[clang] [clang] Add nuw attribute to GEPs (PR #105496)

[Vitaly Buka via cfe-commits]

vitalybuka wrote:

> > This patch breaks: https://lab.llvm.org/buildbot/#/builders/25/builds/1952 https://lab.llvm.org/buildbot/#/builders/52/builds/1775
> 
> From the buildbot run I can see 12 or 13 changes in the build that failed. Just out of curiosity how did you find out it was this patch that caused it?

Bisected and reverted locally.

https://github.com/llvm/llvm-project/pull/105496