Upgrade eigen to 3.4.0

Steps:
 * Removed common files between Android copy and the matching upstream copy
 * Obtained latest upstream tarball (see README.version)
 * Extracted over the directory

Bug: 148287349
Test: presubmit
Change-Id: Iee2744719075fdf000b315e973645923da766111

1 files changed, 12 insertions, 0 deletions

diff --git a/bench/perf_monitoring/trmv_lo.cpp b/bench/perf_monitoring/trmv_lo.cpp
new file mode 100644
index 000000000..3fabb6e54
--- /dev/null
+++ b/bench/perf_monitoring/trmv_lo.cpp
@@ -0,0 +1,12 @@
+#include "gemv_common.h"
+
+EIGEN_DONT_INLINE
+void trmv(const Mat &A, const Vec &B, Vec &C)
+{
+  C.noalias() += A.triangularView<Lower>() * B;
+}
+
+int main(int argc, char **argv)
+{
+  return main_gemv(argc, argv, trmv);
+}