From 0315fb319ae592d7b2dc092a8ff9b84e20a1edfb Mon Sep 17 00:00:00 2001
From: Yu You <youyu3@gmail.com>
Date: Fri, 9 Jan 2026 11:46:37 -0800
Subject: [PATCH] Change inline hint for
 `general_matrix_vector_product<>::run()` to gain performance

libeigen/eigen!2092
---
 Eigen/src/Core/products/GeneralMatrixVector.h | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/Eigen/src/Core/products/GeneralMatrixVector.h b/Eigen/src/Core/products/GeneralMatrixVector.h
index ba72a8a4f..b974fb6bd 100644
--- a/Eigen/src/Core/products/GeneralMatrixVector.h
+++ b/Eigen/src/Core/products/GeneralMatrixVector.h
@@ -97,14 +97,13 @@ struct general_matrix_vector_product<Index, LhsScalar, LhsMapper, ColMajor, Conj
   typedef typename QuarterTraits::RhsPacket RhsPacketQuarter;
   typedef typename QuarterTraits::ResPacket ResPacketQuarter;
 
-  EIGEN_DEVICE_FUNC EIGEN_DONT_INLINE static void run(Index rows, Index cols, const LhsMapper& lhs,
-                                                      const RhsMapper& rhs, ResScalar* res, Index resIncr,
-                                                      RhsScalar alpha);
+  EIGEN_DEVICE_FUNC inline static void run(Index rows, Index cols, const LhsMapper& lhs, const RhsMapper& rhs,
+                                           ResScalar* res, Index resIncr, RhsScalar alpha);
 };
 
 template <typename Index, typename LhsScalar, typename LhsMapper, bool ConjugateLhs, typename RhsScalar,
           typename RhsMapper, bool ConjugateRhs, int Version>
-EIGEN_DEVICE_FUNC EIGEN_DONT_INLINE void
+EIGEN_DEVICE_FUNC inline void
 general_matrix_vector_product<Index, LhsScalar, LhsMapper, ColMajor, ConjugateLhs, RhsScalar, RhsMapper, ConjugateRhs,
                               Version>::run(Index rows, Index cols, const LhsMapper& alhs, const RhsMapper& rhs,
                                             ResScalar* res, Index resIncr, RhsScalar alpha) {
@@ -290,14 +289,13 @@ struct general_matrix_vector_product<Index, LhsScalar, LhsMapper, RowMajor, Conj
   typedef typename QuarterTraits::RhsPacket RhsPacketQuarter;
   typedef typename QuarterTraits::ResPacket ResPacketQuarter;
 
-  EIGEN_DEVICE_FUNC EIGEN_DONT_INLINE static void run(Index rows, Index cols, const LhsMapper& lhs,
-                                                      const RhsMapper& rhs, ResScalar* res, Index resIncr,
-                                                      ResScalar alpha);
+  EIGEN_DEVICE_FUNC static inline void run(Index rows, Index cols, const LhsMapper& lhs, const RhsMapper& rhs,
+                                           ResScalar* res, Index resIncr, ResScalar alpha);
 };
 
 template <typename Index, typename LhsScalar, typename LhsMapper, bool ConjugateLhs, typename RhsScalar,
           typename RhsMapper, bool ConjugateRhs, int Version>
-EIGEN_DEVICE_FUNC EIGEN_DONT_INLINE void
+EIGEN_DEVICE_FUNC inline void
 general_matrix_vector_product<Index, LhsScalar, LhsMapper, RowMajor, ConjugateLhs, RhsScalar, RhsMapper, ConjugateRhs,
                               Version>::run(Index rows, Index cols, const LhsMapper& alhs, const RhsMapper& rhs,
                                             ResScalar* res, Index resIncr, ResScalar alpha) {