Fix removal of ifunc (PR ipa/81214).

2017-06-30  Martin Liska  <mliska@suse.cz>

	PR ipa/81214
	* gcc.target/i386/pr81214.c: New test.
2017-06-30  Martin Liska  <mliska@suse.cz>

	PR ipa/81214
	* multiple_target.c (create_dispatcher_calls): Make ifunc
	also for function that don't have calls or are not referenced.

From-SVN: r249840

gcc/ChangeLog

+2017-06-30  Martin Liska  <mliska@suse.cz>
+
+	PR ipa/81214
+	* multiple_target.c (create_dispatcher_calls): Make ifunc
+	also for function that don't have calls or are not referenced.
+
 2017-06-30  Richard Biener  <rguenther@suse.de>
 
 	* tree-vect-slp.c (vect_slp_analyze_node_operations): Only

gcc/multiple_target.c

@@ -68,18 +68,6 @@ create_dispatcher_calls (struct cgraph_node *node)
       || !is_function_default_version (node->decl))
     return;
 
-  auto_vec<cgraph_edge *> edges_to_redirect;
-  auto_vec<ipa_ref *> references_to_redirect;
-
-  for (unsigned i = 0; node->iterate_referring (i, ref); i++)
-    references_to_redirect.safe_push (ref);
-
-  /* We need to remember NEXT_CALLER as it could be modified in the loop.  */
-  for (cgraph_edge *e = node->callers; e ; e = e->next_caller)
-    edges_to_redirect.safe_push (e);
-
-  if (!edges_to_redirect.is_empty () || !references_to_redirect.is_empty ())
-    {
   if (!targetm.has_ifunc_p ())
     {
       error_at (DECL_SOURCE_LOCATION (node->decl),
@@ -112,6 +100,18 @@ create_dispatcher_calls (struct cgraph_node *node)
   if (!inode->analyzed)
     inode->resolve_alias (cgraph_node::get (resolver_decl));
 
+  auto_vec<cgraph_edge *> edges_to_redirect;
+  auto_vec<ipa_ref *> references_to_redirect;
+
+  for (unsigned i = 0; node->iterate_referring (i, ref); i++)
+    references_to_redirect.safe_push (ref);
+
+  /* We need to remember NEXT_CALLER as it could be modified in the loop.  */
+  for (cgraph_edge *e = node->callers; e ; e = e->next_caller)
+    edges_to_redirect.safe_push (e);
+
+  if (!edges_to_redirect.is_empty () || !references_to_redirect.is_empty ())
+    {
       /* Redirect edges.  */
       unsigned i;
       cgraph_edge *e;

gcc/testsuite/ChangeLog

+2017-06-30  Martin Liska  <mliska@suse.cz>
+
+	PR ipa/81214
+	* gcc.target/i386/pr81214.c: New test.
+
 2017-06-30  Nathan Sidwell  <nathan@acm.org>
 
 	* g++.dg/plugin/decl-plugin-test.C: Expect special ctor name.

gcc/testsuite/gcc.target/i386/pr81214.c

+/* PR ipa/81214.  */
+/* { dg-do compile } */
+/* { dg-require-ifunc "" } */
+
+__attribute__((target_clones("avx","arch=slm","arch=core-avx2","default")))
+int
+foo ()
+{
+  return -2;
+}
+
+/* { dg-final { scan-assembler "\t.globl\tfoo" } } */
+/* { dg-final { scan-assembler "foo.resolver:" } } */
+/* { dg-final { scan-assembler "foo, @gnu_indirect_function" } } */