[Bug target/83008] [performance] Is it better to avoid extra instructions in data passing between loops?

[uros at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83008

--- Comment #37 from uros at gcc dot gnu.org ---
Author: uros
Date: Thu Feb  8 22:31:15 2018
New Revision: 257505

URL: https://gcc.gnu.org/viewcvs?rev=257505&root=gcc&view=rev
Log:
        PR target/83008
        * config/i386/x86-tune-costs.h (skylake_cost): Fix cost of
        storing integer register in SImode.  Fix cost of 256 and 512
        byte aligned SSE register store.

        * config/i386/i386.c (ix86_multiplication_cost): Fix
        multiplication cost for TARGET_AVX512DQ.

testsuite/ChangeLog:    

        PR target/83008
        * gcc.target/i386/pr83008.c: New test.


Added:
    trunk/gcc/testsuite/gcc.target/i386/pr83008.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/config/i386/x86-tune-costs.h
    trunk/gcc/testsuite/ChangeLog