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LoopSimplify preserves AA.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52053 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2008-06-06 17:50:58 +00:00
parent 8fb6a94b69
commit 4c37c07ee3
1 changed files with 5 additions and 3 deletions
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2
lib/Transforms/Utils/LoopSimplify.cpp
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@@ -73,6 +73,7 @@ namespace {
AU.addPreserved<LoopInfo>(); AU.addPreserved<LoopInfo>();
AU.addPreserved<DominatorTree>(); AU.addPreserved<DominatorTree>();
AU.addPreserved<DominanceFrontier>(); AU.addPreserved<DominanceFrontier>();
AU.addPreserved<AliasAnalysis>();
AU.addPreservedID(BreakCriticalEdgesID); // No critical edges added. AU.addPreservedID(BreakCriticalEdgesID); // No critical edges added.
} }
@@ -252,6 +253,7 @@ ReprocessLoop:
for (BasicBlock::iterator I = L->getHeader()->begin(); for (BasicBlock::iterator I = L->getHeader()->begin();
(PN = dyn_cast<PHINode>(I++)); ) (PN = dyn_cast<PHINode>(I++)); )
if (Value *V = PN->hasConstantValue()) { if (Value *V = PN->hasConstantValue()) {
if (AA) AA->deleteValue(PN);
PN->replaceAllUsesWith(V); PN->replaceAllUsesWith(V);
PN->eraseFromParent(); PN->eraseFromParent();
} }