[all-commits] [llvm/llvm-project] ec406e: [GlobalISel] Add a GISelValueTracker printing pass...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ec406e86745af0a306870d3e4ce56325584f9b1e
      https://github.com/llvm/llvm-project/commit/ec406e86745af0a306870d3e4ce56325584f9b1e
  Author: David Green <david.green at arm.com>
  Date:   2025-05-14 (Wed, 14 May 2025)

  Changed paths:
    M llvm/docs/GlobalISel/KnownBits.rst
    M llvm/include/llvm/CodeGen/GlobalISel/GISelValueTracking.h
    M llvm/include/llvm/InitializePasses.h
    M llvm/include/llvm/Passes/MachinePassRegistry.def
    M llvm/lib/CodeGen/GlobalISel/GISelValueTracking.cpp
    M llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp
    M llvm/lib/CodeGen/GlobalISel/Legalizer.cpp
    M llvm/lib/Passes/CMakeLists.txt
    M llvm/lib/Passes/PassBuilder.cpp
    M llvm/lib/Target/AArch64/GISel/AArch64O0PreLegalizerCombiner.cpp
    M llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp
    M llvm/lib/Target/AArch64/GISel/AArch64PreLegalizerCombiner.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUPostLegalizerCombiner.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUPreLegalizerCombiner.cpp
    M llvm/lib/Target/AMDGPU/AMDGPURegBankCombiner.cpp
    M llvm/lib/Target/Mips/MipsPostLegalizerCombiner.cpp
    M llvm/lib/Target/Mips/MipsPreLegalizerCombiner.cpp
    M llvm/lib/Target/RISCV/GISel/RISCVO0PreLegalizerCombiner.cpp
    M llvm/lib/Target/RISCV/GISel/RISCVPostLegalizerCombiner.cpp
    M llvm/lib/Target/RISCV/GISel/RISCVPreLegalizerCombiner.cpp
    M llvm/lib/Target/SPIRV/SPIRVPreLegalizer.cpp
    M llvm/lib/Target/SPIRV/SPIRVPreLegalizerCombiner.cpp
    A llvm/test/CodeGen/AArch64/GlobalISel/knownbits-const.mir
    M llvm/unittests/CodeGen/GlobalISel/KnownBitsTest.cpp

  Log Message:
  -----------
  [GlobalISel] Add a GISelValueTracker printing pass (#139687)

This adds a GISelValueTrackingPrinterPass that can print the known bits
and sign bit of each def in a function. It is built on the new pass
manager and so adds a NPM GISelValueTrackingAnalysis, renaming the older
class to GISelValueTrackingAnalysisLegacy.

The first 2 functions from the AArch64GISelMITest are ported over to an
mir test to show it working. It also runs successfully on all files in
llvm/test/CodeGen/AArch64/GlobalISel/*.mir that are not invalid. It can
hopefully be used to test GlobalISel known bits analysis more directly
in common cases, without jumping through the hoops that the C++ tests
requires.



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