Yingwei Zheng c59ea32f82 [InstCombine] Canonicalize icmp pred (X +/- C1), C2 into icmp pred X, C2 -/+ C1 with nowrap flag implied by with.overflow intrinsic (#75511) ...

This patch tries to canonicalize the pattern `Overflow | icmp pred Res,
C2` into `Overflow | icmp pred X, C2 +/- C1`, where `Overflow` and `Res`
are return values of `xxx.with.overflow X, C1`.
Alive2: https://alive2.llvm.org/ce/z/PhR_3S

Fixes #75360.

2023-12-16 17:58:57 +08:00

190 KiB

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