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author | Gael Guennebaud <g.gael@free.fr> | 2017-01-17 18:03:35 +0100 |
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committer | Gael Guennebaud <g.gael@free.fr> | 2017-01-17 18:03:35 +0100 |
commit | 655ba783f8b2c9a8c3f4edb45e6db468aca22188 (patch) | |
tree | c71924c27b1b4746acd108e254e721c51f376085 /test/product_mmtr.cpp | |
parent | c4fc2611ba34652f98b5e0ac9f817879bef8eed1 (diff) |
Defer set-to-zero in triangular = product so that no aliasing issue occur in the common:
A.triangularView() = B*A.sefladjointView()*B.adjoint()
case that used to work in 3.2.
Diffstat (limited to 'test/product_mmtr.cpp')
-rw-r--r-- | test/product_mmtr.cpp | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/test/product_mmtr.cpp b/test/product_mmtr.cpp index b66529acd..f6e4bb1ae 100644 --- a/test/product_mmtr.cpp +++ b/test/product_mmtr.cpp @@ -62,6 +62,19 @@ template<typename Scalar> void mmtr(int size) CHECK_MMTR(matc, Upper, -= (s*sqc).template triangularView<Upper>()*sqc); CHECK_MMTR(matc, Lower, = (s*sqr).template triangularView<Lower>()*sqc); CHECK_MMTR(matc, Upper, += (s*sqc).template triangularView<Lower>()*sqc); + + // check aliasing + ref2 = ref1 = matc; + ref1 = sqc.adjoint() * matc * sqc; + ref2.template triangularView<Upper>() = ref1.template triangularView<Upper>(); + matc.template triangularView<Upper>() = sqc.adjoint() * matc * sqc; + VERIFY_IS_APPROX(matc, ref2); + + ref2 = ref1 = matc; + ref1 = sqc * matc * sqc.adjoint(); + ref2.template triangularView<Lower>() = ref1.template triangularView<Lower>(); + matc.template triangularView<Lower>() = sqc * matc * sqc.adjoint(); + VERIFY_IS_APPROX(matc, ref2); } void test_product_mmtr() |