From a99100f88aaf330262de0bb391b49668818c95de Mon Sep 17 00:00:00 2001
From: Dmitri Naumov <dmitri.naumov@ufz.de>
Date: Mon, 21 Aug 2017 15:37:49 +0200
Subject: [PATCH] Disable eigen vectorization by default.
---
CMakeLists.txt | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 76242cff996..4593697ea34 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -90,6 +90,13 @@ option(OGS_USE_EIGEN_UNSUPPORTED "Use Eigen unsupported modules" ON)
option(OGS_EIGEN_INITIALIZE_MATRICES_BY_NAN "" ON)
option(EIGEN_NO_DEBUG "Disables Eigen's assertions" OFF)
+# We assume that it's save to use vectorization with Eigen < 3.3 (strictly smaller than 3.3.!).
+# At least we only observed vectorization issues with Eigen 3.3.x.
+# If you want to use Eigen vectorization, make sure that you run all the ctests several times, e.g.:
+# $ ctest --repeat-until-fail 50
+# You might also want to take a look at https://github.com/ufz/ogs/issues/1881.
+option(EIGEN_DONT_VECTORIZE "Disables explicit vectorization when defined." ON)
+
set(OGS_EIGEN_DYNAMIC_SHAPE_MATRICES "Default" CACHE STRING "Use dynamically allocated shape matrices")
set_property(CACHE OGS_EIGEN_DYNAMIC_SHAPE_MATRICES
PROPERTY STRINGS "Default" "ON" "OFF")
@@ -192,6 +199,11 @@ endif()
if (EIGEN_NO_DEBUG)
add_definitions(-DEIGEN_NO_DEBUG)
endif()
+
+if (EIGEN_DONT_VECTORIZE)
+ add_definitions(-DEIGEN_DONT_VECTORIZE)
+endif()
+
if(OGS_EIGEN_DYNAMIC_SHAPE_MATRICES_INTERNAL)
add_definitions(-DOGS_EIGEN_DYNAMIC_SHAPE_MATRICES)
endif()
--
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