[Bug target/58268] ymm registers not used for -march=bdver1

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58268

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID
            Summary|umm registers not used for  |ymm registers not used for
                   |-march=bdver1               |-march=bdver1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think it's a deliberate tuning choice for this architecture which I think
enables -mprefer-avx128 by default:

config/i386/x86-tune.def:DEF_TUNE (X86_TUNE_AVX128_OPTIMAL, "avx128_optimal",
m_BDVER | m_BTVER2)