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Date:      Mon, 27 Sep 2010 12:38:55 +0200
From:      Dimitry Andric <dim@FreeBSD.org>
To:        Olivier Smedts <olivier@gid0.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:  <4CA0743F.8050408@FreeBSD.org>
In-Reply-To: <AANLkTikD__CJy88CAtV2d7Tso20dG5OFtVLs845F%2Bx3X@mail.gmail.com>
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>

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On 2010-09-27 09:32, Olivier Smedts wrote:
> 2010/9/23 Bartosz Stec<admin@kkip.pl>:
...
>> Assertion failed: (false&&  "Ran out of registers during register
>> allocation!"), function assignRegOrStackSlotAtInterval, file
>> /usr/src/lib/clang/libllvmcodegen/../../../contrib/llvm/lib/CodeGen/RegAllocLinearScan.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?

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=XPC
> CPUTYPE=athlon-xp
> CFLAGS=-O2 -pipe -march=native -fomit-frame-pointer

Using CPUTYPE= and -march= seems a bit redundant. :)


> clang -c -O2 -pipe -march=native -fomit-frame-pointer -DIN_GCC
> -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED  -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=gnu99
> -fvisibility=hidden -DHIDE_EXPORTS -fPIC -fexceptions -D__GLIBC__=3
> -DElfW=__ElfN -o unwind-dw2.o
> /usr/src/gnu/lib/libgcc/../../../contrib/gcc/unwind-dw2.c
> Assertion failed: (!spillIs.empty()&&  "No spill intervals?"),
> function assignRegOrStackSlotAtInterval, file
> /usr/src/lib/clang/libllvmcodegen/../../../contrib/llvm/lib/CodeGen/RegAllocLinearScan.cpp,
> line 1287.

I haven't yet seen this one before.  If I can reproduce it, I will
report it upstream, and see if they can come up with a fix.



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