feat: 增强字节码显示

src/main/java/org/jcnc/snow/compiler/backend/util/OpHelper.java

@@ -22,6 +22,11 @@ public final class OpHelper {
      */
     private static final Map<String, String> OPCODE_MAP;
 
+    /**
+     * opcode 字符串 → 指令名 的静态映射表
+     */
+    private static final Map<Integer, String> OPCODE_NAME_MAP;
+
     static {
         Map<String, String> map = new HashMap<>();
         map.put("I_ADD", Integer.toString(VMOpCode.I_ADD));
@@ -127,6 +132,13 @@ public final class OpHelper {
         map.put("RET", Integer.toString(VMOpCode.RET));
         map.put("HALT", Integer.toString(VMOpCode.HALT));
         OPCODE_MAP = Collections.unmodifiableMap(map);
+
+        Map<Integer, String> revmap = new HashMap<>();  // reverse map
+        OPCODE_MAP.forEach((key, value) -> {
+            revmap.put(Integer.parseInt(value), key);
+        });
+
+        OPCODE_NAME_MAP = Collections.unmodifiableMap(revmap);
     }
 
     /**
@@ -170,5 +182,27 @@ public final class OpHelper {
         throw new IllegalStateException("Unknown const type: " + v.getClass());
     }
 
+    /**
+     * 根据 opcode 数值的字符串形式获取指令名
+     * @param code 字符串形式的 opcode 数值
+     * @return opcode 对应的指令名
+     */
+    public static String opcodeName(String code) {
+        return opcodeName(Integer.parseInt(code));
+    }
+
+    /**
+     * 根据 opcode 获取指令名
+     * @param code opcode
+     * @return opcode 对应的指令名
+     */
+    public static String opcodeName(int code) {
+        String name = OPCODE_NAME_MAP.get(code);
+        if (name == null) {
+            throw new IllegalStateException("Unknown opcode: " + name);
+        }
+        return name;
+    }
+
     // endregion
 }

src/main/java/org/jcnc/snow/pkg/tasks/CompileTask.java

@@ -1,7 +1,7 @@
 package org.jcnc.snow.pkg.tasks;
 
 import org.jcnc.snow.cli.commands.CompileCommand;
-import org.jcnc.snow.pkg.model.Project;
+import org.jcnc.snow.compiler.backend.util.OpHelper;
 import org.jcnc.snow.compiler.backend.alloc.RegisterAllocator;
 import org.jcnc.snow.compiler.backend.builder.VMCodeGenerator;
 import org.jcnc.snow.compiler.backend.builder.VMProgramBuilder;
@@ -18,6 +18,7 @@ import org.jcnc.snow.compiler.parser.context.ParserContext;
 import org.jcnc.snow.compiler.parser.core.ParserEngine;
 import org.jcnc.snow.compiler.parser.function.ASTPrinter;
 import org.jcnc.snow.compiler.semantic.core.SemanticAnalyzerRunner;
+import org.jcnc.snow.pkg.model.Project;
 import org.jcnc.snow.vm.VMLauncher;
 
 import java.nio.charset.StandardCharsets;
@@ -198,7 +199,12 @@ public final class CompileTask implements Task {
         List<String> finalCode = builder.build();
 
         System.out.println("### VM code");
-        finalCode.forEach(System.out::println);
+        for (int i = 0; i < finalCode.size(); i++) {
+            String[] parts = finalCode.get(i).split(" ");
+            String name = OpHelper.opcodeName(parts[0]);
+            parts = Arrays.copyOfRange(parts, 1, parts.length);
+            System.out.printf("%04d: %-10s %s\n", i, name, String.join(" ", parts));
+        }
 
         // ---------------- 5. 写出 .water 文件 ----------------
         Path outputFile = deriveOutputPath(sources, outputName, dir);