https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95905
--- Comment #2 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:b668a06e37f72fd96bacd6769990ec97dac4ac6d commit r11-6628-gb668a06e37f72fd96bacd6769990ec97dac4ac6d Author: Jakub Jelinek <ja...@redhat.com> Date: Wed Jan 13 08:02:54 2021 +0100 i386: Optimize _mm_unpacklo_epi8 of 0 vector as second argument or similar VEC_PERM_EXPRs into pmovzx [PR95905] The following patch adds patterns (so far 128-bit only) for permutations like { 0 16 1 17 2 18 3 19 4 20 5 21 6 22 7 23 } where the second operand is CONST0_RTX CONST_VECTOR to be emitted as pmovzx. 2021-01-13 Jakub Jelinek <ja...@redhat.com> PR target/95905 * config/i386/predicates.md (pmovzx_parallel): New predicate. * config/i386/sse.md (*sse4_1_zero_extendv8qiv8hi2_3): New define_insn_and_split pattern. (*sse4_1_zero_extendv4hiv4si2_3): Likewise. (*sse4_1_zero_extendv2siv2di2_3): Likewise. * gcc.target/i386/pr95905-1.c: New test. * gcc.target/i386/pr95905-2.c: New test.
