[clang] [clang][analyzer] Add notes to PointerSubChecker (PR #95899)

[Balázs Kéri via cfe-commits]

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@@ -144,9 +144,24 @@ void PointerSubChecker::checkPreStmt(const BinaryOperator *B,
     // Allow arithmetic on different symbolic regions.
     if (isa<SymbolicRegion>(SuperLR) || isa<SymbolicRegion>(SuperRR))
       return;
+    if (const auto *SuperDLR = dyn_cast<DeclRegion>(SuperLR))
+      DiffDeclL = SuperDLR->getDecl();
+    if (const auto *SuperDRR = dyn_cast<DeclRegion>(SuperRR))
+      DiffDeclR = SuperDRR->getDecl();
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balazske wrote:

Warning is now omitted if both would be at the same declaration.

https://github.com/llvm/llvm-project/pull/95899