[clang] [compiler-rt] [Sanitizer] add signed-integer-wrap sanitizer (PR #80089)

[Fangrui Song via llvm-commits]

MaskRay wrote:

> GCC folks have not answered. Adding -wrap keeps the behavior for -overflow the same between GCC and Clang. Can we please move this forward and land it as is? We can trivially change this in the future if we need to.

I believe we can move forward by reusing `-fsanitize=signed-integer-overflow`, which adds least complexity to Clang and is very reasonable.

https://github.com/llvm/llvm-project/pull/80089