Exception propagation problem on IA-64/Linux

[Richard Henderson]

On Thu, Oct 27, 2005 at 10:21:08PM +0200, Eric Botcazou wrote:
> We have run into an exception propagation problem on IA-64/Linux.  An 
> admittedly contrived C++ testcase is attached.

I'm not sure that the C++ testcase is in fact valid.  A lawyer would
have to actually weigh in on that claim.

> The problem pertains to the type_info objects emitted for the exceptions: 
> while the exceptions in t.C and u.C are unrelated, these objects are the 
> same.  On IA-32 they are local to the translation unit, but on IA-64 they are 
> DECL_ONE_ONLY because of dw2_force_const_mem.

Try again on ia32 with -fpic.  That should go through
dw2_force_const_mem just the same.

> Thoughts?

I don't think this is an EH problem at all.  I think the test case
is either invalid, or that the bug is in the C++ front end in how we 
mangle (or not) the local class.


r~