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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/function.h')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/function.h | 620 |
1 files changed, 0 insertions, 620 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/function.h b/gcc-4.2.1-5666.3/gcc/function.h deleted file mode 100644 index 4d5f306ec..000000000 --- a/gcc-4.2.1-5666.3/gcc/function.h +++ /dev/null @@ -1,620 +0,0 @@ -/* Structure for saving state for a nested function. - Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, - 1999, 2000, 2003, 2004, 2005 Free Software Foundation, Inc. - -This file is part of GCC. - -GCC 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. - -GCC 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 GCC; see the file COPYING. If not, write to the Free -Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301, USA. */ - -#ifndef GCC_FUNCTION_H -#define GCC_FUNCTION_H - -#include "tree.h" -#include "hashtab.h" - -struct var_refs_queue GTY(()) -{ - 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 GTY(()) -{ - /* First and last insns in the chain of the saved sequence. */ - rtx first; - rtx last; - struct sequence_stack *next; -}; - -extern struct sequence_stack *sequence_stack; - -/* Stack of single obstacks. */ - -struct simple_obstack_stack -{ - struct obstack *obstack; - struct simple_obstack_stack *next; -}; - -struct emit_status GTY(()) -{ - /* This is reset to LAST_VIRTUAL_REGISTER + 1 at the start of each function. - After rtl generation, it is 1 plus the largest register number used. */ - int x_reg_rtx_no; - - /* Lowest label number in current function. */ - int x_first_label_num; - - /* The ends of the doubly-linked chain of rtl for the current function. - Both are reset to null at the start of rtl generation for the function. - - start_sequence saves both of these on `sequence_stack' and then starts - a new, nested sequence of insns. */ - rtx x_first_insn; - rtx x_last_insn; - - /* 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 *sequence_stack; - - /* INSN_UID for next insn emitted. - Reset to 1 for each function compiled. */ - int x_cur_insn_uid; - - /* Location the last line-number NOTE emitted. - This is used to avoid generating duplicates. */ - location_t x_last_location; - - /* The length of the regno_pointer_align, regno_decl, and x_regno_reg_rtx - vectors. Since these vectors are needed during the expansion phase when - the total number of registers in the function is not yet known, the - vectors are copied and made bigger when necessary. */ - int regno_pointer_align_length; - - /* Indexed by pseudo register number, if nonzero gives the known alignment - for that pseudo (if REG_POINTER is set in x_regno_reg_rtx). - Allocated in parallel with x_regno_reg_rtx. */ - unsigned char * GTY ((length ("%h.x_reg_rtx_no"))) - regno_pointer_align; - - /* Indexed by pseudo register number, gives the rtx for that pseudo. - Allocated in parallel with regno_pointer_align. */ - rtx * GTY ((length ("%h.x_reg_rtx_no"))) x_regno_reg_rtx; -}; - -/* For backward compatibility... eventually these should all go away. */ -#define reg_rtx_no (cfun->emit->x_reg_rtx_no) -#define regno_reg_rtx (cfun->emit->x_regno_reg_rtx) -#define seq_stack (cfun->emit->sequence_stack) - -#define REGNO_POINTER_ALIGN(REGNO) (cfun->emit->regno_pointer_align[REGNO]) - -struct expr_status GTY(()) -{ - /* Number of units that we should eventually pop off the stack. - These are the arguments to function calls that have already returned. */ - int x_pending_stack_adjust; - - /* Under some ABIs, it is the caller's responsibility to pop arguments - pushed for function calls. A naive implementation would simply pop - the arguments immediately after each call. However, if several - function calls are made in a row, it is typically cheaper to pop - all the arguments after all of the calls are complete since a - single pop instruction can be used. Therefore, GCC attempts to - defer popping the arguments until absolutely necessary. (For - example, at the end of a conditional, the arguments must be popped, - since code outside the conditional won't know whether or not the - arguments need to be popped.) - - When INHIBIT_DEFER_POP is nonzero, however, the compiler does not - attempt to defer pops. Instead, the stack is popped immediately - after each call. Rather then setting this variable directly, use - NO_DEFER_POP and OK_DEFER_POP. */ - int x_inhibit_defer_pop; - - /* If PREFERRED_STACK_BOUNDARY and PUSH_ROUNDING are defined, the stack - boundary can be momentarily unaligned while pushing the arguments. - Record the delta since last aligned boundary here in order to get - stack alignment in the nested function calls working right. */ - int x_stack_pointer_delta; - - /* Nonzero means __builtin_saveregs has already been done in this function. - The value is the pseudoreg containing the value __builtin_saveregs - returned. */ - rtx x_saveregs_value; - - /* Similarly for __builtin_apply_args. */ - rtx x_apply_args_value; - - /* List of labels that must never be deleted. */ - rtx x_forced_labels; -}; - -#define pending_stack_adjust (cfun->expr->x_pending_stack_adjust) -#define inhibit_defer_pop (cfun->expr->x_inhibit_defer_pop) -#define saveregs_value (cfun->expr->x_saveregs_value) -#define apply_args_value (cfun->expr->x_apply_args_value) -#define forced_labels (cfun->expr->x_forced_labels) -#define stack_pointer_delta (cfun->expr->x_stack_pointer_delta) - -struct temp_slot; -typedef struct temp_slot *temp_slot_p; - -DEF_VEC_P(temp_slot_p); -DEF_VEC_ALLOC_P(temp_slot_p,gc); - -enum function_frequency { - /* This function most likely won't be executed at all. - (set only when profile feedback is available). */ - FUNCTION_FREQUENCY_UNLIKELY_EXECUTED, - /* The default value. */ - FUNCTION_FREQUENCY_NORMAL, - /* Optimize this function hard - (set only when profile feedback is available). */ - FUNCTION_FREQUENCY_HOT -}; - -/* This structure can save all the important global and static variables - describing the status of the current function. */ - -struct function GTY(()) -{ - struct eh_status *eh; - struct expr_status *expr; - struct emit_status *emit; - struct varasm_status *varasm; - - /* The control flow graph for this function. */ - struct control_flow_graph *cfg; - - /* For function.c. */ - - /* Points to the FUNCTION_DECL of this function. */ - tree decl; - - /* Function containing this function, if any. */ - struct function *outer; - - /* Number of bytes of args popped by function being compiled on its return. - Zero if no bytes are to be popped. - May affect compilation of return insn or of function epilogue. */ - int pops_args; - - /* If function's args have a fixed size, this is that size, in bytes. - Otherwise, it is -1. - May affect compilation of return insn or of function epilogue. */ - int args_size; - - /* # bytes the prologue should push and pretend that the caller pushed them. - The prologue must do this, but only if parms can be passed in - registers. */ - int pretend_args_size; - - /* # of bytes of outgoing arguments. If ACCUMULATE_OUTGOING_ARGS is - defined, the needed space is pushed by the prologue. */ - int outgoing_args_size; - - /* This is the offset from the arg pointer to the place where the first - anonymous arg can be found, if there is one. */ - rtx arg_offset_rtx; - - /* Quantities of various kinds of registers - used for the current function's args. */ - CUMULATIVE_ARGS args_info; - - /* If nonzero, an RTL expression for the location at which the current - function returns its result. If the current function returns its - result in a register, current_function_return_rtx will always be - the hard register containing the result. */ - rtx return_rtx; - - /* The arg pointer hard register, or the pseudo into which it was copied. */ - rtx internal_arg_pointer; - - /* Opaque pointer used by get_hard_reg_initial_val and - has_hard_reg_initial_val (see integrate.[hc]). */ - struct initial_value_struct *hard_reg_initial_vals; - - /* List (chain of EXPR_LIST) of labels heading the current handlers for - nonlocal gotos. */ - rtx x_nonlocal_goto_handler_labels; - - /* 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. */ - rtx x_return_label; - - /* Label that will go on the end of function epilogue. - Jumping to this label serves as a "naked return" instruction - on machines which require execution of the epilogue on all returns. */ - rtx x_naked_return_label; - - /* List (chain of EXPR_LISTs) of all stack slots in this function. - Made for the sake of unshare_all_rtl. */ - rtx x_stack_slot_list; - - /* Place after which to insert the tail_recursion_label if we need one. */ - rtx x_stack_check_probe_note; - - /* Location at which to save the argument pointer if it will need to be - referenced. There are two cases where this is done: if nonlocal gotos - exist, or if vars stored at an offset from the argument pointer will be - needed by inner routines. */ - rtx x_arg_pointer_save_area; - - /* APPLE LOCAL begin CW asm blocks */ - /* Nonzero if this is an all-assembly function. */ - unsigned int iasm_asm_function : 1; - /* Nonzero if we don't want to emit any return instructions. */ - unsigned int iasm_noreturn : 1; - /* If nonzero, use this as the explicitly-defined frame size. */ - int iasm_frame_size; - /* APPLE LOCAL end CW asm blocks */ - - /* APPLE LOCAL begin radar 6411649 */ - /* Holds a unique number for this function. It is used to - generate block number for block names. */ - int unqiue_block_number; - /* APPLE LOCAL end radar 6411649 */ - - /* Offset to end of allocated area of stack frame. - If stack grows down, this is the address of the last stack slot allocated. - If stack grows up, this is the address for the next slot. */ - HOST_WIDE_INT x_frame_offset; - - /* A PARM_DECL that should contain the static chain for this function. - It will be initialized at the beginning of the function. */ - tree static_chain_decl; - - /* An expression that contains the non-local goto save area. The first - word is the saved frame pointer and the second is the saved stack - pointer. */ - tree nonlocal_goto_save_area; - - /* Insn after which register parms and SAVE_EXPRs are born, if nonopt. */ - rtx x_parm_birth_insn; - - /* List of all used temporaries allocated, by level. */ - VEC(temp_slot_p,gc) *x_used_temp_slots; - - /* List of available temp slots. */ - struct temp_slot *x_avail_temp_slots; - - /* This slot is initialized as 0 and is added to - during the nested function. */ - struct var_refs_queue *fixup_var_refs_queue; - - /* Current nesting level for temporaries. */ - int x_temp_slot_level; - - /* Highest label number in current function. */ - int inl_max_label_num; - - /* Function sequence number for profiling, debugging, etc. */ - int funcdef_no; - - /* For flow.c. */ - - /* Highest loop depth seen so far in loop analysis. Used in flow.c - for the "failure strategy" when doing liveness analysis starting - with non-empty initial sets. */ - int max_loop_depth; - - /* For md files. */ - - /* tm.h can use this to store whatever it likes. */ - struct machine_function * GTY ((maybe_undef)) machine; - - /* The largest alignment of slot allocated on the stack. */ - unsigned int stack_alignment_needed; - - /* Preferred alignment of the end of stack frame. */ - unsigned int preferred_stack_boundary; - - /* Language-specific code can use this to store whatever it likes. */ - struct language_function * language; - - /* Used types hash table. */ - htab_t GTY ((param_is (union tree_node))) used_types_hash; - - /* For reorg. */ - - /* If some insns can be deferred to the delay slots of the epilogue, the - delay list for them is recorded here. */ - rtx epilogue_delay_list; - - /* Maximal number of entities in the single jumptable. Used to estimate - final flowgraph size. */ - int max_jumptable_ents; - - /* APPLE LOCAL begin sibcall optimization stomped CW frames (radar 3007352) */ - int unrounded_args_size; - /* APPLE LOCAL end sibcall optimization stomped CW frames (radar 3007352) */ - - /* UIDs for LABEL_DECLs. */ - int last_label_uid; - - /* Line number of the end of the function. */ - location_t function_end_locus; - - /* Array mapping insn uids to blocks. */ - VEC(tree,gc) *ib_boundaries_block; - - /* The variables unexpanded so far. */ - tree unexpanded_var_list; - - /* Assembly labels for the hot and cold text sections, to - be used by debugger functions for determining the size of text - sections. */ - - const char *hot_section_label; - const char *cold_section_label; - const char *hot_section_end_label; - const char *cold_section_end_label; - - /* String to be used for name of cold text sections, via - targetm.asm_out.named_section. */ - - const char *unlikely_text_section_name; - - /* A variable living at the top of the frame that holds a known value. - Used for detecting stack clobbers. */ - tree stack_protect_guard; - - /* Collected bit flags. */ - - /* Nonzero if function being compiled needs to be given an address - where the value should be stored. */ - unsigned int returns_struct : 1; - - /* Nonzero if function being compiled needs to - return the address of where it has put a structure value. */ - unsigned int returns_pcc_struct : 1; - - /* Nonzero if the current function returns a pointer type. */ - unsigned int returns_pointer : 1; - - /* Nonzero if function being compiled can call setjmp. */ - unsigned int calls_setjmp : 1; - - /* Nonzero if function being compiled can call alloca, - either as a subroutine or builtin. */ - unsigned int calls_alloca : 1; - - /* Nonzero if function being compiled called builtin_return_addr or - builtin_frame_address with nonzero count. */ - unsigned int accesses_prior_frames : 1; - - /* Nonzero if the function calls __builtin_eh_return. */ - unsigned int calls_eh_return : 1; - - /* Nonzero if function being compiled receives nonlocal gotos - from nested functions. */ - unsigned int has_nonlocal_label : 1; - - /* Nonzero if function being compiled has nonlocal gotos to parent - function. */ - unsigned int has_nonlocal_goto : 1; - - /* Nonzero if the current function is a thunk, i.e., a lightweight - function implemented by the output_mi_thunk hook) that just - adjusts one of its arguments and forwards to another - function. */ - unsigned int is_thunk : 1; - - /* This bit is used by the exception handling logic. It is set if all - calls (if any) are sibling calls. Such functions do not have to - have EH tables generated, as they cannot throw. A call to such a - function, however, should be treated as throwing if any of its callees - can throw. */ - unsigned int all_throwers_are_sibcalls : 1; - - /* Nonzero if profiling code should be generated. */ - unsigned int profile : 1; - - /* Nonzero if stack limit checking should be enabled in the current - function. */ - unsigned int limit_stack : 1; - - /* Nonzero if current function uses stdarg.h or equivalent. */ - unsigned int stdarg : 1; - - /* Nonzero if the back-end should not keep track of expressions that - determine the size of variable-sized objects. Normally, such - expressions are saved away, and then expanded when the next - function is started. For example, if a parameter has a - variable-sized type, then the size of the parameter is computed - when the function body is entered. However, some front-ends do - not desire this behavior. */ - unsigned int x_dont_save_pending_sizes_p : 1; - - /* Nonzero if the current function uses the constant pool. */ - unsigned int uses_const_pool : 1; - - /* Nonzero if the current function uses pic_offset_table_rtx. */ - unsigned int uses_pic_offset_table : 1; - - /* Nonzero if the current function needs an lsda for exception handling. */ - unsigned int uses_eh_lsda : 1; - - /* Nonzero if code to initialize arg_pointer_save_area has been emitted. */ - unsigned int arg_pointer_save_area_init : 1; - - /* APPLE LOCAL begin 3837835 */ - unsigned int uses_vector : 1; - /* APPLE LOCAL end 3837835 */ - - /* APPLE LOCAL begin ARM compact switch tables */ - unsigned int needs_4byte_alignment : 1; - /* APPLE LOCAL end ARM compact switch tables */ - - /* APPLE LOCAL begin ARM reliable backtraces */ - unsigned int calls_builtin_ret_addr : 1; - unsigned int calls_builtin_frame_addr : 1; - /* APPLE LOCAL end ARM reliable backtraces */ - - unsigned int after_inlining : 1; - - /* Set when the call to function itself has been emit. */ - unsigned int recursive_call_emit : 1; - - /* Set when the tail call has been produced. */ - unsigned int tail_call_emit : 1; - - /* How commonly executed the function is. Initialized during branch - probabilities pass. */ - ENUM_BITFIELD (function_frequency) function_frequency : 2; - - /* Number of units of general registers that need saving in stdarg - function. What unit is depends on the backend, either it is number - of bytes, or it can be number of registers. */ - unsigned int va_list_gpr_size : 8; - - /* Number of units of floating point registers that need saving in stdarg - function. */ - unsigned int va_list_fpr_size : 8; -}; - -/* If va_list_[gf]pr_size is set to this, it means we don't know how - many units need to be saved. */ -#define VA_LIST_MAX_GPR_SIZE 255 -#define VA_LIST_MAX_FPR_SIZE 255 - -/* The function currently being compiled. */ -extern GTY(()) struct function *cfun; - -/* Pointer to chain of `struct function' for containing functions. */ -extern GTY(()) struct function *outer_function_chain; - -/* Nonzero if we've already converted virtual regs to hard regs. */ -extern int virtuals_instantiated; - -/* Nonzero if at least one trampoline has been created. */ -extern int trampolines_created; - -/* For backward compatibility... eventually these should all go away. */ -#define current_function_pops_args (cfun->pops_args) -#define current_function_returns_struct (cfun->returns_struct) -#define current_function_returns_pcc_struct (cfun->returns_pcc_struct) -#define current_function_returns_pointer (cfun->returns_pointer) -#define current_function_calls_setjmp (cfun->calls_setjmp) -#define current_function_calls_alloca (cfun->calls_alloca) -#define current_function_accesses_prior_frames (cfun->accesses_prior_frames) -#define current_function_calls_eh_return (cfun->calls_eh_return) -#define current_function_is_thunk (cfun->is_thunk) -#define current_function_args_info (cfun->args_info) -#define current_function_args_size (cfun->args_size) -#define current_function_pretend_args_size (cfun->pretend_args_size) -#define current_function_outgoing_args_size (cfun->outgoing_args_size) -#define current_function_arg_offset_rtx (cfun->arg_offset_rtx) -#define current_function_stdarg (cfun->stdarg) -#define current_function_internal_arg_pointer (cfun->internal_arg_pointer) -#define current_function_return_rtx (cfun->return_rtx) -#define current_function_profile (cfun->profile) -#define current_function_funcdef_no (cfun->funcdef_no) -#define current_function_limit_stack (cfun->limit_stack) -#define current_function_uses_pic_offset_table (cfun->uses_pic_offset_table) -#define current_function_uses_const_pool (cfun->uses_const_pool) -#define current_function_epilogue_delay_list (cfun->epilogue_delay_list) -#define current_function_has_nonlocal_label (cfun->has_nonlocal_label) -#define current_function_has_nonlocal_goto (cfun->has_nonlocal_goto) -/* APPLE LOCAL begin ARM reliable backtraces */ -#define current_function_calls_builtin_ret_addr (cfun->calls_builtin_ret_addr) -#define current_function_calls_builtin_frame_addr (cfun->calls_builtin_frame_addr) -/* APPLE LOCAL end ARM reliable backtraces */ - -#define return_label (cfun->x_return_label) -#define naked_return_label (cfun->x_naked_return_label) -#define stack_slot_list (cfun->x_stack_slot_list) -#define parm_birth_insn (cfun->x_parm_birth_insn) -#define frame_offset (cfun->x_frame_offset) -#define stack_check_probe_note (cfun->x_stack_check_probe_note) -#define arg_pointer_save_area (cfun->x_arg_pointer_save_area) -#define used_temp_slots (cfun->x_used_temp_slots) -#define avail_temp_slots (cfun->x_avail_temp_slots) -#define temp_slot_level (cfun->x_temp_slot_level) -#define nonlocal_goto_handler_labels (cfun->x_nonlocal_goto_handler_labels) - -/* Given a function decl for a containing function, - return the `struct function' for it. */ -struct function *find_function_data (tree); - -/* Identify BLOCKs referenced by more than one NOTE_INSN_BLOCK_{BEG,END}, - and create duplicate blocks. */ -extern void reorder_blocks (void); - -/* Set BLOCK_NUMBER for all the blocks in FN. */ -extern void number_blocks (tree); - -extern void clear_block_marks (tree); -extern tree blocks_nreverse (tree); -extern void reset_block_changes (void); -extern void record_block_change (tree); -extern void finalize_block_changes (void); -extern void check_block_change (rtx, tree *); -extern void free_block_changes (void); - -/* Return size needed for stack frame based on slots so far allocated. - This size counts from zero. It is not rounded to STACK_BOUNDARY; - the caller may have to do that. */ -extern HOST_WIDE_INT get_frame_size (void); - -/* Issue an error message and return TRUE if frame OFFSET overflows in - the signed target pointer arithmetics for function FUNC. Otherwise - return FALSE. */ -extern bool frame_offset_overflow (HOST_WIDE_INT, tree); - -/* A pointer to a function to create target specific, per-function - data structures. */ -extern struct machine_function * (*init_machine_status) (void); - -/* Save and restore status information for a nested function. */ -extern void free_after_parsing (struct function *); -extern void free_after_compilation (struct function *); - -extern void init_varasm_status (struct function *); - -#ifdef RTX_CODE -extern void diddle_return_value (void (*)(rtx, void*), void*); -extern void clobber_return_register (void); -#endif - -extern rtx get_arg_pointer_save_area (struct function *); - -/* Returns the name of the current function. */ -extern const char *current_function_name (void); - -extern void do_warn_unused_parameter (tree); - -extern bool pass_by_reference (CUMULATIVE_ARGS *, enum machine_mode, - tree, bool); -extern bool reference_callee_copied (CUMULATIVE_ARGS *, enum machine_mode, - tree, bool); - -extern void used_types_insert (tree); - -/* APPLE LOCAL radar 5732232 - blocks */ -extern struct block_sema_info *cur_block; -#endif /* GCC_FUNCTION_H */ |