From ee1eb83d270a87dcd5a382e632ea2d1e33b23559 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Santiago=20Ospina=20De=20Los=20R=C3=ADos?=
 <sospinar@gmail.com>
Date: Mon, 6 Oct 2025 20:15:23 +0200
Subject: [PATCH] Uses lowest() instead of min/max for initial value

Replaces the custom handling (post g++-4.4) of minimum and maximum values for integral and floating-point types with std::numeric_limits::lowest().
---
 opm/simulators/linalg/ParallelIstlInformation.hpp | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/opm/simulators/linalg/ParallelIstlInformation.hpp b/opm/simulators/linalg/ParallelIstlInformation.hpp
index ca14dbbbfe..4037c10af6 100644
--- a/opm/simulators/linalg/ParallelIstlInformation.hpp
+++ b/opm/simulators/linalg/ParallelIstlInformation.hpp
@@ -254,17 +254,7 @@ private:
         template<class T>
         T getInitialValue()
         {
-            //g++-4.4 does not support std::numeric_limits<T>::lowest();
-            // we rely on IEE 754 for floating point values and use min()
-            // for integral types.
-            if( std::is_integral<T>::value )
-            {
-                return std::numeric_limits<T>::min();
-            }
-            else
-            {
-                return -std::numeric_limits<T>::max();
-            }
+            return std::numeric_limits<T>::lowest();
         }
         /// \brief Get the underlying binary operator.
         ///