[Bug rtl-optimization/57193] [6/7/8 Regression] suboptimal register allocation for SSE registers

[vmakarov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57193

--- Comment #16 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Author: vmakarov
Date: Fri Feb  9 18:23:58 2018
New Revision: 257537

URL: https://gcc.gnu.org/viewcvs?rev=257537&root=gcc&view=rev
Log:
2018-02-09  Vladimir Makarov  <vmaka...@redhat.com>

        PR rtl-optimization/57193
        * ira-color.c (struct allocno_color_data): Add member
        conflict_allocno_hard_prefs.
        (update_conflict_allocno_hard_prefs): New.
        (bucket_allocno_compare_func): Add a preference based on
        conflict_allocno_hard_prefs.
        (push_allocno_to_stack): Update conflict_allocno_hard_prefs.
        (color_allocnos): Remove a dead code.  Initiate
        conflict_allocno_hard_prefs.  Call update_costs_from_prefs.

2018-02-09  Vladimir Makarov  <vmaka...@redhat.com>

        PR rtl-optimization/57193
        * gcc.target/i386/57193.c: New.


Added:
    trunk/gcc/testsuite/gcc.target/i386/pr57193.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ira-color.c
    trunk/gcc/testsuite/ChangeLog