Move check_global_declaration from toplev.c to cgraphunit.c

Unfortunately, toplev.c is a kitchen sink of things that do not belong anywhere
in particular. For example, check_global_declarations is only used in
cgraphunit.c. Moving it there allows us to make it static and remove one call
to symtab_node::get.

gcc/ChangeLog:

2015-09-16  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	* toplev.h (check_global_declaration): Remove declaration.
	* toplev.c (check_global_declaration): Move to ...
	* cgraphunit.c: ... here. Make it static and pass a symtab_node *.
	(analyze_functions): Update call.




git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@227835 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 0 insertions, 63 deletions

diff --git a/gcc/toplev.c b/gcc/toplev.c
index 95e4c522e4a..46689ab2860 100644
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -469,69 +469,6 @@ wrapup_global_declarations (tree *vec, int len)
   return output_something;
 }
 
-/* Issue appropriate warnings for the global declaration DECL.  */
-
-void
-check_global_declaration (tree decl)
-{
-  /* Warn about any function declared static but not defined.  We don't
-     warn about variables, because many programs have static variables
-     that exist only to get some text into the object file.  */
-  symtab_node *snode = symtab_node::get (decl);
-  if (TREE_CODE (decl) == FUNCTION_DECL
-      && DECL_INITIAL (decl) == 0
-      && DECL_EXTERNAL (decl)
-      && ! DECL_ARTIFICIAL (decl)
-      && ! TREE_NO_WARNING (decl)
-      && ! TREE_PUBLIC (decl)
-      && (warn_unused_function
-	  || snode->referred_to_p (/*include_self=*/false)))
-    {
-      if (snode->referred_to_p (/*include_self=*/false))
-	pedwarn (input_location, 0, "%q+F used but never defined", decl);
-      else
-	warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl);
-      /* This symbol is effectively an "extern" declaration now.  */
-      TREE_PUBLIC (decl) = 1;
-    }
-
-  /* Warn about static fns or vars defined but not used.  */
-  if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
-       || (((warn_unused_variable && ! TREE_READONLY (decl))
-	    || (warn_unused_const_variable && TREE_READONLY (decl)))
-	   && TREE_CODE (decl) == VAR_DECL))
-      && ! DECL_IN_SYSTEM_HEADER (decl)
-      && ! snode->referred_to_p (/*include_self=*/false)
-      /* This TREE_USED check is needed in addition to referred_to_p
-	 above, because the `__unused__' attribute is not being
-	 considered for referred_to_p.  */
-      && ! TREE_USED (decl)
-      /* The TREE_USED bit for file-scope decls is kept in the identifier,
-	 to handle multiple external decls in different scopes.  */
-      && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
-      && ! DECL_EXTERNAL (decl)
-      && ! DECL_ARTIFICIAL (decl)
-      && ! DECL_ABSTRACT_ORIGIN (decl)
-      && ! TREE_PUBLIC (decl)
-      /* A volatile variable might be used in some non-obvious way.  */
-      && ! TREE_THIS_VOLATILE (decl)
-      /* Global register variables must be declared to reserve them.  */
-      && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
-      /* Global ctors and dtors are called by the runtime.  */
-      && (TREE_CODE (decl) != FUNCTION_DECL
-	  || (!DECL_STATIC_CONSTRUCTOR (decl)
-	      && !DECL_STATIC_DESTRUCTOR (decl)))
-      /* Otherwise, ask the language.  */
-      && lang_hooks.decls.warn_unused_global (decl))
-    warning_at (DECL_SOURCE_LOCATION (decl),
-		(TREE_CODE (decl) == FUNCTION_DECL)
-		? OPT_Wunused_function
-		: (TREE_READONLY (decl)
-		   ? OPT_Wunused_const_variable
-		   : OPT_Wunused_variable),
-		"%qD defined but not used", decl);
-}
-
 /* Compile an entire translation unit.  Write a file of assembly
    output and various debugging dumps.  */