constants.c (build_constant_data_ref): Make sure we only build one copy of the decl for the constant pool.

2008-10-14  Andrew Haley  <aph@redhat.com>

        * constants.c (build_constant_data_ref): Make sure we only build
        one copy of the decl for the constant pool.

From-SVN: r141133

1 files changed, 17 insertions, 13 deletions

diff --git a/gcc/java/constants.c b/gcc/java/constants.c
index 265557e..526d9c7 100644
--- a/gcc/java/constants.c
+++ b/gcc/java/constants.c
@@ -448,21 +448,25 @@ build_constant_data_ref (bool indirect)
     }
   else
     {
-      tree type, decl;
       tree decl_name = mangled_classname ("_CD_", output_class);
+      tree decl = IDENTIFIER_GLOBAL_VALUE (decl_name);
 
-      /* Build a type with unspecified bounds.  The will make sure
-	 that targets do the right thing with whatever size we end
-	 up with at the end.  Using bounds that are too small risks
-	 assuming the data is in the small data section.  */
-      type = build_array_type (ptr_type_node, NULL_TREE);
-
-      /* We need to lay out the type ourselves, since build_array_type
-	 thinks the type is incomplete.  */
-      layout_type (type);
-
-      decl = build_decl (VAR_DECL, decl_name, type);
-      TREE_STATIC (decl) = 1;
+      if (! decl)
+	{
+	  /* Build a type with unspecified bounds.  The will make sure
+	     that targets do the right thing with whatever size we end
+	     up with at the end.  Using bounds that are too small risks
+	     assuming the data is in the small data section.  */
+	  tree type = build_array_type (ptr_type_node, NULL_TREE);
+
+	  /* We need to lay out the type ourselves, since build_array_type
+	     thinks the type is incomplete.  */
+	  layout_type (type);
+
+	  decl = build_decl (VAR_DECL, decl_name, type);
+	  TREE_STATIC (decl) = 1;
+	  IDENTIFIER_GLOBAL_VALUE (decl_name) = decl;
+	}
 
       return decl;
     }