[all-commits] [llvm/llvm-project] d9952a: [InstCombine] Propagate neg `nsw` when folding `ab...

Pedro Lobo via All-commits all-commits at lists.llvm.org
Thu Jul 24 13:45:58 PDT 2025


  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d9952a7a5f806a419bcbc8aa82cfda179837e189
      https://github.com/llvm/llvm-project/commit/d9952a7a5f806a419bcbc8aa82cfda179837e189
  Author: Pedro Lobo <pedro.lobo at tecnico.ulisboa.pt>
  Date:   2025-07-24 (Thu, 24 Jul 2025)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
    M llvm/test/Transforms/InstCombine/abs-intrinsic.ll

  Log Message:
  -----------
  [InstCombine] Propagate neg `nsw` when folding `abs(-x)` to `abs(x)` (#150460)

We can propagate the nsw in the neg to abs, as `-x` is only poison if x
== INT_MIN.



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