[LLVMdev] Help needed on debugging llvm

[Anitha Boyapati]

On 6 November 2012 15:39, Duncan Sands <baldrick at free.fr> wrote:

> Hi Anitha,
>
>
>      it's surely just that dragonegg doesn't have any support for this
>> builtin.
>>
>> ok. Just verified that Target.cpp and x86_builtins do not have iceil
>> support.
>> I have this tricky situation - I use dragonegg generated LLVM IR as input
>> to
>> clang for some analysis (well it is clang++ actually). Understably,clang
>> cribs
>> looking at __builtin_iceil. Any idea how to resolve that as well?
>>
>
> adding dragonegg support for iceil would solve both problems.
>

Cool. http://llvm.org/bugs/show_bug.cgi?id=14270

Thanks Duncan.

- Anitha


>
> Ciao, Duncan.
>
>  clang++   -O2 -march=bdver2 -mno-fma -save-temps  -mfma4
>> -ffp-contract=fast
>> -DSPEC_CPU_LP64        Compute.o ComputeList.o ComputeNonbondedUtil.o
>> LJTable.o
>> Molecule.o Patch.o PatchList.o ResultSet.o SimParameters.o erf.o
>> spec_namd.o                     -o namd
>> spec_namd.o: In function `main':
>> spec_namd.ll:(.text+0x2a3): undefined reference to `__builtin_iceil'
>>
>>     Please open a bug report with a minimal test case
>>
>> Will do. Thanks
>> -Anitha
>>
>>     Ciao, Duncan.
>>
>>       when compiled
>>
>>         with dragonegg using -ffast-math option. My dragonegg is built
>> with
>>         gcc-4.7.0
>>         (I am compiling namd spec benchmark here again).
>>         Any idea?
>>         g++ -march=bdver2 -save-temps
>>         -fplugin=/home/anboyapa/__**install/bin/dragonegg.so
>>         -O2 -march=bdver2 -save-temps
>>         -fplugin=/home/anboyapa/__**install/bin/dragonegg.so
>>
>>         -mno-fma -mfma4 -ffast-math  -DSPEC_CPU_LP64        Compute.o
>> ComputeList.o
>>         ComputeNonbondedUtil.o LJTable.o Molecule.o Patch.o PatchList.o
>> ResultSet.o
>>         SimParameters.o erf.o spec_namd.o                     -o namd
>>         spec_namd.o: In function `main':
>>         spec_namd.C:(.text+0x2a3): undefined reference to
>> `__builtin_iceil'
>>         collect2: error: ld returned 1 exit status
>>         specmake: *** [namd] Error 1
>>
>>
>>         On 5 November 2012 14:32, Duncan Sands <baldrick at free.fr
>>         <mailto:baldrick at free.fr>
>>         <mailto:baldrick at free.fr <mailto:baldrick at free.fr>>> wrote:
>>
>>              Hi Anitha,
>>
>>
>>         http://llvm.org/bugs/show_bug.**____cgi?id=14185<http://llvm.org/bugs/show_bug.____cgi?id=14185>
>>         <http://llvm.org/bugs/show_**bug.__cgi?id=14185<http://llvm.org/bugs/show_bug.__cgi?id=14185>
>> >
>>
>>                  <http://llvm.org/bugs/show___**bug.cgi?id=14185<http://llvm.org/bugs/show___bug.cgi?id=14185>
>>
>>         <http://llvm.org/bugs/show_**bug.cgi?id=14185<http://llvm.org/bugs/show_bug.cgi?id=14185>
>> >>
>>                  I am stuck on analysis. Does any one have alternate
>> suggestions
>>         on debugging
>>                  llvm? (Please refer to comments for the work done so far)
>>
>>
>>              try to reduce a small standalone testcase which is an LLVM
>> IR (.ll)
>>         file.
>>
>>              Ciao, Duncan.
>>
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>> >>
>>
>>
>>
>>
>>
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