REG_STRUCT_HAS_ADDR

[Andrew Cagney]

> That's a good strategy.  However, making this stabs-specific seems
> wrong to me.  The new method will simply indicate whether the ABI
> silently uses pass by reference instead of pass by value for function
> argument of a certain type.  Therefore I don't think we should put
> STABS in the name.  What about PASS_ARGUMENT_BY_REFERENCE?  I'm going
> to drop the GCC_P argument too, since nobody is using it.  I'll post a
> patch later today.

To correctly determine if an arument is passed by reference requires the 
complete function prototype (same problem as push dummy call).  I think, 
rather than change the interface (will anyone actually fix/use that 
info?) this method should be burried as stabs only.  Leave the problem 
of defining/implementing a new interface to someone that needs it.

Andrew