Volodymyr Vasylkun abf69a167b [InstCombine] Fold (x < y) ? -1 : zext(x != y) into u/scmp(x,y) (#101049) ...

This patch adds the aforementioned fold to InstCombine. This pattern is
produced after naive implementations of 3-way comparison in high-level
languages are transformed into LLVM IR and then optimized.

Proofs: https://alive2.llvm.org/ce/z/w4QLq_

2024-08-19 13:02:29 +01:00

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