https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115299
--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by hongtao Liu <liuho...@gcc.gnu.org>: https://gcc.gnu.org/g:ac306de7d5100d3682eae2270995a9abbe19db38 commit r15-984-gac306de7d5100d3682eae2270995a9abbe19db38 Author: liuhongt <hongtao....@intel.com> Date: Fri May 31 14:38:07 2024 +0800 Add some preference for floating point rtl ifcvt when sse4.1 is not available W/o TARGET_SSE4_1, it takes 3 instructions (pand, pandn and por) for movdfcc/movsfcc, and could possibly fail cost comparison. Increase branch cost could hurt performance for other modes, so specially add some preference for floating point ifcvt. gcc/ChangeLog: PR target/115299 * config/i386/i386.cc (ix86_noce_conversion_profitable_p): Add some preference for floating point ifcvt when SSE4.1 is not available. gcc/testsuite/ChangeLog: * gcc.target/i386/pr115299.c: New test. * gcc.target/i386/pr86722.c: Adjust testcase.
