1  /* Plugin that prints message if it inserted (and invoked) more than once. */
       2  #include "config.h"
       3  #include "gcc-plugin.h"
       4  #include "system.h"
       5  #include "coretypes.h"
       6  #include "tree.h"
       7  #include "tm.h"
       8  #include "toplev.h"
       9  #include "hash-table.h"
      10  #include "vec.h"
      11  #include "ggc.h"
      12  #include "basic-block.h"
      13  #include "tree-ssa-alias.h"
      14  #include "internal-fn.h"
      15  #include "tree-eh.h"
      16  #include "gimple-expr.h"
      17  #include "is-a.h"
      18  #include "gimple.h"
      19  #include "tree-pass.h"
      20  #include "intl.h"
      21  #include "context.h"
      22  
      23  int plugin_is_GPL_compatible;
      24  
      25  namespace {
      26  
      27  const pass_data pass_data_one_pass =
      28  {
      29    GIMPLE_PASS, /* type */
      30    "cfg", /* name */
      31    OPTGROUP_NONE, /* optinfo_flags */
      32    TV_NONE, /* tv_id */
      33    PROP_gimple_any, /* properties_required */
      34    0, /* properties_provided */
      35    0, /* properties_destroyed */
      36    0, /* todo_flags_start */
      37    0, /* todo_flags_finish */
      38  };
      39  
      40  class one_pass : public gimple_opt_pass
      41  {
      42  public:
      43    one_pass(gcc::context *ctxt)
      44      : gimple_opt_pass(pass_data_one_pass, ctxt),
      45        counter(0)
      46    {}
      47  
      48    /* opt_pass methods: */
      49    virtual bool gate (function *);
      50    virtual unsigned int execute (function *);
      51  
      52  private:
      53    int counter;
      54  }; // class one_pass
      55  
      56  } // anon namespace
      57  
      58  bool one_pass::gate (function *)
      59  {
      60    return true;
      61  }
      62  
      63  unsigned int
      64  one_pass::execute (function *)
      65  {
      66    if (counter > 0) {
      67      printf ("Executed more than once \n");
      68   }
      69   counter++;
      70   return 0;
      71  }
      72  
      73  gimple_opt_pass *
      74  make_one_pass (gcc::context *ctxt)
      75  {
      76    return new one_pass (ctxt);
      77  }
      78  
      79  
      80  int plugin_init (struct plugin_name_args *plugin_info,
      81                   struct plugin_gcc_version *version)
      82  {
      83    struct register_pass_info p;
      84  
      85    p.pass = make_one_pass (g);
      86    p.reference_pass_name = "cfg";
      87    p.ref_pass_instance_number = 1;
      88    p.pos_op = PASS_POS_INSERT_AFTER;
      89  
      90    register_callback ("one_pass", PLUGIN_PASS_MANAGER_SETUP, NULL, &p);
      91  
      92    return 0;
      93  }