- int arity = get_Psi_n_conds(psi);
- int new_arity;
- ir_node** conds;
- ir_node** vals;
- ir_node* cond;
- ir_node* val;
- int i;
- int j;
- ir_node* new_psi;
-
- new_arity = 1;
- val = get_Psi_val(psi, 0);
- DB((dbg, LEVEL_1, "Pred 0 of %+F is %+F\n", psi, val));
- for (i = 1; i < arity; ++i) {
- ir_node* v = get_Psi_val(psi, i);
- DB((dbg, LEVEL_1, "Pred %2d of %+F is %+F\n", i, psi, v));
- if (val != v) {
- val = v;
- ++new_arity;
- }
- }
- DB((dbg, LEVEL_1, "Default of %+F is %+F\n", psi, get_Psi_default(psi)));
- if (val == get_Psi_default(psi)) --new_arity;
-
- DB((dbg, LEVEL_1, "Melding Psi %+F from %d conds to %d\n", psi, arity, new_arity));
-
- if (new_arity == arity) return psi;
-
- /* If all data inputs of the Psi are equal, exchange the Psi with that value */
- if (new_arity == 0) {
- exchange(psi, val);
- return val;
- }
-
- NEW_ARR_A(ir_node *, conds, new_arity);
- NEW_ARR_A(ir_node *, vals, new_arity + 1);
- cond = get_Psi_cond(psi, 0);
- val = get_Psi_val(psi, 0);
- j = 0;
- for (i = 1; i < arity; ++i) {
- ir_node* v = get_Psi_val(psi, i);
-
- if (v == val) {
- cond = new_r_Or(
- current_ir_graph, get_nodes_block(psi),
- cond, get_Psi_cond(psi, i), mode_b
- );
- } else {
- conds[j] = cond;
- vals[j] = val;
- ++j;
- val = v;
- }
- }
- if (val != get_Psi_default(psi)) {
- conds[j] = cond;
- vals[j] = val;
- ++j;
- }
- vals[j] = get_Psi_default(psi);
- assert(j == new_arity);
- new_psi = new_r_Psi(
- current_ir_graph, get_nodes_block(psi),
- new_arity, conds, vals, get_irn_mode(psi)
- );
- DB((dbg, LEVEL_1, "Molded %+F into %+F\n", psi, new_psi));
- exchange(psi, new_psi);
- return new_psi;
-}
-
-
-/**
- * Split a Psi with multiple conditions into multiple Psis with one condtition
- * each
- */
-static ir_node* split_psi(ir_node* psi)
-{
- int arity = get_Psi_n_conds(psi);
- ir_mode* mode;
- ir_node* block;
- ir_node* rval;
- int i;
-
- if (arity == 1) return psi;
-
- mode = get_irn_mode(psi);
- block = get_nodes_block(psi);
- rval = get_Psi_default(psi);
- for (i = arity - 1; i >= 0; --i) {
- ir_node* conds[1];
- ir_node* vals[2];
-
- conds[0] = get_Psi_cond(psi, i);
- vals[0] = get_Psi_val(psi, i);
- vals[1] = rval;
- rval = new_r_Psi(
- current_ir_graph, block, 1, conds, vals, mode
- );
- }
- exchange(psi, rval);
- return rval;
-}
-
-
-static void optimise_psis(ir_node* node, void* env)
-{
- (void) env;
-
- if (get_irn_op(node) != op_Psi) return;
-#if 1
- node = fold_psi(node);
-#endif
-#if 1
- node = meld_psi(node);
-#endif
-#if 1
- node = split_psi(node);
-#endif
-}
-
-
-void opt_if_conv(ir_graph *irg, const opt_if_conv_info_t *params)
-{
- struct obstack obst;
- opt_if_conv_info_t p;
-
- if (! get_opt_if_conversion())
- return;