[all-commits] [llvm/llvm-project] 0e13ce: [InstCombine] Handle mul in `maintainNoSignedWrap`...

[Yingwei Zheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0e13ce770bfbee7cfbc8086a038a950fe12c03d5
      https://github.com/llvm/llvm-project/commit/0e13ce770bfbee7cfbc8086a038a950fe12c03d5
  Author: Yingwei Zheng <dtcxzyw2333 at gmail.com>
  Date:   2025-01-17 (Fri, 17 Jan 2025)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
    M llvm/test/Transforms/InstCombine/nsw.ll

  Log Message:
  -----------
  [InstCombine] Handle mul in `maintainNoSignedWrap` (#123299)

Alive2: https://alive2.llvm.org/ce/z/Kgamks
Closes https://github.com/llvm/llvm-project/issues/123175.

For `@foo1`, the nsw flag is propagated because we first convert it into
`mul nsw nuw (shl nsw nuw X, 1), 3`.



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