https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120708
--- Comment #2 from GCC 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:050b1708ea532ea4840e97d85fad4ca63d4cd631 commit r16-1588-g050b1708ea532ea4840e97d85fad4ca63d4cd631 Author: H.J. Lu <hjl.to...@gmail.com> Date: Thu Jun 19 05:03:48 2025 +0800 x86: Get the widest vector mode from MOVE_MAX Since MOVE_MAX defines the maximum number of bytes that an instruction can move quickly between memory and registers, use it to get the widest vector mode in vector loop when inlining memcpy and memset. gcc/ PR target/120708 * config/i386/i386-expand.cc (ix86_expand_set_or_cpymem): Use MOVE_MAX to get the widest vector mode in vector loop. gcc/testsuite/ PR target/120708 * gcc.target/i386/memcpy-pr120708-1.c: New test. * gcc.target/i386/memcpy-pr120708-2.c: Likewise. * gcc.target/i386/memcpy-pr120708-3.c: Likewise. * gcc.target/i386/memcpy-pr120708-4.c: Likewise. * gcc.target/i386/memcpy-pr120708-5.c: Likewise. * gcc.target/i386/memcpy-pr120708-6.c: Likewise. * gcc.target/i386/memset-pr120708-1.c: Likewise. * gcc.target/i386/memset-pr120708-2.c: Likewise. * gcc.target/i386/memcpy-strategy-1.c: Drop dg-skip-if. Replace -march=atom with -mno-avx -msse2 -mtune=generic -mtune-ctrl=^sse_typeless_stores. * gcc.target/i386/memcpy-strategy-2.c: Likewise. * gcc.target/i386/memcpy-vector_loop-1.c: Likewise. * gcc.target/i386/memcpy-vector_loop-2.c: Likewise. * gcc.target/i386/memset-vector_loop-1.c: Likewise. * gcc.target/i386/memset-vector_loop-2.c: Likewise. Signed-off-by: H.J. Lu <hjl.to...@gmail.com>
