From b2058da0b05a0b28be8a5064e54e7f2da92cbdae Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lars=20G=C3=B6ttgens?= <lars.goettgens@rwth-aachen.de>
Date: Wed, 23 Oct 2024 14:34:10 +0200
Subject: [PATCH] Skip deepcopy in addmul! in case of aliasing

---
 src/Sparse/Row.jl | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Sparse/Row.jl b/src/Sparse/Row.jl
index b4e08c7161..0f9d5cd882 100644
--- a/src/Sparse/Row.jl
+++ b/src/Sparse/Row.jl
@@ -839,10 +839,16 @@ function mul!(z::SRow{T}, c, y::SRow{T}) where T
 end
 
 function addmul!(z::SRow{T}, x::SRow{T}, y) where T
+  if z === x
+    return scale_row_right!(x, y+1)
+  end
   return add_right_scaled_row!(x, z, y)
 end
 
 function addmul!(z::SRow{T}, x, y::SRow{T}) where T
+  if z === x
+    return scale_row_left!(y, x+1)
+  end
   return add_left_scaled_row!(y, z, x)
 end