C++ TIntermBinary::promote方法代码示例

//
// Connect two nodes with a new parent that does a binary operation on the nodes.
//
// Returns the added node.
//
TIntermTyped *TIntermediate::addBinaryMath(
    TOperator op, TIntermTyped *left, TIntermTyped *right, const TSourceLoc &line)
{
    //
    // Need a new node holding things together then.  Make
    // one and promote it to the right type.
    //
    TIntermBinary *node = new TIntermBinary(op);
    node->setLine(line);

    node->setLeft(left);
    node->setRight(right);
    if (!node->promote(mInfoSink))
        return NULL;

    //
    // See if we can fold constants.
    //
    TIntermConstantUnion *leftTempConstant = left->getAsConstantUnion();
    TIntermConstantUnion *rightTempConstant = right->getAsConstantUnion();
    if (leftTempConstant && rightTempConstant)
    {
        TIntermTyped *typedReturnNode =
            leftTempConstant->fold(node->getOp(), rightTempConstant, mInfoSink);

        if (typedReturnNode)
            return typedReturnNode;
    }

    return node;
}

//
// Connect two nodes through an assignment.
//
// Returns the added node.
//
TIntermTyped* TIntermediate::addAssign(TOperator op, TIntermTyped* left, TIntermTyped* right, const TSourceLoc& line)
{
    //
    // Like adding binary math, except the conversion can only go
    // from right to left.
    //
    TIntermBinary* node = new TIntermBinary(op);
    node->setLine(line);

    TIntermTyped* child = addConversion(op, left->getType(), right);
    if (child == 0)
        return 0;

    node->setLeft(left);
    node->setRight(child);
    if (! node->promote(infoSink))
        return 0;

    return node;
}

//
// Connect two nodes through an assignment.
//
// Returns the added node.
//
TIntermTyped *TIntermediate::addAssign(
    TOperator op, TIntermTyped *left, TIntermTyped *right, const TSourceLoc &line)
{
    if (left->getType().getStruct() || right->getType().getStruct())
    {
        if (left->getType() != right->getType())
        {
            return NULL;
        }
    }

    TIntermBinary *node = new TIntermBinary(op);
    node->setLine(line);

    node->setLeft(left);
    node->setRight(right);
    if (!node->promote(mInfoSink))
        return NULL;

    return node;
}

// Connect two nodes through an assignment.
TIntermTyped* ir_add_assign(TOperator op, TIntermTyped* left, TIntermTyped* right, TSourceLoc line, TParseContext& ctx)
{
   //
   // Like adding binary math, except the conversion can only go
   // from right to left.
   //
   TIntermBinary* node = new TIntermBinary(op);
   if (line.line == 0)
      line = left->getLine();
   node->setLine(line);

   TIntermTyped* child = ir_add_conversion(op, left->getType(), right, ctx.infoSink);
   if (child == 0)
      return 0;

   node->setLeft(left);
   node->setRight(child);
   if (! node->promote(ctx))
      return 0;

   return node;
}

//
// Connect two nodes with a new parent that does a binary operation on the nodes.
//
// Returns the added node.
//
TIntermTyped *TIntermediate::addBinaryMath(
    TOperator op, TIntermTyped *left, TIntermTyped *right, const TSourceLoc &line)
{
    //
    // Need a new node holding things together then.  Make
    // one and promote it to the right type.
    //
    TIntermBinary *node = new TIntermBinary(op);
    node->setLine(line);

    node->setLeft(left);
    node->setRight(right);
    if (!node->promote(mInfoSink))
        return NULL;

    // See if we can fold constants.
    TIntermTyped *foldedNode = node->fold(mInfoSink);
    if (foldedNode)
        return foldedNode;

    return node;
}

//
// Connect two nodes with a new parent that does a binary operation on the nodes.
//
// Returns the added node.
//
TIntermTyped *TIntermediate::addBinaryMath(
    TOperator op, TIntermTyped *left, TIntermTyped *right, const TSourceLoc &line)
{
    switch (op)
    {
      case EOpEqual:
      case EOpNotEqual:
        if (left->isArray())
            return NULL;
        break;
      case EOpLessThan:
      case EOpGreaterThan:
      case EOpLessThanEqual:
      case EOpGreaterThanEqual:
        if (left->isMatrix() || left->isArray() || left->isVector() ||
            left->getBasicType() == EbtStruct)
        {
            return NULL;
        }
        break;
      case EOpLogicalOr:
      case EOpLogicalXor:
      case EOpLogicalAnd:
        if (left->getBasicType() != EbtBool ||
            left->isMatrix() || left->isArray() || left->isVector())
        {
            return NULL;
        }
        break;
      case EOpAdd:
      case EOpSub:
      case EOpDiv:
      case EOpMul:
        if (left->getBasicType() == EbtStruct || left->getBasicType() == EbtBool)
            return NULL;
      default:
        break;
    }

    if (left->getBasicType() != right->getBasicType())
    {
        return NULL;
    }

    //
    // Need a new node holding things together then.  Make
    // one and promote it to the right type.
    //
    TIntermBinary *node = new TIntermBinary(op);
    node->setLine(line);

    node->setLeft(left);
    node->setRight(right);
    if (!node->promote(mInfoSink))
        return NULL;

    //
    // See if we can fold constants.
    //
    TIntermConstantUnion *leftTempConstant = left->getAsConstantUnion();
    TIntermConstantUnion *rightTempConstant = right->getAsConstantUnion();
    if (leftTempConstant && rightTempConstant)
    {
        TIntermTyped *typedReturnNode =
            leftTempConstant->fold(node->getOp(), rightTempConstant, mInfoSink);

        if (typedReturnNode)
            return typedReturnNode;
    }

    return node;
}

//.........这里部分代码省略.........
			bool rightToFloat = (rtype == EbtBool);
			// For modulus, if either is an integer, convert to float as well.
			if (op == EOpMod)
			{
				leftToFloat |= (ltype == EbtInt);
				rightToFloat |= (rtype == EbtInt);
			}
				
			if (leftToFloat)
			{
				left = ir_add_conversion (EOpConstructFloat, TType (EbtFloat, left->getPrecision(), left->getQualifier(), left->getColsCount(), left->getRowsCount(), left->isMatrix(), left->isArray()), left, ctx.infoSink);
				if (left == 0)
					return 0;
			}
			if (rightToFloat)
			{
				right = ir_add_conversion (EOpConstructFloat, TType (EbtFloat, right->getPrecision(), right->getQualifier(), right->getColsCount(), right->getRowsCount(), right->isMatrix(), right->isArray()), right, ctx.infoSink);
				if (right == 0)
					return 0;
			}
		}
		break;
	default:
		break;
	}
	
	// 
	// First try converting the children to compatible types.
	//
	
	if (!(left->getType().getStruct() && right->getType().getStruct()))
	{
		TIntermTyped* child = 0;
		bool useLeft = true; //default to using the left child as the type to promote to
		
		//need to always convert up
		if ( left->getType().getBasicType() != EbtFloat)
		{
			if ( right->getType().getBasicType() == EbtFloat)
			{
				useLeft = false;
			}
			else
			{
				if ( left->getType().getBasicType() != EbtInt)
				{
					if ( right->getType().getBasicType() == EbtInt)
						useLeft = false;
				}
			}
		}
		
		if (useLeft)
		{
			child = ir_add_conversion(op, left->getType(), right, ctx.infoSink);
			if (child)
				right = child;
			else
			{
				child = ir_add_conversion(op, right->getType(), left, ctx.infoSink);
				if (child)
					left = child;
				else
					return 0;
			}
		}

//
// Connect two nodes with a new parent that does a binary operation on the nodes.
//
// Returns the added node.
//
TIntermTyped* TIntermediate::addBinaryMath(TOperator op, TIntermTyped* left, TIntermTyped* right, TSourceLoc line, TSymbolTable& symbolTable)
{
    switch (op) {
        case EOpEqual:
        case EOpNotEqual:
            if (left->isArray())
                return 0;
            break;
        case EOpLessThan:
        case EOpGreaterThan:
        case EOpLessThanEqual:
        case EOpGreaterThanEqual:
            if (left->isMatrix() || left->isArray() || left->isVector() || left->getBasicType() == EbtStruct) {
                return 0;
            }
            break;
        case EOpLogicalOr:
        case EOpLogicalXor:
        case EOpLogicalAnd:
            if (left->getBasicType() != EbtBool || left->isMatrix() || left->isArray() || left->isVector()) {
                return 0;
            }
            break;
        case EOpAdd:
        case EOpSub:
        case EOpDiv:
        case EOpMul:
            if (left->getBasicType() == EbtStruct || left->getBasicType() == EbtBool)
                return 0;
        default: break;
    }

    //
    // First try converting the children to compatible types.
    //
    if (left->getType().getStruct() && right->getType().getStruct()) {
        if (left->getType() != right->getType())
            return 0;
    } else {
        TIntermTyped* child = addConversion(op, left->getType(), right);
        if (child)
            right = child;
        else {
            child = addConversion(op, right->getType(), left);
            if (child)
                left = child;
            else
                return 0;
        }
    }

    //
    // Need a new node holding things together then.  Make
    // one and promote it to the right type.
    //
    TIntermBinary* node = new TIntermBinary(op);
    if (line == 0)
        line = right->getLine();
    node->setLine(line);

    node->setLeft(left);
    node->setRight(right);
    if (!node->promote(infoSink))
        return 0;

    //
    // See if we can fold constants.
    //
    TIntermTyped* typedReturnNode = 0;
    TIntermConstantUnion *leftTempConstant = left->getAsConstantUnion();
    TIntermConstantUnion *rightTempConstant = right->getAsConstantUnion();
    if (leftTempConstant && rightTempConstant) {
        typedReturnNode = leftTempConstant->fold(node->getOp(), rightTempConstant, infoSink);

        if (typedReturnNode)
            return typedReturnNode;
    }

    return node;
}