[Bug target/90568] stack protector should use cmp or sub, not xor, to allow macro-fusion on x86

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90568

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 24 08:58:50 2019
New Revision: 271596

URL: https://gcc.gnu.org/viewcvs?rev=271596&root=gcc&view=rev
Log:
        PR target/90568
        * config/i386/x86-tune-sched.c (ix86_macro_funsion_pair_p): Call
        gen_attr_type just once instead of 4-7 times.  Formatting fixes.
        Handle stack_protect_test_<mode> codegen similarly to corresponding
        sub instruction.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/x86-tune-sched.c