cgraphunit.c (handle_alias_pairs): Reset the alias flag after the error message…

cgraphunit.c (handle_alias_pairs): Reset the alias flag after the error message is issued for an alias to...

	* cgraphunit.c (handle_alias_pairs): Reset the alias flag after the
	error message is issued for an alias to undefined symbol.

From-SVN: r201826

gcc/ChangeLog

+2013-08-18  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* cgraphunit.c (handle_alias_pairs): Reset the alias flag after the
+	error message is issued for an alias to undefined symbol.
+
 2013-08-18  Jan Hubicka  <jh@suse.cz>
 
 	* cgraph.c (cgraph_create_indirect_edge): Discover

gcc/cgraphunit.c

@@ -1004,7 +1004,7 @@ analyze_functions (void)
 
 /* Translate the ugly representation of aliases as alias pairs into nice
    representation in callgraph.  We don't handle all cases yet,
-   unforutnately.  */
+   unfortunately.  */
 
 static void
 handle_alias_pairs (void)
@@ -1016,10 +1016,11 @@ handle_alias_pairs (void)
     {
       symtab_node target_node = symtab_node_for_asm (p->target);
 
-      /* Weakrefs with target not defined in current unit are easy to handle; they
-	 behave just as external variables except we need to note the alias flag
-	 to later output the weakref pseudo op into asm file.  */
-      if (!target_node && lookup_attribute ("weakref", DECL_ATTRIBUTES (p->decl)) != NULL)
+      /* Weakrefs with target not defined in current unit are easy to handle:
+	 they behave just as external variables except we need to note the
+	 alias flag to later output the weakref pseudo op into asm file.  */
+      if (!target_node
+	  && lookup_attribute ("weakref", DECL_ATTRIBUTES (p->decl)) != NULL)
 	{
 	  symtab_node node = symtab_get_node (p->decl);
 	  if (node)
@@ -1034,6 +1035,9 @@ handle_alias_pairs (void)
       else if (!target_node)
 	{
 	  error ("%q+D aliased to undefined symbol %qE", p->decl, p->target);
+	  symtab_node node = symtab_get_node (p->decl);
+	  if (node)
+	    node->symbol.alias = false;
 	  alias_pairs->unordered_remove (i);
 	  continue;
 	}

gcc/testsuite/ChangeLog

+2013-08-18  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gnat.dg/specs/linker_alias.ads: New test.
+
 2013-08-16  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/58164

gcc/testsuite/gnat.dg/specs/linker_alias.ads

+-- { dg-do compile }
+
+package Linker_Alias is
+
+   Var : Integer;  -- { dg-error "aliased to undefined symbol" }
+   pragma Export (C, Var, "my_var");
+   pragma Linker_Alias (Var, "var2");
+
+end Linker_Alias;