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Completely eliminate VNInfo flags.

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The 'unused' state of a value number can be represented as an invalid
def SlotIndex. This also exposed code that shouldn't have been looking
at unused value VNInfos.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161258 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-08-03 20:59:32 +00:00
parent 1599a64277
commit b2beac2b96
3 changed files with 8 additions and 32 deletions
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5
lib/CodeGen/LiveInterval.cpp
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@ -160,7 +160,7 @@ void LiveInterval::markValNoForDeletion(VNInfo *ValNo) {
valnos.pop_back();
} while (!valnos.empty() && valnos.back()->isUnused());
} else {
ValNo->setIsUnused(true);
ValNo->markUnused();
}
}
@ -667,9 +667,6 @@ VNInfo* LiveInterval::MergeValueNumberInto(VNInfo *V1, VNInfo *V2) {
}
}
// Merge the relevant flags.
V2->mergeFlags(V1);
// Now that V1 is dead, remove it.
markValNoForDeletion(V1);