[clang] [RFC] Initial implementation of P2719 (PR #113510)

[Aaron Ballman via cfe-commits]

================
@@ -1773,14 +1776,40 @@ static bool isNonPlacementDeallocationFunction(Sema &S, FunctionDecl *FD) {
 namespace {
   struct UsualDeallocFnInfo {
     UsualDeallocFnInfo() : Found(), FD(nullptr) {}
-    UsualDeallocFnInfo(Sema &S, DeclAccessPair Found)
+    UsualDeallocFnInfo(Sema &S, DeclAccessPair Found, QualType AllocType)
         : Found(Found), FD(dyn_cast<FunctionDecl>(Found->getUnderlyingDecl())),
           Destroying(false), HasSizeT(false), HasAlignValT(false),
-          CUDAPref(SemaCUDA::CFP_Native) {
-      // A function template declaration is never a usual deallocation function.
-      if (!FD)
-        return;
+          HasTypeIdentity(false), CUDAPref(SemaCUDA::CFP_Native) {
+      // A function template declaration is only a usual deallocation function
+      // if it is a typed delete
----------------
AaronBallman wrote:

```suggestion
      // if it is a typed delete.
```

https://github.com/llvm/llvm-project/pull/113510