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Revert r135121 which broke a gcc-4.2 builder.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135122 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-07-14 00:58:38 +00:00
parent 6a9feaac93
commit 4fcfcf4984
3 changed files with 11 additions and 70 deletions
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21
lib/CodeGen/RegAllocGreedy.cpp
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@ -854,6 +854,11 @@ void RAGreedy::splitAroundRegion(LiveInterval &VirtReg,
});
InterferenceCache::Cursor &Intf = Cand.Intf;
// FIXME: We need cache reference counts to guarantee that Intf hasn't been
// clobbered.
Intf.setPhysReg(IntfCache, Cand.PhysReg);
LiveRangeEdit LREdit(VirtReg, NewVRegs, this);
SE->reset(LREdit);
@ -1247,22 +1252,6 @@ unsigned RAGreedy::tryRegionSplit(LiveInterval &VirtReg, AllocationOrder &Order,
Order.rewind();
while (unsigned PhysReg = Order.next()) {
// Discard bad candidates before we run out of interference cache cursors.
// This will only affect register classes with a lot of registers (>32).
if (NumCands == IntfCache.getMaxCursors()) {
unsigned WorstCount = ~0u;
unsigned Worst = 0;
for (unsigned i = 0; i != NumCands; ++i) {
if (i == BestCand)
continue;
unsigned Count = GlobalCand[i].LiveBundles.count();
if (Count < WorstCount)
Worst = i, WorstCount = Count;
}
--NumCands;
GlobalCand[Worst] = GlobalCand[NumCands];
}
if (GlobalCand.size() <= NumCands)
GlobalCand.resize(NumCands+1);
GlobalSplitCandidate &Cand = GlobalCand[NumCands];