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Eliminate the IS_PHI_DEF flag and VNInfo::setIsPHIDef().

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A value number is a PHI def if and only if it begins at a block
boundary. This can be derived from the def slot, a separate flag is not
necessary.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160893 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-07-27 21:11:14 +00:00
parent 3dfa38a5bf
commit b18d779b35
5 changed files with 6 additions and 18 deletions
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lib/CodeGen/SplitKit.cpp
+1 -2
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@@ -1047,8 +1047,7 @@ void SplitEditor::finish(SmallVectorImpl<unsigned> *LRMap) {
if (ParentVNI->isUnused())
continue;
unsigned RegIdx = RegAssign.lookup(ParentVNI->def);
VNInfo *VNI = defValue(RegIdx, ParentVNI, ParentVNI->def);
VNI->setIsPHIDef(ParentVNI->isPHIDef());
defValue(RegIdx, ParentVNI, ParentVNI->def);
// Force rematted values to be recomputed everywhere.
// The new live ranges may be truncated.