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

org.objectweb.asm.MethodVisitor.visitLabel()
Visits a label. A label designates the instruction that will be visited just after it. @param label a {@link Label Label} object.


        controller.getCompileStack().pushBooleanExpression();
        ifElse.getElseBlock().visit(controller.getAcg());
        controller.getCompileStack().pop();


        mv.visitLabel(l1);
    }


    public void writeTryCatchFinally(TryCatchStatement statement) {
        controller.getAcg().onLineNumber(statement, "visitTryCatchFinally");
        writeStatementLabel(statement);

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        Statement tryStatement = statement.getTryStatement();
        final Statement finallyStatement = statement.getFinallyStatement();


        // start try block, label needed for exception table
        Label tryStart = new Label();
        mv.visitLabel(tryStart);
        BlockRecorder tryBlock = makeBlockRecorder(finallyStatement);
        tryBlock.startRange(tryStart);


        tryStatement.visit(controller.getAcg());

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        // goto finally part
        Label finallyStart = new Label();
        mv.visitJumpInsn(GOTO, finallyStart);


        Label tryEnd = new Label();
        mv.visitLabel(tryEnd);
        tryBlock.closeRange(tryEnd);
        // pop for "makeBlockRecorder(finallyStatement)"
        controller.getCompileStack().pop();


        BlockRecorder catches = makeBlockRecorder(finallyStatement);

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            ClassNode exceptionType = catchStatement.getExceptionType();
            String exceptionTypeInternalName = BytecodeHelper.getClassInternalName(exceptionType);


            // start catch block, label needed for exception table
            Label catchStart = new Label();
            mv.visitLabel(catchStart);
            catches.startRange(catchStart);


            // create exception variable and store the exception
            Parameter exceptionVariable = catchStatement.getVariable();
            compileStack.pushState();

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            // pop for the variable
            controller.getCompileStack().pop();


            // end of catch
            Label catchEnd = new Label();
            mv.visitLabel(catchEnd);
            catches.closeRange(catchEnd);


            // goto finally start
            mv.visitJumpInsn(GOTO, finallyStart);
            compileStack.writeExceptionTable(tryBlock, catchStart, exceptionTypeInternalName);

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        // pop for "makeBlockRecorder(catches)"
        compileStack.pop();


        // start finally
        mv.visitLabel(finallyStart);
        finallyStatement.visit(controller.getAcg());
        mv.visitInsn(NOP);  //**


        // goto after all-catching block
        Label skipCatchAll = new Label();

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        // goto after all-catching block
        Label skipCatchAll = new Label();
        mv.visitJumpInsn(GOTO, skipCatchAll);


        // start a block catching any Exception
        mv.visitLabel(catchAny);
        //store exception
        //TODO: maybe define a Throwable and use it here instead of Object
        operandStack.push(ClassHelper.OBJECT_TYPE);
        int anyExceptionIndex = compileStack.defineTemporaryVariable("exception", true);

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


        mv.visitLabel(skipCatchAll);
    }
    
    private BlockRecorder makeBlockRecorder(final Statement finallyStatement) {
        final BlockRecorder block = new BlockRecorder();
        Runnable tryRunner = new Runnable() {

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        controller.getBinaryExpHelper().getIsCaseMethod().call(mv);
        operandStack.replace(ClassHelper.boolean_TYPE);


        Label l0 = controller.getOperandStack().jump(IFEQ);


        mv.visitLabel(thisLabel);


        statement.getCode().visit(controller.getAcg());


        // now if we don't finish with a break we need to jump past
        // the next comparison

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        // the next comparison
        if (nextLabel != null) {
            mv.visitJumpInsn(GOTO, nextLabel);
        }


        mv.visitLabel(l0);
    }


    public void writeBreak(BreakStatement statement) {
        controller.getAcg().onLineNumber(statement, "visitBreakStatement");
        writeStatementLabel(statement);

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