[all-commits] [llvm/llvm-project] 59720d: [InstCombine] Fold `icmp spred (X *nsw Z), (Y *nsw...

[Yingwei Zheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 59720dc703f7f207d013b065d0ed7d3af7168bcc
      https://github.com/llvm/llvm-project/commit/59720dc703f7f207d013b065d0ed7d3af7168bcc
  Author: Yingwei Zheng <dtcxzyw2333 at gmail.com>
  Date:   2024-12-05 (Thu, 05 Dec 2024)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
    M llvm/test/Transforms/InstCombine/icmp-mul.ll

  Log Message:
  -----------
  [InstCombine] Fold `icmp spred (X *nsw Z), (Y *nsw Z) -> icmp pred Z, 0` if `scmp(X, Y)` is known (#118726)

```
icmp spred (X *nsw Z), (Y *nsw Z) -> icmp swap(spred) Z, 0 if X s< Y
icmp spred (X *nsw Z), (Y *nsw Z) -> icmp spred       Z, 0 if X s> Y
```
Alive2: https://alive2.llvm.org/ce/z/F2D0GE



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