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.

        final int iteratorIdx = compileStack.defineTemporaryVariable("iterator", ClassHelper.Iterator_TYPE, true);


        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);

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        // Generate the loop body
        loop.getLoopBlock().visit(controller.getAcg());


        mv.visitJumpInsn(GOTO, continueLabel);
        mv.visitLabel(breakLabel);


        compileStack.pop();
    }


    protected void writeForLoopWithClosureList(ForStatement loop) {

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        Label continueLabel = controller.getCompileStack().getContinueLabel();
        Label breakLabel = controller.getCompileStack().getBreakLabel();


        Label cond = new Label();
        mv.visitLabel(cond);
        // visit condition leave boolean on stack
        {
            Expression condExpr = (Expression) expressions.get(condIndex);
            int mark = controller.getOperandStack().getStackLength();
            condExpr.visit(controller.getAcg());

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        // Generate the loop body
        loop.getLoopBlock().visit(controller.getAcg());


        // visit increment
        mv.visitLabel(continueLabel);
        for (int i = condIndex + 1; i < size; i++) {
            visitExpressionOrStatement(expressions.get(i));
        }


        // jump to test the condition again

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        // jump to test the condition again
        mv.visitJumpInsn(GOTO, cond);


        // loop end
        mv.visitLabel(breakLabel);


        controller.getCompileStack().pop();
        controller.getCompileStack().pop();
    }

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        controller.getCompileStack().pushLoop(loop.getStatementLabel());
        Label continueLabel = controller.getCompileStack().getContinueLabel();
        Label breakLabel = controller.getCompileStack().getBreakLabel();


        mv.visitLabel(continueLabel);
        Expression bool = loop.getBooleanExpression();
        boolean boolHandled = false;
        if (bool instanceof ConstantExpression) {
            ConstantExpression constant = (ConstantExpression) bool;
            if (constant.getValue()==Boolean.TRUE) {

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        }


        loop.getLoopBlock().visit(controller.getAcg());


        mv.visitJumpInsn(GOTO, continueLabel);
        mv.visitLabel(breakLabel);


        controller.getCompileStack().pop();            
    }


    public void writeDoWhileLoop(DoWhileStatement loop) {

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        MethodVisitor mv = controller.getMethodVisitor();


        controller.getCompileStack().pushLoop(loop.getStatementLabel());
        Label breakLabel = controller.getCompileStack().getBreakLabel();
        Label continueLabel = controller.getCompileStack().getContinueLabel();
        mv.visitLabel(continueLabel);


        loop.getLoopBlock().visit(controller.getAcg());


        loop.getBooleanExpression().visit(controller.getAcg());
        controller.getOperandStack().jump(IFEQ, continueLabel);

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        loop.getLoopBlock().visit(controller.getAcg());


        loop.getBooleanExpression().visit(controller.getAcg());
        controller.getOperandStack().jump(IFEQ, continueLabel);
        mv.visitLabel(breakLabel);


        controller.getCompileStack().pop();
    }


    public void writeIfElse(IfStatement ifElse) {

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        ifElse.getIfBlock().visit(controller.getAcg());
        controller.getCompileStack().pop();


        Label l1 = new Label();
        mv.visitJumpInsn(GOTO, l1);
        mv.visitLabel(l0);


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

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