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{
  "commit": "aefe97b939f6884b9ffb48f602b9cee6f867f115",
  "tree": "ff057a2595953c1e1f5466cc6dcc3366f74f8fa9",
  "parents": [
    "cff4b04858d8207a5c94f113bbf99407a1322db7"
  ],
  "author": {
    "name": "Ben Vanik",
    "email": "ben.vanik@gmail.com",
    "time": "Fri May 15 15:12:30 2026 -0700"
  },
  "committer": {
    "name": "GitHub",
    "email": "noreply@github.com",
    "time": "Fri May 15 15:12:30 2026 -0700"
  },
  "message": "[AMDGPU] Embed prebuilt AMDGPU device binaries (#24498)\n\nThe AMDGPU HAL runtime needs a small builtin device library for blit,\ndispatch, and timestamp kernels. Building that library through the\nnormal runtime target required an AMDGPU-capable clang from the\nthird_party LLVM checkout, making accidental runtime rebuilds extremely\nexpensive and tying the runtime to the monorepo compiler checkout.\n\nThis adds a device/binaries package that embeds checked-in HSACO code\nobjects for the default generic support set: gfx9-generic, gfx90a,\ngfx9-4-generic, gfx10-1-generic, gfx10-3-generic, gfx11-generic, and\ngfx12-generic. Default builds consume those blobs and do not require\nROCm or LLVM producer tools.\n\nDefault/prebuilt scenarios:\n```\n  iree-bazel-build //runtime/src/iree/hal/drivers/amdgpu/device/binaries:toc\n\n  cmake -DIREE_HAL_AMDGPU_DEVICE_BINARY_BUILD_MODE\u003dprebuilt ...\n```\n\nLive source-build scenarios for HAL developers:\n```\n  iree-bazel-build \\\n      --config\u003damdgpu_device_binaries_source_rocm \\\n      --repo_env\u003dIREE_HAL_AMDGPU_DEVICE_TOOLCHAIN_ROCM_PATH\u003d/path/to/rocm \\\n      //runtime/src/iree/hal/drivers/amdgpu/device/binaries:toc\n\n  iree-bazel-build \\\n      --config\u003damdgpu_device_binaries_source_llvm_project \\\n      //runtime/src/iree/hal/drivers/amdgpu/device/binaries:toc\n\n  cmake \\\n      -DIREE_HAL_AMDGPU_DEVICE_BINARY_BUILD_MODE\u003dsource \\\n      -DIREE_HAL_AMDGPU_DEVICE_TOOLCHAIN\u003drocm \\\n      -DIREE_HAL_AMDGPU_DEVICE_TOOLCHAIN_ROCM_PATH\u003d/path/to/rocm ...\n```\n\nRegenerating the checked-in set is explicit:\n```\n  python build_tools/scripts/amdgpu_device_binaries.py \\\n    --output-dir runtime/src/iree/hal/drivers/amdgpu/device/binaries/prebuilt \\\n    --rocm-path /path/to/rocm \\\n    --targets gfx9-generic,gfx90a,gfx9-4-generic,gfx10-1-generic,gfx10-3-generic,gfx11-generic,gfx12-generic\n```\n\nThe target map is authored once in Python and generates the Bazel,\nCMake, and runtime lookup fragments. That keeps the ROCm/TheRock family\nvocabulary, exact target map, and generic code-object fallback table\naligned without adding a manifest whose inventory, history, and hashes\nwould duplicate Git.\n\nThe pragmatic tradeoff is accepting checked-in binaries for code that\nchanges rarely. The current seven HSACO files are about 151 KiB raw,\nabout 40 KiB as loose Git blobs, and about 27 KiB in a Git pack, so the\nrepository cost is a few tens of KiB instead of a mandatory LLVM/ROCm\ndependency on every runtime build.\n\nThis does not add general AMDGPU fatbin support. The builtin runtime\nlibrary now has a TOC of target-specific blobs and runtime selection;\nCTS, samples, and other normal HAL executables still use the existing\nROCm test target plumbing until the AMDGPU executable format grows real\nmulti-variant support.",
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