Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1 | //===--- CodeGenFunction.cpp - Emit LLVM Code from ASTs for a Function ----===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 0bc735f | 2007-12-29 19:59:25 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This coordinates the per-function state used while generating code. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "CodeGenFunction.h" |
Peter Collingbourne | a4ae229 | 2011-10-06 18:51:56 +0000 | [diff] [blame] | 15 | #include "CGCUDARuntime.h" |
John McCall | 4c40d98 | 2010-08-31 07:33:07 +0000 | [diff] [blame] | 16 | #include "CGCXXABI.h" |
Eli Friedman | 3f2af10 | 2008-05-22 01:40:10 +0000 | [diff] [blame] | 17 | #include "CGDebugInfo.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 18 | #include "CodeGenModule.h" |
Daniel Dunbar | de7fb84 | 2008-08-11 05:00:27 +0000 | [diff] [blame] | 19 | #include "clang/AST/ASTContext.h" |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 20 | #include "clang/AST/Decl.h" |
Anders Carlsson | 2b77ba8 | 2009-04-04 20:47:02 +0000 | [diff] [blame] | 21 | #include "clang/AST/DeclCXX.h" |
Mike Stump | 6a1e0eb | 2009-12-04 23:26:17 +0000 | [diff] [blame] | 22 | #include "clang/AST/StmtCXX.h" |
Guy Benyei | 1db7040 | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 23 | #include "clang/Basic/OpenCL.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 24 | #include "clang/Basic/TargetInfo.h" |
Chris Lattner | 7255a2d | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 25 | #include "clang/Frontend/CodeGenOptions.h" |
Chandler Carruth | 3b844ba | 2013-01-02 11:45:17 +0000 | [diff] [blame] | 26 | #include "llvm/IR/DataLayout.h" |
| 27 | #include "llvm/IR/Intrinsics.h" |
| 28 | #include "llvm/IR/MDBuilder.h" |
| 29 | #include "llvm/IR/Operator.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 30 | using namespace clang; |
| 31 | using namespace CodeGen; |
| 32 | |
Fariborz Jahanian | 4904bf4 | 2012-06-26 16:06:38 +0000 | [diff] [blame] | 33 | CodeGenFunction::CodeGenFunction(CodeGenModule &cgm, bool suppressNewContext) |
John McCall | 64aa4b3 | 2013-04-16 22:48:15 +0000 | [diff] [blame] | 34 | : CodeGenTypeCache(cgm), CGM(cgm), Target(cgm.getTarget()), |
Eli Friedman | cec5ebd | 2012-02-11 02:57:39 +0000 | [diff] [blame] | 35 | Builder(cgm.getModule().getContext()), |
Ben Langmuir | 524387a | 2013-05-09 19:17:11 +0000 | [diff] [blame] | 36 | CapturedStmtInfo(0), |
Will Dietz | 4f45bc0 | 2013-01-18 11:30:38 +0000 | [diff] [blame] | 37 | SanitizePerformTypeCheck(CGM.getSanOpts().Null | |
| 38 | CGM.getSanOpts().Alignment | |
| 39 | CGM.getSanOpts().ObjectSize | |
| 40 | CGM.getSanOpts().Vptr), |
| 41 | SanOpts(&CGM.getSanOpts()), |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 42 | AutoreleaseResult(false), BlockInfo(0), BlockPointer(0), |
Eli Friedman | 23f0267 | 2012-03-01 04:01:32 +0000 | [diff] [blame] | 43 | LambdaThisCaptureField(0), NormalCleanupDest(0), NextCleanupDestIndex(1), |
Eli Friedman | cec5ebd | 2012-02-11 02:57:39 +0000 | [diff] [blame] | 44 | FirstBlockInfo(0), EHResumeBlock(0), ExceptionSlot(0), EHSelectorSlot(0), |
Stephen Lin | 3258abc | 2013-06-19 23:23:19 +0000 | [diff] [blame] | 45 | DebugInfo(0), DisableDebugInfo(false), CalleeWithThisReturn(0), |
| 46 | DidCallStackSave(false), |
John McCall | 93c332a | 2011-05-28 21:13:02 +0000 | [diff] [blame] | 47 | IndirectBranch(0), SwitchInsn(0), CaseRangeBlock(0), UnreachableBlock(0), |
Adrian Prantl | d072e59 | 2013-05-03 20:11:48 +0000 | [diff] [blame] | 48 | NumReturnExprs(0), NumSimpleReturnExprs(0), |
Timur Iskhodzhanov | 59660c2 | 2013-02-13 08:37:51 +0000 | [diff] [blame] | 49 | CXXABIThisDecl(0), CXXABIThisValue(0), CXXThisValue(0), |
Richard Smith | c3bf52c | 2013-04-20 22:23:05 +0000 | [diff] [blame] | 50 | CXXDefaultInitExprThis(0), |
Timur Iskhodzhanov | 59660c2 | 2013-02-13 08:37:51 +0000 | [diff] [blame] | 51 | CXXStructorImplicitParamDecl(0), CXXStructorImplicitParamValue(0), |
Nadav Rotem | 495cfa4 | 2013-03-23 06:43:35 +0000 | [diff] [blame] | 52 | OutermostConditional(0), CurLexicalScope(0), TerminateLandingPad(0), |
Eli Friedman | cec5ebd | 2012-02-11 02:57:39 +0000 | [diff] [blame] | 53 | TerminateHandler(0), TrapBB(0) { |
Fariborz Jahanian | 4904bf4 | 2012-06-26 16:06:38 +0000 | [diff] [blame] | 54 | if (!suppressNewContext) |
| 55 | CGM.getCXXABI().getMangleContext().startNewFunction(); |
Michael Ilseman | cdeb7d5 | 2012-12-04 00:36:06 +0000 | [diff] [blame] | 56 | |
| 57 | llvm::FastMathFlags FMF; |
| 58 | if (CGM.getLangOpts().FastMath) |
Benjamin Kramer | 29573b0 | 2012-12-09 21:58:24 +0000 | [diff] [blame] | 59 | FMF.setUnsafeAlgebra(); |
Michael Ilseman | cdeb7d5 | 2012-12-04 00:36:06 +0000 | [diff] [blame] | 60 | if (CGM.getLangOpts().FiniteMathOnly) { |
Benjamin Kramer | 29573b0 | 2012-12-09 21:58:24 +0000 | [diff] [blame] | 61 | FMF.setNoNaNs(); |
| 62 | FMF.setNoInfs(); |
Michael Ilseman | cdeb7d5 | 2012-12-04 00:36:06 +0000 | [diff] [blame] | 63 | } |
| 64 | Builder.SetFastMathFlags(FMF); |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 65 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 66 | |
John McCall | 1a343eb | 2011-11-10 08:15:53 +0000 | [diff] [blame] | 67 | CodeGenFunction::~CodeGenFunction() { |
Richard Smith | 8a07cd3 | 2013-06-12 20:42:33 +0000 | [diff] [blame] | 68 | assert(LifetimeExtendedCleanupStack.empty() && "failed to emit a cleanup"); |
| 69 | |
John McCall | 1a343eb | 2011-11-10 08:15:53 +0000 | [diff] [blame] | 70 | // If there are any unclaimed block infos, go ahead and destroy them |
| 71 | // now. This can happen if IR-gen gets clever and skips evaluating |
| 72 | // something. |
| 73 | if (FirstBlockInfo) |
| 74 | destroyBlockInfos(FirstBlockInfo); |
| 75 | } |
| 76 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 77 | |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 78 | llvm::Type *CodeGenFunction::ConvertTypeForMem(QualType T) { |
Daniel Dunbar | 8b1a343 | 2009-02-03 23:03:55 +0000 | [diff] [blame] | 79 | return CGM.getTypes().ConvertTypeForMem(T); |
| 80 | } |
| 81 | |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 82 | llvm::Type *CodeGenFunction::ConvertType(QualType T) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 83 | return CGM.getTypes().ConvertType(T); |
| 84 | } |
| 85 | |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 86 | TypeEvaluationKind CodeGenFunction::getEvaluationKind(QualType type) { |
| 87 | type = type.getCanonicalType(); |
| 88 | while (true) { |
| 89 | switch (type->getTypeClass()) { |
John McCall | f2aac84 | 2011-05-15 02:34:36 +0000 | [diff] [blame] | 90 | #define TYPE(name, parent) |
| 91 | #define ABSTRACT_TYPE(name, parent) |
| 92 | #define NON_CANONICAL_TYPE(name, parent) case Type::name: |
| 93 | #define DEPENDENT_TYPE(name, parent) case Type::name: |
| 94 | #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(name, parent) case Type::name: |
| 95 | #include "clang/AST/TypeNodes.def" |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 96 | llvm_unreachable("non-canonical or dependent type in IR-generation"); |
John McCall | f2aac84 | 2011-05-15 02:34:36 +0000 | [diff] [blame] | 97 | |
Richard Smith | dc7a4f5 | 2013-04-30 13:56:41 +0000 | [diff] [blame] | 98 | case Type::Auto: |
| 99 | llvm_unreachable("undeduced auto type in IR-generation"); |
| 100 | |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 101 | // Various scalar types. |
| 102 | case Type::Builtin: |
| 103 | case Type::Pointer: |
| 104 | case Type::BlockPointer: |
| 105 | case Type::LValueReference: |
| 106 | case Type::RValueReference: |
| 107 | case Type::MemberPointer: |
| 108 | case Type::Vector: |
| 109 | case Type::ExtVector: |
| 110 | case Type::FunctionProto: |
| 111 | case Type::FunctionNoProto: |
| 112 | case Type::Enum: |
| 113 | case Type::ObjCObjectPointer: |
| 114 | return TEK_Scalar; |
John McCall | f2aac84 | 2011-05-15 02:34:36 +0000 | [diff] [blame] | 115 | |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 116 | // Complexes. |
| 117 | case Type::Complex: |
| 118 | return TEK_Complex; |
Eli Friedman | b001de7 | 2011-10-06 23:00:33 +0000 | [diff] [blame] | 119 | |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 120 | // Arrays, records, and Objective-C objects. |
| 121 | case Type::ConstantArray: |
| 122 | case Type::IncompleteArray: |
| 123 | case Type::VariableArray: |
| 124 | case Type::Record: |
| 125 | case Type::ObjCObject: |
| 126 | case Type::ObjCInterface: |
| 127 | return TEK_Aggregate; |
| 128 | |
| 129 | // We operate on atomic values according to their underlying type. |
| 130 | case Type::Atomic: |
| 131 | type = cast<AtomicType>(type)->getValueType(); |
| 132 | continue; |
| 133 | } |
| 134 | llvm_unreachable("unknown type kind!"); |
John McCall | f2aac84 | 2011-05-15 02:34:36 +0000 | [diff] [blame] | 135 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 136 | } |
| 137 | |
David Blaikie | 0a0f93c | 2013-02-01 19:09:49 +0000 | [diff] [blame] | 138 | void CodeGenFunction::EmitReturnBlock() { |
Daniel Dunbar | 1c1d607 | 2009-01-26 23:27:52 +0000 | [diff] [blame] | 139 | // For cleanliness, we try to avoid emitting the return block for |
| 140 | // simple cases. |
| 141 | llvm::BasicBlock *CurBB = Builder.GetInsertBlock(); |
| 142 | |
| 143 | if (CurBB) { |
| 144 | assert(!CurBB->getTerminator() && "Unexpected terminated block."); |
| 145 | |
Daniel Dunbar | 96e18b0 | 2009-07-19 08:24:34 +0000 | [diff] [blame] | 146 | // We have a valid insert point, reuse it if it is empty or there are no |
| 147 | // explicit jumps to the return block. |
John McCall | ff8e115 | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 148 | if (CurBB->empty() || ReturnBlock.getBlock()->use_empty()) { |
| 149 | ReturnBlock.getBlock()->replaceAllUsesWith(CurBB); |
| 150 | delete ReturnBlock.getBlock(); |
Daniel Dunbar | 96e18b0 | 2009-07-19 08:24:34 +0000 | [diff] [blame] | 151 | } else |
John McCall | ff8e115 | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 152 | EmitBlock(ReturnBlock.getBlock()); |
David Blaikie | 0a0f93c | 2013-02-01 19:09:49 +0000 | [diff] [blame] | 153 | return; |
Daniel Dunbar | 1c1d607 | 2009-01-26 23:27:52 +0000 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | // Otherwise, if the return block is the target of a single direct |
| 157 | // branch then we can just put the code in that block instead. This |
| 158 | // cleans up functions which started with a unified return block. |
John McCall | ff8e115 | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 159 | if (ReturnBlock.getBlock()->hasOneUse()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 160 | llvm::BranchInst *BI = |
John McCall | ff8e115 | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 161 | dyn_cast<llvm::BranchInst>(*ReturnBlock.getBlock()->use_begin()); |
John McCall | f1549f6 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 162 | if (BI && BI->isUnconditional() && |
John McCall | ff8e115 | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 163 | BI->getSuccessor(0) == ReturnBlock.getBlock()) { |
David Blaikie | c5139a9 | 2013-02-23 19:20:56 +0000 | [diff] [blame] | 164 | // Reset insertion point, including debug location, and delete the |
| 165 | // branch. This is really subtle and only works because the next change |
| 166 | // in location will hit the caching in CGDebugInfo::EmitLocation and not |
| 167 | // override this. |
Eric Christopher | acae011 | 2011-09-09 21:53:04 +0000 | [diff] [blame] | 168 | Builder.SetCurrentDebugLocation(BI->getDebugLoc()); |
Daniel Dunbar | 1c1d607 | 2009-01-26 23:27:52 +0000 | [diff] [blame] | 169 | Builder.SetInsertPoint(BI->getParent()); |
| 170 | BI->eraseFromParent(); |
John McCall | ff8e115 | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 171 | delete ReturnBlock.getBlock(); |
David Blaikie | 0a0f93c | 2013-02-01 19:09:49 +0000 | [diff] [blame] | 172 | return; |
Daniel Dunbar | 1c1d607 | 2009-01-26 23:27:52 +0000 | [diff] [blame] | 173 | } |
| 174 | } |
| 175 | |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 176 | // FIXME: We are at an unreachable point, there is no reason to emit the block |
| 177 | // unless it has uses. However, we still need a place to put the debug |
| 178 | // region.end for now. |
Daniel Dunbar | 1c1d607 | 2009-01-26 23:27:52 +0000 | [diff] [blame] | 179 | |
John McCall | ff8e115 | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 180 | EmitBlock(ReturnBlock.getBlock()); |
John McCall | f1549f6 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 181 | } |
| 182 | |
| 183 | static void EmitIfUsed(CodeGenFunction &CGF, llvm::BasicBlock *BB) { |
| 184 | if (!BB) return; |
| 185 | if (!BB->use_empty()) |
| 186 | return CGF.CurFn->getBasicBlockList().push_back(BB); |
| 187 | delete BB; |
Daniel Dunbar | 1c1d607 | 2009-01-26 23:27:52 +0000 | [diff] [blame] | 188 | } |
| 189 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 190 | void CodeGenFunction::FinishFunction(SourceLocation EndLoc) { |
Chris Lattner | da13870 | 2007-07-16 21:28:45 +0000 | [diff] [blame] | 191 | assert(BreakContinueStack.empty() && |
| 192 | "mismatched push/pop in break/continue stack!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 193 | |
Adrian Prantl | d072e59 | 2013-05-03 20:11:48 +0000 | [diff] [blame] | 194 | bool OnlySimpleReturnStmts = NumSimpleReturnExprs > 0 |
| 195 | && NumSimpleReturnExprs == NumReturnExprs; |
| 196 | // If the function contains only a simple return statement, the |
Adrian Prantl | 3081c6f | 2013-05-16 00:41:31 +0000 | [diff] [blame] | 197 | // location before the cleanup code becomes the last useful |
| 198 | // breakpoint in the function, because the simple return expression |
| 199 | // will be evaluated after the cleanup code. To be safe, set the |
| 200 | // debug location for cleanup code to the location of the return |
| 201 | // statement. Otherwise the cleanup code should be at the end of the |
| 202 | // function's lexical scope. |
Adrian Prantl | fa6b079 | 2013-05-02 17:30:20 +0000 | [diff] [blame] | 203 | if (CGDebugInfo *DI = getDebugInfo()) { |
Adrian Prantl | d072e59 | 2013-05-03 20:11:48 +0000 | [diff] [blame] | 204 | if (OnlySimpleReturnStmts) |
Adrian Prantl | ece7ebd | 2013-05-30 18:12:20 +0000 | [diff] [blame] | 205 | DI->EmitLocation(Builder, LastStopPoint); |
Adrian Prantl | fa6b079 | 2013-05-02 17:30:20 +0000 | [diff] [blame] | 206 | else |
| 207 | DI->EmitLocation(Builder, EndLoc); |
| 208 | } |
David Blaikie | 0a0f93c | 2013-02-01 19:09:49 +0000 | [diff] [blame] | 209 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 210 | // Pop any cleanups that might have been associated with the |
| 211 | // parameters. Do this in whatever block we're currently in; it's |
| 212 | // important to do this before we enter the return block or return |
| 213 | // edges will be *really* confused. |
Adrian Prantl | fa6b079 | 2013-05-02 17:30:20 +0000 | [diff] [blame] | 214 | bool EmitRetDbgLoc = true; |
| 215 | if (EHStack.stable_begin() != PrologueCleanupDepth) { |
Adrian Prantl | 1c3db76 | 2013-05-16 00:41:26 +0000 | [diff] [blame] | 216 | PopCleanupBlocks(PrologueCleanupDepth); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 217 | |
Adrian Prantl | fa6b079 | 2013-05-02 17:30:20 +0000 | [diff] [blame] | 218 | // Make sure the line table doesn't jump back into the body for |
| 219 | // the ret after it's been at EndLoc. |
| 220 | EmitRetDbgLoc = false; |
| 221 | |
| 222 | if (CGDebugInfo *DI = getDebugInfo()) |
Adrian Prantl | d072e59 | 2013-05-03 20:11:48 +0000 | [diff] [blame] | 223 | if (OnlySimpleReturnStmts) |
Adrian Prantl | fa6b079 | 2013-05-02 17:30:20 +0000 | [diff] [blame] | 224 | DI->EmitLocation(Builder, EndLoc); |
| 225 | } |
| 226 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 227 | // Emit function epilog (to return). |
David Blaikie | 0a0f93c | 2013-02-01 19:09:49 +0000 | [diff] [blame] | 228 | EmitReturnBlock(); |
Daniel Dunbar | f5bd45c | 2008-11-11 20:59:54 +0000 | [diff] [blame] | 229 | |
Daniel Dunbar | a18652f | 2011-02-10 17:32:22 +0000 | [diff] [blame] | 230 | if (ShouldInstrumentFunction()) |
| 231 | EmitFunctionInstrumentation("__cyg_profile_func_exit"); |
Chris Lattner | 7255a2d | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 232 | |
Daniel Dunbar | f5bd45c | 2008-11-11 20:59:54 +0000 | [diff] [blame] | 233 | // Emit debug descriptor for function end. |
Anders Carlsson | e896d98 | 2009-02-13 08:11:52 +0000 | [diff] [blame] | 234 | if (CGDebugInfo *DI = getDebugInfo()) { |
Devang Patel | 5a6fbcf | 2010-07-22 22:29:16 +0000 | [diff] [blame] | 235 | DI->EmitFunctionEnd(Builder); |
Daniel Dunbar | f5bd45c | 2008-11-11 20:59:54 +0000 | [diff] [blame] | 236 | } |
| 237 | |
Adrian Prantl | fa6b079 | 2013-05-02 17:30:20 +0000 | [diff] [blame] | 238 | EmitFunctionEpilog(*CurFnInfo, EmitRetDbgLoc); |
Mike Stump | cce3d4f | 2009-12-07 23:38:24 +0000 | [diff] [blame] | 239 | EmitEndEHSpec(CurCodeDecl); |
Daniel Dunbar | 5ca2084 | 2008-09-09 21:00:17 +0000 | [diff] [blame] | 240 | |
John McCall | f1549f6 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 241 | assert(EHStack.empty() && |
| 242 | "did not remove all scopes from cleanup stack!"); |
| 243 | |
Chris Lattner | d9becd1 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 244 | // If someone did an indirect goto, emit the indirect goto block at the end of |
| 245 | // the function. |
| 246 | if (IndirectBranch) { |
| 247 | EmitBlock(IndirectBranch->getParent()); |
| 248 | Builder.ClearInsertionPoint(); |
| 249 | } |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 250 | |
Chris Lattner | 5a2fa14 | 2007-12-02 06:32:24 +0000 | [diff] [blame] | 251 | // Remove the AllocaInsertPt instruction, which is just a convenience for us. |
Chris Lattner | 481769b | 2009-03-31 22:17:44 +0000 | [diff] [blame] | 252 | llvm::Instruction *Ptr = AllocaInsertPt; |
Chris Lattner | 5a2fa14 | 2007-12-02 06:32:24 +0000 | [diff] [blame] | 253 | AllocaInsertPt = 0; |
Chris Lattner | 481769b | 2009-03-31 22:17:44 +0000 | [diff] [blame] | 254 | Ptr->eraseFromParent(); |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 255 | |
Chris Lattner | d9becd1 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 256 | // If someone took the address of a label but never did an indirect goto, we |
| 257 | // made a zero entry PHI node, which is illegal, zap it now. |
| 258 | if (IndirectBranch) { |
| 259 | llvm::PHINode *PN = cast<llvm::PHINode>(IndirectBranch->getAddress()); |
| 260 | if (PN->getNumIncomingValues() == 0) { |
| 261 | PN->replaceAllUsesWith(llvm::UndefValue::get(PN->getType())); |
| 262 | PN->eraseFromParent(); |
| 263 | } |
| 264 | } |
John McCall | f1549f6 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 265 | |
John McCall | 777d6e5 | 2011-08-11 02:22:43 +0000 | [diff] [blame] | 266 | EmitIfUsed(*this, EHResumeBlock); |
John McCall | f1549f6 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 267 | EmitIfUsed(*this, TerminateLandingPad); |
| 268 | EmitIfUsed(*this, TerminateHandler); |
| 269 | EmitIfUsed(*this, UnreachableBlock); |
John McCall | 744016d | 2010-07-06 23:57:41 +0000 | [diff] [blame] | 270 | |
| 271 | if (CGM.getCodeGenOpts().EmitDeclMetadata) |
| 272 | EmitDeclMetadata(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 273 | } |
| 274 | |
Chris Lattner | 7255a2d | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 275 | /// ShouldInstrumentFunction - Return true if the current function should be |
| 276 | /// instrumented with __cyg_profile_func_* calls |
| 277 | bool CodeGenFunction::ShouldInstrumentFunction() { |
| 278 | if (!CGM.getCodeGenOpts().InstrumentFunctions) |
| 279 | return false; |
Ted Kremenek | 7aa488a | 2011-05-16 23:49:20 +0000 | [diff] [blame] | 280 | if (!CurFuncDecl || CurFuncDecl->hasAttr<NoInstrumentFunctionAttr>()) |
Chris Lattner | 7255a2d | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 281 | return false; |
| 282 | return true; |
| 283 | } |
| 284 | |
| 285 | /// EmitFunctionInstrumentation - Emit LLVM code to call the specified |
| 286 | /// instrumentation function with the current function and the call site, if |
| 287 | /// function instrumentation is enabled. |
| 288 | void CodeGenFunction::EmitFunctionInstrumentation(const char *Fn) { |
Chris Lattner | 8dab657 | 2010-06-23 05:21:28 +0000 | [diff] [blame] | 289 | // void __cyg_profile_func_{enter,exit} (void *this_fn, void *call_site); |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 290 | llvm::PointerType *PointerTy = Int8PtrTy; |
| 291 | llvm::Type *ProfileFuncArgs[] = { PointerTy, PointerTy }; |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 292 | llvm::FunctionType *FunctionTy = |
Chris Lattner | 8b41868 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 293 | llvm::FunctionType::get(VoidTy, ProfileFuncArgs, false); |
Chris Lattner | 7255a2d | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 294 | |
| 295 | llvm::Constant *F = CGM.CreateRuntimeFunction(FunctionTy, Fn); |
| 296 | llvm::CallInst *CallSite = Builder.CreateCall( |
Benjamin Kramer | 8dd55a3 | 2011-07-14 17:45:50 +0000 | [diff] [blame] | 297 | CGM.getIntrinsic(llvm::Intrinsic::returnaddress), |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 298 | llvm::ConstantInt::get(Int32Ty, 0), |
Chris Lattner | 7255a2d | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 299 | "callsite"); |
| 300 | |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 301 | llvm::Value *args[] = { |
| 302 | llvm::ConstantExpr::getBitCast(CurFn, PointerTy), |
| 303 | CallSite |
| 304 | }; |
| 305 | |
| 306 | EmitNounwindRuntimeCall(F, args); |
Chris Lattner | 7255a2d | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 307 | } |
| 308 | |
Roman Divacky | be4c870 | 2011-02-10 16:52:03 +0000 | [diff] [blame] | 309 | void CodeGenFunction::EmitMCountInstrumentation() { |
Chris Lattner | 8b41868 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 310 | llvm::FunctionType *FTy = llvm::FunctionType::get(VoidTy, false); |
Roman Divacky | be4c870 | 2011-02-10 16:52:03 +0000 | [diff] [blame] | 311 | |
John McCall | 64aa4b3 | 2013-04-16 22:48:15 +0000 | [diff] [blame] | 312 | llvm::Constant *MCountFn = |
| 313 | CGM.CreateRuntimeFunction(FTy, getTarget().getMCountName()); |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 314 | EmitNounwindRuntimeCall(MCountFn); |
Roman Divacky | be4c870 | 2011-02-10 16:52:03 +0000 | [diff] [blame] | 315 | } |
| 316 | |
Tanya Lattner | 198871c | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 317 | // OpenCL v1.2 s5.6.4.6 allows the compiler to store kernel argument |
| 318 | // information in the program executable. The argument information stored |
| 319 | // includes the argument name, its type, the address and access qualifiers used. |
Tanya Lattner | 198871c | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 320 | static void GenOpenCLArgMetadata(const FunctionDecl *FD, llvm::Function *Fn, |
| 321 | CodeGenModule &CGM,llvm::LLVMContext &Context, |
Guy Benyei | 1db7040 | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 322 | SmallVector <llvm::Value*, 5> &kernelMDArgs, |
| 323 | CGBuilderTy& Builder, ASTContext &ASTCtx) { |
| 324 | // Create MDNodes that represent the kernel arg metadata. |
Tanya Lattner | 198871c | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 325 | // Each MDNode is a list in the form of "key", N number of values which is |
| 326 | // the same number of values as their are kernel arguments. |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 327 | |
Guy Benyei | 1db7040 | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 328 | // MDNode for the kernel argument address space qualifiers. |
| 329 | SmallVector<llvm::Value*, 8> addressQuals; |
| 330 | addressQuals.push_back(llvm::MDString::get(Context, "kernel_arg_addr_space")); |
| 331 | |
| 332 | // MDNode for the kernel argument access qualifiers (images only). |
| 333 | SmallVector<llvm::Value*, 8> accessQuals; |
| 334 | accessQuals.push_back(llvm::MDString::get(Context, "kernel_arg_access_qual")); |
| 335 | |
| 336 | // MDNode for the kernel argument type names. |
| 337 | SmallVector<llvm::Value*, 8> argTypeNames; |
| 338 | argTypeNames.push_back(llvm::MDString::get(Context, "kernel_arg_type")); |
| 339 | |
| 340 | // MDNode for the kernel argument type qualifiers. |
| 341 | SmallVector<llvm::Value*, 8> argTypeQuals; |
| 342 | argTypeQuals.push_back(llvm::MDString::get(Context, "kernel_arg_type_qual")); |
| 343 | |
Tanya Lattner | 198871c | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 344 | // MDNode for the kernel argument names. |
| 345 | SmallVector<llvm::Value*, 8> argNames; |
| 346 | argNames.push_back(llvm::MDString::get(Context, "kernel_arg_name")); |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 347 | |
Tanya Lattner | 198871c | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 348 | for (unsigned i = 0, e = FD->getNumParams(); i != e; ++i) { |
| 349 | const ParmVarDecl *parm = FD->getParamDecl(i); |
Guy Benyei | 1db7040 | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 350 | QualType ty = parm->getType(); |
| 351 | std::string typeQuals; |
| 352 | |
| 353 | if (ty->isPointerType()) { |
| 354 | QualType pointeeTy = ty->getPointeeType(); |
| 355 | |
| 356 | // Get address qualifier. |
| 357 | addressQuals.push_back(Builder.getInt32(ASTCtx.getTargetAddressSpace( |
| 358 | pointeeTy.getAddressSpace()))); |
| 359 | |
| 360 | // Get argument type name. |
| 361 | std::string typeName = pointeeTy.getUnqualifiedType().getAsString() + "*"; |
| 362 | |
| 363 | // Turn "unsigned type" to "utype" |
| 364 | std::string::size_type pos = typeName.find("unsigned"); |
Benjamin Kramer | f449244 | 2013-03-24 16:04:55 +0000 | [diff] [blame] | 365 | if (pos != std::string::npos) |
| 366 | typeName.erase(pos+1, 8); |
Guy Benyei | 1db7040 | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 367 | |
| 368 | argTypeNames.push_back(llvm::MDString::get(Context, typeName)); |
| 369 | |
| 370 | // Get argument type qualifiers: |
| 371 | if (ty.isRestrictQualified()) |
| 372 | typeQuals = "restrict"; |
| 373 | if (pointeeTy.isConstQualified() || |
| 374 | (pointeeTy.getAddressSpace() == LangAS::opencl_constant)) |
Benjamin Kramer | f449244 | 2013-03-24 16:04:55 +0000 | [diff] [blame] | 375 | typeQuals += typeQuals.empty() ? "const" : " const"; |
Guy Benyei | 1db7040 | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 376 | if (pointeeTy.isVolatileQualified()) |
Benjamin Kramer | f449244 | 2013-03-24 16:04:55 +0000 | [diff] [blame] | 377 | typeQuals += typeQuals.empty() ? "volatile" : " volatile"; |
Guy Benyei | 1db7040 | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 378 | } else { |
| 379 | addressQuals.push_back(Builder.getInt32(0)); |
| 380 | |
| 381 | // Get argument type name. |
| 382 | std::string typeName = ty.getUnqualifiedType().getAsString(); |
| 383 | |
| 384 | // Turn "unsigned type" to "utype" |
| 385 | std::string::size_type pos = typeName.find("unsigned"); |
Benjamin Kramer | f449244 | 2013-03-24 16:04:55 +0000 | [diff] [blame] | 386 | if (pos != std::string::npos) |
| 387 | typeName.erase(pos+1, 8); |
Guy Benyei | 1db7040 | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 388 | |
| 389 | argTypeNames.push_back(llvm::MDString::get(Context, typeName)); |
| 390 | |
| 391 | // Get argument type qualifiers: |
| 392 | if (ty.isConstQualified()) |
| 393 | typeQuals = "const"; |
| 394 | if (ty.isVolatileQualified()) |
Benjamin Kramer | f449244 | 2013-03-24 16:04:55 +0000 | [diff] [blame] | 395 | typeQuals += typeQuals.empty() ? "volatile" : " volatile"; |
Guy Benyei | 1db7040 | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | argTypeQuals.push_back(llvm::MDString::get(Context, typeQuals)); |
| 399 | |
| 400 | // Get image access qualifier: |
| 401 | if (ty->isImageType()) { |
| 402 | if (parm->hasAttr<OpenCLImageAccessAttr>() && |
| 403 | parm->getAttr<OpenCLImageAccessAttr>()->getAccess() == CLIA_write_only) |
| 404 | accessQuals.push_back(llvm::MDString::get(Context, "write_only")); |
| 405 | else |
| 406 | accessQuals.push_back(llvm::MDString::get(Context, "read_only")); |
| 407 | } else |
| 408 | accessQuals.push_back(llvm::MDString::get(Context, "none")); |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 409 | |
Tanya Lattner | 198871c | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 410 | // Get argument name. |
| 411 | argNames.push_back(llvm::MDString::get(Context, parm->getName())); |
Tanya Lattner | 198871c | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 412 | } |
Guy Benyei | 1db7040 | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 413 | |
| 414 | kernelMDArgs.push_back(llvm::MDNode::get(Context, addressQuals)); |
| 415 | kernelMDArgs.push_back(llvm::MDNode::get(Context, accessQuals)); |
| 416 | kernelMDArgs.push_back(llvm::MDNode::get(Context, argTypeNames)); |
| 417 | kernelMDArgs.push_back(llvm::MDNode::get(Context, argTypeQuals)); |
Tanya Lattner | 198871c | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 418 | kernelMDArgs.push_back(llvm::MDNode::get(Context, argNames)); |
| 419 | } |
| 420 | |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 421 | void CodeGenFunction::EmitOpenCLKernelMetadata(const FunctionDecl *FD, |
Tanya Lattner | 0df579e | 2012-07-09 22:06:01 +0000 | [diff] [blame] | 422 | llvm::Function *Fn) |
| 423 | { |
| 424 | if (!FD->hasAttr<OpenCLKernelAttr>()) |
| 425 | return; |
| 426 | |
| 427 | llvm::LLVMContext &Context = getLLVMContext(); |
| 428 | |
Dmitri Gribenko | cfa88f8 | 2013-01-12 19:30:44 +0000 | [diff] [blame] | 429 | SmallVector <llvm::Value*, 5> kernelMDArgs; |
Tanya Lattner | 0df579e | 2012-07-09 22:06:01 +0000 | [diff] [blame] | 430 | kernelMDArgs.push_back(Fn); |
| 431 | |
Tanya Lattner | 198871c | 2012-07-11 23:02:10 +0000 | [diff] [blame] | 432 | if (CGM.getCodeGenOpts().EmitOpenCLArgMetadata) |
Guy Benyei | 1db7040 | 2013-03-24 13:58:12 +0000 | [diff] [blame] | 433 | GenOpenCLArgMetadata(FD, Fn, CGM, Context, kernelMDArgs, |
| 434 | Builder, getContext()); |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 435 | |
Joey Gouly | 37453b9 | 2013-03-08 09:42:32 +0000 | [diff] [blame] | 436 | if (FD->hasAttr<VecTypeHintAttr>()) { |
| 437 | VecTypeHintAttr *attr = FD->getAttr<VecTypeHintAttr>(); |
| 438 | QualType hintQTy = attr->getTypeHint(); |
| 439 | const ExtVectorType *hintEltQTy = hintQTy->getAs<ExtVectorType>(); |
| 440 | bool isSignedInteger = |
| 441 | hintQTy->isSignedIntegerType() || |
| 442 | (hintEltQTy && hintEltQTy->getElementType()->isSignedIntegerType()); |
| 443 | llvm::Value *attrMDArgs[] = { |
| 444 | llvm::MDString::get(Context, "vec_type_hint"), |
| 445 | llvm::UndefValue::get(CGM.getTypes().ConvertType(attr->getTypeHint())), |
| 446 | llvm::ConstantInt::get( |
| 447 | llvm::IntegerType::get(Context, 32), |
| 448 | llvm::APInt(32, (uint64_t)(isSignedInteger ? 1 : 0))) |
| 449 | }; |
| 450 | kernelMDArgs.push_back(llvm::MDNode::get(Context, attrMDArgs)); |
| 451 | } |
| 452 | |
Tanya Lattner | 0df579e | 2012-07-09 22:06:01 +0000 | [diff] [blame] | 453 | if (FD->hasAttr<WorkGroupSizeHintAttr>()) { |
Tanya Lattner | 0df579e | 2012-07-09 22:06:01 +0000 | [diff] [blame] | 454 | WorkGroupSizeHintAttr *attr = FD->getAttr<WorkGroupSizeHintAttr>(); |
Benjamin Kramer | 8fd8ee9 | 2012-11-15 16:40:35 +0000 | [diff] [blame] | 455 | llvm::Value *attrMDArgs[] = { |
| 456 | llvm::MDString::get(Context, "work_group_size_hint"), |
| 457 | Builder.getInt32(attr->getXDim()), |
| 458 | Builder.getInt32(attr->getYDim()), |
| 459 | Builder.getInt32(attr->getZDim()) |
| 460 | }; |
Tanya Lattner | 0df579e | 2012-07-09 22:06:01 +0000 | [diff] [blame] | 461 | kernelMDArgs.push_back(llvm::MDNode::get(Context, attrMDArgs)); |
| 462 | } |
| 463 | |
| 464 | if (FD->hasAttr<ReqdWorkGroupSizeAttr>()) { |
Tanya Lattner | 0df579e | 2012-07-09 22:06:01 +0000 | [diff] [blame] | 465 | ReqdWorkGroupSizeAttr *attr = FD->getAttr<ReqdWorkGroupSizeAttr>(); |
Benjamin Kramer | 8fd8ee9 | 2012-11-15 16:40:35 +0000 | [diff] [blame] | 466 | llvm::Value *attrMDArgs[] = { |
| 467 | llvm::MDString::get(Context, "reqd_work_group_size"), |
| 468 | Builder.getInt32(attr->getXDim()), |
| 469 | Builder.getInt32(attr->getYDim()), |
| 470 | Builder.getInt32(attr->getZDim()) |
| 471 | }; |
Tanya Lattner | 0df579e | 2012-07-09 22:06:01 +0000 | [diff] [blame] | 472 | kernelMDArgs.push_back(llvm::MDNode::get(Context, attrMDArgs)); |
| 473 | } |
| 474 | |
| 475 | llvm::MDNode *kernelMDNode = llvm::MDNode::get(Context, kernelMDArgs); |
| 476 | llvm::NamedMDNode *OpenCLKernelMetadata = |
| 477 | CGM.getModule().getOrInsertNamedMetadata("opencl.kernels"); |
| 478 | OpenCLKernelMetadata->addOperand(kernelMDNode); |
| 479 | } |
| 480 | |
John McCall | f5ebf9b | 2013-05-03 07:33:41 +0000 | [diff] [blame] | 481 | void CodeGenFunction::StartFunction(GlobalDecl GD, |
| 482 | QualType RetTy, |
Daniel Dunbar | 7c08651 | 2008-09-09 23:14:03 +0000 | [diff] [blame] | 483 | llvm::Function *Fn, |
John McCall | d26bc76 | 2011-03-09 04:27:21 +0000 | [diff] [blame] | 484 | const CGFunctionInfo &FnInfo, |
Daniel Dunbar | 2284ac9 | 2008-10-18 18:22:23 +0000 | [diff] [blame] | 485 | const FunctionArgList &Args, |
Tilmann Scheller | 9c6082f | 2011-03-02 21:36:49 +0000 | [diff] [blame] | 486 | SourceLocation StartLoc) { |
Anders Carlsson | 0ff8baf | 2009-09-11 00:07:24 +0000 | [diff] [blame] | 487 | const Decl *D = GD.getDecl(); |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 488 | |
Anders Carlsson | 4cc1a47 | 2009-02-09 20:20:56 +0000 | [diff] [blame] | 489 | DidCallStackSave = false; |
John McCall | f5ebf9b | 2013-05-03 07:33:41 +0000 | [diff] [blame] | 490 | CurCodeDecl = D; |
| 491 | CurFuncDecl = (D ? D->getNonClosureContext() : 0); |
Daniel Dunbar | 7c08651 | 2008-09-09 23:14:03 +0000 | [diff] [blame] | 492 | FnRetTy = RetTy; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 493 | CurFn = Fn; |
John McCall | d26bc76 | 2011-03-09 04:27:21 +0000 | [diff] [blame] | 494 | CurFnInfo = &FnInfo; |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 495 | assert(CurFn->isDeclaration() && "Function already has body?"); |
| 496 | |
Will Dietz | 4f45bc0 | 2013-01-18 11:30:38 +0000 | [diff] [blame] | 497 | if (CGM.getSanitizerBlacklist().isIn(*Fn)) { |
| 498 | SanOpts = &SanitizerOptions::Disabled; |
| 499 | SanitizePerformTypeCheck = false; |
| 500 | } |
| 501 | |
Jakob Stoklund Olesen | a3fe284 | 2010-02-09 00:10:00 +0000 | [diff] [blame] | 502 | // Pass inline keyword to optimizer if it appears explicitly on any |
| 503 | // declaration. |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 504 | if (!CGM.getCodeGenOpts().NoInline) |
Chad Rosier | 8fbe385 | 2012-03-14 23:32:11 +0000 | [diff] [blame] | 505 | if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D)) |
| 506 | for (FunctionDecl::redecl_iterator RI = FD->redecls_begin(), |
| 507 | RE = FD->redecls_end(); RI != RE; ++RI) |
| 508 | if (RI->isInlineSpecified()) { |
Bill Wendling | 72390b3 | 2012-12-20 19:27:06 +0000 | [diff] [blame] | 509 | Fn->addFnAttr(llvm::Attribute::InlineHint); |
Chad Rosier | 8fbe385 | 2012-03-14 23:32:11 +0000 | [diff] [blame] | 510 | break; |
| 511 | } |
Jakob Stoklund Olesen | a3fe284 | 2010-02-09 00:10:00 +0000 | [diff] [blame] | 512 | |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 513 | if (getLangOpts().OpenCL) { |
Peter Collingbourne | f315fa8 | 2011-02-14 01:42:53 +0000 | [diff] [blame] | 514 | // Add metadata for a kernel function. |
| 515 | if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D)) |
Tanya Lattner | 0df579e | 2012-07-09 22:06:01 +0000 | [diff] [blame] | 516 | EmitOpenCLKernelMetadata(FD, Fn); |
Peter Collingbourne | f315fa8 | 2011-02-14 01:42:53 +0000 | [diff] [blame] | 517 | } |
| 518 | |
Daniel Dunbar | 55e8742 | 2008-11-11 02:29:29 +0000 | [diff] [blame] | 519 | llvm::BasicBlock *EntryBB = createBasicBlock("entry", CurFn); |
Daniel Dunbar | 5ca2084 | 2008-09-09 21:00:17 +0000 | [diff] [blame] | 520 | |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 521 | // Create a marker to make it easy to insert allocas into the entryblock |
| 522 | // later. Don't create this with the builder, because we don't want it |
| 523 | // folded. |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 524 | llvm::Value *Undef = llvm::UndefValue::get(Int32Ty); |
| 525 | AllocaInsertPt = new llvm::BitCastInst(Undef, Int32Ty, "", EntryBB); |
Chris Lattner | f146684 | 2009-03-22 00:24:14 +0000 | [diff] [blame] | 526 | if (Builder.isNamePreserving()) |
| 527 | AllocaInsertPt->setName("allocapt"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 528 | |
John McCall | f1549f6 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 529 | ReturnBlock = getJumpDestInCurrentScope("return"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 530 | |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 531 | Builder.SetInsertPoint(EntryBB); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 532 | |
Sanjiv Gupta | af99417 | 2008-07-04 11:04:26 +0000 | [diff] [blame] | 533 | // Emit subprogram debug descriptor. |
Anders Carlsson | e896d98 | 2009-02-13 08:11:52 +0000 | [diff] [blame] | 534 | if (CGDebugInfo *DI = getDebugInfo()) { |
Jordan Rose | bea522f | 2013-03-08 21:51:21 +0000 | [diff] [blame] | 535 | SmallVector<QualType, 16> ArgTypes; |
Eric Christopher | 0625366 | 2011-10-21 23:30:10 +0000 | [diff] [blame] | 536 | for (FunctionArgList::const_iterator i = Args.begin(), e = Args.end(); |
| 537 | i != e; ++i) { |
Jordan Rose | bea522f | 2013-03-08 21:51:21 +0000 | [diff] [blame] | 538 | ArgTypes.push_back((*i)->getType()); |
Eric Christopher | 0625366 | 2011-10-21 23:30:10 +0000 | [diff] [blame] | 539 | } |
| 540 | |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 541 | QualType FnType = |
Jordan Rose | bea522f | 2013-03-08 21:51:21 +0000 | [diff] [blame] | 542 | getContext().getFunctionType(RetTy, ArgTypes, |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 543 | FunctionProtoType::ExtProtoInfo()); |
| 544 | |
Daniel Dunbar | 2284ac9 | 2008-10-18 18:22:23 +0000 | [diff] [blame] | 545 | DI->setLocation(StartLoc); |
Devang Patel | 9c6c3a0 | 2010-01-14 00:36:21 +0000 | [diff] [blame] | 546 | DI->EmitFunctionStart(GD, FnType, CurFn, Builder); |
Sanjiv Gupta | af99417 | 2008-07-04 11:04:26 +0000 | [diff] [blame] | 547 | } |
| 548 | |
Daniel Dunbar | a18652f | 2011-02-10 17:32:22 +0000 | [diff] [blame] | 549 | if (ShouldInstrumentFunction()) |
| 550 | EmitFunctionInstrumentation("__cyg_profile_func_enter"); |
Chris Lattner | 7255a2d | 2010-06-22 00:03:40 +0000 | [diff] [blame] | 551 | |
Roman Divacky | be4c870 | 2011-02-10 16:52:03 +0000 | [diff] [blame] | 552 | if (CGM.getCodeGenOpts().InstrumentForProfiling) |
| 553 | EmitMCountInstrumentation(); |
| 554 | |
Eli Friedman | b17daf9 | 2009-12-04 02:43:40 +0000 | [diff] [blame] | 555 | if (RetTy->isVoidType()) { |
| 556 | // Void type; nothing to return. |
| 557 | ReturnValue = 0; |
| 558 | } else if (CurFnInfo->getReturnInfo().getKind() == ABIArgInfo::Indirect && |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 559 | !hasScalarEvaluationKind(CurFnInfo->getReturnType())) { |
Eli Friedman | b17daf9 | 2009-12-04 02:43:40 +0000 | [diff] [blame] | 560 | // Indirect aggregate return; emit returned value directly into sret slot. |
Daniel Dunbar | 647a1ec | 2010-02-16 19:45:20 +0000 | [diff] [blame] | 561 | // This reduces code size, and affects correctness in C++. |
Eli Friedman | b17daf9 | 2009-12-04 02:43:40 +0000 | [diff] [blame] | 562 | ReturnValue = CurFn->arg_begin(); |
| 563 | } else { |
Daniel Dunbar | 647a1ec | 2010-02-16 19:45:20 +0000 | [diff] [blame] | 564 | ReturnValue = CreateIRTemp(RetTy, "retval"); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 565 | |
| 566 | // Tell the epilog emitter to autorelease the result. We do this |
| 567 | // now so that various specialized functions can suppress it |
| 568 | // during their IR-generation. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 569 | if (getLangOpts().ObjCAutoRefCount && |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 570 | !CurFnInfo->isReturnsRetained() && |
| 571 | RetTy->isObjCRetainableType()) |
| 572 | AutoreleaseResult = true; |
Eli Friedman | b17daf9 | 2009-12-04 02:43:40 +0000 | [diff] [blame] | 573 | } |
| 574 | |
Mike Stump | cce3d4f | 2009-12-07 23:38:24 +0000 | [diff] [blame] | 575 | EmitStartEHSpec(CurCodeDecl); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 576 | |
| 577 | PrologueCleanupDepth = EHStack.stable_begin(); |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 578 | EmitFunctionProlog(*CurFnInfo, CurFn, Args); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 579 | |
Eli Friedman | cec5ebd | 2012-02-11 02:57:39 +0000 | [diff] [blame] | 580 | if (D && isa<CXXMethodDecl>(D) && cast<CXXMethodDecl>(D)->isInstance()) { |
John McCall | 4c40d98 | 2010-08-31 07:33:07 +0000 | [diff] [blame] | 581 | CGM.getCXXABI().EmitInstanceFunctionProlog(*this); |
Eli Friedman | cec5ebd | 2012-02-11 02:57:39 +0000 | [diff] [blame] | 582 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(D); |
| 583 | if (MD->getParent()->isLambda() && |
| 584 | MD->getOverloadedOperator() == OO_Call) { |
| 585 | // We're in a lambda; figure out the captures. |
| 586 | MD->getParent()->getCaptureFields(LambdaCaptureFields, |
| 587 | LambdaThisCaptureField); |
| 588 | if (LambdaThisCaptureField) { |
| 589 | // If this lambda captures this, load it. |
John McCall | f5ebf9b | 2013-05-03 07:33:41 +0000 | [diff] [blame] | 590 | LValue ThisLValue = EmitLValueForLambdaField(LambdaThisCaptureField); |
Eli Friedman | cec5ebd | 2012-02-11 02:57:39 +0000 | [diff] [blame] | 591 | CXXThisValue = EmitLoadOfLValue(ThisLValue).getScalarVal(); |
| 592 | } |
| 593 | } else { |
| 594 | // Not in a lambda; just use 'this' from the method. |
| 595 | // FIXME: Should we generate a new load for each use of 'this'? The |
| 596 | // fast register allocator would be happier... |
| 597 | CXXThisValue = CXXABIThisValue; |
| 598 | } |
| 599 | } |
John McCall | 2504941 | 2010-02-16 22:04:33 +0000 | [diff] [blame] | 600 | |
Anders Carlsson | 751358f | 2008-12-20 21:28:43 +0000 | [diff] [blame] | 601 | // If any of the arguments have a variably modified type, make sure to |
| 602 | // emit the type size. |
| 603 | for (FunctionArgList::const_iterator i = Args.begin(), e = Args.end(); |
| 604 | i != e; ++i) { |
Eli Friedman | f5bf912 | 2012-11-14 22:09:59 +0000 | [diff] [blame] | 605 | const VarDecl *VD = *i; |
| 606 | |
| 607 | // Dig out the type as written from ParmVarDecls; it's unclear whether |
| 608 | // the standard (C99 6.9.1p10) requires this, but we're following the |
| 609 | // precedent set by gcc. |
| 610 | QualType Ty; |
| 611 | if (const ParmVarDecl *PVD = dyn_cast<ParmVarDecl>(VD)) |
| 612 | Ty = PVD->getOriginalType(); |
| 613 | else |
| 614 | Ty = VD->getType(); |
Anders Carlsson | 751358f | 2008-12-20 21:28:43 +0000 | [diff] [blame] | 615 | |
| 616 | if (Ty->isVariablyModifiedType()) |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 617 | EmitVariablyModifiedType(Ty); |
Anders Carlsson | 751358f | 2008-12-20 21:28:43 +0000 | [diff] [blame] | 618 | } |
Eric Christopher | 73fb350 | 2011-10-13 21:45:18 +0000 | [diff] [blame] | 619 | // Emit a location at the end of the prologue. |
| 620 | if (CGDebugInfo *DI = getDebugInfo()) |
| 621 | DI->EmitLocation(Builder, StartLoc); |
Daniel Dunbar | 7c08651 | 2008-09-09 23:14:03 +0000 | [diff] [blame] | 622 | } |
Eli Friedman | eb4b705 | 2008-08-25 21:31:01 +0000 | [diff] [blame] | 623 | |
John McCall | 9fc6a77 | 2010-02-19 09:25:03 +0000 | [diff] [blame] | 624 | void CodeGenFunction::EmitFunctionBody(FunctionArgList &Args) { |
| 625 | const FunctionDecl *FD = cast<FunctionDecl>(CurGD.getDecl()); |
Douglas Gregor | 06a9f36 | 2010-05-01 20:49:11 +0000 | [diff] [blame] | 626 | assert(FD->getBody()); |
David Blaikie | a650485 | 2013-01-26 22:16:26 +0000 | [diff] [blame] | 627 | if (const CompoundStmt *S = dyn_cast<CompoundStmt>(FD->getBody())) |
| 628 | EmitCompoundStmtWithoutScope(*S); |
| 629 | else |
| 630 | EmitStmt(FD->getBody()); |
John McCall | a355e07 | 2010-02-18 03:17:58 +0000 | [diff] [blame] | 631 | } |
| 632 | |
John McCall | 39dad53 | 2010-08-03 22:46:07 +0000 | [diff] [blame] | 633 | /// Tries to mark the given function nounwind based on the |
| 634 | /// non-existence of any throwing calls within it. We believe this is |
| 635 | /// lightweight enough to do at -O0. |
| 636 | static void TryMarkNoThrow(llvm::Function *F) { |
John McCall | b3a29f1 | 2010-08-11 22:38:33 +0000 | [diff] [blame] | 637 | // LLVM treats 'nounwind' on a function as part of the type, so we |
| 638 | // can't do this on functions that can be overwritten. |
| 639 | if (F->mayBeOverridden()) return; |
| 640 | |
John McCall | 39dad53 | 2010-08-03 22:46:07 +0000 | [diff] [blame] | 641 | for (llvm::Function::iterator FI = F->begin(), FE = F->end(); FI != FE; ++FI) |
| 642 | for (llvm::BasicBlock::iterator |
| 643 | BI = FI->begin(), BE = FI->end(); BI != BE; ++BI) |
Bill Wendling | 285cfd8 | 2011-09-19 20:31:14 +0000 | [diff] [blame] | 644 | if (llvm::CallInst *Call = dyn_cast<llvm::CallInst>(&*BI)) { |
John McCall | 39dad53 | 2010-08-03 22:46:07 +0000 | [diff] [blame] | 645 | if (!Call->doesNotThrow()) |
| 646 | return; |
Bill Wendling | 285cfd8 | 2011-09-19 20:31:14 +0000 | [diff] [blame] | 647 | } else if (isa<llvm::ResumeInst>(&*BI)) { |
| 648 | return; |
| 649 | } |
Bill Wendling | fac6310 | 2012-10-10 03:13:20 +0000 | [diff] [blame] | 650 | F->setDoesNotThrow(); |
John McCall | 39dad53 | 2010-08-03 22:46:07 +0000 | [diff] [blame] | 651 | } |
| 652 | |
John McCall | d26bc76 | 2011-03-09 04:27:21 +0000 | [diff] [blame] | 653 | void CodeGenFunction::GenerateCode(GlobalDecl GD, llvm::Function *Fn, |
| 654 | const CGFunctionInfo &FnInfo) { |
Anders Carlsson | 0ff8baf | 2009-09-11 00:07:24 +0000 | [diff] [blame] | 655 | const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 656 | |
Anders Carlsson | e896d98 | 2009-02-13 08:11:52 +0000 | [diff] [blame] | 657 | // Check if we should generate debug info for this function. |
Alexey Samsonov | a240df2 | 2012-10-16 07:22:28 +0000 | [diff] [blame] | 658 | if (!FD->hasAttr<NoDebugAttr>()) |
| 659 | maybeInitializeDebugInfo(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 660 | |
Daniel Dunbar | 7c08651 | 2008-09-09 23:14:03 +0000 | [diff] [blame] | 661 | FunctionArgList Args; |
John McCall | 4c40d98 | 2010-08-31 07:33:07 +0000 | [diff] [blame] | 662 | QualType ResTy = FD->getResultType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 663 | |
Mike Stump | 6a1e0eb | 2009-12-04 23:26:17 +0000 | [diff] [blame] | 664 | CurGD = GD; |
Stephen Lin | 3258abc | 2013-06-19 23:23:19 +0000 | [diff] [blame] | 665 | if (isa<CXXMethodDecl>(FD) && cast<CXXMethodDecl>(FD)->isInstance()) |
John McCall | 4c40d98 | 2010-08-31 07:33:07 +0000 | [diff] [blame] | 666 | CGM.getCXXABI().BuildInstanceFunctionParams(*this, ResTy, Args); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 667 | |
Chad Rosier | 6e94f6c | 2012-02-18 00:37:07 +0000 | [diff] [blame] | 668 | for (unsigned i = 0, e = FD->getNumParams(); i != e; ++i) |
| 669 | Args.push_back(FD->getParamDecl(i)); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 670 | |
John McCall | a355e07 | 2010-02-18 03:17:58 +0000 | [diff] [blame] | 671 | SourceRange BodyRange; |
| 672 | if (Stmt *Body = FD->getBody()) BodyRange = Body->getSourceRange(); |
Adrian Prantl | 1c3db76 | 2013-05-16 00:41:26 +0000 | [diff] [blame] | 673 | CurEHLocation = BodyRange.getEnd(); |
Anders Carlsson | 4365bba | 2009-11-06 02:55:43 +0000 | [diff] [blame] | 674 | |
Stephen Lin | 3258abc | 2013-06-19 23:23:19 +0000 | [diff] [blame] | 675 | // CalleeWithThisReturn keeps track of the last callee inside this function |
| 676 | // that returns 'this'. Before starting the function, we set it to null. |
| 677 | CalleeWithThisReturn = 0; |
| 678 | |
John McCall | a355e07 | 2010-02-18 03:17:58 +0000 | [diff] [blame] | 679 | // Emit the standard function prologue. |
John McCall | d26bc76 | 2011-03-09 04:27:21 +0000 | [diff] [blame] | 680 | StartFunction(GD, ResTy, Fn, FnInfo, Args, BodyRange.getBegin()); |
Anders Carlsson | 4365bba | 2009-11-06 02:55:43 +0000 | [diff] [blame] | 681 | |
John McCall | a355e07 | 2010-02-18 03:17:58 +0000 | [diff] [blame] | 682 | // Generate the body of the function. |
John McCall | 9fc6a77 | 2010-02-19 09:25:03 +0000 | [diff] [blame] | 683 | if (isa<CXXDestructorDecl>(FD)) |
| 684 | EmitDestructorBody(Args); |
| 685 | else if (isa<CXXConstructorDecl>(FD)) |
| 686 | EmitConstructorBody(Args); |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 687 | else if (getLangOpts().CUDA && |
Peter Collingbourne | a4ae229 | 2011-10-06 18:51:56 +0000 | [diff] [blame] | 688 | !CGM.getCodeGenOpts().CUDAIsDevice && |
| 689 | FD->hasAttr<CUDAGlobalAttr>()) |
| 690 | CGM.getCUDARuntime().EmitDeviceStubBody(*this, Args); |
Eli Friedman | bd89f8c | 2012-02-16 01:37:33 +0000 | [diff] [blame] | 691 | else if (isa<CXXConversionDecl>(FD) && |
Douglas Gregor | 27dd7d9 | 2012-02-17 03:02:34 +0000 | [diff] [blame] | 692 | cast<CXXConversionDecl>(FD)->isLambdaToBlockPointerConversion()) { |
| 693 | // The lambda conversion to block pointer is special; the semantics can't be |
| 694 | // expressed in the AST, so IRGen needs to special-case it. |
| 695 | EmitLambdaToBlockPointerBody(Args); |
| 696 | } else if (isa<CXXMethodDecl>(FD) && |
| 697 | cast<CXXMethodDecl>(FD)->isLambdaStaticInvoker()) { |
| 698 | // The lambda "__invoke" function is special, because it forwards or |
| 699 | // clones the body of the function call operator (but is actually static). |
| 700 | EmitLambdaStaticInvokeFunction(cast<CXXMethodDecl>(FD)); |
Lang Hames | 56c00c4 | 2013-02-17 07:22:09 +0000 | [diff] [blame] | 701 | } else if (FD->isDefaulted() && isa<CXXMethodDecl>(FD) && |
| 702 | cast<CXXMethodDecl>(FD)->isCopyAssignmentOperator()) { |
| 703 | // Implicit copy-assignment gets the same special treatment as implicit |
| 704 | // copy-constructors. |
| 705 | emitImplicitAssignmentOperatorBody(Args); |
Eli Friedman | bd89f8c | 2012-02-16 01:37:33 +0000 | [diff] [blame] | 706 | } |
John McCall | 9fc6a77 | 2010-02-19 09:25:03 +0000 | [diff] [blame] | 707 | else |
| 708 | EmitFunctionBody(Args); |
Anders Carlsson | 1851a12 | 2010-02-07 19:45:40 +0000 | [diff] [blame] | 709 | |
Richard Smith | 36ef0d5 | 2012-10-04 23:52:29 +0000 | [diff] [blame] | 710 | // C++11 [stmt.return]p2: |
| 711 | // Flowing off the end of a function [...] results in undefined behavior in |
| 712 | // a value-returning function. |
| 713 | // C11 6.9.1p12: |
| 714 | // If the '}' that terminates a function is reached, and the value of the |
| 715 | // function call is used by the caller, the behavior is undefined. |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 716 | if (getLangOpts().CPlusPlus && !FD->hasImplicitReturnZero() && |
Richard Smith | 36ef0d5 | 2012-10-04 23:52:29 +0000 | [diff] [blame] | 717 | !FD->getResultType()->isVoidType() && Builder.GetInsertBlock()) { |
Will Dietz | 4f45bc0 | 2013-01-18 11:30:38 +0000 | [diff] [blame] | 718 | if (SanOpts->Return) |
Richard Smith | 4def70d | 2012-10-09 19:52:38 +0000 | [diff] [blame] | 719 | EmitCheck(Builder.getFalse(), "missing_return", |
| 720 | EmitCheckSourceLocation(FD->getLocation()), |
Dmitri Gribenko | cfa88f8 | 2013-01-12 19:30:44 +0000 | [diff] [blame] | 721 | ArrayRef<llvm::Value *>(), CRK_Unrecoverable); |
Richard Smith | 802cd5b | 2012-10-15 00:23:07 +0000 | [diff] [blame] | 722 | else if (CGM.getCodeGenOpts().OptimizationLevel == 0) |
| 723 | Builder.CreateCall(CGM.getIntrinsic(llvm::Intrinsic::trap)); |
Richard Smith | 36ef0d5 | 2012-10-04 23:52:29 +0000 | [diff] [blame] | 724 | Builder.CreateUnreachable(); |
| 725 | Builder.ClearInsertionPoint(); |
| 726 | } |
| 727 | |
John McCall | a355e07 | 2010-02-18 03:17:58 +0000 | [diff] [blame] | 728 | // Emit the standard function epilogue. |
| 729 | FinishFunction(BodyRange.getEnd()); |
Stephen Lin | 3258abc | 2013-06-19 23:23:19 +0000 | [diff] [blame] | 730 | // CalleeWithThisReturn keeps track of the last callee inside this function |
| 731 | // that returns 'this'. After finishing the function, we set it to null. |
| 732 | CalleeWithThisReturn = 0; |
John McCall | 39dad53 | 2010-08-03 22:46:07 +0000 | [diff] [blame] | 733 | |
| 734 | // If we haven't marked the function nothrow through other means, do |
| 735 | // a quick pass now to see if we can. |
| 736 | if (!CurFn->doesNotThrow()) |
| 737 | TryMarkNoThrow(CurFn); |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 738 | } |
| 739 | |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 740 | /// ContainsLabel - Return true if the statement contains a label in it. If |
| 741 | /// this statement is not executed normally, it not containing a label means |
| 742 | /// that we can just remove the code. |
| 743 | bool CodeGenFunction::ContainsLabel(const Stmt *S, bool IgnoreCaseStmts) { |
| 744 | // Null statement, not a label! |
| 745 | if (S == 0) return false; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 746 | |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 747 | // If this is a label, we have to emit the code, consider something like: |
| 748 | // if (0) { ... foo: bar(); } goto foo; |
Chris Lattner | ef425a6 | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 749 | // |
| 750 | // TODO: If anyone cared, we could track __label__'s, since we know that you |
| 751 | // can't jump to one from outside their declared region. |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 752 | if (isa<LabelStmt>(S)) |
| 753 | return true; |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 754 | |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 755 | // If this is a case/default statement, and we haven't seen a switch, we have |
| 756 | // to emit the code. |
| 757 | if (isa<SwitchCase>(S) && !IgnoreCaseStmts) |
| 758 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 759 | |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 760 | // If this is a switch statement, we want to ignore cases below it. |
| 761 | if (isa<SwitchStmt>(S)) |
| 762 | IgnoreCaseStmts = true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 763 | |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 764 | // Scan subexpressions for verboten labels. |
John McCall | 7502c1d | 2011-02-13 04:07:26 +0000 | [diff] [blame] | 765 | for (Stmt::const_child_range I = S->children(); I; ++I) |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 766 | if (ContainsLabel(*I, IgnoreCaseStmts)) |
| 767 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 768 | |
Chris Lattner | 0946ccd | 2008-11-11 07:41:27 +0000 | [diff] [blame] | 769 | return false; |
| 770 | } |
| 771 | |
Chris Lattner | ef425a6 | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 772 | /// containsBreak - Return true if the statement contains a break out of it. |
| 773 | /// If the statement (recursively) contains a switch or loop with a break |
| 774 | /// inside of it, this is fine. |
| 775 | bool CodeGenFunction::containsBreak(const Stmt *S) { |
| 776 | // Null statement, not a label! |
| 777 | if (S == 0) return false; |
| 778 | |
| 779 | // If this is a switch or loop that defines its own break scope, then we can |
| 780 | // include it and anything inside of it. |
| 781 | if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) || isa<DoStmt>(S) || |
| 782 | isa<ForStmt>(S)) |
Chris Lattner | 2bef7f5 | 2011-02-28 00:42:31 +0000 | [diff] [blame] | 783 | return false; |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 784 | |
Chris Lattner | 2bef7f5 | 2011-02-28 00:42:31 +0000 | [diff] [blame] | 785 | if (isa<BreakStmt>(S)) |
Chris Lattner | ef425a6 | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 786 | return true; |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 787 | |
Chris Lattner | ef425a6 | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 788 | // Scan subexpressions for verboten breaks. |
| 789 | for (Stmt::const_child_range I = S->children(); I; ++I) |
| 790 | if (containsBreak(*I)) |
| 791 | return true; |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 792 | |
Chris Lattner | ef425a6 | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 793 | return false; |
| 794 | } |
| 795 | |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 796 | |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 797 | /// ConstantFoldsToSimpleInteger - If the specified expression does not fold |
| 798 | /// to a constant, or if it does but contains a label, return false. If it |
| 799 | /// constant folds return true and set the boolean result in Result. |
| 800 | bool CodeGenFunction::ConstantFoldsToSimpleInteger(const Expr *Cond, |
| 801 | bool &ResultBool) { |
Richard Trieu | e1ecdc1 | 2012-07-23 20:21:35 +0000 | [diff] [blame] | 802 | llvm::APSInt ResultInt; |
Chris Lattner | ef425a6 | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 803 | if (!ConstantFoldsToSimpleInteger(Cond, ResultInt)) |
| 804 | return false; |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 805 | |
Chris Lattner | ef425a6 | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 806 | ResultBool = ResultInt.getBoolValue(); |
| 807 | return true; |
| 808 | } |
| 809 | |
| 810 | /// ConstantFoldsToSimpleInteger - If the specified expression does not fold |
| 811 | /// to a constant, or if it does but contains a label, return false. If it |
| 812 | /// constant folds return true and set the folded value. |
| 813 | bool CodeGenFunction:: |
Richard Trieu | e1ecdc1 | 2012-07-23 20:21:35 +0000 | [diff] [blame] | 814 | ConstantFoldsToSimpleInteger(const Expr *Cond, llvm::APSInt &ResultInt) { |
Daniel Dunbar | 36bc14c | 2008-11-12 22:37:10 +0000 | [diff] [blame] | 815 | // FIXME: Rename and handle conversion of other evaluatable things |
| 816 | // to bool. |
Richard Smith | 80d4b55 | 2011-12-28 19:48:30 +0000 | [diff] [blame] | 817 | llvm::APSInt Int; |
| 818 | if (!Cond->EvaluateAsInt(Int, getContext())) |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 819 | return false; // Not foldable, not integer or not fully evaluatable. |
Richard Smith | 80d4b55 | 2011-12-28 19:48:30 +0000 | [diff] [blame] | 820 | |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 821 | if (CodeGenFunction::ContainsLabel(Cond)) |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 822 | return false; // Contains a label. |
Richard Smith | 80d4b55 | 2011-12-28 19:48:30 +0000 | [diff] [blame] | 823 | |
| 824 | ResultInt = Int; |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 825 | return true; |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 826 | } |
| 827 | |
| 828 | |
Chris Lattner | ef425a6 | 2011-02-28 00:18:40 +0000 | [diff] [blame] | 829 | |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 830 | /// EmitBranchOnBoolExpr - Emit a branch on a boolean condition (e.g. for an if |
| 831 | /// statement) to the specified blocks. Based on the condition, this might try |
| 832 | /// to simplify the codegen of the conditional based on the branch. |
| 833 | /// |
| 834 | void CodeGenFunction::EmitBranchOnBoolExpr(const Expr *Cond, |
| 835 | llvm::BasicBlock *TrueBlock, |
| 836 | llvm::BasicBlock *FalseBlock) { |
Peter Collingbourne | f111d93 | 2011-04-15 00:35:48 +0000 | [diff] [blame] | 837 | Cond = Cond->IgnoreParens(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 838 | |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 839 | if (const BinaryOperator *CondBOp = dyn_cast<BinaryOperator>(Cond)) { |
| 840 | // Handle X && Y in a condition. |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 841 | if (CondBOp->getOpcode() == BO_LAnd) { |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 842 | // If we have "1 && X", simplify the code. "0 && X" would have constant |
| 843 | // folded if the case was simple enough. |
Bill Wendling | e3eb83b | 2011-03-04 21:46:03 +0000 | [diff] [blame] | 844 | bool ConstantBool = false; |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 845 | if (ConstantFoldsToSimpleInteger(CondBOp->getLHS(), ConstantBool) && |
| 846 | ConstantBool) { |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 847 | // br(1 && X) -> br(X). |
| 848 | return EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock); |
| 849 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 850 | |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 851 | // If we have "X && 1", simplify the code to use an uncond branch. |
| 852 | // "X && 0" would have been constant folded to 0. |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 853 | if (ConstantFoldsToSimpleInteger(CondBOp->getRHS(), ConstantBool) && |
| 854 | ConstantBool) { |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 855 | // br(X && 1) -> br(X). |
| 856 | return EmitBranchOnBoolExpr(CondBOp->getLHS(), TrueBlock, FalseBlock); |
| 857 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 858 | |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 859 | // Emit the LHS as a conditional. If the LHS conditional is false, we |
| 860 | // want to jump to the FalseBlock. |
Daniel Dunbar | 9615ecb | 2008-11-13 01:38:36 +0000 | [diff] [blame] | 861 | llvm::BasicBlock *LHSTrue = createBasicBlock("land.lhs.true"); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 862 | |
| 863 | ConditionalEvaluation eval(*this); |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 864 | EmitBranchOnBoolExpr(CondBOp->getLHS(), LHSTrue, FalseBlock); |
| 865 | EmitBlock(LHSTrue); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 866 | |
Anders Carlsson | 08e9e45 | 2010-01-24 00:20:05 +0000 | [diff] [blame] | 867 | // Any temporaries created here are conditional. |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 868 | eval.begin(*this); |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 869 | EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 870 | eval.end(*this); |
Anders Carlsson | 08e9e45 | 2010-01-24 00:20:05 +0000 | [diff] [blame] | 871 | |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 872 | return; |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 873 | } |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 874 | |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 875 | if (CondBOp->getOpcode() == BO_LOr) { |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 876 | // If we have "0 || X", simplify the code. "1 || X" would have constant |
| 877 | // folded if the case was simple enough. |
Bill Wendling | e3eb83b | 2011-03-04 21:46:03 +0000 | [diff] [blame] | 878 | bool ConstantBool = false; |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 879 | if (ConstantFoldsToSimpleInteger(CondBOp->getLHS(), ConstantBool) && |
| 880 | !ConstantBool) { |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 881 | // br(0 || X) -> br(X). |
| 882 | return EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock); |
| 883 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 884 | |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 885 | // If we have "X || 0", simplify the code to use an uncond branch. |
| 886 | // "X || 1" would have been constant folded to 1. |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 887 | if (ConstantFoldsToSimpleInteger(CondBOp->getRHS(), ConstantBool) && |
| 888 | !ConstantBool) { |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 889 | // br(X || 0) -> br(X). |
| 890 | return EmitBranchOnBoolExpr(CondBOp->getLHS(), TrueBlock, FalseBlock); |
| 891 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 892 | |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 893 | // Emit the LHS as a conditional. If the LHS conditional is true, we |
| 894 | // want to jump to the TrueBlock. |
Daniel Dunbar | 9615ecb | 2008-11-13 01:38:36 +0000 | [diff] [blame] | 895 | llvm::BasicBlock *LHSFalse = createBasicBlock("lor.lhs.false"); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 896 | |
| 897 | ConditionalEvaluation eval(*this); |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 898 | EmitBranchOnBoolExpr(CondBOp->getLHS(), TrueBlock, LHSFalse); |
| 899 | EmitBlock(LHSFalse); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 900 | |
Anders Carlsson | 08e9e45 | 2010-01-24 00:20:05 +0000 | [diff] [blame] | 901 | // Any temporaries created here are conditional. |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 902 | eval.begin(*this); |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 903 | EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 904 | eval.end(*this); |
Anders Carlsson | 08e9e45 | 2010-01-24 00:20:05 +0000 | [diff] [blame] | 905 | |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 906 | return; |
| 907 | } |
Chris Lattner | 552f4c4 | 2008-11-12 08:13:36 +0000 | [diff] [blame] | 908 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 909 | |
Chris Lattner | 552f4c4 | 2008-11-12 08:13:36 +0000 | [diff] [blame] | 910 | if (const UnaryOperator *CondUOp = dyn_cast<UnaryOperator>(Cond)) { |
| 911 | // br(!x, t, f) -> br(x, f, t) |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 912 | if (CondUOp->getOpcode() == UO_LNot) |
Chris Lattner | 552f4c4 | 2008-11-12 08:13:36 +0000 | [diff] [blame] | 913 | return EmitBranchOnBoolExpr(CondUOp->getSubExpr(), FalseBlock, TrueBlock); |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 914 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 915 | |
Daniel Dunbar | 09b1489 | 2008-11-12 10:30:32 +0000 | [diff] [blame] | 916 | if (const ConditionalOperator *CondOp = dyn_cast<ConditionalOperator>(Cond)) { |
Eli Friedman | df33a35 | 2012-02-14 03:54:45 +0000 | [diff] [blame] | 917 | // br(c ? x : y, t, f) -> br(c, br(x, t, f), br(y, t, f)) |
| 918 | llvm::BasicBlock *LHSBlock = createBasicBlock("cond.true"); |
| 919 | llvm::BasicBlock *RHSBlock = createBasicBlock("cond.false"); |
Daniel Dunbar | 09b1489 | 2008-11-12 10:30:32 +0000 | [diff] [blame] | 920 | |
Eli Friedman | df33a35 | 2012-02-14 03:54:45 +0000 | [diff] [blame] | 921 | ConditionalEvaluation cond(*this); |
| 922 | EmitBranchOnBoolExpr(CondOp->getCond(), LHSBlock, RHSBlock); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 923 | |
Eli Friedman | df33a35 | 2012-02-14 03:54:45 +0000 | [diff] [blame] | 924 | cond.begin(*this); |
| 925 | EmitBlock(LHSBlock); |
| 926 | EmitBranchOnBoolExpr(CondOp->getLHS(), TrueBlock, FalseBlock); |
| 927 | cond.end(*this); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 928 | |
Eli Friedman | df33a35 | 2012-02-14 03:54:45 +0000 | [diff] [blame] | 929 | cond.begin(*this); |
| 930 | EmitBlock(RHSBlock); |
| 931 | EmitBranchOnBoolExpr(CondOp->getRHS(), TrueBlock, FalseBlock); |
| 932 | cond.end(*this); |
John McCall | 150b462 | 2011-01-26 04:00:11 +0000 | [diff] [blame] | 933 | |
Eli Friedman | df33a35 | 2012-02-14 03:54:45 +0000 | [diff] [blame] | 934 | return; |
Daniel Dunbar | 09b1489 | 2008-11-12 10:30:32 +0000 | [diff] [blame] | 935 | } |
| 936 | |
Richard Smith | 4c71b8c | 2013-05-07 21:53:22 +0000 | [diff] [blame] | 937 | if (const CXXThrowExpr *Throw = dyn_cast<CXXThrowExpr>(Cond)) { |
| 938 | // Conditional operator handling can give us a throw expression as a |
| 939 | // condition for a case like: |
| 940 | // br(c ? throw x : y, t, f) -> br(c, br(throw x, t, f), br(y, t, f) |
| 941 | // Fold this to: |
| 942 | // br(c, throw x, br(y, t, f)) |
| 943 | EmitCXXThrowExpr(Throw, /*KeepInsertionPoint*/false); |
| 944 | return; |
| 945 | } |
| 946 | |
Chris Lattner | 31a0984 | 2008-11-12 08:04:58 +0000 | [diff] [blame] | 947 | // Emit the code with the fully general case. |
| 948 | llvm::Value *CondV = EvaluateExprAsBool(Cond); |
| 949 | Builder.CreateCondBr(CondV, TrueBlock, FalseBlock); |
| 950 | } |
| 951 | |
Daniel Dunbar | 488e993 | 2008-08-16 00:56:44 +0000 | [diff] [blame] | 952 | /// ErrorUnsupported - Print out an error that codegen doesn't support the |
Chris Lattner | dc5e826 | 2007-12-02 01:43:38 +0000 | [diff] [blame] | 953 | /// specified stmt yet. |
Daniel Dunbar | 90df4b6 | 2008-09-04 03:43:08 +0000 | [diff] [blame] | 954 | void CodeGenFunction::ErrorUnsupported(const Stmt *S, const char *Type, |
| 955 | bool OmitOnError) { |
| 956 | CGM.ErrorUnsupported(S, Type, OmitOnError); |
Chris Lattner | dc5e826 | 2007-12-02 01:43:38 +0000 | [diff] [blame] | 957 | } |
| 958 | |
John McCall | 7143325 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 959 | /// emitNonZeroVLAInit - Emit the "zero" initialization of a |
| 960 | /// variable-length array whose elements have a non-zero bit-pattern. |
| 961 | /// |
James Dennett | 2ee5ba3 | 2012-06-15 22:10:14 +0000 | [diff] [blame] | 962 | /// \param baseType the inner-most element type of the array |
John McCall | 7143325 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 963 | /// \param src - a char* pointing to the bit-pattern for a single |
| 964 | /// base element of the array |
| 965 | /// \param sizeInChars - the total size of the VLA, in chars |
John McCall | 7143325 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 966 | static void emitNonZeroVLAInit(CodeGenFunction &CGF, QualType baseType, |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 967 | llvm::Value *dest, llvm::Value *src, |
John McCall | 7143325 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 968 | llvm::Value *sizeInChars) { |
| 969 | std::pair<CharUnits,CharUnits> baseSizeAndAlign |
| 970 | = CGF.getContext().getTypeInfoInChars(baseType); |
| 971 | |
| 972 | CGBuilderTy &Builder = CGF.Builder; |
| 973 | |
| 974 | llvm::Value *baseSizeInChars |
| 975 | = llvm::ConstantInt::get(CGF.IntPtrTy, baseSizeAndAlign.first.getQuantity()); |
| 976 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 977 | llvm::Type *i8p = Builder.getInt8PtrTy(); |
John McCall | 7143325 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 978 | |
| 979 | llvm::Value *begin = Builder.CreateBitCast(dest, i8p, "vla.begin"); |
| 980 | llvm::Value *end = Builder.CreateInBoundsGEP(dest, sizeInChars, "vla.end"); |
| 981 | |
| 982 | llvm::BasicBlock *originBB = CGF.Builder.GetInsertBlock(); |
| 983 | llvm::BasicBlock *loopBB = CGF.createBasicBlock("vla-init.loop"); |
| 984 | llvm::BasicBlock *contBB = CGF.createBasicBlock("vla-init.cont"); |
| 985 | |
| 986 | // Make a loop over the VLA. C99 guarantees that the VLA element |
| 987 | // count must be nonzero. |
| 988 | CGF.EmitBlock(loopBB); |
| 989 | |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 990 | llvm::PHINode *cur = Builder.CreatePHI(i8p, 2, "vla.cur"); |
John McCall | 7143325 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 991 | cur->addIncoming(begin, originBB); |
| 992 | |
| 993 | // memcpy the individual element bit-pattern. |
| 994 | Builder.CreateMemCpy(cur, src, baseSizeInChars, |
| 995 | baseSizeAndAlign.second.getQuantity(), |
| 996 | /*volatile*/ false); |
| 997 | |
| 998 | // Go to the next element. |
| 999 | llvm::Value *next = Builder.CreateConstInBoundsGEP1_32(cur, 1, "vla.next"); |
| 1000 | |
| 1001 | // Leave if that's the end of the VLA. |
| 1002 | llvm::Value *done = Builder.CreateICmpEQ(next, end, "vla-init.isdone"); |
| 1003 | Builder.CreateCondBr(done, contBB, loopBB); |
| 1004 | cur->addIncoming(next, loopBB); |
| 1005 | |
| 1006 | CGF.EmitBlock(contBB); |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1007 | } |
John McCall | 7143325 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1008 | |
Anders Carlsson | 1884eb0 | 2010-05-22 17:35:42 +0000 | [diff] [blame] | 1009 | void |
| 1010 | CodeGenFunction::EmitNullInitialization(llvm::Value *DestPtr, QualType Ty) { |
Anders Carlsson | 0d7c583 | 2010-05-03 01:20:20 +0000 | [diff] [blame] | 1011 | // Ignore empty classes in C++. |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 1012 | if (getLangOpts().CPlusPlus) { |
Anders Carlsson | 0d7c583 | 2010-05-03 01:20:20 +0000 | [diff] [blame] | 1013 | if (const RecordType *RT = Ty->getAs<RecordType>()) { |
| 1014 | if (cast<CXXRecordDecl>(RT->getDecl())->isEmpty()) |
| 1015 | return; |
| 1016 | } |
| 1017 | } |
John McCall | 9021718 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1018 | |
| 1019 | // Cast the dest ptr to the appropriate i8 pointer type. |
| 1020 | unsigned DestAS = |
| 1021 | cast<llvm::PointerType>(DestPtr->getType())->getAddressSpace(); |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1022 | llvm::Type *BP = Builder.getInt8PtrTy(DestAS); |
Anders Carlsson | 3d8400d | 2008-08-30 19:51:14 +0000 | [diff] [blame] | 1023 | if (DestPtr->getType() != BP) |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1024 | DestPtr = Builder.CreateBitCast(DestPtr, BP); |
Anders Carlsson | 3d8400d | 2008-08-30 19:51:14 +0000 | [diff] [blame] | 1025 | |
| 1026 | // Get size and alignment info for this aggregate. |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1027 | std::pair<CharUnits, CharUnits> TypeInfo = |
Ken Dyck | 79be76c | 2011-04-22 17:51:05 +0000 | [diff] [blame] | 1028 | getContext().getTypeInfoInChars(Ty); |
| 1029 | CharUnits Size = TypeInfo.first; |
| 1030 | CharUnits Align = TypeInfo.second; |
Anders Carlsson | 3d8400d | 2008-08-30 19:51:14 +0000 | [diff] [blame] | 1031 | |
John McCall | 5576d9b | 2011-01-14 10:37:58 +0000 | [diff] [blame] | 1032 | llvm::Value *SizeVal; |
John McCall | 7143325 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1033 | const VariableArrayType *vla; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1034 | |
John McCall | 5576d9b | 2011-01-14 10:37:58 +0000 | [diff] [blame] | 1035 | // Don't bother emitting a zero-byte memset. |
Ken Dyck | 79be76c | 2011-04-22 17:51:05 +0000 | [diff] [blame] | 1036 | if (Size.isZero()) { |
John McCall | 5576d9b | 2011-01-14 10:37:58 +0000 | [diff] [blame] | 1037 | // But note that getTypeInfo returns 0 for a VLA. |
| 1038 | if (const VariableArrayType *vlaType = |
| 1039 | dyn_cast_or_null<VariableArrayType>( |
| 1040 | getContext().getAsArrayType(Ty))) { |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1041 | QualType eltType; |
| 1042 | llvm::Value *numElts; |
| 1043 | llvm::tie(numElts, eltType) = getVLASize(vlaType); |
| 1044 | |
| 1045 | SizeVal = numElts; |
| 1046 | CharUnits eltSize = getContext().getTypeSizeInChars(eltType); |
| 1047 | if (!eltSize.isOne()) |
| 1048 | SizeVal = Builder.CreateNUWMul(SizeVal, CGM.getSize(eltSize)); |
John McCall | 7143325 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1049 | vla = vlaType; |
John McCall | 5576d9b | 2011-01-14 10:37:58 +0000 | [diff] [blame] | 1050 | } else { |
| 1051 | return; |
| 1052 | } |
| 1053 | } else { |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1054 | SizeVal = CGM.getSize(Size); |
John McCall | 7143325 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1055 | vla = 0; |
John McCall | 5576d9b | 2011-01-14 10:37:58 +0000 | [diff] [blame] | 1056 | } |
John McCall | 9021718 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1057 | |
| 1058 | // If the type contains a pointer to data member we can't memset it to zero. |
| 1059 | // Instead, create a null constant and copy it to the destination. |
John McCall | 7143325 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1060 | // TODO: there are other patterns besides zero that we can usefully memset, |
| 1061 | // like -1, which happens to be the pattern used by member-pointers. |
John McCall | f16aa10 | 2010-08-22 21:01:12 +0000 | [diff] [blame] | 1062 | if (!CGM.getTypes().isZeroInitializable(Ty)) { |
John McCall | 7143325 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1063 | // For a VLA, emit a single element, then splat that over the VLA. |
| 1064 | if (vla) Ty = getContext().getBaseElementType(vla); |
John McCall | 5576d9b | 2011-01-14 10:37:58 +0000 | [diff] [blame] | 1065 | |
John McCall | 9021718 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1066 | llvm::Constant *NullConstant = CGM.EmitNullConstant(Ty); |
| 1067 | |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1068 | llvm::GlobalVariable *NullVariable = |
John McCall | 9021718 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1069 | new llvm::GlobalVariable(CGM.getModule(), NullConstant->getType(), |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1070 | /*isConstant=*/true, |
John McCall | 9021718 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1071 | llvm::GlobalVariable::PrivateLinkage, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1072 | NullConstant, Twine()); |
John McCall | 9021718 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1073 | llvm::Value *SrcPtr = |
| 1074 | Builder.CreateBitCast(NullVariable, Builder.getInt8PtrTy()); |
| 1075 | |
John McCall | 7143325 | 2011-02-01 21:35:06 +0000 | [diff] [blame] | 1076 | if (vla) return emitNonZeroVLAInit(*this, Ty, DestPtr, SrcPtr, SizeVal); |
| 1077 | |
John McCall | 9021718 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1078 | // Get and call the appropriate llvm.memcpy overload. |
Ken Dyck | 79be76c | 2011-04-22 17:51:05 +0000 | [diff] [blame] | 1079 | Builder.CreateMemCpy(DestPtr, SrcPtr, SizeVal, Align.getQuantity(), false); |
John McCall | 9021718 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1080 | return; |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1081 | } |
| 1082 | |
John McCall | 9021718 | 2010-08-07 08:21:30 +0000 | [diff] [blame] | 1083 | // Otherwise, just memset the whole thing to zero. This is legal |
| 1084 | // because in LLVM, all default initializers (other than the ones we just |
| 1085 | // handled above) are guaranteed to have a bit pattern of all zeros. |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1086 | Builder.CreateMemSet(DestPtr, Builder.getInt8(0), SizeVal, |
Ken Dyck | 79be76c | 2011-04-22 17:51:05 +0000 | [diff] [blame] | 1087 | Align.getQuantity(), false); |
Anders Carlsson | 3d8400d | 2008-08-30 19:51:14 +0000 | [diff] [blame] | 1088 | } |
| 1089 | |
Chris Lattner | ad8dcf4 | 2011-02-17 07:39:24 +0000 | [diff] [blame] | 1090 | llvm::BlockAddress *CodeGenFunction::GetAddrOfLabel(const LabelDecl *L) { |
Chris Lattner | d9becd1 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 1091 | // Make sure that there is a block for the indirect goto. |
| 1092 | if (IndirectBranch == 0) |
| 1093 | GetIndirectGotoBlock(); |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1094 | |
John McCall | ff8e115 | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 1095 | llvm::BasicBlock *BB = getJumpDestForLabel(L).getBlock(); |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1096 | |
Chris Lattner | d9becd1 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 1097 | // Make sure the indirect branch includes all of the address-taken blocks. |
| 1098 | IndirectBranch->addDestination(BB); |
| 1099 | return llvm::BlockAddress::get(CurFn, BB); |
Chris Lattner | 3d00fdc | 2009-10-13 06:55:33 +0000 | [diff] [blame] | 1100 | } |
| 1101 | |
| 1102 | llvm::BasicBlock *CodeGenFunction::GetIndirectGotoBlock() { |
Chris Lattner | d9becd1 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 1103 | // If we already made the indirect branch for indirect goto, return its block. |
| 1104 | if (IndirectBranch) return IndirectBranch->getParent(); |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1105 | |
Chris Lattner | d9becd1 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 1106 | CGBuilderTy TmpBuilder(createBasicBlock("indirectgoto")); |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1107 | |
Chris Lattner | 3d00fdc | 2009-10-13 06:55:33 +0000 | [diff] [blame] | 1108 | // Create the PHI node that indirect gotos will add entries to. |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 1109 | llvm::Value *DestVal = TmpBuilder.CreatePHI(Int8PtrTy, 0, |
| 1110 | "indirect.goto.dest"); |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1111 | |
Chris Lattner | d9becd1 | 2009-10-28 23:59:40 +0000 | [diff] [blame] | 1112 | // Create the indirect branch instruction. |
| 1113 | IndirectBranch = TmpBuilder.CreateIndirectBr(DestVal); |
| 1114 | return IndirectBranch->getParent(); |
Daniel Dunbar | 0ffb125 | 2008-08-04 16:51:22 +0000 | [diff] [blame] | 1115 | } |
Anders Carlsson | ddf7cac | 2008-11-04 05:30:00 +0000 | [diff] [blame] | 1116 | |
John McCall | bdc4d80 | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1117 | /// Computes the length of an array in elements, as well as the base |
| 1118 | /// element type and a properly-typed first element pointer. |
| 1119 | llvm::Value *CodeGenFunction::emitArrayLength(const ArrayType *origArrayType, |
| 1120 | QualType &baseType, |
| 1121 | llvm::Value *&addr) { |
| 1122 | const ArrayType *arrayType = origArrayType; |
| 1123 | |
| 1124 | // If it's a VLA, we have to load the stored size. Note that |
| 1125 | // this is the size of the VLA in bytes, not its size in elements. |
| 1126 | llvm::Value *numVLAElements = 0; |
| 1127 | if (isa<VariableArrayType>(arrayType)) { |
| 1128 | numVLAElements = getVLASize(cast<VariableArrayType>(arrayType)).first; |
| 1129 | |
| 1130 | // Walk into all VLAs. This doesn't require changes to addr, |
| 1131 | // which has type T* where T is the first non-VLA element type. |
| 1132 | do { |
| 1133 | QualType elementType = arrayType->getElementType(); |
| 1134 | arrayType = getContext().getAsArrayType(elementType); |
| 1135 | |
| 1136 | // If we only have VLA components, 'addr' requires no adjustment. |
| 1137 | if (!arrayType) { |
| 1138 | baseType = elementType; |
| 1139 | return numVLAElements; |
| 1140 | } |
| 1141 | } while (isa<VariableArrayType>(arrayType)); |
| 1142 | |
| 1143 | // We get out here only if we find a constant array type |
| 1144 | // inside the VLA. |
| 1145 | } |
| 1146 | |
| 1147 | // We have some number of constant-length arrays, so addr should |
| 1148 | // have LLVM type [M x [N x [...]]]*. Build a GEP that walks |
| 1149 | // down to the first element of addr. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1150 | SmallVector<llvm::Value*, 8> gepIndices; |
John McCall | bdc4d80 | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1151 | |
| 1152 | // GEP down to the array type. |
| 1153 | llvm::ConstantInt *zero = Builder.getInt32(0); |
| 1154 | gepIndices.push_back(zero); |
| 1155 | |
John McCall | bdc4d80 | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1156 | uint64_t countFromCLAs = 1; |
Richard Smith | 1664d54 | 2012-04-22 05:51:36 +0000 | [diff] [blame] | 1157 | QualType eltType; |
John McCall | bdc4d80 | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1158 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1159 | llvm::ArrayType *llvmArrayType = |
Richard Smith | 1664d54 | 2012-04-22 05:51:36 +0000 | [diff] [blame] | 1160 | dyn_cast<llvm::ArrayType>( |
John McCall | bdc4d80 | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1161 | cast<llvm::PointerType>(addr->getType())->getElementType()); |
Richard Smith | 1664d54 | 2012-04-22 05:51:36 +0000 | [diff] [blame] | 1162 | while (llvmArrayType) { |
John McCall | bdc4d80 | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1163 | assert(isa<ConstantArrayType>(arrayType)); |
| 1164 | assert(cast<ConstantArrayType>(arrayType)->getSize().getZExtValue() |
| 1165 | == llvmArrayType->getNumElements()); |
| 1166 | |
| 1167 | gepIndices.push_back(zero); |
| 1168 | countFromCLAs *= llvmArrayType->getNumElements(); |
Richard Smith | 1664d54 | 2012-04-22 05:51:36 +0000 | [diff] [blame] | 1169 | eltType = arrayType->getElementType(); |
John McCall | bdc4d80 | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1170 | |
| 1171 | llvmArrayType = |
| 1172 | dyn_cast<llvm::ArrayType>(llvmArrayType->getElementType()); |
John McCall | bdc4d80 | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1173 | arrayType = getContext().getAsArrayType(arrayType->getElementType()); |
Richard Smith | 1664d54 | 2012-04-22 05:51:36 +0000 | [diff] [blame] | 1174 | assert((!llvmArrayType || arrayType) && |
| 1175 | "LLVM and Clang types are out-of-synch"); |
John McCall | bdc4d80 | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1176 | } |
| 1177 | |
Richard Smith | 1664d54 | 2012-04-22 05:51:36 +0000 | [diff] [blame] | 1178 | if (arrayType) { |
| 1179 | // From this point onwards, the Clang array type has been emitted |
| 1180 | // as some other type (probably a packed struct). Compute the array |
| 1181 | // size, and just emit the 'begin' expression as a bitcast. |
| 1182 | while (arrayType) { |
| 1183 | countFromCLAs *= |
| 1184 | cast<ConstantArrayType>(arrayType)->getSize().getZExtValue(); |
| 1185 | eltType = arrayType->getElementType(); |
| 1186 | arrayType = getContext().getAsArrayType(eltType); |
| 1187 | } |
John McCall | bdc4d80 | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1188 | |
Micah Villmow | 956a5a1 | 2012-10-25 15:39:14 +0000 | [diff] [blame] | 1189 | unsigned AddressSpace = addr->getType()->getPointerAddressSpace(); |
Richard Smith | 1664d54 | 2012-04-22 05:51:36 +0000 | [diff] [blame] | 1190 | llvm::Type *BaseType = ConvertType(eltType)->getPointerTo(AddressSpace); |
| 1191 | addr = Builder.CreateBitCast(addr, BaseType, "array.begin"); |
| 1192 | } else { |
| 1193 | // Create the actual GEP. |
| 1194 | addr = Builder.CreateInBoundsGEP(addr, gepIndices, "array.begin"); |
| 1195 | } |
| 1196 | |
| 1197 | baseType = eltType; |
John McCall | bdc4d80 | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 1198 | |
| 1199 | llvm::Value *numElements |
| 1200 | = llvm::ConstantInt::get(SizeTy, countFromCLAs); |
| 1201 | |
| 1202 | // If we had any VLA dimensions, factor them in. |
| 1203 | if (numVLAElements) |
| 1204 | numElements = Builder.CreateNUWMul(numVLAElements, numElements); |
| 1205 | |
| 1206 | return numElements; |
| 1207 | } |
| 1208 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1209 | std::pair<llvm::Value*, QualType> |
| 1210 | CodeGenFunction::getVLASize(QualType type) { |
| 1211 | const VariableArrayType *vla = getContext().getAsVariableArrayType(type); |
| 1212 | assert(vla && "type was not a variable array type!"); |
| 1213 | return getVLASize(vla); |
Anders Carlsson | f666b77 | 2008-12-20 20:27:15 +0000 | [diff] [blame] | 1214 | } |
Anders Carlsson | dcc90d8 | 2008-12-12 07:19:02 +0000 | [diff] [blame] | 1215 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1216 | std::pair<llvm::Value*, QualType> |
| 1217 | CodeGenFunction::getVLASize(const VariableArrayType *type) { |
| 1218 | // The number of elements so far; always size_t. |
| 1219 | llvm::Value *numElements = 0; |
| 1220 | |
| 1221 | QualType elementType; |
| 1222 | do { |
| 1223 | elementType = type->getElementType(); |
| 1224 | llvm::Value *vlaSize = VLASizeMap[type->getSizeExpr()]; |
| 1225 | assert(vlaSize && "no size for VLA!"); |
| 1226 | assert(vlaSize->getType() == SizeTy); |
| 1227 | |
| 1228 | if (!numElements) { |
| 1229 | numElements = vlaSize; |
| 1230 | } else { |
| 1231 | // It's undefined behavior if this wraps around, so mark it that way. |
Richard Smith | 930c05c | 2012-10-10 01:11:12 +0000 | [diff] [blame] | 1232 | // FIXME: Teach -fcatch-undefined-behavior to trap this. |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1233 | numElements = Builder.CreateNUWMul(numElements, vlaSize); |
| 1234 | } |
| 1235 | } while ((type = getContext().getAsVariableArrayType(elementType))); |
| 1236 | |
| 1237 | return std::pair<llvm::Value*,QualType>(numElements, elementType); |
| 1238 | } |
| 1239 | |
| 1240 | void CodeGenFunction::EmitVariablyModifiedType(QualType type) { |
| 1241 | assert(type->isVariablyModifiedType() && |
Anders Carlsson | 60d3541 | 2008-12-20 20:46:34 +0000 | [diff] [blame] | 1242 | "Must pass variably modified type to EmitVLASizes!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1243 | |
Daniel Dunbar | d286f05 | 2009-07-19 06:58:07 +0000 | [diff] [blame] | 1244 | EnsureInsertPoint(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1245 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1246 | // We're going to walk down into the type and look for VLA |
| 1247 | // expressions. |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1248 | do { |
| 1249 | assert(type->isVariablyModifiedType()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1250 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1251 | const Type *ty = type.getTypePtr(); |
| 1252 | switch (ty->getTypeClass()) { |
Abramo Bagnara | 06284c1 | 2012-01-07 10:52:36 +0000 | [diff] [blame] | 1253 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1254 | #define TYPE(Class, Base) |
| 1255 | #define ABSTRACT_TYPE(Class, Base) |
Abramo Bagnara | 06284c1 | 2012-01-07 10:52:36 +0000 | [diff] [blame] | 1256 | #define NON_CANONICAL_TYPE(Class, Base) |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1257 | #define DEPENDENT_TYPE(Class, Base) case Type::Class: |
Abramo Bagnara | 06284c1 | 2012-01-07 10:52:36 +0000 | [diff] [blame] | 1258 | #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1259 | #include "clang/AST/TypeNodes.def" |
Abramo Bagnara | 06284c1 | 2012-01-07 10:52:36 +0000 | [diff] [blame] | 1260 | llvm_unreachable("unexpected dependent type!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1261 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1262 | // These types are never variably-modified. |
| 1263 | case Type::Builtin: |
| 1264 | case Type::Complex: |
| 1265 | case Type::Vector: |
| 1266 | case Type::ExtVector: |
| 1267 | case Type::Record: |
| 1268 | case Type::Enum: |
Abramo Bagnara | 5ff53b2 | 2012-01-11 08:19:46 +0000 | [diff] [blame] | 1269 | case Type::Elaborated: |
| 1270 | case Type::TemplateSpecialization: |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1271 | case Type::ObjCObject: |
| 1272 | case Type::ObjCInterface: |
| 1273 | case Type::ObjCObjectPointer: |
| 1274 | llvm_unreachable("type class is never variably-modified!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1275 | |
Reid Kleckner | 12df246 | 2013-06-24 17:51:48 +0000 | [diff] [blame^] | 1276 | case Type::Decayed: |
| 1277 | type = cast<DecayedType>(ty)->getPointeeType(); |
| 1278 | break; |
| 1279 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1280 | case Type::Pointer: |
| 1281 | type = cast<PointerType>(ty)->getPointeeType(); |
| 1282 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1283 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1284 | case Type::BlockPointer: |
| 1285 | type = cast<BlockPointerType>(ty)->getPointeeType(); |
| 1286 | break; |
| 1287 | |
| 1288 | case Type::LValueReference: |
| 1289 | case Type::RValueReference: |
| 1290 | type = cast<ReferenceType>(ty)->getPointeeType(); |
| 1291 | break; |
| 1292 | |
| 1293 | case Type::MemberPointer: |
| 1294 | type = cast<MemberPointerType>(ty)->getPointeeType(); |
| 1295 | break; |
| 1296 | |
| 1297 | case Type::ConstantArray: |
| 1298 | case Type::IncompleteArray: |
| 1299 | // Losing element qualification here is fine. |
| 1300 | type = cast<ArrayType>(ty)->getElementType(); |
| 1301 | break; |
| 1302 | |
| 1303 | case Type::VariableArray: { |
| 1304 | // Losing element qualification here is fine. |
| 1305 | const VariableArrayType *vat = cast<VariableArrayType>(ty); |
| 1306 | |
| 1307 | // Unknown size indication requires no size computation. |
| 1308 | // Otherwise, evaluate and record it. |
| 1309 | if (const Expr *size = vat->getSizeExpr()) { |
| 1310 | // It's possible that we might have emitted this already, |
| 1311 | // e.g. with a typedef and a pointer to it. |
| 1312 | llvm::Value *&entry = VLASizeMap[size]; |
| 1313 | if (!entry) { |
Richard Smith | 930c05c | 2012-10-10 01:11:12 +0000 | [diff] [blame] | 1314 | llvm::Value *Size = EmitScalarExpr(size); |
| 1315 | |
| 1316 | // C11 6.7.6.2p5: |
| 1317 | // If the size is an expression that is not an integer constant |
| 1318 | // expression [...] each time it is evaluated it shall have a value |
| 1319 | // greater than zero. |
Will Dietz | 4f45bc0 | 2013-01-18 11:30:38 +0000 | [diff] [blame] | 1320 | if (SanOpts->VLABound && |
Richard Smith | d6396a6 | 2012-11-05 22:21:05 +0000 | [diff] [blame] | 1321 | size->getType()->isSignedIntegerType()) { |
Richard Smith | 930c05c | 2012-10-10 01:11:12 +0000 | [diff] [blame] | 1322 | llvm::Value *Zero = llvm::Constant::getNullValue(Size->getType()); |
| 1323 | llvm::Constant *StaticArgs[] = { |
| 1324 | EmitCheckSourceLocation(size->getLocStart()), |
| 1325 | EmitCheckTypeDescriptor(size->getType()) |
| 1326 | }; |
| 1327 | EmitCheck(Builder.CreateICmpSGT(Size, Zero), |
Will Dietz | ad95481 | 2012-12-02 19:50:33 +0000 | [diff] [blame] | 1328 | "vla_bound_not_positive", StaticArgs, Size, |
| 1329 | CRK_Recoverable); |
Richard Smith | 930c05c | 2012-10-10 01:11:12 +0000 | [diff] [blame] | 1330 | } |
| 1331 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1332 | // Always zexting here would be wrong if it weren't |
| 1333 | // undefined behavior to have a negative bound. |
Richard Smith | bf43f2f | 2012-10-10 01:12:11 +0000 | [diff] [blame] | 1334 | entry = Builder.CreateIntCast(Size, SizeTy, /*signed*/ false); |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1335 | } |
| 1336 | } |
| 1337 | type = vat->getElementType(); |
| 1338 | break; |
Anders Carlsson | 60d3541 | 2008-12-20 20:46:34 +0000 | [diff] [blame] | 1339 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1340 | |
Abramo Bagnara | 06284c1 | 2012-01-07 10:52:36 +0000 | [diff] [blame] | 1341 | case Type::FunctionProto: |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1342 | case Type::FunctionNoProto: |
| 1343 | type = cast<FunctionType>(ty)->getResultType(); |
| 1344 | break; |
Eli Friedman | b001de7 | 2011-10-06 23:00:33 +0000 | [diff] [blame] | 1345 | |
Abramo Bagnara | 5ff53b2 | 2012-01-11 08:19:46 +0000 | [diff] [blame] | 1346 | case Type::Paren: |
| 1347 | case Type::TypeOf: |
| 1348 | case Type::UnaryTransform: |
| 1349 | case Type::Attributed: |
| 1350 | case Type::SubstTemplateTypeParm: |
| 1351 | // Keep walking after single level desugaring. |
| 1352 | type = type.getSingleStepDesugaredType(getContext()); |
| 1353 | break; |
| 1354 | |
| 1355 | case Type::Typedef: |
| 1356 | case Type::Decltype: |
| 1357 | case Type::Auto: |
| 1358 | // Stop walking: nothing to do. |
| 1359 | return; |
| 1360 | |
| 1361 | case Type::TypeOfExpr: |
| 1362 | // Stop walking: emit typeof expression. |
| 1363 | EmitIgnoredExpr(cast<TypeOfExprType>(ty)->getUnderlyingExpr()); |
| 1364 | return; |
| 1365 | |
Eli Friedman | b001de7 | 2011-10-06 23:00:33 +0000 | [diff] [blame] | 1366 | case Type::Atomic: |
| 1367 | type = cast<AtomicType>(ty)->getValueType(); |
| 1368 | break; |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1369 | } |
| 1370 | } while (type->isVariablyModifiedType()); |
Anders Carlsson | dcc90d8 | 2008-12-12 07:19:02 +0000 | [diff] [blame] | 1371 | } |
Eli Friedman | 4fd0aa5 | 2009-01-20 17:46:04 +0000 | [diff] [blame] | 1372 | |
| 1373 | llvm::Value* CodeGenFunction::EmitVAListRef(const Expr* E) { |
Dan Gohman | bc07a55 | 2010-10-29 22:47:07 +0000 | [diff] [blame] | 1374 | if (getContext().getBuiltinVaListType()->isArrayType()) |
Eli Friedman | 4fd0aa5 | 2009-01-20 17:46:04 +0000 | [diff] [blame] | 1375 | return EmitScalarExpr(E); |
Eli Friedman | 4fd0aa5 | 2009-01-20 17:46:04 +0000 | [diff] [blame] | 1376 | return EmitLValue(E).getAddress(); |
| 1377 | } |
Anders Carlsson | 6ccc476 | 2009-02-07 22:53:43 +0000 | [diff] [blame] | 1378 | |
Michael Ilseman | 9dce4b3 | 2012-12-04 00:29:55 +0000 | [diff] [blame] | 1379 | void CodeGenFunction::EmitDeclRefExprDbgValue(const DeclRefExpr *E, |
John McCall | 189d6ef | 2010-10-09 01:34:31 +0000 | [diff] [blame] | 1380 | llvm::Constant *Init) { |
Devang Patel | 25c2c8f | 2010-08-10 17:53:33 +0000 | [diff] [blame] | 1381 | assert (Init && "Invalid DeclRefExpr initializer!"); |
| 1382 | if (CGDebugInfo *Dbg = getDebugInfo()) |
Douglas Gregor | 4cdad31 | 2012-10-23 20:05:01 +0000 | [diff] [blame] | 1383 | if (CGM.getCodeGenOpts().getDebugInfo() >= CodeGenOptions::LimitedDebugInfo) |
Alexey Samsonov | fd00eec | 2012-05-04 07:39:27 +0000 | [diff] [blame] | 1384 | Dbg->EmitGlobalVariable(E->getDecl(), Init); |
Devang Patel | 8d30838 | 2010-08-10 07:24:25 +0000 | [diff] [blame] | 1385 | } |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1386 | |
| 1387 | CodeGenFunction::PeepholeProtection |
| 1388 | CodeGenFunction::protectFromPeepholes(RValue rvalue) { |
| 1389 | // At the moment, the only aggressive peephole we do in IR gen |
| 1390 | // is trunc(zext) folding, but if we add more, we can easily |
| 1391 | // extend this protection. |
| 1392 | |
| 1393 | if (!rvalue.isScalar()) return PeepholeProtection(); |
| 1394 | llvm::Value *value = rvalue.getScalarVal(); |
| 1395 | if (!isa<llvm::ZExtInst>(value)) return PeepholeProtection(); |
| 1396 | |
| 1397 | // Just make an extra bitcast. |
| 1398 | assert(HaveInsertPoint()); |
| 1399 | llvm::Instruction *inst = new llvm::BitCastInst(value, value->getType(), "", |
| 1400 | Builder.GetInsertBlock()); |
| 1401 | |
| 1402 | PeepholeProtection protection; |
| 1403 | protection.Inst = inst; |
| 1404 | return protection; |
| 1405 | } |
| 1406 | |
| 1407 | void CodeGenFunction::unprotectFromPeepholes(PeepholeProtection protection) { |
| 1408 | if (!protection.Inst) return; |
| 1409 | |
| 1410 | // In theory, we could try to duplicate the peepholes now, but whatever. |
| 1411 | protection.Inst->eraseFromParent(); |
| 1412 | } |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1413 | |
| 1414 | llvm::Value *CodeGenFunction::EmitAnnotationCall(llvm::Value *AnnotationFn, |
| 1415 | llvm::Value *AnnotatedVal, |
Dmitri Gribenko | cfa88f8 | 2013-01-12 19:30:44 +0000 | [diff] [blame] | 1416 | StringRef AnnotationStr, |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1417 | SourceLocation Location) { |
| 1418 | llvm::Value *Args[4] = { |
| 1419 | AnnotatedVal, |
| 1420 | Builder.CreateBitCast(CGM.EmitAnnotationString(AnnotationStr), Int8PtrTy), |
| 1421 | Builder.CreateBitCast(CGM.EmitAnnotationUnit(Location), Int8PtrTy), |
| 1422 | CGM.EmitAnnotationLineNo(Location) |
| 1423 | }; |
| 1424 | return Builder.CreateCall(AnnotationFn, Args); |
| 1425 | } |
| 1426 | |
| 1427 | void CodeGenFunction::EmitVarAnnotations(const VarDecl *D, llvm::Value *V) { |
| 1428 | assert(D->hasAttr<AnnotateAttr>() && "no annotate attribute"); |
| 1429 | // FIXME We create a new bitcast for every annotation because that's what |
| 1430 | // llvm-gcc was doing. |
| 1431 | for (specific_attr_iterator<AnnotateAttr> |
| 1432 | ai = D->specific_attr_begin<AnnotateAttr>(), |
| 1433 | ae = D->specific_attr_end<AnnotateAttr>(); ai != ae; ++ai) |
| 1434 | EmitAnnotationCall(CGM.getIntrinsic(llvm::Intrinsic::var_annotation), |
| 1435 | Builder.CreateBitCast(V, CGM.Int8PtrTy, V->getName()), |
| 1436 | (*ai)->getAnnotation(), D->getLocation()); |
| 1437 | } |
| 1438 | |
| 1439 | llvm::Value *CodeGenFunction::EmitFieldAnnotations(const FieldDecl *D, |
| 1440 | llvm::Value *V) { |
| 1441 | assert(D->hasAttr<AnnotateAttr>() && "no annotate attribute"); |
| 1442 | llvm::Type *VTy = V->getType(); |
| 1443 | llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::ptr_annotation, |
| 1444 | CGM.Int8PtrTy); |
| 1445 | |
| 1446 | for (specific_attr_iterator<AnnotateAttr> |
| 1447 | ai = D->specific_attr_begin<AnnotateAttr>(), |
| 1448 | ae = D->specific_attr_end<AnnotateAttr>(); ai != ae; ++ai) { |
| 1449 | // FIXME Always emit the cast inst so we can differentiate between |
| 1450 | // annotation on the first field of a struct and annotation on the struct |
| 1451 | // itself. |
| 1452 | if (VTy != CGM.Int8PtrTy) |
| 1453 | V = Builder.Insert(new llvm::BitCastInst(V, CGM.Int8PtrTy)); |
| 1454 | V = EmitAnnotationCall(F, V, (*ai)->getAnnotation(), D->getLocation()); |
| 1455 | V = Builder.CreateBitCast(V, VTy); |
| 1456 | } |
| 1457 | |
| 1458 | return V; |
| 1459 | } |
Ben Langmuir | 524387a | 2013-05-09 19:17:11 +0000 | [diff] [blame] | 1460 | |
| 1461 | CodeGenFunction::CGCapturedStmtInfo::~CGCapturedStmtInfo() { } |