annotate gcc/function.h @ 16:04ced10e8804

gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents f6334be47118
children 84e7813d76e9
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1 /* Structure for saving state for a nested function.
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2 Copyright (C) 1989-2017 Free Software Foundation, Inc.
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4 This file is part of GCC.
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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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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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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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20 #ifndef GCC_FUNCTION_H
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21 #define GCC_FUNCTION_H
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24 /* Stack of pending (incomplete) sequences saved by `start_sequence'.
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25 Each element describes one pending sequence.
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26 The main insn-chain is saved in the last element of the chain,
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27 unless the chain is empty. */
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28
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29 struct GTY(()) sequence_stack {
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30 /* First and last insns in the chain of the saved sequence. */
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31 rtx_insn *first;
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32 rtx_insn *last;
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33 struct sequence_stack *next;
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34 };
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35
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36 struct GTY(()) emit_status {
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37 void ensure_regno_capacity ();
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38
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39 /* This is reset to LAST_VIRTUAL_REGISTER + 1 at the start of each function.
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40 After rtl generation, it is 1 plus the largest register number used. */
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41 int x_reg_rtx_no;
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42
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43 /* Lowest label number in current function. */
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44 int x_first_label_num;
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45
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46 /* seq.first and seq.last are the ends of the doubly-linked chain of
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47 rtl for the current function. Both are reset to null at the
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48 start of rtl generation for the function.
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49
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50 start_sequence saves both of these on seq.next and then starts
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51 a new, nested sequence of insns.
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52
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53 seq.next is a stack of pending (incomplete) sequences saved by
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54 start_sequence. Each element describes one pending sequence.
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55 The main insn-chain is the last element of the chain. */
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56 struct sequence_stack seq;
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58 /* INSN_UID for next insn emitted.
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59 Reset to 1 for each function compiled. */
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60 int x_cur_insn_uid;
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61
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62 /* INSN_UID for next debug insn emitted. Only used if
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63 --param min-nondebug-insn-uid=<value> is given with nonzero value. */
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64 int x_cur_debug_insn_uid;
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66 /* The length of the regno_pointer_align, regno_decl, and x_regno_reg_rtx
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67 vectors. Since these vectors are needed during the expansion phase when
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68 the total number of registers in the function is not yet known, the
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69 vectors are copied and made bigger when necessary. */
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70 int regno_pointer_align_length;
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72 /* Indexed by pseudo register number, if nonzero gives the known alignment
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73 for that pseudo (if REG_POINTER is set in x_regno_reg_rtx).
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74 Allocated in parallel with x_regno_reg_rtx. */
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75 unsigned char * GTY((skip)) regno_pointer_align;
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76 };
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78
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79 /* Indexed by register number, gives an rtx for that register (and only
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80 that register). For pseudo registers, it is the unique rtx for
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81 that pseudo. For hard registers, it is an rtx of the mode specified
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82 by reg_raw_mode.
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83
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84 FIXME: We could put it into emit_status struct, but gengtype is not
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85 able to deal with length attribute nested in top level structures. */
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87 extern GTY ((length ("crtl->emit.x_reg_rtx_no"))) rtx * regno_reg_rtx;
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88
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89 /* For backward compatibility... eventually these should all go away. */
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90 #define reg_rtx_no (crtl->emit.x_reg_rtx_no)
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91
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92 #define REGNO_POINTER_ALIGN(REGNO) (crtl->emit.regno_pointer_align[REGNO])
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93
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94 struct GTY(()) expr_status {
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95 /* Number of units that we should eventually pop off the stack.
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96 These are the arguments to function calls that have already returned. */
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97 int x_pending_stack_adjust;
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98
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99 /* Under some ABIs, it is the caller's responsibility to pop arguments
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100 pushed for function calls. A naive implementation would simply pop
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101 the arguments immediately after each call. However, if several
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102 function calls are made in a row, it is typically cheaper to pop
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103 all the arguments after all of the calls are complete since a
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104 single pop instruction can be used. Therefore, GCC attempts to
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105 defer popping the arguments until absolutely necessary. (For
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106 example, at the end of a conditional, the arguments must be popped,
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107 since code outside the conditional won't know whether or not the
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108 arguments need to be popped.)
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109
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110 When INHIBIT_DEFER_POP is nonzero, however, the compiler does not
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111 attempt to defer pops. Instead, the stack is popped immediately
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112 after each call. Rather then setting this variable directly, use
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113 NO_DEFER_POP and OK_DEFER_POP. */
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114 int x_inhibit_defer_pop;
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115
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116 /* If PREFERRED_STACK_BOUNDARY and PUSH_ROUNDING are defined, the stack
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117 boundary can be momentarily unaligned while pushing the arguments.
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118 Record the delta since last aligned boundary here in order to get
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119 stack alignment in the nested function calls working right. */
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120 int x_stack_pointer_delta;
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121
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122 /* Nonzero means __builtin_saveregs has already been done in this function.
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123 The value is the pseudoreg containing the value __builtin_saveregs
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124 returned. */
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125 rtx x_saveregs_value;
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126
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127 /* Similarly for __builtin_apply_args. */
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128 rtx x_apply_args_value;
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129
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130 /* List of labels that must never be deleted. */
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131 vec<rtx_insn *, va_gc> *x_forced_labels;
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132 };
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133
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134 typedef struct call_site_record_d *call_site_record;
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135
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136 /* RTL representation of exception handling. */
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137 struct GTY(()) rtl_eh {
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138 rtx ehr_stackadj;
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139 rtx ehr_handler;
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140 rtx_code_label *ehr_label;
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141
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142 rtx sjlj_fc;
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143 rtx_insn *sjlj_exit_after;
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144
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145 vec<uchar, va_gc> *action_record_data;
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146
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147 vec<call_site_record, va_gc> *call_site_record_v[2];
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148 };
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149
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150 #define pending_stack_adjust (crtl->expr.x_pending_stack_adjust)
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151 #define inhibit_defer_pop (crtl->expr.x_inhibit_defer_pop)
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152 #define saveregs_value (crtl->expr.x_saveregs_value)
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153 #define apply_args_value (crtl->expr.x_apply_args_value)
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154 #define forced_labels (crtl->expr.x_forced_labels)
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155 #define stack_pointer_delta (crtl->expr.x_stack_pointer_delta)
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156
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157 struct gimple_df;
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158 struct call_site_record_d;
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159 struct dw_fde_node;
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160
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161 struct GTY(()) varasm_status {
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162 /* If we're using a per-function constant pool, this is it. */
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163 struct rtx_constant_pool *pool;
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164
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165 /* Number of tree-constants deferred during the expansion of this
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166 function. */
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167 unsigned int deferred_constants;
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168 };
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169
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170
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171 /* Data for function partitioning. */
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172 struct GTY(()) function_subsections {
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173 /* Assembly labels for the hot and cold text sections, to
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174 be used by debugger functions for determining the size of text
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175 sections. */
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176
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177 const char *hot_section_label;
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178 const char *cold_section_label;
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179 const char *hot_section_end_label;
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180 const char *cold_section_end_label;
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181 };
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182
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183 /* Describe an empty area of space in the stack frame. These can be chained
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184 into a list; this is used to keep track of space wasted for alignment
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185 reasons. */
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186 struct GTY(()) frame_space
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187 {
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188 struct frame_space *next;
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189
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190 HOST_WIDE_INT start;
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191 HOST_WIDE_INT length;
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192 };
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193
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194 struct GTY(()) stack_usage
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195 {
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196 /* # of bytes of static stack space allocated by the function. */
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197 HOST_WIDE_INT static_stack_size;
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198
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199 /* # of bytes of dynamic stack space allocated by the function. This is
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200 meaningful only if has_unbounded_dynamic_stack_size is zero. */
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201 HOST_WIDE_INT dynamic_stack_size;
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202
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203 /* # of bytes of space pushed onto the stack after the prologue. If
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204 !ACCUMULATE_OUTGOING_ARGS, it contains the outgoing arguments. */
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205 int pushed_stack_size;
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206
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207 /* Nonzero if the amount of stack space allocated dynamically cannot
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208 be bounded at compile-time. */
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209 unsigned int has_unbounded_dynamic_stack_size : 1;
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210 };
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211
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212 #define current_function_static_stack_size (cfun->su->static_stack_size)
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213 #define current_function_dynamic_stack_size (cfun->su->dynamic_stack_size)
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214 #define current_function_pushed_stack_size (cfun->su->pushed_stack_size)
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215 #define current_function_has_unbounded_dynamic_stack_size \
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216 (cfun->su->has_unbounded_dynamic_stack_size)
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217 #define current_function_allocates_dynamic_stack_space \
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218 (current_function_dynamic_stack_size != 0 \
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219 || current_function_has_unbounded_dynamic_stack_size)
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220
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221 /* This structure can save all the important global and static variables
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222 describing the status of the current function. */
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223
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224 struct GTY(()) function {
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225 struct eh_status *eh;
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226
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227 /* The control flow graph for this function. */
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228 struct control_flow_graph *cfg;
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229
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230 /* GIMPLE body for this function. */
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231 gimple_seq gimple_body;
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232
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233 /* SSA and dataflow information. */
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234 struct gimple_df *gimple_df;
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235
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236 /* The loops in this function. */
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237 struct loops *x_current_loops;
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238
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239 /* Filled by the GIMPLE and RTL FEs, pass to start compilation with. */
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240 char *pass_startwith;
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241
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242 /* The stack usage of this function. */
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243 struct stack_usage *su;
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244
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245 /* Value histograms attached to particular statements. */
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246 htab_t GTY((skip)) value_histograms;
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247
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248 /* For function.c. */
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249
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250 /* Points to the FUNCTION_DECL of this function. */
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251 tree decl;
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252
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253 /* A PARM_DECL that should contain the static chain for this function.
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254 It will be initialized at the beginning of the function. */
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255 tree static_chain_decl;
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256
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257 /* An expression that contains the non-local goto save area. The first
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258 word is the saved frame pointer and the second is the saved stack
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259 pointer. */
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260 tree nonlocal_goto_save_area;
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261
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262 /* Vector of function local variables, functions, types and constants. */
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263 vec<tree, va_gc> *local_decls;
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264
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265 /* In a Cilk function, the VAR_DECL for the frame descriptor. */
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266 tree cilk_frame_decl;
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267
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268 /* For md files. */
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269
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270 /* tm.h can use this to store whatever it likes. */
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271 struct machine_function * GTY ((maybe_undef)) machine;
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272
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273 /* Language-specific code can use this to store whatever it likes. */
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274 struct language_function * language;
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275
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276 /* Used types hash table. */
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277 hash_set<tree> *GTY (()) used_types_hash;
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278
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279 /* Dwarf2 Frame Description Entry, containing the Call Frame Instructions
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280 used for unwinding. Only set when either dwarf2 unwinding or dwarf2
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281 debugging is enabled. */
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282 struct dw_fde_node *fde;
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283
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284 /* Last statement uid. */
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285 int last_stmt_uid;
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286
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287 /* Function sequence number for profiling, debugging, etc. */
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288 int funcdef_no;
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289
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290 /* Line number of the start of the function for debugging purposes. */
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291 location_t function_start_locus;
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292
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293 /* Line number of the end of the function. */
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294 location_t function_end_locus;
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295
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296 /* Properties used by the pass manager. */
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297 unsigned int curr_properties;
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298 unsigned int last_verified;
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299
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300 /* Non-null if the function does something that would prevent it from
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents: 3
diff changeset
301 being copied; this applies to both versioning and inlining. Set to
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents: 3
diff changeset
302 a string describing the reason for failure. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents: 3
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303 const char * GTY((skip)) cannot_be_copied_reason;
0
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304
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305 /* Last assigned dependence info clique. */
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306 unsigned short last_clique;
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307
0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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308 /* Collected bit flags. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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309
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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310 /* Number of units of general registers that need saving in stdarg
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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311 function. What unit is depends on the backend, either it is number
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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312 of bytes, or it can be number of registers. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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313 unsigned int va_list_gpr_size : 8;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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314
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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315 /* Number of units of floating point registers that need saving in stdarg
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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316 function. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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317 unsigned int va_list_fpr_size : 8;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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318
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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319 /* Nonzero if function being compiled can call setjmp. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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320 unsigned int calls_setjmp : 1;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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321
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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322 /* Nonzero if function being compiled can call alloca,
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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323 either as a subroutine or builtin. */
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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324 unsigned int calls_alloca : 1;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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325
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326 /* This will indicate whether a function is a cilk function */
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327 unsigned int is_cilk_function : 1;
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328
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329 /* Nonzero if this is a Cilk function that spawns. */
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330 unsigned int calls_cilk_spawn : 1;
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331
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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332 /* Nonzero if function being compiled receives nonlocal gotos
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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333 from nested functions. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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334 unsigned int has_nonlocal_label : 1;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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335
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336 /* Nonzero if function being compiled has a forced label
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337 placed into static storage. */
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338 unsigned int has_forced_label_in_static : 1;
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339
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parents: 3
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340 /* Nonzero if we've set cannot_be_copied_reason. I.e. if
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents: 3
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341 (cannot_be_copied_set && !cannot_be_copied_reason), the function
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents: 3
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342 can in fact be copied. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents: 3
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343 unsigned int cannot_be_copied_set : 1;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents: 3
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344
0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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345 /* Nonzero if current function uses stdarg.h or equivalent. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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346 unsigned int stdarg : 1;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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347
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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348 unsigned int after_inlining : 1;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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349 unsigned int always_inline_functions_inlined : 1;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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350
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parents: 11
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351 /* Nonzero if function being compiled can throw synchronous non-call
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 11
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352 exceptions. */
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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353 unsigned int can_throw_non_call_exceptions : 1;
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parents: 11
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354
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355 /* Nonzero if instructions that may throw exceptions but don't otherwise
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356 contribute to the execution of the program can be deleted. */
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357 unsigned int can_delete_dead_exceptions : 1;
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358
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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359 /* Fields below this point are not set for abstract functions; see
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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360 allocate_struct_function. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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361
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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362 /* Nonzero if function being compiled needs to be given an address
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
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363 where the value should be stored. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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364 unsigned int returns_struct : 1;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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365
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
366 /* Nonzero if function being compiled needs to
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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367 return the address of where it has put a structure value. */
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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368 unsigned int returns_pcc_struct : 1;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
369
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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370 /* Nonzero if this function has local DECL_HARD_REGISTER variables.
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
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371 In this case code motion has to be done more carefully. */
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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372 unsigned int has_local_explicit_reg_vars : 1;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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373
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
374 /* Nonzero if the current function is a thunk, i.e., a lightweight
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
375 function implemented by the output_mi_thunk hook) that just
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
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376 adjusts one of its arguments and forwards to another
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
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377 function. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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378 unsigned int is_thunk : 1;
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379
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380 /* Nonzero if the current function contains any loops with
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381 loop->force_vectorize set. */
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382 unsigned int has_force_vectorize_loops : 1;
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383
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384 /* Nonzero if the current function contains any loops with
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385 nonzero value in loop->simduid. */
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386 unsigned int has_simduid_loops : 1;
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387
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388 /* Set when the tail call has been identified. */
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389 unsigned int tail_call_marked : 1;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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390 };
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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391
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parents: 11
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392 /* Add the decl D to the local_decls list of FUN. */
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393
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394 void add_local_decl (struct function *fun, tree d);
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parents: 11
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395
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396 #define FOR_EACH_LOCAL_DECL(FUN, I, D) \
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397 FOR_EACH_VEC_SAFE_ELT_REVERSE ((FUN)->local_decls, I, D)
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 11
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398
0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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diff changeset
399 /* If va_list_[gf]pr_size is set to this, it means we don't know how
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
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diff changeset
400 many units need to be saved. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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401 #define VA_LIST_MAX_GPR_SIZE 255
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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diff changeset
402 #define VA_LIST_MAX_FPR_SIZE 255
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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403
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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diff changeset
404 /* The function currently being compiled. */
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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405 extern GTY(()) struct function *cfun;
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
406
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
407 /* In order to ensure that cfun is not set directly, we redefine it so
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
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408 that it is not an lvalue. Rather than assign to cfun, use
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
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409 push_cfun or set_cfun. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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410 #define cfun (cfun + 0)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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411
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
412 /* Nonzero if we've already converted virtual regs to hard regs. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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413 extern int virtuals_instantiated;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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414
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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415 /* Nonzero if at least one trampoline has been created. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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416 extern int trampolines_created;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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417
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418 struct GTY((for_user)) types_used_by_vars_entry {
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419 tree type;
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420 tree var_decl;
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421 };
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422
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423 struct used_type_hasher : ggc_ptr_hash<types_used_by_vars_entry>
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424 {
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425 static hashval_t hash (types_used_by_vars_entry *);
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426 static bool equal (types_used_by_vars_entry *, types_used_by_vars_entry *);
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427 };
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428
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parents: 0
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429 /* Hash table making the relationship between a global variable
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parents: 0
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430 and the types it references in its initializer. The key of the
855418dad1a3 gcc-4.4-20091020
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431 entry is a referenced type, and the value is the DECL of the global
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432 variable. types_use_by_vars_do_hash and types_used_by_vars_eq below are
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433 the hash and equality functions to use for this hash table. */
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434 extern GTY(()) hash_table<used_type_hasher> *types_used_by_vars_hash;
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435
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436 void types_used_by_var_decl_insert (tree type, tree var_decl);
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437
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438 /* During parsing of a global variable, this vector contains the types
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439 referenced by the global variable. */
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440 extern GTY(()) vec<tree, va_gc> *types_used_by_cur_var_decl;
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441
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442
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443 /* Return the loop tree of FN. */
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444
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445 inline struct loops *
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446 loops_for_fn (struct function *fn)
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447 {
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448 return fn->x_current_loops;
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449 }
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450
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451 /* Set the loop tree of FN to LOOPS. */
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452
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453 inline void
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454 set_loops_for_fn (struct function *fn, struct loops *loops)
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455 {
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456 gcc_checking_assert (fn->x_current_loops == NULL || loops == NULL);
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457 fn->x_current_loops = loops;
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458 }
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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459
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
460 /* For backward compatibility... eventually these should all go away. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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461 #define current_function_funcdef_no (cfun->funcdef_no)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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462
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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463 #define current_loops (cfun->x_current_loops)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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464 #define dom_computed (cfun->cfg->x_dom_computed)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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465 #define n_bbs_in_dom_tree (cfun->cfg->x_n_bbs_in_dom_tree)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
466 #define VALUE_HISTOGRAMS(fun) (fun)->value_histograms
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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467
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468 /* A pointer to a function to create target specific, per-function
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469 data structures. */
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470 extern struct machine_function * (*init_machine_status) (void);
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471
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472 /* Structure to record the size of a sequence of arguments
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473 as the sum of a tree-expression and a constant. This structure is
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474 also used to store offsets from the stack, which might be negative,
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475 so the variable part must be ssizetype, not sizetype. */
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476
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477 struct args_size
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478 {
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479 HOST_WIDE_INT constant;
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480 tree var;
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481 };
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482
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parents: 14
diff changeset
483 /* Package up various arg related fields of struct args for
kono
parents: 14
diff changeset
484 locate_and_pad_parm. */
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parents: 14
diff changeset
485 struct locate_and_pad_arg_data
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486 {
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diff changeset
487 /* Size of this argument on the stack, rounded up for any padding it
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parents: 14
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488 gets. If REG_PARM_STACK_SPACE is defined, then register parms are
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parents: 14
diff changeset
489 counted here, otherwise they aren't. */
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diff changeset
490 struct args_size size;
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diff changeset
491 /* Offset of this argument from beginning of stack-args. */
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diff changeset
492 struct args_size offset;
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parents: 14
diff changeset
493 /* Offset to the start of the stack slot. Different from OFFSET
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diff changeset
494 if this arg pads downward. */
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diff changeset
495 struct args_size slot_offset;
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diff changeset
496 /* The amount that the stack pointer needs to be adjusted to
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parents: 14
diff changeset
497 force alignment for the next argument. */
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diff changeset
498 struct args_size alignment_pad;
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diff changeset
499 /* Which way we should pad this arg. */
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500 pad_direction where_pad;
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diff changeset
501 /* slot_offset is at least this aligned. */
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diff changeset
502 unsigned int boundary;
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503 };
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504
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parents: 14
diff changeset
505 /* Add the value of the tree INC to the `struct args_size' TO. */
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506
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507 #define ADD_PARM_SIZE(TO, INC) \
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diff changeset
508 do { \
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509 tree inc = (INC); \
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510 if (tree_fits_shwi_p (inc)) \
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511 (TO).constant += tree_to_shwi (inc); \
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diff changeset
512 else if ((TO).var == 0) \
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513 (TO).var = fold_convert (ssizetype, inc); \
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514 else \
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515 (TO).var = size_binop (PLUS_EXPR, (TO).var, \
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parents: 14
diff changeset
516 fold_convert (ssizetype, inc)); \
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parents: 14
diff changeset
517 } while (0)
0
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
518
16
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parents: 14
diff changeset
519 #define SUB_PARM_SIZE(TO, DEC) \
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diff changeset
520 do { \
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diff changeset
521 tree dec = (DEC); \
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diff changeset
522 if (tree_fits_shwi_p (dec)) \
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523 (TO).constant -= tree_to_shwi (dec); \
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diff changeset
524 else if ((TO).var == 0) \
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525 (TO).var = size_binop (MINUS_EXPR, ssize_int (0), \
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diff changeset
526 fold_convert (ssizetype, dec)); \
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527 else \
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528 (TO).var = size_binop (MINUS_EXPR, (TO).var, \
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529 fold_convert (ssizetype, dec)); \
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diff changeset
530 } while (0)
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531
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parents: 14
diff changeset
532 /* Convert the implicit sum in a `struct args_size' into a tree
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533 of type ssizetype. */
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534 #define ARGS_SIZE_TREE(SIZE) \
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535 ((SIZE).var == 0 ? ssize_int ((SIZE).constant) \
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536 : size_binop (PLUS_EXPR, fold_convert (ssizetype, (SIZE).var), \
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537 ssize_int ((SIZE).constant)))
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538
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parents: 14
diff changeset
539 /* Convert the implicit sum in a `struct args_size' into an rtx. */
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diff changeset
540 #define ARGS_SIZE_RTX(SIZE) \
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diff changeset
541 ((SIZE).var == 0 ? GEN_INT ((SIZE).constant) \
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diff changeset
542 : expand_normal (ARGS_SIZE_TREE (SIZE)))
0
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
543
16
kono
parents: 14
diff changeset
544 #define ASLK_REDUCE_ALIGN 1
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diff changeset
545 #define ASLK_RECORD_PAD 2
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546
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parents: 14
diff changeset
547 /* If pointers to member functions use the least significant bit to
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548 indicate whether a function is virtual, ensure a pointer
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549 to this function will have that bit clear. */
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diff changeset
550 #define MINIMUM_METHOD_BOUNDARY \
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551 ((TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn) \
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552 ? MAX (FUNCTION_BOUNDARY, 2 * BITS_PER_UNIT) : FUNCTION_BOUNDARY)
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553
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554 enum stack_clash_probes {
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555 NO_PROBE_NO_FRAME,
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556 NO_PROBE_SMALL_FRAME,
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557 PROBE_INLINE,
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558 PROBE_LOOP
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559 };
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560
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diff changeset
561 extern void dump_stack_clash_frame_info (enum stack_clash_probes, bool);
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562
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563
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diff changeset
564 extern void push_function_context (void);
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565 extern void pop_function_context (void);
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566
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diff changeset
567 /* Save and restore status information for a nested function. */
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diff changeset
568 extern void free_after_parsing (struct function *);
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diff changeset
569 extern void free_after_compilation (struct function *);
0
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
570
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
571 /* Return size needed for stack frame based on slots so far allocated.
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
572 This size counts from zero. It is not rounded to STACK_BOUNDARY;
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
573 the caller may have to do that. */
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
574 extern HOST_WIDE_INT get_frame_size (void);
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
575
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
576 /* Issue an error message and return TRUE if frame OFFSET overflows in
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
577 the signed target pointer arithmetics for function FUNC. Otherwise
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
578 return FALSE. */
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
579 extern bool frame_offset_overflow (HOST_WIDE_INT, tree);
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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580
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diff changeset
581 extern unsigned int spill_slot_alignment (machine_mode);
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diff changeset
582
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diff changeset
583 extern rtx assign_stack_local_1 (machine_mode, HOST_WIDE_INT, int, int);
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diff changeset
584 extern rtx assign_stack_local (machine_mode, HOST_WIDE_INT, int);
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diff changeset
585 extern rtx assign_stack_temp_for_type (machine_mode, HOST_WIDE_INT, tree);
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diff changeset
586 extern rtx assign_stack_temp (machine_mode, HOST_WIDE_INT);
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diff changeset
587 extern rtx assign_temp (tree, int, int);
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diff changeset
588 extern void update_temp_slot_address (rtx, rtx);
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diff changeset
589 extern void preserve_temp_slots (rtx);
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diff changeset
590 extern void free_temp_slots (void);
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diff changeset
591 extern void push_temp_slots (void);
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diff changeset
592 extern void pop_temp_slots (void);
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diff changeset
593 extern void init_temp_slots (void);
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diff changeset
594 extern rtx get_hard_reg_initial_reg (rtx);
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diff changeset
595 extern rtx get_hard_reg_initial_val (machine_mode, unsigned int);
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diff changeset
596 extern rtx has_hard_reg_initial_val (machine_mode, unsigned int);
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diff changeset
597
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parents: 14
diff changeset
598 /* Called from gimple_expand_cfg. */
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parents: 14
diff changeset
599 extern unsigned int emit_initial_value_sets (void);
0
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
600
16
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diff changeset
601 extern bool initial_value_entry (int i, rtx *, rtx *);
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diff changeset
602 extern void instantiate_decl_rtl (rtx x);
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diff changeset
603 extern int aggregate_value_p (const_tree, const_tree);
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diff changeset
604 extern bool use_register_for_decl (const_tree);
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diff changeset
605 extern gimple_seq gimplify_parameters (void);
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diff changeset
606 extern void locate_and_pad_parm (machine_mode, tree, int, int, int,
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diff changeset
607 tree, struct args_size *,
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diff changeset
608 struct locate_and_pad_arg_data *);
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diff changeset
609 extern void generate_setjmp_warnings (void);
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610
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diff changeset
611 /* Identify BLOCKs referenced by more than one NOTE_INSN_BLOCK_{BEG,END},
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612 and create duplicate blocks. */
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613 extern void reorder_blocks (void);
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diff changeset
614 extern void clear_block_marks (tree);
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diff changeset
615 extern tree blocks_nreverse (tree);
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diff changeset
616 extern tree block_chainon (tree, tree);
0
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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617
16
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parents: 14
diff changeset
618 /* Set BLOCK_NUMBER for all the blocks in FN. */
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diff changeset
619 extern void number_blocks (tree);
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620
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diff changeset
621 /* cfun shouldn't be set directly; use one of these functions instead. */
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622 extern void set_cfun (struct function *new_cfun, bool force = false);
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623 extern void push_cfun (struct function *new_cfun);
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diff changeset
624 extern void pop_cfun (void);
0
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
625
16
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diff changeset
626 extern int get_next_funcdef_no (void);
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diff changeset
627 extern int get_last_funcdef_no (void);
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diff changeset
628 extern void allocate_struct_function (tree, bool);
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diff changeset
629 extern void push_struct_function (tree fndecl);
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diff changeset
630 extern void push_dummy_function (bool);
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diff changeset
631 extern void pop_dummy_function (void);
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diff changeset
632 extern void init_dummy_function_start (void);
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diff changeset
633 extern void init_function_start (tree);
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diff changeset
634 extern void stack_protect_epilogue (void);
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diff changeset
635 extern void expand_function_start (tree);
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diff changeset
636 extern void expand_dummy_function_end (void);
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diff changeset
637
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parents: 14
diff changeset
638 extern void thread_prologue_and_epilogue_insns (void);
0
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
639 extern void diddle_return_value (void (*)(rtx, void*), void*);
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
640 extern void clobber_return_register (void);
16
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parents: 14
diff changeset
641 extern void expand_function_end (void);
0
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
642 extern rtx get_arg_pointer_save_area (void);
16
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diff changeset
643 extern void maybe_copy_prologue_epilogue_insn (rtx, rtx);
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diff changeset
644 extern int prologue_contains (const rtx_insn *);
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diff changeset
645 extern int epilogue_contains (const rtx_insn *);
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diff changeset
646 extern int prologue_epilogue_contains (const rtx_insn *);
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diff changeset
647 extern void record_prologue_seq (rtx_insn *);
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diff changeset
648 extern void record_epilogue_seq (rtx_insn *);
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diff changeset
649 extern void emit_return_into_block (bool simple_p, basic_block bb);
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diff changeset
650 extern void set_return_jump_label (rtx_insn *);
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diff changeset
651 extern bool active_insn_between (rtx_insn *head, rtx_insn *tail);
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diff changeset
652 extern vec<edge> convert_jumps_to_returns (basic_block last_bb, bool simple_p,
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653 vec<edge> unconverted);
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diff changeset
654 extern basic_block emit_return_for_exit (edge exit_fallthru_edge,
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655 bool simple_p);
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diff changeset
656 extern void reposition_prologue_and_epilogue_notes (void);
0
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
657
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
658 /* Returns the name of the current function. */
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diff changeset
659 extern const char *fndecl_name (tree);
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diff changeset
660 extern const char *function_name (struct function *);
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a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
661 extern const char *current_function_name (void);
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
662
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
663 extern void used_types_insert (tree);
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
664
a06113de4d67 first commit
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
665 #endif /* GCC_FUNCTION_H */