[clang] [clang][ssaf] Add EntityLinkage data structure (PR #181718)

[Aviral Goel via cfe-commits]

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@@ -23,8 +24,11 @@ namespace clang::ssaf {
 class TUSummary {
   /// Identifies the translation unit.
   BuildNamespace TUNamespace;
+
   EntityIdTable IdTable;
 
+  std::map<EntityId, EntityLinkage> LinkageTable;
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aviralg wrote:

I agree. We had a discussion with @jkorous-apple and his design choice is to have separate maps for separate chunks of information. That way we only make available what is needed at a given point. This follows the ECS design pattern used in game design.

https://github.com/llvm/llvm-project/pull/181718