[clang] [clang][Interp] Zero-init remaining string literal elements (PR #66862)

[Timm Baeder via cfe-commits]

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@@ -858,8 +858,8 @@ bool ByteCodeExprGen<Emitter>::VisitStringLiteral(const StringLiteral *E) {
 
   // If the initializer string is too long, a diagnostic has already been
   // emitted. Read only the array length from the string literal.
-  unsigned N =
-      std::min(unsigned(CAT->getSize().getZExtValue()), E->getLength());
+  unsigned ArraySize = CAT->getSize().getZExtValue();
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tbaederr wrote:

It's a bit tricky since `StringLiteral::getLength()` returns `unsigned` again, so we can't use the extra bytes anyway and need to cast to `unsigned` for the `std::min()`.

https://github.com/llvm/llvm-project/pull/66862