[all-commits] [llvm/llvm-project] 660030: [mlir][llvm] Improve access group import handling.

[Tobias Gysi via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6600301c2fbfa3ed3619b62d46edee148cda85b1
      https://github.com/llvm/llvm-project/commit/6600301c2fbfa3ed3619b62d46edee148cda85b1
  Author: Tobias Gysi <tobias.gysi at nextsilicon.com>
  Date:   2023-04-20 (Thu, 20 Apr 2023)

  Changed paths:
    M mlir/lib/Target/LLVMIR/LoopAnnotationImporter.cpp
    M mlir/test/Target/LLVMIR/Import/import-failure.ll
    M mlir/test/Target/LLVMIR/Import/metadata-loop.ll

  Log Message:
  -----------
  [mlir][llvm] Improve access group import handling.

In particular, do not drop all access groups of a loop annotation
if one of them is unused. This change makes the access group import
robust against stale access group references in loop metadata.

Reviewed By: Dinistro

Differential Revision: https://reviews.llvm.org/D148791