https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114375
--- Comment #3 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:94c3508c5a14d1948fe3bffa9e16c6f3d9c2836a commit r14-9533-g94c3508c5a14d1948fe3bffa9e16c6f3d9c2836a Author: Richard Biener <rguent...@suse.de> Date: Mon Mar 18 12:39:03 2024 +0100 tree-optimization/114375 - disallow SLP discovery of permuted mask loads We cannot currently handle permutations of mask loads in code generation or permute optimization. But we simply drop any permutation on the floor, so the following instead rejects the SLP build rather than producing wrong-code. I've also made sure to reject them in vectorizable_load for completeness. PR tree-optimization/114375 * tree-vect-slp.cc (vect_build_slp_tree_2): Compute the load permutation for masked loads but reject it when any such is necessary. * tree-vect-stmts.cc (vectorizable_load): Reject masked VMAT_ELEMENTWISE and VMAT_STRIDED_SLP as those are not supported. * gcc.dg/vect/vect-pr114375.c: New testcase.
