[llvm] r223210 - LoopVectorize: Remove unnecessary RAUW

[Duncan P. N. Exon Smith]

Author: dexonsmith
Date: Tue Dec  2 23:41:20 2014
New Revision: 223210

URL: http://llvm.org/viewvc/llvm-project?rev=223210&view=rev
Log:
LoopVectorize: Remove unnecessary RAUW

Remove an unnecessary `MDNode::replaceAllUsesWith()`.  In the preceding
line, `TheLoop->setLoopID()` visits all backedges and sets the new loop
ID.  This sufficiently updates the loop metadata.

Metadata RAUW is going away as part of PR21532.

Modified:
    llvm/trunk/lib/Transforms/Vectorize/LoopVectorize.cpp

Modified: llvm/trunk/lib/Transforms/Vectorize/LoopVectorize.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Vectorize/LoopVectorize.cpp?rev=223210&r1=223209&r2=223210&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Vectorize/LoopVectorize.cpp (original)
+++ llvm/trunk/lib/Transforms/Vectorize/LoopVectorize.cpp Tue Dec  2 23:41:20 2014
@@ -1194,8 +1194,6 @@ private:
     NewLoopID->replaceOperandWith(0, NewLoopID);
 
     TheLoop->setLoopID(NewLoopID);
-    if (LoopID)
-      LoopID->replaceAllUsesWith(NewLoopID);
     LoopID = NewLoopID;
   }