1 /* Structure for saving state for a nested function.
2 Copyright (C) 1989, 1992, 1993, 1994 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
31 enum machine_mode promoted_mode;
33 struct var_refs_queue *next;
36 /* Stack of pending (incomplete) sequences saved by `start_sequence'.
37 Each element describes one pending sequence.
38 The main insn-chain is saved in the last element of the chain,
39 unless the chain is empty. */
43 /* First and last insns in the chain of the saved sequence. */
45 tree sequence_rtl_expr;
46 struct sequence_stack *next;
49 extern struct sequence_stack *sequence_stack;
51 /* Stack of single obstacks. */
53 struct simple_obstack_stack
55 struct obstack *obstack;
56 struct simple_obstack_stack *next;
59 /* This structure can save all the important global and static variables
60 describing the status of the current function. */
64 struct function *next;
71 int returns_pcc_struct;
76 int has_nonlocal_label;
77 int has_nonlocal_goto;
78 int contains_functions;
79 rtx nonlocal_goto_handler_slot;
80 rtx nonlocal_goto_stack_level;
83 int pretend_args_size;
87 rtx *parm_reg_stack_loc;
88 int outgoing_args_size;
96 rtx tail_recursion_label;
97 rtx tail_recursion_reentry;
98 rtx internal_arg_pointer;
99 rtx arg_pointer_save_area;
102 tree context_display;
103 tree trampoline_list;
104 int function_call_count;
105 struct temp_slot *temp_slots;
107 /* This slot is initialized as 0 and is added to
108 during the nested function. */
109 struct var_refs_queue *fixup_var_refs_queue;
112 struct nesting *block_stack;
113 struct nesting *stack_block_stack;
114 struct nesting *cond_stack;
115 struct nesting *loop_stack;
116 struct nesting *case_stack;
117 struct nesting *nesting_stack;
119 int block_start_count;
122 int expr_stmts_for_value;
125 struct goto_fixup *goto_fixup_chain;
128 int pending_stack_adjust;
129 int inhibit_defer_pop;
130 tree cleanups_this_call;
132 rtx apply_args_value;
135 /* For emit-rtl.c. */
140 tree sequence_rtl_expr;
141 struct sequence_stack *sequence_stack;
145 char *regno_pointer_flag;
146 int regno_pointer_flag_length;
149 /* For stor-layout.c. */
150 tree permanent_type_chain;
151 tree temporary_type_chain;
152 tree permanent_type_end;
153 tree temporary_type_end;
155 int immediate_size_expand;
158 int all_types_permanent;
159 struct momentary_level *momentary_stack;
160 char *maybepermanent_firstobj;
161 char *temporary_firstobj;
162 char *momentary_firstobj;
163 char *momentary_function_firstobj;
164 struct obstack *current_obstack;
165 struct obstack *function_obstack;
166 struct obstack *function_maybepermanent_obstack;
167 struct obstack *expression_obstack;
168 struct obstack *saveable_obstack;
169 struct obstack *rtl_obstack;
170 struct simple_obstack_stack *inline_obstacks;
172 /* For integrate.c. */
176 int uses_pic_offset_table;
177 /* tm.h can use this to store whatever it likes. */
178 struct machine_function *machine;
181 rtx epilogue_delay_list;
184 struct constant_descriptor **const_rtx_hash_table;
185 struct pool_sym **const_rtx_sym_hash_table;
186 struct pool_constant *first_pool, *last_pool;
190 /* The FUNCTION_DECL for an inline function currently being expanded. */
191 extern tree inline_function_decl;
193 /* Label that will go on function epilogue.
194 Jumping to this label serves as a "return" instruction
195 on machines which require execution of the epilogue on all returns. */
196 extern rtx return_label;
198 /* List (chain of EXPR_LISTs) of all stack slots in this function.
199 Made for the sake of unshare_all_rtl. */
200 extern rtx stack_slot_list;
202 /* Given a function decl for a containing function,
203 return the `struct function' for it. */
204 struct function *find_function_data PROTO((tree));
206 /* Pointer to chain of `struct function' for containing functions. */
207 extern struct function *outer_function_chain;
209 /* Put all this function's BLOCK nodes into a vector and return it.
210 Also store in each NOTE for the beginning or end of a block
211 the index of that block in the vector. */
212 extern tree *identify_blocks PROTO((tree, rtx));
214 /* These variables hold pointers to functions to
215 save and restore machine-specific data,
216 in push_function_context and pop_function_context. */
217 extern void (*save_machine_status) ();
218 extern void (*restore_machine_status) ();
220 /* Save and restore varasm.c status for a nested function. */
221 extern void save_varasm_status PROTO((struct function *));
222 extern void restore_varasm_status PROTO((struct function *));