for (MachineBasicBlock::iterator mii = mbbi->begin(),
mie = mbbi->end(); mii != mie; ++mii) {
if (mii->isDebugValue())
- OS << SlotIndex::getEmptyKey() << '\t' << *mii;
+ OS << " \t" << *mii;
else
OS << getInstructionIndex(mii) << '\t' << *mii;
}
// Look for kills, if it reaches a def before it's killed, then it shouldn't
// be considered a livein.
MachineBasicBlock::iterator mi = MBB->begin();
+ MachineBasicBlock::iterator E = MBB->end();
+ // Skip over DBG_VALUE at the start of the MBB.
+ if (mi != E && mi->isDebugValue()) {
+ while (++mi != E && mi->isDebugValue())
+ ;
+ if (mi == E)
+ // MBB is empty except for DBG_VALUE's.
+ return;
+ }
+
SlotIndex baseIndex = MIIdx;
SlotIndex start = baseIndex;
if (getInstructionFromIndex(baseIndex) == 0)
SlotIndex end = baseIndex;
bool SeenDefUse = false;
- MachineBasicBlock::iterator E = MBB->end();
while (mi != E) {
- while (mi != E && mi->isDebugValue())
- ++mi;
- if (mi == E)
- break;
if (mi->killsRegister(interval.reg, tri_)) {
DEBUG(dbgs() << " killed");
end = baseIndex.getDefIndex();
break;
}
- ++mi;
- if (mi != E && !mi->isDebugValue()) {
+ while (++mi != E && mi->isDebugValue())
+ // Skip over DBG_VALUE.
+ ;
+ if (mi != E)
baseIndex = indexes_->getNextNonNullIndex(baseIndex);
- }
}
// Live-in register might not be used at all.