [diff] [blame] | 558 | Value *VisitObjCBoxedExpr(ObjCBoxedExpr *E) { |
| 559 | return CGF.EmitObjCBoxedExpr(E); |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 560 | } |
| 561 | Value *VisitObjCArrayLiteral(ObjCArrayLiteral *E) { |
| 562 | return CGF.EmitObjCArrayLiteral(E); |
| 563 | } |
| 564 | Value *VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) { |
| 565 | return CGF.EmitObjCDictionaryLiteral(E); |
| 566 | } |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 567 | Value *VisitAsTypeExpr(AsTypeExpr *CE); |
Eli Friedman | 276b061 | 2011-10-11 02:20:01 +0000 | [diff] [blame] | 568 | Value *VisitAtomicExpr(AtomicExpr *AE); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 569 | }; |
| 570 | } // end anonymous namespace. |
| 571 | |
| 572 | //===----------------------------------------------------------------------===// |
| 573 | // Utilities |
| 574 | //===----------------------------------------------------------------------===// |
| 575 | |
Chris Lattner | 9abc84e | 2007-08-26 16:42:57 +0000 | [diff] [blame] | 576 | /// EmitConversionToBool - Convert the specified expression value to a |
Chris Lattner | 3420d0d | 2007-08-26 17:25:57 +0000 | [diff] [blame] | 577 | /// boolean (i1) truth value. This is equivalent to "Val != 0". |
Chris Lattner | 9abc84e | 2007-08-26 16:42:57 +0000 | [diff] [blame] | 578 | Value *ScalarExprEmitter::EmitConversionToBool(Value *Src, QualType SrcType) { |
John McCall | 467b27b | 2009-10-22 20:10:53 +0000 | [diff] [blame] | 579 | assert(SrcType.isCanonical() && "EmitScalarConversion strips typedefs"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 580 | |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 581 | if (SrcType->isRealFloatingType()) |
| 582 | return EmitFloatToBoolConversion(Src); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 583 | |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 584 | if (const MemberPointerType *MPT = dyn_cast<MemberPointerType>(SrcType)) |
| 585 | return CGF.CGM.getCXXABI().EmitMemberPointerIsNotNull(CGF, Src, MPT); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 586 | |
Daniel Dunbar | d1d66bc | 2008-08-25 10:38:11 +0000 | [diff] [blame] | 587 | assert((SrcType->isIntegerType() || isa<llvm::PointerType>(Src->getType())) && |
Chris Lattner | 9abc84e | 2007-08-26 16:42:57 +0000 | [diff] [blame] | 588 | "Unknown scalar type to convert"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 589 | |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 590 | if (isa<llvm::IntegerType>(Src->getType())) |
| 591 | return EmitIntToBoolConversion(Src); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 592 | |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 593 | assert(isa<llvm::PointerType>(Src->getType())); |
| 594 | return EmitPointerToBoolConversion(Src); |
Chris Lattner | 9abc84e | 2007-08-26 16:42:57 +0000 | [diff] [blame] | 595 | } |
| 596 | |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 597 | void ScalarExprEmitter::EmitFloatConversionCheck(Value *OrigSrc, |
| 598 | QualType OrigSrcType, |
| 599 | Value *Src, QualType SrcType, |
| 600 | QualType DstType, |
| 601 | llvm::Type *DstTy) { |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 602 | CodeGenFunction::SanitizerScope SanScope(&CGF); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 603 | using llvm::APFloat; |
| 604 | using llvm::APSInt; |
| 605 | |
| 606 | llvm::Type *SrcTy = Src->getType(); |
| 607 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 608 | llvm::Value *Check = nullptr; |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 609 | if (llvm::IntegerType *IntTy = dyn_cast<llvm::IntegerType>(SrcTy)) { |
| 610 | // Integer to floating-point. This can fail for unsigned short -> __half |
| 611 | // or unsigned __int128 -> float. |
| 612 | assert(DstType->isFloatingType()); |
| 613 | bool SrcIsUnsigned = OrigSrcType->isUnsignedIntegerOrEnumerationType(); |
| 614 | |
| 615 | APFloat LargestFloat = |
| 616 | APFloat::getLargest(CGF.getContext().getFloatTypeSemantics(DstType)); |
| 617 | APSInt LargestInt(IntTy->getBitWidth(), SrcIsUnsigned); |
| 618 | |
| 619 | bool IsExact; |
| 620 | if (LargestFloat.convertToInteger(LargestInt, APFloat::rmTowardZero, |
| 621 | &IsExact) != APFloat::opOK) |
| 622 | // The range of representable values of this floating point type includes |
| 623 | // all values of this integer type. Don't need an overflow check. |
| 624 | return; |
| 625 | |
| 626 | llvm::Value *Max = llvm::ConstantInt::get(VMContext, LargestInt); |
| 627 | if (SrcIsUnsigned) |
| 628 | Check = Builder.CreateICmpULE(Src, Max); |
| 629 | else { |
| 630 | llvm::Value *Min = llvm::ConstantInt::get(VMContext, -LargestInt); |
| 631 | llvm::Value *GE = Builder.CreateICmpSGE(Src, Min); |
| 632 | llvm::Value *LE = Builder.CreateICmpSLE(Src, Max); |
| 633 | Check = Builder.CreateAnd(GE, LE); |
| 634 | } |
| 635 | } else { |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 636 | const llvm::fltSemantics &SrcSema = |
| 637 | CGF.getContext().getFloatTypeSemantics(OrigSrcType); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 638 | if (isa<llvm::IntegerType>(DstTy)) { |
Richard Smith | 5087645 | 2013-03-27 23:20:25 +0000 | [diff] [blame] | 639 | // Floating-point to integer. This has undefined behavior if the source is |
| 640 | // +-Inf, NaN, or doesn't fit into the destination type (after truncation |
| 641 | // to an integer). |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 642 | unsigned Width = CGF.getContext().getIntWidth(DstType); |
| 643 | bool Unsigned = DstType->isUnsignedIntegerOrEnumerationType(); |
| 644 | |
| 645 | APSInt Min = APSInt::getMinValue(Width, Unsigned); |
Richard Smith | 5087645 | 2013-03-27 23:20:25 +0000 | [diff] [blame] | 646 | APFloat MinSrc(SrcSema, APFloat::uninitialized); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 647 | if (MinSrc.convertFromAPInt(Min, !Unsigned, APFloat::rmTowardZero) & |
| 648 | APFloat::opOverflow) |
| 649 | // Don't need an overflow check for lower bound. Just check for |
| 650 | // -Inf/NaN. |
Richard Smith | aa62495 | 2013-03-19 00:01:12 +0000 | [diff] [blame] | 651 | MinSrc = APFloat::getInf(SrcSema, true); |
| 652 | else |
| 653 | // Find the largest value which is too small to represent (before |
| 654 | // truncation toward zero). |
| 655 | MinSrc.subtract(APFloat(SrcSema, 1), APFloat::rmTowardNegative); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 656 | |
| 657 | APSInt Max = APSInt::getMaxValue(Width, Unsigned); |
Richard Smith | 5087645 | 2013-03-27 23:20:25 +0000 | [diff] [blame] | 658 | APFloat MaxSrc(SrcSema, APFloat::uninitialized); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 659 | if (MaxSrc.convertFromAPInt(Max, !Unsigned, APFloat::rmTowardZero) & |
| 660 | APFloat::opOverflow) |
| 661 | // Don't need an overflow check for upper bound. Just check for |
| 662 | // +Inf/NaN. |
Richard Smith | aa62495 | 2013-03-19 00:01:12 +0000 | [diff] [blame] | 663 | MaxSrc = APFloat::getInf(SrcSema, false); |
| 664 | else |
| 665 | // Find the smallest value which is too large to represent (before |
| 666 | // truncation toward zero). |
| 667 | MaxSrc.add(APFloat(SrcSema, 1), APFloat::rmTowardPositive); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 668 | |
Richard Smith | 5087645 | 2013-03-27 23:20:25 +0000 | [diff] [blame] | 669 | // If we're converting from __half, convert the range to float to match |
| 670 | // the type of src. |
| 671 | if (OrigSrcType->isHalfType()) { |
| 672 | const llvm::fltSemantics &Sema = |
| 673 | CGF.getContext().getFloatTypeSemantics(SrcType); |
| 674 | bool IsInexact; |
| 675 | MinSrc.convert(Sema, APFloat::rmTowardZero, &IsInexact); |
| 676 | MaxSrc.convert(Sema, APFloat::rmTowardZero, &IsInexact); |
| 677 | } |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 678 | |
Richard Smith | aa62495 | 2013-03-19 00:01:12 +0000 | [diff] [blame] | 679 | llvm::Value *GE = |
| 680 | Builder.CreateFCmpOGT(Src, llvm::ConstantFP::get(VMContext, MinSrc)); |
| 681 | llvm::Value *LE = |
| 682 | Builder.CreateFCmpOLT(Src, llvm::ConstantFP::get(VMContext, MaxSrc)); |
| 683 | Check = Builder.CreateAnd(GE, LE); |
| 684 | } else { |
Richard Smith | 5087645 | 2013-03-27 23:20:25 +0000 | [diff] [blame] | 685 | // FIXME: Maybe split this sanitizer out from float-cast-overflow. |
| 686 | // |
| 687 | // Floating-point to floating-point. This has undefined behavior if the |
| 688 | // source is not in the range of representable values of the destination |
| 689 | // type. The C and C++ standards are spectacularly unclear here. We |
| 690 | // diagnose finite out-of-range conversions, but allow infinities and NaNs |
| 691 | // to convert to the corresponding value in the smaller type. |
| 692 | // |
| 693 | // C11 Annex F gives all such conversions defined behavior for IEC 60559 |
| 694 | // conforming implementations. Unfortunately, LLVM's fptrunc instruction |
| 695 | // does not. |
| 696 | |
| 697 | // Converting from a lower rank to a higher rank can never have |
| 698 | // undefined behavior, since higher-rank types must have a superset |
| 699 | // of values of lower-rank types. |
| 700 | if (CGF.getContext().getFloatingTypeOrder(OrigSrcType, DstType) != 1) |
| 701 | return; |
| 702 | |
| 703 | assert(!OrigSrcType->isHalfType() && |
| 704 | "should not check conversion from __half, it has the lowest rank"); |
| 705 | |
| 706 | const llvm::fltSemantics &DstSema = |
| 707 | CGF.getContext().getFloatTypeSemantics(DstType); |
| 708 | APFloat MinBad = APFloat::getLargest(DstSema, false); |
| 709 | APFloat MaxBad = APFloat::getInf(DstSema, false); |
| 710 | |
| 711 | bool IsInexact; |
| 712 | MinBad.convert(SrcSema, APFloat::rmTowardZero, &IsInexact); |
| 713 | MaxBad.convert(SrcSema, APFloat::rmTowardZero, &IsInexact); |
| 714 | |
| 715 | Value *AbsSrc = CGF.EmitNounwindRuntimeCall( |
| 716 | CGF.CGM.getIntrinsic(llvm::Intrinsic::fabs, Src->getType()), Src); |
Richard Smith | aa62495 | 2013-03-19 00:01:12 +0000 | [diff] [blame] | 717 | llvm::Value *GE = |
Richard Smith | 5087645 | 2013-03-27 23:20:25 +0000 | [diff] [blame] | 718 | Builder.CreateFCmpOGT(AbsSrc, llvm::ConstantFP::get(VMContext, MinBad)); |
Richard Smith | aa62495 | 2013-03-19 00:01:12 +0000 | [diff] [blame] | 719 | llvm::Value *LE = |
Richard Smith | 5087645 | 2013-03-27 23:20:25 +0000 | [diff] [blame] | 720 | Builder.CreateFCmpOLT(AbsSrc, llvm::ConstantFP::get(VMContext, MaxBad)); |
| 721 | Check = Builder.CreateNot(Builder.CreateAnd(GE, LE)); |
Richard Smith | aa62495 | 2013-03-19 00:01:12 +0000 | [diff] [blame] | 722 | } |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 723 | } |
| 724 | |
| 725 | // FIXME: Provide a SourceLocation. |
| 726 | llvm::Constant *StaticArgs[] = { |
| 727 | CGF.EmitCheckTypeDescriptor(OrigSrcType), |
| 728 | CGF.EmitCheckTypeDescriptor(DstType) |
| 729 | }; |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 730 | CGF.EmitCheck(std::make_pair(Check, SanitizerKind::FloatCastOverflow), |
| 731 | "float_cast_overflow", StaticArgs, OrigSrc); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 732 | } |
| 733 | |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 734 | /// EmitScalarConversion - Emit a conversion from the specified type to the |
| 735 | /// specified destination type, both of which are LLVM scalar types. |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 736 | Value *ScalarExprEmitter::EmitScalarConversion(Value *Src, QualType SrcType, |
| 737 | QualType DstType) { |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 738 | SrcType = CGF.getContext().getCanonicalType(SrcType); |
| 739 | DstType = CGF.getContext().getCanonicalType(DstType); |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 740 | if (SrcType == DstType) return Src; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 741 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 742 | if (DstType->isVoidType()) return nullptr; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 743 | |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 744 | llvm::Value *OrigSrc = Src; |
| 745 | QualType OrigSrcType = SrcType; |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 746 | llvm::Type *SrcTy = Src->getType(); |
| 747 | |
Joey Gouly | 19dbb20 | 2013-01-23 11:56:20 +0000 | [diff] [blame] | 748 | // If casting to/from storage-only half FP, use special intrinsics. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 749 | if (SrcType->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType && |
| 750 | !CGF.getContext().getLangOpts().HalfArgsAndReturns) { |
| 751 | Src = Builder.CreateCall( |
| 752 | CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_from_fp16, |
| 753 | CGF.CGM.FloatTy), |
| 754 | Src); |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 755 | SrcType = CGF.getContext().FloatTy; |
Chris Lattner | 8b41868 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 756 | SrcTy = CGF.FloatTy; |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 757 | } |
| 758 | |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 759 | // Handle conversions to bool first, they are special: comparisons against 0. |
Chris Lattner | ed70f0a | 2007-08-26 16:52:28 +0000 | [diff] [blame] | 760 | if (DstType->isBooleanType()) |
| 761 | return EmitConversionToBool(Src, SrcType); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 762 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 763 | llvm::Type *DstTy = ConvertType(DstType); |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 764 | |
| 765 | // Ignore conversions like int -> uint. |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 766 | if (SrcTy == DstTy) |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 767 | return Src; |
| 768 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 769 | // Handle pointer conversions next: pointers can only be converted to/from |
| 770 | // other pointers and integers. Check for pointer types in terms of LLVM, as |
| 771 | // some native types (like Obj-C id) may map to a pointer type. |
Daniel Dunbar | 270cc66 | 2008-08-25 09:51:32 +0000 | [diff] [blame] | 772 | if (isa<llvm::PointerType>(DstTy)) { |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 773 | // The source value may be an integer, or a pointer. |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 774 | if (isa<llvm::PointerType>(SrcTy)) |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 775 | return Builder.CreateBitCast(Src, DstTy, "conv"); |
Anders Carlsson | 191dfe9 | 2009-09-12 04:57:16 +0000 | [diff] [blame] | 776 | |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 777 | assert(SrcType->isIntegerType() && "Not ptr->ptr or int->ptr conversion?"); |
Eli Friedman | 2561542 | 2009-03-04 04:02:35 +0000 | [diff] [blame] | 778 | // First, convert to the correct width so that we control the kind of |
| 779 | // extension. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 780 | llvm::Type *MiddleTy = CGF.IntPtrTy; |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 781 | bool InputSigned = SrcType->isSignedIntegerOrEnumerationType(); |
Eli Friedman | 2561542 | 2009-03-04 04:02:35 +0000 | [diff] [blame] | 782 | llvm::Value* IntResult = |
| 783 | Builder.CreateIntCast(Src, MiddleTy, InputSigned, "conv"); |
| 784 | // Then, cast to pointer. |
| 785 | return Builder.CreateIntToPtr(IntResult, DstTy, "conv"); |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 786 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 787 | |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 788 | if (isa<llvm::PointerType>(SrcTy)) { |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 789 | // Must be an ptr to int cast. |
| 790 | assert(isa<llvm::IntegerType>(DstTy) && "not ptr->int?"); |
Anders Carlsson | 50b5a30 | 2007-10-31 23:18:02 +0000 | [diff] [blame] | 791 | return Builder.CreatePtrToInt(Src, DstTy, "conv"); |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 792 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 793 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 794 | // A scalar can be splatted to an extended vector of the same element type |
Nate Begeman | 2ef13e5 | 2009-08-10 23:49:36 +0000 | [diff] [blame] | 795 | if (DstType->isExtVectorType() && !SrcType->isVectorType()) { |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 796 | // Cast the scalar to element type |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 797 | QualType EltTy = DstType->getAs<ExtVectorType>()->getElementType(); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 798 | llvm::Value *Elt = EmitScalarConversion(Src, SrcType, EltTy); |
| 799 | |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 800 | // Splat the element across to all elements |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 801 | unsigned NumElements = cast<llvm::VectorType>(DstTy)->getNumElements(); |
Benjamin Kramer | 0b22708 | 2013-01-01 20:08:10 +0000 | [diff] [blame] | 802 | return Builder.CreateVectorSplat(NumElements, Elt, "splat"); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 803 | } |
Nate Begeman | 4119d1a | 2007-12-30 02:59:45 +0000 | [diff] [blame] | 804 | |
Chris Lattner | 3b1ae00 | 2008-02-02 04:51:41 +0000 | [diff] [blame] | 805 | // Allow bitcast from vector to integer/fp of the same size. |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 806 | if (isa<llvm::VectorType>(SrcTy) || |
Chris Lattner | 3b1ae00 | 2008-02-02 04:51:41 +0000 | [diff] [blame] | 807 | isa<llvm::VectorType>(DstTy)) |
Anders Carlsson | 7019a9e | 2007-12-05 07:36:10 +0000 | [diff] [blame] | 808 | return Builder.CreateBitCast(Src, DstTy, "conv"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 809 | |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 810 | // Finally, we have the arithmetic types: real int/float. |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 811 | Value *Res = nullptr; |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 812 | llvm::Type *ResTy = DstTy; |
| 813 | |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 814 | // An overflowing conversion has undefined behavior if either the source type |
| 815 | // or the destination type is a floating-point type. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 816 | if (CGF.SanOpts.has(SanitizerKind::FloatCastOverflow) && |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 817 | (OrigSrcType->isFloatingType() || DstType->isFloatingType())) |
Will Dietz | 4f45bc0 | 2013-01-18 11:30:38 +0000 | [diff] [blame] | 818 | EmitFloatConversionCheck(OrigSrc, OrigSrcType, Src, SrcType, DstType, |
| 819 | DstTy); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 820 | |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 821 | // Cast to half via float |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 822 | if (DstType->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType && |
| 823 | !CGF.getContext().getLangOpts().HalfArgsAndReturns) |
Chris Lattner | 8b41868 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 824 | DstTy = CGF.FloatTy; |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 825 | |
| 826 | if (isa<llvm::IntegerType>(SrcTy)) { |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 827 | bool InputSigned = SrcType->isSignedIntegerOrEnumerationType(); |
Anders Carlsson | b5ce097 | 2007-12-26 18:20:19 +0000 | [diff] [blame] | 828 | if (isa<llvm::IntegerType>(DstTy)) |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 829 | Res = Builder.CreateIntCast(Src, DstTy, InputSigned, "conv"); |
Anders Carlsson | b5ce097 | 2007-12-26 18:20:19 +0000 | [diff] [blame] | 830 | else if (InputSigned) |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 831 | Res = Builder.CreateSIToFP(Src, DstTy, "conv"); |
Anders Carlsson | b5ce097 | 2007-12-26 18:20:19 +0000 | [diff] [blame] | 832 | else |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 833 | Res = Builder.CreateUIToFP(Src, DstTy, "conv"); |
| 834 | } else if (isa<llvm::IntegerType>(DstTy)) { |
| 835 | assert(SrcTy->isFloatingPointTy() && "Unknown real conversion"); |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 836 | if (DstType->isSignedIntegerOrEnumerationType()) |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 837 | Res = Builder.CreateFPToSI(Src, DstTy, "conv"); |
Anders Carlsson | b5ce097 | 2007-12-26 18:20:19 +0000 | [diff] [blame] | 838 | else |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 839 | Res = Builder.CreateFPToUI(Src, DstTy, "conv"); |
| 840 | } else { |
| 841 | assert(SrcTy->isFloatingPointTy() && DstTy->isFloatingPointTy() && |
| 842 | "Unknown real conversion"); |
| 843 | if (DstTy->getTypeID() < SrcTy->getTypeID()) |
| 844 | Res = Builder.CreateFPTrunc(Src, DstTy, "conv"); |
| 845 | else |
| 846 | Res = Builder.CreateFPExt(Src, DstTy, "conv"); |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 847 | } |
| 848 | |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 849 | if (DstTy != ResTy) { |
| 850 | assert(ResTy->isIntegerTy(16) && "Only half FP requires extra conversion"); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 851 | Res = Builder.CreateCall( |
| 852 | CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_to_fp16, CGF.CGM.FloatTy), |
| 853 | Res); |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 854 | } |
| 855 | |
| 856 | return Res; |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 857 | } |
| 858 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 859 | /// EmitComplexToScalarConversion - Emit a conversion from the specified complex |
| 860 | /// type to the specified destination type, where the destination type is an |
| 861 | /// LLVM scalar type. |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 862 | Value *ScalarExprEmitter:: |
| 863 | EmitComplexToScalarConversion(CodeGenFunction::ComplexPairTy Src, |
| 864 | QualType SrcTy, QualType DstTy) { |
Chris Lattner | ed70f0a | 2007-08-26 16:52:28 +0000 | [diff] [blame] | 865 | // Get the source element type. |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 866 | SrcTy = SrcTy->castAs<ComplexType>()->getElementType(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 867 | |
Chris Lattner | ed70f0a | 2007-08-26 16:52:28 +0000 | [diff] [blame] | 868 | // Handle conversions to bool first, they are special: comparisons against 0. |
| 869 | if (DstTy->isBooleanType()) { |
| 870 | // Complex != 0 -> (Real != 0) | (Imag != 0) |
| 871 | Src.first = EmitScalarConversion(Src.first, SrcTy, DstTy); |
| 872 | Src.second = EmitScalarConversion(Src.second, SrcTy, DstTy); |
| 873 | return Builder.CreateOr(Src.first, Src.second, "tobool"); |
| 874 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 875 | |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 876 | // C99 6.3.1.7p2: "When a value of complex type is converted to a real type, |
| 877 | // the imaginary part of the complex value is discarded and the value of the |
| 878 | // real part is converted according to the conversion rules for the |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 879 | // corresponding real type. |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 880 | return EmitScalarConversion(Src.first, SrcTy, DstTy); |
| 881 | } |
| 882 | |
Anders Carlsson | a40a9f3 | 2010-05-22 17:45:10 +0000 | [diff] [blame] | 883 | Value *ScalarExprEmitter::EmitNullValue(QualType Ty) { |
Richard Smith | 0dbe2fb | 2012-12-21 03:17:28 +0000 | [diff] [blame] | 884 | return CGF.EmitFromMemory(CGF.CGM.EmitNullConstant(Ty), Ty); |
Anders Carlsson | a40a9f3 | 2010-05-22 17:45:10 +0000 | [diff] [blame] | 885 | } |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 886 | |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 887 | /// \brief Emit a sanitization check for the given "binary" operation (which |
| 888 | /// might actually be a unary increment which has been lowered to a binary |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 889 | /// operation). The check passes if all values in \p Checks (which are \c i1), |
| 890 | /// are \c true. |
| 891 | void ScalarExprEmitter::EmitBinOpCheck( |
| 892 | ArrayRef<std::pair<Value *, SanitizerKind>> Checks, const BinOpInfo &Info) { |
| 893 | assert(CGF.IsSanitizerScope); |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 894 | StringRef CheckName; |
Dmitri Gribenko | cfa88f8 | 2013-01-12 19:30:44 +0000 | [diff] [blame] | 895 | SmallVector<llvm::Constant *, 4> StaticData; |
| 896 | SmallVector<llvm::Value *, 2> DynamicData; |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 897 | |
| 898 | BinaryOperatorKind Opcode = Info.Opcode; |
| 899 | if (BinaryOperator::isCompoundAssignmentOp(Opcode)) |
| 900 | Opcode = BinaryOperator::getOpForCompoundAssignment(Opcode); |
| 901 | |
| 902 | StaticData.push_back(CGF.EmitCheckSourceLocation(Info.E->getExprLoc())); |
| 903 | const UnaryOperator *UO = dyn_cast<UnaryOperator>(Info.E); |
| 904 | if (UO && UO->getOpcode() == UO_Minus) { |
| 905 | CheckName = "negate_overflow"; |
| 906 | StaticData.push_back(CGF.EmitCheckTypeDescriptor(UO->getType())); |
| 907 | DynamicData.push_back(Info.RHS); |
| 908 | } else { |
| 909 | if (BinaryOperator::isShiftOp(Opcode)) { |
| 910 | // Shift LHS negative or too large, or RHS out of bounds. |
| 911 | CheckName = "shift_out_of_bounds"; |
| 912 | const BinaryOperator *BO = cast<BinaryOperator>(Info.E); |
| 913 | StaticData.push_back( |
| 914 | CGF.EmitCheckTypeDescriptor(BO->getLHS()->getType())); |
| 915 | StaticData.push_back( |
| 916 | CGF.EmitCheckTypeDescriptor(BO->getRHS()->getType())); |
| 917 | } else if (Opcode == BO_Div || Opcode == BO_Rem) { |
| 918 | // Divide or modulo by zero, or signed overflow (eg INT_MAX / -1). |
| 919 | CheckName = "divrem_overflow"; |
Will Dietz | 822023a | 2013-01-07 22:25:52 +0000 | [diff] [blame] | 920 | StaticData.push_back(CGF.EmitCheckTypeDescriptor(Info.Ty)); |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 921 | } else { |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 922 | // Arithmetic overflow (+, -, *). |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 923 | switch (Opcode) { |
| 924 | case BO_Add: CheckName = "add_overflow"; break; |
| 925 | case BO_Sub: CheckName = "sub_overflow"; break; |
| 926 | case BO_Mul: CheckName = "mul_overflow"; break; |
| 927 | default: llvm_unreachable("unexpected opcode for bin op check"); |
| 928 | } |
Will Dietz | 822023a | 2013-01-07 22:25:52 +0000 | [diff] [blame] | 929 | StaticData.push_back(CGF.EmitCheckTypeDescriptor(Info.Ty)); |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 930 | } |
| 931 | DynamicData.push_back(Info.LHS); |
| 932 | DynamicData.push_back(Info.RHS); |
| 933 | } |
| 934 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 935 | CGF.EmitCheck(Checks, CheckName, StaticData, DynamicData); |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 936 | } |
| 937 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 938 | //===----------------------------------------------------------------------===// |
| 939 | // Visitor Methods |
| 940 | //===----------------------------------------------------------------------===// |
| 941 | |
| 942 | Value *ScalarExprEmitter::VisitExpr(Expr *E) { |
Daniel Dunbar | 488e993 | 2008-08-16 00:56:44 +0000 | [diff] [blame] | 943 | CGF.ErrorUnsupported(E, "scalar expression"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 944 | if (E->getType()->isVoidType()) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 945 | return nullptr; |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 946 | return llvm::UndefValue::get(CGF.ConvertType(E->getType())); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 947 | } |
| 948 | |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 949 | Value *ScalarExprEmitter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) { |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 950 | // Vector Mask Case |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 951 | if (E->getNumSubExprs() == 2 || |
Rafael Espindola | 3f4cb12 | 2010-06-09 02:17:08 +0000 | [diff] [blame] | 952 | (E->getNumSubExprs() == 3 && E->getExpr(2)->getType()->isVectorType())) { |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 953 | Value *LHS = CGF.EmitScalarExpr(E->getExpr(0)); |
| 954 | Value *RHS = CGF.EmitScalarExpr(E->getExpr(1)); |
| 955 | Value *Mask; |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 956 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 957 | llvm::VectorType *LTy = cast<llvm::VectorType>(LHS->getType()); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 958 | unsigned LHSElts = LTy->getNumElements(); |
| 959 | |
| 960 | if (E->getNumSubExprs() == 3) { |
| 961 | Mask = CGF.EmitScalarExpr(E->getExpr(2)); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 962 | |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 963 | // Shuffle LHS & RHS into one input vector. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 964 | SmallVector<llvm::Constant*, 32> concat; |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 965 | for (unsigned i = 0; i != LHSElts; ++i) { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 966 | concat.push_back(Builder.getInt32(2*i)); |
| 967 | concat.push_back(Builder.getInt32(2*i+1)); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 968 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 969 | |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 970 | Value* CV = llvm::ConstantVector::get(concat); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 971 | LHS = Builder.CreateShuffleVector(LHS, RHS, CV, "concat"); |
| 972 | LHSElts *= 2; |
| 973 | } else { |
| 974 | Mask = RHS; |
| 975 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 976 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 977 | llvm::VectorType *MTy = cast<llvm::VectorType>(Mask->getType()); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 978 | llvm::Constant* EltMask; |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 979 | |
Craig Topper | 2f66512 | 2013-08-01 06:42:40 +0000 | [diff] [blame] | 980 | EltMask = llvm::ConstantInt::get(MTy->getElementType(), |
| 981 | llvm::NextPowerOf2(LHSElts-1)-1); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 982 | |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 983 | // Mask off the high bits of each shuffle index. |
Chris Lattner | 2ce8842 | 2012-01-25 05:34:41 +0000 | [diff] [blame] | 984 | Value *MaskBits = llvm::ConstantVector::getSplat(MTy->getNumElements(), |
| 985 | EltMask); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 986 | Mask = Builder.CreateAnd(Mask, MaskBits, "mask"); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 987 | |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 988 | // newv = undef |
| 989 | // mask = mask & maskbits |
| 990 | // for each elt |
| 991 | // n = extract mask i |
| 992 | // x = extract val n |
| 993 | // newv = insert newv, x, i |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 994 | llvm::VectorType *RTy = llvm::VectorType::get(LTy->getElementType(), |
Craig Topper | 34d55e1 | 2013-07-27 05:00:42 +0000 | [diff] [blame] | 995 | MTy->getNumElements()); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 996 | Value* NewV = llvm::UndefValue::get(RTy); |
| 997 | for (unsigned i = 0, e = MTy->getNumElements(); i != e; ++i) { |
Stephen Hines | c568f1e | 2014-07-21 00:47:37 -0700 | [diff] [blame] | 998 | Value *IIndx = llvm::ConstantInt::get(CGF.SizeTy, i); |
Eli Friedman | 87b9c03 | 2012-04-05 21:48:40 +0000 | [diff] [blame] | 999 | Value *Indx = Builder.CreateExtractElement(Mask, IIndx, "shuf_idx"); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1000 | |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 1001 | Value *VExt = Builder.CreateExtractElement(LHS, Indx, "shuf_elt"); |
Eli Friedman | 87b9c03 | 2012-04-05 21:48:40 +0000 | [diff] [blame] | 1002 | NewV = Builder.CreateInsertElement(NewV, VExt, IIndx, "shuf_ins"); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 1003 | } |
| 1004 | return NewV; |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 1005 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1006 | |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 1007 | Value* V1 = CGF.EmitScalarExpr(E->getExpr(0)); |
| 1008 | Value* V2 = CGF.EmitScalarExpr(E->getExpr(1)); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1009 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1010 | SmallVector<llvm::Constant*, 32> indices; |
Craig Topper | 72c422c | 2013-08-01 04:51:48 +0000 | [diff] [blame] | 1011 | for (unsigned i = 2; i < E->getNumSubExprs(); ++i) { |
Craig Topper | 6f4f808 | 2013-08-03 17:40:38 +0000 | [diff] [blame] | 1012 | llvm::APSInt Idx = E->getShuffleMaskIdx(CGF.getContext(), i-2); |
| 1013 | // Check for -1 and output it as undef in the IR. |
| 1014 | if (Idx.isSigned() && Idx.isAllOnesValue()) |
| 1015 | indices.push_back(llvm::UndefValue::get(CGF.Int32Ty)); |
| 1016 | else |
| 1017 | indices.push_back(Builder.getInt32(Idx.getZExtValue())); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 1018 | } |
| 1019 | |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1020 | Value *SV = llvm::ConstantVector::get(indices); |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 1021 | return Builder.CreateShuffleVector(V1, V2, SV, "shuffle"); |
| 1022 | } |
Hal Finkel | 414a1bd | 2013-09-18 03:29:45 +0000 | [diff] [blame] | 1023 | |
| 1024 | Value *ScalarExprEmitter::VisitConvertVectorExpr(ConvertVectorExpr *E) { |
| 1025 | QualType SrcType = E->getSrcExpr()->getType(), |
| 1026 | DstType = E->getType(); |
| 1027 | |
| 1028 | Value *Src = CGF.EmitScalarExpr(E->getSrcExpr()); |
| 1029 | |
| 1030 | SrcType = CGF.getContext().getCanonicalType(SrcType); |
| 1031 | DstType = CGF.getContext().getCanonicalType(DstType); |
| 1032 | if (SrcType == DstType) return Src; |
| 1033 | |
| 1034 | assert(SrcType->isVectorType() && |
| 1035 | "ConvertVector source type must be a vector"); |
| 1036 | assert(DstType->isVectorType() && |
| 1037 | "ConvertVector destination type must be a vector"); |
| 1038 | |
| 1039 | llvm::Type *SrcTy = Src->getType(); |
| 1040 | llvm::Type *DstTy = ConvertType(DstType); |
| 1041 | |
| 1042 | // Ignore conversions like int -> uint. |
| 1043 | if (SrcTy == DstTy) |
| 1044 | return Src; |
| 1045 | |
| 1046 | QualType SrcEltType = SrcType->getAs<VectorType>()->getElementType(), |
| 1047 | DstEltType = DstType->getAs<VectorType>()->getElementType(); |
| 1048 | |
| 1049 | assert(SrcTy->isVectorTy() && |
| 1050 | "ConvertVector source IR type must be a vector"); |
| 1051 | assert(DstTy->isVectorTy() && |
| 1052 | "ConvertVector destination IR type must be a vector"); |
| 1053 | |
| 1054 | llvm::Type *SrcEltTy = SrcTy->getVectorElementType(), |
| 1055 | *DstEltTy = DstTy->getVectorElementType(); |
| 1056 | |
| 1057 | if (DstEltType->isBooleanType()) { |
| 1058 | assert((SrcEltTy->isFloatingPointTy() || |
| 1059 | isa<llvm::IntegerType>(SrcEltTy)) && "Unknown boolean conversion"); |
| 1060 | |
| 1061 | llvm::Value *Zero = llvm::Constant::getNullValue(SrcTy); |
| 1062 | if (SrcEltTy->isFloatingPointTy()) { |
| 1063 | return Builder.CreateFCmpUNE(Src, Zero, "tobool"); |
| 1064 | } else { |
| 1065 | return Builder.CreateICmpNE(Src, Zero, "tobool"); |
| 1066 | } |
| 1067 | } |
| 1068 | |
| 1069 | // We have the arithmetic types: real int/float. |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1070 | Value *Res = nullptr; |
Hal Finkel | 414a1bd | 2013-09-18 03:29:45 +0000 | [diff] [blame] | 1071 | |
| 1072 | if (isa<llvm::IntegerType>(SrcEltTy)) { |
| 1073 | bool InputSigned = SrcEltType->isSignedIntegerOrEnumerationType(); |
| 1074 | if (isa<llvm::IntegerType>(DstEltTy)) |
| 1075 | Res = Builder.CreateIntCast(Src, DstTy, InputSigned, "conv"); |
| 1076 | else if (InputSigned) |
| 1077 | Res = Builder.CreateSIToFP(Src, DstTy, "conv"); |
| 1078 | else |
| 1079 | Res = Builder.CreateUIToFP(Src, DstTy, "conv"); |
| 1080 | } else if (isa<llvm::IntegerType>(DstEltTy)) { |
| 1081 | assert(SrcEltTy->isFloatingPointTy() && "Unknown real conversion"); |
| 1082 | if (DstEltType->isSignedIntegerOrEnumerationType()) |
| 1083 | Res = Builder.CreateFPToSI(Src, DstTy, "conv"); |
| 1084 | else |
| 1085 | Res = Builder.CreateFPToUI(Src, DstTy, "conv"); |
| 1086 | } else { |
| 1087 | assert(SrcEltTy->isFloatingPointTy() && DstEltTy->isFloatingPointTy() && |
| 1088 | "Unknown real conversion"); |
| 1089 | if (DstEltTy->getTypeID() < SrcEltTy->getTypeID()) |
| 1090 | Res = Builder.CreateFPTrunc(Src, DstTy, "conv"); |
| 1091 | else |
| 1092 | Res = Builder.CreateFPExt(Src, DstTy, "conv"); |
| 1093 | } |
| 1094 | |
| 1095 | return Res; |
| 1096 | } |
| 1097 | |
Eli Friedman | 2866527 | 2009-11-26 03:22:21 +0000 | [diff] [blame] | 1098 | Value *ScalarExprEmitter::VisitMemberExpr(MemberExpr *E) { |
Richard Smith | 80d4b55 | 2011-12-28 19:48:30 +0000 | [diff] [blame] | 1099 | llvm::APSInt Value; |
| 1100 | if (E->EvaluateAsInt(Value, CGF.getContext(), Expr::SE_AllowSideEffects)) { |
Eli Friedman | 2866527 | 2009-11-26 03:22:21 +0000 | [diff] [blame] | 1101 | if (E->isArrow()) |
| 1102 | CGF.EmitScalarExpr(E->getBase()); |
| 1103 | else |
| 1104 | EmitLValue(E->getBase()); |
Richard Smith | 80d4b55 | 2011-12-28 19:48:30 +0000 | [diff] [blame] | 1105 | return Builder.getInt(Value); |
Eli Friedman | 2866527 | 2009-11-26 03:22:21 +0000 | [diff] [blame] | 1106 | } |
Devang Patel | 78ba3d4 | 2010-10-04 21:46:04 +0000 | [diff] [blame] | 1107 | |
Eli Friedman | 2866527 | 2009-11-26 03:22:21 +0000 | [diff] [blame] | 1108 | return EmitLoadOfLValue(E); |
| 1109 | } |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 1110 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1111 | Value *ScalarExprEmitter::VisitArraySubscriptExpr(ArraySubscriptExpr *E) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 1112 | TestAndClearIgnoreResultAssign(); |
| 1113 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1114 | // Emit subscript expressions in rvalue context's. For most cases, this just |
| 1115 | // loads the lvalue formed by the subscript expr. However, we have to be |
| 1116 | // careful, because the base of a vector subscript is occasionally an rvalue, |
| 1117 | // so we can't get it as an lvalue. |
| 1118 | if (!E->getBase()->getType()->isVectorType()) |
| 1119 | return EmitLoadOfLValue(E); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1120 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1121 | // Handle the vector case. The base must be a vector, the index must be an |
| 1122 | // integer value. |
| 1123 | Value *Base = Visit(E->getBase()); |
| 1124 | Value *Idx = Visit(E->getIdx()); |
Richard Smith | a0a628f | 2013-02-23 02:53:19 +0000 | [diff] [blame] | 1125 | QualType IdxTy = E->getIdx()->getType(); |
| 1126 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1127 | if (CGF.SanOpts.has(SanitizerKind::ArrayBounds)) |
Richard Smith | a0a628f | 2013-02-23 02:53:19 +0000 | [diff] [blame] | 1128 | CGF.EmitBoundsCheck(E, E->getBase(), Idx, IdxTy, /*Accessed*/true); |
| 1129 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1130 | return Builder.CreateExtractElement(Base, Idx, "vecext"); |
| 1131 | } |
| 1132 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1133 | static llvm::Constant *getMaskElt(llvm::ShuffleVectorInst *SVI, unsigned Idx, |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1134 | unsigned Off, llvm::Type *I32Ty) { |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1135 | int MV = SVI->getMaskValue(Idx); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1136 | if (MV == -1) |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1137 | return llvm::UndefValue::get(I32Ty); |
| 1138 | return llvm::ConstantInt::get(I32Ty, Off+MV); |
| 1139 | } |
| 1140 | |
| 1141 | Value *ScalarExprEmitter::VisitInitListExpr(InitListExpr *E) { |
| 1142 | bool Ignore = TestAndClearIgnoreResultAssign(); |
| 1143 | (void)Ignore; |
| 1144 | assert (Ignore == false && "init list ignored"); |
| 1145 | unsigned NumInitElements = E->getNumInits(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1146 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1147 | if (E->hadArrayRangeDesignator()) |
| 1148 | CGF.ErrorUnsupported(E, "GNU array range designator extension"); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1149 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1150 | llvm::VectorType *VType = |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1151 | dyn_cast<llvm::VectorType>(ConvertType(E->getType())); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1152 | |
Sebastian Redl | cea8d96 | 2011-09-24 17:48:14 +0000 | [diff] [blame] | 1153 | if (!VType) { |
| 1154 | if (NumInitElements == 0) { |
| 1155 | // C++11 value-initialization for the scalar. |
| 1156 | return EmitNullValue(E->getType()); |
| 1157 | } |
| 1158 | // We have a scalar in braces. Just use the first element. |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1159 | return Visit(E->getInit(0)); |
Sebastian Redl | cea8d96 | 2011-09-24 17:48:14 +0000 | [diff] [blame] | 1160 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1161 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1162 | unsigned ResElts = VType->getNumElements(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1163 | |
| 1164 | // Loop over initializers collecting the Value for each, and remembering |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1165 | // whether the source was swizzle (ExtVectorElementExpr). This will allow |
| 1166 | // us to fold the shuffle for the swizzle into the shuffle for the vector |
| 1167 | // initializer, since LLVM optimizers generally do not want to touch |
| 1168 | // shuffles. |
| 1169 | unsigned CurIdx = 0; |
| 1170 | bool VIsUndefShuffle = false; |
| 1171 | llvm::Value *V = llvm::UndefValue::get(VType); |
| 1172 | for (unsigned i = 0; i != NumInitElements; ++i) { |
| 1173 | Expr *IE = E->getInit(i); |
| 1174 | Value *Init = Visit(IE); |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1175 | SmallVector<llvm::Constant*, 16> Args; |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1176 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1177 | llvm::VectorType *VVT = dyn_cast<llvm::VectorType>(Init->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1178 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1179 | // Handle scalar elements. If the scalar initializer is actually one |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1180 | // element of a different vector of the same width, use shuffle instead of |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1181 | // extract+insert. |
| 1182 | if (!VVT) { |
| 1183 | if (isa<ExtVectorElementExpr>(IE)) { |
| 1184 | llvm::ExtractElementInst *EI = cast<llvm::ExtractElementInst>(Init); |
| 1185 | |
| 1186 | if (EI->getVectorOperandType()->getNumElements() == ResElts) { |
| 1187 | llvm::ConstantInt *C = cast<llvm::ConstantInt>(EI->getIndexOperand()); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1188 | Value *LHS = nullptr, *RHS = nullptr; |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1189 | if (CurIdx == 0) { |
| 1190 | // insert into undef -> shuffle (src, undef) |
| 1191 | Args.push_back(C); |
Benjamin Kramer | 14c5982 | 2012-02-14 12:06:21 +0000 | [diff] [blame] | 1192 | Args.resize(ResElts, llvm::UndefValue::get(CGF.Int32Ty)); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1193 | |
| 1194 | LHS = EI->getVectorOperand(); |
| 1195 | RHS = V; |
| 1196 | VIsUndefShuffle = true; |
| 1197 | } else if (VIsUndefShuffle) { |
| 1198 | // insert into undefshuffle && size match -> shuffle (v, src) |
| 1199 | llvm::ShuffleVectorInst *SVV = cast<llvm::ShuffleVectorInst>(V); |
| 1200 | for (unsigned j = 0; j != CurIdx; ++j) |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 1201 | Args.push_back(getMaskElt(SVV, j, 0, CGF.Int32Ty)); |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1202 | Args.push_back(Builder.getInt32(ResElts + C->getZExtValue())); |
Benjamin Kramer | 14c5982 | 2012-02-14 12:06:21 +0000 | [diff] [blame] | 1203 | Args.resize(ResElts, llvm::UndefValue::get(CGF.Int32Ty)); |
| 1204 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1205 | LHS = cast<llvm::ShuffleVectorInst>(V)->getOperand(0); |
| 1206 | RHS = EI->getVectorOperand(); |
| 1207 | VIsUndefShuffle = false; |
| 1208 | } |
| 1209 | if (!Args.empty()) { |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1210 | llvm::Constant *Mask = llvm::ConstantVector::get(Args); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1211 | V = Builder.CreateShuffleVector(LHS, RHS, Mask); |
| 1212 | ++CurIdx; |
| 1213 | continue; |
| 1214 | } |
| 1215 | } |
| 1216 | } |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1217 | V = Builder.CreateInsertElement(V, Init, Builder.getInt32(CurIdx), |
| 1218 | "vecinit"); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1219 | VIsUndefShuffle = false; |
| 1220 | ++CurIdx; |
| 1221 | continue; |
| 1222 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1223 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1224 | unsigned InitElts = VVT->getNumElements(); |
| 1225 | |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1226 | // If the initializer is an ExtVecEltExpr (a swizzle), and the swizzle's |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1227 | // input is the same width as the vector being constructed, generate an |
| 1228 | // optimized shuffle of the swizzle input into the result. |
Nate Begeman | a99f083 | 2009-10-25 02:26:01 +0000 | [diff] [blame] | 1229 | unsigned Offset = (CurIdx == 0) ? 0 : ResElts; |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1230 | if (isa<ExtVectorElementExpr>(IE)) { |
| 1231 | llvm::ShuffleVectorInst *SVI = cast<llvm::ShuffleVectorInst>(Init); |
| 1232 | Value *SVOp = SVI->getOperand(0); |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1233 | llvm::VectorType *OpTy = cast<llvm::VectorType>(SVOp->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1234 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1235 | if (OpTy->getNumElements() == ResElts) { |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1236 | for (unsigned j = 0; j != CurIdx; ++j) { |
| 1237 | // If the current vector initializer is a shuffle with undef, merge |
| 1238 | // this shuffle directly into it. |
| 1239 | if (VIsUndefShuffle) { |
| 1240 | Args.push_back(getMaskElt(cast<llvm::ShuffleVectorInst>(V), j, 0, |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 1241 | CGF.Int32Ty)); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1242 | } else { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1243 | Args.push_back(Builder.getInt32(j)); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1244 | } |
| 1245 | } |
| 1246 | for (unsigned j = 0, je = InitElts; j != je; ++j) |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 1247 | Args.push_back(getMaskElt(SVI, j, Offset, CGF.Int32Ty)); |
Benjamin Kramer | 14c5982 | 2012-02-14 12:06:21 +0000 | [diff] [blame] | 1248 | Args.resize(ResElts, llvm::UndefValue::get(CGF.Int32Ty)); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1249 | |
| 1250 | if (VIsUndefShuffle) |
| 1251 | V = cast<llvm::ShuffleVectorInst>(V)->getOperand(0); |
| 1252 | |
| 1253 | Init = SVOp; |
| 1254 | } |
| 1255 | } |
| 1256 | |
| 1257 | // Extend init to result vector length, and then shuffle its contribution |
| 1258 | // to the vector initializer into V. |
| 1259 | if (Args.empty()) { |
| 1260 | for (unsigned j = 0; j != InitElts; ++j) |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1261 | Args.push_back(Builder.getInt32(j)); |
Benjamin Kramer | 14c5982 | 2012-02-14 12:06:21 +0000 | [diff] [blame] | 1262 | Args.resize(ResElts, llvm::UndefValue::get(CGF.Int32Ty)); |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1263 | llvm::Constant *Mask = llvm::ConstantVector::get(Args); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1264 | Init = Builder.CreateShuffleVector(Init, llvm::UndefValue::get(VVT), |
Nate Begeman | a99f083 | 2009-10-25 02:26:01 +0000 | [diff] [blame] | 1265 | Mask, "vext"); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1266 | |
| 1267 | Args.clear(); |
| 1268 | for (unsigned j = 0; j != CurIdx; ++j) |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1269 | Args.push_back(Builder.getInt32(j)); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1270 | for (unsigned j = 0; j != InitElts; ++j) |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1271 | Args.push_back(Builder.getInt32(j+Offset)); |
Benjamin Kramer | 14c5982 | 2012-02-14 12:06:21 +0000 | [diff] [blame] | 1272 | Args.resize(ResElts, llvm::UndefValue::get(CGF.Int32Ty)); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1273 | } |
| 1274 | |
| 1275 | // If V is undef, make sure it ends up on the RHS of the shuffle to aid |
| 1276 | // merging subsequent shuffles into this one. |
| 1277 | if (CurIdx == 0) |
| 1278 | std::swap(V, Init); |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1279 | llvm::Constant *Mask = llvm::ConstantVector::get(Args); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1280 | V = Builder.CreateShuffleVector(V, Init, Mask, "vecinit"); |
| 1281 | VIsUndefShuffle = isa<llvm::UndefValue>(Init); |
| 1282 | CurIdx += InitElts; |
| 1283 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1284 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1285 | // FIXME: evaluate codegen vs. shuffling against constant null vector. |
| 1286 | // Emit remaining default initializers. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1287 | llvm::Type *EltTy = VType->getElementType(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1288 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1289 | // Emit remaining default initializers |
| 1290 | for (/* Do not initialize i*/; CurIdx < ResElts; ++CurIdx) { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1291 | Value *Idx = Builder.getInt32(CurIdx); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1292 | llvm::Value *Init = llvm::Constant::getNullValue(EltTy); |
| 1293 | V = Builder.CreateInsertElement(V, Init, Idx, "vecinit"); |
| 1294 | } |
| 1295 | return V; |
| 1296 | } |
| 1297 | |
Anders Carlsson | a3697c9 | 2009-11-23 17:57:54 +0000 | [diff] [blame] | 1298 | static bool ShouldNullCheckClassCastValue(const CastExpr *CE) { |
| 1299 | const Expr *E = CE->getSubExpr(); |
John McCall | 23cba80 | 2010-03-30 23:58:03 +0000 | [diff] [blame] | 1300 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1301 | if (CE->getCastKind() == CK_UncheckedDerivedToBase) |
John McCall | 23cba80 | 2010-03-30 23:58:03 +0000 | [diff] [blame] | 1302 | return false; |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1303 | |
Anders Carlsson | a3697c9 | 2009-11-23 17:57:54 +0000 | [diff] [blame] | 1304 | if (isa<CXXThisExpr>(E)) { |
| 1305 | // We always assume that 'this' is never null. |
| 1306 | return false; |
| 1307 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1308 | |
Anders Carlsson | a3697c9 | 2009-11-23 17:57:54 +0000 | [diff] [blame] | 1309 | if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(CE)) { |
Sebastian Redl | 906082e | 2010-07-20 04:20:21 +0000 | [diff] [blame] | 1310 | // And that glvalue casts are never null. |
John McCall | 5baba9d | 2010-08-25 10:28:54 +0000 | [diff] [blame] | 1311 | if (ICE->getValueKind() != VK_RValue) |
Anders Carlsson | a3697c9 | 2009-11-23 17:57:54 +0000 | [diff] [blame] | 1312 | return false; |
| 1313 | } |
| 1314 | |
| 1315 | return true; |
| 1316 | } |
| 1317 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1318 | // VisitCastExpr - Emit code for an explicit or implicit cast. Implicit casts |
| 1319 | // have to handle a more broad range of conversions than explicit casts, as they |
| 1320 | // handle things like function to ptr-to-function decay etc. |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1321 | Value *ScalarExprEmitter::VisitCastExpr(CastExpr *CE) { |
Eli Friedman | d888962 | 2009-11-27 04:41:50 +0000 | [diff] [blame] | 1322 | Expr *E = CE->getSubExpr(); |
Anders Carlsson | 592a2bb | 2009-09-22 22:00:46 +0000 | [diff] [blame] | 1323 | QualType DestTy = CE->getType(); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1324 | CastKind Kind = CE->getCastKind(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1325 | |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 1326 | if (!DestTy->isVoidType()) |
| 1327 | TestAndClearIgnoreResultAssign(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1328 | |
Eli Friedman | 8c3e7e7 | 2009-11-27 02:07:44 +0000 | [diff] [blame] | 1329 | // Since almost all cast kinds apply to scalars, this switch doesn't have |
| 1330 | // a default case, so the compiler will warn on a missing case. The cases |
| 1331 | // are in the same order as in the CastKind enum. |
Anders Carlsson | e977624 | 2009-08-24 18:26:39 +0000 | [diff] [blame] | 1332 | switch (Kind) { |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 1333 | case CK_Dependent: llvm_unreachable("dependent cast kind in IR gen!"); |
Eli Friedman | a6c66ce | 2012-08-31 00:14:07 +0000 | [diff] [blame] | 1334 | case CK_BuiltinFnToFnPtr: |
| 1335 | llvm_unreachable("builtin functions are handled elsewhere"); |
| 1336 | |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1337 | case CK_LValueBitCast: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1338 | case CK_ObjCObjectLValueCast: { |
Douglas Gregor | e39a389 | 2010-07-13 23:17:26 +0000 | [diff] [blame] | 1339 | Value *V = EmitLValue(E).getAddress(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1340 | V = Builder.CreateBitCast(V, |
Douglas Gregor | e39a389 | 2010-07-13 23:17:26 +0000 | [diff] [blame] | 1341 | ConvertType(CGF.getContext().getPointerType(DestTy))); |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 1342 | return EmitLoadOfLValue(CGF.MakeNaturalAlignAddrLValue(V, DestTy), |
| 1343 | CE->getExprLoc()); |
Douglas Gregor | e39a389 | 2010-07-13 23:17:26 +0000 | [diff] [blame] | 1344 | } |
John McCall | dc05b11 | 2011-09-10 01:16:55 +0000 | [diff] [blame] | 1345 | |
John McCall | 1d9b3b2 | 2011-09-09 05:25:32 +0000 | [diff] [blame] | 1346 | case CK_CPointerToObjCPointerCast: |
| 1347 | case CK_BlockPointerToObjCPointerCast: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1348 | case CK_AnyPointerToBlockPointerCast: |
| 1349 | case CK_BitCast: { |
Anders Carlsson | cb3c308 | 2009-09-01 20:52:42 +0000 | [diff] [blame] | 1350 | Value *Src = Visit(const_cast<Expr*>(E)); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1351 | llvm::Type *SrcTy = Src->getType(); |
| 1352 | llvm::Type *DstTy = ConvertType(DestTy); |
| 1353 | if (SrcTy->isPtrOrPtrVectorTy() && DstTy->isPtrOrPtrVectorTy() && |
| 1354 | SrcTy->getPointerAddressSpace() != DstTy->getPointerAddressSpace()) { |
Stephen Hines | 0e2c34f | 2015-03-23 12:09:02 -0700 | [diff] [blame^] | 1355 | llvm_unreachable("wrong cast for pointers in different address spaces" |
| 1356 | "(must be an address space cast)!"); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1357 | } |
| 1358 | return Builder.CreateBitCast(Src, DstTy); |
| 1359 | } |
| 1360 | case CK_AddressSpaceConversion: { |
| 1361 | Value *Src = Visit(const_cast<Expr*>(E)); |
| 1362 | return Builder.CreateAddrSpaceCast(Src, ConvertType(DestTy)); |
Anders Carlsson | cb3c308 | 2009-09-01 20:52:42 +0000 | [diff] [blame] | 1363 | } |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1364 | case CK_AtomicToNonAtomic: |
| 1365 | case CK_NonAtomicToAtomic: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1366 | case CK_NoOp: |
| 1367 | case CK_UserDefinedConversion: |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1368 | return Visit(const_cast<Expr*>(E)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1369 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1370 | case CK_BaseToDerived: { |
Jordan Rose | 041ce8e | 2012-10-03 01:08:28 +0000 | [diff] [blame] | 1371 | const CXXRecordDecl *DerivedClassDecl = DestTy->getPointeeCXXRecordDecl(); |
| 1372 | assert(DerivedClassDecl && "BaseToDerived arg isn't a C++ object pointer!"); |
| 1373 | |
Richard Smith | c764830 | 2013-02-13 21:18:23 +0000 | [diff] [blame] | 1374 | llvm::Value *V = Visit(E); |
| 1375 | |
Filipe Cabecinhas | 8593e78 | 2013-08-08 01:08:17 +0000 | [diff] [blame] | 1376 | llvm::Value *Derived = |
| 1377 | CGF.GetAddressOfDerivedClass(V, DerivedClassDecl, |
| 1378 | CE->path_begin(), CE->path_end(), |
| 1379 | ShouldNullCheckClassCastValue(CE)); |
| 1380 | |
Richard Smith | c764830 | 2013-02-13 21:18:23 +0000 | [diff] [blame] | 1381 | // C++11 [expr.static.cast]p11: Behavior is undefined if a downcast is |
| 1382 | // performed and the object is not of the derived type. |
Stephen Hines | c568f1e | 2014-07-21 00:47:37 -0700 | [diff] [blame] | 1383 | if (CGF.sanitizePerformTypeCheck()) |
Richard Smith | c764830 | 2013-02-13 21:18:23 +0000 | [diff] [blame] | 1384 | CGF.EmitTypeCheck(CodeGenFunction::TCK_DowncastPointer, CE->getExprLoc(), |
Filipe Cabecinhas | 8593e78 | 2013-08-08 01:08:17 +0000 | [diff] [blame] | 1385 | Derived, DestTy->getPointeeType()); |
Richard Smith | c764830 | 2013-02-13 21:18:23 +0000 | [diff] [blame] | 1386 | |
Filipe Cabecinhas | 8593e78 | 2013-08-08 01:08:17 +0000 | [diff] [blame] | 1387 | return Derived; |
Anders Carlsson | a3697c9 | 2009-11-23 17:57:54 +0000 | [diff] [blame] | 1388 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1389 | case CK_UncheckedDerivedToBase: |
| 1390 | case CK_DerivedToBase: { |
Jordan Rose | 041ce8e | 2012-10-03 01:08:28 +0000 | [diff] [blame] | 1391 | const CXXRecordDecl *DerivedClassDecl = |
| 1392 | E->getType()->getPointeeCXXRecordDecl(); |
| 1393 | assert(DerivedClassDecl && "DerivedToBase arg isn't a C++ object pointer!"); |
Anders Carlsson | 191dfe9 | 2009-09-12 04:57:16 +0000 | [diff] [blame] | 1394 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1395 | return CGF.GetAddressOfBaseClass( |
| 1396 | Visit(E), DerivedClassDecl, CE->path_begin(), CE->path_end(), |
| 1397 | ShouldNullCheckClassCastValue(CE), CE->getExprLoc()); |
Anders Carlsson | 191dfe9 | 2009-09-12 04:57:16 +0000 | [diff] [blame] | 1398 | } |
Anders Carlsson | 575b374 | 2011-04-11 02:03:26 +0000 | [diff] [blame] | 1399 | case CK_Dynamic: { |
Eli Friedman | 8c3e7e7 | 2009-11-27 02:07:44 +0000 | [diff] [blame] | 1400 | Value *V = Visit(const_cast<Expr*>(E)); |
| 1401 | const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(CE); |
| 1402 | return CGF.EmitDynamicCast(V, DCE); |
| 1403 | } |
Eli Friedman | d888962 | 2009-11-27 04:41:50 +0000 | [diff] [blame] | 1404 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1405 | case CK_ArrayToPointerDecay: { |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1406 | assert(E->getType()->isArrayType() && |
| 1407 | "Array to pointer decay must have array source type!"); |
| 1408 | |
| 1409 | Value *V = EmitLValue(E).getAddress(); // Bitfields can't be arrays. |
| 1410 | |
| 1411 | // Note that VLA pointers are always decayed, so we don't need to do |
| 1412 | // anything here. |
| 1413 | if (!E->getType()->isVariableArrayType()) { |
| 1414 | assert(isa<llvm::PointerType>(V->getType()) && "Expected pointer"); |
Stephen Hines | 0e2c34f | 2015-03-23 12:09:02 -0700 | [diff] [blame^] | 1415 | V = CGF.Builder.CreatePointerCast( |
| 1416 | V, ConvertType(E->getType())->getPointerTo( |
| 1417 | V->getType()->getPointerAddressSpace())); |
| 1418 | |
| 1419 | assert(isa<llvm::ArrayType>(V->getType()->getPointerElementType()) && |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1420 | "Expected pointer to array"); |
| 1421 | V = Builder.CreateStructGEP(V, 0, "arraydecay"); |
| 1422 | } |
| 1423 | |
Chris Lattner | 410b12e | 2011-07-20 04:31:01 +0000 | [diff] [blame] | 1424 | // Make sure the array decay ends up being the right type. This matters if |
| 1425 | // the array type was of an incomplete type. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1426 | return CGF.Builder.CreatePointerCast(V, ConvertType(CE->getType())); |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1427 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1428 | case CK_FunctionToPointerDecay: |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1429 | return EmitLValue(E).getAddress(); |
| 1430 | |
John McCall | 404cd16 | 2010-11-13 01:35:44 +0000 | [diff] [blame] | 1431 | case CK_NullToPointer: |
| 1432 | if (MustVisitNullValue(E)) |
| 1433 | (void) Visit(E); |
| 1434 | |
| 1435 | return llvm::ConstantPointerNull::get( |
| 1436 | cast<llvm::PointerType>(ConvertType(DestTy))); |
| 1437 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1438 | case CK_NullToMemberPointer: { |
John McCall | 404cd16 | 2010-11-13 01:35:44 +0000 | [diff] [blame] | 1439 | if (MustVisitNullValue(E)) |
John McCall | d608cdb | 2010-08-22 10:59:02 +0000 | [diff] [blame] | 1440 | (void) Visit(E); |
| 1441 | |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 1442 | const MemberPointerType *MPT = CE->getType()->getAs<MemberPointerType>(); |
| 1443 | return CGF.CGM.getCXXABI().EmitNullMemberPointer(MPT); |
| 1444 | } |
Anders Carlsson | 191dfe9 | 2009-09-12 04:57:16 +0000 | [diff] [blame] | 1445 | |
John McCall | 4d4e5c1 | 2012-02-15 01:22:51 +0000 | [diff] [blame] | 1446 | case CK_ReinterpretMemberPointer: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1447 | case CK_BaseToDerivedMemberPointer: |
| 1448 | case CK_DerivedToBaseMemberPointer: { |
Eli Friedman | d888962 | 2009-11-27 04:41:50 +0000 | [diff] [blame] | 1449 | Value *Src = Visit(E); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1450 | |
John McCall | d608cdb | 2010-08-22 10:59:02 +0000 | [diff] [blame] | 1451 | // Note that the AST doesn't distinguish between checked and |
| 1452 | // unchecked member pointer conversions, so we always have to |
| 1453 | // implement checked conversions here. This is inefficient when |
| 1454 | // actual control flow may be required in order to perform the |
| 1455 | // check, which it is for data member pointers (but not member |
| 1456 | // function pointers on Itanium and ARM). |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 1457 | return CGF.CGM.getCXXABI().EmitMemberPointerConversion(CGF, CE, Src); |
Eli Friedman | d888962 | 2009-11-27 04:41:50 +0000 | [diff] [blame] | 1458 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1459 | |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 1460 | case CK_ARCProduceObject: |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1461 | return CGF.EmitARCRetainScalarExpr(E); |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 1462 | case CK_ARCConsumeObject: |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1463 | return CGF.EmitObjCConsumeObject(E->getType(), Visit(E)); |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 1464 | case CK_ARCReclaimReturnedObject: { |
John McCall | 7e5e5f4 | 2011-07-07 06:58:02 +0000 | [diff] [blame] | 1465 | llvm::Value *value = Visit(E); |
| 1466 | value = CGF.EmitARCRetainAutoreleasedReturnValue(value); |
| 1467 | return CGF.EmitObjCConsumeObject(E->getType(), value); |
| 1468 | } |
John McCall | 348f16f | 2011-10-04 06:23:45 +0000 | [diff] [blame] | 1469 | case CK_ARCExtendBlockObject: |
| 1470 | return CGF.EmitARCExtendBlockObject(E); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1471 | |
Douglas Gregor | ac1303e | 2012-02-22 05:02:47 +0000 | [diff] [blame] | 1472 | case CK_CopyAndAutoreleaseBlockObject: |
Eli Friedman | cae40c4 | 2012-02-28 01:08:45 +0000 | [diff] [blame] | 1473 | return CGF.EmitBlockCopyAndAutorelease(Visit(E), E->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1474 | |
John McCall | 2bb5d00 | 2010-11-13 09:02:35 +0000 | [diff] [blame] | 1475 | case CK_FloatingRealToComplex: |
| 1476 | case CK_FloatingComplexCast: |
| 1477 | case CK_IntegralRealToComplex: |
| 1478 | case CK_IntegralComplexCast: |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 1479 | case CK_IntegralComplexToFloatingComplex: |
| 1480 | case CK_FloatingComplexToIntegralComplex: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1481 | case CK_ConstructorConversion: |
John McCall | 61ad0e6 | 2010-11-16 06:21:14 +0000 | [diff] [blame] | 1482 | case CK_ToUnion: |
| 1483 | llvm_unreachable("scalar cast to non-scalar value"); |
John McCall | f6a1648 | 2010-12-04 03:47:34 +0000 | [diff] [blame] | 1484 | |
John McCall | 0ae287a | 2010-12-01 04:43:34 +0000 | [diff] [blame] | 1485 | case CK_LValueToRValue: |
| 1486 | assert(CGF.getContext().hasSameUnqualifiedType(E->getType(), DestTy)); |
John McCall | f6a1648 | 2010-12-04 03:47:34 +0000 | [diff] [blame] | 1487 | assert(E->isGLValue() && "lvalue-to-rvalue applied to r-value!"); |
John McCall | 0ae287a | 2010-12-01 04:43:34 +0000 | [diff] [blame] | 1488 | return Visit(const_cast<Expr*>(E)); |
Eli Friedman | 8c3e7e7 | 2009-11-27 02:07:44 +0000 | [diff] [blame] | 1489 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1490 | case CK_IntegralToPointer: { |
Anders Carlsson | 7f9e646 | 2009-09-15 04:48:33 +0000 | [diff] [blame] | 1491 | Value *Src = Visit(const_cast<Expr*>(E)); |
Daniel Dunbar | 89f176d | 2010-08-25 03:32:38 +0000 | [diff] [blame] | 1492 | |
Anders Carlsson | 82debc7 | 2009-10-18 18:12:03 +0000 | [diff] [blame] | 1493 | // First, convert to the correct width so that we control the kind of |
| 1494 | // extension. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1495 | llvm::Type *MiddleTy = CGF.IntPtrTy; |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 1496 | bool InputSigned = E->getType()->isSignedIntegerOrEnumerationType(); |
Anders Carlsson | 82debc7 | 2009-10-18 18:12:03 +0000 | [diff] [blame] | 1497 | llvm::Value* IntResult = |
| 1498 | Builder.CreateIntCast(Src, MiddleTy, InputSigned, "conv"); |
Daniel Dunbar | 89f176d | 2010-08-25 03:32:38 +0000 | [diff] [blame] | 1499 | |
Anders Carlsson | 82debc7 | 2009-10-18 18:12:03 +0000 | [diff] [blame] | 1500 | return Builder.CreateIntToPtr(IntResult, ConvertType(DestTy)); |
Anders Carlsson | 7f9e646 | 2009-09-15 04:48:33 +0000 | [diff] [blame] | 1501 | } |
Eli Friedman | 6594942 | 2011-06-25 02:58:47 +0000 | [diff] [blame] | 1502 | case CK_PointerToIntegral: |
| 1503 | assert(!DestTy->isBooleanType() && "bool should use PointerToBool"); |
| 1504 | return Builder.CreatePtrToInt(Visit(E), ConvertType(DestTy)); |
Daniel Dunbar | 89f176d | 2010-08-25 03:32:38 +0000 | [diff] [blame] | 1505 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1506 | case CK_ToVoid: { |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 1507 | CGF.EmitIgnoredExpr(E); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1508 | return nullptr; |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1509 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1510 | case CK_VectorSplat: { |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1511 | llvm::Type *DstTy = ConvertType(DestTy); |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1512 | Value *Elt = Visit(const_cast<Expr*>(E)); |
Craig Topper | 5fa5608 | 2012-02-06 05:05:50 +0000 | [diff] [blame] | 1513 | Elt = EmitScalarConversion(Elt, E->getType(), |
| 1514 | DestTy->getAs<VectorType>()->getElementType()); |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1515 | |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1516 | // Splat the element across to all elements |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1517 | unsigned NumElements = cast<llvm::VectorType>(DstTy)->getNumElements(); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1518 | return Builder.CreateVectorSplat(NumElements, Elt, "splat"); |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1519 | } |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 1520 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1521 | case CK_IntegralCast: |
| 1522 | case CK_IntegralToFloating: |
| 1523 | case CK_FloatingToIntegral: |
| 1524 | case CK_FloatingCast: |
Eli Friedman | d888962 | 2009-11-27 04:41:50 +0000 | [diff] [blame] | 1525 | return EmitScalarConversion(Visit(E), E->getType(), DestTy); |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 1526 | case CK_IntegralToBoolean: |
| 1527 | return EmitIntToBoolConversion(Visit(E)); |
| 1528 | case CK_PointerToBoolean: |
| 1529 | return EmitPointerToBoolConversion(Visit(E)); |
| 1530 | case CK_FloatingToBoolean: |
| 1531 | return EmitFloatToBoolConversion(Visit(E)); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1532 | case CK_MemberPointerToBoolean: { |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 1533 | llvm::Value *MemPtr = Visit(E); |
| 1534 | const MemberPointerType *MPT = E->getType()->getAs<MemberPointerType>(); |
| 1535 | return CGF.CGM.getCXXABI().EmitMemberPointerIsNotNull(CGF, MemPtr, MPT); |
Anders Carlsson | e977624 | 2009-08-24 18:26:39 +0000 | [diff] [blame] | 1536 | } |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 1537 | |
| 1538 | case CK_FloatingComplexToReal: |
| 1539 | case CK_IntegralComplexToReal: |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 1540 | return CGF.EmitComplexExpr(E, false, true).first; |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 1541 | |
| 1542 | case CK_FloatingComplexToBoolean: |
| 1543 | case CK_IntegralComplexToBoolean: { |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 1544 | CodeGenFunction::ComplexPairTy V = CGF.EmitComplexExpr(E); |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 1545 | |
| 1546 | // TODO: kill this function off, inline appropriate case here |
| 1547 | return EmitComplexToScalarConversion(V, E->getType(), DestTy); |
| 1548 | } |
| 1549 | |
Guy Benyei | e6b9d80 | 2013-01-20 12:31:11 +0000 | [diff] [blame] | 1550 | case CK_ZeroToOCLEvent: { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1551 | assert(DestTy->isEventT() && "CK_ZeroToOCLEvent cast on non-event type"); |
Guy Benyei | e6b9d80 | 2013-01-20 12:31:11 +0000 | [diff] [blame] | 1552 | return llvm::Constant::getNullValue(ConvertType(DestTy)); |
| 1553 | } |
| 1554 | |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 1555 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1556 | |
John McCall | 61ad0e6 | 2010-11-16 06:21:14 +0000 | [diff] [blame] | 1557 | llvm_unreachable("unknown scalar cast"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1558 | } |
| 1559 | |
Chris Lattner | 3379320 | 2007-08-31 22:09:40 +0000 | [diff] [blame] | 1560 | Value *ScalarExprEmitter::VisitStmtExpr(const StmtExpr *E) { |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 1561 | CodeGenFunction::StmtExprEvaluation eval(CGF); |
Eli Friedman | 2ac2fa7 | 2013-06-10 22:04:49 +0000 | [diff] [blame] | 1562 | llvm::Value *RetAlloca = CGF.EmitCompoundStmt(*E->getSubStmt(), |
| 1563 | !E->getType()->isVoidType()); |
| 1564 | if (!RetAlloca) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1565 | return nullptr; |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 1566 | return CGF.EmitLoadOfScalar(CGF.MakeAddrLValue(RetAlloca, E->getType()), |
| 1567 | E->getExprLoc()); |
Chris Lattner | 3379320 | 2007-08-31 22:09:40 +0000 | [diff] [blame] | 1568 | } |
| 1569 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1570 | //===----------------------------------------------------------------------===// |
| 1571 | // Unary Operators |
| 1572 | //===----------------------------------------------------------------------===// |
| 1573 | |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1574 | llvm::Value *ScalarExprEmitter:: |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1575 | EmitAddConsiderOverflowBehavior(const UnaryOperator *E, |
| 1576 | llvm::Value *InVal, |
| 1577 | llvm::Value *NextVal, bool IsInc) { |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 1578 | switch (CGF.getLangOpts().getSignedOverflowBehavior()) { |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1579 | case LangOptions::SOB_Defined: |
| 1580 | return Builder.CreateAdd(InVal, NextVal, IsInc ? "inc" : "dec"); |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 1581 | case LangOptions::SOB_Undefined: |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1582 | if (!CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 1583 | return Builder.CreateNSWAdd(InVal, NextVal, IsInc ? "inc" : "dec"); |
| 1584 | // Fall through. |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1585 | case LangOptions::SOB_Trapping: |
| 1586 | BinOpInfo BinOp; |
| 1587 | BinOp.LHS = InVal; |
| 1588 | BinOp.RHS = NextVal; |
| 1589 | BinOp.Ty = E->getType(); |
| 1590 | BinOp.Opcode = BO_Add; |
Benjamin Kramer | ddc5733 | 2012-10-03 20:58:04 +0000 | [diff] [blame] | 1591 | BinOp.FPContractable = false; |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1592 | BinOp.E = E; |
| 1593 | return EmitOverflowCheckedBinOp(BinOp); |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1594 | } |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1595 | llvm_unreachable("Unknown SignedOverflowBehaviorTy"); |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1596 | } |
| 1597 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1598 | llvm::Value * |
| 1599 | ScalarExprEmitter::EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV, |
| 1600 | bool isInc, bool isPre) { |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1601 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1602 | QualType type = E->getSubExpr()->getType(); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1603 | llvm::PHINode *atomicPHI = nullptr; |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1604 | llvm::Value *value; |
| 1605 | llvm::Value *input; |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1606 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1607 | int amount = (isInc ? 1 : -1); |
| 1608 | |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1609 | if (const AtomicType *atomicTy = type->getAs<AtomicType>()) { |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1610 | type = atomicTy->getValueType(); |
| 1611 | if (isInc && type->isBooleanType()) { |
| 1612 | llvm::Value *True = CGF.EmitToMemory(Builder.getTrue(), type); |
| 1613 | if (isPre) { |
| 1614 | Builder.Insert(new llvm::StoreInst(True, |
| 1615 | LV.getAddress(), LV.isVolatileQualified(), |
| 1616 | LV.getAlignment().getQuantity(), |
| 1617 | llvm::SequentiallyConsistent)); |
| 1618 | return Builder.getTrue(); |
| 1619 | } |
| 1620 | // For atomic bool increment, we just store true and return it for |
| 1621 | // preincrement, do an atomic swap with true for postincrement |
| 1622 | return Builder.CreateAtomicRMW(llvm::AtomicRMWInst::Xchg, |
| 1623 | LV.getAddress(), True, llvm::SequentiallyConsistent); |
| 1624 | } |
| 1625 | // Special case for atomic increment / decrement on integers, emit |
| 1626 | // atomicrmw instructions. We skip this if we want to be doing overflow |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1627 | // checking, and fall into the slow path with the atomic cmpxchg loop. |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1628 | if (!type->isBooleanType() && type->isIntegerType() && |
| 1629 | !(type->isUnsignedIntegerType() && |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1630 | CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) && |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1631 | CGF.getLangOpts().getSignedOverflowBehavior() != |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1632 | LangOptions::SOB_Trapping) { |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1633 | llvm::AtomicRMWInst::BinOp aop = isInc ? llvm::AtomicRMWInst::Add : |
| 1634 | llvm::AtomicRMWInst::Sub; |
| 1635 | llvm::Instruction::BinaryOps op = isInc ? llvm::Instruction::Add : |
| 1636 | llvm::Instruction::Sub; |
| 1637 | llvm::Value *amt = CGF.EmitToMemory( |
| 1638 | llvm::ConstantInt::get(ConvertType(type), 1, true), type); |
| 1639 | llvm::Value *old = Builder.CreateAtomicRMW(aop, |
| 1640 | LV.getAddress(), amt, llvm::SequentiallyConsistent); |
| 1641 | return isPre ? Builder.CreateBinOp(op, old, amt) : old; |
| 1642 | } |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 1643 | value = EmitLoadOfLValue(LV, E->getExprLoc()); |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1644 | input = value; |
| 1645 | // For every other atomic operation, we need to emit a load-op-cmpxchg loop |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1646 | llvm::BasicBlock *startBB = Builder.GetInsertBlock(); |
| 1647 | llvm::BasicBlock *opBB = CGF.createBasicBlock("atomic_op", CGF.CurFn); |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1648 | value = CGF.EmitToMemory(value, type); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1649 | Builder.CreateBr(opBB); |
| 1650 | Builder.SetInsertPoint(opBB); |
| 1651 | atomicPHI = Builder.CreatePHI(value->getType(), 2); |
| 1652 | atomicPHI->addIncoming(value, startBB); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1653 | value = atomicPHI; |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1654 | } else { |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 1655 | value = EmitLoadOfLValue(LV, E->getExprLoc()); |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1656 | input = value; |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1657 | } |
| 1658 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1659 | // Special case of integer increment that we have to check first: bool++. |
| 1660 | // Due to promotion rules, we get: |
| 1661 | // bool++ -> bool = bool + 1 |
| 1662 | // -> bool = (int)bool + 1 |
| 1663 | // -> bool = ((int)bool + 1 != 0) |
| 1664 | // An interesting aspect of this is that increment is always true. |
| 1665 | // Decrement does not have this property. |
| 1666 | if (isInc && type->isBooleanType()) { |
| 1667 | value = Builder.getTrue(); |
| 1668 | |
| 1669 | // Most common case by far: integer increment. |
| 1670 | } else if (type->isIntegerType()) { |
| 1671 | |
Michael Liao | 36d5cea | 2012-08-28 16:55:13 +0000 | [diff] [blame] | 1672 | llvm::Value *amt = llvm::ConstantInt::get(value->getType(), amount, true); |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1673 | |
Eli Friedman | fa0b409 | 2011-03-02 01:49:12 +0000 | [diff] [blame] | 1674 | // Note that signed integer inc/dec with width less than int can't |
| 1675 | // overflow because of promotion rules; we're just eliding a few steps here. |
Stephen Hines | c568f1e | 2014-07-21 00:47:37 -0700 | [diff] [blame] | 1676 | bool CanOverflow = value->getType()->getIntegerBitWidth() >= |
| 1677 | CGF.IntTy->getIntegerBitWidth(); |
| 1678 | if (CanOverflow && type->isSignedIntegerOrEnumerationType()) { |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1679 | value = EmitAddConsiderOverflowBehavior(E, value, amt, isInc); |
Stephen Hines | c568f1e | 2014-07-21 00:47:37 -0700 | [diff] [blame] | 1680 | } else if (CanOverflow && type->isUnsignedIntegerType() && |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1681 | CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) { |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 1682 | BinOpInfo BinOp; |
| 1683 | BinOp.LHS = value; |
| 1684 | BinOp.RHS = llvm::ConstantInt::get(value->getType(), 1, false); |
| 1685 | BinOp.Ty = E->getType(); |
| 1686 | BinOp.Opcode = isInc ? BO_Add : BO_Sub; |
| 1687 | BinOp.FPContractable = false; |
| 1688 | BinOp.E = E; |
| 1689 | value = EmitOverflowCheckedBinOp(BinOp); |
| 1690 | } else |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1691 | value = Builder.CreateAdd(value, amt, isInc ? "inc" : "dec"); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1692 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1693 | // Next most common: pointer increment. |
| 1694 | } else if (const PointerType *ptr = type->getAs<PointerType>()) { |
| 1695 | QualType type = ptr->getPointeeType(); |
| 1696 | |
| 1697 | // VLA types don't have constant size. |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 1698 | if (const VariableArrayType *vla |
| 1699 | = CGF.getContext().getAsVariableArrayType(type)) { |
| 1700 | llvm::Value *numElts = CGF.getVLASize(vla).first; |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1701 | if (!isInc) numElts = Builder.CreateNSWNeg(numElts, "vla.negsize"); |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 1702 | if (CGF.getLangOpts().isSignedOverflowDefined()) |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1703 | value = Builder.CreateGEP(value, numElts, "vla.inc"); |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1704 | else |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1705 | value = Builder.CreateInBoundsGEP(value, numElts, "vla.inc"); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1706 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1707 | // Arithmetic on function pointers (!) is just +-1. |
| 1708 | } else if (type->isFunctionType()) { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1709 | llvm::Value *amt = Builder.getInt32(amount); |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1710 | |
| 1711 | value = CGF.EmitCastToVoidPtr(value); |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 1712 | if (CGF.getLangOpts().isSignedOverflowDefined()) |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1713 | value = Builder.CreateGEP(value, amt, "incdec.funcptr"); |
| 1714 | else |
| 1715 | value = Builder.CreateInBoundsGEP(value, amt, "incdec.funcptr"); |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1716 | value = Builder.CreateBitCast(value, input->getType()); |
| 1717 | |
| 1718 | // For everything else, we can just do a simple increment. |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1719 | } else { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1720 | llvm::Value *amt = Builder.getInt32(amount); |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 1721 | if (CGF.getLangOpts().isSignedOverflowDefined()) |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1722 | value = Builder.CreateGEP(value, amt, "incdec.ptr"); |
| 1723 | else |
| 1724 | value = Builder.CreateInBoundsGEP(value, amt, "incdec.ptr"); |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1725 | } |
| 1726 | |
| 1727 | // Vector increment/decrement. |
| 1728 | } else if (type->isVectorType()) { |
| 1729 | if (type->hasIntegerRepresentation()) { |
| 1730 | llvm::Value *amt = llvm::ConstantInt::get(value->getType(), amount); |
| 1731 | |
Eli Friedman | d4b9ee3 | 2011-05-06 18:04:18 +0000 | [diff] [blame] | 1732 | value = Builder.CreateAdd(value, amt, isInc ? "inc" : "dec"); |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1733 | } else { |
| 1734 | value = Builder.CreateFAdd( |
| 1735 | value, |
| 1736 | llvm::ConstantFP::get(value->getType(), amount), |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1737 | isInc ? "inc" : "dec"); |
| 1738 | } |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1739 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1740 | // Floating point. |
| 1741 | } else if (type->isRealFloatingType()) { |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1742 | // Add the inc/dec to the real part. |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1743 | llvm::Value *amt; |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 1744 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1745 | if (type->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType && |
| 1746 | !CGF.getContext().getLangOpts().HalfArgsAndReturns) { |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 1747 | // Another special case: half FP increment should be done via float |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1748 | value = Builder.CreateCall( |
| 1749 | CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_from_fp16, |
| 1750 | CGF.CGM.FloatTy), |
| 1751 | input); |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 1752 | } |
| 1753 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1754 | if (value->getType()->isFloatTy()) |
| 1755 | amt = llvm::ConstantFP::get(VMContext, |
| 1756 | llvm::APFloat(static_cast<float>(amount))); |
| 1757 | else if (value->getType()->isDoubleTy()) |
| 1758 | amt = llvm::ConstantFP::get(VMContext, |
| 1759 | llvm::APFloat(static_cast<double>(amount))); |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1760 | else { |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1761 | llvm::APFloat F(static_cast<float>(amount)); |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1762 | bool ignored; |
John McCall | 64aa4b3 | 2013-04-16 22:48:15 +0000 | [diff] [blame] | 1763 | F.convert(CGF.getTarget().getLongDoubleFormat(), |
| 1764 | llvm::APFloat::rmTowardZero, &ignored); |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1765 | amt = llvm::ConstantFP::get(VMContext, F); |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1766 | } |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1767 | value = Builder.CreateFAdd(value, amt, isInc ? "inc" : "dec"); |
| 1768 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1769 | if (type->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType && |
| 1770 | !CGF.getContext().getLangOpts().HalfArgsAndReturns) |
| 1771 | value = Builder.CreateCall( |
| 1772 | CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_to_fp16, |
| 1773 | CGF.CGM.FloatTy), |
| 1774 | value); |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 1775 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1776 | // Objective-C pointer types. |
| 1777 | } else { |
| 1778 | const ObjCObjectPointerType *OPT = type->castAs<ObjCObjectPointerType>(); |
| 1779 | value = CGF.EmitCastToVoidPtr(value); |
| 1780 | |
| 1781 | CharUnits size = CGF.getContext().getTypeSizeInChars(OPT->getObjectType()); |
| 1782 | if (!isInc) size = -size; |
| 1783 | llvm::Value *sizeValue = |
| 1784 | llvm::ConstantInt::get(CGF.SizeTy, size.getQuantity()); |
| 1785 | |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 1786 | if (CGF.getLangOpts().isSignedOverflowDefined()) |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1787 | value = Builder.CreateGEP(value, sizeValue, "incdec.objptr"); |
| 1788 | else |
| 1789 | value = Builder.CreateInBoundsGEP(value, sizeValue, "incdec.objptr"); |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1790 | value = Builder.CreateBitCast(value, input->getType()); |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1791 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1792 | |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1793 | if (atomicPHI) { |
| 1794 | llvm::BasicBlock *opBB = Builder.GetInsertBlock(); |
| 1795 | llvm::BasicBlock *contBB = CGF.createBasicBlock("atomic_cont", CGF.CurFn); |
Stephen Hines | 0e2c34f | 2015-03-23 12:09:02 -0700 | [diff] [blame^] | 1796 | auto Pair = CGF.EmitAtomicCompareExchange( |
| 1797 | LV, RValue::get(atomicPHI), RValue::get(CGF.EmitToMemory(value, type)), |
| 1798 | E->getExprLoc()); |
| 1799 | llvm::Value *old = Pair.first.getScalarVal(); |
| 1800 | llvm::Value *success = Pair.second.getScalarVal(); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1801 | atomicPHI->addIncoming(old, opBB); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1802 | Builder.CreateCondBr(success, contBB, opBB); |
| 1803 | Builder.SetInsertPoint(contBB); |
| 1804 | return isPre ? value : input; |
| 1805 | } |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 1806 | |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1807 | // Store the updated result through the lvalue. |
| 1808 | if (LV.isBitField()) |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 1809 | CGF.EmitStoreThroughBitfieldLValue(RValue::get(value), LV, &value); |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1810 | else |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 1811 | CGF.EmitStoreThroughLValue(RValue::get(value), LV); |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 1812 | |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1813 | // If this is a postinc, return the value read from memory, otherwise use the |
| 1814 | // updated value. |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1815 | return isPre ? value : input; |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1816 | } |
| 1817 | |
| 1818 | |
| 1819 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1820 | Value *ScalarExprEmitter::VisitUnaryMinus(const UnaryOperator *E) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 1821 | TestAndClearIgnoreResultAssign(); |
Chris Lattner | 9a20723 | 2010-06-26 21:48:21 +0000 | [diff] [blame] | 1822 | // Emit unary minus with EmitSub so we handle overflow cases etc. |
| 1823 | BinOpInfo BinOp; |
Chris Lattner | 4ac0d83 | 2010-06-28 17:12:37 +0000 | [diff] [blame] | 1824 | BinOp.RHS = Visit(E->getSubExpr()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1825 | |
Chris Lattner | 4ac0d83 | 2010-06-28 17:12:37 +0000 | [diff] [blame] | 1826 | if (BinOp.RHS->getType()->isFPOrFPVectorTy()) |
| 1827 | BinOp.LHS = llvm::ConstantFP::getZeroValueForNegation(BinOp.RHS->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1828 | else |
Chris Lattner | 4ac0d83 | 2010-06-28 17:12:37 +0000 | [diff] [blame] | 1829 | BinOp.LHS = llvm::Constant::getNullValue(BinOp.RHS->getType()); |
Chris Lattner | 9a20723 | 2010-06-26 21:48:21 +0000 | [diff] [blame] | 1830 | BinOp.Ty = E->getType(); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1831 | BinOp.Opcode = BO_Sub; |
Benjamin Kramer | ddc5733 | 2012-10-03 20:58:04 +0000 | [diff] [blame] | 1832 | BinOp.FPContractable = false; |
Chris Lattner | 9a20723 | 2010-06-26 21:48:21 +0000 | [diff] [blame] | 1833 | BinOp.E = E; |
| 1834 | return EmitSub(BinOp); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1835 | } |
| 1836 | |
| 1837 | Value *ScalarExprEmitter::VisitUnaryNot(const UnaryOperator *E) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 1838 | TestAndClearIgnoreResultAssign(); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1839 | Value *Op = Visit(E->getSubExpr()); |
| 1840 | return Builder.CreateNot(Op, "neg"); |
| 1841 | } |
| 1842 | |
| 1843 | Value *ScalarExprEmitter::VisitUnaryLNot(const UnaryOperator *E) { |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 1844 | // Perform vector logical not on comparison with zero vector. |
| 1845 | if (E->getType()->isExtVectorType()) { |
| 1846 | Value *Oper = Visit(E->getSubExpr()); |
| 1847 | Value *Zero = llvm::Constant::getNullValue(Oper->getType()); |
Joey Gouly | 52e933b | 2013-02-21 11:49:56 +0000 | [diff] [blame] | 1848 | Value *Result; |
| 1849 | if (Oper->getType()->isFPOrFPVectorTy()) |
| 1850 | Result = Builder.CreateFCmp(llvm::CmpInst::FCMP_OEQ, Oper, Zero, "cmp"); |
| 1851 | else |
| 1852 | Result = Builder.CreateICmp(llvm::CmpInst::ICMP_EQ, Oper, Zero, "cmp"); |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 1853 | return Builder.CreateSExt(Result, ConvertType(E->getType()), "sext"); |
| 1854 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1855 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1856 | // Compare operand to zero. |
| 1857 | Value *BoolVal = CGF.EvaluateExprAsBool(E->getSubExpr()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1858 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1859 | // Invert value. |
| 1860 | // TODO: Could dynamically modify easy computations here. For example, if |
| 1861 | // the operand is an icmp ne, turn into icmp eq. |
| 1862 | BoolVal = Builder.CreateNot(BoolVal, "lnot"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1863 | |
Anders Carlsson | 9f84d88 | 2009-05-19 18:44:53 +0000 | [diff] [blame] | 1864 | // ZExt result to the expr type. |
| 1865 | return Builder.CreateZExt(BoolVal, ConvertType(E->getType()), "lnot.ext"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1866 | } |
| 1867 | |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1868 | Value *ScalarExprEmitter::VisitOffsetOfExpr(OffsetOfExpr *E) { |
| 1869 | // Try folding the offsetof to a constant. |
Richard Smith | 80d4b55 | 2011-12-28 19:48:30 +0000 | [diff] [blame] | 1870 | llvm::APSInt Value; |
| 1871 | if (E->EvaluateAsInt(Value, CGF.getContext())) |
| 1872 | return Builder.getInt(Value); |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1873 | |
| 1874 | // Loop over the components of the offsetof to compute the value. |
| 1875 | unsigned n = E->getNumComponents(); |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1876 | llvm::Type* ResultType = ConvertType(E->getType()); |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1877 | llvm::Value* Result = llvm::Constant::getNullValue(ResultType); |
| 1878 | QualType CurrentType = E->getTypeSourceInfo()->getType(); |
| 1879 | for (unsigned i = 0; i != n; ++i) { |
| 1880 | OffsetOfExpr::OffsetOfNode ON = E->getComponent(i); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1881 | llvm::Value *Offset = nullptr; |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1882 | switch (ON.getKind()) { |
| 1883 | case OffsetOfExpr::OffsetOfNode::Array: { |
| 1884 | // Compute the index |
| 1885 | Expr *IdxExpr = E->getIndexExpr(ON.getArrayExprIndex()); |
| 1886 | llvm::Value* Idx = CGF.EmitScalarExpr(IdxExpr); |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 1887 | bool IdxSigned = IdxExpr->getType()->isSignedIntegerOrEnumerationType(); |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1888 | Idx = Builder.CreateIntCast(Idx, ResultType, IdxSigned, "conv"); |
| 1889 | |
| 1890 | // Save the element type |
| 1891 | CurrentType = |
| 1892 | CGF.getContext().getAsArrayType(CurrentType)->getElementType(); |
| 1893 | |
| 1894 | // Compute the element size |
| 1895 | llvm::Value* ElemSize = llvm::ConstantInt::get(ResultType, |
| 1896 | CGF.getContext().getTypeSizeInChars(CurrentType).getQuantity()); |
| 1897 | |
| 1898 | // Multiply out to compute the result |
| 1899 | Offset = Builder.CreateMul(Idx, ElemSize); |
| 1900 | break; |
| 1901 | } |
| 1902 | |
| 1903 | case OffsetOfExpr::OffsetOfNode::Field: { |
| 1904 | FieldDecl *MemberDecl = ON.getField(); |
| 1905 | RecordDecl *RD = CurrentType->getAs<RecordType>()->getDecl(); |
| 1906 | const ASTRecordLayout &RL = CGF.getContext().getASTRecordLayout(RD); |
| 1907 | |
| 1908 | // Compute the index of the field in its parent. |
| 1909 | unsigned i = 0; |
| 1910 | // FIXME: It would be nice if we didn't have to loop here! |
| 1911 | for (RecordDecl::field_iterator Field = RD->field_begin(), |
| 1912 | FieldEnd = RD->field_end(); |
David Blaikie | 262bc18 | 2012-04-30 02:36:29 +0000 | [diff] [blame] | 1913 | Field != FieldEnd; ++Field, ++i) { |
David Blaikie | 581deb3 | 2012-06-06 20:45:41 +0000 | [diff] [blame] | 1914 | if (*Field == MemberDecl) |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1915 | break; |
| 1916 | } |
| 1917 | assert(i < RL.getFieldCount() && "offsetof field in wrong type"); |
| 1918 | |
| 1919 | // Compute the offset to the field |
| 1920 | int64_t OffsetInt = RL.getFieldOffset(i) / |
| 1921 | CGF.getContext().getCharWidth(); |
| 1922 | Offset = llvm::ConstantInt::get(ResultType, OffsetInt); |
| 1923 | |
| 1924 | // Save the element type. |
| 1925 | CurrentType = MemberDecl->getType(); |
| 1926 | break; |
| 1927 | } |
Eli Friedman | 16fd39f | 2010-08-06 16:37:05 +0000 | [diff] [blame] | 1928 | |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1929 | case OffsetOfExpr::OffsetOfNode::Identifier: |
Eli Friedman | 6d4e44b | 2010-08-06 01:17:25 +0000 | [diff] [blame] | 1930 | llvm_unreachable("dependent __builtin_offsetof"); |
Eli Friedman | 16fd39f | 2010-08-06 16:37:05 +0000 | [diff] [blame] | 1931 | |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1932 | case OffsetOfExpr::OffsetOfNode::Base: { |
| 1933 | if (ON.getBase()->isVirtual()) { |
| 1934 | CGF.ErrorUnsupported(E, "virtual base in offsetof"); |
| 1935 | continue; |
| 1936 | } |
| 1937 | |
| 1938 | RecordDecl *RD = CurrentType->getAs<RecordType>()->getDecl(); |
| 1939 | const ASTRecordLayout &RL = CGF.getContext().getASTRecordLayout(RD); |
| 1940 | |
| 1941 | // Save the element type. |
| 1942 | CurrentType = ON.getBase()->getType(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1943 | |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1944 | // Compute the offset to the base. |
| 1945 | const RecordType *BaseRT = CurrentType->getAs<RecordType>(); |
| 1946 | CXXRecordDecl *BaseRD = cast<CXXRecordDecl>(BaseRT->getDecl()); |
Benjamin Kramer | d4f5198 | 2012-07-04 18:45:14 +0000 | [diff] [blame] | 1947 | CharUnits OffsetInt = RL.getBaseClassOffset(BaseRD); |
| 1948 | Offset = llvm::ConstantInt::get(ResultType, OffsetInt.getQuantity()); |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1949 | break; |
| 1950 | } |
| 1951 | } |
| 1952 | Result = Builder.CreateAdd(Result, Offset); |
| 1953 | } |
| 1954 | return Result; |
Douglas Gregor | 8ecdb65 | 2010-04-28 22:16:22 +0000 | [diff] [blame] | 1955 | } |
| 1956 | |
Peter Collingbourne | f4e3cfb | 2011-03-11 19:24:49 +0000 | [diff] [blame] | 1957 | /// VisitUnaryExprOrTypeTraitExpr - Return the size or alignment of the type of |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 1958 | /// argument of the sizeof expression as an integer. |
| 1959 | Value * |
Peter Collingbourne | f4e3cfb | 2011-03-11 19:24:49 +0000 | [diff] [blame] | 1960 | ScalarExprEmitter::VisitUnaryExprOrTypeTraitExpr( |
| 1961 | const UnaryExprOrTypeTraitExpr *E) { |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 1962 | QualType TypeToSize = E->getTypeOfArgument(); |
Peter Collingbourne | f4e3cfb | 2011-03-11 19:24:49 +0000 | [diff] [blame] | 1963 | if (E->getKind() == UETT_SizeOf) { |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1964 | if (const VariableArrayType *VAT = |
Eli Friedman | f2da9df | 2009-01-24 22:19:05 +0000 | [diff] [blame] | 1965 | CGF.getContext().getAsVariableArrayType(TypeToSize)) { |
| 1966 | if (E->isArgumentType()) { |
| 1967 | // sizeof(type) - make sure to emit the VLA size. |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1968 | CGF.EmitVariablyModifiedType(TypeToSize); |
Eli Friedman | 8f426fa | 2009-04-20 03:21:44 +0000 | [diff] [blame] | 1969 | } else { |
| 1970 | // C99 6.5.3.4p2: If the argument is an expression of type |
| 1971 | // VLA, it is evaluated. |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 1972 | CGF.EmitIgnoredExpr(E->getArgumentExpr()); |
Eli Friedman | f2da9df | 2009-01-24 22:19:05 +0000 | [diff] [blame] | 1973 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1974 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1975 | QualType eltType; |
| 1976 | llvm::Value *numElts; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1977 | std::tie(numElts, eltType) = CGF.getVLASize(VAT); |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1978 | |
| 1979 | llvm::Value *size = numElts; |
| 1980 | |
| 1981 | // Scale the number of non-VLA elements by the non-VLA element size. |
| 1982 | CharUnits eltSize = CGF.getContext().getTypeSizeInChars(eltType); |
| 1983 | if (!eltSize.isOne()) |
| 1984 | size = CGF.Builder.CreateNUWMul(CGF.CGM.getSize(eltSize), numElts); |
| 1985 | |
| 1986 | return size; |
Anders Carlsson | b50525b | 2008-12-21 03:33:21 +0000 | [diff] [blame] | 1987 | } |
Anders Carlsson | 5d46315 | 2008-12-12 07:38:43 +0000 | [diff] [blame] | 1988 | } |
Eli Friedman | f2da9df | 2009-01-24 22:19:05 +0000 | [diff] [blame] | 1989 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1990 | // If this isn't sizeof(vla), the result must be constant; use the constant |
| 1991 | // folding logic so we don't have to duplicate it here. |
Richard Smith | 80d4b55 | 2011-12-28 19:48:30 +0000 | [diff] [blame] | 1992 | return Builder.getInt(E->EvaluateKnownConstInt(CGF.getContext())); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1993 | } |
| 1994 | |
Chris Lattner | 46f93d0 | 2007-08-24 21:20:17 +0000 | [diff] [blame] | 1995 | Value *ScalarExprEmitter::VisitUnaryReal(const UnaryOperator *E) { |
| 1996 | Expr *Op = E->getSubExpr(); |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 1997 | if (Op->getType()->isAnyComplexType()) { |
| 1998 | // If it's an l-value, load through the appropriate subobject l-value. |
| 1999 | // Note that we have to ask E because Op might be an l-value that |
| 2000 | // this won't work for, e.g. an Obj-C property. |
John McCall | 7eb0a9e | 2010-11-24 05:12:34 +0000 | [diff] [blame] | 2001 | if (E->isGLValue()) |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 2002 | return CGF.EmitLoadOfLValue(CGF.EmitLValue(E), |
| 2003 | E->getExprLoc()).getScalarVal(); |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2004 | |
| 2005 | // Otherwise, calculate and project. |
| 2006 | return CGF.EmitComplexExpr(Op, false, true).first; |
| 2007 | } |
| 2008 | |
Chris Lattner | 46f93d0 | 2007-08-24 21:20:17 +0000 | [diff] [blame] | 2009 | return Visit(Op); |
| 2010 | } |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2011 | |
Chris Lattner | 46f93d0 | 2007-08-24 21:20:17 +0000 | [diff] [blame] | 2012 | Value *ScalarExprEmitter::VisitUnaryImag(const UnaryOperator *E) { |
| 2013 | Expr *Op = E->getSubExpr(); |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2014 | if (Op->getType()->isAnyComplexType()) { |
| 2015 | // If it's an l-value, load through the appropriate subobject l-value. |
| 2016 | // Note that we have to ask E because Op might be an l-value that |
| 2017 | // this won't work for, e.g. an Obj-C property. |
John McCall | 7eb0a9e | 2010-11-24 05:12:34 +0000 | [diff] [blame] | 2018 | if (Op->isGLValue()) |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 2019 | return CGF.EmitLoadOfLValue(CGF.EmitLValue(E), |
| 2020 | E->getExprLoc()).getScalarVal(); |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2021 | |
| 2022 | // Otherwise, calculate and project. |
| 2023 | return CGF.EmitComplexExpr(Op, true, false).second; |
| 2024 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2025 | |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 2026 | // __imag on a scalar returns zero. Emit the subexpr to ensure side |
| 2027 | // effects are evaluated, but not the actual value. |
Richard Smith | dfb80de | 2012-02-18 20:53:32 +0000 | [diff] [blame] | 2028 | if (Op->isGLValue()) |
| 2029 | CGF.EmitLValue(Op); |
| 2030 | else |
| 2031 | CGF.EmitScalarExpr(Op, true); |
Owen Anderson | c9c88b4 | 2009-07-31 20:28:54 +0000 | [diff] [blame] | 2032 | return llvm::Constant::getNullValue(ConvertType(E->getType())); |
Chris Lattner | 46f93d0 | 2007-08-24 21:20:17 +0000 | [diff] [blame] | 2033 | } |
| 2034 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2035 | //===----------------------------------------------------------------------===// |
| 2036 | // Binary Operators |
| 2037 | //===----------------------------------------------------------------------===// |
| 2038 | |
| 2039 | BinOpInfo ScalarExprEmitter::EmitBinOps(const BinaryOperator *E) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 2040 | TestAndClearIgnoreResultAssign(); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2041 | BinOpInfo Result; |
| 2042 | Result.LHS = Visit(E->getLHS()); |
| 2043 | Result.RHS = Visit(E->getRHS()); |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 2044 | Result.Ty = E->getType(); |
Chris Lattner | 9a20723 | 2010-06-26 21:48:21 +0000 | [diff] [blame] | 2045 | Result.Opcode = E->getOpcode(); |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2046 | Result.FPContractable = E->isFPContractable(); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2047 | Result.E = E; |
| 2048 | return Result; |
| 2049 | } |
| 2050 | |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 2051 | LValue ScalarExprEmitter::EmitCompoundAssignLValue( |
| 2052 | const CompoundAssignOperator *E, |
| 2053 | Value *(ScalarExprEmitter::*Func)(const BinOpInfo &), |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2054 | Value *&Result) { |
Benjamin Kramer | 54d76db | 2009-12-25 15:43:36 +0000 | [diff] [blame] | 2055 | QualType LHSTy = E->getLHS()->getType(); |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 2056 | BinOpInfo OpInfo; |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2057 | |
Eli Friedman | 0934e18 | 2013-06-12 01:40:06 +0000 | [diff] [blame] | 2058 | if (E->getComputationResultType()->isAnyComplexType()) |
Stephen Hines | 0e2c34f | 2015-03-23 12:09:02 -0700 | [diff] [blame^] | 2059 | return CGF.EmitScalarCompoundAssignWithComplex(E, Result); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2060 | |
Mike Stump | cc0442f | 2009-05-22 19:07:20 +0000 | [diff] [blame] | 2061 | // Emit the RHS first. __block variables need to have the rhs evaluated |
| 2062 | // first, plus this should improve codegen a little. |
| 2063 | OpInfo.RHS = Visit(E->getRHS()); |
| 2064 | OpInfo.Ty = E->getComputationResultType(); |
Chris Lattner | 9a20723 | 2010-06-26 21:48:21 +0000 | [diff] [blame] | 2065 | OpInfo.Opcode = E->getOpcode(); |
Benjamin Kramer | ddc5733 | 2012-10-03 20:58:04 +0000 | [diff] [blame] | 2066 | OpInfo.FPContractable = false; |
Mike Stump | cc0442f | 2009-05-22 19:07:20 +0000 | [diff] [blame] | 2067 | OpInfo.E = E; |
Eli Friedman | ab3a852 | 2009-03-28 01:22:36 +0000 | [diff] [blame] | 2068 | // Load/convert the LHS. |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2069 | LValue LHSLV = EmitCheckedLValue(E->getLHS(), CodeGenFunction::TCK_Store); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 2070 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2071 | llvm::PHINode *atomicPHI = nullptr; |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 2072 | if (const AtomicType *atomicTy = LHSTy->getAs<AtomicType>()) { |
| 2073 | QualType type = atomicTy->getValueType(); |
| 2074 | if (!type->isBooleanType() && type->isIntegerType() && |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2075 | !(type->isUnsignedIntegerType() && |
| 2076 | CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) && |
| 2077 | CGF.getLangOpts().getSignedOverflowBehavior() != |
| 2078 | LangOptions::SOB_Trapping) { |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 2079 | llvm::AtomicRMWInst::BinOp aop = llvm::AtomicRMWInst::BAD_BINOP; |
| 2080 | switch (OpInfo.Opcode) { |
| 2081 | // We don't have atomicrmw operands for *, %, /, <<, >> |
| 2082 | case BO_MulAssign: case BO_DivAssign: |
| 2083 | case BO_RemAssign: |
| 2084 | case BO_ShlAssign: |
| 2085 | case BO_ShrAssign: |
| 2086 | break; |
| 2087 | case BO_AddAssign: |
| 2088 | aop = llvm::AtomicRMWInst::Add; |
| 2089 | break; |
| 2090 | case BO_SubAssign: |
| 2091 | aop = llvm::AtomicRMWInst::Sub; |
| 2092 | break; |
| 2093 | case BO_AndAssign: |
| 2094 | aop = llvm::AtomicRMWInst::And; |
| 2095 | break; |
| 2096 | case BO_XorAssign: |
| 2097 | aop = llvm::AtomicRMWInst::Xor; |
| 2098 | break; |
| 2099 | case BO_OrAssign: |
| 2100 | aop = llvm::AtomicRMWInst::Or; |
| 2101 | break; |
| 2102 | default: |
| 2103 | llvm_unreachable("Invalid compound assignment type"); |
| 2104 | } |
| 2105 | if (aop != llvm::AtomicRMWInst::BAD_BINOP) { |
| 2106 | llvm::Value *amt = CGF.EmitToMemory(EmitScalarConversion(OpInfo.RHS, |
| 2107 | E->getRHS()->getType(), LHSTy), LHSTy); |
| 2108 | Builder.CreateAtomicRMW(aop, LHSLV.getAddress(), amt, |
| 2109 | llvm::SequentiallyConsistent); |
| 2110 | return LHSLV; |
| 2111 | } |
| 2112 | } |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 2113 | // FIXME: For floating point types, we should be saving and restoring the |
| 2114 | // floating point environment in the loop. |
| 2115 | llvm::BasicBlock *startBB = Builder.GetInsertBlock(); |
| 2116 | llvm::BasicBlock *opBB = CGF.createBasicBlock("atomic_op", CGF.CurFn); |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 2117 | OpInfo.LHS = EmitLoadOfLValue(LHSLV, E->getExprLoc()); |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 2118 | OpInfo.LHS = CGF.EmitToMemory(OpInfo.LHS, type); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 2119 | Builder.CreateBr(opBB); |
| 2120 | Builder.SetInsertPoint(opBB); |
| 2121 | atomicPHI = Builder.CreatePHI(OpInfo.LHS->getType(), 2); |
| 2122 | atomicPHI->addIncoming(OpInfo.LHS, startBB); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 2123 | OpInfo.LHS = atomicPHI; |
| 2124 | } |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 2125 | else |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 2126 | OpInfo.LHS = EmitLoadOfLValue(LHSLV, E->getExprLoc()); |
Eli Friedman | 860a319 | 2012-06-16 02:19:17 +0000 | [diff] [blame] | 2127 | |
| 2128 | OpInfo.LHS = EmitScalarConversion(OpInfo.LHS, LHSTy, |
| 2129 | E->getComputationLHSType()); |
| 2130 | |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 2131 | // Expand the binary operator. |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2132 | Result = (this->*Func)(OpInfo); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2133 | |
Daniel Dunbar | 8c6f57c | 2008-08-06 02:00:38 +0000 | [diff] [blame] | 2134 | // Convert the result back to the LHS type. |
Eli Friedman | ab3a852 | 2009-03-28 01:22:36 +0000 | [diff] [blame] | 2135 | Result = EmitScalarConversion(Result, E->getComputationResultType(), LHSTy); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 2136 | |
| 2137 | if (atomicPHI) { |
| 2138 | llvm::BasicBlock *opBB = Builder.GetInsertBlock(); |
| 2139 | llvm::BasicBlock *contBB = CGF.createBasicBlock("atomic_cont", CGF.CurFn); |
Stephen Hines | 0e2c34f | 2015-03-23 12:09:02 -0700 | [diff] [blame^] | 2140 | auto Pair = CGF.EmitAtomicCompareExchange( |
| 2141 | LHSLV, RValue::get(atomicPHI), |
| 2142 | RValue::get(CGF.EmitToMemory(Result, LHSTy)), E->getExprLoc()); |
| 2143 | llvm::Value *old = Pair.first.getScalarVal(); |
| 2144 | llvm::Value *success = Pair.second.getScalarVal(); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 2145 | atomicPHI->addIncoming(old, opBB); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 2146 | Builder.CreateCondBr(success, contBB, opBB); |
| 2147 | Builder.SetInsertPoint(contBB); |
| 2148 | return LHSLV; |
| 2149 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2150 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2151 | // Store the result value into the LHS lvalue. Bit-fields are handled |
| 2152 | // specially because the result is altered by the store, i.e., [C99 6.5.16p1] |
| 2153 | // 'An assignment expression has the value of the left operand after the |
| 2154 | // assignment...'. |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2155 | if (LHSLV.isBitField()) |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 2156 | CGF.EmitStoreThroughBitfieldLValue(RValue::get(Result), LHSLV, &Result); |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2157 | else |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 2158 | CGF.EmitStoreThroughLValue(RValue::get(Result), LHSLV); |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2159 | |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 2160 | return LHSLV; |
| 2161 | } |
| 2162 | |
| 2163 | Value *ScalarExprEmitter::EmitCompoundAssign(const CompoundAssignOperator *E, |
| 2164 | Value *(ScalarExprEmitter::*Func)(const BinOpInfo &)) { |
| 2165 | bool Ignore = TestAndClearIgnoreResultAssign(); |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2166 | Value *RHS; |
| 2167 | LValue LHS = EmitCompoundAssignLValue(E, Func, RHS); |
| 2168 | |
| 2169 | // If the result is clearly ignored, return now. |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 2170 | if (Ignore) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2171 | return nullptr; |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2172 | |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2173 | // The result of an assignment in C is the assigned r-value. |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 2174 | if (!CGF.getLangOpts().CPlusPlus) |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2175 | return RHS; |
| 2176 | |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2177 | // If the lvalue is non-volatile, return the computed value of the assignment. |
| 2178 | if (!LHS.isVolatileQualified()) |
| 2179 | return RHS; |
| 2180 | |
| 2181 | // Otherwise, reload the value. |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 2182 | return EmitLoadOfLValue(LHS, E->getExprLoc()); |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 2183 | } |
| 2184 | |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2185 | void ScalarExprEmitter::EmitUndefinedBehaviorIntegerDivAndRemCheck( |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2186 | const BinOpInfo &Ops, llvm::Value *Zero, bool isDiv) { |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2187 | SmallVector<std::pair<llvm::Value *, SanitizerKind>, 2> Checks; |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2188 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2189 | if (CGF.SanOpts.has(SanitizerKind::IntegerDivideByZero)) { |
| 2190 | Checks.push_back(std::make_pair(Builder.CreateICmpNE(Ops.RHS, Zero), |
| 2191 | SanitizerKind::IntegerDivideByZero)); |
| 2192 | } |
Richard Smith | c54e25f | 2012-11-06 02:30:30 +0000 | [diff] [blame] | 2193 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2194 | if (CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow) && |
Richard Smith | c54e25f | 2012-11-06 02:30:30 +0000 | [diff] [blame] | 2195 | Ops.Ty->hasSignedIntegerRepresentation()) { |
| 2196 | llvm::IntegerType *Ty = cast<llvm::IntegerType>(Zero->getType()); |
| 2197 | |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2198 | llvm::Value *IntMin = |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 2199 | Builder.getInt(llvm::APInt::getSignedMinValue(Ty->getBitWidth())); |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2200 | llvm::Value *NegOne = llvm::ConstantInt::get(Ty, -1ULL); |
| 2201 | |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2202 | llvm::Value *LHSCmp = Builder.CreateICmpNE(Ops.LHS, IntMin); |
| 2203 | llvm::Value *RHSCmp = Builder.CreateICmpNE(Ops.RHS, NegOne); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2204 | llvm::Value *NotOverflow = Builder.CreateOr(LHSCmp, RHSCmp, "or"); |
| 2205 | Checks.push_back( |
| 2206 | std::make_pair(NotOverflow, SanitizerKind::SignedIntegerOverflow)); |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2207 | } |
Richard Smith | c54e25f | 2012-11-06 02:30:30 +0000 | [diff] [blame] | 2208 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2209 | if (Checks.size() > 0) |
| 2210 | EmitBinOpCheck(Checks, Ops); |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2211 | } |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 2212 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2213 | Value *ScalarExprEmitter::EmitDiv(const BinOpInfo &Ops) { |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2214 | { |
| 2215 | CodeGenFunction::SanitizerScope SanScope(&CGF); |
| 2216 | if ((CGF.SanOpts.has(SanitizerKind::IntegerDivideByZero) || |
| 2217 | CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) && |
| 2218 | Ops.Ty->isIntegerType()) { |
| 2219 | llvm::Value *Zero = llvm::Constant::getNullValue(ConvertType(Ops.Ty)); |
| 2220 | EmitUndefinedBehaviorIntegerDivAndRemCheck(Ops, Zero, true); |
| 2221 | } else if (CGF.SanOpts.has(SanitizerKind::FloatDivideByZero) && |
| 2222 | Ops.Ty->isRealFloatingType()) { |
| 2223 | llvm::Value *Zero = llvm::Constant::getNullValue(ConvertType(Ops.Ty)); |
| 2224 | llvm::Value *NonZero = Builder.CreateFCmpUNE(Ops.RHS, Zero); |
| 2225 | EmitBinOpCheck(std::make_pair(NonZero, SanitizerKind::FloatDivideByZero), |
| 2226 | Ops); |
| 2227 | } |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2228 | } |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2229 | |
Peter Collingbourne | c5096cb | 2011-10-27 19:19:51 +0000 | [diff] [blame] | 2230 | if (Ops.LHS->getType()->isFPOrFPVectorTy()) { |
| 2231 | llvm::Value *Val = Builder.CreateFDiv(Ops.LHS, Ops.RHS, "div"); |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 2232 | if (CGF.getLangOpts().OpenCL) { |
Peter Collingbourne | c5096cb | 2011-10-27 19:19:51 +0000 | [diff] [blame] | 2233 | // OpenCL 1.1 7.4: minimum accuracy of single precision / is 2.5ulp |
| 2234 | llvm::Type *ValTy = Val->getType(); |
| 2235 | if (ValTy->isFloatTy() || |
| 2236 | (isa<llvm::VectorType>(ValTy) && |
| 2237 | cast<llvm::VectorType>(ValTy)->getElementType()->isFloatTy())) |
Duncan Sands | 8250016 | 2012-04-10 08:23:07 +0000 | [diff] [blame] | 2238 | CGF.SetFPAccuracy(Val, 2.5); |
Peter Collingbourne | c5096cb | 2011-10-27 19:19:51 +0000 | [diff] [blame] | 2239 | } |
| 2240 | return Val; |
| 2241 | } |
Douglas Gregor | f609462 | 2010-07-23 15:58:24 +0000 | [diff] [blame] | 2242 | else if (Ops.Ty->hasUnsignedIntegerRepresentation()) |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2243 | return Builder.CreateUDiv(Ops.LHS, Ops.RHS, "div"); |
| 2244 | else |
| 2245 | return Builder.CreateSDiv(Ops.LHS, Ops.RHS, "div"); |
| 2246 | } |
| 2247 | |
| 2248 | Value *ScalarExprEmitter::EmitRem(const BinOpInfo &Ops) { |
| 2249 | // Rem in C can't be a floating point type: C99 6.5.5p2. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2250 | if (CGF.SanOpts.has(SanitizerKind::IntegerDivideByZero)) { |
| 2251 | CodeGenFunction::SanitizerScope SanScope(&CGF); |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2252 | llvm::Value *Zero = llvm::Constant::getNullValue(ConvertType(Ops.Ty)); |
| 2253 | |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2254 | if (Ops.Ty->isIntegerType()) |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2255 | EmitUndefinedBehaviorIntegerDivAndRemCheck(Ops, Zero, false); |
| 2256 | } |
| 2257 | |
Eli Friedman | 52d6874 | 2011-04-10 04:44:11 +0000 | [diff] [blame] | 2258 | if (Ops.Ty->hasUnsignedIntegerRepresentation()) |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2259 | return Builder.CreateURem(Ops.LHS, Ops.RHS, "rem"); |
| 2260 | else |
| 2261 | return Builder.CreateSRem(Ops.LHS, Ops.RHS, "rem"); |
| 2262 | } |
| 2263 | |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2264 | Value *ScalarExprEmitter::EmitOverflowCheckedBinOp(const BinOpInfo &Ops) { |
| 2265 | unsigned IID; |
| 2266 | unsigned OpID = 0; |
Mike Stump | 5d8b2cf | 2009-04-02 01:03:55 +0000 | [diff] [blame] | 2267 | |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2268 | bool isSigned = Ops.Ty->isSignedIntegerOrEnumerationType(); |
Chris Lattner | 9a20723 | 2010-06-26 21:48:21 +0000 | [diff] [blame] | 2269 | switch (Ops.Opcode) { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2270 | case BO_Add: |
| 2271 | case BO_AddAssign: |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2272 | OpID = 1; |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2273 | IID = isSigned ? llvm::Intrinsic::sadd_with_overflow : |
| 2274 | llvm::Intrinsic::uadd_with_overflow; |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2275 | break; |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2276 | case BO_Sub: |
| 2277 | case BO_SubAssign: |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2278 | OpID = 2; |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2279 | IID = isSigned ? llvm::Intrinsic::ssub_with_overflow : |
| 2280 | llvm::Intrinsic::usub_with_overflow; |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2281 | break; |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2282 | case BO_Mul: |
| 2283 | case BO_MulAssign: |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2284 | OpID = 3; |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2285 | IID = isSigned ? llvm::Intrinsic::smul_with_overflow : |
| 2286 | llvm::Intrinsic::umul_with_overflow; |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2287 | break; |
| 2288 | default: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 2289 | llvm_unreachable("Unsupported operation for overflow detection"); |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2290 | } |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2291 | OpID <<= 1; |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2292 | if (isSigned) |
| 2293 | OpID |= 1; |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2294 | |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 2295 | llvm::Type *opTy = CGF.CGM.getTypes().ConvertType(Ops.Ty); |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2296 | |
Benjamin Kramer | 8dd55a3 | 2011-07-14 17:45:50 +0000 | [diff] [blame] | 2297 | llvm::Function *intrinsic = CGF.CGM.getIntrinsic(IID, opTy); |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2298 | |
| 2299 | Value *resultAndOverflow = Builder.CreateCall2(intrinsic, Ops.LHS, Ops.RHS); |
| 2300 | Value *result = Builder.CreateExtractValue(resultAndOverflow, 0); |
| 2301 | Value *overflow = Builder.CreateExtractValue(resultAndOverflow, 1); |
| 2302 | |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2303 | // Handle overflow with llvm.trap if no custom handler has been specified. |
| 2304 | const std::string *handlerName = |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 2305 | &CGF.getLangOpts().OverflowHandler; |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2306 | if (handlerName->empty()) { |
Richard Smith | d6396a6 | 2012-11-05 22:21:05 +0000 | [diff] [blame] | 2307 | // If the signed-integer-overflow sanitizer is enabled, emit a call to its |
Richard Smith | cc30561 | 2012-11-01 22:15:34 +0000 | [diff] [blame] | 2308 | // runtime. Otherwise, this is a -ftrapv check, so just emit a trap. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2309 | if (!isSigned || CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) { |
| 2310 | CodeGenFunction::SanitizerScope SanScope(&CGF); |
| 2311 | llvm::Value *NotOverflow = Builder.CreateNot(overflow); |
| 2312 | SanitizerKind Kind = isSigned ? SanitizerKind::SignedIntegerOverflow |
| 2313 | : SanitizerKind::UnsignedIntegerOverflow; |
| 2314 | EmitBinOpCheck(std::make_pair(NotOverflow, Kind), Ops); |
| 2315 | } else |
Chad Rosier | 78d85b1 | 2013-01-29 23:31:22 +0000 | [diff] [blame] | 2316 | CGF.EmitTrapCheck(Builder.CreateNot(overflow)); |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2317 | return result; |
| 2318 | } |
| 2319 | |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2320 | // Branch in case of overflow. |
David Chisnall | 7f18e67 | 2010-09-17 18:29:54 +0000 | [diff] [blame] | 2321 | llvm::BasicBlock *initialBB = Builder.GetInsertBlock(); |
Bill Wendling | 14ef319 | 2011-07-07 21:13:10 +0000 | [diff] [blame] | 2322 | llvm::Function::iterator insertPt = initialBB; |
| 2323 | llvm::BasicBlock *continueBB = CGF.createBasicBlock("nooverflow", CGF.CurFn, |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2324 | std::next(insertPt)); |
Chris Lattner | 93a0035 | 2010-08-07 00:20:46 +0000 | [diff] [blame] | 2325 | llvm::BasicBlock *overflowBB = CGF.createBasicBlock("overflow", CGF.CurFn); |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2326 | |
| 2327 | Builder.CreateCondBr(overflow, overflowBB, continueBB); |
| 2328 | |
David Chisnall | 7f18e67 | 2010-09-17 18:29:54 +0000 | [diff] [blame] | 2329 | // If an overflow handler is set, then we want to call it and then use its |
| 2330 | // result, if it returns. |
| 2331 | Builder.SetInsertPoint(overflowBB); |
| 2332 | |
| 2333 | // Get the overflow handler. |
Chris Lattner | 8b41868 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 2334 | llvm::Type *Int8Ty = CGF.Int8Ty; |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 2335 | llvm::Type *argTypes[] = { CGF.Int64Ty, CGF.Int64Ty, Int8Ty, Int8Ty }; |
David Chisnall | 7f18e67 | 2010-09-17 18:29:54 +0000 | [diff] [blame] | 2336 | llvm::FunctionType *handlerTy = |
| 2337 | llvm::FunctionType::get(CGF.Int64Ty, argTypes, true); |
| 2338 | llvm::Value *handler = CGF.CGM.CreateRuntimeFunction(handlerTy, *handlerName); |
| 2339 | |
| 2340 | // Sign extend the args to 64-bit, so that we can use the same handler for |
| 2341 | // all types of overflow. |
| 2342 | llvm::Value *lhs = Builder.CreateSExt(Ops.LHS, CGF.Int64Ty); |
| 2343 | llvm::Value *rhs = Builder.CreateSExt(Ops.RHS, CGF.Int64Ty); |
| 2344 | |
| 2345 | // Call the handler with the two arguments, the operation, and the size of |
| 2346 | // the result. |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2347 | llvm::Value *handlerArgs[] = { |
| 2348 | lhs, |
| 2349 | rhs, |
| 2350 | Builder.getInt8(OpID), |
| 2351 | Builder.getInt8(cast<llvm::IntegerType>(opTy)->getBitWidth()) |
| 2352 | }; |
| 2353 | llvm::Value *handlerResult = |
| 2354 | CGF.EmitNounwindRuntimeCall(handler, handlerArgs); |
David Chisnall | 7f18e67 | 2010-09-17 18:29:54 +0000 | [diff] [blame] | 2355 | |
| 2356 | // Truncate the result back to the desired size. |
| 2357 | handlerResult = Builder.CreateTrunc(handlerResult, opTy); |
| 2358 | Builder.CreateBr(continueBB); |
| 2359 | |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2360 | Builder.SetInsertPoint(continueBB); |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 2361 | llvm::PHINode *phi = Builder.CreatePHI(opTy, 2); |
David Chisnall | 7f18e67 | 2010-09-17 18:29:54 +0000 | [diff] [blame] | 2362 | phi->addIncoming(result, initialBB); |
| 2363 | phi->addIncoming(handlerResult, overflowBB); |
| 2364 | |
| 2365 | return phi; |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2366 | } |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2367 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2368 | /// Emit pointer + index arithmetic. |
| 2369 | static Value *emitPointerArithmetic(CodeGenFunction &CGF, |
| 2370 | const BinOpInfo &op, |
| 2371 | bool isSubtraction) { |
| 2372 | // Must have binary (not unary) expr here. Unary pointer |
| 2373 | // increment/decrement doesn't use this path. |
| 2374 | const BinaryOperator *expr = cast<BinaryOperator>(op.E); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2375 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2376 | Value *pointer = op.LHS; |
| 2377 | Expr *pointerOperand = expr->getLHS(); |
| 2378 | Value *index = op.RHS; |
| 2379 | Expr *indexOperand = expr->getRHS(); |
| 2380 | |
| 2381 | // In a subtraction, the LHS is always the pointer. |
| 2382 | if (!isSubtraction && !pointer->getType()->isPointerTy()) { |
| 2383 | std::swap(pointer, index); |
| 2384 | std::swap(pointerOperand, indexOperand); |
| 2385 | } |
| 2386 | |
| 2387 | unsigned width = cast<llvm::IntegerType>(index->getType())->getBitWidth(); |
| 2388 | if (width != CGF.PointerWidthInBits) { |
| 2389 | // Zero-extend or sign-extend the pointer value according to |
| 2390 | // whether the index is signed or not. |
| 2391 | bool isSigned = indexOperand->getType()->isSignedIntegerOrEnumerationType(); |
| 2392 | index = CGF.Builder.CreateIntCast(index, CGF.PtrDiffTy, isSigned, |
| 2393 | "idx.ext"); |
| 2394 | } |
| 2395 | |
| 2396 | // If this is subtraction, negate the index. |
| 2397 | if (isSubtraction) |
| 2398 | index = CGF.Builder.CreateNeg(index, "idx.neg"); |
| 2399 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2400 | if (CGF.SanOpts.has(SanitizerKind::ArrayBounds)) |
Richard Smith | a0a628f | 2013-02-23 02:53:19 +0000 | [diff] [blame] | 2401 | CGF.EmitBoundsCheck(op.E, pointerOperand, index, indexOperand->getType(), |
| 2402 | /*Accessed*/ false); |
| 2403 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2404 | const PointerType *pointerType |
| 2405 | = pointerOperand->getType()->getAs<PointerType>(); |
| 2406 | if (!pointerType) { |
| 2407 | QualType objectType = pointerOperand->getType() |
| 2408 | ->castAs<ObjCObjectPointerType>() |
| 2409 | ->getPointeeType(); |
| 2410 | llvm::Value *objectSize |
| 2411 | = CGF.CGM.getSize(CGF.getContext().getTypeSizeInChars(objectType)); |
| 2412 | |
| 2413 | index = CGF.Builder.CreateMul(index, objectSize); |
| 2414 | |
| 2415 | Value *result = CGF.Builder.CreateBitCast(pointer, CGF.VoidPtrTy); |
| 2416 | result = CGF.Builder.CreateGEP(result, index, "add.ptr"); |
| 2417 | return CGF.Builder.CreateBitCast(result, pointer->getType()); |
| 2418 | } |
| 2419 | |
| 2420 | QualType elementType = pointerType->getPointeeType(); |
| 2421 | if (const VariableArrayType *vla |
| 2422 | = CGF.getContext().getAsVariableArrayType(elementType)) { |
| 2423 | // The element count here is the total number of non-VLA elements. |
| 2424 | llvm::Value *numElements = CGF.getVLASize(vla).first; |
| 2425 | |
| 2426 | // Effectively, the multiply by the VLA size is part of the GEP. |
| 2427 | // GEP indexes are signed, and scaling an index isn't permitted to |
| 2428 | // signed-overflow, so we use the same semantics for our explicit |
| 2429 | // multiply. We suppress this if overflow is not undefined behavior. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2430 | if (CGF.getLangOpts().isSignedOverflowDefined()) { |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2431 | index = CGF.Builder.CreateMul(index, numElements, "vla.index"); |
| 2432 | pointer = CGF.Builder.CreateGEP(pointer, index, "add.ptr"); |
| 2433 | } else { |
| 2434 | index = CGF.Builder.CreateNSWMul(index, numElements, "vla.index"); |
| 2435 | pointer = CGF.Builder.CreateInBoundsGEP(pointer, index, "add.ptr"); |
Chris Lattner | a4d7145 | 2010-06-26 21:25:03 +0000 | [diff] [blame] | 2436 | } |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2437 | return pointer; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2438 | } |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 2439 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2440 | // Explicitly handle GNU void* and function pointer arithmetic extensions. The |
| 2441 | // GNU void* casts amount to no-ops since our void* type is i8*, but this is |
| 2442 | // future proof. |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2443 | if (elementType->isVoidType() || elementType->isFunctionType()) { |
| 2444 | Value *result = CGF.Builder.CreateBitCast(pointer, CGF.VoidPtrTy); |
| 2445 | result = CGF.Builder.CreateGEP(result, index, "add.ptr"); |
| 2446 | return CGF.Builder.CreateBitCast(result, pointer->getType()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2447 | } |
| 2448 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2449 | if (CGF.getLangOpts().isSignedOverflowDefined()) |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2450 | return CGF.Builder.CreateGEP(pointer, index, "add.ptr"); |
| 2451 | |
| 2452 | return CGF.Builder.CreateInBoundsGEP(pointer, index, "add.ptr"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2453 | } |
| 2454 | |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2455 | // Construct an fmuladd intrinsic to represent a fused mul-add of MulOp and |
| 2456 | // Addend. Use negMul and negAdd to negate the first operand of the Mul or |
| 2457 | // the add operand respectively. This allows fmuladd to represent a*b-c, or |
| 2458 | // c-a*b. Patterns in LLVM should catch the negated forms and translate them to |
| 2459 | // efficient operations. |
| 2460 | static Value* buildFMulAdd(llvm::BinaryOperator *MulOp, Value *Addend, |
| 2461 | const CodeGenFunction &CGF, CGBuilderTy &Builder, |
| 2462 | bool negMul, bool negAdd) { |
| 2463 | assert(!(negMul && negAdd) && "Only one of negMul and negAdd should be set."); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2464 | |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2465 | Value *MulOp0 = MulOp->getOperand(0); |
| 2466 | Value *MulOp1 = MulOp->getOperand(1); |
| 2467 | if (negMul) { |
| 2468 | MulOp0 = |
| 2469 | Builder.CreateFSub( |
| 2470 | llvm::ConstantFP::getZeroValueForNegation(MulOp0->getType()), MulOp0, |
| 2471 | "neg"); |
| 2472 | } else if (negAdd) { |
| 2473 | Addend = |
| 2474 | Builder.CreateFSub( |
| 2475 | llvm::ConstantFP::getZeroValueForNegation(Addend->getType()), Addend, |
| 2476 | "neg"); |
| 2477 | } |
| 2478 | |
| 2479 | Value *FMulAdd = |
| 2480 | Builder.CreateCall3( |
| 2481 | CGF.CGM.getIntrinsic(llvm::Intrinsic::fmuladd, Addend->getType()), |
| 2482 | MulOp0, MulOp1, Addend); |
| 2483 | MulOp->eraseFromParent(); |
| 2484 | |
| 2485 | return FMulAdd; |
| 2486 | } |
| 2487 | |
| 2488 | // Check whether it would be legal to emit an fmuladd intrinsic call to |
| 2489 | // represent op and if so, build the fmuladd. |
| 2490 | // |
| 2491 | // Checks that (a) the operation is fusable, and (b) -ffp-contract=on. |
| 2492 | // Does NOT check the type of the operation - it's assumed that this function |
| 2493 | // will be called from contexts where it's known that the type is contractable. |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2494 | static Value* tryEmitFMulAdd(const BinOpInfo &op, |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2495 | const CodeGenFunction &CGF, CGBuilderTy &Builder, |
| 2496 | bool isSub=false) { |
| 2497 | |
| 2498 | assert((op.Opcode == BO_Add || op.Opcode == BO_AddAssign || |
| 2499 | op.Opcode == BO_Sub || op.Opcode == BO_SubAssign) && |
| 2500 | "Only fadd/fsub can be the root of an fmuladd."); |
| 2501 | |
| 2502 | // Check whether this op is marked as fusable. |
| 2503 | if (!op.FPContractable) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2504 | return nullptr; |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2505 | |
| 2506 | // Check whether -ffp-contract=on. (If -ffp-contract=off/fast, fusing is |
| 2507 | // either disabled, or handled entirely by the LLVM backend). |
Lang Hames | 931c083 | 2012-11-15 07:51:26 +0000 | [diff] [blame] | 2508 | if (CGF.CGM.getCodeGenOpts().getFPContractMode() != CodeGenOptions::FPC_On) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2509 | return nullptr; |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2510 | |
| 2511 | // We have a potentially fusable op. Look for a mul on one of the operands. |
| 2512 | if (llvm::BinaryOperator* LHSBinOp = dyn_cast<llvm::BinaryOperator>(op.LHS)) { |
| 2513 | if (LHSBinOp->getOpcode() == llvm::Instruction::FMul) { |
Lang Hames | ff4ae6d | 2012-10-04 03:23:25 +0000 | [diff] [blame] | 2514 | assert(LHSBinOp->getNumUses() == 0 && |
| 2515 | "Operations with multiple uses shouldn't be contracted."); |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2516 | return buildFMulAdd(LHSBinOp, op.RHS, CGF, Builder, false, isSub); |
| 2517 | } |
| 2518 | } else if (llvm::BinaryOperator* RHSBinOp = |
| 2519 | dyn_cast<llvm::BinaryOperator>(op.RHS)) { |
| 2520 | if (RHSBinOp->getOpcode() == llvm::Instruction::FMul) { |
Lang Hames | ff4ae6d | 2012-10-04 03:23:25 +0000 | [diff] [blame] | 2521 | assert(RHSBinOp->getNumUses() == 0 && |
| 2522 | "Operations with multiple uses shouldn't be contracted."); |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2523 | return buildFMulAdd(RHSBinOp, op.LHS, CGF, Builder, isSub, false); |
| 2524 | } |
| 2525 | } |
| 2526 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2527 | return nullptr; |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2528 | } |
| 2529 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2530 | Value *ScalarExprEmitter::EmitAdd(const BinOpInfo &op) { |
| 2531 | if (op.LHS->getType()->isPointerTy() || |
| 2532 | op.RHS->getType()->isPointerTy()) |
| 2533 | return emitPointerArithmetic(CGF, op, /*subtraction*/ false); |
| 2534 | |
| 2535 | if (op.Ty->isSignedIntegerOrEnumerationType()) { |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 2536 | switch (CGF.getLangOpts().getSignedOverflowBehavior()) { |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2537 | case LangOptions::SOB_Defined: |
| 2538 | return Builder.CreateAdd(op.LHS, op.RHS, "add"); |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2539 | case LangOptions::SOB_Undefined: |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2540 | if (!CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2541 | return Builder.CreateNSWAdd(op.LHS, op.RHS, "add"); |
| 2542 | // Fall through. |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2543 | case LangOptions::SOB_Trapping: |
| 2544 | return EmitOverflowCheckedBinOp(op); |
| 2545 | } |
| 2546 | } |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2547 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2548 | if (op.Ty->isUnsignedIntegerType() && |
| 2549 | CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2550 | return EmitOverflowCheckedBinOp(op); |
| 2551 | |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2552 | if (op.LHS->getType()->isFPOrFPVectorTy()) { |
| 2553 | // Try to form an fmuladd. |
| 2554 | if (Value *FMulAdd = tryEmitFMulAdd(op, CGF, Builder)) |
| 2555 | return FMulAdd; |
| 2556 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2557 | return Builder.CreateFAdd(op.LHS, op.RHS, "add"); |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2558 | } |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2559 | |
| 2560 | return Builder.CreateAdd(op.LHS, op.RHS, "add"); |
| 2561 | } |
| 2562 | |
| 2563 | Value *ScalarExprEmitter::EmitSub(const BinOpInfo &op) { |
| 2564 | // The LHS is always a pointer if either side is. |
| 2565 | if (!op.LHS->getType()->isPointerTy()) { |
| 2566 | if (op.Ty->isSignedIntegerOrEnumerationType()) { |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 2567 | switch (CGF.getLangOpts().getSignedOverflowBehavior()) { |
Chris Lattner | a4d7145 | 2010-06-26 21:25:03 +0000 | [diff] [blame] | 2568 | case LangOptions::SOB_Defined: |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2569 | return Builder.CreateSub(op.LHS, op.RHS, "sub"); |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2570 | case LangOptions::SOB_Undefined: |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2571 | if (!CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2572 | return Builder.CreateNSWSub(op.LHS, op.RHS, "sub"); |
| 2573 | // Fall through. |
Chris Lattner | a4d7145 | 2010-06-26 21:25:03 +0000 | [diff] [blame] | 2574 | case LangOptions::SOB_Trapping: |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2575 | return EmitOverflowCheckedBinOp(op); |
Chris Lattner | a4d7145 | 2010-06-26 21:25:03 +0000 | [diff] [blame] | 2576 | } |
| 2577 | } |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2578 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2579 | if (op.Ty->isUnsignedIntegerType() && |
| 2580 | CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2581 | return EmitOverflowCheckedBinOp(op); |
| 2582 | |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2583 | if (op.LHS->getType()->isFPOrFPVectorTy()) { |
| 2584 | // Try to form an fmuladd. |
| 2585 | if (Value *FMulAdd = tryEmitFMulAdd(op, CGF, Builder, true)) |
| 2586 | return FMulAdd; |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2587 | return Builder.CreateFSub(op.LHS, op.RHS, "sub"); |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2588 | } |
Chris Lattner | 2eb91e4 | 2010-03-29 17:28:16 +0000 | [diff] [blame] | 2589 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2590 | return Builder.CreateSub(op.LHS, op.RHS, "sub"); |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2591 | } |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 2592 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2593 | // If the RHS is not a pointer, then we have normal pointer |
| 2594 | // arithmetic. |
| 2595 | if (!op.RHS->getType()->isPointerTy()) |
| 2596 | return emitPointerArithmetic(CGF, op, /*subtraction*/ true); |
Eli Friedman | daa24a2 | 2009-03-28 02:45:41 +0000 | [diff] [blame] | 2597 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2598 | // Otherwise, this is a pointer subtraction. |
Daniel Dunbar | b09fae7 | 2009-01-23 18:51:09 +0000 | [diff] [blame] | 2599 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2600 | // Do the raw subtraction part. |
| 2601 | llvm::Value *LHS |
| 2602 | = Builder.CreatePtrToInt(op.LHS, CGF.PtrDiffTy, "sub.ptr.lhs.cast"); |
| 2603 | llvm::Value *RHS |
| 2604 | = Builder.CreatePtrToInt(op.RHS, CGF.PtrDiffTy, "sub.ptr.rhs.cast"); |
| 2605 | Value *diffInChars = Builder.CreateSub(LHS, RHS, "sub.ptr.sub"); |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 2606 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2607 | // Okay, figure out the element size. |
| 2608 | const BinaryOperator *expr = cast<BinaryOperator>(op.E); |
| 2609 | QualType elementType = expr->getLHS()->getType()->getPointeeType(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2610 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2611 | llvm::Value *divisor = nullptr; |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2612 | |
| 2613 | // For a variable-length array, this is going to be non-constant. |
| 2614 | if (const VariableArrayType *vla |
| 2615 | = CGF.getContext().getAsVariableArrayType(elementType)) { |
| 2616 | llvm::Value *numElements; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2617 | std::tie(numElements, elementType) = CGF.getVLASize(vla); |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2618 | |
| 2619 | divisor = numElements; |
| 2620 | |
| 2621 | // Scale the number of non-VLA elements by the non-VLA element size. |
| 2622 | CharUnits eltSize = CGF.getContext().getTypeSizeInChars(elementType); |
| 2623 | if (!eltSize.isOne()) |
| 2624 | divisor = CGF.Builder.CreateNUWMul(CGF.CGM.getSize(eltSize), divisor); |
| 2625 | |
| 2626 | // For everything elese, we can just compute it, safe in the |
| 2627 | // assumption that Sema won't let anything through that we can't |
| 2628 | // safely compute the size of. |
| 2629 | } else { |
| 2630 | CharUnits elementSize; |
| 2631 | // Handle GCC extension for pointer arithmetic on void* and |
| 2632 | // function pointer types. |
| 2633 | if (elementType->isVoidType() || elementType->isFunctionType()) |
| 2634 | elementSize = CharUnits::One(); |
| 2635 | else |
| 2636 | elementSize = CGF.getContext().getTypeSizeInChars(elementType); |
| 2637 | |
| 2638 | // Don't even emit the divide for element size of 1. |
| 2639 | if (elementSize.isOne()) |
| 2640 | return diffInChars; |
| 2641 | |
| 2642 | divisor = CGF.CGM.getSize(elementSize); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2643 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2644 | |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 2645 | // Otherwise, do a full sdiv. This uses the "exact" form of sdiv, since |
| 2646 | // pointer difference in C is only defined in the case where both operands |
| 2647 | // are pointing to elements of an array. |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2648 | return Builder.CreateExactSDiv(diffInChars, divisor, "sub.ptr.div"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2649 | } |
| 2650 | |
David Tweed | 7a83421 | 2013-01-07 16:43:27 +0000 | [diff] [blame] | 2651 | Value *ScalarExprEmitter::GetWidthMinusOneValue(Value* LHS,Value* RHS) { |
David Tweed | f20318f | 2013-01-10 09:11:33 +0000 | [diff] [blame] | 2652 | llvm::IntegerType *Ty; |
| 2653 | if (llvm::VectorType *VT = dyn_cast<llvm::VectorType>(LHS->getType())) |
| 2654 | Ty = cast<llvm::IntegerType>(VT->getElementType()); |
| 2655 | else |
| 2656 | Ty = cast<llvm::IntegerType>(LHS->getType()); |
| 2657 | return llvm::ConstantInt::get(RHS->getType(), Ty->getBitWidth() - 1); |
David Tweed | 7a83421 | 2013-01-07 16:43:27 +0000 | [diff] [blame] | 2658 | } |
| 2659 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2660 | Value *ScalarExprEmitter::EmitShl(const BinOpInfo &Ops) { |
| 2661 | // LLVM requires the LHS and RHS to be the same type: promote or truncate the |
| 2662 | // RHS to the same size as the LHS. |
| 2663 | Value *RHS = Ops.RHS; |
| 2664 | if (Ops.LHS->getType() != RHS->getType()) |
| 2665 | RHS = Builder.CreateIntCast(RHS, Ops.LHS->getType(), false, "sh_prom"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2666 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2667 | if (CGF.SanOpts.has(SanitizerKind::Shift) && !CGF.getLangOpts().OpenCL && |
Will Dietz | 4f45bc0 | 2013-01-18 11:30:38 +0000 | [diff] [blame] | 2668 | isa<llvm::IntegerType>(Ops.LHS->getType())) { |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2669 | CodeGenFunction::SanitizerScope SanScope(&CGF); |
David Tweed | 7a83421 | 2013-01-07 16:43:27 +0000 | [diff] [blame] | 2670 | llvm::Value *WidthMinusOne = GetWidthMinusOneValue(Ops.LHS, RHS); |
Will Dietz | bb60fc6 | 2013-02-25 22:37:49 +0000 | [diff] [blame] | 2671 | llvm::Value *Valid = Builder.CreateICmpULE(RHS, WidthMinusOne); |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2672 | |
| 2673 | if (Ops.Ty->hasSignedIntegerRepresentation()) { |
Will Dietz | bb60fc6 | 2013-02-25 22:37:49 +0000 | [diff] [blame] | 2674 | llvm::BasicBlock *Orig = Builder.GetInsertBlock(); |
| 2675 | llvm::BasicBlock *Cont = CGF.createBasicBlock("cont"); |
| 2676 | llvm::BasicBlock *CheckBitsShifted = CGF.createBasicBlock("check"); |
| 2677 | Builder.CreateCondBr(Valid, CheckBitsShifted, Cont); |
| 2678 | |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2679 | // Check whether we are shifting any non-zero bits off the top of the |
| 2680 | // integer. |
Will Dietz | bb60fc6 | 2013-02-25 22:37:49 +0000 | [diff] [blame] | 2681 | CGF.EmitBlock(CheckBitsShifted); |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2682 | llvm::Value *BitsShiftedOff = |
| 2683 | Builder.CreateLShr(Ops.LHS, |
| 2684 | Builder.CreateSub(WidthMinusOne, RHS, "shl.zeros", |
| 2685 | /*NUW*/true, /*NSW*/true), |
| 2686 | "shl.check"); |
| 2687 | if (CGF.getLangOpts().CPlusPlus) { |
| 2688 | // In C99, we are not permitted to shift a 1 bit into the sign bit. |
| 2689 | // Under C++11's rules, shifting a 1 bit into the sign bit is |
| 2690 | // OK, but shifting a 1 bit out of it is not. (C89 and C++03 don't |
| 2691 | // define signed left shifts, so we use the C99 and C++11 rules there). |
| 2692 | llvm::Value *One = llvm::ConstantInt::get(BitsShiftedOff->getType(), 1); |
| 2693 | BitsShiftedOff = Builder.CreateLShr(BitsShiftedOff, One); |
| 2694 | } |
| 2695 | llvm::Value *Zero = llvm::ConstantInt::get(BitsShiftedOff->getType(), 0); |
Will Dietz | bb60fc6 | 2013-02-25 22:37:49 +0000 | [diff] [blame] | 2696 | llvm::Value *SecondCheck = Builder.CreateICmpEQ(BitsShiftedOff, Zero); |
| 2697 | CGF.EmitBlock(Cont); |
| 2698 | llvm::PHINode *P = Builder.CreatePHI(Valid->getType(), 2); |
| 2699 | P->addIncoming(Valid, Orig); |
| 2700 | P->addIncoming(SecondCheck, CheckBitsShifted); |
| 2701 | Valid = P; |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2702 | } |
Will Dietz | bb60fc6 | 2013-02-25 22:37:49 +0000 | [diff] [blame] | 2703 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2704 | EmitBinOpCheck(std::make_pair(Valid, SanitizerKind::Shift), Ops); |
Mike Stump | be07f60 | 2009-12-14 21:58:14 +0000 | [diff] [blame] | 2705 | } |
David Tweed | 7a83421 | 2013-01-07 16:43:27 +0000 | [diff] [blame] | 2706 | // OpenCL 6.3j: shift values are effectively % word size of LHS. |
| 2707 | if (CGF.getLangOpts().OpenCL) |
| 2708 | RHS = Builder.CreateAnd(RHS, GetWidthMinusOneValue(Ops.LHS, RHS), "shl.mask"); |
Mike Stump | be07f60 | 2009-12-14 21:58:14 +0000 | [diff] [blame] | 2709 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2710 | return Builder.CreateShl(Ops.LHS, RHS, "shl"); |
| 2711 | } |
| 2712 | |
| 2713 | Value *ScalarExprEmitter::EmitShr(const BinOpInfo &Ops) { |
| 2714 | // LLVM requires the LHS and RHS to be the same type: promote or truncate the |
| 2715 | // RHS to the same size as the LHS. |
| 2716 | Value *RHS = Ops.RHS; |
| 2717 | if (Ops.LHS->getType() != RHS->getType()) |
| 2718 | RHS = Builder.CreateIntCast(RHS, Ops.LHS->getType(), false, "sh_prom"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2719 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2720 | if (CGF.SanOpts.has(SanitizerKind::Shift) && !CGF.getLangOpts().OpenCL && |
| 2721 | isa<llvm::IntegerType>(Ops.LHS->getType())) { |
| 2722 | CodeGenFunction::SanitizerScope SanScope(&CGF); |
| 2723 | llvm::Value *Valid = |
| 2724 | Builder.CreateICmpULE(RHS, GetWidthMinusOneValue(Ops.LHS, RHS)); |
| 2725 | EmitBinOpCheck(std::make_pair(Valid, SanitizerKind::Shift), Ops); |
| 2726 | } |
David Tweed | 7a83421 | 2013-01-07 16:43:27 +0000 | [diff] [blame] | 2727 | |
| 2728 | // OpenCL 6.3j: shift values are effectively % word size of LHS. |
| 2729 | if (CGF.getLangOpts().OpenCL) |
| 2730 | RHS = Builder.CreateAnd(RHS, GetWidthMinusOneValue(Ops.LHS, RHS), "shr.mask"); |
Mike Stump | be07f60 | 2009-12-14 21:58:14 +0000 | [diff] [blame] | 2731 | |
Douglas Gregor | f609462 | 2010-07-23 15:58:24 +0000 | [diff] [blame] | 2732 | if (Ops.Ty->hasUnsignedIntegerRepresentation()) |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2733 | return Builder.CreateLShr(Ops.LHS, RHS, "shr"); |
| 2734 | return Builder.CreateAShr(Ops.LHS, RHS, "shr"); |
| 2735 | } |
| 2736 | |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2737 | enum IntrinsicType { VCMPEQ, VCMPGT }; |
| 2738 | // return corresponding comparison intrinsic for given vector type |
| 2739 | static llvm::Intrinsic::ID GetIntrinsic(IntrinsicType IT, |
| 2740 | BuiltinType::Kind ElemKind) { |
| 2741 | switch (ElemKind) { |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 2742 | default: llvm_unreachable("unexpected element type"); |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2743 | case BuiltinType::Char_U: |
| 2744 | case BuiltinType::UChar: |
| 2745 | return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequb_p : |
| 2746 | llvm::Intrinsic::ppc_altivec_vcmpgtub_p; |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2747 | case BuiltinType::Char_S: |
| 2748 | case BuiltinType::SChar: |
| 2749 | return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequb_p : |
| 2750 | llvm::Intrinsic::ppc_altivec_vcmpgtsb_p; |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2751 | case BuiltinType::UShort: |
| 2752 | return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequh_p : |
| 2753 | llvm::Intrinsic::ppc_altivec_vcmpgtuh_p; |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2754 | case BuiltinType::Short: |
| 2755 | return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequh_p : |
| 2756 | llvm::Intrinsic::ppc_altivec_vcmpgtsh_p; |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2757 | case BuiltinType::UInt: |
| 2758 | case BuiltinType::ULong: |
| 2759 | return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequw_p : |
| 2760 | llvm::Intrinsic::ppc_altivec_vcmpgtuw_p; |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2761 | case BuiltinType::Int: |
| 2762 | case BuiltinType::Long: |
| 2763 | return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequw_p : |
| 2764 | llvm::Intrinsic::ppc_altivec_vcmpgtsw_p; |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2765 | case BuiltinType::Float: |
| 2766 | return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpeqfp_p : |
| 2767 | llvm::Intrinsic::ppc_altivec_vcmpgtfp_p; |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2768 | } |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2769 | } |
| 2770 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2771 | Value *ScalarExprEmitter::EmitCompare(const BinaryOperator *E,unsigned UICmpOpc, |
| 2772 | unsigned SICmpOpc, unsigned FCmpOpc) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 2773 | TestAndClearIgnoreResultAssign(); |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 2774 | Value *Result; |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2775 | QualType LHSTy = E->getLHS()->getType(); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2776 | QualType RHSTy = E->getRHS()->getType(); |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 2777 | if (const MemberPointerType *MPT = LHSTy->getAs<MemberPointerType>()) { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2778 | assert(E->getOpcode() == BO_EQ || |
| 2779 | E->getOpcode() == BO_NE); |
John McCall | d608cdb | 2010-08-22 10:59:02 +0000 | [diff] [blame] | 2780 | Value *LHS = CGF.EmitScalarExpr(E->getLHS()); |
| 2781 | Value *RHS = CGF.EmitScalarExpr(E->getRHS()); |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 2782 | Result = CGF.CGM.getCXXABI().EmitMemberPointerComparison( |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2783 | CGF, LHS, RHS, MPT, E->getOpcode() == BO_NE); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2784 | } else if (!LHSTy->isAnyComplexType() && !RHSTy->isAnyComplexType()) { |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2785 | Value *LHS = Visit(E->getLHS()); |
| 2786 | Value *RHS = Visit(E->getRHS()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2787 | |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2788 | // If AltiVec, the comparison results in a numeric type, so we use |
| 2789 | // intrinsics comparing vectors and giving 0 or 1 as a result |
Anton Yartsev | 6305f72 | 2011-03-28 21:00:05 +0000 | [diff] [blame] | 2790 | if (LHSTy->isVectorType() && !E->getType()->isVectorType()) { |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2791 | // constants for mapping CR6 register bits to predicate result |
| 2792 | enum { CR6_EQ=0, CR6_EQ_REV, CR6_LT, CR6_LT_REV } CR6; |
| 2793 | |
| 2794 | llvm::Intrinsic::ID ID = llvm::Intrinsic::not_intrinsic; |
| 2795 | |
| 2796 | // in several cases vector arguments order will be reversed |
| 2797 | Value *FirstVecArg = LHS, |
| 2798 | *SecondVecArg = RHS; |
| 2799 | |
| 2800 | QualType ElTy = LHSTy->getAs<VectorType>()->getElementType(); |
John McCall | f4c7371 | 2011-01-19 06:33:43 +0000 | [diff] [blame] | 2801 | const BuiltinType *BTy = ElTy->getAs<BuiltinType>(); |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2802 | BuiltinType::Kind ElementKind = BTy->getKind(); |
| 2803 | |
| 2804 | switch(E->getOpcode()) { |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 2805 | default: llvm_unreachable("is not a comparison operation"); |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2806 | case BO_EQ: |
| 2807 | CR6 = CR6_LT; |
| 2808 | ID = GetIntrinsic(VCMPEQ, ElementKind); |
| 2809 | break; |
| 2810 | case BO_NE: |
| 2811 | CR6 = CR6_EQ; |
| 2812 | ID = GetIntrinsic(VCMPEQ, ElementKind); |
| 2813 | break; |
| 2814 | case BO_LT: |
| 2815 | CR6 = CR6_LT; |
| 2816 | ID = GetIntrinsic(VCMPGT, ElementKind); |
| 2817 | std::swap(FirstVecArg, SecondVecArg); |
| 2818 | break; |
| 2819 | case BO_GT: |
| 2820 | CR6 = CR6_LT; |
| 2821 | ID = GetIntrinsic(VCMPGT, ElementKind); |
| 2822 | break; |
| 2823 | case BO_LE: |
| 2824 | if (ElementKind == BuiltinType::Float) { |
| 2825 | CR6 = CR6_LT; |
| 2826 | ID = llvm::Intrinsic::ppc_altivec_vcmpgefp_p; |
| 2827 | std::swap(FirstVecArg, SecondVecArg); |
| 2828 | } |
| 2829 | else { |
| 2830 | CR6 = CR6_EQ; |
| 2831 | ID = GetIntrinsic(VCMPGT, ElementKind); |
| 2832 | } |
| 2833 | break; |
| 2834 | case BO_GE: |
| 2835 | if (ElementKind == BuiltinType::Float) { |
| 2836 | CR6 = CR6_LT; |
| 2837 | ID = llvm::Intrinsic::ppc_altivec_vcmpgefp_p; |
| 2838 | } |
| 2839 | else { |
| 2840 | CR6 = CR6_EQ; |
| 2841 | ID = GetIntrinsic(VCMPGT, ElementKind); |
| 2842 | std::swap(FirstVecArg, SecondVecArg); |
| 2843 | } |
| 2844 | break; |
| 2845 | } |
| 2846 | |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 2847 | Value *CR6Param = Builder.getInt32(CR6); |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2848 | llvm::Function *F = CGF.CGM.getIntrinsic(ID); |
| 2849 | Result = Builder.CreateCall3(F, CR6Param, FirstVecArg, SecondVecArg, ""); |
| 2850 | return EmitScalarConversion(Result, CGF.getContext().BoolTy, E->getType()); |
| 2851 | } |
| 2852 | |
Duncan Sands | f177d9d | 2010-02-15 16:14:01 +0000 | [diff] [blame] | 2853 | if (LHS->getType()->isFPOrFPVectorTy()) { |
Nate Begeman | 7a66d7b | 2008-07-25 20:16:05 +0000 | [diff] [blame] | 2854 | Result = Builder.CreateFCmp((llvm::CmpInst::Predicate)FCmpOpc, |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2855 | LHS, RHS, "cmp"); |
Douglas Gregor | f609462 | 2010-07-23 15:58:24 +0000 | [diff] [blame] | 2856 | } else if (LHSTy->hasSignedIntegerRepresentation()) { |
Eli Friedman | ec2c126 | 2008-05-29 15:09:15 +0000 | [diff] [blame] | 2857 | Result = Builder.CreateICmp((llvm::ICmpInst::Predicate)SICmpOpc, |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2858 | LHS, RHS, "cmp"); |
| 2859 | } else { |
Eli Friedman | ec2c126 | 2008-05-29 15:09:15 +0000 | [diff] [blame] | 2860 | // Unsigned integers and pointers. |
| 2861 | Result = Builder.CreateICmp((llvm::ICmpInst::Predicate)UICmpOpc, |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2862 | LHS, RHS, "cmp"); |
| 2863 | } |
Chris Lattner | 9c10fcf | 2009-07-08 01:08:03 +0000 | [diff] [blame] | 2864 | |
| 2865 | // If this is a vector comparison, sign extend the result to the appropriate |
| 2866 | // vector integer type and return it (don't convert to bool). |
| 2867 | if (LHSTy->isVectorType()) |
| 2868 | return Builder.CreateSExt(Result, ConvertType(E->getType()), "sext"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2869 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2870 | } else { |
| 2871 | // Complex Comparison: can only be an equality comparison. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2872 | CodeGenFunction::ComplexPairTy LHS, RHS; |
| 2873 | QualType CETy; |
| 2874 | if (auto *CTy = LHSTy->getAs<ComplexType>()) { |
| 2875 | LHS = CGF.EmitComplexExpr(E->getLHS()); |
| 2876 | CETy = CTy->getElementType(); |
| 2877 | } else { |
| 2878 | LHS.first = Visit(E->getLHS()); |
| 2879 | LHS.second = llvm::Constant::getNullValue(LHS.first->getType()); |
| 2880 | CETy = LHSTy; |
| 2881 | } |
| 2882 | if (auto *CTy = RHSTy->getAs<ComplexType>()) { |
| 2883 | RHS = CGF.EmitComplexExpr(E->getRHS()); |
| 2884 | assert(CGF.getContext().hasSameUnqualifiedType(CETy, |
| 2885 | CTy->getElementType()) && |
| 2886 | "The element types must always match."); |
| 2887 | (void)CTy; |
| 2888 | } else { |
| 2889 | RHS.first = Visit(E->getRHS()); |
| 2890 | RHS.second = llvm::Constant::getNullValue(RHS.first->getType()); |
| 2891 | assert(CGF.getContext().hasSameUnqualifiedType(CETy, RHSTy) && |
| 2892 | "The element types must always match."); |
| 2893 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2894 | |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 2895 | Value *ResultR, *ResultI; |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2896 | if (CETy->isRealFloatingType()) { |
| 2897 | ResultR = Builder.CreateFCmp((llvm::FCmpInst::Predicate)FCmpOpc, |
| 2898 | LHS.first, RHS.first, "cmp.r"); |
| 2899 | ResultI = Builder.CreateFCmp((llvm::FCmpInst::Predicate)FCmpOpc, |
| 2900 | LHS.second, RHS.second, "cmp.i"); |
| 2901 | } else { |
| 2902 | // Complex comparisons can only be equality comparisons. As such, signed |
| 2903 | // and unsigned opcodes are the same. |
| 2904 | ResultR = Builder.CreateICmp((llvm::ICmpInst::Predicate)UICmpOpc, |
| 2905 | LHS.first, RHS.first, "cmp.r"); |
| 2906 | ResultI = Builder.CreateICmp((llvm::ICmpInst::Predicate)UICmpOpc, |
| 2907 | LHS.second, RHS.second, "cmp.i"); |
| 2908 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2909 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2910 | if (E->getOpcode() == BO_EQ) { |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2911 | Result = Builder.CreateAnd(ResultR, ResultI, "and.ri"); |
| 2912 | } else { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2913 | assert(E->getOpcode() == BO_NE && |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2914 | "Complex comparison other than == or != ?"); |
| 2915 | Result = Builder.CreateOr(ResultR, ResultI, "or.ri"); |
| 2916 | } |
| 2917 | } |
Nuno Lopes | 32f6209 | 2009-01-11 23:22:37 +0000 | [diff] [blame] | 2918 | |
| 2919 | return EmitScalarConversion(Result, CGF.getContext().BoolTy, E->getType()); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2920 | } |
| 2921 | |
| 2922 | Value *ScalarExprEmitter::VisitBinAssign(const BinaryOperator *E) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 2923 | bool Ignore = TestAndClearIgnoreResultAssign(); |
| 2924 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2925 | Value *RHS; |
| 2926 | LValue LHS; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2927 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2928 | switch (E->getLHS()->getType().getObjCLifetime()) { |
| 2929 | case Qualifiers::OCL_Strong: |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2930 | std::tie(LHS, RHS) = CGF.EmitARCStoreStrong(E, Ignore); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2931 | break; |
| 2932 | |
| 2933 | case Qualifiers::OCL_Autoreleasing: |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2934 | std::tie(LHS, RHS) = CGF.EmitARCStoreAutoreleasing(E); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2935 | break; |
| 2936 | |
| 2937 | case Qualifiers::OCL_Weak: |
| 2938 | RHS = Visit(E->getRHS()); |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2939 | LHS = EmitCheckedLValue(E->getLHS(), CodeGenFunction::TCK_Store); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2940 | RHS = CGF.EmitARCStoreWeak(LHS.getAddress(), RHS, Ignore); |
| 2941 | break; |
| 2942 | |
| 2943 | // No reason to do any of these differently. |
| 2944 | case Qualifiers::OCL_None: |
| 2945 | case Qualifiers::OCL_ExplicitNone: |
| 2946 | // __block variables need to have the rhs evaluated first, plus |
| 2947 | // this should improve codegen just a little. |
| 2948 | RHS = Visit(E->getRHS()); |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2949 | LHS = EmitCheckedLValue(E->getLHS(), CodeGenFunction::TCK_Store); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2950 | |
| 2951 | // Store the value into the LHS. Bit-fields are handled specially |
| 2952 | // because the result is altered by the store, i.e., [C99 6.5.16p1] |
| 2953 | // 'An assignment expression has the value of the left operand after |
| 2954 | // the assignment...'. |
| 2955 | if (LHS.isBitField()) |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 2956 | CGF.EmitStoreThroughBitfieldLValue(RValue::get(RHS), LHS, &RHS); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2957 | else |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 2958 | CGF.EmitStoreThroughLValue(RValue::get(RHS), LHS); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2959 | } |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2960 | |
| 2961 | // If the result is clearly ignored, return now. |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 2962 | if (Ignore) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2963 | return nullptr; |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2964 | |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2965 | // The result of an assignment in C is the assigned r-value. |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 2966 | if (!CGF.getLangOpts().CPlusPlus) |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2967 | return RHS; |
| 2968 | |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2969 | // If the lvalue is non-volatile, return the computed value of the assignment. |
| 2970 | if (!LHS.isVolatileQualified()) |
| 2971 | return RHS; |
| 2972 | |
| 2973 | // Otherwise, reload the value. |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 2974 | return EmitLoadOfLValue(LHS, E->getExprLoc()); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2975 | } |
| 2976 | |
| 2977 | Value *ScalarExprEmitter::VisitBinLAnd(const BinaryOperator *E) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2978 | RegionCounter Cnt = CGF.getPGORegionCounter(E); |
| 2979 | |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 2980 | // Perform vector logical and on comparisons with zero vectors. |
| 2981 | if (E->getType()->isVectorType()) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2982 | Cnt.beginRegion(Builder); |
| 2983 | |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 2984 | Value *LHS = Visit(E->getLHS()); |
| 2985 | Value *RHS = Visit(E->getRHS()); |
| 2986 | Value *Zero = llvm::ConstantAggregateZero::get(LHS->getType()); |
Joey Gouly | 52e933b | 2013-02-21 11:49:56 +0000 | [diff] [blame] | 2987 | if (LHS->getType()->isFPOrFPVectorTy()) { |
| 2988 | LHS = Builder.CreateFCmp(llvm::CmpInst::FCMP_UNE, LHS, Zero, "cmp"); |
| 2989 | RHS = Builder.CreateFCmp(llvm::CmpInst::FCMP_UNE, RHS, Zero, "cmp"); |
| 2990 | } else { |
| 2991 | LHS = Builder.CreateICmp(llvm::CmpInst::ICMP_NE, LHS, Zero, "cmp"); |
| 2992 | RHS = Builder.CreateICmp(llvm::CmpInst::ICMP_NE, RHS, Zero, "cmp"); |
| 2993 | } |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 2994 | Value *And = Builder.CreateAnd(LHS, RHS); |
Joey Gouly | 52e933b | 2013-02-21 11:49:56 +0000 | [diff] [blame] | 2995 | return Builder.CreateSExt(And, ConvertType(E->getType()), "sext"); |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 2996 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2997 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2998 | llvm::Type *ResTy = ConvertType(E->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2999 | |
Chris Lattner | 20eb09d | 2008-11-12 08:26:50 +0000 | [diff] [blame] | 3000 | // If we have 0 && RHS, see if we can elide RHS, if so, just return 0. |
| 3001 | // If we have 1 && X, just emit X without inserting the control flow. |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 3002 | bool LHSCondVal; |
| 3003 | if (CGF.ConstantFoldsToSimpleInteger(E->getLHS(), LHSCondVal)) { |
| 3004 | if (LHSCondVal) { // If we have 1 && X, just emit X. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3005 | Cnt.beginRegion(Builder); |
| 3006 | |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 3007 | Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3008 | // ZExt result to int or bool. |
| 3009 | return Builder.CreateZExtOrBitCast(RHSCond, ResTy, "land.ext"); |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 3010 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3011 | |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3012 | // 0 && RHS: If it is safe, just elide the RHS, and return 0/false. |
Chris Lattner | 20eb09d | 2008-11-12 08:26:50 +0000 | [diff] [blame] | 3013 | if (!CGF.ContainsLabel(E->getRHS())) |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3014 | return llvm::Constant::getNullValue(ResTy); |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 3015 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3016 | |
Daniel Dunbar | 9615ecb | 2008-11-13 01:38:36 +0000 | [diff] [blame] | 3017 | llvm::BasicBlock *ContBlock = CGF.createBasicBlock("land.end"); |
| 3018 | llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("land.rhs"); |
Chris Lattner | 20eb09d | 2008-11-12 08:26:50 +0000 | [diff] [blame] | 3019 | |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3020 | CodeGenFunction::ConditionalEvaluation eval(CGF); |
| 3021 | |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3022 | // Branch on the LHS first. If it is false, go to the failure (cont) block. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3023 | CGF.EmitBranchOnBoolExpr(E->getLHS(), RHSBlock, ContBlock, Cnt.getCount()); |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3024 | |
| 3025 | // Any edges into the ContBlock are now from an (indeterminate number of) |
| 3026 | // edges from this first condition. All of these values will be false. Start |
| 3027 | // setting up the PHI node in the Cont Block for this. |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 3028 | llvm::PHINode *PN = llvm::PHINode::Create(llvm::Type::getInt1Ty(VMContext), 2, |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 3029 | "", ContBlock); |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3030 | for (llvm::pred_iterator PI = pred_begin(ContBlock), PE = pred_end(ContBlock); |
| 3031 | PI != PE; ++PI) |
Owen Anderson | 3b144ba | 2009-07-31 17:39:36 +0000 | [diff] [blame] | 3032 | PN->addIncoming(llvm::ConstantInt::getFalse(VMContext), *PI); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3033 | |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3034 | eval.begin(CGF); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3035 | CGF.EmitBlock(RHSBlock); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3036 | Cnt.beginRegion(Builder); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3037 | Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3038 | eval.end(CGF); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3039 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3040 | // Reaquire the RHS block, as there may be subblocks inserted. |
| 3041 | RHSBlock = Builder.GetInsertBlock(); |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3042 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 3043 | // Emit an unconditional branch from this block to ContBlock. |
| 3044 | { |
Devang Patel | acd7236 | 2011-03-30 00:08:31 +0000 | [diff] [blame] | 3045 | // There is no need to emit line number for unconditional branch. |
Stephen Hines | 0e2c34f | 2015-03-23 12:09:02 -0700 | [diff] [blame^] | 3046 | auto NL = ApplyDebugLocation::CreateEmpty(CGF); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 3047 | CGF.EmitBlock(ContBlock); |
| 3048 | } |
| 3049 | // Insert an entry into the phi node for the edge with the value of RHSCond. |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3050 | PN->addIncoming(RHSCond, RHSBlock); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3051 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3052 | // ZExt result to int. |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3053 | return Builder.CreateZExtOrBitCast(PN, ResTy, "land.ext"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3054 | } |
| 3055 | |
| 3056 | Value *ScalarExprEmitter::VisitBinLOr(const BinaryOperator *E) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3057 | RegionCounter Cnt = CGF.getPGORegionCounter(E); |
| 3058 | |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 3059 | // Perform vector logical or on comparisons with zero vectors. |
| 3060 | if (E->getType()->isVectorType()) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3061 | Cnt.beginRegion(Builder); |
| 3062 | |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 3063 | Value *LHS = Visit(E->getLHS()); |
| 3064 | Value *RHS = Visit(E->getRHS()); |
| 3065 | Value *Zero = llvm::ConstantAggregateZero::get(LHS->getType()); |
Joey Gouly | 52e933b | 2013-02-21 11:49:56 +0000 | [diff] [blame] | 3066 | if (LHS->getType()->isFPOrFPVectorTy()) { |
| 3067 | LHS = Builder.CreateFCmp(llvm::CmpInst::FCMP_UNE, LHS, Zero, "cmp"); |
| 3068 | RHS = Builder.CreateFCmp(llvm::CmpInst::FCMP_UNE, RHS, Zero, "cmp"); |
| 3069 | } else { |
| 3070 | LHS = Builder.CreateICmp(llvm::CmpInst::ICMP_NE, LHS, Zero, "cmp"); |
| 3071 | RHS = Builder.CreateICmp(llvm::CmpInst::ICMP_NE, RHS, Zero, "cmp"); |
| 3072 | } |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 3073 | Value *Or = Builder.CreateOr(LHS, RHS); |
Joey Gouly | 52e933b | 2013-02-21 11:49:56 +0000 | [diff] [blame] | 3074 | return Builder.CreateSExt(Or, ConvertType(E->getType()), "sext"); |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 3075 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3076 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3077 | llvm::Type *ResTy = ConvertType(E->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3078 | |
Chris Lattner | 20eb09d | 2008-11-12 08:26:50 +0000 | [diff] [blame] | 3079 | // If we have 1 || RHS, see if we can elide RHS, if so, just return 1. |
| 3080 | // If we have 0 || X, just emit X without inserting the control flow. |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 3081 | bool LHSCondVal; |
| 3082 | if (CGF.ConstantFoldsToSimpleInteger(E->getLHS(), LHSCondVal)) { |
| 3083 | if (!LHSCondVal) { // If we have 0 || X, just emit X. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3084 | Cnt.beginRegion(Builder); |
| 3085 | |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 3086 | Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3087 | // ZExt result to int or bool. |
| 3088 | return Builder.CreateZExtOrBitCast(RHSCond, ResTy, "lor.ext"); |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 3089 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3090 | |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3091 | // 1 || RHS: If it is safe, just elide the RHS, and return 1/true. |
Chris Lattner | 20eb09d | 2008-11-12 08:26:50 +0000 | [diff] [blame] | 3092 | if (!CGF.ContainsLabel(E->getRHS())) |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3093 | return llvm::ConstantInt::get(ResTy, 1); |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 3094 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3095 | |
Daniel Dunbar | 9615ecb | 2008-11-13 01:38:36 +0000 | [diff] [blame] | 3096 | llvm::BasicBlock *ContBlock = CGF.createBasicBlock("lor.end"); |
| 3097 | llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("lor.rhs"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3098 | |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3099 | CodeGenFunction::ConditionalEvaluation eval(CGF); |
| 3100 | |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3101 | // Branch on the LHS first. If it is true, go to the success (cont) block. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3102 | CGF.EmitBranchOnBoolExpr(E->getLHS(), ContBlock, RHSBlock, |
| 3103 | Cnt.getParentCount() - Cnt.getCount()); |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3104 | |
| 3105 | // Any edges into the ContBlock are now from an (indeterminate number of) |
| 3106 | // edges from this first condition. All of these values will be true. Start |
| 3107 | // setting up the PHI node in the Cont Block for this. |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 3108 | llvm::PHINode *PN = llvm::PHINode::Create(llvm::Type::getInt1Ty(VMContext), 2, |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 3109 | "", ContBlock); |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3110 | for (llvm::pred_iterator PI = pred_begin(ContBlock), PE = pred_end(ContBlock); |
| 3111 | PI != PE; ++PI) |
Owen Anderson | 3b144ba | 2009-07-31 17:39:36 +0000 | [diff] [blame] | 3112 | PN->addIncoming(llvm::ConstantInt::getTrue(VMContext), *PI); |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3113 | |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3114 | eval.begin(CGF); |
Anders Carlsson | 33da07d | 2009-06-04 02:53:13 +0000 | [diff] [blame] | 3115 | |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3116 | // Emit the RHS condition as a bool value. |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3117 | CGF.EmitBlock(RHSBlock); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3118 | Cnt.beginRegion(Builder); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3119 | Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3120 | |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3121 | eval.end(CGF); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3122 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3123 | // Reaquire the RHS block, as there may be subblocks inserted. |
| 3124 | RHSBlock = Builder.GetInsertBlock(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3125 | |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3126 | // Emit an unconditional branch from this block to ContBlock. Insert an entry |
| 3127 | // into the phi node for the edge with the value of RHSCond. |
| 3128 | CGF.EmitBlock(ContBlock); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3129 | PN->addIncoming(RHSCond, RHSBlock); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3130 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3131 | // ZExt result to int. |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3132 | return Builder.CreateZExtOrBitCast(PN, ResTy, "lor.ext"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3133 | } |
| 3134 | |
| 3135 | Value *ScalarExprEmitter::VisitBinComma(const BinaryOperator *E) { |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 3136 | CGF.EmitIgnoredExpr(E->getLHS()); |
Daniel Dunbar | a448fb2 | 2008-11-11 23:11:34 +0000 | [diff] [blame] | 3137 | CGF.EnsureInsertPoint(); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3138 | return Visit(E->getRHS()); |
| 3139 | } |
| 3140 | |
| 3141 | //===----------------------------------------------------------------------===// |
| 3142 | // Other Operators |
| 3143 | //===----------------------------------------------------------------------===// |
| 3144 | |
Chris Lattner | 9802a51 | 2008-11-12 08:55:54 +0000 | [diff] [blame] | 3145 | /// isCheapEnoughToEvaluateUnconditionally - Return true if the specified |
| 3146 | /// expression is cheap enough and side-effect-free enough to evaluate |
| 3147 | /// unconditionally instead of conditionally. This is used to convert control |
| 3148 | /// flow into selects in some cases. |
Mike Stump | df317bf | 2009-11-03 23:25:48 +0000 | [diff] [blame] | 3149 | static bool isCheapEnoughToEvaluateUnconditionally(const Expr *E, |
| 3150 | CodeGenFunction &CGF) { |
Chris Lattner | c6bea67 | 2011-04-16 23:15:35 +0000 | [diff] [blame] | 3151 | // Anything that is an integer or floating point constant is fine. |
Nick Lewycky | c569917 | 2013-11-08 23:00:12 +0000 | [diff] [blame] | 3152 | return E->IgnoreParens()->isEvaluatable(CGF.getContext()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3153 | |
Nick Lewycky | c569917 | 2013-11-08 23:00:12 +0000 | [diff] [blame] | 3154 | // Even non-volatile automatic variables can't be evaluated unconditionally. |
| 3155 | // Referencing a thread_local may cause non-trivial initialization work to |
| 3156 | // occur. If we're inside a lambda and one of the variables is from the scope |
| 3157 | // outside the lambda, that function may have returned already. Reading its |
| 3158 | // locals is a bad idea. Also, these reads may introduce races there didn't |
| 3159 | // exist in the source-level program. |
Chris Lattner | 9802a51 | 2008-11-12 08:55:54 +0000 | [diff] [blame] | 3160 | } |
| 3161 | |
| 3162 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3163 | Value *ScalarExprEmitter:: |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3164 | VisitAbstractConditionalOperator(const AbstractConditionalOperator *E) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 3165 | TestAndClearIgnoreResultAssign(); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3166 | |
| 3167 | // Bind the common expression if necessary. |
Eli Friedman | d97927d | 2012-01-06 20:42:20 +0000 | [diff] [blame] | 3168 | CodeGenFunction::OpaqueValueMapping binding(CGF, E); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3169 | RegionCounter Cnt = CGF.getPGORegionCounter(E); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3170 | |
| 3171 | Expr *condExpr = E->getCond(); |
| 3172 | Expr *lhsExpr = E->getTrueExpr(); |
| 3173 | Expr *rhsExpr = E->getFalseExpr(); |
| 3174 | |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 3175 | // If the condition constant folds and can be elided, try to avoid emitting |
| 3176 | // the condition and the dead arm. |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 3177 | bool CondExprBool; |
| 3178 | if (CGF.ConstantFoldsToSimpleInteger(condExpr, CondExprBool)) { |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3179 | Expr *live = lhsExpr, *dead = rhsExpr; |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 3180 | if (!CondExprBool) std::swap(live, dead); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3181 | |
Eli Friedman | c8645e3 | 2011-10-15 02:10:40 +0000 | [diff] [blame] | 3182 | // If the dead side doesn't have labels we need, just emit the Live part. |
| 3183 | if (!CGF.ContainsLabel(dead)) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3184 | if (CondExprBool) |
| 3185 | Cnt.beginRegion(Builder); |
Eli Friedman | c8645e3 | 2011-10-15 02:10:40 +0000 | [diff] [blame] | 3186 | Value *Result = Visit(live); |
| 3187 | |
| 3188 | // If the live part is a throw expression, it acts like it has a void |
| 3189 | // type, so evaluating it returns a null Value*. However, a conditional |
| 3190 | // with non-void type must return a non-null Value*. |
| 3191 | if (!Result && !E->getType()->isVoidType()) |
| 3192 | Result = llvm::UndefValue::get(CGF.ConvertType(E->getType())); |
| 3193 | |
| 3194 | return Result; |
| 3195 | } |
Chris Lattner | c657e92 | 2008-11-11 18:56:45 +0000 | [diff] [blame] | 3196 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3197 | |
Nate Begeman | 6155d73 | 2010-09-20 22:41:17 +0000 | [diff] [blame] | 3198 | // OpenCL: If the condition is a vector, we can treat this condition like |
| 3199 | // the select function. |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3200 | if (CGF.getLangOpts().OpenCL |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3201 | && condExpr->getType()->isVectorType()) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3202 | Cnt.beginRegion(Builder); |
| 3203 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3204 | llvm::Value *CondV = CGF.EmitScalarExpr(condExpr); |
| 3205 | llvm::Value *LHS = Visit(lhsExpr); |
| 3206 | llvm::Value *RHS = Visit(rhsExpr); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3207 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3208 | llvm::Type *condType = ConvertType(condExpr->getType()); |
| 3209 | llvm::VectorType *vecTy = cast<llvm::VectorType>(condType); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3210 | |
| 3211 | unsigned numElem = vecTy->getNumElements(); |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3212 | llvm::Type *elemType = vecTy->getElementType(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3213 | |
Chris Lattner | 2ce8842 | 2012-01-25 05:34:41 +0000 | [diff] [blame] | 3214 | llvm::Value *zeroVec = llvm::Constant::getNullValue(vecTy); |
Nate Begeman | 6155d73 | 2010-09-20 22:41:17 +0000 | [diff] [blame] | 3215 | llvm::Value *TestMSB = Builder.CreateICmpSLT(CondV, zeroVec); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3216 | llvm::Value *tmp = Builder.CreateSExt(TestMSB, |
Nate Begeman | 6155d73 | 2010-09-20 22:41:17 +0000 | [diff] [blame] | 3217 | llvm::VectorType::get(elemType, |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3218 | numElem), |
Nate Begeman | 6155d73 | 2010-09-20 22:41:17 +0000 | [diff] [blame] | 3219 | "sext"); |
| 3220 | llvm::Value *tmp2 = Builder.CreateNot(tmp); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3221 | |
Nate Begeman | 6155d73 | 2010-09-20 22:41:17 +0000 | [diff] [blame] | 3222 | // Cast float to int to perform ANDs if necessary. |
| 3223 | llvm::Value *RHSTmp = RHS; |
| 3224 | llvm::Value *LHSTmp = LHS; |
| 3225 | bool wasCast = false; |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3226 | llvm::VectorType *rhsVTy = cast<llvm::VectorType>(RHS->getType()); |
Peter Collingbourne | 565204d | 2012-05-29 00:35:18 +0000 | [diff] [blame] | 3227 | if (rhsVTy->getElementType()->isFloatingPointTy()) { |
Nate Begeman | 6155d73 | 2010-09-20 22:41:17 +0000 | [diff] [blame] | 3228 | RHSTmp = Builder.CreateBitCast(RHS, tmp2->getType()); |
| 3229 | LHSTmp = Builder.CreateBitCast(LHS, tmp->getType()); |
| 3230 | wasCast = true; |
| 3231 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3232 | |
Nate Begeman | 6155d73 | 2010-09-20 22:41:17 +0000 | [diff] [blame] | 3233 | llvm::Value *tmp3 = Builder.CreateAnd(RHSTmp, tmp2); |
| 3234 | llvm::Value *tmp4 = Builder.CreateAnd(LHSTmp, tmp); |
| 3235 | llvm::Value *tmp5 = Builder.CreateOr(tmp3, tmp4, "cond"); |
| 3236 | if (wasCast) |
| 3237 | tmp5 = Builder.CreateBitCast(tmp5, RHS->getType()); |
| 3238 | |
| 3239 | return tmp5; |
| 3240 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3241 | |
Chris Lattner | 9802a51 | 2008-11-12 08:55:54 +0000 | [diff] [blame] | 3242 | // If this is a really simple expression (like x ? 4 : 5), emit this as a |
| 3243 | // select instead of as control flow. We can only do this if it is cheap and |
Chris Lattner | 531a550 | 2008-11-16 06:16:27 +0000 | [diff] [blame] | 3244 | // safe to evaluate the LHS and RHS unconditionally. |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3245 | if (isCheapEnoughToEvaluateUnconditionally(lhsExpr, CGF) && |
| 3246 | isCheapEnoughToEvaluateUnconditionally(rhsExpr, CGF)) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3247 | Cnt.beginRegion(Builder); |
| 3248 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3249 | llvm::Value *CondV = CGF.EvaluateExprAsBool(condExpr); |
| 3250 | llvm::Value *LHS = Visit(lhsExpr); |
| 3251 | llvm::Value *RHS = Visit(rhsExpr); |
Eli Friedman | 1e4f68c | 2011-12-08 22:01:56 +0000 | [diff] [blame] | 3252 | if (!LHS) { |
| 3253 | // If the conditional has void type, make sure we return a null Value*. |
| 3254 | assert(!RHS && "LHS and RHS types must match"); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 3255 | return nullptr; |
Eli Friedman | 1e4f68c | 2011-12-08 22:01:56 +0000 | [diff] [blame] | 3256 | } |
Chris Lattner | 9802a51 | 2008-11-12 08:55:54 +0000 | [diff] [blame] | 3257 | return Builder.CreateSelect(CondV, LHS, RHS, "cond"); |
| 3258 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3259 | |
Daniel Dunbar | be65abc | 2008-11-12 10:13:37 +0000 | [diff] [blame] | 3260 | llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); |
| 3261 | llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); |
Daniel Dunbar | 9615ecb | 2008-11-13 01:38:36 +0000 | [diff] [blame] | 3262 | llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3263 | |
| 3264 | CodeGenFunction::ConditionalEvaluation eval(CGF); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3265 | CGF.EmitBranchOnBoolExpr(condExpr, LHSBlock, RHSBlock, Cnt.getCount()); |
Anders Carlsson | fb6fa30 | 2009-06-04 03:00:32 +0000 | [diff] [blame] | 3266 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3267 | CGF.EmitBlock(LHSBlock); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3268 | Cnt.beginRegion(Builder); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3269 | eval.begin(CGF); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3270 | Value *LHS = Visit(lhsExpr); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3271 | eval.end(CGF); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3272 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3273 | LHSBlock = Builder.GetInsertBlock(); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3274 | Builder.CreateBr(ContBlock); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3275 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3276 | CGF.EmitBlock(RHSBlock); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3277 | eval.begin(CGF); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3278 | Value *RHS = Visit(rhsExpr); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3279 | eval.end(CGF); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3280 | |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3281 | RHSBlock = Builder.GetInsertBlock(); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3282 | CGF.EmitBlock(ContBlock); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3283 | |
Eli Friedman | 48daf59 | 2009-12-07 20:25:53 +0000 | [diff] [blame] | 3284 | // If the LHS or RHS is a throw expression, it will be legitimately null. |
| 3285 | if (!LHS) |
| 3286 | return RHS; |
| 3287 | if (!RHS) |
| 3288 | return LHS; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3289 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3290 | // Create a PHI node for the real part. |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 3291 | llvm::PHINode *PN = Builder.CreatePHI(LHS->getType(), 2, "cond"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3292 | PN->addIncoming(LHS, LHSBlock); |
| 3293 | PN->addIncoming(RHS, RHSBlock); |
| 3294 | return PN; |
| 3295 | } |
| 3296 | |
| 3297 | Value *ScalarExprEmitter::VisitChooseExpr(ChooseExpr *E) { |
Eli Friedman | a5e6601 | 2013-07-20 00:40:58 +0000 | [diff] [blame] | 3298 | return Visit(E->getChosenSubExpr()); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3299 | } |
| 3300 | |
Chris Lattner | 2202bce | 2007-11-30 17:56:23 +0000 | [diff] [blame] | 3301 | Value *ScalarExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 3302 | QualType Ty = VE->getType(); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 3303 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 3304 | if (Ty->isVariablyModifiedType()) |
| 3305 | CGF.EmitVariablyModifiedType(Ty); |
| 3306 | |
Eli Friedman | 4fd0aa5 | 2009-01-20 17:46:04 +0000 | [diff] [blame] | 3307 | llvm::Value *ArgValue = CGF.EmitVAListRef(VE->getSubExpr()); |
Anders Carlsson | ddf7cac | 2008-11-04 05:30:00 +0000 | [diff] [blame] | 3308 | llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType()); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 3309 | llvm::Type *ArgTy = ConvertType(VE->getType()); |
Anders Carlsson | ddf7cac | 2008-11-04 05:30:00 +0000 | [diff] [blame] | 3310 | |
| 3311 | // If EmitVAArg fails, we fall back to the LLVM instruction. |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3312 | if (!ArgPtr) |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 3313 | return Builder.CreateVAArg(ArgValue, ArgTy); |
Anders Carlsson | ddf7cac | 2008-11-04 05:30:00 +0000 | [diff] [blame] | 3314 | |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 3315 | // FIXME Volatility. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 3316 | llvm::Value *Val = Builder.CreateLoad(ArgPtr); |
| 3317 | |
| 3318 | // If EmitVAArg promoted the type, we must truncate it. |
Stephen Hines | 0e2c34f | 2015-03-23 12:09:02 -0700 | [diff] [blame^] | 3319 | if (ArgTy != Val->getType()) { |
| 3320 | if (ArgTy->isPointerTy() && !Val->getType()->isPointerTy()) |
| 3321 | Val = Builder.CreateIntToPtr(Val, ArgTy); |
| 3322 | else |
| 3323 | Val = Builder.CreateTrunc(Val, ArgTy); |
| 3324 | } |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 3325 | |
| 3326 | return Val; |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 3327 | } |
| 3328 | |
John McCall | 6b5a61b | 2011-02-07 10:33:21 +0000 | [diff] [blame] | 3329 | Value *ScalarExprEmitter::VisitBlockExpr(const BlockExpr *block) { |
| 3330 | return CGF.EmitBlockLiteral(block); |
Mike Stump | df6b68c | 2009-02-12 18:29:15 +0000 | [diff] [blame] | 3331 | } |
| 3332 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3333 | Value *ScalarExprEmitter::VisitAsTypeExpr(AsTypeExpr *E) { |
| 3334 | Value *Src = CGF.EmitScalarExpr(E->getSrcExpr()); |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3335 | llvm::Type *DstTy = ConvertType(E->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3336 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3337 | // Going from vec4->vec3 or vec3->vec4 is a special case and requires |
| 3338 | // a shuffle vector instead of a bitcast. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3339 | llvm::Type *SrcTy = Src->getType(); |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3340 | if (isa<llvm::VectorType>(DstTy) && isa<llvm::VectorType>(SrcTy)) { |
| 3341 | unsigned numElementsDst = cast<llvm::VectorType>(DstTy)->getNumElements(); |
| 3342 | unsigned numElementsSrc = cast<llvm::VectorType>(SrcTy)->getNumElements(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3343 | if ((numElementsDst == 3 && numElementsSrc == 4) |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3344 | || (numElementsDst == 4 && numElementsSrc == 3)) { |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3345 | |
| 3346 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3347 | // In the case of going from int4->float3, a bitcast is needed before |
| 3348 | // doing a shuffle. |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3349 | llvm::Type *srcElemTy = |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3350 | cast<llvm::VectorType>(SrcTy)->getElementType(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3351 | llvm::Type *dstElemTy = |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3352 | cast<llvm::VectorType>(DstTy)->getElementType(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3353 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3354 | if ((srcElemTy->isIntegerTy() && dstElemTy->isFloatTy()) |
| 3355 | || (srcElemTy->isFloatTy() && dstElemTy->isIntegerTy())) { |
| 3356 | // Create a float type of the same size as the source or destination. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3357 | llvm::VectorType *newSrcTy = llvm::VectorType::get(dstElemTy, |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3358 | numElementsSrc); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3359 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3360 | Src = Builder.CreateBitCast(Src, newSrcTy, "astypeCast"); |
| 3361 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3362 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3363 | llvm::Value *UnV = llvm::UndefValue::get(Src->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3364 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 3365 | SmallVector<llvm::Constant*, 3> Args; |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3366 | Args.push_back(Builder.getInt32(0)); |
| 3367 | Args.push_back(Builder.getInt32(1)); |
| 3368 | Args.push_back(Builder.getInt32(2)); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3369 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3370 | if (numElementsDst == 4) |
Chris Lattner | 8b41868 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 3371 | Args.push_back(llvm::UndefValue::get(CGF.Int32Ty)); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3372 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3373 | llvm::Constant *Mask = llvm::ConstantVector::get(Args); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3374 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3375 | return Builder.CreateShuffleVector(Src, UnV, Mask, "astype"); |
| 3376 | } |
| 3377 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3378 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3379 | return Builder.CreateBitCast(Src, DstTy, "astype"); |
| 3380 | } |
| 3381 | |
Eli Friedman | 276b061 | 2011-10-11 02:20:01 +0000 | [diff] [blame] | 3382 | Value *ScalarExprEmitter::VisitAtomicExpr(AtomicExpr *E) { |
| 3383 | return CGF.EmitAtomicExpr(E).getScalarVal(); |
| 3384 | } |
| 3385 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3386 | //===----------------------------------------------------------------------===// |
| 3387 | // Entry Point into this File |
| 3388 | //===----------------------------------------------------------------------===// |
| 3389 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3390 | /// EmitScalarExpr - Emit the computation of the specified expression of scalar |
| 3391 | /// type, ignoring the result. |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 3392 | Value *CodeGenFunction::EmitScalarExpr(const Expr *E, bool IgnoreResultAssign) { |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 3393 | assert(E && hasScalarEvaluationKind(E->getType()) && |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3394 | "Invalid scalar expression to emit"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3395 | |
Stephen Hines | 0e2c34f | 2015-03-23 12:09:02 -0700 | [diff] [blame^] | 3396 | return ScalarExprEmitter(*this, IgnoreResultAssign) |
| 3397 | .Visit(const_cast<Expr *>(E)); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3398 | } |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 3399 | |
| 3400 | /// EmitScalarConversion - Emit a conversion from the specified type to the |
| 3401 | /// specified destination type, both of which are LLVM scalar types. |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 3402 | Value *CodeGenFunction::EmitScalarConversion(Value *Src, QualType SrcTy, |
| 3403 | QualType DstTy) { |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 3404 | assert(hasScalarEvaluationKind(SrcTy) && hasScalarEvaluationKind(DstTy) && |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 3405 | "Invalid scalar expression to emit"); |
| 3406 | return ScalarExprEmitter(*this).EmitScalarConversion(Src, SrcTy, DstTy); |
| 3407 | } |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 3408 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3409 | /// EmitComplexToScalarConversion - Emit a conversion from the specified complex |
| 3410 | /// type to the specified destination type, where the destination type is an |
| 3411 | /// LLVM scalar type. |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 3412 | Value *CodeGenFunction::EmitComplexToScalarConversion(ComplexPairTy Src, |
| 3413 | QualType SrcTy, |
| 3414 | QualType DstTy) { |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 3415 | assert(SrcTy->isAnyComplexType() && hasScalarEvaluationKind(DstTy) && |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 3416 | "Invalid complex -> scalar conversion"); |
| 3417 | return ScalarExprEmitter(*this).EmitComplexToScalarConversion(Src, SrcTy, |
| 3418 | DstTy); |
| 3419 | } |
Anders Carlsson | cc23aca | 2007-12-10 19:35:18 +0000 | [diff] [blame] | 3420 | |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 3421 | |
| 3422 | llvm::Value *CodeGenFunction:: |
| 3423 | EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV, |
| 3424 | bool isInc, bool isPre) { |
| 3425 | return ScalarExprEmitter(*this).EmitScalarPrePostIncDec(E, LV, isInc, isPre); |
| 3426 | } |
| 3427 | |
Fariborz Jahanian | 820bca4 | 2009-12-09 23:35:29 +0000 | [diff] [blame] | 3428 | LValue CodeGenFunction::EmitObjCIsaExpr(const ObjCIsaExpr *E) { |
| 3429 | llvm::Value *V; |
| 3430 | // object->isa or (*object).isa |
| 3431 | // Generate code as for: *(Class*)object |
Fariborz Jahanian | 820bca4 | 2009-12-09 23:35:29 +0000 | [diff] [blame] | 3432 | // build Class* type |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3433 | llvm::Type *ClassPtrTy = ConvertType(E->getType()); |
Fariborz Jahanian | 5ed676c | 2010-02-05 19:18:30 +0000 | [diff] [blame] | 3434 | |
| 3435 | Expr *BaseExpr = E->getBase(); |
John McCall | 7eb0a9e | 2010-11-24 05:12:34 +0000 | [diff] [blame] | 3436 | if (BaseExpr->isRValue()) { |
Eli Friedman | d71f442 | 2011-12-19 23:03:09 +0000 | [diff] [blame] | 3437 | V = CreateMemTemp(E->getType(), "resval"); |
Fariborz Jahanian | 5ed676c | 2010-02-05 19:18:30 +0000 | [diff] [blame] | 3438 | llvm::Value *Src = EmitScalarExpr(BaseExpr); |
| 3439 | Builder.CreateStore(Src, V); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 3440 | V = ScalarExprEmitter(*this).EmitLoadOfLValue( |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 3441 | MakeNaturalAlignAddrLValue(V, E->getType()), E->getExprLoc()); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 3442 | } else { |
| 3443 | if (E->isArrow()) |
| 3444 | V = ScalarExprEmitter(*this).EmitLoadOfLValue(BaseExpr); |
| 3445 | else |
| 3446 | V = EmitLValue(BaseExpr).getAddress(); |
Fariborz Jahanian | 5ed676c | 2010-02-05 19:18:30 +0000 | [diff] [blame] | 3447 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3448 | |
Fariborz Jahanian | 5ed676c | 2010-02-05 19:18:30 +0000 | [diff] [blame] | 3449 | // build Class* type |
Fariborz Jahanian | 820bca4 | 2009-12-09 23:35:29 +0000 | [diff] [blame] | 3450 | ClassPtrTy = ClassPtrTy->getPointerTo(); |
| 3451 | V = Builder.CreateBitCast(V, ClassPtrTy); |
Eli Friedman | d71f442 | 2011-12-19 23:03:09 +0000 | [diff] [blame] | 3452 | return MakeNaturalAlignAddrLValue(V, E->getType()); |
Fariborz Jahanian | 820bca4 | 2009-12-09 23:35:29 +0000 | [diff] [blame] | 3453 | } |
| 3454 | |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 3455 | |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 3456 | LValue CodeGenFunction::EmitCompoundAssignmentLValue( |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 3457 | const CompoundAssignOperator *E) { |
| 3458 | ScalarExprEmitter Scalar(*this); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 3459 | Value *Result = nullptr; |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 3460 | switch (E->getOpcode()) { |
| 3461 | #define COMPOUND_OP(Op) \ |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 3462 | case BO_##Op##Assign: \ |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 3463 | return Scalar.EmitCompoundAssignLValue(E, &ScalarExprEmitter::Emit##Op, \ |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 3464 | Result) |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 3465 | COMPOUND_OP(Mul); |
| 3466 | COMPOUND_OP(Div); |
| 3467 | COMPOUND_OP(Rem); |
| 3468 | COMPOUND_OP(Add); |
| 3469 | COMPOUND_OP(Sub); |
| 3470 | COMPOUND_OP(Shl); |
| 3471 | COMPOUND_OP(Shr); |
| 3472 | COMPOUND_OP(And); |
| 3473 | COMPOUND_OP(Xor); |
| 3474 | COMPOUND_OP(Or); |
| 3475 | #undef COMPOUND_OP |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3476 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 3477 | case BO_PtrMemD: |
| 3478 | case BO_PtrMemI: |
| 3479 | case BO_Mul: |
| 3480 | case BO_Div: |
| 3481 | case BO_Rem: |
| 3482 | case BO_Add: |
| 3483 | case BO_Sub: |
| 3484 | case BO_Shl: |
| 3485 | case BO_Shr: |
| 3486 | case BO_LT: |
| 3487 | case BO_GT: |
| 3488 | case BO_LE: |
| 3489 | case BO_GE: |
| 3490 | case BO_EQ: |
| 3491 | case BO_NE: |
| 3492 | case BO_And: |
| 3493 | case BO_Xor: |
| 3494 | case BO_Or: |
| 3495 | case BO_LAnd: |
| 3496 | case BO_LOr: |
| 3497 | case BO_Assign: |
| 3498 | case BO_Comma: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 3499 | llvm_unreachable("Not valid compound assignment operators"); |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 3500 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3501 | |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 3502 | llvm_unreachable("Unhandled compound assignment operator"); |
| 3503 | } |