1 /* Insert USEs in instructions that require mode switching.
2 This should probably be merged into mode-switching.c .
3 Copyright (C) 2011 Free Software Foundation, Inc.
4 Contributed by Embecosm on behalf of Adapteva, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
29 #include "tree-pass.h"
30 #include "insn-attr.h"
31 #include "insn-config.h"
36 #ifndef TARGET_INSERT_MODE_SWITCH_USE
37 #define TARGET_INSERT_MODE_SWITCH_USE NULL
43 static const int num_modes[] = NUM_MODES_FOR_MODE_SWITCHING;
44 #define N_ENTITIES ARRAY_SIZE (num_modes)
46 void (*target_insert_mode_switch_use) (rtx insn, int, int)
47 = TARGET_INSERT_MODE_SWITCH_USE;
49 for (e = N_ENTITIES - 1; e >= 0; e--)
51 int no_mode = num_modes[e];
55 if (!OPTIMIZE_MODE_SWITCHING (e))
57 for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
61 mode = MODE_NEEDED (e, insn);
64 if (target_insert_mode_switch_use)
66 target_insert_mode_switch_use (insn, e, mode);
67 df_insn_rescan (insn);
74 struct rtl_opt_pass pass_mode_switch_use =
78 "mode_switch_use", /* name */
80 insert_uses, /* execute */
83 0, /* static_pass_number */
85 0, /* properties_required */
86 0, /* properties_provided */
87 0, /* properties_destroyed */
88 0, /* todo_flags_start */
89 0, /* todo_flags_finish */