https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100148
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-8 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:bef3ed832a97b0cdfb540fc5c5dee923ccdc540a commit r8-10944-gbef3ed832a97b0cdfb540fc5c5dee923ccdc540a Author: Jakub Jelinek <ja...@redhat.com> Date: Wed Apr 21 12:31:45 2021 +0200 cprop: Fix -fcompare-debug bug in constprop_register [PR100148] The following testcase shows different behavior between -g and -g0 in constprop_register, if a flags register setter is separated from a conditional jump using those flags with -g by a DEBUG_INSN. As it uses just NEXT_INSN, for -g it will look at the DEBUG_INSN which is not a conditional jump, while otherwise it would look at the conditional jump and call cprop_jump. 2021-04-21 Jakub Jelinek <ja...@redhat.com> PR rtl-optimization/100148 * cprop.c (constprop_register): Use next_nondebug_insn instead of NEXT_INSN. * g++.dg/opt/pr100148.C: New test. (cherry picked from commit 022f6ee3ad67ee30f62c8c2aeeb4156494f3284e)
