Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
1999, 2000 Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-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.
+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.
-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.
+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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
-
-#if !defined(NULL_TREE) && !defined(tree)
-typedef union union_node *_function_tree;
-#define tree _function_tree
-#endif
-#if !defined(NULL_RTX) && !defined(rtx)
-typedef struct rtx_def *_function_rtx;
-#define rtx _function_rtx
-#endif
-
-struct var_refs_queue
+struct var_refs_queue GTY(())
{
rtx modified;
enum machine_mode promoted_mode;
The main insn-chain is saved in the last element of the chain,
unless the chain is empty. */
-struct sequence_stack
+struct sequence_stack GTY(())
{
/* First and last insns in the chain of the saved sequence. */
- rtx first, last;
+ rtx first;
+ rtx last;
tree sequence_rtl_expr;
struct sequence_stack *next;
};
struct simple_obstack_stack *next;
};
\f
-struct emit_status
+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_last_linenum;
const char *x_last_filename;
- /* A vector indexed by pseudo reg number. The allocated length
- of this vector is regno_pointer_flag_length. Since this
- vector is needed during the expansion phase when the total
- number of registers in the function is not yet known,
- it is copied and made bigger when necessary. */
- char *regno_pointer_flag;
- int regno_pointer_flag_length;
+ /* 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 regno_pointer_flag is set).
- Allocated in parallel with regno_pointer_flag. */
- char *regno_pointer_align;
+ 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.regno_pointer_align_length")))
+ regno_pointer_align;
+
+ /* Indexed by pseudo register number, if nonzero gives the decl
+ corresponding to that register. */
+ tree * GTY ((length ("%h.regno_pointer_align_length"))) regno_decl;
/* Indexed by pseudo register number, gives the rtx for that pseudo.
- Allocated in parallel with regno_pointer_flag. */
- rtx *x_regno_reg_rtx;
+ Allocated in parallel with regno_pointer_align.
+
+ Note MEM expressions can appear in this array due to the actions
+ of put_var_into_stack. */
+ rtx * GTY ((length ("%h.regno_pointer_align_length"))) x_regno_reg_rtx;
};
/* For backward compatibility... eventually these should all go away. */
#define seq_stack (cfun->emit->sequence_stack)
#define REGNO_POINTER_ALIGN(REGNO) (cfun->emit->regno_pointer_align[REGNO])
-#define REGNO_POINTER_FLAG(REGNO) (cfun->emit->regno_pointer_flag[REGNO])
+#define REGNO_DECL(REGNO) (cfun->emit->regno_decl[REGNO])
-struct expr_status
+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;
- /* Number of units that we should eventually pop off the stack.
- These are the arguments to function calls that have not happened yet. */
- int x_arg_space_so_far;
-
/* 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
since code outside the conditional won't know whether or not the
arguments need to be popped.)
- When INHIBIT_DEFER_POP is non-zero, however, the compiler does not
+ 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. */
};
#define pending_stack_adjust (cfun->expr->x_pending_stack_adjust)
-#define arg_space_so_far (cfun->expr->x_arg_space_so_far)
#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 pending_chain (cfun->expr->x_pending_chain)
+#define stack_pointer_delta (cfun->expr->x_stack_pointer_delta)
/* This structure can save all the important global and static variables
describing the status of the current function. */
-struct function
+struct function GTY(())
{
- struct function *next_global;
- struct function *next;
-
struct eh_status *eh;
struct stmt_status *stmt;
struct expr_status *expr;
/* Name of this function. */
const char *name;
- /* Points to the FUNCTION_DECL of this function. */
+
+ /* 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;
- /* Nonzero if function being compiled needs to be given an address
- where the value should be stored. */
- int returns_struct;
-
- /* Nonzero if function being compiled needs to
- return the address of where it has put a structure value. */
- int returns_pcc_struct;
-
- /* Nonzero if the current function returns a pointer type. */
- int returns_pointer;
-
- /* Nonzero if function being compiled needs to be passed a static chain. */
- int needs_context;
-
- /* Nonzero if function being compiled can call setjmp. */
- int calls_setjmp;
-
- /* Nonzero if function being compiled can call longjmp. */
- int calls_longjmp;
-
- /* Nonzero if function being compiled can call alloca,
- either as a subroutine or builtin. */
- int calls_alloca;
-
- /* Nonzero if function being compiled receives nonlocal gotos
- from nested functions. */
-
- int has_nonlocal_label;
-
- /* Nonzero if function being compiled has nonlocal gotos to parent
- function. */
- int has_nonlocal_goto;
-
- /* Nonzero if function being compiled contains nested functions. */
- int contains_functions;
-
- /* Nonzero if the function being compiled issues a computed jump. */
- int has_computed_jump;
-
- /* Nonzero if the current function is a thunk (a lightweight function that
- just adjusts one of its arguments and forwards to another function), so
- we should try to cut corners where we can. */
- int is_thunk;
-
/* 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. */
anonymous arg can be found, if there is one. */
rtx arg_offset_rtx;
- /* Nonzero if current function uses varargs.h or equivalent.
- Zero for functions that use stdarg.h. */
- int varargs;
-
- /* Nonzero if current function uses stdarg.h or equivalent.
- Zero for functions that use varargs.h. */
- int stdarg;
-
/* Quantities of various kinds of registers
used for the current function's args. */
CUMULATIVE_ARGS args_info;
- /* If non-zero, an RTL expression for the location at which the current
+ /* 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. */
inline. */
const char *cannot_inline;
- /* Nonzero if instrumentation calls for function entry and exit should be
- generated. */
- int instrument_entry_exit;
-
- /* Nonzero if memory access checking be enabled in the current function. */
- int check_memory_usage;
-
- /* Nonzero if stack limit checking should be enabled in the current
- function. */
- int limit_stack;
+ /* 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;
/* Number of function calls seen so far in current function. */
int x_function_call_count;
- /* Nonzero if this function is being processed in function-at-a-time
- mode. In other words, if all tree structure for this function,
- including the BLOCK tree, is created before RTL generation
- commences. */
- int x_whole_function_mode_p;
-
- /* 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. */
- int x_dont_save_pending_sizes_p;
-
/* List (chain of TREE_LIST) of LABEL_DECLs for all nonlocal labels
(labels to which there can be nonlocal gotos from nested functions)
in this function. */
needed by inner routines. */
rtx x_arg_pointer_save_area;
+ /* If the function returns non-void, we will emit a clobber of the
+ return registers just in case the user fell off the end without
+ returning a proper value. This is that insn. */
+ rtx x_clobber_return_insn;
+
/* 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. */
rtx x_last_parm_insn;
/* 1 + last pseudo register number possibly used for loading a copy
- of a parameter of this function. */
+ of a parameter of this function. */
unsigned int x_max_parm_reg;
/* Vector indexed by REGNO, containing location on stack in which
to put the parm which is nominally in pseudo register REGNO,
if we discover that that parm must go in the stack. The highest
element in this vector is one less than MAX_PARM_REG, above. */
- rtx *x_parm_reg_stack_loc;
+ rtx * GTY ((length ("%h.x_max_parm_reg"))) x_parm_reg_stack_loc;
/* List of all temporaries allocated, both available and in use. */
struct temp_slot *x_temp_slots;
during the nested function. */
struct var_refs_queue *fixup_var_refs_queue;
- /* For tree.c. */
- int all_types_permanent;
- struct momentary_level *momentary_stack;
- char *maybepermanent_firstobj;
- char *temporary_firstobj;
- char *momentary_firstobj;
- char *momentary_function_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 inlinable;
- /* This is in fact an rtvec. */
- void *original_arg_vector;
+ int no_debugging_symbols;
+ rtvec original_arg_vector;
tree original_decl_initial;
/* Last insn of those whose job was to put parms into their nominal
homes. */
/* Highest label number in current function. */
int inl_max_label_num;
- /* Nonzero if the current function uses the constant pool. */
- int uses_const_pool;
+ /* Function sequence number for profiling, debugging, etc. */
+ int funcdef_no;
/* For md files. */
- /* Nonzero if the current function uses pic_offset_table_rtx. */
- int uses_pic_offset_table;
/* tm.h can use this to store whatever it likes. */
- struct machine_function *machine;
+ struct machine_function * GTY ((maybe_undef (""))) machine;
/* The largest alignment of slot allocated on the stack. */
int stack_alignment_needed;
/* Preferred alignment of the end of stack frame. */
int preferred_stack_boundary;
/* Language-specific code can use this to store whatever it likes. */
- struct language_function *language;
+ struct language_function * language;
/* 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;
+
+ /* 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 needs to be passed a static chain. */
+ unsigned int needs_context : 1;
+
+ /* Nonzero if function being compiled can call setjmp. */
+ unsigned int calls_setjmp : 1;
+
+ /* Nonzero if function being compiled can call longjmp. */
+ unsigned int calls_longjmp : 1;
+
+ /* Nonzero if function being compiled can call alloca,
+ either as a subroutine or builtin. */
+ unsigned int calls_alloca : 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 function being compiled contains nested functions. */
+ unsigned int contains_functions : 1;
+
+ /* Nonzero if the function being compiled issues a computed jump. */
+ unsigned int has_computed_jump : 1;
+
+ /* Nonzero if the current function is a thunk (a lightweight function that
+ just adjusts one of its arguments and forwards to another function), so
+ we should try to cut corners where we can. */
+ 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 instrumentation calls for function entry and exit should be
+ generated. */
+ unsigned int instrument_entry_exit : 1;
+
+ /* Nonzero if arc profiling should be done for the function. */
+ unsigned int arc_profile : 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 this function is being processed in function-at-a-time
+ mode. In other words, if all tree structure for this function,
+ including the BLOCK tree, is created before RTL generation
+ commences. */
+ unsigned int x_whole_function_mode_p : 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 emited. */
+ unsigned int arg_pointer_save_area_init : 1;
+
+ /* How commonly executed the function is. Initialized during branch
+ probabilities pass. */
+ 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
+ } function_frequency;
+
+ /* Maximal number of entities in the single jumptable. Used to estimate
+ final flowgraph size. */
+ int max_jumptable_ents;
};
/* The function currently being compiled. */
-extern struct function *cfun;
+extern GTY(()) struct function *cfun;
-/* A list of all functions we have compiled so far. */
-extern struct function *all_functions;
+/* Nonzero if we've already converted virtual regs to hard regs. */
+extern int virtuals_instantiated;
/* For backward compatibility... eventually these should all go away. */
#define current_function_name (cfun->name)
#define current_function_calls_setjmp (cfun->calls_setjmp)
#define current_function_calls_alloca (cfun->calls_alloca)
#define current_function_calls_longjmp (cfun->calls_longjmp)
+#define current_function_calls_eh_return (cfun->calls_eh_return)
#define current_function_has_computed_jump (cfun->has_computed_jump)
#define current_function_contains_functions (cfun->contains_functions)
#define current_function_is_thunk (cfun->is_thunk)
#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_varargs (cfun->varargs)
#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_instrument_entry_exit (cfun->instrument_entry_exit)
-#define current_function_check_memory_usage (cfun->check_memory_usage)
+#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)
return the `struct function' for it. */
struct function *find_function_data PARAMS ((tree));
-/* Pointer to chain of `struct function' for containing functions. */
-extern struct function *outer_function_chain;
-
/* Set NOTE_BLOCK for each block note in the current function. */
extern void identify_blocks PARAMS ((void));
/* Likewise, but for a different than the current function. */
extern HOST_WIDE_INT get_func_frame_size PARAMS ((struct function *));
-/* These variables hold pointers to functions to
- save and restore machine-specific data,
- in push_function_context and pop_function_context. */
-extern void (*init_machine_status) PARAMS ((struct function *));
-extern void (*mark_machine_status) PARAMS ((struct function *));
-extern void (*save_machine_status) PARAMS ((struct function *));
-extern void (*restore_machine_status) PARAMS ((struct function *));
-extern void (*free_machine_status) PARAMS ((struct function *));
-
-/* Likewise, but for language-specific data. */
-extern void (*init_lang_status) PARAMS ((struct function *));
-extern void (*mark_lang_status) PARAMS ((struct function *));
-extern void (*save_lang_status) PARAMS ((struct function *));
-extern void (*restore_lang_status) PARAMS ((struct function *));
-extern void (*free_lang_status) PARAMS ((struct function *));
+/* A pointer to a function to create target specific, per-function
+ data structures. */
+extern struct machine_function * (*init_machine_status) PARAMS ((void));
/* Save and restore status information for a nested function. */
-extern void save_tree_status PARAMS ((struct function *));
-extern void restore_tree_status PARAMS ((struct function *));
extern void restore_emit_status PARAMS ((struct function *));
extern void free_after_parsing PARAMS ((struct function *));
extern void free_after_compilation PARAMS ((struct function *));
extern void init_varasm_status PARAMS ((struct function *));
-extern void free_varasm_status PARAMS ((struct function *));
-extern void free_emit_status PARAMS ((struct function *));
-extern void free_stmt_status PARAMS ((struct function *));
-extern void free_eh_status PARAMS ((struct function *));
-extern void free_expr_status PARAMS ((struct function *));
-
-extern rtx get_first_block_beg PARAMS ((void));
#ifdef RTX_CODE
extern void diddle_return_value PARAMS ((void (*)(rtx, void*), void*));
extern void use_return_register PARAMS ((void));
#endif
+extern rtx get_arg_pointer_save_area PARAMS ((struct function *));
+
extern void init_virtual_regs PARAMS ((struct emit_status *));
/* Called once, at initialization, to initialize function.c. */
extern void init_function_once PARAMS ((void));
-
-#ifdef rtx
-#undef rtx
-#endif
-
-#ifdef tree
-#undef tree
-#endif
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