- if (DefMI && DefMI->isImplicitDef()) {
- DefMI->eraseFromParent();
- continue;
- }
- IsImpDef = false;
-
- // Remember COPY sources. These might be candidate for coalescing.
- if (DefMI && DefMI->isCopy() && DefMI->getOperand(1).getSubReg())
- RealSrcs.push_back(DefMI->getOperand(1).getReg());
-
- bool isKill = MI->getOperand(i).isKill();
- if (!DefMI || !Seen.insert(SrcReg) ||
- MI->getParent() != DefMI->getParent() ||
- !isKill || HasOtherRegSequenceUses(SrcReg, MI, MRI) ||
- !TRI->getMatchingSuperRegClass(MRI->getRegClass(DstReg),
- MRI->getRegClass(SrcReg), SubIdx)) {
- // REG_SEQUENCE cannot have duplicated operands, add a copy.
- // Also add an copy if the source is live-in the block. We don't want
- // to end up with a partial-redef of a livein, e.g.
- // BB0:
- // reg1051:10<def> =
- // ...
- // BB1:
- // ... = reg1051:10
- // BB2:
- // reg1051:9<def> =
- // LiveIntervalAnalysis won't like it.
- //
- // If the REG_SEQUENCE doesn't kill its source, keeping live variables
- // correctly up to date becomes very difficult. Insert a copy.
-
- // Defer any kill flag to the last operand using SrcReg. Otherwise, we
- // might insert a COPY that uses SrcReg after is was killed.
- if (isKill)
- for (unsigned j = i + 2; j < e; j += 2)
- if (MI->getOperand(j).getReg() == SrcReg) {
- MI->getOperand(j).setIsKill();
- isKill = false;
- break;
- }
+ // Defer any kill flag to the last operand using SrcReg. Otherwise, we
+ // might insert a COPY that uses SrcReg after is was killed.
+ bool isKill = UseMO.isKill();
+ if (isKill)
+ for (unsigned j = i + 2; j < e; j += 2)
+ if (MI->getOperand(j).getReg() == SrcReg) {
+ MI->getOperand(j).setIsKill();
+ UseMO.setIsKill(false);
+ isKill = false;
+ break;
+ }