tm_ = &fn.getTarget();
mri_ = tm_->getRegisterInfo();
li_ = &getAnalysis<LiveIntervals>();
+
if (!prt_.get()) prt_.reset(new PhysRegTracker(*mri_));
vrm_.reset(new VirtRegMap(*mf_));
if (!spiller_.get()) spiller_.reset(createSpiller());
for (unsigned i = 0, e = fixed_.size(); i != e; ++i) {
IntervalPtr &IP = fixed_[i];
LiveInterval *I = IP.first;
- LiveInterval::iterator II = I->advanceTo(IP.second, StartPosition);
- IP.second = II;
- if (cur->overlapsFrom(*I, II)) {
- unsigned reg = I->reg;
- prt_->addRegUse(reg);
- updateSpillWeights(reg, I->weight);
+ if (I->endNumber() > StartPosition) {
+ LiveInterval::iterator II = I->advanceTo(IP.second, StartPosition);
+ IP.second = II;
+ if (II != I->begin() && II->start > StartPosition)
+ --II;
+ if (cur->overlapsFrom(*I, II)) {
+ unsigned reg = I->reg;
+ prt_->addRegUse(reg);
+ updateSpillWeights(reg, I->weight);
+ }
}
}