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) { |
Fariborz Jahanian | af9b968 | 2010-09-17 15:51:28 +0000 | [diff] [blame] | 199 | return StmtVisitor<ScalarExprEmitter, Value*>::Visit(E); |
| 200 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 201 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 202 | Value *VisitStmt(Stmt *S) { |
Ted Kremenek | 7a9d49f | 2007-12-11 21:27:55 +0000 | [diff] [blame] | 203 | S->dump(CGF.getContext().getSourceManager()); |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 204 | llvm_unreachable("Stmt can't have complex result type!"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 205 | } |
| 206 | Value *VisitExpr(Expr *S); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 207 | |
Fariborz Jahanian | af9b968 | 2010-09-17 15:51:28 +0000 | [diff] [blame] | 208 | Value *VisitParenExpr(ParenExpr *PE) { |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 209 | return Visit(PE->getSubExpr()); |
Fariborz Jahanian | af9b968 | 2010-09-17 15:51:28 +0000 | [diff] [blame] | 210 | } |
John McCall | 91a5755 | 2011-07-15 05:09:51 +0000 | [diff] [blame] | 211 | Value *VisitSubstNonTypeTemplateParmExpr(SubstNonTypeTemplateParmExpr *E) { |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 212 | return Visit(E->getReplacement()); |
John McCall | 91a5755 | 2011-07-15 05:09:51 +0000 | [diff] [blame] | 213 | } |
Peter Collingbourne | f111d93 | 2011-04-15 00:35:48 +0000 | [diff] [blame] | 214 | Value *VisitGenericSelectionExpr(GenericSelectionExpr *GE) { |
| 215 | return Visit(GE->getResultExpr()); |
| 216 | } |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 217 | |
| 218 | // Leaves. |
| 219 | Value *VisitIntegerLiteral(const IntegerLiteral *E) { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 220 | return Builder.getInt(E->getValue()); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 221 | } |
| 222 | Value *VisitFloatingLiteral(const FloatingLiteral *E) { |
Owen Anderson | bc0a222 | 2009-07-27 21:00:51 +0000 | [diff] [blame] | 223 | return llvm::ConstantFP::get(VMContext, E->getValue()); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 224 | } |
| 225 | Value *VisitCharacterLiteral(const CharacterLiteral *E) { |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 226 | return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue()); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 227 | } |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 228 | Value *VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *E) { |
| 229 | return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue()); |
| 230 | } |
Nate Begeman | e7579b5 | 2007-11-15 05:40:03 +0000 | [diff] [blame] | 231 | Value *VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 232 | return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue()); |
Nate Begeman | e7579b5 | 2007-11-15 05:40:03 +0000 | [diff] [blame] | 233 | } |
Douglas Gregor | ed8abf1 | 2010-07-08 06:14:04 +0000 | [diff] [blame] | 234 | Value *VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *E) { |
Anders Carlsson | a40a9f3 | 2010-05-22 17:45:10 +0000 | [diff] [blame] | 235 | return EmitNullValue(E->getType()); |
Argyrios Kyrtzidis | 7267f78 | 2008-08-23 19:35:47 +0000 | [diff] [blame] | 236 | } |
Anders Carlsson | 3f70456 | 2008-12-21 22:39:40 +0000 | [diff] [blame] | 237 | Value *VisitGNUNullExpr(const GNUNullExpr *E) { |
Anders Carlsson | a40a9f3 | 2010-05-22 17:45:10 +0000 | [diff] [blame] | 238 | return EmitNullValue(E->getType()); |
Anders Carlsson | 3f70456 | 2008-12-21 22:39:40 +0000 | [diff] [blame] | 239 | } |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 240 | Value *VisitOffsetOfExpr(OffsetOfExpr *E); |
Peter Collingbourne | f4e3cfb | 2011-03-11 19:24:49 +0000 | [diff] [blame] | 241 | Value *VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *E); |
Daniel Dunbar | 0ffb125 | 2008-08-04 16:51:22 +0000 | [diff] [blame] | 242 | Value *VisitAddrLabelExpr(const AddrLabelExpr *E) { |
Chris Lattner | d9becd1 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 243 | llvm::Value *V = CGF.GetAddrOfLabel(E->getLabel()); |
| 244 | return Builder.CreateBitCast(V, ConvertType(E->getType())); |
Daniel Dunbar | 0ffb125 | 2008-08-04 16:51:22 +0000 | [diff] [blame] | 245 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 246 | |
Douglas Gregor | 9370c8f | 2011-01-12 22:11:34 +0000 | [diff] [blame] | 247 | Value *VisitSizeOfPackExpr(SizeOfPackExpr *E) { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 248 | return llvm::ConstantInt::get(ConvertType(E->getType()),E->getPackLength()); |
Douglas Gregor | 9370c8f | 2011-01-12 22:11:34 +0000 | [diff] [blame] | 249 | } |
John McCall | e996ffd | 2011-02-16 08:02:54 +0000 | [diff] [blame] | 250 | |
John McCall | 4b9c2d2 | 2011-11-06 09:01:30 +0000 | [diff] [blame] | 251 | Value *VisitPseudoObjectExpr(PseudoObjectExpr *E) { |
| 252 | return CGF.EmitPseudoObjectRValue(E).getScalarVal(); |
| 253 | } |
| 254 | |
John McCall | e996ffd | 2011-02-16 08:02:54 +0000 | [diff] [blame] | 255 | Value *VisitOpaqueValueExpr(OpaqueValueExpr *E) { |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 256 | if (E->isGLValue()) |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 257 | return EmitLoadOfLValue(CGF.getOpaqueLValueMapping(E), E->getExprLoc()); |
John McCall | e996ffd | 2011-02-16 08:02:54 +0000 | [diff] [blame] | 258 | |
| 259 | // Otherwise, assume the mapping is the scalar directly. |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 260 | return CGF.getOpaqueRValueMapping(E).getScalarVal(); |
John McCall | e996ffd | 2011-02-16 08:02:54 +0000 | [diff] [blame] | 261 | } |
John McCall | dd2ecee | 2012-03-10 03:05:10 +0000 | [diff] [blame] | 262 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 263 | // l-values. |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 264 | Value *VisitDeclRefExpr(DeclRefExpr *E) { |
| 265 | if (CodeGenFunction::ConstantEmission result = CGF.tryEmitAsConstant(E)) { |
John McCall | dd2ecee | 2012-03-10 03:05:10 +0000 | [diff] [blame] | 266 | if (result.isReference()) |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 267 | return EmitLoadOfLValue(result.getReferenceLValue(CGF, E), |
| 268 | E->getExprLoc()); |
John McCall | dd2ecee | 2012-03-10 03:05:10 +0000 | [diff] [blame] | 269 | return result.getValue(); |
Richard Smith | a3ca41f | 2012-03-02 23:27:11 +0000 | [diff] [blame] | 270 | } |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 271 | return EmitLoadOfLValue(E); |
John McCall | dd2ecee | 2012-03-10 03:05:10 +0000 | [diff] [blame] | 272 | } |
| 273 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 274 | Value *VisitObjCSelectorExpr(ObjCSelectorExpr *E) { |
| 275 | return CGF.EmitObjCSelectorExpr(E); |
Daniel Dunbar | 9c3fc70 | 2008-08-27 06:57:25 +0000 | [diff] [blame] | 276 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 277 | Value *VisitObjCProtocolExpr(ObjCProtocolExpr *E) { |
| 278 | return CGF.EmitObjCProtocolExpr(E); |
Daniel Dunbar | 9c3fc70 | 2008-08-27 06:57:25 +0000 | [diff] [blame] | 279 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 280 | Value *VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { |
Daniel Dunbar | 9c3fc70 | 2008-08-27 06:57:25 +0000 | [diff] [blame] | 281 | return EmitLoadOfLValue(E); |
| 282 | } |
Daniel Dunbar | 9c3fc70 | 2008-08-27 06:57:25 +0000 | [diff] [blame] | 283 | Value *VisitObjCMessageExpr(ObjCMessageExpr *E) { |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 284 | if (E->getMethodDecl() && |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 285 | E->getMethodDecl()->getReturnType()->isReferenceType()) |
Fariborz Jahanian | 180ff3a | 2011-03-02 20:09:49 +0000 | [diff] [blame] | 286 | return EmitLoadOfLValue(E); |
Daniel Dunbar | 9c3fc70 | 2008-08-27 06:57:25 +0000 | [diff] [blame] | 287 | return CGF.EmitObjCMessageExpr(E).getScalarVal(); |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 288 | } |
| 289 | |
Fariborz Jahanian | 83dc325 | 2009-12-09 19:05:56 +0000 | [diff] [blame] | 290 | Value *VisitObjCIsaExpr(ObjCIsaExpr *E) { |
Fariborz Jahanian | 820bca4 | 2009-12-09 23:35:29 +0000 | [diff] [blame] | 291 | LValue LV = CGF.EmitObjCIsaExpr(E); |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 292 | Value *V = CGF.EmitLoadOfLValue(LV, E->getExprLoc()).getScalarVal(); |
Fariborz Jahanian | 83dc325 | 2009-12-09 19:05:56 +0000 | [diff] [blame] | 293 | return V; |
| 294 | } |
| 295 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 296 | Value *VisitArraySubscriptExpr(ArraySubscriptExpr *E); |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 297 | Value *VisitShuffleVectorExpr(ShuffleVectorExpr *E); |
Hal Finkel | 414a1bd | 2013-09-18 03:29:45 +0000 | [diff] [blame] | 298 | Value *VisitConvertVectorExpr(ConvertVectorExpr *E); |
Eli Friedman | 2866527 | 2009-11-26 03:22:21 +0000 | [diff] [blame] | 299 | Value *VisitMemberExpr(MemberExpr *E); |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 300 | Value *VisitExtVectorElementExpr(Expr *E) { return EmitLoadOfLValue(E); } |
Chris Lattner | be20bb5 | 2008-10-26 23:53:12 +0000 | [diff] [blame] | 301 | Value *VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { |
| 302 | return EmitLoadOfLValue(E); |
| 303 | } |
Devang Patel | 35634f5 | 2007-10-24 17:18:43 +0000 | [diff] [blame] | 304 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 305 | Value *VisitInitListExpr(InitListExpr *E); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 306 | |
Douglas Gregor | 3498bdb | 2009-01-29 17:44:32 +0000 | [diff] [blame] | 307 | Value *VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) { |
Richard Smith | 0dbe2fb | 2012-12-21 03:17:28 +0000 | [diff] [blame] | 308 | return EmitNullValue(E->getType()); |
Douglas Gregor | 3498bdb | 2009-01-29 17:44:32 +0000 | [diff] [blame] | 309 | } |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 310 | Value *VisitExplicitCastExpr(ExplicitCastExpr *E) { |
Fariborz Jahanian | 745da3a | 2010-09-24 17:30:16 +0000 | [diff] [blame] | 311 | if (E->getType()->isVariablyModifiedType()) |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 312 | CGF.EmitVariablyModifiedType(E->getType()); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 313 | |
| 314 | if (CGDebugInfo *DI = CGF.getDebugInfo()) |
| 315 | DI->EmitExplicitCastType(E->getType()); |
| 316 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 317 | return VisitCastExpr(E); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 318 | } |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 319 | Value *VisitCastExpr(CastExpr *E); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 320 | |
| 321 | Value *VisitCallExpr(const CallExpr *E) { |
Anders Carlsson | e9f2f45 | 2009-05-27 03:37:57 +0000 | [diff] [blame] | 322 | if (E->getCallReturnType()->isReferenceType()) |
| 323 | return EmitLoadOfLValue(E); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 324 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 325 | Value *V = CGF.EmitCallExpr(E).getScalarVal(); |
| 326 | |
| 327 | EmitLValueAlignmentAssumption(E, V); |
| 328 | return V; |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 329 | } |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 330 | |
Chris Lattner | 3379320 | 2007-08-31 22:09:40 +0000 | [diff] [blame] | 331 | Value *VisitStmtExpr(const StmtExpr *E); |
Mike Stump | 4e7a1f7 | 2009-02-21 20:00:35 +0000 | [diff] [blame] | 332 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 333 | // Unary Operators. |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 334 | Value *VisitUnaryPostDec(const UnaryOperator *E) { |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 335 | LValue LV = EmitLValue(E->getSubExpr()); |
| 336 | return EmitScalarPrePostIncDec(E, LV, false, false); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 337 | } |
| 338 | Value *VisitUnaryPostInc(const UnaryOperator *E) { |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 339 | LValue LV = EmitLValue(E->getSubExpr()); |
| 340 | return EmitScalarPrePostIncDec(E, LV, true, false); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 341 | } |
| 342 | Value *VisitUnaryPreDec(const UnaryOperator *E) { |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 343 | LValue LV = EmitLValue(E->getSubExpr()); |
| 344 | return EmitScalarPrePostIncDec(E, LV, false, true); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 345 | } |
| 346 | Value *VisitUnaryPreInc(const UnaryOperator *E) { |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 347 | LValue LV = EmitLValue(E->getSubExpr()); |
| 348 | return EmitScalarPrePostIncDec(E, LV, true, true); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 349 | } |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 350 | |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 351 | llvm::Value *EmitAddConsiderOverflowBehavior(const UnaryOperator *E, |
| 352 | llvm::Value *InVal, |
| 353 | llvm::Value *NextVal, |
| 354 | bool IsInc); |
| 355 | |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 356 | llvm::Value *EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV, |
| 357 | bool isInc, bool isPre); |
| 358 | |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 359 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 360 | Value *VisitUnaryAddrOf(const UnaryOperator *E) { |
John McCall | 5808ce4 | 2011-02-03 08:15:49 +0000 | [diff] [blame] | 361 | if (isa<MemberPointerType>(E->getType())) // never sugared |
| 362 | return CGF.CGM.getMemberPointerConstant(E); |
| 363 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 364 | return EmitLValue(E->getSubExpr()).getAddress(); |
| 365 | } |
John McCall | fd56900 | 2010-12-04 12:43:24 +0000 | [diff] [blame] | 366 | Value *VisitUnaryDeref(const UnaryOperator *E) { |
| 367 | if (E->getType()->isVoidType()) |
| 368 | return Visit(E->getSubExpr()); // the actual value should be unused |
| 369 | return EmitLoadOfLValue(E); |
| 370 | } |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 371 | Value *VisitUnaryPlus(const UnaryOperator *E) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 372 | // This differs from gcc, though, most likely due to a bug in gcc. |
| 373 | TestAndClearIgnoreResultAssign(); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 374 | return Visit(E->getSubExpr()); |
| 375 | } |
| 376 | Value *VisitUnaryMinus (const UnaryOperator *E); |
| 377 | Value *VisitUnaryNot (const UnaryOperator *E); |
| 378 | Value *VisitUnaryLNot (const UnaryOperator *E); |
Chris Lattner | 46f93d0 | 2007-08-24 21:20:17 +0000 | [diff] [blame] | 379 | Value *VisitUnaryReal (const UnaryOperator *E); |
| 380 | Value *VisitUnaryImag (const UnaryOperator *E); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 381 | Value *VisitUnaryExtension(const UnaryOperator *E) { |
| 382 | return Visit(E->getSubExpr()); |
| 383 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 384 | |
Anders Carlsson | 5f4307b | 2009-04-14 16:58:56 +0000 | [diff] [blame] | 385 | // C++ |
Douglas Gregor | 3f86ce1 | 2011-08-09 00:37:14 +0000 | [diff] [blame] | 386 | Value *VisitMaterializeTemporaryExpr(const MaterializeTemporaryExpr *E) { |
Eli Friedman | ec24b0e | 2011-08-14 04:50:34 +0000 | [diff] [blame] | 387 | return EmitLoadOfLValue(E); |
Douglas Gregor | 3f86ce1 | 2011-08-09 00:37:14 +0000 | [diff] [blame] | 388 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 389 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 390 | Value *VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) { |
| 391 | return Visit(DAE->getExpr()); |
| 392 | } |
Richard Smith | c3bf52c | 2013-04-20 22:23:05 +0000 | [diff] [blame] | 393 | Value *VisitCXXDefaultInitExpr(CXXDefaultInitExpr *DIE) { |
| 394 | CodeGenFunction::CXXDefaultInitExprScope Scope(CGF); |
| 395 | return Visit(DIE->getExpr()); |
| 396 | } |
Anders Carlsson | 5f4307b | 2009-04-14 16:58:56 +0000 | [diff] [blame] | 397 | Value *VisitCXXThisExpr(CXXThisExpr *TE) { |
| 398 | return CGF.LoadCXXThis(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 399 | } |
| 400 | |
John McCall | 4765fa0 | 2010-12-06 08:20:24 +0000 | [diff] [blame] | 401 | Value *VisitExprWithCleanups(ExprWithCleanups *E) { |
John McCall | 1a343eb | 2011-11-10 08:15:53 +0000 | [diff] [blame] | 402 | CGF.enterFullExpression(E); |
| 403 | CodeGenFunction::RunCleanupsScope Scope(CGF); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 404 | return Visit(E->getSubExpr()); |
Anders Carlsson | 7f6ad15 | 2009-05-19 04:48:36 +0000 | [diff] [blame] | 405 | } |
Anders Carlsson | a00703d | 2009-05-31 01:40:14 +0000 | [diff] [blame] | 406 | Value *VisitCXXNewExpr(const CXXNewExpr *E) { |
| 407 | return CGF.EmitCXXNewExpr(E); |
| 408 | } |
Anders Carlsson | 60e282c | 2009-08-16 21:13:42 +0000 | [diff] [blame] | 409 | Value *VisitCXXDeleteExpr(const CXXDeleteExpr *E) { |
| 410 | CGF.EmitCXXDeleteExpr(E); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 411 | return nullptr; |
Anders Carlsson | 60e282c | 2009-08-16 21:13:42 +0000 | [diff] [blame] | 412 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 413 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 414 | Value *VisitTypeTraitExpr(const TypeTraitExpr *E) { |
Francois Pichet | f187237 | 2010-12-08 22:35:30 +0000 | [diff] [blame] | 415 | return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue()); |
Francois Pichet | 6ad6f28 | 2010-12-07 00:08:36 +0000 | [diff] [blame] | 416 | } |
| 417 | |
John Wiegley | 21ff2e5 | 2011-04-28 00:16:57 +0000 | [diff] [blame] | 418 | Value *VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *E) { |
| 419 | return llvm::ConstantInt::get(Builder.getInt32Ty(), E->getValue()); |
| 420 | } |
| 421 | |
John Wiegley | 5526220 | 2011-04-25 06:54:41 +0000 | [diff] [blame] | 422 | Value *VisitExpressionTraitExpr(const ExpressionTraitExpr *E) { |
| 423 | return llvm::ConstantInt::get(Builder.getInt1Ty(), E->getValue()); |
| 424 | } |
| 425 | |
Douglas Gregor | a71d819 | 2009-09-04 17:36:40 +0000 | [diff] [blame] | 426 | Value *VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *E) { |
| 427 | // C++ [expr.pseudo]p1: |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 428 | // 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] | 429 | // operator (), and the result of such a call has type void. The only |
| 430 | // effect is the evaluation of the postfix-expression before the dot or |
| 431 | // arrow. |
| 432 | CGF.EmitScalarExpr(E->getBase()); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 433 | return nullptr; |
Douglas Gregor | a71d819 | 2009-09-04 17:36:40 +0000 | [diff] [blame] | 434 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 435 | |
Anders Carlsson | c1eb14a | 2009-09-15 04:39:46 +0000 | [diff] [blame] | 436 | Value *VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *E) { |
Anders Carlsson | a40a9f3 | 2010-05-22 17:45:10 +0000 | [diff] [blame] | 437 | return EmitNullValue(E->getType()); |
Anders Carlsson | c1eb14a | 2009-09-15 04:39:46 +0000 | [diff] [blame] | 438 | } |
Anders Carlsson | 756b5c4 | 2009-10-30 01:42:31 +0000 | [diff] [blame] | 439 | |
| 440 | Value *VisitCXXThrowExpr(const CXXThrowExpr *E) { |
| 441 | CGF.EmitCXXThrowExpr(E); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 442 | return nullptr; |
Anders Carlsson | 756b5c4 | 2009-10-30 01:42:31 +0000 | [diff] [blame] | 443 | } |
| 444 | |
Sebastian Redl | 98294de | 2010-09-10 21:04:00 +0000 | [diff] [blame] | 445 | Value *VisitCXXNoexceptExpr(const CXXNoexceptExpr *E) { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 446 | return Builder.getInt1(E->getValue()); |
Sebastian Redl | 98294de | 2010-09-10 21:04:00 +0000 | [diff] [blame] | 447 | } |
| 448 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 449 | // Binary Operators. |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 450 | Value *EmitMul(const BinOpInfo &Ops) { |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 451 | if (Ops.Ty->isSignedIntegerOrEnumerationType()) { |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 452 | switch (CGF.getLangOpts().getSignedOverflowBehavior()) { |
Chris Lattner | a4d7145 | 2010-06-26 21:25:03 +0000 | [diff] [blame] | 453 | case LangOptions::SOB_Defined: |
| 454 | return Builder.CreateMul(Ops.LHS, Ops.RHS, "mul"); |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 455 | case LangOptions::SOB_Undefined: |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 456 | if (!CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 457 | return Builder.CreateNSWMul(Ops.LHS, Ops.RHS, "mul"); |
| 458 | // Fall through. |
Chris Lattner | a4d7145 | 2010-06-26 21:25:03 +0000 | [diff] [blame] | 459 | case LangOptions::SOB_Trapping: |
| 460 | return EmitOverflowCheckedBinOp(Ops); |
| 461 | } |
| 462 | } |
Richard Smith | d6396a6 | 2012-11-05 22:21:05 +0000 | [diff] [blame] | 463 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 464 | if (Ops.Ty->isUnsignedIntegerType() && |
| 465 | CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 466 | return EmitOverflowCheckedBinOp(Ops); |
| 467 | |
Duncan Sands | f177d9d | 2010-02-15 16:14:01 +0000 | [diff] [blame] | 468 | if (Ops.LHS->getType()->isFPOrFPVectorTy()) |
Chris Lattner | 87415d2 | 2009-06-17 06:36:24 +0000 | [diff] [blame] | 469 | return Builder.CreateFMul(Ops.LHS, Ops.RHS, "mul"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 470 | return Builder.CreateMul(Ops.LHS, Ops.RHS, "mul"); |
| 471 | } |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 472 | /// Create a binary op that checks for overflow. |
| 473 | /// Currently only supports +, - and *. |
| 474 | Value *EmitOverflowCheckedBinOp(const BinOpInfo &Ops); |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 475 | |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 476 | // Check for undefined division and modulus behaviors. |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 477 | void EmitUndefinedBehaviorIntegerDivAndRemCheck(const BinOpInfo &Ops, |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 478 | llvm::Value *Zero,bool isDiv); |
David Tweed | 7a83421 | 2013-01-07 16:43:27 +0000 | [diff] [blame] | 479 | // Common helper for getting how wide LHS of shift is. |
| 480 | static Value *GetWidthMinusOneValue(Value* LHS,Value* RHS); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 481 | Value *EmitDiv(const BinOpInfo &Ops); |
| 482 | Value *EmitRem(const BinOpInfo &Ops); |
| 483 | Value *EmitAdd(const BinOpInfo &Ops); |
| 484 | Value *EmitSub(const BinOpInfo &Ops); |
| 485 | Value *EmitShl(const BinOpInfo &Ops); |
| 486 | Value *EmitShr(const BinOpInfo &Ops); |
| 487 | Value *EmitAnd(const BinOpInfo &Ops) { |
| 488 | return Builder.CreateAnd(Ops.LHS, Ops.RHS, "and"); |
| 489 | } |
| 490 | Value *EmitXor(const BinOpInfo &Ops) { |
| 491 | return Builder.CreateXor(Ops.LHS, Ops.RHS, "xor"); |
| 492 | } |
| 493 | Value *EmitOr (const BinOpInfo &Ops) { |
| 494 | return Builder.CreateOr(Ops.LHS, Ops.RHS, "or"); |
| 495 | } |
| 496 | |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 497 | BinOpInfo EmitBinOps(const BinaryOperator *E); |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 498 | LValue EmitCompoundAssignLValue(const CompoundAssignOperator *E, |
| 499 | Value *(ScalarExprEmitter::*F)(const BinOpInfo &), |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 500 | Value *&Result); |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 501 | |
Chris Lattner | 3ccf774 | 2007-08-26 21:41:21 +0000 | [diff] [blame] | 502 | Value *EmitCompoundAssign(const CompoundAssignOperator *E, |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 503 | Value *(ScalarExprEmitter::*F)(const BinOpInfo &)); |
| 504 | |
| 505 | // Binary operators and binary compound assignment operators. |
| 506 | #define HANDLEBINOP(OP) \ |
Chris Lattner | 3ccf774 | 2007-08-26 21:41:21 +0000 | [diff] [blame] | 507 | Value *VisitBin ## OP(const BinaryOperator *E) { \ |
| 508 | return Emit ## OP(EmitBinOps(E)); \ |
| 509 | } \ |
| 510 | Value *VisitBin ## OP ## Assign(const CompoundAssignOperator *E) { \ |
| 511 | return EmitCompoundAssign(E, &ScalarExprEmitter::Emit ## OP); \ |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 512 | } |
Daniel Dunbar | 7177dee | 2009-12-19 17:50:07 +0000 | [diff] [blame] | 513 | HANDLEBINOP(Mul) |
| 514 | HANDLEBINOP(Div) |
| 515 | HANDLEBINOP(Rem) |
| 516 | HANDLEBINOP(Add) |
| 517 | HANDLEBINOP(Sub) |
| 518 | HANDLEBINOP(Shl) |
| 519 | HANDLEBINOP(Shr) |
| 520 | HANDLEBINOP(And) |
| 521 | HANDLEBINOP(Xor) |
| 522 | HANDLEBINOP(Or) |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 523 | #undef HANDLEBINOP |
Daniel Dunbar | 8c6f57c | 2008-08-06 02:00:38 +0000 | [diff] [blame] | 524 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 525 | // Comparisons. |
| 526 | Value *EmitCompare(const BinaryOperator *E, unsigned UICmpOpc, |
| 527 | unsigned SICmpOpc, unsigned FCmpOpc); |
| 528 | #define VISITCOMP(CODE, UI, SI, FP) \ |
| 529 | Value *VisitBin##CODE(const BinaryOperator *E) { \ |
| 530 | return EmitCompare(E, llvm::ICmpInst::UI, llvm::ICmpInst::SI, \ |
| 531 | llvm::FCmpInst::FP); } |
Daniel Dunbar | 7177dee | 2009-12-19 17:50:07 +0000 | [diff] [blame] | 532 | VISITCOMP(LT, ICMP_ULT, ICMP_SLT, FCMP_OLT) |
| 533 | VISITCOMP(GT, ICMP_UGT, ICMP_SGT, FCMP_OGT) |
| 534 | VISITCOMP(LE, ICMP_ULE, ICMP_SLE, FCMP_OLE) |
| 535 | VISITCOMP(GE, ICMP_UGE, ICMP_SGE, FCMP_OGE) |
| 536 | VISITCOMP(EQ, ICMP_EQ , ICMP_EQ , FCMP_OEQ) |
| 537 | VISITCOMP(NE, ICMP_NE , ICMP_NE , FCMP_UNE) |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 538 | #undef VISITCOMP |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 539 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 540 | Value *VisitBinAssign (const BinaryOperator *E); |
| 541 | |
| 542 | Value *VisitBinLAnd (const BinaryOperator *E); |
| 543 | Value *VisitBinLOr (const BinaryOperator *E); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 544 | Value *VisitBinComma (const BinaryOperator *E); |
| 545 | |
Eli Friedman | 25b825d | 2009-11-18 09:41:26 +0000 | [diff] [blame] | 546 | Value *VisitBinPtrMemD(const Expr *E) { return EmitLoadOfLValue(E); } |
| 547 | Value *VisitBinPtrMemI(const Expr *E) { return EmitLoadOfLValue(E); } |
| 548 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 549 | // Other Operators. |
Mike Stump | df6b68c | 2009-02-12 18:29:15 +0000 | [diff] [blame] | 550 | Value *VisitBlockExpr(const BlockExpr *BE); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 551 | Value *VisitAbstractConditionalOperator(const AbstractConditionalOperator *); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 552 | Value *VisitChooseExpr(ChooseExpr *CE); |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 553 | Value *VisitVAArgExpr(VAArgExpr *VE); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 554 | Value *VisitObjCStringLiteral(const ObjCStringLiteral *E) { |
| 555 | return CGF.EmitObjCStringLiteral(E); |
| 556 | } |
Patrick Beard | eb382ec | 2012-04-19 00:25:12 +0000 | [diff] [blame] | 557 | Value *VisitObjCBoxedExpr(ObjCBoxedExpr *E) { |
| 558 | return CGF.EmitObjCBoxedExpr(E); |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 559 | } |
| 560 | Value *VisitObjCArrayLiteral(ObjCArrayLiteral *E) { |
| 561 | return CGF.EmitObjCArrayLiteral(E); |
| 562 | } |
| 563 | Value *VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) { |
| 564 | return CGF.EmitObjCDictionaryLiteral(E); |
| 565 | } |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 566 | Value *VisitAsTypeExpr(AsTypeExpr *CE); |
Eli Friedman | 276b061 | 2011-10-11 02:20:01 +0000 | [diff] [blame] | 567 | Value *VisitAtomicExpr(AtomicExpr *AE); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 568 | }; |
| 569 | } // end anonymous namespace. |
| 570 | |
| 571 | //===----------------------------------------------------------------------===// |
| 572 | // Utilities |
| 573 | //===----------------------------------------------------------------------===// |
| 574 | |
Chris Lattner | 9abc84e | 2007-08-26 16:42:57 +0000 | [diff] [blame] | 575 | /// EmitConversionToBool - Convert the specified expression value to a |
Chris Lattner | 3420d0d | 2007-08-26 17:25:57 +0000 | [diff] [blame] | 576 | /// boolean (i1) truth value. This is equivalent to "Val != 0". |
Chris Lattner | 9abc84e | 2007-08-26 16:42:57 +0000 | [diff] [blame] | 577 | Value *ScalarExprEmitter::EmitConversionToBool(Value *Src, QualType SrcType) { |
John McCall | 467b27b | 2009-10-22 20:10:53 +0000 | [diff] [blame] | 578 | assert(SrcType.isCanonical() && "EmitScalarConversion strips typedefs"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 579 | |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 580 | if (SrcType->isRealFloatingType()) |
| 581 | return EmitFloatToBoolConversion(Src); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 582 | |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 583 | if (const MemberPointerType *MPT = dyn_cast<MemberPointerType>(SrcType)) |
| 584 | return CGF.CGM.getCXXABI().EmitMemberPointerIsNotNull(CGF, Src, MPT); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 585 | |
Daniel Dunbar | d1d66bc | 2008-08-25 10:38:11 +0000 | [diff] [blame] | 586 | assert((SrcType->isIntegerType() || isa<llvm::PointerType>(Src->getType())) && |
Chris Lattner | 9abc84e | 2007-08-26 16:42:57 +0000 | [diff] [blame] | 587 | "Unknown scalar type to convert"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 588 | |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 589 | if (isa<llvm::IntegerType>(Src->getType())) |
| 590 | return EmitIntToBoolConversion(Src); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 591 | |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 592 | assert(isa<llvm::PointerType>(Src->getType())); |
| 593 | return EmitPointerToBoolConversion(Src); |
Chris Lattner | 9abc84e | 2007-08-26 16:42:57 +0000 | [diff] [blame] | 594 | } |
| 595 | |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 596 | void ScalarExprEmitter::EmitFloatConversionCheck(Value *OrigSrc, |
| 597 | QualType OrigSrcType, |
| 598 | Value *Src, QualType SrcType, |
| 599 | QualType DstType, |
| 600 | llvm::Type *DstTy) { |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 601 | CodeGenFunction::SanitizerScope SanScope(&CGF); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 602 | using llvm::APFloat; |
| 603 | using llvm::APSInt; |
| 604 | |
| 605 | llvm::Type *SrcTy = Src->getType(); |
| 606 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 607 | llvm::Value *Check = nullptr; |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 608 | if (llvm::IntegerType *IntTy = dyn_cast<llvm::IntegerType>(SrcTy)) { |
| 609 | // Integer to floating-point. This can fail for unsigned short -> __half |
| 610 | // or unsigned __int128 -> float. |
| 611 | assert(DstType->isFloatingType()); |
| 612 | bool SrcIsUnsigned = OrigSrcType->isUnsignedIntegerOrEnumerationType(); |
| 613 | |
| 614 | APFloat LargestFloat = |
| 615 | APFloat::getLargest(CGF.getContext().getFloatTypeSemantics(DstType)); |
| 616 | APSInt LargestInt(IntTy->getBitWidth(), SrcIsUnsigned); |
| 617 | |
| 618 | bool IsExact; |
| 619 | if (LargestFloat.convertToInteger(LargestInt, APFloat::rmTowardZero, |
| 620 | &IsExact) != APFloat::opOK) |
| 621 | // The range of representable values of this floating point type includes |
| 622 | // all values of this integer type. Don't need an overflow check. |
| 623 | return; |
| 624 | |
| 625 | llvm::Value *Max = llvm::ConstantInt::get(VMContext, LargestInt); |
| 626 | if (SrcIsUnsigned) |
| 627 | Check = Builder.CreateICmpULE(Src, Max); |
| 628 | else { |
| 629 | llvm::Value *Min = llvm::ConstantInt::get(VMContext, -LargestInt); |
| 630 | llvm::Value *GE = Builder.CreateICmpSGE(Src, Min); |
| 631 | llvm::Value *LE = Builder.CreateICmpSLE(Src, Max); |
| 632 | Check = Builder.CreateAnd(GE, LE); |
| 633 | } |
| 634 | } else { |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 635 | const llvm::fltSemantics &SrcSema = |
| 636 | CGF.getContext().getFloatTypeSemantics(OrigSrcType); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 637 | if (isa<llvm::IntegerType>(DstTy)) { |
Richard Smith | 5087645 | 2013-03-27 23:20:25 +0000 | [diff] [blame] | 638 | // Floating-point to integer. This has undefined behavior if the source is |
| 639 | // +-Inf, NaN, or doesn't fit into the destination type (after truncation |
| 640 | // to an integer). |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 641 | unsigned Width = CGF.getContext().getIntWidth(DstType); |
| 642 | bool Unsigned = DstType->isUnsignedIntegerOrEnumerationType(); |
| 643 | |
| 644 | APSInt Min = APSInt::getMinValue(Width, Unsigned); |
Richard Smith | 5087645 | 2013-03-27 23:20:25 +0000 | [diff] [blame] | 645 | APFloat MinSrc(SrcSema, APFloat::uninitialized); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 646 | if (MinSrc.convertFromAPInt(Min, !Unsigned, APFloat::rmTowardZero) & |
| 647 | APFloat::opOverflow) |
| 648 | // Don't need an overflow check for lower bound. Just check for |
| 649 | // -Inf/NaN. |
Richard Smith | aa62495 | 2013-03-19 00:01:12 +0000 | [diff] [blame] | 650 | MinSrc = APFloat::getInf(SrcSema, true); |
| 651 | else |
| 652 | // Find the largest value which is too small to represent (before |
| 653 | // truncation toward zero). |
| 654 | MinSrc.subtract(APFloat(SrcSema, 1), APFloat::rmTowardNegative); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 655 | |
| 656 | APSInt Max = APSInt::getMaxValue(Width, Unsigned); |
Richard Smith | 5087645 | 2013-03-27 23:20:25 +0000 | [diff] [blame] | 657 | APFloat MaxSrc(SrcSema, APFloat::uninitialized); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 658 | if (MaxSrc.convertFromAPInt(Max, !Unsigned, APFloat::rmTowardZero) & |
| 659 | APFloat::opOverflow) |
| 660 | // Don't need an overflow check for upper bound. Just check for |
| 661 | // +Inf/NaN. |
Richard Smith | aa62495 | 2013-03-19 00:01:12 +0000 | [diff] [blame] | 662 | MaxSrc = APFloat::getInf(SrcSema, false); |
| 663 | else |
| 664 | // Find the smallest value which is too large to represent (before |
| 665 | // truncation toward zero). |
| 666 | MaxSrc.add(APFloat(SrcSema, 1), APFloat::rmTowardPositive); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 667 | |
Richard Smith | 5087645 | 2013-03-27 23:20:25 +0000 | [diff] [blame] | 668 | // If we're converting from __half, convert the range to float to match |
| 669 | // the type of src. |
| 670 | if (OrigSrcType->isHalfType()) { |
| 671 | const llvm::fltSemantics &Sema = |
| 672 | CGF.getContext().getFloatTypeSemantics(SrcType); |
| 673 | bool IsInexact; |
| 674 | MinSrc.convert(Sema, APFloat::rmTowardZero, &IsInexact); |
| 675 | MaxSrc.convert(Sema, APFloat::rmTowardZero, &IsInexact); |
| 676 | } |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 677 | |
Richard Smith | aa62495 | 2013-03-19 00:01:12 +0000 | [diff] [blame] | 678 | llvm::Value *GE = |
| 679 | Builder.CreateFCmpOGT(Src, llvm::ConstantFP::get(VMContext, MinSrc)); |
| 680 | llvm::Value *LE = |
| 681 | Builder.CreateFCmpOLT(Src, llvm::ConstantFP::get(VMContext, MaxSrc)); |
| 682 | Check = Builder.CreateAnd(GE, LE); |
| 683 | } else { |
Richard Smith | 5087645 | 2013-03-27 23:20:25 +0000 | [diff] [blame] | 684 | // FIXME: Maybe split this sanitizer out from float-cast-overflow. |
| 685 | // |
| 686 | // Floating-point to floating-point. This has undefined behavior if the |
| 687 | // source is not in the range of representable values of the destination |
| 688 | // type. The C and C++ standards are spectacularly unclear here. We |
| 689 | // diagnose finite out-of-range conversions, but allow infinities and NaNs |
| 690 | // to convert to the corresponding value in the smaller type. |
| 691 | // |
| 692 | // C11 Annex F gives all such conversions defined behavior for IEC 60559 |
| 693 | // conforming implementations. Unfortunately, LLVM's fptrunc instruction |
| 694 | // does not. |
| 695 | |
| 696 | // Converting from a lower rank to a higher rank can never have |
| 697 | // undefined behavior, since higher-rank types must have a superset |
| 698 | // of values of lower-rank types. |
| 699 | if (CGF.getContext().getFloatingTypeOrder(OrigSrcType, DstType) != 1) |
| 700 | return; |
| 701 | |
| 702 | assert(!OrigSrcType->isHalfType() && |
| 703 | "should not check conversion from __half, it has the lowest rank"); |
| 704 | |
| 705 | const llvm::fltSemantics &DstSema = |
| 706 | CGF.getContext().getFloatTypeSemantics(DstType); |
| 707 | APFloat MinBad = APFloat::getLargest(DstSema, false); |
| 708 | APFloat MaxBad = APFloat::getInf(DstSema, false); |
| 709 | |
| 710 | bool IsInexact; |
| 711 | MinBad.convert(SrcSema, APFloat::rmTowardZero, &IsInexact); |
| 712 | MaxBad.convert(SrcSema, APFloat::rmTowardZero, &IsInexact); |
| 713 | |
| 714 | Value *AbsSrc = CGF.EmitNounwindRuntimeCall( |
| 715 | CGF.CGM.getIntrinsic(llvm::Intrinsic::fabs, Src->getType()), Src); |
Richard Smith | aa62495 | 2013-03-19 00:01:12 +0000 | [diff] [blame] | 716 | llvm::Value *GE = |
Richard Smith | 5087645 | 2013-03-27 23:20:25 +0000 | [diff] [blame] | 717 | Builder.CreateFCmpOGT(AbsSrc, llvm::ConstantFP::get(VMContext, MinBad)); |
Richard Smith | aa62495 | 2013-03-19 00:01:12 +0000 | [diff] [blame] | 718 | llvm::Value *LE = |
Richard Smith | 5087645 | 2013-03-27 23:20:25 +0000 | [diff] [blame] | 719 | Builder.CreateFCmpOLT(AbsSrc, llvm::ConstantFP::get(VMContext, MaxBad)); |
| 720 | Check = Builder.CreateNot(Builder.CreateAnd(GE, LE)); |
Richard Smith | aa62495 | 2013-03-19 00:01:12 +0000 | [diff] [blame] | 721 | } |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 722 | } |
| 723 | |
| 724 | // FIXME: Provide a SourceLocation. |
| 725 | llvm::Constant *StaticArgs[] = { |
| 726 | CGF.EmitCheckTypeDescriptor(OrigSrcType), |
| 727 | CGF.EmitCheckTypeDescriptor(DstType) |
| 728 | }; |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 729 | CGF.EmitCheck(std::make_pair(Check, SanitizerKind::FloatCastOverflow), |
| 730 | "float_cast_overflow", StaticArgs, OrigSrc); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 731 | } |
| 732 | |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 733 | /// EmitScalarConversion - Emit a conversion from the specified type to the |
| 734 | /// specified destination type, both of which are LLVM scalar types. |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 735 | Value *ScalarExprEmitter::EmitScalarConversion(Value *Src, QualType SrcType, |
| 736 | QualType DstType) { |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 737 | SrcType = CGF.getContext().getCanonicalType(SrcType); |
| 738 | DstType = CGF.getContext().getCanonicalType(DstType); |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 739 | if (SrcType == DstType) return Src; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 740 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 741 | if (DstType->isVoidType()) return nullptr; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 742 | |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 743 | llvm::Value *OrigSrc = Src; |
| 744 | QualType OrigSrcType = SrcType; |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 745 | llvm::Type *SrcTy = Src->getType(); |
| 746 | |
Joey Gouly | 19dbb20 | 2013-01-23 11:56:20 +0000 | [diff] [blame] | 747 | // If casting to/from storage-only half FP, use special intrinsics. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 748 | if (SrcType->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType && |
| 749 | !CGF.getContext().getLangOpts().HalfArgsAndReturns) { |
| 750 | Src = Builder.CreateCall( |
| 751 | CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_from_fp16, |
| 752 | CGF.CGM.FloatTy), |
| 753 | Src); |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 754 | SrcType = CGF.getContext().FloatTy; |
Chris Lattner | 8b41868 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 755 | SrcTy = CGF.FloatTy; |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 756 | } |
| 757 | |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 758 | // Handle conversions to bool first, they are special: comparisons against 0. |
Chris Lattner | ed70f0a | 2007-08-26 16:52:28 +0000 | [diff] [blame] | 759 | if (DstType->isBooleanType()) |
| 760 | return EmitConversionToBool(Src, SrcType); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 761 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 762 | llvm::Type *DstTy = ConvertType(DstType); |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 763 | |
| 764 | // Ignore conversions like int -> uint. |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 765 | if (SrcTy == DstTy) |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 766 | return Src; |
| 767 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 768 | // Handle pointer conversions next: pointers can only be converted to/from |
| 769 | // other pointers and integers. Check for pointer types in terms of LLVM, as |
| 770 | // 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] | 771 | if (isa<llvm::PointerType>(DstTy)) { |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 772 | // The source value may be an integer, or a pointer. |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 773 | if (isa<llvm::PointerType>(SrcTy)) |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 774 | return Builder.CreateBitCast(Src, DstTy, "conv"); |
Anders Carlsson | 191dfe9 | 2009-09-12 04:57:16 +0000 | [diff] [blame] | 775 | |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 776 | assert(SrcType->isIntegerType() && "Not ptr->ptr or int->ptr conversion?"); |
Eli Friedman | 2561542 | 2009-03-04 04:02:35 +0000 | [diff] [blame] | 777 | // First, convert to the correct width so that we control the kind of |
| 778 | // extension. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 779 | llvm::Type *MiddleTy = CGF.IntPtrTy; |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 780 | bool InputSigned = SrcType->isSignedIntegerOrEnumerationType(); |
Eli Friedman | 2561542 | 2009-03-04 04:02:35 +0000 | [diff] [blame] | 781 | llvm::Value* IntResult = |
| 782 | Builder.CreateIntCast(Src, MiddleTy, InputSigned, "conv"); |
| 783 | // Then, cast to pointer. |
| 784 | return Builder.CreateIntToPtr(IntResult, DstTy, "conv"); |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 785 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 786 | |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 787 | if (isa<llvm::PointerType>(SrcTy)) { |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 788 | // Must be an ptr to int cast. |
| 789 | assert(isa<llvm::IntegerType>(DstTy) && "not ptr->int?"); |
Anders Carlsson | 50b5a30 | 2007-10-31 23:18:02 +0000 | [diff] [blame] | 790 | return Builder.CreatePtrToInt(Src, DstTy, "conv"); |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 791 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 792 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 793 | // 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] | 794 | if (DstType->isExtVectorType() && !SrcType->isVectorType()) { |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 795 | // Cast the scalar to element type |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 796 | QualType EltTy = DstType->getAs<ExtVectorType>()->getElementType(); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 797 | llvm::Value *Elt = EmitScalarConversion(Src, SrcType, EltTy); |
| 798 | |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 799 | // Splat the element across to all elements |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 800 | unsigned NumElements = cast<llvm::VectorType>(DstTy)->getNumElements(); |
Benjamin Kramer | 0b22708 | 2013-01-01 20:08:10 +0000 | [diff] [blame] | 801 | return Builder.CreateVectorSplat(NumElements, Elt, "splat"); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 802 | } |
Nate Begeman | 4119d1a | 2007-12-30 02:59:45 +0000 | [diff] [blame] | 803 | |
Chris Lattner | 3b1ae00 | 2008-02-02 04:51:41 +0000 | [diff] [blame] | 804 | // Allow bitcast from vector to integer/fp of the same size. |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 805 | if (isa<llvm::VectorType>(SrcTy) || |
Chris Lattner | 3b1ae00 | 2008-02-02 04:51:41 +0000 | [diff] [blame] | 806 | isa<llvm::VectorType>(DstTy)) |
Anders Carlsson | 7019a9e | 2007-12-05 07:36:10 +0000 | [diff] [blame] | 807 | return Builder.CreateBitCast(Src, DstTy, "conv"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 808 | |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 809 | // Finally, we have the arithmetic types: real int/float. |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 810 | Value *Res = nullptr; |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 811 | llvm::Type *ResTy = DstTy; |
| 812 | |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 813 | // An overflowing conversion has undefined behavior if either the source type |
| 814 | // or the destination type is a floating-point type. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 815 | if (CGF.SanOpts.has(SanitizerKind::FloatCastOverflow) && |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 816 | (OrigSrcType->isFloatingType() || DstType->isFloatingType())) |
Will Dietz | 4f45bc0 | 2013-01-18 11:30:38 +0000 | [diff] [blame] | 817 | EmitFloatConversionCheck(OrigSrc, OrigSrcType, Src, SrcType, DstType, |
| 818 | DstTy); |
Richard Smith | b2aa66c | 2012-10-12 22:57:06 +0000 | [diff] [blame] | 819 | |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 820 | // Cast to half via float |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 821 | if (DstType->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType && |
| 822 | !CGF.getContext().getLangOpts().HalfArgsAndReturns) |
Chris Lattner | 8b41868 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 823 | DstTy = CGF.FloatTy; |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 824 | |
| 825 | if (isa<llvm::IntegerType>(SrcTy)) { |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 826 | bool InputSigned = SrcType->isSignedIntegerOrEnumerationType(); |
Anders Carlsson | b5ce097 | 2007-12-26 18:20:19 +0000 | [diff] [blame] | 827 | if (isa<llvm::IntegerType>(DstTy)) |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 828 | Res = Builder.CreateIntCast(Src, DstTy, InputSigned, "conv"); |
Anders Carlsson | b5ce097 | 2007-12-26 18:20:19 +0000 | [diff] [blame] | 829 | else if (InputSigned) |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 830 | Res = Builder.CreateSIToFP(Src, DstTy, "conv"); |
Anders Carlsson | b5ce097 | 2007-12-26 18:20:19 +0000 | [diff] [blame] | 831 | else |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 832 | Res = Builder.CreateUIToFP(Src, DstTy, "conv"); |
| 833 | } else if (isa<llvm::IntegerType>(DstTy)) { |
| 834 | assert(SrcTy->isFloatingPointTy() && "Unknown real conversion"); |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 835 | if (DstType->isSignedIntegerOrEnumerationType()) |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 836 | Res = Builder.CreateFPToSI(Src, DstTy, "conv"); |
Anders Carlsson | b5ce097 | 2007-12-26 18:20:19 +0000 | [diff] [blame] | 837 | else |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 838 | Res = Builder.CreateFPToUI(Src, DstTy, "conv"); |
| 839 | } else { |
| 840 | assert(SrcTy->isFloatingPointTy() && DstTy->isFloatingPointTy() && |
| 841 | "Unknown real conversion"); |
| 842 | if (DstTy->getTypeID() < SrcTy->getTypeID()) |
| 843 | Res = Builder.CreateFPTrunc(Src, DstTy, "conv"); |
| 844 | else |
| 845 | Res = Builder.CreateFPExt(Src, DstTy, "conv"); |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 846 | } |
| 847 | |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 848 | if (DstTy != ResTy) { |
| 849 | assert(ResTy->isIntegerTy(16) && "Only half FP requires extra conversion"); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 850 | Res = Builder.CreateCall( |
| 851 | CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_to_fp16, CGF.CGM.FloatTy), |
| 852 | Res); |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 853 | } |
| 854 | |
| 855 | return Res; |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 856 | } |
| 857 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 858 | /// EmitComplexToScalarConversion - Emit a conversion from the specified complex |
| 859 | /// type to the specified destination type, where the destination type is an |
| 860 | /// LLVM scalar type. |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 861 | Value *ScalarExprEmitter:: |
| 862 | EmitComplexToScalarConversion(CodeGenFunction::ComplexPairTy Src, |
| 863 | QualType SrcTy, QualType DstTy) { |
Chris Lattner | ed70f0a | 2007-08-26 16:52:28 +0000 | [diff] [blame] | 864 | // Get the source element type. |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 865 | SrcTy = SrcTy->castAs<ComplexType>()->getElementType(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 866 | |
Chris Lattner | ed70f0a | 2007-08-26 16:52:28 +0000 | [diff] [blame] | 867 | // Handle conversions to bool first, they are special: comparisons against 0. |
| 868 | if (DstTy->isBooleanType()) { |
| 869 | // Complex != 0 -> (Real != 0) | (Imag != 0) |
| 870 | Src.first = EmitScalarConversion(Src.first, SrcTy, DstTy); |
| 871 | Src.second = EmitScalarConversion(Src.second, SrcTy, DstTy); |
| 872 | return Builder.CreateOr(Src.first, Src.second, "tobool"); |
| 873 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 874 | |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 875 | // C99 6.3.1.7p2: "When a value of complex type is converted to a real type, |
| 876 | // the imaginary part of the complex value is discarded and the value of the |
| 877 | // real part is converted according to the conversion rules for the |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 878 | // corresponding real type. |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 879 | return EmitScalarConversion(Src.first, SrcTy, DstTy); |
| 880 | } |
| 881 | |
Anders Carlsson | a40a9f3 | 2010-05-22 17:45:10 +0000 | [diff] [blame] | 882 | Value *ScalarExprEmitter::EmitNullValue(QualType Ty) { |
Richard Smith | 0dbe2fb | 2012-12-21 03:17:28 +0000 | [diff] [blame] | 883 | return CGF.EmitFromMemory(CGF.CGM.EmitNullConstant(Ty), Ty); |
Anders Carlsson | a40a9f3 | 2010-05-22 17:45:10 +0000 | [diff] [blame] | 884 | } |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 885 | |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 886 | /// \brief Emit a sanitization check for the given "binary" operation (which |
| 887 | /// 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] | 888 | /// operation). The check passes if all values in \p Checks (which are \c i1), |
| 889 | /// are \c true. |
| 890 | void ScalarExprEmitter::EmitBinOpCheck( |
| 891 | ArrayRef<std::pair<Value *, SanitizerKind>> Checks, const BinOpInfo &Info) { |
| 892 | assert(CGF.IsSanitizerScope); |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 893 | StringRef CheckName; |
Dmitri Gribenko | cfa88f8 | 2013-01-12 19:30:44 +0000 | [diff] [blame] | 894 | SmallVector<llvm::Constant *, 4> StaticData; |
| 895 | SmallVector<llvm::Value *, 2> DynamicData; |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 896 | |
| 897 | BinaryOperatorKind Opcode = Info.Opcode; |
| 898 | if (BinaryOperator::isCompoundAssignmentOp(Opcode)) |
| 899 | Opcode = BinaryOperator::getOpForCompoundAssignment(Opcode); |
| 900 | |
| 901 | StaticData.push_back(CGF.EmitCheckSourceLocation(Info.E->getExprLoc())); |
| 902 | const UnaryOperator *UO = dyn_cast<UnaryOperator>(Info.E); |
| 903 | if (UO && UO->getOpcode() == UO_Minus) { |
| 904 | CheckName = "negate_overflow"; |
| 905 | StaticData.push_back(CGF.EmitCheckTypeDescriptor(UO->getType())); |
| 906 | DynamicData.push_back(Info.RHS); |
| 907 | } else { |
| 908 | if (BinaryOperator::isShiftOp(Opcode)) { |
| 909 | // Shift LHS negative or too large, or RHS out of bounds. |
| 910 | CheckName = "shift_out_of_bounds"; |
| 911 | const BinaryOperator *BO = cast<BinaryOperator>(Info.E); |
| 912 | StaticData.push_back( |
| 913 | CGF.EmitCheckTypeDescriptor(BO->getLHS()->getType())); |
| 914 | StaticData.push_back( |
| 915 | CGF.EmitCheckTypeDescriptor(BO->getRHS()->getType())); |
| 916 | } else if (Opcode == BO_Div || Opcode == BO_Rem) { |
| 917 | // Divide or modulo by zero, or signed overflow (eg INT_MAX / -1). |
| 918 | CheckName = "divrem_overflow"; |
Will Dietz | 822023a | 2013-01-07 22:25:52 +0000 | [diff] [blame] | 919 | StaticData.push_back(CGF.EmitCheckTypeDescriptor(Info.Ty)); |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 920 | } else { |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 921 | // Arithmetic overflow (+, -, *). |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 922 | switch (Opcode) { |
| 923 | case BO_Add: CheckName = "add_overflow"; break; |
| 924 | case BO_Sub: CheckName = "sub_overflow"; break; |
| 925 | case BO_Mul: CheckName = "mul_overflow"; break; |
| 926 | default: llvm_unreachable("unexpected opcode for bin op check"); |
| 927 | } |
Will Dietz | 822023a | 2013-01-07 22:25:52 +0000 | [diff] [blame] | 928 | StaticData.push_back(CGF.EmitCheckTypeDescriptor(Info.Ty)); |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 929 | } |
| 930 | DynamicData.push_back(Info.LHS); |
| 931 | DynamicData.push_back(Info.RHS); |
| 932 | } |
| 933 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 934 | CGF.EmitCheck(Checks, CheckName, StaticData, DynamicData); |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 935 | } |
| 936 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 937 | //===----------------------------------------------------------------------===// |
| 938 | // Visitor Methods |
| 939 | //===----------------------------------------------------------------------===// |
| 940 | |
| 941 | Value *ScalarExprEmitter::VisitExpr(Expr *E) { |
Daniel Dunbar | 488e993 | 2008-08-16 00:56:44 +0000 | [diff] [blame] | 942 | CGF.ErrorUnsupported(E, "scalar expression"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 943 | if (E->getType()->isVoidType()) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 944 | return nullptr; |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 945 | return llvm::UndefValue::get(CGF.ConvertType(E->getType())); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 946 | } |
| 947 | |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 948 | Value *ScalarExprEmitter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) { |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 949 | // Vector Mask Case |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 950 | if (E->getNumSubExprs() == 2 || |
Rafael Espindola | 3f4cb12 | 2010-06-09 02:17:08 +0000 | [diff] [blame] | 951 | (E->getNumSubExprs() == 3 && E->getExpr(2)->getType()->isVectorType())) { |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 952 | Value *LHS = CGF.EmitScalarExpr(E->getExpr(0)); |
| 953 | Value *RHS = CGF.EmitScalarExpr(E->getExpr(1)); |
| 954 | Value *Mask; |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 955 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 956 | llvm::VectorType *LTy = cast<llvm::VectorType>(LHS->getType()); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 957 | unsigned LHSElts = LTy->getNumElements(); |
| 958 | |
| 959 | if (E->getNumSubExprs() == 3) { |
| 960 | Mask = CGF.EmitScalarExpr(E->getExpr(2)); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 961 | |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 962 | // Shuffle LHS & RHS into one input vector. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 963 | SmallVector<llvm::Constant*, 32> concat; |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 964 | for (unsigned i = 0; i != LHSElts; ++i) { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 965 | concat.push_back(Builder.getInt32(2*i)); |
| 966 | concat.push_back(Builder.getInt32(2*i+1)); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 967 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 968 | |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 969 | Value* CV = llvm::ConstantVector::get(concat); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 970 | LHS = Builder.CreateShuffleVector(LHS, RHS, CV, "concat"); |
| 971 | LHSElts *= 2; |
| 972 | } else { |
| 973 | Mask = RHS; |
| 974 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 975 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 976 | llvm::VectorType *MTy = cast<llvm::VectorType>(Mask->getType()); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 977 | llvm::Constant* EltMask; |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 978 | |
Craig Topper | 2f66512 | 2013-08-01 06:42:40 +0000 | [diff] [blame] | 979 | EltMask = llvm::ConstantInt::get(MTy->getElementType(), |
| 980 | llvm::NextPowerOf2(LHSElts-1)-1); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 981 | |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 982 | // Mask off the high bits of each shuffle index. |
Chris Lattner | 2ce8842 | 2012-01-25 05:34:41 +0000 | [diff] [blame] | 983 | Value *MaskBits = llvm::ConstantVector::getSplat(MTy->getNumElements(), |
| 984 | EltMask); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 985 | Mask = Builder.CreateAnd(Mask, MaskBits, "mask"); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 986 | |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 987 | // newv = undef |
| 988 | // mask = mask & maskbits |
| 989 | // for each elt |
| 990 | // n = extract mask i |
| 991 | // x = extract val n |
| 992 | // newv = insert newv, x, i |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 993 | llvm::VectorType *RTy = llvm::VectorType::get(LTy->getElementType(), |
Craig Topper | 34d55e1 | 2013-07-27 05:00:42 +0000 | [diff] [blame] | 994 | MTy->getNumElements()); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 995 | Value* NewV = llvm::UndefValue::get(RTy); |
| 996 | for (unsigned i = 0, e = MTy->getNumElements(); i != e; ++i) { |
Stephen Hines | c568f1e | 2014-07-21 00:47:37 -0700 | [diff] [blame] | 997 | Value *IIndx = llvm::ConstantInt::get(CGF.SizeTy, i); |
Eli Friedman | 87b9c03 | 2012-04-05 21:48:40 +0000 | [diff] [blame] | 998 | Value *Indx = Builder.CreateExtractElement(Mask, IIndx, "shuf_idx"); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 999 | |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 1000 | Value *VExt = Builder.CreateExtractElement(LHS, Indx, "shuf_elt"); |
Eli Friedman | 87b9c03 | 2012-04-05 21:48:40 +0000 | [diff] [blame] | 1001 | NewV = Builder.CreateInsertElement(NewV, VExt, IIndx, "shuf_ins"); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 1002 | } |
| 1003 | return NewV; |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 1004 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1005 | |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 1006 | Value* V1 = CGF.EmitScalarExpr(E->getExpr(0)); |
| 1007 | Value* V2 = CGF.EmitScalarExpr(E->getExpr(1)); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1008 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1009 | SmallVector<llvm::Constant*, 32> indices; |
Craig Topper | 72c422c | 2013-08-01 04:51:48 +0000 | [diff] [blame] | 1010 | for (unsigned i = 2; i < E->getNumSubExprs(); ++i) { |
Craig Topper | 6f4f808 | 2013-08-03 17:40:38 +0000 | [diff] [blame] | 1011 | llvm::APSInt Idx = E->getShuffleMaskIdx(CGF.getContext(), i-2); |
| 1012 | // Check for -1 and output it as undef in the IR. |
| 1013 | if (Idx.isSigned() && Idx.isAllOnesValue()) |
| 1014 | indices.push_back(llvm::UndefValue::get(CGF.Int32Ty)); |
| 1015 | else |
| 1016 | indices.push_back(Builder.getInt32(Idx.getZExtValue())); |
Nate Begeman | 37b6a57 | 2010-06-08 00:16:34 +0000 | [diff] [blame] | 1017 | } |
| 1018 | |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1019 | Value *SV = llvm::ConstantVector::get(indices); |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 1020 | return Builder.CreateShuffleVector(V1, V2, SV, "shuffle"); |
| 1021 | } |
Hal Finkel | 414a1bd | 2013-09-18 03:29:45 +0000 | [diff] [blame] | 1022 | |
| 1023 | Value *ScalarExprEmitter::VisitConvertVectorExpr(ConvertVectorExpr *E) { |
| 1024 | QualType SrcType = E->getSrcExpr()->getType(), |
| 1025 | DstType = E->getType(); |
| 1026 | |
| 1027 | Value *Src = CGF.EmitScalarExpr(E->getSrcExpr()); |
| 1028 | |
| 1029 | SrcType = CGF.getContext().getCanonicalType(SrcType); |
| 1030 | DstType = CGF.getContext().getCanonicalType(DstType); |
| 1031 | if (SrcType == DstType) return Src; |
| 1032 | |
| 1033 | assert(SrcType->isVectorType() && |
| 1034 | "ConvertVector source type must be a vector"); |
| 1035 | assert(DstType->isVectorType() && |
| 1036 | "ConvertVector destination type must be a vector"); |
| 1037 | |
| 1038 | llvm::Type *SrcTy = Src->getType(); |
| 1039 | llvm::Type *DstTy = ConvertType(DstType); |
| 1040 | |
| 1041 | // Ignore conversions like int -> uint. |
| 1042 | if (SrcTy == DstTy) |
| 1043 | return Src; |
| 1044 | |
| 1045 | QualType SrcEltType = SrcType->getAs<VectorType>()->getElementType(), |
| 1046 | DstEltType = DstType->getAs<VectorType>()->getElementType(); |
| 1047 | |
| 1048 | assert(SrcTy->isVectorTy() && |
| 1049 | "ConvertVector source IR type must be a vector"); |
| 1050 | assert(DstTy->isVectorTy() && |
| 1051 | "ConvertVector destination IR type must be a vector"); |
| 1052 | |
| 1053 | llvm::Type *SrcEltTy = SrcTy->getVectorElementType(), |
| 1054 | *DstEltTy = DstTy->getVectorElementType(); |
| 1055 | |
| 1056 | if (DstEltType->isBooleanType()) { |
| 1057 | assert((SrcEltTy->isFloatingPointTy() || |
| 1058 | isa<llvm::IntegerType>(SrcEltTy)) && "Unknown boolean conversion"); |
| 1059 | |
| 1060 | llvm::Value *Zero = llvm::Constant::getNullValue(SrcTy); |
| 1061 | if (SrcEltTy->isFloatingPointTy()) { |
| 1062 | return Builder.CreateFCmpUNE(Src, Zero, "tobool"); |
| 1063 | } else { |
| 1064 | return Builder.CreateICmpNE(Src, Zero, "tobool"); |
| 1065 | } |
| 1066 | } |
| 1067 | |
| 1068 | // We have the arithmetic types: real int/float. |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1069 | Value *Res = nullptr; |
Hal Finkel | 414a1bd | 2013-09-18 03:29:45 +0000 | [diff] [blame] | 1070 | |
| 1071 | if (isa<llvm::IntegerType>(SrcEltTy)) { |
| 1072 | bool InputSigned = SrcEltType->isSignedIntegerOrEnumerationType(); |
| 1073 | if (isa<llvm::IntegerType>(DstEltTy)) |
| 1074 | Res = Builder.CreateIntCast(Src, DstTy, InputSigned, "conv"); |
| 1075 | else if (InputSigned) |
| 1076 | Res = Builder.CreateSIToFP(Src, DstTy, "conv"); |
| 1077 | else |
| 1078 | Res = Builder.CreateUIToFP(Src, DstTy, "conv"); |
| 1079 | } else if (isa<llvm::IntegerType>(DstEltTy)) { |
| 1080 | assert(SrcEltTy->isFloatingPointTy() && "Unknown real conversion"); |
| 1081 | if (DstEltType->isSignedIntegerOrEnumerationType()) |
| 1082 | Res = Builder.CreateFPToSI(Src, DstTy, "conv"); |
| 1083 | else |
| 1084 | Res = Builder.CreateFPToUI(Src, DstTy, "conv"); |
| 1085 | } else { |
| 1086 | assert(SrcEltTy->isFloatingPointTy() && DstEltTy->isFloatingPointTy() && |
| 1087 | "Unknown real conversion"); |
| 1088 | if (DstEltTy->getTypeID() < SrcEltTy->getTypeID()) |
| 1089 | Res = Builder.CreateFPTrunc(Src, DstTy, "conv"); |
| 1090 | else |
| 1091 | Res = Builder.CreateFPExt(Src, DstTy, "conv"); |
| 1092 | } |
| 1093 | |
| 1094 | return Res; |
| 1095 | } |
| 1096 | |
Eli Friedman | 2866527 | 2009-11-26 03:22:21 +0000 | [diff] [blame] | 1097 | Value *ScalarExprEmitter::VisitMemberExpr(MemberExpr *E) { |
Richard Smith | 80d4b55 | 2011-12-28 19:48:30 +0000 | [diff] [blame] | 1098 | llvm::APSInt Value; |
| 1099 | if (E->EvaluateAsInt(Value, CGF.getContext(), Expr::SE_AllowSideEffects)) { |
Eli Friedman | 2866527 | 2009-11-26 03:22:21 +0000 | [diff] [blame] | 1100 | if (E->isArrow()) |
| 1101 | CGF.EmitScalarExpr(E->getBase()); |
| 1102 | else |
| 1103 | EmitLValue(E->getBase()); |
Richard Smith | 80d4b55 | 2011-12-28 19:48:30 +0000 | [diff] [blame] | 1104 | return Builder.getInt(Value); |
Eli Friedman | 2866527 | 2009-11-26 03:22:21 +0000 | [diff] [blame] | 1105 | } |
Devang Patel | 78ba3d4 | 2010-10-04 21:46:04 +0000 | [diff] [blame] | 1106 | |
Eli Friedman | 2866527 | 2009-11-26 03:22:21 +0000 | [diff] [blame] | 1107 | return EmitLoadOfLValue(E); |
| 1108 | } |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 1109 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1110 | Value *ScalarExprEmitter::VisitArraySubscriptExpr(ArraySubscriptExpr *E) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 1111 | TestAndClearIgnoreResultAssign(); |
| 1112 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1113 | // Emit subscript expressions in rvalue context's. For most cases, this just |
| 1114 | // loads the lvalue formed by the subscript expr. However, we have to be |
| 1115 | // careful, because the base of a vector subscript is occasionally an rvalue, |
| 1116 | // so we can't get it as an lvalue. |
| 1117 | if (!E->getBase()->getType()->isVectorType()) |
| 1118 | return EmitLoadOfLValue(E); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1119 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1120 | // Handle the vector case. The base must be a vector, the index must be an |
| 1121 | // integer value. |
| 1122 | Value *Base = Visit(E->getBase()); |
| 1123 | Value *Idx = Visit(E->getIdx()); |
Richard Smith | a0a628f | 2013-02-23 02:53:19 +0000 | [diff] [blame] | 1124 | QualType IdxTy = E->getIdx()->getType(); |
| 1125 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1126 | if (CGF.SanOpts.has(SanitizerKind::ArrayBounds)) |
Richard Smith | a0a628f | 2013-02-23 02:53:19 +0000 | [diff] [blame] | 1127 | CGF.EmitBoundsCheck(E, E->getBase(), Idx, IdxTy, /*Accessed*/true); |
| 1128 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1129 | return Builder.CreateExtractElement(Base, Idx, "vecext"); |
| 1130 | } |
| 1131 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1132 | static llvm::Constant *getMaskElt(llvm::ShuffleVectorInst *SVI, unsigned Idx, |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1133 | unsigned Off, llvm::Type *I32Ty) { |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1134 | int MV = SVI->getMaskValue(Idx); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1135 | if (MV == -1) |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1136 | return llvm::UndefValue::get(I32Ty); |
| 1137 | return llvm::ConstantInt::get(I32Ty, Off+MV); |
| 1138 | } |
| 1139 | |
| 1140 | Value *ScalarExprEmitter::VisitInitListExpr(InitListExpr *E) { |
| 1141 | bool Ignore = TestAndClearIgnoreResultAssign(); |
| 1142 | (void)Ignore; |
| 1143 | assert (Ignore == false && "init list ignored"); |
| 1144 | unsigned NumInitElements = E->getNumInits(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1145 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1146 | if (E->hadArrayRangeDesignator()) |
| 1147 | CGF.ErrorUnsupported(E, "GNU array range designator extension"); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1148 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1149 | llvm::VectorType *VType = |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1150 | dyn_cast<llvm::VectorType>(ConvertType(E->getType())); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1151 | |
Sebastian Redl | cea8d96 | 2011-09-24 17:48:14 +0000 | [diff] [blame] | 1152 | if (!VType) { |
| 1153 | if (NumInitElements == 0) { |
| 1154 | // C++11 value-initialization for the scalar. |
| 1155 | return EmitNullValue(E->getType()); |
| 1156 | } |
| 1157 | // We have a scalar in braces. Just use the first element. |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1158 | return Visit(E->getInit(0)); |
Sebastian Redl | cea8d96 | 2011-09-24 17:48:14 +0000 | [diff] [blame] | 1159 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1160 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1161 | unsigned ResElts = VType->getNumElements(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1162 | |
| 1163 | // Loop over initializers collecting the Value for each, and remembering |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1164 | // whether the source was swizzle (ExtVectorElementExpr). This will allow |
| 1165 | // us to fold the shuffle for the swizzle into the shuffle for the vector |
| 1166 | // initializer, since LLVM optimizers generally do not want to touch |
| 1167 | // shuffles. |
| 1168 | unsigned CurIdx = 0; |
| 1169 | bool VIsUndefShuffle = false; |
| 1170 | llvm::Value *V = llvm::UndefValue::get(VType); |
| 1171 | for (unsigned i = 0; i != NumInitElements; ++i) { |
| 1172 | Expr *IE = E->getInit(i); |
| 1173 | Value *Init = Visit(IE); |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1174 | SmallVector<llvm::Constant*, 16> Args; |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1175 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1176 | llvm::VectorType *VVT = dyn_cast<llvm::VectorType>(Init->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1177 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1178 | // Handle scalar elements. If the scalar initializer is actually one |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1179 | // 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] | 1180 | // extract+insert. |
| 1181 | if (!VVT) { |
| 1182 | if (isa<ExtVectorElementExpr>(IE)) { |
| 1183 | llvm::ExtractElementInst *EI = cast<llvm::ExtractElementInst>(Init); |
| 1184 | |
| 1185 | if (EI->getVectorOperandType()->getNumElements() == ResElts) { |
| 1186 | llvm::ConstantInt *C = cast<llvm::ConstantInt>(EI->getIndexOperand()); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1187 | Value *LHS = nullptr, *RHS = nullptr; |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1188 | if (CurIdx == 0) { |
| 1189 | // insert into undef -> shuffle (src, undef) |
| 1190 | Args.push_back(C); |
Benjamin Kramer | 14c5982 | 2012-02-14 12:06:21 +0000 | [diff] [blame] | 1191 | Args.resize(ResElts, llvm::UndefValue::get(CGF.Int32Ty)); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1192 | |
| 1193 | LHS = EI->getVectorOperand(); |
| 1194 | RHS = V; |
| 1195 | VIsUndefShuffle = true; |
| 1196 | } else if (VIsUndefShuffle) { |
| 1197 | // insert into undefshuffle && size match -> shuffle (v, src) |
| 1198 | llvm::ShuffleVectorInst *SVV = cast<llvm::ShuffleVectorInst>(V); |
| 1199 | for (unsigned j = 0; j != CurIdx; ++j) |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 1200 | Args.push_back(getMaskElt(SVV, j, 0, CGF.Int32Ty)); |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1201 | Args.push_back(Builder.getInt32(ResElts + C->getZExtValue())); |
Benjamin Kramer | 14c5982 | 2012-02-14 12:06:21 +0000 | [diff] [blame] | 1202 | Args.resize(ResElts, llvm::UndefValue::get(CGF.Int32Ty)); |
| 1203 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1204 | LHS = cast<llvm::ShuffleVectorInst>(V)->getOperand(0); |
| 1205 | RHS = EI->getVectorOperand(); |
| 1206 | VIsUndefShuffle = false; |
| 1207 | } |
| 1208 | if (!Args.empty()) { |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1209 | llvm::Constant *Mask = llvm::ConstantVector::get(Args); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1210 | V = Builder.CreateShuffleVector(LHS, RHS, Mask); |
| 1211 | ++CurIdx; |
| 1212 | continue; |
| 1213 | } |
| 1214 | } |
| 1215 | } |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1216 | V = Builder.CreateInsertElement(V, Init, Builder.getInt32(CurIdx), |
| 1217 | "vecinit"); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1218 | VIsUndefShuffle = false; |
| 1219 | ++CurIdx; |
| 1220 | continue; |
| 1221 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1222 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1223 | unsigned InitElts = VVT->getNumElements(); |
| 1224 | |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1225 | // If the initializer is an ExtVecEltExpr (a swizzle), and the swizzle's |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1226 | // input is the same width as the vector being constructed, generate an |
| 1227 | // optimized shuffle of the swizzle input into the result. |
Nate Begeman | a99f083 | 2009-10-25 02:26:01 +0000 | [diff] [blame] | 1228 | unsigned Offset = (CurIdx == 0) ? 0 : ResElts; |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1229 | if (isa<ExtVectorElementExpr>(IE)) { |
| 1230 | llvm::ShuffleVectorInst *SVI = cast<llvm::ShuffleVectorInst>(Init); |
| 1231 | Value *SVOp = SVI->getOperand(0); |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1232 | llvm::VectorType *OpTy = cast<llvm::VectorType>(SVOp->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1233 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1234 | if (OpTy->getNumElements() == ResElts) { |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1235 | for (unsigned j = 0; j != CurIdx; ++j) { |
| 1236 | // If the current vector initializer is a shuffle with undef, merge |
| 1237 | // this shuffle directly into it. |
| 1238 | if (VIsUndefShuffle) { |
| 1239 | Args.push_back(getMaskElt(cast<llvm::ShuffleVectorInst>(V), j, 0, |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 1240 | CGF.Int32Ty)); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1241 | } else { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1242 | Args.push_back(Builder.getInt32(j)); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1243 | } |
| 1244 | } |
| 1245 | for (unsigned j = 0, je = InitElts; j != je; ++j) |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 1246 | Args.push_back(getMaskElt(SVI, j, Offset, CGF.Int32Ty)); |
Benjamin Kramer | 14c5982 | 2012-02-14 12:06:21 +0000 | [diff] [blame] | 1247 | Args.resize(ResElts, llvm::UndefValue::get(CGF.Int32Ty)); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1248 | |
| 1249 | if (VIsUndefShuffle) |
| 1250 | V = cast<llvm::ShuffleVectorInst>(V)->getOperand(0); |
| 1251 | |
| 1252 | Init = SVOp; |
| 1253 | } |
| 1254 | } |
| 1255 | |
| 1256 | // Extend init to result vector length, and then shuffle its contribution |
| 1257 | // to the vector initializer into V. |
| 1258 | if (Args.empty()) { |
| 1259 | for (unsigned j = 0; j != InitElts; ++j) |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1260 | Args.push_back(Builder.getInt32(j)); |
Benjamin Kramer | 14c5982 | 2012-02-14 12:06:21 +0000 | [diff] [blame] | 1261 | Args.resize(ResElts, llvm::UndefValue::get(CGF.Int32Ty)); |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1262 | llvm::Constant *Mask = llvm::ConstantVector::get(Args); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1263 | Init = Builder.CreateShuffleVector(Init, llvm::UndefValue::get(VVT), |
Nate Begeman | a99f083 | 2009-10-25 02:26:01 +0000 | [diff] [blame] | 1264 | Mask, "vext"); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1265 | |
| 1266 | Args.clear(); |
| 1267 | for (unsigned j = 0; j != CurIdx; ++j) |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1268 | Args.push_back(Builder.getInt32(j)); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1269 | for (unsigned j = 0; j != InitElts; ++j) |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1270 | Args.push_back(Builder.getInt32(j+Offset)); |
Benjamin Kramer | 14c5982 | 2012-02-14 12:06:21 +0000 | [diff] [blame] | 1271 | Args.resize(ResElts, llvm::UndefValue::get(CGF.Int32Ty)); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1272 | } |
| 1273 | |
| 1274 | // If V is undef, make sure it ends up on the RHS of the shuffle to aid |
| 1275 | // merging subsequent shuffles into this one. |
| 1276 | if (CurIdx == 0) |
| 1277 | std::swap(V, Init); |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1278 | llvm::Constant *Mask = llvm::ConstantVector::get(Args); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1279 | V = Builder.CreateShuffleVector(V, Init, Mask, "vecinit"); |
| 1280 | VIsUndefShuffle = isa<llvm::UndefValue>(Init); |
| 1281 | CurIdx += InitElts; |
| 1282 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1283 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1284 | // FIXME: evaluate codegen vs. shuffling against constant null vector. |
| 1285 | // Emit remaining default initializers. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1286 | llvm::Type *EltTy = VType->getElementType(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1287 | |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1288 | // Emit remaining default initializers |
| 1289 | for (/* Do not initialize i*/; CurIdx < ResElts; ++CurIdx) { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1290 | Value *Idx = Builder.getInt32(CurIdx); |
Nate Begeman | 0533b30 | 2009-10-18 20:10:40 +0000 | [diff] [blame] | 1291 | llvm::Value *Init = llvm::Constant::getNullValue(EltTy); |
| 1292 | V = Builder.CreateInsertElement(V, Init, Idx, "vecinit"); |
| 1293 | } |
| 1294 | return V; |
| 1295 | } |
| 1296 | |
Anders Carlsson | a3697c9 | 2009-11-23 17:57:54 +0000 | [diff] [blame] | 1297 | static bool ShouldNullCheckClassCastValue(const CastExpr *CE) { |
| 1298 | const Expr *E = CE->getSubExpr(); |
John McCall | 23cba80 | 2010-03-30 23:58:03 +0000 | [diff] [blame] | 1299 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1300 | if (CE->getCastKind() == CK_UncheckedDerivedToBase) |
John McCall | 23cba80 | 2010-03-30 23:58:03 +0000 | [diff] [blame] | 1301 | return false; |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1302 | |
Anders Carlsson | a3697c9 | 2009-11-23 17:57:54 +0000 | [diff] [blame] | 1303 | if (isa<CXXThisExpr>(E)) { |
| 1304 | // We always assume that 'this' is never null. |
| 1305 | return false; |
| 1306 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1307 | |
Anders Carlsson | a3697c9 | 2009-11-23 17:57:54 +0000 | [diff] [blame] | 1308 | if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(CE)) { |
Sebastian Redl | 906082e | 2010-07-20 04:20:21 +0000 | [diff] [blame] | 1309 | // And that glvalue casts are never null. |
John McCall | 5baba9d | 2010-08-25 10:28:54 +0000 | [diff] [blame] | 1310 | if (ICE->getValueKind() != VK_RValue) |
Anders Carlsson | a3697c9 | 2009-11-23 17:57:54 +0000 | [diff] [blame] | 1311 | return false; |
| 1312 | } |
| 1313 | |
| 1314 | return true; |
| 1315 | } |
| 1316 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1317 | // VisitCastExpr - Emit code for an explicit or implicit cast. Implicit casts |
| 1318 | // have to handle a more broad range of conversions than explicit casts, as they |
| 1319 | // handle things like function to ptr-to-function decay etc. |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1320 | Value *ScalarExprEmitter::VisitCastExpr(CastExpr *CE) { |
Eli Friedman | d888962 | 2009-11-27 04:41:50 +0000 | [diff] [blame] | 1321 | Expr *E = CE->getSubExpr(); |
Anders Carlsson | 592a2bb | 2009-09-22 22:00:46 +0000 | [diff] [blame] | 1322 | QualType DestTy = CE->getType(); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1323 | CastKind Kind = CE->getCastKind(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1324 | |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 1325 | if (!DestTy->isVoidType()) |
| 1326 | TestAndClearIgnoreResultAssign(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1327 | |
Eli Friedman | 8c3e7e7 | 2009-11-27 02:07:44 +0000 | [diff] [blame] | 1328 | // Since almost all cast kinds apply to scalars, this switch doesn't have |
| 1329 | // a default case, so the compiler will warn on a missing case. The cases |
| 1330 | // are in the same order as in the CastKind enum. |
Anders Carlsson | e977624 | 2009-08-24 18:26:39 +0000 | [diff] [blame] | 1331 | switch (Kind) { |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 1332 | case CK_Dependent: llvm_unreachable("dependent cast kind in IR gen!"); |
Eli Friedman | a6c66ce | 2012-08-31 00:14:07 +0000 | [diff] [blame] | 1333 | case CK_BuiltinFnToFnPtr: |
| 1334 | llvm_unreachable("builtin functions are handled elsewhere"); |
| 1335 | |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1336 | case CK_LValueBitCast: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1337 | case CK_ObjCObjectLValueCast: { |
Douglas Gregor | e39a389 | 2010-07-13 23:17:26 +0000 | [diff] [blame] | 1338 | Value *V = EmitLValue(E).getAddress(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1339 | V = Builder.CreateBitCast(V, |
Douglas Gregor | e39a389 | 2010-07-13 23:17:26 +0000 | [diff] [blame] | 1340 | ConvertType(CGF.getContext().getPointerType(DestTy))); |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 1341 | return EmitLoadOfLValue(CGF.MakeNaturalAlignAddrLValue(V, DestTy), |
| 1342 | CE->getExprLoc()); |
Douglas Gregor | e39a389 | 2010-07-13 23:17:26 +0000 | [diff] [blame] | 1343 | } |
John McCall | dc05b11 | 2011-09-10 01:16:55 +0000 | [diff] [blame] | 1344 | |
John McCall | 1d9b3b2 | 2011-09-09 05:25:32 +0000 | [diff] [blame] | 1345 | case CK_CPointerToObjCPointerCast: |
| 1346 | case CK_BlockPointerToObjCPointerCast: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1347 | case CK_AnyPointerToBlockPointerCast: |
| 1348 | case CK_BitCast: { |
Anders Carlsson | cb3c308 | 2009-09-01 20:52:42 +0000 | [diff] [blame] | 1349 | Value *Src = Visit(const_cast<Expr*>(E)); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1350 | llvm::Type *SrcTy = Src->getType(); |
| 1351 | llvm::Type *DstTy = ConvertType(DestTy); |
| 1352 | if (SrcTy->isPtrOrPtrVectorTy() && DstTy->isPtrOrPtrVectorTy() && |
| 1353 | SrcTy->getPointerAddressSpace() != DstTy->getPointerAddressSpace()) { |
| 1354 | llvm::Type *MidTy = CGF.CGM.getDataLayout().getIntPtrType(SrcTy); |
| 1355 | return Builder.CreateIntToPtr(Builder.CreatePtrToInt(Src, MidTy), DstTy); |
| 1356 | } |
| 1357 | return Builder.CreateBitCast(Src, DstTy); |
| 1358 | } |
| 1359 | case CK_AddressSpaceConversion: { |
| 1360 | Value *Src = Visit(const_cast<Expr*>(E)); |
| 1361 | return Builder.CreateAddrSpaceCast(Src, ConvertType(DestTy)); |
Anders Carlsson | cb3c308 | 2009-09-01 20:52:42 +0000 | [diff] [blame] | 1362 | } |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1363 | case CK_AtomicToNonAtomic: |
| 1364 | case CK_NonAtomicToAtomic: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1365 | case CK_NoOp: |
| 1366 | case CK_UserDefinedConversion: |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1367 | return Visit(const_cast<Expr*>(E)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1368 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1369 | case CK_BaseToDerived: { |
Jordan Rose | 041ce8e | 2012-10-03 01:08:28 +0000 | [diff] [blame] | 1370 | const CXXRecordDecl *DerivedClassDecl = DestTy->getPointeeCXXRecordDecl(); |
| 1371 | assert(DerivedClassDecl && "BaseToDerived arg isn't a C++ object pointer!"); |
| 1372 | |
Richard Smith | c764830 | 2013-02-13 21:18:23 +0000 | [diff] [blame] | 1373 | llvm::Value *V = Visit(E); |
| 1374 | |
Filipe Cabecinhas | 8593e78 | 2013-08-08 01:08:17 +0000 | [diff] [blame] | 1375 | llvm::Value *Derived = |
| 1376 | CGF.GetAddressOfDerivedClass(V, DerivedClassDecl, |
| 1377 | CE->path_begin(), CE->path_end(), |
| 1378 | ShouldNullCheckClassCastValue(CE)); |
| 1379 | |
Richard Smith | c764830 | 2013-02-13 21:18:23 +0000 | [diff] [blame] | 1380 | // C++11 [expr.static.cast]p11: Behavior is undefined if a downcast is |
| 1381 | // performed and the object is not of the derived type. |
Stephen Hines | c568f1e | 2014-07-21 00:47:37 -0700 | [diff] [blame] | 1382 | if (CGF.sanitizePerformTypeCheck()) |
Richard Smith | c764830 | 2013-02-13 21:18:23 +0000 | [diff] [blame] | 1383 | CGF.EmitTypeCheck(CodeGenFunction::TCK_DowncastPointer, CE->getExprLoc(), |
Filipe Cabecinhas | 8593e78 | 2013-08-08 01:08:17 +0000 | [diff] [blame] | 1384 | Derived, DestTy->getPointeeType()); |
Richard Smith | c764830 | 2013-02-13 21:18:23 +0000 | [diff] [blame] | 1385 | |
Filipe Cabecinhas | 8593e78 | 2013-08-08 01:08:17 +0000 | [diff] [blame] | 1386 | return Derived; |
Anders Carlsson | a3697c9 | 2009-11-23 17:57:54 +0000 | [diff] [blame] | 1387 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1388 | case CK_UncheckedDerivedToBase: |
| 1389 | case CK_DerivedToBase: { |
Jordan Rose | 041ce8e | 2012-10-03 01:08:28 +0000 | [diff] [blame] | 1390 | const CXXRecordDecl *DerivedClassDecl = |
| 1391 | E->getType()->getPointeeCXXRecordDecl(); |
| 1392 | assert(DerivedClassDecl && "DerivedToBase arg isn't a C++ object pointer!"); |
Anders Carlsson | 191dfe9 | 2009-09-12 04:57:16 +0000 | [diff] [blame] | 1393 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1394 | return CGF.GetAddressOfBaseClass( |
| 1395 | Visit(E), DerivedClassDecl, CE->path_begin(), CE->path_end(), |
| 1396 | ShouldNullCheckClassCastValue(CE), CE->getExprLoc()); |
Anders Carlsson | 191dfe9 | 2009-09-12 04:57:16 +0000 | [diff] [blame] | 1397 | } |
Anders Carlsson | 575b374 | 2011-04-11 02:03:26 +0000 | [diff] [blame] | 1398 | case CK_Dynamic: { |
Eli Friedman | 8c3e7e7 | 2009-11-27 02:07:44 +0000 | [diff] [blame] | 1399 | Value *V = Visit(const_cast<Expr*>(E)); |
| 1400 | const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(CE); |
| 1401 | return CGF.EmitDynamicCast(V, DCE); |
| 1402 | } |
Eli Friedman | d888962 | 2009-11-27 04:41:50 +0000 | [diff] [blame] | 1403 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1404 | case CK_ArrayToPointerDecay: { |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1405 | assert(E->getType()->isArrayType() && |
| 1406 | "Array to pointer decay must have array source type!"); |
| 1407 | |
| 1408 | Value *V = EmitLValue(E).getAddress(); // Bitfields can't be arrays. |
| 1409 | |
| 1410 | // Note that VLA pointers are always decayed, so we don't need to do |
| 1411 | // anything here. |
| 1412 | if (!E->getType()->isVariableArrayType()) { |
| 1413 | assert(isa<llvm::PointerType>(V->getType()) && "Expected pointer"); |
| 1414 | assert(isa<llvm::ArrayType>(cast<llvm::PointerType>(V->getType()) |
| 1415 | ->getElementType()) && |
| 1416 | "Expected pointer to array"); |
| 1417 | V = Builder.CreateStructGEP(V, 0, "arraydecay"); |
| 1418 | } |
| 1419 | |
Chris Lattner | 410b12e | 2011-07-20 04:31:01 +0000 | [diff] [blame] | 1420 | // Make sure the array decay ends up being the right type. This matters if |
| 1421 | // the array type was of an incomplete type. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1422 | return CGF.Builder.CreatePointerCast(V, ConvertType(CE->getType())); |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1423 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1424 | case CK_FunctionToPointerDecay: |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1425 | return EmitLValue(E).getAddress(); |
| 1426 | |
John McCall | 404cd16 | 2010-11-13 01:35:44 +0000 | [diff] [blame] | 1427 | case CK_NullToPointer: |
| 1428 | if (MustVisitNullValue(E)) |
| 1429 | (void) Visit(E); |
| 1430 | |
| 1431 | return llvm::ConstantPointerNull::get( |
| 1432 | cast<llvm::PointerType>(ConvertType(DestTy))); |
| 1433 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1434 | case CK_NullToMemberPointer: { |
John McCall | 404cd16 | 2010-11-13 01:35:44 +0000 | [diff] [blame] | 1435 | if (MustVisitNullValue(E)) |
John McCall | d608cdb | 2010-08-22 10:59:02 +0000 | [diff] [blame] | 1436 | (void) Visit(E); |
| 1437 | |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 1438 | const MemberPointerType *MPT = CE->getType()->getAs<MemberPointerType>(); |
| 1439 | return CGF.CGM.getCXXABI().EmitNullMemberPointer(MPT); |
| 1440 | } |
Anders Carlsson | 191dfe9 | 2009-09-12 04:57:16 +0000 | [diff] [blame] | 1441 | |
John McCall | 4d4e5c1 | 2012-02-15 01:22:51 +0000 | [diff] [blame] | 1442 | case CK_ReinterpretMemberPointer: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1443 | case CK_BaseToDerivedMemberPointer: |
| 1444 | case CK_DerivedToBaseMemberPointer: { |
Eli Friedman | d888962 | 2009-11-27 04:41:50 +0000 | [diff] [blame] | 1445 | Value *Src = Visit(E); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1446 | |
John McCall | d608cdb | 2010-08-22 10:59:02 +0000 | [diff] [blame] | 1447 | // Note that the AST doesn't distinguish between checked and |
| 1448 | // unchecked member pointer conversions, so we always have to |
| 1449 | // implement checked conversions here. This is inefficient when |
| 1450 | // actual control flow may be required in order to perform the |
| 1451 | // check, which it is for data member pointers (but not member |
| 1452 | // function pointers on Itanium and ARM). |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 1453 | return CGF.CGM.getCXXABI().EmitMemberPointerConversion(CGF, CE, Src); |
Eli Friedman | d888962 | 2009-11-27 04:41:50 +0000 | [diff] [blame] | 1454 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1455 | |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 1456 | case CK_ARCProduceObject: |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1457 | return CGF.EmitARCRetainScalarExpr(E); |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 1458 | case CK_ARCConsumeObject: |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1459 | return CGF.EmitObjCConsumeObject(E->getType(), Visit(E)); |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 1460 | case CK_ARCReclaimReturnedObject: { |
John McCall | 7e5e5f4 | 2011-07-07 06:58:02 +0000 | [diff] [blame] | 1461 | llvm::Value *value = Visit(E); |
| 1462 | value = CGF.EmitARCRetainAutoreleasedReturnValue(value); |
| 1463 | return CGF.EmitObjCConsumeObject(E->getType(), value); |
| 1464 | } |
John McCall | 348f16f | 2011-10-04 06:23:45 +0000 | [diff] [blame] | 1465 | case CK_ARCExtendBlockObject: |
| 1466 | return CGF.EmitARCExtendBlockObject(E); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1467 | |
Douglas Gregor | ac1303e | 2012-02-22 05:02:47 +0000 | [diff] [blame] | 1468 | case CK_CopyAndAutoreleaseBlockObject: |
Eli Friedman | cae40c4 | 2012-02-28 01:08:45 +0000 | [diff] [blame] | 1469 | return CGF.EmitBlockCopyAndAutorelease(Visit(E), E->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1470 | |
John McCall | 2bb5d00 | 2010-11-13 09:02:35 +0000 | [diff] [blame] | 1471 | case CK_FloatingRealToComplex: |
| 1472 | case CK_FloatingComplexCast: |
| 1473 | case CK_IntegralRealToComplex: |
| 1474 | case CK_IntegralComplexCast: |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 1475 | case CK_IntegralComplexToFloatingComplex: |
| 1476 | case CK_FloatingComplexToIntegralComplex: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1477 | case CK_ConstructorConversion: |
John McCall | 61ad0e6 | 2010-11-16 06:21:14 +0000 | [diff] [blame] | 1478 | case CK_ToUnion: |
| 1479 | llvm_unreachable("scalar cast to non-scalar value"); |
John McCall | f6a1648 | 2010-12-04 03:47:34 +0000 | [diff] [blame] | 1480 | |
John McCall | 0ae287a | 2010-12-01 04:43:34 +0000 | [diff] [blame] | 1481 | case CK_LValueToRValue: |
| 1482 | assert(CGF.getContext().hasSameUnqualifiedType(E->getType(), DestTy)); |
John McCall | f6a1648 | 2010-12-04 03:47:34 +0000 | [diff] [blame] | 1483 | assert(E->isGLValue() && "lvalue-to-rvalue applied to r-value!"); |
John McCall | 0ae287a | 2010-12-01 04:43:34 +0000 | [diff] [blame] | 1484 | return Visit(const_cast<Expr*>(E)); |
Eli Friedman | 8c3e7e7 | 2009-11-27 02:07:44 +0000 | [diff] [blame] | 1485 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1486 | case CK_IntegralToPointer: { |
Anders Carlsson | 7f9e646 | 2009-09-15 04:48:33 +0000 | [diff] [blame] | 1487 | Value *Src = Visit(const_cast<Expr*>(E)); |
Daniel Dunbar | 89f176d | 2010-08-25 03:32:38 +0000 | [diff] [blame] | 1488 | |
Anders Carlsson | 82debc7 | 2009-10-18 18:12:03 +0000 | [diff] [blame] | 1489 | // First, convert to the correct width so that we control the kind of |
| 1490 | // extension. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1491 | llvm::Type *MiddleTy = CGF.IntPtrTy; |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 1492 | bool InputSigned = E->getType()->isSignedIntegerOrEnumerationType(); |
Anders Carlsson | 82debc7 | 2009-10-18 18:12:03 +0000 | [diff] [blame] | 1493 | llvm::Value* IntResult = |
| 1494 | Builder.CreateIntCast(Src, MiddleTy, InputSigned, "conv"); |
Daniel Dunbar | 89f176d | 2010-08-25 03:32:38 +0000 | [diff] [blame] | 1495 | |
Anders Carlsson | 82debc7 | 2009-10-18 18:12:03 +0000 | [diff] [blame] | 1496 | return Builder.CreateIntToPtr(IntResult, ConvertType(DestTy)); |
Anders Carlsson | 7f9e646 | 2009-09-15 04:48:33 +0000 | [diff] [blame] | 1497 | } |
Eli Friedman | 6594942 | 2011-06-25 02:58:47 +0000 | [diff] [blame] | 1498 | case CK_PointerToIntegral: |
| 1499 | assert(!DestTy->isBooleanType() && "bool should use PointerToBool"); |
| 1500 | return Builder.CreatePtrToInt(Visit(E), ConvertType(DestTy)); |
Daniel Dunbar | 89f176d | 2010-08-25 03:32:38 +0000 | [diff] [blame] | 1501 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1502 | case CK_ToVoid: { |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 1503 | CGF.EmitIgnoredExpr(E); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1504 | return nullptr; |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1505 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1506 | case CK_VectorSplat: { |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1507 | llvm::Type *DstTy = ConvertType(DestTy); |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1508 | Value *Elt = Visit(const_cast<Expr*>(E)); |
Craig Topper | 5fa5608 | 2012-02-06 05:05:50 +0000 | [diff] [blame] | 1509 | Elt = EmitScalarConversion(Elt, E->getType(), |
| 1510 | DestTy->getAs<VectorType>()->getElementType()); |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1511 | |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1512 | // Splat the element across to all elements |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1513 | unsigned NumElements = cast<llvm::VectorType>(DstTy)->getNumElements(); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1514 | return Builder.CreateVectorSplat(NumElements, Elt, "splat"); |
Eli Friedman | ad35a83 | 2009-11-16 21:33:53 +0000 | [diff] [blame] | 1515 | } |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 1516 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1517 | case CK_IntegralCast: |
| 1518 | case CK_IntegralToFloating: |
| 1519 | case CK_FloatingToIntegral: |
| 1520 | case CK_FloatingCast: |
Eli Friedman | d888962 | 2009-11-27 04:41:50 +0000 | [diff] [blame] | 1521 | return EmitScalarConversion(Visit(E), E->getType(), DestTy); |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 1522 | case CK_IntegralToBoolean: |
| 1523 | return EmitIntToBoolConversion(Visit(E)); |
| 1524 | case CK_PointerToBoolean: |
| 1525 | return EmitPointerToBoolConversion(Visit(E)); |
| 1526 | case CK_FloatingToBoolean: |
| 1527 | return EmitFloatToBoolConversion(Visit(E)); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1528 | case CK_MemberPointerToBoolean: { |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 1529 | llvm::Value *MemPtr = Visit(E); |
| 1530 | const MemberPointerType *MPT = E->getType()->getAs<MemberPointerType>(); |
| 1531 | return CGF.CGM.getCXXABI().EmitMemberPointerIsNotNull(CGF, MemPtr, MPT); |
Anders Carlsson | e977624 | 2009-08-24 18:26:39 +0000 | [diff] [blame] | 1532 | } |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 1533 | |
| 1534 | case CK_FloatingComplexToReal: |
| 1535 | case CK_IntegralComplexToReal: |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 1536 | return CGF.EmitComplexExpr(E, false, true).first; |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 1537 | |
| 1538 | case CK_FloatingComplexToBoolean: |
| 1539 | case CK_IntegralComplexToBoolean: { |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 1540 | CodeGenFunction::ComplexPairTy V = CGF.EmitComplexExpr(E); |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 1541 | |
| 1542 | // TODO: kill this function off, inline appropriate case here |
| 1543 | return EmitComplexToScalarConversion(V, E->getType(), DestTy); |
| 1544 | } |
| 1545 | |
Guy Benyei | e6b9d80 | 2013-01-20 12:31:11 +0000 | [diff] [blame] | 1546 | case CK_ZeroToOCLEvent: { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1547 | assert(DestTy->isEventT() && "CK_ZeroToOCLEvent cast on non-event type"); |
Guy Benyei | e6b9d80 | 2013-01-20 12:31:11 +0000 | [diff] [blame] | 1548 | return llvm::Constant::getNullValue(ConvertType(DestTy)); |
| 1549 | } |
| 1550 | |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 1551 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1552 | |
John McCall | 61ad0e6 | 2010-11-16 06:21:14 +0000 | [diff] [blame] | 1553 | llvm_unreachable("unknown scalar cast"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1554 | } |
| 1555 | |
Chris Lattner | 3379320 | 2007-08-31 22:09:40 +0000 | [diff] [blame] | 1556 | Value *ScalarExprEmitter::VisitStmtExpr(const StmtExpr *E) { |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 1557 | CodeGenFunction::StmtExprEvaluation eval(CGF); |
Eli Friedman | 2ac2fa7 | 2013-06-10 22:04:49 +0000 | [diff] [blame] | 1558 | llvm::Value *RetAlloca = CGF.EmitCompoundStmt(*E->getSubStmt(), |
| 1559 | !E->getType()->isVoidType()); |
| 1560 | if (!RetAlloca) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1561 | return nullptr; |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 1562 | return CGF.EmitLoadOfScalar(CGF.MakeAddrLValue(RetAlloca, E->getType()), |
| 1563 | E->getExprLoc()); |
Chris Lattner | 3379320 | 2007-08-31 22:09:40 +0000 | [diff] [blame] | 1564 | } |
| 1565 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1566 | //===----------------------------------------------------------------------===// |
| 1567 | // Unary Operators |
| 1568 | //===----------------------------------------------------------------------===// |
| 1569 | |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1570 | llvm::Value *ScalarExprEmitter:: |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1571 | EmitAddConsiderOverflowBehavior(const UnaryOperator *E, |
| 1572 | llvm::Value *InVal, |
| 1573 | llvm::Value *NextVal, bool IsInc) { |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 1574 | switch (CGF.getLangOpts().getSignedOverflowBehavior()) { |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1575 | case LangOptions::SOB_Defined: |
| 1576 | return Builder.CreateAdd(InVal, NextVal, IsInc ? "inc" : "dec"); |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 1577 | case LangOptions::SOB_Undefined: |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1578 | if (!CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 1579 | return Builder.CreateNSWAdd(InVal, NextVal, IsInc ? "inc" : "dec"); |
| 1580 | // Fall through. |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1581 | case LangOptions::SOB_Trapping: |
| 1582 | BinOpInfo BinOp; |
| 1583 | BinOp.LHS = InVal; |
| 1584 | BinOp.RHS = NextVal; |
| 1585 | BinOp.Ty = E->getType(); |
| 1586 | BinOp.Opcode = BO_Add; |
Benjamin Kramer | ddc5733 | 2012-10-03 20:58:04 +0000 | [diff] [blame] | 1587 | BinOp.FPContractable = false; |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1588 | BinOp.E = E; |
| 1589 | return EmitOverflowCheckedBinOp(BinOp); |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1590 | } |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1591 | llvm_unreachable("Unknown SignedOverflowBehaviorTy"); |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1592 | } |
| 1593 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1594 | llvm::Value * |
| 1595 | ScalarExprEmitter::EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV, |
| 1596 | bool isInc, bool isPre) { |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1597 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1598 | QualType type = E->getSubExpr()->getType(); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1599 | llvm::PHINode *atomicPHI = nullptr; |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1600 | llvm::Value *value; |
| 1601 | llvm::Value *input; |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1602 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1603 | int amount = (isInc ? 1 : -1); |
| 1604 | |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1605 | if (const AtomicType *atomicTy = type->getAs<AtomicType>()) { |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1606 | type = atomicTy->getValueType(); |
| 1607 | if (isInc && type->isBooleanType()) { |
| 1608 | llvm::Value *True = CGF.EmitToMemory(Builder.getTrue(), type); |
| 1609 | if (isPre) { |
| 1610 | Builder.Insert(new llvm::StoreInst(True, |
| 1611 | LV.getAddress(), LV.isVolatileQualified(), |
| 1612 | LV.getAlignment().getQuantity(), |
| 1613 | llvm::SequentiallyConsistent)); |
| 1614 | return Builder.getTrue(); |
| 1615 | } |
| 1616 | // For atomic bool increment, we just store true and return it for |
| 1617 | // preincrement, do an atomic swap with true for postincrement |
| 1618 | return Builder.CreateAtomicRMW(llvm::AtomicRMWInst::Xchg, |
| 1619 | LV.getAddress(), True, llvm::SequentiallyConsistent); |
| 1620 | } |
| 1621 | // Special case for atomic increment / decrement on integers, emit |
| 1622 | // atomicrmw instructions. We skip this if we want to be doing overflow |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1623 | // checking, and fall into the slow path with the atomic cmpxchg loop. |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1624 | if (!type->isBooleanType() && type->isIntegerType() && |
| 1625 | !(type->isUnsignedIntegerType() && |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1626 | CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) && |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1627 | CGF.getLangOpts().getSignedOverflowBehavior() != |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1628 | LangOptions::SOB_Trapping) { |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1629 | llvm::AtomicRMWInst::BinOp aop = isInc ? llvm::AtomicRMWInst::Add : |
| 1630 | llvm::AtomicRMWInst::Sub; |
| 1631 | llvm::Instruction::BinaryOps op = isInc ? llvm::Instruction::Add : |
| 1632 | llvm::Instruction::Sub; |
| 1633 | llvm::Value *amt = CGF.EmitToMemory( |
| 1634 | llvm::ConstantInt::get(ConvertType(type), 1, true), type); |
| 1635 | llvm::Value *old = Builder.CreateAtomicRMW(aop, |
| 1636 | LV.getAddress(), amt, llvm::SequentiallyConsistent); |
| 1637 | return isPre ? Builder.CreateBinOp(op, old, amt) : old; |
| 1638 | } |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 1639 | value = EmitLoadOfLValue(LV, E->getExprLoc()); |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1640 | input = value; |
| 1641 | // 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] | 1642 | llvm::BasicBlock *startBB = Builder.GetInsertBlock(); |
| 1643 | llvm::BasicBlock *opBB = CGF.createBasicBlock("atomic_op", CGF.CurFn); |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1644 | value = CGF.EmitToMemory(value, type); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1645 | Builder.CreateBr(opBB); |
| 1646 | Builder.SetInsertPoint(opBB); |
| 1647 | atomicPHI = Builder.CreatePHI(value->getType(), 2); |
| 1648 | atomicPHI->addIncoming(value, startBB); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1649 | value = atomicPHI; |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1650 | } else { |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 1651 | value = EmitLoadOfLValue(LV, E->getExprLoc()); |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 1652 | input = value; |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1653 | } |
| 1654 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1655 | // Special case of integer increment that we have to check first: bool++. |
| 1656 | // Due to promotion rules, we get: |
| 1657 | // bool++ -> bool = bool + 1 |
| 1658 | // -> bool = (int)bool + 1 |
| 1659 | // -> bool = ((int)bool + 1 != 0) |
| 1660 | // An interesting aspect of this is that increment is always true. |
| 1661 | // Decrement does not have this property. |
| 1662 | if (isInc && type->isBooleanType()) { |
| 1663 | value = Builder.getTrue(); |
| 1664 | |
| 1665 | // Most common case by far: integer increment. |
| 1666 | } else if (type->isIntegerType()) { |
| 1667 | |
Michael Liao | 36d5cea | 2012-08-28 16:55:13 +0000 | [diff] [blame] | 1668 | llvm::Value *amt = llvm::ConstantInt::get(value->getType(), amount, true); |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1669 | |
Eli Friedman | fa0b409 | 2011-03-02 01:49:12 +0000 | [diff] [blame] | 1670 | // Note that signed integer inc/dec with width less than int can't |
| 1671 | // 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] | 1672 | bool CanOverflow = value->getType()->getIntegerBitWidth() >= |
| 1673 | CGF.IntTy->getIntegerBitWidth(); |
| 1674 | if (CanOverflow && type->isSignedIntegerOrEnumerationType()) { |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1675 | value = EmitAddConsiderOverflowBehavior(E, value, amt, isInc); |
Stephen Hines | c568f1e | 2014-07-21 00:47:37 -0700 | [diff] [blame] | 1676 | } else if (CanOverflow && type->isUnsignedIntegerType() && |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1677 | CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) { |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 1678 | BinOpInfo BinOp; |
| 1679 | BinOp.LHS = value; |
| 1680 | BinOp.RHS = llvm::ConstantInt::get(value->getType(), 1, false); |
| 1681 | BinOp.Ty = E->getType(); |
| 1682 | BinOp.Opcode = isInc ? BO_Add : BO_Sub; |
| 1683 | BinOp.FPContractable = false; |
| 1684 | BinOp.E = E; |
| 1685 | value = EmitOverflowCheckedBinOp(BinOp); |
| 1686 | } else |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1687 | value = Builder.CreateAdd(value, amt, isInc ? "inc" : "dec"); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1688 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1689 | // Next most common: pointer increment. |
| 1690 | } else if (const PointerType *ptr = type->getAs<PointerType>()) { |
| 1691 | QualType type = ptr->getPointeeType(); |
| 1692 | |
| 1693 | // VLA types don't have constant size. |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 1694 | if (const VariableArrayType *vla |
| 1695 | = CGF.getContext().getAsVariableArrayType(type)) { |
| 1696 | llvm::Value *numElts = CGF.getVLASize(vla).first; |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1697 | if (!isInc) numElts = Builder.CreateNSWNeg(numElts, "vla.negsize"); |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 1698 | if (CGF.getLangOpts().isSignedOverflowDefined()) |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1699 | value = Builder.CreateGEP(value, numElts, "vla.inc"); |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1700 | else |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1701 | value = Builder.CreateInBoundsGEP(value, numElts, "vla.inc"); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1702 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1703 | // Arithmetic on function pointers (!) is just +-1. |
| 1704 | } else if (type->isFunctionType()) { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1705 | llvm::Value *amt = Builder.getInt32(amount); |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1706 | |
| 1707 | value = CGF.EmitCastToVoidPtr(value); |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 1708 | if (CGF.getLangOpts().isSignedOverflowDefined()) |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1709 | value = Builder.CreateGEP(value, amt, "incdec.funcptr"); |
| 1710 | else |
| 1711 | value = Builder.CreateInBoundsGEP(value, amt, "incdec.funcptr"); |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1712 | value = Builder.CreateBitCast(value, input->getType()); |
| 1713 | |
| 1714 | // For everything else, we can just do a simple increment. |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1715 | } else { |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 1716 | llvm::Value *amt = Builder.getInt32(amount); |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 1717 | if (CGF.getLangOpts().isSignedOverflowDefined()) |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1718 | value = Builder.CreateGEP(value, amt, "incdec.ptr"); |
| 1719 | else |
| 1720 | value = Builder.CreateInBoundsGEP(value, amt, "incdec.ptr"); |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1721 | } |
| 1722 | |
| 1723 | // Vector increment/decrement. |
| 1724 | } else if (type->isVectorType()) { |
| 1725 | if (type->hasIntegerRepresentation()) { |
| 1726 | llvm::Value *amt = llvm::ConstantInt::get(value->getType(), amount); |
| 1727 | |
Eli Friedman | d4b9ee3 | 2011-05-06 18:04:18 +0000 | [diff] [blame] | 1728 | value = Builder.CreateAdd(value, amt, isInc ? "inc" : "dec"); |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1729 | } else { |
| 1730 | value = Builder.CreateFAdd( |
| 1731 | value, |
| 1732 | llvm::ConstantFP::get(value->getType(), amount), |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1733 | isInc ? "inc" : "dec"); |
| 1734 | } |
Anton Yartsev | 683564a | 2011-02-07 02:17:30 +0000 | [diff] [blame] | 1735 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1736 | // Floating point. |
| 1737 | } else if (type->isRealFloatingType()) { |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1738 | // Add the inc/dec to the real part. |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1739 | llvm::Value *amt; |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 1740 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1741 | if (type->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType && |
| 1742 | !CGF.getContext().getLangOpts().HalfArgsAndReturns) { |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 1743 | // Another special case: half FP increment should be done via float |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1744 | value = Builder.CreateCall( |
| 1745 | CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_from_fp16, |
| 1746 | CGF.CGM.FloatTy), |
| 1747 | input); |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 1748 | } |
| 1749 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1750 | if (value->getType()->isFloatTy()) |
| 1751 | amt = llvm::ConstantFP::get(VMContext, |
| 1752 | llvm::APFloat(static_cast<float>(amount))); |
| 1753 | else if (value->getType()->isDoubleTy()) |
| 1754 | amt = llvm::ConstantFP::get(VMContext, |
| 1755 | llvm::APFloat(static_cast<double>(amount))); |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1756 | else { |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1757 | llvm::APFloat F(static_cast<float>(amount)); |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1758 | bool ignored; |
John McCall | 64aa4b3 | 2013-04-16 22:48:15 +0000 | [diff] [blame] | 1759 | F.convert(CGF.getTarget().getLongDoubleFormat(), |
| 1760 | llvm::APFloat::rmTowardZero, &ignored); |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1761 | amt = llvm::ConstantFP::get(VMContext, F); |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1762 | } |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1763 | value = Builder.CreateFAdd(value, amt, isInc ? "inc" : "dec"); |
| 1764 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1765 | if (type->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType && |
| 1766 | !CGF.getContext().getLangOpts().HalfArgsAndReturns) |
| 1767 | value = Builder.CreateCall( |
| 1768 | CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_to_fp16, |
| 1769 | CGF.CGM.FloatTy), |
| 1770 | value); |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 1771 | |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1772 | // Objective-C pointer types. |
| 1773 | } else { |
| 1774 | const ObjCObjectPointerType *OPT = type->castAs<ObjCObjectPointerType>(); |
| 1775 | value = CGF.EmitCastToVoidPtr(value); |
| 1776 | |
| 1777 | CharUnits size = CGF.getContext().getTypeSizeInChars(OPT->getObjectType()); |
| 1778 | if (!isInc) size = -size; |
| 1779 | llvm::Value *sizeValue = |
| 1780 | llvm::ConstantInt::get(CGF.SizeTy, size.getQuantity()); |
| 1781 | |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 1782 | if (CGF.getLangOpts().isSignedOverflowDefined()) |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1783 | value = Builder.CreateGEP(value, sizeValue, "incdec.objptr"); |
| 1784 | else |
| 1785 | value = Builder.CreateInBoundsGEP(value, sizeValue, "incdec.objptr"); |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1786 | value = Builder.CreateBitCast(value, input->getType()); |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1787 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1788 | |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1789 | if (atomicPHI) { |
| 1790 | llvm::BasicBlock *opBB = Builder.GetInsertBlock(); |
| 1791 | llvm::BasicBlock *contBB = CGF.createBasicBlock("atomic_cont", CGF.CurFn); |
Stephen Hines | c568f1e | 2014-07-21 00:47:37 -0700 | [diff] [blame] | 1792 | llvm::Value *pair = Builder.CreateAtomicCmpXchg( |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1793 | LV.getAddress(), atomicPHI, CGF.EmitToMemory(value, type), |
| 1794 | llvm::SequentiallyConsistent, llvm::SequentiallyConsistent); |
Stephen Hines | c568f1e | 2014-07-21 00:47:37 -0700 | [diff] [blame] | 1795 | llvm::Value *old = Builder.CreateExtractValue(pair, 0); |
| 1796 | llvm::Value *success = Builder.CreateExtractValue(pair, 1); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1797 | atomicPHI->addIncoming(old, opBB); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 1798 | Builder.CreateCondBr(success, contBB, opBB); |
| 1799 | Builder.SetInsertPoint(contBB); |
| 1800 | return isPre ? value : input; |
| 1801 | } |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 1802 | |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1803 | // Store the updated result through the lvalue. |
| 1804 | if (LV.isBitField()) |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 1805 | CGF.EmitStoreThroughBitfieldLValue(RValue::get(value), LV, &value); |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1806 | else |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 1807 | CGF.EmitStoreThroughLValue(RValue::get(value), LV); |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 1808 | |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1809 | // If this is a postinc, return the value read from memory, otherwise use the |
| 1810 | // updated value. |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1811 | return isPre ? value : input; |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 1812 | } |
| 1813 | |
| 1814 | |
| 1815 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1816 | Value *ScalarExprEmitter::VisitUnaryMinus(const UnaryOperator *E) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 1817 | TestAndClearIgnoreResultAssign(); |
Chris Lattner | 9a20723 | 2010-06-26 21:48:21 +0000 | [diff] [blame] | 1818 | // Emit unary minus with EmitSub so we handle overflow cases etc. |
| 1819 | BinOpInfo BinOp; |
Chris Lattner | 4ac0d83 | 2010-06-28 17:12:37 +0000 | [diff] [blame] | 1820 | BinOp.RHS = Visit(E->getSubExpr()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1821 | |
Chris Lattner | 4ac0d83 | 2010-06-28 17:12:37 +0000 | [diff] [blame] | 1822 | if (BinOp.RHS->getType()->isFPOrFPVectorTy()) |
| 1823 | BinOp.LHS = llvm::ConstantFP::getZeroValueForNegation(BinOp.RHS->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1824 | else |
Chris Lattner | 4ac0d83 | 2010-06-28 17:12:37 +0000 | [diff] [blame] | 1825 | BinOp.LHS = llvm::Constant::getNullValue(BinOp.RHS->getType()); |
Chris Lattner | 9a20723 | 2010-06-26 21:48:21 +0000 | [diff] [blame] | 1826 | BinOp.Ty = E->getType(); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1827 | BinOp.Opcode = BO_Sub; |
Benjamin Kramer | ddc5733 | 2012-10-03 20:58:04 +0000 | [diff] [blame] | 1828 | BinOp.FPContractable = false; |
Chris Lattner | 9a20723 | 2010-06-26 21:48:21 +0000 | [diff] [blame] | 1829 | BinOp.E = E; |
| 1830 | return EmitSub(BinOp); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1831 | } |
| 1832 | |
| 1833 | Value *ScalarExprEmitter::VisitUnaryNot(const UnaryOperator *E) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 1834 | TestAndClearIgnoreResultAssign(); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1835 | Value *Op = Visit(E->getSubExpr()); |
| 1836 | return Builder.CreateNot(Op, "neg"); |
| 1837 | } |
| 1838 | |
| 1839 | Value *ScalarExprEmitter::VisitUnaryLNot(const UnaryOperator *E) { |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 1840 | // Perform vector logical not on comparison with zero vector. |
| 1841 | if (E->getType()->isExtVectorType()) { |
| 1842 | Value *Oper = Visit(E->getSubExpr()); |
| 1843 | Value *Zero = llvm::Constant::getNullValue(Oper->getType()); |
Joey Gouly | 52e933b | 2013-02-21 11:49:56 +0000 | [diff] [blame] | 1844 | Value *Result; |
| 1845 | if (Oper->getType()->isFPOrFPVectorTy()) |
| 1846 | Result = Builder.CreateFCmp(llvm::CmpInst::FCMP_OEQ, Oper, Zero, "cmp"); |
| 1847 | else |
| 1848 | Result = Builder.CreateICmp(llvm::CmpInst::ICMP_EQ, Oper, Zero, "cmp"); |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 1849 | return Builder.CreateSExt(Result, ConvertType(E->getType()), "sext"); |
| 1850 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1851 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1852 | // Compare operand to zero. |
| 1853 | Value *BoolVal = CGF.EvaluateExprAsBool(E->getSubExpr()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1854 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1855 | // Invert value. |
| 1856 | // TODO: Could dynamically modify easy computations here. For example, if |
| 1857 | // the operand is an icmp ne, turn into icmp eq. |
| 1858 | BoolVal = Builder.CreateNot(BoolVal, "lnot"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1859 | |
Anders Carlsson | 9f84d88 | 2009-05-19 18:44:53 +0000 | [diff] [blame] | 1860 | // ZExt result to the expr type. |
| 1861 | return Builder.CreateZExt(BoolVal, ConvertType(E->getType()), "lnot.ext"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1862 | } |
| 1863 | |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1864 | Value *ScalarExprEmitter::VisitOffsetOfExpr(OffsetOfExpr *E) { |
| 1865 | // Try folding the offsetof to a constant. |
Richard Smith | 80d4b55 | 2011-12-28 19:48:30 +0000 | [diff] [blame] | 1866 | llvm::APSInt Value; |
| 1867 | if (E->EvaluateAsInt(Value, CGF.getContext())) |
| 1868 | return Builder.getInt(Value); |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1869 | |
| 1870 | // Loop over the components of the offsetof to compute the value. |
| 1871 | unsigned n = E->getNumComponents(); |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1872 | llvm::Type* ResultType = ConvertType(E->getType()); |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1873 | llvm::Value* Result = llvm::Constant::getNullValue(ResultType); |
| 1874 | QualType CurrentType = E->getTypeSourceInfo()->getType(); |
| 1875 | for (unsigned i = 0; i != n; ++i) { |
| 1876 | OffsetOfExpr::OffsetOfNode ON = E->getComponent(i); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1877 | llvm::Value *Offset = nullptr; |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1878 | switch (ON.getKind()) { |
| 1879 | case OffsetOfExpr::OffsetOfNode::Array: { |
| 1880 | // Compute the index |
| 1881 | Expr *IdxExpr = E->getIndexExpr(ON.getArrayExprIndex()); |
| 1882 | llvm::Value* Idx = CGF.EmitScalarExpr(IdxExpr); |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 1883 | bool IdxSigned = IdxExpr->getType()->isSignedIntegerOrEnumerationType(); |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1884 | Idx = Builder.CreateIntCast(Idx, ResultType, IdxSigned, "conv"); |
| 1885 | |
| 1886 | // Save the element type |
| 1887 | CurrentType = |
| 1888 | CGF.getContext().getAsArrayType(CurrentType)->getElementType(); |
| 1889 | |
| 1890 | // Compute the element size |
| 1891 | llvm::Value* ElemSize = llvm::ConstantInt::get(ResultType, |
| 1892 | CGF.getContext().getTypeSizeInChars(CurrentType).getQuantity()); |
| 1893 | |
| 1894 | // Multiply out to compute the result |
| 1895 | Offset = Builder.CreateMul(Idx, ElemSize); |
| 1896 | break; |
| 1897 | } |
| 1898 | |
| 1899 | case OffsetOfExpr::OffsetOfNode::Field: { |
| 1900 | FieldDecl *MemberDecl = ON.getField(); |
| 1901 | RecordDecl *RD = CurrentType->getAs<RecordType>()->getDecl(); |
| 1902 | const ASTRecordLayout &RL = CGF.getContext().getASTRecordLayout(RD); |
| 1903 | |
| 1904 | // Compute the index of the field in its parent. |
| 1905 | unsigned i = 0; |
| 1906 | // FIXME: It would be nice if we didn't have to loop here! |
| 1907 | for (RecordDecl::field_iterator Field = RD->field_begin(), |
| 1908 | FieldEnd = RD->field_end(); |
David Blaikie | 262bc18 | 2012-04-30 02:36:29 +0000 | [diff] [blame] | 1909 | Field != FieldEnd; ++Field, ++i) { |
David Blaikie | 581deb3 | 2012-06-06 20:45:41 +0000 | [diff] [blame] | 1910 | if (*Field == MemberDecl) |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1911 | break; |
| 1912 | } |
| 1913 | assert(i < RL.getFieldCount() && "offsetof field in wrong type"); |
| 1914 | |
| 1915 | // Compute the offset to the field |
| 1916 | int64_t OffsetInt = RL.getFieldOffset(i) / |
| 1917 | CGF.getContext().getCharWidth(); |
| 1918 | Offset = llvm::ConstantInt::get(ResultType, OffsetInt); |
| 1919 | |
| 1920 | // Save the element type. |
| 1921 | CurrentType = MemberDecl->getType(); |
| 1922 | break; |
| 1923 | } |
Eli Friedman | 16fd39f | 2010-08-06 16:37:05 +0000 | [diff] [blame] | 1924 | |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1925 | case OffsetOfExpr::OffsetOfNode::Identifier: |
Eli Friedman | 6d4e44b | 2010-08-06 01:17:25 +0000 | [diff] [blame] | 1926 | llvm_unreachable("dependent __builtin_offsetof"); |
Eli Friedman | 16fd39f | 2010-08-06 16:37:05 +0000 | [diff] [blame] | 1927 | |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1928 | case OffsetOfExpr::OffsetOfNode::Base: { |
| 1929 | if (ON.getBase()->isVirtual()) { |
| 1930 | CGF.ErrorUnsupported(E, "virtual base in offsetof"); |
| 1931 | continue; |
| 1932 | } |
| 1933 | |
| 1934 | RecordDecl *RD = CurrentType->getAs<RecordType>()->getDecl(); |
| 1935 | const ASTRecordLayout &RL = CGF.getContext().getASTRecordLayout(RD); |
| 1936 | |
| 1937 | // Save the element type. |
| 1938 | CurrentType = ON.getBase()->getType(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 1939 | |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1940 | // Compute the offset to the base. |
| 1941 | const RecordType *BaseRT = CurrentType->getAs<RecordType>(); |
| 1942 | CXXRecordDecl *BaseRD = cast<CXXRecordDecl>(BaseRT->getDecl()); |
Benjamin Kramer | d4f5198 | 2012-07-04 18:45:14 +0000 | [diff] [blame] | 1943 | CharUnits OffsetInt = RL.getBaseClassOffset(BaseRD); |
| 1944 | Offset = llvm::ConstantInt::get(ResultType, OffsetInt.getQuantity()); |
Eli Friedman | 0027d2b | 2010-08-05 09:58:49 +0000 | [diff] [blame] | 1945 | break; |
| 1946 | } |
| 1947 | } |
| 1948 | Result = Builder.CreateAdd(Result, Offset); |
| 1949 | } |
| 1950 | return Result; |
Douglas Gregor | 8ecdb65 | 2010-04-28 22:16:22 +0000 | [diff] [blame] | 1951 | } |
| 1952 | |
Peter Collingbourne | f4e3cfb | 2011-03-11 19:24:49 +0000 | [diff] [blame] | 1953 | /// VisitUnaryExprOrTypeTraitExpr - Return the size or alignment of the type of |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 1954 | /// argument of the sizeof expression as an integer. |
| 1955 | Value * |
Peter Collingbourne | f4e3cfb | 2011-03-11 19:24:49 +0000 | [diff] [blame] | 1956 | ScalarExprEmitter::VisitUnaryExprOrTypeTraitExpr( |
| 1957 | const UnaryExprOrTypeTraitExpr *E) { |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 1958 | QualType TypeToSize = E->getTypeOfArgument(); |
Peter Collingbourne | f4e3cfb | 2011-03-11 19:24:49 +0000 | [diff] [blame] | 1959 | if (E->getKind() == UETT_SizeOf) { |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1960 | if (const VariableArrayType *VAT = |
Eli Friedman | f2da9df | 2009-01-24 22:19:05 +0000 | [diff] [blame] | 1961 | CGF.getContext().getAsVariableArrayType(TypeToSize)) { |
| 1962 | if (E->isArgumentType()) { |
| 1963 | // sizeof(type) - make sure to emit the VLA size. |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1964 | CGF.EmitVariablyModifiedType(TypeToSize); |
Eli Friedman | 8f426fa | 2009-04-20 03:21:44 +0000 | [diff] [blame] | 1965 | } else { |
| 1966 | // C99 6.5.3.4p2: If the argument is an expression of type |
| 1967 | // VLA, it is evaluated. |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 1968 | CGF.EmitIgnoredExpr(E->getArgumentExpr()); |
Eli Friedman | f2da9df | 2009-01-24 22:19:05 +0000 | [diff] [blame] | 1969 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1970 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1971 | QualType eltType; |
| 1972 | llvm::Value *numElts; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1973 | std::tie(numElts, eltType) = CGF.getVLASize(VAT); |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1974 | |
| 1975 | llvm::Value *size = numElts; |
| 1976 | |
| 1977 | // Scale the number of non-VLA elements by the non-VLA element size. |
| 1978 | CharUnits eltSize = CGF.getContext().getTypeSizeInChars(eltType); |
| 1979 | if (!eltSize.isOne()) |
| 1980 | size = CGF.Builder.CreateNUWMul(CGF.CGM.getSize(eltSize), numElts); |
| 1981 | |
| 1982 | return size; |
Anders Carlsson | b50525b | 2008-12-21 03:33:21 +0000 | [diff] [blame] | 1983 | } |
Anders Carlsson | 5d46315 | 2008-12-12 07:38:43 +0000 | [diff] [blame] | 1984 | } |
Eli Friedman | f2da9df | 2009-01-24 22:19:05 +0000 | [diff] [blame] | 1985 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1986 | // If this isn't sizeof(vla), the result must be constant; use the constant |
| 1987 | // folding logic so we don't have to duplicate it here. |
Richard Smith | 80d4b55 | 2011-12-28 19:48:30 +0000 | [diff] [blame] | 1988 | return Builder.getInt(E->EvaluateKnownConstInt(CGF.getContext())); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1989 | } |
| 1990 | |
Chris Lattner | 46f93d0 | 2007-08-24 21:20:17 +0000 | [diff] [blame] | 1991 | Value *ScalarExprEmitter::VisitUnaryReal(const UnaryOperator *E) { |
| 1992 | Expr *Op = E->getSubExpr(); |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 1993 | if (Op->getType()->isAnyComplexType()) { |
| 1994 | // If it's an l-value, load through the appropriate subobject l-value. |
| 1995 | // Note that we have to ask E because Op might be an l-value that |
| 1996 | // this won't work for, e.g. an Obj-C property. |
John McCall | 7eb0a9e | 2010-11-24 05:12:34 +0000 | [diff] [blame] | 1997 | if (E->isGLValue()) |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 1998 | return CGF.EmitLoadOfLValue(CGF.EmitLValue(E), |
| 1999 | E->getExprLoc()).getScalarVal(); |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2000 | |
| 2001 | // Otherwise, calculate and project. |
| 2002 | return CGF.EmitComplexExpr(Op, false, true).first; |
| 2003 | } |
| 2004 | |
Chris Lattner | 46f93d0 | 2007-08-24 21:20:17 +0000 | [diff] [blame] | 2005 | return Visit(Op); |
| 2006 | } |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2007 | |
Chris Lattner | 46f93d0 | 2007-08-24 21:20:17 +0000 | [diff] [blame] | 2008 | Value *ScalarExprEmitter::VisitUnaryImag(const UnaryOperator *E) { |
| 2009 | Expr *Op = E->getSubExpr(); |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2010 | if (Op->getType()->isAnyComplexType()) { |
| 2011 | // If it's an l-value, load through the appropriate subobject l-value. |
| 2012 | // Note that we have to ask E because Op might be an l-value that |
| 2013 | // this won't work for, e.g. an Obj-C property. |
John McCall | 7eb0a9e | 2010-11-24 05:12:34 +0000 | [diff] [blame] | 2014 | if (Op->isGLValue()) |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 2015 | return CGF.EmitLoadOfLValue(CGF.EmitLValue(E), |
| 2016 | E->getExprLoc()).getScalarVal(); |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2017 | |
| 2018 | // Otherwise, calculate and project. |
| 2019 | return CGF.EmitComplexExpr(Op, true, false).second; |
| 2020 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2021 | |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 2022 | // __imag on a scalar returns zero. Emit the subexpr to ensure side |
| 2023 | // effects are evaluated, but not the actual value. |
Richard Smith | dfb80de | 2012-02-18 20:53:32 +0000 | [diff] [blame] | 2024 | if (Op->isGLValue()) |
| 2025 | CGF.EmitLValue(Op); |
| 2026 | else |
| 2027 | CGF.EmitScalarExpr(Op, true); |
Owen Anderson | c9c88b4 | 2009-07-31 20:28:54 +0000 | [diff] [blame] | 2028 | return llvm::Constant::getNullValue(ConvertType(E->getType())); |
Chris Lattner | 46f93d0 | 2007-08-24 21:20:17 +0000 | [diff] [blame] | 2029 | } |
| 2030 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2031 | //===----------------------------------------------------------------------===// |
| 2032 | // Binary Operators |
| 2033 | //===----------------------------------------------------------------------===// |
| 2034 | |
| 2035 | BinOpInfo ScalarExprEmitter::EmitBinOps(const BinaryOperator *E) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 2036 | TestAndClearIgnoreResultAssign(); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2037 | BinOpInfo Result; |
| 2038 | Result.LHS = Visit(E->getLHS()); |
| 2039 | Result.RHS = Visit(E->getRHS()); |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 2040 | Result.Ty = E->getType(); |
Chris Lattner | 9a20723 | 2010-06-26 21:48:21 +0000 | [diff] [blame] | 2041 | Result.Opcode = E->getOpcode(); |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2042 | Result.FPContractable = E->isFPContractable(); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2043 | Result.E = E; |
| 2044 | return Result; |
| 2045 | } |
| 2046 | |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 2047 | LValue ScalarExprEmitter::EmitCompoundAssignLValue( |
| 2048 | const CompoundAssignOperator *E, |
| 2049 | Value *(ScalarExprEmitter::*Func)(const BinOpInfo &), |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2050 | Value *&Result) { |
Benjamin Kramer | 54d76db | 2009-12-25 15:43:36 +0000 | [diff] [blame] | 2051 | QualType LHSTy = E->getLHS()->getType(); |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 2052 | BinOpInfo OpInfo; |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2053 | |
Eli Friedman | 0934e18 | 2013-06-12 01:40:06 +0000 | [diff] [blame] | 2054 | if (E->getComputationResultType()->isAnyComplexType()) |
| 2055 | return CGF.EmitScalarCompooundAssignWithComplex(E, Result); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2056 | |
Mike Stump | cc0442f | 2009-05-22 19:07:20 +0000 | [diff] [blame] | 2057 | // Emit the RHS first. __block variables need to have the rhs evaluated |
| 2058 | // first, plus this should improve codegen a little. |
| 2059 | OpInfo.RHS = Visit(E->getRHS()); |
| 2060 | OpInfo.Ty = E->getComputationResultType(); |
Chris Lattner | 9a20723 | 2010-06-26 21:48:21 +0000 | [diff] [blame] | 2061 | OpInfo.Opcode = E->getOpcode(); |
Benjamin Kramer | ddc5733 | 2012-10-03 20:58:04 +0000 | [diff] [blame] | 2062 | OpInfo.FPContractable = false; |
Mike Stump | cc0442f | 2009-05-22 19:07:20 +0000 | [diff] [blame] | 2063 | OpInfo.E = E; |
Eli Friedman | ab3a852 | 2009-03-28 01:22:36 +0000 | [diff] [blame] | 2064 | // Load/convert the LHS. |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2065 | LValue LHSLV = EmitCheckedLValue(E->getLHS(), CodeGenFunction::TCK_Store); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 2066 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2067 | llvm::PHINode *atomicPHI = nullptr; |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 2068 | if (const AtomicType *atomicTy = LHSTy->getAs<AtomicType>()) { |
| 2069 | QualType type = atomicTy->getValueType(); |
| 2070 | if (!type->isBooleanType() && type->isIntegerType() && |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2071 | !(type->isUnsignedIntegerType() && |
| 2072 | CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) && |
| 2073 | CGF.getLangOpts().getSignedOverflowBehavior() != |
| 2074 | LangOptions::SOB_Trapping) { |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 2075 | llvm::AtomicRMWInst::BinOp aop = llvm::AtomicRMWInst::BAD_BINOP; |
| 2076 | switch (OpInfo.Opcode) { |
| 2077 | // We don't have atomicrmw operands for *, %, /, <<, >> |
| 2078 | case BO_MulAssign: case BO_DivAssign: |
| 2079 | case BO_RemAssign: |
| 2080 | case BO_ShlAssign: |
| 2081 | case BO_ShrAssign: |
| 2082 | break; |
| 2083 | case BO_AddAssign: |
| 2084 | aop = llvm::AtomicRMWInst::Add; |
| 2085 | break; |
| 2086 | case BO_SubAssign: |
| 2087 | aop = llvm::AtomicRMWInst::Sub; |
| 2088 | break; |
| 2089 | case BO_AndAssign: |
| 2090 | aop = llvm::AtomicRMWInst::And; |
| 2091 | break; |
| 2092 | case BO_XorAssign: |
| 2093 | aop = llvm::AtomicRMWInst::Xor; |
| 2094 | break; |
| 2095 | case BO_OrAssign: |
| 2096 | aop = llvm::AtomicRMWInst::Or; |
| 2097 | break; |
| 2098 | default: |
| 2099 | llvm_unreachable("Invalid compound assignment type"); |
| 2100 | } |
| 2101 | if (aop != llvm::AtomicRMWInst::BAD_BINOP) { |
| 2102 | llvm::Value *amt = CGF.EmitToMemory(EmitScalarConversion(OpInfo.RHS, |
| 2103 | E->getRHS()->getType(), LHSTy), LHSTy); |
| 2104 | Builder.CreateAtomicRMW(aop, LHSLV.getAddress(), amt, |
| 2105 | llvm::SequentiallyConsistent); |
| 2106 | return LHSLV; |
| 2107 | } |
| 2108 | } |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 2109 | // FIXME: For floating point types, we should be saving and restoring the |
| 2110 | // floating point environment in the loop. |
| 2111 | llvm::BasicBlock *startBB = Builder.GetInsertBlock(); |
| 2112 | llvm::BasicBlock *opBB = CGF.createBasicBlock("atomic_op", CGF.CurFn); |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 2113 | OpInfo.LHS = EmitLoadOfLValue(LHSLV, E->getExprLoc()); |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 2114 | OpInfo.LHS = CGF.EmitToMemory(OpInfo.LHS, type); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 2115 | Builder.CreateBr(opBB); |
| 2116 | Builder.SetInsertPoint(opBB); |
| 2117 | atomicPHI = Builder.CreatePHI(OpInfo.LHS->getType(), 2); |
| 2118 | atomicPHI->addIncoming(OpInfo.LHS, startBB); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 2119 | OpInfo.LHS = atomicPHI; |
| 2120 | } |
David Chisnall | 72c1dba | 2013-03-03 16:02:42 +0000 | [diff] [blame] | 2121 | else |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 2122 | OpInfo.LHS = EmitLoadOfLValue(LHSLV, E->getExprLoc()); |
Eli Friedman | 860a319 | 2012-06-16 02:19:17 +0000 | [diff] [blame] | 2123 | |
| 2124 | OpInfo.LHS = EmitScalarConversion(OpInfo.LHS, LHSTy, |
| 2125 | E->getComputationLHSType()); |
| 2126 | |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 2127 | // Expand the binary operator. |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2128 | Result = (this->*Func)(OpInfo); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2129 | |
Daniel Dunbar | 8c6f57c | 2008-08-06 02:00:38 +0000 | [diff] [blame] | 2130 | // Convert the result back to the LHS type. |
Eli Friedman | ab3a852 | 2009-03-28 01:22:36 +0000 | [diff] [blame] | 2131 | Result = EmitScalarConversion(Result, E->getComputationResultType(), LHSTy); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 2132 | |
| 2133 | if (atomicPHI) { |
| 2134 | llvm::BasicBlock *opBB = Builder.GetInsertBlock(); |
| 2135 | llvm::BasicBlock *contBB = CGF.createBasicBlock("atomic_cont", CGF.CurFn); |
Stephen Hines | c568f1e | 2014-07-21 00:47:37 -0700 | [diff] [blame] | 2136 | llvm::Value *pair = Builder.CreateAtomicCmpXchg( |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2137 | LHSLV.getAddress(), atomicPHI, CGF.EmitToMemory(Result, LHSTy), |
| 2138 | llvm::SequentiallyConsistent, llvm::SequentiallyConsistent); |
Stephen Hines | c568f1e | 2014-07-21 00:47:37 -0700 | [diff] [blame] | 2139 | llvm::Value *old = Builder.CreateExtractValue(pair, 0); |
| 2140 | llvm::Value *success = Builder.CreateExtractValue(pair, 1); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 2141 | atomicPHI->addIncoming(old, opBB); |
David Chisnall | 7a7ee30 | 2012-01-16 17:27:18 +0000 | [diff] [blame] | 2142 | Builder.CreateCondBr(success, contBB, opBB); |
| 2143 | Builder.SetInsertPoint(contBB); |
| 2144 | return LHSLV; |
| 2145 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2146 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2147 | // Store the result value into the LHS lvalue. Bit-fields are handled |
| 2148 | // specially because the result is altered by the store, i.e., [C99 6.5.16p1] |
| 2149 | // 'An assignment expression has the value of the left operand after the |
| 2150 | // assignment...'. |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2151 | if (LHSLV.isBitField()) |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 2152 | CGF.EmitStoreThroughBitfieldLValue(RValue::get(Result), LHSLV, &Result); |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2153 | else |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 2154 | CGF.EmitStoreThroughLValue(RValue::get(Result), LHSLV); |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2155 | |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 2156 | return LHSLV; |
| 2157 | } |
| 2158 | |
| 2159 | Value *ScalarExprEmitter::EmitCompoundAssign(const CompoundAssignOperator *E, |
| 2160 | Value *(ScalarExprEmitter::*Func)(const BinOpInfo &)) { |
| 2161 | bool Ignore = TestAndClearIgnoreResultAssign(); |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2162 | Value *RHS; |
| 2163 | LValue LHS = EmitCompoundAssignLValue(E, Func, RHS); |
| 2164 | |
| 2165 | // If the result is clearly ignored, return now. |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 2166 | if (Ignore) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2167 | return nullptr; |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2168 | |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2169 | // The result of an assignment in C is the assigned r-value. |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 2170 | if (!CGF.getLangOpts().CPlusPlus) |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2171 | return RHS; |
| 2172 | |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2173 | // If the lvalue is non-volatile, return the computed value of the assignment. |
| 2174 | if (!LHS.isVolatileQualified()) |
| 2175 | return RHS; |
| 2176 | |
| 2177 | // Otherwise, reload the value. |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 2178 | return EmitLoadOfLValue(LHS, E->getExprLoc()); |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 2179 | } |
| 2180 | |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2181 | void ScalarExprEmitter::EmitUndefinedBehaviorIntegerDivAndRemCheck( |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2182 | const BinOpInfo &Ops, llvm::Value *Zero, bool isDiv) { |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2183 | SmallVector<std::pair<llvm::Value *, SanitizerKind>, 2> Checks; |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2184 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2185 | if (CGF.SanOpts.has(SanitizerKind::IntegerDivideByZero)) { |
| 2186 | Checks.push_back(std::make_pair(Builder.CreateICmpNE(Ops.RHS, Zero), |
| 2187 | SanitizerKind::IntegerDivideByZero)); |
| 2188 | } |
Richard Smith | c54e25f | 2012-11-06 02:30:30 +0000 | [diff] [blame] | 2189 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2190 | if (CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow) && |
Richard Smith | c54e25f | 2012-11-06 02:30:30 +0000 | [diff] [blame] | 2191 | Ops.Ty->hasSignedIntegerRepresentation()) { |
| 2192 | llvm::IntegerType *Ty = cast<llvm::IntegerType>(Zero->getType()); |
| 2193 | |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2194 | llvm::Value *IntMin = |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 2195 | Builder.getInt(llvm::APInt::getSignedMinValue(Ty->getBitWidth())); |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2196 | llvm::Value *NegOne = llvm::ConstantInt::get(Ty, -1ULL); |
| 2197 | |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2198 | llvm::Value *LHSCmp = Builder.CreateICmpNE(Ops.LHS, IntMin); |
| 2199 | llvm::Value *RHSCmp = Builder.CreateICmpNE(Ops.RHS, NegOne); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2200 | llvm::Value *NotOverflow = Builder.CreateOr(LHSCmp, RHSCmp, "or"); |
| 2201 | Checks.push_back( |
| 2202 | std::make_pair(NotOverflow, SanitizerKind::SignedIntegerOverflow)); |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2203 | } |
Richard Smith | c54e25f | 2012-11-06 02:30:30 +0000 | [diff] [blame] | 2204 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2205 | if (Checks.size() > 0) |
| 2206 | EmitBinOpCheck(Checks, Ops); |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2207 | } |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 2208 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2209 | Value *ScalarExprEmitter::EmitDiv(const BinOpInfo &Ops) { |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2210 | { |
| 2211 | CodeGenFunction::SanitizerScope SanScope(&CGF); |
| 2212 | if ((CGF.SanOpts.has(SanitizerKind::IntegerDivideByZero) || |
| 2213 | CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) && |
| 2214 | Ops.Ty->isIntegerType()) { |
| 2215 | llvm::Value *Zero = llvm::Constant::getNullValue(ConvertType(Ops.Ty)); |
| 2216 | EmitUndefinedBehaviorIntegerDivAndRemCheck(Ops, Zero, true); |
| 2217 | } else if (CGF.SanOpts.has(SanitizerKind::FloatDivideByZero) && |
| 2218 | Ops.Ty->isRealFloatingType()) { |
| 2219 | llvm::Value *Zero = llvm::Constant::getNullValue(ConvertType(Ops.Ty)); |
| 2220 | llvm::Value *NonZero = Builder.CreateFCmpUNE(Ops.RHS, Zero); |
| 2221 | EmitBinOpCheck(std::make_pair(NonZero, SanitizerKind::FloatDivideByZero), |
| 2222 | Ops); |
| 2223 | } |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2224 | } |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2225 | |
Peter Collingbourne | c5096cb | 2011-10-27 19:19:51 +0000 | [diff] [blame] | 2226 | if (Ops.LHS->getType()->isFPOrFPVectorTy()) { |
| 2227 | llvm::Value *Val = Builder.CreateFDiv(Ops.LHS, Ops.RHS, "div"); |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 2228 | if (CGF.getLangOpts().OpenCL) { |
Peter Collingbourne | c5096cb | 2011-10-27 19:19:51 +0000 | [diff] [blame] | 2229 | // OpenCL 1.1 7.4: minimum accuracy of single precision / is 2.5ulp |
| 2230 | llvm::Type *ValTy = Val->getType(); |
| 2231 | if (ValTy->isFloatTy() || |
| 2232 | (isa<llvm::VectorType>(ValTy) && |
| 2233 | cast<llvm::VectorType>(ValTy)->getElementType()->isFloatTy())) |
Duncan Sands | 8250016 | 2012-04-10 08:23:07 +0000 | [diff] [blame] | 2234 | CGF.SetFPAccuracy(Val, 2.5); |
Peter Collingbourne | c5096cb | 2011-10-27 19:19:51 +0000 | [diff] [blame] | 2235 | } |
| 2236 | return Val; |
| 2237 | } |
Douglas Gregor | f609462 | 2010-07-23 15:58:24 +0000 | [diff] [blame] | 2238 | else if (Ops.Ty->hasUnsignedIntegerRepresentation()) |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2239 | return Builder.CreateUDiv(Ops.LHS, Ops.RHS, "div"); |
| 2240 | else |
| 2241 | return Builder.CreateSDiv(Ops.LHS, Ops.RHS, "div"); |
| 2242 | } |
| 2243 | |
| 2244 | Value *ScalarExprEmitter::EmitRem(const BinOpInfo &Ops) { |
| 2245 | // 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] | 2246 | if (CGF.SanOpts.has(SanitizerKind::IntegerDivideByZero)) { |
| 2247 | CodeGenFunction::SanitizerScope SanScope(&CGF); |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2248 | llvm::Value *Zero = llvm::Constant::getNullValue(ConvertType(Ops.Ty)); |
| 2249 | |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2250 | if (Ops.Ty->isIntegerType()) |
Chris Lattner | 8023030 | 2010-09-11 21:47:09 +0000 | [diff] [blame] | 2251 | EmitUndefinedBehaviorIntegerDivAndRemCheck(Ops, Zero, false); |
| 2252 | } |
| 2253 | |
Eli Friedman | 52d6874 | 2011-04-10 04:44:11 +0000 | [diff] [blame] | 2254 | if (Ops.Ty->hasUnsignedIntegerRepresentation()) |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2255 | return Builder.CreateURem(Ops.LHS, Ops.RHS, "rem"); |
| 2256 | else |
| 2257 | return Builder.CreateSRem(Ops.LHS, Ops.RHS, "rem"); |
| 2258 | } |
| 2259 | |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2260 | Value *ScalarExprEmitter::EmitOverflowCheckedBinOp(const BinOpInfo &Ops) { |
| 2261 | unsigned IID; |
| 2262 | unsigned OpID = 0; |
Mike Stump | 5d8b2cf | 2009-04-02 01:03:55 +0000 | [diff] [blame] | 2263 | |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2264 | bool isSigned = Ops.Ty->isSignedIntegerOrEnumerationType(); |
Chris Lattner | 9a20723 | 2010-06-26 21:48:21 +0000 | [diff] [blame] | 2265 | switch (Ops.Opcode) { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2266 | case BO_Add: |
| 2267 | case BO_AddAssign: |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2268 | OpID = 1; |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2269 | IID = isSigned ? llvm::Intrinsic::sadd_with_overflow : |
| 2270 | llvm::Intrinsic::uadd_with_overflow; |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2271 | break; |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2272 | case BO_Sub: |
| 2273 | case BO_SubAssign: |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2274 | OpID = 2; |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2275 | IID = isSigned ? llvm::Intrinsic::ssub_with_overflow : |
| 2276 | llvm::Intrinsic::usub_with_overflow; |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2277 | break; |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2278 | case BO_Mul: |
| 2279 | case BO_MulAssign: |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2280 | OpID = 3; |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2281 | IID = isSigned ? llvm::Intrinsic::smul_with_overflow : |
| 2282 | llvm::Intrinsic::umul_with_overflow; |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2283 | break; |
| 2284 | default: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 2285 | llvm_unreachable("Unsupported operation for overflow detection"); |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2286 | } |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2287 | OpID <<= 1; |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2288 | if (isSigned) |
| 2289 | OpID |= 1; |
Mike Stump | 035cf89 | 2009-04-02 18:15:54 +0000 | [diff] [blame] | 2290 | |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 2291 | llvm::Type *opTy = CGF.CGM.getTypes().ConvertType(Ops.Ty); |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2292 | |
Benjamin Kramer | 8dd55a3 | 2011-07-14 17:45:50 +0000 | [diff] [blame] | 2293 | llvm::Function *intrinsic = CGF.CGM.getIntrinsic(IID, opTy); |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2294 | |
| 2295 | Value *resultAndOverflow = Builder.CreateCall2(intrinsic, Ops.LHS, Ops.RHS); |
| 2296 | Value *result = Builder.CreateExtractValue(resultAndOverflow, 0); |
| 2297 | Value *overflow = Builder.CreateExtractValue(resultAndOverflow, 1); |
| 2298 | |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2299 | // Handle overflow with llvm.trap if no custom handler has been specified. |
| 2300 | const std::string *handlerName = |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 2301 | &CGF.getLangOpts().OverflowHandler; |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2302 | if (handlerName->empty()) { |
Richard Smith | d6396a6 | 2012-11-05 22:21:05 +0000 | [diff] [blame] | 2303 | // 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] | 2304 | // runtime. Otherwise, this is a -ftrapv check, so just emit a trap. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2305 | if (!isSigned || CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) { |
| 2306 | CodeGenFunction::SanitizerScope SanScope(&CGF); |
| 2307 | llvm::Value *NotOverflow = Builder.CreateNot(overflow); |
| 2308 | SanitizerKind Kind = isSigned ? SanitizerKind::SignedIntegerOverflow |
| 2309 | : SanitizerKind::UnsignedIntegerOverflow; |
| 2310 | EmitBinOpCheck(std::make_pair(NotOverflow, Kind), Ops); |
| 2311 | } else |
Chad Rosier | 78d85b1 | 2013-01-29 23:31:22 +0000 | [diff] [blame] | 2312 | CGF.EmitTrapCheck(Builder.CreateNot(overflow)); |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2313 | return result; |
| 2314 | } |
| 2315 | |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2316 | // Branch in case of overflow. |
David Chisnall | 7f18e67 | 2010-09-17 18:29:54 +0000 | [diff] [blame] | 2317 | llvm::BasicBlock *initialBB = Builder.GetInsertBlock(); |
Bill Wendling | 14ef319 | 2011-07-07 21:13:10 +0000 | [diff] [blame] | 2318 | llvm::Function::iterator insertPt = initialBB; |
| 2319 | llvm::BasicBlock *continueBB = CGF.createBasicBlock("nooverflow", CGF.CurFn, |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2320 | std::next(insertPt)); |
Chris Lattner | 93a0035 | 2010-08-07 00:20:46 +0000 | [diff] [blame] | 2321 | llvm::BasicBlock *overflowBB = CGF.createBasicBlock("overflow", CGF.CurFn); |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2322 | |
| 2323 | Builder.CreateCondBr(overflow, overflowBB, continueBB); |
| 2324 | |
David Chisnall | 7f18e67 | 2010-09-17 18:29:54 +0000 | [diff] [blame] | 2325 | // If an overflow handler is set, then we want to call it and then use its |
| 2326 | // result, if it returns. |
| 2327 | Builder.SetInsertPoint(overflowBB); |
| 2328 | |
| 2329 | // Get the overflow handler. |
Chris Lattner | 8b41868 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 2330 | llvm::Type *Int8Ty = CGF.Int8Ty; |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 2331 | llvm::Type *argTypes[] = { CGF.Int64Ty, CGF.Int64Ty, Int8Ty, Int8Ty }; |
David Chisnall | 7f18e67 | 2010-09-17 18:29:54 +0000 | [diff] [blame] | 2332 | llvm::FunctionType *handlerTy = |
| 2333 | llvm::FunctionType::get(CGF.Int64Ty, argTypes, true); |
| 2334 | llvm::Value *handler = CGF.CGM.CreateRuntimeFunction(handlerTy, *handlerName); |
| 2335 | |
| 2336 | // Sign extend the args to 64-bit, so that we can use the same handler for |
| 2337 | // all types of overflow. |
| 2338 | llvm::Value *lhs = Builder.CreateSExt(Ops.LHS, CGF.Int64Ty); |
| 2339 | llvm::Value *rhs = Builder.CreateSExt(Ops.RHS, CGF.Int64Ty); |
| 2340 | |
| 2341 | // Call the handler with the two arguments, the operation, and the size of |
| 2342 | // the result. |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2343 | llvm::Value *handlerArgs[] = { |
| 2344 | lhs, |
| 2345 | rhs, |
| 2346 | Builder.getInt8(OpID), |
| 2347 | Builder.getInt8(cast<llvm::IntegerType>(opTy)->getBitWidth()) |
| 2348 | }; |
| 2349 | llvm::Value *handlerResult = |
| 2350 | CGF.EmitNounwindRuntimeCall(handler, handlerArgs); |
David Chisnall | 7f18e67 | 2010-09-17 18:29:54 +0000 | [diff] [blame] | 2351 | |
| 2352 | // Truncate the result back to the desired size. |
| 2353 | handlerResult = Builder.CreateTrunc(handlerResult, opTy); |
| 2354 | Builder.CreateBr(continueBB); |
| 2355 | |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2356 | Builder.SetInsertPoint(continueBB); |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 2357 | llvm::PHINode *phi = Builder.CreatePHI(opTy, 2); |
David Chisnall | 7f18e67 | 2010-09-17 18:29:54 +0000 | [diff] [blame] | 2358 | phi->addIncoming(result, initialBB); |
| 2359 | phi->addIncoming(handlerResult, overflowBB); |
| 2360 | |
| 2361 | return phi; |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2362 | } |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2363 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2364 | /// Emit pointer + index arithmetic. |
| 2365 | static Value *emitPointerArithmetic(CodeGenFunction &CGF, |
| 2366 | const BinOpInfo &op, |
| 2367 | bool isSubtraction) { |
| 2368 | // Must have binary (not unary) expr here. Unary pointer |
| 2369 | // increment/decrement doesn't use this path. |
| 2370 | const BinaryOperator *expr = cast<BinaryOperator>(op.E); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2371 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2372 | Value *pointer = op.LHS; |
| 2373 | Expr *pointerOperand = expr->getLHS(); |
| 2374 | Value *index = op.RHS; |
| 2375 | Expr *indexOperand = expr->getRHS(); |
| 2376 | |
| 2377 | // In a subtraction, the LHS is always the pointer. |
| 2378 | if (!isSubtraction && !pointer->getType()->isPointerTy()) { |
| 2379 | std::swap(pointer, index); |
| 2380 | std::swap(pointerOperand, indexOperand); |
| 2381 | } |
| 2382 | |
| 2383 | unsigned width = cast<llvm::IntegerType>(index->getType())->getBitWidth(); |
| 2384 | if (width != CGF.PointerWidthInBits) { |
| 2385 | // Zero-extend or sign-extend the pointer value according to |
| 2386 | // whether the index is signed or not. |
| 2387 | bool isSigned = indexOperand->getType()->isSignedIntegerOrEnumerationType(); |
| 2388 | index = CGF.Builder.CreateIntCast(index, CGF.PtrDiffTy, isSigned, |
| 2389 | "idx.ext"); |
| 2390 | } |
| 2391 | |
| 2392 | // If this is subtraction, negate the index. |
| 2393 | if (isSubtraction) |
| 2394 | index = CGF.Builder.CreateNeg(index, "idx.neg"); |
| 2395 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2396 | if (CGF.SanOpts.has(SanitizerKind::ArrayBounds)) |
Richard Smith | a0a628f | 2013-02-23 02:53:19 +0000 | [diff] [blame] | 2397 | CGF.EmitBoundsCheck(op.E, pointerOperand, index, indexOperand->getType(), |
| 2398 | /*Accessed*/ false); |
| 2399 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2400 | const PointerType *pointerType |
| 2401 | = pointerOperand->getType()->getAs<PointerType>(); |
| 2402 | if (!pointerType) { |
| 2403 | QualType objectType = pointerOperand->getType() |
| 2404 | ->castAs<ObjCObjectPointerType>() |
| 2405 | ->getPointeeType(); |
| 2406 | llvm::Value *objectSize |
| 2407 | = CGF.CGM.getSize(CGF.getContext().getTypeSizeInChars(objectType)); |
| 2408 | |
| 2409 | index = CGF.Builder.CreateMul(index, objectSize); |
| 2410 | |
| 2411 | Value *result = CGF.Builder.CreateBitCast(pointer, CGF.VoidPtrTy); |
| 2412 | result = CGF.Builder.CreateGEP(result, index, "add.ptr"); |
| 2413 | return CGF.Builder.CreateBitCast(result, pointer->getType()); |
| 2414 | } |
| 2415 | |
| 2416 | QualType elementType = pointerType->getPointeeType(); |
| 2417 | if (const VariableArrayType *vla |
| 2418 | = CGF.getContext().getAsVariableArrayType(elementType)) { |
| 2419 | // The element count here is the total number of non-VLA elements. |
| 2420 | llvm::Value *numElements = CGF.getVLASize(vla).first; |
| 2421 | |
| 2422 | // Effectively, the multiply by the VLA size is part of the GEP. |
| 2423 | // GEP indexes are signed, and scaling an index isn't permitted to |
| 2424 | // signed-overflow, so we use the same semantics for our explicit |
| 2425 | // multiply. We suppress this if overflow is not undefined behavior. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2426 | if (CGF.getLangOpts().isSignedOverflowDefined()) { |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2427 | index = CGF.Builder.CreateMul(index, numElements, "vla.index"); |
| 2428 | pointer = CGF.Builder.CreateGEP(pointer, index, "add.ptr"); |
| 2429 | } else { |
| 2430 | index = CGF.Builder.CreateNSWMul(index, numElements, "vla.index"); |
| 2431 | pointer = CGF.Builder.CreateInBoundsGEP(pointer, index, "add.ptr"); |
Chris Lattner | a4d7145 | 2010-06-26 21:25:03 +0000 | [diff] [blame] | 2432 | } |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2433 | return pointer; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2434 | } |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 2435 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2436 | // Explicitly handle GNU void* and function pointer arithmetic extensions. The |
| 2437 | // GNU void* casts amount to no-ops since our void* type is i8*, but this is |
| 2438 | // future proof. |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2439 | if (elementType->isVoidType() || elementType->isFunctionType()) { |
| 2440 | Value *result = CGF.Builder.CreateBitCast(pointer, CGF.VoidPtrTy); |
| 2441 | result = CGF.Builder.CreateGEP(result, index, "add.ptr"); |
| 2442 | return CGF.Builder.CreateBitCast(result, pointer->getType()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2443 | } |
| 2444 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2445 | if (CGF.getLangOpts().isSignedOverflowDefined()) |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2446 | return CGF.Builder.CreateGEP(pointer, index, "add.ptr"); |
| 2447 | |
| 2448 | return CGF.Builder.CreateInBoundsGEP(pointer, index, "add.ptr"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2449 | } |
| 2450 | |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2451 | // Construct an fmuladd intrinsic to represent a fused mul-add of MulOp and |
| 2452 | // Addend. Use negMul and negAdd to negate the first operand of the Mul or |
| 2453 | // the add operand respectively. This allows fmuladd to represent a*b-c, or |
| 2454 | // c-a*b. Patterns in LLVM should catch the negated forms and translate them to |
| 2455 | // efficient operations. |
| 2456 | static Value* buildFMulAdd(llvm::BinaryOperator *MulOp, Value *Addend, |
| 2457 | const CodeGenFunction &CGF, CGBuilderTy &Builder, |
| 2458 | bool negMul, bool negAdd) { |
| 2459 | assert(!(negMul && negAdd) && "Only one of negMul and negAdd should be set."); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2460 | |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2461 | Value *MulOp0 = MulOp->getOperand(0); |
| 2462 | Value *MulOp1 = MulOp->getOperand(1); |
| 2463 | if (negMul) { |
| 2464 | MulOp0 = |
| 2465 | Builder.CreateFSub( |
| 2466 | llvm::ConstantFP::getZeroValueForNegation(MulOp0->getType()), MulOp0, |
| 2467 | "neg"); |
| 2468 | } else if (negAdd) { |
| 2469 | Addend = |
| 2470 | Builder.CreateFSub( |
| 2471 | llvm::ConstantFP::getZeroValueForNegation(Addend->getType()), Addend, |
| 2472 | "neg"); |
| 2473 | } |
| 2474 | |
| 2475 | Value *FMulAdd = |
| 2476 | Builder.CreateCall3( |
| 2477 | CGF.CGM.getIntrinsic(llvm::Intrinsic::fmuladd, Addend->getType()), |
| 2478 | MulOp0, MulOp1, Addend); |
| 2479 | MulOp->eraseFromParent(); |
| 2480 | |
| 2481 | return FMulAdd; |
| 2482 | } |
| 2483 | |
| 2484 | // Check whether it would be legal to emit an fmuladd intrinsic call to |
| 2485 | // represent op and if so, build the fmuladd. |
| 2486 | // |
| 2487 | // Checks that (a) the operation is fusable, and (b) -ffp-contract=on. |
| 2488 | // Does NOT check the type of the operation - it's assumed that this function |
| 2489 | // 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] | 2490 | static Value* tryEmitFMulAdd(const BinOpInfo &op, |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2491 | const CodeGenFunction &CGF, CGBuilderTy &Builder, |
| 2492 | bool isSub=false) { |
| 2493 | |
| 2494 | assert((op.Opcode == BO_Add || op.Opcode == BO_AddAssign || |
| 2495 | op.Opcode == BO_Sub || op.Opcode == BO_SubAssign) && |
| 2496 | "Only fadd/fsub can be the root of an fmuladd."); |
| 2497 | |
| 2498 | // Check whether this op is marked as fusable. |
| 2499 | if (!op.FPContractable) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2500 | return nullptr; |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2501 | |
| 2502 | // Check whether -ffp-contract=on. (If -ffp-contract=off/fast, fusing is |
| 2503 | // either disabled, or handled entirely by the LLVM backend). |
Lang Hames | 931c083 | 2012-11-15 07:51:26 +0000 | [diff] [blame] | 2504 | if (CGF.CGM.getCodeGenOpts().getFPContractMode() != CodeGenOptions::FPC_On) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2505 | return nullptr; |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2506 | |
| 2507 | // We have a potentially fusable op. Look for a mul on one of the operands. |
| 2508 | if (llvm::BinaryOperator* LHSBinOp = dyn_cast<llvm::BinaryOperator>(op.LHS)) { |
| 2509 | if (LHSBinOp->getOpcode() == llvm::Instruction::FMul) { |
Lang Hames | ff4ae6d | 2012-10-04 03:23:25 +0000 | [diff] [blame] | 2510 | assert(LHSBinOp->getNumUses() == 0 && |
| 2511 | "Operations with multiple uses shouldn't be contracted."); |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2512 | return buildFMulAdd(LHSBinOp, op.RHS, CGF, Builder, false, isSub); |
| 2513 | } |
| 2514 | } else if (llvm::BinaryOperator* RHSBinOp = |
| 2515 | dyn_cast<llvm::BinaryOperator>(op.RHS)) { |
| 2516 | if (RHSBinOp->getOpcode() == llvm::Instruction::FMul) { |
Lang Hames | ff4ae6d | 2012-10-04 03:23:25 +0000 | [diff] [blame] | 2517 | assert(RHSBinOp->getNumUses() == 0 && |
| 2518 | "Operations with multiple uses shouldn't be contracted."); |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2519 | return buildFMulAdd(RHSBinOp, op.LHS, CGF, Builder, isSub, false); |
| 2520 | } |
| 2521 | } |
| 2522 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2523 | return nullptr; |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2524 | } |
| 2525 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2526 | Value *ScalarExprEmitter::EmitAdd(const BinOpInfo &op) { |
| 2527 | if (op.LHS->getType()->isPointerTy() || |
| 2528 | op.RHS->getType()->isPointerTy()) |
| 2529 | return emitPointerArithmetic(CGF, op, /*subtraction*/ false); |
| 2530 | |
| 2531 | if (op.Ty->isSignedIntegerOrEnumerationType()) { |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 2532 | switch (CGF.getLangOpts().getSignedOverflowBehavior()) { |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2533 | case LangOptions::SOB_Defined: |
| 2534 | return Builder.CreateAdd(op.LHS, op.RHS, "add"); |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2535 | case LangOptions::SOB_Undefined: |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2536 | if (!CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2537 | return Builder.CreateNSWAdd(op.LHS, op.RHS, "add"); |
| 2538 | // Fall through. |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2539 | case LangOptions::SOB_Trapping: |
| 2540 | return EmitOverflowCheckedBinOp(op); |
| 2541 | } |
| 2542 | } |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2543 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2544 | if (op.Ty->isUnsignedIntegerType() && |
| 2545 | CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2546 | return EmitOverflowCheckedBinOp(op); |
| 2547 | |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2548 | if (op.LHS->getType()->isFPOrFPVectorTy()) { |
| 2549 | // Try to form an fmuladd. |
| 2550 | if (Value *FMulAdd = tryEmitFMulAdd(op, CGF, Builder)) |
| 2551 | return FMulAdd; |
| 2552 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2553 | return Builder.CreateFAdd(op.LHS, op.RHS, "add"); |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2554 | } |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2555 | |
| 2556 | return Builder.CreateAdd(op.LHS, op.RHS, "add"); |
| 2557 | } |
| 2558 | |
| 2559 | Value *ScalarExprEmitter::EmitSub(const BinOpInfo &op) { |
| 2560 | // The LHS is always a pointer if either side is. |
| 2561 | if (!op.LHS->getType()->isPointerTy()) { |
| 2562 | if (op.Ty->isSignedIntegerOrEnumerationType()) { |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 2563 | switch (CGF.getLangOpts().getSignedOverflowBehavior()) { |
Chris Lattner | a4d7145 | 2010-06-26 21:25:03 +0000 | [diff] [blame] | 2564 | case LangOptions::SOB_Defined: |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2565 | return Builder.CreateSub(op.LHS, op.RHS, "sub"); |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2566 | case LangOptions::SOB_Undefined: |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2567 | if (!CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2568 | return Builder.CreateNSWSub(op.LHS, op.RHS, "sub"); |
| 2569 | // Fall through. |
Chris Lattner | a4d7145 | 2010-06-26 21:25:03 +0000 | [diff] [blame] | 2570 | case LangOptions::SOB_Trapping: |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2571 | return EmitOverflowCheckedBinOp(op); |
Chris Lattner | a4d7145 | 2010-06-26 21:25:03 +0000 | [diff] [blame] | 2572 | } |
| 2573 | } |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2574 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2575 | if (op.Ty->isUnsignedIntegerType() && |
| 2576 | CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) |
Will Dietz | b854036 | 2012-11-27 15:01:55 +0000 | [diff] [blame] | 2577 | return EmitOverflowCheckedBinOp(op); |
| 2578 | |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2579 | if (op.LHS->getType()->isFPOrFPVectorTy()) { |
| 2580 | // Try to form an fmuladd. |
| 2581 | if (Value *FMulAdd = tryEmitFMulAdd(op, CGF, Builder, true)) |
| 2582 | return FMulAdd; |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2583 | return Builder.CreateFSub(op.LHS, op.RHS, "sub"); |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2584 | } |
Chris Lattner | 2eb91e4 | 2010-03-29 17:28:16 +0000 | [diff] [blame] | 2585 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2586 | return Builder.CreateSub(op.LHS, op.RHS, "sub"); |
Mike Stump | 2add473 | 2009-04-01 20:28:16 +0000 | [diff] [blame] | 2587 | } |
Chris Lattner | 1f1ded9 | 2007-08-24 21:00:35 +0000 | [diff] [blame] | 2588 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2589 | // If the RHS is not a pointer, then we have normal pointer |
| 2590 | // arithmetic. |
| 2591 | if (!op.RHS->getType()->isPointerTy()) |
| 2592 | return emitPointerArithmetic(CGF, op, /*subtraction*/ true); |
Eli Friedman | daa24a2 | 2009-03-28 02:45:41 +0000 | [diff] [blame] | 2593 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2594 | // Otherwise, this is a pointer subtraction. |
Daniel Dunbar | b09fae7 | 2009-01-23 18:51:09 +0000 | [diff] [blame] | 2595 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2596 | // Do the raw subtraction part. |
| 2597 | llvm::Value *LHS |
| 2598 | = Builder.CreatePtrToInt(op.LHS, CGF.PtrDiffTy, "sub.ptr.lhs.cast"); |
| 2599 | llvm::Value *RHS |
| 2600 | = Builder.CreatePtrToInt(op.RHS, CGF.PtrDiffTy, "sub.ptr.rhs.cast"); |
| 2601 | Value *diffInChars = Builder.CreateSub(LHS, RHS, "sub.ptr.sub"); |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 2602 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2603 | // Okay, figure out the element size. |
| 2604 | const BinaryOperator *expr = cast<BinaryOperator>(op.E); |
| 2605 | QualType elementType = expr->getLHS()->getType()->getPointeeType(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2606 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2607 | llvm::Value *divisor = nullptr; |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2608 | |
| 2609 | // For a variable-length array, this is going to be non-constant. |
| 2610 | if (const VariableArrayType *vla |
| 2611 | = CGF.getContext().getAsVariableArrayType(elementType)) { |
| 2612 | llvm::Value *numElements; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2613 | std::tie(numElements, elementType) = CGF.getVLASize(vla); |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2614 | |
| 2615 | divisor = numElements; |
| 2616 | |
| 2617 | // Scale the number of non-VLA elements by the non-VLA element size. |
| 2618 | CharUnits eltSize = CGF.getContext().getTypeSizeInChars(elementType); |
| 2619 | if (!eltSize.isOne()) |
| 2620 | divisor = CGF.Builder.CreateNUWMul(CGF.CGM.getSize(eltSize), divisor); |
| 2621 | |
| 2622 | // For everything elese, we can just compute it, safe in the |
| 2623 | // assumption that Sema won't let anything through that we can't |
| 2624 | // safely compute the size of. |
| 2625 | } else { |
| 2626 | CharUnits elementSize; |
| 2627 | // Handle GCC extension for pointer arithmetic on void* and |
| 2628 | // function pointer types. |
| 2629 | if (elementType->isVoidType() || elementType->isFunctionType()) |
| 2630 | elementSize = CharUnits::One(); |
| 2631 | else |
| 2632 | elementSize = CGF.getContext().getTypeSizeInChars(elementType); |
| 2633 | |
| 2634 | // Don't even emit the divide for element size of 1. |
| 2635 | if (elementSize.isOne()) |
| 2636 | return diffInChars; |
| 2637 | |
| 2638 | divisor = CGF.CGM.getSize(elementSize); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2639 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2640 | |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 2641 | // Otherwise, do a full sdiv. This uses the "exact" form of sdiv, since |
| 2642 | // pointer difference in C is only defined in the case where both operands |
| 2643 | // are pointing to elements of an array. |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 2644 | return Builder.CreateExactSDiv(diffInChars, divisor, "sub.ptr.div"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2645 | } |
| 2646 | |
David Tweed | 7a83421 | 2013-01-07 16:43:27 +0000 | [diff] [blame] | 2647 | Value *ScalarExprEmitter::GetWidthMinusOneValue(Value* LHS,Value* RHS) { |
David Tweed | f20318f | 2013-01-10 09:11:33 +0000 | [diff] [blame] | 2648 | llvm::IntegerType *Ty; |
| 2649 | if (llvm::VectorType *VT = dyn_cast<llvm::VectorType>(LHS->getType())) |
| 2650 | Ty = cast<llvm::IntegerType>(VT->getElementType()); |
| 2651 | else |
| 2652 | Ty = cast<llvm::IntegerType>(LHS->getType()); |
| 2653 | return llvm::ConstantInt::get(RHS->getType(), Ty->getBitWidth() - 1); |
David Tweed | 7a83421 | 2013-01-07 16:43:27 +0000 | [diff] [blame] | 2654 | } |
| 2655 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2656 | Value *ScalarExprEmitter::EmitShl(const BinOpInfo &Ops) { |
| 2657 | // LLVM requires the LHS and RHS to be the same type: promote or truncate the |
| 2658 | // RHS to the same size as the LHS. |
| 2659 | Value *RHS = Ops.RHS; |
| 2660 | if (Ops.LHS->getType() != RHS->getType()) |
| 2661 | RHS = Builder.CreateIntCast(RHS, Ops.LHS->getType(), false, "sh_prom"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2662 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2663 | if (CGF.SanOpts.has(SanitizerKind::Shift) && !CGF.getLangOpts().OpenCL && |
Will Dietz | 4f45bc0 | 2013-01-18 11:30:38 +0000 | [diff] [blame] | 2664 | isa<llvm::IntegerType>(Ops.LHS->getType())) { |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2665 | CodeGenFunction::SanitizerScope SanScope(&CGF); |
David Tweed | 7a83421 | 2013-01-07 16:43:27 +0000 | [diff] [blame] | 2666 | llvm::Value *WidthMinusOne = GetWidthMinusOneValue(Ops.LHS, RHS); |
Will Dietz | bb60fc6 | 2013-02-25 22:37:49 +0000 | [diff] [blame] | 2667 | llvm::Value *Valid = Builder.CreateICmpULE(RHS, WidthMinusOne); |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2668 | |
| 2669 | if (Ops.Ty->hasSignedIntegerRepresentation()) { |
Will Dietz | bb60fc6 | 2013-02-25 22:37:49 +0000 | [diff] [blame] | 2670 | llvm::BasicBlock *Orig = Builder.GetInsertBlock(); |
| 2671 | llvm::BasicBlock *Cont = CGF.createBasicBlock("cont"); |
| 2672 | llvm::BasicBlock *CheckBitsShifted = CGF.createBasicBlock("check"); |
| 2673 | Builder.CreateCondBr(Valid, CheckBitsShifted, Cont); |
| 2674 | |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2675 | // Check whether we are shifting any non-zero bits off the top of the |
| 2676 | // integer. |
Will Dietz | bb60fc6 | 2013-02-25 22:37:49 +0000 | [diff] [blame] | 2677 | CGF.EmitBlock(CheckBitsShifted); |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2678 | llvm::Value *BitsShiftedOff = |
| 2679 | Builder.CreateLShr(Ops.LHS, |
| 2680 | Builder.CreateSub(WidthMinusOne, RHS, "shl.zeros", |
| 2681 | /*NUW*/true, /*NSW*/true), |
| 2682 | "shl.check"); |
| 2683 | if (CGF.getLangOpts().CPlusPlus) { |
| 2684 | // In C99, we are not permitted to shift a 1 bit into the sign bit. |
| 2685 | // Under C++11's rules, shifting a 1 bit into the sign bit is |
| 2686 | // OK, but shifting a 1 bit out of it is not. (C89 and C++03 don't |
| 2687 | // define signed left shifts, so we use the C99 and C++11 rules there). |
| 2688 | llvm::Value *One = llvm::ConstantInt::get(BitsShiftedOff->getType(), 1); |
| 2689 | BitsShiftedOff = Builder.CreateLShr(BitsShiftedOff, One); |
| 2690 | } |
| 2691 | llvm::Value *Zero = llvm::ConstantInt::get(BitsShiftedOff->getType(), 0); |
Will Dietz | bb60fc6 | 2013-02-25 22:37:49 +0000 | [diff] [blame] | 2692 | llvm::Value *SecondCheck = Builder.CreateICmpEQ(BitsShiftedOff, Zero); |
| 2693 | CGF.EmitBlock(Cont); |
| 2694 | llvm::PHINode *P = Builder.CreatePHI(Valid->getType(), 2); |
| 2695 | P->addIncoming(Valid, Orig); |
| 2696 | P->addIncoming(SecondCheck, CheckBitsShifted); |
| 2697 | Valid = P; |
Richard Smith | 9d3e226 | 2012-08-25 00:32:28 +0000 | [diff] [blame] | 2698 | } |
Will Dietz | bb60fc6 | 2013-02-25 22:37:49 +0000 | [diff] [blame] | 2699 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2700 | EmitBinOpCheck(std::make_pair(Valid, SanitizerKind::Shift), Ops); |
Mike Stump | be07f60 | 2009-12-14 21:58:14 +0000 | [diff] [blame] | 2701 | } |
David Tweed | 7a83421 | 2013-01-07 16:43:27 +0000 | [diff] [blame] | 2702 | // OpenCL 6.3j: shift values are effectively % word size of LHS. |
| 2703 | if (CGF.getLangOpts().OpenCL) |
| 2704 | RHS = Builder.CreateAnd(RHS, GetWidthMinusOneValue(Ops.LHS, RHS), "shl.mask"); |
Mike Stump | be07f60 | 2009-12-14 21:58:14 +0000 | [diff] [blame] | 2705 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2706 | return Builder.CreateShl(Ops.LHS, RHS, "shl"); |
| 2707 | } |
| 2708 | |
| 2709 | Value *ScalarExprEmitter::EmitShr(const BinOpInfo &Ops) { |
| 2710 | // LLVM requires the LHS and RHS to be the same type: promote or truncate the |
| 2711 | // RHS to the same size as the LHS. |
| 2712 | Value *RHS = Ops.RHS; |
| 2713 | if (Ops.LHS->getType() != RHS->getType()) |
| 2714 | RHS = Builder.CreateIntCast(RHS, Ops.LHS->getType(), false, "sh_prom"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2715 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2716 | if (CGF.SanOpts.has(SanitizerKind::Shift) && !CGF.getLangOpts().OpenCL && |
| 2717 | isa<llvm::IntegerType>(Ops.LHS->getType())) { |
| 2718 | CodeGenFunction::SanitizerScope SanScope(&CGF); |
| 2719 | llvm::Value *Valid = |
| 2720 | Builder.CreateICmpULE(RHS, GetWidthMinusOneValue(Ops.LHS, RHS)); |
| 2721 | EmitBinOpCheck(std::make_pair(Valid, SanitizerKind::Shift), Ops); |
| 2722 | } |
David Tweed | 7a83421 | 2013-01-07 16:43:27 +0000 | [diff] [blame] | 2723 | |
| 2724 | // OpenCL 6.3j: shift values are effectively % word size of LHS. |
| 2725 | if (CGF.getLangOpts().OpenCL) |
| 2726 | RHS = Builder.CreateAnd(RHS, GetWidthMinusOneValue(Ops.LHS, RHS), "shr.mask"); |
Mike Stump | be07f60 | 2009-12-14 21:58:14 +0000 | [diff] [blame] | 2727 | |
Douglas Gregor | f609462 | 2010-07-23 15:58:24 +0000 | [diff] [blame] | 2728 | if (Ops.Ty->hasUnsignedIntegerRepresentation()) |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2729 | return Builder.CreateLShr(Ops.LHS, RHS, "shr"); |
| 2730 | return Builder.CreateAShr(Ops.LHS, RHS, "shr"); |
| 2731 | } |
| 2732 | |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2733 | enum IntrinsicType { VCMPEQ, VCMPGT }; |
| 2734 | // return corresponding comparison intrinsic for given vector type |
| 2735 | static llvm::Intrinsic::ID GetIntrinsic(IntrinsicType IT, |
| 2736 | BuiltinType::Kind ElemKind) { |
| 2737 | switch (ElemKind) { |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 2738 | default: llvm_unreachable("unexpected element type"); |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2739 | case BuiltinType::Char_U: |
| 2740 | case BuiltinType::UChar: |
| 2741 | return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequb_p : |
| 2742 | llvm::Intrinsic::ppc_altivec_vcmpgtub_p; |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2743 | case BuiltinType::Char_S: |
| 2744 | case BuiltinType::SChar: |
| 2745 | return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequb_p : |
| 2746 | llvm::Intrinsic::ppc_altivec_vcmpgtsb_p; |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2747 | case BuiltinType::UShort: |
| 2748 | return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequh_p : |
| 2749 | llvm::Intrinsic::ppc_altivec_vcmpgtuh_p; |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2750 | case BuiltinType::Short: |
| 2751 | return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequh_p : |
| 2752 | llvm::Intrinsic::ppc_altivec_vcmpgtsh_p; |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2753 | case BuiltinType::UInt: |
| 2754 | case BuiltinType::ULong: |
| 2755 | return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequw_p : |
| 2756 | llvm::Intrinsic::ppc_altivec_vcmpgtuw_p; |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2757 | case BuiltinType::Int: |
| 2758 | case BuiltinType::Long: |
| 2759 | return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequw_p : |
| 2760 | llvm::Intrinsic::ppc_altivec_vcmpgtsw_p; |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2761 | case BuiltinType::Float: |
| 2762 | return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpeqfp_p : |
| 2763 | llvm::Intrinsic::ppc_altivec_vcmpgtfp_p; |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2764 | } |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2765 | } |
| 2766 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2767 | Value *ScalarExprEmitter::EmitCompare(const BinaryOperator *E,unsigned UICmpOpc, |
| 2768 | unsigned SICmpOpc, unsigned FCmpOpc) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 2769 | TestAndClearIgnoreResultAssign(); |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 2770 | Value *Result; |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2771 | QualType LHSTy = E->getLHS()->getType(); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2772 | QualType RHSTy = E->getRHS()->getType(); |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 2773 | if (const MemberPointerType *MPT = LHSTy->getAs<MemberPointerType>()) { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2774 | assert(E->getOpcode() == BO_EQ || |
| 2775 | E->getOpcode() == BO_NE); |
John McCall | d608cdb | 2010-08-22 10:59:02 +0000 | [diff] [blame] | 2776 | Value *LHS = CGF.EmitScalarExpr(E->getLHS()); |
| 2777 | Value *RHS = CGF.EmitScalarExpr(E->getRHS()); |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 2778 | Result = CGF.CGM.getCXXABI().EmitMemberPointerComparison( |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2779 | CGF, LHS, RHS, MPT, E->getOpcode() == BO_NE); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2780 | } else if (!LHSTy->isAnyComplexType() && !RHSTy->isAnyComplexType()) { |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2781 | Value *LHS = Visit(E->getLHS()); |
| 2782 | Value *RHS = Visit(E->getRHS()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2783 | |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2784 | // If AltiVec, the comparison results in a numeric type, so we use |
| 2785 | // intrinsics comparing vectors and giving 0 or 1 as a result |
Anton Yartsev | 6305f72 | 2011-03-28 21:00:05 +0000 | [diff] [blame] | 2786 | if (LHSTy->isVectorType() && !E->getType()->isVectorType()) { |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2787 | // constants for mapping CR6 register bits to predicate result |
| 2788 | enum { CR6_EQ=0, CR6_EQ_REV, CR6_LT, CR6_LT_REV } CR6; |
| 2789 | |
| 2790 | llvm::Intrinsic::ID ID = llvm::Intrinsic::not_intrinsic; |
| 2791 | |
| 2792 | // in several cases vector arguments order will be reversed |
| 2793 | Value *FirstVecArg = LHS, |
| 2794 | *SecondVecArg = RHS; |
| 2795 | |
| 2796 | QualType ElTy = LHSTy->getAs<VectorType>()->getElementType(); |
John McCall | f4c7371 | 2011-01-19 06:33:43 +0000 | [diff] [blame] | 2797 | const BuiltinType *BTy = ElTy->getAs<BuiltinType>(); |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2798 | BuiltinType::Kind ElementKind = BTy->getKind(); |
| 2799 | |
| 2800 | switch(E->getOpcode()) { |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 2801 | default: llvm_unreachable("is not a comparison operation"); |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2802 | case BO_EQ: |
| 2803 | CR6 = CR6_LT; |
| 2804 | ID = GetIntrinsic(VCMPEQ, ElementKind); |
| 2805 | break; |
| 2806 | case BO_NE: |
| 2807 | CR6 = CR6_EQ; |
| 2808 | ID = GetIntrinsic(VCMPEQ, ElementKind); |
| 2809 | break; |
| 2810 | case BO_LT: |
| 2811 | CR6 = CR6_LT; |
| 2812 | ID = GetIntrinsic(VCMPGT, ElementKind); |
| 2813 | std::swap(FirstVecArg, SecondVecArg); |
| 2814 | break; |
| 2815 | case BO_GT: |
| 2816 | CR6 = CR6_LT; |
| 2817 | ID = GetIntrinsic(VCMPGT, ElementKind); |
| 2818 | break; |
| 2819 | case BO_LE: |
| 2820 | if (ElementKind == BuiltinType::Float) { |
| 2821 | CR6 = CR6_LT; |
| 2822 | ID = llvm::Intrinsic::ppc_altivec_vcmpgefp_p; |
| 2823 | std::swap(FirstVecArg, SecondVecArg); |
| 2824 | } |
| 2825 | else { |
| 2826 | CR6 = CR6_EQ; |
| 2827 | ID = GetIntrinsic(VCMPGT, ElementKind); |
| 2828 | } |
| 2829 | break; |
| 2830 | case BO_GE: |
| 2831 | if (ElementKind == BuiltinType::Float) { |
| 2832 | CR6 = CR6_LT; |
| 2833 | ID = llvm::Intrinsic::ppc_altivec_vcmpgefp_p; |
| 2834 | } |
| 2835 | else { |
| 2836 | CR6 = CR6_EQ; |
| 2837 | ID = GetIntrinsic(VCMPGT, ElementKind); |
| 2838 | std::swap(FirstVecArg, SecondVecArg); |
| 2839 | } |
| 2840 | break; |
| 2841 | } |
| 2842 | |
Chris Lattner | 48431f9 | 2011-04-19 22:55:03 +0000 | [diff] [blame] | 2843 | Value *CR6Param = Builder.getInt32(CR6); |
Anton Yartsev | aa4fe05 | 2010-11-18 03:19:30 +0000 | [diff] [blame] | 2844 | llvm::Function *F = CGF.CGM.getIntrinsic(ID); |
| 2845 | Result = Builder.CreateCall3(F, CR6Param, FirstVecArg, SecondVecArg, ""); |
| 2846 | return EmitScalarConversion(Result, CGF.getContext().BoolTy, E->getType()); |
| 2847 | } |
| 2848 | |
Duncan Sands | f177d9d | 2010-02-15 16:14:01 +0000 | [diff] [blame] | 2849 | if (LHS->getType()->isFPOrFPVectorTy()) { |
Nate Begeman | 7a66d7b | 2008-07-25 20:16:05 +0000 | [diff] [blame] | 2850 | Result = Builder.CreateFCmp((llvm::CmpInst::Predicate)FCmpOpc, |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2851 | LHS, RHS, "cmp"); |
Douglas Gregor | f609462 | 2010-07-23 15:58:24 +0000 | [diff] [blame] | 2852 | } else if (LHSTy->hasSignedIntegerRepresentation()) { |
Eli Friedman | ec2c126 | 2008-05-29 15:09:15 +0000 | [diff] [blame] | 2853 | Result = Builder.CreateICmp((llvm::ICmpInst::Predicate)SICmpOpc, |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2854 | LHS, RHS, "cmp"); |
| 2855 | } else { |
Eli Friedman | ec2c126 | 2008-05-29 15:09:15 +0000 | [diff] [blame] | 2856 | // Unsigned integers and pointers. |
| 2857 | Result = Builder.CreateICmp((llvm::ICmpInst::Predicate)UICmpOpc, |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2858 | LHS, RHS, "cmp"); |
| 2859 | } |
Chris Lattner | 9c10fcf | 2009-07-08 01:08:03 +0000 | [diff] [blame] | 2860 | |
| 2861 | // If this is a vector comparison, sign extend the result to the appropriate |
| 2862 | // vector integer type and return it (don't convert to bool). |
| 2863 | if (LHSTy->isVectorType()) |
| 2864 | return Builder.CreateSExt(Result, ConvertType(E->getType()), "sext"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2865 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2866 | } else { |
| 2867 | // Complex Comparison: can only be an equality comparison. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 2868 | CodeGenFunction::ComplexPairTy LHS, RHS; |
| 2869 | QualType CETy; |
| 2870 | if (auto *CTy = LHSTy->getAs<ComplexType>()) { |
| 2871 | LHS = CGF.EmitComplexExpr(E->getLHS()); |
| 2872 | CETy = CTy->getElementType(); |
| 2873 | } else { |
| 2874 | LHS.first = Visit(E->getLHS()); |
| 2875 | LHS.second = llvm::Constant::getNullValue(LHS.first->getType()); |
| 2876 | CETy = LHSTy; |
| 2877 | } |
| 2878 | if (auto *CTy = RHSTy->getAs<ComplexType>()) { |
| 2879 | RHS = CGF.EmitComplexExpr(E->getRHS()); |
| 2880 | assert(CGF.getContext().hasSameUnqualifiedType(CETy, |
| 2881 | CTy->getElementType()) && |
| 2882 | "The element types must always match."); |
| 2883 | (void)CTy; |
| 2884 | } else { |
| 2885 | RHS.first = Visit(E->getRHS()); |
| 2886 | RHS.second = llvm::Constant::getNullValue(RHS.first->getType()); |
| 2887 | assert(CGF.getContext().hasSameUnqualifiedType(CETy, RHSTy) && |
| 2888 | "The element types must always match."); |
| 2889 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2890 | |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 2891 | Value *ResultR, *ResultI; |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2892 | if (CETy->isRealFloatingType()) { |
| 2893 | ResultR = Builder.CreateFCmp((llvm::FCmpInst::Predicate)FCmpOpc, |
| 2894 | LHS.first, RHS.first, "cmp.r"); |
| 2895 | ResultI = Builder.CreateFCmp((llvm::FCmpInst::Predicate)FCmpOpc, |
| 2896 | LHS.second, RHS.second, "cmp.i"); |
| 2897 | } else { |
| 2898 | // Complex comparisons can only be equality comparisons. As such, signed |
| 2899 | // and unsigned opcodes are the same. |
| 2900 | ResultR = Builder.CreateICmp((llvm::ICmpInst::Predicate)UICmpOpc, |
| 2901 | LHS.first, RHS.first, "cmp.r"); |
| 2902 | ResultI = Builder.CreateICmp((llvm::ICmpInst::Predicate)UICmpOpc, |
| 2903 | LHS.second, RHS.second, "cmp.i"); |
| 2904 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2905 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2906 | if (E->getOpcode() == BO_EQ) { |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2907 | Result = Builder.CreateAnd(ResultR, ResultI, "and.ri"); |
| 2908 | } else { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2909 | assert(E->getOpcode() == BO_NE && |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2910 | "Complex comparison other than == or != ?"); |
| 2911 | Result = Builder.CreateOr(ResultR, ResultI, "or.ri"); |
| 2912 | } |
| 2913 | } |
Nuno Lopes | 32f6209 | 2009-01-11 23:22:37 +0000 | [diff] [blame] | 2914 | |
| 2915 | return EmitScalarConversion(Result, CGF.getContext().BoolTy, E->getType()); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2916 | } |
| 2917 | |
| 2918 | Value *ScalarExprEmitter::VisitBinAssign(const BinaryOperator *E) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 2919 | bool Ignore = TestAndClearIgnoreResultAssign(); |
| 2920 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2921 | Value *RHS; |
| 2922 | LValue LHS; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2923 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2924 | switch (E->getLHS()->getType().getObjCLifetime()) { |
| 2925 | case Qualifiers::OCL_Strong: |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2926 | std::tie(LHS, RHS) = CGF.EmitARCStoreStrong(E, Ignore); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2927 | break; |
| 2928 | |
| 2929 | case Qualifiers::OCL_Autoreleasing: |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2930 | std::tie(LHS, RHS) = CGF.EmitARCStoreAutoreleasing(E); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2931 | break; |
| 2932 | |
| 2933 | case Qualifiers::OCL_Weak: |
| 2934 | RHS = Visit(E->getRHS()); |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2935 | LHS = EmitCheckedLValue(E->getLHS(), CodeGenFunction::TCK_Store); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2936 | RHS = CGF.EmitARCStoreWeak(LHS.getAddress(), RHS, Ignore); |
| 2937 | break; |
| 2938 | |
| 2939 | // No reason to do any of these differently. |
| 2940 | case Qualifiers::OCL_None: |
| 2941 | case Qualifiers::OCL_ExplicitNone: |
| 2942 | // __block variables need to have the rhs evaluated first, plus |
| 2943 | // this should improve codegen just a little. |
| 2944 | RHS = Visit(E->getRHS()); |
Richard Smith | 7ac9ef1 | 2012-09-08 02:08:36 +0000 | [diff] [blame] | 2945 | LHS = EmitCheckedLValue(E->getLHS(), CodeGenFunction::TCK_Store); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2946 | |
| 2947 | // Store the value into the LHS. Bit-fields are handled specially |
| 2948 | // because the result is altered by the store, i.e., [C99 6.5.16p1] |
| 2949 | // 'An assignment expression has the value of the left operand after |
| 2950 | // the assignment...'. |
| 2951 | if (LHS.isBitField()) |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 2952 | CGF.EmitStoreThroughBitfieldLValue(RValue::get(RHS), LHS, &RHS); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2953 | else |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 2954 | CGF.EmitStoreThroughLValue(RValue::get(RHS), LHS); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2955 | } |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2956 | |
| 2957 | // If the result is clearly ignored, return now. |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 2958 | if (Ignore) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2959 | return nullptr; |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2960 | |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2961 | // The result of an assignment in C is the assigned r-value. |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 2962 | if (!CGF.getLangOpts().CPlusPlus) |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 2963 | return RHS; |
| 2964 | |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 2965 | // If the lvalue is non-volatile, return the computed value of the assignment. |
| 2966 | if (!LHS.isVolatileQualified()) |
| 2967 | return RHS; |
| 2968 | |
| 2969 | // Otherwise, reload the value. |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 2970 | return EmitLoadOfLValue(LHS, E->getExprLoc()); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2971 | } |
| 2972 | |
| 2973 | Value *ScalarExprEmitter::VisitBinLAnd(const BinaryOperator *E) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2974 | RegionCounter Cnt = CGF.getPGORegionCounter(E); |
| 2975 | |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 2976 | // Perform vector logical and on comparisons with zero vectors. |
| 2977 | if (E->getType()->isVectorType()) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2978 | Cnt.beginRegion(Builder); |
| 2979 | |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 2980 | Value *LHS = Visit(E->getLHS()); |
| 2981 | Value *RHS = Visit(E->getRHS()); |
| 2982 | Value *Zero = llvm::ConstantAggregateZero::get(LHS->getType()); |
Joey Gouly | 52e933b | 2013-02-21 11:49:56 +0000 | [diff] [blame] | 2983 | if (LHS->getType()->isFPOrFPVectorTy()) { |
| 2984 | LHS = Builder.CreateFCmp(llvm::CmpInst::FCMP_UNE, LHS, Zero, "cmp"); |
| 2985 | RHS = Builder.CreateFCmp(llvm::CmpInst::FCMP_UNE, RHS, Zero, "cmp"); |
| 2986 | } else { |
| 2987 | LHS = Builder.CreateICmp(llvm::CmpInst::ICMP_NE, LHS, Zero, "cmp"); |
| 2988 | RHS = Builder.CreateICmp(llvm::CmpInst::ICMP_NE, RHS, Zero, "cmp"); |
| 2989 | } |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 2990 | Value *And = Builder.CreateAnd(LHS, RHS); |
Joey Gouly | 52e933b | 2013-02-21 11:49:56 +0000 | [diff] [blame] | 2991 | return Builder.CreateSExt(And, ConvertType(E->getType()), "sext"); |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 2992 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2993 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2994 | llvm::Type *ResTy = ConvertType(E->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 2995 | |
Chris Lattner | 20eb09d | 2008-11-12 08:26:50 +0000 | [diff] [blame] | 2996 | // If we have 0 && RHS, see if we can elide RHS, if so, just return 0. |
| 2997 | // 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] | 2998 | bool LHSCondVal; |
| 2999 | if (CGF.ConstantFoldsToSimpleInteger(E->getLHS(), LHSCondVal)) { |
| 3000 | if (LHSCondVal) { // If we have 1 && X, just emit X. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3001 | Cnt.beginRegion(Builder); |
| 3002 | |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 3003 | Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3004 | // ZExt result to int or bool. |
| 3005 | return Builder.CreateZExtOrBitCast(RHSCond, ResTy, "land.ext"); |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 3006 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3007 | |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3008 | // 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] | 3009 | if (!CGF.ContainsLabel(E->getRHS())) |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3010 | return llvm::Constant::getNullValue(ResTy); |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 3011 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3012 | |
Daniel Dunbar | 9615ecb | 2008-11-13 01:38:36 +0000 | [diff] [blame] | 3013 | llvm::BasicBlock *ContBlock = CGF.createBasicBlock("land.end"); |
| 3014 | llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("land.rhs"); |
Chris Lattner | 20eb09d | 2008-11-12 08:26:50 +0000 | [diff] [blame] | 3015 | |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3016 | CodeGenFunction::ConditionalEvaluation eval(CGF); |
| 3017 | |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3018 | // 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] | 3019 | CGF.EmitBranchOnBoolExpr(E->getLHS(), RHSBlock, ContBlock, Cnt.getCount()); |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3020 | |
| 3021 | // Any edges into the ContBlock are now from an (indeterminate number of) |
| 3022 | // edges from this first condition. All of these values will be false. Start |
| 3023 | // setting up the PHI node in the Cont Block for this. |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 3024 | llvm::PHINode *PN = llvm::PHINode::Create(llvm::Type::getInt1Ty(VMContext), 2, |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 3025 | "", ContBlock); |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3026 | for (llvm::pred_iterator PI = pred_begin(ContBlock), PE = pred_end(ContBlock); |
| 3027 | PI != PE; ++PI) |
Owen Anderson | 3b144ba | 2009-07-31 17:39:36 +0000 | [diff] [blame] | 3028 | PN->addIncoming(llvm::ConstantInt::getFalse(VMContext), *PI); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3029 | |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3030 | eval.begin(CGF); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3031 | CGF.EmitBlock(RHSBlock); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3032 | Cnt.beginRegion(Builder); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3033 | Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3034 | eval.end(CGF); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3035 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3036 | // Reaquire the RHS block, as there may be subblocks inserted. |
| 3037 | RHSBlock = Builder.GetInsertBlock(); |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3038 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 3039 | // Emit an unconditional branch from this block to ContBlock. |
| 3040 | { |
Devang Patel | acd7236 | 2011-03-30 00:08:31 +0000 | [diff] [blame] | 3041 | // There is no need to emit line number for unconditional branch. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 3042 | SuppressDebugLocation S(Builder); |
| 3043 | CGF.EmitBlock(ContBlock); |
| 3044 | } |
| 3045 | // 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] | 3046 | PN->addIncoming(RHSCond, RHSBlock); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3047 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3048 | // ZExt result to int. |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3049 | return Builder.CreateZExtOrBitCast(PN, ResTy, "land.ext"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3050 | } |
| 3051 | |
| 3052 | Value *ScalarExprEmitter::VisitBinLOr(const BinaryOperator *E) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3053 | RegionCounter Cnt = CGF.getPGORegionCounter(E); |
| 3054 | |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 3055 | // Perform vector logical or on comparisons with zero vectors. |
| 3056 | if (E->getType()->isVectorType()) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3057 | Cnt.beginRegion(Builder); |
| 3058 | |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 3059 | Value *LHS = Visit(E->getLHS()); |
| 3060 | Value *RHS = Visit(E->getRHS()); |
| 3061 | Value *Zero = llvm::ConstantAggregateZero::get(LHS->getType()); |
Joey Gouly | 52e933b | 2013-02-21 11:49:56 +0000 | [diff] [blame] | 3062 | if (LHS->getType()->isFPOrFPVectorTy()) { |
| 3063 | LHS = Builder.CreateFCmp(llvm::CmpInst::FCMP_UNE, LHS, Zero, "cmp"); |
| 3064 | RHS = Builder.CreateFCmp(llvm::CmpInst::FCMP_UNE, RHS, Zero, "cmp"); |
| 3065 | } else { |
| 3066 | LHS = Builder.CreateICmp(llvm::CmpInst::ICMP_NE, LHS, Zero, "cmp"); |
| 3067 | RHS = Builder.CreateICmp(llvm::CmpInst::ICMP_NE, RHS, Zero, "cmp"); |
| 3068 | } |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 3069 | Value *Or = Builder.CreateOr(LHS, RHS); |
Joey Gouly | 52e933b | 2013-02-21 11:49:56 +0000 | [diff] [blame] | 3070 | return Builder.CreateSExt(Or, ConvertType(E->getType()), "sext"); |
Tanya Lattner | 4f692c2 | 2012-01-16 21:02:28 +0000 | [diff] [blame] | 3071 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3072 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3073 | llvm::Type *ResTy = ConvertType(E->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3074 | |
Chris Lattner | 20eb09d | 2008-11-12 08:26:50 +0000 | [diff] [blame] | 3075 | // If we have 1 || RHS, see if we can elide RHS, if so, just return 1. |
| 3076 | // 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] | 3077 | bool LHSCondVal; |
| 3078 | if (CGF.ConstantFoldsToSimpleInteger(E->getLHS(), LHSCondVal)) { |
| 3079 | if (!LHSCondVal) { // If we have 0 || X, just emit X. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3080 | Cnt.beginRegion(Builder); |
| 3081 | |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 3082 | Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3083 | // ZExt result to int or bool. |
| 3084 | return Builder.CreateZExtOrBitCast(RHSCond, ResTy, "lor.ext"); |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 3085 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3086 | |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3087 | // 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] | 3088 | if (!CGF.ContainsLabel(E->getRHS())) |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3089 | return llvm::ConstantInt::get(ResTy, 1); |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 3090 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3091 | |
Daniel Dunbar | 9615ecb | 2008-11-13 01:38:36 +0000 | [diff] [blame] | 3092 | llvm::BasicBlock *ContBlock = CGF.createBasicBlock("lor.end"); |
| 3093 | llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("lor.rhs"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3094 | |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3095 | CodeGenFunction::ConditionalEvaluation eval(CGF); |
| 3096 | |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3097 | // 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] | 3098 | CGF.EmitBranchOnBoolExpr(E->getLHS(), ContBlock, RHSBlock, |
| 3099 | Cnt.getParentCount() - Cnt.getCount()); |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3100 | |
| 3101 | // Any edges into the ContBlock are now from an (indeterminate number of) |
| 3102 | // edges from this first condition. All of these values will be true. Start |
| 3103 | // setting up the PHI node in the Cont Block for this. |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 3104 | llvm::PHINode *PN = llvm::PHINode::Create(llvm::Type::getInt1Ty(VMContext), 2, |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 3105 | "", ContBlock); |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3106 | for (llvm::pred_iterator PI = pred_begin(ContBlock), PE = pred_end(ContBlock); |
| 3107 | PI != PE; ++PI) |
Owen Anderson | 3b144ba | 2009-07-31 17:39:36 +0000 | [diff] [blame] | 3108 | PN->addIncoming(llvm::ConstantInt::getTrue(VMContext), *PI); |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3109 | |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3110 | eval.begin(CGF); |
Anders Carlsson | 33da07d | 2009-06-04 02:53:13 +0000 | [diff] [blame] | 3111 | |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3112 | // Emit the RHS condition as a bool value. |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3113 | CGF.EmitBlock(RHSBlock); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3114 | Cnt.beginRegion(Builder); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3115 | Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3116 | |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3117 | eval.end(CGF); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3118 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3119 | // Reaquire the RHS block, as there may be subblocks inserted. |
| 3120 | RHSBlock = Builder.GetInsertBlock(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3121 | |
Chris Lattner | f7b5ea9 | 2008-11-12 08:38:24 +0000 | [diff] [blame] | 3122 | // Emit an unconditional branch from this block to ContBlock. Insert an entry |
| 3123 | // into the phi node for the edge with the value of RHSCond. |
| 3124 | CGF.EmitBlock(ContBlock); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3125 | PN->addIncoming(RHSCond, RHSBlock); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3126 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3127 | // ZExt result to int. |
Chris Lattner | 7804bcb | 2009-10-17 04:24:20 +0000 | [diff] [blame] | 3128 | return Builder.CreateZExtOrBitCast(PN, ResTy, "lor.ext"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3129 | } |
| 3130 | |
| 3131 | Value *ScalarExprEmitter::VisitBinComma(const BinaryOperator *E) { |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 3132 | CGF.EmitIgnoredExpr(E->getLHS()); |
Daniel Dunbar | a448fb2 | 2008-11-11 23:11:34 +0000 | [diff] [blame] | 3133 | CGF.EnsureInsertPoint(); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3134 | return Visit(E->getRHS()); |
| 3135 | } |
| 3136 | |
| 3137 | //===----------------------------------------------------------------------===// |
| 3138 | // Other Operators |
| 3139 | //===----------------------------------------------------------------------===// |
| 3140 | |
Chris Lattner | 9802a51 | 2008-11-12 08:55:54 +0000 | [diff] [blame] | 3141 | /// isCheapEnoughToEvaluateUnconditionally - Return true if the specified |
| 3142 | /// expression is cheap enough and side-effect-free enough to evaluate |
| 3143 | /// unconditionally instead of conditionally. This is used to convert control |
| 3144 | /// flow into selects in some cases. |
Mike Stump | df317bf | 2009-11-03 23:25:48 +0000 | [diff] [blame] | 3145 | static bool isCheapEnoughToEvaluateUnconditionally(const Expr *E, |
| 3146 | CodeGenFunction &CGF) { |
Chris Lattner | c6bea67 | 2011-04-16 23:15:35 +0000 | [diff] [blame] | 3147 | // Anything that is an integer or floating point constant is fine. |
Nick Lewycky | c569917 | 2013-11-08 23:00:12 +0000 | [diff] [blame] | 3148 | return E->IgnoreParens()->isEvaluatable(CGF.getContext()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3149 | |
Nick Lewycky | c569917 | 2013-11-08 23:00:12 +0000 | [diff] [blame] | 3150 | // Even non-volatile automatic variables can't be evaluated unconditionally. |
| 3151 | // Referencing a thread_local may cause non-trivial initialization work to |
| 3152 | // occur. If we're inside a lambda and one of the variables is from the scope |
| 3153 | // outside the lambda, that function may have returned already. Reading its |
| 3154 | // locals is a bad idea. Also, these reads may introduce races there didn't |
| 3155 | // exist in the source-level program. |
Chris Lattner | 9802a51 | 2008-11-12 08:55:54 +0000 | [diff] [blame] | 3156 | } |
| 3157 | |
| 3158 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3159 | Value *ScalarExprEmitter:: |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3160 | VisitAbstractConditionalOperator(const AbstractConditionalOperator *E) { |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 3161 | TestAndClearIgnoreResultAssign(); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3162 | |
| 3163 | // Bind the common expression if necessary. |
Eli Friedman | d97927d | 2012-01-06 20:42:20 +0000 | [diff] [blame] | 3164 | CodeGenFunction::OpaqueValueMapping binding(CGF, E); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3165 | RegionCounter Cnt = CGF.getPGORegionCounter(E); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3166 | |
| 3167 | Expr *condExpr = E->getCond(); |
| 3168 | Expr *lhsExpr = E->getTrueExpr(); |
| 3169 | Expr *rhsExpr = E->getFalseExpr(); |
| 3170 | |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 3171 | // If the condition constant folds and can be elided, try to avoid emitting |
| 3172 | // the condition and the dead arm. |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 3173 | bool CondExprBool; |
| 3174 | if (CGF.ConstantFoldsToSimpleInteger(condExpr, CondExprBool)) { |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3175 | Expr *live = lhsExpr, *dead = rhsExpr; |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 3176 | if (!CondExprBool) std::swap(live, dead); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3177 | |
Eli Friedman | c8645e3 | 2011-10-15 02:10:40 +0000 | [diff] [blame] | 3178 | // If the dead side doesn't have labels we need, just emit the Live part. |
| 3179 | if (!CGF.ContainsLabel(dead)) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3180 | if (CondExprBool) |
| 3181 | Cnt.beginRegion(Builder); |
Eli Friedman | c8645e3 | 2011-10-15 02:10:40 +0000 | [diff] [blame] | 3182 | Value *Result = Visit(live); |
| 3183 | |
| 3184 | // If the live part is a throw expression, it acts like it has a void |
| 3185 | // type, so evaluating it returns a null Value*. However, a conditional |
| 3186 | // with non-void type must return a non-null Value*. |
| 3187 | if (!Result && !E->getType()->isVoidType()) |
| 3188 | Result = llvm::UndefValue::get(CGF.ConvertType(E->getType())); |
| 3189 | |
| 3190 | return Result; |
| 3191 | } |
Chris Lattner | c657e92 | 2008-11-11 18:56:45 +0000 | [diff] [blame] | 3192 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3193 | |
Nate Begeman | 6155d73 | 2010-09-20 22:41:17 +0000 | [diff] [blame] | 3194 | // OpenCL: If the condition is a vector, we can treat this condition like |
| 3195 | // the select function. |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3196 | if (CGF.getLangOpts().OpenCL |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3197 | && condExpr->getType()->isVectorType()) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3198 | Cnt.beginRegion(Builder); |
| 3199 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3200 | llvm::Value *CondV = CGF.EmitScalarExpr(condExpr); |
| 3201 | llvm::Value *LHS = Visit(lhsExpr); |
| 3202 | llvm::Value *RHS = Visit(rhsExpr); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3203 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3204 | llvm::Type *condType = ConvertType(condExpr->getType()); |
| 3205 | llvm::VectorType *vecTy = cast<llvm::VectorType>(condType); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3206 | |
| 3207 | unsigned numElem = vecTy->getNumElements(); |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3208 | llvm::Type *elemType = vecTy->getElementType(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3209 | |
Chris Lattner | 2ce8842 | 2012-01-25 05:34:41 +0000 | [diff] [blame] | 3210 | llvm::Value *zeroVec = llvm::Constant::getNullValue(vecTy); |
Nate Begeman | 6155d73 | 2010-09-20 22:41:17 +0000 | [diff] [blame] | 3211 | llvm::Value *TestMSB = Builder.CreateICmpSLT(CondV, zeroVec); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3212 | llvm::Value *tmp = Builder.CreateSExt(TestMSB, |
Nate Begeman | 6155d73 | 2010-09-20 22:41:17 +0000 | [diff] [blame] | 3213 | llvm::VectorType::get(elemType, |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3214 | numElem), |
Nate Begeman | 6155d73 | 2010-09-20 22:41:17 +0000 | [diff] [blame] | 3215 | "sext"); |
| 3216 | llvm::Value *tmp2 = Builder.CreateNot(tmp); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3217 | |
Nate Begeman | 6155d73 | 2010-09-20 22:41:17 +0000 | [diff] [blame] | 3218 | // Cast float to int to perform ANDs if necessary. |
| 3219 | llvm::Value *RHSTmp = RHS; |
| 3220 | llvm::Value *LHSTmp = LHS; |
| 3221 | bool wasCast = false; |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3222 | llvm::VectorType *rhsVTy = cast<llvm::VectorType>(RHS->getType()); |
Peter Collingbourne | 565204d | 2012-05-29 00:35:18 +0000 | [diff] [blame] | 3223 | if (rhsVTy->getElementType()->isFloatingPointTy()) { |
Nate Begeman | 6155d73 | 2010-09-20 22:41:17 +0000 | [diff] [blame] | 3224 | RHSTmp = Builder.CreateBitCast(RHS, tmp2->getType()); |
| 3225 | LHSTmp = Builder.CreateBitCast(LHS, tmp->getType()); |
| 3226 | wasCast = true; |
| 3227 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3228 | |
Nate Begeman | 6155d73 | 2010-09-20 22:41:17 +0000 | [diff] [blame] | 3229 | llvm::Value *tmp3 = Builder.CreateAnd(RHSTmp, tmp2); |
| 3230 | llvm::Value *tmp4 = Builder.CreateAnd(LHSTmp, tmp); |
| 3231 | llvm::Value *tmp5 = Builder.CreateOr(tmp3, tmp4, "cond"); |
| 3232 | if (wasCast) |
| 3233 | tmp5 = Builder.CreateBitCast(tmp5, RHS->getType()); |
| 3234 | |
| 3235 | return tmp5; |
| 3236 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3237 | |
Chris Lattner | 9802a51 | 2008-11-12 08:55:54 +0000 | [diff] [blame] | 3238 | // If this is a really simple expression (like x ? 4 : 5), emit this as a |
| 3239 | // 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] | 3240 | // safe to evaluate the LHS and RHS unconditionally. |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3241 | if (isCheapEnoughToEvaluateUnconditionally(lhsExpr, CGF) && |
| 3242 | isCheapEnoughToEvaluateUnconditionally(rhsExpr, CGF)) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3243 | Cnt.beginRegion(Builder); |
| 3244 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3245 | llvm::Value *CondV = CGF.EvaluateExprAsBool(condExpr); |
| 3246 | llvm::Value *LHS = Visit(lhsExpr); |
| 3247 | llvm::Value *RHS = Visit(rhsExpr); |
Eli Friedman | 1e4f68c | 2011-12-08 22:01:56 +0000 | [diff] [blame] | 3248 | if (!LHS) { |
| 3249 | // If the conditional has void type, make sure we return a null Value*. |
| 3250 | assert(!RHS && "LHS and RHS types must match"); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 3251 | return nullptr; |
Eli Friedman | 1e4f68c | 2011-12-08 22:01:56 +0000 | [diff] [blame] | 3252 | } |
Chris Lattner | 9802a51 | 2008-11-12 08:55:54 +0000 | [diff] [blame] | 3253 | return Builder.CreateSelect(CondV, LHS, RHS, "cond"); |
| 3254 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3255 | |
Daniel Dunbar | be65abc | 2008-11-12 10:13:37 +0000 | [diff] [blame] | 3256 | llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); |
| 3257 | llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); |
Daniel Dunbar | 9615ecb | 2008-11-13 01:38:36 +0000 | [diff] [blame] | 3258 | llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3259 | |
| 3260 | CodeGenFunction::ConditionalEvaluation eval(CGF); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3261 | CGF.EmitBranchOnBoolExpr(condExpr, LHSBlock, RHSBlock, Cnt.getCount()); |
Anders Carlsson | fb6fa30 | 2009-06-04 03:00:32 +0000 | [diff] [blame] | 3262 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3263 | CGF.EmitBlock(LHSBlock); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 3264 | Cnt.beginRegion(Builder); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3265 | eval.begin(CGF); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3266 | Value *LHS = Visit(lhsExpr); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3267 | eval.end(CGF); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3268 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3269 | LHSBlock = Builder.GetInsertBlock(); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3270 | Builder.CreateBr(ContBlock); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3271 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3272 | CGF.EmitBlock(RHSBlock); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3273 | eval.begin(CGF); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 3274 | Value *RHS = Visit(rhsExpr); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3275 | eval.end(CGF); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3276 | |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 3277 | RHSBlock = Builder.GetInsertBlock(); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3278 | CGF.EmitBlock(ContBlock); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3279 | |
Eli Friedman | 48daf59 | 2009-12-07 20:25:53 +0000 | [diff] [blame] | 3280 | // If the LHS or RHS is a throw expression, it will be legitimately null. |
| 3281 | if (!LHS) |
| 3282 | return RHS; |
| 3283 | if (!RHS) |
| 3284 | return LHS; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3285 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3286 | // Create a PHI node for the real part. |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 3287 | llvm::PHINode *PN = Builder.CreatePHI(LHS->getType(), 2, "cond"); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3288 | PN->addIncoming(LHS, LHSBlock); |
| 3289 | PN->addIncoming(RHS, RHSBlock); |
| 3290 | return PN; |
| 3291 | } |
| 3292 | |
| 3293 | Value *ScalarExprEmitter::VisitChooseExpr(ChooseExpr *E) { |
Eli Friedman | a5e6601 | 2013-07-20 00:40:58 +0000 | [diff] [blame] | 3294 | return Visit(E->getChosenSubExpr()); |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3295 | } |
| 3296 | |
Chris Lattner | 2202bce | 2007-11-30 17:56:23 +0000 | [diff] [blame] | 3297 | Value *ScalarExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 3298 | QualType Ty = VE->getType(); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 3299 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 3300 | if (Ty->isVariablyModifiedType()) |
| 3301 | CGF.EmitVariablyModifiedType(Ty); |
| 3302 | |
Eli Friedman | 4fd0aa5 | 2009-01-20 17:46:04 +0000 | [diff] [blame] | 3303 | llvm::Value *ArgValue = CGF.EmitVAListRef(VE->getSubExpr()); |
Anders Carlsson | ddf7cac | 2008-11-04 05:30:00 +0000 | [diff] [blame] | 3304 | llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType()); |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 3305 | llvm::Type *ArgTy = ConvertType(VE->getType()); |
Anders Carlsson | ddf7cac | 2008-11-04 05:30:00 +0000 | [diff] [blame] | 3306 | |
| 3307 | // If EmitVAArg fails, we fall back to the LLVM instruction. |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3308 | if (!ArgPtr) |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 3309 | return Builder.CreateVAArg(ArgValue, ArgTy); |
Anders Carlsson | ddf7cac | 2008-11-04 05:30:00 +0000 | [diff] [blame] | 3310 | |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 3311 | // FIXME Volatility. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 3312 | llvm::Value *Val = Builder.CreateLoad(ArgPtr); |
| 3313 | |
| 3314 | // If EmitVAArg promoted the type, we must truncate it. |
| 3315 | if (ArgTy != Val->getType()) |
| 3316 | Val = Builder.CreateTrunc(Val, ArgTy); |
| 3317 | |
| 3318 | return Val; |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 3319 | } |
| 3320 | |
John McCall | 6b5a61b | 2011-02-07 10:33:21 +0000 | [diff] [blame] | 3321 | Value *ScalarExprEmitter::VisitBlockExpr(const BlockExpr *block) { |
| 3322 | return CGF.EmitBlockLiteral(block); |
Mike Stump | df6b68c | 2009-02-12 18:29:15 +0000 | [diff] [blame] | 3323 | } |
| 3324 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3325 | Value *ScalarExprEmitter::VisitAsTypeExpr(AsTypeExpr *E) { |
| 3326 | Value *Src = CGF.EmitScalarExpr(E->getSrcExpr()); |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3327 | llvm::Type *DstTy = ConvertType(E->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3328 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3329 | // Going from vec4->vec3 or vec3->vec4 is a special case and requires |
| 3330 | // a shuffle vector instead of a bitcast. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3331 | llvm::Type *SrcTy = Src->getType(); |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3332 | if (isa<llvm::VectorType>(DstTy) && isa<llvm::VectorType>(SrcTy)) { |
| 3333 | unsigned numElementsDst = cast<llvm::VectorType>(DstTy)->getNumElements(); |
| 3334 | unsigned numElementsSrc = cast<llvm::VectorType>(SrcTy)->getNumElements(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3335 | if ((numElementsDst == 3 && numElementsSrc == 4) |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3336 | || (numElementsDst == 4 && numElementsSrc == 3)) { |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3337 | |
| 3338 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3339 | // In the case of going from int4->float3, a bitcast is needed before |
| 3340 | // doing a shuffle. |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3341 | llvm::Type *srcElemTy = |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3342 | cast<llvm::VectorType>(SrcTy)->getElementType(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3343 | llvm::Type *dstElemTy = |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3344 | cast<llvm::VectorType>(DstTy)->getElementType(); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3345 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3346 | if ((srcElemTy->isIntegerTy() && dstElemTy->isFloatTy()) |
| 3347 | || (srcElemTy->isFloatTy() && dstElemTy->isIntegerTy())) { |
| 3348 | // 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] | 3349 | llvm::VectorType *newSrcTy = llvm::VectorType::get(dstElemTy, |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3350 | numElementsSrc); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3351 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3352 | Src = Builder.CreateBitCast(Src, newSrcTy, "astypeCast"); |
| 3353 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3354 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3355 | llvm::Value *UnV = llvm::UndefValue::get(Src->getType()); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3356 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 3357 | SmallVector<llvm::Constant*, 3> Args; |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3358 | Args.push_back(Builder.getInt32(0)); |
| 3359 | Args.push_back(Builder.getInt32(1)); |
| 3360 | Args.push_back(Builder.getInt32(2)); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3361 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3362 | if (numElementsDst == 4) |
Chris Lattner | 8b41868 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 3363 | Args.push_back(llvm::UndefValue::get(CGF.Int32Ty)); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3364 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3365 | llvm::Constant *Mask = llvm::ConstantVector::get(Args); |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3366 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3367 | return Builder.CreateShuffleVector(Src, UnV, Mask, "astype"); |
| 3368 | } |
| 3369 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3370 | |
Tanya Lattner | 61eee0c | 2011-06-04 00:47:47 +0000 | [diff] [blame] | 3371 | return Builder.CreateBitCast(Src, DstTy, "astype"); |
| 3372 | } |
| 3373 | |
Eli Friedman | 276b061 | 2011-10-11 02:20:01 +0000 | [diff] [blame] | 3374 | Value *ScalarExprEmitter::VisitAtomicExpr(AtomicExpr *E) { |
| 3375 | return CGF.EmitAtomicExpr(E).getScalarVal(); |
| 3376 | } |
| 3377 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3378 | //===----------------------------------------------------------------------===// |
| 3379 | // Entry Point into this File |
| 3380 | //===----------------------------------------------------------------------===// |
| 3381 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3382 | /// EmitScalarExpr - Emit the computation of the specified expression of scalar |
| 3383 | /// type, ignoring the result. |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 3384 | Value *CodeGenFunction::EmitScalarExpr(const Expr *E, bool IgnoreResultAssign) { |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 3385 | assert(E && hasScalarEvaluationKind(E->getType()) && |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3386 | "Invalid scalar expression to emit"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3387 | |
Devang Patel | 5de7a0e | 2011-03-07 18:29:53 +0000 | [diff] [blame] | 3388 | if (isa<CXXDefaultArgExpr>(E)) |
Devang Patel | aa11289 | 2011-03-07 18:45:56 +0000 | [diff] [blame] | 3389 | disableDebugInfo(); |
Devang Patel | 5de7a0e | 2011-03-07 18:29:53 +0000 | [diff] [blame] | 3390 | Value *V = ScalarExprEmitter(*this, IgnoreResultAssign) |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 3391 | .Visit(const_cast<Expr*>(E)); |
Devang Patel | 5de7a0e | 2011-03-07 18:29:53 +0000 | [diff] [blame] | 3392 | if (isa<CXXDefaultArgExpr>(E)) |
Devang Patel | aa11289 | 2011-03-07 18:45:56 +0000 | [diff] [blame] | 3393 | enableDebugInfo(); |
Devang Patel | 5de7a0e | 2011-03-07 18:29:53 +0000 | [diff] [blame] | 3394 | return V; |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 3395 | } |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 3396 | |
| 3397 | /// EmitScalarConversion - Emit a conversion from the specified type to the |
| 3398 | /// specified destination type, both of which are LLVM scalar types. |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 3399 | Value *CodeGenFunction::EmitScalarConversion(Value *Src, QualType SrcTy, |
| 3400 | QualType DstTy) { |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 3401 | assert(hasScalarEvaluationKind(SrcTy) && hasScalarEvaluationKind(DstTy) && |
Chris Lattner | 3707b25 | 2007-08-26 06:48:56 +0000 | [diff] [blame] | 3402 | "Invalid scalar expression to emit"); |
| 3403 | return ScalarExprEmitter(*this).EmitScalarConversion(Src, SrcTy, DstTy); |
| 3404 | } |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 3405 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 3406 | /// EmitComplexToScalarConversion - Emit a conversion from the specified complex |
| 3407 | /// type to the specified destination type, where the destination type is an |
| 3408 | /// LLVM scalar type. |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 3409 | Value *CodeGenFunction::EmitComplexToScalarConversion(ComplexPairTy Src, |
| 3410 | QualType SrcTy, |
| 3411 | QualType DstTy) { |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 3412 | assert(SrcTy->isAnyComplexType() && hasScalarEvaluationKind(DstTy) && |
Chris Lattner | 4f1a7b3 | 2007-08-26 16:34:22 +0000 | [diff] [blame] | 3413 | "Invalid complex -> scalar conversion"); |
| 3414 | return ScalarExprEmitter(*this).EmitComplexToScalarConversion(Src, SrcTy, |
| 3415 | DstTy); |
| 3416 | } |
Anders Carlsson | cc23aca | 2007-12-10 19:35:18 +0000 | [diff] [blame] | 3417 | |
Chris Lattner | 8c11a65 | 2010-06-26 22:09:34 +0000 | [diff] [blame] | 3418 | |
| 3419 | llvm::Value *CodeGenFunction:: |
| 3420 | EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV, |
| 3421 | bool isInc, bool isPre) { |
| 3422 | return ScalarExprEmitter(*this).EmitScalarPrePostIncDec(E, LV, isInc, isPre); |
| 3423 | } |
| 3424 | |
Fariborz Jahanian | 820bca4 | 2009-12-09 23:35:29 +0000 | [diff] [blame] | 3425 | LValue CodeGenFunction::EmitObjCIsaExpr(const ObjCIsaExpr *E) { |
| 3426 | llvm::Value *V; |
| 3427 | // object->isa or (*object).isa |
| 3428 | // Generate code as for: *(Class*)object |
Fariborz Jahanian | 820bca4 | 2009-12-09 23:35:29 +0000 | [diff] [blame] | 3429 | // build Class* type |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3430 | llvm::Type *ClassPtrTy = ConvertType(E->getType()); |
Fariborz Jahanian | 5ed676c | 2010-02-05 19:18:30 +0000 | [diff] [blame] | 3431 | |
| 3432 | Expr *BaseExpr = E->getBase(); |
John McCall | 7eb0a9e | 2010-11-24 05:12:34 +0000 | [diff] [blame] | 3433 | if (BaseExpr->isRValue()) { |
Eli Friedman | d71f442 | 2011-12-19 23:03:09 +0000 | [diff] [blame] | 3434 | V = CreateMemTemp(E->getType(), "resval"); |
Fariborz Jahanian | 5ed676c | 2010-02-05 19:18:30 +0000 | [diff] [blame] | 3435 | llvm::Value *Src = EmitScalarExpr(BaseExpr); |
| 3436 | Builder.CreateStore(Src, V); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 3437 | V = ScalarExprEmitter(*this).EmitLoadOfLValue( |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 3438 | MakeNaturalAlignAddrLValue(V, E->getType()), E->getExprLoc()); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 3439 | } else { |
| 3440 | if (E->isArrow()) |
| 3441 | V = ScalarExprEmitter(*this).EmitLoadOfLValue(BaseExpr); |
| 3442 | else |
| 3443 | V = EmitLValue(BaseExpr).getAddress(); |
Fariborz Jahanian | 5ed676c | 2010-02-05 19:18:30 +0000 | [diff] [blame] | 3444 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3445 | |
Fariborz Jahanian | 5ed676c | 2010-02-05 19:18:30 +0000 | [diff] [blame] | 3446 | // build Class* type |
Fariborz Jahanian | 820bca4 | 2009-12-09 23:35:29 +0000 | [diff] [blame] | 3447 | ClassPtrTy = ClassPtrTy->getPointerTo(); |
| 3448 | V = Builder.CreateBitCast(V, ClassPtrTy); |
Eli Friedman | d71f442 | 2011-12-19 23:03:09 +0000 | [diff] [blame] | 3449 | return MakeNaturalAlignAddrLValue(V, E->getType()); |
Fariborz Jahanian | 820bca4 | 2009-12-09 23:35:29 +0000 | [diff] [blame] | 3450 | } |
| 3451 | |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 3452 | |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 3453 | LValue CodeGenFunction::EmitCompoundAssignmentLValue( |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 3454 | const CompoundAssignOperator *E) { |
| 3455 | ScalarExprEmitter Scalar(*this); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 3456 | Value *Result = nullptr; |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 3457 | switch (E->getOpcode()) { |
| 3458 | #define COMPOUND_OP(Op) \ |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 3459 | case BO_##Op##Assign: \ |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 3460 | return Scalar.EmitCompoundAssignLValue(E, &ScalarExprEmitter::Emit##Op, \ |
Daniel Dunbar | d7f7d08 | 2010-06-29 22:00:45 +0000 | [diff] [blame] | 3461 | Result) |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 3462 | COMPOUND_OP(Mul); |
| 3463 | COMPOUND_OP(Div); |
| 3464 | COMPOUND_OP(Rem); |
| 3465 | COMPOUND_OP(Add); |
| 3466 | COMPOUND_OP(Sub); |
| 3467 | COMPOUND_OP(Shl); |
| 3468 | COMPOUND_OP(Shr); |
| 3469 | COMPOUND_OP(And); |
| 3470 | COMPOUND_OP(Xor); |
| 3471 | COMPOUND_OP(Or); |
| 3472 | #undef COMPOUND_OP |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3473 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 3474 | case BO_PtrMemD: |
| 3475 | case BO_PtrMemI: |
| 3476 | case BO_Mul: |
| 3477 | case BO_Div: |
| 3478 | case BO_Rem: |
| 3479 | case BO_Add: |
| 3480 | case BO_Sub: |
| 3481 | case BO_Shl: |
| 3482 | case BO_Shr: |
| 3483 | case BO_LT: |
| 3484 | case BO_GT: |
| 3485 | case BO_LE: |
| 3486 | case BO_GE: |
| 3487 | case BO_EQ: |
| 3488 | case BO_NE: |
| 3489 | case BO_And: |
| 3490 | case BO_Xor: |
| 3491 | case BO_Or: |
| 3492 | case BO_LAnd: |
| 3493 | case BO_LOr: |
| 3494 | case BO_Assign: |
| 3495 | case BO_Comma: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 3496 | llvm_unreachable("Not valid compound assignment operators"); |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 3497 | } |
Craig Topper | d10e5c2 | 2013-07-26 06:16:11 +0000 | [diff] [blame] | 3498 | |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 3499 | llvm_unreachable("Unhandled compound assignment operator"); |
| 3500 | } |