diff options
| -rw-r--r-- | lib/Target/X86/X86FrameLowering.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/Target/X86/X86FrameLowering.cpp b/lib/Target/X86/X86FrameLowering.cpp index cdc83054aa..d5e9aa6d64 100644 --- a/lib/Target/X86/X86FrameLowering.cpp +++ b/lib/Target/X86/X86FrameLowering.cpp @@ -490,6 +490,8 @@ uint32_t X86FrameLowering::getCompactUnwindEncoding(MachineFunction &MF) const { unsigned SubtractInstr = getSUBriOpcode(Is64Bit, -TailCallReturnAddrDelta); unsigned SubtractInstrIdx = (Is64Bit ? 3 : 2); + unsigned StackDivide = (Is64Bit ? 8 : 4); + unsigned InstrOffset = 0; unsigned CFAOffset = 0; unsigned StackAdjust = 0; @@ -536,7 +538,7 @@ uint32_t X86FrameLowering::getCompactUnwindEncoding(MachineFunction &MF) const { // %RSP<def> = SUB64ri8 %RSP, 48 return 0; - StackAdjust = MI.getOperand(2).getImm() / 4; + StackAdjust = MI.getOperand(2).getImm() / StackDivide; SubtractInstrIdx += InstrOffset; ExpectEnd = true; } @@ -544,7 +546,7 @@ uint32_t X86FrameLowering::getCompactUnwindEncoding(MachineFunction &MF) const { // Encode that we are using EBP/RBP as the frame pointer. uint32_t CompactUnwindEncoding = 0; - CFAOffset /= 4; + CFAOffset /= StackDivide; if (HasFP) { if ((CFAOffset & 0xFF) != CFAOffset) // Offset was too big for compact encoding. |