https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110495
--- Comment #4 from CVS 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:f703d2fd3f03890a180e8cc04df087c208999e81 commit r14-2282-gf703d2fd3f03890a180e8cc04df087c208999e81 Author: Richard Biener <rguent...@suse.de> Date: Mon Jul 3 10:28:10 2023 +0200 middle-end/110495 - avoid associating constants with (VL) vectors When trying to associate (v + INT_MAX) + INT_MAX we are using the TREE_OVERFLOW bit to check for correctness. That isn't working for VECTOR_CSTs and it can't in general when one considers VL vectors. It looks like it should work for COMPLEX_CSTs but I didn't try to single out _Complex int in this change. The following makes sure that for vectors we use the fallback of using unsigned arithmetic when associating the above to v + (INT_MAX + INT_MAX). PR middle-end/110495 * tree.h (TREE_OVERFLOW): Do not mention VECTOR_CSTs since we do not set TREE_OVERFLOW on those since the introduction of VL vectors. * match.pd (x +- CST +- CST): For VECTOR_CST do not look at TREE_OVERFLOW to determine validity of association. * gcc.dg/tree-ssa/addadd-2.c: Amend. * gcc.dg/tree-ssa/forwprop-27.c: Adjust.
