[patch] Fix two bugs with -gdwarf-4

[Cary Coutant <ccoutant at google dot com>]

This patch fixes a couple of bugs with -gdwarf-4. One is an ICE that
occurs when there's a particular kind of local typedef in a member
function, and the other caused an unsatisfied reference at link time
caused by moving a locally-scoped type into a type unit.

Bootstrapped and tested on x86_64. OK?

-cary


gcc/ChangeLog:

        * dwarf2out.c (is_nested_in_subprogram): New function.
        (should_move_die_to_comdat): Use it.
        (copy_ancestor_tree): Don't mark DIEs here.
        (copy_decls_walk): Start walk from root of newly-added tree;
        mark DIEs here instead.

gcc/testsuite/ChangeLog:

        * g++.dg/debug/dwarf2/dwarf4-typedef.C: New test.

Attachment: gcc-dwarf4-100621-patch.txt
Description: Text document