[Bug target/77270] Flag -mprftchw is shared with 3dnow for -march=k8

[uros at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77270

--- Comment #9 from uros at gcc dot gnu.org ---
Author: uros
Date: Sun Aug 21 18:53:48 2016
New Revision: 239643

URL: https://gcc.gnu.org/viewcvs?rev=239643&root=gcc&view=rev
Log:
        PR target/77270
        * config/i386/i386.md (prefetch): When TARGET_PRFCHW or
        TARGET_PREFETCHWT1 are disabled, emit 3dNOW! write prefetches for
        non-SSE2 athlons only, otherwise prefer SSE prefetches.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.md