https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80385
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Author: jakub Date: Fri May 5 21:54:52 2017 New Revision: 247701 URL: https://gcc.gnu.org/viewcvs?rev=247701&root=gcc&view=rev Log: Backported from mainline 2017-04-11 Jakub Jelinek <ja...@redhat.com> PR rtl-optimization/80385 * simplify-rtx.c (simplify_unary_operation_1): Don't transform (not (neg X)) into (plus X -1) for complex or non-integral modes. * g++.dg/opt/pr80385.C: New test. Added: branches/gcc-6-branch/gcc/testsuite/g++.dg/opt/pr80385.C Modified: branches/gcc-6-branch/gcc/ChangeLog branches/gcc-6-branch/gcc/simplify-rtx.c branches/gcc-6-branch/gcc/testsuite/ChangeLog