[llvm-commits] [llvm] r52053 - /llvm/trunk/lib/Transforms/Utils/LoopSimplify.cpp

[Devang Patel]

Author: dpatel
Date: Fri Jun  6 12:50:58 2008
New Revision: 52053

URL: http://llvm.org/viewvc/llvm-project?rev=52053&view=rev
Log:
LoopSimplify preserves AA.

Modified:
    llvm/trunk/lib/Transforms/Utils/LoopSimplify.cpp

Modified: llvm/trunk/lib/Transforms/Utils/LoopSimplify.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Utils/LoopSimplify.cpp?rev=52053&r1=52052&r2=52053&view=diff

==============================================================================
--- llvm/trunk/lib/Transforms/Utils/LoopSimplify.cpp (original)
+++ llvm/trunk/lib/Transforms/Utils/LoopSimplify.cpp Fri Jun  6 12:50:58 2008
@@ -73,6 +73,7 @@
       AU.addPreserved<LoopInfo>();
       AU.addPreserved<DominatorTree>();
       AU.addPreserved<DominanceFrontier>();
+      AU.addPreserved<AliasAnalysis>();
       AU.addPreservedID(BreakCriticalEdgesID);  // No critical edges added.
     }
 
@@ -252,9 +253,10 @@
   for (BasicBlock::iterator I = L->getHeader()->begin();
        (PN = dyn_cast<PHINode>(I++)); )
     if (Value *V = PN->hasConstantValue()) {
-        PN->replaceAllUsesWith(V);
-        PN->eraseFromParent();
-      }
+      if (AA) AA->deleteValue(PN);
+      PN->replaceAllUsesWith(V);
+      PN->eraseFromParent();
+    }
 
   return Changed;
 }