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Fix a bug that occurs when the last instruction in a range is dead

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llvm-svn: 15005
This commit is contained in:
Chris Lattner 2004-07-19 15:16:53 +00:00
parent bc53c119ac
commit c07b7fff45
1 changed files with 6 additions and 3 deletions
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9
lib/CodeGen/LiveIntervals.cpp
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@ -205,12 +205,15 @@ std::vector<LiveInterval*> LiveIntervals::addIntervalsForSpills(
const TargetRegisterClass* rc = mf_->getSSARegMap()->getRegClass(li.reg);
for (LiveInterval::Ranges::const_iterator
i = li.ranges.begin(), e = li.ranges.end(); i != e; ++i) {
i = li.ranges.begin(), e = li.ranges.end(); i != e; ++i) {
unsigned index = getBaseIndex(i->first);
unsigned end = getBaseIndex(i->second-1) + InstrSlots::NUM;
for (; index < end; index += InstrSlots::NUM) {
for (; index != end; index += InstrSlots::NUM) {
// skip deleted instructions
while (!getInstructionFromIndex(index)) index += InstrSlots::NUM;
while (index != end && !getInstructionFromIndex(index))
index += InstrSlots::NUM;
if (index == end) break;
MachineBasicBlock::iterator mi = getInstructionFromIndex(index);
for_operand: