https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83523
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Author: jakub Date: Thu Dec 21 19:27:21 2017 New Revision: 255953 URL: https://gcc.gnu.org/viewcvs?rev=255953&root=gcc&view=rev Log: PR tree-optimization/83523 * tree-ssa-math-opts.c (is_widening_mult_p): Return false if for INTEGER_TYPE TYPE_OVERFLOW_TRAPS. (convert_mult_to_fma): Likewise. * g++.dg/tree-ssa/pr83523.C: New test. Added: trunk/gcc/testsuite/g++.dg/tree-ssa/pr83523.C Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-ssa-math-opts.c