Simon Pilgrim 2d0087424f [DAG] Remove extract_vector_elt(freeze(x)), idx -> freeze(extract_vector_elt(x), idx) fold (#87480) ...

Reverse the fold with handling inside canCreateUndefOrPoison for cases where we know that the extract index is in bounds.

This exposed a number or regressions, and required some initial freeze handling of SCALAR_TO_VECTOR, which will require us to properly improve demandedelts support to handle its undef upper elements.

There is still one outstanding regression to be addressed in the future - how do we want to handle folds involving frozen loads?

Fixes #86968

2024-04-04 11:10:55 +01:00

481 KiB

Raw Blame History

View Raw