EricWF marked 2 inline comments as done.
EricWF added inline comments.

================
Comment at: test/CodeGenCXX/builtin-launder.cpp:93-96
+/// The test cases in this namespace technically need to be laundered according
+/// to the language in the standard (ie they have const or reference 
subobjects)
+/// but LLVM doesn't currently optimize on these cases -- so Clang emits
+/// __builtin_launder as a nop.
----------------
rsmith wrote:
> I would note that this means adding optimizations for those cases later is an 
> LTO ABI break. That's probably OK, but just something we're going to need to 
> remember.
I added your note almost verbatim to the test case.


https://reviews.llvm.org/D40218



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