stage2 支持左值的引用绑定

stage2/ir2vm.spl

@@ -456,20 +456,20 @@ fn cg_swap(cg: *Cgen) { emit(cg, .Swap, .Void, 0); }
 fn cg_gaddr(cg: *Cgen, idx: usize) { emit(cg, .Gaddr, .Void, idx); }
 
 fn cg_load_slot(cg: *Cgen, ref: usize, k: VmKind) {
-    cg_laddr(cg, slot_result(&cg.frame, ref));
-    cg_load(cg, k);
+    emit(cg, .Laddr, .Void, slot_result(&cg.frame, ref));
+    emit(cg, .Load, k, 0);
 }
 
 fn cg_store_slot(cg: *Cgen, ref: usize, k: VmKind) {
-    cg_laddr(cg, slot_result(&cg.frame, ref));
-    cg_swap(cg);
-    cg_store(cg, k);
+    emit(cg, .Laddr, .Void, slot_result(&cg.frame, ref));
+    emit(cg, .Swap, .Void, 0);
+    emit(cg, .Store, k, 0);
 }
 
 fn cg_store_at(cg: *Cgen, addr: usize, k: VmKind) {
-    cg_laddr(cg, addr);
-    cg_swap(cg);
-    cg_store(cg, k);
+    emit(cg, .Laddr, .Void, addr);
+    emit(cg, .Swap, .Void, 0);
+    emit(cg, .Store, k, 0);
 }
 
 type DataLoc = struct {