From 308615e63aec29ec35d4dbdf503b41deddf44f33 Mon Sep 17 00:00:00 2001
From: mattijs <mattijs>
Date: Thu, 4 Jan 2024 08:33:39 +0000
Subject: [PATCH] COMP: g++11: suppress optimisation. See #3024

---
 src/OpenFOAM/primitives/Tensor/TensorI.H | 28 ++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/src/OpenFOAM/primitives/Tensor/TensorI.H b/src/OpenFOAM/primitives/Tensor/TensorI.H
index 80d363f39e..8e6595a478 100644
--- a/src/OpenFOAM/primitives/Tensor/TensorI.H
+++ b/src/OpenFOAM/primitives/Tensor/TensorI.H
@@ -409,6 +409,10 @@ inline Foam::Tensor<Cmpt> Foam::Tensor<Cmpt>::T() const
 
 
 template<class Cmpt>
+#if defined(__GNUC__) && !defined(__clang__)
+// Workaround for gcc (11+) that fails to handle tensor dot vector
+__attribute__((optimize("no-tree-vectorize")))
+#endif
 inline Foam::Tensor<Cmpt>
 Foam::Tensor<Cmpt>::inner(const Tensor<Cmpt>& t2) const
 {
@@ -432,6 +436,10 @@ Foam::Tensor<Cmpt>::inner(const Tensor<Cmpt>& t2) const
 
 
 template<class Cmpt>
+#if defined(__GNUC__) && !defined(__clang__)
+// Workaround for gcc (11+) that fails to handle tensor dot vector
+__attribute__((optimize("no-tree-vectorize")))
+#endif
 inline Foam::Tensor<Cmpt>
 Foam::Tensor<Cmpt>::schur(const Tensor<Cmpt>& t2) const
 {
@@ -867,6 +875,10 @@ operator&(const Tensor<Cmpt>& t1, const Tensor<Cmpt>& t2)
 
 //- Inner-product of a SphericalTensor and a Tensor
 template<class Cmpt>
+#if defined(__GNUC__) && !defined(__clang__)
+// Workaround for gcc (11+) that fails to handle tensor dot vector
+__attribute__((optimize("no-tree-vectorize")))
+#endif
 inline Tensor<Cmpt>
 operator&(const SphericalTensor<Cmpt>& st1, const Tensor<Cmpt>& t2)
 {
@@ -881,6 +893,10 @@ operator&(const SphericalTensor<Cmpt>& st1, const Tensor<Cmpt>& t2)
 
 //- Inner-product of a Tensor and a SphericalTensor
 template<class Cmpt>
+#if defined(__GNUC__) && !defined(__clang__)
+// Workaround for gcc (11+) that fails to handle tensor dot vector
+__attribute__((optimize("no-tree-vectorize")))
+#endif
 inline Tensor<Cmpt>
 operator&(const Tensor<Cmpt>& t1, const SphericalTensor<Cmpt>& st2)
 {
@@ -895,6 +911,10 @@ operator&(const Tensor<Cmpt>& t1, const SphericalTensor<Cmpt>& st2)
 
 //- Inner-product of a SymmTensor and a Tensor
 template<class Cmpt>
+#if defined(__GNUC__) && !defined(__clang__)
+// Workaround for gcc (11+) that fails to handle tensor dot vector
+__attribute__((optimize("no-tree-vectorize")))
+#endif
 inline Tensor<Cmpt>
 operator&(const SymmTensor<Cmpt>& st1, const Tensor<Cmpt>& t2)
 {
@@ -917,6 +937,10 @@ operator&(const SymmTensor<Cmpt>& st1, const Tensor<Cmpt>& t2)
 
 //- Inner-product of a Tensor and a SymmTensor
 template<class Cmpt>
+#if defined(__GNUC__) && !defined(__clang__)
+// Workaround for gcc (11+) that fails to handle tensor dot vector
+__attribute__((optimize("no-tree-vectorize")))
+#endif
 inline Tensor<Cmpt>
 operator&(const Tensor<Cmpt>& t1, const SymmTensor<Cmpt>& st2)
 {
@@ -957,6 +981,10 @@ operator&(const Tensor<Cmpt>& t, const Vector<Cmpt>& v)
 
 //- Inner-product of a Vector and a Tensor
 template<class Cmpt>
+#if defined(__GNUC__) && !defined(__clang__)
+// Workaround for gcc (11+) that fails to handle tensor dot vector
+__attribute__((optimize("no-tree-vectorize")))
+#endif
 inline Vector<Cmpt>
 operator&(const Vector<Cmpt>& v, const Tensor<Cmpt>& t)
 {