* This is a often needed case, so we handle here Confirm
* nodes too.
*/
-int value_not_zero(ir_node *n, ir_node **confirm) {
+int value_not_zero(ir_node *blk, ir_node *n, ir_node **confirm) {
#define RET_ON(x) if (x) { *confirm = n; return 1; }; break
tarval *tv;
ir_mode *mode = get_irn_mode(n);
pn_Cmp pnc;
+ if (get_irg_pinned(get_irn_irg(blk)) != op_pin_state_pinned)
+ blk = NULL;
+
*confirm = NULL;
- while (get_irn_op(n) == op_Confirm) {
+
+ /* there might be several Confirms one after other that form an interval */
+ for (; is_Confirm(n); n = get_Confirm_value(n)) {
+ unsigned long region = get_Confirm_region(n);
+
+ /* check if it's legal to use this confirm. */
+ if (region != 0) {
+ ir_node *curr_blk = get_irn_n(n, -1);
+
+ /* this confirm is bound to a region. */
+ if (! blk)
+ continue;
+
+ if (get_Block_exc_region(curr_blk) != region)
+ continue;
+ /* all went fine, the current Confirm belongs to the same region */
+ }
+
/*
* Note: A Confirm is never after a Const. So,
* we simply can check the bound for being a Const
default:
break;
}
-
- /* there might be several Confirms one after other that form an interval */
- n = get_Confirm_value(n);
}
tv = value_of(n);
* - A SymConst(entity) is NEVER a NULL pointer
* - Confirms are evaluated
*/
-int value_not_null(ir_node *n, ir_node **confirm) {
+int value_not_null(ir_node *blk, ir_node *n, ir_node **confirm) {
ir_op *op;
+ if (get_irg_pinned(get_irn_irg(blk)) != op_pin_state_pinned)
+ blk = NULL;
*confirm = NULL;
n = skip_Cast(n);
+
op = get_irn_op(n);
assert(mode_is_reference(get_irn_mode(n)));
if (get_opt_sel_based_null_check_elim()) {
if (tv != tarval_bad && classify_tarval(tv) != TV_CLASSIFY_NULL)
return 1;
- } else if (op == op_Confirm) {
- if (get_Confirm_cmp(n) == pn_Cmp_Lg &&
- classify_Const(get_Confirm_bound(n)) == CNST_NULL) {
- *confirm = n;
- return 1;
+ } else {
+ for (; is_Confirm(n); n = skip_Cast(get_Confirm_value(n))) {
+ unsigned long region = get_Confirm_region(n);
+
+ /* check if it's legal to use this confirm. */
+ if (region != 0) {
+ ir_node *curr_blk = get_irn_n(n, -1);
+
+ /* this confirm is bound to a region. */
+ if (! blk)
+ continue;
+
+ if (get_Block_exc_region(curr_blk) != region)
+ continue;
+ /* all went fine, the current Confirm belongs to the same region */
+ }
+
+ if (get_Confirm_cmp(n) == pn_Cmp_Lg &&
+ classify_Const(get_Confirm_bound(n)) == CNST_NULL) {
+ *confirm = n;
+ return 1;
+ }
}
}
return 0;
return (pn_Cmp_False < pnc && pnc < pn_Cmp_Lg);
} /* is_transitive */
+/**
+ * returns a confirm node starting from n that is allowed to be used in the exception
+ * region.
+ *
+ * @param region the exception region
+ * @param n the node
+ */
+static ir_node *get_allowed_confirm(unsigned long region, ir_node *n) {
+ for (; is_Confirm(n); n = get_Confirm_value(n)) {
+ unsigned long reg = get_Confirm_region(n);
+
+ if (reg == 0 || reg == region) {
+ /* found an allowed Confirm */
+ return n;
+ }
+
+ }
+ return NULL;
+} /* get_allowed_confirm */
/**
* Return the value of a Cmp if one or both predecessors
* @param pnc the compare relation
*/
tarval *computed_value_Cmp_Confirm(ir_node *cmp, ir_node *left, ir_node *right, pn_Cmp pnc) {
- ir_node *l_bound;
- pn_Cmp l_pnc, res_pnc, neg_pnc;
- interval_t l_iv, r_iv;
- tarval *tv;
- ir_mode *mode;
+ ir_node *l_bound, *confirm;
+ pn_Cmp l_pnc, res_pnc, neg_pnc;
+ interval_t l_iv, r_iv;
+ tarval *tv;
+ ir_mode *mode;
+ unsigned long region;
- if (get_irn_op(right) == op_Confirm) {
- ir_node *t;
+ /* Cmp is pinned, so this always gives the right exception region. */
+ region = get_Block_exc_region(get_nodes_block(cmp));
+ if ((confirm = get_allowed_confirm(region, right)) != NULL) {
/* we want the Confirm on the left side */
- t = left;
- left = right;
- right = t;
+ right = left;
+ left = confirm;
pnc = get_inversed_pnc(pnc);
- } else if (get_irn_op(left) != op_Confirm) {
+ } else if ((confirm = get_allowed_confirm(region, left)) != NULL) {
+ left = confirm;
+ } else {
/* no Confirm on either one side, finish */
return tarval_bad;
}
l_bound = get_Confirm_bound(left);
l_pnc = get_Confirm_cmp(left);
- if (get_irn_op(right) == op_Confirm) {
+ if (is_Confirm(right)) {
/*
- * both sides are Confirm's. Check some rare cases first.
- */
+ * both sides are Confirm's. Check some rare cases first.
+ */
ir_node *r_bound = get_Confirm_bound(right);
- pn_Cmp r_pnc = get_Confirm_cmp(right);
+ pn_Cmp r_pnc = get_Confirm_cmp(right);
/*
- * some check can be made WITHOUT constant bounds
- */
+ * some check can be made WITHOUT constant bounds
+ */
if (r_bound == l_bound) {
if (is_transitive(l_pnc)) {
pn_Cmp r_inc_pnc = get_inversed_pnc(r_pnc);
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