feat: fasm stack codegen beta

include/ir/ir.hpp

@@ -56,7 +56,7 @@ namespace IR
                 argRegs.Push(arg);
             }
             // TODO: gather return type of the function
-            auto dst = AllocateNamed<Instruction>(new ValueHandle::Type {ValueHandle::Type::Kind::Void});
+            auto dst = AllocateNamed<Instruction>(new ValueHandle::Type {ValueHandle::Type::Kind::Int});
             m_ops->Push(new CallOp(dst, fn->name(), argRegs.view()));
             return dst;
         }

include/ir/ops.hpp

@@ -82,6 +82,9 @@ namespace IR
             return sb.view();
         }
 
+    public:
+        const ValueHandle::Type *Type() const { return m_typ; }
+
     private:
         ValueHandle::Type *m_typ;
     };
@@ -103,6 +106,9 @@ namespace IR
             return sb.view();
         }
 
+    public:
+        const Pointer* Ptr() const { return m_ptr; }
+
     private:
         Pointer* m_ptr;
     };