Examples of org.objectweb.asm.MethodVisitor.visitVarInsn()

org.objectweb.asm.MethodVisitor.visitVarInsn()
Visits a local variable instruction. A local variable instruction is an instruction that loads or stores the value of a local variable. @param opcode the opcode of the local variable instruction to be visited.This opcode is either ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET. @param var the operand of the instruction to be visited. This operand isthe index of a local variable.


    private static void genConstructor(ClassWriter cw, final String superClass) {
        MethodVisitor mv;
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, superClass, "<init>", "()V");
        mv.visitInsn(Opcodes.RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }

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        // make call
        if (Modifier.isStatic(method.getModifiers())) {
            genLoadParameters(2, mv, method);
            mv.visitMethodInsn(Opcodes.INVOKESTATIC, type, method.getName(), descriptor);
        } else {
            mv.visitVarInsn(Opcodes.ALOAD, 1);
            BytecodeHelper.doCast(mv, callClass);
            genLoadParameters(2, mv, method);
            mv.visitMethodInsn((useInterface) ? Opcodes.INVOKEINTERFACE : Opcodes.INVOKEVIRTUAL, type, method.getName(), descriptor);
        }

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            // make call
             if (Modifier.isStatic(method.getModifiers())) {
                MethodHandleFactory.genLoadParametersDirect(2, mv,  method);
                mv.visitMethodInsn(Opcodes.INVOKESTATIC, type, method.getName(), descriptor);
            } else {
                mv.visitVarInsn(Opcodes.ALOAD, 1);
                BytecodeHelper.doCast(mv, callClass);
                MethodHandleFactory.genLoadParametersDirect(2, mv, method);
                mv.visitMethodInsn((useInterface) ? Opcodes.INVOKEINTERFACE : Opcodes.INVOKEVIRTUAL, type, method.getName(), descriptor);
            }

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            // make call
             if (Modifier.isStatic(method.getModifiers())) {
                MethodHandleFactory.genLoadParametersPrimitiveDirect(2, mv, method);
                mv.visitMethodInsn(Opcodes.INVOKESTATIC, type, method.getName(), descriptor);
            } else {
                mv.visitVarInsn(Opcodes.ALOAD, 1);
                BytecodeHelper.doCast(mv, callClass);
                MethodHandleFactory.genLoadParametersPrimitiveDirect(2, mv, method);
                mv.visitMethodInsn((useInterface) ? Opcodes.INVOKEINTERFACE : Opcodes.INVOKEVIRTUAL, type, method.getName(), descriptor);
            }

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        Label continueLabel = compileStack.getContinueLabel();
        Label breakLabel = compileStack.getBreakLabel();


        mv.visitLabel(continueLabel);
        mv.visitVarInsn(ALOAD, iteratorIdx);
        writeIteratorHasNext(mv);
        // note: ifeq tests for ==0, a boolean is 0 if it is false
        mv.visitJumpInsn(IFEQ, breakLabel);


        mv.visitVarInsn(ALOAD, iteratorIdx);

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        mv.visitVarInsn(ALOAD, iteratorIdx);
        writeIteratorHasNext(mv);
        // note: ifeq tests for ==0, a boolean is 0 if it is false
        mv.visitJumpInsn(IFEQ, breakLabel);


        mv.visitVarInsn(ALOAD, iteratorIdx);
        writeIteratorNext(mv);
        operandStack.push(ClassHelper.OBJECT_TYPE);
        operandStack.storeVar(variable);


        // Generate the loop body

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        int anyExceptionIndex = compileStack.defineTemporaryVariable("exception", true);


        finallyStatement.visit(controller.getAcg());


        // load the exception and rethrow it
        mv.visitVarInsn(ALOAD, anyExceptionIndex);
        mv.visitInsn(ATHROW);


        mv.visitLabel(skipCatchAll);
    }

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    {
        controller.getAcg().onLineNumber(statement, "visitCaseStatement");
        MethodVisitor mv = controller.getMethodVisitor();
        OperandStack operandStack = controller.getOperandStack();


        mv.visitVarInsn(ALOAD, switchVariableIndex);
        
        statement.getExpression().visit(controller.getAcg());
        operandStack.box();
        controller.getBinaryExpHelper().getIsCaseMethod().call(mv);
        operandStack.replace(ClassHelper.boolean_TYPE);

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        final Label synchronizedStart = new Label();
        final Label synchronizedEnd = new Label();
        final Label catchAll = new Label();


        mv.visitVarInsn(ALOAD, index);
        mv.visitInsn(MONITORENTER);
        mv.visitLabel(synchronizedStart);
        // place holder for "empty" synchronized blocks, for example
        // if there is only a break/continue.
        mv.visitInsn(NOP);

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        // if there is only a break/continue.
        mv.visitInsn(NOP);


        Runnable finallyPart = new Runnable() {
            public void run() {
                mv.visitVarInsn(ALOAD, index);
                mv.visitInsn(MONITOREXIT);
            }
        };
        BlockRecorder fb = new BlockRecorder(finallyPart);
        fb.startRange(synchronizedStart);

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