[InstSimplify, InstCombine] add vector tests with undef elts; NFC

Description

[InstSimplify, InstCombine] add vector tests with undef elts; NFC

Details

Committed
spatelApr 22 2018, 7:19 AM
Parents
rL330542: [X86] Fix WriteMPSAD/WritePSADBW values to allow us to remove unnecessary…
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