[PATCH] D151535: [X86] fold select to mask instructions.

[LuoYuanke via Phabricator via llvm-commits]

LuoYuanke created this revision.
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When avx512 is available the lhs operand of select instruction can be
folded with mask instruction, while the rhs operand can't. This patch is
to commute the lhs and rhs of the select instruction to create the
opportunity of folding.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D151535

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/X86/avx512f-vec-test-testn.ll
  llvm/test/CodeGen/X86/combine-rotates.ll
  llvm/test/CodeGen/X86/paddus.ll
  llvm/test/CodeGen/X86/sat-add.ll
  llvm/test/CodeGen/X86/vector-bo-select-avx512.ll
  llvm/test/CodeGen/X86/vector-bo-select.ll

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