Re: [PATCH]: Fix PR tree-optimization/21407

[Daniel Berlin <dberlin at dberlin dot org>]

On Mon, 2005-05-09 at 20:29 -0700, Mark Mitchell wrote:
> Daniel Berlin wrote:
> > On Mon, 2005-05-09 at 22:15 -0400, Daniel Berlin wrote:
> > 
> >>Whee.
> >>We pass the address of a derived class to the a call, then upcast it
> >>back to the base class, effectively giving you the structure which
> >>wasn't passed.  You can't do something like this in C, luckily :).
> >>
> >>Thus, we can only assume things about address of a structure field when
> >>their is not inheritance involved in the thing we are taking the address
> >>of.
> >>Thus, a TYPE_BINFO check is necessary on the thing whose address if
> >>being taken.
> 
> Every class type has TYPE_BINFO.  So, you're not really checking for 
> inheritance; you're just checking that it's a class.

So i guess i'm looking for BINFO_N_BASE_BINFOS != 0?

> 
> >>Where do we put execute test cases for C++?  There is no g
> >>++.torture/execute or anything of the sort, and I don't see any.
> 
> g++.dg
> 

Yeah, i was grepping for dg-run, instead of "dg-do run"