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1.1 root 1: /* Structure for saving state for a nested function.
2: Copyright (C) 1989 Free Software Foundation, Inc.
3:
4: This file is part of GNU CC.
5:
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)
9: any later version.
10:
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.
15:
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. */
19:
20:
21: #ifndef NULL_TREE
22: #define tree int *
23: #endif
24: #ifndef GET_CODE
25: #define rtx int *
26: #endif
27:
28: struct var_refs_queue
29: {
30: rtx modified;
31: rtx original;
32: struct var_refs_queue *next;
33: };
34:
35: /* Stack of pending (incomplete) sequences saved by `start_sequence'.
36: Each element describes one pending sequence.
37: The main insn-chain is saved in the last element of the chain,
38: unless the chain is empty. */
39:
40: struct sequence_stack
41: {
42: /* First and last insns in the chain of the saved sequence. */
43: rtx first, last;
44: struct sequence_stack *next;
45: };
46:
47: extern struct sequence_stack *sequence_stack;
48:
49: /* This structure can save all the important global and static variables
50: describing the status of the current function. */
51:
52: struct function
53: {
54: struct function *next;
55:
56: /* For function.c. */
57: char *name;
58: tree decl;
59: int pops_args;
60: int returns_struct;
61: int returns_pcc_struct;
62: int needs_context;
63: int calls_setjmp;
64: int calls_longjmp;
65: int calls_alloca;
66: int has_nonlocal_label;
67: rtx nonlocal_goto_handler_slot;
68: rtx nonlocal_goto_stack_level;
69: tree nonlocal_labels;
70: int args_size;
71: int pretend_args_size;
72: rtx arg_offset_rtx;
73: int max_parm_reg;
74: rtx *parm_reg_stack_loc;
75: int outgoing_args_size;
76: rtx return_rtx;
77: rtx cleanup_label;
78: rtx return_label;
79: rtx save_expr_regs;
80: rtx stack_slot_list;
81: rtx parm_birth_insn;
82: int frame_offset;
83: rtx tail_recursion_label;
84: rtx tail_recursion_reentry;
85: rtx internal_arg_pointer;
86: rtx arg_pointer_save_area;
87: tree rtl_expr_chain;
88: rtx last_parm_insn;
89: tree context_display;
90: tree trampoline_list;
91: int function_call_count;
92: struct temp_slot *temp_slots;
93: int temp_slot_level;
94: /* This slot is initialized as 0 and is added to
95: during the nested function. */
96: struct var_refs_queue *fixup_var_refs_queue;
97:
98: /* For stmt.c */
99: struct nesting *block_stack;
100: struct nesting *stack_block_stack;
101: struct nesting *cond_stack;
102: struct nesting *loop_stack;
103: struct nesting *case_stack;
104: struct nesting *nesting_stack;
105: int nesting_depth;
106: int block_start_count;
107: tree last_expr_type;
108: rtx last_expr_value;
109: int expr_stmts_for_value;
110: char *emit_filename;
111: int emit_lineno;
112: struct goto_fixup *goto_fixup_chain;
113:
114: /* For expr.c. */
115: int pending_stack_adjust;
116: int inhibit_defer_pop;
117: tree cleanups_this_call;
118: rtx saveregs_value;
119:
120: /* For emit-rtl.c. */
121: int reg_rtx_no;
122: int first_label_num;
123: rtx first_insn;
124: rtx last_insn;
125: struct sequence_stack *sequence_stack;
126: int cur_insn_uid;
127: int last_linenum;
128: char *last_filename;
129: char *regno_pointer_flag;
130: int regno_pointer_flag_length;
131: rtx *regno_reg_rtx;
132:
133: /* For stor-layout.c. */
134: tree permanent_type_chain;
135: tree temporary_type_chain;
136: tree permanent_type_end;
137: tree temporary_type_end;
138: tree pending_sizes;
139: int immediate_size_expand;
140:
141: /* For tree.c. */
142: int all_types_permanent;
143: struct momentary_level *momentary_stack;
144: char *maybepermanent_firstobj;
145: char *temporary_firstobj;
146: char *momentary_firstobj;
147: struct obstack *current_obstack;
148: struct obstack *function_obstack;
149: struct obstack *function_maybepermanent_obstack;
150: struct obstack *expression_obstack;
151: struct obstack *saveable_obstack;
152: struct obstack *rtl_obstack;
153:
154: /* For integrate.c. */
155: int uses_const_pool;
156:
157: /* For md files. */
158: int uses_pic_offset_table;
159: };
160:
161: /* The FUNCTION_DECL for an inline function currently being expanded. */
162: extern tree inline_function_decl;
163:
164: /* Label that will go on function epilogue.
165: Jumping to this label serves as a "return" instruction
166: on machines which require execution of the epilogue on all returns. */
167: extern rtx return_label;
168:
169: /* List (chain of EXPR_LISTs) of all stack slots in this function.
170: Made for the sake of unshare_all_rtl. */
171: extern rtx stack_slot_list;
172:
173: #ifdef rtx
174: #undef rtx
175: #endif
176:
177: #ifdef tree
178: #undef tree
179: #endif
180:
181:
182: /* Given a function decl for a containing function,
183: return the `struct function' for it. */
184: struct function *find_function_data ();
185:
186: /* Pointer to chain of `struct function' for containing functions. */
187: extern struct function *outer_function_chain;
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