Examples with BytecodeExpression org.codehaus.groovy.classgen.BytecodeExpression used on opensource projects

Example 6 with BytecodeExpression

use of org.codehaus.groovy.classgen.BytecodeExpression in project groovy by apache.

the class BinaryExpressionHelper method evaluateEqual.

public void evaluateEqual(BinaryExpression expression, boolean defineVariable) {
    AsmClassGenerator acg = controller.getAcg();
    CompileStack compileStack = controller.getCompileStack();
    OperandStack operandStack = controller.getOperandStack();
    Expression rightExpression = expression.getRightExpression();
    Expression leftExpression = expression.getLeftExpression();
    ClassNode lhsType = controller.getTypeChooser().resolveType(leftExpression, controller.getClassNode());
    if (defineVariable && rightExpression instanceof EmptyExpression && !(leftExpression instanceof TupleExpression)) {
        VariableExpression ve = (VariableExpression) leftExpression;
        BytecodeVariable var = compileStack.defineVariable(ve, controller.getTypeChooser().resolveType(ve, controller.getClassNode()), false);
        operandStack.loadOrStoreVariable(var, false);
        return;
    }
    // let's evaluate the RHS and store the result
    ClassNode rhsType;
    if (rightExpression instanceof ListExpression && lhsType.isArray()) {
        ListExpression list = (ListExpression) rightExpression;
        ArrayExpression array = new ArrayExpression(lhsType.getComponentType(), list.getExpressions());
        array.setSourcePosition(list);
        array.visit(acg);
    } else if (rightExpression instanceof EmptyExpression) {
        rhsType = leftExpression.getType();
        loadInitValue(rhsType);
    } else {
        rightExpression.visit(acg);
    }
    rhsType = operandStack.getTopOperand();
    boolean directAssignment = defineVariable && !(leftExpression instanceof TupleExpression);
    int rhsValueId;
    if (directAssignment) {
        VariableExpression var = (VariableExpression) leftExpression;
        if (var.isClosureSharedVariable() && ClassHelper.isPrimitiveType(rhsType)) {
            // GROOVY-5570: if a closure shared variable is a primitive type, it must be boxed
            rhsType = ClassHelper.getWrapper(rhsType);
            operandStack.box();
        }
        // form as it is closure shared
        if (var.isClosureSharedVariable() && ClassHelper.isPrimitiveType(var.getOriginType()) && isNull(rightExpression)) {
            operandStack.doGroovyCast(var.getOriginType());
            // these two are never reached in bytecode and only there 
            // to avoid verifyerrors and compiler infrastructure hazzle
            operandStack.box();
            operandStack.doGroovyCast(lhsType);
        }
        // normal type transformation 
        if (!ClassHelper.isPrimitiveType(lhsType) && isNull(rightExpression)) {
            operandStack.replace(lhsType);
        } else {
            operandStack.doGroovyCast(lhsType);
        }
        rhsType = lhsType;
        rhsValueId = compileStack.defineVariable(var, lhsType, true).getIndex();
    } else {
        rhsValueId = compileStack.defineTemporaryVariable("$rhs", rhsType, true);
    }
    //TODO: if rhs is VariableSlotLoader already, then skip crating a new one
    BytecodeExpression rhsValueLoader = new VariableSlotLoader(rhsType, rhsValueId, operandStack);
    // assignment for subscript
    if (leftExpression instanceof BinaryExpression) {
        BinaryExpression leftBinExpr = (BinaryExpression) leftExpression;
        if (leftBinExpr.getOperation().getType() == Types.LEFT_SQUARE_BRACKET) {
            assignToArray(expression, leftBinExpr.getLeftExpression(), leftBinExpr.getRightExpression(), rhsValueLoader);
        }
        compileStack.removeVar(rhsValueId);
        return;
    }
    compileStack.pushLHS(true);
    // multiple declaration
    if (leftExpression instanceof TupleExpression) {
        TupleExpression tuple = (TupleExpression) leftExpression;
        int i = 0;
        for (Expression e : tuple.getExpressions()) {
            VariableExpression var = (VariableExpression) e;
            MethodCallExpression call = new MethodCallExpression(rhsValueLoader, "getAt", new ArgumentListExpression(new ConstantExpression(i)));
            call.visit(acg);
            i++;
            if (defineVariable) {
                operandStack.doGroovyCast(var);
                compileStack.defineVariable(var, true);
                operandStack.remove(1);
            } else {
                acg.visitVariableExpression(var);
            }
        }
    } else // single declaration
    if (defineVariable) {
        rhsValueLoader.visit(acg);
        operandStack.remove(1);
        compileStack.popLHS();
        return;
    } else // normal assignment
    {
        int mark = operandStack.getStackLength();
        // to leave a copy of the rightExpression value on the stack after the assignment.
        rhsValueLoader.visit(acg);
        TypeChooser typeChooser = controller.getTypeChooser();
        ClassNode targetType = typeChooser.resolveType(leftExpression, controller.getClassNode());
        operandStack.doGroovyCast(targetType);
        leftExpression.visit(acg);
        operandStack.remove(operandStack.getStackLength() - mark);
    }
    compileStack.popLHS();
    // return value of assignment
    rhsValueLoader.visit(acg);
    compileStack.removeVar(rhsValueId);
}

Example 7 with BytecodeExpression

use of org.codehaus.groovy.classgen.BytecodeExpression in project groovy-core by groovy.

the class BinaryExpressionHelper method execMethodAndStoreForSubscriptOperator.

private void execMethodAndStoreForSubscriptOperator(int op, String method, Expression expression, VariableSlotLoader usesSubscript, Expression orig) {
    final OperandStack operandStack = controller.getOperandStack();
    writePostOrPrefixMethod(op, method, expression, orig);
    // we need special code for arrays to store the result (like for a[1]++)
    if (usesSubscript != null) {
        CompileStack compileStack = controller.getCompileStack();
        BinaryExpression be = (BinaryExpression) expression;
        ClassNode methodResultType = operandStack.getTopOperand();
        final int resultIdx = compileStack.defineTemporaryVariable("postfix_" + method, methodResultType, true);
        BytecodeExpression methodResultLoader = new VariableSlotLoader(methodResultType, resultIdx, operandStack);
        // execute the assignment, this will leave the right side 
        // (here the method call result) on the stack
        assignToArray(be, be.getLeftExpression(), usesSubscript, methodResultLoader);
        compileStack.removeVar(resultIdx);
    } else // here we handle a.b++ and a++
    if (expression instanceof VariableExpression || expression instanceof FieldExpression || expression instanceof PropertyExpression) {
        operandStack.dup();
        controller.getCompileStack().pushLHS(true);
        expression.visit(controller.getAcg());
        controller.getCompileStack().popLHS();
    }
// other cases don't need storing, so nothing to be done for them
}

Example 8 with BytecodeExpression

use of org.codehaus.groovy.classgen.BytecodeExpression in project groovy-core by groovy.

the class BinaryExpressionHelper method evaluateEqual.

public void evaluateEqual(BinaryExpression expression, boolean defineVariable) {
    AsmClassGenerator acg = controller.getAcg();
    CompileStack compileStack = controller.getCompileStack();
    OperandStack operandStack = controller.getOperandStack();
    Expression rightExpression = expression.getRightExpression();
    Expression leftExpression = expression.getLeftExpression();
    ClassNode lhsType = controller.getTypeChooser().resolveType(leftExpression, controller.getClassNode());
    if (defineVariable && rightExpression instanceof EmptyExpression && !(leftExpression instanceof TupleExpression)) {
        VariableExpression ve = (VariableExpression) leftExpression;
        BytecodeVariable var = compileStack.defineVariable(ve, controller.getTypeChooser().resolveType(ve, controller.getClassNode()), false);
        operandStack.loadOrStoreVariable(var, false);
        return;
    }
    // let's evaluate the RHS and store the result
    ClassNode rhsType;
    if (rightExpression instanceof ListExpression && lhsType.isArray()) {
        ListExpression list = (ListExpression) rightExpression;
        ArrayExpression array = new ArrayExpression(lhsType.getComponentType(), list.getExpressions());
        array.setSourcePosition(list);
        array.visit(acg);
    } else if (rightExpression instanceof EmptyExpression) {
        rhsType = leftExpression.getType();
        loadInitValue(rhsType);
    } else {
        rightExpression.visit(acg);
    }
    rhsType = operandStack.getTopOperand();
    boolean directAssignment = defineVariable && !(leftExpression instanceof TupleExpression);
    int rhsValueId;
    if (directAssignment) {
        VariableExpression var = (VariableExpression) leftExpression;
        if (var.isClosureSharedVariable() && ClassHelper.isPrimitiveType(rhsType)) {
            // GROOVY-5570: if a closure shared variable is a primitive type, it must be boxed
            rhsType = ClassHelper.getWrapper(rhsType);
            operandStack.box();
        }
        // form as it is closure shared
        if (var.isClosureSharedVariable() && ClassHelper.isPrimitiveType(var.getOriginType()) && isNull(rightExpression)) {
            operandStack.doGroovyCast(var.getOriginType());
            // these two are never reached in bytecode and only there 
            // to avoid verifyerrors and compiler infrastructure hazzle
            operandStack.box();
            operandStack.doGroovyCast(lhsType);
        }
        // normal type transformation 
        if (!ClassHelper.isPrimitiveType(lhsType) && isNull(rightExpression)) {
            operandStack.replace(lhsType);
        } else {
            operandStack.doGroovyCast(lhsType);
        }
        rhsType = lhsType;
        rhsValueId = compileStack.defineVariable(var, lhsType, true).getIndex();
    } else {
        rhsValueId = compileStack.defineTemporaryVariable("$rhs", rhsType, true);
    }
    //TODO: if rhs is VariableSlotLoader already, then skip crating a new one
    BytecodeExpression rhsValueLoader = new VariableSlotLoader(rhsType, rhsValueId, operandStack);
    // assignment for subscript
    if (leftExpression instanceof BinaryExpression) {
        BinaryExpression leftBinExpr = (BinaryExpression) leftExpression;
        if (leftBinExpr.getOperation().getType() == Types.LEFT_SQUARE_BRACKET) {
            assignToArray(expression, leftBinExpr.getLeftExpression(), leftBinExpr.getRightExpression(), rhsValueLoader);
        }
        compileStack.removeVar(rhsValueId);
        return;
    }
    compileStack.pushLHS(true);
    // multiple declaration
    if (leftExpression instanceof TupleExpression) {
        TupleExpression tuple = (TupleExpression) leftExpression;
        int i = 0;
        for (Expression e : tuple.getExpressions()) {
            VariableExpression var = (VariableExpression) e;
            MethodCallExpression call = new MethodCallExpression(rhsValueLoader, "getAt", new ArgumentListExpression(new ConstantExpression(i)));
            call.visit(acg);
            i++;
            if (defineVariable) {
                operandStack.doGroovyCast(var);
                compileStack.defineVariable(var, true);
                operandStack.remove(1);
            } else {
                acg.visitVariableExpression(var);
            }
        }
    } else // single declaration
    if (defineVariable) {
        rhsValueLoader.visit(acg);
        operandStack.remove(1);
        compileStack.popLHS();
        return;
    } else // normal assignment
    {
        int mark = operandStack.getStackLength();
        // to leave a copy of the rightExpression value on the stack after the assignment.
        rhsValueLoader.visit(acg);
        TypeChooser typeChooser = controller.getTypeChooser();
        ClassNode targetType = typeChooser.resolveType(leftExpression, controller.getClassNode());
        operandStack.doGroovyCast(targetType);
        leftExpression.visit(acg);
        operandStack.remove(operandStack.getStackLength() - mark);
    }
    compileStack.popLHS();
    // return value of assignment
    rhsValueLoader.visit(acg);
    compileStack.removeVar(rhsValueId);
}

Example 9 with BytecodeExpression

use of org.codehaus.groovy.classgen.BytecodeExpression in project groovy-core by groovy.

the class BinaryExpressionHelper method writePostOrPrefixMethod.

protected void writePostOrPrefixMethod(int op, String method, Expression expression, Expression orig) {
    final OperandStack operandStack = controller.getOperandStack();
    // at this point the receiver will be already on the stack.
    // in a[1]++ the method will be "++" aka "next" and the receiver a[1]
    ClassNode BEType = controller.getTypeChooser().resolveType(expression, controller.getClassNode());
    Expression callSiteReceiverSwap = new BytecodeExpression(BEType) {

        @Override
        public void visit(MethodVisitor mv) {
            // CallSite is normally not showing up on the 
            // operandStack, so we place a dummy here with same
            // slot length.
            operandStack.push(ClassHelper.OBJECT_TYPE);
            // change (receiver,callsite) to (callsite,receiver)
            operandStack.swap();
            setType(operandStack.getTopOperand());
            // no need to keep any of those on the operand stack
            // after this expression is processed, the operand stack
            // will contain callSiteReceiverSwap.getType()
            operandStack.remove(2);
        }
    };
    // execute method
    // this will load the callsite and the receiver normally in the wrong
    // order since the receiver is already present, but before the callsite
    // Therefore we use callSiteReceiverSwap to correct the order. 
    // After this call the JVM operand stack will contain the the result of
    // the method call... usually simply Object in operandStack
    controller.getCallSiteWriter().makeCallSite(callSiteReceiverSwap, method, MethodCallExpression.NO_ARGUMENTS, false, false, false, false);
// now rhs is completely done and we need only to store. In a[1]++ this 
// would be a.getAt(1).next() for the rhs, "lhs" code is a.putAt(1, rhs)
}

Example 10 with BytecodeExpression

use of org.codehaus.groovy.classgen.BytecodeExpression in project groovy-core by groovy.

the class StaticTypesUnaryExpressionHelper method writeBitwiseNegate.

@Override
public void writeBitwiseNegate(final BitwiseNegationExpression expression) {
    expression.getExpression().visit(controller.getAcg());
    if (isPrimitiveOnTop()) {
        final ClassNode top = getTopOperand();
        if (top == int_TYPE || top == short_TYPE || top == byte_TYPE || top == char_TYPE || top == long_TYPE) {
            BytecodeExpression bytecodeExpression = new BytecodeExpression() {

                @Override
                public void visit(final MethodVisitor mv) {
                    if (long_TYPE == top) {
                        mv.visitLdcInsn(-1);
                        mv.visitInsn(LXOR);
                    } else {
                        mv.visitInsn(ICONST_M1);
                        mv.visitInsn(IXOR);
                        if (byte_TYPE == top) {
                            mv.visitInsn(I2B);
                        } else if (char_TYPE == top) {
                            mv.visitInsn(I2C);
                        } else if (short_TYPE == top) {
                            mv.visitInsn(I2S);
                        }
                    }
                }
            };
            bytecodeExpression.visit(controller.getAcg());
            controller.getOperandStack().remove(1);
            return;
        }
    }
    super.writeBitwiseNegate(EMPTY_BITWISE_NEGATE);
}