[llvm-commits] [llvm] r119692 - /llvm/trunk/lib/Transforms/Scalar/MemCpyOptimizer.cpp

[Chris Lattner]

Author: lattner
Date: Thu Nov 18 01:39:57 2010
New Revision: 119692

URL: http://llvm.org/viewvc/llvm-project?rev=119692&view=rev
Log:
remove another pointless noalias check: M is a memcpy, so the
source and dest are known to not overlap.

Modified:
    llvm/trunk/lib/Transforms/Scalar/MemCpyOptimizer.cpp

Modified: llvm/trunk/lib/Transforms/Scalar/MemCpyOptimizer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/MemCpyOptimizer.cpp?rev=119692&r1=119691&r2=119692&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/MemCpyOptimizer.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/MemCpyOptimizer.cpp Thu Nov 18 01:39:57 2010
@@ -691,8 +691,7 @@
   // Finally, we have to make sure that the dest of the second does not
   // alias the source of the first.
   AliasAnalysis &AA = getAnalysis<AliasAnalysis>();
-  if (!AA.isNoAlias(M->getRawDest(), MSize, MDep->getRawSource(), DepSize) ||
-      !AA.isNoAlias(M->getRawDest(), MSize, M->getRawSource(), MSize))
+  if (!AA.isNoAlias(M->getRawDest(), MSize, MDep->getRawSource(), DepSize))
     return false;
   
   // If all checks passed, then we can transform these memcpy's