[PATCH] [CodeGenPrepare] Move extractelement close to store if they can be combined.

[hfinkel at anl.gov]

================
Comment at: lib/CodeGen/CodeGenPrepare.cpp:3387
@@ +3386,3 @@
+      NewVal =
+          ConstantInt::get(TransitionTy, cast<ConstantInt>(Val)->getValue());
+    else
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Not withstanding my previous comment on division, we could really put more undefs in this vector instead of always using a splat.

http://reviews.llvm.org/D5921