[Bug target/89071] AVX vcvtsd2ss lets us avoid PXOR dependency breaking for scalar float<->double and other scalar xmm,xmm instructions

[uros at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89071

--- Comment #17 from uros at gcc dot gnu.org ---
Author: uros
Date: Sun Feb  3 16:48:41 2019
New Revision: 268496

URL: https://gcc.gnu.org/viewcvs?rev=268496&root=gcc&view=rev
Log:
        PR target/89071
        * config/i386/i386.md (*sqrt<mode>2_sse): Add (v,0) alternative.
        Do not prefer (v,v) alternative for non-AVX targets and (m,v)
        alternative for speed when TARGET_SSE_PARTIAL_REG_DEPENDENCY is set.
        (*rcpsf2_sse): Ditto.
        (*rsqrtsf2_sse): Ditto.
        (sse4_1_round<mode<2): Ditto.


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