diff options
Diffstat (limited to 'lib/CodeGen/ProcessImplicitDefs.cpp')
| -rw-r--r-- | lib/CodeGen/ProcessImplicitDefs.cpp | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/lib/CodeGen/ProcessImplicitDefs.cpp b/lib/CodeGen/ProcessImplicitDefs.cpp index 62f525fa1d..0195918a11 100644 --- a/lib/CodeGen/ProcessImplicitDefs.cpp +++ b/lib/CodeGen/ProcessImplicitDefs.cpp @@ -46,14 +46,15 @@ bool ProcessImplicitDefs::CanTurnIntoImplicitDef(MachineInstr *MI, const TargetInstrInfo *tii_) { unsigned SrcReg, DstReg, SrcSubReg, DstSubReg; if (tii_->isMoveInstr(*MI, SrcReg, DstReg, SrcSubReg, DstSubReg) && - Reg == SrcReg && SrcSubReg == 0 && DstSubReg == 0) + Reg == SrcReg && DstSubReg == 0) return true; - if (OpIdx == 2 && MI->isSubregToReg()) - return true; - if (OpIdx == 1 && MI->isExtractSubreg()) - return true; - return false; + switch(OpIdx) { + case 1: return (MI->isExtractSubreg() || MI->isCopy()) && + MI->getOperand(0).getSubReg() == 0; + case 2: return MI->isSubregToReg() && MI->getOperand(0).getSubReg() == 0; + default: return false; + } } /// processImplicitDefs - Process IMPLICIT_DEF instructions and make sure @@ -219,8 +220,10 @@ bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &fn) { // Turn a copy use into an implicit_def. unsigned SrcReg, DstReg, SrcSubReg, DstSubReg; - if (tii_->isMoveInstr(*RMI, SrcReg, DstReg, SrcSubReg, DstSubReg) && - Reg == SrcReg && SrcSubReg == 0 && DstSubReg == 0) { + if ((RMI->isCopy() && RMI->getOperand(1).getReg() == Reg && + RMI->getOperand(0).getSubReg() == 0) || + (tii_->isMoveInstr(*RMI, SrcReg, DstReg, SrcSubReg, DstSubReg) && + Reg == SrcReg && DstSubReg == 0)) { RMI->setDesc(tii_->get(TargetOpcode::IMPLICIT_DEF)); bool isKill = false; |