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0
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1 /* Generate code to initialize optabs from machine description.
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145
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2 Copyright (C) 1993-2020 Free Software Foundation, Inc.
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0
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20
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21 #include "bconfig.h"
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22 #include "system.h"
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23 #include "coretypes.h"
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24 #include "tm.h"
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25 #include "rtl.h"
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26 #include "errors.h"
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27 #include "gensupport.h"
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28
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29
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111
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30 #define DEF_RTL_EXPR(V, N, X, C) #V,
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0
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31
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111
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32 static const char * const rtx_upname[] = {
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33 #include "rtl.def"
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0
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34 };
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35
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111
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36 #undef DEF_RTL_EXPR
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37
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38 /* Vector in which to collect insns that match. */
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39 static vec<optab_pattern> patterns;
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0
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40
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41 static void
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111
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42 gen_insn (md_rtx_info *info)
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0
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43 {
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111
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44 optab_pattern p;
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45 if (find_optab (&p, XSTR (info->def, 0)))
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46 patterns.safe_push (p);
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47 }
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0
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48
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111
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49 static int
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50 pattern_cmp (const void *va, const void *vb)
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51 {
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52 const optab_pattern *a = (const optab_pattern *)va;
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53 const optab_pattern *b = (const optab_pattern *)vb;
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54 return a->sort_num - b->sort_num;
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55 }
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0
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56
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111
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57 static int
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58 optab_kind_cmp (const void *va, const void *vb)
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59 {
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60 const optab_def *a = (const optab_def *)va;
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61 const optab_def *b = (const optab_def *)vb;
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62 int diff = a->kind - b->kind;
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63 if (diff == 0)
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64 diff = a->op - b->op;
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65 return diff;
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66 }
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0
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67
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111
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68 static int
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69 optab_rcode_cmp (const void *va, const void *vb)
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70 {
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71 const optab_def *a = (const optab_def *)va;
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72 const optab_def *b = (const optab_def *)vb;
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73 return a->rcode - b->rcode;
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0
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74 }
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75
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111
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76 static const char *header_file_name = "init-opinit.h";
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77 static const char *source_file_name = "init-opinit.c";
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78
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79 static bool
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80 handle_arg (const char *arg)
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81 {
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82 switch (arg[1])
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83 {
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84 case 'h':
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85 header_file_name = &arg[2];
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86 return true;
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87 case 'c':
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88 source_file_name = &arg[2];
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89 return true;
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90 default:
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91 return false;
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92 }
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93 }
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94
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95 static FILE *
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96 open_outfile (const char *file_name)
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97 {
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98 FILE *f = fopen (file_name, "w");
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99 if (!f)
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100 fatal ("cannot open file %s: %s", file_name, xstrerror (errno));
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101 fprintf (f,
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102 "/* Generated automatically by the program `genopinit'\n"
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103 " from the machine description file `md'. */\n\n");
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104 return f;
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105 }
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0
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106
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131
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107 /* Declare the maybe_code_for_* function for ONAME, and provide
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108 an inline definition of the assserting code_for_* wrapper. */
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109
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110 static void
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111 handle_overloaded_code_for (FILE *file, overloaded_name *oname)
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112 {
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113 fprintf (file, "\nextern insn_code maybe_code_for_%s (", oname->name);
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114 for (unsigned int i = 0; i < oname->arg_types.length (); ++i)
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115 fprintf (file, "%s%s", i == 0 ? "" : ", ", oname->arg_types[i]);
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116 fprintf (file, ");\n");
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117
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118 fprintf (file, "inline insn_code\ncode_for_%s (", oname->name);
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119 for (unsigned int i = 0; i < oname->arg_types.length (); ++i)
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120 fprintf (file, "%s%s arg%d", i == 0 ? "" : ", ", oname->arg_types[i], i);
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121 fprintf (file, ")\n{\n insn_code code = maybe_code_for_%s (", oname->name);
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122 for (unsigned int i = 0; i < oname->arg_types.length (); ++i)
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123 fprintf (file, "%sarg%d", i == 0 ? "" : ", ", i);
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124 fprintf (file,
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125 ");\n"
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126 " gcc_assert (code != CODE_FOR_nothing);\n"
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127 " return code;\n"
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128 "}\n");
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129 }
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130
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131 /* Declare the maybe_gen_* function for ONAME, and provide
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132 an inline definition of the assserting gen_* wrapper. */
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133
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134 static void
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135 handle_overloaded_gen (FILE *file, overloaded_name *oname)
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136 {
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145
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137 unsigned HOST_WIDE_INT seen = 0;
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138 for (overloaded_instance *instance = oname->first_instance->next;
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139 instance; instance = instance->next)
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140 {
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141 pattern_stats stats;
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142 get_pattern_stats (&stats, XVEC (instance->insn, 1));
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143 unsigned HOST_WIDE_INT mask
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144 = HOST_WIDE_INT_1U << stats.num_generator_args;
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145 if (seen & mask)
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146 continue;
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131
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147
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145
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148 seen |= mask;
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131
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149
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145
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150 fprintf (file, "\nextern rtx maybe_gen_%s (", oname->name);
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151 for (unsigned int i = 0; i < oname->arg_types.length (); ++i)
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152 fprintf (file, "%s%s", i == 0 ? "" : ", ", oname->arg_types[i]);
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153 for (int i = 0; i < stats.num_generator_args; ++i)
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154 fprintf (file, ", rtx");
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155 fprintf (file, ");\n");
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156
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157 fprintf (file, "inline rtx\ngen_%s (", oname->name);
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158 for (unsigned int i = 0; i < oname->arg_types.length (); ++i)
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159 fprintf (file, "%s%s arg%d", i == 0 ? "" : ", ",
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160 oname->arg_types[i], i);
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161 for (int i = 0; i < stats.num_generator_args; ++i)
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162 fprintf (file, ", rtx x%d", i);
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163 fprintf (file, ")\n{\n rtx res = maybe_gen_%s (", oname->name);
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164 for (unsigned int i = 0; i < oname->arg_types.length (); ++i)
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165 fprintf (file, "%sarg%d", i == 0 ? "" : ", ", i);
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166 for (int i = 0; i < stats.num_generator_args; ++i)
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167 fprintf (file, ", x%d", i);
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168 fprintf (file,
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169 ");\n"
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170 " gcc_assert (res);\n"
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171 " return res;\n"
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172 "}\n");
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173 }
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131
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174 }
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175
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0
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176 int
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111
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177 main (int argc, const char **argv)
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0
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178 {
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111
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179 FILE *h_file, *s_file;
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180 unsigned int i, j, n, last_kind[5];
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181 optab_pattern *p;
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0
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182
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183 progname = "genopinit";
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184
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111
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185 if (NUM_OPTABS > 0xffff || MAX_MACHINE_MODE >= 0xff)
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186 fatal ("genopinit range assumptions invalid");
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187
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188 if (!init_rtx_reader_args_cb (argc, argv, handle_arg))
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0
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189 return (FATAL_EXIT_CODE);
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190
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111
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191 h_file = open_outfile (header_file_name);
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192 s_file = open_outfile (source_file_name);
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0
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193
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194 /* Read the machine description. */
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111
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195 md_rtx_info info;
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196 while (read_md_rtx (&info))
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197 switch (GET_CODE (info.def))
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198 {
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199 case DEFINE_INSN:
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200 case DEFINE_EXPAND:
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201 gen_insn (&info);
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0
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202 break;
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203
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111
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204 default:
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205 break;
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206 }
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207
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208 /* Sort the collected patterns. */
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209 patterns.qsort (pattern_cmp);
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210
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211 /* Now that we've handled the "extra" patterns, eliminate them from
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212 the optabs array. That way they don't get in the way below. */
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213 n = num_optabs;
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214 for (i = 0; i < n; )
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215 if (optabs[i].base == NULL)
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216 optabs[i] = optabs[--n];
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217 else
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218 ++i;
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219
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220 /* Sort the (real) optabs. Better than forcing the optabs.def file to
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221 remain sorted by kind. We also scrogged any real ordering with the
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222 purging of the X patterns above. */
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223 qsort (optabs, n, sizeof (optab_def), optab_kind_cmp);
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224
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225 fprintf (h_file, "#ifndef GCC_INSN_OPINIT_H\n");
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226 fprintf (h_file, "#define GCC_INSN_OPINIT_H 1\n");
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227
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228 /* Emit the optab enumeration for the header file. */
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229 fprintf (h_file, "enum optab_tag {\n");
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230 for (i = j = 0; i < n; ++i)
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231 {
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232 optabs[i].op = i;
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233 fprintf (h_file, " %s,\n", optabs[i].name);
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234 if (optabs[i].kind != j)
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235 last_kind[j++] = i - 1;
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0
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236 }
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111
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237 fprintf (h_file, " FIRST_CONV_OPTAB = %s,\n", optabs[last_kind[0]+1].name);
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238 fprintf (h_file, " LAST_CONVLIB_OPTAB = %s,\n", optabs[last_kind[1]].name);
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239 fprintf (h_file, " LAST_CONV_OPTAB = %s,\n", optabs[last_kind[2]].name);
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240 fprintf (h_file, " FIRST_NORM_OPTAB = %s,\n", optabs[last_kind[2]+1].name);
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241 fprintf (h_file, " LAST_NORMLIB_OPTAB = %s,\n", optabs[last_kind[3]].name);
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242 fprintf (h_file, " LAST_NORM_OPTAB = %s\n", optabs[i-1].name);
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243 fprintf (h_file, "};\n\n");
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244
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245 fprintf (h_file, "#define NUM_OPTABS %u\n", n);
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246 fprintf (h_file, "#define NUM_CONVLIB_OPTABS %u\n",
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247 last_kind[1] - last_kind[0]);
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248 fprintf (h_file, "#define NUM_NORMLIB_OPTABS %u\n",
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249 last_kind[3] - last_kind[2]);
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250 fprintf (h_file, "#define NUM_OPTAB_PATTERNS %u\n",
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251 (unsigned) patterns.length ());
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252
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253 fprintf (h_file,
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254 "typedef enum optab_tag optab;\n"
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255 "typedef enum optab_tag convert_optab;\n"
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256 "typedef enum optab_tag direct_optab;\n"
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257 "\n"
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258 "struct optab_libcall_d\n"
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259 "{\n"
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260 " char libcall_suffix;\n"
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261 " const char *libcall_basename;\n"
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262 " void (*libcall_gen) (optab, const char *name,\n"
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263 " char suffix, machine_mode);\n"
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264 "};\n"
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265 "\n"
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266 "struct convert_optab_libcall_d\n"
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267 "{\n"
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268 " const char *libcall_basename;\n"
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269 " void (*libcall_gen) (convert_optab, const char *name,\n"
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270 " machine_mode, machine_mode);\n"
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271 "};\n"
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272 "\n"
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273 "/* Given an enum insn_code, access the function to construct\n"
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274 " the body of that kind of insn. */\n"
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275 "#define GEN_FCN(CODE) (insn_data[CODE].genfun)\n"
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276 "\n"
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277 "#ifdef NUM_RTX_CODE\n"
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278 "/* Contains the optab used for each rtx code, and vice-versa. */\n"
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279 "extern const optab code_to_optab_[NUM_RTX_CODE];\n"
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280 "extern const enum rtx_code optab_to_code_[NUM_OPTABS];\n"
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281 "\n"
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282 "static inline optab\n"
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283 "code_to_optab (enum rtx_code code)\n"
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284 "{\n"
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285 " return code_to_optab_[code];\n"
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286 "}\n"
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287 "\n"
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288 "static inline enum rtx_code\n"
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289 "optab_to_code (optab op)\n"
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290 "{\n"
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291 " return optab_to_code_[op];\n"
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131
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292 "}\n");
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293
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294 for (overloaded_name *oname = rtx_reader_ptr->get_overloads ();
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295 oname; oname = oname->next)
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296 {
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297 handle_overloaded_code_for (h_file, oname);
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298 handle_overloaded_gen (h_file, oname);
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299 }
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300
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301 fprintf (h_file,
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111
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302 "#endif\n"
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303 "\n"
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304 "extern const struct convert_optab_libcall_d convlib_def[NUM_CONVLIB_OPTABS];\n"
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305 "extern const struct optab_libcall_d normlib_def[NUM_NORMLIB_OPTABS];\n"
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306 "\n"
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307 "/* Returns the active icode for the given (encoded) optab. */\n"
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308 "extern enum insn_code raw_optab_handler (unsigned);\n"
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309 "extern bool swap_optab_enable (optab, machine_mode, bool);\n"
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310 "\n"
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311 "/* Target-dependent globals. */\n"
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312 "struct target_optabs {\n"
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313 " /* Patterns that are used by optabs that are enabled for this target. */\n"
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314 " bool pat_enable[NUM_OPTAB_PATTERNS];\n"
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131
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315 "\n"
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316 " /* Cache if the target supports vec_gather_load for at least one vector\n"
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317 " mode. */\n"
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318 " bool supports_vec_gather_load;\n"
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319 " bool supports_vec_gather_load_cached;\n"
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320 " bool supports_vec_scatter_store;\n"
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321 " bool supports_vec_scatter_store_cached;\n"
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111
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322 "};\n"
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323 "extern void init_all_optabs (struct target_optabs *);\n"
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324 "\n"
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325 "extern struct target_optabs default_target_optabs;\n"
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326 "extern struct target_optabs *this_fn_optabs;\n"
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327 "#if SWITCHABLE_TARGET\n"
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328 "extern struct target_optabs *this_target_optabs;\n"
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329 "#else\n"
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330 "#define this_target_optabs (&default_target_optabs)\n"
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331 "#endif\n");
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0
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332
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111
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333 fprintf (s_file,
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131
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334 "#define IN_TARGET_CODE 1\n"
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111
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335 "#include \"config.h\"\n"
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336 "#include \"system.h\"\n"
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337 "#include \"coretypes.h\"\n"
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338 "#include \"backend.h\"\n"
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339 "#include \"predict.h\"\n"
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340 "#include \"tree.h\"\n"
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341 "#include \"rtl.h\"\n"
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342 "#include \"alias.h\"\n"
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343 "#include \"varasm.h\"\n"
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344 "#include \"stor-layout.h\"\n"
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345 "#include \"calls.h\"\n"
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346 "#include \"memmodel.h\"\n"
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347 "#include \"tm_p.h\"\n"
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348 "#include \"flags.h\"\n"
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349 "#include \"insn-config.h\"\n"
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350 "#include \"expmed.h\"\n"
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351 "#include \"dojump.h\"\n"
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352 "#include \"explow.h\"\n"
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353 "#include \"emit-rtl.h\"\n"
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354 "#include \"stmt.h\"\n"
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355 "#include \"expr.h\"\n"
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356 "#include \"insn-codes.h\"\n"
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357 "#include \"optabs.h\"\n"
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358 "\n"
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359 "struct optab_pat {\n"
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360 " unsigned scode;\n"
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361 " enum insn_code icode;\n"
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362 "};\n\n");
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363
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364 fprintf (s_file,
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365 "static const struct optab_pat pats[NUM_OPTAB_PATTERNS] = {\n");
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366 for (i = 0; patterns.iterate (i, &p); ++i)
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367 fprintf (s_file, " { %#08x, CODE_FOR_%s },\n", p->sort_num, p->name);
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368 fprintf (s_file, "};\n\n");
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369
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370 fprintf (s_file, "void\ninit_all_optabs (struct target_optabs *optabs)\n{\n");
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371 fprintf (s_file, " bool *ena = optabs->pat_enable;\n");
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372 for (i = 0; patterns.iterate (i, &p); ++i)
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373 fprintf (s_file, " ena[%u] = HAVE_%s;\n", i, p->name);
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374 fprintf (s_file, "}\n\n");
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375
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376 /* Perform a binary search on a pre-encoded optab+mode*2. */
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377 /* ??? Perhaps even better to generate a minimal perfect hash.
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378 Using gperf directly is awkward since it's so geared to working
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379 with strings. Plus we have no visibility into the ordering of
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380 the hash entries, which complicates the pat_enable array. */
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381 fprintf (s_file,
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382 "static int\n"
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383 "lookup_handler (unsigned scode)\n"
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384 "{\n"
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385 " int l = 0, h = ARRAY_SIZE (pats), m;\n"
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386 " while (h > l)\n"
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387 " {\n"
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388 " m = (h + l) / 2;\n"
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389 " if (scode == pats[m].scode)\n"
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390 " return m;\n"
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391 " else if (scode < pats[m].scode)\n"
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392 " h = m;\n"
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393 " else\n"
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394 " l = m + 1;\n"
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395 " }\n"
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396 " return -1;\n"
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397 "}\n\n");
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0
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398
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111
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399 fprintf (s_file,
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400 "enum insn_code\n"
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401 "raw_optab_handler (unsigned scode)\n"
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402 "{\n"
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403 " int i = lookup_handler (scode);\n"
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404 " return (i >= 0 && this_fn_optabs->pat_enable[i]\n"
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405 " ? pats[i].icode : CODE_FOR_nothing);\n"
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406 "}\n\n");
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407
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408 fprintf (s_file,
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409 "bool\n"
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410 "swap_optab_enable (optab op, machine_mode m, bool set)\n"
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411 "{\n"
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412 " unsigned scode = (op << 16) | m;\n"
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413 " int i = lookup_handler (scode);\n"
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414 " if (i >= 0)\n"
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415 " {\n"
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416 " bool ret = this_fn_optabs->pat_enable[i];\n"
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417 " this_fn_optabs->pat_enable[i] = set;\n"
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418 " return ret;\n"
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419 " }\n"
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420 " else\n"
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421 " {\n"
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422 " gcc_assert (!set);\n"
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423 " return false;\n"
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424 " }\n"
|
|
|
425 "}\n\n");
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426
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427 /* C++ (even G++) does not support (non-trivial) designated initializers.
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428 To work around that, generate these arrays programatically rather than
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429 by our traditional multiple inclusion of def files. */
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430
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431 fprintf (s_file,
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|
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432 "const struct convert_optab_libcall_d "
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|
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433 "convlib_def[NUM_CONVLIB_OPTABS] = {\n");
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434 for (i = last_kind[0] + 1; i <= last_kind[1]; ++i)
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435 fprintf (s_file, " { %s, %s },\n", optabs[i].base, optabs[i].libcall);
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|
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436 fprintf (s_file, "};\n\n");
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437
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|
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438 fprintf (s_file,
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|
|
439 "const struct optab_libcall_d "
|
|
|
440 "normlib_def[NUM_NORMLIB_OPTABS] = {\n");
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|
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441 for (i = last_kind[2] + 1; i <= last_kind[3]; ++i)
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|
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442 fprintf (s_file, " { %s, %s, %s },\n",
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|
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443 optabs[i].suffix, optabs[i].base, optabs[i].libcall);
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444 fprintf (s_file, "};\n\n");
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445
|
|
|
446 fprintf (s_file, "enum rtx_code const optab_to_code_[NUM_OPTABS] = {\n");
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|
|
447 for (i = 0; i < n; ++i)
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|
|
448 fprintf (s_file, " %s,\n", rtx_upname[optabs[i].fcode]);
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|
|
449 fprintf (s_file, "};\n\n");
|
|
|
450
|
|
|
451 qsort (optabs, n, sizeof (optab_def), optab_rcode_cmp);
|
|
|
452
|
|
|
453 fprintf (s_file, "const optab code_to_optab_[NUM_RTX_CODE] = {\n");
|
|
|
454 for (j = 0; optabs[j].rcode == UNKNOWN; ++j)
|
|
|
455 continue;
|
|
|
456 for (i = 0; i < NON_GENERATOR_NUM_RTX_CODE; ++i)
|
|
|
457 {
|
|
|
458 if (j < n && optabs[j].rcode == i)
|
|
|
459 fprintf (s_file, " %s,\n", optabs[j++].name);
|
|
|
460 else
|
|
|
461 fprintf (s_file, " unknown_optab,\n");
|
|
|
462 }
|
|
|
463 fprintf (s_file, "};\n\n");
|
|
|
464
|
|
|
465 fprintf (h_file, "#endif\n");
|
|
|
466 return (fclose (h_file) == 0 && fclose (s_file) == 0
|
|
|
467 ? SUCCESS_EXIT_CODE : FATAL_EXIT_CODE);
|
|
0
|
468 }
|
