http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53021
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2012-04-17 19:57:44
UTC ---
unique_base_value calls gen_rtx_ADDRESS which overrides
dwarf_file_data created by lookup_filename in dwarf2out.c:
/* Check to see if the file name that was searched on the previous
call matches this file name. If so, return the index. */
if (file_table_last_lookup
&& (file_name == file_table_last_lookup->filename
|| filename_cmp (file_table_last_lookup->filename, file_name) == 0))
return file_table_last_lookup;
/* Didn't match the previous lookup, search the table. */
slot = htab_find_slot_with_hash (file_table, file_name,
htab_hash_string (file_name), INSERT);
if (*slot)
return (struct dwarf_file_data *) *slot;
created = ggc_alloc_dwarf_file_data ();
created->filename = file_name;
created->emitted_number = 0;
*slot = created;
return created;
However, return of htab_find_slot_with_hash wasn't marked with
GTY(()) and file_table_last_lookup was never set.
