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Fix a compiler-abort on a testcase where the stack-pointer is added to
a symbolic constant. This is unlikely to be intentional, but it shouldn't crash the compiler. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61408 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -454,12 +454,19 @@ void X86RegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
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// FrameIndex with base register with EBP. Add an offset to the offset.
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MI.getOperand(i).ChangeToRegister(BasePtr, false);
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// Now add the frame object offset to the offset from EBP. Offset is a
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// 32-bit integer.
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int Offset = getFrameIndexOffset(MF, FrameIndex) +
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(int)(MI.getOperand(i+3).getImm());
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MI.getOperand(i+3).ChangeToImmediate(Offset);
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// Now add the frame object offset to the offset from EBP.
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if (MI.getOperand(i+3).isImm()) {
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// Offset is a 32-bit integer.
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int Offset = getFrameIndexOffset(MF, FrameIndex) +
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(int)(MI.getOperand(i+3).getImm());
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MI.getOperand(i+3).ChangeToImmediate(Offset);
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} else {
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// Offset is symbolic. This is extremely rare.
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uint64_t Offset = getFrameIndexOffset(MF, FrameIndex) +
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(uint64_t)MI.getOperand(i+3).getOffset();
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MI.getOperand(i+3).setOffset(Offset);
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}
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}
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void
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33
test/CodeGen/X86/2008-12-23-crazy-address.ll
Normal file
33
test/CodeGen/X86/2008-12-23-crazy-address.ll
Normal file
@ -0,0 +1,33 @@
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; RUN: llvm-as < %s | llc -march=x86 -relocation-model=static | grep {lea.*X.*esp} | count 2
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@X = external global [0 x i32]
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define void @foo() nounwind {
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entry:
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%Y = alloca i32
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call void @frob(i32* %Y) nounwind
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%Y3 = bitcast i32* %Y to i8*
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%ctg2 = getelementptr i8* %Y3, i32 ptrtoint ([0 x i32]* @X to i32)
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%0 = ptrtoint i8* %ctg2 to i32
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call void @borf(i32 %0) nounwind
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ret void
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}
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define void @bar(i32 %i) nounwind {
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entry:
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%Y = alloca [10 x i32]
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%0 = getelementptr [10 x i32]* %Y, i32 0, i32 0
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call void @frob(i32* %0) nounwind
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%1 = getelementptr [0 x i32]* @X, i32 0, i32 %i
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%2 = getelementptr [10 x i32]* %Y, i32 0, i32 0
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%3 = ptrtoint i32* %2 to i32
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%4 = bitcast i32* %1 to i8*
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%ctg2 = getelementptr i8* %4, i32 %3
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%5 = ptrtoint i8* %ctg2 to i32
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call void @borf(i32 %5) nounwind
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ret void
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}
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declare void @frob(i32*)
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declare void @borf(i32)
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