2 Commits

Author	SHA1	Message	Date
Richard Smith	edb9fbb78a	Make -Watomic-alignment say whether the atomic operation was oversized ... or misaligned. llvm-svn: 341710	2018-09-07 21:24:27 +00:00
Tim Northover	9dc1d0c74e	[Atomics] warn about atomic accesses using libcalls ... If an atomic variable is misaligned (and that suspicion is why Clang emits libcalls at all) the runtime support library will have to use a lock to safely access it, with potentially very bad performance consequences. There's a very good chance this is unintentional so it makes sense to issue a warning. Also give it a named group so people can promote it to an error, or disable it if they really don't care. llvm-svn: 330566	2018-04-23 08:16:24 +00:00