[all-commits] [llvm/llvm-project] c3e705: clang/AMDGPU: Stop passing redundant -target-cpu t...

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/clang/driver-amdgpu-avoid-redundant-target-cpu
  Home:   https://github.com/llvm/llvm-project
  Commit: c3e705921a963f69e374af7df471acb1ad994e95
      https://github.com/llvm/llvm-project/commit/c3e705921a963f69e374af7df471acb1ad994e95
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-07-13 (Mon, 13 Jul 2026)

  Changed paths:
    M clang/lib/Basic/Targets/AMDGPU.cpp
    M clang/lib/Driver/ToolChains/CommonArgs.cpp
    M clang/test/CodeGenHIP/hip-cumode.hip
    M clang/test/Driver/amdgpu-hip-system-arch.c
    M clang/test/Driver/amdgpu-macros.cl
    M clang/test/Driver/amdgpu-mcpu.cl
    M clang/test/Driver/amdgpu-openmp-sanitize-options.c
    M clang/test/Driver/amdgpu-openmp-toolchain.c
    M clang/test/Driver/amdgpu-xnack-sramecc-flags.c
    M clang/test/Driver/cuda-flush-denormals-to-zero.cu
    M clang/test/Driver/hip-cuid-hash.hip
    M clang/test/Driver/hip-cuid.hip
    M clang/test/Driver/hip-default-gpu-arch.hip
    M clang/test/Driver/hip-device-compile.hip
    M clang/test/Driver/hip-gsplit-dwarf-options.hip
    M clang/test/Driver/hip-macros.hip
    M clang/test/Driver/hip-offload-arch.hip
    M clang/test/Driver/hip-rdc-device-only.hip
    M clang/test/Driver/hip-sanitize-options.hip
    M clang/test/Driver/hip-save-temps.hip
    M clang/test/Driver/hip-target-id.hip
    M clang/test/Driver/hip-toolchain-device-only.hip
    M clang/test/Driver/hip-toolchain-mllvm.hip
    M clang/test/Driver/hip-toolchain-no-rdc.hip
    M clang/test/Driver/hip-toolchain-rdc-separate.hip
    M clang/test/Driver/hip-toolchain-rdc-static-lib.hip
    M clang/test/Driver/hip-toolchain-rdc.hip
    M clang/test/Driver/hip-unbundle-preproc.hipi
    M clang/test/Driver/hip-wavefront-size.hip
    M clang/test/Driver/openmp-offload-infer.c
    M clang/test/Driver/openmp-system-arch.c
    M clang/test/Driver/target-id.cl
    A clang/test/Preprocessor/amdgpu-subarch-cc1-target-cpu.cl

  Log Message:
  -----------
  clang/AMDGPU: Stop passing redundant -target-cpu to cc1

Now that the exact target is encoded in the triple's subarch field,
-target-cpu is redundant. This avoids polluting the resultant IR with
unwanted "target-cpu" attributes. The net result is the desired codegen
when compiling libraries for a major subarch and linking it into a
program compiled for a specific arch. e.g., compiling for "gfx9-generic"
would pollute the IR with "target-cpu"="gfx9-generic", so codegen
would ultimately be performed for the generic target even after
linking into the concrete gfx9 cpu. The specialization will now be
achieved by merging the triples without the linker or optimization
passes needing to fixup function attributes.



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