Examples with DUP org.objectweb.asm.Opcodes.DUP used on opensource projects

Example 1 with DUP

use of org.objectweb.asm.Opcodes.DUP in project groovy by apache.

the class StaticTypesCallSiteWriter method writeListDotProperty.

private void writeListDotProperty(final Expression receiver, final String propertyName, final boolean safe) {
    // for lists, replace list.foo with:
    // def result = new ArrayList(list.size())
    // for (item in list) result.add(item.foo)
    // result
    ClassNode componentType = receiver.getNodeMetaData(StaticCompilationMetadataKeys.COMPONENT_TYPE);
    if (componentType == null) {
        componentType = OBJECT_TYPE;
    }
    CompileStack compileStack = controller.getCompileStack();
    MethodVisitor mv = controller.getMethodVisitor();
    Label exit = new Label();
    if (safe) {
        receiver.visit(controller.getAcg());
        Label doGet = new Label();
        mv.visitJumpInsn(IFNONNULL, doGet);
        controller.getOperandStack().remove(1);
        mv.visitInsn(ACONST_NULL);
        mv.visitJumpInsn(GOTO, exit);
        mv.visitLabel(doGet);
    }
    Variable tmpList = varX("tmpList", ClassHelper.make(ArrayList.class));
    int var = compileStack.defineTemporaryVariable(tmpList, false);
    Variable iterator = varX("iterator", Iterator_TYPE);
    int it = compileStack.defineTemporaryVariable(iterator, false);
    Variable nextVar = varX("next", componentType);
    final int next = compileStack.defineTemporaryVariable(nextVar, false);
    mv.visitTypeInsn(NEW, "java/util/ArrayList");
    mv.visitInsn(DUP);
    receiver.visit(controller.getAcg());
    mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "size", "()I", true);
    controller.getOperandStack().remove(1);
    mv.visitMethodInsn(INVOKESPECIAL, "java/util/ArrayList", "<init>", "(I)V", false);
    mv.visitVarInsn(ASTORE, var);
    Label l1 = new Label();
    mv.visitLabel(l1);
    receiver.visit(controller.getAcg());
    mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "iterator", "()Ljava/util/Iterator;", true);
    controller.getOperandStack().remove(1);
    mv.visitVarInsn(ASTORE, it);
    Label l2 = new Label();
    mv.visitLabel(l2);
    mv.visitVarInsn(ALOAD, it);
    mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "hasNext", "()Z", true);
    Label l3 = new Label();
    mv.visitJumpInsn(IFEQ, l3);
    mv.visitVarInsn(ALOAD, it);
    mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "next", "()Ljava/lang/Object;", true);
    mv.visitTypeInsn(CHECKCAST, BytecodeHelper.getClassInternalName(componentType));
    mv.visitVarInsn(ASTORE, next);
    Label l4 = new Label();
    mv.visitLabel(l4);
    mv.visitVarInsn(ALOAD, var);
    PropertyExpression pexp = propX(bytecodeX(componentType, v -> v.visitVarInsn(ALOAD, next)), propertyName);
    pexp.visit(controller.getAcg());
    controller.getOperandStack().box();
    controller.getOperandStack().remove(1);
    mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "add", "(Ljava/lang/Object;)Z", true);
    mv.visitInsn(POP);
    Label l5 = new Label();
    mv.visitLabel(l5);
    mv.visitJumpInsn(GOTO, l2);
    mv.visitLabel(l3);
    mv.visitVarInsn(ALOAD, var);
    if (safe) {
        mv.visitLabel(exit);
    }
    controller.getOperandStack().push(ClassHelper.make(ArrayList.class));
    controller.getCompileStack().removeVar(next);
    controller.getCompileStack().removeVar(it);
    controller.getCompileStack().removeVar(var);
}

Example 2 with DUP

use of org.objectweb.asm.Opcodes.DUP in project groovy by apache.

the class StaticTypesLambdaWriter method newGroovyLambdaWrapperAndLoad.

private void newGroovyLambdaWrapperAndLoad(final ClassNode lambdaClass, final LambdaExpression expression, final boolean accessingInstanceMembers) {
    CompileStack compileStack = controller.getCompileStack();
    OperandStack operandStack = controller.getOperandStack();
    MethodVisitor mv = controller.getMethodVisitor();
    String lambdaClassInternalName = BytecodeHelper.getClassInternalName(lambdaClass);
    mv.visitTypeInsn(NEW, lambdaClassInternalName);
    mv.visitInsn(DUP);
    if (controller.isStaticMethod() || compileStack.isInSpecialConstructorCall() || !accessingInstanceMembers) {
        classX(controller.getThisType()).visit(controller.getAcg());
    } else {
        loadThis();
    }
    operandStack.dup();
    loadSharedVariables(expression);
    Optional<ConstructorNode> generatedConstructor = lambdaClass.getDeclaredConstructors().stream().filter(ctor -> Boolean.TRUE.equals(ctor.getNodeMetaData(IS_GENERATED_CONSTRUCTOR))).findFirst();
    if (!generatedConstructor.isPresent()) {
        throw new GroovyBugError("Failed to find the generated constructor");
    }
    Parameter[] lambdaClassConstructorParameters = generatedConstructor.get().getParameters();
    mv.visitMethodInsn(INVOKESPECIAL, lambdaClassInternalName, "<init>", BytecodeHelper.getMethodDescriptor(VOID_TYPE, lambdaClassConstructorParameters), lambdaClass.isInterface());
    operandStack.replace(CLOSURE_TYPE, lambdaClassConstructorParameters.length);
}