Commit 73ed3cd4 by Michael Beck

### Add a rule to transform x .op. (x .op. y) into y .op. (x .op. x) for...

```Add a rule to transform x .op. (x .op. y) into y .op. (x .op. x) for commutative nodes. This finally "fixes" codegen/lea.c and might be usefull for and,or,xor as well.

[r26980]```
parent 802484dd
 ... ... @@ -222,7 +222,7 @@ static ir_mode *get_mode_from_ops(ir_node *op1, ir_node *op2) static int reassoc_commutative(ir_node **node) { ir_node *n = *node; ir_op *op = get_irn_op(n); ir_op *op = get_irn_op(n); ir_node *block = get_nodes_block(n); ir_node *t1, *c1; ... ... @@ -306,6 +306,55 @@ static int reassoc_commutative(ir_node **node) } } } if (get_irn_op(c1) == op) { ir_node *t = c1; c1 = t1; t1 = t; } if (get_irn_op(t1) == op) { ir_node *l = get_binop_left(t1); ir_node *r = get_binop_right(t1); const_class_t c_r; if (r == c1) { ir_node *t = r; r = l; l = t; } c_r = get_const_class(r, block); if (c_r != NO_CONSTANT) { /* * Beware: don't do the following op if a constant was * placed below, else we will fall into a loop. */ return 0; } if (l == c1) { /* convert x .OP. (x .OP. y) => y .OP. (x .OP. x) */ ir_mode *mode_res = get_irn_mode(n); ir_mode *mode_c1 = get_irn_mode(c1); ir_node *irn, *in[2]; in[0] = c1; in[1] = c1; in[1] = optimize_node(new_ir_node(NULL, current_ir_graph, block, op, mode_c1, 2, in)); in[0] = r; irn = optimize_node(new_ir_node(NULL, current_ir_graph, block, op, mode_res, 2, in)); DBG((dbg, LEVEL_5, "Applied: %n .%s. (%n .%s. %n) => %n .%s. (%n .%s. %n)\n", c1, get_irn_opname(n), l, get_irn_opname(n), r, r, get_irn_opname(n), c1, get_irn_opname(n), c1)); if (n != irn) { exchange(n, irn); *node = irn; return 1; } } } return 0; } /* reassoc_commutative */ ... ...
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