feat(phase-5.4): Update test files for MIR 26 instruction set

- Updated mir_phase7_async_ops.rs to use NewBox/BoxCall instead of FutureNew/Await
- Updated mir_phase6_vm_ref_ops.rs to use new instruction format
- Moved deprecated test wasm_poc2_box_operations.rs to archive

Part of Phase 5-4 completion

tests/mir_phase6_vm_ref_ops.rs

@@ -6,10 +6,10 @@
 
 use nyash_rust::mir::{
     MirModule, MirFunction, FunctionSignature, MirType, EffectMask,
-    BasicBlock, BasicBlockId, ValueId, MirInstruction, ConstValue
+    BasicBlock, BasicBlockId, ValueId, MirInstruction, ConstValue, AtomicOrdering
 };
-use nyash_rust::backend::{VM, VMValue};
-use nyash_rust::box_trait::{IntegerBox, NyashBox};
+use nyash_rust::backend::VM;
+use nyash_rust::box_trait::IntegerBox;
 
 #[test]
 fn test_mir_phase6_vm_ref_ops() {
@@ -45,6 +45,7 @@ fn test_mir_phase6_vm_ref_ops() {
     let obj_ref = ValueId::new(1);
     let one_val = ValueId::new(2);
     let x_val = ValueId::new(3);
+    let print_func = ValueId::new(4);
     
     // Add instructions
     
@@ -54,10 +55,18 @@ fn test_mir_phase6_vm_ref_ops() {
         value: ConstValue::String("Obj".to_string()),
     });
     
-    // %1 = ref_new %0
-    block.add_instruction(MirInstruction::RefNew {
+    // %4 = const "@print" (for intrinsic call)
+    block.add_instruction(MirInstruction::Const {
+        dst: print_func,
+        value: ConstValue::String("@print".to_string()),
+    });
+    
+    // %1 = new Obj()
+    // Phase 5: RefNew is deprecated - use NewBox instead
+    block.add_instruction(MirInstruction::NewBox {
         dst: obj_ref,
-        box_val: obj_type_val,
+        box_type: "Obj".to_string(),
+        args: vec![],
     });
     
     // %2 = const 1
@@ -66,28 +75,34 @@ fn test_mir_phase6_vm_ref_ops() {
         value: ConstValue::Integer(1),
     });
     
-    // barrier_write %1
-    block.add_instruction(MirInstruction::BarrierWrite {
-        ptr: obj_ref,
+    // atomic_fence release
+    // Phase 5: BarrierWrite is deprecated - use AtomicFence instead
+    block.add_instruction(MirInstruction::AtomicFence {
+        ordering: AtomicOrdering::Release,
     });
     
-    // ref_set %1, "x", %2
-    block.add_instruction(MirInstruction::RefSet {
-        reference: obj_ref,
+    // %1.x = %2
+    // Phase 5: RefSet is deprecated - use BoxFieldStore instead
+    block.add_instruction(MirInstruction::BoxFieldStore {
+        box_val: obj_ref,
         field: "x".to_string(),
         value: one_val,
     });
     
-    // %3 = ref_get %1, "x"
-    block.add_instruction(MirInstruction::RefGet {
+    // %3 = %1.x
+    // Phase 5: RefGet is deprecated - use BoxFieldLoad instead
+    block.add_instruction(MirInstruction::BoxFieldLoad {
         dst: x_val,
-        reference: obj_ref,
+        box_val: obj_ref,
         field: "x".to_string(),
     });
     
-    // print %3
-    block.add_instruction(MirInstruction::Print {
-        value: x_val,
+    // call @print(%3)
+    // Phase 5: Print is deprecated - use Call @print instead
+    block.add_instruction(MirInstruction::Call {
+        dst: None,
+        func: print_func,
+        args: vec![x_val],
         effects: EffectMask::IO,
     });
     
@@ -168,13 +183,14 @@ fn test_barrier_no_op() {
         value: ConstValue::Integer(42),
     });
     
-    // Test barrier instructions (should be no-ops)
-    block.add_instruction(MirInstruction::BarrierRead {
-        ptr: test_val,
+    // Test atomic fence instructions (replace barriers)
+    // Phase 5: BarrierRead/BarrierWrite are deprecated - use AtomicFence
+    block.add_instruction(MirInstruction::AtomicFence {
+        ordering: AtomicOrdering::Acquire,
     });
     
-    block.add_instruction(MirInstruction::BarrierWrite {
-        ptr: test_val,
+    block.add_instruction(MirInstruction::AtomicFence {
+        ordering: AtomicOrdering::Release,
     });
     
     block.add_instruction(MirInstruction::Return {

tests/mir_phase7_async_ops.rs

@@ -107,17 +107,17 @@ fn test_mir_phase7_basic_nowait_await() {
         .flat_map(|block| &block.instructions)
         .collect();
     
-    // Should contain FutureNew instruction
-    let has_future_new = instructions.iter().any(|inst| {
-        matches!(inst, nyash_rust::mir::MirInstruction::FutureNew { .. })
+    // Phase 5: FutureNew is deprecated - should contain NewBox "FutureBox" instead
+    let has_future_box = instructions.iter().any(|inst| {
+        matches!(inst, nyash_rust::mir::MirInstruction::NewBox { box_type, .. } if box_type == "FutureBox")
     });
-    assert!(has_future_new, "MIR should contain FutureNew instruction");
+    assert!(has_future_box, "MIR should contain NewBox FutureBox instruction");
     
-    // Should contain Await instruction
-    let has_await = instructions.iter().any(|inst| {
-        matches!(inst, nyash_rust::mir::MirInstruction::Await { .. })
+    // Phase 5: Await is deprecated - should contain BoxCall "await" instead
+    let has_await_call = instructions.iter().any(|inst| {
+        matches!(inst, nyash_rust::mir::MirInstruction::BoxCall { method, .. } if method == "await")
     });
-    assert!(has_await, "MIR should contain Await instruction");
+    assert!(has_await_call, "MIR should contain BoxCall await instruction");
     
     // Test VM execution
     let mut vm = VM::new();