[PATCH] Remove all MMOs from memory operations when tail merging.

[hfinkel at anl.gov]

================
Comment at: lib/CodeGen/BranchFolding.cpp:745
@@ +744,3 @@
+    const Value *V2 = (*I2)->getValue();
+    if (!V1 || !V2 || (V1 != V2))
+      return false;
----------------
Yes, please check all of the fields (they can have control dependencies). Also, You can just do V1 != V2, both being null is fine.

http://reviews.llvm.org/D7769

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