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111
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1 /* jit.c -- Dummy "frontend" for use during JIT-compilation.
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145
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2 Copyright (C) 2013-2020 Free Software Foundation, Inc.
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111
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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 #include "config.h"
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21 #include "system.h"
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22 #include "coretypes.h"
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23 #include "jit-playback.h"
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24 #include "stor-layout.h"
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25 #include "debug.h"
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26 #include "langhooks.h"
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27 #include "langhooks-def.h"
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28 #include "diagnostic.h"
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29
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30
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31 #include <mpfr.h>
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32
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33 /* Language-dependent contents of a type. */
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34
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35 struct GTY(()) lang_type
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36 {
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37 char dummy;
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38 };
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39
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40 /* Language-dependent contents of a decl. */
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41
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42 struct GTY((variable_size)) lang_decl
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43 {
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44 char dummy;
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45 };
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46
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47 /* Language-dependent contents of an identifier. This must include a
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48 tree_identifier. */
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49
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50 struct GTY(()) lang_identifier
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51 {
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52 struct tree_identifier common;
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53 };
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54
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55 /* The resulting tree type. */
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56
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57 union GTY((desc ("TREE_CODE (&%h.generic) == IDENTIFIER_NODE"),
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58 chain_next ("CODE_CONTAINS_STRUCT (TREE_CODE (&%h.generic), TS_COMMON) ? ((union lang_tree_node *) TREE_CHAIN (&%h.generic)) : NULL")))
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59 lang_tree_node
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60 {
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61 union tree_node GTY((tag ("0"),
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62 desc ("tree_node_structure (&%h)"))) generic;
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63 struct lang_identifier GTY((tag ("1"))) identifier;
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64 };
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65
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66 /* We don't use language_function. */
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67
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68 struct GTY(()) language_function
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69 {
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70 int dummy;
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71 };
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72
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73 /* GC-marking callback for use from jit_root_tab.
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74
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75 If there's an active playback context, call its marking method
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76 so that it can mark any pointers it references. */
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77
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78 static void my_ggc_walker (void *)
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79 {
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80 if (gcc::jit::active_playback_ctxt)
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81 gcc::jit::active_playback_ctxt->gt_ggc_mx ();
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82 }
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83
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84 const char *dummy;
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85
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86 struct ggc_root_tab jit_root_tab[] =
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87 {
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88 {
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89 &dummy, 1, 0, my_ggc_walker, NULL
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90 },
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91 LAST_GGC_ROOT_TAB
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92 };
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93
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94 /* JIT-specific implementation of diagnostic callbacks. */
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95
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96 /* Implementation of "begin_diagnostic". */
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97
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98 static void
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99 jit_begin_diagnostic (diagnostic_context */*context*/,
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100 diagnostic_info */*diagnostic*/)
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101 {
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102 gcc_assert (gcc::jit::active_playback_ctxt);
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103 JIT_LOG_SCOPE (gcc::jit::active_playback_ctxt->get_logger ());
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104
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105 /* No-op (apart from logging); the real error-handling is done in the
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106 "end_diagnostic" hook. */
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107 }
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108
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109 /* Implementation of "end_diagnostic". */
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110
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111 static void
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112 jit_end_diagnostic (diagnostic_context *context,
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113 diagnostic_info *diagnostic,
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114 diagnostic_t)
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111
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115 {
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116 gcc_assert (gcc::jit::active_playback_ctxt);
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117 JIT_LOG_SCOPE (gcc::jit::active_playback_ctxt->get_logger ());
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118
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119 /* Delegate to the playback context (and thence to the
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120 recording context). */
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121 gcc::jit::active_playback_ctxt->add_diagnostic (context, diagnostic);
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122 }
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123
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124 /* Language hooks. */
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125
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126 static bool
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127 jit_langhook_init (void)
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128 {
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129 gcc_assert (gcc::jit::active_playback_ctxt);
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130 JIT_LOG_SCOPE (gcc::jit::active_playback_ctxt->get_logger ());
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131
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132 static bool registered_root_tab = false;
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133 if (!registered_root_tab)
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134 {
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135 ggc_register_root_tab (jit_root_tab);
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136 registered_root_tab = true;
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137 }
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138
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139 gcc_assert (global_dc);
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140 global_dc->begin_diagnostic = jit_begin_diagnostic;
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141 global_dc->end_diagnostic = jit_end_diagnostic;
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142
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143 build_common_tree_nodes (false);
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144
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145 /* I don't know why this has to be done explicitly. */
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146 void_list_node = build_tree_list (NULL_TREE, void_type_node);
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147
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148 build_common_builtin_nodes ();
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149
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150 /* The default precision for floating point numbers. This is used
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151 for floating point constants with abstract type. This may
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152 eventually be controllable by a command line option. */
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153 mpfr_set_default_prec (256);
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154
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155 return true;
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156 }
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157
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158 static void
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159 jit_langhook_parse_file (void)
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160 {
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161 /* Replay the activity by the client, recorded on the context. */
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162 gcc_assert (gcc::jit::active_playback_ctxt);
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163 gcc::jit::active_playback_ctxt->replay ();
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164 }
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165
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166 static tree
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167 jit_langhook_type_for_mode (machine_mode mode, int unsignedp)
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168 {
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169 /* Build any vector types here (see PR 46805). */
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170 if (VECTOR_MODE_P (mode))
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171 {
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172 tree inner;
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173
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174 inner = jit_langhook_type_for_mode (GET_MODE_INNER (mode), unsignedp);
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175 if (inner != NULL_TREE)
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176 return build_vector_type_for_mode (inner, mode);
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177 return NULL_TREE;
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178 }
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179
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180 if (mode == TYPE_MODE (float_type_node))
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181 return float_type_node;
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182
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183 if (mode == TYPE_MODE (double_type_node))
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184 return double_type_node;
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185
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186 if (mode == TYPE_MODE (intQI_type_node))
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187 return unsignedp ? unsigned_intQI_type_node : intQI_type_node;
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188 if (mode == TYPE_MODE (intHI_type_node))
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189 return unsignedp ? unsigned_intHI_type_node : intHI_type_node;
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190 if (mode == TYPE_MODE (intSI_type_node))
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191 return unsignedp ? unsigned_intSI_type_node : intSI_type_node;
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192 if (mode == TYPE_MODE (intDI_type_node))
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193 return unsignedp ? unsigned_intDI_type_node : intDI_type_node;
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194 if (mode == TYPE_MODE (intTI_type_node))
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195 return unsignedp ? unsigned_intTI_type_node : intTI_type_node;
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196
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197 if (mode == TYPE_MODE (integer_type_node))
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198 return unsignedp ? unsigned_type_node : integer_type_node;
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199
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200 if (mode == TYPE_MODE (long_integer_type_node))
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201 return unsignedp ? long_unsigned_type_node : long_integer_type_node;
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202
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203 if (mode == TYPE_MODE (long_long_integer_type_node))
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204 return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node;
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205
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206 if (COMPLEX_MODE_P (mode))
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207 {
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208 if (mode == TYPE_MODE (complex_float_type_node))
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209 return complex_float_type_node;
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210 if (mode == TYPE_MODE (complex_double_type_node))
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211 return complex_double_type_node;
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212 if (mode == TYPE_MODE (complex_long_double_type_node))
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213 return complex_long_double_type_node;
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214 if (mode == TYPE_MODE (complex_integer_type_node) && !unsignedp)
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215 return complex_integer_type_node;
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216 }
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217
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218 /* gcc_unreachable */
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219 return NULL;
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220 }
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221
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222 /* Record a builtin function. We just ignore builtin functions. */
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223
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224 static tree
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225 jit_langhook_builtin_function (tree decl)
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226 {
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227 return decl;
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228 }
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229
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230 static bool
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231 jit_langhook_global_bindings_p (void)
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232 {
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233 gcc_unreachable ();
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234 return true;
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235 }
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236
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237 static tree
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238 jit_langhook_pushdecl (tree decl ATTRIBUTE_UNUSED)
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239 {
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240 gcc_unreachable ();
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241 }
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242
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243 static tree
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244 jit_langhook_getdecls (void)
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245 {
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246 return NULL;
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247 }
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248
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249 #undef LANG_HOOKS_NAME
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250 #define LANG_HOOKS_NAME "libgccjit"
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251
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252 #undef LANG_HOOKS_INIT
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253 #define LANG_HOOKS_INIT jit_langhook_init
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254
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255 #undef LANG_HOOKS_PARSE_FILE
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256 #define LANG_HOOKS_PARSE_FILE jit_langhook_parse_file
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257
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258 #undef LANG_HOOKS_TYPE_FOR_MODE
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259 #define LANG_HOOKS_TYPE_FOR_MODE jit_langhook_type_for_mode
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260
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261 #undef LANG_HOOKS_BUILTIN_FUNCTION
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262 #define LANG_HOOKS_BUILTIN_FUNCTION jit_langhook_builtin_function
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263
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264 #undef LANG_HOOKS_GLOBAL_BINDINGS_P
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265 #define LANG_HOOKS_GLOBAL_BINDINGS_P jit_langhook_global_bindings_p
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266
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267 #undef LANG_HOOKS_PUSHDECL
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268 #define LANG_HOOKS_PUSHDECL jit_langhook_pushdecl
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269
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270 #undef LANG_HOOKS_GETDECLS
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271 #define LANG_HOOKS_GETDECLS jit_langhook_getdecls
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272
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273 struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
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274
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275 #include "gt-jit-dummy-frontend.h"
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276 #include "gtype-jit.h"
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