[all-commits] [llvm/llvm-project] d012e0: [GISel] Use GISelValueTracking in isKnownNeverNaN ...

[Tim Gymnich via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d012e0380a8f1e16b2720d98b96197084f2e1207
      https://github.com/llvm/llvm-project/commit/d012e0380a8f1e16b2720d98b96197084f2e1207
  Author: Tim Gymnich <tim at gymni.ch>
  Date:   2026-04-13 (Mon, 13 Apr 2026)

  Changed paths:
    M llvm/include/llvm/CodeGen/GlobalISel/GISelValueTracking.h
    M llvm/include/llvm/CodeGen/GlobalISel/MIPatternMatch.h
    M llvm/include/llvm/CodeGen/GlobalISel/Utils.h
    M llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
    M llvm/lib/CodeGen/GlobalISel/GISelValueTracking.cpp
    M llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
    M llvm/lib/CodeGen/GlobalISel/Utils.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
    M llvm/lib/Target/AMDGPU/AMDGPURegBankCombiner.cpp
    M llvm/test/CodeGen/AArch64/known-never-nan.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/clamp-minmax-const-combine.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/fmed3-min-max-const-combine.ll
    A llvm/test/CodeGen/AMDGPU/GlobalISel/known-fpclass-phi.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-fmaxnum.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-fminnum.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/regbankcombiner-clamp-minmax-const.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/regbankcombiner-fmed3-minmax-const.mir
    M llvm/test/CodeGen/AMDGPU/fmed3.ll
    M llvm/unittests/CodeGen/GlobalISel/KnownFPClassTest.cpp

  Log Message:
  -----------
  [GISel] Use GISelValueTracking in isKnownNeverNaN (#190542)

Pass GISelValueTracking* through isKnownNeverNaN and isKnownNeverSNaN so
that the implementation can call computeKnownFPClass to derive NaN
information from value tracking, rather than only looking at flags and
direct constant definitions. Update all callers.

Co-Authored-By: Claude Sonnet 4.6 <noreply at anthropic.com>



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