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Commit e3280457 authored by Craig Topper's avatar Craig Topper
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[AVX-512][InstCombine] Teach InstCombine to converted masked vpermv intrinsics... 

[AVX-512][InstCombine] Teach InstCombine to converted masked vpermv intrinsics into shufflevector instructions

Summary:
This patch adds support for converting the masked vpermv intrinsics into shufflevector instructions if the indices are constants.

We also need to wrap a select instruction around the shuffle to take care of the masking part. InstCombine will take care of optimizing the select if the mask is constant so I didn't bother checking for that.

Reviewers: zvi, delena, spatel, RKSimon

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D27825

llvm-svn: 290530
parent c6b46d80
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