Package com.facebook.presto.byteCode.instruction

Examples of com.facebook.presto.byteCode.instruction.LabelNode

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        if (checkForNulls) {
            caseBlock.putVariable(caseWasNull.getLocalVariableDefinition(), false);
        }

        LabelNode elseLabel = new LabelNode("else");
        Block elseBlock = new Block(context)
                .visitLabel(elseLabel);

        if (checkForNulls) {
            elseBlock.getVariable(caseWasNull.getLocalVariableDefinition())
                    .putVariable("wasNull");
        }

        elseBlock.gotoLabel(noMatchLabel);

        ByteCodeNode elseNode = elseBlock;
        for (TypedByteCodeNode testNode : testValues) {
            LabelNode testLabel = new LabelNode("test");
            IfStatementBuilder test = ifStatementBuilder(context);

            Block condition = new Block(context)
                    .visitLabel(testLabel)
                    .dup(type)
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                .putVariable(completedPositionsVariable, 0);

        //
        // for loop loop body
        //
        LabelNode done = new LabelNode("done");
        ForLoopBuilder forLoop = ForLoop.forLoopBuilder(compilerContext)
                .initialize(NOP)
                .condition(new Block(compilerContext)
                        .comment("completedPositions < 16384")
                        .getVariable(completedPositionsVariable)
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                    .getBody()
                    .push(false)
                    .retBoolean();
        }
        else {
            LabelNode end = new LabelNode("end");
            filterMethod
                    .getBody()
                    .comment("boolean wasNull = false;")
                    .putVariable("wasNull", false)
                    .append(body.getNode())
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                .getField(positionField)
                .push(1)
                .intAdd()
                .putField(positionField);

        LabelNode lessThan = new LabelNode("lessThan");
        LabelNode end = new LabelNode("end");
        advanceNextPositionBody
                .comment("return position < positionCount;")
                .pushThis()
                .getField(positionField)
                .pushThis()
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                "currentRowContainsNull",
                type(boolean.class))
                .getBody();

        for (FieldDefinition probeBlockField : probeBlockFields) {
            LabelNode checkNextField = new LabelNode("checkNextField");
            body
                    .append(context.getVariable("this").getField(probeBlockField).invoke("isNull", boolean.class, context.getVariable("this").getField(positionField)))
                    .ifFalseGoto(checkNextField)
                    .push(true)
                    .retBoolean()
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                .putVariable(completedPositionsVariable, 0);

        //
        // for loop loop body
        //
        LabelNode done = new LabelNode("done");
        ForLoopBuilder forLoop = ForLoop.forLoopBuilder(context)
                .initialize(NOP)
                .condition(new Block(context)
                                .comment("completedPositions < count")
                                .getVariable(completedPositionsVariable)
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        Variable wasNullVariable = context.declareVariable(type(boolean.class), "wasNull");
        Variable cursorVariable = context.getVariable("cursor");

        ByteCodeExpressionVisitor visitor = new ByteCodeExpressionVisitor(callSiteBinder, fieldReferenceCompiler(cursorVariable, wasNullVariable), metadata.getFunctionRegistry());

        LabelNode end = new LabelNode("end");
        method.getBody()
                .comment("boolean wasNull = false;")
                .putVariable(wasNullVariable, false)
                .comment("evaluate filter: " + filter)
                .append(filter.accept(visitor, context))
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        }

        //
        // for loop loop body
        //
        LabelNode done = new LabelNode("done");

        Block loopBody = new Block(context);

        ForLoopBuilder loop = ForLoop.forLoopBuilder(context)
                .initialize(NOP)
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                callSiteBinder,
                fieldReferenceCompiler(callSiteBinder, positionVariable, wasNullVariable),
                metadata.getFunctionRegistry());
        ByteCodeNode body = filter.accept(visitor, context);

        LabelNode end = new LabelNode("end");
        method
                .getBody()
                .comment("boolean wasNull = false;")
                .putVariable(wasNullVariable, false)
                .append(body)
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        MethodType methodType = binding.getType();

        Signature signature = function.getSignature();
        Class<?> unboxedReturnType = Primitives.unwrap(methodType.returnType());

        LabelNode end = new LabelNode("end");
        Block block = new Block(context)
                .setDescription("invoke " + signature);

        List<Class<?>> stackTypes = new ArrayList<>();

        int index = 0;
        for (Class<?> type : methodType.parameterArray()) {
            stackTypes.add(type);
            if (type == ConnectorSession.class) {
                block.getVariable("session");
            }
            else {
                block.append(arguments.get(index));
                if (!function.getNullableArguments().get(index)) {
                    block.append(ifWasNullPopAndGoto(context, end, unboxedReturnType, Lists.reverse(stackTypes)));
                }
                else {
                    block.append(boxPrimitiveIfNecessary(context, type));
                    block.putVariable("wasNull", false);
                }
                index++;
            }
        }
        block.append(invoke(context, binding, function.getSignature()));

        if (function.isNullable()) {
            if (unboxedReturnType.isPrimitive()) {
                LabelNode notNull = new LabelNode("notNull");
                block.dup(methodType.returnType())
                        .ifNotNullGoto(notNull)
                        .putVariable("wasNull", true)
                        .comment("swap boxed null with unboxed default")
                        .pop(methodType.returnType())
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Related Classes of com.facebook.presto.byteCode.instruction.LabelNode

  • com.facebook.presto.byteCode.control.TryCatch
  • com.facebook.presto.byteCode.expression.AndByteCodeExpression
  • com.facebook.presto.byteCode.expression.ComparisonByteCodeExpression
  • com.facebook.presto.byteCode.expression.InlineIfByteCodeExpression
  • com.facebook.presto.byteCode.expression.NotByteCodeExpression
  • com.facebook.presto.byteCode.expression.OrByteCodeExpression
  • com.facebook.presto.sql.gen.AndCodeGenerator
  • com.facebook.presto.sql.gen.ByteCodeExpressionVisitor
  • com.facebook.presto.sql.gen.ByteCodeUtils
  • com.facebook.presto.sql.gen.CursorProcessorCompiler
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