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Annotation of gcc/function.h, revision 1.1

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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