/* Top-level control of tree optimizations.
- Copyright 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
+ Free Software Foundation, Inc.
Contributed by Diego Novillo <dnovillo@redhat.com>
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "tree.h"
-#include "rtl.h"
#include "tm_p.h"
-#include "hard-reg-set.h"
-#include "basic-block.h"
-#include "output.h"
-#include "expr.h"
-#include "diagnostic.h"
#include "basic-block.h"
#include "flags.h"
#include "tree-flow.h"
-#include "tree-dump.h"
-#include "timevar.h"
#include "function.h"
#include "langhooks.h"
+#include "diagnostic-core.h"
#include "toplev.h"
#include "flags.h"
#include "cgraph.h"
#include "tree-inline.h"
-#include "tree-mudflap.h"
#include "tree-pass.h"
#include "ggc.h"
#include "cgraph.h"
#include "graph.h"
#include "cfgloop.h"
#include "except.h"
+#include "plugin.h"
-/* Global variables used to communicate with passes. */
-int dump_flags;
-bool in_gimple_form;
-
-/* The root of the compilation pass tree, once constructed. */
-static struct tree_opt_pass *all_passes, *all_ipa_passes, * all_lowering_passes;
-
-/* Gate: execute, or not, all of the non-trivial optimizations. */
-
-static bool
-gate_all_optimizations (void)
-{
- return (optimize >= 1
- /* Don't bother doing anything if the program has errors. */
- && !(errorcount || sorrycount));
-}
-
-static struct tree_opt_pass pass_all_optimizations =
-{
- NULL, /* name */
- gate_all_optimizations, /* gate */
- NULL, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- 0, /* tv_id */
- 0, /* properties_required */
- 0, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- 0, /* todo_flags_finish */
- 0 /* letter */
-};
/* Pass: cleanup the CFG just before expanding trees to RTL.
This is just a round of label cleanups and case node grouping
because after the tree optimizers have run such cleanups may
be necessary. */
-static void
+static unsigned int
execute_cleanup_cfg_post_optimizing (void)
{
- cleanup_tree_cfg ();
+ unsigned int todo = 0;
+ if (cleanup_tree_cfg ())
+ todo |= TODO_update_ssa;
+ maybe_remove_unreachable_handlers ();
cleanup_dead_labels ();
group_case_labels ();
+ if ((flag_compare_debug_opt || flag_compare_debug)
+ && flag_dump_final_insns)
+ {
+ FILE *final_output = fopen (flag_dump_final_insns, "a");
+
+ if (!final_output)
+ {
+ error ("could not open final insn dump file %qs: %m",
+ flag_dump_final_insns);
+ flag_dump_final_insns = NULL;
+ }
+ else
+ {
+ int save_unnumbered = flag_dump_unnumbered;
+ int save_noaddr = flag_dump_noaddr;
+
+ flag_dump_noaddr = flag_dump_unnumbered = 1;
+ fprintf (final_output, "\n");
+ dump_enumerated_decls (final_output, dump_flags | TDF_NOUID);
+ flag_dump_noaddr = save_noaddr;
+ flag_dump_unnumbered = save_unnumbered;
+ if (fclose (final_output))
+ {
+ error ("could not close final insn dump file %qs: %m",
+ flag_dump_final_insns);
+ flag_dump_final_insns = NULL;
+ }
+ }
+ }
+ return todo;
}
-static struct tree_opt_pass pass_cleanup_cfg_post_optimizing =
+struct gimple_opt_pass pass_cleanup_cfg_post_optimizing =
{
- "final_cleanup", /* name */
+ {
+ GIMPLE_PASS,
+ "optimized", /* name */
NULL, /* gate */
execute_cleanup_cfg_post_optimizing, /* execute */
NULL, /* sub */
NULL, /* next */
0, /* static_pass_number */
- 0, /* tv_id */
+ TV_TREE_CLEANUP_CFG, /* tv_id */
PROP_cfg, /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- TODO_dump_func, /* todo_flags_finish */
- 0 /* letter */
+ TODO_remove_unused_locals /* todo_flags_finish */
+ }
};
-/* Pass: do the actions required to finish with tree-ssa optimization
- passes. */
-
-static void
-execute_free_datastructures (void)
-{
- tree *chain;
-
- /* ??? This isn't the right place for this. Worse, it got computed
- more or less at random in various passes. */
- free_dominance_info (CDI_DOMINATORS);
-
- /* Emit gotos for implicit jumps. */
- disband_implicit_edges ();
-
- /* Remove the ssa structures. Do it here since this includes statement
- annotations that need to be intact during disband_implicit_edges. */
- delete_tree_ssa ();
-
- /* Re-chain the statements from the blocks. */
- chain = &DECL_SAVED_TREE (current_function_decl);
- *chain = alloc_stmt_list ();
-
- /* And get rid of annotations we no longer need. */
- delete_tree_cfg_annotations ();
-}
+/* IPA passes, compilation of earlier functions or inlining
+ might have changed some properties, such as marked functions nothrow,
+ pure, const or noreturn.
+ Remove redundant edges and basic blocks, and create new ones if necessary.
-static struct tree_opt_pass pass_free_datastructures =
-{
- NULL, /* name */
- NULL, /* gate */
- execute_free_datastructures, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- 0, /* tv_id */
- PROP_cfg, /* properties_required */
- 0, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- 0, /* todo_flags_finish */
- 0 /* letter */
-};
-
-/* Pass: fixup_cfg - IPA passes or compilation of earlier functions might've
- changed some properties - such as marked functions nothrow. Remove now
- redundant edges and basic blocks. */
+ This pass can't be executed as stand alone pass from pass manager, because
+ in between inlining and this fixup the verify_flow_info would fail. */
-static void
+unsigned int
execute_fixup_cfg (void)
{
basic_block bb;
- block_stmt_iterator bsi;
-
- if (cfun->eh)
- FOR_EACH_BB (bb)
- {
- for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi))
- {
- tree stmt = bsi_stmt (bsi);
- tree call = get_call_expr_in (stmt);
-
- if (call && call_expr_flags (call) & (ECF_CONST | ECF_PURE))
- TREE_SIDE_EFFECTS (call) = 0;
- if (!tree_could_throw_p (stmt) && lookup_stmt_eh_region (stmt))
- remove_stmt_from_eh_region (stmt);
- }
- tree_purge_dead_eh_edges (bb);
- }
-
- cleanup_tree_cfg ();
-}
-
-static struct tree_opt_pass pass_fixup_cfg =
-{
- NULL, /* name */
- NULL, /* gate */
- execute_fixup_cfg, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- 0, /* tv_id */
- PROP_cfg, /* properties_required */
- 0, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- 0, /* todo_flags_finish */
- 0 /* letter */
-};
-
-/* Do the actions required to initialize internal data structures used
- in tree-ssa optimization passes. */
-
-static void
-execute_init_datastructures (void)
-{
- /* Allocate hash tables, arrays and other structures. */
- init_tree_ssa ();
-}
-
-static struct tree_opt_pass pass_init_datastructures =
-{
- NULL, /* name */
- NULL, /* gate */
- execute_init_datastructures, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- 0, /* tv_id */
- PROP_cfg, /* properties_required */
- 0, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- 0, /* todo_flags_finish */
- 0 /* letter */
-};
-
-/* Iterate over the pass tree allocating dump file numbers. We want
- to do this depth first, and independent of whether the pass is
- enabled or not. */
-
-static void
-register_one_dump_file (struct tree_opt_pass *pass, bool ipa, int n)
-{
- char *dot_name, *flag_name, *glob_name;
- char num[10];
-
- /* See below in next_pass_1. */
- num[0] = '\0';
- if (pass->static_pass_number != -1)
- sprintf (num, "%d", ((int) pass->static_pass_number < 0
- ? 1 : pass->static_pass_number));
-
- dot_name = concat (".", pass->name, num, NULL);
- if (ipa)
- {
- flag_name = concat ("ipa-", pass->name, num, NULL);
- glob_name = concat ("ipa-", pass->name, NULL);
- /* First IPA dump is cgraph that is dumped via separate channels. */
- pass->static_pass_number = dump_register (dot_name, flag_name, glob_name,
- TDF_IPA, n + 1, 0);
- }
- else if (pass->properties_provided & PROP_trees)
- {
- flag_name = concat ("tree-", pass->name, num, NULL);
- glob_name = concat ("tree-", pass->name, NULL);
- pass->static_pass_number = dump_register (dot_name, flag_name, glob_name,
- TDF_TREE, n + TDI_tree_all, 0);
- }
+ gimple_stmt_iterator gsi;
+ int todo = gimple_in_ssa_p (cfun) ? TODO_verify_ssa : 0;
+ gcov_type count_scale;
+ edge e;
+ edge_iterator ei;
+
+ if (ENTRY_BLOCK_PTR->count)
+ count_scale = ((cgraph_get_node (current_function_decl)->count
+ * REG_BR_PROB_BASE + ENTRY_BLOCK_PTR->count / 2)
+ / ENTRY_BLOCK_PTR->count);
else
- {
- flag_name = concat ("rtl-", pass->name, num, NULL);
- glob_name = concat ("rtl-", pass->name, NULL);
- pass->static_pass_number = dump_register (dot_name, flag_name, glob_name,
- TDF_RTL, n, pass->letter);
- }
-}
-
-static int
-register_dump_files (struct tree_opt_pass *pass, bool ipa, int properties)
-{
- static int n = 0;
- do
- {
- int new_properties;
- int pass_number;
+ count_scale = REG_BR_PROB_BASE;
- pass->properties_required = properties;
- new_properties =
- (properties | pass->properties_provided) & ~pass->properties_destroyed;
+ ENTRY_BLOCK_PTR->count = cgraph_get_node (current_function_decl)->count;
+ EXIT_BLOCK_PTR->count = (EXIT_BLOCK_PTR->count * count_scale
+ + REG_BR_PROB_BASE / 2) / REG_BR_PROB_BASE;
- /* Reset the counter when we reach RTL-based passes. */
- if ((pass->properties_provided ^ pass->properties_required) & PROP_rtl)
- n = 0;
+ FOR_EACH_EDGE (e, ei, ENTRY_BLOCK_PTR->succs)
+ e->count = (e->count * count_scale
+ + REG_BR_PROB_BASE / 2) / REG_BR_PROB_BASE;
- pass_number = n;
- if (pass->name)
- n++;
-
- if (pass->sub)
- new_properties = register_dump_files (pass->sub, ipa, new_properties);
-
- /* If we have a gate, combine the properties that we could have with
- and without the pass being examined. */
- if (pass->gate)
- properties &= new_properties;
- else
- properties = new_properties;
-
- pass->properties_provided = properties;
- if (pass->name)
- register_one_dump_file (pass, ipa, pass_number);
-
- pass = pass->next;
- }
- while (pass);
-
- return properties;
-}
-
-/* Add a pass to the pass list. Duplicate the pass if it's already
- in the list. */
-
-static struct tree_opt_pass **
-next_pass_1 (struct tree_opt_pass **list, struct tree_opt_pass *pass)
-{
-
- /* A nonzero static_pass_number indicates that the
- pass is already in the list. */
- if (pass->static_pass_number)
- {
- struct tree_opt_pass *new;
-
- new = xmalloc (sizeof (*new));
- memcpy (new, pass, sizeof (*new));
-
- /* Indicate to register_dump_files that this pass has duplicates,
- and so it should rename the dump file. The first instance will
- be -1, and be number of duplicates = -static_pass_number - 1.
- Subsequent instances will be > 0 and just the duplicate number. */
- if (pass->name)
- {
- pass->static_pass_number -= 1;
- new->static_pass_number = -pass->static_pass_number;
- }
-
- *list = new;
- }
- else
+ FOR_EACH_BB (bb)
{
- pass->static_pass_number = -1;
- *list = pass;
- }
-
- return &(*list)->next;
-
-}
-
-/* Construct the pass tree. */
-
-void
-init_tree_optimization_passes (void)
-{
- struct tree_opt_pass **p;
-
-#define NEXT_PASS(PASS) (p = next_pass_1 (p, &PASS))
- /* Intraprocedural optimization passes. */
- p = &all_ipa_passes;
- NEXT_PASS (pass_ipa_inline);
- *p = NULL;
-
- /* All passes needed to lower the function into shape optimizers can operate
- on. These passes are performed before interprocedural passes, unlike rest
- of local passes (all_passes). */
- p = &all_lowering_passes;
- NEXT_PASS (pass_remove_useless_stmts);
- NEXT_PASS (pass_mudflap_1);
- NEXT_PASS (pass_lower_cf);
- NEXT_PASS (pass_lower_eh);
- NEXT_PASS (pass_build_cfg);
- NEXT_PASS (pass_lower_complex_O0);
- NEXT_PASS (pass_lower_vector);
- NEXT_PASS (pass_warn_function_return);
- NEXT_PASS (pass_tree_profile);
- *p = NULL;
-
- p = &all_passes;
- NEXT_PASS (pass_fixup_cfg);
- NEXT_PASS (pass_init_datastructures);
- NEXT_PASS (pass_all_optimizations);
- NEXT_PASS (pass_warn_function_noreturn);
- NEXT_PASS (pass_mudflap_2);
- NEXT_PASS (pass_free_datastructures);
- NEXT_PASS (pass_expand);
- NEXT_PASS (pass_rest_of_compilation);
- *p = NULL;
-
- p = &pass_all_optimizations.sub;
- NEXT_PASS (pass_referenced_vars);
- NEXT_PASS (pass_create_structure_vars);
- NEXT_PASS (pass_build_ssa);
- NEXT_PASS (pass_build_pta);
- NEXT_PASS (pass_may_alias);
- NEXT_PASS (pass_del_pta);
- NEXT_PASS (pass_rename_ssa_copies);
- NEXT_PASS (pass_early_warn_uninitialized);
-
- /* Initial scalar cleanups. */
- NEXT_PASS (pass_ccp);
- NEXT_PASS (pass_fre);
- NEXT_PASS (pass_dce);
- NEXT_PASS (pass_forwprop);
- NEXT_PASS (pass_vrp);
- NEXT_PASS (pass_copy_prop);
- NEXT_PASS (pass_dce);
- NEXT_PASS (pass_merge_phi);
- NEXT_PASS (pass_dominator);
-
- NEXT_PASS (pass_phiopt);
- NEXT_PASS (pass_build_pta);
- NEXT_PASS (pass_may_alias);
- NEXT_PASS (pass_del_pta);
- NEXT_PASS (pass_tail_recursion);
- NEXT_PASS (pass_profile);
- NEXT_PASS (pass_ch);
- NEXT_PASS (pass_stdarg);
- NEXT_PASS (pass_lower_complex);
- NEXT_PASS (pass_sra);
- /* FIXME: SRA may generate arbitrary gimple code, exposing new
- aliased and call-clobbered variables. As mentioned below,
- pass_may_alias should be a TODO item. */
- NEXT_PASS (pass_may_alias);
- NEXT_PASS (pass_rename_ssa_copies);
- NEXT_PASS (pass_dominator);
- NEXT_PASS (pass_copy_prop);
- NEXT_PASS (pass_dce);
- NEXT_PASS (pass_dse);
- NEXT_PASS (pass_may_alias);
- NEXT_PASS (pass_forwprop);
- NEXT_PASS (pass_phiopt);
- NEXT_PASS (pass_store_ccp);
- NEXT_PASS (pass_store_copy_prop);
- NEXT_PASS (pass_fold_builtins);
- /* FIXME: May alias should a TODO but for 4.0.0,
- we add may_alias right after fold builtins
- which can create arbitrary GIMPLE. */
- NEXT_PASS (pass_may_alias);
- NEXT_PASS (pass_cse_reciprocals);
- NEXT_PASS (pass_split_crit_edges);
- NEXT_PASS (pass_reassoc);
- NEXT_PASS (pass_pre);
- NEXT_PASS (pass_sink_code);
- NEXT_PASS (pass_loop);
- NEXT_PASS (pass_dominator);
- NEXT_PASS (pass_copy_prop);
- NEXT_PASS (pass_cd_dce);
- /* FIXME: If DCE is not run before checking for uninitialized uses,
- we may get false warnings (e.g., testsuite/gcc.dg/uninit-5.c).
- However, this also causes us to misdiagnose cases that should be
- real warnings (e.g., testsuite/gcc.dg/pr18501.c).
-
- To fix the false positives in uninit-5.c, we would have to
- account for the predicates protecting the set and the use of each
- variable. Using a representation like Gated Single Assignment
- may help. */
- NEXT_PASS (pass_late_warn_uninitialized);
- NEXT_PASS (pass_dse);
- NEXT_PASS (pass_forwprop);
- NEXT_PASS (pass_phiopt);
- NEXT_PASS (pass_tail_calls);
- NEXT_PASS (pass_rename_ssa_copies);
- NEXT_PASS (pass_uncprop);
- NEXT_PASS (pass_del_ssa);
- NEXT_PASS (pass_nrv);
- NEXT_PASS (pass_remove_useless_vars);
- NEXT_PASS (pass_mark_used_blocks);
- NEXT_PASS (pass_cleanup_cfg_post_optimizing);
- *p = NULL;
-
- p = &pass_loop.sub;
- NEXT_PASS (pass_loop_init);
- NEXT_PASS (pass_copy_prop);
- NEXT_PASS (pass_lim);
- NEXT_PASS (pass_unswitch);
- NEXT_PASS (pass_scev_cprop);
- NEXT_PASS (pass_record_bounds);
- NEXT_PASS (pass_linear_transform);
- NEXT_PASS (pass_iv_canon);
- NEXT_PASS (pass_if_conversion);
- NEXT_PASS (pass_vectorize);
- /* NEXT_PASS (pass_may_alias) cannot be done again because the
- vectorizer creates alias relations that are not supported by
- pass_may_alias. */
- NEXT_PASS (pass_lower_vector_ssa);
- NEXT_PASS (pass_complete_unroll);
- NEXT_PASS (pass_iv_optimize);
- NEXT_PASS (pass_loop_done);
- *p = NULL;
-
-#undef NEXT_PASS
-
- register_dump_files (all_lowering_passes, false, PROP_gimple_any);
- register_dump_files (all_passes, false, PROP_gimple_any
- | PROP_gimple_lcf
- | PROP_gimple_leh
- | PROP_cfg);
- register_dump_files (all_ipa_passes, true, PROP_gimple_any
- | PROP_gimple_lcf
- | PROP_gimple_leh
- | PROP_cfg);
-}
-
-static unsigned int last_verified;
-
-static void
-execute_todo (struct tree_opt_pass *pass, unsigned int flags, bool use_required)
-{
- int properties
- = use_required ? pass->properties_required : pass->properties_provided;
-
-#if defined ENABLE_CHECKING
- if (need_ssa_update_p ())
- gcc_assert (flags & TODO_update_ssa_any);
-#endif
-
- if (flags & TODO_update_ssa_any)
- {
- unsigned update_flags = flags & TODO_update_ssa_any;
- update_ssa (update_flags);
- }
-
- if (flags & TODO_cleanup_cfg)
- {
- if (current_loops)
- cleanup_tree_cfg_loop ();
- else
- cleanup_tree_cfg ();
- }
-
- if ((flags & TODO_dump_func)
- && dump_file && current_function_decl)
- {
- if (properties & PROP_trees)
- dump_function_to_file (current_function_decl,
- dump_file, dump_flags);
- else if (properties & PROP_cfg)
- print_rtl_with_bb (dump_file, get_insns ());
- else
- print_rtl (dump_file, get_insns ());
-
- /* Flush the file. If verification fails, we won't be able to
- close the file before dieing. */
- fflush (dump_file);
- }
- if ((flags & TODO_dump_cgraph)
- && dump_file && !current_function_decl)
- {
- dump_cgraph (dump_file);
- /* Flush the file. If verification fails, we won't be able to
- close the file before aborting. */
- fflush (dump_file);
- }
-
- if (flags & TODO_ggc_collect)
- {
- ggc_collect ();
- }
-
-#if defined ENABLE_CHECKING
- if ((pass->properties_required & PROP_ssa)
- && !(pass->properties_destroyed & PROP_ssa))
- verify_ssa (true);
- if (flags & TODO_verify_flow)
- verify_flow_info ();
- if (flags & TODO_verify_stmts)
- verify_stmts ();
- if (flags & TODO_verify_loops)
- verify_loop_closed_ssa ();
-#endif
-}
-
-static bool
-execute_one_pass (struct tree_opt_pass *pass)
-{
- unsigned int todo;
-
- /* See if we're supposed to run this pass. */
- if (pass->gate && !pass->gate ())
- return false;
-
- /* Note that the folders should only create gimple expressions.
- This is a hack until the new folder is ready. */
- in_gimple_form = (pass->properties_provided & PROP_trees) != 0;
-
- /* Run pre-pass verification. */
- todo = pass->todo_flags_start & ~last_verified;
- if (todo)
- execute_todo (pass, todo, true);
-
- /* If a dump file name is present, open it if enabled. */
- if (pass->static_pass_number != -1)
- {
- bool initializing_dump = !dump_initialized_p (pass->static_pass_number);
- dump_file_name = get_dump_file_name (pass->static_pass_number);
- dump_file = dump_begin (pass->static_pass_number, &dump_flags);
- if (dump_file && current_function_decl)
+ bb->count = (bb->count * count_scale
+ + REG_BR_PROB_BASE / 2) / REG_BR_PROB_BASE;
+ for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
{
- const char *dname, *aname;
- dname = lang_hooks.decl_printable_name (current_function_decl, 2);
- aname = (IDENTIFIER_POINTER
- (DECL_ASSEMBLER_NAME (current_function_decl)));
- fprintf (dump_file, "\n;; Function %s (%s)%s\n\n", dname, aname,
- cfun->function_frequency == FUNCTION_FREQUENCY_HOT
- ? " (hot)"
- : cfun->function_frequency == FUNCTION_FREQUENCY_UNLIKELY_EXECUTED
- ? " (unlikely executed)"
- : "");
+ gimple stmt = gsi_stmt (gsi);
+ tree decl = is_gimple_call (stmt)
+ ? gimple_call_fndecl (stmt)
+ : NULL;
+ if (decl)
+ {
+ int flags = gimple_call_flags (stmt);
+ if (flags & (ECF_CONST | ECF_PURE | ECF_LOOPING_CONST_OR_PURE))
+ {
+ if (gimple_purge_dead_abnormal_call_edges (bb))
+ todo |= TODO_cleanup_cfg;
+
+ if (gimple_in_ssa_p (cfun))
+ {
+ todo |= TODO_update_ssa | TODO_cleanup_cfg;
+ update_stmt (stmt);
+ }
+ }
+
+ if (flags & ECF_NORETURN
+ && fixup_noreturn_call (stmt))
+ todo |= TODO_cleanup_cfg;
+ }
+
+ if (maybe_clean_eh_stmt (stmt)
+ && gimple_purge_dead_eh_edges (bb))
+ todo |= TODO_cleanup_cfg;
}
- if (initializing_dump
- && graph_dump_format != no_graph
- && (pass->properties_provided & (PROP_cfg | PROP_rtl))
- == (PROP_cfg | PROP_rtl))
- clean_graph_dump_file (dump_file_name);
+ FOR_EACH_EDGE (e, ei, bb->succs)
+ e->count = (e->count * count_scale
+ + REG_BR_PROB_BASE / 2) / REG_BR_PROB_BASE;
}
+ if (count_scale != REG_BR_PROB_BASE)
+ compute_function_frequency ();
- /* If a timevar is present, start it. */
- if (pass->tv_id)
- timevar_push (pass->tv_id);
-
- /* Do it! */
- if (pass->execute)
- pass->execute ();
-
- /* Stop timevar. */
- if (pass->tv_id)
- timevar_pop (pass->tv_id);
-
- if (dump_file
- && (pass->properties_provided & (PROP_cfg | PROP_rtl))
- == (PROP_cfg | PROP_rtl))
- print_rtl_with_bb (dump_file, get_insns ());
-
- /* Run post-pass cleanup and verification. */
- todo = pass->todo_flags_finish;
- last_verified = todo & TODO_verify_all;
- if (todo)
- execute_todo (pass, todo, false);
-
- /* Flush and close dump file. */
- if (dump_file_name)
- {
- free ((char *) dump_file_name);
- dump_file_name = NULL;
- }
- if (dump_file)
+ /* We just processed all calls. */
+ if (cfun->gimple_df)
{
- dump_end (pass->static_pass_number, dump_file);
- dump_file = NULL;
+ VEC_free (gimple, gc, MODIFIED_NORETURN_CALLS (cfun));
+ MODIFIED_NORETURN_CALLS (cfun) = NULL;
}
- return true;
-}
-
-static void
-execute_pass_list (struct tree_opt_pass *pass)
-{
- do
- {
- if (execute_one_pass (pass) && pass->sub)
- execute_pass_list (pass->sub);
- pass = pass->next;
- }
- while (pass);
-}
-
-/* Same as execute_pass_list but assume that subpasses of IPA passes
- are local passes. */
-static void
-execute_ipa_pass_list (struct tree_opt_pass *pass)
-{
- do
- {
- if (execute_one_pass (pass) && pass->sub)
- {
- struct cgraph_node *node;
- for (node = cgraph_nodes; node; node = node->next)
- if (node->analyzed)
- {
- push_cfun (DECL_STRUCT_FUNCTION (node->decl));
- current_function_decl = node->decl;
- execute_pass_list (pass);
- free_dominance_info (CDI_DOMINATORS);
- free_dominance_info (CDI_POST_DOMINATORS);
- current_function_decl = NULL;
- pop_cfun ();
- ggc_collect ();
- }
- }
- pass = pass->next;
- }
- while (pass);
-}
-
-void
-tree_lowering_passes (tree fn)
-{
- tree saved_current_function_decl = current_function_decl;
-
- current_function_decl = fn;
- push_cfun (DECL_STRUCT_FUNCTION (fn));
- tree_register_cfg_hooks ();
- bitmap_obstack_initialize (NULL);
- execute_pass_list (all_lowering_passes);
- free_dominance_info (CDI_POST_DOMINATORS);
- compact_blocks ();
- current_function_decl = saved_current_function_decl;
- bitmap_obstack_release (NULL);
- pop_cfun ();
-}
-
-/* Execute all IPA passes. */
-void
-ipa_passes (void)
-{
- cfun = NULL;
- tree_register_cfg_hooks ();
- bitmap_obstack_initialize (NULL);
- execute_ipa_pass_list (all_ipa_passes);
- bitmap_obstack_release (NULL);
-}
-\f
+ /* Dump a textual representation of the flowgraph. */
+ if (dump_file)
+ gimple_dump_cfg (dump_file, dump_flags);
-/* Update recursively all inlined_to pointers of functions
- inlined into NODE to INLINED_TO. */
-static void
-update_inlined_to_pointers (struct cgraph_node *node,
- struct cgraph_node *inlined_to)
-{
- struct cgraph_edge *e;
- for (e = node->callees; e; e = e->next_callee)
- {
- if (e->callee->global.inlined_to)
- {
- e->callee->global.inlined_to = inlined_to;
- update_inlined_to_pointers (e->callee, inlined_to);
- }
- }
+ return todo;
}
-\f
-/* For functions-as-trees languages, this performs all optimization and
- compilation for FNDECL. */
-
-void
-tree_rest_of_compilation (tree fndecl)
+struct gimple_opt_pass pass_fixup_cfg =
{
- location_t saved_loc;
- struct cgraph_node *saved_node = NULL, *node;
-
- timevar_push (TV_EXPAND);
-
- gcc_assert (!flag_unit_at_a_time || cgraph_global_info_ready);
-
- /* Initialize the RTL code for the function. */
- current_function_decl = fndecl;
- saved_loc = input_location;
- input_location = DECL_SOURCE_LOCATION (fndecl);
- init_function_start (fndecl);
-
- /* Even though we're inside a function body, we still don't want to
- call expand_expr to calculate the size of a variable-sized array.
- We haven't necessarily assigned RTL to all variables yet, so it's
- not safe to try to expand expressions involving them. */
- cfun->x_dont_save_pending_sizes_p = 1;
- cfun->after_inlining = true;
-
- node = cgraph_node (fndecl);
-
- /* We might need the body of this function so that we can expand
- it inline somewhere else. This means not lowering some constructs
- such as exception handling. */
- if (cgraph_preserve_function_body_p (fndecl))
- {
- if (!flag_unit_at_a_time)
- {
- struct cgraph_edge *e;
-
- saved_node = cgraph_clone_node (node, node->count, 1);
- for (e = saved_node->callees; e; e = e->next_callee)
- if (!e->inline_failed)
- cgraph_clone_inlined_nodes (e, true);
- }
- cfun->saved_static_chain_decl = cfun->static_chain_decl;
- save_body (fndecl, &cfun->saved_args, &cfun->saved_static_chain_decl);
- }
-
- if (flag_inline_trees)
- {
- struct cgraph_edge *e;
- for (e = node->callees; e; e = e->next_callee)
- if (!e->inline_failed || warn_inline)
- break;
- if (e)
- {
- timevar_push (TV_INTEGRATION);
- optimize_inline_calls (fndecl);
- timevar_pop (TV_INTEGRATION);
- }
- }
- /* We are not going to maintain the cgraph edges up to date.
- Kill it so it won't confuse us. */
- while (node->callees)
- {
- /* In non-unit-at-a-time we must mark all referenced functions as needed.
- */
- if (node->callees->callee->analyzed && !flag_unit_at_a_time)
- cgraph_mark_needed_node (node->callees->callee);
- cgraph_remove_edge (node->callees);
- }
-
- /* We are not going to maintain the cgraph edges up to date.
- Kill it so it won't confuse us. */
- cgraph_node_remove_callees (node);
-
-
- /* Initialize the default bitmap obstack. */
- bitmap_obstack_initialize (NULL);
- bitmap_obstack_initialize (®_obstack); /* FIXME, only at RTL generation*/
-
- tree_register_cfg_hooks ();
- /* Perform all tree transforms and optimizations. */
- execute_pass_list (all_passes);
-
- bitmap_obstack_release (®_obstack);
-
- /* Release the default bitmap obstack. */
- bitmap_obstack_release (NULL);
-
- /* Restore original body if still needed. */
- if (cfun->saved_cfg)
- {
- DECL_ARGUMENTS (fndecl) = cfun->saved_args;
- cfun->cfg = cfun->saved_cfg;
- cfun->eh = cfun->saved_eh;
- cfun->saved_cfg = NULL;
- cfun->saved_eh = NULL;
- cfun->saved_args = NULL_TREE;
- cfun->static_chain_decl = cfun->saved_static_chain_decl;
- cfun->saved_static_chain_decl = NULL;
- /* When not in unit-at-a-time mode, we must preserve out of line copy
- representing node before inlining. Restore original outgoing edges
- using clone we created earlier. */
- if (!flag_unit_at_a_time)
- {
- struct cgraph_edge *e;
-
- node = cgraph_node (current_function_decl);
- cgraph_node_remove_callees (node);
- node->callees = saved_node->callees;
- saved_node->callees = NULL;
- update_inlined_to_pointers (node, node);
- for (e = node->callees; e; e = e->next_callee)
- e->caller = node;
- cgraph_remove_node (saved_node);
- }
- }
- else
- DECL_SAVED_TREE (fndecl) = NULL;
- cfun = 0;
-
- /* If requested, warn about function definitions where the function will
- return a value (usually of some struct or union type) which itself will
- take up a lot of stack space. */
- if (warn_larger_than && !DECL_EXTERNAL (fndecl) && TREE_TYPE (fndecl))
- {
- tree ret_type = TREE_TYPE (TREE_TYPE (fndecl));
-
- if (ret_type && TYPE_SIZE_UNIT (ret_type)
- && TREE_CODE (TYPE_SIZE_UNIT (ret_type)) == INTEGER_CST
- && 0 < compare_tree_int (TYPE_SIZE_UNIT (ret_type),
- larger_than_size))
- {
- unsigned int size_as_int
- = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (ret_type));
-
- if (compare_tree_int (TYPE_SIZE_UNIT (ret_type), size_as_int) == 0)
- warning (0, "%Jsize of return value of %qD is %u bytes",
- fndecl, fndecl, size_as_int);
- else
- warning (0, "%Jsize of return value of %qD is larger than %wd bytes",
- fndecl, fndecl, larger_than_size);
- }
- }
-
- if (!flag_inline_trees)
- {
- DECL_SAVED_TREE (fndecl) = NULL;
- if (DECL_STRUCT_FUNCTION (fndecl) == 0
- && !cgraph_node (fndecl)->origin)
- {
- /* Stop pointing to the local nodes about to be freed.
- But DECL_INITIAL must remain nonzero so we know this
- was an actual function definition.
- For a nested function, this is done in c_pop_function_context.
- If rest_of_compilation set this to 0, leave it 0. */
- if (DECL_INITIAL (fndecl) != 0)
- DECL_INITIAL (fndecl) = error_mark_node;
- }
- }
-
- input_location = saved_loc;
-
- ggc_collect ();
- timevar_pop (TV_EXPAND);
-}
+ {
+ GIMPLE_PASS,
+ "*free_cfg_annotations", /* name */
+ NULL, /* gate */
+ execute_fixup_cfg, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ TV_NONE, /* tv_id */
+ PROP_cfg, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0 /* todo_flags_finish */
+ }
+};