llvm dev - Aug 2017 - Out Of Memory when compiling complex template in C++

Hello all,

I'm writing regarding bug:

https://bugs.llvm.org/show_bug.cgi?id=27371

I can confirm it happens in 4.0.1 as well. It is *not* a preprocessor
issue, it's clearly codegen/ilgen that breaks existing project
compilation. Are there any plans to get some work on it?

More info: peek memory usage is around ~300 mb when Out-Of-Memory is
casted (on system with 16 gb of RAM). It is reproducible each time
compilation of my project is run. Visual Studio 2015 and Visual Studio 2017
nativily compiles this project without any problems.

The project uses heavily template programming, but all templates are
instanced at least once (so Visual does not skip them).

If you need more information I will be glad to provide them

Best regards,
Piotr Kosek

On 08/20/2017 10:40 AM, Piotr Kosek via llvm-dev wrote:
> Hello all,
>
> I'm writing regarding bug:
>
> https://bugs.llvm.org/show_bug.cgi?id=27371
>
> I can confirm it happens in 4.0.1 as well. It is *not* a preprocessor
> issue, it's clearly codegen/ilgen that breaks existing project
> compilation. Are there any plans to get some work on it?
>
> More info: peek memory usage is around ~300 mb when Out-Of-Memory is
> casted (on system with 16 gb of RAM).
Can you raise your process memory limit and find out how much memory the 
compilation will end up taking?

  -Hal
> It is reproducible each time
> compilation of my project is run. Visual Studio 2015 and Visual Studio 2017
> nativily compiles this project without any problems.
>
> The project uses heavily template programming, but all templates are
> instanced at least once (so Visual does not skip them).
>
> If you need more information I will be glad to provide them
>
> Best regards,
> Piotr Kosek
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
-- 
Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory

On Sun, Aug 20, 2017 at 05:40:31PM +0200, Piotr Kosek via llvm-dev
wrote:
> I'm writing regarding bug:
> 
> https://bugs.llvm.org/show_bug.cgi?id=27371
Just like Tim, I can't even get this to compile without seeing various
errors.

Joerg

On 20 August 2017 at 12:13, Hal Finkel via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> Can you raise your process memory limit and find out how much memory the
> compilation will end up taking?
I get actual source after about 6.5GB, and it seems to be in an
infinite loop now but not growing.

Tim.