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Fix PHI handling in LiveIntervals::shrinkToUses(). 

We need to wait until we meet a PHIDef in its defining block before resurrecting
PHIKills in the predecessors.

This should unbreak the llvm-gcc-build-x86_64-darwin10-x-mingw32-x-armeabi bot.

llvm-svn: 126905
This commit is contained in:
Jakob Stoklund Olesen 2011-03-03 00:20:51 +00:00
parent edc103e253
commit d58c8d12ab
1 changed files with 1 additions and 1 deletions
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2
llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -797,7 +797,7 @@ void LiveIntervals::shrinkToUses(LiveInterval *li) {
(void)ExtVNI;
assert(ExtVNI == VNI && "Unexpected existing value number");
// Is this a PHIDef we haven't seen before?
if (!VNI->isPHIDef() || !UsedPHIs.insert(VNI))
if (!VNI->isPHIDef() || VNI->def != BlockStart || !UsedPHIs.insert(VNI))
continue;
// The PHI is live, make sure the predecessors are live-out.
for (MachineBasicBlock::const_pred_iterator PI = MBB->pred_begin(),