openbsd-ports/lang/egcs/stable/patches/patch-gcc_c-decl_c
espie aa633b5bdb speed-up look-up of incomplete structs. Patch by Stan Shebs.
Noticeable effect on kernel compilation speed (a few percents)
2002-06-03 14:37:19 +00:00

90 lines
3.2 KiB
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$OpenBSD: patch-gcc_c-decl_c,v 1.1 2002/06/03 14:37:19 espie Exp $
--- gcc/c-decl.c.orig Fri May 3 14:07:04 2002
+++ gcc/c-decl.c Mon Jun 3 15:44:06 2002
@@ -216,9 +216,9 @@ struct binding_level
/* Nonzero means make a BLOCK if this level has any subblocks. */
char keep_if_subblocks;
- /* Number of decls in `names' that have incomplete
- structure or union types. */
- int n_incomplete;
+ /* List of decls in `names' that have incomplete structure or
+ union types. */
+ tree incomplete_list;
/* A list of decls giving the (reversed) specified order of parms,
not including any forward-decls in the parmlist.
@@ -245,7 +245,7 @@ static struct binding_level *global_bind
/* Binding level structures are initialized by copying this one. */
static struct binding_level clear_binding_level
- = {NULL, NULL, NULL, NULL, NULL, NULL_BINDING_LEVEL, 0, 0, 0, 0, 0, 0,
+ = {NULL, NULL, NULL, NULL, NULL, NULL_BINDING_LEVEL, 0, 0, 0, 0, 0, NULL,
NULL};
/* Nonzero means unconditionally make a BLOCK for the next level pushed. */
@@ -2560,7 +2560,7 @@ pushdecl (x)
element = TREE_TYPE (element);
if (TREE_CODE (element) == RECORD_TYPE
|| TREE_CODE (element) == UNION_TYPE)
- ++b->n_incomplete;
+ b->incomplete_list = tree_cons (NULL_TREE, x, b->incomplete_list);
}
}
@@ -3045,6 +3045,7 @@ mark_binding_level (arg)
ggc_mark_tree (level->blocks);
ggc_mark_tree (level->this_block);
ggc_mark_tree (level->parm_order);
+ ggc_mark_tree (level->incomplete_list);
}
}
@@ -5880,11 +5881,14 @@ finish_struct (t, fieldlist, attributes)
/* If this structure or union completes the type of any previous
variable declaration, lay it out and output its rtl. */
- if (current_binding_level->n_incomplete != 0)
+ if (current_binding_level->incomplete_list != NULL_TREE)
{
- tree decl;
- for (decl = current_binding_level->names; decl; decl = TREE_CHAIN (decl))
- {
+ tree prev = NULL_TREE;
+
+ for (x = current_binding_level->incomplete_list; x; x = TREE_CHAIN (x))
+ {
+ tree decl = TREE_VALUE (x);
+
if (TYPE_MAIN_VARIANT (TREE_TYPE (decl)) == TYPE_MAIN_VARIANT (t)
&& TREE_CODE (decl) != TYPE_DECL)
{
@@ -5894,8 +5898,11 @@ finish_struct (t, fieldlist, attributes)
rest_of_decl_compilation (decl, NULL, toplevel, 0);
if (! toplevel)
expand_decl (decl);
- if (--current_binding_level->n_incomplete == 0)
- break;
+ /* Unlink X from the incomplete list. */
+ if (prev)
+ TREE_CHAIN (prev) = TREE_CHAIN (x);
+ else
+ current_binding_level->incomplete_list = TREE_CHAIN (x);
}
else if (!COMPLETE_TYPE_P (TREE_TYPE (decl))
&& TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
@@ -5914,8 +5921,11 @@ finish_struct (t, fieldlist, attributes)
if (! toplevel)
expand_decl (decl);
}
- if (--current_binding_level->n_incomplete == 0)
- break;
+ /* Unlink X from the incomplete list. */
+ if (prev)
+ TREE_CHAIN (prev) = TREE_CHAIN (x);
+ else
+ current_binding_level->incomplete_list = TREE_CHAIN (x);
}
}
}