[multiple changes]

2009-06-16  Olatunji Ruwase  <tjruwase@google.com>

	* plugin.c(position_pass): Skip newly inserted pass during list
	traversal to avoid repeated insertion.

2009-06-05  Olatunji Ruwase  <tjruwase@google.com>

	* gcc.dg/plugin/one_time_plugin.c: New test.
	* gcc.dg/plugin/one_time-test-1.c: New test.
	* gcc.dg/plugin/plugin.exp: Added one_time_plugin.c test.

From-SVN: r148566

gcc/ChangeLog

+2009-06-16  Olatunji Ruwase  <tjruwase@google.com>
+
+	* plugin.c(position_pass): Skip newly inserted pass during list
+	traversal to avoid repeated insertion.
+
 2009-06-16  Ian Lance Taylor  <iant@google.com>
 
 	* vec.h (VEC_stack_alloc): Define different version if

gcc/plugin.c

@@ -336,6 +336,11 @@ position_pass (struct plugin_pass *plugin_pass_info,
               case PASS_POS_INSERT_AFTER:
                 new_pass->next = pass->next;
                 pass->next = new_pass;
+
+		/* Skip newly inserted pass to avoid repeated
+		   insertions in the case where the new pass and the
+		   existing one have the same name.  */
+                pass = new_pass; 
                 break;
               case PASS_POS_INSERT_BEFORE:
                 new_pass->next = pass;

gcc/testsuite/ChangeLog

+2009-06-05  Olatunji Ruwase  <tjruwase@google.com>
+
+	* gcc.dg/plugin/one_time_plugin.c: New test.
+	* gcc.dg/plugin/one_time-test-1.c: New test.
+	* gcc.dg/plugin/plugin.exp: Added one_time_plugin.c test.
+
 2009-06-16  Ian Lance Taylor  <iant@google.com>
 
 	* g++.dg/warn/skip-1.C: New testcase.

gcc/testsuite/gcc.dg/plugin/one_time-test-1.c

+/* Test that pass is inserted and invoked once. */
+/* { dg-do compile } */
+/* { dg-options "-O" } */
+
+int main (int argc, char **argv) 
+{ 
+  return 0;  
+}

gcc/testsuite/gcc.dg/plugin/one_time_plugin.c

+/* Plugin that prints message if it inserted (and invoked) more than once. */
+#include "config.h"
+#include "gcc-plugin.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "toplev.h"
+#include "gimple.h"
+#include "tree-pass.h"
+#include "intl.h"
+
+static bool one_pass_gate (void)
+{
+  return true;
+}
+
+static unsigned int one_pass_exec (void)
+{
+  static int counter = 0;
+
+  if (counter > 0) {
+    printf ("Executed more than once \n");
+ }
+ counter++;
+}
+
+struct gimple_opt_pass one_pass = 
+{
+  {
+  GIMPLE_PASS,
+  "useless",                           /* name */
+  one_pass_gate,                         /* gate */
+  one_pass_exec,       /* execute */
+  NULL,                                 /* sub */
+  NULL,                                 /* next */
+  0,                                    /* static_pass_number */
+  0,                                    /* tv_id */
+  PROP_gimple_any,                      /* properties_required */
+  0,                                    /* properties_provided */
+  0,                                    /* properties_destroyed */
+  0,                                    /* todo_flags_start */
+  TODO_dump_func                        /* todo_flags_finish */
+  }
+};
+
+
+int plugin_init (struct plugin_name_args *plugin_info,
+                 struct plugin_gcc_version *version)
+{
+  struct plugin_pass p;
+
+  p.pass = &one_pass.pass;
+  p.reference_pass_name = "useless";
+  p.ref_pass_instance_number = 1;
+  p.pos_op = PASS_POS_INSERT_AFTER;
+
+  register_callback ("one_pass", PLUGIN_PASS_MANAGER_SETUP, NULL, &p);
+
+  return 0;
+}

gcc/testsuite/gcc.dg/plugin/plugin.exp

@@ -49,6 +49,7 @@ load_lib plugin-support.exp
 set plugin_test_list [list \
     { selfassign.c self-assign-test-1.c self-assign-test-2.c } \
     { ggcplug.c ggcplug-test-1.c } \
+    { one_time_plugin.c one_time-test-1.c } \
 ]
 
 foreach plugin_test $plugin_test_list {