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

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15005 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2004-07-19 15:16:53 +00:00
parent cc0d156f7b
commit 8640f4e666
1 changed files with 6 additions and 3 deletions
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7
lib/CodeGen/LiveIntervalAnalysis.cpp
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@@ -208,9 +208,12 @@ std::vector<LiveInterval*> LiveIntervals::addIntervalsForSpills(
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: