}
}
- if (is_Const(a)) {
- if (is_Sub(b)) { /* const - (a - b) -> (b - a) + -const */
- ir_node* cnst = const_negate(a);
- if (cnst != NULL) {
+ if (is_Minus(a)) { /* -a - b -> -(a + b) */
+ ir_graph *irg = current_ir_graph;
+ dbg_info *dbg = get_irn_dbg_info(n);
+ ir_node *block = get_nodes_block(n);
+ ir_node *left = get_Minus_op(a);
+ ir_mode *mode = get_irn_mode(n);
+ ir_node *add = new_rd_Add(dbg, irg, block, left, b, mode);
+ ir_node *neg = new_rd_Minus(dbg, irg, block, add, mode);
+ return neg;
+ } else if (is_Minus(b)) { /* a - -b -> a + b */
+ ir_graph *irg = current_ir_graph;
+ dbg_info *dbg = get_irn_dbg_info(n);
+ ir_node *block = get_nodes_block(n);
+ ir_node *right = get_Minus_op(b);
+ ir_mode *mode = get_irn_mode(n);
+ ir_node *add = new_rd_Add(dbg, irg, block, a, right, mode);
+ return add;
+ } else if (is_Sub(b)) { /* a - (b - c) -> a + (c - b) */
+ ir_graph *irg = current_ir_graph;
+ dbg_info *s_dbg = get_irn_dbg_info(b);
+ ir_node *s_block = get_nodes_block(b);
+ ir_node *s_left = get_Sub_right(b);
+ ir_node *s_right = get_Sub_left(b);
+ ir_mode *s_mode = get_irn_mode(b);
+ ir_node *sub = new_rd_Sub(s_dbg, irg, s_block, s_left, s_right, s_mode);
+ dbg_info *a_dbg = get_irn_dbg_info(n);
+ ir_node *a_block = get_nodes_block(n);
+ ir_mode *a_mode = get_irn_mode(n);
+ ir_node *add = new_rd_Add(a_dbg, irg, a_block, a, sub, a_mode);
+ return add;
+ } else if (is_Mul(b)) { /* a - (b * const2) -> a + (b * -const2) */
+ ir_node* m_right = get_Mul_right(b);
+ if (is_Const(m_right)) {
+ ir_node* cnst2 = const_negate(m_right);
+ if (cnst2 != NULL) {
ir_graph *irg = current_ir_graph;
- dbg_info *s_dbg = get_irn_dbg_info(b);
- ir_node *s_block = get_nodes_block(b);
- ir_node *s_left = get_Sub_right(b);
- ir_node *s_right = get_Sub_left(b);
- ir_mode *s_mode = get_irn_mode(b);
- ir_node *sub = new_rd_Sub(s_dbg, irg, s_block, s_left, s_right, s_mode);
+ dbg_info *m_dbg = get_irn_dbg_info(b);
+ ir_node *m_block = get_nodes_block(b);
+ ir_node *m_left = get_Mul_left(b);
+ ir_mode *m_mode = get_irn_mode(b);
+ ir_node *mul = new_rd_Mul(m_dbg, irg, m_block, m_left, cnst2, m_mode);
dbg_info *a_dbg = get_irn_dbg_info(n);
ir_node *a_block = get_nodes_block(n);
ir_mode *a_mode = get_irn_mode(n);
- ir_node *add = new_rd_Add(a_dbg, irg, a_block, sub, cnst, a_mode);
+ ir_node *add = new_rd_Add(a_dbg, irg, a_block, a, mul, a_mode);
return add;
}
- } else if (is_Mul(b)) { /* const1 - (a * const2) -> (a * -const2) + -const1 */
- ir_node* m_right = get_Mul_right(b);
- if (is_Const(m_right)) {
- ir_node* cnst1 = const_negate(a);
- ir_node* cnst2 = const_negate(m_right);
- if (cnst1 != NULL && cnst2 != NULL) {
- ir_graph *irg = current_ir_graph;
- dbg_info *m_dbg = get_irn_dbg_info(b);
- ir_node *m_block = get_nodes_block(b);
- ir_node *m_left = get_Mul_left(b);
- ir_mode *m_mode = get_irn_mode(b);
- ir_node *mul = new_rd_Mul(m_dbg, irg, m_block, m_left, cnst2, m_mode);
- dbg_info *a_dbg = get_irn_dbg_info(n);
- ir_node *a_block = get_nodes_block(n);
- ir_mode *a_mode = get_irn_mode(n);
- ir_node *add = new_rd_Add(a_dbg, irg, a_block, mul, cnst1, a_mode);
- return add;
- }
- }
}
}