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Q.seenAllInterferences() must be called after Q.collectInterferingVRegs().

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llvm-svn: 121774
This commit is contained in:
Jakob Stoklund Olesen 2010-12-14 17:47:36 +00:00
parent 3f9b9dc852
commit 74ba8b77e6
1 changed files with 4 additions and 2 deletions
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6
lib/CodeGen/RegAllocGreedy.cpp
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@ -175,9 +175,9 @@ LiveInterval *RAGreedy::getSingleInterference(LiveInterval &VirtReg,
// Check direct interferences.
LiveIntervalUnion::Query &Q = query(VirtReg, PhysReg);
if (Q.checkInterference()) {
Q.collectInterferingVRegs(1);
if (!Q.seenAllInterferences())
return 0;
Q.collectInterferingVRegs(1);
Interference = Q.interferingVRegs().front();
}
@ -185,9 +185,11 @@ LiveInterval *RAGreedy::getSingleInterference(LiveInterval &VirtReg,
for (const unsigned *AliasI = TRI->getAliasSet(PhysReg); *AliasI; ++AliasI) {
LiveIntervalUnion::Query &Q = query(VirtReg, *AliasI);
if (Q.checkInterference()) {
if (Interference || !Q.seenAllInterferences())
if (Interference)
return 0;
Q.collectInterferingVRegs(1);
if (!Q.seenAllInterferences())
return 0;
Interference = Q.interferingVRegs().front();
}
}