Author: dpatel
Date: Mon Jul 30 15:23:45 2007
New Revision: 40604
URL: http://llvm.org/viewvc/llvm-project?rev=40604&view=rev
Log:
LCSSA preserves dom info.
Modified:
llvm/trunk/lib/Transforms/Utils/LCSSA.cpp
Modified: llvm/trunk/lib/Transforms/Utils/LCSSA.cpp
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Utils/LCSSA.cpp?rev=40604&r1=40603&r2=40604&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Utils/LCSSA.cpp (original)
+++ llvm/trunk/lib/Transforms/Utils/LCSSA.cpp Mon Jul 30 15:23:45 2007
@@ -73,6 +73,14 @@
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,
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