https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114375
--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:c1b21855e131bb818aedc953f403812b494917fc commit r12-10449-gc1b21855e131bb818aedc953f403812b494917fc 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. (cherry picked from commit 4f2a35a76cca503749c696e7772d2e8eadc77ba5)
