regression from commit r206045

Sun Apr 13 23:06:14 PDT 2014

We have several test-suite failures after this commit.

bisected to:

commit fb33ce9956e10d74031b54fdaf4e341c64ca6de1
Author: Matt Arsenault <Matthew.Arsenault at amd.com<mailto:Matthew.Arsenault at amd.com>>
Date:   Fri Apr 11 17:57:53 2014 +0000

    Fix shift by constants for vector.

    ashr <N x iM>, <N x iM> M -> undef

    git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206045 91177308-0d\
34-0410-b5e6-96231b3b80d8

Failures are:

SingleSource/Benchmarks/CoyoteBench/fftbench
SingleSource/Benchmarks/Misc-C++/oopack_v1p8
SingleSource/Benchmarks/Misc/mandel-2

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