[Bug target/78090] [x86_64]: GCC allows integer register for inter unit conversion under -mtune-ctrl=^inter_unit_conversions .

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78090

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Mar 14 08:48:40 2018
New Revision: 258515

URL: https://gcc.gnu.org/viewcvs?rev=258515&root=gcc&view=rev
Log:
        PR target/84844
        Revert
        2017-04-20  Uros Bizjak  <ubiz...@gmail.com>

        PR target/78090
        * config/i386/constraints.md (Yc): New register constraint.
        * config/i386/i386.md (*float<SWI48:mode><MODEF:mode>2_mixed):
        Use Yc constraint for alternative 2 of operand 0.  Remove
        preferred_for_speed attribute.

        * gcc.target/i386/pr84844.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr84844.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/constraints.md
    trunk/gcc/config/i386/i386.md
    trunk/gcc/testsuite/ChangeLog