/* Structure for saving state for a nested function.
Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ 1999, 2000, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
This file is part of GCC.
#include "tree.h"
#include "hashtab.h"
#include "vecprim.h"
+#include "tm.h" /* For CUMULATIVE_ARGS. */
+#include "hard-reg-set.h"
/* Stack of pending (incomplete) sequences saved by `start_sequence'.
Each element describes one pending sequence.
struct temp_slot;
typedef struct temp_slot *temp_slot_p;
struct call_site_record_d;
+struct dw_fde_struct;
DEF_VEC_P(temp_slot_p);
DEF_VEC_ALLOC_P(temp_slot_p,gc);
DEF_VEC_P(ipa_opt_pass);
DEF_VEC_ALLOC_P(ipa_opt_pass,heap);
-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
-};
-
struct GTY(()) varasm_status {
/* If we're using a per-function constant pool, this is it. */
struct rtx_constant_pool *pool;
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. */
+/* Describe an empty area of space in the stack frame. These can be chained
+ into a list; this is used to keep track of space wasted for alignment
+ reasons. */
+struct GTY(()) frame_space
+{
+ struct frame_space *next;
- const char *unlikely_text_section_name;
+ HOST_WIDE_INT start;
+ HOST_WIDE_INT length;
};
/* Datastructures maintained for currently processed function in RTL form. */
Made for the sake of unshare_all_rtl. */
rtx x_stack_slot_list;
+ /* List of empty areas in the stack frame. */
+ struct frame_space *frame_space_list;
+
/* Place after which to insert the tail_recursion_label if we need one. */
rtx x_stack_check_probe_note;
TREE_NOTHROW (current_function_decl) it is set even for overwritable
function where currently compiled version of it is nothrow. */
bool nothrow;
+
+ /* True if we performed shrink-wrapping for the current function. */
+ bool shrink_wrapped;
+
+ /* Like regs_ever_live, but 1 if a reg is set or clobbered from an
+ asm. Unlike regs_ever_live, elements of this array corresponding
+ to eliminable regs (like the frame pointer) are set if an asm
+ sets them. */
+ HARD_REG_SET asm_clobbers;
};
#define return_label (crtl->x_return_label)
want to do differently. */
#define crtl (&x_rtl)
+struct GTY(()) stack_usage
+{
+ /* # of bytes of static stack space allocated by the function. */
+ HOST_WIDE_INT static_stack_size;
+
+ /* # of bytes of dynamic stack space allocated by the function. This is
+ meaningful only if has_unbounded_dynamic_stack_size is zero. */
+ HOST_WIDE_INT dynamic_stack_size;
+
+ /* # of bytes of space pushed onto the stack after the prologue. If
+ !ACCUMULATE_OUTGOING_ARGS, it contains the outgoing arguments. */
+ int pushed_stack_size;
+
+ /* Nonzero if the amount of stack space allocated dynamically cannot
+ be bounded at compile-time. */
+ unsigned int has_unbounded_dynamic_stack_size : 1;
+};
+
+#define current_function_static_stack_size (cfun->su->static_stack_size)
+#define current_function_dynamic_stack_size (cfun->su->dynamic_stack_size)
+#define current_function_pushed_stack_size (cfun->su->pushed_stack_size)
+#define current_function_has_unbounded_dynamic_stack_size \
+ (cfun->su->has_unbounded_dynamic_stack_size)
+#define current_function_allocates_dynamic_stack_space \
+ (current_function_dynamic_stack_size != 0 \
+ || current_function_has_unbounded_dynamic_stack_size)
+
/* This structure can save all the important global and static variables
describing the status of the current function. */
/* The loops in this function. */
struct loops *x_current_loops;
+ /* The stack usage of this function. */
+ struct stack_usage *su;
+
/* Value histograms attached to particular statements. */
htab_t GTY((skip)) value_histograms;
pointer. */
tree nonlocal_goto_save_area;
- /* List of function local variables, functions, types and constants. */
- tree local_decls;
+ /* Vector of function local variables, functions, types and constants. */
+ VEC(tree,gc) *local_decls;
/* For md files. */
/* Used types hash table. */
htab_t GTY ((param_is (union tree_node))) used_types_hash;
+ /* Dwarf2 Frame Description Entry, containing the Call Frame Instructions
+ used for unwinding. Only set when either dwarf2 unwinding or dwarf2
+ debugging is enabled. */
+ struct dw_fde_struct *fde;
+
/* Last statement uid. */
int last_stmt_uid;
function. */
unsigned int va_list_fpr_size : 8;
- /* 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;
/* 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 dont_save_pending_sizes_p : 1;
-
unsigned int after_inlining : 1;
unsigned int always_inline_functions_inlined : 1;
+ /* Nonzero if function being compiled can throw synchronous non-call
+ exceptions. */
+ unsigned int can_throw_non_call_exceptions : 1;
+
/* Fields below this point are not set for abstract functions; see
allocate_struct_function. */
unsigned int is_thunk : 1;
};
+/* Add the decl D to the local_decls list of FUN. */
+
+static inline void
+add_local_decl (struct function *fun, tree d)
+{
+ VEC_safe_push (tree, gc, fun->local_decls, d);
+}
+
+#define FOR_EACH_LOCAL_DECL(FUN, I, D) \
+ FOR_EACH_VEC_ELT_REVERSE (tree, (FUN)->local_decls, I, D)
+
/* 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
int types_used_by_vars_eq (const void *, const void *);
void types_used_by_var_decl_insert (tree type, tree var_decl);
-/* During parsing of a global variable, this linked list points to
- the list of types referenced by the global variable. */
-extern GTY(()) tree types_used_by_cur_var_decl;
+/* During parsing of a global variable, this vector contains the types
+ referenced by the global variable. */
+extern GTY(()) VEC(tree,gc) *types_used_by_cur_var_decl;
/* cfun shouldn't be set directly; use one of these functions instead. */
extern void clear_block_marks (tree);
extern tree blocks_nreverse (tree);
+extern tree block_chainon (tree, tree);
/* Return size needed for stack frame based on slots so far allocated.
This size counts from zero. It is not rounded to STACK_BOUNDARY;
extern void used_types_insert (tree);
extern int get_next_funcdef_no (void);
+extern int get_last_funcdef_no (void);
+
+#ifdef HAVE_simple_return
+extern bool requires_stack_frame_p (rtx, HARD_REG_SET, HARD_REG_SET);
+#endif
+
+/* In predict.c */
+extern bool optimize_function_for_size_p (struct function *);
+extern bool optimize_function_for_speed_p (struct function *);
+
#endif /* GCC_FUNCTION_H */
OSDN Git Service
