We haven't been using this for a looong time. It never even gets defined.
Removed and committed to branch.
Aldy
commit a8076b015cad17538e369c153f8c7cf888433840
Author: Aldy Hernandez <al...@redhat.com>
Date: Tue Jan 27 11:24:53 2015 -0800
* dwarf2out.c (file_table_last_lookup): Remove unset variable.
(lookup_filename): Remove file_table_last_lookup use.
(dwarf2out_c_finalize): Same.
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index e3ccda2..188710e 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -3008,9 +3008,6 @@ static GTY(()) struct dwarf_file_data * last_emitted_file;
/* Number of internal labels generated by gen_internal_sym(). */
static GTY(()) int label_num;
-/* Cached result of previous call to lookup_filename. */
-static GTY(()) struct dwarf_file_data * file_table_last_lookup;
-
static GTY(()) vec<die_arg_entry, va_gc> *tmpl_value_parm_die_table;
/* Instances of generic types for which we need to generate debug
@@ -21729,9 +21726,7 @@ dwarf_file_hasher::hash (dwarf_file_data *p)
section) and references to those files numbers (in the .debug_srcinfo
and.debug_macinfo sections). If the filename given as an argument is not
found in our current list, add it to the list and assign it the next
- available unique index number. In order to speed up searches, we remember
- the index of the filename was looked up last. This handles the majority of
- all searches. */
+ available unique index number. */
static struct dwarf_file_data *
lookup_filename (const char *file_name)
@@ -25199,7 +25194,6 @@ dwarf2out_c_finalize (void)
poc_label_num = 0;
last_emitted_file = NULL;
label_num = 0;
- file_table_last_lookup = NULL;
tmpl_value_parm_die_table = NULL;
generic_type_instances = NULL;
frame_pointer_fb_offset = 0;
