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Rewrite loop to suit Chris' preference. 

llvm-svn: 95749
This commit is contained in:
Dale Johannesen 2010-02-10 01:31:26 +00:00
parent ea26fa9971
commit f8b0e44584
1 changed files with 19 additions and 16 deletions
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35
llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -611,23 +611,26 @@ void LiveIntervals::handleLiveInRegister(MachineBasicBlock *MBB,
MachineBasicBlock::iterator E = MBB->end();
while (mi != E) {
if (!mi->isDebugValue()) {
if (mi->killsRegister(interval.reg, tri_)) {
DEBUG(dbgs() << " killed");
end = baseIndex.getDefIndex();
SeenDefUse = true;
break;
} else if (mi->modifiesRegister(interval.reg, tri_)) {
// Another instruction redefines the register before it is ever read.
// Then the register is essentially dead at the instruction that defines
// it. Hence its interval is:
// [defSlot(def), defSlot(def)+1)
DEBUG(dbgs() << " dead");
end = start.getStoreIndex();
SeenDefUse = true;
break;
}
if (mi->isDebugValue()) {
++mi;
continue;
}
if (mi->killsRegister(interval.reg, tri_)) {
DEBUG(dbgs() << " killed");
end = baseIndex.getDefIndex();
SeenDefUse = true;
break;
} else if (mi->modifiesRegister(interval.reg, tri_)) {
// Another instruction redefines the register before it is ever read.
// Then the register is essentially dead at the instruction that defines
// it. Hence its interval is:
// [defSlot(def), defSlot(def)+1)
DEBUG(dbgs() << " dead");
end = start.getStoreIndex();
SeenDefUse = true;
break;
}
++mi;
if (mi != E && !mi->isDebugValue()) {
baseIndex = indexes_->getNextNonNullIndex(baseIndex);