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Move more fragments of spill weight calculation into CalcSpillWeights.h

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Simplify the spill weight calculation a bit by bypassing
getApproximateInstructionCount() and using LiveInterval::getSize() directly.
This changes the computed spill weights, but only by a constant factor in each
function. It should not affect how spill weights compare against each other, and
so it shouldn't affect code generation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125530 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-02-14 23:15:38 +00:00
parent 3fc178ffda
commit eb9f040f0d
4 changed files with 25 additions and 16 deletions
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lib/CodeGen/CalcSpillWeights.cpp
+1 -2
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@@ -174,8 +174,7 @@ void VirtRegAuxInfo::CalculateWeightAndHint(LiveInterval &li) {
totalWeight *= 0.5F;
}
li.weight = totalWeight;
lis_.normalizeSpillWeight(li);
li.weight = normalizeSpillWeight(totalWeight, li.getSize());
}
void VirtRegAuxInfo::CalculateRegClass(unsigned reg) {