[clang] [clang][bytecode] Implement the constexpr built-in abs function. (PR #112459)

[Timm Baeder via cfe-commits]

tbaederr wrote:

> This patch fixes the issue.

What issue? Is there a bug open about this?

You didn't implement it for the bytecode interpreter at all, only for the current interpreter.

https://github.com/llvm/llvm-project/pull/112459