re PR fortran/16336 (ICE with common block in module)

PR fortran/16336
* decl.c (gfc_match_save): Use-associated common block
doesn't collide.
* gfortran.h (gfc_common_head): Add new field 'name'.
Fix typo in comment after #endif.
* match.c (gfc_get_common): Add new argument from_common,
mangle name if flag is set, fill in new field in structure
gfc_common_head.
(match_common): Set new arg in call to gfc_get_common,
use-associated common block doesn't collide.
* match.h (gfc_get_common): Adapt prototype.
* module.c (load_commons): Set new arg in call to
gfc_get_common.
* symbol.c (free_common_tree): New function.
(gfc_free_namespace): Call new function.
* trans-common.c (several functions): Remove argument
'name', use name from gfc_common_head instead.

From-SVN: r84476

1 files changed, 17 insertions, 0 deletions

diff --git a/gcc/fortran/symbol.c b/gcc/fortran/symbol.c
index 9208d22..3159436 100644
--- a/gcc/fortran/symbol.c
+++ b/gcc/fortran/symbol.c
@@ -2139,6 +2139,22 @@ gfc_commit_symbols (void)
 }
 
 
+/* Recursive function that deletes an entire tree and all the common
+   head structures it points to.  */
+
+static void
+free_common_tree (gfc_symtree * common_tree)
+{
+  if (common_tree == NULL)
+    return;
+
+  free_common_tree (common_tree->left);
+  free_common_tree (common_tree->right);
+
+  gfc_free (common_tree);
+}  
+
+
 /* Recursive function that deletes an entire tree and all the user
    operator nodes that it contains.  */
 
@@ -2216,6 +2232,7 @@ gfc_free_namespace (gfc_namespace * ns)
 
   free_sym_tree (ns->sym_root);
   free_uop_tree (ns->uop_root);
+  free_common_tree (ns->common_root);
 
   for (cl = ns->cl_list; cl; cl = cl2)
     {