[PATCH] Propagate instruction metadata during SLP vectorization.

[Nadav Rotem]

================
Comment at: lib/Transforms/Vectorize/SLPVectorizer.cpp:1512
@@ -1480,2 +1511,3 @@
       E->VectorizedValue = V;
-      return V;
+
+      Instruction *I = dyn_cast<Instruction>(V);
----------------
The idiom that we use is:

if (Instruction *I = den_cast<Instruction>(V))
   return prop(I);

return V; 


http://llvm-reviews.chandlerc.com/D2191