1 /* Structure for saving state for a nested function.
2 Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
32 enum machine_mode promoted_mode;
34 struct var_refs_queue *next;
37 /* Stack of pending (incomplete) sequences saved by `start_sequence'.
38 Each element describes one pending sequence.
39 The main insn-chain is saved in the last element of the chain,
40 unless the chain is empty. */
44 /* First and last insns in the chain of the saved sequence. */
46 tree sequence_rtl_expr;
47 struct sequence_stack *next;
50 extern struct sequence_stack *sequence_stack;
52 /* Stack of single obstacks. */
54 struct simple_obstack_stack
56 struct obstack *obstack;
57 struct simple_obstack_stack *next;
60 /* This structure can save all the important global and static variables
61 describing the status of the current function. */
65 struct function *next;
72 int returns_pcc_struct;
77 int has_nonlocal_label;
78 int has_nonlocal_goto;
79 int contains_functions;
80 rtx nonlocal_goto_handler_slot;
81 rtx nonlocal_goto_stack_level;
84 int pretend_args_size;
89 rtx *parm_reg_stack_loc;
90 int outgoing_args_size;
98 rtx tail_recursion_label;
99 rtx tail_recursion_reentry;
100 rtx internal_arg_pointer;
101 rtx arg_pointer_save_area;
104 tree context_display;
105 tree trampoline_list;
106 int function_call_count;
107 struct temp_slot *temp_slots;
109 /* This slot is initialized as 0 and is added to
110 during the nested function. */
111 struct var_refs_queue *fixup_var_refs_queue;
114 struct nesting *block_stack;
115 struct nesting *stack_block_stack;
116 struct nesting *cond_stack;
117 struct nesting *loop_stack;
118 struct nesting *case_stack;
119 struct nesting *nesting_stack;
121 int block_start_count;
124 int expr_stmts_for_value;
127 struct goto_fixup *goto_fixup_chain;
130 int pending_stack_adjust;
131 int inhibit_defer_pop;
132 tree cleanups_this_call;
134 rtx apply_args_value;
137 /* For emit-rtl.c. */
142 tree sequence_rtl_expr;
143 struct sequence_stack *sequence_stack;
147 char *regno_pointer_flag;
148 int regno_pointer_flag_length;
151 /* For stor-layout.c. */
152 tree permanent_type_chain;
153 tree temporary_type_chain;
154 tree permanent_type_end;
155 tree temporary_type_end;
157 int immediate_size_expand;
160 int all_types_permanent;
161 struct momentary_level *momentary_stack;
162 char *maybepermanent_firstobj;
163 char *temporary_firstobj;
164 char *momentary_firstobj;
165 char *momentary_function_firstobj;
166 struct obstack *current_obstack;
167 struct obstack *function_obstack;
168 struct obstack *function_maybepermanent_obstack;
169 struct obstack *expression_obstack;
170 struct obstack *saveable_obstack;
171 struct obstack *rtl_obstack;
172 struct simple_obstack_stack *inline_obstacks;
174 /* For integrate.c. */
178 int uses_pic_offset_table;
179 /* tm.h can use this to store whatever it likes. */
180 struct machine_function *machine;
183 rtx epilogue_delay_list;
186 struct constant_descriptor **const_rtx_hash_table;
187 struct pool_sym **const_rtx_sym_hash_table;
188 struct pool_constant *first_pool, *last_pool;
192 /* The FUNCTION_DECL for an inline function currently being expanded. */
193 extern tree inline_function_decl;
195 /* Label that will go on function epilogue.
196 Jumping to this label serves as a "return" instruction
197 on machines which require execution of the epilogue on all returns. */
198 extern rtx return_label;
200 /* List (chain of EXPR_LISTs) of all stack slots in this function.
201 Made for the sake of unshare_all_rtl. */
202 extern rtx stack_slot_list;
204 /* Given a function decl for a containing function,
205 return the `struct function' for it. */
206 struct function *find_function_data PROTO((tree));
208 /* Pointer to chain of `struct function' for containing functions. */
209 extern struct function *outer_function_chain;
211 /* Put all this function's BLOCK nodes into a vector and return it.
212 Also store in each NOTE for the beginning or end of a block
213 the index of that block in the vector. */
214 extern tree *identify_blocks PROTO((tree, rtx));
216 /* These variables hold pointers to functions to
217 save and restore machine-specific data,
218 in push_function_context and pop_function_context. */
219 extern void (*save_machine_status) ();
220 extern void (*restore_machine_status) ();
222 /* Save and restore varasm.c status for a nested function. */
223 extern void save_varasm_status PROTO((struct function *));
224 extern void restore_varasm_status PROTO((struct function *));