/* Structure for saving state for a nested function.
Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2003, 2004 Free Software Foundation, Inc.
+ 1999, 2000, 2003, 2004, 2005, 2006, 2007, 2008
+ 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"
+#include "varray.h"
/* Stack of pending (incomplete) sequences saved by `start_sequence'.
Each element describes one pending sequence.
/* First and last insns in the chain of the saved sequence. */
rtx first;
rtx last;
- tree sequence_rtl_expr;
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(())
{
/* The ends of the doubly-linked chain of rtl for the current function.
Both are reset to null at the start of rtl generation for the function.
- start_sequence saves both of these on `sequence_stack' along with
- `sequence_rtl_expr' and then starts a new, nested sequence of insns. */
+ start_sequence saves both of these on `sequence_stack' and then starts
+ a new, nested sequence of insns. */
rtx x_first_insn;
rtx x_last_insn;
- /* RTL_EXPR within which the current sequence will be placed. Use to
- prevent reuse of any temporaries within the sequence until after the
- RTL_EXPR is emitted. */
- tree sequence_rtl_expr;
-
/* 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,
/* Indexed by pseudo register number, if nonzero gives the known alignment
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.x_reg_rtx_no")))
- regno_pointer_align;
+ unsigned char * GTY((skip)) regno_pointer_align;
+};
- /* Indexed by pseudo register number, gives the rtx for that pseudo.
- 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.x_reg_rtx_no"))) x_regno_reg_rtx;
-};
+/* 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. */
+
+extern GTY ((length ("crtl->emit.x_reg_rtx_no"))) rtx * regno_reg_rtx;
/* For backward compatibility... eventually these should all go away. */
-#define reg_rtx_no (cfun->emit->x_reg_rtx_no)
-#define seq_rtl_expr (cfun->emit->sequence_rtl_expr)
-#define regno_reg_rtx (cfun->emit->x_regno_reg_rtx)
-#define seq_stack (cfun->emit->sequence_stack)
+#define reg_rtx_no (crtl->emit.x_reg_rtx_no)
+#define seq_stack (crtl->emit.sequence_stack)
-#define REGNO_POINTER_ALIGN(REGNO) (cfun->emit->regno_pointer_align[REGNO])
+#define REGNO_POINTER_ALIGN(REGNO) (crtl->emit.regno_pointer_align[REGNO])
struct expr_status GTY(())
{
/* List of labels that must never be deleted. */
rtx x_forced_labels;
-
- /* Postincrements that still need to be expanded. */
- rtx x_pending_chain;
};
-#define pending_stack_adjust (cfun->expr->x_pending_stack_adjust)
-#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)
+typedef struct call_site_record *call_site_record;
+DEF_VEC_P(call_site_record);
+DEF_VEC_ALLOC_P(call_site_record, gc);
-/* This structure can save all the important global and static variables
- describing the status of the current function. */
-
-struct function GTY(())
+/* RTL representation of exception handling. */
+struct rtl_eh GTY(())
{
- struct eh_status *eh;
- struct stmt_status *stmt;
- struct expr_status *expr;
- struct emit_status *emit;
- struct varasm_status *varasm;
+ rtx filter;
+ rtx exc_ptr;
- /* For tree-optimize.c. */
+ int built_landing_pads;
- /* Saved tree and arguments during tree optimization. Used later for
- inlining */
- tree saved_tree;
- tree saved_args;
+ rtx ehr_stackadj;
+ rtx ehr_handler;
+ rtx ehr_label;
- /* For function.c. */
+ rtx sjlj_fc;
+ rtx sjlj_exit_after;
- /* Points to the FUNCTION_DECL of this function. */
- tree decl;
+ htab_t GTY ((param_is (struct ehl_map_entry))) exception_handler_label_map;
- /* Function containing this function, if any. */
- struct function *outer;
+ VEC(tree,gc) *ttype_data;
+ varray_type ehspec_data;
+ varray_type action_record_data;
+
+ VEC(call_site_record,gc) *call_site_record;
+};
+
+#define pending_stack_adjust (crtl->expr.x_pending_stack_adjust)
+#define inhibit_defer_pop (crtl->expr.x_inhibit_defer_pop)
+#define saveregs_value (crtl->expr.x_saveregs_value)
+#define apply_args_value (crtl->expr.x_apply_args_value)
+#define forced_labels (crtl->expr.x_forced_labels)
+#define stack_pointer_delta (crtl->expr.x_stack_pointer_delta)
+
+struct gimple_df;
+struct temp_slot;
+typedef struct temp_slot *temp_slot_p;
+struct call_site_record;
+
+DEF_VEC_P(temp_slot_p);
+DEF_VEC_ALLOC_P(temp_slot_p,gc);
+struct ipa_opt_pass;
+typedef struct ipa_opt_pass *ipa_opt_pass;
+
+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 varasm_status GTY(())
+{
+ /* If we're using a per-function constant pool, this is it. */
+ struct rtx_constant_pool *pool;
+ /* Number of tree-constants deferred during the expansion of this
+ function. */
+ unsigned int deferred_constants;
+};
+
+/* Information mainlined about RTL representation of incoming arguments. */
+struct incoming_args GTY(())
+{
/* 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. */
/* 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. */
- int args_size;
+ int size;
/* # bytes the prologue should push and pretend that the caller pushed them.
The prologue must do this, but only if parms can be passed in
registers. */
int pretend_args_size;
- /* # of bytes of outgoing arguments. If ACCUMULATE_OUTGOING_ARGS is
- defined, the needed space is pushed by the prologue. */
- int outgoing_args_size;
-
/* This is the offset from the arg pointer to the place where the first
anonymous arg can be found, if there is one. */
rtx arg_offset_rtx;
/* Quantities of various kinds of registers
used for the current function's args. */
- CUMULATIVE_ARGS args_info;
+ CUMULATIVE_ARGS info;
+
+ /* The arg pointer hard register, or the pseudo into which it was copied. */
+ rtx internal_arg_pointer;
+};
+
+/* Data for function partitioning. */
+struct function_subsections GTY(())
+{
+ /* Assembly labels for the hot and cold text sections, to
+ 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;
+
+ /* String to be used for name of cold text sections, via
+ targetm.asm_out.named_section. */
+
+ const char *unlikely_text_section_name;
+};
+
+/* Datastructures maintained for currently processed function in RTL form. */
+struct rtl_data GTY(())
+{
+ struct expr_status expr;
+ struct emit_status emit;
+ struct varasm_status varasm;
+ struct incoming_args args;
+ struct function_subsections subsections;
+ struct rtl_eh eh;
+
+ /* For function.c */
+
+ /* # of bytes of outgoing arguments. If ACCUMULATE_OUTGOING_ARGS is
+ defined, the needed space is pushed by the prologue. */
+ int outgoing_args_size;
/* If nonzero, an RTL expression for the location at which the current
function returns its result. If the current function returns its
the hard register containing the result. */
rtx return_rtx;
- /* The arg pointer hard register, or the pseudo into which it was copied. */
- rtx internal_arg_pointer;
-
- /* Language-specific reason why the current function cannot be made
- inline. */
- const char *cannot_inline;
-
/* 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;
-
- /* 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. */
- tree x_nonlocal_labels;
-
- /* List (chain of EXPR_LIST) of stack slots that hold the current handlers
- for nonlocal gotos. There is one for every nonlocal label in the
- function; this list matches the one in nonlocal_labels.
- Zero when function does not have nonlocal labels. */
- rtx x_nonlocal_goto_handler_slots;
+ /* A variable living at the top of the frame that holds a known value.
+ Used for detecting stack clobbers. */
+ tree stack_protect_guard;
/* List (chain of EXPR_LIST) of labels heading the current handlers for
nonlocal gotos. */
rtx x_nonlocal_goto_handler_labels;
- /* RTX for stack slot that holds the stack pointer value to restore
- for a nonlocal goto.
- Zero when function does not have nonlocal labels. */
- rtx x_nonlocal_goto_stack_level;
-
- /* Label that will go on parm cleanup code, if any.
- Jumping to this label runs cleanup code for parameters, if
- such code must be run. Following this code is the logical return
- label. */
- rtx x_cleanup_label;
-
/* Label that will go on function epilogue.
Jumping to this label serves as a "return" instruction
on machines which require execution of the epilogue on all returns. */
on machines which require execution of the epilogue on all returns. */
rtx x_naked_return_label;
- /* Label and register for unswitching computed gotos. */
- rtx computed_goto_common_label;
- rtx computed_goto_common_reg;
-
- /* List (chain of EXPR_LISTs) of pseudo-regs of SAVE_EXPRs.
- So we can mark them all live at the end of the function, if nonopt. */
- rtx x_save_expr_regs;
-
/* List (chain of EXPR_LISTs) of all stack slots in this function.
Made for the sake of unshare_all_rtl. */
rtx x_stack_slot_list;
- /* Chain of all RTL_EXPRs that have insns in them. */
- tree x_rtl_expr_chain;
-
- /* Label to jump back to for tail recursion, or 0 if we have
- not yet needed one for this function. */
- rtx x_tail_recursion_label;
-
/* 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
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. */
HOST_WIDE_INT x_frame_offset;
- /* List (chain of TREE_LISTs) of static chains for containing functions.
- Each link has a FUNCTION_DECL in the TREE_PURPOSE and a reg rtx
- in an RTL_EXPR in the TREE_VALUE. */
- tree x_context_display;
+ /* Insn after which register parms and SAVE_EXPRs are born, if nonopt. */
+ rtx x_parm_birth_insn;
- /* List (chain of TREE_LISTs) of trampolines for nested functions.
- The trampoline sets up the static chain and jumps to the function.
- We supply the trampoline's address when the function's address is
- requested.
+ /* List of all used temporaries allocated, by level. */
+ VEC(temp_slot_p,gc) *x_used_temp_slots;
- Each link has a FUNCTION_DECL in the TREE_PURPOSE and a reg rtx
- in an RTL_EXPR in the TREE_VALUE. */
- tree x_trampoline_list;
+ /* List of available temp slots. */
+ struct temp_slot *x_avail_temp_slots;
- /* Insn after which register parms and SAVE_EXPRs are born, if nonopt. */
- rtx x_parm_birth_insn;
+ /* Current nesting level for temporaries. */
+ int x_temp_slot_level;
+
+ /* 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;
- /* Last insn of those whose job was to put parms into their nominal
- homes. */
- rtx x_last_parm_insn;
+ /* For reorg. */
- /* 1 + last pseudo register number possibly used for loading a copy
- of a parameter of this function. */
- unsigned int x_max_parm_reg;
+ /* 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;
- /* 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 * GTY ((length ("%h.x_max_parm_reg"))) x_parm_reg_stack_loc;
+ /* Nonzero if function being compiled called builtin_return_addr or
+ builtin_frame_address with nonzero count. */
+ bool accesses_prior_frames;
- /* List of all temporaries allocated, both available and in use. */
- struct temp_slot *x_temp_slots;
+ /* Nonzero if the function calls __builtin_eh_return. */
+ bool calls_eh_return;
- /* Current nesting level for temporaries. */
- int x_temp_slot_level;
+ /* Nonzero if function saves all registers, e.g. if it has a nonlocal
+ label that can reach the exit block via non-exceptional paths. */
+ bool saves_all_registers;
+
+ /* Nonzero if function being compiled has nonlocal gotos to parent
+ function. */
+ bool has_nonlocal_goto;
+
+ /* Nonzero if function being compiled has an asm statement. */
+ bool has_asm_statement;
+
+ /* Nonzero if the current function is a thunk, i.e., a lightweight
+ function implemented by the output_mi_thunk hook) that just
+ adjusts one of its arguments and forwards to another
+ function. */
+ bool is_thunk;
+
+ /* 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. */
+ bool all_throwers_are_sibcalls;
+
+ /* Nonzero if stack limit checking should be enabled in the current
+ function. */
+ bool limit_stack;
- /* Current nesting level for variables in a block. */
- int x_var_temp_slot_level;
-
- /* When temporaries are created by TARGET_EXPRs, they are created at
- this level of temp_slot_level, so that they can remain allocated
- until no longer needed. CLEANUP_POINT_EXPRs define the lifetime
- of TARGET_EXPRs. */
- int x_target_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;
- /* Last insn of those whose job was to put parms into their nominal
- homes. */
- rtx inl_last_parm_insn;
- /* Highest label number in current function. */
- int inl_max_label_num;
+ /* Nonzero if profiling code should be generated. */
+ bool profile;
+
+ /* Nonzero if the current function uses the constant pool. */
+ bool uses_const_pool;
+
+ /* Nonzero if the current function uses pic_offset_table_rtx. */
+ bool uses_pic_offset_table;
+
+ /* Nonzero if the current function needs an lsda for exception handling. */
+ bool uses_eh_lsda;
+
+ /* Set when the tail call has been produced. */
+ bool tail_call_emit;
+
+ /* Nonzero if code to initialize arg_pointer_save_area has been emitted. */
+ bool arg_pointer_save_area_init;
+
+ /* Nonzero means current function must be given a frame pointer.
+ Set in stmt.c if anything is allocated on the stack there.
+ Set in reload1.c if anything is allocated on the stack there. */
+ bool frame_pointer_needed;
+};
+
+#define return_label (crtl->x_return_label)
+#define naked_return_label (crtl->x_naked_return_label)
+#define stack_slot_list (crtl->x_stack_slot_list)
+#define parm_birth_insn (crtl->x_parm_birth_insn)
+#define frame_offset (crtl->x_frame_offset)
+#define stack_check_probe_note (crtl->x_stack_check_probe_note)
+#define arg_pointer_save_area (crtl->x_arg_pointer_save_area)
+#define used_temp_slots (crtl->x_used_temp_slots)
+#define avail_temp_slots (crtl->x_avail_temp_slots)
+#define temp_slot_level (crtl->x_temp_slot_level)
+#define nonlocal_goto_handler_labels (crtl->x_nonlocal_goto_handler_labels)
+#define frame_pointer_needed (crtl->frame_pointer_needed)
+
+extern GTY(()) struct rtl_data x_rtl;
+
+/* Accestor to RTL datastructures. We keep them statically allocated now since
+ we never keep multiple functions. For threaded compiler we might however
+ want to do differntly. */
+#define crtl (&x_rtl)
+
+/* This structure can save all the important global and static variables
+ describing the status of the current function. */
+
+struct function GTY(())
+{
+ struct eh_status *eh;
+
+ /* The control flow graph for this function. */
+ struct control_flow_graph *cfg;
+ /* SSA and dataflow information. */
+ struct gimple_df *gimple_df;
+
+ /* The loops in this function. */
+ struct loops *x_current_loops;
+
+ /* Value histograms attached to particular statements. */
+ htab_t GTY((skip)) value_histograms;
+
+ /* For function.c. */
+
+ /* Points to the FUNCTION_DECL of this function. */
+ tree decl;
+
+ /* Function containing this function, if any. */
+ struct function *outer;
+
+ /* A PARM_DECL that should contain the static chain for this function.
+ It will be initialized at the beginning of the function. */
+ tree static_chain_decl;
+
+ /* An expression that contains the non-local goto save area. The first
+ word is the saved frame pointer and the second is the saved stack
+ pointer. */
+ tree nonlocal_goto_save_area;
/* Function sequence number for profiling, debugging, etc. */
int funcdef_no;
+ /* List of function local variables, functions, types and constants. */
+ tree local_decls;
+
/* 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. */
- int stack_alignment_needed;
- /* Preferred alignment of the end of stack frame. */
- int preferred_stack_boundary;
- /* Set when the call to function itself has been emit. */
- bool recursive_call_emit;
/* Language-specific code can use this to store whatever it likes. */
struct language_function * language;
- /* For reorg. */
+ /* Used types hash table. */
+ htab_t GTY ((param_is (union tree_node))) used_types_hash;
- /* 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;
+ /* Last statement uid. */
+ int last_stmt_uid;
- /* 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;
+
+ /* Properties used by the pass manager. */
+ unsigned int curr_properties;
+ unsigned int last_verified;
+ /* Interprocedural passes scheduled to have their transform functions
+ applied next time we execute local pass on them. We maintain it
+ per-function in order to allow IPA passes to introduce new functions. */
+ VEC(ipa_opt_pass,heap) * GTY((skip)) ipa_transforms_to_apply;
/* 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;
- /* Nonzero if function being compiled needs to be passed a static chain. */
- unsigned int needs_context : 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 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 the function calls __builtin_constant_p. */
- unsigned int calls_constant_p : 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, i.e., a lightweight
- function implemented by the output_mi_thunk hook) that just
- adjusts one of its arguments and forwards to another
- function. */
- 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 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
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;
+ unsigned int dont_save_pending_sizes_p : 1;
- /* Nonzero if the current function uses the constant pool. */
- unsigned int uses_const_pool : 1;
+ unsigned int after_inlining : 1;
- /* Nonzero if the current function uses pic_offset_table_rtx. */
- unsigned int uses_pic_offset_table : 1;
+ /* Fields below this point are not set for abstract functions; see
+ allocate_struct_function. */
- /* 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 emitted. */
- unsigned int arg_pointer_save_area_init : 1;
+ /* Nonzero if function being compiled needs to be given an address
+ where the value should be stored. */
+ unsigned int returns_struct : 1;
- /* Flag for use by ther rtl inliner, to tell if the function has been
- processed at least once. */
- unsigned int rtl_inline_init : 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 rtl inliner has saved the function for inlining. */
- unsigned int saved_for_inline : 1;
+ /* Nonzero if pass_tree_profile was run on this function. */
+ unsigned int after_tree_profile : 1;
};
+/* 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
+#define VA_LIST_MAX_FPR_SIZE 255
+
/* 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);
+extern void instantiate_decl_rtl (rtx x);
+
/* 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_needs_context (cfun->needs_context)
-#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_calls_constant_p (cfun->calls_constant_p)
-#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_args_info (cfun->args_info)
-#define current_function_args_size (cfun->args_size)
-#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_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_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)
-#define current_function_cannot_inline (cfun->cannot_inline)
-#define current_function_epilogue_delay_list (cfun->epilogue_delay_list)
-#define current_function_has_nonlocal_label (cfun->has_nonlocal_label)
-#define current_function_has_nonlocal_goto (cfun->has_nonlocal_goto)
-
-#define max_parm_reg (cfun->x_max_parm_reg)
-#define parm_reg_stack_loc (cfun->x_parm_reg_stack_loc)
-#define cleanup_label (cfun->x_cleanup_label)
-#define return_label (cfun->x_return_label)
-#define naked_return_label (cfun->x_naked_return_label)
-#define save_expr_regs (cfun->x_save_expr_regs)
-#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_label (cfun->x_tail_recursion_label)
-#define tail_recursion_reentry (cfun->x_tail_recursion_reentry)
-#define arg_pointer_save_area (cfun->x_arg_pointer_save_area)
-#define rtl_expr_chain (cfun->x_rtl_expr_chain)
-#define last_parm_insn (cfun->x_last_parm_insn)
-#define context_display (cfun->x_context_display)
-#define trampoline_list (cfun->x_trampoline_list)
-#define function_call_count (cfun->x_function_call_count)
-#define temp_slots (cfun->x_temp_slots)
-#define temp_slot_level (cfun->x_temp_slot_level)
-#define target_temp_slot_level (cfun->x_target_temp_slot_level)
-#define var_temp_slot_level (cfun->x_var_temp_slot_level)
-#define nonlocal_labels (cfun->x_nonlocal_labels)
-#define nonlocal_goto_handler_slots (cfun->x_nonlocal_goto_handler_slots)
-#define nonlocal_goto_handler_labels (cfun->x_nonlocal_goto_handler_labels)
-#define nonlocal_goto_stack_level (cfun->x_nonlocal_goto_stack_level)
-
-/* The FUNCTION_DECL for an inline function currently being expanded. */
-extern tree inline_function_decl;
+
+#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. */
struct function *find_function_data (tree);
-/* Set NOTE_BLOCK for each block note in the current function. */
-extern void identify_blocks (void);
-
/* Identify BLOCKs referenced by more than one NOTE_INSN_BLOCK_{BEG,END},
and create duplicate blocks. */
extern void reorder_blocks (void);
/* Set BLOCK_NUMBER for all the blocks in FN. */
extern void number_blocks (tree);
+extern void clear_block_marks (tree);
+extern tree blocks_nreverse (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;
the caller may have to do that. */
extern HOST_WIDE_INT get_frame_size (void);
-/* Likewise, but for a different than the current function. */
-extern HOST_WIDE_INT get_func_frame_size (struct function *);
+
+/* 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);
/* Save and restore status information for a nested function. */
-extern void restore_emit_status (struct function *);
extern void free_after_parsing (struct function *);
extern void free_after_compilation (struct function *);
-extern void init_varasm_status (struct function *);
+extern void init_varasm_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 rtx get_arg_pointer_save_area (void);
/* 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);
+
+extern bool pass_by_reference (CUMULATIVE_ARGS *, enum machine_mode,
+ tree, bool);
+extern bool reference_callee_copied (CUMULATIVE_ARGS *, enum machine_mode,
+ tree, bool);
-/* Called once, at initialization, to initialize function.c. */
-extern void init_function_once (void);
+extern void used_types_insert (tree);
+extern int get_next_funcdef_no (void);
#endif /* GCC_FUNCTION_H */
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