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Optimize expression matching "d?=a-b*c" as "d?=a; d?=b*c;"

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This commit is contained in:
Gael Guennebaud
2016-08-23 16:52:22 +02:00
parent e47a8928ec
commit 504a4404f1
3 changed files with 28 additions and 19 deletions
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8
test/product.h
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@@ -119,6 +119,14 @@ template<typename MatrixType> void product(const MatrixType& m)
res.noalias() -= square + m1 * m2.transpose();
VERIFY_IS_APPROX(res, square + m1 * m2.transpose());
// test d ?= a-b*c rules
res.noalias() = square - m1 * m2.transpose();
VERIFY_IS_APPROX(res, square - m1 * m2.transpose());
res.noalias() += square - m1 * m2.transpose();
VERIFY_IS_APPROX(res, 2*(square - m1 * m2.transpose()));
res.noalias() -= square - m1 * m2.transpose();
VERIFY_IS_APPROX(res, square - m1 * m2.transpose());
tm1 = m1;
VERIFY_IS_APPROX(tm1.transpose() * v1, m1.transpose() * v1);