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Date:      Mon, 27 Sep 2010 14:30:18 +0200
From:      Olivier Smedts <olivier@gid0.org>
To:        Dimitry Andric <dim@freebsd.org>
Cc:        Rene Ladan <rene@freebsd.org>, Roman Divacky <rdivacky@freebsd.org>, Bartosz Stec <admin@kkip.pl>, current@freebsd.org
Subject:   Re: Clang now builds world and kernel, on i386 and amd64
Message-ID:  <AANLkTinLBqqGXe%2Bg_hM8hucOvi1s8bqfaSXGzeuqYwAF@mail.gmail.com>
In-Reply-To: <4CA0743F.8050408@FreeBSD.org>
References:  <4C99A53E.7060707@FreeBSD.org> <AANLkTi=_ZpYZ7XwHJOYuRMOFCGebRwD=YEYORKnMmC0s@mail.gmail.com> <4C9A32B8.60204@kkip.pl> <4C9A6A38.4080307@freebsd.org> <4C9A7203.8010701@kkip.pl> <20100923065134.GA31455@freebsd.org> <4C9B3207.2070302@kkip.pl> <AANLkTikD__CJy88CAtV2d7Tso20dG5OFtVLs845F%2Bx3X@mail.gmail.com> <4CA0743F.8050408@FreeBSD.org>

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2010/9/27 Dimitry Andric <dim@freebsd.org>:
> On 2010-09-27 09:32, Olivier Smedts wrote:
>>
>> 2010/9/23 Bartosz Stec<admin@kkip.pl>:
>
> ...
>>>
>>> Assertion failed: (false&& =A0"Ran out of registers during register
>>> allocation!"), function assignRegOrStackSlotAtInterval, file
>>>
>>> /usr/src/lib/clang/libllvmcodegen/../../../contrib/llvm/lib/CodeGen/Reg=
AllocLinearScan.cpp,
>>> line 1196.
>
> ...
>>
>> Same error here with yesterday's -CURRENT, but not at the same time
>> (the running system was compiled using gcc) :
>
> As with Bartosz, could you please remove the CPU-specific flags from
> make.conf, and try again?

Ok, I'll post the results later (it was the same with -DNDEBUG).

> I guess there is something borked in LLVM's Athlon optimization, so it
> is probably better to not try to tickly those bugs for now.
>
>
>
>> # grep -vE '^#|^$' /etc/make.conf
>> KERNCONF=3DXPC
>> CPUTYPE=3Dathlon-xp
>> CFLAGS=3D-O2 -pipe -march=3Dnative -fomit-frame-pointer
>
> Using CPUTYPE=3D and -march=3D seems a bit redundant. :)

Not with NO_CPU_CFLAGS=3Dyes and NO_CPU_COPTFLAGS=3Dyes (if you want to
use -march=3Dnative, that's the best thing to do).

>
>> clang -c -O2 -pipe -march=3Dnative -fomit-frame-pointer -DIN_GCC
>> -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED =A0-DHAVE_GTHR_DEFAULT
>> -I/usr/src/gnu/lib/libgcc/../../../contrib/gcclibs/include
>> -I/usr/src/gnu/lib/libgcc/../../../contrib/gcc/config
>> -I/usr/src/gnu/lib/libgcc/../../../contrib/gcc -I.
>> -I/usr/src/gnu/lib/libgcc/../../usr.bin/cc/cc_tools -std=3Dgnu99
>> -fvisibility=3Dhidden -DHIDE_EXPORTS -fPIC -fexceptions -D__GLIBC__=3D3
>> -DElfW=3D__ElfN -o unwind-dw2.o
>> /usr/src/gnu/lib/libgcc/../../../contrib/gcc/unwind-dw2.c
>> Assertion failed: (!spillIs.empty()&& =A0"No spill intervals?"),
>> function assignRegOrStackSlotAtInterval, file
>>
>> /usr/src/lib/clang/libllvmcodegen/../../../contrib/llvm/lib/CodeGen/RegA=
llocLinearScan.cpp,
>> line 1287.
>
> I haven't yet seen this one before. =A0If I can reproduce it, I will
> report it upstream, and see if they can come up with a fix.
>

Thanks !

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