Re: [Qemu-devel] Re: [PATCH 0/7] clean build - eliminate warnings

["Edgar E. Iglesias" <edgar.iglesias@axis.com>]

On Sat, Feb 21, 2009 at 09:09:01PM +0100, Jan Kiszka wrote:
> Laurent Desnogues wrote:
> > On Sat, Feb 21, 2009 at 8:00 PM, Jan Kiszka <jan.kiszka@web.de> wrote:
> >> When working on larger or intrusive changes like the monitor rework, the
> >> number of warnings a normal build generates (here: x86-64 host, gcc 4.3)
> >> is still too high. And sometimes these warnings are not just of cosmetic
> >> nature, see (reposted) patch 3.
> >>
> >> This series reduces the number of warnings significantly, still not to
> >> zero (someone would have to look into the NetWinder stuff), but almost:
> >>
> >> Warning summary for 2009-02-21 (changes since 2009-02-21-base)
> >>  generic          0    (-1)
> >>  softmmu          0   (-39)
> >>    x86            0     (0)
> >>    arm            0   (-10)
> > 
> > This means that after applying your patch there should be no more
> > warning for the ARM target?
> 
> At least for softmmu, at least with my compiler (depending on the
> precise version / distro patches, you may have different warnings
> enabled by default): yes.
> 
> > 
> > On my machine (x86_64, gcc 4.1.2), I still get these:
> > 
> >   CC    arm-softmmu/neon_helper.o
> > /home/ldesnogu/work/Emu/qemu/svn-ref/target-arm/neon_helper.c: In
> > function ?helper_neon_rshl_s8?:
> > /home/ldesnogu/work/Emu/qemu/svn-ref/target-arm/neon_helper.c:469:
> > warning: ?vdest.v1? is used uninitialized in this function
> > /home/ldesnogu/work/Emu/qemu/svn-ref/target-arm/neon_helper.c:469:
> > warning: ?vdest.v2? is used uninitialized in this function
> > /home/ldesnogu/work/Emu/qemu/svn-ref/target-arm/neon_helper.c:469:
> > warning: ?vdest.v3? is used uninitialized in this function
> > /home/ldesnogu/work/Emu/qemu/svn-ref/target-arm/neon_helper.c:469:
> > warning: ?vdest.v4? is used uninitialized in this function
> > /home/ldesnogu/work/Emu/qemu/svn-ref/target-arm/neon_helper.c: In
> > function ?helper_neon_rshl_s16?:
> > /home/ldesnogu/work/Emu/qemu/svn-ref/target-arm/neon_helper.c:470:
> > warning: ?vdest.v1? is used uninitialized in this function
> > /home/ldesnogu/work/Emu/qemu/svn-ref/target-arm/neon_helper.c:470:
> > warning: ?vdest.v2? is used uninitialized in this function
> > /home/ldesnogu/work/Emu/qemu/svn-ref/target-arm/neon_helper.c: In
> > function ?helper_neon_rshl_s32?:
> > /home/ldesnogu/work/Emu/qemu/svn-ref/target-arm/neon_helper.c:471:
> > warning: ?vdest.v1? is used uninitialized in this function
> 
> Has this been identified as a real issue or just compiler blindness (my
> series contains one "fix" for such blindness, see cris patch)? I'm

Sorry, I missed any posted CRIS patch. Please post it again if you
have one and please CC me and I'll apply it if I agree with it.

Sorry if I missed your email.

Best regards,
Edgar

> currently a bit lost in those macros...
> 
> > 
> > Note a patch has been proposed in the past (by Aurélien IIRC).
> 
> Do you have a reference at hand?
> 
> Jan
>