+ ast_expression_codegen *cgen;
+
+ ir_value *condval;
+ ir_value *dummy;
+
+ ir_block *cond = func->curblock;
+ ir_block *ontrue;
+ ir_block *onfalse;
+ ir_block *merge;
+
+ /* We don't output any value, thus also don't care about r/lvalue */
+ (void)out;
+ (void)lvalue;
+
+ /* create blocks first, it's nicer if they're ordered */
+
+ if (self->on_true) {
+ /* create on-true block */
+ ontrue = ir_function_create_block(func->ir_func, ast_function_label(func, "ontrue"));
+ if (!ontrue)
+ return false;
+ } else
+ ontrue = NULL;
+
+ if (self->on_false) {
+ /* create on-false block */
+ onfalse = ir_function_create_block(func->ir_func, ast_function_label(func, "onfalse"));
+ if (!onfalse)
+ return false;
+ } else
+ onfalse = NULL;
+
+ merge = ir_function_create_block(func->ir_func, ast_function_label(func, "endif"));
+ if (!merge)
+ return NULL;
+
+ /* generate the condition */
+ func->curblock = cond;
+ cgen = self->cond->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->cond), func, false, &condval))
+ return false;
+
+ if (!ir_block_create_if(cond, condval,
+ (ontrue ? ontrue : merge),
+ (onfalse ? onfalse : merge)))
+ {
+ return false;
+ }
+
+ /* on-true path */
+ if (ontrue) {
+ /* enter the block */
+ func->curblock = ontrue;
+
+ /* generate */
+ cgen = self->on_true->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->on_true), func, false, &dummy))
+ return false;
+
+ /* jump to merge block */
+ if (!ir_block_create_jump(ontrue, merge))
+ return false;
+ }
+
+ /* on-false path */
+ if (onfalse) {
+ /* enter the block */
+ func->curblock = onfalse;
+
+ /* generate */
+ cgen = self->on_false->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->on_false), func, false, &dummy))
+ return false;
+
+ /* jump to merge block */
+ if (!ir_block_create_jump(ontrue, merge))
+ return false;
+ }
+
+ /* Now enter the merge block */
+ func->curblock = merge;
+
+ return true;
+}
+
+bool ast_ternary_codegen(ast_ternary *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+
+ ir_value *condval;
+ ir_value *trueval, *falseval;
+ ir_instr *phi;
+
+ ir_block *cond = func->curblock;
+ ir_block *ontrue;
+ ir_block *onfalse;
+ ir_block *merge;
+
+ /* In theory it shouldn't be possible to pass through a node twice, but
+ * in case we add any kind of optimization pass for the AST itself, it
+ * may still happen, thus we remember a created ir_value and simply return one
+ * if it already exists.
+ */
+ if (self->phi_out) {
+ *out = self->phi_out;
+ return true;
+ }
+
+ /* Ternary can never create an lvalue... */
+ if (lvalue)
+ return false;
+
+ /* In the following, contraty to ast_ifthen, we assume both paths exist. */
+
+ /* create on-true block */
+ ontrue = ir_function_create_block(func->ir_func, ast_function_label(func, "tern_T"));
+ if (!ontrue)
+ return false;
+
+ /* create on-false block */
+ onfalse = ir_function_create_block(func->ir_func, ast_function_label(func, "tern_F"));
+ if (!onfalse)
+ return false;
+
+ merge = ir_function_create_block(func->ir_func, ast_function_label(func, "tern_out"));
+ if (!merge)
+ return NULL;
+
+ /* generate the condition */
+ func->curblock = cond;
+ cgen = self->cond->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->cond), func, false, &condval))
+ return false;
+
+ if (!ir_block_create_if(cond, condval, ontrue, onfalse))
+ return false;
+
+ /* on-true path */
+ /* enter the block */
+ func->curblock = ontrue;
+
+ /* generate */
+ cgen = self->on_true->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->on_true), func, false, &trueval))
+ return false;
+
+ /* jump to merge block */
+ if (!ir_block_create_jump(ontrue, merge))
+ return false;
+
+ /* on-false path */
+ /* enter the block */
+ func->curblock = onfalse;
+
+ /* generate */
+ cgen = self->on_false->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->on_false), func, false, &falseval))
+ return false;
+
+ /* jump to merge block */
+ if (!ir_block_create_jump(ontrue, merge))
+ return false;
+
+ /* Now enter the merge block */
+ func->curblock = merge;
+
+ /* Here, now, we need a PHI node
+ * but first some sanity checking...
+ */
+ if (trueval->vtype != falseval->vtype) {
+ /* error("ternary with different types on the two sides"); */
+ return false;
+ }
+
+ /* create PHI */
+ phi = ir_block_create_phi(merge, ast_function_label(func, "phi"), trueval->vtype);
+ if (!phi ||
+ !ir_phi_add(phi, ontrue, trueval) ||
+ !ir_phi_add(phi, onfalse, falseval))
+ {
+ return false;
+ }
+
+ self->phi_out = ir_phi_value(phi);
+ *out = self->phi_out;
+
+ return true;