This avoids all the complex work on simple things like
clear_last_verified.  It also makes eventually inlining all
calls (for example the one with the small IPA pass hack)
less code-duplicating.

I had to remove the asserts in favor of frees of DOM info in 
release_function_body as the old code released DOM info in
various odd places.

Bootstrapped on x86_64-unknown-linux-gnu, testing in progress.

Honza, does this look ok to you?

Thanks,
Richard.

2014-04-23  Richard Biener  <rguent...@suse.de>

        * tree-pass.h (execute_pass_list): Adjust prototype.
        * passes.c (pass_manager::execute_early_local_passes):
        Adjust.
        (do_per_function): Change callback signature, push all actual
        work to the callbals.
        (do_per_function_toporder): Likewise.
        (execute_function_dump): Adjust.
        (execute_function_todo): Likewise.
        (clear_last_verified): Likewise.
        (verify_curr_properties): Likewise.
        (update_properties_after_pass): Likewise.
        (apply_ipa_transforms): Likewise.
        (execute_pass_list_1): Split out from ...
        (execute_pass_list): ... here.  Adjust.
        (execute_ipa_pass_list): Likewise.
        * cgraphunit.c (cgraph_add_new_function): Adjust.
        (analyze_function): Likewise.
        (expand_function): Likewise.
        * cgraph.c (release_function_body): Free dominance info
        here instead of asserting it was magically freed elsewhere.

Index: gcc/tree-pass.h
===================================================================
*** gcc/tree-pass.h.orig        2014-04-23 14:55:25.640624814 +0200
--- gcc/tree-pass.h     2014-04-23 15:40:56.443436802 +0200
*************** extern gimple_opt_pass *make_pass_conver
*** 587,593 ****
  extern opt_pass *current_pass;
  
  extern bool execute_one_pass (opt_pass *);
! extern void execute_pass_list (opt_pass *);
  extern void execute_ipa_pass_list (opt_pass *);
  extern void execute_ipa_summary_passes (ipa_opt_pass_d *);
  extern void execute_all_ipa_transforms (void);
--- 587,593 ----
  extern opt_pass *current_pass;
  
  extern bool execute_one_pass (opt_pass *);
! extern void execute_pass_list (function *, opt_pass *);
  extern void execute_ipa_pass_list (opt_pass *);
  extern void execute_ipa_summary_passes (ipa_opt_pass_d *);
  extern void execute_all_ipa_transforms (void);
*************** extern bool function_called_by_processed
*** 615,621 ****
  extern bool first_pass_instance;
  
  /* Declare for plugins.  */
! extern void do_per_function_toporder (void (*) (void *), void *);
  
  extern void disable_pass (const char *);
  extern void enable_pass (const char *);
--- 615,621 ----
  extern bool first_pass_instance;
  
  /* Declare for plugins.  */
! extern void do_per_function_toporder (void (*) (function *, void *), void *);
  
  extern void disable_pass (const char *);
  extern void enable_pass (const char *);
Index: gcc/passes.c
===================================================================
*** gcc/passes.c.orig   2014-04-23 14:55:25.642624814 +0200
--- gcc/passes.c        2014-04-23 15:41:02.414436391 +0200
*************** opt_pass::opt_pass (const pass_data &dat
*** 132,138 ****
  void
  pass_manager::execute_early_local_passes ()
  {
!   execute_pass_list (pass_early_local_passes_1->sub);
  }
  
  unsigned int
--- 132,138 ----
  void
  pass_manager::execute_early_local_passes ()
  {
!   execute_pass_list (cfun, pass_early_local_passes_1->sub);
  }
  
  unsigned int
*************** pass_manager::pass_manager (context *ctx
*** 1498,1524 ****
     call CALLBACK on the current function.  */
  
  static void
! do_per_function (void (*callback) (void *data), void *data)
  {
    if (current_function_decl)
!     callback (data);
    else
      {
        struct cgraph_node *node;
        FOR_EACH_DEFINED_FUNCTION (node)
        if (node->analyzed && gimple_has_body_p (node->decl)
            && (!node->clone_of || node->decl != node->clone_of->decl))
!         {
!           push_cfun (DECL_STRUCT_FUNCTION (node->decl));
!           callback (data);
!           if (!flag_wpa)
!             {
!               free_dominance_info (CDI_DOMINATORS);
!               free_dominance_info (CDI_POST_DOMINATORS);
!             }
!           pop_cfun ();
!           ggc_collect ();
!         }
      }
  }
  
--- 1498,1514 ----
     call CALLBACK on the current function.  */
  
  static void
! do_per_function (void (*callback) (function *, void *data), void *data)
  {
    if (current_function_decl)
!     callback (cfun, data);
    else
      {
        struct cgraph_node *node;
        FOR_EACH_DEFINED_FUNCTION (node)
        if (node->analyzed && gimple_has_body_p (node->decl)
            && (!node->clone_of || node->decl != node->clone_of->decl))
!         callback (DECL_STRUCT_FUNCTION (node->decl), data);
      }
  }
  
*************** static GTY ((length ("nnodes"))) cgraph_
*** 1533,1544 ****
     call CALLBACK on the current function.
     This function is global so that plugins can use it.  */
  void
! do_per_function_toporder (void (*callback) (void *data), void *data)
  {
    int i;
  
    if (current_function_decl)
!     callback (data);
    else
      {
        gcc_assert (!order);
--- 1523,1534 ----
     call CALLBACK on the current function.
     This function is global so that plugins can use it.  */
  void
! do_per_function_toporder (void (*callback) (function *, void *data), void 
*data)
  {
    int i;
  
    if (current_function_decl)
!     callback (cfun, data);
    else
      {
        gcc_assert (!order);
*************** do_per_function_toporder (void (*callbac
*** 1554,1568 ****
          order[i] = NULL;
          node->process = 0;
          if (cgraph_function_with_gimple_body_p (node))
!           {
!             cgraph_get_body (node);
!             push_cfun (DECL_STRUCT_FUNCTION (node->decl));
!             callback (data);
!             free_dominance_info (CDI_DOMINATORS);
!             free_dominance_info (CDI_POST_DOMINATORS);
!             pop_cfun ();
!             ggc_collect ();
!           }
        }
      }
    ggc_free (order);
--- 1544,1550 ----
          order[i] = NULL;
          node->process = 0;
          if (cgraph_function_with_gimple_body_p (node))
!           callback (DECL_STRUCT_FUNCTION (node->decl), data);
        }
      }
    ggc_free (order);
*************** do_per_function_toporder (void (*callbac
*** 1573,1586 ****
  /* Helper function to perform function body dump.  */
  
  static void
! execute_function_dump (void *data)
  {
    opt_pass *pass = (opt_pass *)data;
  
!   if (dump_file && current_function_decl)
      {
!       if (cfun->curr_properties & PROP_trees)
!         dump_function_to_file (current_function_decl, dump_file, dump_flags);
        else
        print_rtl_with_bb (dump_file, get_insns (), dump_flags);
  
--- 1555,1570 ----
  /* Helper function to perform function body dump.  */
  
  static void
! execute_function_dump (function *fn, void *data)
  {
    opt_pass *pass = (opt_pass *)data;
  
!   if (dump_file)
      {
!       push_cfun (fn);
! 
!       if (fn->curr_properties & PROP_trees)
!         dump_function_to_file (fn->decl, dump_file, dump_flags);
        else
        print_rtl_with_bb (dump_file, get_insns (), dump_flags);
  
*************** execute_function_dump (void *data)
*** 1588,1594 ****
         close the file before aborting.  */
        fflush (dump_file);
  
!       if ((cfun->curr_properties & PROP_cfg)
          && (dump_flags & TDF_GRAPH))
        {
          if (!pass->graph_dump_initialized)
--- 1572,1578 ----
         close the file before aborting.  */
        fflush (dump_file);
  
!       if ((fn->curr_properties & PROP_cfg)
          && (dump_flags & TDF_GRAPH))
        {
          if (!pass->graph_dump_initialized)
*************** execute_function_dump (void *data)
*** 1596,1603 ****
              clean_graph_dump_file (dump_file_name);
              pass->graph_dump_initialized = true;
            }
!         print_graph_cfg (dump_file_name, cfun);
        }
      }
  }
  
--- 1580,1589 ----
              clean_graph_dump_file (dump_file_name);
              pass->graph_dump_initialized = true;
            }
!         print_graph_cfg (dump_file_name, fn);
        }
+ 
+       pop_cfun ();
      }
  }
  
*************** pass_manager::dump_profile_report () con
*** 1728,1740 ****
  /* Perform all TODO actions that ought to be done on each function.  */
  
  static void
! execute_function_todo (void *data)
  {
    unsigned int flags = (size_t)data;
!   flags &= ~cfun->last_verified;
    if (!flags)
      return;
  
    /* Always cleanup the CFG before trying to update SSA.  */
    if (flags & TODO_cleanup_cfg)
      {
--- 1714,1728 ----
  /* Perform all TODO actions that ought to be done on each function.  */
  
  static void
! execute_function_todo (function *fn, void *data)
  {
    unsigned int flags = (size_t)data;
!   flags &= ~fn->last_verified;
    if (!flags)
      return;
  
+   push_cfun (fn);
+ 
    /* Always cleanup the CFG before trying to update SSA.  */
    if (flags & TODO_cleanup_cfg)
      {
*************** execute_function_todo (void *data)
*** 1774,1780 ****
  
    /* If we've seen errors do not bother running any verifiers.  */
    if (seen_error ())
!     return;
  
  #if defined ENABLE_CHECKING
    if (flags & TODO_verify_ssa
--- 1762,1771 ----
  
    /* If we've seen errors do not bother running any verifiers.  */
    if (seen_error ())
!     {
!       pop_cfun ();
!       return;
!     }
  
  #if defined ENABLE_CHECKING
    if (flags & TODO_verify_ssa
*************** execute_function_todo (void *data)
*** 1793,1799 ****
      verify_rtl_sharing ();
  #endif
  
!   cfun->last_verified = flags & TODO_verify_all;
  }
  
  /* Perform all TODO actions.  */
--- 1784,1792 ----
      verify_rtl_sharing ();
  #endif
  
!   fn->last_verified = flags & TODO_verify_all;
! 
!   pop_cfun ();
  }
  
  /* Perform all TODO actions.  */
*************** verify_interpass_invariants (void)
*** 1855,1863 ****
  /* Clear the last verified flag.  */
  
  static void
! clear_last_verified (void *data ATTRIBUTE_UNUSED)
  {
!   cfun->last_verified = 0;
  }
  
  /* Helper function. Verify that the properties has been turn into the
--- 1848,1856 ----
  /* Clear the last verified flag.  */
  
  static void
! clear_last_verified (function *fn, void *data ATTRIBUTE_UNUSED)
  {
!   fn->last_verified = 0;
  }
  
  /* Helper function. Verify that the properties has been turn into the
*************** clear_last_verified (void *data ATTRIBUT
*** 1865,1874 ****
  
  #ifdef ENABLE_CHECKING
  static void
! verify_curr_properties (void *data)
  {
    unsigned int props = (size_t)data;
!   gcc_assert ((cfun->curr_properties & props) == props);
  }
  #endif
  
--- 1858,1867 ----
  
  #ifdef ENABLE_CHECKING
  static void
! verify_curr_properties (function *fn, void *data)
  {
    unsigned int props = (size_t)data;
!   gcc_assert ((fn->curr_properties & props) == props);
  }
  #endif
  
*************** pass_fini_dump_file (opt_pass *pass)
*** 1927,1937 ****
     properties. */
  
  static void
! update_properties_after_pass (void *data)
  {
    opt_pass *pass = (opt_pass *) data;
!   cfun->curr_properties = (cfun->curr_properties | pass->properties_provided)
!                          & ~pass->properties_destroyed;
  }
  
  /* Execute summary generation for all of the passes in IPA_PASS.  */
--- 1920,1930 ----
     properties. */
  
  static void
! update_properties_after_pass (function *fn, void *data)
  {
    opt_pass *pass = (opt_pass *) data;
!   fn->curr_properties = (fn->curr_properties | pass->properties_provided)
!                        & ~pass->properties_destroyed;
  }
  
  /* Execute summary generation for all of the passes in IPA_PASS.  */
*************** execute_all_ipa_transforms (void)
*** 2042,2055 ****
  /* Callback for do_per_function to apply all IPA transforms.  */
  
  static void
! apply_ipa_transforms (void *data)
  {
!   struct cgraph_node *node = cgraph_get_node (current_function_decl);
    if (!node->global.inlined_to && node->ipa_transforms_to_apply.exists ())
      {
        *(bool *)data = true;
        execute_all_ipa_transforms ();
        rebuild_cgraph_edges ();
      }
  }
  
--- 2035,2053 ----
  /* Callback for do_per_function to apply all IPA transforms.  */
  
  static void
! apply_ipa_transforms (function *fn, void *data)
  {
!   struct cgraph_node *node = cgraph_get_node (fn->decl);
    if (!node->global.inlined_to && node->ipa_transforms_to_apply.exists ())
      {
+       push_cfun (fn);
        *(bool *)data = true;
        execute_all_ipa_transforms ();
        rebuild_cgraph_edges ();
+       free_dominance_info (CDI_DOMINATORS);
+       free_dominance_info (CDI_POST_DOMINATORS);
+       pop_cfun ();
+       ggc_collect ();
      }
  }
  
*************** execute_one_pass (opt_pass *pass)
*** 2202,2221 ****
    return true;
  }
  
! void
! execute_pass_list (opt_pass *pass)
  {
    do
      {
        gcc_assert (pass->type == GIMPLE_PASS
                  || pass->type == RTL_PASS);
        if (execute_one_pass (pass) && pass->sub)
!         execute_pass_list (pass->sub);
        pass = pass->next;
      }
    while (pass);
  }
  
  /* Write out all LTO data.  */
  static void
  write_lto (void)
--- 2200,2232 ----
    return true;
  }
  
! static void
! execute_pass_list_1 (opt_pass *pass)
  {
    do
      {
        gcc_assert (pass->type == GIMPLE_PASS
                  || pass->type == RTL_PASS);
        if (execute_one_pass (pass) && pass->sub)
!         execute_pass_list_1 (pass->sub);
        pass = pass->next;
      }
    while (pass);
  }
  
+ void
+ execute_pass_list (function *fn, opt_pass *pass)
+ {
+   push_cfun (fn);
+   execute_pass_list_1 (pass);
+   if (fn->cfg)
+     {
+       free_dominance_info (CDI_DOMINATORS);
+       free_dominance_info (CDI_POST_DOMINATORS);
+     }
+   pop_cfun ();
+ }
+ 
  /* Write out all LTO data.  */
  static void
  write_lto (void)
*************** execute_ipa_pass_list (opt_pass *pass)
*** 2539,2545 ****
          if (pass->sub->type == GIMPLE_PASS)
            {
              invoke_plugin_callbacks (PLUGIN_EARLY_GIMPLE_PASSES_START, NULL);
!             do_per_function_toporder ((void (*)(void *))execute_pass_list,
                                        pass->sub);
              invoke_plugin_callbacks (PLUGIN_EARLY_GIMPLE_PASSES_END, NULL);
            }
--- 2550,2557 ----
          if (pass->sub->type == GIMPLE_PASS)
            {
              invoke_plugin_callbacks (PLUGIN_EARLY_GIMPLE_PASSES_START, NULL);
!             do_per_function_toporder ((void (*)(function *, void *))
!                                         execute_pass_list,
                                        pass->sub);
              invoke_plugin_callbacks (PLUGIN_EARLY_GIMPLE_PASSES_END, NULL);
            }
Index: gcc/cgraphunit.c
===================================================================
*** gcc/cgraphunit.c.orig       2014-04-23 14:56:40.528619658 +0200
--- gcc/cgraphunit.c    2014-04-23 15:00:28.173603985 +0200
*************** cgraph_add_new_function (tree fndecl, bo
*** 520,526 ****
            push_cfun (DECL_STRUCT_FUNCTION (fndecl));
            gimple_register_cfg_hooks ();
            bitmap_obstack_initialize (NULL);
!           execute_pass_list (passes->all_lowering_passes);
            passes->execute_early_local_passes ();
            bitmap_obstack_release (NULL);
            pop_cfun ();
--- 520,526 ----
            push_cfun (DECL_STRUCT_FUNCTION (fndecl));
            gimple_register_cfg_hooks ();
            bitmap_obstack_initialize (NULL);
!           execute_pass_list (cfun, passes->all_lowering_passes);
            passes->execute_early_local_passes ();
            bitmap_obstack_release (NULL);
            pop_cfun ();
*************** analyze_function (struct cgraph_node *no
*** 658,664 ****
  
          gimple_register_cfg_hooks ();
          bitmap_obstack_initialize (NULL);
!         execute_pass_list (g->get_passes ()->all_lowering_passes);
          free_dominance_info (CDI_POST_DOMINATORS);
          free_dominance_info (CDI_DOMINATORS);
          compact_blocks ();
--- 658,664 ----
  
          gimple_register_cfg_hooks ();
          bitmap_obstack_initialize (NULL);
!         execute_pass_list (cfun, g->get_passes ()->all_lowering_passes);
          free_dominance_info (CDI_POST_DOMINATORS);
          free_dominance_info (CDI_DOMINATORS);
          compact_blocks ();
*************** expand_function (struct cgraph_node *nod
*** 1771,1777 ****
    /* Signal the start of passes.  */
    invoke_plugin_callbacks (PLUGIN_ALL_PASSES_START, NULL);
  
!   execute_pass_list (g->get_passes ()->all_passes);
  
    /* Signal the end of passes.  */
    invoke_plugin_callbacks (PLUGIN_ALL_PASSES_END, NULL);
--- 1771,1777 ----
    /* Signal the start of passes.  */
    invoke_plugin_callbacks (PLUGIN_ALL_PASSES_START, NULL);
  
!   execute_pass_list (cfun, g->get_passes ()->all_passes);
  
    /* Signal the end of passes.  */
    invoke_plugin_callbacks (PLUGIN_ALL_PASSES_END, NULL);
Index: gcc/cgraph.c
===================================================================
*** gcc/cgraph.c.orig   2014-04-23 15:10:15.332563560 +0200
--- gcc/cgraph.c        2014-04-23 15:10:22.548563063 +0200
*************** release_function_body (tree decl)
*** 1696,1703 ****
        }
        if (cfun->cfg)
        {
!         gcc_assert (dom_computed[0] == DOM_NONE);
!         gcc_assert (dom_computed[1] == DOM_NONE);
          clear_edges ();
          cfun->cfg = NULL;
        }
--- 1696,1703 ----
        }
        if (cfun->cfg)
        {
!         free_dominance_info (CDI_DOMINATORS);
!         free_dominance_info (CDI_POST_DOMINATORS);
          clear_edges ();
          cfun->cfg = NULL;
        }

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