/* This must be a signed type, and non-ANSI compilers lack signed char. */
static short cost_table_[129];
-static short *cost_table;
static int use_cost_table;
+static int cost_table_initialized;
+
+/* Special care is needed because we allow -1, but TREE_INT_CST_LOW
+ is unsigned. */
+#define COST_TABLE(I) cost_table_[(unsigned HOST_WIDE_INT)((I) + 1)]
\f
/* Stack of control and binding constructs we are currently inside.
{
struct function *p = find_function_data (context);
rtx label_ref = gen_rtx_LABEL_REF (Pmode, label_rtx (label));
- rtx handler_slot, static_chain, save_area;
+ rtx handler_slot, static_chain, save_area, insn;
tree link;
/* Find the corresponding handler slot for this label. */
emit_insn (gen_rtx_USE (VOIDmode, stack_pointer_rtx));
emit_indirect_jump (handler_slot);
}
+
+ /* Search backwards to the jump insn and mark it as a
+ non-local goto. */
+ for (insn = get_last_insn ();
+ GET_CODE (insn) != JUMP_INSN;
+ insn = PREV_INSN (insn))
+ continue;
+ REG_NOTES (insn) = alloc_EXPR_LIST (REG_NON_LOCAL_GOTO, const0_rtx,
+ REG_NOTES (insn));
}
else
expand_goto_internal (label, label_rtx (label), NULL_RTX);
|| GET_CODE (op) == CONCAT)
{
tree type = TREE_TYPE (TREE_VALUE (tail));
- rtx memloc = assign_temp (type, 1, 1, 1);
+ tree qual_type = build_qualified_type (type,
+ (TYPE_QUALS (type)
+ | TYPE_QUAL_CONST));
+ rtx memloc = assign_temp (qual_type, 1, 1, 1);
emit_move_insn (memloc, op);
op = memloc;
if (VOID_TYPE_P (TREE_TYPE (exp)))
return 0;
+ /* If this is an expression with side effects, don't warn. */
+ if (TREE_SIDE_EFFECTS (exp))
+ return 0;
+
switch (TREE_CODE (exp))
{
case PREINCREMENT_EXPR:
&& TREE_THIS_VOLATILE (exp))
return 0;
- /* If this is an expression with side effects, don't warn. */
- if (TREE_SIDE_EFFECTS (exp))
- return 0;
-
/* If this is an expression which has no operands, there is no value
to be unused. There are no such language-independent codes,
but front ends may define such. */
rtx result_val = expand_expr (retval_rhs, NULL_RTX, VOIDmode, 0);
enum machine_mode tmpmode, result_reg_mode;
+ if (bytes == 0)
+ {
+ expand_null_return ();
+ return;
+ }
+
/* Structures whose size is not a multiple of a word are aligned
to the least significant byte (to the right). On a BYTES_BIG_ENDIAN
machine, this means we must skip the empty high order bytes when
/* Find the smallest integer mode large enough to hold the
entire structure and use that mode instead of BLKmode
on the USE insn for the return register. */
- bytes = int_size_in_bytes (TREE_TYPE (retval_rhs));
for (tmpmode = GET_CLASS_NARROWEST_MODE (MODE_INT);
tmpmode != VOIDmode;
tmpmode = GET_MODE_WIDER_MODE (tmpmode))
- {
- /* Have we found a large enough mode? */
- if (GET_MODE_SIZE (tmpmode) >= bytes)
- break;
- }
+ /* Have we found a large enough mode? */
+ if (GET_MODE_SIZE (tmpmode) >= bytes)
+ break;
/* No suitable mode found. */
if (tmpmode == VOIDmode)
{
/* Calculate the return value into a temporary (usually a pseudo
reg). */
- val = assign_temp (TREE_TYPE (DECL_RESULT (current_function_decl)),
- 0, 0, 1);
+ tree ot = TREE_TYPE (DECL_RESULT (current_function_decl));
+ tree nt = build_qualified_type (ot, TYPE_QUALS (ot) | TYPE_QUAL_CONST);
+
+ val = assign_temp (nt, 0, 0, 1);
val = expand_expr (retval_rhs, val, GET_MODE (val), 0);
val = force_not_mem (val);
emit_queue ();
if (type == error_mark_node)
DECL_RTL (decl) = gen_rtx_MEM (BLKmode, const0_rtx);
+
else if (DECL_SIZE (decl) == 0)
/* Variable with incomplete type. */
{
if (DECL_INITIAL (decl) == 0)
/* Error message was already done; now avoid a crash. */
- DECL_RTL (decl) = assign_stack_temp (DECL_MODE (decl), 0, 1);
+ DECL_RTL (decl) = gen_rtx_MEM (BLKmode, const0_rtx);
else
/* An initializer is going to decide the size of this array.
Until we know the size, represent its address with a reg. */
}
}
- /* Add this label to the chain, and succeed.
- Copy LOW, HIGH so they are on temporary rather than momentary
- obstack and will thus survive till the end of the case statement. */
+ /* Add this label to the chain, and succeed. */
r = (struct case_node *) xmalloc (sizeof (struct case_node));
- r->low = copy_node (low);
+ r->low = low;
/* If the bounds are equal, turn this into the one-value case. */
if (tree_int_cst_equal (low, high))
r->high = r->low;
else
- r->high = copy_node (high);
+ r->high = high;
r->code_label = label;
expand_label (label);
estimate_case_costs (node)
case_node_ptr node;
{
- tree min_ascii = build_int_2 (-1, -1);
+ tree min_ascii = integer_minus_one_node;
tree max_ascii = convert (TREE_TYPE (node->high), build_int_2 (127, 0));
case_node_ptr n;
int i;
/* If we haven't already made the cost table, make it now. Note that the
lower bound of the table is -1, not zero. */
- if (cost_table == NULL)
+ if (! cost_table_initialized)
{
- cost_table = cost_table_ + 1;
+ cost_table_initialized = 1;
for (i = 0; i < 128; i++)
{
if (ISALNUM (i))
- cost_table[i] = 16;
+ COST_TABLE (i) = 16;
else if (ISPUNCT (i))
- cost_table[i] = 8;
+ COST_TABLE (i) = 8;
else if (ISCNTRL (i))
- cost_table[i] = -1;
+ COST_TABLE (i) = -1;
}
- cost_table[' '] = 8;
- cost_table['\t'] = 4;
- cost_table['\0'] = 4;
- cost_table['\n'] = 2;
- cost_table['\f'] = 1;
- cost_table['\v'] = 1;
- cost_table['\b'] = 1;
+ COST_TABLE (' ') = 8;
+ COST_TABLE ('\t') = 4;
+ COST_TABLE ('\0') = 4;
+ COST_TABLE ('\n') = 2;
+ COST_TABLE ('\f') = 1;
+ COST_TABLE ('\v') = 1;
+ COST_TABLE ('\b') = 1;
}
/* See if all the case expressions look like text. It is text if the
for (i = (HOST_WIDE_INT) TREE_INT_CST_LOW (n->low);
i <= (HOST_WIDE_INT) TREE_INT_CST_LOW (n->high); i++)
- if (cost_table[i] < 0)
+ if (COST_TABLE (i) < 0)
return 0;
}
{
ranges++;
if (use_cost_table)
- cost += cost_table[TREE_INT_CST_LOW (np->high)];
+ cost += COST_TABLE (TREE_INT_CST_LOW (np->high));
}
if (use_cost_table)
- cost += cost_table[TREE_INT_CST_LOW (np->low)];
+ cost += COST_TABLE (TREE_INT_CST_LOW (np->low));
i++;
np = np->right;
{
/* Skip nodes while their cost does not reach that amount. */
if (!tree_int_cst_equal ((*npp)->low, (*npp)->high))
- i -= cost_table[TREE_INT_CST_LOW ((*npp)->high)];
- i -= cost_table[TREE_INT_CST_LOW ((*npp)->low)];
+ i -= COST_TABLE (TREE_INT_CST_LOW ((*npp)->high));
+ i -= COST_TABLE (TREE_INT_CST_LOW ((*npp)->low));
if (i <= 0)
break;
npp = &(*npp)->right;
a branch-greater-than will get us to the default
label correctly. */
if (use_cost_table
- && cost_table[TREE_INT_CST_LOW (node->high)] < 12)
+ && COST_TABLE (TREE_INT_CST_LOW (node->high)) < 12)
;
#endif /* 0 */
if (node->left->left || node->left->right
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