MachineBasicBlock::iterator MachineBasicBlock::getFirstTerminator() {
iterator I = end();
- while (I != begin() && (--I)->getDesc().isTerminator())
+ while (I != begin() && ((--I)->getDesc().isTerminator() || I->isDebugValue()))
; /*noop */
- if (I != end() && !I->getDesc().isTerminator()) ++I;
+ while (I != end() && !I->getDesc().isTerminator())
+ ++I;
return I;
}
#ifndef NDEBUG
for (MachineBasicBlock::iterator TI = llvm::next(Term);
TI != opBlock.end(); ++TI) {
+ if (TI->isDebugValue())
+ continue;
assert(!TI->readsRegister(SrcReg) &&
"Terminator instructions cannot use virtual registers unless"
"they are the first terminator in a block!");
} else if (reusedIncoming || !IncomingReg) {
// We may have to rewind a bit if we didn't insert a copy this time.
KillInst = Term;
- while (KillInst != opBlock.begin())
- if ((--KillInst)->readsRegister(SrcReg))
+ while (KillInst != opBlock.begin()) {
+ --KillInst;
+ if (KillInst->isDebugValue())
+ continue;
+ if (KillInst->readsRegister(SrcReg))
break;
+ }
} else {
// We just inserted this copy.
KillInst = prior(InsertPos);