[Bug target/72839] MOVE_RATIO is too small for Lakemont

[hjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72839

--- Comment #1 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Thu Aug 18 14:59:46 2016
New Revision: 239578

URL: https://gcc.gnu.org/viewcvs?rev=239578&root=gcc&view=rev
Log:
Increase MOVE_RATIO to 17 for Lakemont

Larger MOVE_RATIO will always make code faster.  17 is the number with
smaller code sizes for Lakemont.

gcc/

        PR target/72839
        * config/i386/i386.c (lakemont_cost): Set MOVE_RATIO to 17.

gcc/testsuite/

        PR target/72839
        * gcc.target/i386/pr72839.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr72839.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog