[ada] can't build g-awk.adb in gcc cvs trunk 20041212 on sparc-linux: GCC error: in expand_expr_addr_expr_1, at expr.c:6047, Error detected at g-awk.adb:1316:24

[Richard Kenner]

    The problematic expression reaches expand_expr_addr_expr_1 unmodified
    because it was accepted at least once by handled_component_p at an
    earlier stage (e.g. the gimplifier).

OK, now I understand.  Unfortunately, *not* "accepting" it is also
problematic since the gimplifier, if it doesn't accept that, will make a
temporary for the result of the VIEW_CONVERT_EXPR, so the ADDR_EXPR would be
returning the address of that temporary and not the operand of the V_C_E,
which is exactly what you *don't* want to happen for TYPE_ALIGN_OK.

So this maybe indeed be the single exception to the correspondance between
get_inner_refrence and handled_component_p.  I don't particularly care
for that, but if there's no other way, we should at least document it
*very* clearly ...

This is tricky stuff!