Fix some dwarf2out.c ICEs for Ada

[Zack Weinberg]

On Sun, Jan 20, 2002 at 06:42:44PM -0500, Richard Kenner wrote:
> Sun Jan 20 18:40:14 2002  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
> 
> 	* dwarf2out.c (loc_descriptor_from_tree): Add TRUTH_*_EXPR cases.
> 	(gen_struct_or_union_type_die): Don't SIGSEGV if no TYPE_STUB_DECL
> 	in incomplete case.

The DW_OP_{and,or,xor,not} operations are bitwise operations, are you
sure you are accurately modeling the TRUTH_*_EXPR trees by blindly
mapping them like this?

zw