[PATCH] D46073: [DagCombine] De Morgan laws: 'nand' logic with an inverted operand

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri updated this revision to Diff 144309.
lebedev.ri added a comment.

- Rebased ontop of revised tests.
- Handle `nor` pattern too.
- Still not sure how to handle `vandnpd`/`vandnps` breakage.


Repository:
  rL LLVM

https://reviews.llvm.org/D46073

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/AArch64/demorgan-extra.ll
  test/CodeGen/AArch64/unfold-masked-merge-scalar-variablemask.ll
  test/CodeGen/X86/avx-schedule.ll
  test/CodeGen/X86/demorgan-extra.ll
  test/CodeGen/X86/sse-schedule.ll
  test/CodeGen/X86/sse2-schedule.ll
  test/CodeGen/X86/unfold-masked-merge-scalar-variablemask.ll

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