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annotate gcc/c-family/c-semantics.c @ 118:fd00160c1b76

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ifdef TARGET_64BIT
author mir3636
date Tue, 27 Feb 2018 15:01:35 +0900
parents 04ced10e8804
children 84e7813d76e9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
68
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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1 /* This file contains subroutine used by the C front-end to construct GENERIC.
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2 Copyright (C) 2000-2017 Free Software Foundation, Inc.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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3 Written by Benjamin Chelf (chelf@codesourcery.com).
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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4
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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5 This file is part of GCC.
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6
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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7 GCC is free software; you can redistribute it and/or modify it under
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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8 the terms of the GNU General Public License as published by the Free
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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9 Software Foundation; either version 3, or (at your option) any later
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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10 version.
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11
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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15 for more details.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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16
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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17 You should have received a copy of the GNU General Public License
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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18 along with GCC; see the file COPYING3. If not see
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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19 <http://www.gnu.org/licenses/>. */
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20
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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21 #include "config.h"
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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22 #include "system.h"
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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23 #include "coretypes.h"
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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24 #include "c-common.h"
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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25 #include "tree-iterator.h"
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26
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27 /* Create an empty statement tree rooted at T. */
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28
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29 tree
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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30 push_stmt_list (void)
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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31 {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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32 tree t;
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33 t = alloc_stmt_list ();
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34 vec_safe_push (stmt_list_stack, t);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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35 return t;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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36 }
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37
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38 /* Finish the statement tree rooted at T. */
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39
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40 tree
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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41 pop_stmt_list (tree t)
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42 {
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43 tree u = NULL_TREE;
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44
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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45 /* Pop statement lists until we reach the target level. The extra
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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46 nestings will be due to outstanding cleanups. */
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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47 while (1)
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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48 {
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49 u = stmt_list_stack->pop ();
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50 if (!stmt_list_stack->is_empty ())
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51 {
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52 tree x = stmt_list_stack->last ();
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53 STATEMENT_LIST_HAS_LABEL (x) |= STATEMENT_LIST_HAS_LABEL (u);
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54 }
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55 if (t == u)
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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56 break;
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57 }
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58
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59 gcc_assert (u != NULL_TREE);
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60
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61 /* If the statement list is completely empty, just return it. This is
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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62 just as good small as build_empty_stmt, with the advantage that
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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63 statement lists are merged when they appended to one another. So
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64 using the STATEMENT_LIST avoids pathological buildup of EMPTY_STMT_P
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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65 statements. */
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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66 if (TREE_SIDE_EFFECTS (t))
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67 {
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68 tree_stmt_iterator i = tsi_start (t);
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69
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70 /* If the statement list contained exactly one statement, then
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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71 extract it immediately. */
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72 if (tsi_one_before_end_p (i))
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73 {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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74 u = tsi_stmt (i);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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75 tsi_delink (&i);
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76 free_stmt_list (t);
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77 t = u;
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78 }
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79 }
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80
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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81 return t;
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82 }
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83
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84 /* Build a generic statement based on the given type of node and
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85 arguments. Similar to `build_nt', except that we set
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86 EXPR_LOCATION to LOC. */
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87 /* ??? This should be obsolete with the lineno_stmt productions
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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88 in the grammar. */
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89
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90 tree
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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91 build_stmt (location_t loc, enum tree_code code, ...)
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92 {
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93 tree ret;
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94 int length, i;
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95 va_list p;
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96 bool side_effects;
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97
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98 /* This function cannot be used to construct variably-sized nodes. */
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99 gcc_assert (TREE_CODE_CLASS (code) != tcc_vl_exp);
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100
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101 va_start (p, code);
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102
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103 ret = make_node (code);
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104 TREE_TYPE (ret) = void_type_node;
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105 length = TREE_CODE_LENGTH (code);
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106 SET_EXPR_LOCATION (ret, loc);
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107
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108 /* TREE_SIDE_EFFECTS will already be set for statements with
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109 implicit side effects. Here we make sure it is set for other
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110 expressions by checking whether the parameters have side
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111 effects. */
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112
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113 side_effects = false;
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114 for (i = 0; i < length; i++)
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115 {
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116 tree t = va_arg (p, tree);
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117 if (t && !TYPE_P (t))
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118 side_effects |= TREE_SIDE_EFFECTS (t);
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119 TREE_OPERAND (ret, i) = t;
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120 }
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121
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122 TREE_SIDE_EFFECTS (ret) |= side_effects;
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123
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124 va_end (p);
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125 return ret;
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126 }
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127
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128 /* Build a REALPART_EXPR or IMAGPART_EXPR, according to CODE, from ARG. */
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129
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130 tree
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131 build_real_imag_expr (location_t location, enum tree_code code, tree arg)
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132 {
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133 tree ret;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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134 tree arg_type = TREE_TYPE (arg);
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135
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
136 gcc_assert (code == REALPART_EXPR || code == IMAGPART_EXPR);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
137
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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138 if (TREE_CODE (arg_type) == COMPLEX_TYPE)
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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139 {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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140 ret = build1 (code, TREE_TYPE (TREE_TYPE (arg)), arg);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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141 SET_EXPR_LOCATION (ret, location);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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142 }
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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143 else if (INTEGRAL_TYPE_P (arg_type) || SCALAR_FLOAT_TYPE_P (arg_type))
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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144 {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
145 ret = (code == REALPART_EXPR
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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146 ? arg
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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147 : omit_one_operand_loc (location, arg_type,
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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148 integer_zero_node, arg));
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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149 }
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
150 else
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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151 {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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152 error_at (location, "wrong type argument to %s",
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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153 code == REALPART_EXPR ? "__real" : "__imag");
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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154 ret = error_mark_node;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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155 }
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
156
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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157 return ret;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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158 }