Package com.facebook.presto.byteCode

Examples of com.facebook.presto.byteCode.Block

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                typeFromPathName("Single" + clazz.getSimpleName() + "_" + CLASS_ID.incrementAndGet()),
                type(AbstractAccumulatorState.class),
                type(clazz));

        // Generate constructor
        Block constructor = definition.declareConstructor(new CompilerContext(null), a(PUBLIC))
                .getBody()
                .pushThis()
                .invokeConstructor(AbstractAccumulatorState.class);

        // Generate fields
        List<StateField> fields = enumerateFields(clazz);
        for (StateField field : fields) {
            generateField(definition, constructor, field);
        }

        constructor.ret();

        return defineClass(definition, clazz, classLoader);
    }
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                type(GroupedAccumulator.class));

        List<StateField> fields = enumerateFields(clazz);

        // Create constructor
        Block constructor = definition.declareConstructor(new CompilerContext(null), a(PUBLIC))
                .getBody()
                .pushThis()
                .invokeConstructor(AbstractGroupedAccumulatorState.class);
        // Create ensureCapacity
        Block ensureCapacity = definition.declareMethod(new CompilerContext(null), a(PUBLIC), "ensureCapacity", type(void.class), NamedParameterDefinition.arg("size", long.class)).getBody();

        // Generate fields, constructor, and ensureCapacity
        List<FieldDefinition> fieldDefinitions = new ArrayList<>();
        for (StateField field : fields) {
            fieldDefinitions.add(generateGroupedField(definition, constructor, ensureCapacity, field));
        }

        constructor.ret();
        ensureCapacity.ret();

        // Generate getEstimatedSize
        Block getEstimatedSize = definition.declareMethod(new CompilerContext(null), a(PUBLIC), "getEstimatedSize", type(long.class))
                .getBody()
                .comment("long size = 0;")
                .push(0L);
        for (FieldDefinition field : fieldDefinitions) {
            getEstimatedSize
                    .comment("size += %s.sizeOf();", field.getName())
                    .pushThis()
                    .getField(field)
                    .invokeVirtual(field.getType(), "sizeOf", type(long.class))
                    .longAdd();
        }
        getEstimatedSize.comment("return size;");
        getEstimatedSize.retLong();

        return defineClass(definition, clazz, classLoader);
    }
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        //

        // for (position = 0; position < rows; position++)
        ForLoopBuilder forLoop = forLoopBuilder(compilerContext)
                .comment("for (position = 0; position < rows; position++)")
                .initialize(new Block(compilerContext).putVariable(positionVariable, 0))
                .condition(new Block(compilerContext)
                        .getVariable(positionVariable)
                        .getVariable(rowsVariable)
                        .invokeStatic(Operations.class, "lessThan", boolean.class, int.class, int.class))
                .update(new Block(compilerContext).incrementVariable(positionVariable, (byte) 1));

        Block forLoopBody = new Block(compilerContext);

        // cursor.advanceNextPosition()
        for (LocalVariableDefinition cursorVariable : cursorVariables) {
            forLoopBody
                    .comment("checkState(%s.advanceNextPosition());", cursorVariable.getName())
                    .getVariable(cursorVariable)
                    .invokeInterface(BlockCursor.class, "advanceNextPosition", boolean.class)
                    .invokeStatic(Preconditions.class, "checkState", void.class, boolean.class);
        }

        IfStatementBuilder ifStatement = new IfStatementBuilder(compilerContext)
                .comment("if (filter(cursors...)");
        Block condition = new Block(compilerContext);
        condition.pushThis();
        for (int channel = 0; channel < channels; channel++) {
            condition.getVariable("cursor_" + channel);
        }
        condition.invokeVirtual(classDefinition.getType(), "filter", type(boolean.class), nCopies(channels, type(TupleReadable.class)));
        ifStatement.condition(condition);

        Block trueBlock = new Block(compilerContext);
        if (projections.isEmpty()) {
            trueBlock
                    .comment("pageBuilder.declarePosition()")
                    .getVariable("pageBuilder")
                    .invokeVirtual(PageBuilder.class, "declarePosition", void.class);
        }
        else {
            // pageBuilder.getBlockBuilder(0).append(cursor.getDouble(0);
            for (int projectionIndex = 0; projectionIndex < projections.size(); projectionIndex++) {
                trueBlock.comment("project_%s(cursors..., pageBuilder.getBlockBuilder(%s))", projectionIndex, projectionIndex);
                trueBlock.pushThis();
                for (int channel = 0; channel < channels; channel++) {
                    trueBlock.getVariable("cursor_" + channel);
                }

                // pageBuilder.getBlockBuilder(0)
                trueBlock.getVariable("pageBuilder")
                        .push(projectionIndex)
                        .invokeVirtual(PageBuilder.class, "getBlockBuilder", BlockBuilder.class, int.class);

                // project(cursor_0, cursor_1, blockBuilder)
                trueBlock.invokeVirtual(classDefinition.getType(),
                        "project_" + projectionIndex,
                        type(void.class),
                        ImmutableList.<ParameterizedType>builder().addAll(nCopies(channels, type(TupleReadable.class))).add(type(BlockBuilder.class)).build());
            }
        }
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        // 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)
                        .push(16384)
                        .invokeStatic(Operations.class, "lessThan", boolean.class, int.class, int.class)
                )
                .update(new Block(compilerContext)
                        .comment("completedPositions++")
                        .incrementVariable(completedPositionsVariable, (byte) 1)
                );

        Block forLoopBody = new Block(compilerContext);
        forLoop.body(forLoopBody);

        forLoopBody.comment("if (pageBuilder.isFull()) break;")
                .append(new Block(compilerContext)
                        .getVariable("pageBuilder")
                        .invokeVirtual(PageBuilder.class, "isFull", boolean.class)
                        .ifTrueGoto(done));

        forLoopBody.comment("if (!cursor.advanceNextPosition()) break;")
                .append(new Block(compilerContext)
                        .getVariable("cursor")
                        .invokeInterface(RecordCursor.class, "advanceNextPosition", boolean.class)
                        .ifFalseGoto(done));

        // if (filter(cursor))
        IfStatementBuilder ifStatement = new IfStatementBuilder(compilerContext);
        ifStatement.condition(new Block(compilerContext)
                .pushThis()
                .getVariable("cursor")
                .invokeVirtual(classDefinition.getType(), "filter", type(boolean.class), type(RecordCursor.class)));

        Block trueBlock = new Block(compilerContext);
        ifStatement.ifTrue(trueBlock);
        if (projections.isEmpty()) {
            // pageBuilder.declarePosition();
            trueBlock.getVariable("pageBuilder").invokeVirtual(PageBuilder.class, "declarePosition", void.class);
        }
        else {
            // project_43(cursor_0, cursor_1, pageBuilder.getBlockBuilder(42)));
            for (int projectionIndex = 0; projectionIndex < projections.size(); projectionIndex++) {
                trueBlock.pushThis();
                trueBlock.getVariable("cursor");

                // pageBuilder.getBlockBuilder(0)
                trueBlock.getVariable("pageBuilder")
                        .push(projectionIndex)
                        .invokeVirtual(PageBuilder.class, "getBlockBuilder", BlockBuilder.class, int.class);

                // project(cursor_0, cursor_1, blockBuilder)
                trueBlock.invokeVirtual(classDefinition.getType(),
                        "project_" + projectionIndex,
                        type(void.class),
                        type(RecordCursor.class),
                        type(BlockBuilder.class));
            }
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        }

        filterMethod.comment("Filter: %s", filter.toString());

        filterMethod.getCompilerContext().declareVariable(type(boolean.class), "wasNull");
        Block getSessionByteCode = new Block(filterMethod.getCompilerContext()).pushThis().getField(classDefinition.getType(), "session", type(Session.class));
        TypedByteCodeNode body = new ByteCodeExpressionVisitor(bootstrapFunctionBinder, inputTypes, getSessionByteCode, sourceIsCursor).process(filter, filterMethod.getCompilerContext());

        if (body.getType() == void.class) {
            filterMethod
                    .getBody()
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        projectionMethod.comment("Projection: %s", projection.toString());

        // generate body code
        CompilerContext context = projectionMethod.getCompilerContext();
        context.declareVariable(type(boolean.class), "wasNull");
        Block getSessionByteCode = new Block(context).pushThis().getField(classDefinition.getType(), "session", type(Session.class));
        TypedByteCodeNode body = new ByteCodeExpressionVisitor(bootstrapFunctionBinder, inputTypes, getSessionByteCode, sourceIsCursor).process(projection, context);

        if (body.getType() != void.class) {
            projectionMethod
                    .getBody()
                    .comment("boolean wasNull = false;")
                    .putVariable("wasNull", false)
                    .getVariable("output")
                    .append(body.getNode());

            Block notNullBlock = new Block(context);
            if (body.getType() == boolean.class) {
                notNullBlock
                        .comment("output.append(<booleanStackValue>);")
                        .invokeVirtual(BlockBuilder.class, "append", BlockBuilder.class, boolean.class)
                        .pop();
            }
            else if (body.getType() == long.class) {
                notNullBlock
                        .comment("output.append(<longStackValue>);")
                        .invokeVirtual(BlockBuilder.class, "append", BlockBuilder.class, long.class)
                        .pop();
            }
            else if (body.getType() == double.class) {
                notNullBlock
                        .comment("output.append(<doubleStackValue>);")
                        .invokeVirtual(BlockBuilder.class, "append", BlockBuilder.class, double.class)
                        .pop();
            }
            else if (body.getType() == Slice.class) {
                notNullBlock
                        .comment("output.append(<sliceStackValue>);")
                        .invokeVirtual(BlockBuilder.class, "append", BlockBuilder.class, Slice.class)
                        .pop();
            }
            else {
                throw new UnsupportedOperationException("Type " + body.getType() + " can not be output yet");
            }

            Block nullBlock = new Block(context)
                    .comment("output.appendNull();")
                    .pop(body.getType())
                    .invokeVirtual(BlockBuilder.class, "appendNull", BlockBuilder.class)
                    .pop();

            projectionMethod.getBody()
                    .comment("if the result was null, appendNull; otherwise append the value")
                    .append(new IfStatement(context, new Block(context).getVariable("wasNull"), nullBlock, notNullBlock))
                    .ret();
        }
        else {
            projectionMethod
                    .getBody()
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    {
        RowExpression argument = arguments.get(0);

        CompilerContext context = generatorContext.getContext();
        if (argument.getType().equals(UnknownType.UNKNOWN)) {
            return new Block(context).putVariable("wasNull", true).pushJavaDefault(returnType.getJavaType());
        }

        FunctionBinding binding = generatorContext
                .getBootstrapBinder()
                .bindCastOperator(generatorContext.generateGetSession(), generatorContext.generate(argument), argument.getType(), returnType);
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    public ByteCodeNode visitConstant(ConstantExpression constant, CompilerContext context)
    {
        Object value = constant.getValue();
        Class<?> javaType = constant.getType().getJavaType();

        Block block = new Block(context);
        if (value == null) {
            return block.comment("constant null")
                    .putVariable("wasNull", true)
                    .pushJavaDefault(javaType);
        }

        // use LDC for primitives (boolean, short, int, long, float, double)
        block.comment("constant " + constant.getType().getName());
        if (javaType == boolean.class) {
            return block.append(loadBoolean((Boolean) value));
        }
        if (javaType == byte.class || javaType == short.class || javaType == int.class) {
            return block.append(loadInt(((Number) value).intValue()));
        }
        if (javaType == long.class) {
            return block.append(loadLong((Long) value));
        }
        if (javaType == float.class) {
            return block.append(loadFloat((Float) value));
        }
        if (javaType == double.class) {
            return block.append(loadDouble((Double) value));
        }
        if (javaType == String.class) {
            return block.append(loadString((String) value));
        }

        // bind constant object directly into the call-site using invoke dynamic
        FunctionBinding binding = bootstrapFunctionBinder.bindConstant(value, constant.getType().getJavaType());

        return new Block(context)
                .setDescription("constant " + constant.getType())
                .comment(constant.toString())
                .invokeDynamic(
                        binding.getName(),
                        binding.getCallSite().type(),
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        Type type = node.getType();

        Class<?> javaType = type.getJavaType();

        if (sourceIsCursor) {
            Block isNullCheck = new Block(context)
                    .setDescription(format("cursor.get%s(%d)", type, field))
                    .getVariable("cursor")
                    .push(field)
                    .invokeInterface(RecordCursor.class, "isNull", boolean.class, int.class);

            Block isNull = new Block(context)
                    .putVariable("wasNull", true)
                    .pushJavaDefault(javaType);

            Block isNotNull = new Block(context)
                    .getVariable("cursor")
                    .push(field);

            if (javaType == boolean.class) {
                isNotNull.invokeInterface(RecordCursor.class, "getBoolean", boolean.class, int.class);
            }
            else if (javaType == long.class) {
                isNotNull.invokeInterface(RecordCursor.class, "getLong", long.class, int.class);
            }
            else if (javaType == double.class) {
                isNotNull.invokeInterface(RecordCursor.class, "getDouble", double.class, int.class);
            }
            else if (javaType == Slice.class) {
                isNotNull.invokeInterface(RecordCursor.class, "getSlice", Slice.class, int.class);
            }
            else {
                throw new UnsupportedOperationException("not yet implemented: " + type);
            }

            return new IfStatement(context, isNullCheck, isNull, isNotNull);
        }
        else {
            Block isNullCheck = new Block(context)
                    .setDescription(format("block_%d.get%s()", field, type))
                    .getVariable("block_" + field)
                    .getVariable("position")
                    .invokeInterface(com.facebook.presto.spi.block.Block.class, "isNull", boolean.class, int.class);

            Block isNull = new Block(context)
                    .putVariable("wasNull", true)
                    .pushJavaDefault(javaType);
            if (javaType == boolean.class) {
                Block isNotNull = new Block(context)
                        .getVariable("block_" + field)
                        .getVariable("position")
                        .invokeInterface(com.facebook.presto.spi.block.Block.class, "getBoolean", boolean.class, int.class);
                return new IfStatement(context, isNullCheck, isNull, isNotNull);
            }
            else if (javaType == long.class) {
                Block isNotNull = new Block(context)
                        .getVariable("block_" + field)
                        .getVariable("position")
                        .invokeInterface(com.facebook.presto.spi.block.Block.class, "getLong", long.class, int.class);
                return new IfStatement(context, isNullCheck, isNull, isNotNull);
            }
            else if (javaType == double.class) {
                Block isNotNull = new Block(context)
                        .getVariable("block_" + field)
                        .getVariable("position")
                        .invokeInterface(com.facebook.presto.spi.block.Block.class, "getDouble", double.class, int.class);
                return new IfStatement(context, isNullCheck, isNull, isNotNull);
            }
            else if (javaType == Slice.class) {
                Block isNotNull = new Block(context)
                        .getVariable("block_" + field)
                        .getVariable("position")
                        .invokeInterface(com.facebook.presto.spi.block.Block.class, "getSlice", Slice.class, int.class);
                return new IfStatement(context, isNullCheck, isNull, isNotNull);
            }
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    public ByteCodeNode generateExpression(Signature signature, ByteCodeGeneratorContext generatorContext, Type returnType, List<RowExpression> arguments)
    {
        ByteCodeNode castByteCode = new CastCodeGenerator().generateExpression(signature, generatorContext, returnType, arguments);

        CompilerContext context = generatorContext.getContext();
        Block catchBlock = new Block(context)
                .comment("propagate InterruptedException")
                .invokeStatic(CompilerOperations.class, "propagateInterruptedException", void.class, Throwable.class)
                .comment("wasNull = true;")
                .putVariable("wasNull", true)
                .comment("restore stack after exception")
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Related Classes of com.facebook.presto.byteCode.Block

  • com.facebook.presto.byteCode.control.DoWhileLoop
  • com.facebook.presto.byteCode.control.ForLoop
  • com.facebook.presto.byteCode.control.IfStatement
  • com.facebook.presto.byteCode.control.TryCatch
  • com.facebook.presto.byteCode.control.WhileLoop
  • com.facebook.presto.byteCode.debug.LineNumberNode
  • com.facebook.presto.byteCode.expression.AndByteCodeExpression
  • com.facebook.presto.byteCode.expression.ArithmeticByteCodeExpression
  • com.facebook.presto.byteCode.expression.CastByteCodeExpression
  • com.facebook.presto.byteCode.expression.ComparisonByteCodeExpression
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