Passing attributes to RTX

[Gobaan_Raveendran at amis dot com]

Hello all,

While prototyping a port of gcc I think that the RTX is lacking some
information needed to generate machine dependent files. The expression
trees have the correct information and I can likely hack in a quick fix to
pass that information down to the backend. However, I just want to make
sure I am not doing something completely wrong.

Basically given the following code,

void main(T x)
{
  T * pt; //pointer to type T
  *pt = x
}

now I need the RTX to know about type T (specifically its qualifiers as I
am doing this for the named address space branch), I changed the backend to
encode these into the RTX generated by the VAR_DECL and PARM_DECL nodes,
however, I am not sure if it is suppose to be encoded in the INDIRECT_REF
node as pt is theoretically a pointer to T.

I just quickly hacked this information into expand_expr_real_1 in expr.c,
however this may be the incorrect approach, is there any specific location
where I should be modifying RTX attributes and when expand_expr_real_1 is
done should the RTX returned have all the attributes (that can be deduced
from the expression tree) set?

- Thanks for the help, Gobi