[all-commits] [llvm/llvm-project] ab9521: [Hexagon] Use 'vnot' instead of 'not' in patterns ...

[Krzysztof Parzyszek via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ab9521aaebc51de677741343184da768ee596c08
      https://github.com/llvm/llvm-project/commit/ab9521aaebc51de677741343184da768ee596c08
  Author: Krzysztof Parzyszek <kparzysz at quicinc.com>
  Date:   2021-04-22 (Thu, 22 Apr 2021)

  Changed paths:
    M llvm/lib/Target/Hexagon/HexagonPatterns.td
    M llvm/lib/Target/Hexagon/HexagonPatternsHVX.td
    A llvm/test/CodeGen/Hexagon/autohvx/logical-128b.ll
    A llvm/test/CodeGen/Hexagon/autohvx/logical-64b.ll
    A llvm/test/CodeGen/Hexagon/isel/logical.ll

  Log Message:
  -----------
  [Hexagon] Use 'vnot' instead of 'not' in patterns with vectors

'not' expands to checking for an xor with a -1 constant. Since
this looks for a ConstantSDNode it will never match for a vector.

Co-authored-by: Craig Topper <craig.topper at sifive.com>

Differential Revision: https://reviews.llvm.org/D100687