https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95458
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by H.J. Lu <h...@gcc.gnu.org>: https://gcc.gnu.org/g:4052c05e5b30fee0fb95a51e74e12a56dce29491 commit r11-4380-g4052c05e5b30fee0fb95a51e74e12a56dce29491 Author: H.J. Lu <hjl.to...@gmail.com> Date: Wed Jul 15 10:34:54 2020 -0700 x86: Inline strncmp only with -minline-all-stringops Expand strncmp to "repz cmpsb" only with -minline-all-stringops since "repz cmpsb" can be much slower than strncmp function implemented with vector instructions, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43052 gcc/ PR target/95458 * config/i386/i386-expand.c (ix86_expand_cmpstrn_or_cmpmem): Return false for -mno-inline-all-stringops. gcc/testsuite/ PR target/95458 * gcc.target/i386/pr95458-1.c: New test. * gcc.target/i386/pr95458-2.c: Likewise.
