[compiler-rt] [asan] Speed up ASan ODR indicator-based checking (PR #100923)

[Vitaly Buka via llvm-commits]

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@@ -35,8 +36,11 @@ struct ListOfGlobals {
   ListOfGlobals *next;
 };
 
+typedef DenseMap<uptr, ListOfGlobals *> MapOfGlobals;
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vitalybuka wrote:

It would be nice to have such small refactoring out of real patches.
Assuming we are in different time zones, to avoid unnecessary iterations, I will extract land it separately.

https://github.com/llvm/llvm-project/pull/100923