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- /* Structure for saving state for a nested function.
- Copyright (C) 1989, 1992, 1993 Free Software Foundation, Inc.
-
- This file is part of GNU CC.
-
- GNU CC is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU CC is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- #ifndef NULL_TREE
- #define tree int *
- #endif
- #ifndef GET_CODE
- #define rtx int *
- #endif
-
- struct var_refs_queue
- {
- rtx modified;
- enum machine_mode promoted_mode;
- int unsignedp;
- struct var_refs_queue *next;
- };
-
- /* Stack of pending (incomplete) sequences saved by `start_sequence'.
- Each element describes one pending sequence.
- The main insn-chain is saved in the last element of the chain,
- unless the chain is empty. */
-
- struct sequence_stack
- {
- /* First and last insns in the chain of the saved sequence. */
- rtx first, last;
- tree sequence_rtl_expr;
- struct sequence_stack *next;
- };
-
- extern struct sequence_stack *sequence_stack;
-
- /* This structure can save all the important global and static variables
- describing the status of the current function. */
-
- struct function
- {
- struct function *next;
-
- /* For function.c. */
- char *name;
- tree decl;
- int pops_args;
- int returns_struct;
- int returns_pcc_struct;
- int needs_context;
- int calls_setjmp;
- int calls_longjmp;
- int calls_alloca;
- int has_nonlocal_label;
- int has_nonlocal_goto;
- rtx nonlocal_goto_handler_slot;
- rtx nonlocal_goto_stack_level;
- tree nonlocal_labels;
- int args_size;
- int pretend_args_size;
- rtx arg_offset_rtx;
- int max_parm_reg;
- rtx *parm_reg_stack_loc;
- int outgoing_args_size;
- rtx return_rtx;
- rtx cleanup_label;
- rtx return_label;
- rtx save_expr_regs;
- rtx stack_slot_list;
- rtx parm_birth_insn;
- int frame_offset;
- rtx tail_recursion_label;
- rtx tail_recursion_reentry;
- rtx internal_arg_pointer;
- rtx arg_pointer_save_area;
- tree rtl_expr_chain;
- rtx last_parm_insn;
- tree context_display;
- tree trampoline_list;
- int function_call_count;
- struct temp_slot *temp_slots;
- int temp_slot_level;
- /* This slot is initialized as 0 and is added to
- during the nested function. */
- struct var_refs_queue *fixup_var_refs_queue;
-
- /* For stmt.c */
- struct nesting *block_stack;
- struct nesting *stack_block_stack;
- struct nesting *cond_stack;
- struct nesting *loop_stack;
- struct nesting *case_stack;
- struct nesting *nesting_stack;
- int nesting_depth;
- int block_start_count;
- tree last_expr_type;
- rtx last_expr_value;
- int expr_stmts_for_value;
- char *emit_filename;
- int emit_lineno;
- struct goto_fixup *goto_fixup_chain;
-
- /* For expr.c. */
- int pending_stack_adjust;
- int inhibit_defer_pop;
- tree cleanups_this_call;
- rtx saveregs_value;
- rtx apply_args_value;
- rtx forced_labels;
-
- /* For emit-rtl.c. */
- int reg_rtx_no;
- int first_label_num;
- rtx first_insn;
- rtx last_insn;
- tree sequence_rtl_expr;
- struct sequence_stack *sequence_stack;
- int cur_insn_uid;
- int last_linenum;
- char *last_filename;
- char *regno_pointer_flag;
- int regno_pointer_flag_length;
- rtx *regno_reg_rtx;
-
- /* For stor-layout.c. */
- tree permanent_type_chain;
- tree temporary_type_chain;
- tree permanent_type_end;
- tree temporary_type_end;
- tree pending_sizes;
- int immediate_size_expand;
-
- /* For tree.c. */
- int all_types_permanent;
- struct momentary_level *momentary_stack;
- char *maybepermanent_firstobj;
- char *temporary_firstobj;
- char *momentary_firstobj;
- struct obstack *current_obstack;
- struct obstack *function_obstack;
- struct obstack *function_maybepermanent_obstack;
- struct obstack *expression_obstack;
- struct obstack *saveable_obstack;
- struct obstack *rtl_obstack;
-
- /* For integrate.c. */
- int uses_const_pool;
-
- /* For md files. */
- int uses_pic_offset_table;
- /* tm.h can use this to store whatever it likes. */
- struct machine_function *machine;
-
- /* For reorg. */
- rtx epilogue_delay_list;
-
- /* For varasm. */
- struct constant_descriptor **const_rtx_hash_table;
- struct pool_sym **const_rtx_sym_hash_table;
- struct pool_constant *first_pool, *last_pool;
- int pool_offset;
- };
-
- /* The FUNCTION_DECL for an inline function currently being expanded. */
- extern tree inline_function_decl;
-
- /* Label that will go on function epilogue.
- Jumping to this label serves as a "return" instruction
- on machines which require execution of the epilogue on all returns. */
- extern rtx return_label;
-
- /* List (chain of EXPR_LISTs) of all stack slots in this function.
- Made for the sake of unshare_all_rtl. */
- extern rtx stack_slot_list;
-
- /* Given a function decl for a containing function,
- return the `struct function' for it. */
- struct function *find_function_data PROTO((tree));
-
- /* Pointer to chain of `struct function' for containing functions. */
- extern struct function *outer_function_chain;
-
- /* Put all this function's BLOCK nodes into a vector and return it.
- Also store in each NOTE for the beginning or end of a block
- the index of that block in the vector. */
- extern tree *identify_blocks PROTO((tree, rtx));
-
- /* These variables hold pointers to functions to
- save and restore machine-specific data,
- in push_function_context and pop_function_context. */
- extern void (*save_machine_status) ();
- extern void (*restore_machine_status) ();
-
- #ifdef rtx
- #undef rtx
- #endif
-
- #ifdef tree
- #undef tree
- #endif
-