[Bug target/59021] [4.9 regression] new vzeroupper instructions generated with -mavx

[uros at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59021

--- Comment #5 from uros at gcc dot gnu.org ---
Author: uros
Date: Wed Nov  6 19:37:12 2013
New Revision: 204464

URL: http://gcc.gnu.org/viewcvs?rev=204464&root=gcc&view=rev
Log:
    PR target/59021
    * config/i386/i386.c (ix86_avx_u128_mode_needed): Require
    AVX_U128_DIRTY mode for call_insn RTXes that use AVX256 registers.
    (ix86_avx_u128_mode_needed): Return AVX_U128_DIRTY mode for call_insn
    RTXes that return in AVX256 register.

testsuite/ChangeLog:

    PR target/59021
    * gcc.target/i386/pr59021.c: New test.


Added:
    trunk/gcc/testsuite/gcc.target/i386/pr59021.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog