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{
  "commit": "2b9e47749ca1eb337ea26b8084dad52732dc7186",
  "tree": "94c9b584e882d9663506d9f6810cb70aaf7c4ca3",
  "parents": [
    "51ef9302a6f79bbacb9cf49c52c2990d845eb57c"
  ],
  "author": {
    "name": "Jianhui Li",
    "email": "jian.hui.li@intel.com",
    "time": "Wed Dec 17 12:04:58 2025 -0800"
  },
  "committer": {
    "name": "GitHub",
    "email": "noreply@github.com",
    "time": "Wed Dec 17 12:04:58 2025 -0800"
  },
  "message": "[MLIR][XeGPU] Refactor Layout access interface  (#172125)\n\nThis PR builds on the anchor layout mechanism introduced in\nhttps://github.com/llvm/llvm-project/pull/169267 and performs the\nfollowing refactoring:\n\n1. Introduce getAnchorLayout() and setAnchorLayout() interface for\nanchor ops to get and set layout attributes.\n\n2. Add getLocalLayout() and setLocalLayout() utility functions, and\nrefactor workgroup/subgroup distribution patterns to use these APIs.\nThese utilities access the layout information directly and locally,\nwithout relying on global propagation.\n\n3. Introduce localPropagateLayoutsFromAnchor(), a utility used by\nsubgroup distribution to unify non-anchor layout setup.\nThis function is intended to be invoked upfront by all layout-based\npasses (including workgroup/subgroup distribution and unrolling) to\npropagate layouts from anchor ops to non-anchor ops.\nAfter this step, patterns within the pass should exclusively use\ngetLocalLayout() / setLocalLayout().\n\n4. Refactor getDistributeLayoutAttr() and setDistributeLayoutAttr() to\nremove special-case handling. These APIs now operate in a uniform order:\nanchor ops first, then non-anchor ops, and finally block arguments.\nThese APIs will be deprecated on long run. \n\n5. Refactor patterns in wg/sg distribution, load optimization passes to\nuse get/setAnchorLayout() and get/setLocalLayout().\n\n6. Update test cases to enforce that anchor ops must use—and only\nuse—anchor layouts.",
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