/* Loop optimizer initialization routines and RTL loop optimization passes.
- Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ Free Software Foundation, Inc.
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) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "tree-pass.h"
#include "timevar.h"
#include "flags.h"
+#include "df.h"
#include "ggc.h"
\f
flow_loops_find (loops);
current_loops = loops;
- if (number_of_loops () <= 1)
- {
- /* No loops (the 1 returned by number_of_loops corresponds to the fake
- loop that we put as a root of the loop tree). */
- loop_optimizer_finalize ();
- return;
- }
-
if (flags & LOOPS_MAY_HAVE_MULTIPLE_LATCHES)
{
/* If the loops may have multiple latches, we cannot canonicalize
passes may want. */
gcc_assert ((flags & ~(LOOPS_MAY_HAVE_MULTIPLE_LATCHES
| LOOPS_HAVE_RECORDED_EXITS)) == 0);
- current_loops->state = LOOPS_MAY_HAVE_MULTIPLE_LATCHES;
+ loops_state_set (LOOPS_MAY_HAVE_MULTIPLE_LATCHES);
}
else
disambiguate_loops_with_multiple_latches ();
/* Create pre-headers. */
if (flags & LOOPS_HAVE_PREHEADERS)
- create_preheaders (CP_SIMPLE_PREHEADERS);
+ {
+ int cp_flags = CP_SIMPLE_PREHEADERS;
+
+ if (flags & LOOPS_HAVE_FALLTHRU_PREHEADERS)
+ cp_flags |= CP_FALLTHRU_PREHEADERS;
+
+ create_preheaders (cp_flags);
+ }
/* Force all latches to have only single successor. */
if (flags & LOOPS_HAVE_SIMPLE_LATCHES)
struct loop *loop;
basic_block bb;
- if (!current_loops)
- return;
+ gcc_assert (current_loops != NULL);
FOR_EACH_LOOP (li, loop, 0)
{
}
/* Clean up. */
- if (current_loops->state & LOOPS_HAVE_RECORDED_EXITS)
+ if (loops_state_satisfies_p (LOOPS_HAVE_RECORDED_EXITS))
release_recorded_exits ();
flow_loops_free (current_loops);
ggc_free (current_loops);
/* Checking. */
#ifdef ENABLE_CHECKING
- verify_flow_info ();
+ /* FIXME: no point to verify flow info after bundling on ia64. Use this
+ hack for achieving this. */
+ if (!reload_completed)
+ verify_flow_info ();
#endif
}
));
}
-struct tree_opt_pass pass_loop2 =
+struct rtl_opt_pass pass_loop2 =
{
+ {
+ RTL_PASS,
"loop2", /* name */
gate_handle_loop2, /* gate */
NULL, /* execute */
0, /* properties_destroyed */
0, /* todo_flags_start */
TODO_dump_func |
- TODO_ggc_collect, /* todo_flags_finish */
- 'L' /* letter */
+ TODO_ggc_collect /* todo_flags_finish */
+ }
};
\f
return 0;
}
-struct tree_opt_pass pass_rtl_loop_init =
+struct rtl_opt_pass pass_rtl_loop_init =
{
+ {
+ RTL_PASS,
"loop2_init", /* name */
NULL, /* gate */
rtl_loop_init, /* execute */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- TODO_dump_func, /* todo_flags_finish */
- 'L' /* letter */
+ TODO_dump_func | TODO_verify_rtl_sharing /* todo_flags_finish */
+ }
};
\f
loop_optimizer_finalize ();
free_dominance_info (CDI_DOMINATORS);
- cleanup_cfg (CLEANUP_EXPENSIVE);
- delete_trivially_dead_insns (get_insns (), max_reg_num ());
- reg_scan (get_insns (), max_reg_num ());
+ cleanup_cfg (0);
if (dump_file)
dump_flow_info (dump_file, dump_flags);
return 0;
}
-struct tree_opt_pass pass_rtl_loop_done =
+struct rtl_opt_pass pass_rtl_loop_done =
{
+ {
+ RTL_PASS,
"loop2_done", /* name */
NULL, /* gate */
rtl_loop_done, /* execute */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- TODO_dump_func, /* todo_flags_finish */
- 'L' /* letter */
+ TODO_dump_func | TODO_verify_rtl_sharing /* todo_flags_finish */
+ }
};
\f
static unsigned int
rtl_move_loop_invariants (void)
{
- if (current_loops)
+ if (number_of_loops () > 1)
move_loop_invariants ();
return 0;
}
-struct tree_opt_pass pass_rtl_move_loop_invariants =
+struct rtl_opt_pass pass_rtl_move_loop_invariants =
{
- "loop2_invariant", /* name */
+ {
+ RTL_PASS,
+ "loop2_invariant", /* name */
gate_rtl_move_loop_invariants, /* gate */
rtl_move_loop_invariants, /* execute */
NULL, /* sub */
0, /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
- 0, /* todo_flags_start */
- TODO_dump_func, /* todo_flags_finish */
- 'L' /* letter */
+ 0, /* todo_flags_start */
+ TODO_df_verify |
+ TODO_df_finish | TODO_verify_rtl_sharing |
+ TODO_dump_func /* todo_flags_finish */
+ }
};
\f
static unsigned int
rtl_unswitch (void)
{
- if (current_loops)
+ if (number_of_loops () > 1)
unswitch_loops ();
return 0;
}
-struct tree_opt_pass pass_rtl_unswitch =
+struct rtl_opt_pass pass_rtl_unswitch =
{
+ {
+ RTL_PASS,
"loop2_unswitch", /* name */
gate_rtl_unswitch, /* gate */
rtl_unswitch, /* execute */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- TODO_dump_func, /* todo_flags_finish */
- 'L' /* letter */
+ TODO_dump_func | TODO_verify_rtl_sharing, /* todo_flags_finish */
+ }
};
\f
static unsigned int
rtl_unroll_and_peel_loops (void)
{
- if (current_loops)
+ if (number_of_loops () > 1)
{
int flags = 0;
+ if (dump_file)
+ df_dump (dump_file);
if (flag_peel_loops)
flags |= UAP_PEEL;
return 0;
}
-struct tree_opt_pass pass_rtl_unroll_and_peel_loops =
+struct rtl_opt_pass pass_rtl_unroll_and_peel_loops =
{
+ {
+ RTL_PASS,
"loop2_unroll", /* name */
gate_rtl_unroll_and_peel_loops, /* gate */
rtl_unroll_and_peel_loops, /* execute */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- TODO_dump_func, /* todo_flags_finish */
- 'L' /* letter */
+ TODO_dump_func | TODO_verify_rtl_sharing, /* todo_flags_finish */
+ }
};
\f
rtl_doloop (void)
{
#ifdef HAVE_doloop_end
- if (current_loops)
+ if (number_of_loops () > 1)
doloop_optimize_loops ();
#endif
return 0;
}
-struct tree_opt_pass pass_rtl_doloop =
+struct rtl_opt_pass pass_rtl_doloop =
{
+ {
+ RTL_PASS,
"loop2_doloop", /* name */
gate_rtl_doloop, /* gate */
rtl_doloop, /* execute */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- TODO_dump_func, /* todo_flags_finish */
- 'L' /* letter */
+ TODO_dump_func | TODO_verify_rtl_sharing /* todo_flags_finish */
+ }
};
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