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bug #1203: by-pass large stack-allocation in stableNorm if EIGEN_STACK_ALLOCATION_LIMIT is too small

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This commit is contained in:
Gael Guennebaud 2016-04-15 22:34:11 +02:00
parent 40c9923a8a
commit 2a7115daca
1 changed files with 4 additions and 3 deletions
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7
Eigen/src/Core/StableNorm.h
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@ -168,11 +168,12 @@ MatrixBase<Derived>::stableNorm() const
DerivedCopy copy(derived());
enum {
CanAlign = (int(Flags)&DirectAccessBit) || (int(internal::evaluator<DerivedCopyClean>::Alignment)>0) // FIXME
CanAlign = ( (int(DerivedCopyClean::Flags)&DirectAccessBit)
|| (int(internal::evaluator<DerivedCopyClean>::Alignment)>0) // FIXME Alignment)>0 might not be enough
) && (blockSize*sizeof(Scalar)*2<EIGEN_STACK_ALLOCATION_LIMIT) // ifwe cannot allocate on the stack, then let's not bother about this optimization
};
typedef typename internal::conditional<CanAlign, Ref<const Matrix<Scalar,Dynamic,1,0,blockSize,1>, internal::evaluator<DerivedCopyClean>::Alignment>,
typename DerivedCopyClean
::ConstSegmentReturnType>::type SegmentWrapper;
typename DerivedCopyClean::ConstSegmentReturnType>::type SegmentWrapper;
Index n = size();
if(n==1)