/* Expands front end tree to back end RTL for GCC.
Copyright (C) 1987, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
+ 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
Free Software Foundation, Inc.
This file is part of GCC.
#include "target.h"
#include "cfglayout.h"
#include "tree-gimple.h"
+#include "tree-pass.h"
+#include "predict.h"
+#include "vecprim.h"
#ifndef LOCAL_ALIGNMENT
#define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
/* The currently compiled function. */
struct function *cfun = 0;
-DEF_VEC_I(int);
-DEF_VEC_ALLOC_I(int,heap);
-
/* These arrays record the INSN_UIDs of the prologue and epilogue insns. */
static VEC(int,heap) *prologue;
static VEC(int,heap) *epilogue;
static void pad_to_arg_alignment (struct args_size *, int, struct args_size *);
static void pad_below (struct args_size *, enum machine_mode, tree);
static void reorder_blocks_1 (rtx, tree, VEC(tree,heap) **);
-static void reorder_fix_fragments (tree);
static int all_blocks (tree, tree *);
static tree *get_block_vector (tree, int *);
extern tree debug_find_var_in_block_tree (tree, tree);
static void record_insns (rtx, VEC(int,heap) **) ATTRIBUTE_UNUSED;
static int contains (rtx, VEC(int,heap) **);
#ifdef HAVE_return
-static void emit_return_into_block (basic_block, rtx);
+static void emit_return_into_block (basic_block);
#endif
#if defined(HAVE_epilogue) && defined(INCOMING_RETURN_ADDR_RTX)
static rtx keep_stack_depressed (rtx);
f->x_return_label = NULL;
f->x_naked_return_label = NULL;
f->x_stack_slot_list = NULL;
- f->x_tail_recursion_reentry = NULL;
+ f->x_stack_check_probe_note = NULL;
f->x_arg_pointer_save_area = NULL;
f->x_parm_birth_insn = NULL;
- f->original_arg_vector = NULL;
- f->original_decl_initial = NULL;
f->epilogue_delay_list = NULL;
}
\f
static HOST_WIDE_INT
get_func_frame_size (struct function *f)
{
-#ifdef FRAME_GROWS_DOWNWARD
- return -f->x_frame_offset;
-#else
- return f->x_frame_offset;
-#endif
+ if (FRAME_GROWS_DOWNWARD)
+ return -f->x_frame_offset;
+ else
+ return f->x_frame_offset;
}
/* Return size needed for stack frame based on slots so far allocated.
This size counts from zero. It is not rounded to PREFERRED_STACK_BOUNDARY;
the caller may have to do that. */
+
HOST_WIDE_INT
get_frame_size (void)
{
return get_func_frame_size (cfun);
}
+/* Issue an error message and return TRUE if frame OFFSET overflows in
+ the signed target pointer arithmetics for function FUNC. Otherwise
+ return FALSE. */
+
+bool
+frame_offset_overflow (HOST_WIDE_INT offset, tree func)
+{
+ unsigned HOST_WIDE_INT size = FRAME_GROWS_DOWNWARD ? -offset : offset;
+
+ if (size > ((unsigned HOST_WIDE_INT) 1 << (GET_MODE_BITSIZE (Pmode) - 1))
+ /* Leave room for the fixed part of the frame. */
+ - 64 * UNITS_PER_WORD)
+ {
+ error ("%Jtotal size of local objects too large", func);
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
/* Allocate a stack slot of SIZE bytes and return a MEM rtx for it
with machine mode MODE.
else
alignment = align / BITS_PER_UNIT;
-#ifdef FRAME_GROWS_DOWNWARD
- function->x_frame_offset -= size;
-#endif
+ if (FRAME_GROWS_DOWNWARD)
+ function->x_frame_offset -= size;
/* Ignore alignment we can't do with expected alignment of the boundary. */
if (alignment * BITS_PER_UNIT > PREFERRED_STACK_BOUNDARY)
division with a negative dividend isn't as well defined as we might
like. So we instead assume that ALIGNMENT is a power of two and
use logical operations which are unambiguous. */
-#ifdef FRAME_GROWS_DOWNWARD
- function->x_frame_offset
- = (FLOOR_ROUND (function->x_frame_offset - frame_phase,
- (unsigned HOST_WIDE_INT) alignment)
- + frame_phase);
-#else
- function->x_frame_offset
- = (CEIL_ROUND (function->x_frame_offset - frame_phase,
- (unsigned HOST_WIDE_INT) alignment)
- + frame_phase);
-#endif
+ if (FRAME_GROWS_DOWNWARD)
+ function->x_frame_offset
+ = (FLOOR_ROUND (function->x_frame_offset - frame_phase,
+ (unsigned HOST_WIDE_INT) alignment)
+ + frame_phase);
+ else
+ function->x_frame_offset
+ = (CEIL_ROUND (function->x_frame_offset - frame_phase,
+ (unsigned HOST_WIDE_INT) alignment)
+ + frame_phase);
}
/* On a big-endian machine, if we are allocating more space than we will use,
use the least significant bytes of those that are allocated. */
- if (BYTES_BIG_ENDIAN && mode != BLKmode)
+ if (BYTES_BIG_ENDIAN && mode != BLKmode && GET_MODE_SIZE (mode) < size)
bigend_correction = size - GET_MODE_SIZE (mode);
/* If we have already instantiated virtual registers, return the actual
(function->x_frame_offset + bigend_correction,
Pmode));
-#ifndef FRAME_GROWS_DOWNWARD
- function->x_frame_offset += size;
-#endif
+ if (!FRAME_GROWS_DOWNWARD)
+ function->x_frame_offset += size;
x = gen_rtx_MEM (mode, addr);
+ MEM_NOTRAP_P (x) = 1;
function->x_stack_slot_list
= gen_rtx_EXPR_LIST (VOIDmode, x, function->x_stack_slot_list);
+ if (frame_offset_overflow (function->x_frame_offset, function->decl))
+ function->x_frame_offset = 0;
+
return x;
}
static struct temp_slot **
temp_slots_at_level (int level)
{
+ if (level >= (int) VEC_length (temp_slot_p, used_temp_slots))
+ {
+ size_t old_length = VEC_length (temp_slot_p, used_temp_slots);
+ temp_slot_p *p;
- if (!used_temp_slots)
- VARRAY_GENERIC_PTR_INIT (used_temp_slots, 3, "used_temp_slots");
-
- while (level >= (int) VARRAY_ACTIVE_SIZE (used_temp_slots))
- VARRAY_PUSH_GENERIC_PTR (used_temp_slots, NULL);
+ VEC_safe_grow (temp_slot_p, gc, used_temp_slots, level + 1);
+ p = VEC_address (temp_slot_p, used_temp_slots);
+ memset (&p[old_length], 0,
+ sizeof (temp_slot_p) * (level + 1 - old_length));
+ }
- return (struct temp_slot **) &VARRAY_GENERIC_PTR (used_temp_slots, level);
+ return &(VEC_address (temp_slot_p, used_temp_slots)[level]);
}
/* Returns the maximal temporary slot level. */
if (!used_temp_slots)
return -1;
- return VARRAY_ACTIVE_SIZE (used_temp_slots) - 1;
+ return VEC_length (temp_slot_p, used_temp_slots) - 1;
}
/* Moves temporary slot TEMP to LEVEL. */
/* Try to find an available, already-allocated temporary of the proper
mode which meets the size and alignment requirements. Choose the
- smallest one with the closest alignment. */
- for (p = avail_temp_slots; p; p = p->next)
+ smallest one with the closest alignment.
+
+ If assign_stack_temp is called outside of the tree->rtl expansion,
+ we cannot reuse the stack slots (that may still refer to
+ VIRTUAL_STACK_VARS_REGNUM). */
+ if (!virtuals_instantiated)
{
- if (p->align >= align && p->size >= size && GET_MODE (p->slot) == mode
- && objects_must_conflict_p (p->type, type)
- && (best_p == 0 || best_p->size > p->size
- || (best_p->size == p->size && best_p->align > p->align)))
+ for (p = avail_temp_slots; p; p = p->next)
{
- if (p->align == align && p->size == size)
+ if (p->align >= align && p->size >= size
+ && GET_MODE (p->slot) == mode
+ && objects_must_conflict_p (p->type, type)
+ && (best_p == 0 || best_p->size > p->size
+ || (best_p->size == p->size && best_p->align > p->align)))
{
- selected = p;
- cut_slot_from_list (selected, &avail_temp_slots);
- best_p = 0;
- break;
+ if (p->align == align && p->size == size)
+ {
+ selected = p;
+ cut_slot_from_list (selected, &avail_temp_slots);
+ best_p = 0;
+ break;
+ }
+ best_p = p;
}
- best_p = p;
}
}
p->size = best_p->size - rounded_size;
p->base_offset = best_p->base_offset + rounded_size;
p->full_size = best_p->full_size - rounded_size;
- p->slot = gen_rtx_MEM (BLKmode,
- plus_constant (XEXP (best_p->slot, 0),
- rounded_size));
+ p->slot = adjust_address_nv (best_p->slot, BLKmode, rounded_size);
p->align = best_p->align;
p->address = 0;
p->type = best_p->type;
can be either above or below this stack slot depending on which
way the frame grows. We include the extra space if and only if it
is above this slot. */
-#ifdef FRAME_GROWS_DOWNWARD
- p->size = frame_offset_old - frame_offset;
-#else
- p->size = size;
-#endif
+ if (FRAME_GROWS_DOWNWARD)
+ p->size = frame_offset_old - frame_offset;
+ else
+ p->size = size;
/* Now define the fields used by combine_temp_slots. */
-#ifdef FRAME_GROWS_DOWNWARD
- p->base_offset = frame_offset;
- p->full_size = frame_offset_old - frame_offset;
-#else
- p->base_offset = frame_offset_old;
- p->full_size = frame_offset - frame_offset_old;
-#endif
+ if (FRAME_GROWS_DOWNWARD)
+ {
+ p->base_offset = frame_offset;
+ p->full_size = frame_offset_old - frame_offset;
+ }
+ else
+ {
+ p->base_offset = frame_offset_old;
+ p->full_size = frame_offset - frame_offset_old;
+ }
p->address = 0;
selected = p;
MEM_VOLATILE_P (slot) = TYPE_VOLATILE (type);
MEM_SET_IN_STRUCT_P (slot, AGGREGATE_TYPE_P (type));
}
+ MEM_NOTRAP_P (slot) = 1;
return slot;
}
if (mode == BLKmode || memory_required)
{
HOST_WIDE_INT size = int_size_in_bytes (type);
- tree size_tree;
rtx tmp;
/* Zero sized arrays are GNU C extension. Set size to 1 to avoid
size = 1;
/* Unfortunately, we don't yet know how to allocate variable-sized
- temporaries. However, sometimes we have a fixed upper limit on
- the size (which is stored in TYPE_ARRAY_MAX_SIZE) and can use that
- instead. This is the case for Chill variable-sized strings. */
- if (size == -1 && TREE_CODE (type) == ARRAY_TYPE
- && TYPE_ARRAY_MAX_SIZE (type) != NULL_TREE
- && host_integerp (TYPE_ARRAY_MAX_SIZE (type), 1))
- size = tree_low_cst (TYPE_ARRAY_MAX_SIZE (type), 1);
-
- /* If we still haven't been able to get a size, see if the language
- can compute a maximum size. */
- if (size == -1
- && (size_tree = lang_hooks.types.max_size (type)) != 0
- && host_integerp (size_tree, 1))
- size = tree_low_cst (size_tree, 1);
+ temporaries. However, sometimes we can find a fixed upper limit on
+ the size, so try that instead. */
+ else if (size == -1)
+ size = max_int_size_in_bytes (type);
/* The size of the temporary may be too large to fit into an integer. */
/* ??? Not sure this should happen except for user silliness, so limit
if (decl && size == -1
&& TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST)
{
- error ("%Jsize of variable %qD is too large", decl, decl);
+ error ("size of variable %q+D is too large", decl);
size = 1;
}
#endif
#endif
-/* On most machines, the CFA coincides with the first incoming parm. */
-
-#ifndef ARG_POINTER_CFA_OFFSET
-#define ARG_POINTER_CFA_OFFSET(FNDECL) FIRST_PARM_OFFSET (FNDECL)
-#endif
-
\f
/* Given a piece of RTX and a pointer to a HOST_WIDE_INT, if the RTX
is a virtual register, return the equivalent hard register and set the
else if (x == virtual_outgoing_args_rtx)
new = stack_pointer_rtx, offset = out_arg_offset;
else if (x == virtual_cfa_rtx)
- new = arg_pointer_rtx, offset = cfa_offset;
+ {
+#ifdef FRAME_POINTER_CFA_OFFSET
+ new = frame_pointer_rtx;
+#else
+ new = arg_pointer_rtx;
+#endif
+ offset = cfa_offset;
+ }
else
return NULL_RTX;
Validate the new value vs the insn predicate. Note that
asm insns will have insn_code -1 here. */
if (!safe_insn_predicate (insn_code, i, x))
- x = force_reg (insn_data[insn_code].operand[i].mode, x);
+ {
+ start_sequence ();
+ x = force_reg (insn_data[insn_code].operand[i].mode, x);
+ seq = get_insns ();
+ end_sequence ();
+ if (seq)
+ emit_insn_before (seq, insn);
+ }
*recog_data.operand_loc[i] = recog_data.operand[i] = x;
any_change = true;
/* Propagate operand changes into the duplicates. */
for (i = 0; i < recog_data.n_dups; ++i)
*recog_data.dup_loc[i]
- = recog_data.operand[(unsigned)recog_data.dup_num[i]];
+ = copy_rtx (recog_data.operand[(unsigned)recog_data.dup_num[i]]);
/* Force re-recognition of the instruction for validation. */
INSN_CODE (insn) = -1;
for_each_rtx (&XEXP (x, 0), instantiate_virtual_regs_in_rtx, NULL);
}
+/* Helper for instantiate_decls called via walk_tree: Process all decls
+ in the given DECL_VALUE_EXPR. */
+
+static tree
+instantiate_expr (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED)
+{
+ tree t = *tp;
+ if (! EXPR_P (t) && ! GIMPLE_STMT_P (t))
+ {
+ *walk_subtrees = 0;
+ if (DECL_P (t) && DECL_RTL_SET_P (t))
+ instantiate_decl (DECL_RTL (t));
+ }
+ return NULL;
+}
+
/* Subroutine of instantiate_decls: Process all decls in the given
BLOCK node and all its subblocks. */
tree t;
for (t = BLOCK_VARS (let); t; t = TREE_CHAIN (t))
- if (DECL_RTL_SET_P (t))
- instantiate_decl (DECL_RTL (t));
+ {
+ if (DECL_RTL_SET_P (t))
+ instantiate_decl (DECL_RTL (t));
+ if (TREE_CODE (t) == VAR_DECL && DECL_HAS_VALUE_EXPR_P (t))
+ {
+ tree v = DECL_VALUE_EXPR (t);
+ walk_tree (&v, instantiate_expr, NULL, NULL);
+ }
+ }
/* Process all subblocks. */
for (t = BLOCK_SUBBLOCKS (let); t; t = TREE_CHAIN (t))
{
instantiate_decl (DECL_RTL (decl));
instantiate_decl (DECL_INCOMING_RTL (decl));
+ if (DECL_HAS_VALUE_EXPR_P (decl))
+ {
+ tree v = DECL_VALUE_EXPR (decl);
+ walk_tree (&v, instantiate_expr, NULL, NULL);
+ }
}
/* Now process all variables defined in the function or its subblocks. */
/* Pass through the INSNS of function FNDECL and convert virtual register
references to hard register references. */
-void
+static unsigned int
instantiate_virtual_regs (void)
{
rtx insn;
var_offset = STARTING_FRAME_OFFSET;
dynamic_offset = STACK_DYNAMIC_OFFSET (current_function_decl);
out_arg_offset = STACK_POINTER_OFFSET;
+#ifdef FRAME_POINTER_CFA_OFFSET
+ cfa_offset = FRAME_POINTER_CFA_OFFSET (current_function_decl);
+#else
cfa_offset = ARG_POINTER_CFA_OFFSET (current_function_decl);
+#endif
/* Initialize recognition, indicating that volatile is OK. */
init_recog ();
/* Indicate that, from now on, assign_stack_local should use
frame_pointer_rtx. */
virtuals_instantiated = 1;
+ return 0;
}
+
+struct tree_opt_pass pass_instantiate_virtual_regs =
+{
+ "vregs", /* name */
+ NULL, /* gate */
+ instantiate_virtual_regs, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ 0, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ TODO_dump_func, /* todo_flags_finish */
+ 0 /* letter */
+};
+
\f
/* Return 1 if EXP is an aggregate type (or a value with aggregate type).
This means a type for which function calls must pass an address to the
tree type = (TYPE_P (exp)) ? exp : TREE_TYPE (exp);
+ /* DECL node associated with FNTYPE when relevant, which we might need to
+ check for by-invisible-reference returns, typically for CALL_EXPR input
+ EXPressions. */
+ tree fndecl = NULL_TREE;
+
if (fntype)
switch (TREE_CODE (fntype))
{
case CALL_EXPR:
- fntype = get_callee_fndecl (fntype);
- fntype = fntype ? TREE_TYPE (fntype) : 0;
+ fndecl = get_callee_fndecl (fntype);
+ fntype = fndecl ? TREE_TYPE (fndecl) : 0;
break;
case FUNCTION_DECL:
- fntype = TREE_TYPE (fntype);
+ fndecl = fntype;
+ fntype = TREE_TYPE (fndecl);
break;
case FUNCTION_TYPE:
case METHOD_TYPE:
if (TREE_CODE (type) == VOID_TYPE)
return 0;
+
/* If the front end has decided that this needs to be passed by
reference, do so. */
if ((TREE_CODE (exp) == PARM_DECL || TREE_CODE (exp) == RESULT_DECL)
&& DECL_BY_REFERENCE (exp))
return 1;
+
+ /* If the EXPression is a CALL_EXPR, honor DECL_BY_REFERENCE set on the
+ called function RESULT_DECL, meaning the function returns in memory by
+ invisible reference. This check lets front-ends not set TREE_ADDRESSABLE
+ on the function type, which used to be the way to request such a return
+ mechanism but might now be causing troubles at gimplification time if
+ temporaries with the function type need to be created. */
+ if (TREE_CODE (exp) == CALL_EXPR && fndecl && DECL_RESULT (fndecl)
+ && DECL_BY_REFERENCE (DECL_RESULT (fndecl)))
+ return 1;
+
if (targetm.calls.return_in_memory (type, fntype))
return 1;
/* Types that are TREE_ADDRESSABLE must be constructed in memory,
return 1;
/* Make sure we have suitable call-clobbered regs to return
the value in; if not, we must return it in memory. */
- reg = hard_function_value (type, 0, 0);
+ reg = hard_function_value (type, 0, fntype, 0);
/* If we have something other than a REG (e.g. a PARALLEL), then assume
it is OK. */
/* If the parm is to be passed as a transparent union, use the type of
the first field for the tests below. We have already verified that
the modes are the same. */
- if (DECL_TRANSPARENT_UNION (parm)
- || (TREE_CODE (passed_type) == UNION_TYPE
- && TYPE_TRANSPARENT_UNION (passed_type)))
+ if (TREE_CODE (passed_type) == UNION_TYPE
+ && TYPE_TRANSPARENT_UNION (passed_type))
passed_type = TREE_TYPE (TYPE_FIELDS (passed_type));
/* See if this arg was passed by invisible reference. */
&& data->nominal_mode != data->passed_mode)
stack_parm = NULL;
+ /* If stack protection is in effect for this function, don't leave any
+ pointers in their passed stack slots. */
+ else if (cfun->stack_protect_guard
+ && (flag_stack_protect == 2
+ || data->passed_pointer
+ || POINTER_TYPE_P (data->nominal_type)))
+ stack_parm = NULL;
+
data->stack_parm = stack_parm;
}
/* Store the parm in a pseudoregister during the function, but we may
need to do it in a wider mode. */
+ /* This is not really promoting for a call. However we need to be
+ consistent with assign_parm_find_data_types and expand_expr_real_1. */
promoted_nominal_mode
- = promote_mode (data->nominal_type, data->nominal_mode, &unsignedp, 0);
+ = promote_mode (data->nominal_type, data->nominal_mode, &unsignedp, 1);
parmreg = gen_reg_rtx (promoted_nominal_mode);
{
struct assign_parm_data_all all;
tree fnargs, parm;
- rtx internal_arg_pointer;
-
- /* If the reg that the virtual arg pointer will be translated into is
- not a fixed reg or is the stack pointer, make a copy of the virtual
- arg pointer, and address parms via the copy. The frame pointer is
- considered fixed even though it is not marked as such.
- The second time through, simply use ap to avoid generating rtx. */
-
- if ((ARG_POINTER_REGNUM == STACK_POINTER_REGNUM
- || ! (fixed_regs[ARG_POINTER_REGNUM]
- || ARG_POINTER_REGNUM == FRAME_POINTER_REGNUM)))
- internal_arg_pointer = copy_to_reg (virtual_incoming_args_rtx);
- else
- internal_arg_pointer = virtual_incoming_args_rtx;
- current_function_internal_arg_pointer = internal_arg_pointer;
+ current_function_internal_arg_pointer
+ = targetm.calls.internal_arg_pointer ();
assign_parms_initialize_all (&all);
fnargs = assign_parms_augmented_arg_list (&all);
REG_PARM_STACK_SPACE (fndecl));
#endif
- current_function_args_size
- = ((current_function_args_size + STACK_BYTES - 1)
- / STACK_BYTES) * STACK_BYTES;
+ current_function_args_size = CEIL_ROUND (current_function_args_size,
+ PARM_BOUNDARY / BITS_PER_UNIT);
#ifdef ARGS_GROW_DOWNWARD
current_function_arg_offset_rtx
{
rtx real_decl_rtl;
-#ifdef FUNCTION_OUTGOING_VALUE
- real_decl_rtl = FUNCTION_OUTGOING_VALUE (TREE_TYPE (decl_result),
- fndecl);
-#else
- real_decl_rtl = FUNCTION_VALUE (TREE_TYPE (decl_result),
- fndecl);
-#endif
+ real_decl_rtl = targetm.calls.function_value (TREE_TYPE (decl_result),
+ fndecl, true);
REG_FUNCTION_VALUE_P (real_decl_rtl) = 1;
/* The delay slot scheduler assumes that current_function_return_rtx
holds the hard register containing the return value, not a
t = built_in_decls[BUILT_IN_ALLOCA];
t = build_function_call_expr (t, args);
t = fold_convert (ptr_type, t);
- t = build2 (MODIFY_EXPR, void_type_node, addr, t);
+ t = build2 (GIMPLE_MODIFY_STMT, void_type_node, addr, t);
gimplify_and_add (t, &stmts);
}
- t = build2 (MODIFY_EXPR, void_type_node, local, parm);
+ t = build2 (GIMPLE_MODIFY_STMT, void_type_node, local, parm);
gimplify_and_add (t, &stmts);
SET_DECL_VALUE_EXPR (parm, local);
{
tree sizetree;
enum direction where_pad;
- int boundary;
+ unsigned int boundary;
int reg_parm_stack_space = 0;
int part_size_in_regs;
locate->where_pad = where_pad;
locate->boundary = boundary;
+ /* Remember if the outgoing parameter requires extra alignment on the
+ calling function side. */
+ if (boundary > PREFERRED_STACK_BOUNDARY)
+ boundary = PREFERRED_STACK_BOUNDARY;
+ if (cfun->stack_alignment_needed < boundary)
+ cfun->stack_alignment_needed = boundary;
+
#ifdef ARGS_GROW_DOWNWARD
locate->slot_offset.constant = -initial_offset_ptr->constant;
if (initial_offset_ptr->var)
HOST_WIDE_INT sp_offset = STACK_POINTER_OFFSET;
#ifdef SPARC_STACK_BOUNDARY_HACK
- /* The sparc port has a bug. It sometimes claims a STACK_BOUNDARY
- higher than the real alignment of %sp. However, when it does this,
- the alignment of %sp+STACK_POINTER_OFFSET will be STACK_BOUNDARY.
- This is a temporary hack while the sparc port is fixed. */
+ /* ??? The SPARC port may claim a STACK_BOUNDARY higher than
+ the real alignment of %sp. However, when it does this, the
+ alignment of %sp+STACK_POINTER_OFFSET is STACK_BOUNDARY. */
if (SPARC_STACK_BOUNDARY_HACK)
sp_offset = 0;
#endif
&& DECL_RTL_SET_P (decl)
&& REG_P (DECL_RTL (decl))
&& regno_clobbered_at_setjmp (REGNO (DECL_RTL (decl))))
- warning (0, "%Jvariable %qD might be clobbered by %<longjmp%>"
+ warning (0, "variable %q+D might be clobbered by %<longjmp%>"
" or %<vfork%>",
- decl, decl);
+ decl);
}
for (sub = BLOCK_SUBBLOCKS (block); sub; sub = TREE_CHAIN (sub))
if (DECL_RTL (decl) != 0
&& REG_P (DECL_RTL (decl))
&& regno_clobbered_at_setjmp (REGNO (DECL_RTL (decl))))
- warning (0, "%Jargument %qD might be clobbered by %<longjmp%> or %<vfork%>",
- decl, decl);
+ warning (0, "argument %q+D might be clobbered by %<longjmp%> or %<vfork%>",
+ decl);
}
\f
reorder_blocks_1 (get_insns (), block, &block_stack);
BLOCK_SUBBLOCKS (block) = blocks_nreverse (BLOCK_SUBBLOCKS (block));
- /* Remove deleted blocks from the block fragment chains. */
- reorder_fix_fragments (block);
-
VEC_free (tree, heap, block_stack);
}
if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_BLOCK_BEG)
{
tree block = NOTE_BLOCK (insn);
+ tree origin;
+
+ origin = (BLOCK_FRAGMENT_ORIGIN (block)
+ ? BLOCK_FRAGMENT_ORIGIN (block)
+ : block);
/* If we have seen this block before, that means it now
spans multiple address regions. Create a new fragment. */
if (TREE_ASM_WRITTEN (block))
{
tree new_block = copy_node (block);
- tree origin;
- origin = (BLOCK_FRAGMENT_ORIGIN (block)
- ? BLOCK_FRAGMENT_ORIGIN (block)
- : block);
BLOCK_FRAGMENT_ORIGIN (new_block) = origin;
BLOCK_FRAGMENT_CHAIN (new_block)
= BLOCK_FRAGMENT_CHAIN (origin);
will cause infinite recursion. */
if (block != current_block)
{
+ if (block != origin)
+ gcc_assert (BLOCK_SUPERCONTEXT (origin) == current_block);
+
BLOCK_SUPERCONTEXT (block) = current_block;
BLOCK_CHAIN (block) = BLOCK_SUBBLOCKS (current_block);
BLOCK_SUBBLOCKS (current_block) = block;
- current_block = block;
+ current_block = origin;
}
VEC_safe_push (tree, heap, *p_block_stack, block);
}
}
}
-/* Rationalize BLOCK_FRAGMENT_ORIGIN. If an origin block no longer
- appears in the block tree, select one of the fragments to become
- the new origin block. */
-
-static void
-reorder_fix_fragments (tree block)
-{
- while (block)
- {
- tree dup_origin = BLOCK_FRAGMENT_ORIGIN (block);
- tree new_origin = NULL_TREE;
-
- if (dup_origin)
- {
- if (! TREE_ASM_WRITTEN (dup_origin))
- {
- new_origin = BLOCK_FRAGMENT_CHAIN (dup_origin);
-
- /* Find the first of the remaining fragments. There must
- be at least one -- the current block. */
- while (! TREE_ASM_WRITTEN (new_origin))
- new_origin = BLOCK_FRAGMENT_CHAIN (new_origin);
- BLOCK_FRAGMENT_ORIGIN (new_origin) = NULL_TREE;
- }
- }
- else if (! dup_origin)
- new_origin = block;
-
- /* Re-root the rest of the fragments to the new origin. In the
- case that DUP_ORIGIN was null, that means BLOCK was the origin
- of a chain of fragments and we want to remove those fragments
- that didn't make it to the output. */
- if (new_origin)
- {
- tree *pp = &BLOCK_FRAGMENT_CHAIN (new_origin);
- tree chain = *pp;
-
- while (chain)
- {
- if (TREE_ASM_WRITTEN (chain))
- {
- BLOCK_FRAGMENT_ORIGIN (chain) = new_origin;
- *pp = chain;
- pp = &BLOCK_FRAGMENT_CHAIN (chain);
- }
- chain = BLOCK_FRAGMENT_CHAIN (chain);
- }
- *pp = NULL_TREE;
- }
-
- reorder_fix_fragments (BLOCK_SUBBLOCKS (block));
- block = BLOCK_CHAIN (block);
- }
-}
-
/* Reverse the order of elements in the chain T of blocks,
and return the new head of the chain (old last element). */
tree *block_vector;
*n_blocks_p = all_blocks (block, NULL);
- block_vector = xmalloc (*n_blocks_p * sizeof (tree));
+ block_vector = XNEWVEC (tree, *n_blocks_p);
all_blocks (block, block_vector);
return block_vector;
/* Make sure all values used by the optimization passes have sane
defaults. */
-void
+unsigned int
init_function_for_compilation (void)
{
reg_renumber = 0;
gcc_assert (VEC_length (int, prologue) == 0);
gcc_assert (VEC_length (int, epilogue) == 0);
gcc_assert (VEC_length (int, sibcall_epilogue) == 0);
+ return 0;
}
+struct tree_opt_pass pass_init_function =
+{
+ NULL, /* name */
+ NULL, /* gate */
+ init_function_for_compilation, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ 0, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+ 0 /* letter */
+};
+
+
void
expand_main_function (void)
{
-#ifdef FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN
- if (FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN)
- {
- int align = PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT;
- rtx tmp, seq;
+#if (defined(INVOKE__main) \
+ || (!defined(HAS_INIT_SECTION) \
+ && !defined(INIT_SECTION_ASM_OP) \
+ && !defined(INIT_ARRAY_SECTION_ASM_OP)))
+ emit_library_call (init_one_libfunc (NAME__MAIN), LCT_NORMAL, VOIDmode, 0);
+#endif
+}
+\f
+/* Expand code to initialize the stack_protect_guard. This is invoked at
+ the beginning of a function to be protected. */
- start_sequence ();
- /* Forcibly align the stack. */
-#ifdef STACK_GROWS_DOWNWARD
- tmp = expand_simple_binop (Pmode, AND, stack_pointer_rtx, GEN_INT(-align),
- stack_pointer_rtx, 1, OPTAB_WIDEN);
-#else
- tmp = expand_simple_binop (Pmode, PLUS, stack_pointer_rtx,
- GEN_INT (align - 1), NULL_RTX, 1, OPTAB_WIDEN);
- tmp = expand_simple_binop (Pmode, AND, tmp, GEN_INT (-align),
- stack_pointer_rtx, 1, OPTAB_WIDEN);
+#ifndef HAVE_stack_protect_set
+# define HAVE_stack_protect_set 0
+# define gen_stack_protect_set(x,y) (gcc_unreachable (), NULL_RTX)
#endif
- if (tmp != stack_pointer_rtx)
- emit_move_insn (stack_pointer_rtx, tmp);
- /* Enlist allocate_dynamic_stack_space to pick up the pieces. */
- tmp = force_reg (Pmode, const0_rtx);
- allocate_dynamic_stack_space (tmp, NULL_RTX, BIGGEST_ALIGNMENT);
- seq = get_insns ();
- end_sequence ();
+void
+stack_protect_prologue (void)
+{
+ tree guard_decl = targetm.stack_protect_guard ();
+ rtx x, y;
+
+ /* Avoid expand_expr here, because we don't want guard_decl pulled
+ into registers unless absolutely necessary. And we know that
+ cfun->stack_protect_guard is a local stack slot, so this skips
+ all the fluff. */
+ x = validize_mem (DECL_RTL (cfun->stack_protect_guard));
+ y = validize_mem (DECL_RTL (guard_decl));
+
+ /* Allow the target to copy from Y to X without leaking Y into a
+ register. */
+ if (HAVE_stack_protect_set)
+ {
+ rtx insn = gen_stack_protect_set (x, y);
+ if (insn)
+ {
+ emit_insn (insn);
+ return;
+ }
+ }
- for (tmp = get_last_insn (); tmp; tmp = PREV_INSN (tmp))
- if (NOTE_P (tmp) && NOTE_LINE_NUMBER (tmp) == NOTE_INSN_FUNCTION_BEG)
- break;
+ /* Otherwise do a straight move. */
+ emit_move_insn (x, y);
+}
+
+/* Expand code to verify the stack_protect_guard. This is invoked at
+ the end of a function to be protected. */
+
+#ifndef HAVE_stack_protect_test
+# define HAVE_stack_protect_test 0
+# define gen_stack_protect_test(x, y, z) (gcc_unreachable (), NULL_RTX)
+#endif
+
+void
+stack_protect_epilogue (void)
+{
+ tree guard_decl = targetm.stack_protect_guard ();
+ rtx label = gen_label_rtx ();
+ rtx x, y, tmp;
+
+ /* Avoid expand_expr here, because we don't want guard_decl pulled
+ into registers unless absolutely necessary. And we know that
+ cfun->stack_protect_guard is a local stack slot, so this skips
+ all the fluff. */
+ x = validize_mem (DECL_RTL (cfun->stack_protect_guard));
+ y = validize_mem (DECL_RTL (guard_decl));
+
+ /* Allow the target to compare Y with X without leaking either into
+ a register. */
+ switch (HAVE_stack_protect_test != 0)
+ {
+ case 1:
+ tmp = gen_stack_protect_test (x, y, label);
if (tmp)
- emit_insn_before (seq, tmp);
- else
- emit_insn (seq);
+ {
+ emit_insn (tmp);
+ break;
+ }
+ /* FALLTHRU */
+
+ default:
+ emit_cmp_and_jump_insns (x, y, EQ, NULL_RTX, ptr_mode, 1, label);
+ break;
}
-#endif
-#if (defined(INVOKE__main) \
- || (!defined(HAS_INIT_SECTION) \
- && !defined(INIT_SECTION_ASM_OP) \
- && !defined(INIT_ARRAY_SECTION_ASM_OP)))
- emit_library_call (init_one_libfunc (NAME__MAIN), LCT_NORMAL, VOIDmode, 0);
-#endif
+ /* The noreturn predictor has been moved to the tree level. The rtl-level
+ predictors estimate this branch about 20%, which isn't enough to get
+ things moved out of line. Since this is the only extant case of adding
+ a noreturn function at the rtl level, it doesn't seem worth doing ought
+ except adding the prediction by hand. */
+ tmp = get_last_insn ();
+ if (JUMP_P (tmp))
+ predict_insn_def (tmp, PRED_NORETURN, TAKEN);
+
+ expand_expr_stmt (targetm.stack_protect_fail ());
+ emit_label (label);
}
\f
/* Start the RTL for a new function, and set variables used for
else
#endif
{
- rtx sv = targetm.calls.struct_value_rtx (TREE_TYPE (subr), 1);
+ rtx sv = targetm.calls.struct_value_rtx (TREE_TYPE (subr), 2);
/* Expect to be passed the address of a place to store the value.
If it is passed as an argument, assign_parms will take care of
it. */
/* In order to figure out what mode to use for the pseudo, we
figure out what the mode of the eventual return register will
actually be, and use that. */
- rtx hard_reg = hard_function_value (return_type, subr, 1);
+ rtx hard_reg = hard_function_value (return_type, subr, 0, 1);
/* Structures that are returned in registers are not
aggregate_value_p, so we may see a PARALLEL or a REG. */
as opposed to parm setup. */
emit_note (NOTE_INSN_FUNCTION_BEG);
- if (!NOTE_P (get_last_insn ()))
- emit_note (NOTE_INSN_DELETED);
+ gcc_assert (NOTE_P (get_last_insn ()));
+
parm_birth_insn = get_last_insn ();
if (current_function_profile)
#endif
}
- /* After the display initializations is where the tail-recursion label
- should go, if we end up needing one. Ensure we have a NOTE here
- since some things (like trampolines) get placed before this. */
- tail_recursion_reentry = emit_note (NOTE_INSN_DELETED);
+ /* After the display initializations is where the stack checking
+ probe should go. */
+ if(flag_stack_check)
+ stack_check_probe_note = emit_note (NOTE_INSN_DELETED);
/* Make sure there is a line number after the function entry setup code. */
force_next_line_note ();
emit_insn (gen_rtx_USE (VOIDmode, reg));
}
-void
+static void
use_return_register (void)
{
diddle_return_value (do_use_return_reg, NULL);
decl; decl = TREE_CHAIN (decl))
if (!TREE_USED (decl) && TREE_CODE (decl) == PARM_DECL
&& DECL_NAME (decl) && !DECL_ARTIFICIAL (decl))
- warning (0, "%Junused parameter %qD", decl, decl);
+ warning (OPT_Wunused_parameter, "unused parameter %q+D", decl);
}
static GTY(()) rtx initial_trampoline;
GEN_INT (STACK_CHECK_MAX_FRAME_SIZE));
seq = get_insns ();
end_sequence ();
- emit_insn_before (seq, tail_recursion_reentry);
+ emit_insn_before (seq, stack_check_probe_note);
break;
}
}
clear_pending_stack_adjust ();
do_pending_stack_adjust ();
- /* @@@ This is a kludge. We want to ensure that instructions that
- may trap are not moved into the epilogue by scheduling, because
- we don't always emit unwind information for the epilogue.
- However, not all machine descriptions define a blockage insn, so
- emit an ASM_INPUT to act as one. */
- if (flag_non_call_exceptions)
- emit_insn (gen_rtx_ASM_INPUT (VOIDmode, ""));
-
- /* Mark the end of the function body.
- If control reaches this insn, the function can drop through
- without returning a value. */
- emit_note (NOTE_INSN_FUNCTION_END);
-
- /* Must mark the last line number note in the function, so that the test
- coverage code can avoid counting the last line twice. This just tells
- the code to ignore the immediately following line note, since there
- already exists a copy of this note somewhere above. This line number
- note is still needed for debugging though, so we can't delete it. */
- if (flag_test_coverage)
- emit_note (NOTE_INSN_REPEATED_LINE_NUMBER);
-
/* Output a linenumber for the end of the function.
SDB depends on this. */
force_next_line_note ();
/* Output the label for the actual return from the function. */
emit_label (return_label);
- /* Let except.c know where it should emit the call to unregister
- the function context for sjlj exceptions. */
- if (flag_exceptions && USING_SJLJ_EXCEPTIONS)
- sjlj_emit_function_exit_after (get_last_insn ());
+ if (USING_SJLJ_EXCEPTIONS)
+ {
+ /* Let except.c know where it should emit the call to unregister
+ the function context for sjlj exceptions. */
+ if (flag_exceptions)
+ sjlj_emit_function_exit_after (get_last_insn ());
+ }
+ else
+ {
+ /* @@@ This is a kludge. We want to ensure that instructions that
+ may trap are not moved into the epilogue by scheduling, because
+ we don't always emit unwind information for the epilogue.
+ However, not all machine descriptions define a blockage insn, so
+ emit an ASM_INPUT to act as one. */
+ if (flag_non_call_exceptions)
+ emit_insn (gen_rtx_ASM_INPUT (VOIDmode, ""));
+ }
+
+ /* If this is an implementation of throw, do what's necessary to
+ communicate between __builtin_eh_return and the epilogue. */
+ expand_eh_return ();
/* If scalar return value was computed in a pseudo-reg, or was a named
return value that got dumped to the stack, copy that to the hard
TREE_TYPE (decl_result),
int_size_in_bytes (TREE_TYPE (decl_result)));
}
+ /* In the case of complex integer modes smaller than a word, we'll
+ need to generate some non-trivial bitfield insertions. Do that
+ on a pseudo and not the hard register. */
+ else if (GET_CODE (decl_rtl) == CONCAT
+ && GET_MODE_CLASS (GET_MODE (decl_rtl)) == MODE_COMPLEX_INT
+ && GET_MODE_BITSIZE (GET_MODE (decl_rtl)) <= BITS_PER_WORD)
+ {
+ int old_generating_concat_p;
+ rtx tmp;
+
+ old_generating_concat_p = generating_concat_p;
+ generating_concat_p = 0;
+ tmp = gen_reg_rtx (GET_MODE (decl_rtl));
+ generating_concat_p = old_generating_concat_p;
+
+ emit_move_insn (tmp, decl_rtl);
+ emit_move_insn (real_decl_rtl, tmp);
+ }
else
emit_move_insn (real_decl_rtl, decl_rtl);
}
else
value_address = XEXP (value_address, 0);
-#ifdef FUNCTION_OUTGOING_VALUE
- outgoing = FUNCTION_OUTGOING_VALUE (build_pointer_type (type),
- current_function_decl);
-#else
- outgoing = FUNCTION_VALUE (build_pointer_type (type),
- current_function_decl);
-#endif
+ outgoing = targetm.calls.function_value (build_pointer_type (type),
+ current_function_decl, true);
/* Mark this as a function return value so integrate will delete the
assignment and USE below when inlining this function. */
current_function_return_rtx = outgoing;
}
- /* If this is an implementation of throw, do what's necessary to
- communicate between __builtin_eh_return and the epilogue. */
- expand_eh_return ();
-
/* Emit the actual code to clobber return register. */
{
rtx seq;
/* Output the label for the naked return from the function. */
emit_label (naked_return_label);
+ /* If stack protection is enabled for this function, check the guard. */
+ if (cfun->stack_protect_guard)
+ stack_protect_epilogue ();
+
/* If we had calls to alloca, and this machine needs
an accurate stack pointer to exit the function,
insert some code to save and restore the stack pointer. */
block_for_insn appropriately. */
static void
-emit_return_into_block (basic_block bb, rtx line_note)
+emit_return_into_block (basic_block bb)
{
emit_jump_insn_after (gen_return (), BB_END (bb));
- if (line_note)
- emit_note_copy_after (line_note, PREV_INSN (BB_END (bb)));
}
#endif /* HAVE_return */
info.sp_offset));
retaddr = gen_rtx_MEM (Pmode, retaddr);
+ MEM_NOTRAP_P (retaddr) = 1;
/* If there is a pending load to the equivalent register for SP
and we reference that register, we must load our address into
if (BB_HEAD (last) == label && LABEL_P (label))
{
edge_iterator ei2;
- rtx epilogue_line_note = NULL_RTX;
-
- /* Locate the line number associated with the closing brace,
- if we can find one. */
- for (seq = get_last_insn ();
- seq && ! active_insn_p (seq);
- seq = PREV_INSN (seq))
- if (NOTE_P (seq) && NOTE_LINE_NUMBER (seq) > 0)
- {
- epilogue_line_note = seq;
- break;
- }
for (ei2 = ei_start (last->preds); (e = ei_safe_edge (ei2)); )
{
with a simple return instruction. */
if (simplejump_p (jump))
{
- emit_return_into_block (bb, epilogue_line_note);
+ emit_return_into_block (bb);
delete_insn (jump);
}
this is still reachable will be determined later. */
emit_barrier_after (BB_END (last));
- emit_return_into_block (last, epilogue_line_note);
+ emit_return_into_block (last);
epilogue_end = BB_END (last);
single_succ_edge (last)->flags &= ~EDGE_FALLTHRU;
goto epilogue_done;
fixup_fallthru_exit_predecessor. */
cfg_layout_initialize (0);
FOR_EACH_BB (cur_bb)
- if (cur_bb->index >= 0 && cur_bb->next_bb->index >= 0)
- cur_bb->rbi->next = cur_bb->next_bb;
+ if (cur_bb->index >= NUM_FIXED_BLOCKS
+ && cur_bb->next_bb->index >= NUM_FIXED_BLOCKS)
+ cur_bb->aux = cur_bb->next_bb;
cfg_layout_finalize ();
}
epilogue_done:
}
#endif
-#ifdef HAVE_prologue
- /* This is probably all useless now that we use locators. */
- if (prologue_end)
- {
- rtx insn, prev;
-
- /* GDB handles `break f' by setting a breakpoint on the first
- line note after the prologue. Which means (1) that if
- there are line number notes before where we inserted the
- prologue we should move them, and (2) we should generate a
- note before the end of the first basic block, if there isn't
- one already there.
-
- ??? This behavior is completely broken when dealing with
- multiple entry functions. We simply place the note always
- into first basic block and let alternate entry points
- to be missed.
- */
-
- for (insn = prologue_end; insn; insn = prev)
- {
- prev = PREV_INSN (insn);
- if (NOTE_P (insn) && NOTE_LINE_NUMBER (insn) > 0)
- {
- /* Note that we cannot reorder the first insn in the
- chain, since rest_of_compilation relies on that
- remaining constant. */
- if (prev == NULL)
- break;
- reorder_insns (insn, insn, prologue_end);
- }
- }
-
- /* Find the last line number note in the first block. */
- for (insn = BB_END (ENTRY_BLOCK_PTR->next_bb);
- insn != prologue_end && insn;
- insn = PREV_INSN (insn))
- if (NOTE_P (insn) && NOTE_LINE_NUMBER (insn) > 0)
- break;
-
- /* If we didn't find one, make a copy of the first line number
- we run across. */
- if (! insn)
- {
- for (insn = next_active_insn (prologue_end);
- insn;
- insn = PREV_INSN (insn))
- if (NOTE_P (insn) && NOTE_LINE_NUMBER (insn) > 0)
- {
- emit_note_copy_after (insn, prologue_end);
- break;
- }
- }
- }
-#endif
#ifdef HAVE_epilogue
if (epilogue_end)
{
/* Similarly, move any line notes that appear after the epilogue.
There is no need, however, to be quite so anal about the existence
- of such a note. Also move the NOTE_INSN_FUNCTION_END and (possibly)
+ of such a note. Also possibly move
NOTE_INSN_FUNCTION_BEG notes, as those can be relevant for debug
info generation. */
for (insn = epilogue_end; insn; insn = next)
{
next = NEXT_INSN (insn);
if (NOTE_P (insn)
- && (NOTE_LINE_NUMBER (insn) > 0
- || NOTE_LINE_NUMBER (insn) == NOTE_INSN_FUNCTION_BEG
- || NOTE_LINE_NUMBER (insn) == NOTE_INSN_FUNCTION_END))
+ && (NOTE_LINE_NUMBER (insn) == NOTE_INSN_FUNCTION_BEG))
reorder_insns (insn, insn, PREV_INSN (epilogue_end));
}
}
void
reset_block_changes (void)
{
- VARRAY_TREE_INIT (cfun->ib_boundaries_block, 100, "ib_boundaries_block");
- VARRAY_PUSH_TREE (cfun->ib_boundaries_block, NULL_TREE);
+ cfun->ib_boundaries_block = VEC_alloc (tree, gc, 100);
+ VEC_quick_push (tree, cfun->ib_boundaries_block, NULL_TREE);
}
/* Record the boundary for BLOCK. */
if (!block)
return;
- last_block = VARRAY_TOP_TREE (cfun->ib_boundaries_block);
- VARRAY_POP (cfun->ib_boundaries_block);
+ if(!cfun->ib_boundaries_block)
+ return;
+
+ last_block = VEC_pop (tree, cfun->ib_boundaries_block);
n = get_max_uid ();
- for (i = VARRAY_ACTIVE_SIZE (cfun->ib_boundaries_block); i < n; i++)
- VARRAY_PUSH_TREE (cfun->ib_boundaries_block, last_block);
+ for (i = VEC_length (tree, cfun->ib_boundaries_block); i < n; i++)
+ VEC_safe_push (tree, gc, cfun->ib_boundaries_block, last_block);
- VARRAY_PUSH_TREE (cfun->ib_boundaries_block, block);
+ VEC_safe_push (tree, gc, cfun->ib_boundaries_block, block);
}
/* Finishes record of boundaries. */
-void finalize_block_changes (void)
+void
+finalize_block_changes (void)
{
record_block_change (DECL_INITIAL (current_function_decl));
}
{
unsigned uid = INSN_UID (insn);
- if (uid >= VARRAY_ACTIVE_SIZE (cfun->ib_boundaries_block))
+ if (uid >= VEC_length (tree, cfun->ib_boundaries_block))
return;
- *block = VARRAY_TREE (cfun->ib_boundaries_block, uid);
+ *block = VEC_index (tree, cfun->ib_boundaries_block, uid);
}
/* Releases the ib_boundaries_block records. */
void
free_block_changes (void)
{
- cfun->ib_boundaries_block = NULL;
+ VEC_free (tree, gc, cfun->ib_boundaries_block);
}
/* Returns the name of the current function. */
{
return lang_hooks.decl_printable_name (cfun->decl, 2);
}
+\f
+
+static unsigned int
+rest_of_handle_check_leaf_regs (void)
+{
+#ifdef LEAF_REGISTERS
+ current_function_uses_only_leaf_regs
+ = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
+#endif
+ return 0;
+}
+
+/* Insert a TYPE into the used types hash table of CFUN. */
+static void
+used_types_insert_helper (tree type, struct function *func)
+{
+ if (type != NULL && func != NULL)
+ {
+ void **slot;
+
+ if (func->used_types_hash == NULL)
+ func->used_types_hash = htab_create_ggc (37, htab_hash_pointer,
+ htab_eq_pointer, NULL);
+ slot = htab_find_slot (func->used_types_hash, type, INSERT);
+ if (*slot == NULL)
+ *slot = type;
+ }
+}
+
+/* Given a type, insert it into the used hash table in cfun. */
+void
+used_types_insert (tree t)
+{
+ while (POINTER_TYPE_P (t) || TREE_CODE (t) == ARRAY_TYPE)
+ t = TREE_TYPE (t);
+ t = TYPE_MAIN_VARIANT (t);
+ if (debug_info_level > DINFO_LEVEL_NONE)
+ used_types_insert_helper (t, cfun);
+}
+
+struct tree_opt_pass pass_leaf_regs =
+{
+ NULL, /* name */
+ NULL, /* gate */
+ rest_of_handle_check_leaf_regs, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ 0, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+ 0 /* letter */
+};
+
#include "gt-function.h"
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