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work around internal compiler error with gcc 4.1 and 4.2, reported on the forum

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This commit is contained in:
Benoit Jacob 2009-08-20 12:19:15 -04:00
parent c7ae261ac0
commit 72b002eab9
1 changed files with 16 additions and 5 deletions
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19
Eigen/src/Core/Product.h
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@ -61,11 +61,22 @@ template<typename Lhs, typename Rhs> struct ei_product_type
enum {
Rows = Lhs::RowsAtCompileTime,
Cols = Rhs::ColsAtCompileTime,
Depth = EIGEN_ENUM_MIN(Lhs::ColsAtCompileTime,Rhs::RowsAtCompileTime),
Depth = EIGEN_ENUM_MIN(Lhs::ColsAtCompileTime,Rhs::RowsAtCompileTime)
};
value = ei_product_type_selector<(Rows >=EIGEN_CACHEFRIENDLY_PRODUCT_THRESHOLD ? Large : (Rows==1 ? 1 : Small)),
(Cols >=EIGEN_CACHEFRIENDLY_PRODUCT_THRESHOLD ? Large : (Cols==1 ? 1 : Small)),
(Depth>=EIGEN_CACHEFRIENDLY_PRODUCT_THRESHOLD ? Large : (Depth==1 ? 1 : Small))>::ret
// the splitting into different lines of code here, introducing the _select enums and the typedef below,
// is to work around an internal compiler error with gcc 4.1 and 4.2.
private:
enum {
rows_select = Rows >=EIGEN_CACHEFRIENDLY_PRODUCT_THRESHOLD ? Large : (Rows==1 ? 1 : Small),
cols_select = Cols >=EIGEN_CACHEFRIENDLY_PRODUCT_THRESHOLD ? Large : (Cols==1 ? 1 : Small),
depth_select = Depth>=EIGEN_CACHEFRIENDLY_PRODUCT_THRESHOLD ? Large : (Depth==1 ? 1 : Small)
};
typedef ei_product_type_selector<rows_select, cols_select, depth_select> product_type_selector;
public:
enum {
value = product_type_selector::ret
};
};