Do not allow to inline ifunc resolvers (PR ipa/81128).

2017-06-28  Martin Liska  <mliska@suse.cz>

	PR ipa/81128
	* ipa-visibility.c (non_local_p): Handle visibility.
2017-06-28  Martin Liska  <mliska@suse.cz>

	PR ipa/81128
	* c-attribs.c (handle_alias_ifunc_attribute): Append ifunc alias
	to a function declaration.
2017-06-28  Martin Liska  <mliska@suse.cz>

	PR ipa/81128
	* gcc.target/i386/pr81128.c: New test.

From-SVN: r249735

gcc/ChangeLog

 2017-06-28  Martin Liska  <mliska@suse.cz>
 
+	PR ipa/81128
+	* ipa-visibility.c (non_local_p): Handle visibility.
+
+2017-06-28  Martin Liska  <mliska@suse.cz>
+
 	PR driver/79659
 	* common.opt: Add IntegerRange to various options.
 	* opt-functions.awk (integer_range_info): New function.

gcc/c-family/ChangeLog

 2017-06-28  Martin Liska  <mliska@suse.cz>
 
+	PR ipa/81128
+	* c-attribs.c (handle_alias_ifunc_attribute): Append ifunc alias
+	to a function declaration.
+
+2017-06-28  Martin Liska  <mliska@suse.cz>
+
 	PR driver/79659
 	* c.opt: Add IntegerRange to various options.
 

gcc/c-family/c-attribs.c

@@ -1846,9 +1846,14 @@ handle_alias_ifunc_attribute (bool is_alias, tree *node, tree name, tree args,
 	TREE_STATIC (decl) = 1;
 
       if (!is_alias)
-	/* ifuncs are also aliases, so set that attribute too.  */
-	DECL_ATTRIBUTES (decl)
-	  = tree_cons (get_identifier ("alias"), args, DECL_ATTRIBUTES (decl));
+	{
+	  /* ifuncs are also aliases, so set that attribute too.  */
+	  DECL_ATTRIBUTES (decl)
+	    = tree_cons (get_identifier ("alias"), args,
+			 DECL_ATTRIBUTES (decl));
+	  DECL_ATTRIBUTES (decl) = tree_cons (get_identifier ("ifunc"),
+					      NULL, DECL_ATTRIBUTES (decl));
+	}
     }
   else
     {

gcc/ipa-visibility.c

@@ -97,7 +97,8 @@ non_local_p (struct cgraph_node *node, void *data ATTRIBUTE_UNUSED)
 	   && !DECL_EXTERNAL (node->decl)
 	   && !node->externally_visible
 	   && !node->used_from_other_partition
-	   && !node->in_other_partition);
+	   && !node->in_other_partition
+	   && node->get_availability () >= AVAIL_AVAILABLE);
 }
 
 /* Return true when function can be marked local.  */

gcc/testsuite/ChangeLog

 2017-06-28  Martin Liska  <mliska@suse.cz>
 
+	PR ipa/81128
+	* gcc.target/i386/pr81128.c: New test.
+
+2017-06-28  Martin Liska  <mliska@suse.cz>
+
 	PR driver/79659
 	* g++.dg/opt/pr79659.C: New test.
 

gcc/testsuite/gcc.target/i386/pr81128.c

+/* PR ipa/81128 */
+/* { dg-do run } */
+/* { dg-options "-O3" } */
+/* { dg-require-ifunc "" } */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+int resolver_fn = 0;
+int resolved_fn = 0;
+
+static inline void
+do_it_right_at_runtime_A ()
+{
+  resolved_fn++;
+}
+
+static inline void
+do_it_right_at_runtime_B ()
+{
+  resolved_fn++;
+}
+
+static inline void do_it_right_at_runtime (void);
+
+void do_it_right_at_runtime (void)
+  __attribute__ ((ifunc ("resolve_do_it_right_at_runtime")));
+
+static void (*resolve_do_it_right_at_runtime (void)) (void)
+{
+  srand (time (NULL));
+  int r = rand ();
+  resolver_fn++;
+
+  /* Use intermediate variable to get a warning for non-matching
+   * prototype. */
+  typeof(do_it_right_at_runtime) *func;
+  if (r & 1)
+    func = do_it_right_at_runtime_A;
+  else
+    func = do_it_right_at_runtime_B;
+
+  return (void *) func;
+}
+
+int
+main (void)
+{
+  const unsigned int ITERS = 10;
+
+  for (int i = ITERS; i > 0; i--)
+    {
+      do_it_right_at_runtime ();
+    }
+
+  if (resolver_fn != 1)
+    __builtin_abort ();
+
+  if (resolved_fn != 10)
+    __builtin_abort ();
+
+  return 0;
+}