[all-commits] [llvm/llvm-project] 3f2ed8: [InstCombine] Infer nneg on zext when forming from...

Philip Reames via All-commits all-commits at lists.llvm.org
Mon Oct 30 12:09:56 PDT 2023


  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3f2ed812f021e723212ddb9f808757a7ec3841e1
      https://github.com/llvm/llvm-project/commit/3f2ed812f021e723212ddb9f808757a7ec3841e1
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2023-10-30 (Mon, 30 Oct 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp
    M llvm/test/Transforms/InstCombine/adjust-for-minmax.ll
    M llvm/test/Transforms/InstCombine/cast-mul-select.ll
    M llvm/test/Transforms/InstCombine/icmp-ext-ext.ll
    M llvm/test/Transforms/InstCombine/memcpy-from-global.ll
    M llvm/test/Transforms/InstCombine/minmax-intrinsics.ll
    M llvm/test/Transforms/InstCombine/narrow-math.ll
    M llvm/test/Transforms/InstCombine/select_meta.ll
    M llvm/test/Transforms/InstCombine/sext.ll
    M llvm/test/Transforms/InstCombine/udiv-simplify.ll
    M llvm/test/Transforms/InstCombine/wcslen-1.ll
    M llvm/test/Transforms/InstCombine/wcslen-3.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-interleaved-masked-accesses.ll
    M llvm/test/Transforms/LoopVectorize/induction.ll
    M llvm/test/Transforms/PhaseOrdering/gvn-replacement-vs-hoist.ll
    M llvm/test/Transforms/PhaseOrdering/lto-licm.ll
    M llvm/test/Transforms/SLPVectorizer/AArch64/getelementptr.ll
    M llvm/test/Transforms/SimpleLoopUnswitch/AMDGPU/uniform-unswitch.ll

  Log Message:
  -----------
  [InstCombine] Infer nneg on zext when forming from non-negative sext (#70706)

Builds on #67982 which recently introduced the nneg flag on a zext
instruction. InstCombine is one of our largest canonicalizers of zext
from non-negative sext instructions, so set the flag there.




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