[Bug target/88717] Unnecessary vzeroupper

[hjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88717

--- Comment #8 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Jan  8 17:40:18 2019
New Revision: 267732

URL: https://gcc.gnu.org/viewcvs?rev=267732&root=gcc&view=rev
Log:
x86: Don't generate vzeroupper if caller passes AVX/AVX512 registers

There is no need to generate vzeroupper if caller passes arguments in
AVX/AVX512 registers.

Tested on i686 and x86-64 with and without --with-arch=native.

gcc/

        PR target/88717
        * config/i386/i386.c (ix86_avx_u128_mode_exit): Call
        ix86_avx_u128_mode_entry.

gcc/testsuite/

        PR target/88717
        * gcc.target/i386/pr88717.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr88717.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog