[clang] [clang][Interp] Integral pointers (PR #84159)

[Aaron Ballman via cfe-commits]

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@@ -1912,6 +1929,10 @@ inline bool NoRet(InterpState &S, CodePtr OpPC) {
 
 inline bool NarrowPtr(InterpState &S, CodePtr OpPC) {
   const Pointer &Ptr = S.Stk.pop<Pointer>();
+  if (!S.getLangOpts().CPlusPlus) {
+    S.Stk.push<Pointer>(Ptr);
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AaronBallman wrote:

Might be a good idea to comment why the C logic is different from the C++ logic.

https://github.com/llvm/llvm-project/pull/84159