[llvm] [clang] [clang-tools-extra] [llvm-profdata] Emit warning when counter value is greater than 2^56. (PR #69513)

[Zequan Wu via cfe-commits]

ZequanWu wrote:

> Just to double check: the commit message says "emit warning", but it should error by default, right?

Yes, -failure-mode=any is default, which throws an error if there is any.

https://github.com/llvm/llvm-project/pull/69513