Volodymyr Vasylkun 8320b97ab9 [InstCombine] Fold an unsigned comparison of add nsw X, C with a constant into a signed comparison (#103480) ...

Given an unsigned integer comparison of `add nsw X, C1` with some
constant `C2` we can fold it into a signed comparison of `X` and `C2 -
C1` under the following conditions:
  * There's a `nsw` flag on the addition
  * `C2` is non-negative
  * `X + C1` is non-negative
  * `C2 - C1` is non-negative

2024-08-14 15:31:19 +01:00

327 KiB

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