[PATCH] D123991: [LangRef] Clarify load/store of non-byte-sized types

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

For loads, the default lowering in the backends assume that the padding bits are 0. Which is only possible if the store explicitly wrote those padding bits to 0. The default lowering of stores does that if it was stored with the same type. I know we've had bugs in X86 related to this. I'll see if I can find any.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D123991/new/

https://reviews.llvm.org/D123991