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131
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1 /* { dg-options "-O" } */
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2
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3 #include "gcc-plugin.h"
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4 #include "config.h"
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5 #include "system.h"
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6 #include "coretypes.h"
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7 #include "tm.h"
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8 #include "tree.h"
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9 #include "stringpool.h"
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10 #include "toplev.h"
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11 #include "basic-block.h"
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12 #include "hash-table.h"
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13 #include "vec.h"
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14 #include "ggc.h"
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15 #include "basic-block.h"
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16 #include "tree-ssa-alias.h"
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17 #include "internal-fn.h"
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18 #include "gimple-fold.h"
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19 #include "tree-eh.h"
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20 #include "gimple-expr.h"
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21 #include "is-a.h"
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22 #include "gimple.h"
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23 #include "gimple-iterator.h"
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24 #include "tree.h"
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25 #include "tree-pass.h"
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26 #include "intl.h"
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27 #include "plugin-version.h"
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28 #include "c-family/c-common.h"
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29 #include "diagnostic.h"
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30 #include "context.h"
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31 #include "print-tree.h"
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32 #include "cpplib.h"
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33 #include "c-family/c-pragma.h"
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34 #include "substring-locations.h"
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35
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36 int plugin_is_GPL_compatible;
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37
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38 /* A custom pass for emitting dummy warnings from the middle-end. */
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39
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40 const pass_data pass_data_test_inlining =
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41 {
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42 GIMPLE_PASS, /* type */
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43 "test_inlining", /* name */
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44 OPTGROUP_NONE, /* optinfo_flags */
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45 TV_NONE, /* tv_id */
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46 PROP_ssa, /* properties_required */
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47 0, /* properties_provided */
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48 0, /* properties_destroyed */
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49 0, /* todo_flags_start */
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50 0, /* todo_flags_finish */
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51 };
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52
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53 class pass_test_inlining : public gimple_opt_pass
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54 {
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55 public:
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56 pass_test_inlining(gcc::context *ctxt)
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57 : gimple_opt_pass(pass_data_test_inlining, ctxt)
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58 {}
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59
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60 /* opt_pass methods: */
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61 bool gate (function *) { return true; }
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62 virtual unsigned int execute (function *);
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63
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64 }; // class pass_test_inlining
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65
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66 /* Determine if STMT is a call with NUM_ARGS arguments to a function
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67 named FUNCNAME.
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68 If so, return STMT as a gcall *. Otherwise return NULL. */
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69
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70 static gcall *
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71 check_for_named_call (gimple *stmt,
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72 const char *funcname, unsigned int num_args)
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73 {
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74 gcc_assert (funcname);
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75
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76 gcall *call = dyn_cast <gcall *> (stmt);
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77 if (!call)
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78 return NULL;
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79
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80 tree fndecl = gimple_call_fndecl (call);
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81 if (!fndecl)
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82 return NULL;
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83
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84 if (strcmp (IDENTIFIER_POINTER (DECL_NAME (fndecl)), funcname))
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85 return NULL;
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86
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87 if (gimple_call_num_args (call) != num_args)
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88 {
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89 error_at (stmt->location, "expected number of args: %i (got %i)",
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90 num_args, gimple_call_num_args (call));
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91 return NULL;
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92 }
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93
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94 return call;
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95 }
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96
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97 /* Emit a warning at LOC. */
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98
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99 static void
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100 emit_warning (location_t loc)
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101 {
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102 source_range src_range = get_range_from_loc (line_table, loc);
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103 warning_at (loc, 0, "range %i:%i-%i:%i",
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104 LOCATION_LINE (src_range.m_start),
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105 LOCATION_COLUMN (src_range.m_start),
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106 LOCATION_LINE (src_range.m_finish),
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107 LOCATION_COLUMN (src_range.m_finish));
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108 }
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109
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110 /* Code for simulating the emission of a warning from the middle-end.
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111 Emit a warning for each call to a function named "__emit_warning". */
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112
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113 static void
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114 test_inlining (gimple *stmt)
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115 {
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116 gcall *call = check_for_named_call (stmt, "__emit_warning", 1);
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117 if (!call)
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118 return;
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119
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120 /* We expect an ADDR_EXPR with a STRING_CST inside it for the
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121 initial arg. */
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122 tree t_addr_string = gimple_call_arg (call, 0);
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123 if (TREE_CODE (t_addr_string) != ADDR_EXPR)
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124 {
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125 error_at (call->location, "string literal required for arg 1");
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126 return;
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127 }
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128
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129 tree t_string = TREE_OPERAND (t_addr_string, 0);
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130 if (TREE_CODE (t_string) != STRING_CST)
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131 {
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132 error_at (call->location, "string literal required for arg 1");
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133 return;
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134 }
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135
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136 warning_at (call->location, 0, "%G%s", call,
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137 TREE_STRING_POINTER (t_string));
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138 }
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139
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140 /* Call test_inlining on every statement within FUN. */
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141
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142 unsigned int
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143 pass_test_inlining::execute (function *fun)
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144 {
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145 gimple_stmt_iterator gsi;
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146 basic_block bb;
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147
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148 FOR_EACH_BB_FN (bb, fun)
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149 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
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150 {
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151 gimple *stmt = gsi_stmt (gsi);
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152 test_inlining (stmt);
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153 }
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154
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155 return 0;
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156 }
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157
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158 /* Entrypoint for the plugin. Create and register the custom pass. */
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159
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160 int
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161 plugin_init (struct plugin_name_args *plugin_info,
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162 struct plugin_gcc_version *version)
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163 {
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164 struct register_pass_info pass_info;
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165 const char *plugin_name = plugin_info->base_name;
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166 int argc = plugin_info->argc;
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167 struct plugin_argument *argv = plugin_info->argv;
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168
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169 if (!plugin_default_version_check (version, &gcc_version))
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170 return 1;
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171
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172 pass_info.pass = new pass_test_inlining (g);
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173 pass_info.reference_pass_name = "*warn_function_noreturn";
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174 pass_info.ref_pass_instance_number = 1;
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175 pass_info.pos_op = PASS_POS_INSERT_AFTER;
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176 register_callback (plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL,
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177 &pass_info);
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178
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179 return 0;
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180 }
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