[llvm] [Attributor]: AApointerInfo - store the full chain of instructions that make up the access (PR #96526)

[Shilei Tian via llvm-commits]

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@@ -6078,11 +6222,56 @@ struct AAPointerInfo : public AbstractAttribute {
       }
     }
 
+    void mergeAccessPaths(const AccessPathSetTy *AccessPathsNew) const {
+
+      for (auto *Path : *AccessPathsNew)
+        if (!existsChain(Path))
+          AccessPaths->insert(Path);
+    }
+
+    bool checkAccessPathsAreSame(const AccessPathSetTy *AccessPathsR) const {
+
+      bool IsSame = true;
+
+      if (AccessPaths->size() != AccessPathsR->size())
+        return false;
+
+      for (auto *Path : *AccessPathsR) {
+        if (!existsChain(Path))
+          IsSame = false;
+      }
+      return IsSame;
+    }
+
+    bool existsChain(const AccessPathTy *NewPath) const {
+
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shiltian wrote:

```suggestion
```

https://github.com/llvm/llvm-project/pull/96526