[PATCH] D158267: [clang][CodeGen] Avoid emitting unnecessary memcpy of records without content

[Eli Friedman via Phabricator via cfe-commits]

efriedma added a comment.

This looks sort of similar to CodeGen::isEmptyRecord... but I guess it's not quite the same thing.  (Even if a struct isn't "empty" in the ABI sense, there still might not be anything to copy.)

Instead of looking for zero-length bitfields, you probably want to just check isUnnamedBitfield()?  Unnamed bitfields are just padding, whether or not they're zero-length.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D158267/new/

https://reviews.llvm.org/D158267