Chris Lattner | bed3144 | 2007-05-28 01:07:47 +0000 | [diff] [blame] | 1 | //===--- CodeGenFunction.cpp - Emit LLVM Code from ASTs for a Function ----===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 5b12ab8 | 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 | bed3144 | 2007-05-28 01:07:47 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This coordinates the per-function state used while generating code. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "CodeGenFunction.h" |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 15 | #include "CGBlocks.h" |
David Majnemer | dc012fa | 2015-04-22 21:38:15 +0000 | [diff] [blame] | 16 | #include "CGCleanup.h" |
Peter Collingbourne | fa4d603 | 2011-10-06 18:51:56 +0000 | [diff] [blame] | 17 | #include "CGCUDARuntime.h" |
John McCall | 5d865c32 | 2010-08-31 07:33:07 +0000 | [diff] [blame] | 18 | #include "CGCXXABI.h" |
Eli Friedman | 1763075 | 2008-05-22 01:40:10 +0000 | [diff] [blame] | 19 | #include "CGDebugInfo.h" |
Alexey Bataev | 9959db5 | 2014-05-06 10:08:46 +0000 | [diff] [blame] | 20 | #include "CGOpenMPRuntime.h" |
Chandler Carruth | 3a02247 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 21 | #include "CodeGenModule.h" |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 22 | #include "CodeGenPGO.h" |
Peter Collingbourne | b453cd6 | 2013-10-20 21:29:19 +0000 | [diff] [blame] | 23 | #include "TargetInfo.h" |
Daniel Dunbar | ad319a7 | 2008-08-11 05:00:27 +0000 | [diff] [blame] | 24 | #include "clang/AST/ASTContext.h" |
Daniel Dunbar | 6e8aa53 | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 25 | #include "clang/AST/Decl.h" |
Anders Carlsson | 468fa63 | 2009-04-04 20:47:02 +0000 | [diff] [blame] | 26 | #include "clang/AST/DeclCXX.h" |
Mike Stump | bee78dd | 2009-12-04 23:26:17 +0000 | [diff] [blame] | 27 | #include "clang/AST/StmtCXX.h" |
Sanjay Patel | a24296b | 2015-09-02 20:01:30 +0000 | [diff] [blame] | 28 | #include "clang/Basic/Builtins.h" |
Chandler Carruth | 3a02247 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 29 | #include "clang/Basic/TargetInfo.h" |
Mark Lacey | a8e7df3 | 2013-10-30 21:53:58 +0000 | [diff] [blame] | 30 | #include "clang/CodeGen/CGFunctionInfo.h" |
Chris Lattner | 3c77a35 | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 31 | #include "clang/Frontend/CodeGenOptions.h" |
Eric Christopher | fbfd97e | 2015-11-12 00:44:07 +0000 | [diff] [blame] | 32 | #include "clang/Sema/SemaDiagnostic.h" |
Chandler Carruth | ffd5551 | 2013-01-02 11:45:17 +0000 | [diff] [blame] | 33 | #include "llvm/IR/DataLayout.h" |
| 34 | #include "llvm/IR/Intrinsics.h" |
| 35 | #include "llvm/IR/MDBuilder.h" |
| 36 | #include "llvm/IR/Operator.h" |
Chris Lattner | bed3144 | 2007-05-28 01:07:47 +0000 | [diff] [blame] | 37 | using namespace clang; |
| 38 | using namespace CodeGen; |
| 39 | |
Fariborz Jahanian | 6362803 | 2012-06-26 16:06:38 +0000 | [diff] [blame] | 40 | CodeGenFunction::CodeGenFunction(CodeGenModule &cgm, bool suppressNewContext) |
David Blaikie | 92848de | 2013-08-26 20:33:21 +0000 | [diff] [blame] | 41 | : CodeGenTypeCache(cgm), CGM(cgm), Target(cgm.getTarget()), |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 42 | Builder(cgm, cgm.getModule().getContext(), llvm::ConstantFolder(), |
David Blaikie | 8e90d22 | 2014-10-14 17:09:38 +0000 | [diff] [blame] | 43 | CGBuilderInserterTy(this)), |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 44 | CurFn(nullptr), ReturnValue(Address::invalid()), |
| 45 | CapturedStmtInfo(nullptr), |
Alexey Samsonov | 035462c | 2014-10-30 19:33:44 +0000 | [diff] [blame] | 46 | SanOpts(CGM.getLangOpts().Sanitize), IsSanitizerScope(false), |
David Blaikie | 8e90d22 | 2014-10-14 17:09:38 +0000 | [diff] [blame] | 47 | CurFuncIsThunk(false), AutoreleaseResult(false), SawAsmBlock(false), |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 48 | IsOutlinedSEHHelper(false), |
| 49 | BlockInfo(nullptr), BlockPointer(nullptr), |
Reid Kleckner | 1981944 | 2014-07-25 21:39:46 +0000 | [diff] [blame] | 50 | LambdaThisCaptureField(nullptr), NormalCleanupDest(nullptr), |
| 51 | NextCleanupDestIndex(1), FirstBlockInfo(nullptr), EHResumeBlock(nullptr), |
Reid Kleckner | aca01db | 2015-02-04 22:37:07 +0000 | [diff] [blame] | 52 | ExceptionSlot(nullptr), EHSelectorSlot(nullptr), |
Reid Kleckner | 9fe7f23 | 2015-07-07 00:36:30 +0000 | [diff] [blame] | 53 | DebugInfo(CGM.getModuleDebugInfo()), |
| 54 | DisableDebugInfo(false), DidCallStackSave(false), IndirectBranch(nullptr), |
| 55 | PGO(cgm), SwitchInsn(nullptr), SwitchWeights(nullptr), |
| 56 | CaseRangeBlock(nullptr), UnreachableBlock(nullptr), NumReturnExprs(0), |
| 57 | NumSimpleReturnExprs(0), CXXABIThisDecl(nullptr), |
| 58 | CXXABIThisValue(nullptr), CXXThisValue(nullptr), |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 59 | CXXStructorImplicitParamDecl(nullptr), |
Craig Topper | 8a13c41 | 2014-05-21 05:09:00 +0000 | [diff] [blame] | 60 | CXXStructorImplicitParamValue(nullptr), OutermostConditional(nullptr), |
| 61 | CurLexicalScope(nullptr), TerminateLandingPad(nullptr), |
| 62 | TerminateHandler(nullptr), TrapBB(nullptr) { |
Fariborz Jahanian | 6362803 | 2012-06-26 16:06:38 +0000 | [diff] [blame] | 63 | if (!suppressNewContext) |
| 64 | CGM.getCXXABI().getMangleContext().startNewFunction(); |
Michael Ilseman | 7a167ee | 2012-12-04 00:36:06 +0000 | [diff] [blame] | 65 | |
| 66 | llvm::FastMathFlags FMF; |
| 67 | if (CGM.getLangOpts().FastMath) |
Benjamin Kramer | 7464efc | 2012-12-09 21:58:24 +0000 | [diff] [blame] | 68 | FMF.setUnsafeAlgebra(); |
Michael Ilseman | 7a167ee | 2012-12-04 00:36:06 +0000 | [diff] [blame] | 69 | if (CGM.getLangOpts().FiniteMathOnly) { |
Benjamin Kramer | 7464efc | 2012-12-09 21:58:24 +0000 | [diff] [blame] | 70 | FMF.setNoNaNs(); |
| 71 | FMF.setNoInfs(); |
Michael Ilseman | 7a167ee | 2012-12-04 00:36:06 +0000 | [diff] [blame] | 72 | } |
Pekka Jaaskelainen | 3701450 | 2014-12-10 16:41:14 +0000 | [diff] [blame] | 73 | if (CGM.getCodeGenOpts().NoNaNsFPMath) { |
| 74 | FMF.setNoNaNs(); |
| 75 | } |
| 76 | if (CGM.getCodeGenOpts().NoSignedZeros) { |
| 77 | FMF.setNoSignedZeros(); |
| 78 | } |
Sanjay Patel | 359b105 | 2015-04-09 15:03:23 +0000 | [diff] [blame] | 79 | if (CGM.getCodeGenOpts().ReciprocalMath) { |
| 80 | FMF.setAllowReciprocal(); |
| 81 | } |
Michael Ilseman | 7a167ee | 2012-12-04 00:36:06 +0000 | [diff] [blame] | 82 | Builder.SetFastMathFlags(FMF); |
Chris Lattner | 5696e7b | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 83 | } |
Chris Lattner | d1af2d2 | 2007-05-29 23:17:50 +0000 | [diff] [blame] | 84 | |
John McCall | 08ef466 | 2011-11-10 08:15:53 +0000 | [diff] [blame] | 85 | CodeGenFunction::~CodeGenFunction() { |
Richard Smith | 736a947 | 2013-06-12 20:42:33 +0000 | [diff] [blame] | 86 | assert(LifetimeExtendedCleanupStack.empty() && "failed to emit a cleanup"); |
| 87 | |
John McCall | 08ef466 | 2011-11-10 08:15:53 +0000 | [diff] [blame] | 88 | // If there are any unclaimed block infos, go ahead and destroy them |
| 89 | // now. This can happen if IR-gen gets clever and skips evaluating |
| 90 | // something. |
| 91 | if (FirstBlockInfo) |
| 92 | destroyBlockInfos(FirstBlockInfo); |
Alexey Bataev | 9959db5 | 2014-05-06 10:08:46 +0000 | [diff] [blame] | 93 | |
| 94 | if (getLangOpts().OpenMP) { |
Alexey Bataev | 3eff5f4 | 2015-02-25 08:32:46 +0000 | [diff] [blame] | 95 | CGM.getOpenMPRuntime().functionFinished(*this); |
Alexey Bataev | 9959db5 | 2014-05-06 10:08:46 +0000 | [diff] [blame] | 96 | } |
John McCall | 08ef466 | 2011-11-10 08:15:53 +0000 | [diff] [blame] | 97 | } |
| 98 | |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 99 | CharUnits CodeGenFunction::getNaturalPointeeTypeAlignment(QualType T, |
| 100 | AlignmentSource *Source) { |
| 101 | return getNaturalTypeAlignment(T->getPointeeType(), Source, |
| 102 | /*forPointee*/ true); |
David Majnemer | 9928106 | 2014-09-18 22:05:54 +0000 | [diff] [blame] | 103 | } |
Chris Lattner | d1af2d2 | 2007-05-29 23:17:50 +0000 | [diff] [blame] | 104 | |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 105 | CharUnits CodeGenFunction::getNaturalTypeAlignment(QualType T, |
| 106 | AlignmentSource *Source, |
| 107 | bool forPointeeType) { |
| 108 | // Honor alignment typedef attributes even on incomplete types. |
| 109 | // We also honor them straight for C++ class types, even as pointees; |
| 110 | // there's an expressivity gap here. |
| 111 | if (auto TT = T->getAs<TypedefType>()) { |
| 112 | if (auto Align = TT->getDecl()->getMaxAlignment()) { |
| 113 | if (Source) *Source = AlignmentSource::AttributedType; |
| 114 | return getContext().toCharUnitsFromBits(Align); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | if (Source) *Source = AlignmentSource::Type; |
| 119 | |
| 120 | CharUnits Alignment; |
David Majnemer | 9df5637 | 2015-09-10 21:52:00 +0000 | [diff] [blame] | 121 | if (T->isIncompleteType()) { |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 122 | Alignment = CharUnits::One(); // Shouldn't be used, but pessimistic is best. |
| 123 | } else { |
| 124 | // For C++ class pointees, we don't know whether we're pointing at a |
| 125 | // base or a complete object, so we generally need to use the |
| 126 | // non-virtual alignment. |
| 127 | const CXXRecordDecl *RD; |
| 128 | if (forPointeeType && (RD = T->getAsCXXRecordDecl())) { |
| 129 | Alignment = CGM.getClassPointerAlignment(RD); |
| 130 | } else { |
| 131 | Alignment = getContext().getTypeAlignInChars(T); |
| 132 | } |
| 133 | |
| 134 | // Cap to the global maximum type alignment unless the alignment |
| 135 | // was somehow explicit on the type. |
| 136 | if (unsigned MaxAlign = getLangOpts().MaxTypeAlign) { |
| 137 | if (Alignment.getQuantity() > MaxAlign && |
| 138 | !getContext().isAlignmentRequired(T)) |
| 139 | Alignment = CharUnits::fromQuantity(MaxAlign); |
| 140 | } |
| 141 | } |
| 142 | return Alignment; |
| 143 | } |
| 144 | |
| 145 | LValue CodeGenFunction::MakeNaturalAlignAddrLValue(llvm::Value *V, QualType T) { |
| 146 | AlignmentSource AlignSource; |
| 147 | CharUnits Alignment = getNaturalTypeAlignment(T, &AlignSource); |
| 148 | return LValue::MakeAddr(Address(V, Alignment), T, getContext(), AlignSource, |
| 149 | CGM.getTBAAInfo(T)); |
| 150 | } |
| 151 | |
| 152 | /// Given a value of type T* that may not be to a complete object, |
| 153 | /// construct an l-value with the natural pointee alignment of T. |
| 154 | LValue |
| 155 | CodeGenFunction::MakeNaturalAlignPointeeAddrLValue(llvm::Value *V, QualType T) { |
| 156 | AlignmentSource AlignSource; |
| 157 | CharUnits Align = getNaturalTypeAlignment(T, &AlignSource, /*pointee*/ true); |
| 158 | return MakeAddrLValue(Address(V, Align), T, AlignSource); |
| 159 | } |
| 160 | |
| 161 | |
Chris Lattner | a5f58b0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 162 | llvm::Type *CodeGenFunction::ConvertTypeForMem(QualType T) { |
Daniel Dunbar | ee3da87 | 2009-02-03 23:03:55 +0000 | [diff] [blame] | 163 | return CGM.getTypes().ConvertTypeForMem(T); |
| 164 | } |
| 165 | |
Chris Lattner | a5f58b0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 166 | llvm::Type *CodeGenFunction::ConvertType(QualType T) { |
Chris Lattner | f033c14 | 2007-06-22 19:05:19 +0000 | [diff] [blame] | 167 | return CGM.getTypes().ConvertType(T); |
Chris Lattner | 45bb914 | 2007-06-09 02:28:57 +0000 | [diff] [blame] | 168 | } |
Chris Lattner | d1af2d2 | 2007-05-29 23:17:50 +0000 | [diff] [blame] | 169 | |
John McCall | 47fb950 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 170 | TypeEvaluationKind CodeGenFunction::getEvaluationKind(QualType type) { |
| 171 | type = type.getCanonicalType(); |
| 172 | while (true) { |
| 173 | switch (type->getTypeClass()) { |
John McCall | 745ae28 | 2011-05-15 02:34:36 +0000 | [diff] [blame] | 174 | #define TYPE(name, parent) |
| 175 | #define ABSTRACT_TYPE(name, parent) |
| 176 | #define NON_CANONICAL_TYPE(name, parent) case Type::name: |
| 177 | #define DEPENDENT_TYPE(name, parent) case Type::name: |
| 178 | #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(name, parent) case Type::name: |
| 179 | #include "clang/AST/TypeNodes.def" |
John McCall | 47fb950 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 180 | llvm_unreachable("non-canonical or dependent type in IR-generation"); |
John McCall | 745ae28 | 2011-05-15 02:34:36 +0000 | [diff] [blame] | 181 | |
Richard Smith | 27d807c | 2013-04-30 13:56:41 +0000 | [diff] [blame] | 182 | case Type::Auto: |
| 183 | llvm_unreachable("undeduced auto type in IR-generation"); |
| 184 | |
John McCall | 47fb950 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 185 | // Various scalar types. |
| 186 | case Type::Builtin: |
| 187 | case Type::Pointer: |
| 188 | case Type::BlockPointer: |
| 189 | case Type::LValueReference: |
| 190 | case Type::RValueReference: |
| 191 | case Type::MemberPointer: |
| 192 | case Type::Vector: |
| 193 | case Type::ExtVector: |
| 194 | case Type::FunctionProto: |
| 195 | case Type::FunctionNoProto: |
| 196 | case Type::Enum: |
| 197 | case Type::ObjCObjectPointer: |
Xiuli Pan | 9c14e28 | 2016-01-09 12:53:17 +0000 | [diff] [blame] | 198 | case Type::Pipe: |
John McCall | 47fb950 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 199 | return TEK_Scalar; |
John McCall | 745ae28 | 2011-05-15 02:34:36 +0000 | [diff] [blame] | 200 | |
John McCall | 47fb950 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 201 | // Complexes. |
| 202 | case Type::Complex: |
| 203 | return TEK_Complex; |
Eli Friedman | 0dfb889 | 2011-10-06 23:00:33 +0000 | [diff] [blame] | 204 | |
John McCall | 47fb950 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 205 | // Arrays, records, and Objective-C objects. |
| 206 | case Type::ConstantArray: |
| 207 | case Type::IncompleteArray: |
| 208 | case Type::VariableArray: |
| 209 | case Type::Record: |
| 210 | case Type::ObjCObject: |
| 211 | case Type::ObjCInterface: |
| 212 | return TEK_Aggregate; |
| 213 | |
| 214 | // We operate on atomic values according to their underlying type. |
| 215 | case Type::Atomic: |
| 216 | type = cast<AtomicType>(type)->getValueType(); |
| 217 | continue; |
| 218 | } |
| 219 | llvm_unreachable("unknown type kind!"); |
John McCall | 745ae28 | 2011-05-15 02:34:36 +0000 | [diff] [blame] | 220 | } |
Chris Lattner | 54fb19e | 2007-06-22 22:02:34 +0000 | [diff] [blame] | 221 | } |
| 222 | |
David Blaikie | 66e4197 | 2015-01-14 07:38:27 +0000 | [diff] [blame] | 223 | llvm::DebugLoc CodeGenFunction::EmitReturnBlock() { |
Daniel Dunbar | fd346a3 | 2009-01-26 23:27:52 +0000 | [diff] [blame] | 224 | // For cleanliness, we try to avoid emitting the return block for |
| 225 | // simple cases. |
| 226 | llvm::BasicBlock *CurBB = Builder.GetInsertBlock(); |
| 227 | |
| 228 | if (CurBB) { |
| 229 | assert(!CurBB->getTerminator() && "Unexpected terminated block."); |
| 230 | |
Daniel Dunbar | ea3060a | 2009-07-19 08:24:34 +0000 | [diff] [blame] | 231 | // We have a valid insert point, reuse it if it is empty or there are no |
| 232 | // explicit jumps to the return block. |
John McCall | ad5d61e | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 233 | if (CurBB->empty() || ReturnBlock.getBlock()->use_empty()) { |
| 234 | ReturnBlock.getBlock()->replaceAllUsesWith(CurBB); |
| 235 | delete ReturnBlock.getBlock(); |
Daniel Dunbar | ea3060a | 2009-07-19 08:24:34 +0000 | [diff] [blame] | 236 | } else |
John McCall | ad5d61e | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 237 | EmitBlock(ReturnBlock.getBlock()); |
David Blaikie | 66e4197 | 2015-01-14 07:38:27 +0000 | [diff] [blame] | 238 | return llvm::DebugLoc(); |
Daniel Dunbar | fd346a3 | 2009-01-26 23:27:52 +0000 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | // Otherwise, if the return block is the target of a single direct |
| 242 | // branch then we can just put the code in that block instead. This |
| 243 | // cleans up functions which started with a unified return block. |
John McCall | ad5d61e | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 244 | if (ReturnBlock.getBlock()->hasOneUse()) { |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 245 | llvm::BranchInst *BI = |
Chandler Carruth | 4d01fff | 2014-03-09 03:16:50 +0000 | [diff] [blame] | 246 | dyn_cast<llvm::BranchInst>(*ReturnBlock.getBlock()->user_begin()); |
John McCall | bd30929 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 247 | if (BI && BI->isUnconditional() && |
John McCall | ad5d61e | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 248 | BI->getSuccessor(0) == ReturnBlock.getBlock()) { |
David Blaikie | 66e4197 | 2015-01-14 07:38:27 +0000 | [diff] [blame] | 249 | // Record/return the DebugLoc of the simple 'return' expression to be used |
| 250 | // later by the actual 'ret' instruction. |
| 251 | llvm::DebugLoc Loc = BI->getDebugLoc(); |
Daniel Dunbar | fd346a3 | 2009-01-26 23:27:52 +0000 | [diff] [blame] | 252 | Builder.SetInsertPoint(BI->getParent()); |
| 253 | BI->eraseFromParent(); |
John McCall | ad5d61e | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 254 | delete ReturnBlock.getBlock(); |
David Blaikie | 66e4197 | 2015-01-14 07:38:27 +0000 | [diff] [blame] | 255 | return Loc; |
Daniel Dunbar | fd346a3 | 2009-01-26 23:27:52 +0000 | [diff] [blame] | 256 | } |
| 257 | } |
| 258 | |
Mike Stump | 18bb928 | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 259 | // FIXME: We are at an unreachable point, there is no reason to emit the block |
| 260 | // unless it has uses. However, we still need a place to put the debug |
| 261 | // region.end for now. |
Daniel Dunbar | fd346a3 | 2009-01-26 23:27:52 +0000 | [diff] [blame] | 262 | |
John McCall | ad5d61e | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 263 | EmitBlock(ReturnBlock.getBlock()); |
David Blaikie | 66e4197 | 2015-01-14 07:38:27 +0000 | [diff] [blame] | 264 | return llvm::DebugLoc(); |
John McCall | bd30929 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | static void EmitIfUsed(CodeGenFunction &CGF, llvm::BasicBlock *BB) { |
| 268 | if (!BB) return; |
| 269 | if (!BB->use_empty()) |
| 270 | return CGF.CurFn->getBasicBlockList().push_back(BB); |
| 271 | delete BB; |
Daniel Dunbar | fd346a3 | 2009-01-26 23:27:52 +0000 | [diff] [blame] | 272 | } |
| 273 | |
Daniel Dunbar | 89654ee | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 274 | void CodeGenFunction::FinishFunction(SourceLocation EndLoc) { |
Chris Lattner | e73e432 | 2007-07-16 21:28:45 +0000 | [diff] [blame] | 275 | assert(BreakContinueStack.empty() && |
| 276 | "mismatched push/pop in break/continue stack!"); |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 277 | |
Adrian Prantl | 52bf3c4 | 2013-05-03 20:11:48 +0000 | [diff] [blame] | 278 | bool OnlySimpleReturnStmts = NumSimpleReturnExprs > 0 |
Adrian Prantl | 524ba1f | 2013-07-25 00:23:42 +0000 | [diff] [blame] | 279 | && NumSimpleReturnExprs == NumReturnExprs |
| 280 | && ReturnBlock.getBlock()->use_empty(); |
| 281 | // Usually the return expression is evaluated before the cleanup |
| 282 | // code. If the function contains only a simple return statement, |
| 283 | // such as a constant, the location before the cleanup code becomes |
| 284 | // the last useful breakpoint in the function, because the simple |
| 285 | // return expression will be evaluated after the cleanup code. To be |
| 286 | // safe, set the debug location for cleanup code to the location of |
| 287 | // the return statement. Otherwise the cleanup code should be at the |
| 288 | // end of the function's lexical scope. |
| 289 | // |
| 290 | // If there are multiple branches to the return block, the branch |
| 291 | // instructions will get the location of the return statements and |
| 292 | // all will be fine. |
Adrian Prantl | 3be1054 | 2013-05-02 17:30:20 +0000 | [diff] [blame] | 293 | if (CGDebugInfo *DI = getDebugInfo()) { |
Adrian Prantl | 52bf3c4 | 2013-05-03 20:11:48 +0000 | [diff] [blame] | 294 | if (OnlySimpleReturnStmts) |
Adrian Prantl | e83b130 | 2014-01-07 22:05:52 +0000 | [diff] [blame] | 295 | DI->EmitLocation(Builder, LastStopPoint); |
Adrian Prantl | 3be1054 | 2013-05-02 17:30:20 +0000 | [diff] [blame] | 296 | else |
Adrian Prantl | e83b130 | 2014-01-07 22:05:52 +0000 | [diff] [blame] | 297 | DI->EmitLocation(Builder, EndLoc); |
Adrian Prantl | 3be1054 | 2013-05-02 17:30:20 +0000 | [diff] [blame] | 298 | } |
David Blaikie | 357aafb | 2013-02-01 19:09:49 +0000 | [diff] [blame] | 299 | |
John McCall | 31168b0 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 300 | // Pop any cleanups that might have been associated with the |
| 301 | // parameters. Do this in whatever block we're currently in; it's |
| 302 | // important to do this before we enter the return block or return |
| 303 | // edges will be *really* confused. |
David Majnemer | dc012fa | 2015-04-22 21:38:15 +0000 | [diff] [blame] | 304 | bool HasCleanups = EHStack.stable_begin() != PrologueCleanupDepth; |
| 305 | bool HasOnlyLifetimeMarkers = |
| 306 | HasCleanups && EHStack.containsOnlyLifetimeMarkers(PrologueCleanupDepth); |
| 307 | bool EmitRetDbgLoc = !HasCleanups || HasOnlyLifetimeMarkers; |
| 308 | if (HasCleanups) { |
Adrian Prantl | 3be1054 | 2013-05-02 17:30:20 +0000 | [diff] [blame] | 309 | // Make sure the line table doesn't jump back into the body for |
| 310 | // the ret after it's been at EndLoc. |
Adrian Prantl | 3be1054 | 2013-05-02 17:30:20 +0000 | [diff] [blame] | 311 | if (CGDebugInfo *DI = getDebugInfo()) |
Adrian Prantl | 52bf3c4 | 2013-05-03 20:11:48 +0000 | [diff] [blame] | 312 | if (OnlySimpleReturnStmts) |
Adrian Prantl | e83b130 | 2014-01-07 22:05:52 +0000 | [diff] [blame] | 313 | DI->EmitLocation(Builder, EndLoc); |
David Blaikie | 4d52443 | 2015-02-04 19:47:54 +0000 | [diff] [blame] | 314 | |
| 315 | PopCleanupBlocks(PrologueCleanupDepth); |
Adrian Prantl | 3be1054 | 2013-05-02 17:30:20 +0000 | [diff] [blame] | 316 | } |
| 317 | |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 318 | // Emit function epilog (to return). |
David Blaikie | 66e4197 | 2015-01-14 07:38:27 +0000 | [diff] [blame] | 319 | llvm::DebugLoc Loc = EmitReturnBlock(); |
Daniel Dunbar | fab3f93 | 2008-11-11 20:59:54 +0000 | [diff] [blame] | 320 | |
Daniel Dunbar | 468a8f8 | 2011-02-10 17:32:22 +0000 | [diff] [blame] | 321 | if (ShouldInstrumentFunction()) |
| 322 | EmitFunctionInstrumentation("__cyg_profile_func_exit"); |
Chris Lattner | 3c77a35 | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 323 | |
Daniel Dunbar | fab3f93 | 2008-11-11 20:59:54 +0000 | [diff] [blame] | 324 | // Emit debug descriptor for function end. |
David Blaikie | 66e4197 | 2015-01-14 07:38:27 +0000 | [diff] [blame] | 325 | if (CGDebugInfo *DI = getDebugInfo()) |
Devang Patel | 0884a60 | 2010-07-22 22:29:16 +0000 | [diff] [blame] | 326 | DI->EmitFunctionEnd(Builder); |
Daniel Dunbar | fab3f93 | 2008-11-11 20:59:54 +0000 | [diff] [blame] | 327 | |
David Blaikie | 66e4197 | 2015-01-14 07:38:27 +0000 | [diff] [blame] | 328 | // Reset the debug location to that of the simple 'return' expression, if any |
| 329 | // rather than that of the end of the function's scope '}'. |
| 330 | ApplyDebugLocation AL(*this, Loc); |
Nick Lewycky | 2d84e84 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 331 | EmitFunctionEpilog(*CurFnInfo, EmitRetDbgLoc, EndLoc); |
Mike Stump | 1d84921 | 2009-12-07 23:38:24 +0000 | [diff] [blame] | 332 | EmitEndEHSpec(CurCodeDecl); |
Daniel Dunbar | 54bb193 | 2008-09-09 21:00:17 +0000 | [diff] [blame] | 333 | |
John McCall | bd30929 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 334 | assert(EHStack.empty() && |
| 335 | "did not remove all scopes from cleanup stack!"); |
| 336 | |
Chris Lattner | 6c4d255 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 337 | // If someone did an indirect goto, emit the indirect goto block at the end of |
| 338 | // the function. |
| 339 | if (IndirectBranch) { |
| 340 | EmitBlock(IndirectBranch->getParent()); |
| 341 | Builder.ClearInsertionPoint(); |
| 342 | } |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 343 | |
Reid Kleckner | 98cb8ba | 2015-07-07 22:26:07 +0000 | [diff] [blame] | 344 | // If some of our locals escaped, insert a call to llvm.localescape in the |
Reid Kleckner | 31a1bb0 | 2015-04-08 22:23:48 +0000 | [diff] [blame] | 345 | // entry block. |
| 346 | if (!EscapedLocals.empty()) { |
| 347 | // Invert the map from local to index into a simple vector. There should be |
| 348 | // no holes. |
| 349 | SmallVector<llvm::Value *, 4> EscapeArgs; |
| 350 | EscapeArgs.resize(EscapedLocals.size()); |
| 351 | for (auto &Pair : EscapedLocals) |
| 352 | EscapeArgs[Pair.second] = Pair.first; |
| 353 | llvm::Function *FrameEscapeFn = llvm::Intrinsic::getDeclaration( |
Reid Kleckner | 98cb8ba | 2015-07-07 22:26:07 +0000 | [diff] [blame] | 354 | &CGM.getModule(), llvm::Intrinsic::localescape); |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 355 | CGBuilderTy(*this, AllocaInsertPt).CreateCall(FrameEscapeFn, EscapeArgs); |
Reid Kleckner | 31a1bb0 | 2015-04-08 22:23:48 +0000 | [diff] [blame] | 356 | } |
| 357 | |
Chris Lattner | c48023b | 2007-12-02 06:32:24 +0000 | [diff] [blame] | 358 | // Remove the AllocaInsertPt instruction, which is just a convenience for us. |
Chris Lattner | 2739d2b | 2009-03-31 22:17:44 +0000 | [diff] [blame] | 359 | llvm::Instruction *Ptr = AllocaInsertPt; |
Craig Topper | 8a13c41 | 2014-05-21 05:09:00 +0000 | [diff] [blame] | 360 | AllocaInsertPt = nullptr; |
Chris Lattner | 2739d2b | 2009-03-31 22:17:44 +0000 | [diff] [blame] | 361 | Ptr->eraseFromParent(); |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 362 | |
Chris Lattner | 6c4d255 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 363 | // If someone took the address of a label but never did an indirect goto, we |
| 364 | // made a zero entry PHI node, which is illegal, zap it now. |
| 365 | if (IndirectBranch) { |
| 366 | llvm::PHINode *PN = cast<llvm::PHINode>(IndirectBranch->getAddress()); |
| 367 | if (PN->getNumIncomingValues() == 0) { |
| 368 | PN->replaceAllUsesWith(llvm::UndefValue::get(PN->getType())); |
| 369 | PN->eraseFromParent(); |
| 370 | } |
| 371 | } |
John McCall | bd30929 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 372 | |
John McCall | 8e4c74b | 2011-08-11 02:22:43 +0000 | [diff] [blame] | 373 | EmitIfUsed(*this, EHResumeBlock); |
John McCall | bd30929 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 374 | EmitIfUsed(*this, TerminateLandingPad); |
| 375 | EmitIfUsed(*this, TerminateHandler); |
| 376 | EmitIfUsed(*this, UnreachableBlock); |
John McCall | 09ae032 | 2010-07-06 23:57:41 +0000 | [diff] [blame] | 377 | |
| 378 | if (CGM.getCodeGenOpts().EmitDeclMetadata) |
| 379 | EmitDeclMetadata(); |
Reid Kleckner | 314ef7b | 2014-02-01 00:04:45 +0000 | [diff] [blame] | 380 | |
| 381 | for (SmallVectorImpl<std::pair<llvm::Instruction *, llvm::Value *> >::iterator |
| 382 | I = DeferredReplacements.begin(), |
| 383 | E = DeferredReplacements.end(); |
| 384 | I != E; ++I) { |
| 385 | I->first->replaceAllUsesWith(I->second); |
| 386 | I->first->eraseFromParent(); |
| 387 | } |
Chris Lattner | d1af2d2 | 2007-05-29 23:17:50 +0000 | [diff] [blame] | 388 | } |
Chris Lattner | 308f431 | 2007-05-29 23:50:05 +0000 | [diff] [blame] | 389 | |
Chris Lattner | 3c77a35 | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 390 | /// ShouldInstrumentFunction - Return true if the current function should be |
| 391 | /// instrumented with __cyg_profile_func_* calls |
| 392 | bool CodeGenFunction::ShouldInstrumentFunction() { |
| 393 | if (!CGM.getCodeGenOpts().InstrumentFunctions) |
| 394 | return false; |
Ted Kremenek | c249c41 | 2011-05-16 23:49:20 +0000 | [diff] [blame] | 395 | if (!CurFuncDecl || CurFuncDecl->hasAttr<NoInstrumentFunctionAttr>()) |
Chris Lattner | 3c77a35 | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 396 | return false; |
| 397 | return true; |
| 398 | } |
| 399 | |
| 400 | /// EmitFunctionInstrumentation - Emit LLVM code to call the specified |
| 401 | /// instrumentation function with the current function and the call site, if |
| 402 | /// function instrumentation is enabled. |
| 403 | void CodeGenFunction::EmitFunctionInstrumentation(const char *Fn) { |
Chris Lattner | b48a2d5 | 2010-06-23 05:21:28 +0000 | [diff] [blame] | 404 | // void __cyg_profile_func_{enter,exit} (void *this_fn, void *call_site); |
Chris Lattner | a5f58b0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 405 | llvm::PointerType *PointerTy = Int8PtrTy; |
| 406 | llvm::Type *ProfileFuncArgs[] = { PointerTy, PointerTy }; |
Chris Lattner | 2192fe5 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 407 | llvm::FunctionType *FunctionTy = |
Chris Lattner | ece0409 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 408 | llvm::FunctionType::get(VoidTy, ProfileFuncArgs, false); |
Chris Lattner | 3c77a35 | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 409 | |
| 410 | llvm::Constant *F = CGM.CreateRuntimeFunction(FunctionTy, Fn); |
| 411 | llvm::CallInst *CallSite = Builder.CreateCall( |
Benjamin Kramer | 8d375ce | 2011-07-14 17:45:50 +0000 | [diff] [blame] | 412 | CGM.getIntrinsic(llvm::Intrinsic::returnaddress), |
Chris Lattner | 5e016ae | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 413 | llvm::ConstantInt::get(Int32Ty, 0), |
Chris Lattner | 3c77a35 | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 414 | "callsite"); |
| 415 | |
John McCall | 882987f | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 416 | llvm::Value *args[] = { |
| 417 | llvm::ConstantExpr::getBitCast(CurFn, PointerTy), |
| 418 | CallSite |
| 419 | }; |
| 420 | |
| 421 | EmitNounwindRuntimeCall(F, args); |
Chris Lattner | 3c77a35 | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 422 | } |
| 423 | |
Roman Divacky | 178e0160 | 2011-02-10 16:52:03 +0000 | [diff] [blame] | 424 | void CodeGenFunction::EmitMCountInstrumentation() { |
Chris Lattner | ece0409 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 425 | llvm::FunctionType *FTy = llvm::FunctionType::get(VoidTy, false); |
Roman Divacky | 178e0160 | 2011-02-10 16:52:03 +0000 | [diff] [blame] | 426 | |
John McCall | c8e0170 | 2013-04-16 22:48:15 +0000 | [diff] [blame] | 427 | llvm::Constant *MCountFn = |
| 428 | CGM.CreateRuntimeFunction(FTy, getTarget().getMCountName()); |
John McCall | 882987f | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 429 | EmitNounwindRuntimeCall(MCountFn); |
Roman Divacky | 178e0160 | 2011-02-10 16:52:03 +0000 | [diff] [blame] | 430 | } |
| 431 | |
Tanya Lattner | 7445ada | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 432 | // OpenCL v1.2 s5.6.4.6 allows the compiler to store kernel argument |
| 433 | // information in the program executable. The argument information stored |
| 434 | // includes the argument name, its type, the address and access qualifiers used. |
Tanya Lattner | 7445ada | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 435 | static void GenOpenCLArgMetadata(const FunctionDecl *FD, llvm::Function *Fn, |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 436 | CodeGenModule &CGM, llvm::LLVMContext &Context, |
| 437 | SmallVector<llvm::Metadata *, 5> &kernelMDArgs, |
| 438 | CGBuilderTy &Builder, ASTContext &ASTCtx) { |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 439 | // Create MDNodes that represent the kernel arg metadata. |
Tanya Lattner | 7445ada | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 440 | // Each MDNode is a list in the form of "key", N number of values which is |
| 441 | // the same number of values as their are kernel arguments. |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 442 | |
Joey Gouly | 92a4744 | 2014-04-04 13:43:57 +0000 | [diff] [blame] | 443 | const PrintingPolicy &Policy = ASTCtx.getPrintingPolicy(); |
| 444 | |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 445 | // MDNode for the kernel argument address space qualifiers. |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 446 | SmallVector<llvm::Metadata *, 8> addressQuals; |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 447 | addressQuals.push_back(llvm::MDString::get(Context, "kernel_arg_addr_space")); |
| 448 | |
| 449 | // MDNode for the kernel argument access qualifiers (images only). |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 450 | SmallVector<llvm::Metadata *, 8> accessQuals; |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 451 | accessQuals.push_back(llvm::MDString::get(Context, "kernel_arg_access_qual")); |
| 452 | |
| 453 | // MDNode for the kernel argument type names. |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 454 | SmallVector<llvm::Metadata *, 8> argTypeNames; |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 455 | argTypeNames.push_back(llvm::MDString::get(Context, "kernel_arg_type")); |
| 456 | |
Fraser Cormack | dadc371 | 2014-07-30 14:39:53 +0000 | [diff] [blame] | 457 | // MDNode for the kernel argument base type names. |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 458 | SmallVector<llvm::Metadata *, 8> argBaseTypeNames; |
Fraser Cormack | dadc371 | 2014-07-30 14:39:53 +0000 | [diff] [blame] | 459 | argBaseTypeNames.push_back( |
| 460 | llvm::MDString::get(Context, "kernel_arg_base_type")); |
| 461 | |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 462 | // MDNode for the kernel argument type qualifiers. |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 463 | SmallVector<llvm::Metadata *, 8> argTypeQuals; |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 464 | argTypeQuals.push_back(llvm::MDString::get(Context, "kernel_arg_type_qual")); |
| 465 | |
Tanya Lattner | 7445ada | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 466 | // MDNode for the kernel argument names. |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 467 | SmallVector<llvm::Metadata *, 8> argNames; |
Tanya Lattner | 7445ada | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 468 | argNames.push_back(llvm::MDString::get(Context, "kernel_arg_name")); |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 469 | |
Tanya Lattner | 7445ada | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 470 | for (unsigned i = 0, e = FD->getNumParams(); i != e; ++i) { |
| 471 | const ParmVarDecl *parm = FD->getParamDecl(i); |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 472 | QualType ty = parm->getType(); |
| 473 | std::string typeQuals; |
| 474 | |
| 475 | if (ty->isPointerType()) { |
| 476 | QualType pointeeTy = ty->getPointeeType(); |
| 477 | |
| 478 | // Get address qualifier. |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 479 | addressQuals.push_back(llvm::ConstantAsMetadata::get(Builder.getInt32( |
| 480 | ASTCtx.getTargetAddressSpace(pointeeTy.getAddressSpace())))); |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 481 | |
| 482 | // Get argument type name. |
Joey Gouly | 92a4744 | 2014-04-04 13:43:57 +0000 | [diff] [blame] | 483 | std::string typeName = |
| 484 | pointeeTy.getUnqualifiedType().getAsString(Policy) + "*"; |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 485 | |
| 486 | // Turn "unsigned type" to "utype" |
| 487 | std::string::size_type pos = typeName.find("unsigned"); |
Fraser Cormack | 152493b | 2014-07-30 13:41:12 +0000 | [diff] [blame] | 488 | if (pointeeTy.isCanonical() && pos != std::string::npos) |
Benjamin Kramer | ef89ae0 | 2013-03-24 16:04:55 +0000 | [diff] [blame] | 489 | typeName.erase(pos+1, 8); |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 490 | |
| 491 | argTypeNames.push_back(llvm::MDString::get(Context, typeName)); |
| 492 | |
Fraser Cormack | dadc371 | 2014-07-30 14:39:53 +0000 | [diff] [blame] | 493 | std::string baseTypeName = |
| 494 | pointeeTy.getUnqualifiedType().getCanonicalType().getAsString( |
| 495 | Policy) + |
| 496 | "*"; |
| 497 | |
| 498 | // Turn "unsigned type" to "utype" |
| 499 | pos = baseTypeName.find("unsigned"); |
| 500 | if (pos != std::string::npos) |
| 501 | baseTypeName.erase(pos+1, 8); |
| 502 | |
| 503 | argBaseTypeNames.push_back(llvm::MDString::get(Context, baseTypeName)); |
| 504 | |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 505 | // Get argument type qualifiers: |
| 506 | if (ty.isRestrictQualified()) |
| 507 | typeQuals = "restrict"; |
| 508 | if (pointeeTy.isConstQualified() || |
| 509 | (pointeeTy.getAddressSpace() == LangAS::opencl_constant)) |
Benjamin Kramer | ef89ae0 | 2013-03-24 16:04:55 +0000 | [diff] [blame] | 510 | typeQuals += typeQuals.empty() ? "const" : " const"; |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 511 | if (pointeeTy.isVolatileQualified()) |
Benjamin Kramer | ef89ae0 | 2013-03-24 16:04:55 +0000 | [diff] [blame] | 512 | typeQuals += typeQuals.empty() ? "volatile" : " volatile"; |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 513 | } else { |
Pekka Jaaskelainen | 3587b32 | 2014-01-09 13:37:30 +0000 | [diff] [blame] | 514 | uint32_t AddrSpc = 0; |
Xiuli Pan | 9c14e28 | 2016-01-09 12:53:17 +0000 | [diff] [blame] | 515 | bool isPipe = ty->isPipeType(); |
| 516 | if (ty->isImageType() || isPipe) |
Pekka Jaaskelainen | 3587b32 | 2014-01-09 13:37:30 +0000 | [diff] [blame] | 517 | AddrSpc = |
| 518 | CGM.getContext().getTargetAddressSpace(LangAS::opencl_global); |
Bob Wilson | 95a27b0 | 2014-02-17 19:20:59 +0000 | [diff] [blame] | 519 | |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 520 | addressQuals.push_back( |
| 521 | llvm::ConstantAsMetadata::get(Builder.getInt32(AddrSpc))); |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 522 | |
| 523 | // Get argument type name. |
Xiuli Pan | 9c14e28 | 2016-01-09 12:53:17 +0000 | [diff] [blame] | 524 | std::string typeName; |
| 525 | if (isPipe) |
| 526 | typeName = cast<PipeType>(ty)->getElementType().getAsString(Policy); |
| 527 | else |
| 528 | typeName = ty.getUnqualifiedType().getAsString(Policy); |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 529 | |
| 530 | // Turn "unsigned type" to "utype" |
| 531 | std::string::size_type pos = typeName.find("unsigned"); |
Fraser Cormack | 152493b | 2014-07-30 13:41:12 +0000 | [diff] [blame] | 532 | if (ty.isCanonical() && pos != std::string::npos) |
Benjamin Kramer | ef89ae0 | 2013-03-24 16:04:55 +0000 | [diff] [blame] | 533 | typeName.erase(pos+1, 8); |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 534 | |
| 535 | argTypeNames.push_back(llvm::MDString::get(Context, typeName)); |
| 536 | |
Xiuli Pan | 9c14e28 | 2016-01-09 12:53:17 +0000 | [diff] [blame] | 537 | std::string baseTypeName; |
| 538 | if (isPipe) |
| 539 | baseTypeName = |
| 540 | cast<PipeType>(ty)->getElementType().getCanonicalType().getAsString(Policy); |
| 541 | else |
| 542 | baseTypeName = |
Fraser Cormack | dadc371 | 2014-07-30 14:39:53 +0000 | [diff] [blame] | 543 | ty.getUnqualifiedType().getCanonicalType().getAsString(Policy); |
| 544 | |
| 545 | // Turn "unsigned type" to "utype" |
| 546 | pos = baseTypeName.find("unsigned"); |
| 547 | if (pos != std::string::npos) |
| 548 | baseTypeName.erase(pos+1, 8); |
| 549 | |
| 550 | argBaseTypeNames.push_back(llvm::MDString::get(Context, baseTypeName)); |
| 551 | |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 552 | // Get argument type qualifiers: |
| 553 | if (ty.isConstQualified()) |
| 554 | typeQuals = "const"; |
| 555 | if (ty.isVolatileQualified()) |
Benjamin Kramer | ef89ae0 | 2013-03-24 16:04:55 +0000 | [diff] [blame] | 556 | typeQuals += typeQuals.empty() ? "volatile" : " volatile"; |
Xiuli Pan | 9c14e28 | 2016-01-09 12:53:17 +0000 | [diff] [blame] | 557 | if (isPipe) |
| 558 | typeQuals = "pipe"; |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 559 | } |
Justin Bogner | 0f06606 | 2013-11-22 10:20:40 +0000 | [diff] [blame] | 560 | |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 561 | argTypeQuals.push_back(llvm::MDString::get(Context, typeQuals)); |
| 562 | |
Xiuli Pan | 9c14e28 | 2016-01-09 12:53:17 +0000 | [diff] [blame] | 563 | // Get image and pipe access qualifier: |
| 564 | // FIXME: now image and pipe share the same access qualifier maybe we can |
| 565 | // refine it to OpenCL access qualifier and also handle write_read |
| 566 | if (ty->isImageType()|| ty->isPipeType()) { |
Aaron Ballman | c432799 | 2013-12-19 03:09:10 +0000 | [diff] [blame] | 567 | const OpenCLImageAccessAttr *A = parm->getAttr<OpenCLImageAccessAttr>(); |
Aaron Ballman | 2689133 | 2014-01-14 17:41:53 +0000 | [diff] [blame] | 568 | if (A && A->isWriteOnly()) |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 569 | accessQuals.push_back(llvm::MDString::get(Context, "write_only")); |
| 570 | else |
| 571 | accessQuals.push_back(llvm::MDString::get(Context, "read_only")); |
Aaron Ballman | 2689133 | 2014-01-14 17:41:53 +0000 | [diff] [blame] | 572 | // FIXME: what about read_write? |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 573 | } else |
| 574 | accessQuals.push_back(llvm::MDString::get(Context, "none")); |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 575 | |
Tanya Lattner | 7445ada | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 576 | // Get argument name. |
| 577 | argNames.push_back(llvm::MDString::get(Context, parm->getName())); |
Tanya Lattner | 7445ada | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 578 | } |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 579 | |
| 580 | kernelMDArgs.push_back(llvm::MDNode::get(Context, addressQuals)); |
| 581 | kernelMDArgs.push_back(llvm::MDNode::get(Context, accessQuals)); |
| 582 | kernelMDArgs.push_back(llvm::MDNode::get(Context, argTypeNames)); |
Fraser Cormack | dadc371 | 2014-07-30 14:39:53 +0000 | [diff] [blame] | 583 | kernelMDArgs.push_back(llvm::MDNode::get(Context, argBaseTypeNames)); |
Guy Benyei | fb36ede | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 584 | kernelMDArgs.push_back(llvm::MDNode::get(Context, argTypeQuals)); |
Sameer Sahasrabuddhe | c6093fe | 2014-12-04 05:30:58 +0000 | [diff] [blame] | 585 | if (CGM.getCodeGenOpts().EmitOpenCLArgMetadata) |
| 586 | kernelMDArgs.push_back(llvm::MDNode::get(Context, argNames)); |
Tanya Lattner | 7445ada | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 587 | } |
| 588 | |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 589 | void CodeGenFunction::EmitOpenCLKernelMetadata(const FunctionDecl *FD, |
Tanya Lattner | bcffcdf | 2012-07-09 22:06:01 +0000 | [diff] [blame] | 590 | llvm::Function *Fn) |
| 591 | { |
| 592 | if (!FD->hasAttr<OpenCLKernelAttr>()) |
| 593 | return; |
| 594 | |
| 595 | llvm::LLVMContext &Context = getLLVMContext(); |
| 596 | |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 597 | SmallVector<llvm::Metadata *, 5> kernelMDArgs; |
| 598 | kernelMDArgs.push_back(llvm::ConstantAsMetadata::get(Fn)); |
Tanya Lattner | bcffcdf | 2012-07-09 22:06:01 +0000 | [diff] [blame] | 599 | |
Sameer Sahasrabuddhe | c6093fe | 2014-12-04 05:30:58 +0000 | [diff] [blame] | 600 | GenOpenCLArgMetadata(FD, Fn, CGM, Context, kernelMDArgs, Builder, |
| 601 | getContext()); |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 602 | |
Aaron Ballman | c432799 | 2013-12-19 03:09:10 +0000 | [diff] [blame] | 603 | if (const VecTypeHintAttr *A = FD->getAttr<VecTypeHintAttr>()) { |
| 604 | QualType hintQTy = A->getTypeHint(); |
Joey Gouly | aba589c | 2013-03-08 09:42:32 +0000 | [diff] [blame] | 605 | const ExtVectorType *hintEltQTy = hintQTy->getAs<ExtVectorType>(); |
| 606 | bool isSignedInteger = |
| 607 | hintQTy->isSignedIntegerType() || |
| 608 | (hintEltQTy && hintEltQTy->getElementType()->isSignedIntegerType()); |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 609 | llvm::Metadata *attrMDArgs[] = { |
| 610 | llvm::MDString::get(Context, "vec_type_hint"), |
| 611 | llvm::ConstantAsMetadata::get(llvm::UndefValue::get( |
| 612 | CGM.getTypes().ConvertType(A->getTypeHint()))), |
| 613 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( |
| 614 | llvm::IntegerType::get(Context, 32), |
| 615 | llvm::APInt(32, (uint64_t)(isSignedInteger ? 1 : 0))))}; |
Joey Gouly | aba589c | 2013-03-08 09:42:32 +0000 | [diff] [blame] | 616 | kernelMDArgs.push_back(llvm::MDNode::get(Context, attrMDArgs)); |
| 617 | } |
| 618 | |
Aaron Ballman | c432799 | 2013-12-19 03:09:10 +0000 | [diff] [blame] | 619 | if (const WorkGroupSizeHintAttr *A = FD->getAttr<WorkGroupSizeHintAttr>()) { |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 620 | llvm::Metadata *attrMDArgs[] = { |
| 621 | llvm::MDString::get(Context, "work_group_size_hint"), |
| 622 | llvm::ConstantAsMetadata::get(Builder.getInt32(A->getXDim())), |
| 623 | llvm::ConstantAsMetadata::get(Builder.getInt32(A->getYDim())), |
| 624 | llvm::ConstantAsMetadata::get(Builder.getInt32(A->getZDim()))}; |
Tanya Lattner | bcffcdf | 2012-07-09 22:06:01 +0000 | [diff] [blame] | 625 | kernelMDArgs.push_back(llvm::MDNode::get(Context, attrMDArgs)); |
| 626 | } |
| 627 | |
Aaron Ballman | c432799 | 2013-12-19 03:09:10 +0000 | [diff] [blame] | 628 | if (const ReqdWorkGroupSizeAttr *A = FD->getAttr<ReqdWorkGroupSizeAttr>()) { |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 629 | llvm::Metadata *attrMDArgs[] = { |
| 630 | llvm::MDString::get(Context, "reqd_work_group_size"), |
| 631 | llvm::ConstantAsMetadata::get(Builder.getInt32(A->getXDim())), |
| 632 | llvm::ConstantAsMetadata::get(Builder.getInt32(A->getYDim())), |
| 633 | llvm::ConstantAsMetadata::get(Builder.getInt32(A->getZDim()))}; |
Tanya Lattner | bcffcdf | 2012-07-09 22:06:01 +0000 | [diff] [blame] | 634 | kernelMDArgs.push_back(llvm::MDNode::get(Context, attrMDArgs)); |
| 635 | } |
| 636 | |
| 637 | llvm::MDNode *kernelMDNode = llvm::MDNode::get(Context, kernelMDArgs); |
| 638 | llvm::NamedMDNode *OpenCLKernelMetadata = |
| 639 | CGM.getModule().getOrInsertNamedMetadata("opencl.kernels"); |
| 640 | OpenCLKernelMetadata->addOperand(kernelMDNode); |
| 641 | } |
| 642 | |
Adrian Prantl | 2cede0f | 2014-04-29 01:07:59 +0000 | [diff] [blame] | 643 | /// Determine whether the function F ends with a return stmt. |
| 644 | static bool endsWithReturn(const Decl* F) { |
| 645 | const Stmt *Body = nullptr; |
| 646 | if (auto *FD = dyn_cast_or_null<FunctionDecl>(F)) |
| 647 | Body = FD->getBody(); |
| 648 | else if (auto *OMD = dyn_cast_or_null<ObjCMethodDecl>(F)) |
| 649 | Body = OMD->getBody(); |
| 650 | |
| 651 | if (auto *CS = dyn_cast_or_null<CompoundStmt>(Body)) { |
| 652 | auto LastStmt = CS->body_rbegin(); |
| 653 | if (LastStmt != CS->body_rend()) |
| 654 | return isa<ReturnStmt>(*LastStmt); |
| 655 | } |
| 656 | return false; |
| 657 | } |
| 658 | |
John McCall | dec348f7 | 2013-05-03 07:33:41 +0000 | [diff] [blame] | 659 | void CodeGenFunction::StartFunction(GlobalDecl GD, |
| 660 | QualType RetTy, |
Daniel Dunbar | bc915f4 | 2008-09-09 23:14:03 +0000 | [diff] [blame] | 661 | llvm::Function *Fn, |
John McCall | a738c25 | 2011-03-09 04:27:21 +0000 | [diff] [blame] | 662 | const CGFunctionInfo &FnInfo, |
Daniel Dunbar | 354d278 | 2008-10-18 18:22:23 +0000 | [diff] [blame] | 663 | const FunctionArgList &Args, |
Adrian Prantl | 42d71b9 | 2014-04-10 23:21:53 +0000 | [diff] [blame] | 664 | SourceLocation Loc, |
Tilmann Scheller | 99cc30c | 2011-03-02 21:36:49 +0000 | [diff] [blame] | 665 | SourceLocation StartLoc) { |
David Blaikie | 8e6c36e | 2014-10-14 16:43:46 +0000 | [diff] [blame] | 666 | assert(!CurFn && |
| 667 | "Do not use a CodeGenFunction object for more than one function"); |
| 668 | |
Anders Carlsson | 73fcc95 | 2009-09-11 00:07:24 +0000 | [diff] [blame] | 669 | const Decl *D = GD.getDecl(); |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 670 | |
Anders Carlsson | f4478e9 | 2009-02-09 20:20:56 +0000 | [diff] [blame] | 671 | DidCallStackSave = false; |
John McCall | dec348f7 | 2013-05-03 07:33:41 +0000 | [diff] [blame] | 672 | CurCodeDecl = D; |
Craig Topper | 8a13c41 | 2014-05-21 05:09:00 +0000 | [diff] [blame] | 673 | CurFuncDecl = (D ? D->getNonClosureContext() : nullptr); |
Daniel Dunbar | bc915f4 | 2008-09-09 23:14:03 +0000 | [diff] [blame] | 674 | FnRetTy = RetTy; |
Daniel Dunbar | 9c42652 | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 675 | CurFn = Fn; |
John McCall | a738c25 | 2011-03-09 04:27:21 +0000 | [diff] [blame] | 676 | CurFnInfo = &FnInfo; |
Chris Lattner | 5696e7b | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 677 | assert(CurFn->isDeclaration() && "Function already has body?"); |
| 678 | |
Alexey Samsonov | 1444bb9 | 2014-10-17 00:20:19 +0000 | [diff] [blame] | 679 | if (CGM.isInSanitizerBlacklist(Fn, Loc)) |
Alexey Samsonov | 035462c | 2014-10-30 19:33:44 +0000 | [diff] [blame] | 680 | SanOpts.clear(); |
Will Dietz | f54319c | 2013-01-18 11:30:38 +0000 | [diff] [blame] | 681 | |
Peter Collingbourne | 915df99 | 2015-05-15 18:33:32 +0000 | [diff] [blame] | 682 | if (D) { |
| 683 | // Apply the no_sanitize* attributes to SanOpts. |
| 684 | for (auto Attr : D->specific_attrs<NoSanitizeAttr>()) |
| 685 | SanOpts.Mask &= ~Attr->getMask(); |
| 686 | } |
| 687 | |
| 688 | // Apply sanitizer attributes to the function. |
Alexander Potapenko | b9b73ef | 2015-06-19 12:19:07 +0000 | [diff] [blame] | 689 | if (SanOpts.hasOneOf(SanitizerKind::Address | SanitizerKind::KernelAddress)) |
Peter Collingbourne | 915df99 | 2015-05-15 18:33:32 +0000 | [diff] [blame] | 690 | Fn->addFnAttr(llvm::Attribute::SanitizeAddress); |
| 691 | if (SanOpts.has(SanitizerKind::Thread)) |
| 692 | Fn->addFnAttr(llvm::Attribute::SanitizeThread); |
| 693 | if (SanOpts.has(SanitizerKind::Memory)) |
| 694 | Fn->addFnAttr(llvm::Attribute::SanitizeMemory); |
Peter Collingbourne | c4122c1 | 2015-06-15 21:08:13 +0000 | [diff] [blame] | 695 | if (SanOpts.has(SanitizerKind::SafeStack)) |
| 696 | Fn->addFnAttr(llvm::Attribute::SafeStack); |
Peter Collingbourne | 915df99 | 2015-05-15 18:33:32 +0000 | [diff] [blame] | 697 | |
Jakob Stoklund Olesen | 819e54b | 2010-02-09 00:10:00 +0000 | [diff] [blame] | 698 | // Pass inline keyword to optimizer if it appears explicitly on any |
Roman Divacky | dd9bfb2 | 2014-01-15 19:07:16 +0000 | [diff] [blame] | 699 | // declaration. Also, in the case of -fno-inline attach NoInline |
David Majnemer | 19d7d54 | 2014-02-25 10:51:14 +0000 | [diff] [blame] | 700 | // attribute to all function that are not marked AlwaysInline. |
Roman Divacky | dd9bfb2 | 2014-01-15 19:07:16 +0000 | [diff] [blame] | 701 | if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D)) { |
| 702 | if (!CGM.getCodeGenOpts().NoInline) { |
Aaron Ballman | 86c9390 | 2014-03-06 23:45:36 +0000 | [diff] [blame] | 703 | for (auto RI : FD->redecls()) |
Chad Rosier | 883b257 | 2012-03-14 23:32:11 +0000 | [diff] [blame] | 704 | if (RI->isInlineSpecified()) { |
Bill Wendling | 207f053 | 2012-12-20 19:27:06 +0000 | [diff] [blame] | 705 | Fn->addFnAttr(llvm::Attribute::InlineHint); |
Chad Rosier | 883b257 | 2012-03-14 23:32:11 +0000 | [diff] [blame] | 706 | break; |
| 707 | } |
David Majnemer | 67e541e1c | 2014-02-25 09:53:29 +0000 | [diff] [blame] | 708 | } else if (!FD->hasAttr<AlwaysInlineAttr>()) |
Roman Divacky | dd9bfb2 | 2014-01-15 19:07:16 +0000 | [diff] [blame] | 709 | Fn->addFnAttr(llvm::Attribute::NoInline); |
| 710 | } |
Jakob Stoklund Olesen | 819e54b | 2010-02-09 00:10:00 +0000 | [diff] [blame] | 711 | |
Richard Smith | 9c6890a | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 712 | if (getLangOpts().OpenCL) { |
Peter Collingbourne | 7ce13fc | 2011-02-14 01:42:53 +0000 | [diff] [blame] | 713 | // Add metadata for a kernel function. |
| 714 | if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D)) |
Tanya Lattner | bcffcdf | 2012-07-09 22:06:01 +0000 | [diff] [blame] | 715 | EmitOpenCLKernelMetadata(FD, Fn); |
Peter Collingbourne | 7ce13fc | 2011-02-14 01:42:53 +0000 | [diff] [blame] | 716 | } |
| 717 | |
Peter Collingbourne | b453cd6 | 2013-10-20 21:29:19 +0000 | [diff] [blame] | 718 | // If we are checking function types, emit a function type signature as |
Peter Collingbourne | 1a0a9a3 | 2014-12-03 02:08:51 +0000 | [diff] [blame] | 719 | // prologue data. |
Alexey Samsonov | edf99a9 | 2014-11-07 22:29:38 +0000 | [diff] [blame] | 720 | if (getLangOpts().CPlusPlus && SanOpts.has(SanitizerKind::Function)) { |
Peter Collingbourne | b453cd6 | 2013-10-20 21:29:19 +0000 | [diff] [blame] | 721 | if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D)) { |
Peter Collingbourne | 1a0a9a3 | 2014-12-03 02:08:51 +0000 | [diff] [blame] | 722 | if (llvm::Constant *PrologueSig = |
Peter Collingbourne | b453cd6 | 2013-10-20 21:29:19 +0000 | [diff] [blame] | 723 | CGM.getTargetCodeGenInfo().getUBSanFunctionSignature(CGM)) { |
| 724 | llvm::Constant *FTRTTIConst = |
| 725 | CGM.GetAddrOfRTTIDescriptor(FD->getType(), /*ForEH=*/true); |
Peter Collingbourne | 1a0a9a3 | 2014-12-03 02:08:51 +0000 | [diff] [blame] | 726 | llvm::Constant *PrologueStructElems[] = { PrologueSig, FTRTTIConst }; |
| 727 | llvm::Constant *PrologueStructConst = |
| 728 | llvm::ConstantStruct::getAnon(PrologueStructElems, /*Packed=*/true); |
| 729 | Fn->setPrologueData(PrologueStructConst); |
Peter Collingbourne | b453cd6 | 2013-10-20 21:29:19 +0000 | [diff] [blame] | 730 | } |
| 731 | } |
| 732 | } |
| 733 | |
James Molloy | c16a60b6 | 2015-11-12 15:36:04 +0000 | [diff] [blame] | 734 | // If we're in C++ mode and the function name is "main", it is guaranteed |
| 735 | // to be norecurse by the standard (3.6.1.3 "The function main shall not be |
| 736 | // used within a program"). |
| 737 | if (getLangOpts().CPlusPlus) |
| 738 | if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D)) |
| 739 | if (FD->isMain()) |
| 740 | Fn->addFnAttr(llvm::Attribute::NoRecurse); |
| 741 | |
Daniel Dunbar | 75283ff | 2008-11-11 02:29:29 +0000 | [diff] [blame] | 742 | llvm::BasicBlock *EntryBB = createBasicBlock("entry", CurFn); |
Daniel Dunbar | 54bb193 | 2008-09-09 21:00:17 +0000 | [diff] [blame] | 743 | |
Chris Lattner | 5696e7b | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 744 | // Create a marker to make it easy to insert allocas into the entryblock |
| 745 | // later. Don't create this with the builder, because we don't want it |
| 746 | // folded. |
Chris Lattner | 5e016ae | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 747 | llvm::Value *Undef = llvm::UndefValue::get(Int32Ty); |
| 748 | AllocaInsertPt = new llvm::BitCastInst(Undef, Int32Ty, "", EntryBB); |
Chris Lattner | 4764022 | 2009-03-22 00:24:14 +0000 | [diff] [blame] | 749 | if (Builder.isNamePreserving()) |
| 750 | AllocaInsertPt->setName("allocapt"); |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 751 | |
John McCall | bd30929 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 752 | ReturnBlock = getJumpDestInCurrentScope("return"); |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 753 | |
Chris Lattner | 5696e7b | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 754 | Builder.SetInsertPoint(EntryBB); |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 755 | |
Sanjiv Gupta | 1e8b608 | 2008-07-04 11:04:26 +0000 | [diff] [blame] | 756 | // Emit subprogram debug descriptor. |
Anders Carlsson | 63784f4 | 2009-02-13 08:11:52 +0000 | [diff] [blame] | 757 | if (CGDebugInfo *DI = getDebugInfo()) { |
Jordan Rose | 5c38272 | 2013-03-08 21:51:21 +0000 | [diff] [blame] | 758 | SmallVector<QualType, 16> ArgTypes; |
Eric Christopher | 4b4beb2 | 2011-10-21 23:30:10 +0000 | [diff] [blame] | 759 | for (FunctionArgList::const_iterator i = Args.begin(), e = Args.end(); |
| 760 | i != e; ++i) { |
Jordan Rose | 5c38272 | 2013-03-08 21:51:21 +0000 | [diff] [blame] | 761 | ArgTypes.push_back((*i)->getType()); |
Eric Christopher | 4b4beb2 | 2011-10-21 23:30:10 +0000 | [diff] [blame] | 762 | } |
| 763 | |
John McCall | db40c7f | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 764 | QualType FnType = |
Jordan Rose | 5c38272 | 2013-03-08 21:51:21 +0000 | [diff] [blame] | 765 | getContext().getFunctionType(RetTy, ArgTypes, |
John McCall | db40c7f | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 766 | FunctionProtoType::ExtProtoInfo()); |
Adrian Prantl | 42d71b9 | 2014-04-10 23:21:53 +0000 | [diff] [blame] | 767 | DI->EmitFunctionStart(GD, Loc, StartLoc, FnType, CurFn, Builder); |
Sanjiv Gupta | 1e8b608 | 2008-07-04 11:04:26 +0000 | [diff] [blame] | 768 | } |
| 769 | |
Daniel Dunbar | 468a8f8 | 2011-02-10 17:32:22 +0000 | [diff] [blame] | 770 | if (ShouldInstrumentFunction()) |
| 771 | EmitFunctionInstrumentation("__cyg_profile_func_enter"); |
Chris Lattner | 3c77a35 | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 772 | |
Roman Divacky | 178e0160 | 2011-02-10 16:52:03 +0000 | [diff] [blame] | 773 | if (CGM.getCodeGenOpts().InstrumentForProfiling) |
| 774 | EmitMCountInstrumentation(); |
| 775 | |
Eli Friedman | 4b1942c | 2009-12-04 02:43:40 +0000 | [diff] [blame] | 776 | if (RetTy->isVoidType()) { |
| 777 | // Void type; nothing to return. |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 778 | ReturnValue = Address::invalid(); |
Adrian Prantl | 2cede0f | 2014-04-29 01:07:59 +0000 | [diff] [blame] | 779 | |
| 780 | // Count the implicit return. |
| 781 | if (!endsWithReturn(D)) |
| 782 | ++NumReturnExprs; |
Eli Friedman | 4b1942c | 2009-12-04 02:43:40 +0000 | [diff] [blame] | 783 | } else if (CurFnInfo->getReturnInfo().getKind() == ABIArgInfo::Indirect && |
John McCall | 47fb950 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 784 | !hasScalarEvaluationKind(CurFnInfo->getReturnType())) { |
Eli Friedman | 4b1942c | 2009-12-04 02:43:40 +0000 | [diff] [blame] | 785 | // Indirect aggregate return; emit returned value directly into sret slot. |
Daniel Dunbar | fd09df7 | 2010-02-16 19:45:20 +0000 | [diff] [blame] | 786 | // This reduces code size, and affects correctness in C++. |
Reid Kleckner | 37abaca | 2014-05-09 22:46:15 +0000 | [diff] [blame] | 787 | auto AI = CurFn->arg_begin(); |
| 788 | if (CurFnInfo->getReturnInfo().isSRetAfterThis()) |
| 789 | ++AI; |
Duncan P. N. Exon Smith | 9f5260a | 2015-11-06 23:00:41 +0000 | [diff] [blame] | 790 | ReturnValue = Address(&*AI, CurFnInfo->getReturnInfo().getIndirectAlign()); |
Reid Kleckner | 314ef7b | 2014-02-01 00:04:45 +0000 | [diff] [blame] | 791 | } else if (CurFnInfo->getReturnInfo().getKind() == ABIArgInfo::InAlloca && |
| 792 | !hasScalarEvaluationKind(CurFnInfo->getReturnType())) { |
| 793 | // Load the sret pointer from the argument struct and return into that. |
| 794 | unsigned Idx = CurFnInfo->getReturnInfo().getInAllocaFieldIndex(); |
| 795 | llvm::Function::arg_iterator EI = CurFn->arg_end(); |
| 796 | --EI; |
Duncan P. N. Exon Smith | 9f5260a | 2015-11-06 23:00:41 +0000 | [diff] [blame] | 797 | llvm::Value *Addr = Builder.CreateStructGEP(nullptr, &*EI, Idx); |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 798 | Addr = Builder.CreateAlignedLoad(Addr, getPointerAlign(), "agg.result"); |
| 799 | ReturnValue = Address(Addr, getNaturalTypeAlignment(RetTy)); |
Eli Friedman | 4b1942c | 2009-12-04 02:43:40 +0000 | [diff] [blame] | 800 | } else { |
Daniel Dunbar | fd09df7 | 2010-02-16 19:45:20 +0000 | [diff] [blame] | 801 | ReturnValue = CreateIRTemp(RetTy, "retval"); |
John McCall | 31168b0 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 802 | |
| 803 | // Tell the epilog emitter to autorelease the result. We do this |
| 804 | // now so that various specialized functions can suppress it |
| 805 | // during their IR-generation. |
David Blaikie | bbafb8a | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 806 | if (getLangOpts().ObjCAutoRefCount && |
John McCall | 31168b0 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 807 | !CurFnInfo->isReturnsRetained() && |
| 808 | RetTy->isObjCRetainableType()) |
| 809 | AutoreleaseResult = true; |
Eli Friedman | 4b1942c | 2009-12-04 02:43:40 +0000 | [diff] [blame] | 810 | } |
| 811 | |
Mike Stump | 1d84921 | 2009-12-07 23:38:24 +0000 | [diff] [blame] | 812 | EmitStartEHSpec(CurCodeDecl); |
John McCall | 31168b0 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 813 | |
| 814 | PrologueCleanupDepth = EHStack.stable_begin(); |
Daniel Dunbar | d931a87 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 815 | EmitFunctionProlog(*CurFnInfo, CurFn, Args); |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 816 | |
Eli Friedman | 9fbeba0 | 2012-02-11 02:57:39 +0000 | [diff] [blame] | 817 | if (D && isa<CXXMethodDecl>(D) && cast<CXXMethodDecl>(D)->isInstance()) { |
John McCall | 5d865c32 | 2010-08-31 07:33:07 +0000 | [diff] [blame] | 818 | CGM.getCXXABI().EmitInstanceFunctionProlog(*this); |
Eli Friedman | 9fbeba0 | 2012-02-11 02:57:39 +0000 | [diff] [blame] | 819 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(D); |
| 820 | if (MD->getParent()->isLambda() && |
| 821 | MD->getOverloadedOperator() == OO_Call) { |
| 822 | // We're in a lambda; figure out the captures. |
| 823 | MD->getParent()->getCaptureFields(LambdaCaptureFields, |
| 824 | LambdaThisCaptureField); |
| 825 | if (LambdaThisCaptureField) { |
| 826 | // If this lambda captures this, load it. |
John McCall | dec348f7 | 2013-05-03 07:33:41 +0000 | [diff] [blame] | 827 | LValue ThisLValue = EmitLValueForLambdaField(LambdaThisCaptureField); |
Nick Lewycky | 2d84e84 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 828 | CXXThisValue = EmitLoadOfLValue(ThisLValue, |
| 829 | SourceLocation()).getScalarVal(); |
Eli Friedman | 9fbeba0 | 2012-02-11 02:57:39 +0000 | [diff] [blame] | 830 | } |
Alexey Bataev | 39c81e2 | 2014-08-28 04:28:19 +0000 | [diff] [blame] | 831 | for (auto *FD : MD->getParent()->fields()) { |
| 832 | if (FD->hasCapturedVLAType()) { |
| 833 | auto *ExprArg = EmitLoadOfLValue(EmitLValueForLambdaField(FD), |
| 834 | SourceLocation()).getScalarVal(); |
| 835 | auto VAT = FD->getCapturedVLAType(); |
| 836 | VLASizeMap[VAT->getSizeExpr()] = ExprArg; |
| 837 | } |
| 838 | } |
Eli Friedman | 9fbeba0 | 2012-02-11 02:57:39 +0000 | [diff] [blame] | 839 | } else { |
| 840 | // Not in a lambda; just use 'this' from the method. |
| 841 | // FIXME: Should we generate a new load for each use of 'this'? The |
| 842 | // fast register allocator would be happier... |
| 843 | CXXThisValue = CXXABIThisValue; |
| 844 | } |
| 845 | } |
John McCall | 347132b | 2010-02-16 22:04:33 +0000 | [diff] [blame] | 846 | |
Anders Carlsson | c20879a | 2008-12-20 21:28:43 +0000 | [diff] [blame] | 847 | // If any of the arguments have a variably modified type, make sure to |
| 848 | // emit the type size. |
| 849 | for (FunctionArgList::const_iterator i = Args.begin(), e = Args.end(); |
| 850 | i != e; ++i) { |
Eli Friedman | 1f57683 | 2012-11-14 22:09:59 +0000 | [diff] [blame] | 851 | const VarDecl *VD = *i; |
| 852 | |
| 853 | // Dig out the type as written from ParmVarDecls; it's unclear whether |
| 854 | // the standard (C99 6.9.1p10) requires this, but we're following the |
| 855 | // precedent set by gcc. |
| 856 | QualType Ty; |
| 857 | if (const ParmVarDecl *PVD = dyn_cast<ParmVarDecl>(VD)) |
| 858 | Ty = PVD->getOriginalType(); |
| 859 | else |
| 860 | Ty = VD->getType(); |
Anders Carlsson | c20879a | 2008-12-20 21:28:43 +0000 | [diff] [blame] | 861 | |
| 862 | if (Ty->isVariablyModifiedType()) |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 863 | EmitVariablyModifiedType(Ty); |
Anders Carlsson | c20879a | 2008-12-20 21:28:43 +0000 | [diff] [blame] | 864 | } |
Eric Christopher | 7cdf948 | 2011-10-13 21:45:18 +0000 | [diff] [blame] | 865 | // Emit a location at the end of the prologue. |
| 866 | if (CGDebugInfo *DI = getDebugInfo()) |
| 867 | DI->EmitLocation(Builder, StartLoc); |
Daniel Dunbar | bc915f4 | 2008-09-09 23:14:03 +0000 | [diff] [blame] | 868 | } |
Eli Friedman | 3d421e1 | 2008-08-25 21:31:01 +0000 | [diff] [blame] | 869 | |
Richard Smith | b47c36f | 2013-11-05 09:12:18 +0000 | [diff] [blame] | 870 | void CodeGenFunction::EmitFunctionBody(FunctionArgList &Args, |
| 871 | const Stmt *Body) { |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 872 | incrementProfileCounter(Body); |
Richard Smith | b47c36f | 2013-11-05 09:12:18 +0000 | [diff] [blame] | 873 | if (const CompoundStmt *S = dyn_cast<CompoundStmt>(Body)) |
David Blaikie | 0a21d0d | 2013-01-26 22:16:26 +0000 | [diff] [blame] | 874 | EmitCompoundStmtWithoutScope(*S); |
| 875 | else |
Richard Smith | b47c36f | 2013-11-05 09:12:18 +0000 | [diff] [blame] | 876 | EmitStmt(Body); |
John McCall | 89b12b3 | 2010-02-18 03:17:58 +0000 | [diff] [blame] | 877 | } |
| 878 | |
Bob Wilson | bf854f0 | 2014-02-17 19:21:09 +0000 | [diff] [blame] | 879 | /// When instrumenting to collect profile data, the counts for some blocks |
| 880 | /// such as switch cases need to not include the fall-through counts, so |
| 881 | /// emit a branch around the instrumentation code. When not instrumenting, |
| 882 | /// this just calls EmitBlock(). |
| 883 | void CodeGenFunction::EmitBlockWithFallThrough(llvm::BasicBlock *BB, |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 884 | const Stmt *S) { |
Craig Topper | 8a13c41 | 2014-05-21 05:09:00 +0000 | [diff] [blame] | 885 | llvm::BasicBlock *SkipCountBB = nullptr; |
Bob Wilson | bf854f0 | 2014-02-17 19:21:09 +0000 | [diff] [blame] | 886 | if (HaveInsertPoint() && CGM.getCodeGenOpts().ProfileInstrGenerate) { |
| 887 | // When instrumenting for profiling, the fallthrough to certain |
| 888 | // statements needs to skip over the instrumentation code so that we |
| 889 | // get an accurate count. |
| 890 | SkipCountBB = createBasicBlock("skipcount"); |
| 891 | EmitBranch(SkipCountBB); |
| 892 | } |
| 893 | EmitBlock(BB); |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 894 | uint64_t CurrentCount = getCurrentProfileCount(); |
| 895 | incrementProfileCounter(S); |
| 896 | setCurrentProfileCount(getCurrentProfileCount() + CurrentCount); |
Bob Wilson | bf854f0 | 2014-02-17 19:21:09 +0000 | [diff] [blame] | 897 | if (SkipCountBB) |
| 898 | EmitBlock(SkipCountBB); |
| 899 | } |
| 900 | |
John McCall | 8601a75 | 2010-08-03 22:46:07 +0000 | [diff] [blame] | 901 | /// Tries to mark the given function nounwind based on the |
| 902 | /// non-existence of any throwing calls within it. We believe this is |
| 903 | /// lightweight enough to do at -O0. |
| 904 | static void TryMarkNoThrow(llvm::Function *F) { |
John McCall | 5996699 | 2010-08-11 22:38:33 +0000 | [diff] [blame] | 905 | // LLVM treats 'nounwind' on a function as part of the type, so we |
| 906 | // can't do this on functions that can be overwritten. |
| 907 | if (F->mayBeOverridden()) return; |
| 908 | |
David Majnemer | dbf1045 | 2015-07-31 17:58:45 +0000 | [diff] [blame] | 909 | for (llvm::BasicBlock &BB : *F) |
| 910 | for (llvm::Instruction &I : BB) |
| 911 | if (I.mayThrow()) |
Bill Wendling | f0724e8 | 2011-09-19 20:31:14 +0000 | [diff] [blame] | 912 | return; |
David Majnemer | dbf1045 | 2015-07-31 17:58:45 +0000 | [diff] [blame] | 913 | |
Bill Wendling | 73e465e | 2012-10-10 03:13:20 +0000 | [diff] [blame] | 914 | F->setDoesNotThrow(); |
John McCall | 8601a75 | 2010-08-03 22:46:07 +0000 | [diff] [blame] | 915 | } |
| 916 | |
John McCall | a738c25 | 2011-03-09 04:27:21 +0000 | [diff] [blame] | 917 | void CodeGenFunction::GenerateCode(GlobalDecl GD, llvm::Function *Fn, |
| 918 | const CGFunctionInfo &FnInfo) { |
Anders Carlsson | 73fcc95 | 2009-09-11 00:07:24 +0000 | [diff] [blame] | 919 | const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 920 | |
Anders Carlsson | 63784f4 | 2009-02-13 08:11:52 +0000 | [diff] [blame] | 921 | // Check if we should generate debug info for this function. |
David Blaikie | 92848de | 2013-08-26 20:33:21 +0000 | [diff] [blame] | 922 | if (FD->hasAttr<NoDebugAttr>()) |
Craig Topper | 8a13c41 | 2014-05-21 05:09:00 +0000 | [diff] [blame] | 923 | DebugInfo = nullptr; // disable debug info indefinitely for this function |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 924 | |
Daniel Dunbar | bc915f4 | 2008-09-09 23:14:03 +0000 | [diff] [blame] | 925 | FunctionArgList Args; |
Alp Toker | 314cc81 | 2014-01-25 16:55:45 +0000 | [diff] [blame] | 926 | QualType ResTy = FD->getReturnType(); |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 927 | |
Mike Stump | bee78dd | 2009-12-04 23:26:17 +0000 | [diff] [blame] | 928 | CurGD = GD; |
Reid Kleckner | 89077a1 | 2013-12-17 19:46:40 +0000 | [diff] [blame] | 929 | const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD); |
| 930 | if (MD && MD->isInstance()) { |
Stephen Lin | 9dc6eef | 2013-06-30 20:40:16 +0000 | [diff] [blame] | 931 | if (CGM.getCXXABI().HasThisReturn(GD)) |
| 932 | ResTy = MD->getThisType(getContext()); |
David Majnemer | 0c0b6d9 | 2014-10-31 20:09:12 +0000 | [diff] [blame] | 933 | else if (CGM.getCXXABI().hasMostDerivedReturn(GD)) |
| 934 | ResTy = CGM.getContext().VoidPtrTy; |
Reid Kleckner | 89077a1 | 2013-12-17 19:46:40 +0000 | [diff] [blame] | 935 | CGM.getCXXABI().buildThisParam(*this, Args); |
Stephen Lin | 9dc6eef | 2013-06-30 20:40:16 +0000 | [diff] [blame] | 936 | } |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 937 | |
George Burgess IV | 3e3bb95b | 2015-12-02 21:58:08 +0000 | [diff] [blame] | 938 | for (auto *Param : FD->params()) { |
| 939 | Args.push_back(Param); |
| 940 | if (!Param->hasAttr<PassObjectSizeAttr>()) |
| 941 | continue; |
| 942 | |
| 943 | IdentifierInfo *NoID = nullptr; |
| 944 | auto *Implicit = ImplicitParamDecl::Create( |
| 945 | getContext(), Param->getDeclContext(), Param->getLocation(), NoID, |
| 946 | getContext().getSizeType()); |
| 947 | SizeArguments[Param] = Implicit; |
| 948 | Args.push_back(Implicit); |
| 949 | } |
Daniel Dunbar | 89654ee | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 950 | |
Reid Kleckner | 89077a1 | 2013-12-17 19:46:40 +0000 | [diff] [blame] | 951 | if (MD && (isa<CXXConstructorDecl>(MD) || isa<CXXDestructorDecl>(MD))) |
| 952 | CGM.getCXXABI().addImplicitStructorParams(*this, ResTy, Args); |
| 953 | |
John McCall | 89b12b3 | 2010-02-18 03:17:58 +0000 | [diff] [blame] | 954 | SourceRange BodyRange; |
| 955 | if (Stmt *Body = FD->getBody()) BodyRange = Body->getSourceRange(); |
Adrian Prantl | dc237b5 | 2013-05-16 00:41:26 +0000 | [diff] [blame] | 956 | CurEHLocation = BodyRange.getEnd(); |
Anders Carlsson | 438cf92 | 2009-11-06 02:55:43 +0000 | [diff] [blame] | 957 | |
Adrian Prantl | 42d71b9 | 2014-04-10 23:21:53 +0000 | [diff] [blame] | 958 | // Use the location of the start of the function to determine where |
| 959 | // the function definition is located. By default use the location |
| 960 | // of the declaration as the location for the subprogram. A function |
| 961 | // may lack a declaration in the source code if it is created by code |
| 962 | // gen. (examples: _GLOBAL__I_a, __cxx_global_array_dtor, thunk). |
Alexey Samsonov | cb1ad6f | 2014-07-08 20:23:18 +0000 | [diff] [blame] | 963 | SourceLocation Loc = FD->getLocation(); |
Adrian Prantl | 42d71b9 | 2014-04-10 23:21:53 +0000 | [diff] [blame] | 964 | |
Alexey Samsonov | cb1ad6f | 2014-07-08 20:23:18 +0000 | [diff] [blame] | 965 | // If this is a function specialization then use the pattern body |
| 966 | // as the location for the function. |
| 967 | if (const FunctionDecl *SpecDecl = FD->getTemplateInstantiationPattern()) |
| 968 | if (SpecDecl->hasBody(SpecDecl)) |
| 969 | Loc = SpecDecl->getLocation(); |
Adrian Prantl | 42d71b9 | 2014-04-10 23:21:53 +0000 | [diff] [blame] | 970 | |
John McCall | 89b12b3 | 2010-02-18 03:17:58 +0000 | [diff] [blame] | 971 | // Emit the standard function prologue. |
Adrian Prantl | 42d71b9 | 2014-04-10 23:21:53 +0000 | [diff] [blame] | 972 | StartFunction(GD, ResTy, Fn, FnInfo, Args, Loc, BodyRange.getBegin()); |
Anders Carlsson | 438cf92 | 2009-11-06 02:55:43 +0000 | [diff] [blame] | 973 | |
John McCall | 89b12b3 | 2010-02-18 03:17:58 +0000 | [diff] [blame] | 974 | // Generate the body of the function. |
Serge Pavlov | 3a56145 | 2015-12-06 14:32:39 +0000 | [diff] [blame] | 975 | PGO.assignRegionCounters(GD, CurFn); |
John McCall | b81884d | 2010-02-19 09:25:03 +0000 | [diff] [blame] | 976 | if (isa<CXXDestructorDecl>(FD)) |
| 977 | EmitDestructorBody(Args); |
| 978 | else if (isa<CXXConstructorDecl>(FD)) |
| 979 | EmitConstructorBody(Args); |
Richard Smith | 9c6890a | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 980 | else if (getLangOpts().CUDA && |
Artem Belevich | f3d3db6 | 2015-03-19 18:58:18 +0000 | [diff] [blame] | 981 | !getLangOpts().CUDAIsDevice && |
Peter Collingbourne | fa4d603 | 2011-10-06 18:51:56 +0000 | [diff] [blame] | 982 | FD->hasAttr<CUDAGlobalAttr>()) |
Artem Belevich | 52cc487 | 2015-05-07 19:34:16 +0000 | [diff] [blame] | 983 | CGM.getCUDARuntime().emitDeviceStub(*this, Args); |
Eli Friedman | 5a6d507 | 2012-02-16 01:37:33 +0000 | [diff] [blame] | 984 | else if (isa<CXXConversionDecl>(FD) && |
Douglas Gregor | 355efbb | 2012-02-17 03:02:34 +0000 | [diff] [blame] | 985 | cast<CXXConversionDecl>(FD)->isLambdaToBlockPointerConversion()) { |
| 986 | // The lambda conversion to block pointer is special; the semantics can't be |
| 987 | // expressed in the AST, so IRGen needs to special-case it. |
| 988 | EmitLambdaToBlockPointerBody(Args); |
| 989 | } else if (isa<CXXMethodDecl>(FD) && |
| 990 | cast<CXXMethodDecl>(FD)->isLambdaStaticInvoker()) { |
Faisal Vali | 2b391ab | 2013-09-26 19:54:12 +0000 | [diff] [blame] | 991 | // The lambda static invoker function is special, because it forwards or |
Douglas Gregor | 355efbb | 2012-02-17 03:02:34 +0000 | [diff] [blame] | 992 | // clones the body of the function call operator (but is actually static). |
| 993 | EmitLambdaStaticInvokeFunction(cast<CXXMethodDecl>(FD)); |
Lang Hames | bf12274 | 2013-02-17 07:22:09 +0000 | [diff] [blame] | 994 | } else if (FD->isDefaulted() && isa<CXXMethodDecl>(FD) && |
Nick Lewycky | b39be1f | 2013-09-10 05:14:39 +0000 | [diff] [blame] | 995 | (cast<CXXMethodDecl>(FD)->isCopyAssignmentOperator() || |
| 996 | cast<CXXMethodDecl>(FD)->isMoveAssignmentOperator())) { |
Lang Hames | bf12274 | 2013-02-17 07:22:09 +0000 | [diff] [blame] | 997 | // Implicit copy-assignment gets the same special treatment as implicit |
| 998 | // copy-constructors. |
| 999 | emitImplicitAssignmentOperatorBody(Args); |
Richard Smith | b47c36f | 2013-11-05 09:12:18 +0000 | [diff] [blame] | 1000 | } else if (Stmt *Body = FD->getBody()) { |
| 1001 | EmitFunctionBody(Args, Body); |
Richard Smith | b47c36f | 2013-11-05 09:12:18 +0000 | [diff] [blame] | 1002 | } else |
| 1003 | llvm_unreachable("no definition for emitted function"); |
Anders Carlsson | ff8cce4 | 2010-02-07 19:45:40 +0000 | [diff] [blame] | 1004 | |
Richard Smith | 9f9e582 | 2012-10-04 23:52:29 +0000 | [diff] [blame] | 1005 | // C++11 [stmt.return]p2: |
| 1006 | // Flowing off the end of a function [...] results in undefined behavior in |
| 1007 | // a value-returning function. |
| 1008 | // C11 6.9.1p12: |
| 1009 | // If the '}' that terminates a function is reached, and the value of the |
| 1010 | // function call is used by the caller, the behavior is undefined. |
Reid Kleckner | 9b3e3df | 2014-09-04 20:04:38 +0000 | [diff] [blame] | 1011 | if (getLangOpts().CPlusPlus && !FD->hasImplicitReturnZero() && !SawAsmBlock && |
Alp Toker | 314cc81 | 2014-01-25 16:55:45 +0000 | [diff] [blame] | 1012 | !FD->getReturnType()->isVoidType() && Builder.GetInsertBlock()) { |
Alexey Samsonov | edf99a9 | 2014-11-07 22:29:38 +0000 | [diff] [blame] | 1013 | if (SanOpts.has(SanitizerKind::Return)) { |
Alexey Samsonov | 24cad99 | 2014-07-17 18:46:27 +0000 | [diff] [blame] | 1014 | SanitizerScope SanScope(this); |
Alexey Samsonov | e396bfc | 2014-11-11 22:03:54 +0000 | [diff] [blame] | 1015 | llvm::Value *IsFalse = Builder.getFalse(); |
| 1016 | EmitCheck(std::make_pair(IsFalse, SanitizerKind::Return), |
| 1017 | "missing_return", EmitCheckSourceLocation(FD->getLocation()), |
| 1018 | None); |
Akira Hatanaka | 85365cd | 2015-07-02 22:15:41 +0000 | [diff] [blame] | 1019 | } else if (CGM.getCodeGenOpts().OptimizationLevel == 0) { |
| 1020 | EmitTrapCall(llvm::Intrinsic::trap); |
| 1021 | } |
Richard Smith | 9f9e582 | 2012-10-04 23:52:29 +0000 | [diff] [blame] | 1022 | Builder.CreateUnreachable(); |
| 1023 | Builder.ClearInsertionPoint(); |
| 1024 | } |
| 1025 | |
John McCall | 89b12b3 | 2010-02-18 03:17:58 +0000 | [diff] [blame] | 1026 | // Emit the standard function epilogue. |
| 1027 | FinishFunction(BodyRange.getEnd()); |
John McCall | 8601a75 | 2010-08-03 22:46:07 +0000 | [diff] [blame] | 1028 | |
| 1029 | // If we haven't marked the function nothrow through other means, do |
| 1030 | // a quick pass now to see if we can. |
| 1031 | if (!CurFn->doesNotThrow()) |
| 1032 | TryMarkNoThrow(CurFn); |
Chris Lattner | 5696e7b | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 1033 | } |
| 1034 | |
Chris Lattner | 5b1964b | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 1035 | /// ContainsLabel - Return true if the statement contains a label in it. If |
| 1036 | /// this statement is not executed normally, it not containing a label means |
| 1037 | /// that we can just remove the code. |
| 1038 | bool CodeGenFunction::ContainsLabel(const Stmt *S, bool IgnoreCaseStmts) { |
| 1039 | // Null statement, not a label! |
Craig Topper | 8a13c41 | 2014-05-21 05:09:00 +0000 | [diff] [blame] | 1040 | if (!S) return false; |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1041 | |
Chris Lattner | 5b1964b | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 1042 | // If this is a label, we have to emit the code, consider something like: |
| 1043 | // if (0) { ... foo: bar(); } goto foo; |
Chris Lattner | 29911cc | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 1044 | // |
| 1045 | // TODO: If anyone cared, we could track __label__'s, since we know that you |
| 1046 | // can't jump to one from outside their declared region. |
Chris Lattner | 5b1964b | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 1047 | if (isa<LabelStmt>(S)) |
| 1048 | return true; |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1049 | |
Chris Lattner | 5b1964b | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 1050 | // If this is a case/default statement, and we haven't seen a switch, we have |
| 1051 | // to emit the code. |
| 1052 | if (isa<SwitchCase>(S) && !IgnoreCaseStmts) |
| 1053 | return true; |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1054 | |
Chris Lattner | 5b1964b | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 1055 | // If this is a switch statement, we want to ignore cases below it. |
| 1056 | if (isa<SwitchStmt>(S)) |
| 1057 | IgnoreCaseStmts = true; |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1058 | |
Chris Lattner | 5b1964b | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 1059 | // Scan subexpressions for verboten labels. |
Benjamin Kramer | 642f173 | 2015-07-02 21:03:14 +0000 | [diff] [blame] | 1060 | for (const Stmt *SubStmt : S->children()) |
| 1061 | if (ContainsLabel(SubStmt, IgnoreCaseStmts)) |
Chris Lattner | 5b1964b | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 1062 | return true; |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1063 | |
Chris Lattner | 5b1964b | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 1064 | return false; |
| 1065 | } |
| 1066 | |
Chris Lattner | 29911cc | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 1067 | /// containsBreak - Return true if the statement contains a break out of it. |
| 1068 | /// If the statement (recursively) contains a switch or loop with a break |
| 1069 | /// inside of it, this is fine. |
| 1070 | bool CodeGenFunction::containsBreak(const Stmt *S) { |
| 1071 | // Null statement, not a label! |
Craig Topper | 8a13c41 | 2014-05-21 05:09:00 +0000 | [diff] [blame] | 1072 | if (!S) return false; |
Chris Lattner | 29911cc | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 1073 | |
| 1074 | // If this is a switch or loop that defines its own break scope, then we can |
| 1075 | // include it and anything inside of it. |
| 1076 | if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) || isa<DoStmt>(S) || |
| 1077 | isa<ForStmt>(S)) |
Chris Lattner | 30db828 | 2011-02-28 00:42:31 +0000 | [diff] [blame] | 1078 | return false; |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1079 | |
Chris Lattner | 30db828 | 2011-02-28 00:42:31 +0000 | [diff] [blame] | 1080 | if (isa<BreakStmt>(S)) |
Chris Lattner | 29911cc | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 1081 | return true; |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1082 | |
Chris Lattner | 29911cc | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 1083 | // Scan subexpressions for verboten breaks. |
Benjamin Kramer | 642f173 | 2015-07-02 21:03:14 +0000 | [diff] [blame] | 1084 | for (const Stmt *SubStmt : S->children()) |
| 1085 | if (containsBreak(SubStmt)) |
Chris Lattner | 29911cc | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 1086 | return true; |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1087 | |
Chris Lattner | 29911cc | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 1088 | return false; |
| 1089 | } |
| 1090 | |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1091 | |
Chris Lattner | 41c6ab5 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 1092 | /// ConstantFoldsToSimpleInteger - If the specified expression does not fold |
| 1093 | /// to a constant, or if it does but contains a label, return false. If it |
| 1094 | /// constant folds return true and set the boolean result in Result. |
| 1095 | bool CodeGenFunction::ConstantFoldsToSimpleInteger(const Expr *Cond, |
| 1096 | bool &ResultBool) { |
Richard Trieu | c320c74 | 2012-07-23 20:21:35 +0000 | [diff] [blame] | 1097 | llvm::APSInt ResultInt; |
Chris Lattner | 29911cc | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 1098 | if (!ConstantFoldsToSimpleInteger(Cond, ResultInt)) |
| 1099 | return false; |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1100 | |
Chris Lattner | 29911cc | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 1101 | ResultBool = ResultInt.getBoolValue(); |
| 1102 | return true; |
| 1103 | } |
| 1104 | |
| 1105 | /// ConstantFoldsToSimpleInteger - If the specified expression does not fold |
| 1106 | /// to a constant, or if it does but contains a label, return false. If it |
| 1107 | /// constant folds return true and set the folded value. |
| 1108 | bool CodeGenFunction:: |
Richard Trieu | c320c74 | 2012-07-23 20:21:35 +0000 | [diff] [blame] | 1109 | ConstantFoldsToSimpleInteger(const Expr *Cond, llvm::APSInt &ResultInt) { |
Daniel Dunbar | f32443c | 2008-11-12 22:37:10 +0000 | [diff] [blame] | 1110 | // FIXME: Rename and handle conversion of other evaluatable things |
| 1111 | // to bool. |
Richard Smith | 5fab0c9 | 2011-12-28 19:48:30 +0000 | [diff] [blame] | 1112 | llvm::APSInt Int; |
| 1113 | if (!Cond->EvaluateAsInt(Int, getContext())) |
Chris Lattner | 41c6ab5 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 1114 | return false; // Not foldable, not integer or not fully evaluatable. |
Richard Smith | 5fab0c9 | 2011-12-28 19:48:30 +0000 | [diff] [blame] | 1115 | |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1116 | if (CodeGenFunction::ContainsLabel(Cond)) |
Chris Lattner | 41c6ab5 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 1117 | return false; // Contains a label. |
Richard Smith | 5fab0c9 | 2011-12-28 19:48:30 +0000 | [diff] [blame] | 1118 | |
| 1119 | ResultInt = Int; |
Chris Lattner | 41c6ab5 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 1120 | return true; |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1121 | } |
| 1122 | |
| 1123 | |
Chris Lattner | 29911cc | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 1124 | |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1125 | /// EmitBranchOnBoolExpr - Emit a branch on a boolean condition (e.g. for an if |
| 1126 | /// statement) to the specified blocks. Based on the condition, this might try |
| 1127 | /// to simplify the codegen of the conditional based on the branch. |
| 1128 | /// |
| 1129 | void CodeGenFunction::EmitBranchOnBoolExpr(const Expr *Cond, |
| 1130 | llvm::BasicBlock *TrueBlock, |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1131 | llvm::BasicBlock *FalseBlock, |
| 1132 | uint64_t TrueCount) { |
Peter Collingbourne | 9114759 | 2011-04-15 00:35:48 +0000 | [diff] [blame] | 1133 | Cond = Cond->IgnoreParens(); |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1134 | |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1135 | if (const BinaryOperator *CondBOp = dyn_cast<BinaryOperator>(Cond)) { |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1136 | |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1137 | // Handle X && Y in a condition. |
John McCall | e302792 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1138 | if (CondBOp->getOpcode() == BO_LAnd) { |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1139 | // If we have "1 && X", simplify the code. "0 && X" would have constant |
| 1140 | // folded if the case was simple enough. |
Bill Wendling | 6c9540e | 2011-03-04 21:46:03 +0000 | [diff] [blame] | 1141 | bool ConstantBool = false; |
Chris Lattner | 41c6ab5 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 1142 | if (ConstantFoldsToSimpleInteger(CondBOp->getLHS(), ConstantBool) && |
| 1143 | ConstantBool) { |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1144 | // br(1 && X) -> br(X). |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 1145 | incrementProfileCounter(CondBOp); |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1146 | return EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock, |
| 1147 | TrueCount); |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1148 | } |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1149 | |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1150 | // If we have "X && 1", simplify the code to use an uncond branch. |
| 1151 | // "X && 0" would have been constant folded to 0. |
Chris Lattner | 41c6ab5 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 1152 | if (ConstantFoldsToSimpleInteger(CondBOp->getRHS(), ConstantBool) && |
| 1153 | ConstantBool) { |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1154 | // br(X && 1) -> br(X). |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1155 | return EmitBranchOnBoolExpr(CondBOp->getLHS(), TrueBlock, FalseBlock, |
| 1156 | TrueCount); |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1157 | } |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1158 | |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1159 | // Emit the LHS as a conditional. If the LHS conditional is false, we |
| 1160 | // want to jump to the FalseBlock. |
Daniel Dunbar | a612e79 | 2008-11-13 01:38:36 +0000 | [diff] [blame] | 1161 | llvm::BasicBlock *LHSTrue = createBasicBlock("land.lhs.true"); |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1162 | // The counter tells us how often we evaluate RHS, and all of TrueCount |
| 1163 | // can be propagated to that branch. |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 1164 | uint64_t RHSCount = getProfileCount(CondBOp->getRHS()); |
John McCall | ce1de61 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 1165 | |
| 1166 | ConditionalEvaluation eval(*this); |
David Blaikie | 298720d | 2015-01-28 19:50:09 +0000 | [diff] [blame] | 1167 | { |
| 1168 | ApplyDebugLocation DL(*this, Cond); |
| 1169 | EmitBranchOnBoolExpr(CondBOp->getLHS(), LHSTrue, FalseBlock, RHSCount); |
| 1170 | EmitBlock(LHSTrue); |
| 1171 | } |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1172 | |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 1173 | incrementProfileCounter(CondBOp); |
| 1174 | setCurrentProfileCount(getProfileCount(CondBOp->getRHS())); |
| 1175 | |
Anders Carlsson | 60ddba6 | 2010-01-24 00:20:05 +0000 | [diff] [blame] | 1176 | // Any temporaries created here are conditional. |
John McCall | ce1de61 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 1177 | eval.begin(*this); |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1178 | EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock, TrueCount); |
John McCall | ce1de61 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 1179 | eval.end(*this); |
Anders Carlsson | 60ddba6 | 2010-01-24 00:20:05 +0000 | [diff] [blame] | 1180 | |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1181 | return; |
Chris Lattner | 41c6ab5 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 1182 | } |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1183 | |
Chris Lattner | 41c6ab5 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 1184 | if (CondBOp->getOpcode() == BO_LOr) { |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1185 | // If we have "0 || X", simplify the code. "1 || X" would have constant |
| 1186 | // folded if the case was simple enough. |
Bill Wendling | 6c9540e | 2011-03-04 21:46:03 +0000 | [diff] [blame] | 1187 | bool ConstantBool = false; |
Chris Lattner | 41c6ab5 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 1188 | if (ConstantFoldsToSimpleInteger(CondBOp->getLHS(), ConstantBool) && |
| 1189 | !ConstantBool) { |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1190 | // br(0 || X) -> br(X). |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 1191 | incrementProfileCounter(CondBOp); |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1192 | return EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock, |
| 1193 | TrueCount); |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1194 | } |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1195 | |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1196 | // If we have "X || 0", simplify the code to use an uncond branch. |
| 1197 | // "X || 1" would have been constant folded to 1. |
Chris Lattner | 41c6ab5 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 1198 | if (ConstantFoldsToSimpleInteger(CondBOp->getRHS(), ConstantBool) && |
| 1199 | !ConstantBool) { |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1200 | // br(X || 0) -> br(X). |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1201 | return EmitBranchOnBoolExpr(CondBOp->getLHS(), TrueBlock, FalseBlock, |
| 1202 | TrueCount); |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1203 | } |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1204 | |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1205 | // Emit the LHS as a conditional. If the LHS conditional is true, we |
| 1206 | // want to jump to the TrueBlock. |
Daniel Dunbar | a612e79 | 2008-11-13 01:38:36 +0000 | [diff] [blame] | 1207 | llvm::BasicBlock *LHSFalse = createBasicBlock("lor.lhs.false"); |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1208 | // We have the count for entry to the RHS and for the whole expression |
| 1209 | // being true, so we can divy up True count between the short circuit and |
| 1210 | // the RHS. |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 1211 | uint64_t LHSCount = |
| 1212 | getCurrentProfileCount() - getProfileCount(CondBOp->getRHS()); |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1213 | uint64_t RHSCount = TrueCount - LHSCount; |
John McCall | ce1de61 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 1214 | |
| 1215 | ConditionalEvaluation eval(*this); |
David Blaikie | 298720d | 2015-01-28 19:50:09 +0000 | [diff] [blame] | 1216 | { |
| 1217 | ApplyDebugLocation DL(*this, Cond); |
| 1218 | EmitBranchOnBoolExpr(CondBOp->getLHS(), TrueBlock, LHSFalse, LHSCount); |
| 1219 | EmitBlock(LHSFalse); |
| 1220 | } |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1221 | |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 1222 | incrementProfileCounter(CondBOp); |
| 1223 | setCurrentProfileCount(getProfileCount(CondBOp->getRHS())); |
| 1224 | |
Anders Carlsson | 60ddba6 | 2010-01-24 00:20:05 +0000 | [diff] [blame] | 1225 | // Any temporaries created here are conditional. |
John McCall | ce1de61 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 1226 | eval.begin(*this); |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1227 | EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock, RHSCount); |
| 1228 | |
John McCall | ce1de61 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 1229 | eval.end(*this); |
Anders Carlsson | 60ddba6 | 2010-01-24 00:20:05 +0000 | [diff] [blame] | 1230 | |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1231 | return; |
| 1232 | } |
Chris Lattner | d953773 | 2008-11-12 08:13:36 +0000 | [diff] [blame] | 1233 | } |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1234 | |
Chris Lattner | d953773 | 2008-11-12 08:13:36 +0000 | [diff] [blame] | 1235 | if (const UnaryOperator *CondUOp = dyn_cast<UnaryOperator>(Cond)) { |
| 1236 | // br(!x, t, f) -> br(x, f, t) |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1237 | if (CondUOp->getOpcode() == UO_LNot) { |
| 1238 | // Negate the count. |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 1239 | uint64_t FalseCount = getCurrentProfileCount() - TrueCount; |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1240 | // Negate the condition and swap the destination blocks. |
| 1241 | return EmitBranchOnBoolExpr(CondUOp->getSubExpr(), FalseBlock, TrueBlock, |
| 1242 | FalseCount); |
| 1243 | } |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1244 | } |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1245 | |
Daniel Dunbar | bf3c22e | 2008-11-12 10:30:32 +0000 | [diff] [blame] | 1246 | if (const ConditionalOperator *CondOp = dyn_cast<ConditionalOperator>(Cond)) { |
Eli Friedman | 248f898 | 2012-02-14 03:54:45 +0000 | [diff] [blame] | 1247 | // br(c ? x : y, t, f) -> br(c, br(x, t, f), br(y, t, f)) |
| 1248 | llvm::BasicBlock *LHSBlock = createBasicBlock("cond.true"); |
| 1249 | llvm::BasicBlock *RHSBlock = createBasicBlock("cond.false"); |
Daniel Dunbar | bf3c22e | 2008-11-12 10:30:32 +0000 | [diff] [blame] | 1250 | |
Eli Friedman | 248f898 | 2012-02-14 03:54:45 +0000 | [diff] [blame] | 1251 | ConditionalEvaluation cond(*this); |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 1252 | EmitBranchOnBoolExpr(CondOp->getCond(), LHSBlock, RHSBlock, |
| 1253 | getProfileCount(CondOp)); |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1254 | |
| 1255 | // When computing PGO branch weights, we only know the overall count for |
| 1256 | // the true block. This code is essentially doing tail duplication of the |
| 1257 | // naive code-gen, introducing new edges for which counts are not |
| 1258 | // available. Divide the counts proportionally between the LHS and RHS of |
| 1259 | // the conditional operator. |
| 1260 | uint64_t LHSScaledTrueCount = 0; |
| 1261 | if (TrueCount) { |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 1262 | double LHSRatio = |
| 1263 | getProfileCount(CondOp) / (double)getCurrentProfileCount(); |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1264 | LHSScaledTrueCount = TrueCount * LHSRatio; |
| 1265 | } |
John McCall | ce1de61 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 1266 | |
Eli Friedman | 248f898 | 2012-02-14 03:54:45 +0000 | [diff] [blame] | 1267 | cond.begin(*this); |
| 1268 | EmitBlock(LHSBlock); |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 1269 | incrementProfileCounter(CondOp); |
David Blaikie | 298720d | 2015-01-28 19:50:09 +0000 | [diff] [blame] | 1270 | { |
| 1271 | ApplyDebugLocation DL(*this, Cond); |
| 1272 | EmitBranchOnBoolExpr(CondOp->getLHS(), TrueBlock, FalseBlock, |
| 1273 | LHSScaledTrueCount); |
| 1274 | } |
Eli Friedman | 248f898 | 2012-02-14 03:54:45 +0000 | [diff] [blame] | 1275 | cond.end(*this); |
John McCall | ce1de61 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 1276 | |
Eli Friedman | 248f898 | 2012-02-14 03:54:45 +0000 | [diff] [blame] | 1277 | cond.begin(*this); |
| 1278 | EmitBlock(RHSBlock); |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1279 | EmitBranchOnBoolExpr(CondOp->getRHS(), TrueBlock, FalseBlock, |
| 1280 | TrueCount - LHSScaledTrueCount); |
Eli Friedman | 248f898 | 2012-02-14 03:54:45 +0000 | [diff] [blame] | 1281 | cond.end(*this); |
John McCall | ce1de61 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 1282 | |
Eli Friedman | 248f898 | 2012-02-14 03:54:45 +0000 | [diff] [blame] | 1283 | return; |
Daniel Dunbar | bf3c22e | 2008-11-12 10:30:32 +0000 | [diff] [blame] | 1284 | } |
| 1285 | |
Richard Smith | ea85232 | 2013-05-07 21:53:22 +0000 | [diff] [blame] | 1286 | if (const CXXThrowExpr *Throw = dyn_cast<CXXThrowExpr>(Cond)) { |
| 1287 | // Conditional operator handling can give us a throw expression as a |
| 1288 | // condition for a case like: |
| 1289 | // br(c ? throw x : y, t, f) -> br(c, br(throw x, t, f), br(y, t, f) |
| 1290 | // Fold this to: |
| 1291 | // br(c, throw x, br(y, t, f)) |
| 1292 | EmitCXXThrowExpr(Throw, /*KeepInsertionPoint*/false); |
| 1293 | return; |
| 1294 | } |
| 1295 | |
Sanjay Patel | a24296b | 2015-09-02 20:01:30 +0000 | [diff] [blame] | 1296 | // If the branch has a condition wrapped by __builtin_unpredictable, |
| 1297 | // create metadata that specifies that the branch is unpredictable. |
| 1298 | // Don't bother if not optimizing because that metadata would not be used. |
| 1299 | llvm::MDNode *Unpredictable = nullptr; |
| 1300 | if (CGM.getCodeGenOpts().OptimizationLevel != 0) { |
| 1301 | if (const CallExpr *Call = dyn_cast<CallExpr>(Cond)) { |
| 1302 | const Decl *TargetDecl = Call->getCalleeDecl(); |
| 1303 | if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(TargetDecl)) { |
| 1304 | if (FD->getBuiltinID() == Builtin::BI__builtin_unpredictable) { |
| 1305 | llvm::MDBuilder MDHelper(getLLVMContext()); |
| 1306 | Unpredictable = MDHelper.createUnpredictable(); |
| 1307 | } |
| 1308 | } |
| 1309 | } |
| 1310 | } |
| 1311 | |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1312 | // Create branch weights based on the number of times we get here and the |
| 1313 | // number of times the condition should be true. |
Justin Bogner | 66242d6 | 2015-04-23 23:06:47 +0000 | [diff] [blame] | 1314 | uint64_t CurrentCount = std::max(getCurrentProfileCount(), TrueCount); |
Justin Bogner | 6551264 | 2015-05-02 05:00:55 +0000 | [diff] [blame] | 1315 | llvm::MDNode *Weights = |
| 1316 | createProfileWeights(TrueCount, CurrentCount - TrueCount); |
Justin Bogner | ef512b9 | 2014-01-06 22:27:43 +0000 | [diff] [blame] | 1317 | |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1318 | // Emit the code with the fully general case. |
David Blaikie | 303facb | 2015-01-31 01:10:11 +0000 | [diff] [blame] | 1319 | llvm::Value *CondV; |
| 1320 | { |
| 1321 | ApplyDebugLocation DL(*this, Cond); |
| 1322 | CondV = EvaluateExprAsBool(Cond); |
| 1323 | } |
Sanjay Patel | a24296b | 2015-09-02 20:01:30 +0000 | [diff] [blame] | 1324 | Builder.CreateCondBr(CondV, TrueBlock, FalseBlock, Weights, Unpredictable); |
Chris Lattner | cd43929 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 1325 | } |
| 1326 | |
Daniel Dunbar | a7c8cf6 | 2008-08-16 00:56:44 +0000 | [diff] [blame] | 1327 | /// ErrorUnsupported - Print out an error that codegen doesn't support the |
Chris Lattner | fc94434 | 2007-12-02 01:43:38 +0000 | [diff] [blame] | 1328 | /// specified stmt yet. |
David Blaikie | 4a9ec7b | 2013-08-19 21:02:26 +0000 | [diff] [blame] | 1329 | void CodeGenFunction::ErrorUnsupported(const Stmt *S, const char *Type) { |
| 1330 | CGM.ErrorUnsupported(S, Type); |
Chris Lattner | fc94434 | 2007-12-02 01:43:38 +0000 | [diff] [blame] | 1331 | } |
| 1332 | |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1333 | /// emitNonZeroVLAInit - Emit the "zero" initialization of a |
| 1334 | /// variable-length array whose elements have a non-zero bit-pattern. |
| 1335 | /// |
James Dennett | be30245 | 2012-06-15 22:10:14 +0000 | [diff] [blame] | 1336 | /// \param baseType the inner-most element type of the array |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1337 | /// \param src - a char* pointing to the bit-pattern for a single |
| 1338 | /// base element of the array |
| 1339 | /// \param sizeInChars - the total size of the VLA, in chars |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1340 | static void emitNonZeroVLAInit(CodeGenFunction &CGF, QualType baseType, |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1341 | Address dest, Address src, |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1342 | llvm::Value *sizeInChars) { |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1343 | CGBuilderTy &Builder = CGF.Builder; |
| 1344 | |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1345 | CharUnits baseSize = CGF.getContext().getTypeSizeInChars(baseType); |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1346 | llvm::Value *baseSizeInChars |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1347 | = llvm::ConstantInt::get(CGF.IntPtrTy, baseSize.getQuantity()); |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1348 | |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1349 | Address begin = |
| 1350 | Builder.CreateElementBitCast(dest, CGF.Int8Ty, "vla.begin"); |
| 1351 | llvm::Value *end = |
| 1352 | Builder.CreateInBoundsGEP(begin.getPointer(), sizeInChars, "vla.end"); |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1353 | |
| 1354 | llvm::BasicBlock *originBB = CGF.Builder.GetInsertBlock(); |
| 1355 | llvm::BasicBlock *loopBB = CGF.createBasicBlock("vla-init.loop"); |
| 1356 | llvm::BasicBlock *contBB = CGF.createBasicBlock("vla-init.cont"); |
| 1357 | |
| 1358 | // Make a loop over the VLA. C99 guarantees that the VLA element |
| 1359 | // count must be nonzero. |
| 1360 | CGF.EmitBlock(loopBB); |
| 1361 | |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1362 | llvm::PHINode *cur = Builder.CreatePHI(begin.getType(), 2, "vla.cur"); |
| 1363 | cur->addIncoming(begin.getPointer(), originBB); |
| 1364 | |
| 1365 | CharUnits curAlign = |
| 1366 | dest.getAlignment().alignmentOfArrayElement(baseSize); |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1367 | |
| 1368 | // memcpy the individual element bit-pattern. |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1369 | Builder.CreateMemCpy(Address(cur, curAlign), src, baseSizeInChars, |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1370 | /*volatile*/ false); |
| 1371 | |
| 1372 | // Go to the next element. |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1373 | llvm::Value *next = |
| 1374 | Builder.CreateInBoundsGEP(CGF.Int8Ty, cur, baseSizeInChars, "vla.next"); |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1375 | |
| 1376 | // Leave if that's the end of the VLA. |
| 1377 | llvm::Value *done = Builder.CreateICmpEQ(next, end, "vla-init.isdone"); |
| 1378 | Builder.CreateCondBr(done, contBB, loopBB); |
| 1379 | cur->addIncoming(next, loopBB); |
| 1380 | |
| 1381 | CGF.EmitBlock(contBB); |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1382 | } |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1383 | |
Anders Carlsson | c0964b6 | 2010-05-22 17:35:42 +0000 | [diff] [blame] | 1384 | void |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1385 | CodeGenFunction::EmitNullInitialization(Address DestPtr, QualType Ty) { |
Anders Carlsson | 16e94af | 2010-05-03 01:20:20 +0000 | [diff] [blame] | 1386 | // Ignore empty classes in C++. |
Richard Smith | 9c6890a | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 1387 | if (getLangOpts().CPlusPlus) { |
Anders Carlsson | 16e94af | 2010-05-03 01:20:20 +0000 | [diff] [blame] | 1388 | if (const RecordType *RT = Ty->getAs<RecordType>()) { |
| 1389 | if (cast<CXXRecordDecl>(RT->getDecl())->isEmpty()) |
| 1390 | return; |
| 1391 | } |
| 1392 | } |
John McCall | 7cd1d97 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1393 | |
| 1394 | // Cast the dest ptr to the appropriate i8 pointer type. |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1395 | if (DestPtr.getElementType() != Int8Ty) |
| 1396 | DestPtr = Builder.CreateElementBitCast(DestPtr, Int8Ty); |
Anders Carlsson | 2e744e8 | 2008-08-30 19:51:14 +0000 | [diff] [blame] | 1397 | |
| 1398 | // Get size and alignment info for this aggregate. |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1399 | CharUnits size = getContext().getTypeSizeInChars(Ty); |
Anders Carlsson | 2e744e8 | 2008-08-30 19:51:14 +0000 | [diff] [blame] | 1400 | |
John McCall | a08ffd2 | 2011-01-14 10:37:58 +0000 | [diff] [blame] | 1401 | llvm::Value *SizeVal; |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1402 | const VariableArrayType *vla; |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1403 | |
John McCall | a08ffd2 | 2011-01-14 10:37:58 +0000 | [diff] [blame] | 1404 | // Don't bother emitting a zero-byte memset. |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1405 | if (size.isZero()) { |
John McCall | a08ffd2 | 2011-01-14 10:37:58 +0000 | [diff] [blame] | 1406 | // But note that getTypeInfo returns 0 for a VLA. |
| 1407 | if (const VariableArrayType *vlaType = |
| 1408 | dyn_cast_or_null<VariableArrayType>( |
| 1409 | getContext().getAsArrayType(Ty))) { |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1410 | QualType eltType; |
| 1411 | llvm::Value *numElts; |
Benjamin Kramer | 867ea1d | 2014-03-02 13:01:17 +0000 | [diff] [blame] | 1412 | std::tie(numElts, eltType) = getVLASize(vlaType); |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1413 | |
| 1414 | SizeVal = numElts; |
| 1415 | CharUnits eltSize = getContext().getTypeSizeInChars(eltType); |
| 1416 | if (!eltSize.isOne()) |
| 1417 | SizeVal = Builder.CreateNUWMul(SizeVal, CGM.getSize(eltSize)); |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1418 | vla = vlaType; |
John McCall | a08ffd2 | 2011-01-14 10:37:58 +0000 | [diff] [blame] | 1419 | } else { |
| 1420 | return; |
| 1421 | } |
| 1422 | } else { |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1423 | SizeVal = CGM.getSize(size); |
Craig Topper | 8a13c41 | 2014-05-21 05:09:00 +0000 | [diff] [blame] | 1424 | vla = nullptr; |
John McCall | a08ffd2 | 2011-01-14 10:37:58 +0000 | [diff] [blame] | 1425 | } |
John McCall | 7cd1d97 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1426 | |
| 1427 | // If the type contains a pointer to data member we can't memset it to zero. |
| 1428 | // Instead, create a null constant and copy it to the destination. |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1429 | // TODO: there are other patterns besides zero that we can usefully memset, |
| 1430 | // like -1, which happens to be the pattern used by member-pointers. |
John McCall | 614dbdc | 2010-08-22 21:01:12 +0000 | [diff] [blame] | 1431 | if (!CGM.getTypes().isZeroInitializable(Ty)) { |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1432 | // For a VLA, emit a single element, then splat that over the VLA. |
| 1433 | if (vla) Ty = getContext().getBaseElementType(vla); |
John McCall | a08ffd2 | 2011-01-14 10:37:58 +0000 | [diff] [blame] | 1434 | |
John McCall | 7cd1d97 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1435 | llvm::Constant *NullConstant = CGM.EmitNullConstant(Ty); |
| 1436 | |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1437 | llvm::GlobalVariable *NullVariable = |
John McCall | 7cd1d97 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1438 | new llvm::GlobalVariable(CGM.getModule(), NullConstant->getType(), |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1439 | /*isConstant=*/true, |
John McCall | 7cd1d97 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1440 | llvm::GlobalVariable::PrivateLinkage, |
Chris Lattner | 0e62c1c | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1441 | NullConstant, Twine()); |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1442 | CharUnits NullAlign = DestPtr.getAlignment(); |
| 1443 | NullVariable->setAlignment(NullAlign.getQuantity()); |
| 1444 | Address SrcPtr(Builder.CreateBitCast(NullVariable, Builder.getInt8PtrTy()), |
| 1445 | NullAlign); |
John McCall | 7cd1d97 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1446 | |
John McCall | 2725aa1 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1447 | if (vla) return emitNonZeroVLAInit(*this, Ty, DestPtr, SrcPtr, SizeVal); |
| 1448 | |
John McCall | 7cd1d97 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1449 | // Get and call the appropriate llvm.memcpy overload. |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1450 | Builder.CreateMemCpy(DestPtr, SrcPtr, SizeVal, false); |
John McCall | 7cd1d97 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1451 | return; |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1452 | } |
| 1453 | |
John McCall | 7cd1d97 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1454 | // Otherwise, just memset the whole thing to zero. This is legal |
| 1455 | // because in LLVM, all default initializers (other than the ones we just |
| 1456 | // handled above) are guaranteed to have a bit pattern of all zeros. |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1457 | Builder.CreateMemSet(DestPtr, Builder.getInt8(0), SizeVal, false); |
Anders Carlsson | 2e744e8 | 2008-08-30 19:51:14 +0000 | [diff] [blame] | 1458 | } |
| 1459 | |
Chris Lattner | c8e630e | 2011-02-17 07:39:24 +0000 | [diff] [blame] | 1460 | llvm::BlockAddress *CodeGenFunction::GetAddrOfLabel(const LabelDecl *L) { |
Chris Lattner | 6c4d255 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 1461 | // Make sure that there is a block for the indirect goto. |
Craig Topper | 8a13c41 | 2014-05-21 05:09:00 +0000 | [diff] [blame] | 1462 | if (!IndirectBranch) |
Chris Lattner | 6c4d255 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 1463 | GetIndirectGotoBlock(); |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1464 | |
John McCall | ad5d61e | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 1465 | llvm::BasicBlock *BB = getJumpDestForLabel(L).getBlock(); |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1466 | |
Chris Lattner | 6c4d255 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 1467 | // Make sure the indirect branch includes all of the address-taken blocks. |
| 1468 | IndirectBranch->addDestination(BB); |
| 1469 | return llvm::BlockAddress::get(CurFn, BB); |
Chris Lattner | 2bb5cb4 | 2009-10-13 06:55:33 +0000 | [diff] [blame] | 1470 | } |
| 1471 | |
| 1472 | llvm::BasicBlock *CodeGenFunction::GetIndirectGotoBlock() { |
Chris Lattner | 6c4d255 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 1473 | // If we already made the indirect branch for indirect goto, return its block. |
| 1474 | if (IndirectBranch) return IndirectBranch->getParent(); |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1475 | |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1476 | CGBuilderTy TmpBuilder(*this, createBasicBlock("indirectgoto")); |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1477 | |
Chris Lattner | 2bb5cb4 | 2009-10-13 06:55:33 +0000 | [diff] [blame] | 1478 | // Create the PHI node that indirect gotos will add entries to. |
Jay Foad | 20c0f02 | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 1479 | llvm::Value *DestVal = TmpBuilder.CreatePHI(Int8PtrTy, 0, |
| 1480 | "indirect.goto.dest"); |
Michael Ilseman | 686240a | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1481 | |
Chris Lattner | 6c4d255 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 1482 | // Create the indirect branch instruction. |
| 1483 | IndirectBranch = TmpBuilder.CreateIndirectBr(DestVal); |
| 1484 | return IndirectBranch->getParent(); |
Daniel Dunbar | 88402ce | 2008-08-04 16:51:22 +0000 | [diff] [blame] | 1485 | } |
Anders Carlsson | 13abd7e | 2008-11-04 05:30:00 +0000 | [diff] [blame] | 1486 | |
John McCall | 82fe67b | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1487 | /// Computes the length of an array in elements, as well as the base |
| 1488 | /// element type and a properly-typed first element pointer. |
| 1489 | llvm::Value *CodeGenFunction::emitArrayLength(const ArrayType *origArrayType, |
| 1490 | QualType &baseType, |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1491 | Address &addr) { |
John McCall | 82fe67b | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1492 | const ArrayType *arrayType = origArrayType; |
| 1493 | |
| 1494 | // If it's a VLA, we have to load the stored size. Note that |
| 1495 | // this is the size of the VLA in bytes, not its size in elements. |
Craig Topper | 8a13c41 | 2014-05-21 05:09:00 +0000 | [diff] [blame] | 1496 | llvm::Value *numVLAElements = nullptr; |
John McCall | 82fe67b | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1497 | if (isa<VariableArrayType>(arrayType)) { |
| 1498 | numVLAElements = getVLASize(cast<VariableArrayType>(arrayType)).first; |
| 1499 | |
| 1500 | // Walk into all VLAs. This doesn't require changes to addr, |
| 1501 | // which has type T* where T is the first non-VLA element type. |
| 1502 | do { |
| 1503 | QualType elementType = arrayType->getElementType(); |
| 1504 | arrayType = getContext().getAsArrayType(elementType); |
| 1505 | |
| 1506 | // If we only have VLA components, 'addr' requires no adjustment. |
| 1507 | if (!arrayType) { |
| 1508 | baseType = elementType; |
| 1509 | return numVLAElements; |
| 1510 | } |
| 1511 | } while (isa<VariableArrayType>(arrayType)); |
| 1512 | |
| 1513 | // We get out here only if we find a constant array type |
| 1514 | // inside the VLA. |
| 1515 | } |
| 1516 | |
| 1517 | // We have some number of constant-length arrays, so addr should |
| 1518 | // have LLVM type [M x [N x [...]]]*. Build a GEP that walks |
| 1519 | // down to the first element of addr. |
Chris Lattner | 0e62c1c | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1520 | SmallVector<llvm::Value*, 8> gepIndices; |
John McCall | 82fe67b | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1521 | |
| 1522 | // GEP down to the array type. |
| 1523 | llvm::ConstantInt *zero = Builder.getInt32(0); |
| 1524 | gepIndices.push_back(zero); |
| 1525 | |
John McCall | 82fe67b | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1526 | uint64_t countFromCLAs = 1; |
Richard Smith | f3c37e8 | 2012-04-22 05:51:36 +0000 | [diff] [blame] | 1527 | QualType eltType; |
John McCall | 82fe67b | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1528 | |
Chris Lattner | 2192fe5 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1529 | llvm::ArrayType *llvmArrayType = |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1530 | dyn_cast<llvm::ArrayType>(addr.getElementType()); |
Richard Smith | f3c37e8 | 2012-04-22 05:51:36 +0000 | [diff] [blame] | 1531 | while (llvmArrayType) { |
John McCall | 82fe67b | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1532 | assert(isa<ConstantArrayType>(arrayType)); |
| 1533 | assert(cast<ConstantArrayType>(arrayType)->getSize().getZExtValue() |
| 1534 | == llvmArrayType->getNumElements()); |
| 1535 | |
| 1536 | gepIndices.push_back(zero); |
| 1537 | countFromCLAs *= llvmArrayType->getNumElements(); |
Richard Smith | f3c37e8 | 2012-04-22 05:51:36 +0000 | [diff] [blame] | 1538 | eltType = arrayType->getElementType(); |
John McCall | 82fe67b | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1539 | |
| 1540 | llvmArrayType = |
| 1541 | dyn_cast<llvm::ArrayType>(llvmArrayType->getElementType()); |
John McCall | 82fe67b | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1542 | arrayType = getContext().getAsArrayType(arrayType->getElementType()); |
Richard Smith | f3c37e8 | 2012-04-22 05:51:36 +0000 | [diff] [blame] | 1543 | assert((!llvmArrayType || arrayType) && |
| 1544 | "LLVM and Clang types are out-of-synch"); |
John McCall | 82fe67b | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1545 | } |
| 1546 | |
Richard Smith | f3c37e8 | 2012-04-22 05:51:36 +0000 | [diff] [blame] | 1547 | if (arrayType) { |
| 1548 | // From this point onwards, the Clang array type has been emitted |
| 1549 | // as some other type (probably a packed struct). Compute the array |
| 1550 | // size, and just emit the 'begin' expression as a bitcast. |
| 1551 | while (arrayType) { |
| 1552 | countFromCLAs *= |
| 1553 | cast<ConstantArrayType>(arrayType)->getSize().getZExtValue(); |
| 1554 | eltType = arrayType->getElementType(); |
| 1555 | arrayType = getContext().getAsArrayType(eltType); |
| 1556 | } |
John McCall | 82fe67b | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1557 | |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1558 | llvm::Type *baseType = ConvertType(eltType); |
| 1559 | addr = Builder.CreateElementBitCast(addr, baseType, "array.begin"); |
Richard Smith | f3c37e8 | 2012-04-22 05:51:36 +0000 | [diff] [blame] | 1560 | } else { |
| 1561 | // Create the actual GEP. |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1562 | addr = Address(Builder.CreateInBoundsGEP(addr.getPointer(), |
| 1563 | gepIndices, "array.begin"), |
| 1564 | addr.getAlignment()); |
Richard Smith | f3c37e8 | 2012-04-22 05:51:36 +0000 | [diff] [blame] | 1565 | } |
| 1566 | |
| 1567 | baseType = eltType; |
John McCall | 82fe67b | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1568 | |
| 1569 | llvm::Value *numElements |
| 1570 | = llvm::ConstantInt::get(SizeTy, countFromCLAs); |
| 1571 | |
| 1572 | // If we had any VLA dimensions, factor them in. |
| 1573 | if (numVLAElements) |
| 1574 | numElements = Builder.CreateNUWMul(numVLAElements, numElements); |
| 1575 | |
| 1576 | return numElements; |
| 1577 | } |
| 1578 | |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1579 | std::pair<llvm::Value*, QualType> |
| 1580 | CodeGenFunction::getVLASize(QualType type) { |
| 1581 | const VariableArrayType *vla = getContext().getAsVariableArrayType(type); |
| 1582 | assert(vla && "type was not a variable array type!"); |
| 1583 | return getVLASize(vla); |
Anders Carlsson | e388a5b | 2008-12-20 20:27:15 +0000 | [diff] [blame] | 1584 | } |
Anders Carlsson | ccbe920 | 2008-12-12 07:19:02 +0000 | [diff] [blame] | 1585 | |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1586 | std::pair<llvm::Value*, QualType> |
| 1587 | CodeGenFunction::getVLASize(const VariableArrayType *type) { |
| 1588 | // The number of elements so far; always size_t. |
Craig Topper | 8a13c41 | 2014-05-21 05:09:00 +0000 | [diff] [blame] | 1589 | llvm::Value *numElements = nullptr; |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1590 | |
| 1591 | QualType elementType; |
| 1592 | do { |
| 1593 | elementType = type->getElementType(); |
| 1594 | llvm::Value *vlaSize = VLASizeMap[type->getSizeExpr()]; |
| 1595 | assert(vlaSize && "no size for VLA!"); |
| 1596 | assert(vlaSize->getType() == SizeTy); |
| 1597 | |
| 1598 | if (!numElements) { |
| 1599 | numElements = vlaSize; |
| 1600 | } else { |
| 1601 | // It's undefined behavior if this wraps around, so mark it that way. |
Alexey Samsonov | cb3f812 | 2014-03-20 10:48:29 +0000 | [diff] [blame] | 1602 | // FIXME: Teach -fsanitize=undefined to trap this. |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1603 | numElements = Builder.CreateNUWMul(numElements, vlaSize); |
| 1604 | } |
| 1605 | } while ((type = getContext().getAsVariableArrayType(elementType))); |
| 1606 | |
| 1607 | return std::pair<llvm::Value*,QualType>(numElements, elementType); |
| 1608 | } |
| 1609 | |
| 1610 | void CodeGenFunction::EmitVariablyModifiedType(QualType type) { |
| 1611 | assert(type->isVariablyModifiedType() && |
Anders Carlsson | 8a01b79 | 2008-12-20 20:46:34 +0000 | [diff] [blame] | 1612 | "Must pass variably modified type to EmitVLASizes!"); |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1613 | |
Daniel Dunbar | b6adc43 | 2009-07-19 06:58:07 +0000 | [diff] [blame] | 1614 | EnsureInsertPoint(); |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1615 | |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1616 | // We're going to walk down into the type and look for VLA |
| 1617 | // expressions. |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1618 | do { |
| 1619 | assert(type->isVariablyModifiedType()); |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1620 | |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1621 | const Type *ty = type.getTypePtr(); |
| 1622 | switch (ty->getTypeClass()) { |
Abramo Bagnara | 1cd8368 | 2012-01-07 10:52:36 +0000 | [diff] [blame] | 1623 | |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1624 | #define TYPE(Class, Base) |
| 1625 | #define ABSTRACT_TYPE(Class, Base) |
Abramo Bagnara | 1cd8368 | 2012-01-07 10:52:36 +0000 | [diff] [blame] | 1626 | #define NON_CANONICAL_TYPE(Class, Base) |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1627 | #define DEPENDENT_TYPE(Class, Base) case Type::Class: |
Abramo Bagnara | 1cd8368 | 2012-01-07 10:52:36 +0000 | [diff] [blame] | 1628 | #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1629 | #include "clang/AST/TypeNodes.def" |
Abramo Bagnara | 1cd8368 | 2012-01-07 10:52:36 +0000 | [diff] [blame] | 1630 | llvm_unreachable("unexpected dependent type!"); |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1631 | |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1632 | // These types are never variably-modified. |
| 1633 | case Type::Builtin: |
| 1634 | case Type::Complex: |
| 1635 | case Type::Vector: |
| 1636 | case Type::ExtVector: |
| 1637 | case Type::Record: |
| 1638 | case Type::Enum: |
Abramo Bagnara | fa95ed4 | 2012-01-11 08:19:46 +0000 | [diff] [blame] | 1639 | case Type::Elaborated: |
| 1640 | case Type::TemplateSpecialization: |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1641 | case Type::ObjCObject: |
| 1642 | case Type::ObjCInterface: |
| 1643 | case Type::ObjCObjectPointer: |
| 1644 | llvm_unreachable("type class is never variably-modified!"); |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1645 | |
Reid Kleckner | 0503a87 | 2013-12-05 01:23:43 +0000 | [diff] [blame] | 1646 | case Type::Adjusted: |
| 1647 | type = cast<AdjustedType>(ty)->getAdjustedType(); |
| 1648 | break; |
| 1649 | |
Reid Kleckner | 8a36502 | 2013-06-24 17:51:48 +0000 | [diff] [blame] | 1650 | case Type::Decayed: |
| 1651 | type = cast<DecayedType>(ty)->getPointeeType(); |
| 1652 | break; |
| 1653 | |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1654 | case Type::Pointer: |
| 1655 | type = cast<PointerType>(ty)->getPointeeType(); |
| 1656 | break; |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1657 | |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1658 | case Type::BlockPointer: |
| 1659 | type = cast<BlockPointerType>(ty)->getPointeeType(); |
| 1660 | break; |
| 1661 | |
| 1662 | case Type::LValueReference: |
| 1663 | case Type::RValueReference: |
| 1664 | type = cast<ReferenceType>(ty)->getPointeeType(); |
| 1665 | break; |
| 1666 | |
| 1667 | case Type::MemberPointer: |
| 1668 | type = cast<MemberPointerType>(ty)->getPointeeType(); |
| 1669 | break; |
| 1670 | |
| 1671 | case Type::ConstantArray: |
| 1672 | case Type::IncompleteArray: |
| 1673 | // Losing element qualification here is fine. |
| 1674 | type = cast<ArrayType>(ty)->getElementType(); |
| 1675 | break; |
| 1676 | |
| 1677 | case Type::VariableArray: { |
| 1678 | // Losing element qualification here is fine. |
| 1679 | const VariableArrayType *vat = cast<VariableArrayType>(ty); |
| 1680 | |
| 1681 | // Unknown size indication requires no size computation. |
| 1682 | // Otherwise, evaluate and record it. |
| 1683 | if (const Expr *size = vat->getSizeExpr()) { |
| 1684 | // It's possible that we might have emitted this already, |
| 1685 | // e.g. with a typedef and a pointer to it. |
| 1686 | llvm::Value *&entry = VLASizeMap[size]; |
| 1687 | if (!entry) { |
Richard Smith | 481652b | 2012-10-10 01:11:12 +0000 | [diff] [blame] | 1688 | llvm::Value *Size = EmitScalarExpr(size); |
| 1689 | |
| 1690 | // C11 6.7.6.2p5: |
| 1691 | // If the size is an expression that is not an integer constant |
| 1692 | // expression [...] each time it is evaluated it shall have a value |
| 1693 | // greater than zero. |
Alexey Samsonov | edf99a9 | 2014-11-07 22:29:38 +0000 | [diff] [blame] | 1694 | if (SanOpts.has(SanitizerKind::VLABound) && |
Richard Smith | b1b0ab4 | 2012-11-05 22:21:05 +0000 | [diff] [blame] | 1695 | size->getType()->isSignedIntegerType()) { |
Alexey Samsonov | 24cad99 | 2014-07-17 18:46:27 +0000 | [diff] [blame] | 1696 | SanitizerScope SanScope(this); |
Richard Smith | 481652b | 2012-10-10 01:11:12 +0000 | [diff] [blame] | 1697 | llvm::Value *Zero = llvm::Constant::getNullValue(Size->getType()); |
| 1698 | llvm::Constant *StaticArgs[] = { |
| 1699 | EmitCheckSourceLocation(size->getLocStart()), |
| 1700 | EmitCheckTypeDescriptor(size->getType()) |
| 1701 | }; |
Alexey Samsonov | e396bfc | 2014-11-11 22:03:54 +0000 | [diff] [blame] | 1702 | EmitCheck(std::make_pair(Builder.CreateICmpSGT(Size, Zero), |
| 1703 | SanitizerKind::VLABound), |
| 1704 | "vla_bound_not_positive", StaticArgs, Size); |
Richard Smith | 481652b | 2012-10-10 01:11:12 +0000 | [diff] [blame] | 1705 | } |
| 1706 | |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1707 | // Always zexting here would be wrong if it weren't |
| 1708 | // undefined behavior to have a negative bound. |
Richard Smith | 8772bd8 | 2012-10-10 01:12:11 +0000 | [diff] [blame] | 1709 | entry = Builder.CreateIntCast(Size, SizeTy, /*signed*/ false); |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1710 | } |
| 1711 | } |
| 1712 | type = vat->getElementType(); |
| 1713 | break; |
Anders Carlsson | 8a01b79 | 2008-12-20 20:46:34 +0000 | [diff] [blame] | 1714 | } |
Mike Stump | 11289f4 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1715 | |
Abramo Bagnara | 1cd8368 | 2012-01-07 10:52:36 +0000 | [diff] [blame] | 1716 | case Type::FunctionProto: |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1717 | case Type::FunctionNoProto: |
Alp Toker | 314cc81 | 2014-01-25 16:55:45 +0000 | [diff] [blame] | 1718 | type = cast<FunctionType>(ty)->getReturnType(); |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1719 | break; |
Eli Friedman | 0dfb889 | 2011-10-06 23:00:33 +0000 | [diff] [blame] | 1720 | |
Abramo Bagnara | fa95ed4 | 2012-01-11 08:19:46 +0000 | [diff] [blame] | 1721 | case Type::Paren: |
| 1722 | case Type::TypeOf: |
| 1723 | case Type::UnaryTransform: |
| 1724 | case Type::Attributed: |
| 1725 | case Type::SubstTemplateTypeParm: |
David Blaikie | 66ed89d | 2013-07-13 21:08:08 +0000 | [diff] [blame] | 1726 | case Type::PackExpansion: |
Abramo Bagnara | fa95ed4 | 2012-01-11 08:19:46 +0000 | [diff] [blame] | 1727 | // Keep walking after single level desugaring. |
| 1728 | type = type.getSingleStepDesugaredType(getContext()); |
| 1729 | break; |
| 1730 | |
| 1731 | case Type::Typedef: |
| 1732 | case Type::Decltype: |
| 1733 | case Type::Auto: |
| 1734 | // Stop walking: nothing to do. |
| 1735 | return; |
| 1736 | |
| 1737 | case Type::TypeOfExpr: |
| 1738 | // Stop walking: emit typeof expression. |
| 1739 | EmitIgnoredExpr(cast<TypeOfExprType>(ty)->getUnderlyingExpr()); |
| 1740 | return; |
| 1741 | |
Eli Friedman | 0dfb889 | 2011-10-06 23:00:33 +0000 | [diff] [blame] | 1742 | case Type::Atomic: |
| 1743 | type = cast<AtomicType>(ty)->getValueType(); |
| 1744 | break; |
Xiuli Pan | 9c14e28 | 2016-01-09 12:53:17 +0000 | [diff] [blame] | 1745 | |
| 1746 | case Type::Pipe: |
| 1747 | type = cast<PipeType>(ty)->getElementType(); |
| 1748 | break; |
John McCall | 23c29fe | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1749 | } |
| 1750 | } while (type->isVariablyModifiedType()); |
Anders Carlsson | ccbe920 | 2008-12-12 07:19:02 +0000 | [diff] [blame] | 1751 | } |
Eli Friedman | ddea0ad | 2009-01-20 17:46:04 +0000 | [diff] [blame] | 1752 | |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1753 | Address CodeGenFunction::EmitVAListRef(const Expr* E) { |
Dan Gohman | e9e32dc | 2010-10-29 22:47:07 +0000 | [diff] [blame] | 1754 | if (getContext().getBuiltinVaListType()->isArrayType()) |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1755 | return EmitPointerWithAlignment(E); |
Eli Friedman | ddea0ad | 2009-01-20 17:46:04 +0000 | [diff] [blame] | 1756 | return EmitLValue(E).getAddress(); |
| 1757 | } |
Anders Carlsson | 15cb75a | 2009-02-07 22:53:43 +0000 | [diff] [blame] | 1758 | |
Charles Davis | c7d5c94 | 2015-09-17 20:55:33 +0000 | [diff] [blame] | 1759 | Address CodeGenFunction::EmitMSVAListRef(const Expr *E) { |
| 1760 | return EmitLValue(E).getAddress(); |
| 1761 | } |
| 1762 | |
Yunzhong Gao | 0ebf1bb | 2013-08-30 08:53:09 +0000 | [diff] [blame] | 1763 | void CodeGenFunction::EmitDeclRefExprDbgValue(const DeclRefExpr *E, |
| 1764 | llvm::Constant *Init) { |
Devang Patel | dc866e1 | 2010-08-10 17:53:33 +0000 | [diff] [blame] | 1765 | assert (Init && "Invalid DeclRefExpr initializer!"); |
Yunzhong Gao | 0ebf1bb | 2013-08-30 08:53:09 +0000 | [diff] [blame] | 1766 | if (CGDebugInfo *Dbg = getDebugInfo()) |
| 1767 | if (CGM.getCodeGenOpts().getDebugInfo() >= CodeGenOptions::LimitedDebugInfo) |
| 1768 | Dbg->EmitGlobalVariable(E->getDecl(), Init); |
Devang Patel | e03edfd | 2010-08-10 07:24:25 +0000 | [diff] [blame] | 1769 | } |
John McCall | c07a0c7 | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1770 | |
| 1771 | CodeGenFunction::PeepholeProtection |
| 1772 | CodeGenFunction::protectFromPeepholes(RValue rvalue) { |
| 1773 | // At the moment, the only aggressive peephole we do in IR gen |
| 1774 | // is trunc(zext) folding, but if we add more, we can easily |
| 1775 | // extend this protection. |
| 1776 | |
| 1777 | if (!rvalue.isScalar()) return PeepholeProtection(); |
| 1778 | llvm::Value *value = rvalue.getScalarVal(); |
| 1779 | if (!isa<llvm::ZExtInst>(value)) return PeepholeProtection(); |
| 1780 | |
| 1781 | // Just make an extra bitcast. |
| 1782 | assert(HaveInsertPoint()); |
| 1783 | llvm::Instruction *inst = new llvm::BitCastInst(value, value->getType(), "", |
| 1784 | Builder.GetInsertBlock()); |
| 1785 | |
| 1786 | PeepholeProtection protection; |
| 1787 | protection.Inst = inst; |
| 1788 | return protection; |
| 1789 | } |
| 1790 | |
| 1791 | void CodeGenFunction::unprotectFromPeepholes(PeepholeProtection protection) { |
| 1792 | if (!protection.Inst) return; |
| 1793 | |
| 1794 | // In theory, we could try to duplicate the peepholes now, but whatever. |
| 1795 | protection.Inst->eraseFromParent(); |
| 1796 | } |
Julien Lerouge | 5a6b698 | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1797 | |
| 1798 | llvm::Value *CodeGenFunction::EmitAnnotationCall(llvm::Value *AnnotationFn, |
| 1799 | llvm::Value *AnnotatedVal, |
Dmitri Gribenko | f857950 | 2013-01-12 19:30:44 +0000 | [diff] [blame] | 1800 | StringRef AnnotationStr, |
Julien Lerouge | 5a6b698 | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1801 | SourceLocation Location) { |
| 1802 | llvm::Value *Args[4] = { |
| 1803 | AnnotatedVal, |
| 1804 | Builder.CreateBitCast(CGM.EmitAnnotationString(AnnotationStr), Int8PtrTy), |
| 1805 | Builder.CreateBitCast(CGM.EmitAnnotationUnit(Location), Int8PtrTy), |
| 1806 | CGM.EmitAnnotationLineNo(Location) |
| 1807 | }; |
| 1808 | return Builder.CreateCall(AnnotationFn, Args); |
| 1809 | } |
| 1810 | |
| 1811 | void CodeGenFunction::EmitVarAnnotations(const VarDecl *D, llvm::Value *V) { |
| 1812 | assert(D->hasAttr<AnnotateAttr>() && "no annotate attribute"); |
| 1813 | // FIXME We create a new bitcast for every annotation because that's what |
| 1814 | // llvm-gcc was doing. |
Aaron Ballman | be22bcb | 2014-03-10 17:08:28 +0000 | [diff] [blame] | 1815 | for (const auto *I : D->specific_attrs<AnnotateAttr>()) |
Julien Lerouge | 5a6b698 | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1816 | EmitAnnotationCall(CGM.getIntrinsic(llvm::Intrinsic::var_annotation), |
| 1817 | Builder.CreateBitCast(V, CGM.Int8PtrTy, V->getName()), |
Aaron Ballman | be22bcb | 2014-03-10 17:08:28 +0000 | [diff] [blame] | 1818 | I->getAnnotation(), D->getLocation()); |
Julien Lerouge | 5a6b698 | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1819 | } |
| 1820 | |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1821 | Address CodeGenFunction::EmitFieldAnnotations(const FieldDecl *D, |
| 1822 | Address Addr) { |
Julien Lerouge | 5a6b698 | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1823 | assert(D->hasAttr<AnnotateAttr>() && "no annotate attribute"); |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1824 | llvm::Value *V = Addr.getPointer(); |
Julien Lerouge | 5a6b698 | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1825 | llvm::Type *VTy = V->getType(); |
| 1826 | llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::ptr_annotation, |
| 1827 | CGM.Int8PtrTy); |
| 1828 | |
Aaron Ballman | be22bcb | 2014-03-10 17:08:28 +0000 | [diff] [blame] | 1829 | for (const auto *I : D->specific_attrs<AnnotateAttr>()) { |
Julien Lerouge | 5a6b698 | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1830 | // FIXME Always emit the cast inst so we can differentiate between |
| 1831 | // annotation on the first field of a struct and annotation on the struct |
| 1832 | // itself. |
| 1833 | if (VTy != CGM.Int8PtrTy) |
| 1834 | V = Builder.Insert(new llvm::BitCastInst(V, CGM.Int8PtrTy)); |
Aaron Ballman | be22bcb | 2014-03-10 17:08:28 +0000 | [diff] [blame] | 1835 | V = EmitAnnotationCall(F, V, I->getAnnotation(), D->getLocation()); |
Julien Lerouge | 5a6b698 | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1836 | V = Builder.CreateBitCast(V, VTy); |
| 1837 | } |
| 1838 | |
John McCall | 7f416cc | 2015-09-08 08:05:57 +0000 | [diff] [blame] | 1839 | return Address(V, Addr.getAlignment()); |
Julien Lerouge | 5a6b698 | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1840 | } |
Ben Langmuir | 3b4c30b | 2013-05-09 19:17:11 +0000 | [diff] [blame] | 1841 | |
Angel Garcia Gomez | 637d1e6 | 2015-10-20 13:23:58 +0000 | [diff] [blame] | 1842 | CodeGenFunction::CGCapturedStmtInfo::~CGCapturedStmtInfo() { } |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 1843 | |
Alexey Samsonov | 24cad99 | 2014-07-17 18:46:27 +0000 | [diff] [blame] | 1844 | CodeGenFunction::SanitizerScope::SanitizerScope(CodeGenFunction *CGF) |
| 1845 | : CGF(CGF) { |
| 1846 | assert(!CGF->IsSanitizerScope); |
| 1847 | CGF->IsSanitizerScope = true; |
| 1848 | } |
| 1849 | |
| 1850 | CodeGenFunction::SanitizerScope::~SanitizerScope() { |
| 1851 | CGF->IsSanitizerScope = false; |
| 1852 | } |
| 1853 | |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 1854 | void CodeGenFunction::InsertHelper(llvm::Instruction *I, |
| 1855 | const llvm::Twine &Name, |
| 1856 | llvm::BasicBlock *BB, |
| 1857 | llvm::BasicBlock::iterator InsertPt) const { |
| 1858 | LoopStack.InsertHelper(I); |
Kostya Serebryany | 4ee6904 | 2014-08-26 02:29:59 +0000 | [diff] [blame] | 1859 | if (IsSanitizerScope) |
| 1860 | CGM.getSanitizerMetadata()->disableSanitizerForInstruction(I); |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 1861 | } |
| 1862 | |
| 1863 | template <bool PreserveNames> |
| 1864 | void CGBuilderInserter<PreserveNames>::InsertHelper( |
| 1865 | llvm::Instruction *I, const llvm::Twine &Name, llvm::BasicBlock *BB, |
| 1866 | llvm::BasicBlock::iterator InsertPt) const { |
| 1867 | llvm::IRBuilderDefaultInserter<PreserveNames>::InsertHelper(I, Name, BB, |
| 1868 | InsertPt); |
| 1869 | if (CGF) |
| 1870 | CGF->InsertHelper(I, Name, BB, InsertPt); |
| 1871 | } |
| 1872 | |
| 1873 | #ifdef NDEBUG |
| 1874 | #define PreserveNames false |
| 1875 | #else |
| 1876 | #define PreserveNames true |
| 1877 | #endif |
| 1878 | template void CGBuilderInserter<PreserveNames>::InsertHelper( |
| 1879 | llvm::Instruction *I, const llvm::Twine &Name, llvm::BasicBlock *BB, |
| 1880 | llvm::BasicBlock::iterator InsertPt) const; |
| 1881 | #undef PreserveNames |
Eric Christopher | fbfd97e | 2015-11-12 00:44:07 +0000 | [diff] [blame] | 1882 | |
David Blaikie | 5df25338 | 2015-11-12 01:09:58 +0000 | [diff] [blame] | 1883 | static bool hasRequiredFeatures(const SmallVectorImpl<StringRef> &ReqFeatures, |
Eric Christopher | ce83677 | 2015-11-14 02:38:37 +0000 | [diff] [blame] | 1884 | CodeGenModule &CGM, const FunctionDecl *FD, |
| 1885 | std::string &FirstMissing) { |
David Blaikie | 5df25338 | 2015-11-12 01:09:58 +0000 | [diff] [blame] | 1886 | // If there aren't any required features listed then go ahead and return. |
| 1887 | if (ReqFeatures.empty()) |
| 1888 | return false; |
| 1889 | |
| 1890 | // Now build up the set of caller features and verify that all the required |
| 1891 | // features are there. |
| 1892 | llvm::StringMap<bool> CallerFeatureMap; |
| 1893 | CGM.getFunctionFeatureMap(CallerFeatureMap, FD); |
| 1894 | |
| 1895 | // If we have at least one of the features in the feature list return |
| 1896 | // true, otherwise return false. |
| 1897 | return std::all_of( |
| 1898 | ReqFeatures.begin(), ReqFeatures.end(), [&](StringRef Feature) { |
| 1899 | SmallVector<StringRef, 1> OrFeatures; |
| 1900 | Feature.split(OrFeatures, "|"); |
| 1901 | return std::any_of(OrFeatures.begin(), OrFeatures.end(), |
| 1902 | [&](StringRef Feature) { |
Eric Christopher | ce83677 | 2015-11-14 02:38:37 +0000 | [diff] [blame] | 1903 | if (!CallerFeatureMap.lookup(Feature)) { |
| 1904 | FirstMissing = Feature.str(); |
| 1905 | return false; |
| 1906 | } |
| 1907 | return true; |
David Blaikie | 5df25338 | 2015-11-12 01:09:58 +0000 | [diff] [blame] | 1908 | }); |
| 1909 | }); |
| 1910 | } |
| 1911 | |
Eric Christopher | 2b2d56f | 2015-11-12 00:44:12 +0000 | [diff] [blame] | 1912 | // Emits an error if we don't have a valid set of target features for the |
| 1913 | // called function. |
Eric Christopher | fbfd97e | 2015-11-12 00:44:07 +0000 | [diff] [blame] | 1914 | void CodeGenFunction::checkTargetFeatures(const CallExpr *E, |
| 1915 | const FunctionDecl *TargetDecl) { |
| 1916 | // Early exit if this is an indirect call. |
| 1917 | if (!TargetDecl) |
| 1918 | return; |
| 1919 | |
| 1920 | // Get the current enclosing function if it exists. If it doesn't |
| 1921 | // we can't check the target features anyhow. |
| 1922 | const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(CurFuncDecl); |
| 1923 | if (!FD) |
| 1924 | return; |
| 1925 | |
Eric Christopher | 2b2d56f | 2015-11-12 00:44:12 +0000 | [diff] [blame] | 1926 | // Grab the required features for the call. For a builtin this is listed in |
| 1927 | // the td file with the default cpu, for an always_inline function this is any |
| 1928 | // listed cpu and any listed features. |
Eric Christopher | fbfd97e | 2015-11-12 00:44:07 +0000 | [diff] [blame] | 1929 | unsigned BuiltinID = TargetDecl->getBuiltinID(); |
Eric Christopher | ce83677 | 2015-11-14 02:38:37 +0000 | [diff] [blame] | 1930 | std::string MissingFeature; |
Eric Christopher | 2b2d56f | 2015-11-12 00:44:12 +0000 | [diff] [blame] | 1931 | if (BuiltinID) { |
| 1932 | SmallVector<StringRef, 1> ReqFeatures; |
| 1933 | const char *FeatureList = |
| 1934 | CGM.getContext().BuiltinInfo.getRequiredFeatures(BuiltinID); |
| 1935 | // Return if the builtin doesn't have any required features. |
| 1936 | if (!FeatureList || StringRef(FeatureList) == "") |
| 1937 | return; |
| 1938 | StringRef(FeatureList).split(ReqFeatures, ","); |
Eric Christopher | ce83677 | 2015-11-14 02:38:37 +0000 | [diff] [blame] | 1939 | if (!hasRequiredFeatures(ReqFeatures, CGM, FD, MissingFeature)) |
Eric Christopher | 2b2d56f | 2015-11-12 00:44:12 +0000 | [diff] [blame] | 1940 | CGM.getDiags().Report(E->getLocStart(), diag::err_builtin_needs_feature) |
| 1941 | << TargetDecl->getDeclName() |
| 1942 | << CGM.getContext().BuiltinInfo.getRequiredFeatures(BuiltinID); |
| 1943 | |
| 1944 | } else if (TargetDecl->hasAttr<TargetAttr>()) { |
| 1945 | // Get the required features for the callee. |
| 1946 | SmallVector<StringRef, 1> ReqFeatures; |
| 1947 | llvm::StringMap<bool> CalleeFeatureMap; |
| 1948 | CGM.getFunctionFeatureMap(CalleeFeatureMap, TargetDecl); |
Eric Christopher | b7bbc53 | 2015-11-16 18:29:59 +0000 | [diff] [blame] | 1949 | for (const auto &F : CalleeFeatureMap) { |
| 1950 | // Only positive features are "required". |
| 1951 | if (F.getValue()) |
| 1952 | ReqFeatures.push_back(F.getKey()); |
| 1953 | } |
Eric Christopher | ce83677 | 2015-11-14 02:38:37 +0000 | [diff] [blame] | 1954 | if (!hasRequiredFeatures(ReqFeatures, CGM, FD, MissingFeature)) |
Eric Christopher | 2b2d56f | 2015-11-12 00:44:12 +0000 | [diff] [blame] | 1955 | CGM.getDiags().Report(E->getLocStart(), diag::err_function_needs_feature) |
Eric Christopher | ce83677 | 2015-11-14 02:38:37 +0000 | [diff] [blame] | 1956 | << FD->getDeclName() << TargetDecl->getDeclName() << MissingFeature; |
Eric Christopher | 2b2d56f | 2015-11-12 00:44:12 +0000 | [diff] [blame] | 1957 | } |
Eric Christopher | fbfd97e | 2015-11-12 00:44:07 +0000 | [diff] [blame] | 1958 | } |