[Bug target/80833] 32-bit x86 causes store-forwarding stalls for int64_t -> xmm

[uros at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80833

--- Comment #13 from uros at gcc dot gnu.org ---
Author: uros
Date: Tue May 30 17:18:25 2017
New Revision: 248691

URL: https://gcc.gnu.org/viewcvs?rev=248691&root=gcc&view=rev
Log:
        PR target/80833
        * config/i386/constraints.md (Yd): New constraint.
        (Ye): Ditto.
        * config/i386/i386.md (*movti_internal): Add (?r, Ye)
        and (?Yd, r) alternatives.  Update insn attributes.
        * config/i386/i386.md (*movti_internal): Add (?r, *Ye)
        and (?*Yd, r) alternatives.  Update insn attributes.
        (double-mode inter-unit splitters): Add new GR<->XMM splitters.

testsuite/ChangeLog:

        PR target/80833
        * gcc.target/i386/pr80833-1.c: New test.
        * gcc.target/i386/pr80833-2.c: Ditto.


Added:
    trunk/gcc/testsuite/gcc.target/i386/pr80833-1.c
    trunk/gcc/testsuite/gcc.target/i386/pr80833-2.c
Modified:
    trunk/gcc/config/i386/constraints.md
    trunk/gcc/config/i386/i386.md