https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97950
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:a1dd66b108cba086f58448ccbe9bf57b0a342f9a commit r11-5279-ga1dd66b108cba086f58448ccbe9bf57b0a342f9a Author: Jakub Jelinek <ja...@redhat.com> Date: Tue Nov 24 10:45:40 2020 +0100 i386: Add *setcc_hi_1* define_insn_and_split [PR97950] As the following testcase shows, unlike char, int or long long sized __builtin_*_overflow{,_p}, for short sized one in most cases the ce1 pass doesn't optimize the jo/jno or jc/jnc jumps with setting of a pseudo to 0/1 into seto/setc. The reason is missing *setcc_hi_1* pattern. The following patch implements it using mode iterators so that on i486 and pentium? one can get the zero extension through and instead of movzbw. 2020-11-24 Jakub Jelinek <ja...@redhat.com> PR target/97950 * config/i386/i386.md (*setcc_si_1_and): Macroize into... (*setcc_<mode>_1_and): New define_insn_and_split with SWI24 iterator. (*setcc_si_1_movzbl): Macroize into... (*setcc_<mode>_1_movzbl): New define_insn_and_split with SWI24 iterator. * gcc.target/i386/pr97950.c: New test.
