+ exec_list default_case, after_default, tmp;
+
+ foreach_list_typed (ast_case_statement, case_stmt, link, & this->cases) {
+ case_stmt->hir(&tmp, state);
+
+ /* Default case. */
+ if (state->switch_state.previous_default && default_case.is_empty()) {
+ default_case.append_list(&tmp);
+ continue;
+ }
+
+ /* If default case found, append 'after_default' list. */
+ if (!default_case.is_empty())
+ after_default.append_list(&tmp);
+ else
+ instructions->append_list(&tmp);
+ }
+
+ /* Handle the default case. This is done here because default might not be
+ * the last case. We need to add checks against following cases first to see
+ * if default should be chosen or not.
+ */
+ if (!default_case.is_empty()) {
+
+ ir_rvalue *const true_val = new (state) ir_constant(true);
+ ir_dereference_variable *deref_run_default_var =
+ new(state) ir_dereference_variable(state->switch_state.run_default);
+
+ /* Choose to run default case initially, following conditional
+ * assignments might change this.
+ */
+ ir_assignment *const init_var =
+ new(state) ir_assignment(deref_run_default_var, true_val);
+ instructions->push_tail(init_var);
+
+ /* Default case was the last one, no checks required. */
+ if (after_default.is_empty()) {
+ instructions->append_list(&default_case);
+ return NULL;
+ }
+
+ foreach_in_list(ir_instruction, ir, &after_default) {
+ ir_assignment *assign = ir->as_assignment();
+
+ if (!assign)
+ continue;
+
+ /* Clone the check between case label and init expression. */
+ ir_expression *exp = (ir_expression*) assign->condition;
+ ir_expression *clone = exp->clone(state, NULL);
+
+ ir_dereference_variable *deref_var =
+ new(state) ir_dereference_variable(state->switch_state.run_default);
+ ir_rvalue *const false_val = new (state) ir_constant(false);
+
+ ir_assignment *const set_false =
+ new(state) ir_assignment(deref_var, false_val, clone);
+
+ instructions->push_tail(set_false);
+ }
+
+ /* Append default case and all cases after it. */
+ instructions->append_list(&default_case);
+ instructions->append_list(&after_default);
+ }