git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134189
91177308-0d34-0410-b5e6-
96231b3b80d8
bool isCopy() const {
return getOpcode() == TargetOpcode::COPY;
}
+ bool isFullCopy() const {
+ return isCopy() && !getOperand(0).getSubReg() && !getOperand(1).getSubReg();
+ }
/// isCopyLike - Return true if the instruction behaves like a copy.
/// This does not include native copy instructions.
/// isFullCopyOf - If MI is a COPY to or from Reg, return the other register,
/// otherwise return 0.
static unsigned isFullCopyOf(const MachineInstr *MI, unsigned Reg) {
- if (!MI->isCopy())
- return 0;
- if (MI->getOperand(0).getSubReg() != 0)
- return 0;
- if (MI->getOperand(1).getSubReg() != 0)
+ if (!MI->isFullCopy())
return 0;
if (MI->getOperand(0).getReg() == Reg)
return MI->getOperand(1).getReg();