[Bug target/47440] Use LCM for vzeroupper insertion

[uros at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47440



--- Comment #8 from uros at gcc dot gnu.org 2012-11-14 16:47:43 UTC ---

Author: uros

Date: Wed Nov 14 16:47:29 2012

New Revision: 193503



URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193503

Log:

    PR target/47440

    * config/i386/i386.c (gate_insert_vzeroupper): New function.

    (rest_of_handle_insert_vzeroupper): Ditto.

    (struct rtl_opt_pass pass_insert_vzeroupper): New.

    (ix86_option_override): Register vzeroupper insertion pass here.

    (ix86_check_avx256_register): Handle SUBREGs properly.

    (ix86_init_machine_status): Remove optimize_mode_switching[AVX_U128]

    initialization.





Modified:

    trunk/gcc/ChangeLog

    trunk/gcc/config/i386/i386.c