* This is a often needed case, so we handle here Confirm
* nodes too.
*/
-int value_not_zero(ir_node *blk, ir_node *n, ir_node **confirm) {
+int value_not_zero(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;
/* 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
* - A SymConst(entity) is NEVER a NULL pointer
* - Confirms are evaluated
*/
-int value_not_null(ir_node *blk, ir_node *n, ir_node **confirm) {
+int value_not_null(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);
if (op == op_SymConst && get_SymConst_kind(n) == symconst_addr_ent)
return 1;
if (op == op_Const) {
- tarval *tv = get_Const_tarval(n);
-
- if (tv != tarval_bad && classify_tarval(tv) != TV_CLASSIFY_NULL)
+ if (!is_Const_null(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) {
+ if (get_Confirm_cmp(n) != pn_Cmp_Lg) {
+ ir_node *bound = get_Confirm_bound(n);
+ if (is_Const(bound) && is_Const_null(bound)) {
*confirm = n;
return 1;
+ }
}
}
}
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
* are Confirm nodes.
* @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, *confirm;
- pn_Cmp l_pnc, res_pnc, neg_pnc;
- interval_t l_iv, r_iv;
- tarval *tv;
- ir_mode *mode;
- unsigned long region;
+ ir_node *l_bound;
+ pn_Cmp l_pnc, res_pnc, neg_pnc;
+ interval_t l_iv, r_iv;
+ tarval *tv;
+ ir_mode *mode;
- /* 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) {
+ if (is_Confirm(right)) {
/* we want the Confirm on the left side */
+ ir_node *t = right;
right = left;
- left = confirm;
+ left = t;
pnc = get_inversed_pnc(pnc);
- } else if ((confirm = get_allowed_confirm(region, left)) != NULL) {
- left = confirm;
- } else {
+ } else if (! is_Confirm(left)) {
/* no Confirm on either one side, finish */
return tarval_bad;
}