Add a note to the release not about a potentially breaking optimization
authorPhilip Reames <listmail@philipreames.com>
Mon, 5 Aug 2019 22:34:59 +0000 (22:34 +0000)
committerPhilip Reames <listmail@philipreames.com>
Mon, 5 Aug 2019 22:34:59 +0000 (22:34 +0000)
commite39e79358fcdd5d8ad809defaa821f0bbfa809a5
treefbfa92766ea0b0750828bc803624f4d7a043901f
parentf708f0a2430f3a50b8836f4bd5510169dea359eb
Add a note to the release not about a potentially breaking optimization

This has come up twice already (once in pr42763 and once in the commit thread), so give warning of a new way in which UB can result in unexpected program behavior.

llvm-svn: 367941
llvm/docs/ReleaseNotes.rst