decl.c (gfc_match_end): Check that the block name starts with "block@".

2011-04-26  Thomas Koenig  <tkoenig@gcc.gnu.org>

	* decl.c (gfc_match_end):  Check that the block name starts
	with "block@".
	* parse.c (gfc_build_block_ns):  Make block names unique by
	numbering them.

From-SVN: r172990

gcc/fortran/ChangeLog

 2011-04-26  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
+	* decl.c (gfc_match_end):  Check that the block name starts
+	with "block@".
+	* parse.c (gfc_build_block_ns):  Make block names unique by
+	numbering them.
+
+2011-04-26  Thomas Koenig  <tkoenig@gcc.gnu.org>
+
 	* frontend-passes.c (inserted_block):  New variable.
 	(changed_statement):  Likewise.
 	(create_var):  Encase statement to be operated on in a BLOCK.

gcc/fortran/decl.c

@@ -5746,7 +5746,7 @@ gfc_match_end (gfc_statement *st)
     {
     case COMP_ASSOCIATE:
     case COMP_BLOCK:
-      if (!strcmp (block_name, "block@"))
+      if (!strncmp (block_name, "block@", strlen("block@")))
 	block_name = NULL;
       break;
 

gcc/fortran/parse.c

@@ -3135,6 +3135,7 @@ gfc_namespace*
 gfc_build_block_ns (gfc_namespace *parent_ns)
 {
   gfc_namespace* my_ns;
+  static int numblock = 1;
 
   my_ns = gfc_get_namespace (parent_ns, 1);
   my_ns->construct_entities = 1;
@@ -3149,8 +3150,10 @@ gfc_build_block_ns (gfc_namespace *parent_ns)
   else
     {
       gfc_try t;
+      char buffer[20];  /* Enough to hold "block@2147483648\n".  */
 
-      gfc_get_symbol ("block@", my_ns, &my_ns->proc_name);
+      snprintf(buffer, sizeof(buffer), "block@%d", numblock++);
+      gfc_get_symbol (buffer, my_ns, &my_ns->proc_name);
       t = gfc_add_flavor (&my_ns->proc_name->attr, FL_LABEL,
 			  my_ns->proc_name->name, NULL);
       gcc_assert (t == SUCCESS);