[PATCH] D36601: [x86] Enable some support for lowerVectorShuffleWithUndefHalf with AVX-512

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon accepted this revision.
RKSimon added a comment.
This revision is now accepted and ready to land.

LGTM



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Comment at: lib/Target/X86/X86ISelLowering.cpp:12259
 
 /// Lower shuffles where an entire half of a 256-bit vector is UNDEF.
 /// This allows for fast cases such as subvector extraction/insertion
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256 or 512-bit vector


https://reviews.llvm.org/D36601