1 | /* Structure for saving state for a nested function. |
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2 | Copyright (C) 1989, 92-97, 1998 Free Software Foundation, Inc. |
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3 | |
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4 | This file is part of GNU CC. |
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5 | |
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6 | GNU CC is free software; you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation; either version 2, or (at your option) |
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9 | any later version. |
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10 | |
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11 | GNU CC is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | GNU General Public License 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 GNU CC; see the file COPYING. If not, write to |
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18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
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19 | Boston, MA 02111-1307, USA. */ |
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20 | |
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21 | |
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22 | #ifndef NULL_TREE |
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23 | #define tree int * |
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24 | #endif |
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25 | #ifndef GET_CODE |
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26 | #define rtx int * |
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27 | #endif |
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28 | |
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29 | struct var_refs_queue |
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30 | { |
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31 | rtx modified; |
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32 | enum machine_mode promoted_mode; |
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33 | int unsignedp; |
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34 | struct var_refs_queue *next; |
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35 | }; |
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36 | |
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37 | /* Stack of pending (incomplete) sequences saved by `start_sequence'. |
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38 | Each element describes one pending sequence. |
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39 | The main insn-chain is saved in the last element of the chain, |
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40 | unless the chain is empty. */ |
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41 | |
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42 | struct sequence_stack |
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43 | { |
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44 | /* First and last insns in the chain of the saved sequence. */ |
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45 | rtx first, last; |
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46 | tree sequence_rtl_expr; |
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47 | struct sequence_stack *next; |
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48 | }; |
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49 | |
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50 | extern struct sequence_stack *sequence_stack; |
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51 | |
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52 | /* Stack of single obstacks. */ |
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53 | |
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54 | struct simple_obstack_stack |
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55 | { |
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56 | struct obstack *obstack; |
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57 | struct simple_obstack_stack *next; |
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58 | }; |
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59 | |
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60 | /* This structure can save all the important global and static variables |
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61 | describing the status of the current function. */ |
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62 | |
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63 | struct function |
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64 | { |
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65 | struct function *next; |
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66 | |
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67 | /* For function.c. */ |
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68 | char *name; |
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69 | tree decl; |
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70 | int pops_args; |
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71 | int returns_struct; |
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72 | int returns_pcc_struct; |
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73 | int returns_pointer; |
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74 | int needs_context; |
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75 | int calls_setjmp; |
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76 | int calls_longjmp; |
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77 | int calls_alloca; |
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78 | int has_nonlocal_label; |
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79 | int has_nonlocal_goto; |
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80 | int contains_functions; |
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81 | int is_thunk; |
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82 | rtx nonlocal_goto_handler_slot; |
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83 | rtx nonlocal_goto_stack_level; |
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84 | tree nonlocal_labels; |
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85 | int args_size; |
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86 | int pretend_args_size; |
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87 | rtx arg_offset_rtx; |
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88 | int varargs; |
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89 | int stdarg; |
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90 | int max_parm_reg; |
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91 | rtx *parm_reg_stack_loc; |
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92 | int outgoing_args_size; |
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93 | rtx return_rtx; |
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94 | rtx cleanup_label; |
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95 | rtx return_label; |
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96 | rtx save_expr_regs; |
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97 | rtx stack_slot_list; |
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98 | rtx parm_birth_insn; |
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99 | HOST_WIDE_INT frame_offset; |
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100 | rtx tail_recursion_label; |
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101 | rtx tail_recursion_reentry; |
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102 | rtx internal_arg_pointer; |
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103 | rtx arg_pointer_save_area; |
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104 | tree rtl_expr_chain; |
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105 | rtx last_parm_insn; |
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106 | tree context_display; |
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107 | tree trampoline_list; |
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108 | int function_call_count; |
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109 | struct temp_slot *temp_slots; |
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110 | int temp_slot_level; |
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111 | int target_temp_slot_level; |
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112 | int var_temp_slot_level; |
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113 | /* This slot is initialized as 0 and is added to |
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114 | during the nested function. */ |
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115 | struct var_refs_queue *fixup_var_refs_queue; |
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116 | CUMULATIVE_ARGS args_info; |
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117 | |
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118 | /* For stmt.c */ |
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119 | struct nesting *block_stack; |
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120 | struct nesting *stack_block_stack; |
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121 | struct nesting *cond_stack; |
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122 | struct nesting *loop_stack; |
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123 | struct nesting *case_stack; |
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124 | struct nesting *nesting_stack; |
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125 | int nesting_depth; |
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126 | int block_start_count; |
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127 | tree last_expr_type; |
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128 | rtx last_expr_value; |
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129 | int expr_stmts_for_value; |
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130 | char *emit_filename; |
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131 | int emit_lineno; |
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132 | struct goto_fixup *goto_fixup_chain; |
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133 | |
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134 | /* For exception handling information. */ |
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135 | struct eh_stack ehstack; |
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136 | struct eh_queue ehqueue; |
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137 | rtx catch_clauses; |
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138 | struct label_node *false_label_stack; |
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139 | struct label_node *caught_return_label_stack; |
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140 | tree protect_list; |
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141 | rtx dhc; |
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142 | rtx dcc; |
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143 | |
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144 | /* For expr.c. */ |
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145 | int pending_stack_adjust; |
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146 | int inhibit_defer_pop; |
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147 | rtx saveregs_value; |
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148 | rtx apply_args_value; |
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149 | rtx forced_labels; |
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150 | |
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151 | /* For emit-rtl.c. */ |
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152 | int reg_rtx_no; |
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153 | int first_label_num; |
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154 | rtx first_insn; |
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155 | rtx last_insn; |
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156 | tree sequence_rtl_expr; |
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157 | struct sequence_stack *sequence_stack; |
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158 | int cur_insn_uid; |
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159 | int last_linenum; |
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160 | char *last_filename; |
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161 | char *regno_pointer_flag; |
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162 | char *regno_pointer_align; |
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163 | int regno_pointer_flag_length; |
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164 | rtx *regno_reg_rtx; |
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165 | |
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166 | /* For stor-layout.c. */ |
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167 | tree permanent_type_chain; |
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168 | tree temporary_type_chain; |
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169 | tree permanent_type_end; |
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170 | tree temporary_type_end; |
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171 | tree pending_sizes; |
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172 | int immediate_size_expand; |
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173 | |
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174 | /* For tree.c. */ |
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175 | int all_types_permanent; |
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176 | struct momentary_level *momentary_stack; |
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177 | char *maybepermanent_firstobj; |
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178 | char *temporary_firstobj; |
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179 | char *momentary_firstobj; |
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180 | char *momentary_function_firstobj; |
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181 | struct obstack *current_obstack; |
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182 | struct obstack *function_obstack; |
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183 | struct obstack *function_maybepermanent_obstack; |
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184 | struct obstack *expression_obstack; |
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185 | struct obstack *saveable_obstack; |
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186 | struct obstack *rtl_obstack; |
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187 | struct simple_obstack_stack *inline_obstacks; |
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188 | |
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189 | /* For integrate.c. */ |
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190 | int uses_const_pool; |
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191 | |
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192 | /* For md files. */ |
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193 | int uses_pic_offset_table; |
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194 | /* tm.h can use this to store whatever it likes. */ |
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195 | struct machine_function *machine; |
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196 | |
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197 | /* For reorg. */ |
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198 | rtx epilogue_delay_list; |
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199 | |
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200 | /* For varasm. */ |
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201 | struct constant_descriptor **const_rtx_hash_table; |
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202 | struct pool_sym **const_rtx_sym_hash_table; |
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203 | struct pool_constant *first_pool, *last_pool; |
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204 | int pool_offset; |
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205 | rtx const_double_chain; |
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206 | }; |
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207 | |
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208 | /* The FUNCTION_DECL for an inline function currently being expanded. */ |
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209 | extern tree inline_function_decl; |
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210 | |
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211 | /* Label that will go on function epilogue. |
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212 | Jumping to this label serves as a "return" instruction |
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213 | on machines which require execution of the epilogue on all returns. */ |
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214 | extern rtx return_label; |
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215 | |
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216 | /* List (chain of EXPR_LISTs) of all stack slots in this function. |
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217 | Made for the sake of unshare_all_rtl. */ |
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218 | extern rtx stack_slot_list; |
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219 | |
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220 | /* Given a function decl for a containing function, |
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221 | return the `struct function' for it. */ |
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222 | struct function *find_function_data PROTO((tree)); |
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223 | |
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224 | /* Pointer to chain of `struct function' for containing functions. */ |
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225 | extern struct function *outer_function_chain; |
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226 | |
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227 | /* Put all this function's BLOCK nodes into a vector and return it. |
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228 | Also store in each NOTE for the beginning or end of a block |
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229 | the index of that block in the vector. */ |
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230 | extern tree *identify_blocks PROTO((tree, rtx)); |
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231 | |
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232 | /* Return size needed for stack frame based on slots so far allocated. |
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233 | This size counts from zero. It is not rounded to STACK_BOUNDARY; |
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234 | the caller may have to do that. */ |
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235 | extern HOST_WIDE_INT get_frame_size PROTO((void)); |
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236 | |
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237 | /* These variables hold pointers to functions to |
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238 | save and restore machine-specific data, |
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239 | in push_function_context and pop_function_context. */ |
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240 | extern void (*save_machine_status) PROTO((struct function *)); |
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241 | extern void (*restore_machine_status) PROTO((struct function *)); |
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242 | |
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243 | /* Save and restore status information for a nested function. */ |
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244 | extern void save_tree_status PROTO((struct function *, tree)); |
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245 | extern void restore_tree_status PROTO((struct function *, tree)); |
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246 | extern void save_varasm_status PROTO((struct function *, tree)); |
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247 | extern void restore_varasm_status PROTO((struct function *)); |
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248 | extern void save_eh_status PROTO((struct function *)); |
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249 | extern void restore_eh_status PROTO((struct function *)); |
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250 | extern void save_stmt_status PROTO((struct function *)); |
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251 | extern void restore_stmt_status PROTO((struct function *)); |
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252 | extern void save_expr_status PROTO((struct function *)); |
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253 | extern void restore_expr_status PROTO((struct function *)); |
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254 | extern void save_emit_status PROTO((struct function *)); |
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255 | extern void restore_emit_status PROTO((struct function *)); |
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256 | extern void save_storage_status PROTO((struct function *)); |
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257 | extern void restore_storage_status PROTO((struct function *)); |
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258 | |
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259 | #ifdef rtx |
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260 | #undef rtx |
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261 | #endif |
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262 | |
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263 | #ifdef tree |
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264 | #undef tree |
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265 | #endif |
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