[clang] [clang] static operators should evaluate object argument (PR #68485)

[Tianlan Zhou via cfe-commits]

================
@@ -7806,7 +7806,8 @@ class ExprEvaluatorBase
       // Overloaded operator calls to member functions are represented as normal
       // calls with '*this' as the first argument.
       const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD);
-      if (MD && MD->isImplicitObjectMemberFunction()) {
+      if (MD &&
+          (MD->isImplicitObjectMemberFunction() || (OCE && MD->isStatic()))) {
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SuperSodaSea wrote:

It doesn't look like anything has gone wrong so far, but just to be on the safe side, maybe we could change the code below to this?

```diff
- This = &ThisVal;
+ if (MD->isInstance())
+   This = &ThisVal;
```

https://github.com/llvm/llvm-project/pull/68485