https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114375
--- Comment #8 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:dc90578f0b3b766303eef6f1acce45d603dee2c6 commit r15-4195-gdc90578f0b3b766303eef6f1acce45d603dee2c6 Author: Richard Biener <rguent...@suse.de> Date: Tue Oct 8 14:28:16 2024 +0200 tree-optimization/116575 - handle SLP of permuted masked loads The following handles SLP discovery of permuted masked loads which was prohibited (because wrongly handled) for PR114375. In particular with single-lane SLP at the moment all masked group loads appear permuted and we fail to use masked load lanes as well. The following addresses parts of the issues, starting with doing correct basic discovery - namely discover an unpermuted mask load followed by a permute node. In particular groups with gaps do not support masking yet (and didn't before w/o SLP IIRC). There's still issues with how we represent masked load/store-lanes I think, but I first have to get my hands on a good testcase. PR tree-optimization/116575 PR tree-optimization/114375 * tree-vect-slp.cc (vect_build_slp_tree_2): Do not reject permuted mask loads without gaps but instead discover a node for the full unpermuted load and permute that with a VEC_PERM node. * gcc.dg/vect/vect-pr114375.c: Expect vectorization now with avx2.
