/* 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.
+ 1999, 2000, 2003, 2004, 2005, 2006, 2007 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
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#ifndef GCC_FUNCTION_H
#define GCC_FUNCTION_H
-struct var_refs_queue GTY(())
-{
- rtx modified;
- enum machine_mode promoted_mode;
- int unsignedp;
- struct var_refs_queue *next;
-};
+#include "tree.h"
+#include "hashtab.h"
/* Stack of pending (incomplete) sequences saved by `start_sequence'.
Each element describes one pending sequence.
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;
-};
\f
struct emit_status GTY(())
{
#define forced_labels (cfun->expr->x_forced_labels)
#define stack_pointer_delta (cfun->expr->x_stack_pointer_delta)
+struct gimple_df;
+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 or via function attribute). */
+ FUNCTION_FREQUENCY_UNLIKELY_EXECUTED,
+ /* The default value. */
+ FUNCTION_FREQUENCY_NORMAL,
+ /* Optimize this function hard
+ (set only when profile feedback is available or via function attribute). */
+ FUNCTION_FREQUENCY_HOT
+};
+
/* This structure can save all the important global and static variables
describing the status of the current function. */
/* The control flow graph for this function. */
struct control_flow_graph *cfg;
- bool after_inlining;
+ /* SSA and dataflow information. */
+ struct gimple_df *gimple_df;
- /* For tree-optimize.c. */
+ /* The loops in this function. */
+ struct loops *x_current_loops;
- /* Saved tree and arguments during tree optimization. Used later for
- inlining */
- tree saved_tree;
- tree saved_args;
- tree saved_static_chain_decl;
+ /* Value histograms attached to particular statements. */
+ htab_t GTY((skip)) value_histograms;
/* For function.c. */
rtx x_stack_slot_list;
/* Place after which to insert the tail_recursion_label if we need one. */
- rtx x_tail_recursion_reentry;
+ 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
rtx x_parm_birth_insn;
/* List of all used temporaries allocated, by level. */
- struct varray_head_tag * GTY((param_is (struct temp_slot))) x_used_temp_slots;
+ VEC(temp_slot_p,gc) *x_used_temp_slots;
/* List of available temp slots. */
struct temp_slot *x_avail_temp_slots;
/* Current nesting level for temporaries. */
int x_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 integrate.c. */
- int inlinable;
- int no_debugging_symbols;
- rtvec original_arg_vector;
- tree original_decl_initial;
-
/* 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;
- /* Set when the call to function itself has been emit. */
- bool recursive_call_emit;
- /* Set when the tail call has been produced. */
- bool tail_call_emit;
/* 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;
- /* 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;
/* Line number of the end of the function. */
location_t function_end_locus;
- /* Array mapping insn uids to blocks. */
- struct varray_head_tag *ib_boundaries_block;
-
/* The variables unexpanded so far. */
tree unexpanded_var_list;
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;
+ 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;
+
+ /* Properties used by the pass manager. */
+ unsigned int curr_properties;
+ unsigned int last_verified;
+
/* 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;
+ /* 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;
- /* Nonzero if function being compiled needs to
- return the address of where it has put a structure value. */
- unsigned int returns_pcc_struct : 1;
+ /* Number of units of floating point registers that need saving in stdarg
+ function. */
+ unsigned int va_list_fpr_size : 8;
- /* Nonzero if the current function returns a pointer type. */
- unsigned int returns_pointer : 1;
+
+ /* How commonly executed the function is. Initialized during branch
+ probabilities pass. */
+ ENUM_BITFIELD (function_frequency) function_frequency : 2;
/* Nonzero if function being compiled can call setjmp. */
unsigned int calls_setjmp : 1;
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 saves all registers, e.g. if it has a nonlocal
+ label that can reach the exit block via non-exceptional paths. */
+ unsigned int saves_all_registers : 1;
+
/* Nonzero if function being compiled has nonlocal gotos to parent
function. */
unsigned int has_nonlocal_goto : 1;
+
+ /* Nonzero if function being compiled has an asm statement. */
+ unsigned int has_asm_statement : 1;
/* Nonzero if the current function is a thunk, i.e., a lightweight
function implemented by the output_mi_thunk hook) that just
function. */
unsigned int limit_stack : 1;
+
/* Nonzero if current function uses stdarg.h or equivalent. */
unsigned int stdarg : 1;
/* Nonzero if code to initialize arg_pointer_save_area has been emitted. */
unsigned int arg_pointer_save_area_init : 1;
- /* 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;
+ unsigned int after_inlining : 1;
- /* Number of units of floating point registers that need saving in stdarg
- function. */
- unsigned int va_list_fpr_size : 8;
+ /* 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;
+
+ /* FIXME tuples: This bit is temporarily here to mark when a
+ function has been gimplified, so we can make sure we're not
+ creating non GIMPLE tuples after gimplification. */
+ unsigned int gimplified : 1;
+
+ /* Fields below this point are not set for abstract functions; see
+ allocate_struct_function. */
+
+ /* 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;
};
/* If va_list_[gf]pr_size is set to this, it means we don't know how
/* The function currently being compiled. */
extern GTY(()) struct function *cfun;
+/* In order to ensure that cfun is not set directly, we redefine it so
+ that it is not an lvalue. Rather than assign to cfun, use
+ push_cfun or set_cfun. */
+#define cfun (cfun + 0)
+
/* Pointer to chain of `struct function' for containing functions. */
extern GTY(()) struct function *outer_function_chain;
/* Nonzero if at least one trampoline has been created. */
extern int trampolines_created;
+/* cfun shouldn't be set directly; use one of these functions instead. */
+extern void set_cfun (struct function *new_cfun);
+extern void push_cfun (struct function *new_cfun);
+extern void pop_cfun (void);
+
/* 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_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_saves_all_registers (cfun->saves_all_registers)
#define current_function_has_nonlocal_goto (cfun->has_nonlocal_goto)
+#define current_function_has_asm_statement (cfun->has_asm_statement)
#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 tail_recursion_reentry (cfun->x_tail_recursion_reentry)
+#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)
+#define rtl_df (cfun->df)
+#define current_loops (cfun->x_current_loops)
+#define dom_computed (cfun->cfg->x_dom_computed)
+#define n_bbs_in_dom_tree (cfun->cfg->x_n_bbs_in_dom_tree)
+#define VALUE_HISTOGRAMS(fun) (fun)->value_histograms
/* Given a function decl for a containing function,
return the `struct function' for it. */
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);
#ifdef RTX_CODE
extern void diddle_return_value (void (*)(rtx, void*), void*);
extern void clobber_return_register (void);
-extern void use_return_register (void);
#endif
extern rtx get_arg_pointer_save_area (struct function *);
-extern void init_virtual_regs (struct emit_status *);
-extern void instantiate_virtual_regs (void);
-
/* Returns the name of the current function. */
extern const char *current_function_name (void);
-
-/* Called once, at initialization, to initialize function.c. */
-extern void init_function_once (void);
+/* Returns the assembler name (raw, mangled) of the current function. */
+extern const char *current_function_assembler_name (void);
extern void do_warn_unused_parameter (tree);
extern bool reference_callee_copied (CUMULATIVE_ARGS *, enum machine_mode,
tree, bool);
+extern void used_types_insert (tree);
+
+extern int get_next_funcdef_no (void);
#endif /* GCC_FUNCTION_H */
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