/* Expands front end tree to back end RTL for GCC
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
Free Software Foundation, Inc.
This file is part of GCC.
{
rtx ref = label_rtx (label);
tree function = decl_function_context (label);
- struct function *p;
gcc_assert (function);
- if (function != current_function_decl)
- p = find_function_data (function);
- else
- p = cfun;
-
- p->expr->x_forced_labels = gen_rtx_EXPR_LIST (VOIDmode, ref,
- p->expr->x_forced_labels);
+ forced_labels = gen_rtx_EXPR_LIST (VOIDmode, ref, forced_labels);
return ref;
}
*p, operand_num);
/* Make a copy of the constraint. */
- buf = alloca (c_len + 1);
+ buf = XALLOCAVEC (char, c_len + 1);
strcpy (buf, constraint);
/* Swap the first character and the `=' or `+'. */
buf[p - constraint] = buf[0];
}
break;
- case 'V': case 'm': case 'o':
+ case 'V': case TARGET_MEM_CONSTRAINT: case 'o':
*allows_mem = true;
break;
}
break;
- case 'V': case 'm': case 'o':
+ case 'V': case TARGET_MEM_CONSTRAINT: case 'o':
*allows_mem = true;
break;
void *data)
{
tree decl = *declp;
- const HARD_REG_SET *regs = data;
+ const HARD_REG_SET *const regs = (const HARD_REG_SET *) data;
if (TREE_CODE (decl) == VAR_DECL)
{
STRING is the instruction template.
OUTPUTS is a list of output arguments (lvalues); INPUTS a list of inputs.
Each output or input has an expression in the TREE_VALUE and
- and a tree list in TREE_PURPOSE which in turn contains a constraint
+ a tree list in TREE_PURPOSE which in turn contains a constraint
name in TREE_VALUE (or NULL_TREE) and a constraint string
in TREE_PURPOSE.
CLOBBERS is a list of STRING_CST nodes each naming a hard register
tree t;
int i;
/* Vector of RTX's of evaluated output operands. */
- rtx *output_rtx = alloca (noutputs * sizeof (rtx));
- int *inout_opnum = alloca (noutputs * sizeof (int));
- rtx *real_output_rtx = alloca (noutputs * sizeof (rtx));
- enum machine_mode *inout_mode
- = alloca (noutputs * sizeof (enum machine_mode));
- const char **constraints
- = alloca ((noutputs + ninputs) * sizeof (const char *));
+ rtx *output_rtx = XALLOCAVEC (rtx, noutputs);
+ int *inout_opnum = XALLOCAVEC (int, noutputs);
+ rtx *real_output_rtx = XALLOCAVEC (rtx, noutputs);
+ enum machine_mode *inout_mode = XALLOCAVEC (enum machine_mode, noutputs);
+ const char **constraints = XALLOCAVEC (const char *, noutputs + ninputs);
int old_generating_concat_p = generating_concat_p;
/* An ASM with no outputs needs to be treated as volatile, for now. */
if (real_output_rtx[i])
emit_move_insn (real_output_rtx[i], output_rtx[i]);
- cfun->has_asm_statement = 1;
+ crtl->has_asm_statement = 1;
free_temp_slots ();
}
tree type;
value = expand_expr (exp, const0_rtx, VOIDmode, EXPAND_NORMAL);
- if (GIMPLE_TUPLE_P (exp))
- type = void_type_node;
- else
type = TREE_TYPE (exp);
/* If all we do is reference a volatile value in memory,
case PREDECREMENT_EXPR:
case POSTDECREMENT_EXPR:
case MODIFY_EXPR:
- case GIMPLE_MODIFY_STMT:
case INIT_EXPR:
case TARGET_EXPR:
case CALL_EXPR:
expand_null_return ();
return;
}
- else if ((TREE_CODE (retval) == GIMPLE_MODIFY_STMT
+ else if ((TREE_CODE (retval) == MODIFY_EXPR
|| TREE_CODE (retval) == INIT_EXPR)
- && TREE_CODE (GENERIC_TREE_OPERAND (retval, 0)) == RESULT_DECL)
- retval_rhs = GENERIC_TREE_OPERAND (retval, 1);
+ && TREE_CODE (TREE_OPERAND (retval, 0)) == RESULT_DECL)
+ retval_rhs = TREE_OPERAND (retval, 1);
else
retval_rhs = retval;
(and in expand_call). */
else if (retval_rhs != 0
- && TYPE_MODE (GENERIC_TREE_TYPE (retval_rhs)) == BLKmode
+ && TYPE_MODE (TREE_TYPE (retval_rhs)) == BLKmode
&& REG_P (result_rtl))
{
int i;
int n_regs = (bytes + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
unsigned int bitsize
= MIN (TYPE_ALIGN (TREE_TYPE (retval_rhs)), BITS_PER_WORD);
- rtx *result_pseudos = alloca (sizeof (rtx) * n_regs);
+ rtx *result_pseudos = XALLOCAVEC (rtx, n_regs);
rtx result_reg, src = NULL_RTX, dst = NULL_RTX;
rtx result_val = expand_normal (retval_rhs);
enum machine_mode tmpmode, result_reg_mode;
{
/* Clobber the FP when we get here, so we have to make sure it's
marked as used by this function. */
- emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx));
+ emit_use (hard_frame_pointer_rtx);
/* Mark the static chain as clobbered here so life information
doesn't get messed up for it. */
- emit_insn (gen_rtx_CLOBBER (VOIDmode, static_chain_rtx));
+ emit_clobber (static_chain_rtx);
#ifdef HAVE_nonlocal_goto
if (! HAVE_nonlocal_goto)
{
/* Now restore our arg pointer from the address at which it
was saved in our stack frame. */
- emit_move_insn (virtual_incoming_args_rtx,
- copy_to_reg (get_arg_pointer_save_area (cfun)));
+ emit_move_insn (crtl->args.internal_arg_pointer,
+ copy_to_reg (get_arg_pointer_save_area ()));
}
}
#endif
SET_DECL_RTL (decl, gen_rtx_MEM (BLKmode, const0_rtx));
else if (DECL_SIZE (decl) == 0)
- /* Variable with incomplete type. */
{
+ /* Variable with incomplete type. */
rtx x;
if (DECL_INITIAL (decl) == 0)
/* Error message was already done; now avoid a crash. */
TYPE_ALIGN (TREE_TYPE (TREE_TYPE (decl))));
}
- else if (TREE_CODE (DECL_SIZE_UNIT (decl)) == INTEGER_CST
- && ! (flag_stack_check && ! STACK_CHECK_BUILTIN
- && 0 < compare_tree_int (DECL_SIZE_UNIT (decl),
- STACK_CHECK_MAX_VAR_SIZE)))
+ else
{
- /* Variable of fixed size that goes on the stack. */
rtx oldaddr = 0;
rtx addr;
rtx x;
+ /* Variable-sized decls are dealt with in the gimplifier. */
+ gcc_assert (TREE_CODE (DECL_SIZE_UNIT (decl)) == INTEGER_CST);
+
/* If we previously made RTL for this decl, it must be an array
whose size was determined by the initializer.
The old address was a register; set that register now
emit_move_insn (oldaddr, addr);
}
}
- else
- /* Dynamic-size object: must push space on the stack. */
- {
- rtx address, size, x;
-
- /* Record the stack pointer on entry to block, if have
- not already done so. */
- do_pending_stack_adjust ();
-
- /* Compute the variable's size, in bytes. This will expand any
- needed SAVE_EXPRs for the first time. */
- size = expand_normal (DECL_SIZE_UNIT (decl));
- free_temp_slots ();
-
- /* Allocate space on the stack for the variable. Note that
- DECL_ALIGN says how the variable is to be aligned and we
- cannot use it to conclude anything about the alignment of
- the size. */
- address = allocate_dynamic_stack_space (size, NULL_RTX,
- TYPE_ALIGN (TREE_TYPE (decl)));
-
- /* Reference the variable indirect through that rtx. */
- x = gen_rtx_MEM (DECL_MODE (decl), address);
- set_mem_attributes (x, decl, 1);
- SET_DECL_RTL (decl, x);
-
-
- /* Indicate the alignment we actually gave this variable. */
-#ifdef STACK_BOUNDARY
- DECL_ALIGN (decl) = STACK_BOUNDARY;
-#else
- DECL_ALIGN (decl) = BIGGEST_ALIGNMENT;
-#endif
- DECL_USER_ALIGN (decl) = 0;
- }
}
\f
/* Emit code to save the current value of stack. */
void
expand_stack_restore (tree var)
{
- rtx sa = DECL_RTL (var);
+ rtx sa = expand_normal (var);
+ sa = convert_memory_address (Pmode, sa);
emit_stack_restore (SAVE_BLOCK, sa, NULL_RTX);
}
\f
-/* DECL is an anonymous union. CLEANUP is a cleanup for DECL.
- DECL_ELTS is the list of elements that belong to DECL's type.
- In each, the TREE_VALUE is a VAR_DECL, and the TREE_PURPOSE a cleanup. */
-
-void
-expand_anon_union_decl (tree decl, tree cleanup ATTRIBUTE_UNUSED,
- tree decl_elts)
-{
- rtx x;
- tree t;
-
- /* If any of the elements are addressable, so is the entire union. */
- for (t = decl_elts; t; t = TREE_CHAIN (t))
- if (TREE_ADDRESSABLE (TREE_VALUE (t)))
- {
- TREE_ADDRESSABLE (decl) = 1;
- break;
- }
-
- expand_decl (decl);
- x = DECL_RTL (decl);
-
- /* Go through the elements, assigning RTL to each. */
- for (t = decl_elts; t; t = TREE_CHAIN (t))
- {
- tree decl_elt = TREE_VALUE (t);
- enum machine_mode mode = TYPE_MODE (TREE_TYPE (decl_elt));
- rtx decl_rtl;
-
- /* If any of the elements are addressable, so is the entire
- union. */
- if (TREE_USED (decl_elt))
- TREE_USED (decl) = 1;
-
- /* Propagate the union's alignment to the elements. */
- DECL_ALIGN (decl_elt) = DECL_ALIGN (decl);
- DECL_USER_ALIGN (decl_elt) = DECL_USER_ALIGN (decl);
-
- /* If the element has BLKmode and the union doesn't, the union is
- aligned such that the element doesn't need to have BLKmode, so
- change the element's mode to the appropriate one for its size. */
- if (mode == BLKmode && DECL_MODE (decl) != BLKmode)
- DECL_MODE (decl_elt) = mode
- = mode_for_size_tree (DECL_SIZE (decl_elt), MODE_INT, 1);
-
- if (mode == GET_MODE (x))
- decl_rtl = x;
- else if (MEM_P (x))
- /* (SUBREG (MEM ...)) at RTL generation time is invalid, so we
- instead create a new MEM rtx with the proper mode. */
- decl_rtl = adjust_address_nv (x, mode, 0);
- else
- {
- gcc_assert (REG_P (x));
- decl_rtl = gen_lowpart_SUBREG (mode, x);
- }
- SET_DECL_RTL (decl_elt, decl_rtl);
- }
-}
-\f
/* Do the insertion of a case label into case_list. The labels are
fed to us in descending order from the sorted vector of case labels used
in the tree part of the middle end. So the list we construct is
if (!init)
{
rtx reg = gen_rtx_REG (word_mode, 10000);
- int cost = rtx_cost (gen_rtx_ASHIFT (word_mode, const1_rtx, reg), SET);
+ int cost = rtx_cost (gen_rtx_ASHIFT (word_mode, const1_rtx, reg), SET,
+ optimize_insn_for_speed_p ());
cheap = cost < COSTS_N_INSNS (3);
init = true;
}
static int
case_bit_test_cmp (const void *p1, const void *p2)
{
- const struct case_bit_test *d1 = p1;
- const struct case_bit_test *d2 = p2;
+ const struct case_bit_test *const d1 = (const struct case_bit_test *) p1;
+ const struct case_bit_test *const d2 = (const struct case_bit_test *) p2;
if (d2->bits != d1->bits)
return d2->bits - d1->bits;
mode = TYPE_MODE (index_type);
expr = expand_normal (range);
- emit_cmp_and_jump_insns (index, expr, GTU, NULL_RTX, mode, 1,
- default_label);
+ if (default_label)
+ emit_cmp_and_jump_insns (index, expr, GTU, NULL_RTX, mode, 1,
+ default_label);
index = convert_to_mode (word_mode, index, 0);
index = expand_binop (word_mode, ashl_optab, const1_rtx,
word_mode, 1, test[i].label);
}
- emit_jump (default_label);
+ if (default_label)
+ emit_jump (default_label);
}
#ifndef HAVE_casesi
struct case_node *case_list = 0;
/* Label to jump to if no case matches. */
- tree default_label_decl;
+ tree default_label_decl = NULL_TREE;
alloc_pool case_node_pool = create_alloc_pool ("struct case_node pool",
sizeof (struct case_node),
{
tree elt;
bitmap label_bitmap;
+ int vl = TREE_VEC_LENGTH (vec);
/* cleanup_tree_cfg removes all SWITCH_EXPR with their index
expressions being INTEGER_CST. */
gcc_assert (TREE_CODE (index_expr) != INTEGER_CST);
- /* The default case is at the end of TREE_VEC. */
- elt = TREE_VEC_ELT (vec, TREE_VEC_LENGTH (vec) - 1);
- gcc_assert (!CASE_HIGH (elt));
- gcc_assert (!CASE_LOW (elt));
- default_label_decl = CASE_LABEL (elt);
+ /* The default case, if ever taken, is at the end of TREE_VEC. */
+ elt = TREE_VEC_ELT (vec, vl - 1);
+ if (!CASE_LOW (elt) && !CASE_HIGH (elt))
+ {
+ default_label_decl = CASE_LABEL (elt);
+ --vl;
+ }
- for (i = TREE_VEC_LENGTH (vec) - 1; --i >= 0; )
+ for (i = vl - 1; i >= 0; --i)
{
tree low, high;
elt = TREE_VEC_ELT (vec, i);
high = CASE_HIGH (elt);
/* Discard empty ranges. */
- if (high && INT_CST_LT (high, low))
+ if (high && tree_int_cst_lt (high, low))
continue;
case_list = add_case_node (case_list, index_type, low, high,
before_case = start = get_last_insn ();
- default_label = label_rtx (default_label_decl);
+ if (default_label_decl)
+ default_label = label_rtx (default_label_decl);
/* Get upper and lower bounds of case values. */
}
else
{
- if (INT_CST_LT (n->low, minval))
+ if (tree_int_cst_lt (n->low, minval))
minval = n->low;
- if (INT_CST_LT (maxval, n->high))
+ if (tree_int_cst_lt (maxval, n->high))
maxval = n->high;
}
/* A range counts double, since it requires two compares. */
type, so we may still get a zero here. */
if (count == 0)
{
- emit_jump (default_label);
+ if (default_label)
+ emit_jump (default_label);
free_alloc_pool (case_node_pool);
return;
}
else if (count < case_values_threshold ()
|| compare_tree_int (range,
- (optimize_size ? 3 : 10) * count) > 0
+ (optimize_insn_for_size_p () ? 3 : 10) * count) > 0
/* RANGE may be signed, and really large ranges will show up
as negative numbers. */
|| compare_tree_int (range, 0) < 0
&& estimate_case_costs (case_list));
balance_case_nodes (&case_list, NULL);
emit_case_nodes (index, case_list, default_label, index_type);
- emit_jump (default_label);
+ if (default_label)
+ emit_jump (default_label);
}
else
{
+ rtx fallback_label = label_rtx (case_list->code_label);
table_label = gen_label_rtx ();
if (! try_casesi (index_type, index_expr, minval, range,
- table_label, default_label))
+ table_label, default_label, fallback_label))
{
bool ok;
/* Index jumptables from zero for suitable values of
minval to avoid a subtraction. */
- if (! optimize_size
+ if (optimize_insn_for_speed_p ()
&& compare_tree_int (minval, 0) > 0
&& compare_tree_int (minval, 3) < 0)
{
/* Get table of labels to jump to, in order of case index. */
ncases = tree_low_cst (range, 0) + 1;
- labelvec = alloca (ncases * sizeof (rtx));
+ labelvec = XALLOCAVEC (rtx, ncases);
memset (labelvec, 0, ncases * sizeof (rtx));
for (n = case_list; n; n = n->right)
= gen_rtx_LABEL_REF (Pmode, label_rtx (n->code_label));
}
- /* Fill in the gaps with the default. */
+ /* Fill in the gaps with the default. We may have gaps at
+ the beginning if we tried to avoid the minval subtraction,
+ so substitute some label even if the default label was
+ deemed unreachable. */
+ if (!default_label)
+ default_label = fallback_label;
for (i = 0; i < ncases; i++)
if (labelvec[i] == 0)
labelvec[i] = gen_rtx_LABEL_REF (Pmode, default_label);
for (n = node; n; n = n->right)
{
- if ((INT_CST_LT (n->low, min_ascii)) || INT_CST_LT (max_ascii, n->high))
+ if (tree_int_cst_lt (n->low, min_ascii)
+ || tree_int_cst_lt (max_ascii, n->high))
return 0;
for (i = (HOST_WIDE_INT) TREE_INT_CST_LOW (n->low);
emit_case_nodes (index, node->left, default_label, index_type);
/* If left-hand subtree does nothing,
go to default. */
- emit_jump (default_label);
+ if (default_label)
+ emit_jump (default_label);
/* Code branches here for the right-hand subtree. */
expand_label (test_label);
{
/* If the left-hand subtree fell through,
don't let it fall into the right-hand subtree. */
- emit_jump (default_label);
+ if (default_label)
+ emit_jump (default_label);
expand_label (test_label);
emit_case_nodes (index, node->right, default_label, index_type);
OSDN Git Service
