src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.amd64/src/org/graalvm/compiler/core/amd64/AMD64LIRKindTool.java

@@ -26,11 +26,11 @@
 import org.graalvm.compiler.core.common.spi.LIRKindTool;
 import org.graalvm.compiler.debug.GraalError;
 
 import jdk.vm.ci.amd64.AMD64Kind;
 
-public class AMD64LIRKindTool implements LIRKindTool {
+public abstract class AMD64LIRKindTool implements LIRKindTool {
 
     @Override
     public LIRKind getIntegerKind(int bits) {
         if (bits <= 8) {
             return LIRKind.value(AMD64Kind.BYTE);

@@ -65,14 +65,10 @@
     public LIRKind getWordKind() {
         return LIRKind.value(AMD64Kind.QWORD);
     }
 
     @Override
-    public LIRKind getNarrowOopKind() {
-        return LIRKind.reference(AMD64Kind.DWORD);
-    }
+    public abstract LIRKind getNarrowOopKind();
 
     @Override
-    public LIRKind getNarrowPointerKind() {
-        return LIRKind.value(AMD64Kind.DWORD);
-    }
+    public abstract LIRKind getNarrowPointerKind();
 }