This patch fixes the LBR check in the local lit config. The test would
segfault as the loop body would be basically empty, causing a divide by
zero error. More investigation is needed there so we do not actually hit
that assertion and report a cleaner error somewhere. Specifying an
actual opcode to benchmark fixes the problem. The test would also fail
as -mcpu was set to the default x86 CPU rather than the one currently
being run on, so it would always fail to find a perf counter. This patch
fixes that by simply removing the -mcpu flag.

Given these issues, I'm not sure these tests have ever run in the ~5
years they have been in tree. There were some issues reported in
\#132861, so I guess we'll see if there are further issues when the
testing becomes more broad.

This patch adds support for the NVIDIA Olympus core.

This does not add any special tuning decisions, and those may come
later.

We can't pass the AtomicType along to ASTContext::getFloatTypeSemantics.

See the attached test case.

This reverts commit f7aea4d081f77dba48b0fc019f59b678fb679aa8.

This broke the clang-solaris11-sparcv9 builder:
https://lab.llvm.org/buildbot/#/builders/13/builds/6151

We can use *Set::insert_range to collapse:

  for (auto Elem : Range)
    Set.insert(E);

down to:

  Set.insert_range(Range);

In some cases, we can further fold that into the set declaration.

The File ID is incorrectly calculated, resulting in an out-of-bounds
access. The test code is more complex because the File fetching only
happens in specific scenarios.

---------

Co-authored-by: ShaderKeeper <no-reply@shaderkeeper.com>
Co-authored-by: Chuanqi Xu <yedeng.yd@linux.alibaba.com>

RISCVInstrInfoSFB.td is for Short Forward Branch, not a kind of Vendor extension.