https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Author: jakub Date: Thu Oct 19 08:37:04 2017 New Revision: 253884 URL: https://gcc.gnu.org/viewcvs?rev=253884&root=gcc&view=rev Log: PR target/82580 * config/i386/i386.md (setcc + movzbl to xor + setcc): New peephole2. (setcc + and to xor + setcc): New peephole2. * gcc.target/i386/pr82580.c: Use {\msbb} instead of "sbb" in scan-assembler-times. Check that there are no movzb* instructions if lp64. Modified: trunk/gcc/ChangeLog trunk/gcc/config/i386/i386.md trunk/gcc/testsuite/ChangeLog trunk/gcc/testsuite/gcc.target/i386/pr82580.c