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

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

Agree. The original test case was minimized from a failing assertion, but it would likely be fiddly to try and recreate a test case that triggers this again. Testing directly also has the benefit of being less brittle, so I think it's an acceptable tradeoff in this case.

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