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Don't try to create zero-sized stack objects.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128586 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2011-03-30 23:44:13 +00:00
parent 40829ed6f5
commit ee2e0e347e
3 changed files with 16 additions and 4 deletions
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5
lib/Target/ARM/ARMISelLowering.cpp
View File

@ -2391,8 +2391,9 @@ ARMTargetLowering::LowerFormalArguments(SDValue Chain,
// In case of tail call optimization mark all arguments mutable. Since they // In case of tail call optimization mark all arguments mutable. Since they
// could be overwritten by lowering of arguments in case of a tail call. // could be overwritten by lowering of arguments in case of a tail call.
if (Flags.isByVal()) { if (Flags.isByVal()) {
int FI = MFI->CreateFixedObject(Flags.getByValSize(), unsigned Bytes = Flags.getByValSize();
VA.getLocMemOffset(), false); if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects.
int FI = MFI->CreateFixedObject(Bytes, VA.getLocMemOffset(), false);
InVals.push_back(DAG.getFrameIndex(FI, getPointerTy())); InVals.push_back(DAG.getFrameIndex(FI, getPointerTy()));
} else { } else {
int FI = MFI->CreateFixedObject(VA.getLocVT().getSizeInBits()/8, int FI = MFI->CreateFixedObject(VA.getLocVT().getSizeInBits()/8,

5
lib/Target/X86/X86ISelLowering.cpp
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@ -1639,8 +1639,9 @@ X86TargetLowering::LowerMemArgument(SDValue Chain,
// In case of tail call optimization mark all arguments mutable. Since they // In case of tail call optimization mark all arguments mutable. Since they
// could be overwritten by lowering of arguments in case of a tail call. // could be overwritten by lowering of arguments in case of a tail call.
if (Flags.isByVal()) { if (Flags.isByVal()) {
int FI = MFI->CreateFixedObject(Flags.getByValSize(), unsigned Bytes = Flags.getByValSize();
VA.getLocMemOffset(), isImmutable); if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects.
int FI = MFI->CreateFixedObject(Bytes, VA.getLocMemOffset(), isImmutable);
return DAG.getFrameIndex(FI, getPointerTy()); return DAG.getFrameIndex(FI, getPointerTy());
} else { } else {
int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8, int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,

10
test/CodeGen/X86/2011-03-30-CreateFixedObjCrash.ll Normal file
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@ -0,0 +1,10 @@
; RUN: llc < %s -march=x86
; rdar://7983260
%struct.T0 = type {}
define void @fn4(%struct.T0* byval %arg0) nounwind ssp {
entry:
ret void
}