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LCSSA preserves dom info.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40604 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2007-07-30 20:23:45 +00:00
parent d9a6dcba9f
commit 81a129c0fb
1 changed files with 8 additions and 0 deletions
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8
lib/Transforms/Utils/LCSSA.cpp
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@ -73,6 +73,14 @@ namespace {
AU.addPreserved<LoopInfo>();
AU.addRequired<DominatorTree>();
AU.addPreserved<ScalarEvolution>();
AU.addPreserved<DominatorTree>();
// Request DominanceFrontier now, even though LCSSA does
// not use it. This allows Pass Manager to schedule Dominance
// Frontier early enough such that one LPPassManager can handle
// multiple loop transformation passes.
AU.addRequired<DominanceFrontier>();
AU.addPreserved<DominanceFrontier>();
}
private:
void getLoopValuesUsedOutsideLoop(Loop *L,