CodeGenFunction.cpp revision 35415f5132f70ad5097a3514ab84251e10db3664
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- CodeGenFunction.cpp - Emit LLVM Code from ASTs for a Function ----===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This coordinates the per-function state used while generating code. 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "CodeGenFunction.h" 155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "CodeGenModule.h" 163f2af1002249c8acc9ce17f1fc50324864feb8e1Eli Friedman#include "CGDebugInfo.h" 175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/TargetInfo.h" 1831a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner#include "clang/AST/APValue.h" 19de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/ASTContext.h" 20c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/Decl.h" 212b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson#include "clang/AST/DeclCXX.h" 226a1e0eb557d47e85185e09bdf8721f53f4bf9c9cMike Stump#include "clang/AST/StmtCXX.h" 234e7a1f7682d94811bd41fca8aefccc38f686db23Mike Stump#include "llvm/Target/TargetData.h" 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 271eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpCodeGenFunction::CodeGenFunction(CodeGenModule &cgm) 28a4f668f3b7e03629066a01b04e415cb2b4655dafMike Stump : BlockFunction(cgm, *this, Builder), CGM(cgm), 29a4f668f3b7e03629066a01b04e415cb2b4655dafMike Stump Target(CGM.getContext().Target), 30aac8705c046f01a264a4f82832895a5d9e695633Owen Anderson Builder(cgm.getModule().getContext()), 31d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner DebugInfo(0), IndirectBranch(0), 323d00fdc82fd550ae4bfbb2e700a1fc85bbd6d6fdChris Lattner SwitchInsn(0), CaseRangeBlock(0), InvokeDest(0), 332504941793b549323f9d29c62507cf21d865fadeJohn McCall CXXThisDecl(0), CXXThisValue(0), CXXVTTDecl(0), CXXVTTValue(0), 3415037caa1542bb810ad54c653aeb80f61df7b00cMike Stump ConditionalBranchLevel(0), TerminateHandler(0), TrapBB(0), 35be07f60131bc6f8d6696f4644df1ef667a1730d5Mike Stump UniqueAggrDestructorCount(0) { 364e7a1f7682d94811bd41fca8aefccc38f686db23Mike Stump LLVMIntTy = ConvertType(getContext().IntTy); 374e7a1f7682d94811bd41fca8aefccc38f686db23Mike Stump LLVMPointerWidth = Target.getPointerWidth(0); 38d88ea5687968640ada2bc5a10211cbeb68a671ecMike Stump Exceptions = getContext().getLangOptions().Exceptions; 399c276ae0f24d4cee8f7954069d4b8eae45d0447dMike Stump CatchUndefined = getContext().getLangOptions().CatchUndefined; 4035415f5132f70ad5097a3514ab84251e10db3664Douglas Gregor CGM.getMangleContext().startNewFunction(); 414111024be81e7c0525e42dadcc126d27e5bf2425Chris Lattner} 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerASTContext &CodeGenFunction::getContext() const { 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return CGM.getContext(); 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerllvm::BasicBlock *CodeGenFunction::getBasicBlockForLabel(const LabelStmt *S) { 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::BasicBlock *&BB = LabelMap[S]; 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BB) return BB; 511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Create, but don't insert, the new block. 5355e874299f2ad827646a4ca9ea38c402aaeb38c9Daniel Dunbar return BB = createBasicBlock(S->getName()); 545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 560096acf421c4609ce7f43e8b05f8c5ca866d4611Daniel Dunbarllvm::Value *CodeGenFunction::GetAddrOfLocalVar(const VarDecl *VD) { 570096acf421c4609ce7f43e8b05f8c5ca866d4611Daniel Dunbar llvm::Value *Res = LocalDeclMap[VD]; 580096acf421c4609ce7f43e8b05f8c5ca866d4611Daniel Dunbar assert(Res && "Invalid argument to GetAddrOfLocalVar(), no decl!"); 590096acf421c4609ce7f43e8b05f8c5ca866d4611Daniel Dunbar return Res; 60813733577d33ec56479667b49e1bff42dc6bba90Lauro Ramos Venancio} 615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 620096acf421c4609ce7f43e8b05f8c5ca866d4611Daniel Dunbarllvm::Constant * 630096acf421c4609ce7f43e8b05f8c5ca866d4611Daniel DunbarCodeGenFunction::GetAddrOfStaticLocalVar(const VarDecl *BVD) { 640096acf421c4609ce7f43e8b05f8c5ca866d4611Daniel Dunbar return cast<llvm::Constant>(GetAddrOfLocalVar(BVD)); 65dde0a94120915fa925d1ffcdb997c7b44dc9fa21Anders Carlsson} 66dde0a94120915fa925d1ffcdb997c7b44dc9fa21Anders Carlsson 678b1a343b6b360d63d5dc8a6beb841ce4414c1e00Daniel Dunbarconst llvm::Type *CodeGenFunction::ConvertTypeForMem(QualType T) { 688b1a343b6b360d63d5dc8a6beb841ce4414c1e00Daniel Dunbar return CGM.getTypes().ConvertTypeForMem(T); 698b1a343b6b360d63d5dc8a6beb841ce4414c1e00Daniel Dunbar} 708b1a343b6b360d63d5dc8a6beb841ce4414c1e00Daniel Dunbar 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerconst llvm::Type *CodeGenFunction::ConvertType(QualType T) { 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return CGM.getTypes().ConvertType(T); 735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 754111024be81e7c0525e42dadcc126d27e5bf2425Chris Lattnerbool CodeGenFunction::hasAggregateLLVMType(QualType T) { 76e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson return T->isRecordType() || T->isArrayType() || T->isAnyComplexType() || 77e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson T->isMemberFunctionPointerType(); 784111024be81e7c0525e42dadcc126d27e5bf2425Chris Lattner} 79391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner 801c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbarvoid CodeGenFunction::EmitReturnBlock() { 811c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar // For cleanliness, we try to avoid emitting the return block for 821c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar // simple cases. 831c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar llvm::BasicBlock *CurBB = Builder.GetInsertBlock(); 841c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar 851c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar if (CurBB) { 861c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar assert(!CurBB->getTerminator() && "Unexpected terminated block."); 871c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar 8896e18b05ea6b55aa92a1a576f29e9cee73a7e20bDaniel Dunbar // We have a valid insert point, reuse it if it is empty or there are no 8996e18b05ea6b55aa92a1a576f29e9cee73a7e20bDaniel Dunbar // explicit jumps to the return block. 9096e18b05ea6b55aa92a1a576f29e9cee73a7e20bDaniel Dunbar if (CurBB->empty() || ReturnBlock->use_empty()) { 9196e18b05ea6b55aa92a1a576f29e9cee73a7e20bDaniel Dunbar ReturnBlock->replaceAllUsesWith(CurBB); 921c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar delete ReturnBlock; 9396e18b05ea6b55aa92a1a576f29e9cee73a7e20bDaniel Dunbar } else 941c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar EmitBlock(ReturnBlock); 951c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar return; 961c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar } 971c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar 981c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar // Otherwise, if the return block is the target of a single direct 991c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar // branch then we can just put the code in that block instead. This 1001c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar // cleans up functions which started with a unified return block. 1011c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar if (ReturnBlock->hasOneUse()) { 1021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::BranchInst *BI = 1031c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar dyn_cast<llvm::BranchInst>(*ReturnBlock->use_begin()); 1041c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar if (BI && BI->isUnconditional() && BI->getSuccessor(0) == ReturnBlock) { 1051c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar // Reset insertion point and delete the branch. 1061c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar Builder.SetInsertPoint(BI->getParent()); 1071c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar BI->eraseFromParent(); 1081c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar delete ReturnBlock; 1091c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar return; 1101c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar } 1111c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar } 1121c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar 113f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: We are at an unreachable point, there is no reason to emit the block 114f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // unless it has uses. However, we still need a place to put the debug 115f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // region.end for now. 1161c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar 1171c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar EmitBlock(ReturnBlock); 1181c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar} 1191c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar 120af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbarvoid CodeGenFunction::FinishFunction(SourceLocation EndLoc) { 121391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner assert(BreakContinueStack.empty() && 122391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner "mismatched push/pop in break/continue stack!"); 123bd6fa3d032acd7eafc6c10827c41103df45beab7Anders Carlsson assert(BlockScopes.empty() && 124bd6fa3d032acd7eafc6c10827c41103df45beab7Anders Carlsson "did not remove all blocks from block scope map!"); 125bd6fa3d032acd7eafc6c10827c41103df45beab7Anders Carlsson assert(CleanupEntries.empty() && 126bd6fa3d032acd7eafc6c10827c41103df45beab7Anders Carlsson "mismatched push/pop in cleanup stack!"); 1271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Emit function epilog (to return). 1291c1d6074f5a0296dd273362655b1b8f9057289e3Daniel Dunbar EmitReturnBlock(); 130f5bd45c8e6fa7519cdc17ec3ff4917e279c6a041Daniel Dunbar 131f5bd45c8e6fa7519cdc17ec3ff4917e279c6a041Daniel Dunbar // Emit debug descriptor for function end. 132e896d98548b02223c7740d807a0aa6e20fba7079Anders Carlsson if (CGDebugInfo *DI = getDebugInfo()) { 133f5bd45c8e6fa7519cdc17ec3ff4917e279c6a041Daniel Dunbar DI->setLocation(EndLoc); 134f5bd45c8e6fa7519cdc17ec3ff4917e279c6a041Daniel Dunbar DI->EmitRegionEnd(CurFn, Builder); 135f5bd45c8e6fa7519cdc17ec3ff4917e279c6a041Daniel Dunbar } 136f5bd45c8e6fa7519cdc17ec3ff4917e279c6a041Daniel Dunbar 13788b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbar EmitFunctionEpilog(*CurFnInfo, ReturnValue); 138cce3d4f9812182ed4e551b7cf0fc86576be8d9c5Mike Stump EmitEndEHSpec(CurCodeDecl); 1395ca2084cf9b529563209429857f01fdae9dcdfa5Daniel Dunbar 140d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner // If someone did an indirect goto, emit the indirect goto block at the end of 141d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner // the function. 142d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner if (IndirectBranch) { 143d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner EmitBlock(IndirectBranch->getParent()); 144d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner Builder.ClearInsertionPoint(); 145d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner } 146d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner 147391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner // Remove the AllocaInsertPt instruction, which is just a convenience for us. 148481769b5dc102b0256b35581e787909ad5edfab5Chris Lattner llvm::Instruction *Ptr = AllocaInsertPt; 149391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner AllocaInsertPt = 0; 150481769b5dc102b0256b35581e787909ad5edfab5Chris Lattner Ptr->eraseFromParent(); 151d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner 152d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner // If someone took the address of a label but never did an indirect goto, we 153d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner // made a zero entry PHI node, which is illegal, zap it now. 154d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner if (IndirectBranch) { 155d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner llvm::PHINode *PN = cast<llvm::PHINode>(IndirectBranch->getAddress()); 156d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner if (PN->getNumIncomingValues() == 0) { 157d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner PN->replaceAllUsesWith(llvm::UndefValue::get(PN->getType())); 158d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner PN->eraseFromParent(); 159d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner } 160d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner } 161c8aa5f1f264fb230c38182adab944232bb160c2bChris Lattner} 162c8aa5f1f264fb230c38182adab944232bb160c2bChris Lattner 1630ff8bafde95f6fa51ccea70738c1b99db870bddcAnders Carlssonvoid CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy, 1647c086516f3cc9fba2733b1919973206c6ba4b171Daniel Dunbar llvm::Function *Fn, 1652284ac9ec80299fcdefae9a2787cf85105a0f203Daniel Dunbar const FunctionArgList &Args, 1662284ac9ec80299fcdefae9a2787cf85105a0f203Daniel Dunbar SourceLocation StartLoc) { 1670ff8bafde95f6fa51ccea70738c1b99db870bddcAnders Carlsson const Decl *D = GD.getDecl(); 1680ff8bafde95f6fa51ccea70738c1b99db870bddcAnders Carlsson 1694cc1a4703363ff940b6273aeef9d96a87edeb04bAnders Carlsson DidCallStackSave = false; 170b5437d238752dc297e42410e98d38d5250fe0463Chris Lattner CurCodeDecl = CurFuncDecl = D; 1717c086516f3cc9fba2733b1919973206c6ba4b171Daniel Dunbar FnRetTy = RetTy; 172bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar CurFn = Fn; 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurFn->isDeclaration() && "Function already has body?"); 174ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner 175a3fe2842e0cf953241ccc05809afdf84f13798e9Jakob Stoklund Olesen // Pass inline keyword to optimizer if it appears explicitly on any 176a3fe2842e0cf953241ccc05809afdf84f13798e9Jakob Stoklund Olesen // declaration. 177a3fe2842e0cf953241ccc05809afdf84f13798e9Jakob Stoklund Olesen if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D)) 178a3fe2842e0cf953241ccc05809afdf84f13798e9Jakob Stoklund Olesen for (FunctionDecl::redecl_iterator RI = FD->redecls_begin(), 179a3fe2842e0cf953241ccc05809afdf84f13798e9Jakob Stoklund Olesen RE = FD->redecls_end(); RI != RE; ++RI) 180a3fe2842e0cf953241ccc05809afdf84f13798e9Jakob Stoklund Olesen if (RI->isInlineSpecified()) { 181a3fe2842e0cf953241ccc05809afdf84f13798e9Jakob Stoklund Olesen Fn->addFnAttr(llvm::Attribute::InlineHint); 182a3fe2842e0cf953241ccc05809afdf84f13798e9Jakob Stoklund Olesen break; 183a3fe2842e0cf953241ccc05809afdf84f13798e9Jakob Stoklund Olesen } 184a3fe2842e0cf953241ccc05809afdf84f13798e9Jakob Stoklund Olesen 18555e874299f2ad827646a4ca9ea38c402aaeb38c9Daniel Dunbar llvm::BasicBlock *EntryBB = createBasicBlock("entry", CurFn); 1865ca2084cf9b529563209429857f01fdae9dcdfa5Daniel Dunbar 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Create a marker to make it easy to insert allocas into the entryblock 18855352a2d616cf9fbb621d10faf8b960b4b268bd8Chris Lattner // later. Don't create this with the builder, because we don't want it 18955352a2d616cf9fbb621d10faf8b960b4b268bd8Chris Lattner // folded. 1900032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Value *Undef = llvm::UndefValue::get(llvm::Type::getInt32Ty(VMContext)); 191bcdc0f0aff015b6507560f50c71d1b7b6c6a9932Mike Stump AllocaInsertPt = new llvm::BitCastInst(Undef, 192bcdc0f0aff015b6507560f50c71d1b7b6c6a9932Mike Stump llvm::Type::getInt32Ty(VMContext), "", 19355352a2d616cf9fbb621d10faf8b960b4b268bd8Chris Lattner EntryBB); 194f1466848dce9c4c75d96a6cabdc8db560e26aac8Chris Lattner if (Builder.isNamePreserving()) 195f1466848dce9c4c75d96a6cabdc8db560e26aac8Chris Lattner AllocaInsertPt->setName("allocapt"); 1961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19755e874299f2ad827646a4ca9ea38c402aaeb38c9Daniel Dunbar ReturnBlock = createBasicBlock("return"); 1981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19955352a2d616cf9fbb621d10faf8b960b4b268bd8Chris Lattner Builder.SetInsertPoint(EntryBB); 2001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 201ce056bcaa1c97b89a4b2de2112c62d060863be2bDouglas Gregor QualType FnType = getContext().getFunctionType(RetTy, 0, 0, false, 0, 202ce056bcaa1c97b89a4b2de2112c62d060863be2bDouglas Gregor false, false, 0, 0, 203264ba48dc98f3f843935a485d5b086f7e0fdc4f1Rafael Espindola /*FIXME?*/ 204264ba48dc98f3f843935a485d5b086f7e0fdc4f1Rafael Espindola FunctionType::ExtInfo()); 20591cc815ffd13d4a78ae1b5bd617e19dd555de4f4Mike Stump 206af99417156c652a6f04dff643925036dc3241d60Sanjiv Gupta // Emit subprogram debug descriptor. 207e896d98548b02223c7740d807a0aa6e20fba7079Anders Carlsson if (CGDebugInfo *DI = getDebugInfo()) { 2082284ac9ec80299fcdefae9a2787cf85105a0f203Daniel Dunbar DI->setLocation(StartLoc); 2099c6c3a0e3ae09626d2d4b04e4ffa42c3d7cab32bDevang Patel DI->EmitFunctionStart(GD, FnType, CurFn, Builder); 210af99417156c652a6f04dff643925036dc3241d60Sanjiv Gupta } 211af99417156c652a6f04dff643925036dc3241d60Sanjiv Gupta 21288b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbar // FIXME: Leaked. 21304a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall // CC info is ignored, hopefully? 21404a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall CurFnInfo = &CGM.getTypes().getFunctionInfo(FnRetTy, Args, 215264ba48dc98f3f843935a485d5b086f7e0fdc4f1Rafael Espindola FunctionType::ExtInfo()); 216b17daf9ab790ae71aacad2cc4aa11cd8d86c25d1Eli Friedman 217b17daf9ab790ae71aacad2cc4aa11cd8d86c25d1Eli Friedman if (RetTy->isVoidType()) { 218b17daf9ab790ae71aacad2cc4aa11cd8d86c25d1Eli Friedman // Void type; nothing to return. 219b17daf9ab790ae71aacad2cc4aa11cd8d86c25d1Eli Friedman ReturnValue = 0; 220b17daf9ab790ae71aacad2cc4aa11cd8d86c25d1Eli Friedman } else if (CurFnInfo->getReturnInfo().getKind() == ABIArgInfo::Indirect && 221b17daf9ab790ae71aacad2cc4aa11cd8d86c25d1Eli Friedman hasAggregateLLVMType(CurFnInfo->getReturnType())) { 222b17daf9ab790ae71aacad2cc4aa11cd8d86c25d1Eli Friedman // Indirect aggregate return; emit returned value directly into sret slot. 223647a1ec397fa13af176d07d9f5d071560a94c7a9Daniel Dunbar // This reduces code size, and affects correctness in C++. 224b17daf9ab790ae71aacad2cc4aa11cd8d86c25d1Eli Friedman ReturnValue = CurFn->arg_begin(); 225b17daf9ab790ae71aacad2cc4aa11cd8d86c25d1Eli Friedman } else { 226647a1ec397fa13af176d07d9f5d071560a94c7a9Daniel Dunbar ReturnValue = CreateIRTemp(RetTy, "retval"); 227b17daf9ab790ae71aacad2cc4aa11cd8d86c25d1Eli Friedman } 228b17daf9ab790ae71aacad2cc4aa11cd8d86c25d1Eli Friedman 229cce3d4f9812182ed4e551b7cf0fc86576be8d9c5Mike Stump EmitStartEHSpec(CurCodeDecl); 23088b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbar EmitFunctionProlog(*CurFnInfo, CurFn, Args); 2311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2322504941793b549323f9d29c62507cf21d865fadeJohn McCall if (CXXThisDecl) 2332504941793b549323f9d29c62507cf21d865fadeJohn McCall CXXThisValue = Builder.CreateLoad(LocalDeclMap[CXXThisDecl], "this"); 2342504941793b549323f9d29c62507cf21d865fadeJohn McCall if (CXXVTTDecl) 2352504941793b549323f9d29c62507cf21d865fadeJohn McCall CXXVTTValue = Builder.CreateLoad(LocalDeclMap[CXXVTTDecl], "vtt"); 2362504941793b549323f9d29c62507cf21d865fadeJohn McCall 237751358ff73b155f5384e151e1d18aa3f6e7b061cAnders Carlsson // If any of the arguments have a variably modified type, make sure to 238751358ff73b155f5384e151e1d18aa3f6e7b061cAnders Carlsson // emit the type size. 239751358ff73b155f5384e151e1d18aa3f6e7b061cAnders Carlsson for (FunctionArgList::const_iterator i = Args.begin(), e = Args.end(); 240751358ff73b155f5384e151e1d18aa3f6e7b061cAnders Carlsson i != e; ++i) { 241751358ff73b155f5384e151e1d18aa3f6e7b061cAnders Carlsson QualType Ty = i->second; 242751358ff73b155f5384e151e1d18aa3f6e7b061cAnders Carlsson 243751358ff73b155f5384e151e1d18aa3f6e7b061cAnders Carlsson if (Ty->isVariablyModifiedType()) 244751358ff73b155f5384e151e1d18aa3f6e7b061cAnders Carlsson EmitVLASize(Ty); 245751358ff73b155f5384e151e1d18aa3f6e7b061cAnders Carlsson } 2467c086516f3cc9fba2733b1919973206c6ba4b171Daniel Dunbar} 247eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman 2489fc6a7774643a810c8501dae2323e863fefb623eJohn McCallvoid CodeGenFunction::EmitFunctionBody(FunctionArgList &Args) { 2499fc6a7774643a810c8501dae2323e863fefb623eJohn McCall const FunctionDecl *FD = cast<FunctionDecl>(CurGD.getDecl()); 25006a9f3680d22529a2fcf20c52d71cf221d99d910Douglas Gregor assert(FD->getBody()); 25106a9f3680d22529a2fcf20c52d71cf221d99d910Douglas Gregor EmitStmt(FD->getBody()); 252a355e07454463b19829ac92ffd115a097faff0e0John McCall} 253a355e07454463b19829ac92ffd115a097faff0e0John McCall 254c997d4278d329e18891aac9698fb991b2d4622ebAnders Carlssonvoid CodeGenFunction::GenerateCode(GlobalDecl GD, llvm::Function *Fn) { 2550ff8bafde95f6fa51ccea70738c1b99db870bddcAnders Carlsson const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); 2560ff8bafde95f6fa51ccea70738c1b99db870bddcAnders Carlsson 257e896d98548b02223c7740d807a0aa6e20fba7079Anders Carlsson // Check if we should generate debug info for this function. 2581feade8e520be483293dbf55eb57a51720899589Mike Stump if (CGM.getDebugInfo() && !FD->hasAttr<NoDebugAttr>()) 259e896d98548b02223c7740d807a0aa6e20fba7079Anders Carlsson DebugInfo = CGM.getDebugInfo(); 2601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2617c086516f3cc9fba2733b1919973206c6ba4b171Daniel Dunbar FunctionArgList Args; 2621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2636a1e0eb557d47e85185e09bdf8721f53f4bf9c9cMike Stump CurGD = GD; 2642b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 2652b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (MD->isInstance()) { 2662b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // Create the implicit 'this' decl. 2672b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // FIXME: I'm not entirely sure I like using a fake decl just for code 2682b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // generation. Maybe we can come up with a better way? 2692504941793b549323f9d29c62507cf21d865fadeJohn McCall CXXThisDecl = ImplicitParamDecl::Create(getContext(), 0, 2702504941793b549323f9d29c62507cf21d865fadeJohn McCall FD->getLocation(), 2711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump &getContext().Idents.get("this"), 2722b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson MD->getThisType(getContext())); 2732b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Args.push_back(std::make_pair(CXXThisDecl, CXXThisDecl->getType())); 274f6c56e2323c3f973253805a2f35629f3253ebed4Anders Carlsson 275f6c56e2323c3f973253805a2f35629f3253ebed4Anders Carlsson // Check if we need a VTT parameter as well. 276af4403545a50a60d208e6fcae057308d576a92e0Anders Carlsson if (CodeGenVTables::needsVTTParameter(GD)) { 277f6c56e2323c3f973253805a2f35629f3253ebed4Anders Carlsson // FIXME: The comment about using a fake decl above applies here too. 278f6c56e2323c3f973253805a2f35629f3253ebed4Anders Carlsson QualType T = getContext().getPointerType(getContext().VoidPtrTy); 279f6c56e2323c3f973253805a2f35629f3253ebed4Anders Carlsson CXXVTTDecl = 2802504941793b549323f9d29c62507cf21d865fadeJohn McCall ImplicitParamDecl::Create(getContext(), 0, FD->getLocation(), 281f6c56e2323c3f973253805a2f35629f3253ebed4Anders Carlsson &getContext().Idents.get("vtt"), T); 282f6c56e2323c3f973253805a2f35629f3253ebed4Anders Carlsson Args.push_back(std::make_pair(CXXVTTDecl, CXXVTTDecl->getType())); 283f6c56e2323c3f973253805a2f35629f3253ebed4Anders Carlsson } 2842b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson } 2852b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson } 2861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 287eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman if (FD->getNumParams()) { 288183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const FunctionProtoType* FProto = FD->getType()->getAs<FunctionProtoType>(); 289eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman assert(FProto && "Function def must have prototype!"); 2907c086516f3cc9fba2733b1919973206c6ba4b171Daniel Dunbar 2917c086516f3cc9fba2733b1919973206c6ba4b171Daniel Dunbar for (unsigned i = 0, e = FD->getNumParams(); i != e; ++i) 2921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Args.push_back(std::make_pair(FD->getParamDecl(i), 2937c086516f3cc9fba2733b1919973206c6ba4b171Daniel Dunbar FProto->getArgType(i))); 2945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 295af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 296a355e07454463b19829ac92ffd115a097faff0e0John McCall SourceRange BodyRange; 297a355e07454463b19829ac92ffd115a097faff0e0John McCall if (Stmt *Body = FD->getBody()) BodyRange = Body->getSourceRange(); 2984365bba95be15342575b4f030c6583a770a5da3dAnders Carlsson 299a355e07454463b19829ac92ffd115a097faff0e0John McCall // Emit the standard function prologue. 300a355e07454463b19829ac92ffd115a097faff0e0John McCall StartFunction(GD, FD->getResultType(), Fn, Args, BodyRange.getBegin()); 3011851a12605bc6f1ea70d11974a315340ebaab6ebAnders Carlsson 302a355e07454463b19829ac92ffd115a097faff0e0John McCall // Generate the body of the function. 3039fc6a7774643a810c8501dae2323e863fefb623eJohn McCall if (isa<CXXDestructorDecl>(FD)) 3049fc6a7774643a810c8501dae2323e863fefb623eJohn McCall EmitDestructorBody(Args); 3059fc6a7774643a810c8501dae2323e863fefb623eJohn McCall else if (isa<CXXConstructorDecl>(FD)) 3069fc6a7774643a810c8501dae2323e863fefb623eJohn McCall EmitConstructorBody(Args); 3079fc6a7774643a810c8501dae2323e863fefb623eJohn McCall else 3089fc6a7774643a810c8501dae2323e863fefb623eJohn McCall EmitFunctionBody(Args); 309c33e4ba20304e222692e77f2c6ad26a5d8d32f83Anders Carlsson 310a355e07454463b19829ac92ffd115a097faff0e0John McCall // Emit the standard function epilogue. 311a355e07454463b19829ac92ffd115a097faff0e0John McCall FinishFunction(BodyRange.getEnd()); 3121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3132b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // Destroy the 'this' declaration. 3142b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (CXXThisDecl) 3152b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson CXXThisDecl->Destroy(getContext()); 316f6c56e2323c3f973253805a2f35629f3253ebed4Anders Carlsson 317f6c56e2323c3f973253805a2f35629f3253ebed4Anders Carlsson // Destroy the VTT declaration. 318f6c56e2323c3f973253805a2f35629f3253ebed4Anders Carlsson if (CXXVTTDecl) 319f6c56e2323c3f973253805a2f35629f3253ebed4Anders Carlsson CXXVTTDecl->Destroy(getContext()); 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3220946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner/// ContainsLabel - Return true if the statement contains a label in it. If 3230946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner/// this statement is not executed normally, it not containing a label means 3240946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner/// that we can just remove the code. 3250946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattnerbool CodeGenFunction::ContainsLabel(const Stmt *S, bool IgnoreCaseStmts) { 3260946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner // Null statement, not a label! 3270946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner if (S == 0) return false; 3281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3290946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner // If this is a label, we have to emit the code, consider something like: 3300946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner // if (0) { ... foo: bar(); } goto foo; 3310946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner if (isa<LabelStmt>(S)) 3320946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner return true; 3331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3340946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner // If this is a case/default statement, and we haven't seen a switch, we have 3350946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner // to emit the code. 3360946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner if (isa<SwitchCase>(S) && !IgnoreCaseStmts) 3370946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner return true; 3381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3390946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner // If this is a switch statement, we want to ignore cases below it. 3400946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner if (isa<SwitchStmt>(S)) 3410946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner IgnoreCaseStmts = true; 3421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3430946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner // Scan subexpressions for verboten labels. 3440946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner for (Stmt::const_child_iterator I = S->child_begin(), E = S->child_end(); 3450946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner I != E; ++I) 3460946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner if (ContainsLabel(*I, IgnoreCaseStmts)) 3470946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner return true; 3481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3490946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner return false; 3500946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner} 3510946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner 35231a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner 35331a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner/// ConstantFoldsToSimpleInteger - If the sepcified expression does not fold to 35431a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner/// a constant, or if it does but contains a label, return 0. If it constant 35531a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner/// folds to 'true' and does not contain a label, return 1, if it constant folds 35631a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner/// to 'false' and does not contain a label, return -1. 35731a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattnerint CodeGenFunction::ConstantFoldsToSimpleInteger(const Expr *Cond) { 35836bc14c3a1cf63ee306df5687ac8e85f924f8639Daniel Dunbar // FIXME: Rename and handle conversion of other evaluatable things 35936bc14c3a1cf63ee306df5687ac8e85f924f8639Daniel Dunbar // to bool. 36064712f196bffd41fb0552c2643b07a25c3e45082Anders Carlsson Expr::EvalResult Result; 3611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!Cond->Evaluate(Result, getContext()) || !Result.Val.isInt() || 36264712f196bffd41fb0552c2643b07a25c3e45082Anders Carlsson Result.HasSideEffects) 363ef5a66d8171eb95e948107f8ee7707b360aaff25Anders Carlsson return 0; // Not foldable, not integer or not fully evaluatable. 3641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 36531a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner if (CodeGenFunction::ContainsLabel(Cond)) 36631a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner return 0; // Contains a label. 3671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 36864712f196bffd41fb0552c2643b07a25c3e45082Anders Carlsson return Result.Val.getInt().getBoolValue() ? 1 : -1; 36931a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner} 37031a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner 37131a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner 37231a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner/// EmitBranchOnBoolExpr - Emit a branch on a boolean condition (e.g. for an if 37331a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner/// statement) to the specified blocks. Based on the condition, this might try 37431a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner/// to simplify the codegen of the conditional based on the branch. 37531a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner/// 37631a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattnervoid CodeGenFunction::EmitBranchOnBoolExpr(const Expr *Cond, 37731a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner llvm::BasicBlock *TrueBlock, 37831a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner llvm::BasicBlock *FalseBlock) { 37931a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner if (const ParenExpr *PE = dyn_cast<ParenExpr>(Cond)) 38031a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner return EmitBranchOnBoolExpr(PE->getSubExpr(), TrueBlock, FalseBlock); 3811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 38231a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner if (const BinaryOperator *CondBOp = dyn_cast<BinaryOperator>(Cond)) { 38331a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // Handle X && Y in a condition. 38431a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner if (CondBOp->getOpcode() == BinaryOperator::LAnd) { 38531a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // If we have "1 && X", simplify the code. "0 && X" would have constant 38631a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // folded if the case was simple enough. 38731a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner if (ConstantFoldsToSimpleInteger(CondBOp->getLHS()) == 1) { 38831a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // br(1 && X) -> br(X). 38931a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner return EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock); 39031a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner } 3911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 39231a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // If we have "X && 1", simplify the code to use an uncond branch. 39331a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // "X && 0" would have been constant folded to 0. 39431a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner if (ConstantFoldsToSimpleInteger(CondBOp->getRHS()) == 1) { 39531a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // br(X && 1) -> br(X). 39631a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner return EmitBranchOnBoolExpr(CondBOp->getLHS(), TrueBlock, FalseBlock); 39731a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner } 3981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 39931a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // Emit the LHS as a conditional. If the LHS conditional is false, we 40031a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // want to jump to the FalseBlock. 4019615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *LHSTrue = createBasicBlock("land.lhs.true"); 40231a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner EmitBranchOnBoolExpr(CondBOp->getLHS(), LHSTrue, FalseBlock); 40331a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner EmitBlock(LHSTrue); 4041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 40508e9e453f40aff95a59bd67db49b8f050765e1f0Anders Carlsson // Any temporaries created here are conditional. 40672119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson BeginConditionalBranch(); 40731a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock); 40872119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson EndConditionalBranch(); 40908e9e453f40aff95a59bd67db49b8f050765e1f0Anders Carlsson 41031a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner return; 41131a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner } else if (CondBOp->getOpcode() == BinaryOperator::LOr) { 41231a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // If we have "0 || X", simplify the code. "1 || X" would have constant 41331a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // folded if the case was simple enough. 41431a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner if (ConstantFoldsToSimpleInteger(CondBOp->getLHS()) == -1) { 41531a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // br(0 || X) -> br(X). 41631a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner return EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock); 41731a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner } 4181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 41931a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // If we have "X || 0", simplify the code to use an uncond branch. 42031a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // "X || 1" would have been constant folded to 1. 42131a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner if (ConstantFoldsToSimpleInteger(CondBOp->getRHS()) == -1) { 42231a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // br(X || 0) -> br(X). 42331a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner return EmitBranchOnBoolExpr(CondBOp->getLHS(), TrueBlock, FalseBlock); 42431a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner } 4251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 42631a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // Emit the LHS as a conditional. If the LHS conditional is true, we 42731a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // want to jump to the TrueBlock. 4289615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *LHSFalse = createBasicBlock("lor.lhs.false"); 42931a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner EmitBranchOnBoolExpr(CondBOp->getLHS(), TrueBlock, LHSFalse); 43031a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner EmitBlock(LHSFalse); 4311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 43208e9e453f40aff95a59bd67db49b8f050765e1f0Anders Carlsson // Any temporaries created here are conditional. 43372119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson BeginConditionalBranch(); 43431a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner EmitBranchOnBoolExpr(CondBOp->getRHS(), TrueBlock, FalseBlock); 43572119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson EndConditionalBranch(); 43608e9e453f40aff95a59bd67db49b8f050765e1f0Anders Carlsson 43731a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner return; 43831a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner } 439552f4c45ba4f4a01f86d585edabd871a27829867Chris Lattner } 4401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 441552f4c45ba4f4a01f86d585edabd871a27829867Chris Lattner if (const UnaryOperator *CondUOp = dyn_cast<UnaryOperator>(Cond)) { 442552f4c45ba4f4a01f86d585edabd871a27829867Chris Lattner // br(!x, t, f) -> br(x, f, t) 443552f4c45ba4f4a01f86d585edabd871a27829867Chris Lattner if (CondUOp->getOpcode() == UnaryOperator::LNot) 444552f4c45ba4f4a01f86d585edabd871a27829867Chris Lattner return EmitBranchOnBoolExpr(CondUOp->getSubExpr(), FalseBlock, TrueBlock); 44531a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner } 4461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 44709b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar if (const ConditionalOperator *CondOp = dyn_cast<ConditionalOperator>(Cond)) { 44809b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar // Handle ?: operator. 44909b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar 45009b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar // Just ignore GNU ?: extension. 45109b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar if (CondOp->getLHS()) { 45209b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar // br(c ? x : y, t, f) -> br(c, br(x, t, f), br(y, t, f)) 45309b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar llvm::BasicBlock *LHSBlock = createBasicBlock("cond.true"); 45409b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar llvm::BasicBlock *RHSBlock = createBasicBlock("cond.false"); 45509b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar EmitBranchOnBoolExpr(CondOp->getCond(), LHSBlock, RHSBlock); 45609b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar EmitBlock(LHSBlock); 45709b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar EmitBranchOnBoolExpr(CondOp->getLHS(), TrueBlock, FalseBlock); 45809b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar EmitBlock(RHSBlock); 45909b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar EmitBranchOnBoolExpr(CondOp->getRHS(), TrueBlock, FalseBlock); 46009b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar return; 46109b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar } 46209b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar } 46309b14899039d828094c06ac25d60de62608e57b7Daniel Dunbar 46431a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // Emit the code with the fully general case. 46531a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner llvm::Value *CondV = EvaluateExprAsBool(Cond); 46631a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner Builder.CreateCondBr(CondV, TrueBlock, FalseBlock); 46731a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner} 46831a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner 469488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 470dc5e8268292046114ffe02e48773572a91a310f1Chris Lattner/// specified stmt yet. 47190df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenFunction::ErrorUnsupported(const Stmt *S, const char *Type, 47290df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 47390df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar CGM.ErrorUnsupported(S, Type, OmitOnError); 474dc5e8268292046114ffe02e48773572a91a310f1Chris Lattner} 475dc5e8268292046114ffe02e48773572a91a310f1Chris Lattner 4761884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlssonvoid 4771884eb0b5c55edda4893ddec45e7dbad79758782Anders CarlssonCodeGenFunction::EmitNullInitialization(llvm::Value *DestPtr, QualType Ty) { 4781884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson // If the type contains a pointer to data member we can't memset it to zero. 4791884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson // Instead, create a null constant and copy it to the destination. 4801884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson if (CGM.getTypes().ContainsPointerToDataMember(Ty)) { 4811884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson llvm::Constant *NullConstant = CGM.EmitNullConstant(Ty); 4821884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson 4831884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson llvm::GlobalVariable *NullVariable = 4841884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson new llvm::GlobalVariable(CGM.getModule(), NullConstant->getType(), 4851884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson /*isConstant=*/true, 4861884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson llvm::GlobalVariable::PrivateLinkage, 4871884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson NullConstant, llvm::Twine()); 4881884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson EmitAggregateCopy(DestPtr, NullVariable, Ty, /*isVolatile=*/false); 4891884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson return; 4901884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson } 4911884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson 4921884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson 4930d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson // Ignore empty classes in C++. 4940d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson if (getContext().getLangOptions().CPlusPlus) { 4950d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson if (const RecordType *RT = Ty->getAs<RecordType>()) { 4960d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson if (cast<CXXRecordDecl>(RT->getDecl())->isEmpty()) 4970d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson return; 4980d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson } 4990d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson } 5000d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson 5011884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson // Otherwise, just memset the whole thing to zero. This is legal 5021884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson // because in LLVM, all default initializers (other than the ones we just 5031884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson // handled above) are guaranteed to have a bit pattern of all zeros. 50436afd38fb749ab34c8341a1dc70366bca904eaa3Chris Lattner const llvm::Type *BP = llvm::Type::getInt8PtrTy(VMContext); 5053d8400d9a61aa4b63ff35e5cede405b32a41425eAnders Carlsson if (DestPtr->getType() != BP) 5063d8400d9a61aa4b63ff35e5cede405b32a41425eAnders Carlsson DestPtr = Builder.CreateBitCast(DestPtr, BP, "tmp"); 5073d8400d9a61aa4b63ff35e5cede405b32a41425eAnders Carlsson 5083d8400d9a61aa4b63ff35e5cede405b32a41425eAnders Carlsson // Get size and alignment info for this aggregate. 5093d8400d9a61aa4b63ff35e5cede405b32a41425eAnders Carlsson std::pair<uint64_t, unsigned> TypeInfo = getContext().getTypeInfo(Ty); 5103d8400d9a61aa4b63ff35e5cede405b32a41425eAnders Carlsson 51188207c9ca218486b93ae7df14e9764cd0c2c3383Chris Lattner // Don't bother emitting a zero-byte memset. 51288207c9ca218486b93ae7df14e9764cd0c2c3383Chris Lattner if (TypeInfo.first == 0) 51388207c9ca218486b93ae7df14e9764cd0c2c3383Chris Lattner return; 5141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5153d8400d9a61aa4b63ff35e5cede405b32a41425eAnders Carlsson // FIXME: Handle variable sized types. 5161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::Type *IntPtr = llvm::IntegerType::get(VMContext, 5170032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson LLVMPointerWidth); 5183d8400d9a61aa4b63ff35e5cede405b32a41425eAnders Carlsson 5193ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang Builder.CreateCall5(CGM.getMemSetFn(BP, IntPtr), DestPtr, 5200032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt8Ty(VMContext)), 5213d8400d9a61aa4b63ff35e5cede405b32a41425eAnders Carlsson // TypeInfo.first describes size in bits. 5224a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson llvm::ConstantInt::get(IntPtr, TypeInfo.first/8), 5231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 5243ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang TypeInfo.second/8), 5253ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang llvm::ConstantInt::get(llvm::Type::getInt1Ty(VMContext), 5263ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang 0)); 5273d8400d9a61aa4b63ff35e5cede405b32a41425eAnders Carlsson} 5283d8400d9a61aa4b63ff35e5cede405b32a41425eAnders Carlsson 529d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattnerllvm::BlockAddress *CodeGenFunction::GetAddrOfLabel(const LabelStmt *L) { 530d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner // Make sure that there is a block for the indirect goto. 531d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner if (IndirectBranch == 0) 532d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner GetIndirectGotoBlock(); 5333d00fdc82fd550ae4bfbb2e700a1fc85bbd6d6fdChris Lattner 534d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner llvm::BasicBlock *BB = getBasicBlockForLabel(L); 5353d00fdc82fd550ae4bfbb2e700a1fc85bbd6d6fdChris Lattner 536d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner // Make sure the indirect branch includes all of the address-taken blocks. 537d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner IndirectBranch->addDestination(BB); 538d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner return llvm::BlockAddress::get(CurFn, BB); 5393d00fdc82fd550ae4bfbb2e700a1fc85bbd6d6fdChris Lattner} 5401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5413d00fdc82fd550ae4bfbb2e700a1fc85bbd6d6fdChris Lattnerllvm::BasicBlock *CodeGenFunction::GetIndirectGotoBlock() { 542d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner // If we already made the indirect branch for indirect goto, return its block. 543d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner if (IndirectBranch) return IndirectBranch->getParent(); 5443d00fdc82fd550ae4bfbb2e700a1fc85bbd6d6fdChris Lattner 545d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner CGBuilderTy TmpBuilder(createBasicBlock("indirectgoto")); 5463d00fdc82fd550ae4bfbb2e700a1fc85bbd6d6fdChris Lattner 547d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner const llvm::Type *Int8PtrTy = llvm::Type::getInt8PtrTy(VMContext); 54885e74acfcfb0c835a2e6c1adab314e997917039aChris Lattner 5493d00fdc82fd550ae4bfbb2e700a1fc85bbd6d6fdChris Lattner // Create the PHI node that indirect gotos will add entries to. 550d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner llvm::Value *DestVal = TmpBuilder.CreatePHI(Int8PtrTy, "indirect.goto.dest"); 5513d00fdc82fd550ae4bfbb2e700a1fc85bbd6d6fdChris Lattner 552d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner // Create the indirect branch instruction. 553d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner IndirectBranch = TmpBuilder.CreateIndirectBr(DestVal); 554d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner return IndirectBranch->getParent(); 5550ffb125996336fc7602b162c0a9e392f1a93060fDaniel Dunbar} 556ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 557d286f05f1234bac289173f0eed88d7ecbaea0099Daniel Dunbarllvm::Value *CodeGenFunction::GetVLASize(const VariableArrayType *VAT) { 558bbed6b964414145b29e7b60b3e538093734ea3f8Eli Friedman llvm::Value *&SizeEntry = VLASizeMap[VAT->getSizeExpr()]; 5591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 560f666b7780d04186521adcaedb0e15dfa4d5e6933Anders Carlsson assert(SizeEntry && "Did not emit size for type"); 561f666b7780d04186521adcaedb0e15dfa4d5e6933Anders Carlsson return SizeEntry; 562f666b7780d04186521adcaedb0e15dfa4d5e6933Anders Carlsson} 563dcc90d87e6430c643b4311ae5b0089535bca41f7Anders Carlsson 564d286f05f1234bac289173f0eed88d7ecbaea0099Daniel Dunbarllvm::Value *CodeGenFunction::EmitVLASize(QualType Ty) { 56560d35413662ebdcd1d31e34a8a7c665eb6977f1eAnders Carlsson assert(Ty->isVariablyModifiedType() && 56660d35413662ebdcd1d31e34a8a7c665eb6977f1eAnders Carlsson "Must pass variably modified type to EmitVLASizes!"); 5671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 568d286f05f1234bac289173f0eed88d7ecbaea0099Daniel Dunbar EnsureInsertPoint(); 5691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 57060d35413662ebdcd1d31e34a8a7c665eb6977f1eAnders Carlsson if (const VariableArrayType *VAT = getContext().getAsVariableArrayType(Ty)) { 571bbed6b964414145b29e7b60b3e538093734ea3f8Eli Friedman llvm::Value *&SizeEntry = VLASizeMap[VAT->getSizeExpr()]; 5721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 573fcdbb93749ed69aa9022437052c390522355ec3dAnders Carlsson if (!SizeEntry) { 57496f214776c0f69069fee4d67557c8c7f416009a8Anders Carlsson const llvm::Type *SizeTy = ConvertType(getContext().getSizeType()); 5751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 576ec18ddd33d5dc2cba5f64fa903bac7a83dc1e01eChris Lattner // Get the element size; 577ec18ddd33d5dc2cba5f64fa903bac7a83dc1e01eChris Lattner QualType ElemTy = VAT->getElementType(); 578ec18ddd33d5dc2cba5f64fa903bac7a83dc1e01eChris Lattner llvm::Value *ElemSize; 579fcdbb93749ed69aa9022437052c390522355ec3dAnders Carlsson if (ElemTy->isVariableArrayType()) 580fcdbb93749ed69aa9022437052c390522355ec3dAnders Carlsson ElemSize = EmitVLASize(ElemTy); 581ec18ddd33d5dc2cba5f64fa903bac7a83dc1e01eChris Lattner else 5824a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson ElemSize = llvm::ConstantInt::get(SizeTy, 583199c3d6cd16aebbb9c7f0d42af9d922c9628bf70Ken Dyck getContext().getTypeSizeInChars(ElemTy).getQuantity()); 5841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 585fcdbb93749ed69aa9022437052c390522355ec3dAnders Carlsson llvm::Value *NumElements = EmitScalarExpr(VAT->getSizeExpr()); 58696f214776c0f69069fee4d67557c8c7f416009a8Anders Carlsson NumElements = Builder.CreateIntCast(NumElements, SizeTy, false, "tmp"); 5871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 588fcdbb93749ed69aa9022437052c390522355ec3dAnders Carlsson SizeEntry = Builder.CreateMul(ElemSize, NumElements); 589fcdbb93749ed69aa9022437052c390522355ec3dAnders Carlsson } 5901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 59160d35413662ebdcd1d31e34a8a7c665eb6977f1eAnders Carlsson return SizeEntry; 592dcc90d87e6430c643b4311ae5b0089535bca41f7Anders Carlsson } 5931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 594ec18ddd33d5dc2cba5f64fa903bac7a83dc1e01eChris Lattner if (const ArrayType *AT = dyn_cast<ArrayType>(Ty)) { 595ec18ddd33d5dc2cba5f64fa903bac7a83dc1e01eChris Lattner EmitVLASize(AT->getElementType()); 596ec18ddd33d5dc2cba5f64fa903bac7a83dc1e01eChris Lattner return 0; 5971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 5981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 599ec18ddd33d5dc2cba5f64fa903bac7a83dc1e01eChris Lattner const PointerType *PT = Ty->getAs<PointerType>(); 600ec18ddd33d5dc2cba5f64fa903bac7a83dc1e01eChris Lattner assert(PT && "unknown VM type!"); 601ec18ddd33d5dc2cba5f64fa903bac7a83dc1e01eChris Lattner EmitVLASize(PT->getPointeeType()); 60260d35413662ebdcd1d31e34a8a7c665eb6977f1eAnders Carlsson return 0; 603dcc90d87e6430c643b4311ae5b0089535bca41f7Anders Carlsson} 6044fd0aa5803357d8c72eeac2cae15e12649ea08feEli Friedman 6054fd0aa5803357d8c72eeac2cae15e12649ea08feEli Friedmanllvm::Value* CodeGenFunction::EmitVAListRef(const Expr* E) { 6064fd0aa5803357d8c72eeac2cae15e12649ea08feEli Friedman if (CGM.getContext().getBuiltinVaListType()->isArrayType()) { 6074fd0aa5803357d8c72eeac2cae15e12649ea08feEli Friedman return EmitScalarExpr(E); 6084fd0aa5803357d8c72eeac2cae15e12649ea08feEli Friedman } 6094fd0aa5803357d8c72eeac2cae15e12649ea08feEli Friedman return EmitLValue(E).getAddress(); 6104fd0aa5803357d8c72eeac2cae15e12649ea08feEli Friedman} 6116ccc47698d0311ddabf32fa0f6db8e4f09ac96f8Anders Carlsson 6127799621ad7d16f3c6a1aeda024312d63ecd77777Fariborz Jahanianvoid CodeGenFunction::PushCleanupBlock(llvm::BasicBlock *CleanupEntryBlock, 61399533834ba8f3658559f334e68a518ebb6388ceaMike Stump llvm::BasicBlock *CleanupExitBlock, 614d88ea5687968640ada2bc5a10211cbeb68a671ecMike Stump llvm::BasicBlock *PreviousInvokeDest, 61599533834ba8f3658559f334e68a518ebb6388ceaMike Stump bool EHOnly) { 61699533834ba8f3658559f334e68a518ebb6388ceaMike Stump CleanupEntries.push_back(CleanupEntry(CleanupEntryBlock, CleanupExitBlock, 617d88ea5687968640ada2bc5a10211cbeb68a671ecMike Stump PreviousInvokeDest, EHOnly)); 6186ccc47698d0311ddabf32fa0f6db8e4f09ac96f8Anders Carlsson} 619c71c845fe77ee1f891d60232ec320912d88557eeAnders Carlsson 6201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenFunction::EmitCleanupBlocks(size_t OldCleanupStackSize) { 6211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(CleanupEntries.size() >= OldCleanupStackSize && 622c71c845fe77ee1f891d60232ec320912d88557eeAnders Carlsson "Cleanup stack mismatch!"); 6231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 624c71c845fe77ee1f891d60232ec320912d88557eeAnders Carlsson while (CleanupEntries.size() > OldCleanupStackSize) 625c71c845fe77ee1f891d60232ec320912d88557eeAnders Carlsson EmitCleanupBlock(); 626c71c845fe77ee1f891d60232ec320912d88557eeAnders Carlsson} 627c71c845fe77ee1f891d60232ec320912d88557eeAnders Carlsson 6281eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpCodeGenFunction::CleanupBlockInfo CodeGenFunction::PopCleanupBlock() { 629bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson CleanupEntry &CE = CleanupEntries.back(); 6301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6317799621ad7d16f3c6a1aeda024312d63ecd77777Fariborz Jahanian llvm::BasicBlock *CleanupEntryBlock = CE.CleanupEntryBlock; 6321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 633bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson std::vector<llvm::BasicBlock *> Blocks; 634bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson std::swap(Blocks, CE.Blocks); 6351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 636bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson std::vector<llvm::BranchInst *> BranchFixups; 637bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson std::swap(BranchFixups, CE.BranchFixups); 6381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 63999533834ba8f3658559f334e68a518ebb6388ceaMike Stump bool EHOnly = CE.EHOnly; 64099533834ba8f3658559f334e68a518ebb6388ceaMike Stump 641d88ea5687968640ada2bc5a10211cbeb68a671ecMike Stump setInvokeDest(CE.PreviousInvokeDest); 642d88ea5687968640ada2bc5a10211cbeb68a671ecMike Stump 643bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson CleanupEntries.pop_back(); 644bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson 645ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson // Check if any branch fixups pointed to the scope we just popped. If so, 646ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson // we can remove them. 647ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson for (size_t i = 0, e = BranchFixups.size(); i != e; ++i) { 648ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson llvm::BasicBlock *Dest = BranchFixups[i]->getSuccessor(0); 649ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson BlockScopeMap::iterator I = BlockScopes.find(Dest); 6501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 651ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson if (I == BlockScopes.end()) 652ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson continue; 6531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 654ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson assert(I->second <= CleanupEntries.size() && "Invalid branch fixup!"); 6551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 656ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson if (I->second == CleanupEntries.size()) { 657ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson // We don't need to do this branch fixup. 658ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson BranchFixups[i] = BranchFixups.back(); 659ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson BranchFixups.pop_back(); 660ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson i--; 661ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson e--; 662ad9d00e371f4f4e63a540f4e4c501797db2a43deAnders Carlsson continue; 6631093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson } 6641093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson } 6651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6667799621ad7d16f3c6a1aeda024312d63ecd77777Fariborz Jahanian llvm::BasicBlock *SwitchBlock = CE.CleanupExitBlock; 667bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson llvm::BasicBlock *EndBlock = 0; 6681093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson if (!BranchFixups.empty()) { 6697799621ad7d16f3c6a1aeda024312d63ecd77777Fariborz Jahanian if (!SwitchBlock) 6707799621ad7d16f3c6a1aeda024312d63ecd77777Fariborz Jahanian SwitchBlock = createBasicBlock("cleanup.switch"); 671bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson EndBlock = createBasicBlock("cleanup.end"); 6721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 673bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson llvm::BasicBlock *CurBB = Builder.GetInsertBlock(); 6741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 675bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson Builder.SetInsertPoint(SwitchBlock); 676bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson 67799533834ba8f3658559f334e68a518ebb6388ceaMike Stump llvm::Value *DestCodePtr 67899533834ba8f3658559f334e68a518ebb6388ceaMike Stump = CreateTempAlloca(llvm::Type::getInt32Ty(VMContext), 67999533834ba8f3658559f334e68a518ebb6388ceaMike Stump "cleanup.dst"); 6801093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson llvm::Value *DestCode = Builder.CreateLoad(DestCodePtr, "tmp"); 6811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6821093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson // Create a switch instruction to determine where to jump next. 6831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::SwitchInst *SI = Builder.CreateSwitch(DestCode, EndBlock, 6841093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson BranchFixups.size()); 685bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson 68646831a93e1805ddaebd68f37cdb5496a86b44cf0Anders Carlsson // Restore the current basic block (if any) 6870ae7b2b2f964bd6145d65ef52dc2a28025b2bd06Anders Carlsson if (CurBB) { 68846831a93e1805ddaebd68f37cdb5496a86b44cf0Anders Carlsson Builder.SetInsertPoint(CurBB); 6891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6900ae7b2b2f964bd6145d65ef52dc2a28025b2bd06Anders Carlsson // If we had a current basic block, we also need to emit an instruction 6910ae7b2b2f964bd6145d65ef52dc2a28025b2bd06Anders Carlsson // to initialize the cleanup destination. 6920032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson Builder.CreateStore(llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)), 6930ae7b2b2f964bd6145d65ef52dc2a28025b2bd06Anders Carlsson DestCodePtr); 6940ae7b2b2f964bd6145d65ef52dc2a28025b2bd06Anders Carlsson } else 69546831a93e1805ddaebd68f37cdb5496a86b44cf0Anders Carlsson Builder.ClearInsertionPoint(); 696bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson 6971093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson for (size_t i = 0, e = BranchFixups.size(); i != e; ++i) { 6981093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson llvm::BranchInst *BI = BranchFixups[i]; 6991093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson llvm::BasicBlock *Dest = BI->getSuccessor(0); 7001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7011093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson // Fixup the branch instruction to point to the cleanup block. 7027799621ad7d16f3c6a1aeda024312d63ecd77777Fariborz Jahanian BI->setSuccessor(0, CleanupEntryBlock); 7031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7041093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson if (CleanupEntries.empty()) { 705cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson llvm::ConstantInt *ID; 7061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 707cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson // Check if we already have a destination for this block. 708cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson if (Dest == SI->getDefaultDest()) 7090032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson ID = llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 0); 710cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson else { 711cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson ID = SI->findCaseDest(Dest); 712cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson if (!ID) { 713cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson // No code found, get a new unique one by using the number of 714cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson // switch successors. 7151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ID = llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 716cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson SI->getNumSuccessors()); 717cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson SI->addCase(ID, Dest); 718cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson } 719cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson } 7201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 721cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson // Store the jump destination before the branch instruction. 722cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson new llvm::StoreInst(ID, DestCodePtr, BI); 7231093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson } else { 7241093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson // We need to jump through another cleanup block. Create a pad block 72599533834ba8f3658559f334e68a518ebb6388ceaMike Stump // with a branch instruction that jumps to the final destination and add 72699533834ba8f3658559f334e68a518ebb6388ceaMike Stump // it as a branch fixup to the current cleanup scope. 7271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7281093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson // Create the pad block. 7291093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson llvm::BasicBlock *CleanupPad = createBasicBlock("cleanup.pad", CurFn); 730cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson 731cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson // Create a unique case ID. 73299533834ba8f3658559f334e68a518ebb6388ceaMike Stump llvm::ConstantInt *ID 73399533834ba8f3658559f334e68a518ebb6388ceaMike Stump = llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 73499533834ba8f3658559f334e68a518ebb6388ceaMike Stump SI->getNumSuccessors()); 735cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson 736cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson // Store the jump destination before the branch instruction. 737cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson new llvm::StoreInst(ID, DestCodePtr, BI); 738cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson 7391093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson // Add it as the destination. 740cc8992021caf316a282116d509d2a4fb54349341Anders Carlsson SI->addCase(ID, CleanupPad); 7411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7421093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson // Create the branch to the final destination. 7431093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson llvm::BranchInst *BI = llvm::BranchInst::Create(Dest); 7441093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson CleanupPad->getInstList().push_back(BI); 7451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7461093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson // And add it as a branch fixup. 7471093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson CleanupEntries.back().BranchFixups.push_back(BI); 7481093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson } 7491093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson } 7501093c2c40a7c262d206d724e912b32cbad2d4e14Anders Carlsson } 7511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 752bd6fa3d032acd7eafc6c10827c41103df45beab7Anders Carlsson // Remove all blocks from the block scope map. 753bd6fa3d032acd7eafc6c10827c41103df45beab7Anders Carlsson for (size_t i = 0, e = Blocks.size(); i != e; ++i) { 754bd6fa3d032acd7eafc6c10827c41103df45beab7Anders Carlsson assert(BlockScopes.count(Blocks[i]) && 755bd6fa3d032acd7eafc6c10827c41103df45beab7Anders Carlsson "Did not find block in scope map!"); 7561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 757bd6fa3d032acd7eafc6c10827c41103df45beab7Anders Carlsson BlockScopes.erase(Blocks[i]); 758bd6fa3d032acd7eafc6c10827c41103df45beab7Anders Carlsson } 7591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 76099533834ba8f3658559f334e68a518ebb6388ceaMike Stump return CleanupBlockInfo(CleanupEntryBlock, SwitchBlock, EndBlock, EHOnly); 761d66a9f9019c00d889990c947e16a8f019aa2c1f8Anders Carlsson} 762d66a9f9019c00d889990c947e16a8f019aa2c1f8Anders Carlsson 7631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenFunction::EmitCleanupBlock() { 764bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson CleanupBlockInfo Info = PopCleanupBlock(); 7651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 76699533834ba8f3658559f334e68a518ebb6388ceaMike Stump if (Info.EHOnly) { 76799533834ba8f3658559f334e68a518ebb6388ceaMike Stump // FIXME: Add this to the exceptional edge 76899533834ba8f3658559f334e68a518ebb6388ceaMike Stump if (Info.CleanupBlock->getNumUses() == 0) 76999533834ba8f3658559f334e68a518ebb6388ceaMike Stump delete Info.CleanupBlock; 77099533834ba8f3658559f334e68a518ebb6388ceaMike Stump return; 77199533834ba8f3658559f334e68a518ebb6388ceaMike Stump } 77299533834ba8f3658559f334e68a518ebb6388ceaMike Stump 773cd9199eb3dd1a665ea642f3918020a53e5ecb673Devang Patel // Scrub debug location info. 774cd9199eb3dd1a665ea642f3918020a53e5ecb673Devang Patel for (llvm::BasicBlock::iterator LBI = Info.CleanupBlock->begin(), 775cd9199eb3dd1a665ea642f3918020a53e5ecb673Devang Patel LBE = Info.CleanupBlock->end(); LBI != LBE; ++LBI) 776cd9199eb3dd1a665ea642f3918020a53e5ecb673Devang Patel Builder.SetInstDebugLocation(LBI); 777cd9199eb3dd1a665ea642f3918020a53e5ecb673Devang Patel 778eb6437a9b23b3d98a4590ba5557111e14eba2edfAnders Carlsson llvm::BasicBlock *CurBB = Builder.GetInsertBlock(); 7791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (CurBB && !CurBB->getTerminator() && 780eb6437a9b23b3d98a4590ba5557111e14eba2edfAnders Carlsson Info.CleanupBlock->getNumUses() == 0) { 781eb6437a9b23b3d98a4590ba5557111e14eba2edfAnders Carlsson CurBB->getInstList().splice(CurBB->end(), Info.CleanupBlock->getInstList()); 782eb6437a9b23b3d98a4590ba5557111e14eba2edfAnders Carlsson delete Info.CleanupBlock; 7831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 784eb6437a9b23b3d98a4590ba5557111e14eba2edfAnders Carlsson EmitBlock(Info.CleanupBlock); 7851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 786bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson if (Info.SwitchBlock) 787bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson EmitBlock(Info.SwitchBlock); 788bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson if (Info.EndBlock) 789bb66f9f2e454135b86462d121629275b6ac38e96Anders Carlsson EmitBlock(Info.EndBlock); 790d66a9f9019c00d889990c947e16a8f019aa2c1f8Anders Carlsson} 791d66a9f9019c00d889990c947e16a8f019aa2c1f8Anders Carlsson 7921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenFunction::AddBranchFixup(llvm::BranchInst *BI) { 7931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!CleanupEntries.empty() && 79487eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson "Trying to add branch fixup without cleanup block!"); 7951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 796f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: We could be more clever here and check if there's already a branch 797f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // fixup for this destination and recycle it. 79887eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson CleanupEntries.back().BranchFixups.push_back(BI); 79987eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson} 80087eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson 8011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenFunction::EmitBranchThroughCleanup(llvm::BasicBlock *Dest) { 80246831a93e1805ddaebd68f37cdb5496a86b44cf0Anders Carlsson if (!HaveInsertPoint()) 80346831a93e1805ddaebd68f37cdb5496a86b44cf0Anders Carlsson return; 8041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 80587eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson llvm::BranchInst* BI = Builder.CreateBr(Dest); 8061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 80746831a93e1805ddaebd68f37cdb5496a86b44cf0Anders Carlsson Builder.ClearInsertionPoint(); 8081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 80987eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson // The stack is empty, no need to do any cleanup. 81087eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson if (CleanupEntries.empty()) 81187eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson return; 8121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 81387eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson if (!Dest->getParent()) { 81487eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson // We are trying to branch to a block that hasn't been inserted yet. 81587eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson AddBranchFixup(BI); 81687eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson return; 81787eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson } 8181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 81987eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson BlockScopeMap::iterator I = BlockScopes.find(Dest); 82087eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson if (I == BlockScopes.end()) { 82187eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson // We are trying to jump to a block that is outside of any cleanup scope. 82287eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson AddBranchFixup(BI); 82387eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson return; 82487eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson } 8251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 82687eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson assert(I->second < CleanupEntries.size() && 82787eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson "Trying to branch into cleanup region"); 8281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 82987eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson if (I->second == CleanupEntries.size() - 1) { 83087eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson // We have a branch to a block in the same scope. 83187eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson return; 83287eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson } 8331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 83487eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson AddBranchFixup(BI); 83587eaf17cc88516277e4389dfa15df93ecfdce559Anders Carlsson} 836