Introduce beginnings of a pass_manager class.

This patch introduces a gcc::pass_manager class and moves various non-GTY
globals relating to pass management into it.  The gcc::context gains its
first field: a pointer to the gcc::pass_manager instance.

gcc/
	* Makefile.in (PASS_MANAGER_H): New.
	(lto-cgraph.o): Depend on CONTEXT_H and PASS_MANAGER_H.
	(passes.o): Likewise.
	(statistics.o): Likewise.
	(cgraphunit.o): Likewise.
	(context.o): Depend on PASS_MANAGER_H.

	* pass_manager.h: New.

	* cgraphunit.c (cgraph_add_new_function): Update for moves
	of globals to fields of pass_manager.
	(analyze_function): Likewise.
	(expand_function): Likewise.
	(ipa_passes): Likewise.
	(compile): Likewise.

	* context.c (context::context): New.
	* context.h  (context::context): New.
	(context::get_passes): New.
	(context::passes_): New.

	* lto-cgraph.c (input_node): Update for moves of globals to
	fields of pass_manager.

	* passes.c (all_passes): Remove, in favor of a field of the
	same name within the new class pass_manager.
	(all_small_ipa_passes): Likewise.
	(all_lowering_passes): Likewise.
	(all_regular_ipa_passes): Likewise.
	(all_late_ipa_passes): Likewise.
	(all_lto_gen_passes): Likewise.
	(passes_by_id): Likewise.
	(passes_by_id_size): Likewise.
	(gcc_pass_lists): Remove, in favor of "pass_lists" field within
	the new class pass_manager.
	(set_pass_for_id): Convert to...
	(pass_manager::set_pass_for_id): ...method.
	(get_pass_for_id): Convert to...
	(pass_manager::get_pass_for_id): ...method.
	(register_one_dump_file): Move body of implementation into...
	(pass_manager::register_one_dump_file): ...here.
	(register_dump_files_1): Convert to...
	(pass_manager::register_dump_files_1): ...method.
	(register_dump_files): Convert to...
	(pass_manager::register_dump_files): ...method.
	(create_pass_tab): Update for moves of globals to fields of
	pass_manager.
	(dump_passes): Move body of implementation into...
	(pass_manager::dump_passes): ...here.
	(register_pass): Move body of implementation into...
	(pass_manager::register_pass): ...here.
	(init_optimization_passes): Convert into...
	(pass_manager::pass_manager): ...constructor for new
	pass_manager class, and initialize the pass_lists array.
	(check_profile_consistency): Update for moves of globals to
	fields of pass_manager.
	(dump_profile_report): Move body of implementation into...
	(pass_manager::dump_profile_report): ...here.
	(ipa_write_summaries_1): Update for moves of pass lists from
	being globals to fields of pass_manager.
	(ipa_write_optimization_summaries): Likewise.
	(ipa_read_summaries):  Likewise.
	(ipa_read_optimization_summaries): Likewise.
	(execute_all_ipa_stmt_fixups): Likewise.

	* statistics.c (statistics_fini): Update for moves of globals to
	fields of pass_manager.

	* toplev.c (general_init): Replace call to
	init_optimization_passes with construction of the pass_manager
	instance.

	* tree-pass.h (all_passes): Remove, in favor of a field of the
	same name within the new class pass_manager.
	(all_small_ipa_passes): Likewise.
	(all_lowering_passes): Likewise.
	(all_regular_ipa_passes): Likewise.
	(all_lto_gen_passes): Likewise.
	(all_late_ipa_passes): Likewise.
	(passes_by_id): Likewise.
	(passes_by_id_size): Likewise.
	(gcc_pass_lists): Remove, in favor of "pass_lists" field within
	the new class pass_manager.
	(get_pass_for_id): Remove.

gcc/lto/

	* Make-lang.in (lto/lto.o:): Depend on CONTEXT_H and
	PASS_MANAGER_H.

	* lto.c (do_whole_program_analysis): Update for move of
	all_regular_ipa_passes from a global to a field of class
	pass_manager.

From-SVN: r201351

1 files changed, 67 insertions, 32 deletions

diff --git a/gcc/passes.c b/gcc/passes.c
index 94fb586..b8ab1e8 100644
--- a/gcc/passes.c
+++ b/gcc/passes.c
@@ -70,6 +70,10 @@ along with GCC; see the file COPYING3.  If not see
 #include "plugin.h"
 #include "ipa-utils.h"
 #include "tree-pretty-print.h" /* for dump_function_header */
+#include "context.h"
+#include "pass_manager.h"
+
+using namespace gcc;
 
 /* This is used for debugging.  It allows the current pass to printed
    from anywhere in compilation.
@@ -439,23 +443,11 @@ static struct rtl_opt_pass pass_postreload =
 
 
 
-/* The root of the compilation pass tree, once constructed.  */
-struct opt_pass *all_passes, *all_small_ipa_passes, *all_lowering_passes,
-  *all_regular_ipa_passes, *all_late_ipa_passes, *all_lto_gen_passes;
-
-/* This is used by plugins, and should also be used in register_pass.  */
-#define DEF_PASS_LIST(LIST) &LIST,
-struct opt_pass **gcc_pass_lists[] = { GCC_PASS_LISTS NULL };
-#undef DEF_PASS_LIST
-
-/* A map from static pass id to optimization pass.  */
-struct opt_pass **passes_by_id;
-int passes_by_id_size;
-
 /* Set the static pass number of pass PASS to ID and record that
    in the mapping from static pass number to pass.  */
 
-static void
+void
+pass_manager::
 set_pass_for_id (int id, struct opt_pass *pass)
 {
   pass->static_pass_number = id;
@@ -472,7 +464,7 @@ set_pass_for_id (int id, struct opt_pass *pass)
 /* Return the pass with the static pass number ID.  */
 
 struct opt_pass *
-get_pass_for_id (int id)
+pass_manager::get_pass_for_id (int id) const
 {
   if (id >= passes_by_id_size)
     return NULL;
@@ -486,6 +478,12 @@ get_pass_for_id (int id)
 void
 register_one_dump_file (struct opt_pass *pass)
 {
+  g->get_passes ()->register_one_dump_file (pass);
+}
+
+void
+pass_manager::register_one_dump_file (struct opt_pass *pass)
+{
   char *dot_name, *flag_name, *glob_name;
   const char *name, *full_name, *prefix;
   char num[10];
@@ -535,7 +533,8 @@ register_one_dump_file (struct opt_pass *pass)
 
 /* Recursive worker function for register_dump_files.  */
 
-static int
+int
+pass_manager::
 register_dump_files_1 (struct opt_pass *pass, int properties)
 {
   do
@@ -563,11 +562,12 @@ register_dump_files_1 (struct opt_pass *pass, int properties)
   return properties;
 }
 
-/* Register the dump files for the pipeline starting at PASS.
+/* Register the dump files for the pass_manager starting at PASS.
    PROPERTIES reflects the properties that are guaranteed to be available at
    the beginning of the pipeline.  */
 
-static void
+void
+pass_manager::
 register_dump_files (struct opt_pass *pass,int properties)
 {
   pass->properties_required |= properties;
@@ -663,7 +663,7 @@ create_pass_tab (void)
   if (!flag_dump_passes)
     return;
 
-  pass_tab.safe_grow_cleared (passes_by_id_size + 1);
+  pass_tab.safe_grow_cleared (g->get_passes ()->passes_by_id_size + 1);
   name_to_pass_map.traverse <void *, passes_pass_traverse> (NULL);
 }
 
@@ -714,6 +714,12 @@ dump_pass_list (struct opt_pass *pass, int indent)
 void
 dump_passes (void)
 {
+  g->get_passes ()->dump_passes ();
+}
+
+void
+pass_manager::dump_passes () const
+{
   struct cgraph_node *n, *node = NULL;
 
   create_pass_tab();
@@ -1188,6 +1194,13 @@ position_pass (struct register_pass_info *new_pass_info,
 void
 register_pass (struct register_pass_info *pass_info)
 {
+  g->get_passes ()->register_pass (pass_info);
+
+}
+
+void
+pass_manager::register_pass (struct register_pass_info *pass_info)
+{
   bool all_instances, success;
 
   /* The checks below could fail in buggy plugins.  Existing GCC
@@ -1277,11 +1290,21 @@ register_pass (struct register_pass_info *pass_info)
 				        -> all_passes
 */
 
-void
-init_optimization_passes (void)
+pass_manager::pass_manager (context *ctxt)
+: all_passes(NULL), all_small_ipa_passes(NULL), all_lowering_passes(NULL),
+  all_regular_ipa_passes(NULL), all_lto_gen_passes(NULL),
+  all_late_ipa_passes(NULL), passes_by_id(NULL), passes_by_id_size(0),
+  ctxt_(ctxt)
 {
   struct opt_pass **p;
 
+  /* Initialize the pass_lists array.  */
+#define DEF_PASS_LIST(LIST) pass_lists[PASS_LIST_NO_##LIST] = &LIST;
+  GCC_PASS_LISTS
+#undef DEF_PASS_LIST
+
+  /* Build the tree of passes.  */
+
 #define INSERT_PASSES_AFTER(PASS) \
   p = &(PASS);
 
@@ -1432,12 +1455,13 @@ static struct profile_record *profile_record;
 static void
 check_profile_consistency (int index, int subpass, bool run)
 {
+  pass_manager *passes = g->get_passes ();
   if (index == -1)
     return;
   if (!profile_record)
     profile_record = XCNEWVEC (struct profile_record,
-			       passes_by_id_size);
-  gcc_assert (index < passes_by_id_size && index >= 0);
+			       passes->passes_by_id_size);
+  gcc_assert (index < passes->passes_by_id_size && index >= 0);
   gcc_assert (subpass < 2);
   profile_record[index].run |= run;
   account_profile_record (&profile_record[index], subpass);
@@ -1448,6 +1472,12 @@ check_profile_consistency (int index, int subpass, bool run)
 void
 dump_profile_report (void)
 {
+  g->get_passes ()->dump_profile_report ();
+}
+
+void
+pass_manager::dump_profile_report () const
+{
   int i, j;
   int last_freq_in = 0, last_count_in = 0, last_freq_out = 0, last_count_out = 0;
   gcov_type last_time = 0, last_size = 0;
@@ -2067,14 +2097,15 @@ ipa_write_summaries_2 (struct opt_pass *pass, struct lto_out_decl_state *state)
 static void
 ipa_write_summaries_1 (lto_symtab_encoder_t encoder)
 {
+  pass_manager *passes = g->get_passes ();
   struct lto_out_decl_state *state = lto_new_out_decl_state ();
   state->symtab_node_encoder = encoder;
 
   lto_push_out_decl_state (state);
 
   gcc_assert (!flag_wpa);
-  ipa_write_summaries_2 (all_regular_ipa_passes, state);
-  ipa_write_summaries_2 (all_lto_gen_passes, state);
+  ipa_write_summaries_2 (passes->all_regular_ipa_passes, state);
+  ipa_write_summaries_2 (passes->all_lto_gen_passes, state);
 
   gcc_assert (lto_get_out_decl_state () == state);
   lto_pop_out_decl_state ();
@@ -2205,8 +2236,9 @@ ipa_write_optimization_summaries (lto_symtab_encoder_t encoder)
     }
 
   gcc_assert (flag_wpa);
-  ipa_write_optimization_summaries_1 (all_regular_ipa_passes, state);
-  ipa_write_optimization_summaries_1 (all_lto_gen_passes, state);
+  pass_manager *passes = g->get_passes ();
+  ipa_write_optimization_summaries_1 (passes->all_regular_ipa_passes, state);
+  ipa_write_optimization_summaries_1 (passes->all_lto_gen_passes, state);
 
   gcc_assert (lto_get_out_decl_state () == state);
   lto_pop_out_decl_state ();
@@ -2259,8 +2291,9 @@ ipa_read_summaries_1 (struct opt_pass *pass)
 void
 ipa_read_summaries (void)
 {
-  ipa_read_summaries_1 (all_regular_ipa_passes);
-  ipa_read_summaries_1 (all_lto_gen_passes);
+  pass_manager *passes = g->get_passes ();
+  ipa_read_summaries_1 (passes->all_regular_ipa_passes);
+  ipa_read_summaries_1 (passes->all_lto_gen_passes);
 }
 
 /* Same as execute_pass_list but assume that subpasses of IPA passes
@@ -2308,8 +2341,9 @@ ipa_read_optimization_summaries_1 (struct opt_pass *pass)
 void
 ipa_read_optimization_summaries (void)
 {
-  ipa_read_optimization_summaries_1 (all_regular_ipa_passes);
-  ipa_read_optimization_summaries_1 (all_lto_gen_passes);
+  pass_manager *passes = g->get_passes ();
+  ipa_read_optimization_summaries_1 (passes->all_regular_ipa_passes);
+  ipa_read_optimization_summaries_1 (passes->all_lto_gen_passes);
 }
 
 /* Same as execute_pass_list but assume that subpasses of IPA passes
@@ -2384,7 +2418,8 @@ execute_ipa_stmt_fixups (struct opt_pass *pass,
 void
 execute_all_ipa_stmt_fixups (struct cgraph_node *node, gimple *stmts)
 {
-  execute_ipa_stmt_fixups (all_regular_ipa_passes, node, stmts);
+  pass_manager *passes = g->get_passes ();
+  execute_ipa_stmt_fixups (passes->all_regular_ipa_passes, node, stmts);
 }