Merging r323672: (test-case re-generated)

Merging r323672: (test-case re-generated)
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r323672 | ctopper | 2018-01-29 18:56:57 +0100 (Mon, 29 Jan 2018) | 5 lines

[X86] Don't create SHRUNKBLEND when the condition is used by the true or false operand of the vselect.

Fixes PR34592.

Differential Revision: https://reviews.llvm.org/D42628
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_60@323743 91177308-0d34-0410-b5e6-96231b3b80d8