Fix vectorization of swap for non trivial expressions

1 files changed, 4 insertions, 2 deletions

diff --git a/test/swap.cpp b/test/swap.cpp
index dc3610085..5d6f0e6af 100644
--- a/test/swap.cpp
+++ b/test/swap.cpp
@@ -82,8 +82,10 @@ template<typename MatrixType> void swap(const MatrixType& m)
 
 void test_swap()
 {
+  int s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE);
   CALL_SUBTEST_1( swap(Matrix3f()) ); // fixed size, no vectorization 
   CALL_SUBTEST_2( swap(Matrix4d()) ); // fixed size, possible vectorization 
-  CALL_SUBTEST_3( swap(MatrixXd(3,3)) ); // dyn size, no vectorization 
-  CALL_SUBTEST_4( swap(MatrixXf(30,30)) ); // dyn size, possible vectorization 
+  CALL_SUBTEST_3( swap(MatrixXd(s,s)) ); // dyn size, no vectorization 
+  CALL_SUBTEST_4( swap(MatrixXf(s,s)) ); // dyn size, possible vectorization 
+  TEST_SET_BUT_UNUSED_VARIABLE(s)
 }