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Also compute interference intervals for blocks with no uses. 

When the live range is live through a block that doesn't use the register, but
that has interference, region splitting wants to split at the top and bottom of
the basic block.

llvm-svn: 124839
This commit is contained in:
Jakob Stoklund Olesen 2011-02-04 00:39:20 +00:00
parent 66d0f39904
commit b336c50c81
1 changed files with 1 additions and 3 deletions
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4
llvm/lib/CodeGen/RegAllocGreedy.cpp
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@ -611,9 +611,7 @@ void RAGreedy::splitAroundRegion(LiveInterval &VirtReg, unsigned PhysReg,
if (!IntI.valid())
continue;
for (unsigned i = 0, e = LiveBlocks.size(); i != e; ++i) {
BlockInfo &BI = LiveBlocks[i];
if (!BI.Uses)
continue;
const BlockInfo &BI = LiveBlocks[i];
IndexPair &IP = InterferenceRanges[i];
SlotIndex Start, Stop;
tie(Start, Stop) = Indexes->getMBBRange(BI.MBB);