[SCCP] Remove masking operations (#142736)
CVP version:
https://github.com/llvm/llvm-project/commit/2d5820cd72255e04aaef2da3c21d62396fdd7fb9
Compile-time impact:
https://llvm-compile-time-tracker.com/compare.php?from=3ec0c5c7fef03985b43432c6b914c289d8a5435e&to=92b4df90695dd37defdabf8a30f0b0322b648a00&stat=instructions:u
