[LLVMdev] bugpoint / cbe Problems

[David Greene]

On Wednesday 16 July 2008 13:28, Anton Korobeynikov wrote:
> Hello, David.
>
> > After hacking around in the CBE output I managed to compile it with
> > gcc, only to discover that gcc 4.1.2 has the SAME bug LLVM does with
> > respect to alignment.
>
> Automatic stack realignment was atted to X86 backend ~3 months ago.
> Everything should work with LLVM. If not - please fill out a PR. AFAIR,
> automatic stack realignment still does not land into gcc mainline (it's on
> maybe 8th or 9th iteration or so).

Right.  The object is on the stack.  This is a fortran code where all sorts of
interesting things with pointers can be done behind your back.  I'll try to
write a simple C test that has the equivalent problem.

> > I don't see a way to run opt directly with bugpoint.  It seems to want to
> > go through the CBE, which has the problems I mentioned before (generating
> > syntactically-incorrect C).
>
> Please file a PR.

It's on my list.  :)

                                                     -Dave