[all-commits] [llvm/llvm-project] eddeb3: [SPIRV] add pre legalization instruction combine (...

[Farzon Lotfi via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: eddeb36cf1ced0e14e17ac90f60922366e382100
      https://github.com/llvm/llvm-project/commit/eddeb36cf1ced0e14e17ac90f60922366e382100
  Author: Farzon Lotfi <farzonlotfi at microsoft.com>
  Date:   2025-01-17 (Fri, 17 Jan 2025)

  Changed paths:
    M clang/include/clang/Basic/BuiltinsSPIRV.td
    M clang/lib/CodeGen/CGBuiltin.cpp
    M clang/lib/Headers/hlsl/hlsl_detail.h
    M clang/lib/Sema/SemaSPIRV.cpp
    M clang/test/CodeGenHLSL/builtins/distance.hlsl
    M clang/test/CodeGenHLSL/builtins/length.hlsl
    A clang/test/CodeGenSPIRV/Builtins/length.c
    A clang/test/SemaSPIRV/BuiltIns/length-errors.c
    M llvm/lib/Target/SPIRV/CMakeLists.txt
    M llvm/lib/Target/SPIRV/SPIRV.h
    M llvm/lib/Target/SPIRV/SPIRV.td
    A llvm/lib/Target/SPIRV/SPIRVCombine.td
    M llvm/lib/Target/SPIRV/SPIRVPreLegalizer.cpp
    A llvm/lib/Target/SPIRV/SPIRVPreLegalizerCombiner.cpp
    M llvm/lib/Target/SPIRV/SPIRVTargetMachine.cpp
    A llvm/test/CodeGen/SPIRV/GlobalISel/InstCombine/prelegalizercombiner-length-to-distance.mir
    M llvm/test/CodeGen/SPIRV/hlsl-intrinsics/distance.ll
    M llvm/test/CodeGen/SPIRV/opencl/distance.ll

  Log Message:
  -----------
  [SPIRV] add pre legalization instruction combine (#122839)

- Add the boilerplate to support instcombine in SPIRV
- instcombine length(X-Y) to distance(X,Y)
- switch HLSL's distance intrinsic to not special case for SPIRV.
- fixes #122766
- This RFC we were requested to add in the infra for pattern matching:
https://discourse.llvm.org/t/rfc-add-targetbuiltins-for-spirv-to-support-hlsl/83329/13



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