diff options
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrInfo.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp index d597ec90ea6..bf7dcb232b8 100644 --- a/llvm/lib/Target/X86/X86InstrInfo.cpp +++ b/llvm/lib/Target/X86/X86InstrInfo.cpp @@ -3616,8 +3616,9 @@ bool X86InstrInfo::optimizeCompareInstr(MachineInstr &CmpInstr, unsigned SrcReg, if (!IsCmpZero && !Sub) return false; - bool IsSwapped = (SrcReg2 != 0 && Sub->getOperand(1).getReg() == SrcReg2 && - Sub->getOperand(2).getReg() == SrcReg); + bool IsSwapped = + (SrcReg2 != 0 && Sub && Sub->getOperand(1).getReg() == SrcReg2 && + Sub->getOperand(2).getReg() == SrcReg); // Scan forward from the instruction after CmpInstr for uses of EFLAGS. // It is safe to remove CmpInstr if EFLAGS is redefined or killed. |
