[clang] [clang][byte] Add callback mechanism to handle constexpr for unary integer ops (PR #160280)

[Timm Baeder via cfe-commits]

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@@ -2551,6 +2525,23 @@ static bool interp__builtin_is_within_lifetime(InterpState &S, CodePtr OpPC,
   return true;
 }
 
+static bool interp__builtin_elementwise_int_unaryop(
+    InterpState &S, CodePtr OpPC, const CallExpr *Call,
+    llvm::function_ref<APInt(const APSInt &)> Fn) {
+  assert(Call->getType()->isIntegerType() && Call->getNumArgs() == 1);
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tbaederr wrote:

This should be two separate asserts so we know what the problem is if it fails

https://github.com/llvm/llvm-project/pull/160280