diff options
Diffstat (limited to 'lib/CodeGen/ProcessImplicitDefs.cpp')
| -rw-r--r-- | lib/CodeGen/ProcessImplicitDefs.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/CodeGen/ProcessImplicitDefs.cpp b/lib/CodeGen/ProcessImplicitDefs.cpp index d7179b3..62f525f 100644 --- a/lib/CodeGen/ProcessImplicitDefs.cpp +++ b/lib/CodeGen/ProcessImplicitDefs.cpp @@ -46,7 +46,7 @@ bool ProcessImplicitDefs::CanTurnIntoImplicitDef(MachineInstr *MI, const TargetInstrInfo *tii_) { unsigned SrcReg, DstReg, SrcSubReg, DstSubReg; if (tii_->isMoveInstr(*MI, SrcReg, DstReg, SrcSubReg, DstSubReg) && - Reg == SrcReg) + Reg == SrcReg && SrcSubReg == 0 && DstSubReg == 0) return true; if (OpIdx == 2 && MI->isSubregToReg()) @@ -89,6 +89,8 @@ bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &fn) { MachineInstr *MI = &*I; ++I; if (MI->isImplicitDef()) { + if (MI->getOperand(0).getSubReg()) + continue; unsigned Reg = MI->getOperand(0).getReg(); ImpDefRegs.insert(Reg); if (TargetRegisterInfo::isPhysicalRegister(Reg)) { @@ -218,7 +220,7 @@ 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) { + Reg == SrcReg && SrcSubReg == 0 && DstSubReg == 0) { RMI->setDesc(tii_->get(TargetOpcode::IMPLICIT_DEF)); bool isKill = false; |
