On Fri, Oct 10, 2014 at 8:07 AM, Evgeny Stupachenko <evstu...@gmail.com> wrote: > Hi, > > We've met several performance issues (up to 15%) on Silvermont caused > by the PARTIAL_REG_DEPENDENCY tuning. > Previously discussed here: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57954 > Propose removing Silvermont related tune from PARTIAL_REG_DEPENDENCY. > > The patch passed bootstrap, make check. > > Is it ok for trunk? > > Thanks, > Evgeny > > 2014-10-10 Evgeny Stupachenko <evstu...@gmail.com> > > * config/i386/x86-tune.def (X86_TUNE_PARTIAL_REG_DEPENDENCY):
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ It should be X86_TUNE_SSE_PARTIAL_REG_DEPENDENCY. > Remove m_SILVERMONT and m_INTEL from the tune. > > diff --git a/gcc/config/i386/x86-tune.def b/gcc/config/i386/x86-tune.def > index 215c63c..b6b210e 100644 > --- a/gcc/config/i386/x86-tune.def > +++ b/gcc/config/i386/x86-tune.def > @@ -58,8 +58,8 @@ DEF_TUNE (X86_TUNE_PARTIAL_REG_DEPENDENCY, > "partial_reg_dependency", > SPECfp regression, while enabling it on K8 brings roughly 2.4% regression > that can be partly masked by careful scheduling of moves. */ > DEF_TUNE (X86_TUNE_SSE_PARTIAL_REG_DEPENDENCY, "sse_partial_reg_dependency", > - m_PPRO | m_P4_NOCONA | m_CORE_ALL | m_BONNELL | m_SILVERMONT > - | m_INTEL | m_AMDFAM10 | m_BDVER | m_GENERIC) > + m_PPRO | m_P4_NOCONA | m_CORE_ALL | m_BONNELL | m_AMDFAM10 > + | m_BDVER | m_GENERIC) > > /* X86_TUNE_SSE_SPLIT_REGS: Set for machines where the type and dependencies > are resolved on SSE register parts instead of whole registers, so we may -- H.J.
