[libcxx-commits] [clang] [libcxx] [clang] Add builtin to clear padding bytes (prework for P0528R3) (PR #75371)

[Eli Friedman via libcxx-commits]

https://github.com/efriedma-quic commented:

Alignment changes look okay.

For where we do the computation... I think this is fine for now; we can refactor if it turns out there are other places which need this information.  The overlap with record layout is relatively minor.

Added a couple more comments. (I didn't mean to iterate this way, but I didn't catch the issues previosly.)

https://github.com/llvm/llvm-project/pull/75371