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/* Insert USEs in instructions that require mode switching.
This should probably be merged into mode-switching.c .
Copyright (C) 2011-2013 Free Software Foundation, Inc.
Contributed by Embecosm on behalf of Adapteva, 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 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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 COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "rtl.h"
#include "function.h"
#include "emit-rtl.h"
#include "tree-pass.h"
#include "insn-attr.h"
#include "insn-config.h"
#include "recog.h"
#include "tm_p.h"
#include "df.h"
#ifndef TARGET_INSERT_MODE_SWITCH_USE
#define TARGET_INSERT_MODE_SWITCH_USE NULL
#endif
static unsigned int
insert_uses (void)
{
static const int num_modes[] = NUM_MODES_FOR_MODE_SWITCHING;
#define N_ENTITIES ARRAY_SIZE (num_modes)
int e;
void (*target_insert_mode_switch_use) (rtx insn, int, int)
= TARGET_INSERT_MODE_SWITCH_USE;
for (e = N_ENTITIES - 1; e >= 0; e--)
{
int no_mode = num_modes[e];
rtx insn;
int mode;
if (!OPTIMIZE_MODE_SWITCHING (e))
continue;
for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
{
if (!INSN_P (insn))
continue;
mode = MODE_NEEDED (e, insn);
if (mode == no_mode)
continue;
if (target_insert_mode_switch_use)
{
target_insert_mode_switch_use (insn, e, mode);
df_insn_rescan (insn);
}
}
}
return 0;
}
namespace {
const pass_data pass_data_mode_switch_use =
{
RTL_PASS, /* type */
"mode_switch_use", /* name */
OPTGROUP_NONE, /* optinfo_flags */
false, /* has_gate */
true, /* has_execute */
TV_NONE, /* tv_id */
0, /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
0, /* todo_flags_finish */
};
class pass_mode_switch_use : public rtl_opt_pass
{
public:
pass_mode_switch_use(gcc::context *ctxt)
: rtl_opt_pass(pass_data_mode_switch_use, ctxt)
{}
/* opt_pass methods: */
unsigned int execute () { return insert_uses (); }
}; // class pass_mode_switch_use
} // anon namespace
rtl_opt_pass *
make_pass_mode_switch_use (gcc::context *ctxt)
{
return new pass_mode_switch_use (ctxt);
}
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