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The compact unwinding offsets are divided by 8 on 64-bit machines.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136065 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -490,6 +490,8 @@ uint32_t X86FrameLowering::getCompactUnwindEncoding(MachineFunction &MF) const {
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unsigned SubtractInstr = getSUBriOpcode(Is64Bit, -TailCallReturnAddrDelta);
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unsigned SubtractInstrIdx = (Is64Bit ? 3 : 2);
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unsigned StackDivide = (Is64Bit ? 8 : 4);
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unsigned InstrOffset = 0;
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unsigned CFAOffset = 0;
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unsigned StackAdjust = 0;
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@ -536,7 +538,7 @@ uint32_t X86FrameLowering::getCompactUnwindEncoding(MachineFunction &MF) const {
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// %RSP<def> = SUB64ri8 %RSP, 48
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return 0;
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StackAdjust = MI.getOperand(2).getImm() / 4;
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StackAdjust = MI.getOperand(2).getImm() / StackDivide;
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SubtractInstrIdx += InstrOffset;
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ExpectEnd = true;
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}
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@ -544,7 +546,7 @@ uint32_t X86FrameLowering::getCompactUnwindEncoding(MachineFunction &MF) const {
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// Encode that we are using EBP/RBP as the frame pointer.
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uint32_t CompactUnwindEncoding = 0;
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CFAOffset /= 4;
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CFAOffset /= StackDivide;
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if (HasFP) {
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if ((CFAOffset & 0xFF) != CFAOffset)
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// Offset was too big for compact encoding.
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