[all-commits] [llvm/llvm-project] 9e22f9: [DAGCombiner] Fix a "subtraction if above a consta...

[Piotr Fusik via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9e22f9611a5b61f412dbf1b72a4fe2d2089eeec2
      https://github.com/llvm/llvm-project/commit/9e22f9611a5b61f412dbf1b72a4fe2d2089eeec2
  Author: Piotr Fusik <p.fusik at samsung.com>
  Date:   2025-05-17 (Sat, 17 May 2025)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/test/CodeGen/RISCV/rv32zbb.ll
    M llvm/test/CodeGen/RISCV/rv64zbb.ll

  Log Message:
  -----------
  [DAGCombiner] Fix a "subtraction if above a constant threshold" miscompile (#140042)

This fixes #135194 incorrectly reusing the existing `add nuw/nsw`
while the transformed code relies on an unsigned wrap.



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