Example usage for org.objectweb.asm Opcodes ICONST_0

Introduction

In this page you can find the example usage for org.objectweb.asm Opcodes ICONST_0.

Prototype

int ICONST_0

To view the source code for org.objectweb.asm Opcodes ICONST_0.

Click Source Link

Usage

From source file:org.glassfish.pfl.tf.spi.Util.java

License:Open Source License

public void emitIntConstant(MethodVisitor mv, int val) {
    info(2, "Emitting constant " + val);
    if (val <= 5) {
        switch (val) {
        case 0:// w  w  w . jav  a 2  s  . c  om
            mv.visitInsn(Opcodes.ICONST_0);
            break;
        case 1:
            mv.visitInsn(Opcodes.ICONST_1);
            break;
        case 2:
            mv.visitInsn(Opcodes.ICONST_2);
            break;
        case 3:
            mv.visitInsn(Opcodes.ICONST_3);
            break;
        case 4:
            mv.visitInsn(Opcodes.ICONST_4);
            break;
        case 5:
            mv.visitInsn(Opcodes.ICONST_5);
            break;
        }
    } else {
        mv.visitLdcInsn(val);
    }
}

---

From source file:org.gradle.model.internal.manage.schema.extract.ManagedProxyClassGenerator.java

License:Apache License

private void writeConfigureMethod(ClassVisitor visitor, Type generatedType, ModelProperty<?> property,
        boolean writable) {
    if (!writable && property.getSchema() instanceof CompositeSchema) {
        // Adds a void $propName(Closure<?> cl) method that delegates to model state

        MethodVisitor methodVisitor = declareMethod(visitor, property.getName(),
                Type.getMethodDescriptor(Type.VOID_TYPE, CLOSURE_TYPE), null);
        putNodeStateFieldValueOnStack(methodVisitor, generatedType);
        putConstantOnStack(methodVisitor, property.getName());
        putFirstMethodArgumentOnStack(methodVisitor);
        methodVisitor.visitMethodInsn(INVOKEINTERFACE, MODEL_ELEMENT_STATE_TYPE_INTERNAL_NAME, "apply",
                STATE_APPLY_METHOD_DESCRIPTOR, true);
        finishVisitingMethod(methodVisitor);
        return;//w  w w.  jav  a2 s .  c om
    }
    if (!writable && property.getSchema() instanceof UnmanagedImplStructSchema) {
        UnmanagedImplStructSchema<?> structSchema = (UnmanagedImplStructSchema<?>) property.getSchema();
        if (!structSchema.isAnnotated()) {
            return;
        }

        // Adds a void $propName(Closure<?> cl) method that executes the closure
        MethodVisitor methodVisitor = declareMethod(visitor, property.getName(),
                Type.getMethodDescriptor(Type.VOID_TYPE, CLOSURE_TYPE), null);
        putThisOnStack(methodVisitor);
        methodVisitor.visitMethodInsn(INVOKEVIRTUAL, generatedType.getInternalName(),
                property.getGetter().getName(),
                Type.getMethodDescriptor(Type.getType(property.getType().getConcreteClass())), false);
        putFirstMethodArgumentOnStack(methodVisitor);
        methodVisitor.visitMethodInsn(INVOKESTATIC, Type.getInternalName(ClosureBackedAction.class), "execute",
                Type.getMethodDescriptor(Type.VOID_TYPE, OBJECT_TYPE, CLOSURE_TYPE), false);
        finishVisitingMethod(methodVisitor);
        return;
    }

    // Adds a void $propName(Closure<?> cl) method that throws MME, to avoid attempts to convert closure to something else
    MethodVisitor methodVisitor = declareMethod(visitor, property.getName(),
            Type.getMethodDescriptor(Type.VOID_TYPE, CLOSURE_TYPE), null);
    putThisOnStack(methodVisitor);
    putConstantOnStack(methodVisitor, property.getName());
    methodVisitor.visitInsn(Opcodes.ICONST_1);
    methodVisitor.visitTypeInsn(Opcodes.ANEWARRAY, OBJECT_TYPE.getInternalName());
    methodVisitor.visitInsn(Opcodes.DUP);
    methodVisitor.visitInsn(Opcodes.ICONST_0);
    putFirstMethodArgumentOnStack(methodVisitor);
    methodVisitor.visitInsn(Opcodes.AASTORE);
    methodVisitor.visitMethodInsn(INVOKEVIRTUAL, generatedType.getInternalName(), "methodMissing",
            METHOD_MISSING_METHOD_DESCRIPTOR, false);
    finishVisitingMethod(methodVisitor);
}

---

From source file:org.hua.ast.visitors.BytecodeGeneratorASTVisitor.java

private void handleNumberOperator(ASTNode node, Operator op, Type type) throws ASTVisitorException {
    if (op.equals(Operator.PLUS)) {

        // FIXME: IADD or DADD, etc.
        //        use type.getOpcode(Opcodes.IADD) to avoid if-then
        mn.instructions.add(new InsnNode(type.getOpcode(Opcodes.IADD)));

    } else if (op.equals(Operator.MINUS)) {

        // FIXME: ISUB or DSUB, etc.
        //        use type.getOpcode() to avoid if-then
        mn.instructions.add(new InsnNode(type.getOpcode(Opcodes.ISUB)));

    } else if (op.equals(Operator.MULTIPLY)) {

        // FIXME: IMUL or DMUL, etc.
        //        use type.getOpcode() to avoid if-then
        mn.instructions.add(new InsnNode(type.getOpcode(Opcodes.IMUL)));

    } else if (op.equals(Operator.DIVISION)) {

        // FIXME: IDIV or DDIV, etc.
        //        use type.getOpcode() to avoid if-then
        mn.instructions.add(new InsnNode(type.getOpcode(Opcodes.IDIV)));

    } else if (op.isRelational()) {
        if (type.equals(Type.DOUBLE_TYPE)) {
            mn.instructions.add(new InsnNode(Opcodes.DCMPG));
            JumpInsnNode jmp = null;/*from  ww w . j a v  a  2s.c o m*/
            switch (op) {
            case EQUAL:
                jmp = new JumpInsnNode(Opcodes.IFEQ, null);
                mn.instructions.add(jmp);
                break;
            case NOT_EQUAL:
                jmp = new JumpInsnNode(Opcodes.IFNE, null);
                mn.instructions.add(jmp);
                break;
            case GREATER:
                jmp = new JumpInsnNode(Opcodes.IFGT, null);
                mn.instructions.add(jmp);
                break;
            case GREATER_EQUAL:
                jmp = new JumpInsnNode(Opcodes.IFGE, null);
                mn.instructions.add(jmp);
                break;
            case LESS:
                jmp = new JumpInsnNode(Opcodes.IFLT, null);
                mn.instructions.add(jmp);
                break;
            case LESS_EQUAL:
                jmp = new JumpInsnNode(Opcodes.IFLE, null);
                mn.instructions.add(jmp);
                break;
            default:
                ASTUtils.error(node, "Operator not supported");
                break;
            }
            mn.instructions.add(new InsnNode(Opcodes.ICONST_0));
            LabelNode endLabelNode = new LabelNode();
            mn.instructions.add(new JumpInsnNode(Opcodes.GOTO, endLabelNode));
            LabelNode trueLabelNode = new LabelNode();
            jmp.label = trueLabelNode;
            mn.instructions.add(trueLabelNode);
            mn.instructions.add(new InsnNode(Opcodes.ICONST_1));
            mn.instructions.add(endLabelNode);
        } else if (type.equals(Type.INT_TYPE)) {
            LabelNode trueLabelNode = new LabelNode();
            switch (op) {
            case EQUAL:
                mn.instructions.add(new JumpInsnNode(Opcodes.IF_ICMPEQ, trueLabelNode));
                break;
            case NOT_EQUAL:
                mn.instructions.add(new JumpInsnNode(Opcodes.IF_ICMPNE, trueLabelNode));
                break;
            case GREATER:
                mn.instructions.add(new JumpInsnNode(Opcodes.IF_ICMPGT, trueLabelNode));
                break;
            case GREATER_EQUAL:
                mn.instructions.add(new JumpInsnNode(Opcodes.IF_ICMPGE, trueLabelNode));
                break;
            case LESS:
                mn.instructions.add(new JumpInsnNode(Opcodes.IF_ICMPLT, trueLabelNode));
                break;
            case LESS_EQUAL:
                mn.instructions.add(new JumpInsnNode(Opcodes.IF_ICMPLE, trueLabelNode));
                break;
            default:
                break;
            }
            mn.instructions.add(new InsnNode(Opcodes.ICONST_0));
            LabelNode endLabelNode = new LabelNode();
            mn.instructions.add(new JumpInsnNode(Opcodes.GOTO, endLabelNode));
            mn.instructions.add(trueLabelNode);
            mn.instructions.add(new InsnNode(Opcodes.ICONST_1));
            mn.instructions.add(endLabelNode);
        } else {
            ASTUtils.error(node, "Cannot compare such types.");
        }
    } else {
        ASTUtils.error(node, "Operator not recognized.");
    }
}

---

From source file:org.hua.ast.visitors.BytecodeGeneratorASTVisitor.java

/**
 * Assumes top of stack contains two strings
 *//* w w  w  .  ja v  a 2  s  .com*/
private void handleStringOperator(ASTNode node, Operator op) throws ASTVisitorException {
    if (op.equals(Operator.PLUS)) {
        mn.instructions.add(new TypeInsnNode(Opcodes.NEW, "java/lang/StringBuilder"));
        mn.instructions.add(new InsnNode(Opcodes.DUP));
        mn.instructions.add(
                new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "()V", false));
        mn.instructions.add(new InsnNode(Opcodes.SWAP));
        mn.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false));
        mn.instructions.add(new InsnNode(Opcodes.SWAP));
        mn.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false));
        mn.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "toString",
                "()Ljava/lang/String;", false));
    } else if (op.isRelational()) {
        LabelNode trueLabelNode = new LabelNode();
        switch (op) {
        case EQUAL:
            mn.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals",
                    "(Ljava/lang/Object;)Z", false));
            mn.instructions.add(new JumpInsnNode(Opcodes.IFNE, trueLabelNode));
            break;
        case NOT_EQUAL:
            mn.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals",
                    "(Ljava/lang/Object;)Z", false));
            mn.instructions.add(new JumpInsnNode(Opcodes.IFEQ, trueLabelNode));
            break;
        default:
            ASTUtils.error(node, "Operator not supported on strings");
            break;
        }
        mn.instructions.add(new InsnNode(Opcodes.ICONST_0));
        LabelNode endLabelNode = new LabelNode();
        mn.instructions.add(new JumpInsnNode(Opcodes.GOTO, endLabelNode));
        mn.instructions.add(trueLabelNode);
        mn.instructions.add(new InsnNode(Opcodes.ICONST_1));
        mn.instructions.add(endLabelNode);
    } else {
        ASTUtils.error(node, "Operator not recognized");
    }
}

---

From source file:org.jacoco.core.instr.ResizeInstructionsTest.java

License:Open Source License

/**
 * Adds code that triggers usage of//from   ww  w .j a  v  a  2 s  .  co  m
 * {@link org.objectweb.asm.MethodWriter#COMPUTE_INSERTED_FRAMES} during
 * instrumentation.
 */
private static void addCauseOfResizeInstructions(final MethodVisitor mv) {
    mv.visitInsn(Opcodes.ICONST_0);
    mv.visitInsn(Opcodes.ICONST_1);
    final Label target = new Label();
    mv.visitJumpInsn(Opcodes.IFLE, target);
    for (int i = 0; i < Short.MAX_VALUE; i++) {
        mv.visitInsn(Opcodes.NOP);
    }
    mv.visitLabel(target);
}

---

From source file:org.jacoco.core.internal.analysis.AC_MethodAnalyzerTest.java

License:Open Source License

private void createLoop() {
    final Label l0 = new Label();
    method.visitLabel(l0);/* w w  w .jav a  2 s .  c  o  m*/
    method.visitLineNumber(1001, l0);
    method.visitInsn(Opcodes.ICONST_0);
    method.visitVarInsn(Opcodes.ISTORE, 1);
    final Label l1 = new Label();
    method.visitLabel(l1);
    method.visitLineNumber(1002, l1);
    method.visitVarInsn(Opcodes.ILOAD, 1);
    method.visitInsn(Opcodes.ICONST_5);
    final Label l2 = new Label();
    method.visitJumpInsn(Opcodes.IF_ICMPGE, l2);
    method.visitIincInsn(1, 1);
    method.visitJumpInsn(Opcodes.GOTO, l1);
    method.visitLabel(l2);
    method.visitLineNumber(1003, l2);
    method.visitInsn(Opcodes.RETURN);
}

---

From source file:org.jacoco.core.internal.analysis.filter.AnnotationGeneratedFilterTest.java

License:Open Source License

@Test
public void should_filter_methods_annotated_with_runtime_visible_org_groovy_transform_Generated() {
    final MethodNode m = new MethodNode(InstrSupport.ASM_API_VERSION, 0, "hashCode", "()I", null, null);
    m.visitAnnotation("Lgroovy/transform/Generated;", true);

    m.visitInsn(Opcodes.ICONST_0);
    m.visitInsn(Opcodes.IRETURN);//from  www. j av a  2 s .co  m

    filter.filter(m, context, output);

    assertMethodIgnored(m);
}

---

From source file:org.jacoco.core.internal.analysis.filter.AnnotationGeneratedFilterTest.java

License:Open Source License

@Test
public void should_filter_methods_annotated_with_runtime_invisible_lombok_Generated() {
    final MethodNode m = new MethodNode(InstrSupport.ASM_API_VERSION, 0, "hashCode", "()I", null, null);
    m.visitAnnotation("Llombok/Generated;", false);

    m.visitInsn(Opcodes.ICONST_0);
    m.visitInsn(Opcodes.IRETURN);// w w w.j  a  v a2  s  . c om

    filter.filter(m, context, output);

    assertMethodIgnored(m);
}

---

From source file:org.jacoco.core.internal.analysis.filter.AnnotationGeneratedFilterTest.java

License:Open Source License

@Test
public void should_filter_classes_annotated_with_runtime_visible_org_immutables_value_Generated() {
    final MethodNode m = new MethodNode(InstrSupport.ASM_API_VERSION, 0, "hashCode", "()I", null, null);

    m.visitInsn(Opcodes.ICONST_0);
    m.visitInsn(Opcodes.IRETURN);//  ww w. j  av a 2 s. c om

    context.classAnnotations.add("Lorg/immutables/value/Generated;");

    filter.filter(m, context, output);

    assertMethodIgnored(m);
}

---

From source file:org.jacoco.core.internal.analysis.filter.AnnotationGeneratedFilterTest.java

License:Open Source License

@Test
public void should_filter_when_annotation_is_inner() {
    final MethodNode m = new MethodNode(InstrSupport.ASM_API_VERSION, 0, "hashCode", "()I", null, null);

    m.visitInsn(Opcodes.ICONST_0);
    m.visitInsn(Opcodes.IRETURN);/* w ww. j a v  a 2 s  .c  om*/

    context.classAnnotations.add("Lorg/example/Class$Generated;");

    filter.filter(m, context, output);

    assertMethodIgnored(m);
}

---

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