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Remap arguments and non-alloca values used by outlined C++ exception handlers.
Differential Revision: http://reviews.llvm.org/D7844 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231042 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Kaylor
parent
51a833938f
commit
f89c6af16b
@ -46,7 +46,7 @@ struct HandlerAllocas {
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// allocation block, and to remap the frame variable allocas (including
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// spill locations as needed) to GEPs that get the variable from the
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// frame allocation structure.
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typedef MapVector<AllocaInst *, HandlerAllocas> FrameVarInfoMap;
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typedef MapVector<Value *, HandlerAllocas> FrameVarInfoMap;
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class WinEHPrepare : public FunctionPass {
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std::unique_ptr<FunctionPass> DwarfPrepare;
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@ -261,22 +261,31 @@ bool WinEHPrepare::prepareCPPEHHandlers(
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// all the entries in the HandlerData have been processed this isn't a
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// problem.
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for (auto &VarInfoEntry : FrameVarInfo) {
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AllocaInst *ParentAlloca = VarInfoEntry.first;
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Value *ParentVal = VarInfoEntry.first;
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HandlerAllocas &AllocaInfo = VarInfoEntry.second;
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// If the instruction still has uses in the parent function or if it is
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// referenced by more than one handler, add it to the frame allocation
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// structure.
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if (ParentAlloca->getNumUses() != 0 || AllocaInfo.Allocas.size() > 1) {
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Type *VarTy = ParentAlloca->getAllocatedType();
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if (auto *ParentAlloca = dyn_cast<AllocaInst>(ParentVal)) {
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// If the instruction still has uses in the parent function or if it is
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// referenced by more than one handler, add it to the frame allocation
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// structure.
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if (ParentAlloca->getNumUses() != 0 || AllocaInfo.Allocas.size() > 1) {
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Type *VarTy = ParentAlloca->getAllocatedType();
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StructTys.push_back(VarTy);
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AllocaInfo.ParentFrameAllocationIndex = Idx++;
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} else {
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// If the variable is not used in the parent frame and it is only used
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// in one handler, the alloca can be removed from the parent frame
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// and the handler will keep its "temporary" alloca to define the value.
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// An element index of -1 is used to indicate this condition.
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AllocaInfo.ParentFrameAllocationIndex = -1;
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}
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} else {
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// FIXME: Sink non-alloca values into the handler if they have no other
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// uses in the parent function after outlining and are only used in
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// one handler.
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Type *VarTy = ParentVal->getType();
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StructTys.push_back(VarTy);
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AllocaInfo.ParentFrameAllocationIndex = Idx++;
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} else {
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// If the variable is not used in the parent frame and it is only used
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// in one handler, the alloca can be removed from the parent frame
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// and the handler will keep its "temporary" alloca to define the value.
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// An element index of -1 is used to indicate this condition.
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AllocaInfo.ParentFrameAllocationIndex = -1;
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}
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}
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@ -331,11 +340,41 @@ bool WinEHPrepare::prepareCPPEHHandlers(
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// Finally, replace all of the temporary allocas for frame variables used in
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// the outlined handlers and the original frame allocas with GEP instructions
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// that get the equivalent pointer from the frame allocation struct.
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Instruction *FrameEHDataInst = cast<Instruction>(FrameEHData);
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BasicBlock::iterator II = FrameEHDataInst;
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++II;
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Instruction *AllocaInsertPt = II;
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for (auto &VarInfoEntry : FrameVarInfo) {
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AllocaInst *ParentAlloca = VarInfoEntry.first;
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Value *ParentVal = VarInfoEntry.first;
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HandlerAllocas &AllocaInfo = VarInfoEntry.second;
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int Idx = AllocaInfo.ParentFrameAllocationIndex;
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// If the mapped value isn't already an alloca, we need to spill it if it
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// is a computed value or copy it if it is an argument.
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AllocaInst *ParentAlloca = dyn_cast<AllocaInst>(ParentVal);
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if (!ParentAlloca) {
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if (auto *Arg = dyn_cast<Argument>(ParentVal)) {
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// Lower this argument to a copy and then demote that to the stack.
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// We can't just use the argument location because the handler needs
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// it to be in the frame allocation block.
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// Use 'select i8 true, %arg, undef' to simulate a 'no-op' instruction.
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Value *TrueValue = ConstantInt::getTrue(Context);
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Value *UndefValue = UndefValue::get(Arg->getType());
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Instruction *SI =
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SelectInst::Create(TrueValue, Arg, UndefValue,
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Arg->getName() + ".tmp", AllocaInsertPt);
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Arg->replaceAllUsesWith(SI);
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// Reset the select operand, because it was clobbered by the RAUW above.
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SI->setOperand(1, Arg);
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ParentAlloca = DemoteRegToStack(*SI, true, SI);
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} else if (auto *PN = dyn_cast<PHINode>(ParentVal)) {
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ParentAlloca = DemotePHIToStack(PN, AllocaInsertPt);
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} else {
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Instruction *ParentInst = cast<Instruction>(ParentVal);
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ParentAlloca = DemoteRegToStack(*ParentInst, true, ParentInst);
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}
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}
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// If we have an index of -1 for this instruction, it means it isn't used
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// outside of this handler. In that case, we just keep the "temporary"
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// alloca in the handler and erase the original alloca from the parent.
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@ -353,6 +392,8 @@ bool WinEHPrepare::prepareCPPEHHandlers(
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ParentAlloca->replaceAllUsesWith(ElementPtr);
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ParentAlloca->removeFromParent();
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ElementPtr->takeName(ParentAlloca);
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if (ParentAlloca == AllocaInsertPt)
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AllocaInsertPt = dyn_cast<Instruction>(ElementPtr);
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delete ParentAlloca;
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// Next replace all outlined allocas that are mapped to it.
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@ -589,38 +630,33 @@ WinEHFrameVariableMaterializer::WinEHFrameVariableMaterializer(
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}
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Value *WinEHFrameVariableMaterializer::materializeValueFor(Value *V) {
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// If we're asked to materialize an alloca variable, we temporarily
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// create a matching alloca in the outlined function. When all the
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// outlining is complete, we'll collect these into a structure and
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// replace these temporary allocas with GEPs referencing the frame
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// allocation block.
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// If we're asked to materialize a value that is an instruction, we
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// temporarily create an alloca in the outlined function and add this
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// to the FrameVarInfo map. When all the outlining is complete, we'll
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// collect these into a structure, spilling non-alloca values in the
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// parent frame as necessary, and replace these temporary allocas with
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// GEPs referencing the frame allocation block.
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// If the value is an alloca, the mapping is direct.
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if (auto *AV = dyn_cast<AllocaInst>(V)) {
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AllocaInst *NewAlloca = Builder.CreateAlloca(
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AV->getAllocatedType(), AV->getArraySize(), AV->getName());
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AllocaInst *NewAlloca = dyn_cast<AllocaInst>(AV->clone());
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Builder.Insert(NewAlloca, AV->getName());
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FrameVarInfo[AV].Allocas.push_back(NewAlloca);
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return NewAlloca;
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}
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// FIXME: Do PHI nodes need special handling?
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// FIXME: Are there other cases we can handle better? GEP, ExtractValue, etc.
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// FIXME: This doesn't work during cloning because it finds an instruction
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// in the use list that isn't yet part of a basic block.
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#if 0
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// If we're asked to remap some other instruction, we'll need to
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// spill it to an alloca variable in the parent function and add a
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// temporary alloca in the outlined function to be processed as
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// described above.
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Instruction *Inst = dyn_cast<Instruction>(V);
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if (Inst) {
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AllocaInst *Spill = DemoteRegToStack(*Inst, true);
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AllocaInst *NewAlloca = Builder.CreateAlloca(Spill->getAllocatedType(),
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Spill->getArraySize());
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FrameVarMap[AV] = NewAlloca;
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return NewAlloca;
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// For other types of instructions or arguments, we need an alloca based on
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// the value's type and a load of the alloca. The alloca will be replaced
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// by a GEP, but the load will stay. In the parent function, the value will
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// be spilled to a location in the frame allocation block.
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if (isa<Instruction>(V) || isa<Argument>(V)) {
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AllocaInst *NewAlloca =
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Builder.CreateAlloca(V->getType(), nullptr, "eh.temp.alloca");
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FrameVarInfo[V].Allocas.push_back(NewAlloca);
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LoadInst *NewLoad = Builder.CreateLoad(NewAlloca, V->getName() + ".reload");
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return NewLoad;
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}
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#endif
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// Don't materialize other values.
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return nullptr;
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}
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181
test/CodeGen/X86/cppeh-inalloca.ll
Normal file
181
test/CodeGen/X86/cppeh-inalloca.ll
Normal file
@ -0,0 +1,181 @@
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; RUN: opt -mtriple=i386-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s
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; This test is built from the following code:
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; struct A {
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; A(int a);
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; A(const A &o);
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; ~A();
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; int a;
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; };
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;
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; void may_throw();
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;
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; int test(A a) {
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; try {
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; may_throw();
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; }
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; catch (int e) {
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; return a.a + e;
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; }
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; return 0;
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; }
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;
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; The test was built for a 32-bit Windows target and then the reference to
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; the inalloca instruction was manually sunk into the landingpad.
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; ModuleID = 'cppeh-inalloca.cpp'
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target datalayout = "e-m:w-p:32:32-i64:64-f80:32-n8:16:32-S32"
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target triple = "i386-pc-windows-msvc"
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%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
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%struct.A = type { i32 }
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$"\01??_R0H@8" = comdat any
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@"\01??_7type_info@@6B@" = external constant i8*
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@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
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; The function entry should be rewritten like this.
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; CHECK: define i32 @"\01?test@@YAHUA@@@Z"(<{ %struct.A }>* inalloca) #0 {
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; CHECK: entry:
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; CHECK: %frame.alloc = call i8* @llvm.frameallocate(i32 24)
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; CHECK: %eh.data = bitcast i8* %frame.alloc to %"struct.\01?test@@YAHUA@@@Z.ehdata"*
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; CHECK: %.tmp.reg2mem = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 3
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; CHECK: %.tmp = select i1 true, <{ %struct.A }>* %0, <{ %struct.A }>* undef
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; CHECK: store <{ %struct.A }>* %.tmp, <{ %struct.A }>** %.tmp.reg2mem
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; CHECK-NOT: %retval = alloca i32, align 4
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; CHECK: %retval = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 4
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; CHECK: %exn.slot = alloca i8*
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; CHECK: %ehselector.slot = alloca i32
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; CHECK-NOT: %e = alloca i32, align 4
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; CHECK: %e = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 2
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; CHECK: %cleanup.dest.slot = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 5
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; CHECK: invoke void @"\01?may_throw@@YAXXZ"()
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; CHECK: to label %invoke.cont unwind label %lpad
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define i32 @"\01?test@@YAHUA@@@Z"(<{ %struct.A }>* inalloca) #0 {
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entry:
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%retval = alloca i32, align 4
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%exn.slot = alloca i8*
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%ehselector.slot = alloca i32
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%e = alloca i32, align 4
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%cleanup.dest.slot = alloca i32
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invoke void @"\01?may_throw@@YAXXZ"()
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to label %invoke.cont unwind label %lpad
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invoke.cont: ; preds = %entry
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br label %try.cont
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lpad: ; preds = %entry
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%1 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
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cleanup
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catch i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)
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%2 = extractvalue { i8*, i32 } %1, 0
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store i8* %2, i8** %exn.slot
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%3 = extractvalue { i8*, i32 } %1, 1
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store i32 %3, i32* %ehselector.slot
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br label %catch.dispatch
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catch.dispatch: ; preds = %lpad
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%sel = load i32* %ehselector.slot
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%4 = call i32 @llvm.eh.typeid.for(i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)) #3
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%matches = icmp eq i32 %sel, %4
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br i1 %matches, label %catch, label %ehcleanup
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catch: ; preds = %catch.dispatch
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%exn = load i8** %exn.slot
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%5 = call i8* @llvm.eh.begincatch(i8* %exn) #3
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%6 = bitcast i8* %5 to i32*
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%7 = load i32* %6, align 4
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store i32 %7, i32* %e, align 4
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%a = getelementptr inbounds <{ %struct.A }>* %0, i32 0, i32 0
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%a1 = getelementptr inbounds %struct.A* %a, i32 0, i32 0
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%8 = load i32* %a1, align 4
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%9 = load i32* %e, align 4
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%add = add nsw i32 %8, %9
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store i32 %add, i32* %retval
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store i32 1, i32* %cleanup.dest.slot
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call void @llvm.eh.endcatch() #3
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br label %cleanup
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try.cont: ; preds = %invoke.cont
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store i32 0, i32* %retval
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store i32 1, i32* %cleanup.dest.slot
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br label %cleanup
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; The cleanup block should be re-written like this.
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; CHECK: cleanup: ; preds = %try.cont, %catch
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; CHECK-NOT: %a2 = getelementptr inbounds <{ %struct.A }>* %0, i32 0, i32 0
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; CHECK: %.tmp.reload1 = load volatile <{ %struct.A }>** %.tmp.reg2mem
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; CHECK: %a2 = getelementptr inbounds <{ %struct.A }>* %.tmp.reload1, i32 0, i32 0
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; CHECK: call x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %a2) #2
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; CHECK: %10 = load i32* %retval
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; CHECK: ret i32 %10
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cleanup: ; preds = %try.cont, %catch
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%a2 = getelementptr inbounds <{ %struct.A }>* %0, i32 0, i32 0
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call x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %a2) #3
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%10 = load i32* %retval
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ret i32 %10
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ehcleanup: ; preds = %catch.dispatch
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%a3 = getelementptr inbounds <{ %struct.A }>* %0, i32 0, i32 0
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call x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %a3) #3
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br label %eh.resume
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eh.resume: ; preds = %ehcleanup
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%exn2 = load i8** %exn.slot
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%sel3 = load i32* %ehselector.slot
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%lpad.val = insertvalue { i8*, i32 } undef, i8* %exn2, 0
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%lpad.val4 = insertvalue { i8*, i32 } %lpad.val, i32 %sel3, 1
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resume { i8*, i32 } %lpad.val4
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}
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; The following catch handler should be outlined.
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; CHECK: define i8* @"\01?test@@YAHUA@@@Z.catch"(i8*, i8*) {
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; CHECK: catch.entry:
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; CHECK: %eh.alloc = call i8* @llvm.framerecover(i8* bitcast (i32 (<{ %struct.A }>*)* @"\01?test@@YAHUA@@@Z" to i8*), i8* %1)
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; CHECK: %eh.data = bitcast i8* %eh.alloc to %"struct.\01?test@@YAHUA@@@Z.ehdata"*
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; CHECK: %eh.obj.ptr = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 1
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; CHECK: %eh.obj = load i8** %eh.obj.ptr
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; CHECK: %e = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 2
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; CHECK: %eh.temp.alloca = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 3
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; CHECK: %.reload = load <{ %struct.A }>** %eh.temp.alloca
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; CHECK: %retval = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 4
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; CHECK: %cleanup.dest.slot = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 5
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; CHECK: %2 = bitcast i8* %eh.obj to i32*
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; CHECK: %3 = load i32* %2, align 4
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; CHECK: store i32 %3, i32* %e, align 4
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; CHECK: %a = getelementptr inbounds <{ %struct.A }>* %.reload, i32 0, i32 0
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; CHECK: %a1 = getelementptr inbounds %struct.A* %a, i32 0, i32 0
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; CHECK: %4 = load i32* %a1, align 4
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; CHECK: %5 = load i32* %e, align 4
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; CHECK: %add = add nsw i32 %4, %5
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; CHECK: store i32 %add, i32* %retval
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; CHECK: store i32 1, i32* %cleanup.dest.slot
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; CHECK: ret i8* blockaddress(@"\01?test@@YAHUA@@@Z", %cleanup)
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; CHECK: }
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declare void @"\01?may_throw@@YAXXZ"() #0
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declare i32 @__CxxFrameHandler3(...)
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; Function Attrs: nounwind readnone
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declare i32 @llvm.eh.typeid.for(i8*) #1
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declare i8* @llvm.eh.begincatch(i8*)
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declare void @llvm.eh.endcatch()
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; Function Attrs: nounwind
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declare x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A*) #2
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attributes #0 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind readnone }
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attributes #2 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #3 = { nounwind }
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!llvm.ident = !{!0}
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!0 = !{!"clang version 3.7.0 (trunk 228868)"}
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264
test/CodeGen/X86/cppeh-nonalloca-frame-values.ll
Normal file
264
test/CodeGen/X86/cppeh-nonalloca-frame-values.ll
Normal file
@ -0,0 +1,264 @@
|
||||
; RUN: opt -mtriple=x86_64-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s
|
||||
|
||||
; This test is based on the following code:
|
||||
;
|
||||
; struct SomeData {
|
||||
; int a;
|
||||
; int b;
|
||||
; };
|
||||
;
|
||||
; void may_throw();
|
||||
; void does_not_throw(int i);
|
||||
; void dump(int *, int, SomeData&);
|
||||
;
|
||||
; void test() {
|
||||
; int NumExceptions = 0;
|
||||
; int ExceptionVal[10];
|
||||
; SomeData Data = { 0, 0 };
|
||||
;
|
||||
; for (int i = 0; i < 10; ++i) {
|
||||
; try {
|
||||
; may_throw();
|
||||
; Data.a += i;
|
||||
; }
|
||||
; catch (int e) {
|
||||
; ExceptionVal[NumExceptions] = e;
|
||||
; ++NumExceptions;
|
||||
; if (e == i)
|
||||
; Data.b += e;
|
||||
; else
|
||||
; Data.a += e;
|
||||
; }
|
||||
; does_not_throw(NumExceptions);
|
||||
; }
|
||||
; dump(ExceptionVal, NumExceptions, Data);
|
||||
; }
|
||||
;
|
||||
; Unlike the cppeh-frame-vars.ll test, this test was generated using -O2
|
||||
; optimization, which results in non-alloca values being used in the
|
||||
; catch handler.
|
||||
|
||||
; ModuleID = 'cppeh-frame-vars.cpp'
|
||||
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
||||
target triple = "x86_64-pc-windows-msvc"
|
||||
|
||||
%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
|
||||
%struct.SomeData = type { i32, i32 }
|
||||
|
||||
$"\01??_R0H@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
|
||||
|
||||
; This structure should be declared for the frame allocation block.
|
||||
; CHECK: %"struct.\01?test@@YAXXZ.ehdata" = type { i32, i8*, i32, [10 x i32], i32, i32*, i32* }
|
||||
|
||||
; The function entry should be rewritten like this.
|
||||
; CHECK: define void @"\01?test@@YAXXZ"() #0 {
|
||||
; CHECK: entry:
|
||||
; CHECK: %frame.alloc = call i8* @llvm.frameallocate(i32 80)
|
||||
; CHECK: %eh.data = bitcast i8* %frame.alloc to %"struct.\01?test@@YAXXZ.ehdata"*
|
||||
; CHECK-NOT: %ExceptionVal = alloca [10 x i32], align 16
|
||||
; CHECK: %NumExceptions.020.reg2mem = getelementptr inbounds %"struct.\01?test@@YAXXZ.ehdata"* %eh.data, i32 0, i32 2
|
||||
; CHECK: %i.019.reg2mem = getelementptr inbounds %"struct.\01?test@@YAXXZ.ehdata"* %eh.data, i32 0, i32 4
|
||||
; CHECK: %ExceptionVal = getelementptr inbounds %"struct.\01?test@@YAXXZ.ehdata"* %eh.data, i32 0, i32 3
|
||||
; CHECK: %Data = alloca i64, align 8
|
||||
; CHECK: %tmpcast = bitcast i64* %Data to %struct.SomeData*
|
||||
; CHECK: %0 = bitcast [10 x i32]* %ExceptionVal to i8*
|
||||
; CHECK: call void @llvm.lifetime.start(i64 40, i8* %0) #1
|
||||
; CHECK: store i64 0, i64* %Data, align 8
|
||||
; CHECK: %a.reg2mem = getelementptr inbounds %"struct.\01?test@@YAXXZ.ehdata"* %eh.data, i32 0, i32 5
|
||||
; CHECK: %a = bitcast i64* %Data to i32*
|
||||
; CHECK: store i32* %a, i32** %a.reg2mem
|
||||
; CHECK: %b.reg2mem = getelementptr inbounds %"struct.\01?test@@YAXXZ.ehdata"* %eh.data, i32 0, i32 6
|
||||
; CHECK: %b = getelementptr inbounds %struct.SomeData* %tmpcast, i64 0, i32 1
|
||||
; CHECK: store i32* %b, i32** %b.reg2mem
|
||||
; CHECK: store i32 0, i32* %NumExceptions.020.reg2mem
|
||||
; CHECK: store i32 0, i32* %i.019.reg2mem
|
||||
; CHECK: br label %for.body
|
||||
|
||||
; Function Attrs: uwtable
|
||||
define void @"\01?test@@YAXXZ"() #0 {
|
||||
entry:
|
||||
%ExceptionVal = alloca [10 x i32], align 16
|
||||
%Data = alloca i64, align 8
|
||||
%tmpcast = bitcast i64* %Data to %struct.SomeData*
|
||||
%0 = bitcast [10 x i32]* %ExceptionVal to i8*
|
||||
call void @llvm.lifetime.start(i64 40, i8* %0) #1
|
||||
store i64 0, i64* %Data, align 8
|
||||
%a = bitcast i64* %Data to i32*
|
||||
%b = getelementptr inbounds %struct.SomeData* %tmpcast, i64 0, i32 1
|
||||
br label %for.body
|
||||
|
||||
; CHECK: for.body:
|
||||
; CHECK-NOT: %NumExceptions.020 = phi i32 [ 0, %entry ], [ %NumExceptions.1, %try.cont ]
|
||||
; CHECK-NOT: %i.019 = phi i32 [ 0, %entry ], [ %inc5, %try.cont ]
|
||||
; CHECK: %i.019.reload = load i32* %i.019.reg2mem
|
||||
; CHECK: %NumExceptions.020.reload = load i32* %NumExceptions.020.reg2mem
|
||||
for.body: ; preds = %entry, %try.cont
|
||||
%NumExceptions.020 = phi i32 [ 0, %entry ], [ %NumExceptions.1, %try.cont ]
|
||||
%i.019 = phi i32 [ 0, %entry ], [ %inc5, %try.cont ]
|
||||
invoke void @"\01?may_throw@@YAXXZ"()
|
||||
to label %invoke.cont unwind label %lpad
|
||||
|
||||
; CHECK: invoke.cont: ; preds = %for.body
|
||||
; CHECK-NOT: %1 = load i32* %a, align 8, !tbaa !2
|
||||
; CHECK-NOT: %add = add nsw i32 %1, %i.019
|
||||
; CHECK-NOT: store i32 %add, i32* %a, align 8, !tbaa !2
|
||||
; CHECK: %a.reload3 = load volatile i32** %a.reg2mem
|
||||
; CHECK: %1 = load i32* %a.reload3, align 8, !tbaa !2
|
||||
; CHECK: %add = add nsw i32 %1, %i.019.reload
|
||||
; CHECK: %a.reload2 = load volatile i32** %a.reg2mem
|
||||
; CHECK: store i32 %add, i32* %a.reload2, align 8, !tbaa !2
|
||||
; CHECK: br label %try.cont
|
||||
invoke.cont: ; preds = %for.body
|
||||
%1 = load i32* %a, align 8, !tbaa !2
|
||||
%add = add nsw i32 %1, %i.019
|
||||
store i32 %add, i32* %a, align 8, !tbaa !2
|
||||
br label %try.cont
|
||||
|
||||
lpad: ; preds = %for.body
|
||||
%2 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
|
||||
catch i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)
|
||||
%3 = extractvalue { i8*, i32 } %2, 1
|
||||
%4 = tail call i32 @llvm.eh.typeid.for(i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)) #1
|
||||
%matches = icmp eq i32 %3, %4
|
||||
br i1 %matches, label %catch, label %eh.resume
|
||||
|
||||
catch: ; preds = %lpad
|
||||
%5 = extractvalue { i8*, i32 } %2, 0
|
||||
%6 = tail call i8* @llvm.eh.begincatch(i8* %5) #1
|
||||
%7 = bitcast i8* %6 to i32*
|
||||
%8 = load i32* %7, align 4, !tbaa !7
|
||||
%idxprom = sext i32 %NumExceptions.020 to i64
|
||||
%arrayidx = getelementptr inbounds [10 x i32]* %ExceptionVal, i64 0, i64 %idxprom
|
||||
store i32 %8, i32* %arrayidx, align 4, !tbaa !7
|
||||
%inc = add nsw i32 %NumExceptions.020, 1
|
||||
%cmp1 = icmp eq i32 %8, %i.019
|
||||
br i1 %cmp1, label %if.then, label %if.else
|
||||
|
||||
if.then: ; preds = %catch
|
||||
%9 = load i32* %b, align 4, !tbaa !8
|
||||
%add2 = add nsw i32 %9, %i.019
|
||||
store i32 %add2, i32* %b, align 4, !tbaa !8
|
||||
br label %if.end
|
||||
|
||||
if.else: ; preds = %catch
|
||||
%10 = load i32* %a, align 8, !tbaa !2
|
||||
%add4 = add nsw i32 %10, %8
|
||||
store i32 %add4, i32* %a, align 8, !tbaa !2
|
||||
br label %if.end
|
||||
|
||||
if.end: ; preds = %if.else, %if.then
|
||||
tail call void @llvm.eh.endcatch() #1
|
||||
br label %try.cont
|
||||
|
||||
; CHECK: try.cont: ; preds = %if.end, %invoke.cont
|
||||
; CHECK-NOT: %NumExceptions.1 = phi i32 [ %NumExceptions.020, %invoke.cont ], [ %inc, %if.end ]
|
||||
; CHECK: %NumExceptions.1 = phi i32 [ %NumExceptions.020.reload, %invoke.cont ], [ %inc, %if.end ]
|
||||
; CHECK: tail call void @"\01?does_not_throw@@YAXH@Z"(i32 %NumExceptions.1)
|
||||
; CHECK-NOT: %inc5 = add nuw nsw i32 %i.019, 1
|
||||
; CHECK: %inc5 = add nuw nsw i32 %i.019.reload, 1
|
||||
; CHECK: %cmp = icmp slt i32 %inc5, 10
|
||||
; CHECK: store i32 %NumExceptions.1, i32* %NumExceptions.020.reg2mem
|
||||
; CHECK: store i32 %inc5, i32* %i.019.reg2mem
|
||||
; CHECK: br i1 %cmp, label %for.body, label %for.end
|
||||
|
||||
try.cont: ; preds = %if.end, %invoke.cont
|
||||
%NumExceptions.1 = phi i32 [ %NumExceptions.020, %invoke.cont ], [ %inc, %if.end ]
|
||||
tail call void @"\01?does_not_throw@@YAXH@Z"(i32 %NumExceptions.1)
|
||||
%inc5 = add nuw nsw i32 %i.019, 1
|
||||
%cmp = icmp slt i32 %inc5, 10
|
||||
br i1 %cmp, label %for.body, label %for.end
|
||||
|
||||
for.end: ; preds = %try.cont
|
||||
%NumExceptions.1.lcssa = phi i32 [ %NumExceptions.1, %try.cont ]
|
||||
%arraydecay = getelementptr inbounds [10 x i32]* %ExceptionVal, i64 0, i64 0
|
||||
call void @"\01?dump@@YAXPEAHHAEAUSomeData@@@Z"(i32* %arraydecay, i32 %NumExceptions.1.lcssa, %struct.SomeData* dereferenceable(8) %tmpcast)
|
||||
call void @llvm.lifetime.end(i64 40, i8* %0) #1
|
||||
ret void
|
||||
|
||||
eh.resume: ; preds = %lpad
|
||||
%.lcssa = phi { i8*, i32 } [ %2, %lpad ]
|
||||
resume { i8*, i32 } %.lcssa
|
||||
}
|
||||
|
||||
; The following catch handler should be outlined.
|
||||
; CHECK: define i8* @"\01?test@@YAXXZ.catch"(i8*, i8*) {
|
||||
; CHECK: catch.entry:
|
||||
; CHECK: %eh.alloc = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1)
|
||||
; CHECK: %eh.data = bitcast i8* %eh.alloc to %"struct.\01?test@@YAXXZ.ehdata"*
|
||||
; CHECK: %eh.obj.ptr = getelementptr inbounds %"struct.\01?test@@YAXXZ.ehdata"* %eh.data, i32 0, i32 1
|
||||
; CHECK: %eh.obj = load i8** %eh.obj.ptr
|
||||
; CHECK: %eh.temp.alloca = getelementptr inbounds %"struct.\01?test@@YAXXZ.ehdata"* %eh.data, i32 0, i32 2
|
||||
; CHECK: %NumExceptions.020.reload = load i32* %eh.temp.alloca
|
||||
; CHECK: %ExceptionVal = getelementptr inbounds %"struct.\01?test@@YAXXZ.ehdata"* %eh.data, i32 0, i32 3
|
||||
; CHECK: %eh.temp.alloca1 = getelementptr inbounds %"struct.\01?test@@YAXXZ.ehdata"* %eh.data, i32 0, i32 4
|
||||
; CHECK: %i.019.reload = load i32* %eh.temp.alloca1
|
||||
; CHECK: %eh.temp.alloca2 = getelementptr inbounds %"struct.\01?test@@YAXXZ.ehdata"* %eh.data, i32 0, i32 5
|
||||
; CHECK: %a.reload = load i32** %eh.temp.alloca2
|
||||
; CHECK: %eh.temp.alloca3 = getelementptr inbounds %"struct.\01?test@@YAXXZ.ehdata"* %eh.data, i32 0, i32 6
|
||||
; CHECK: %b.reload = load i32** %eh.temp.alloca3
|
||||
; CHECK: %2 = bitcast i8* %eh.obj to i32*
|
||||
; CHECK: %3 = load i32* %2, align 4, !tbaa !7
|
||||
; CHECK: %idxprom = sext i32 %NumExceptions.020.reload to i64
|
||||
; CHECK: %arrayidx = getelementptr inbounds [10 x i32]* %ExceptionVal, i64 0, i64 %idxprom
|
||||
; CHECK: store i32 %3, i32* %arrayidx, align 4, !tbaa !7
|
||||
; CHECK: %inc = add nsw i32 %NumExceptions.020.reload, 1
|
||||
; CHECK: %cmp1 = icmp eq i32 %3, %i.019.reload
|
||||
; CHECK: br i1 %cmp1, label %if.then, label %if.else
|
||||
;
|
||||
; CHECK: if.then: ; preds = %catch.entry
|
||||
; CHECK: %4 = load i32* %b.reload, align 4, !tbaa !8
|
||||
; CHECK: %add2 = add nsw i32 %4, %i.019.reload
|
||||
; CHECK: store i32 %add2, i32* %b.reload, align 4, !tbaa !8
|
||||
; CHECK: br label %if.end
|
||||
;
|
||||
; CHECK: if.else: ; preds = %catch.entry
|
||||
; CHECK: %5 = load i32* %a.reload, align 8, !tbaa !2
|
||||
; CHECK: %add4 = add nsw i32 %5, %3
|
||||
; CHECK: store i32 %add4, i32* %a.reload, align 8, !tbaa !2
|
||||
; CHECK: br label %if.end
|
||||
;
|
||||
; CHECK: if.end: ; preds = %if.else, %if.then
|
||||
; CHECK: ret i8* blockaddress(@"\01?test@@YAXXZ", %try.cont)
|
||||
; CHECK: }
|
||||
|
||||
; Function Attrs: nounwind
|
||||
declare void @llvm.lifetime.start(i64, i8* nocapture) #1
|
||||
|
||||
declare void @"\01?may_throw@@YAXXZ"() #2
|
||||
|
||||
declare i32 @__CxxFrameHandler3(...)
|
||||
|
||||
; Function Attrs: nounwind readnone
|
||||
declare i32 @llvm.eh.typeid.for(i8*) #3
|
||||
|
||||
declare i8* @llvm.eh.begincatch(i8*)
|
||||
|
||||
declare void @llvm.eh.endcatch()
|
||||
|
||||
declare void @"\01?does_not_throw@@YAXH@Z"(i32) #2
|
||||
|
||||
declare void @"\01?dump@@YAXPEAHHAEAUSomeData@@@Z"(i32*, i32, %struct.SomeData* dereferenceable(8)) #2
|
||||
|
||||
; Function Attrs: nounwind
|
||||
declare void @llvm.lifetime.end(i64, i8* nocapture) #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 = { nounwind }
|
||||
attributes #2 = { "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 #3 = { nounwind readnone }
|
||||
|
||||
!llvm.module.flags = !{!0}
|
||||
!llvm.ident = !{!1}
|
||||
|
||||
!0 = !{i32 1, !"PIC Level", i32 2}
|
||||
!1 = !{!"clang version 3.7.0 (trunk 228868)"}
|
||||
!2 = !{!3, !4, i64 0}
|
||||
!3 = !{!"?AUSomeData@@", !4, i64 0, !4, i64 4}
|
||||
!4 = !{!"int", !5, i64 0}
|
||||
!5 = !{!"omnipotent char", !6, i64 0}
|
||||
!6 = !{!"Simple C/C++ TBAA"}
|
||||
!7 = !{!4, !4, i64 0}
|
||||
!8 = !{!3, !4, i64 4}
|
||||
Loading…
x
Reference in New Issue
Block a user