[llvm] fb109c4 - [DSE] Switch to MemorySSA-backed DSE by default.

[Jeremy Morse via llvm-commits]

Hi Florian,

It looks like this patch failed a compiler-rt dfsan test on this buildbot

  http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux/builds/29539
  compiler-rt/test/dfsan/event_callbacks.c

Which I've documented in https://bugs.llvm.org/show_bug.cgi?id=47488 .
I believe it's just the test being fragile, so have marked it XFail
for now and asked the authors how it should be fixed.

--
Thanks,
Jeremy