gcc/

[pf3gnuchains/gcc-fork.git] / gcc / tree-dfa.c

diff --git a/gcc/tree-dfa.c b/gcc/tree-dfa.c
index e6b593e..f7f4243 100644 (file)
--- a/gcc/tree-dfa.c
+++ b/gcc/tree-dfa.c
@@ -635,14 +635,12 @@ find_vars_r (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED)
 tree 
 referenced_var_lookup (unsigned int uid)
 {
-  struct int_tree_map *h, in;
+  tree h;
+  struct tree_decl_minimal in;
   in.uid = uid;
-  h = (struct int_tree_map *)
-       htab_find_with_hash (gimple_referenced_vars (cfun), &in, uid);
+  h = (tree) htab_find_with_hash (gimple_referenced_vars (cfun), &in, uid);
   gcc_assert (h || uid == 0);
-  if (h)
-    return h->to;
-  return NULL_TREE;
+  return h;
 }
 
 /* Check if TO is in the referenced_vars hash table and insert it if not.  
@@ -651,29 +649,23 @@ referenced_var_lookup (unsigned int uid)
 bool
 referenced_var_check_and_insert (tree to)
 { 
-  struct int_tree_map *h, in;
-  void **loc;
+  tree h, *loc;
+  struct tree_decl_minimal in;
   unsigned int uid = DECL_UID (to);
 
   in.uid = uid;
-  in.to = to;
-  h = (struct int_tree_map *) htab_find_with_hash (gimple_referenced_vars (cfun),
-                                                  &in, uid);
-
+  h = (tree) htab_find_with_hash (gimple_referenced_vars (cfun), &in, uid);
   if (h)
     {
       /* DECL_UID has already been entered in the table.  Verify that it is
         the same entry as TO.  See PR 27793.  */
-      gcc_assert (h->to == to);
+      gcc_assert (h == to);
       return false;
     }
 
-  h = GGC_NEW (struct int_tree_map);
-  h->uid = uid;
-  h->to = to;
-  loc = htab_find_slot_with_hash (gimple_referenced_vars (cfun),
-                                 h, uid, INSERT);
-  *(struct int_tree_map **)  loc = h;
+  loc = (tree *) htab_find_slot_with_hash (gimple_referenced_vars (cfun),
+                                          &in, uid, INSERT);
+  *loc = to;
   return true;
 }
 
@@ -683,15 +675,12 @@ referenced_var_check_and_insert (tree to)
 tree 
 gimple_default_def (struct function *fn, tree var)
 {
-  struct int_tree_map *h, in;
+  struct tree_decl_minimal ind;
+  struct tree_ssa_name in;
   gcc_assert (SSA_VAR_P (var));
-  in.uid = DECL_UID (var);
-  h = (struct int_tree_map *) htab_find_with_hash (DEFAULT_DEFS (fn),
-                                                  &in,
-                                                   DECL_UID (var));
-  if (h)
-    return h->to;
-  return NULL_TREE;
+  in.var = (tree)&ind;
+  ind.uid = DECL_UID (var);
+  return (tree) htab_find_with_hash (DEFAULT_DEFS (fn), &in, DECL_UID (var));
 }
 
 /* Insert the pair VAR's UID, DEF into the default_defs hashtable.  */
@@ -699,37 +688,29 @@ gimple_default_def (struct function *fn, tree var)
 void
 set_default_def (tree var, tree def)
 { 
-  struct int_tree_map in;
-  struct int_tree_map *h;
+  struct tree_decl_minimal ind;
+  struct tree_ssa_name in;
   void **loc;
 
   gcc_assert (SSA_VAR_P (var));
-  in.uid = DECL_UID (var);
-  if (!def && gimple_default_def (cfun, var))
+  in.var = (tree)&ind;
+  ind.uid = DECL_UID (var);
+  if (!def)
     {
       loc = htab_find_slot_with_hash (DEFAULT_DEFS (cfun), &in,
             DECL_UID (var), INSERT);
+      gcc_assert (*loc);
       htab_remove_elt (DEFAULT_DEFS (cfun), *loc);
       return;
     }
-  gcc_assert (!def || TREE_CODE (def) == SSA_NAME);
+  gcc_assert (TREE_CODE (def) == SSA_NAME && SSA_NAME_VAR (def) == var);
   loc = htab_find_slot_with_hash (DEFAULT_DEFS (cfun), &in,
                                   DECL_UID (var), INSERT);
 
   /* Default definition might be changed by tail call optimization.  */
-  if (!*loc)
-    {
-      h = GGC_NEW (struct int_tree_map);
-      h->uid = DECL_UID (var);
-      h->to = def;
-      *(struct int_tree_map **)  loc = h;
-    }
-   else
-    {
-      h = (struct int_tree_map *) *loc;
-      SSA_NAME_IS_DEFAULT_DEF (h->to) = false;
-      h->to = def;
-    }
+  if (*loc)
+    SSA_NAME_IS_DEFAULT_DEF (*(tree *) loc) = false;
+  *(tree *) loc = def;
 
    /* Mark DEF as the default definition for VAR.  */
    SSA_NAME_IS_DEFAULT_DEF (def) = true;
@@ -774,7 +755,7 @@ void
 remove_referenced_var (tree var)
 {
   var_ann_t v_ann;
-  struct int_tree_map in;
+  struct tree_decl_minimal in;
   void **loc;
   unsigned int uid = DECL_UID (var);
 
@@ -784,10 +765,8 @@ remove_referenced_var (tree var)
   var->base.ann = NULL;
   gcc_assert (DECL_P (var));
   in.uid = uid;
-  in.to = var;
   loc = htab_find_slot_with_hash (gimple_referenced_vars (cfun), &in, uid,
                                  NO_INSERT);
-  ggc_free (*loc);
   htab_clear_slot (gimple_referenced_vars (cfun), loc);
 }