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From: Michael Elizabeth Chastain <mec@shout.net>
Subject: Re: debug/9039: [3.4 regression] ICE, anonymous union, gen_decl_die, dwarf2out.c:11974
Reply-To: Michael Elizabeth Chastain <mec@shout.net>
X-SW-Source: 2003-01/txt/msg00104.txt.bz2
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The following reply was made to PR debug/9039; it has been noted by GNATS.

From: Michael Elizabeth Chastain <mec@shout.net>
To: ehrhardt@mathematik.uni-ulm.de, gcc-bugs@gcc.gnu.org,
   gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org
Cc:  
Subject: Re: debug/9039: [3.4 regression] ICE, anonymous union, gen_decl_die, dwarf2out.c:11974
Date: Wed, 1 Jan 2003 19:39:00 -0600

 It did not happen for me with gcc gcc-3_3-branch checked out on
 2002-12-18 or 2002-12-24 or 2002-12-31 (native i686-pc-linux-gnu
 with -gdwarf-2).
 
 It started happening for me on the trunk between 2002-12-18
 and 2002-12-24.
 
 I suspect the patch below but I haven't done that cool binary
 search regression build trick.
 
 Michael C
 
   2002-12-18  Jason Merrill  <jason@redhat.com>
 
         Handle anonymous unions at the tree level.
         C++ ABI change: Mangle anonymous unions using the name of their
         first named field (by depth-first search).  Should not cause
         binary compatibility problems, though, as the compiler previously
         didn't emit anything for affected unions.
         * cp-tree.def (ALIAS_DECL): New tree code.
         * decl2.c (build_anon_union_vars): Build ALIAS_DECLs.  Return the
         first field, not the largest.
         (finish_anon_union): Don't mess with RTL.  Do set DECL_ASSEMBLER_NAME,
         push the decl, and write it out at namespace scope.
         * decl.c (lookup_name_real): See through an ALIAS_DECL.
         (pushdecl): Add namespace bindings for ALIAS_DECLs.
         * rtti.c (unemitted_tinfo_decl_p): Don't try to look at the name
         of a decl which doesn't have one.
         * typeck.c (build_class_member_access_expr): Don't recurse if
         we already have the type we want.