/* 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, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#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,
rtx last;
struct sequence_stack *next;
};
-
-/* Stack of single obstacks. */
-
-struct simple_obstack_stack
-{
- struct obstack *obstack;
- struct simple_obstack_stack *next;
-};
\f
struct emit_status GTY(())
{
struct gimple_df *gimple_df;
/* The loops in this function. */
- struct loops * GTY((skip)) x_current_loops;
+ struct loops *x_current_loops;
/* Value histograms attached to particular statements. */
htab_t GTY((skip)) value_histograms;
/* 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;
/* 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. */
/* 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;
/* 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;
/* 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;
-
/* 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 gimplified : 1;
+ 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_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 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,
/* Returns the name of the current function. */
extern const char *current_function_name (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);
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