[clang] [clang][dataflow] Strengthen pointer comparison. (PR #75170)

[Gábor Horváth via cfe-commits]

================
@@ -152,6 +153,47 @@ TEST_F(EnvironmentTest, JoinRecords) {
   }
 }
 
+TEST_F(EnvironmentTest, DifferentReferenceLocInJoin) {
----------------
Xazax-hun wrote:

While running analysis on C++ code is indirect, it has the advantage of documenting what code can trigger such behavior. I think having direct tests is fine, I just wanted to make this decision explicit. 

https://github.com/llvm/llvm-project/pull/75170