for (unsigned i = 1; i != NumOps; ++i) {
SDValue Op = Node->getOperand(i);
if ((i & 1) == 0) {
- unsigned SubIdx = cast<ConstantSDNode>(Op)->getZExtValue();
- unsigned SubReg = getVR(Node->getOperand(i-1), VRBaseMap);
- const TargetRegisterClass *TRC = MRI->getRegClass(SubReg);
- const TargetRegisterClass *SRC =
+ RegisterSDNode *R = dyn_cast<RegisterSDNode>(Node->getOperand(i-1));
+ // Skip physical registers as they don't have a vreg to get and we'll
+ // insert copies for them in TwoAddressInstructionPass anyway.
+ if (!R || !TargetRegisterInfo::isPhysicalRegister(R->getReg())) {
+ unsigned SubIdx = cast<ConstantSDNode>(Op)->getZExtValue();
+ unsigned SubReg = getVR(Node->getOperand(i-1), VRBaseMap);
+ const TargetRegisterClass *TRC = MRI->getRegClass(SubReg);
+ const TargetRegisterClass *SRC =
TRI->getMatchingSuperRegClass(RC, TRC, SubIdx);
- if (SRC && SRC != RC) {
- MRI->setRegClass(NewVReg, SRC);
- RC = SRC;
+ if (SRC && SRC != RC) {
+ MRI->setRegClass(NewVReg, SRC);
+ RC = SRC;
+ }
}
}
AddOperand(MI, Op, i+1, &II, VRBaseMap, /*IsDebug=*/false,
for (unsigned i = 1, e = MI->getNumOperands(); i < e; i += 2) {
unsigned SrcReg = MI->getOperand(i).getReg();
unsigned SubIdx = MI->getOperand(i+1).getImm();
- if (MI->getOperand(i).getSubReg() ||
- TargetRegisterInfo::isPhysicalRegister(SrcReg)) {
- DEBUG(dbgs() << "Illegal REG_SEQUENCE instruction:" << *MI);
- llvm_unreachable(0);
+ // DefMI of NULL means the value does not have a vreg in this block
+ // i.e., its a physical register or a subreg.
+ // In either case we force a copy to be generated.
+ MachineInstr *DefMI = NULL;
+ if (!MI->getOperand(i).getSubReg() &&
+ !TargetRegisterInfo::isPhysicalRegister(SrcReg)) {
+ DefMI = MRI->getVRegDef(SrcReg);
}
- MachineInstr *DefMI = MRI->getVRegDef(SrcReg);
- if (DefMI->isImplicitDef()) {
+ if (DefMI && DefMI->isImplicitDef()) {
DefMI->eraseFromParent();
continue;
}
IsImpDef = false;
// Remember COPY sources. These might be candidate for coalescing.
- if (DefMI->isCopy() && DefMI->getOperand(1).getSubReg())
+ if (DefMI && DefMI->isCopy() && DefMI->getOperand(1).getSubReg())
RealSrcs.push_back(DefMI->getOperand(1).getReg());
bool isKill = MI->getOperand(i).isKill();
- if (!Seen.insert(SrcReg) || MI->getParent() != DefMI->getParent() ||
+ if (!DefMI || !Seen.insert(SrcReg) ||
+ MI->getParent() != DefMI->getParent() ||
!isKill || HasOtherRegSequenceUses(SrcReg, MI, MRI) ||
!TRI->getMatchingSuperRegClass(MRI->getRegClass(DstReg),
MRI->getRegClass(SrcReg), SubIdx)) {
.addReg(DstReg, RegState::Define, SubIdx)
.addReg(SrcReg, getKillRegState(isKill));
MI->getOperand(i).setReg(0);
- if (LV && isKill)
+ if (LV && isKill && !TargetRegisterInfo::isPhysicalRegister(SrcReg))
LV->replaceKillInstruction(SrcReg, MI, CopyMI);
DEBUG(dbgs() << "Inserted: " << *CopyMI);
}