ipa-split.c (execute_split_functions): Split externally visible functions called once.

	* ipa-split.c (execute_split_functions): Split externally visible
	functions called once.
	* gcc.dg/tree-ssa/fnsplit-1.c: New testcase.

From-SVN: r202185

gcc/ChangeLog

+2013-09-02  Jan Hubicka  <jh@suse.cz>
+
+	* ipa-split.c (execute_split_functions): Split externally visible
+	functions called once.
+
 2013-09-02  Martin Jambor  <mjambor@suse.cz>
 
 	PR ipa/58106

gcc/ipa-split.c

@@ -1537,7 +1537,9 @@ execute_split_functions (void)
      Note that we are not completely conservative about disqualifying functions
      called once.  It is possible that the caller is called more then once and
      then inlining would still benefit.  */
-  if ((!node->callers || !node->callers->next_caller)
+  if ((!node->callers
+       /* Local functions called once will be completely inlined most of time.  */
+       || (!node->callers->next_caller && node->local.local))
       && !node->symbol.address_taken
       && (!flag_lto || !node->symbol.externally_visible))
     {

gcc/testsuite/ChangeLog

+2013-09-02  Jan Hubicka  <jh@suse.cz>
+
+	* gcc.dg/tree-ssa/fnsplit-1.c: New testcase.
+
 2013-09-02  Martin Jambor  <mjambor@suse.cz>
 
 	PR ipa/58106

gcc/testsuite/gcc.dg/tree-ssa/fnsplit-1.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-fnsplit" } */
+#include <stdio.h>
+int a[1000];
+
+void
+t(int a)
+{
+  if (a)
+    printf ("I Am Completely Operational,"),
+    printf ("And All My Circuits Are Functioning Perfectly\n");
+}
+int
+main(void)
+{
+  int i;
+  for (i = 0; i < 1000; i++)
+    t(a[i]);
+  return 0;
+}
+/* { dg-final { scan-tree-dump-times "Splitting function at:" 1 "fnsplit"} } */
+
+/* { dg-final { cleanup-tree-dump "fnsplit" } } */