[clang] [Clang] Detect bit copies that should be relocation. (PR #139104)

[via cfe-commits]

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@@ -853,6 +853,13 @@ def warn_cxxstruct_memaccess : Warning<
   "first argument in call to "
   "%0 is a pointer to non-trivially copyable type %1">,
   InGroup<NonTrivialMemcall>;
+
+def warn_cxxstruct_memaccess_relocatable
+    : Warning<"calling %0 with a pointer to a type %1 which is trivially "
+              "relocatable "
+              "but not trivially copyable; did you mean to call %2?">,
----------------
Sirraide wrote:

```suggestion
              "but not trivially copyable; did you mean to call '%2'?">,
```
This one needs to be quoted manually because it’s just a `StringRef`.

https://github.com/llvm/llvm-project/pull/139104