[LLVMdev] GC infrastructure checked in

[Carl Friedrich Bolz]

Gordon Henriksen wrote:
>> Hm, summary:
>>
>>    pypy-llvm-backend with llvm's codegen
>>  < pypy-c-backend with GCC
>>  < pypy-llvm-backend using llvm's C backend and then GCC
> 
> I wonder what the impact of using llvm-gcc instead of GCC is in this 
> final pipeline. If that actually works, you could indeed eliminate the 
> shadow stack here as well, since llvm-gcc has extensions to emit gcroot 
> intrinsic calls. It's currently hardwired to the shadow-stack codegen, 
> but that's very fixable.

How would that help? Using llvm-gcc would still give you LLVM's code 
generator which seems to be not optimal for what PyPy does (for whatever 
  reason).

Besides, PyPy cannot get rid of its own shadow-stack implementation as 
long as LLVM is not the leading compiler on most platforms :-).

Cheers,

Carl Friedrich Bolz