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.

llvm-svn: 223210

diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index a73c59b..83e19f4 100644 (file)
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -1194,8 +1194,6 @@ private:
     NewLoopID->replaceOperandWith(0, NewLoopID);
 
     TheLoop->setLoopID(NewLoopID);
-    if (LoopID)
-      LoopID->replaceAllUsesWith(NewLoopID);
     LoopID = NewLoopID;
   }