llvm-project

577631f0 - Reapply "[VPlan] Add transformation to narrow interleave groups. (#106441)"

Reapply "[VPlan] Add transformation to narrow interleave groups. (#106441)" This reverts commit ff3e2ba9eb94217f3ad3525dc18b0c7b684e0abf. The recommmitted version limits to transform to cases where no interleaving is taking place, to avoid a mis-compile when interleaving. Original commit message: This patch adds a new narrowInterleaveGroups transfrom, which tries convert a plan with interleave groups with VF elements to a plan that instead replaces the interleave groups with wide loads and stores processing VF elements. This effectively is a very simple form of loop-aware SLP, where we use interleave groups to identify candidates. This initial version is quite restricted and hopefully serves as a starting point for how to best model those kinds of transforms. Depends on https://github.com/llvm/llvm-project/pull/106431. Fixes https://github.com/llvm/llvm-project/issues/82936. PR: https://github.com/llvm/llvm-project/pull/106441