Preventing duplicate field access

testData/src/pkg/TestFieldSingleAccess.jasm

@@ -0,0 +1,67 @@
+/**
+ * This code can be assembled with <a href="https://wiki.openjdk.java.net/display/CodeTools/asmtools">asmtools</a>
+ * using <code>asmtools jasm -g *.jasm</code> command line.
+ */
+package  pkg;
+
+super public final class TestFieldSingleAccess
+	version 52:0
+{
+
+public Field field:"Ljava/lang/Integer;";
+
+public Method "<init>":"()V"
+	stack 1 locals 1
+{
+		aload_0;
+		invokespecial	Method java/lang/Object."<init>":"()V";
+		return;
+}
+
+public final Method test:"()V"
+	stack 2 locals 1
+{
+		aload_0;
+		getfield	Field field:"Ljava/lang/Integer;";
+		dup;
+		ifnull	L17;
+		getstatic	Field java/lang/System.out:"Ljava/io/PrintStream;";
+		swap;
+		invokevirtual	Method java/io/PrintStream.println:"(Ljava/lang/Object;)V";
+	L17:	stack_frame_type same;
+		return;
+}
+
+public final Method test1:"()V"
+	stack 2 locals 3
+{
+		aload_0;
+		getfield	Field field:"Ljava/lang/Integer;";
+		dup;
+		astore_1;
+		monitorenter;
+		try t0;
+		getstatic	Field java/lang/System.out:"Ljava/io/PrintStream;";
+		bipush	49;
+		invokevirtual	Method java/io/PrintStream.println:"(C)V";
+		aload_1;
+		monitorexit;
+		endtry t0;
+		goto	L25;
+		catch t0 #0;
+		catch t1 #0;
+		try t1;
+		stack_frame_type full;
+		locals_map class TestFieldSingleAccess, class java/lang/Object;
+		stack_map class java/lang/Throwable;
+		astore_2;
+		aload_1;
+		monitorexit;
+		endtry t1;
+		aload_2;
+		athrow;
+	L25:	stack_frame_type chop1;
+		return;
+}
+
+} // end Class TestFieldSingleAccess