Nikita Popov 68e1ba8188 [SCEV] Fold umin_seq using known predicate ...

Fold %x umin_seq %y to %x if %x ule %y. This also subsumes the
special handling for constant operands, as if %y is constant this
folds to umin via implied poison reasoning, and if %x is constant
then either %x is not zero and it folds to umin, or it is known
zero, in which case it is ule anything.

2022-05-09 16:35:08 +02:00

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