[all-commits] [llvm/llvm-project] 7c8b12: [SPIR-V] Add pass to remove spv_ptrcast intrinsics...

[Nathan Gauër via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7c8b1275bc87f6b5983788a6e603504725b490c9
      https://github.com/llvm/llvm-project/commit/7c8b1275bc87f6b5983788a6e603504725b490c9
  Author: Nathan Gauër <brioche at google.com>
  Date:   2025-03-04 (Tue, 04 Mar 2025)

  Changed paths:
    M llvm/lib/Target/SPIRV/CMakeLists.txt
    M llvm/lib/Target/SPIRV/SPIRV.h
    M llvm/lib/Target/SPIRV/SPIRVEmitIntrinsics.cpp
    M llvm/lib/Target/SPIRV/SPIRVGlobalRegistry.cpp
    M llvm/lib/Target/SPIRV/SPIRVGlobalRegistry.h
    A llvm/lib/Target/SPIRV/SPIRVLegalizePointerCast.cpp
    M llvm/lib/Target/SPIRV/SPIRVTargetMachine.cpp
    M llvm/lib/Target/SPIRV/SPIRVUtils.cpp
    M llvm/lib/Target/SPIRV/SPIRVUtils.h
    A llvm/test/CodeGen/SPIRV/pointers/array-skips-gep.ll
    A llvm/test/CodeGen/SPIRV/pointers/getelementptr-downcast-vector.ll

  Log Message:
  -----------
  [SPIR-V] Add pass to remove spv_ptrcast intrinsics (#128896)

OpenCL is allowed to cast pointers, meaning they can resolve some type
mismatches this way. In logical SPIR-V, those are restricted. This new
pass legalizes such pointer cast when targeting logical SPIR-V.

For now, this pass supports 3 cases we witnessed:
 - loading a vec3 from a vec4*.
 - loading a scalar from a vec*.
 - loading the 1st element of an array.

---------

Co-authored-by: Steven Perron <stevenperron at google.com>



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