Index: lib/CodeGen/WinEHPrepare.cpp =================================================================== --- lib/CodeGen/WinEHPrepare.cpp +++ lib/CodeGen/WinEHPrepare.cpp @@ -20,6 +20,7 @@ #include "llvm/ADT/SmallSet.h" #include "llvm/ADT/TinyPtrVector.h" #include "llvm/Analysis/LibCallSemantics.h" +#include "llvm/IR/Dominators.h" #include "llvm/IR/Function.h" #include "llvm/IR/IRBuilder.h" #include "llvm/IR/Instructions.h" @@ -33,6 +34,7 @@ #include "llvm/Transforms/Utils/BasicBlockUtils.h" #include "llvm/Transforms/Utils/Cloning.h" #include "llvm/Transforms/Utils/Local.h" +#include "llvm/Transforms/Utils/PromoteMemToReg.h" #include using namespace llvm; @@ -66,7 +68,7 @@ public: static char ID; // Pass identification, replacement for typeid. WinEHPrepare(const TargetMachine *TM = nullptr) - : FunctionPass(ID) {} + : FunctionPass(ID), DT(nullptr) {} bool runOnFunction(Function &Fn) override; @@ -81,6 +83,7 @@ private: bool prepareExceptionHandlers(Function &F, SmallVectorImpl &LPads); + void promoteLandingPadValues(LandingPadInst *LPad); bool outlineHandler(ActionHandler *Action, Function *SrcFn, LandingPadInst *LPad, BasicBlock *StartBB, FrameVarInfoMap &VarInfo); @@ -93,10 +96,11 @@ void processSEHCatchHandler(CatchHandler *Handler, BasicBlock *StartBB); // All fields are reset by runOnFunction. + DominatorTree *DT; EHPersonality Personality; CatchHandlerMapTy CatchHandlerMap; CleanupHandlerMapTy CleanupHandlerMap; - DenseMap LPadMaps; + DenseMap LPadMaps; }; class WinEHFrameVariableMaterializer : public ValueMaterializer { @@ -119,37 +123,18 @@ bool isInitialized() { return OriginLPad != nullptr; } - bool mapIfEHPtrLoad(const LoadInst *Load) { - return mapIfEHLoad(Load, EHPtrStores, EHPtrStoreAddrs); - } - bool mapIfSelectorLoad(const LoadInst *Load) { - return mapIfEHLoad(Load, SelectorStores, SelectorStoreAddrs); - } - bool isOriginLandingPadBlock(const BasicBlock *BB) const; bool isLandingPadSpecificInst(const Instruction *Inst) const; - void remapSelector(ValueToValueMapTy &VMap, Value *MappedValue) const; + void remapEHValues(ValueToValueMapTy &VMap, Value *EHPtrValue, + Value *SelectorValue) const; private: - bool mapIfEHLoad(const LoadInst *Load, - SmallVectorImpl &Stores, - SmallVectorImpl &StoreAddrs); - const LandingPadInst *OriginLPad; // We will normally only see one of each of these instructions, but // if more than one occurs for some reason we can handle that. TinyPtrVector ExtractedEHPtrs; TinyPtrVector ExtractedSelectors; - - // In optimized code, there will typically be at most one instance of - // each of the following, but in unoptimized IR it is not uncommon - // for the values to be stored, loaded and then stored again. In that - // case we will create a second entry for each store and store address. - SmallVector EHPtrStores; - SmallVector SelectorStores; - SmallVector EHPtrStoreAddrs; - SmallVector SelectorStoreAddrs; }; class WinEHCloningDirectorBase : public CloningDirector { @@ -361,6 +346,8 @@ if (!isMSVCEHPersonality(Personality)) return false; + DT = &getAnalysis().getDomTree(); + if (isAsynchronousEHPersonality(Personality) && !SEHPrepare) { // Replace all resume instructions with unreachable. // FIXME: Remove this once the backend can handle the prepared IR. @@ -380,7 +367,9 @@ return false; } -void WinEHPrepare::getAnalysisUsage(AnalysisUsage &AU) const {} +void WinEHPrepare::getAnalysisUsage(AnalysisUsage &AU) const { + AU.addRequired(); +} bool WinEHPrepare::prepareExceptionHandlers( Function &F, SmallVectorImpl &LPads) { @@ -423,6 +412,10 @@ if (LPadHasActionList) continue; + // If either of the values in the aggregate returned by the landing pad is + // extracted and stored to memory, promote the stored value to a register. + promoteLandingPadValues(LPad); + LandingPadActions Actions; mapLandingPadBlocks(LPad, Actions); @@ -624,6 +617,38 @@ return HandlersOutlined; } +void WinEHPrepare::promoteLandingPadValues(LandingPadInst *LPad) { + // If the return values of the landing pad instruction are extracted and + // stored to memory, we want to promote the store locations to reg values. + SmallVector EHAllocas; + + // The landingpad instruction returns an aggregate value. Typically, its + // value will be passed to a pair of extract value instructions and the + // results of those extracts are often passed to store instructions. + // In unoptimized code the stored value will often be loaded and then stored + // again. + for (auto *U : LPad->users()) { + ExtractValueInst *Extract = dyn_cast(U); + if (!Extract) + continue; + + for (auto *EU : Extract->users()) { + if (auto *Store = dyn_cast(EU)) { + auto *AV = cast(Store->getPointerOperand()); + EHAllocas.push_back(AV); + } + } + } + + // We can't do this without a dominator tree. + assert(DT); + + if (!EHAllocas.empty()) { + PromoteMemToReg(EHAllocas, *DT); + EHAllocas.clear(); + } +} + // This function examines a block to determine whether the block ends with a // conditional branch to a catch handler based on a selector comparison. // This function is used both by the WinEHPrepare::findSelectorComparison() and @@ -708,9 +733,12 @@ Constant *Sel = CatchAction->getSelector(); Director.reset(new WinEHCatchDirector(Handler, Sel, VarInfo, LPadMap)); - LPadMap.remapSelector(VMap, ConstantInt::get(Type::getInt32Ty(Context), 1)); + LPadMap.remapEHValues(VMap, UndefValue::get(Int8PtrType), + ConstantInt::get(Type::getInt32Ty(Context), 1)); } else { Director.reset(new WinEHCleanupDirector(Handler, VarInfo, LPadMap)); + LPadMap.remapEHValues(VMap, UndefValue::get(Int8PtrType), + UndefValue::get(Type::getInt32Ty(Context))); } SmallVector Returns; @@ -798,9 +826,8 @@ // The landingpad instruction returns an aggregate value. Typically, its // value will be passed to a pair of extract value instructions and the - // results of those extracts are often passed to store instructions. - // In unoptimized code the stored value will often be loaded and then stored - // again. + // results of those extracts will have been promoted to reg values before + // this routine is called. for (auto *U : LPad->users()) { const ExtractValueInst *Extract = dyn_cast(U); if (!Extract) @@ -811,33 +838,10 @@ assert((Idx == 0 || Idx == 1) && "Unexpected operation: extracting an unknown landing pad element"); if (Idx == 0) { - // Element 0 doesn't directly corresponds to anything in the WinEH - // scheme. - // It will be stored to a memory location, then later loaded and finally - // the loaded value will be used as the argument to an - // llvm.eh.begincatch - // call. We're tracking it here so that we can skip the store and load. ExtractedEHPtrs.push_back(Extract); } else if (Idx == 1) { - // Element 1 corresponds to the filter selector. We'll map it to 1 for - // matching purposes, but it will also probably be stored to memory and - // reloaded, so we need to track the instuction so that we can map the - // loaded value too. ExtractedSelectors.push_back(Extract); } - - // Look for stores of the extracted values. - for (auto *EU : Extract->users()) { - if (auto *Store = dyn_cast(EU)) { - if (Idx == 1) { - SelectorStores.push_back(Store); - SelectorStoreAddrs.push_back(Store->getPointerOperand()); - } else { - EHPtrStores.push_back(Store); - EHPtrStoreAddrs.push_back(Store->getPointerOperand()); - } - } - } } } @@ -856,47 +860,16 @@ if (Inst == Extract) return true; } - for (auto *Store : EHPtrStores) { - if (Inst == Store) - return true; - } - for (auto *Store : SelectorStores) { - if (Inst == Store) - return true; - } - return false; } -void LandingPadMap::remapSelector(ValueToValueMapTy &VMap, - Value *MappedValue) const { - // Remap all selector extract instructions to the specified value. +void LandingPadMap::remapEHValues(ValueToValueMapTy &VMap, Value *EHPtrValue, + Value *SelectorValue) const { + // Remap all landing pad extract instructions to the specified values. + for (auto *Extract : ExtractedEHPtrs) + VMap[Extract] = EHPtrValue; for (auto *Extract : ExtractedSelectors) - VMap[Extract] = MappedValue; -} - -bool LandingPadMap::mapIfEHLoad(const LoadInst *Load, - SmallVectorImpl &Stores, - SmallVectorImpl &StoreAddrs) { - // This makes the assumption that a store we've previously seen dominates - // this load instruction. That might seem like a rather huge assumption, - // but given the way that landingpads are constructed its fairly safe. - // FIXME: Add debug/assert code that verifies this. - const Value *LoadAddr = Load->getPointerOperand(); - for (auto *StoreAddr : StoreAddrs) { - if (LoadAddr == StoreAddr) { - // Handle the common debug scenario where this loaded value is stored - // to a different location. - for (auto *U : Load->users()) { - if (auto *Store = dyn_cast(U)) { - Stores.push_back(Store); - StoreAddrs.push_back(Store->getPointerOperand()); - } - } - return true; - } - } - return false; + VMap[Extract] = SelectorValue; } CloningDirector::CloningAction WinEHCloningDirectorBase::handleInstruction( @@ -906,25 +879,6 @@ if (LPadMap.isLandingPadSpecificInst(Inst)) return CloningDirector::SkipInstruction; - if (auto *Load = dyn_cast(Inst)) { - // Look for loads of (previously suppressed) landingpad values. - // The EHPtr load can be mapped to an undef value as it should only be used - // as an argument to llvm.eh.begincatch, but the selector value needs to be - // mapped to a constant value of 1. This value will be used to simplify the - // branching to always flow to the current handler. - if (LPadMap.mapIfSelectorLoad(Load)) { - VMap[Inst] = ConstantInt::get(SelectorIDType, 1); - return CloningDirector::SkipInstruction; - } - if (LPadMap.mapIfEHPtrLoad(Load)) { - VMap[Inst] = UndefValue::get(Int8PtrType); - return CloningDirector::SkipInstruction; - } - - // Any other loads just get cloned. - return CloningDirector::CloneInstruction; - } - // Nested landing pads will be cloned as stubs, with just the // landingpad instruction and an unreachable instruction. When // all landingpads have been outlined, we'll replace this with the @@ -994,20 +948,24 @@ if (ParentBB->isLandingPad() && !LPadMap.isOriginLandingPadBlock(ParentBB)) return CloningDirector::SkipInstruction; - // If an end catch occurs anywhere else the next instruction should be an - // unconditional branch instruction that we want to replace with a return - // to the the address of the branch target. - const BasicBlock *EndCatchBB = IntrinCall->getParent(); - const TerminatorInst *Terminator = EndCatchBB->getTerminator(); - const BranchInst *Branch = dyn_cast(Terminator); - assert(Branch && Branch->isUnconditional()); - assert(std::next(BasicBlock::const_iterator(IntrinCall)) == - BasicBlock::const_iterator(Branch)); - - BasicBlock *ContinueLabel = Branch->getSuccessor(0); - ReturnInst::Create(NewBB->getContext(), BlockAddress::get(ContinueLabel), - NewBB); - ReturnTargets.push_back(ContinueLabel); + // If an end catch occurs anywhere else we want to terminate the handler + // with a return to the code that follows the endcatch call. If the + // next instruction is not an unconditional branch, we need to split the + // block to provide a clear target for the return instruction. + BasicBlock *ContinueBB; + auto Next = std::next(BasicBlock::const_iterator(IntrinCall)); + const BranchInst *Branch = dyn_cast(Next); + if (!Branch || !Branch->isUnconditional()) { + // We're interrupting the cloning process at this location, so the + // const_cast we're doing here will not cause a problem. + ContinueBB = SplitBlock(const_cast(ParentBB), + const_cast(cast(Next))); + } else { + ContinueBB = Branch->getSuccessor(0); + } + + ReturnInst::Create(NewBB->getContext(), BlockAddress::get(ContinueBB), NewBB); + ReturnTargets.push_back(ContinueBB); // We just added a terminator to the cloned block. // Tell the caller to stop processing the current basic block so that @@ -1406,10 +1364,8 @@ } // Look for the bare resume pattern: - // %exn2 = load i8** %exn.slot - // %sel2 = load i32* %ehselector.slot - // %lpad.val1 = insertvalue { i8*, i32 } undef, i8* %exn2, 0 - // %lpad.val2 = insertvalue { i8*, i32 } %lpad.val1, i32 %sel2, 1 + // %lpad.val1 = insertvalue { i8*, i32 } undef, i8* %exn, 0 + // %lpad.val2 = insertvalue { i8*, i32 } %lpad.val1, i32 %sel, 1 // resume { i8*, i32 } %lpad.val2 if (auto *Resume = dyn_cast(Terminator)) { InsertValueInst *Insert1 = nullptr; @@ -1443,62 +1399,73 @@ } BranchInst *Branch = dyn_cast(Terminator); - if (Branch) { - if (Branch->isConditional()) { - // Look for the selector dispatch. - // %sel = load i32* %ehselector.slot - // %2 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIf to i8*)) - // %matches = icmp eq i32 %sel12, %2 - // br i1 %matches, label %catch14, label %eh.resume - CmpInst *Compare = dyn_cast(Branch->getCondition()); - if (!Compare || !Compare->isEquality()) - return createCleanupHandler(CleanupHandlerMap, BB); - for (BasicBlock::iterator II = BB->getFirstNonPHIOrDbg(), - IE = BB->end(); - II != IE; ++II) { - Instruction *Inst = II; - if (LPadMap && LPadMap->isLandingPadSpecificInst(Inst)) - continue; - if (Inst == Compare || Inst == Branch) - continue; - if (!Inst->hasOneUse() || (Inst->user_back() != Compare)) - return createCleanupHandler(CleanupHandlerMap, BB); - if (match(Inst, m_Intrinsic())) - continue; - if (!isa(Inst)) - return createCleanupHandler(CleanupHandlerMap, BB); - } - // The selector dispatch block should always terminate our search. - assert(BB == EndBB); - return nullptr; - } else { - // Look for empty blocks with unconditional branches. - for (BasicBlock::iterator II = BB->getFirstNonPHIOrDbg(), - IE = BB->end(); - II != IE; ++II) { - Instruction *Inst = II; - if (LPadMap && LPadMap->isLandingPadSpecificInst(Inst)) - continue; - if (Inst == Branch) - continue; - // This can happen with a catch-all handler. - if (match(Inst, m_Intrinsic())) - return nullptr; - if (match(Inst, m_Intrinsic())) - continue; - // Anything else makes this interesting cleanup code. - return createCleanupHandler(CleanupHandlerMap, BB); + if (Branch && Branch->isConditional()) { + // Look for the selector dispatch. + // %2 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIf to i8*)) + // %matches = icmp eq i32 %sel, %2 + // br i1 %matches, label %catch14, label %eh.resume + CmpInst *Compare = dyn_cast(Branch->getCondition()); + if (!Compare || !Compare->isEquality()) + return createCleanupHandler(CleanupHandlerMap, BB); + for (BasicBlock::iterator II = BB->getFirstNonPHIOrDbg(), + IE = BB->end(); + II != IE; ++II) { + Instruction *Inst = II; + if (LPadMap && LPadMap->isLandingPadSpecificInst(Inst)) + continue; + if (Inst == Compare || Inst == Branch) + continue; +#if 0 + // Loads of selector values may be used by multiple blocks, but if the + // loaded value is used in this block, it should be used by the + // compare instruction. + if (auto *Load = dyn_cast(Inst)) { + for (auto *U : Load->users()) { + if (cast(U)->getParent() == BB && U != Compare) + return createCleanupHandler(CleanupHandlerMap, BB); + } + continue; } - if (BB == EndBB) - return nullptr; - // The branch was unconditional. - BB = Branch->getSuccessor(0); +#endif + if (match(Inst, m_Intrinsic())) + continue; + return createCleanupHandler(CleanupHandlerMap, BB); + } + // The selector dispatch block should always terminate our search. + assert(BB == EndBB); + return nullptr; + } + + // Anything else is either a catch block or interesting cleanup code. + for (BasicBlock::iterator II = BB->getFirstNonPHIOrDbg(), + IE = BB->end(); + II != IE; ++II) { + Instruction *Inst = II; + if (LPadMap && LPadMap->isLandingPadSpecificInst(Inst)) continue; - } // End else of if branch was conditional - } // End if Branch + // Unconditional branches fall through to this loop. + if (Inst == Branch) + continue; +#if 0 + // A load of a landing pad value outside the landing pad block is + // common but cumbersome to identify here. If we see a load, we'll + // assume it is a landing pad value being loaded. If it isn't + // we should see a use that makes this cleanup code. + if (auto *Load = dyn_cast(Inst)) + continue; +#endif + // If this is a catch block, there is no cleanup code to be found. + if (match(Inst, m_Intrinsic())) + return nullptr; + // Anything else makes this interesting cleanup code. + return createCleanupHandler(CleanupHandlerMap, BB); + } - // Anything else makes this interesting cleanup code. - return createCleanupHandler(CleanupHandlerMap, BB); + // Only unconditional branches in empty blocks should get this far. + assert(Branch && Branch->isUnconditional()); + if (BB == EndBB) + return nullptr; + BB = Branch->getSuccessor(0); } return nullptr; } Index: test/CodeGen/WinEH/cppeh-multi-catch.ll =================================================================== --- test/CodeGen/WinEH/cppeh-multi-catch.ll +++ test/CodeGen/WinEH/cppeh-multi-catch.ll @@ -0,0 +1,241 @@ +; RUN: opt -mtriple=x86_64-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s + +; This test is based on the following code: +; +; void test() +; { +; try { +; may_throw(); +; } catch (int i) { +; handle_int(i); +; } catch (long long ll) { +; handle_long_long(ll); +; } catch (SomeClass &obj) { +; handle_obj(&obj); +; } catch (...) { +; handle_exception(); +; } +; } +; +; The catch handlers were edited to insert 'ret void' after the endcatch call. + +; ModuleID = 'catch-with-type.cpp' +target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-pc-windows-msvc" + +%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] } +%eh.HandlerMapEntry = type { i32, i32 } +%rtti.TypeDescriptor3 = type { i8**, i8*, [4 x i8] } +%rtti.TypeDescriptor15 = type { i8**, i8*, [16 x i8] } +%class.SomeClass = type { i8 } + +$"\01??_R0H@8" = comdat any + +$"\01??_R0_J@8" = comdat any + +$"\01??_R0?AVSomeClass@@@8" = comdat any + +@"\01??_7type_info@@6B@" = external constant i8* +@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat +@__ImageBase = external constant i8 +@llvm.eh.handlermapentry.H = private unnamed_addr constant %eh.HandlerMapEntry { i32 0, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32) }, section "llvm.metadata" +@"\01??_R0_J@8" = linkonce_odr global %rtti.TypeDescriptor3 { i8** @"\01??_7type_info@@6B@", i8* null, [4 x i8] c"._J\00" }, comdat +@llvm.eh.handlermapentry._J = private unnamed_addr constant %eh.HandlerMapEntry { i32 0, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.TypeDescriptor3* @"\01??_R0_J@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32) }, section "llvm.metadata" +@"\01??_R0?AVSomeClass@@@8" = linkonce_odr global %rtti.TypeDescriptor15 { i8** @"\01??_7type_info@@6B@", i8* null, [16 x i8] c".?AVSomeClass@@\00" }, comdat +@"llvm.eh.handlermapentry.reference.?AVSomeClass@@" = private unnamed_addr constant %eh.HandlerMapEntry { i32 8, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.TypeDescriptor15* @"\01??_R0?AVSomeClass@@@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32) }, section "llvm.metadata" + + +; CHECK: define void @"\01?test@@YAXXZ"() #0 { +; CHECK: entry: +; CHECK: [[UNWINDHELP:\%.+]] = alloca i64 +; CHECK: [[OBJ_PTR:\%.+]] = alloca %class.SomeClass*, align 8 +; CHECK: [[LL_PTR:\%.+]] = alloca i64, align 8 +; CHECK: [[I_PTR:\%.+]] = alloca i32, align 4 +; CHECK: call void (...)* @llvm.frameescape(i32* [[I_PTR]], i64* [[LL_PTR]], %class.SomeClass** [[OBJ_PTR]]) +; CHECK: store i64 -2, i64* [[UNWINDHELP]] +; CHECK: [[TMP:\%.+]] = bitcast i64* [[UNWINDHELP]] to i8* +; CHECK: call void @llvm.eh.unwindhelp(i8* [[TMP]]) +; CHECK: invoke void @"\01?may_throw@@YAXXZ"() +; CHECK: to label %invoke.cont unwind label %[[LPAD_LABEL:lpad[0-9]+]] + +; Function Attrs: uwtable +define void @"\01?test@@YAXXZ"() #0 { +entry: + %exn.slot = alloca i8* + %ehselector.slot = alloca i32 + %obj = alloca %class.SomeClass*, align 8 + %ll = alloca i64, align 8 + %i = alloca i32, align 4 + invoke void @"\01?may_throw@@YAXXZ"() + to label %invoke.cont unwind label %lpad + +invoke.cont: ; preds = %entry + br label %try.cont + +; CHECK: [[LPAD_LABEL]]:{{[ ]+}}; preds = %entry +; CHECK: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) +; CHECK-NEXT: catch %eh.HandlerMapEntry* @llvm.eh.handlermapentry.H +; CHECK-NEXT: catch %eh.HandlerMapEntry* @llvm.eh.handlermapentry._J +; CHECK-NEXT: catch %eh.HandlerMapEntry* @"llvm.eh.handlermapentry.reference.?AVSomeClass@@" +; CHECK-NEXT: catch i8* null +; CHECK-NEXT: [[RECOVER:\%.+]] = call i8* (...)* @llvm.eh.actions(i32 1, i8* bitcast (%eh.HandlerMapEntry* @llvm.eh.handlermapentry.H to i8*), i32* %i, i8* (i8*, i8*)* @"\01?test@@YAXXZ.catch", i32 1, i8* bitcast (%eh.HandlerMapEntry* @llvm.eh.handlermapentry._J to i8*), i64* %ll, i8* (i8*, i8*)* @"\01?test@@YAXXZ.catch1", i32 1, i8* bitcast (%eh.HandlerMapEntry* @"llvm.eh.handlermapentry.reference.?AVSomeClass@@" to i8*), %class.SomeClass** %obj, i8* (i8*, i8*)* @"\01?test@@YAXXZ.catch2", i32 1, i8* null, i8* null, i8* (i8*, i8*)* @"\01?test@@YAXXZ.catch3") +; CHECK-NEXT: indirectbr i8* [[RECOVER]], [label %catch14.split, label %catch10.split, label %catch6.split, label %catch.split] + +lpad: ; preds = %entry + %0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) + catch %eh.HandlerMapEntry* @llvm.eh.handlermapentry.H + catch %eh.HandlerMapEntry* @llvm.eh.handlermapentry._J + catch %eh.HandlerMapEntry* @"llvm.eh.handlermapentry.reference.?AVSomeClass@@" + catch i8* null + %1 = extractvalue { i8*, i32 } %0, 0 + store i8* %1, i8** %exn.slot + %2 = extractvalue { i8*, i32 } %0, 1 + store i32 %2, i32* %ehselector.slot + br label %catch.dispatch + +; CHECK-NOT: catch.dispatch: +catch.dispatch: ; preds = %lpad + %sel = load i32, i32* %ehselector.slot + %3 = call i32 @llvm.eh.typeid.for(i8* bitcast (%eh.HandlerMapEntry* @llvm.eh.handlermapentry.H to i8*)) #3 + %matches = icmp eq i32 %sel, %3 + br i1 %matches, label %catch14, label %catch.fallthrough + +; CHECK-NOT: catch14: +; CHECK: catch14.split: +; CHECK-NEXT: ret void +catch14: ; preds = %catch.dispatch + %exn15 = load i8*, i8** %exn.slot + %4 = bitcast i32* %i to i8* + call void @llvm.eh.begincatch(i8* %exn15, i8* %4) #3 + %5 = load i32, i32* %i, align 4 + call void @"\01?handle_int@@YAXH@Z"(i32 %5) + call void @llvm.eh.endcatch() #3 + ret void + +try.cont: ; preds = %invoke.cont + ret void + +; CHECK-NOT: catch.fallthrough: +catch.fallthrough: ; preds = %catch.dispatch + %6 = call i32 @llvm.eh.typeid.for(i8* bitcast (%eh.HandlerMapEntry* @llvm.eh.handlermapentry._J to i8*)) #3 + %matches1 = icmp eq i32 %sel, %6 + br i1 %matches1, label %catch10, label %catch.fallthrough2 + +; CHECK-NOT: catch10: +; CHECK: catch10.split: +; CHECK-NEXT: ret void +catch10: ; preds = %catch.fallthrough + %exn11 = load i8*, i8** %exn.slot + %7 = bitcast i64* %ll to i8* + call void @llvm.eh.begincatch(i8* %exn11, i8* %7) #3 + %8 = load i64, i64* %ll, align 8 + call void @"\01?handle_long_long@@YAX_J@Z"(i64 %8) + call void @llvm.eh.endcatch() #3 + ret void + +; CHECK-NOT: catch.fallthrough2: +catch.fallthrough2: ; preds = %catch.fallthrough + %9 = call i32 @llvm.eh.typeid.for(i8* bitcast (%eh.HandlerMapEntry* @"llvm.eh.handlermapentry.reference.?AVSomeClass@@" to i8*)) #3 + %matches3 = icmp eq i32 %sel, %9 + br i1 %matches3, label %catch6, label %catch + +; CHECK-NOT: catch6: +; CHECK: catch6.split: +; CHECK-NEXT: ret void +catch6: ; preds = %catch.fallthrough2 + %exn7 = load i8*, i8** %exn.slot + %10 = bitcast %class.SomeClass** %obj to i8* + call void @llvm.eh.begincatch(i8* %exn7, i8* %10) #3 + %11 = load %class.SomeClass*, %class.SomeClass** %obj, align 8 + call void @"\01?handle_obj@@YAXPEAVSomeClass@@@Z"(%class.SomeClass* %11) + call void @llvm.eh.endcatch() #3 + ret void + +; CHECK-NOT: catch: +; CHECK: catch.split: +; CHECK-NEXT: ret void +catch: ; preds = %catch.fallthrough2 + %exn = load i8*, i8** %exn.slot + call void @llvm.eh.begincatch(i8* %exn, i8* null) #3 + call void @"\01?handle_exception@@YAXXZ"() call void @llvm.eh.endcatch() #3 + ret void +; CHECK: } +} + +; CHECK-LABEL: define internal i8* @"\01?test@@YAXXZ.catch"(i8*, i8*) { +; CHECK: entry: +; CHECK: %parentframe = alloca i8* +; CHECK: store volatile i8* %1, i8** %parentframe +; CHECK: call void @llvm.eh.parentframe(i8** %parentframe) +; CHECK: [[RECOVER_I:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 0) +; CHECK: [[I_PTR:\%.+]] = bitcast i8* [[RECOVER_I]] to i32* +; CHECK: [[TMP1:\%.+]] = load i32, i32* [[I_PTR]], align 4 +; CHECK: call void @"\01?handle_int@@YAXH@Z"(i32 [[TMP1]]) +; CHECK: ret i8* blockaddress(@"\01?test@@YAXXZ", %catch14.split) +; CHECK: } + +; CHECK-LABEL: define internal i8* @"\01?test@@YAXXZ.catch1"(i8*, i8*) { +; CHECK: entry: +; CHECK: %parentframe = alloca i8* +; CHECK: store volatile i8* %1, i8** %parentframe +; CHECK: call void @llvm.eh.parentframe(i8** %parentframe) +; CHECK: [[RECOVER_LL:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 1) +; CHECK: [[LL_PTR:\%.+]] = bitcast i8* [[RECOVER_LL]] to i64* +; CHECK: [[TMP2:\%.+]] = load i64, i64* [[LL_PTR]], align 8 +; CHECK: call void @"\01?handle_long_long@@YAX_J@Z"(i64 [[TMP2]]) +; CHECK: ret i8* blockaddress(@"\01?test@@YAXXZ", %catch10.split) +; CHECK: } + +; CHECK-LABEL: define internal i8* @"\01?test@@YAXXZ.catch2"(i8*, i8*) { +; CHECK: entry: +; CHECK: %parentframe = alloca i8* +; CHECK: store volatile i8* %1, i8** %parentframe +; CHECK: call void @llvm.eh.parentframe(i8** %parentframe) +; CHECK: [[RECOVER_OBJ:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 2) +; CHECK: [[OBJ_PTR:\%.+]] = bitcast i8* [[RECOVER_OBJ]] to %class.SomeClass** +; CHECK: [[TMP3:\%.+]] = load %class.SomeClass*, %class.SomeClass** [[OBJ_PTR]], align 8 +; CHECK: call void @"\01?handle_obj@@YAXPEAVSomeClass@@@Z"(%class.SomeClass* [[TMP3]]) +; CHECK: ret i8* blockaddress(@"\01?test@@YAXXZ", %catch6.split) +; CHECK: } + +; CHECK-LABEL: define internal i8* @"\01?test@@YAXXZ.catch3"(i8*, i8*) { +; CHECK: entry: +; CHECK: %parentframe = alloca i8* +; CHECK: store volatile i8* %1, i8** %parentframe +; CHECK: call void @llvm.eh.parentframe(i8** %parentframe) +; CHECK: call void @"\01?handle_exception@@YAXXZ"() +; CHECK: ret i8* blockaddress(@"\01?test@@YAXXZ", %catch.split) +; CHECK: } + + +declare void @"\01?may_throw@@YAXXZ"() #1 + +declare i32 @__CxxFrameHandler3(...) + +; Function Attrs: nounwind readnone +declare i32 @llvm.eh.typeid.for(i8*) #2 + +; Function Attrs: nounwind +declare void @llvm.eh.begincatch(i8* nocapture, i8* nocapture) #3 + +declare void @"\01?handle_exception@@YAXXZ"() #1 + +; Function Attrs: nounwind +declare void @llvm.eh.endcatch() #3 + +declare void @"\01?handle_obj@@YAXPEAVSomeClass@@@Z"(%class.SomeClass*) #1 + +declare void @"\01?handle_long_long@@YAX_J@Z"(i64) #1 + +declare void @"\01?handle_int@@YAXH@Z"(i32) #1 + +attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } +attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } +attributes #2 = { nounwind readnone } +attributes #3 = { nounwind } + +!llvm.module.flags = !{!0} +!llvm.ident = !{!1} + +!0 = !{i32 1, !"PIC Level", i32 2} +!1 = !{!"clang version 3.7.0 (trunk 233155) (llvm/trunk 233153)"}