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RE: [PATCH ARM] Improve ARM memset inlining


Ping^4.

The original thread is
https://gcc.gnu.org/ml/gcc-patches/2014-05/msg00182.html, also there is some
info at https://gcc.gnu.org/ml/gcc-patches/2014-05/msg00182.html in the same
thread.

Thanks,
bin

> -----Original Message-----
> From: gcc-patches-owner@gcc.gnu.org [mailto:gcc-patches-
> owner@gcc.gnu.org] On Behalf Of bin.cheng
> Sent: Wednesday, May 28, 2014 4:53 PM
> To: Richard Earnshaw
> Cc: gcc-patches List
> Subject: RE: [PATCH ARM] Improve ARM memset inlining
> 
> Ping^3
> 
> > -----Original Message-----
> > From: Bin.Cheng [mailto:amker.cheng@gmail.com]
> > Sent: Monday, May 19, 2014 2:40 PM
> > To: Bin Cheng
> > Cc: Richard Earnshaw; gcc-patches List
> > Subject: Re: [PATCH ARM] Improve ARM memset inlining
> >
> > Ping^2
> >
> > Thanks,
> > bin
> >
> > On Mon, May 12, 2014 at 11:17 AM, Bin.Cheng <amker.cheng@gmail.com>
> > wrote:
> > > Ping.
> > >
> > > Thanks,
> > > bin
> > >
> > > On Tue, May 6, 2014 at 12:59 PM, bin.cheng <bin.cheng@arm.com>
> wrote:
> > >>
> > >>
> >
> > >> Precisely, I configured gcc with options "--with-arch=armv7-a
> > >> --with-cpu|--with-tune=cortex-a9".
> > >> I read gcc documents and realized that "-mcpu" is ignored when
> > >> "-march" is specified.  I don't know why gcc acts in this manner,
> > >> but it leads to inconsistent configuration/command line behavior.
> > >> If we configure GCC with "--with-arch=armv7-a
> > >> --with-cpu=cortex-a9", then only "-march=armv7-a" is passed to cc1.
> > >> If we compile with "-march=armv7-a -mcpu=cortex-a9", then gcc works
> > >> fine and passes "-march=armv7-a -mcpu=cortex-a9" to cc1.
> > >>
> > >> Even more weird cc1 warns that "switch -mcpu=cortex-m4 conflicts
> > >> with -march=armv7-m switch".
> > >>
> > >> Thanks,
> > >> bin
> > >>
> > >>
> > >>
> > >>
> > >
> > >
> > >
> > > --
> > > Best Regards.
> >
> >
> >
> > --
> > Best Regards.
> 
> 
> 
> 





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