/* 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.
};
-/* Indexed by pseudo register number, gives the rtx for that pseudo.
- Allocated in parallel with regno_pointer_align.
- FIXME: We could put it into emit_status struct, but gengtype is not able to deal
- with length attribute nested in top level structures. */
+/* Indexed by register number, gives an rtx for that register (and only
+ that register). For pseudo registers, it is the unique rtx for
+ that pseudo. For hard registers, it is an rtx of the mode specified
+ by reg_raw_mode.
+
+ FIXME: We could put it into emit_status struct, but gengtype is not
+ able to deal with length attribute nested in top level structures. */
extern GTY ((length ("crtl->emit.x_reg_rtx_no"))) rtx * regno_reg_rtx;
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);
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;
};
/* Describe an empty area of space in the stack frame. These can be chained
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
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;
/* 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;
/* 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;
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 *);