[PATCH] D114314: [X86][TTI] Costmodel for AVX512DQ's VPMOVM2[DQ] / VPMOV[DQ]2M instructions

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri created this revision.
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Much like the VPMOVM2[BW] / VPMOV[BW]2M from AVX512BW,
these either sign-extent the mask register into a vector,
or pack the mask from vector register.

Apparently, we didn't even have MCA tests for these,
added in rG2f364f6f0d3a2420ca78cbd80abb186657180e05 <https://reviews.llvm.org/rG2f364f6f0d3a2420ca78cbd80abb186657180e05>,
so i'm just guessing that their perf characteristics
are optimal.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D114314

Files:
  llvm/lib/Target/X86/X86TargetTransformInfo.cpp
  llvm/test/Analysis/CostModel/X86/cast.ll
  llvm/test/Analysis/CostModel/X86/extend.ll
  llvm/test/Analysis/CostModel/X86/min-legal-vector-width.ll
  llvm/test/Analysis/CostModel/X86/trunc.ll

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