Re: [pypy-dev] llvm2 update

Hi Chris! Chris Lattner wrote: [snip]

This is generally done with global variables. The C++ front-end basically generates code like this:

C++: throw 42;

Pseudo LLVM code: int *E = allocate_exception_memory(4); *E = 42; add_to_current_exception_stack(E); unwind

I imagine that something similar should work for pypy.

This is indeed pretty much what I did in genllvm1 (note that we're already writing our second LLVM backend :-). It's even a bit easier since we don't need an exception stack but only one single exception. One problem is that exception matching is not entirely straightforward although this is a property of the PyPy model and has nothing to do with LLVM per se. Regards, Carl Friedrich