Re: Clang now builds world and kernel, on i386 and amd64

From: Olivier Smedts <olivier_at_gid0.org>
Date: Mon, 27 Sep 2010 14:30:18 +0200
2010/9/27 Dimitry Andric <dim_at_freebsd.org>:
> On 2010-09-27 09:32, Olivier Smedts wrote:
>>
>> 2010/9/23 Bartosz Stec<admin_at_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?

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=XPC
>> CPUTYPE=athlon-xp
>> CFLAGS=-O2 -pipe -march=native -fomit-frame-pointer
>
> Using CPUTYPE= and -march= seems a bit redundant. :)

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

>
>> 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.
>

Thanks !

-- 
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Received on Mon Sep 27 2010 - 10:30:21 UTC

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