[all-commits] [llvm/llvm-project] 35bf12: [mlir][acc] Preserve section bounds on acc.reducti...

[Razvan Lupusoru via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 35bf12351740521f86fd406d01165e1c90b32ed8
      https://github.com/llvm/llvm-project/commit/35bf12351740521f86fd406d01165e1c90b32ed8
  Author: Razvan Lupusoru <razvan.lupusoru at gmail.com>
  Date:   2026-07-17 (Fri, 17 Jul 2026)

  Changed paths:
    M mlir/include/mlir/Dialect/OpenACC/OpenACCCGOps.td
    M mlir/lib/Dialect/OpenACC/Transforms/ACCRecipeMaterialization.cpp
    M mlir/test/Dialect/OpenACC/ops-cg.mlir

  Log Message:
  -----------
  [mlir][acc] Preserve section bounds on acc.reduction_init (#210443)

When `acc.reduction_init` is created from `acc.reduction`, its bounds
are lost because they only live as values folded into the init region's
body. Those bounds describe the legal indexing of the section: the
produced view of a (possibly base-adjusted, compact) reduction temporary
must be indexed with the same bounds as the original array.

Carry the acc.bounds as optional operands on acc.reduction_init so this
indexing information is directly available. The operands are optional,
so scalar/whole-array reductions and existing IR are unaffected.



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