[all-commits] [llvm/llvm-project] 0c82e0: [LICM] Use OverflowTracking to preserve NUW/NSW wh...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0c82e06bb6218c186888d3a4186aae6309bb74c4
      https://github.com/llvm/llvm-project/commit/0c82e06bb6218c186888d3a4186aae6309bb74c4
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2025-05-20 (Tue, 20 May 2025)

  Changed paths:
    M llvm/lib/Transforms/Scalar/LICM.cpp
    M llvm/test/Transforms/LICM/hoist-binop.ll

  Log Message:
  -----------
  [LICM] Use OverflowTracking to preserve NUW/NSW when reassociating. (#140404)

This enables preserving NSW when both adds have NSW and NUW.

For now, set AllKnownNonNegative/AllKnownNonZero to false when using in
LICM.

https://alive2.llvm.org/ce/z/uu79Xc

Depends on https://github.com/llvm/llvm-project/pull/140403.

PR: https://github.com/llvm/llvm-project/pull/140404



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