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111
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1 /* Definitions for C parsing and type checking.
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145
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2 Copyright (C) 1987-2020 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 #ifndef GCC_C_TREE_H
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21 #define GCC_C_TREE_H
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22
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23 #include "c-family/c-common.h"
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24 #include "diagnostic.h"
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25
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26 /* struct lang_identifier is private to c-decl.c, but langhooks.c needs to
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27 know how big it is. This is sanity-checked in c-decl.c. */
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28 #define C_SIZEOF_STRUCT_LANG_IDENTIFIER \
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29 (sizeof (struct c_common_identifier) + 3 * sizeof (void *))
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30
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31 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */
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32 #define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1 (TYPE)
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33
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34 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */
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35 #define C_TYPE_FIELDS_VOLATILE(TYPE) TREE_LANG_FLAG_2 (TYPE)
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36
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37 /* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE
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38 nonzero if the definition of the type has already started. */
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39 #define C_TYPE_BEING_DEFINED(TYPE) TYPE_LANG_FLAG_0 (TYPE)
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40
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41 /* In an incomplete RECORD_TYPE or UNION_TYPE, a list of variable
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42 declarations whose type would be completed by completing that type. */
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43 #define C_TYPE_INCOMPLETE_VARS(TYPE) TYPE_VFIELD (TYPE)
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44
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45 /* In an IDENTIFIER_NODE, nonzero if this identifier is actually a
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46 keyword. C_RID_CODE (node) is then the RID_* value of the keyword. */
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47 #define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID)
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48
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49 /* Record whether a type or decl was written with nonconstant size.
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50 Note that TYPE_SIZE may have simplified to a constant. */
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51 #define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE)
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52 #define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE)
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53
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54 /* Record whether a type is defined inside a struct or union type.
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55 This is used for -Wc++-compat. */
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56 #define C_TYPE_DEFINED_IN_STRUCT(TYPE) TYPE_LANG_FLAG_2 (TYPE)
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57
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58 /* Record whether a typedef for type `int' was actually `signed int'. */
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59 #define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)
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60
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61 /* For a FUNCTION_DECL, nonzero if it was defined without an explicit
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62 return type. */
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63 #define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP)
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64
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65 /* For a FUNCTION_DECL, nonzero if it was an implicit declaration. */
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66 #define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP)
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67
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68 /* For a PARM_DECL, nonzero if it was declared as an array. */
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69 #define C_ARRAY_PARAMETER(NODE) DECL_LANG_FLAG_0 (NODE)
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70
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71 /* For FUNCTION_DECLs, evaluates true if the decl is built-in but has
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72 been declared. */
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73 #define C_DECL_DECLARED_BUILTIN(EXP) \
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74 DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (EXP))
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75
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76 /* For FUNCTION_DECLs, evaluates true if the decl is built-in, has a
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77 built-in prototype and does not have a non-built-in prototype. */
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78 #define C_DECL_BUILTIN_PROTOTYPE(EXP) \
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79 DECL_LANG_FLAG_6 (FUNCTION_DECL_CHECK (EXP))
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80
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81 /* Record whether a decl was declared register. This is strictly a
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82 front-end flag, whereas DECL_REGISTER is used for code generation;
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83 they may differ for structures with volatile fields. */
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84 #define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_4 (EXP)
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85
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86 /* Record whether a decl was used in an expression anywhere except an
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87 unevaluated operand of sizeof / typeof / alignof. This is only
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88 used for functions declared static but not defined, though outside
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89 sizeof and typeof it is set for other function decls as well. */
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90 #define C_DECL_USED(EXP) DECL_LANG_FLAG_5 (FUNCTION_DECL_CHECK (EXP))
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91
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92 /* Record whether a variable has been declared threadprivate by
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93 #pragma omp threadprivate. */
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94 #define C_DECL_THREADPRIVATE_P(DECL) DECL_LANG_FLAG_3 (VAR_DECL_CHECK (DECL))
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95
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145
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96 /* Set on VAR_DECLs for compound literals. */
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97 #define C_DECL_COMPOUND_LITERAL_P(DECL) \
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98 DECL_LANG_FLAG_5 (VAR_DECL_CHECK (DECL))
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99
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111
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100 /* Nonzero for a decl which either doesn't exist or isn't a prototype.
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101 N.B. Could be simplified if all built-in decls had complete prototypes
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102 (but this is presently difficult because some of them need FILE*). */
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103 #define C_DECL_ISNT_PROTOTYPE(EXP) \
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104 (EXP == 0 \
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105 || (!prototype_p (TREE_TYPE (EXP)) \
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131
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106 && !fndecl_built_in_p (EXP)))
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111
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107
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108 /* For FUNCTION_TYPE, a hidden list of types of arguments. The same as
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109 TYPE_ARG_TYPES for functions with prototypes, but created for functions
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110 without prototypes. */
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111 #define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_LANG_SLOT_1 (NODE)
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112
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113 /* For a CONSTRUCTOR, whether some initializer contains a
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114 subexpression meaning it is not a constant expression. */
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115 #define CONSTRUCTOR_NON_CONST(EXPR) TREE_LANG_FLAG_1 (CONSTRUCTOR_CHECK (EXPR))
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116
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117 /* For a SAVE_EXPR, nonzero if the operand of the SAVE_EXPR has already
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118 been folded. */
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119 #define SAVE_EXPR_FOLDED_P(EXP) TREE_LANG_FLAG_1 (SAVE_EXPR_CHECK (EXP))
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120
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121 /* Record parser information about an expression that is irrelevant
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122 for code generation alongside a tree representing its value. */
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123 struct c_expr
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124 {
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125 /* The value of the expression. */
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126 tree value;
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127 /* Record the original unary/binary operator of an expression, which may
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128 have been changed by fold, STRING_CST for unparenthesized string
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129 constants, C_MAYBE_CONST_EXPR for __builtin_constant_p calls
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130 (even if parenthesized), for subexpressions, and for non-constant
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131 initializers, or ERROR_MARK for other expressions (including
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132 parenthesized expressions). */
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133 enum tree_code original_code;
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134 /* If not NULL, the original type of an expression. This will
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135 differ from the type of the value field for an enum constant.
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136 The type of an enum constant is a plain integer type, but this
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137 field will be the enum type. */
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138 tree original_type;
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139
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140 /* The source range of this expression. This is redundant
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141 for node values that have locations, but not all node kinds
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142 have locations (e.g. constants, and references to params, locals,
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143 etc), so we stash a copy here. */
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144 source_range src_range;
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145
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146 /* Access to the first and last locations within the source spelling
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147 of this expression. */
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148 location_t get_start () const { return src_range.m_start; }
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149 location_t get_finish () const { return src_range.m_finish; }
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150
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151 location_t get_location () const
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152 {
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153 if (EXPR_HAS_LOCATION (value))
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154 return EXPR_LOCATION (value);
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155 else
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156 return make_location (get_start (), get_start (), get_finish ());
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157 }
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158
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159 /* Set the value to error_mark_node whilst ensuring that src_range
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160 is initialized. */
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161 void set_error ()
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162 {
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163 value = error_mark_node;
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164 src_range.m_start = UNKNOWN_LOCATION;
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165 src_range.m_finish = UNKNOWN_LOCATION;
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166 }
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167 };
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168
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169 /* Type alias for struct c_expr. This allows to use the structure
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170 inside the VEC types. */
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171 typedef struct c_expr c_expr_t;
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172
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173 /* A kind of type specifier. Note that this information is currently
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174 only used to distinguish tag definitions, tag references and typeof
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175 uses. */
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176 enum c_typespec_kind {
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177 /* No typespec. This appears only in struct c_declspec. */
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178 ctsk_none,
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179 /* A reserved keyword type specifier. */
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180 ctsk_resword,
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181 /* A reference to a tag, previously declared, such as "struct foo".
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182 This includes where the previous declaration was as a different
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183 kind of tag, in which case this is only valid if shadowing that
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184 tag in an inner scope. */
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185 ctsk_tagref,
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145
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186 /* Likewise, with standard attributes present in the reference. */
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187 ctsk_tagref_attrs,
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111
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188 /* A reference to a tag, not previously declared in a visible
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189 scope. */
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190 ctsk_tagfirstref,
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145
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191 /* Likewise, with standard attributes present in the reference. */
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192 ctsk_tagfirstref_attrs,
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111
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193 /* A definition of a tag such as "struct foo { int a; }". */
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194 ctsk_tagdef,
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195 /* A typedef name. */
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196 ctsk_typedef,
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197 /* An ObjC-specific kind of type specifier. */
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198 ctsk_objc,
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199 /* A typeof specifier, or _Atomic ( type-name ). */
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200 ctsk_typeof
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201 };
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202
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203 /* A type specifier: this structure is created in the parser and
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204 passed to declspecs_add_type only. */
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205 struct c_typespec {
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206 /* What kind of type specifier this is. */
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207 enum c_typespec_kind kind;
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208 /* Whether the expression has operands suitable for use in constant
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209 expressions. */
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210 bool expr_const_operands;
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211 /* The specifier itself. */
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212 tree spec;
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213 /* An expression to be evaluated before the type specifier, in the
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214 case of typeof specifiers, or NULL otherwise or if no such
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215 expression is required for a particular typeof specifier. In
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216 particular, when typeof is applied to an expression of variably
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217 modified type, that expression must be evaluated in order to
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218 determine array sizes that form part of the type, but the
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219 expression itself (as opposed to the array sizes) forms no part
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220 of the type and so needs to be recorded separately. */
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221 tree expr;
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222 };
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223
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224 /* A storage class specifier. */
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225 enum c_storage_class {
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226 csc_none,
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227 csc_auto,
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228 csc_extern,
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229 csc_register,
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230 csc_static,
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231 csc_typedef
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232 };
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233
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234 /* A type specifier keyword "void", "_Bool", "char", "int", "float",
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235 "double", "_Decimal32", "_Decimal64", "_Decimal128", "_Fract", "_Accum",
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236 or none of these. */
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237 enum c_typespec_keyword {
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238 cts_none,
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239 cts_void,
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240 cts_bool,
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241 cts_char,
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242 cts_int,
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243 cts_float,
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244 cts_int_n,
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245 cts_double,
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112
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246 #ifndef noCbC
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247 cts_CbC_code,
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248 #endif
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111
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249 cts_dfloat32,
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250 cts_dfloat64,
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251 cts_dfloat128,
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252 cts_floatn_nx,
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253 cts_fract,
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254 cts_accum,
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255 cts_auto_type
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256 };
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257
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258 /* This enum lists all the possible declarator specifiers, storage
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259 class or attribute that a user can write. There is at least one
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260 enumerator per possible declarator specifier in the struct
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261 c_declspecs below.
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262
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263 It is used to index the array of declspec locations in struct
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264 c_declspecs. */
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265 enum c_declspec_word {
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266 cdw_typespec /* A catch-all for a typespec. */,
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267 cdw_storage_class /* A catch-all for a storage class */,
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268 cdw_attributes,
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269 cdw_typedef,
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270 cdw_explicit_signed,
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271 cdw_deprecated,
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272 cdw_default_int,
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273 cdw_long,
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274 cdw_long_long,
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275 cdw_short,
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276 cdw_signed,
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277 cdw_unsigned,
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278 cdw_complex,
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279 cdw_inline,
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280 cdw_noreturn,
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281 cdw_thread,
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282 cdw_const,
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283 cdw_volatile,
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284 cdw_restrict,
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285 cdw_atomic,
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286 cdw_saturating,
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287 cdw_alignas,
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288 cdw_address_space,
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289 cdw_gimple,
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290 cdw_rtl,
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291 cdw_number_of_elements /* This one must always be the last
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292 enumerator. */
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293 };
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294
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145
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295 enum c_declspec_il {
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296 cdil_none,
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297 cdil_gimple, /* __GIMPLE */
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298 cdil_gimple_cfg, /* __GIMPLE(cfg) */
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299 cdil_gimple_ssa, /* __GIMPLE(ssa) */
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300 cdil_rtl /* __RTL */
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301 };
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302
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111
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303 /* A sequence of declaration specifiers in C. When a new declaration
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304 specifier is added, please update the enum c_declspec_word above
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305 accordingly. */
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306 struct c_declspecs {
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145
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307 location_t locations[cdw_number_of_elements];
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111
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308 /* The type specified, if a single type specifier such as a struct,
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309 union or enum specifier, typedef name or typeof specifies the
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310 whole type, or NULL_TREE if none or a keyword such as "void" or
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311 "char" is used. Does not include qualifiers. */
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312 tree type;
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313 /* Any expression to be evaluated before the type, from a typeof
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314 specifier. */
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315 tree expr;
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316 /* The attributes from a typedef decl. */
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317 tree decl_attr;
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145
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318 /* When parsing, the GNU attributes and prefix standard attributes.
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319 Outside the parser, this will be NULL; attributes (possibly from
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320 multiple lists) will be passed separately. */
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111
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321 tree attrs;
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145
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322 /* When parsing, postfix standard attributes (which appertain to the
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323 type specified by the preceding declaration specifiers, unlike
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324 prefix standard attributes which appertain to the declaration or
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325 declarations as a whole). */
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326 tree postfix_attrs;
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111
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327 /* The pass to start compiling a __GIMPLE or __RTL function with. */
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328 char *gimple_or_rtl_pass;
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145
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329 /* ENTRY BB count. */
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330 profile_count entry_bb_count;
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111
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331 /* The base-2 log of the greatest alignment required by an _Alignas
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332 specifier, in bytes, or -1 if no such specifiers with nonzero
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333 alignment. */
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334 int align_log;
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335 /* For the __intN declspec, this stores the index into the int_n_* arrays. */
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336 int int_n_idx;
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337 /* For the _FloatN and _FloatNx declspec, this stores the index into
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338 the floatn_nx_types array. */
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339 int floatn_nx_idx;
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340 /* The storage class specifier, or csc_none if none. */
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341 enum c_storage_class storage_class;
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342 /* Any type specifier keyword used such as "int", not reflecting
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343 modifiers such as "short", or cts_none if none. */
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344 ENUM_BITFIELD (c_typespec_keyword) typespec_word : 8;
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345 /* The kind of type specifier if one has been seen, ctsk_none
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346 otherwise. */
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145
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347 ENUM_BITFIELD (c_typespec_kind) typespec_kind : 4;
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348 ENUM_BITFIELD (c_declspec_il) declspec_il : 3;
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111
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349 /* Whether any expressions in typeof specifiers may appear in
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350 constant expressions. */
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351 BOOL_BITFIELD expr_const_operands : 1;
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352 /* Whether any declaration specifiers have been seen at all. */
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353 BOOL_BITFIELD declspecs_seen_p : 1;
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145
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354 /* Whether any declaration specifiers other than standard attributes
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355 have been seen at all. If only standard attributes have been
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356 seen, this is an attribute-declaration. */
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357 BOOL_BITFIELD non_std_attrs_seen_p : 1;
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111
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358 /* Whether something other than a storage class specifier or
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359 attribute has been seen. This is used to warn for the
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360 obsolescent usage of storage class specifiers other than at the
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361 start of the list. (Doing this properly would require function
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362 specifiers to be handled separately from storage class
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363 specifiers.) */
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364 BOOL_BITFIELD non_sc_seen_p : 1;
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365 /* Whether the type is specified by a typedef or typeof name. */
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366 BOOL_BITFIELD typedef_p : 1;
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367 /* Whether the type is explicitly "signed" or specified by a typedef
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368 whose type is explicitly "signed". */
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|
|
369 BOOL_BITFIELD explicit_signed_p : 1;
|
|
|
370 /* Whether the specifiers include a deprecated typedef. */
|
|
|
371 BOOL_BITFIELD deprecated_p : 1;
|
|
|
372 /* Whether the type defaulted to "int" because there were no type
|
|
|
373 specifiers. */
|
|
|
374 BOOL_BITFIELD default_int_p : 1;
|
|
|
375 /* Whether "long" was specified. */
|
|
|
376 BOOL_BITFIELD long_p : 1;
|
|
|
377 /* Whether "long" was specified more than once. */
|
|
|
378 BOOL_BITFIELD long_long_p : 1;
|
|
|
379 /* Whether "short" was specified. */
|
|
|
380 BOOL_BITFIELD short_p : 1;
|
|
|
381 /* Whether "signed" was specified. */
|
|
|
382 BOOL_BITFIELD signed_p : 1;
|
|
|
383 /* Whether "unsigned" was specified. */
|
|
|
384 BOOL_BITFIELD unsigned_p : 1;
|
|
|
385 /* Whether "complex" was specified. */
|
|
|
386 BOOL_BITFIELD complex_p : 1;
|
|
|
387 /* Whether "inline" was specified. */
|
|
|
388 BOOL_BITFIELD inline_p : 1;
|
|
|
389 /* Whether "_Noreturn" was speciied. */
|
|
|
390 BOOL_BITFIELD noreturn_p : 1;
|
|
|
391 /* Whether "__thread" or "_Thread_local" was specified. */
|
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392 BOOL_BITFIELD thread_p : 1;
|
|
|
393 /* Whether "__thread" rather than "_Thread_local" was specified. */
|
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|
394 BOOL_BITFIELD thread_gnu_p : 1;
|
|
|
395 /* Whether "const" was specified. */
|
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396 BOOL_BITFIELD const_p : 1;
|
|
|
397 /* Whether "volatile" was specified. */
|
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|
398 BOOL_BITFIELD volatile_p : 1;
|
|
|
399 /* Whether "restrict" was specified. */
|
|
|
400 BOOL_BITFIELD restrict_p : 1;
|
|
|
401 /* Whether "_Atomic" was specified. */
|
|
|
402 BOOL_BITFIELD atomic_p : 1;
|
|
|
403 /* Whether "_Sat" was specified. */
|
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|
404 BOOL_BITFIELD saturating_p : 1;
|
|
|
405 /* Whether any alignment specifier (even with zero alignment) was
|
|
|
406 specified. */
|
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407 BOOL_BITFIELD alignas_p : 1;
|
|
|
408 /* The address space that the declaration belongs to. */
|
|
|
409 addr_space_t address_space;
|
|
|
410 };
|
|
|
411
|
|
|
412 /* The various kinds of declarators in C. */
|
|
|
413 enum c_declarator_kind {
|
|
|
414 /* An identifier. */
|
|
|
415 cdk_id,
|
|
|
416 /* A function. */
|
|
|
417 cdk_function,
|
|
|
418 /* An array. */
|
|
|
419 cdk_array,
|
|
|
420 /* A pointer. */
|
|
|
421 cdk_pointer,
|
|
|
422 /* Parenthesized declarator with nested attributes. */
|
|
|
423 cdk_attrs
|
|
|
424 };
|
|
|
425
|
|
|
426 struct c_arg_tag {
|
|
|
427 /* The argument name. */
|
|
|
428 tree id;
|
|
|
429 /* The type of the argument. */
|
|
|
430 tree type;
|
|
|
431 };
|
|
|
432
|
|
|
433
|
|
|
434 /* Information about the parameters in a function declarator. */
|
|
|
435 struct c_arg_info {
|
|
|
436 /* A list of parameter decls. */
|
|
|
437 tree parms;
|
|
|
438 /* A list of structure, union and enum tags defined. */
|
|
|
439 vec<c_arg_tag, va_gc> *tags;
|
|
|
440 /* A list of argument types to go in the FUNCTION_TYPE. */
|
|
|
441 tree types;
|
|
|
442 /* A list of non-parameter decls (notably enumeration constants)
|
|
|
443 defined with the parameters. */
|
|
|
444 tree others;
|
|
|
445 /* A compound expression of VLA sizes from the parameters, or NULL.
|
|
|
446 In a function definition, these are used to ensure that
|
|
|
447 side-effects in sizes of arrays converted to pointers (such as a
|
|
|
448 parameter int i[n++]) take place; otherwise, they are
|
|
|
449 ignored. */
|
|
|
450 tree pending_sizes;
|
|
|
451 /* True when these arguments had [*]. */
|
|
|
452 BOOL_BITFIELD had_vla_unspec : 1;
|
|
|
453 };
|
|
|
454
|
|
|
455 /* A declarator. */
|
|
|
456 struct c_declarator {
|
|
|
457 /* The kind of declarator. */
|
|
|
458 enum c_declarator_kind kind;
|
|
|
459 location_t id_loc; /* Currently only set for cdk_id, cdk_array. */
|
|
|
460 /* Except for cdk_id, the contained declarator. For cdk_id, NULL. */
|
|
|
461 struct c_declarator *declarator;
|
|
|
462 union {
|
|
145
|
463 /* For identifiers. */
|
|
|
464 struct {
|
|
|
465 /* An IDENTIFIER_NODE, or NULL_TREE if an abstract
|
|
|
466 declarator. */
|
|
|
467 tree id;
|
|
|
468 /* Any attributes (which apply to the declaration rather than to
|
|
|
469 the type described by the outer declarators). */
|
|
|
470 tree attrs;
|
|
|
471 } id;
|
|
111
|
472 /* For functions. */
|
|
|
473 struct c_arg_info *arg_info;
|
|
|
474 /* For arrays. */
|
|
|
475 struct {
|
|
|
476 /* The array dimension, or NULL for [] and [*]. */
|
|
|
477 tree dimen;
|
|
|
478 /* The qualifiers inside []. */
|
|
|
479 int quals;
|
|
|
480 /* The attributes (currently ignored) inside []. */
|
|
|
481 tree attrs;
|
|
|
482 /* Whether [static] was used. */
|
|
|
483 BOOL_BITFIELD static_p : 1;
|
|
|
484 /* Whether [*] was used. */
|
|
|
485 BOOL_BITFIELD vla_unspec_p : 1;
|
|
|
486 } array;
|
|
|
487 /* For pointers, the qualifiers on the pointer type. */
|
|
|
488 int pointer_quals;
|
|
|
489 /* For attributes. */
|
|
|
490 tree attrs;
|
|
|
491 } u;
|
|
|
492 };
|
|
|
493
|
|
|
494 /* A type name. */
|
|
|
495 struct c_type_name {
|
|
|
496 /* The declaration specifiers. */
|
|
|
497 struct c_declspecs *specs;
|
|
|
498 /* The declarator. */
|
|
|
499 struct c_declarator *declarator;
|
|
|
500 };
|
|
|
501
|
|
|
502 /* A parameter. */
|
|
|
503 struct c_parm {
|
|
|
504 /* The declaration specifiers, minus any prefix attributes. */
|
|
|
505 struct c_declspecs *specs;
|
|
|
506 /* The attributes. */
|
|
|
507 tree attrs;
|
|
|
508 /* The declarator. */
|
|
|
509 struct c_declarator *declarator;
|
|
|
510 /* The location of the parameter. */
|
|
|
511 location_t loc;
|
|
|
512 };
|
|
|
513
|
|
|
514 /* Used when parsing an enum. Initialized by start_enum. */
|
|
|
515 struct c_enum_contents
|
|
|
516 {
|
|
|
517 /* While defining an enum type, this is 1 plus the last enumerator
|
|
|
518 constant value. */
|
|
|
519 tree enum_next_value;
|
|
|
520
|
|
|
521 /* Nonzero means that there was overflow computing enum_next_value. */
|
|
|
522 int enum_overflow;
|
|
|
523 };
|
|
|
524
|
|
|
525 /* A type of reference to a static identifier in an inline
|
|
|
526 function. */
|
|
|
527 enum c_inline_static_type {
|
|
|
528 /* Identifier with internal linkage used in function that may be an
|
|
|
529 inline definition (i.e., file-scope static). */
|
|
|
530 csi_internal,
|
|
|
531 /* Modifiable object with static storage duration defined in
|
|
|
532 function that may be an inline definition (i.e., local
|
|
|
533 static). */
|
|
|
534 csi_modifiable
|
|
|
535 };
|
|
|
536
|
|
|
537
|
|
|
538 /* in c-parser.c */
|
|
|
539 extern void c_parse_init (void);
|
|
|
540 extern bool c_keyword_starts_typename (enum rid keyword);
|
|
|
541
|
|
|
542 /* in c-aux-info.c */
|
|
|
543 extern void gen_aux_info_record (tree, int, int, int);
|
|
|
544
|
|
|
545 /* in c-decl.c */
|
|
|
546 struct c_spot_bindings;
|
|
145
|
547 class c_struct_parse_info;
|
|
111
|
548 extern struct obstack parser_obstack;
|
|
|
549 extern tree c_break_label;
|
|
|
550 extern tree c_cont_label;
|
|
|
551
|
|
|
552 extern bool global_bindings_p (void);
|
|
|
553 extern tree pushdecl (tree);
|
|
|
554 extern void push_scope (void);
|
|
|
555 extern tree pop_scope (void);
|
|
|
556 extern void c_bindings_start_stmt_expr (struct c_spot_bindings *);
|
|
|
557 extern void c_bindings_end_stmt_expr (struct c_spot_bindings *);
|
|
|
558
|
|
|
559 extern void record_inline_static (location_t, tree, tree,
|
|
|
560 enum c_inline_static_type);
|
|
|
561 extern void c_init_decl_processing (void);
|
|
|
562 extern void c_print_identifier (FILE *, tree, int);
|
|
|
563 extern int quals_from_declspecs (const struct c_declspecs *);
|
|
|
564 extern struct c_declarator *build_array_declarator (location_t, tree,
|
|
|
565 struct c_declspecs *,
|
|
|
566 bool, bool);
|
|
|
567 extern tree build_enumerator (location_t, location_t, struct c_enum_contents *,
|
|
|
568 tree, tree);
|
|
|
569 extern tree check_for_loop_decls (location_t, bool);
|
|
|
570 extern void mark_forward_parm_decls (void);
|
|
|
571 extern void declare_parm_level (void);
|
|
|
572 extern void undeclared_variable (location_t, tree);
|
|
|
573 extern tree lookup_label_for_goto (location_t, tree);
|
|
|
574 extern tree declare_label (tree);
|
|
|
575 extern tree define_label (location_t, tree);
|
|
|
576 extern struct c_spot_bindings *c_get_switch_bindings (void);
|
|
|
577 extern void c_release_switch_bindings (struct c_spot_bindings *);
|
|
|
578 extern bool c_check_switch_jump_warnings (struct c_spot_bindings *,
|
|
|
579 location_t, location_t);
|
|
|
580 extern void finish_decl (tree, location_t, tree, tree, tree);
|
|
|
581 extern tree finish_enum (tree, tree, tree);
|
|
|
582 extern void finish_function (void);
|
|
|
583 extern tree finish_struct (location_t, tree, tree, tree,
|
|
145
|
584 class c_struct_parse_info *);
|
|
|
585 extern tree c_simulate_enum_decl (location_t, const char *,
|
|
|
586 vec<string_int_pair>);
|
|
111
|
587 extern struct c_arg_info *build_arg_info (void);
|
|
|
588 extern struct c_arg_info *get_parm_info (bool, tree);
|
|
|
589 extern tree grokfield (location_t, struct c_declarator *,
|
|
|
590 struct c_declspecs *, tree, tree *);
|
|
|
591 extern tree groktypename (struct c_type_name *, tree *, bool *);
|
|
|
592 extern tree grokparm (const struct c_parm *, tree *);
|
|
112
|
593 #ifndef noCbC
|
|
|
594 extern tree implicitly_declare (location_t, tree, int);
|
|
|
595 #else
|
|
111
|
596 extern tree implicitly_declare (location_t, tree);
|
|
112
|
597 #endif
|
|
111
|
598 extern void keep_next_level (void);
|
|
|
599 extern void pending_xref_error (void);
|
|
|
600 extern void c_push_function_context (void);
|
|
|
601 extern void c_pop_function_context (void);
|
|
|
602 extern void push_parm_decl (const struct c_parm *, tree *);
|
|
|
603 extern struct c_declarator *set_array_declarator_inner (struct c_declarator *,
|
|
|
604 struct c_declarator *);
|
|
|
605 extern tree c_builtin_function (tree);
|
|
|
606 extern tree c_builtin_function_ext_scope (tree);
|
|
145
|
607 extern tree c_simulate_builtin_function_decl (tree);
|
|
|
608 extern void c_warn_unused_attributes (tree);
|
|
|
609 extern tree c_warn_type_attributes (tree);
|
|
111
|
610 extern void shadow_tag (const struct c_declspecs *);
|
|
|
611 extern void shadow_tag_warned (const struct c_declspecs *, int);
|
|
|
612 extern tree start_enum (location_t, struct c_enum_contents *, tree);
|
|
|
613 extern bool start_function (struct c_declspecs *, struct c_declarator *, tree);
|
|
|
614 extern tree start_decl (struct c_declarator *, struct c_declspecs *, bool,
|
|
|
615 tree);
|
|
|
616 extern tree start_struct (location_t, enum tree_code, tree,
|
|
145
|
617 class c_struct_parse_info **);
|
|
111
|
618 extern void store_parm_decls (void);
|
|
|
619 extern void store_parm_decls_from (struct c_arg_info *);
|
|
|
620 extern void temp_store_parm_decls (tree, tree);
|
|
|
621 extern void temp_pop_parm_decls (void);
|
|
|
622 extern tree xref_tag (enum tree_code, tree);
|
|
145
|
623 extern struct c_typespec parser_xref_tag (location_t, enum tree_code, tree,
|
|
|
624 bool, tree);
|
|
111
|
625 extern struct c_parm *build_c_parm (struct c_declspecs *, tree,
|
|
|
626 struct c_declarator *, location_t);
|
|
|
627 extern struct c_declarator *build_attrs_declarator (tree,
|
|
|
628 struct c_declarator *);
|
|
|
629 extern struct c_declarator *build_function_declarator (struct c_arg_info *,
|
|
|
630 struct c_declarator *);
|
|
|
631 extern struct c_declarator *build_id_declarator (tree);
|
|
|
632 extern struct c_declarator *make_pointer_declarator (struct c_declspecs *,
|
|
|
633 struct c_declarator *);
|
|
|
634 extern struct c_declspecs *build_null_declspecs (void);
|
|
145
|
635 extern struct c_declspecs *declspecs_add_qual (location_t,
|
|
111
|
636 struct c_declspecs *, tree);
|
|
|
637 extern struct c_declspecs *declspecs_add_type (location_t,
|
|
|
638 struct c_declspecs *,
|
|
|
639 struct c_typespec);
|
|
145
|
640 extern struct c_declspecs *declspecs_add_scspec (location_t,
|
|
111
|
641 struct c_declspecs *, tree);
|
|
145
|
642 extern struct c_declspecs *declspecs_add_attrs (location_t,
|
|
111
|
643 struct c_declspecs *, tree);
|
|
145
|
644 extern struct c_declspecs *declspecs_add_addrspace (location_t,
|
|
111
|
645 struct c_declspecs *,
|
|
|
646 addr_space_t);
|
|
145
|
647 extern struct c_declspecs *declspecs_add_alignas (location_t,
|
|
111
|
648 struct c_declspecs *, tree);
|
|
|
649 extern struct c_declspecs *finish_declspecs (struct c_declspecs *);
|
|
|
650
|
|
|
651 /* in c-objc-common.c */
|
|
|
652 extern bool c_objc_common_init (void);
|
|
|
653 extern bool c_missing_noreturn_ok_p (tree);
|
|
|
654 extern bool c_warn_unused_global_decl (const_tree);
|
|
|
655 extern void c_initialize_diagnostics (diagnostic_context *);
|
|
|
656 extern bool c_vla_unspec_p (tree x, tree fn);
|
|
145
|
657 extern alias_set_type c_get_alias_set (tree);
|
|
111
|
658
|
|
|
659 /* in c-typeck.c */
|
|
|
660 extern int in_alignof;
|
|
|
661 extern int in_sizeof;
|
|
|
662 extern int in_typeof;
|
|
|
663
|
|
|
664 extern tree c_last_sizeof_arg;
|
|
|
665 extern location_t c_last_sizeof_loc;
|
|
|
666
|
|
|
667 extern struct c_switch *c_switch_stack;
|
|
|
668
|
|
|
669 extern tree c_objc_common_truthvalue_conversion (location_t, tree);
|
|
|
670 extern tree require_complete_type (location_t, tree);
|
|
|
671 extern bool same_translation_unit_p (const_tree, const_tree);
|
|
|
672 extern int comptypes (tree, tree);
|
|
|
673 extern int comptypes_check_different_types (tree, tree, bool *);
|
|
|
674 extern bool c_vla_type_p (const_tree);
|
|
|
675 extern bool c_mark_addressable (tree, bool = false);
|
|
|
676 extern void c_incomplete_type_error (location_t, const_tree, const_tree);
|
|
|
677 extern tree c_type_promotes_to (tree);
|
|
|
678 extern struct c_expr default_function_array_conversion (location_t,
|
|
|
679 struct c_expr);
|
|
|
680 extern struct c_expr default_function_array_read_conversion (location_t,
|
|
|
681 struct c_expr);
|
|
|
682 extern struct c_expr convert_lvalue_to_rvalue (location_t, struct c_expr,
|
|
|
683 bool, bool);
|
|
131
|
684 extern tree decl_constant_value_1 (tree, bool);
|
|
111
|
685 extern void mark_exp_read (tree);
|
|
|
686 extern tree composite_type (tree, tree);
|
|
|
687 extern tree build_component_ref (location_t, tree, tree, location_t);
|
|
|
688 extern tree build_array_ref (location_t, tree, tree);
|
|
|
689 extern tree build_external_ref (location_t, tree, bool, tree *);
|
|
|
690 extern void pop_maybe_used (bool);
|
|
|
691 extern struct c_expr c_expr_sizeof_expr (location_t, struct c_expr);
|
|
|
692 extern struct c_expr c_expr_sizeof_type (location_t, struct c_type_name *);
|
|
|
693 extern struct c_expr parser_build_unary_op (location_t, enum tree_code,
|
|
|
694 struct c_expr);
|
|
|
695 extern struct c_expr parser_build_binary_op (location_t,
|
|
|
696 enum tree_code, struct c_expr,
|
|
|
697 struct c_expr);
|
|
|
698 extern tree build_conditional_expr (location_t, tree, bool, tree, tree,
|
|
|
699 location_t, tree, tree, location_t);
|
|
|
700 extern tree build_compound_expr (location_t, tree, tree);
|
|
|
701 extern tree c_cast_expr (location_t, struct c_type_name *, tree);
|
|
|
702 extern tree build_c_cast (location_t, tree, tree);
|
|
|
703 extern void store_init_value (location_t, tree, tree, tree);
|
|
|
704 extern void maybe_warn_string_init (location_t, tree, struct c_expr);
|
|
|
705 extern void start_init (tree, tree, int, rich_location *);
|
|
|
706 extern void finish_init (void);
|
|
|
707 extern void really_start_incremental_init (tree);
|
|
|
708 extern void finish_implicit_inits (location_t, struct obstack *);
|
|
|
709 extern void push_init_level (location_t, int, struct obstack *);
|
|
|
710 extern struct c_expr pop_init_level (location_t, int, struct obstack *,
|
|
|
711 location_t);
|
|
|
712 extern void set_init_index (location_t, tree, tree, struct obstack *);
|
|
|
713 extern void set_init_label (location_t, tree, location_t, struct obstack *);
|
|
|
714 extern void process_init_element (location_t, struct c_expr, bool,
|
|
|
715 struct obstack *);
|
|
131
|
716 extern tree build_compound_literal (location_t, tree, tree, bool,
|
|
|
717 unsigned int);
|
|
111
|
718 extern void check_compound_literal_type (location_t, struct c_type_name *);
|
|
|
719 extern tree c_start_case (location_t, location_t, tree, bool);
|
|
|
720 extern void c_finish_case (tree, tree);
|
|
145
|
721 extern tree build_asm_expr (location_t, tree, tree, tree, tree, tree, bool,
|
|
|
722 bool);
|
|
|
723 extern tree build_asm_stmt (bool, tree);
|
|
111
|
724 extern int c_types_compatible_p (tree, tree);
|
|
|
725 extern tree c_begin_compound_stmt (bool);
|
|
|
726 extern tree c_end_compound_stmt (location_t, tree, bool);
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727 extern void c_finish_if_stmt (location_t, tree, tree, tree);
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145
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728 extern void c_finish_loop (location_t, location_t, tree, location_t, tree,
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729 tree, tree, tree, bool);
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111
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730 extern tree c_begin_stmt_expr (void);
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731 extern tree c_finish_stmt_expr (location_t, tree);
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732 extern tree c_process_expr_stmt (location_t, tree);
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733 extern tree c_finish_expr_stmt (location_t, tree);
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734 extern tree c_finish_return (location_t, tree, tree);
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735 extern tree c_finish_bc_stmt (location_t, tree *, bool);
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736 extern tree c_finish_goto_label (location_t, tree);
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737 extern tree c_finish_goto_ptr (location_t, tree);
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738 extern tree c_expr_to_decl (tree, bool *, bool *);
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739 extern tree c_finish_omp_construct (location_t, enum tree_code, tree, tree);
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740 extern tree c_finish_oacc_data (location_t, tree, tree);
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741 extern tree c_finish_oacc_host_data (location_t, tree, tree);
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742 extern tree c_begin_omp_parallel (void);
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743 extern tree c_finish_omp_parallel (location_t, tree, tree);
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744 extern tree c_begin_omp_task (void);
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745 extern tree c_finish_omp_task (location_t, tree, tree);
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746 extern void c_finish_omp_cancel (location_t, tree);
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747 extern void c_finish_omp_cancellation_point (location_t, tree);
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748 extern tree c_finish_omp_clauses (tree, enum c_omp_region_type);
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749 extern tree c_build_va_arg (location_t, tree, location_t, tree);
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750 extern tree c_finish_transaction (location_t, tree, int);
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751 extern bool c_tree_equal (tree, tree);
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752 extern tree c_build_function_call_vec (location_t, vec<location_t>, tree,
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753 vec<tree, va_gc> *, vec<tree, va_gc> *);
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754 extern tree c_omp_clause_copy_ctor (tree, tree, tree);
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755
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756 /* Set to 0 at beginning of a function definition, set to 1 if
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757 a return statement that specifies a return value is seen. */
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758
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759 extern int current_function_returns_value;
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760
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761 /* Set to 0 at beginning of a function definition, set to 1 if
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762 a return statement with no argument is seen. */
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763
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764 extern int current_function_returns_null;
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765
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766 /* Set to 0 at beginning of a function definition, set to 1 if
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767 a call to a noreturn function is seen. */
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768
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769 extern int current_function_returns_abnormally;
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770
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771 /* In c-decl.c */
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772
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773 /* Tell the binding oracle what kind of binding we are looking for. */
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774
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|
|
775 enum c_oracle_request
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776 {
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777 C_ORACLE_SYMBOL,
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778 C_ORACLE_TAG,
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|
|
779 C_ORACLE_LABEL
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|
780 };
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|
|
781
|
|
|
782 /* If this is non-NULL, then it is a "binding oracle" which can lazily
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|
|
783 create bindings when needed by the C compiler. The oracle is told
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|
|
784 the name and type of the binding to create. It can call pushdecl
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|
785 or the like to ensure the binding is visible; or do nothing,
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|
|
786 leaving the binding untouched. c-decl.c takes note of when the
|
|
|
787 oracle has been called and will not call it again if it fails to
|
|
|
788 create a given binding. */
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|
|
789
|
|
|
790 typedef void c_binding_oracle_function (enum c_oracle_request, tree identifier);
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|
|
791
|
|
|
792 extern c_binding_oracle_function *c_binding_oracle;
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|
|
793
|
|
|
794 extern void c_finish_incomplete_decl (tree);
|
|
|
795 extern tree c_omp_reduction_id (enum tree_code, tree);
|
|
|
796 extern tree c_omp_reduction_decl (tree);
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|
|
797 extern tree c_omp_reduction_lookup (tree, tree);
|
|
|
798 extern tree c_check_omp_declare_reduction_r (tree *, int *, void *);
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|
|
799 extern void c_pushtag (location_t, tree, tree);
|
|
|
800 extern void c_bind (location_t, tree, bool);
|
|
|
801 extern bool tag_exists_p (enum tree_code, tree);
|
|
|
802
|
|
|
803 /* In c-errors.c */
|
|
|
804 extern bool pedwarn_c90 (location_t, int opt, const char *, ...)
|
|
|
805 ATTRIBUTE_GCC_DIAG(3,4);
|
|
|
806 extern bool pedwarn_c99 (location_t, int opt, const char *, ...)
|
|
|
807 ATTRIBUTE_GCC_DIAG(3,4);
|
|
131
|
808 extern bool pedwarn_c11 (location_t, int opt, const char *, ...)
|
|
|
809 ATTRIBUTE_GCC_DIAG(3,4);
|
|
111
|
810
|
|
|
811 extern void
|
|
|
812 set_c_expr_source_range (c_expr *expr,
|
|
|
813 location_t start, location_t finish);
|
|
|
814
|
|
|
815 extern void
|
|
|
816 set_c_expr_source_range (c_expr *expr,
|
|
|
817 source_range src_range);
|
|
|
818
|
|
|
819 /* In c-fold.c */
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|
|
820 extern vec<tree> incomplete_record_decls;
|
|
|
821
|
|
|
822 #if CHECKING_P
|
|
|
823 namespace selftest {
|
|
|
824 extern void run_c_tests (void);
|
|
|
825 } // namespace selftest
|
|
|
826 #endif /* #if CHECKING_P */
|
|
|
827
|
|
|
828
|
|
|
829 #endif /* ! GCC_C_TREE_H */
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