https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115981
--- Comment #4 from Hongtao Liu <liuhongt at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #3) > Created attachment 58786 [details] > gcc15-pr115981.patch > > Untested fix. As since that commit it checks swap_commutative_operands_p: > 1) CONST_VECTOR I think has commutative_operand_precedence -4 > 2) REG has commutative_operand_precedence -1 or -2 > 3) SUBREG of object has commutative_operand_precedence -3 > 4) VEC_DUPLICATE has commutative_operand_precedence 0 > Which means the VEC_DUPLICATE operand will always come first and whatever > matches reg_or_0_operand will always come second, i.e. exactly not the order > in the pattern, so we don't need to add another one, can just change order > of this one. Patch LGTM.
