[all-commits] [llvm/llvm-project] adbe9e: llvm-reduce: Skip setting br conditions on already...

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: adbe9e20bf157fda89a8896d3832dc9e3cd4351c
      https://github.com/llvm/llvm-project/commit/adbe9e20bf157fda89a8896d3832dc9e3cd4351c
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2025-04-02 (Wed, 02 Apr 2025)

  Changed paths:
    A llvm/test/tools/llvm-reduce/simplify-conditionals-already-constant-brcond.ll
    M llvm/tools/llvm-reduce/deltas/ReduceUsingSimplifyCFG.cpp

  Log Message:
  -----------
  llvm-reduce: Skip setting br conditions on already constant branches (#133841)

If we are trying to simplify branch conditions to true, ignore branches
already set to a constant true. If we are simplifying to constant false,
ignore the already constant false cases. This saves steps in this edge
case, and avoids the side effect of running simplifycfg on blocks we
did not intend to modify.



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