[PATCH] D52663: [X86][BtVer2] VPERM2F128rr instructions with Mask bits 3 and 7 are also zero-idioms.

[Andrea Di Biagio via Phabricator via llvm-commits]

andreadb created this revision.
andreadb added reviewers: RKSimon, spatel, craig.topper, mattd, courbet.
Herald added a subscriber: gbedwell.

This patch adds another variant class to identify zero-idiom VPERM2F128rr instructions.

On Jaguar, a VPERM wih bit 3 and 7 of the mask set, is a zero-idiom.

Please let me know if okay to commit.

Thanks,
Andrea


https://reviews.llvm.org/D52663

Files:
  lib/Target/X86/X86ScheduleBtVer2.td
  test/tools/llvm-mca/X86/BtVer2/zero-idioms-avx-256.s

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