different address spaces (was Re: internal compiler error atdwarf2out.c:8362)

[James E Wilson]

Paul Schlie wrote:
> - Might it be possible to introduce and use by convention a new macro which
>   will always wrap a new pointer in a mem expression with attributes copied
>   from the previous mem/symbol's reference enforced?

This is already an easy function call.  I don't see how adding a macro 
makes it easier to remember to call the function.  If you have a 
concrete suggestion, then you are welcome to post it.

> - One of the things that's been eluding me, is that I can't seem to find
>   where literal string constant mem references aren't being properly
>   declared and/or preserved as READONLY/unchanging references, resulting
>   in MEM_READONLY_P failing to identify them; although literal char array
>   references, which seem logically equivalent, do seem to be properly
>   declared/preserved?

The tree to RTL conversion happens in expand_expr.  Just search for 
STRING_CST in that function and then follow the call chain in the 
debugger til you find the place that is trying to set RTX_UNCHANGING_P. 
   Old code set it unconditionally, but current code is a bit more 
complciated.  Maybe there is something wrong with the new code.
-- 
Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com