From 55db357dac409f85e765af4d4f8141bf6f9af3c3 Mon Sep 17 00:00:00 2001
From: Jean-Paul Pelteret <jppelteret@gmail.com>
Date: Wed, 15 Jun 2022 02:25:53 +0200
Subject: [PATCH] CMake: Introduce forced failure for SSE2 vectorisation
 configuration.

---
 cmake/checks/check_02_compiler_features.cmake | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cmake/checks/check_02_compiler_features.cmake b/cmake/checks/check_02_compiler_features.cmake
index 22345f01..b631ba3d 100644
--- a/cmake/checks/check_02_compiler_features.cmake
+++ b/cmake/checks/check_02_compiler_features.cmake
@@ -154,6 +154,11 @@ WF_CHECK_CXX_SOURCE_RUNS(
     do_test<double, 2>();
     do_test<float, 4>();
   #endif
+    
+    // All indications are that _mm_sqrt_pd() sporadically segfaults with zero input vector.
+  #if DEAL_II_VECTORIZATION_WIDTH_IN_BITS == 128
+    static_assert(false, 'Problematic vectorization width detected.');
+  #endif
 
     do_test<double, 1>();
     do_test<float, 1>();