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Revert r367941 "Add a note to the release not about a potentially breaking optimization" 

The note was moved to the release_90 branch in r367997.

llvm-svn: 367998
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Hans Wennborg 2019-08-06 08:32:33 +00:00
parent 001ecbde11
commit dba4dd1e8d
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llvm/docs/ReleaseNotes.rst
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@ -50,19 +50,6 @@ Non-comprehensive list of changes in this release
Makes programs 10x faster by doing Special New Thing.
Noteworthy optimizations
------------------------
* LLVM will now remove stores to constant memory (since this is a
contradiction) under the assumption the code in question must be dead. This
has proven to be problematic for some C/C++ code bases which expect to be
able to cast away 'const'. This is (and has always been) undefined
behavior, but up until now had not been actively utilized for optimization
purposes in this exact way. For more information, please see:
`bug 42763 <https://bugs.llvm.org/show_bug.cgi?id=42763>_` and
`post commit discussion <http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20190422/646945.html>_`.
Changes to the LLVM IR
----------------------