[LLVMdev] compiling the full SPEC CPU2000 suite to LLVM bytecode

[Chris Lattner]

On Wed, 30 Aug 2006, Kenneth Hoste wrote:
>>  I use NAG with llvm-gcc4.  What sort of errors do you get?  Did you 
>>  configure llvm-test with the appropriate flags to find it?
> Yes, I did. llvm-test is configured as follows: (in /work/LLVM/1.8/ 
> llvm/project/llvm-test):
> ./configure --with-spec2000=/work/SPEC_CPU2000_1.3_src/benchspec -- 
> without-f2c --with-f95-bin=/work/NAG_f95/bin --with-f95-lib=/work/NAG_f95/lib 
> --with-f95-inc=/work/NAG_f95/lib --with-llvmsrc=/work/LLVM/1.8/llvm 
> --with-llvmobj=/work/LLVM/1.8/llvm

What does this print?

$ grep F95 .../projects/llvm-test/Makefile.config
?
> I then cd into llvm-test/External/SPEC and run make to compile the benchmarks 
> to LLVM bytecode. Make stops with the following error messages:
>
> /work/SPEC_CPU2000_1.3_src/benchspec/CFP2000/189.lucas/src/ 
> lucas_distrib_spec.f90:2995: error: syntax error before ‘(’ token

Very strange.  Have you *looked* at the file?  Does it looks reasonable? 
What's going on on that line?

Have you tried to debug this at all?

> Any further suggestions what might be wrong are welcome... Especially the 
> /lib/NAGWare/... part puzzles me.. I did show with configure where the 
> NAGWare lib dir is located, so why this error?

I don't know, maybe your Makefile.config entries will shed light on this.

>> >  Also, with the new gcc4 frontend, it seems the Fortran issue will 
>> >  disappear in the near future (with the use of gfortran). Is that 
>> >  correct? Or will there
>> >  be other problems?
>>  Someone needs to do the work to test gfortran and fix any problems it runs 
>>  into.  I'm not aware of anyone doing this, though it's probably not hard.
>> 
>
> So, in the future it will be possible to use gcc/g++/gfortran to generate 
> LLVM bytecode?

Yes, if someone does the work.

> If you can give me more specific details on how to test gfortan to emit llvm 
> bytecode, I'll be glad to try it. I'm not all that familiar with LLVM at all, 
> but if I can find the time (which I won't in the next few weeks), I'll be 
> glad to help.

I don't have any specific details to give you, as I haven't tried it 
before.  I would suggest getting LLVM CVS HEAD, llvm-gcc SVN head, and 
then configuring llvm-gcc with gfortran enabled.  See what works and what 
doesn't, debug, fix, submit patch, repeat.

-Chris

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