[PATCH] [DAGCombine] Don't generate atrocious shuffles for constant vectors

[Simon Pilgrim]

Thanks Michael - see comment.


================
Comment at: test/CodeGen/X86/widen_shuffle-1.ll:92
@@ -91,2 +91,2 @@
   ret void
 }
----------------
This looks like its leaving a shuffle of a constant vector - shouldn't this be constant folded away?

http://reviews.llvm.org/D7093

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