[llvm] r231042 - Remap arguments and non-alloca values used by outlined C++ exception handlers.
Andrew Kaylor
andrew.kaylor at intel.com
Mon Mar 2 16:41:04 PST 2015
Author: akaylor
Date: Mon Mar 2 18:41:03 2015
New Revision: 231042
URL: http://llvm.org/viewvc/llvm-project?rev=231042&view=rev
Log:
Remap arguments and non-alloca values used by outlined C++ exception handlers.
Differential Revision: http://reviews.llvm.org/D7844
Added:
llvm/trunk/test/CodeGen/X86/cppeh-inalloca.ll
llvm/trunk/test/CodeGen/X86/cppeh-nonalloca-frame-values.ll
Modified:
llvm/trunk/lib/CodeGen/WinEHPrepare.cpp
Modified: llvm/trunk/lib/CodeGen/WinEHPrepare.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/WinEHPrepare.cpp?rev=231042&r1=231041&r2=231042&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/WinEHPrepare.cpp (original)
+++ llvm/trunk/lib/CodeGen/WinEHPrepare.cpp Mon Mar 2 18:41:03 2015
@@ -46,7 +46,7 @@ struct HandlerAllocas {
// allocation block, and to remap the frame variable allocas (including
// spill locations as needed) to GEPs that get the variable from the
// frame allocation structure.
-typedef MapVector<AllocaInst *, HandlerAllocas> FrameVarInfoMap;
+typedef MapVector<Value *, HandlerAllocas> FrameVarInfoMap;
class WinEHPrepare : public FunctionPass {
std::unique_ptr<FunctionPass> DwarfPrepare;
@@ -261,22 +261,31 @@ bool WinEHPrepare::prepareCPPEHHandlers(
// all the entries in the HandlerData have been processed this isn't a
// problem.
for (auto &VarInfoEntry : FrameVarInfo) {
- AllocaInst *ParentAlloca = VarInfoEntry.first;
+ Value *ParentVal = VarInfoEntry.first;
HandlerAllocas &AllocaInfo = VarInfoEntry.second;
- // If the instruction still has uses in the parent function or if it is
- // referenced by more than one handler, add it to the frame allocation
- // structure.
- if (ParentAlloca->getNumUses() != 0 || AllocaInfo.Allocas.size() > 1) {
- Type *VarTy = ParentAlloca->getAllocatedType();
+ if (auto *ParentAlloca = dyn_cast<AllocaInst>(ParentVal)) {
+ // If the instruction still has uses in the parent function or if it is
+ // referenced by more than one handler, add it to the frame allocation
+ // structure.
+ if (ParentAlloca->getNumUses() != 0 || AllocaInfo.Allocas.size() > 1) {
+ Type *VarTy = ParentAlloca->getAllocatedType();
+ StructTys.push_back(VarTy);
+ AllocaInfo.ParentFrameAllocationIndex = Idx++;
+ } else {
+ // If the variable is not used in the parent frame and it is only used
+ // in one handler, the alloca can be removed from the parent frame
+ // and the handler will keep its "temporary" alloca to define the value.
+ // An element index of -1 is used to indicate this condition.
+ AllocaInfo.ParentFrameAllocationIndex = -1;
+ }
+ } else {
+ // FIXME: Sink non-alloca values into the handler if they have no other
+ // uses in the parent function after outlining and are only used in
+ // one handler.
+ Type *VarTy = ParentVal->getType();
StructTys.push_back(VarTy);
AllocaInfo.ParentFrameAllocationIndex = Idx++;
- } else {
- // If the variable is not used in the parent frame and it is only used
- // in one handler, the alloca can be removed from the parent frame
- // and the handler will keep its "temporary" alloca to define the value.
- // An element index of -1 is used to indicate this condition.
- AllocaInfo.ParentFrameAllocationIndex = -1;
}
}
@@ -331,11 +340,41 @@ bool WinEHPrepare::prepareCPPEHHandlers(
// Finally, replace all of the temporary allocas for frame variables used in
// the outlined handlers and the original frame allocas with GEP instructions
// that get the equivalent pointer from the frame allocation struct.
+ Instruction *FrameEHDataInst = cast<Instruction>(FrameEHData);
+ BasicBlock::iterator II = FrameEHDataInst;
+ ++II;
+ Instruction *AllocaInsertPt = II;
for (auto &VarInfoEntry : FrameVarInfo) {
- AllocaInst *ParentAlloca = VarInfoEntry.first;
+ Value *ParentVal = VarInfoEntry.first;
HandlerAllocas &AllocaInfo = VarInfoEntry.second;
int Idx = AllocaInfo.ParentFrameAllocationIndex;
+ // If the mapped value isn't already an alloca, we need to spill it if it
+ // is a computed value or copy it if it is an argument.
+ AllocaInst *ParentAlloca = dyn_cast<AllocaInst>(ParentVal);
+ if (!ParentAlloca) {
+ if (auto *Arg = dyn_cast<Argument>(ParentVal)) {
+ // Lower this argument to a copy and then demote that to the stack.
+ // We can't just use the argument location because the handler needs
+ // it to be in the frame allocation block.
+ // Use 'select i8 true, %arg, undef' to simulate a 'no-op' instruction.
+ Value *TrueValue = ConstantInt::getTrue(Context);
+ Value *UndefValue = UndefValue::get(Arg->getType());
+ Instruction *SI =
+ SelectInst::Create(TrueValue, Arg, UndefValue,
+ Arg->getName() + ".tmp", AllocaInsertPt);
+ Arg->replaceAllUsesWith(SI);
+ // Reset the select operand, because it was clobbered by the RAUW above.
+ SI->setOperand(1, Arg);
+ ParentAlloca = DemoteRegToStack(*SI, true, SI);
+ } else if (auto *PN = dyn_cast<PHINode>(ParentVal)) {
+ ParentAlloca = DemotePHIToStack(PN, AllocaInsertPt);
+ } else {
+ Instruction *ParentInst = cast<Instruction>(ParentVal);
+ ParentAlloca = DemoteRegToStack(*ParentInst, true, ParentInst);
+ }
+ }
+
// If we have an index of -1 for this instruction, it means it isn't used
// outside of this handler. In that case, we just keep the "temporary"
// alloca in the handler and erase the original alloca from the parent.
@@ -353,6 +392,8 @@ bool WinEHPrepare::prepareCPPEHHandlers(
ParentAlloca->replaceAllUsesWith(ElementPtr);
ParentAlloca->removeFromParent();
ElementPtr->takeName(ParentAlloca);
+ if (ParentAlloca == AllocaInsertPt)
+ AllocaInsertPt = dyn_cast<Instruction>(ElementPtr);
delete ParentAlloca;
// Next replace all outlined allocas that are mapped to it.
@@ -589,38 +630,33 @@ WinEHFrameVariableMaterializer::WinEHFra
}
Value *WinEHFrameVariableMaterializer::materializeValueFor(Value *V) {
- // If we're asked to materialize an alloca variable, we temporarily
- // create a matching alloca in the outlined function. When all the
- // outlining is complete, we'll collect these into a structure and
- // replace these temporary allocas with GEPs referencing the frame
- // allocation block.
+ // If we're asked to materialize a value that is an instruction, we
+ // temporarily create an alloca in the outlined function and add this
+ // to the FrameVarInfo map. When all the outlining is complete, we'll
+ // collect these into a structure, spilling non-alloca values in the
+ // parent frame as necessary, and replace these temporary allocas with
+ // GEPs referencing the frame allocation block.
+
+ // If the value is an alloca, the mapping is direct.
if (auto *AV = dyn_cast<AllocaInst>(V)) {
- AllocaInst *NewAlloca = Builder.CreateAlloca(
- AV->getAllocatedType(), AV->getArraySize(), AV->getName());
+ AllocaInst *NewAlloca = dyn_cast<AllocaInst>(AV->clone());
+ Builder.Insert(NewAlloca, AV->getName());
FrameVarInfo[AV].Allocas.push_back(NewAlloca);
return NewAlloca;
}
-// FIXME: Do PHI nodes need special handling?
-
-// FIXME: Are there other cases we can handle better? GEP, ExtractValue, etc.
-
-// FIXME: This doesn't work during cloning because it finds an instruction
-// in the use list that isn't yet part of a basic block.
-#if 0
- // If we're asked to remap some other instruction, we'll need to
- // spill it to an alloca variable in the parent function and add a
- // temporary alloca in the outlined function to be processed as
- // described above.
- Instruction *Inst = dyn_cast<Instruction>(V);
- if (Inst) {
- AllocaInst *Spill = DemoteRegToStack(*Inst, true);
- AllocaInst *NewAlloca = Builder.CreateAlloca(Spill->getAllocatedType(),
- Spill->getArraySize());
- FrameVarMap[AV] = NewAlloca;
- return NewAlloca;
+ // For other types of instructions or arguments, we need an alloca based on
+ // the value's type and a load of the alloca. The alloca will be replaced
+ // by a GEP, but the load will stay. In the parent function, the value will
+ // be spilled to a location in the frame allocation block.
+ if (isa<Instruction>(V) || isa<Argument>(V)) {
+ AllocaInst *NewAlloca =
+ Builder.CreateAlloca(V->getType(), nullptr, "eh.temp.alloca");
+ FrameVarInfo[V].Allocas.push_back(NewAlloca);
+ LoadInst *NewLoad = Builder.CreateLoad(NewAlloca, V->getName() + ".reload");
+ return NewLoad;
}
-#endif
+ // Don't materialize other values.
return nullptr;
}
Added: llvm/trunk/test/CodeGen/X86/cppeh-inalloca.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/cppeh-inalloca.ll?rev=231042&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/cppeh-inalloca.ll (added)
+++ llvm/trunk/test/CodeGen/X86/cppeh-inalloca.ll Mon Mar 2 18:41:03 2015
@@ -0,0 +1,181 @@
+; RUN: opt -mtriple=i386-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s
+
+; This test is built from the following code:
+; struct A {
+; A(int a);
+; A(const A &o);
+; ~A();
+; int a;
+; };
+;
+; void may_throw();
+;
+; int test(A a) {
+; try {
+; may_throw();
+; }
+; catch (int e) {
+; return a.a + e;
+; }
+; return 0;
+; }
+;
+; The test was built for a 32-bit Windows target and then the reference to
+; the inalloca instruction was manually sunk into the landingpad.
+
+; ModuleID = 'cppeh-inalloca.cpp'
+target datalayout = "e-m:w-p:32:32-i64:64-f80:32-n8:16:32-S32"
+target triple = "i386-pc-windows-msvc"
+
+%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
+%struct.A = type { i32 }
+
+$"\01??_R0H at 8" = comdat any
+
+@"\01??_7type_info@@6B@" = external constant i8*
+@"\01??_R0H at 8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
+
+; The function entry should be rewritten like this.
+; CHECK: define i32 @"\01?test@@YAHUA@@@Z"(<{ %struct.A }>* inalloca) #0 {
+; CHECK: entry:
+; CHECK: %frame.alloc = call i8* @llvm.frameallocate(i32 24)
+; CHECK: %eh.data = bitcast i8* %frame.alloc to %"struct.\01?test@@YAHUA@@@Z.ehdata"*
+; CHECK: %.tmp.reg2mem = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 3
+; CHECK: %.tmp = select i1 true, <{ %struct.A }>* %0, <{ %struct.A }>* undef
+; CHECK: store <{ %struct.A }>* %.tmp, <{ %struct.A }>** %.tmp.reg2mem
+; CHECK-NOT: %retval = alloca i32, align 4
+; CHECK: %retval = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 4
+; CHECK: %exn.slot = alloca i8*
+; CHECK: %ehselector.slot = alloca i32
+; CHECK-NOT: %e = alloca i32, align 4
+; CHECK: %e = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 2
+; CHECK: %cleanup.dest.slot = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 5
+; CHECK: invoke void @"\01?may_throw@@YAXXZ"()
+; CHECK: to label %invoke.cont unwind label %lpad
+
+define i32 @"\01?test@@YAHUA@@@Z"(<{ %struct.A }>* inalloca) #0 {
+entry:
+ %retval = alloca i32, align 4
+ %exn.slot = alloca i8*
+ %ehselector.slot = alloca i32
+ %e = alloca i32, align 4
+ %cleanup.dest.slot = alloca i32
+ invoke void @"\01?may_throw@@YAXXZ"()
+ to label %invoke.cont unwind label %lpad
+
+invoke.cont: ; preds = %entry
+ br label %try.cont
+
+lpad: ; preds = %entry
+ %1 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
+ cleanup
+ catch i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H at 8" to i8*)
+ %2 = extractvalue { i8*, i32 } %1, 0
+ store i8* %2, i8** %exn.slot
+ %3 = extractvalue { i8*, i32 } %1, 1
+ store i32 %3, i32* %ehselector.slot
+ br label %catch.dispatch
+
+catch.dispatch: ; preds = %lpad
+ %sel = load i32* %ehselector.slot
+ %4 = call i32 @llvm.eh.typeid.for(i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H at 8" to i8*)) #3
+ %matches = icmp eq i32 %sel, %4
+ br i1 %matches, label %catch, label %ehcleanup
+
+catch: ; preds = %catch.dispatch
+ %exn = load i8** %exn.slot
+ %5 = call i8* @llvm.eh.begincatch(i8* %exn) #3
+ %6 = bitcast i8* %5 to i32*
+ %7 = load i32* %6, align 4
+ store i32 %7, i32* %e, align 4
+ %a = getelementptr inbounds <{ %struct.A }>* %0, i32 0, i32 0
+ %a1 = getelementptr inbounds %struct.A* %a, i32 0, i32 0
+ %8 = load i32* %a1, align 4
+ %9 = load i32* %e, align 4
+ %add = add nsw i32 %8, %9
+ store i32 %add, i32* %retval
+ store i32 1, i32* %cleanup.dest.slot
+ call void @llvm.eh.endcatch() #3
+ br label %cleanup
+
+try.cont: ; preds = %invoke.cont
+ store i32 0, i32* %retval
+ store i32 1, i32* %cleanup.dest.slot
+ br label %cleanup
+
+; The cleanup block should be re-written like this.
+; CHECK: cleanup: ; preds = %try.cont, %catch
+; CHECK-NOT: %a2 = getelementptr inbounds <{ %struct.A }>* %0, i32 0, i32 0
+; CHECK: %.tmp.reload1 = load volatile <{ %struct.A }>** %.tmp.reg2mem
+; CHECK: %a2 = getelementptr inbounds <{ %struct.A }>* %.tmp.reload1, i32 0, i32 0
+; CHECK: call x86_thiscallcc void @"\01??1A@@QAE at XZ"(%struct.A* %a2) #2
+; CHECK: %10 = load i32* %retval
+; CHECK: ret i32 %10
+
+cleanup: ; preds = %try.cont, %catch
+ %a2 = getelementptr inbounds <{ %struct.A }>* %0, i32 0, i32 0
+ call x86_thiscallcc void @"\01??1A@@QAE at XZ"(%struct.A* %a2) #3
+ %10 = load i32* %retval
+ ret i32 %10
+
+ehcleanup: ; preds = %catch.dispatch
+ %a3 = getelementptr inbounds <{ %struct.A }>* %0, i32 0, i32 0
+ call x86_thiscallcc void @"\01??1A@@QAE at XZ"(%struct.A* %a3) #3
+ br label %eh.resume
+
+eh.resume: ; preds = %ehcleanup
+ %exn2 = load i8** %exn.slot
+ %sel3 = load i32* %ehselector.slot
+ %lpad.val = insertvalue { i8*, i32 } undef, i8* %exn2, 0
+ %lpad.val4 = insertvalue { i8*, i32 } %lpad.val, i32 %sel3, 1
+ resume { i8*, i32 } %lpad.val4
+}
+
+; The following catch handler should be outlined.
+; CHECK: define i8* @"\01?test@@YAHUA@@@Z.catch"(i8*, i8*) {
+; CHECK: catch.entry:
+; CHECK: %eh.alloc = call i8* @llvm.framerecover(i8* bitcast (i32 (<{ %struct.A }>*)* @"\01?test@@YAHUA@@@Z" to i8*), i8* %1)
+; CHECK: %eh.data = bitcast i8* %eh.alloc to %"struct.\01?test@@YAHUA@@@Z.ehdata"*
+; CHECK: %eh.obj.ptr = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 1
+; CHECK: %eh.obj = load i8** %eh.obj.ptr
+; CHECK: %e = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 2
+; CHECK: %eh.temp.alloca = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 3
+; CHECK: %.reload = load <{ %struct.A }>** %eh.temp.alloca
+; CHECK: %retval = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 4
+; CHECK: %cleanup.dest.slot = getelementptr inbounds %"struct.\01?test@@YAHUA@@@Z.ehdata"* %eh.data, i32 0, i32 5
+; CHECK: %2 = bitcast i8* %eh.obj to i32*
+; CHECK: %3 = load i32* %2, align 4
+; CHECK: store i32 %3, i32* %e, align 4
+; CHECK: %a = getelementptr inbounds <{ %struct.A }>* %.reload, i32 0, i32 0
+; CHECK: %a1 = getelementptr inbounds %struct.A* %a, i32 0, i32 0
+; CHECK: %4 = load i32* %a1, align 4
+; CHECK: %5 = load i32* %e, align 4
+; CHECK: %add = add nsw i32 %4, %5
+; CHECK: store i32 %add, i32* %retval
+; CHECK: store i32 1, i32* %cleanup.dest.slot
+; CHECK: ret i8* blockaddress(@"\01?test@@YAHUA@@@Z", %cleanup)
+; CHECK: }
+
+
+declare void @"\01?may_throw@@YAXXZ"() #0
+
+declare i32 @__CxxFrameHandler3(...)
+
+; Function Attrs: nounwind readnone
+declare i32 @llvm.eh.typeid.for(i8*) #1
+
+declare i8* @llvm.eh.begincatch(i8*)
+
+declare void @llvm.eh.endcatch()
+
+; Function Attrs: nounwind
+declare x86_thiscallcc void @"\01??1A@@QAE at XZ"(%struct.A*) #2
+
+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" }
+attributes #1 = { nounwind readnone }
+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" }
+attributes #3 = { nounwind }
+
+!llvm.ident = !{!0}
+
+!0 = !{!"clang version 3.7.0 (trunk 228868)"}
Added: llvm/trunk/test/CodeGen/X86/cppeh-nonalloca-frame-values.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/cppeh-nonalloca-frame-values.ll?rev=231042&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/cppeh-nonalloca-frame-values.ll (added)
+++ llvm/trunk/test/CodeGen/X86/cppeh-nonalloca-frame-values.ll Mon Mar 2 18:41:03 2015
@@ -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 at 8" = comdat any
+
+@"\01??_7type_info@@6B@" = external constant i8*
+@"\01??_R0H at 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 at 8" to i8*)
+ %3 = extractvalue { i8*, i32 } %2, 1
+ %4 = tail call i32 @llvm.eh.typeid.for(i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H at 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 at 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 at 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 at 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}
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