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Fix CoeffReadCost in Part: it must account for the cost of the

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conditional jump. This makes Part considered an "expensive" xpr
 that must be evaluated in operations such as Product.
This fixes bug #80.
This commit is contained in:
Benoit Jacob 2010-01-02 13:04:04 -05:00
parent e4c88c14ec
commit ba6ed5fa5f
1 changed files with 1 additions and 1 deletions
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Eigen/src/Core/Part.h
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@ -50,7 +50,7 @@ struct ei_traits<Part<MatrixType, Mode> > : ei_traits<MatrixType>
typedef typename ei_unref<MatrixTypeNested>::type _MatrixTypeNested;
enum {
Flags = (_MatrixTypeNested::Flags & (HereditaryBits) & (~(PacketAccessBit | DirectAccessBit | LinearAccessBit))) | Mode,
CoeffReadCost = _MatrixTypeNested::CoeffReadCost
CoeffReadCost = _MatrixTypeNested::CoeffReadCost + ConditionalJumpCost
};
};