https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101495
--- Comment #1 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:5586e7e85de381f3df843091494889f8ad8e3e1f commit r12-2385-g5586e7e85de381f3df843091494889f8ad8e3e1f Author: H.J. Lu <hjl.to...@gmail.com> Date: Sun Jul 18 06:12:29 2021 -0700 x86: Don't issue vzeroupper if callee returns AVX register Don't issue vzeroupper before function call if callee returns AVX register since callee must be compiled with AVX. gcc/ PR target/101495 * config/i386/i386.c (ix86_check_avx_upper_stores): Moved before ix86_avx_u128_mode_needed. (ix86_avx_u128_mode_needed): Return AVX_U128_DIRTY if callee returns AVX register. gcc/testsuite/ PR target/101495 * gcc.target/i386/avx-vzeroupper-28.c: New test.
