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comparison gcc/config/epiphany/mode-switch-use.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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children 84e7813d76e9
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68:561a7518be6b 111:04ced10e8804
1 /* Insert USEs in instructions that require mode switching.
2 This should probably be merged into mode-switching.c .
3 Copyright (C) 2011-2017 Free Software Foundation, Inc.
4 Contributed by Embecosm on behalf of Adapteva, Inc.
5
6 This file is part of GCC.
7
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)
11 any later version.
12
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.
17
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/>. */
21
22 #include "config.h"
23 #include "system.h"
24 #include "coretypes.h"
25 #include "backend.h"
26 #include "rtl.h"
27 #include "df.h"
28 #include "memmodel.h"
29 #include "tm_p.h"
30 #include "emit-rtl.h"
31 #include "tree-pass.h"
32 #include "insn-attr.h"
33
34 #ifndef TARGET_INSERT_MODE_SWITCH_USE
35 #define TARGET_INSERT_MODE_SWITCH_USE NULL
36 #endif
37
38 static unsigned int
39 insert_uses (void)
40 {
41 static const int num_modes[] = NUM_MODES_FOR_MODE_SWITCHING;
42 #define N_ENTITIES ARRAY_SIZE (num_modes)
43 int e;
44 void (*target_insert_mode_switch_use) (rtx_insn *insn, int, int)
45 = TARGET_INSERT_MODE_SWITCH_USE;
46
47 for (e = N_ENTITIES - 1; e >= 0; e--)
48 {
49 int no_mode = num_modes[e];
50 rtx_insn *insn;
51 int mode;
52
53 if (!OPTIMIZE_MODE_SWITCHING (e))
54 continue;
55 for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
56 {
57 if (!INSN_P (insn))
58 continue;
59 mode = epiphany_mode_needed (e, insn);
60 if (mode == no_mode)
61 continue;
62 if (target_insert_mode_switch_use)
63 {
64 target_insert_mode_switch_use (insn, e, mode);
65 df_insn_rescan (insn);
66 }
67 }
68 }
69 return 0;
70 }
71
72 namespace {
73
74 const pass_data pass_data_mode_switch_use =
75 {
76 RTL_PASS, /* type */
77 "mode_switch_use", /* name */
78 OPTGROUP_NONE, /* optinfo_flags */
79 TV_NONE, /* tv_id */
80 0, /* properties_required */
81 0, /* properties_provided */
82 0, /* properties_destroyed */
83 0, /* todo_flags_start */
84 0, /* todo_flags_finish */
85 };
86
87 class pass_mode_switch_use : public rtl_opt_pass
88 {
89 public:
90 pass_mode_switch_use(gcc::context *ctxt)
91 : rtl_opt_pass(pass_data_mode_switch_use, ctxt)
92 {}
93
94 /* opt_pass methods: */
95 virtual unsigned int execute (function *) { return insert_uses (); }
96
97 }; // class pass_mode_switch_use
98
99 } // anon namespace
100
101 rtl_opt_pass *
102 make_pass_mode_switch_use (gcc::context *ctxt)
103 {
104 return new pass_mode_switch_use (ctxt);
105 }