llvm-project

0e5cad06 - [mlir][vector] Fold vector extract from insert when trailing unit dims (#192109)

[mlir][vector] Fold vector extract from insert when trailing unit dims (#192109) Upstreamed from https://github.com/iree-org/iree/pull/23789 Folds vector.extract from vector.insert when the extract position is a prefix of the insert position and the remaining (un-indexed) dimensions of the extracted sub-vector are all size 1. In that case the extracted value is fully determined by the inserted value. Example: %ins = vector.insert %s, %v [3, 0] : f32 into vector<16x1xf32> %ext = vector.extract %ins [3] : vector<1xf32> from vector<16x1xf32> folds to: %ext = vector.broadcast %s : f32 to vector<1xf32> Co-authored-by: Jakub Kuderski <kubakuderski@gmail.com> Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>