[llvm] [GVN] Drop Clobber dependency if store may overwrite only the same value (PR #68322)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

Looks reasonable to me.

Compile-time: http://llvm-compile-time-tracker.com/compare.php?from=ff5e2babcb46e7eb3887ee265decb2948da2792c&to=8c6f93c8606faeb2a750cf7c31e0effd21bb88e6&stat=instructions:u
Code-size: http://llvm-compile-time-tracker.com/compare.php?from=ff5e2babcb46e7eb3887ee265decb2948da2792c&to=8c6f93c8606faeb2a750cf7c31e0effd21bb88e6&stat=size-text

https://github.com/llvm/llvm-project/pull/68322