[all-commits] [llvm/llvm-project] b9e327: [GlobalISel] Clear nsw flags when converting sub t...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b9e32749d273a957e60170d6e7ef205fd1fb1834
      https://github.com/llvm/llvm-project/commit/b9e32749d273a957e60170d6e7ef205fd1fb1834
  Author: David Green <david.green at arm.com>
  Date:   2025-04-26 (Sat, 26 Apr 2025)

  Changed paths:
    M llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-trivial-arith.mir
    M llvm/test/CodeGen/AArch64/sub1.ll

  Log Message:
  -----------
  [GlobalISel] Clear nsw flags when converting sub to add. (#137288)

As shown in https://alive2.llvm.org/ce/z/PVwcTL we need to clear the nsw
flags too when converting a sub to a add if the constant is INT_MIN.

Fixes #137254



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