[all-commits] [llvm/llvm-project] 43dc6b: [KeyInstr][SimplifyCFG] Remap atoms when folding b...

[Orlando Cazalet-Hyams via All-commits]

  Branch: refs/heads/users/OCHyams/ki-llvm-simplifycfg
  Home:   https://github.com/llvm/llvm-project
  Commit: 43dc6bb1718bcf9d33b02b5f9864ac023e0e00dd
      https://github.com/llvm/llvm-project/commit/43dc6bb1718bcf9d33b02b5f9864ac023e0e00dd
  Author: Orlando Cazalet-Hyams <orlando.hyams at sony.com>
  Date:   2025-05-06 (Tue, 06 May 2025)

  Changed paths:
    M llvm/include/llvm/IR/DebugLoc.h
    M llvm/lib/Transforms/Utils/SimplifyCFG.cpp
    A llvm/test/DebugInfo/KeyInstructions/Generic/simplifycfg-branch-fold.ll

  Log Message:
  -----------
  [KeyInstr][SimplifyCFG] Remap atoms when folding br to common succ into pred

SimplifyCFG folds `b` into `a`.

            +-----------+
            |           v
  --> a --> b --> c --> d -->
      |                 ^
      +-----------------+

Remap source atoms in `b` so that the duplicated instructions are analysed
independently to determine is_stmt positions. This is necessary as the
contents of `b` may be folded into multiple preds in this way.

Add multi-pred test.


  Commit: b4bd26747aa54db2c26efa8e92fe534717d11c9e
      https://github.com/llvm/llvm-project/commit/b4bd26747aa54db2c26efa8e92fe534717d11c9e
  Author: Orlando Cazalet-Hyams <orlando.hyams at sony.com>
  Date:   2025-05-06 (Tue, 06 May 2025)

  Changed paths:
    M llvm/test/DebugInfo/KeyInstructions/Generic/simplifycfg-branch-fold.ll

  Log Message:
  -----------
  add diagram to test


  Commit: 791863e7153905fab9baf8efbcbeb5a9a2fde376
      https://github.com/llvm/llvm-project/commit/791863e7153905fab9baf8efbcbeb5a9a2fde376
  Author: Orlando Cazalet-Hyams <orlando.hyams at sony.com>
  Date:   2025-05-06 (Tue, 06 May 2025)

  Changed paths:
    M llvm/lib/Transforms/Utils/SimplifyCFG.cpp

  Log Message:
  -----------
  nit, use PTI


Compare: https://github.com/llvm/llvm-project/compare/0b2929c734aa...791863e71539

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