[RFA 26/42] Remove free_pendings

[Tom Tromey <tom at tromey dot com>]

buildsym.c currently keeps a free list of "struct pending"s.  However,
this didn't seem necessary to me, and so this patch removes the free
list.

gdb/ChangeLog
2018-05-22  Tom Tromey  <tom@tromey.com>

	* buildsym.c (free_pendings): Remove.
	(add_symbol_to_list, scoped_free_pendings)
	(finish_block_internal, buildsym_init): Update.
---
 gdb/ChangeLog  |  6 ++++++
 gdb/buildsym.c | 28 +++-------------------------
 2 files changed, 9 insertions(+), 25 deletions(-)

diff --git a/gdb/buildsym.c b/gdb/buildsym.c
index 516dac6b7e..40176298a2 100644
--- a/gdb/buildsym.c
+++ b/gdb/buildsym.c
@@ -258,10 +258,6 @@ struct buildsym_compunit
 
 static struct buildsym_compunit *buildsym_compunit;
 
-/* List of free `struct pending' structures for reuse.  */
-
-static struct pending *free_pendings;
-
 /* List of blocks already made (lexical contexts already closed).
    This is used at the end to make the blockvector.  */
 
@@ -303,16 +299,7 @@ add_symbol_to_list (struct symbol *symbol, struct pending **listhead)
      don't have a link with room in it, add a new link.  */
   if (*listhead == NULL || (*listhead)->nsyms == PENDINGSIZE)
     {
-      if (free_pendings)
-	{
-	  link = free_pendings;
-	  free_pendings = link->next;
-	}
-      else
-	{
-	  link = XNEW (struct pending);
-	}
-
+      link = XNEW (struct pending);
       link->next = *listhead;
       *listhead = link;
       link->nsyms = 0;
@@ -360,13 +347,6 @@ scoped_free_pendings::~scoped_free_pendings ()
 {
   struct pending *next, *next1;
 
-  for (next = free_pendings; next; next = next1)
-    {
-      next1 = next->next;
-      xfree ((void *) next);
-    }
-  free_pendings = NULL;
-
   for (next = file_symbols; next != NULL; next = next1)
     {
       next1 = next->next;
@@ -488,13 +468,12 @@ finish_block_internal (struct symbol *symbol,
   if (static_link != NULL)
     objfile_register_static_link (objfile, block, static_link);
 
-  /* Now "free" the links of the list, and empty the list.  */
+  /* Now free the links of the list, and empty the list.  */
 
   for (next = *listhead; next; next = next1)
     {
       next1 = next->next;
-      next->next = free_pendings;
-      free_pendings = next;
+      xfree (next);
     }
   *listhead = NULL;
 
@@ -1767,7 +1746,6 @@ buildsym_init ()
 {
   /* Ensure the scoped_free_pendings destructor was called after
      the last time.  */
-  gdb_assert (free_pendings == NULL);
   gdb_assert (file_symbols == NULL);
   gdb_assert (global_symbols == NULL);
   gdb_assert (buildsym_compunit == NULL);
-- 
2.13.6