From 90d17a007d579e7cd352a696a45b86e5d653f258 Mon Sep 17 00:00:00 2001
From: Max Andriychuk <valerii@maxs-laptop.speedport.ip>
Date: Fri, 1 Nov 2024 16:31:28 +0100
Subject: [PATCH] Don't mark constant parameters as varied

---
 lib/Differentiator/DiffPlanner.cpp | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/Differentiator/DiffPlanner.cpp b/lib/Differentiator/DiffPlanner.cpp
index b4c7018a2..d501ac614 100644
--- a/lib/Differentiator/DiffPlanner.cpp
+++ b/lib/Differentiator/DiffPlanner.cpp
@@ -624,7 +624,19 @@ namespace clad {
       return true;
 
     if (!m_ActivityRunInfo.HasAnalysisRun) {
-      std::copy(Function->param_begin(), Function->param_end(),
+      ArrayRef<ParmVarDecl*> FDparam = Function->parameters();
+      std::vector<ParmVarDecl*> derivedParam;
+
+      for(auto* parameter: FDparam){
+        QualType parType = parameter->getType();
+        if(parType->isPointerType()){
+          if(!parType->getPointeeType().isConstQualified())
+            derivedParam.push_back(parameter);
+        }else if(!parType.isConstQualified())
+            derivedParam.push_back(parameter);
+      }
+
+      std::copy(derivedParam.begin(), derivedParam.end(),
                 std::inserter(m_ActivityRunInfo.ToBeRecorded,
                               m_ActivityRunInfo.ToBeRecorded.end()));