Example usage for org.objectweb.asm MethodVisitor visitInsn

Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitInsn.

Prototype

public void visitInsn(final int opcode)

Source Link

Document

Visits a zero operand instruction.

Usage

From source file:com.asakusafw.dag.compiler.codegen.AsmUtil.java

License:Apache License

/**
 * Adds an adapter constructor./*from  w w  w .  jav  a2s  . c om*/
 * @param writer the target class
 * @param superClass the super class
 * @param body the constructor body
 */
public static void defineAdapterConstructor(ClassWriter writer, Class<?> superClass,
        Consumer<MethodVisitor> body) {
    MethodVisitor method = writer.visitMethod(Opcodes.ACC_PUBLIC, CONSTRUCTOR_NAME,
            Type.getMethodDescriptor(Type.VOID_TYPE, typeOf(VertexProcessorContext.class)), null, null);
    method.visitVarInsn(Opcodes.ALOAD, 0);
    method.visitVarInsn(Opcodes.ALOAD, 1);
    method.visitMethodInsn(Opcodes.INVOKESPECIAL, typeOf(superClass).getInternalName(), CONSTRUCTOR_NAME,
            Type.getMethodDescriptor(Type.VOID_TYPE, typeOf(VertexProcessorContext.class)), false);
    body.accept(method);
    method.visitInsn(Opcodes.RETURN);
    method.visitMaxs(0, 0);
    method.visitEnd();
}

From source file:com.asakusafw.dag.compiler.codegen.AsmUtil.java

License:Apache License

/**
 * Adds a constant value on to the top of the stack.
 * @param method the current method visitor
 * @param value the target value//ww  w  .  j  a  v a2  s .co m
 */
public static void getConst(MethodVisitor method, Object value) {
    if (value == null) {
        method.visitInsn(Opcodes.ACONST_NULL);
    } else if (value instanceof Boolean) {
        getInt(method, ((Boolean) value).booleanValue() ? 1 : 0);
    } else if (value instanceof Byte) {
        getInt(method, ((Byte) value).byteValue());
    } else if (value instanceof Short) {
        getInt(method, ((Short) value).shortValue());
    } else if (value instanceof Character) {
        getInt(method, ((Character) value).charValue());
    } else if (value instanceof Integer) {
        getInt(method, ((Integer) value).intValue());
    } else if (value instanceof Long) {
        getLong(method, ((Long) value).longValue());
    } else if (value instanceof Float) {
        getFloat(method, ((Float) value).floatValue());
    } else if (value instanceof Double) {
        getDouble(method, ((Double) value).doubleValue());
    } else if (value instanceof ImmediateDescription) {
        getConst(method, ((ImmediateDescription) value).getValue());
    } else if (value instanceof EnumConstantDescription) {
        getEnumConstant(method, (EnumConstantDescription) value);
    } else if (value instanceof TypeDescription) {
        method.visitLdcInsn(typeOf((TypeDescription) value));
    } else {
        method.visitLdcInsn(value);
    }
}

From source file:com.asakusafw.dag.compiler.codegen.AsmUtil.java

License:Apache License

/**
 * Adds an array on to the top of the stack.
 * @param method the current method visitor
 * @param elementType the element type//  w  w w  . j  a va2s . c o m
 * @param values the array elements
 * @since 0.4.1
 */
public static void getArray(MethodVisitor method, Type elementType, Object[] values) {
    getInt(method, values.length);
    method.visitTypeInsn(Opcodes.ANEWARRAY, elementType.getInternalName());
    for (int index = 0; index < values.length; index++) {
        method.visitInsn(Opcodes.DUP);
        getInt(method, index);
        getConst(method, values[index]);
        method.visitInsn(Opcodes.AASTORE);
    }
}

From source file:com.asakusafw.dag.compiler.codegen.AsmUtil.java

License:Apache License

/**
 * Adds an array on to the top of the stack.
 * @param method the current method visitor
 * @param elementType the element type//from   w ww  . j  av a  2s.  c o m
 * @param values the array elements
 * @since 0.4.1
 */
public static void getArray(MethodVisitor method, Type elementType, LocalVarRef[] values) {
    getInt(method, values.length);
    method.visitTypeInsn(Opcodes.ANEWARRAY, elementType.getInternalName());
    for (int index = 0; index < values.length; index++) {
        method.visitInsn(Opcodes.DUP);
        getInt(method, index);
        values[index].load(method);
        method.visitInsn(Opcodes.AASTORE);
    }
}

From source file:com.asakusafw.dag.compiler.codegen.AsmUtil.java

License:Apache License

/**
 * Adds a value list on to the top of the stack.
 * @param method the current method visitor
 * @param values the array elements/*from  w w  w.  j  a  v  a2s .co  m*/
 */
public static void getList(MethodVisitor method, Collection<?> values) {
    getInt(method, values.size());
    method.visitTypeInsn(Opcodes.ANEWARRAY, typeOf(Object.class).getInternalName());
    int index = 0;
    for (Object value : values) {
        method.visitInsn(Opcodes.DUP);
        getInt(method, index++);
        getConst(method, value);
        method.visitInsn(Opcodes.AASTORE);
    }
    method.visitMethodInsn(Opcodes.INVOKESTATIC, typeOf(Arrays.class).getInternalName(), "asList",
            Type.getMethodDescriptor(typeOf(List.class), typeOf(Object[].class)), false);
}

From source file:com.asakusafw.dag.compiler.codegen.AsmUtil.java

License:Apache License

/**
 * Adds a constant value on to the top of the stack.
 * @param method the current method visitor
 * @param value the target value//from  w ww.j  a va 2 s. c  o m
 */
public static void getInt(MethodVisitor method, int value) {
    if (-1 <= value && value <= 5) {
        method.visitInsn(Opcodes.ICONST_0 + value);
    } else if (Byte.MIN_VALUE <= value && value <= Byte.MAX_VALUE) {
        method.visitIntInsn(Opcodes.BIPUSH, value);
    } else if (Short.MIN_VALUE <= value && value <= Short.MAX_VALUE) {
        method.visitIntInsn(Opcodes.SIPUSH, value);
    } else {
        method.visitLdcInsn(value);
    }
}

From source file:com.asakusafw.dag.compiler.codegen.AsmUtil.java

License:Apache License

/**
 * Adds a constant value on to the top of the stack.
 * @param method the current method visitor
 * @param value the target value/* w ww . j  a  va 2s  .co  m*/
 */
public static void getLong(MethodVisitor method, long value) {
    if (0L <= value && value <= 1L) {
        method.visitInsn((int) (Opcodes.LCONST_0 + value));
    } else {
        method.visitLdcInsn(value);
    }
}

From source file:com.asakusafw.dag.compiler.codegen.AsmUtil.java

License:Apache License

/**
 * Adds a constant value on to the top of the stack.
 * @param method the current method visitor
 * @param value the target value/*from  w ww. j a  v a2 s  .com*/
 */
public static void getFloat(MethodVisitor method, float value) {
    if (value == 0f || value == 1f || value == 2f) {
        method.visitInsn(Opcodes.FCONST_0 + (int) value);
    } else {
        method.visitLdcInsn(value);
    }
}

From source file:com.asakusafw.dag.compiler.codegen.AsmUtil.java

License:Apache License

/**
 * Adds a constant value on to the top of the stack.
 * @param method the current method visitor
 * @param value the target value/*  w w  w . j a v  a  2s . co  m*/
 */
public static void getDouble(MethodVisitor method, double value) {
    if (value == 0d || value == 1d) {
        method.visitInsn(Opcodes.DCONST_0 + (int) value);
    } else {
        method.visitLdcInsn(value);
    }
}

From source file:com.asakusafw.dag.compiler.codegen.AsmUtil.java

License:Apache License

/**
 * Adds an new instance of the target type on to the top of the stack.
 * @param method the current method visitor
 * @param type the target type/*  w  ww. j  ava2 s .c  o m*/
 */
public static void getNew(MethodVisitor method, TypeDescription type) {
    Type t = typeOf(type);
    method.visitTypeInsn(Opcodes.NEW, t.getInternalName());
    method.visitInsn(Opcodes.DUP);
    method.visitMethodInsn(Opcodes.INVOKESPECIAL, t.getInternalName(), CONSTRUCTOR_NAME,
            Type.getMethodDescriptor(Type.VOID_TYPE), false);
}