[all-commits] [llvm/llvm-project] c33a47: [mlir][CSE] fix use-after-free (#203849)

[Stefan Schuermans via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c33a47e6863b3294e693e540df8134a486eafef7
      https://github.com/llvm/llvm-project/commit/c33a47e6863b3294e693e540df8134a486eafef7
  Author: Stefan Schuermans <schuermans at roofline.ai>
  Date:   2026-06-15 (Mon, 15 Jun 2026)

  Changed paths:
    M mlir/lib/Transforms/Utils/CSE.cpp

  Log Message:
  -----------
  [mlir][CSE] fix use-after-free (#203849)

There was a use-after free introduced accidentally by e79e056ee982
[mlir][CSE] Remove the opsToErase container and immediately delete dead
ops. (#203702) This change fixes it by moving the copy of the location
(the "use") to before the deletion of the op (the "free").

Locating the use-after-free has been assisted by Claude Code. The
implementation of the fix has been done without it.

Signed-off-by: Stefan Schuermans <schuermans at roofline.ai>



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