Add an option to exclude specific sections.

In D85368#2205653, @hiraditya wrote:

Thanks for adding the results, could you share the script to measure bootstrap numbers?

I've uploaded a Makefile here which will allow you to run the bootstrap benchmarks. Applying this patch on a local llvm repo and pointing the Makefile at it should be sufficient to get you going.

Update PSI metadata to fix assert failure.

Could you share the details of the machine as well?

Sure, these were measured on a Lenovo P920 workstation -- Intel Skylake based Xeon(R) Gold 6154 CPU.

Simplify the cold count check.

Updated diff based on review comments.

LGTM

Updated string types based on reviewer comments.

@efriedma Thanks for the pointers on LLVM string types. Updated the diff with changes, please take a look. Thanks!

Thanks for the reviews @eli.friedman @tmsriram.
Can someone go ahead and push this this for me since I don't have commit access?

Addressed review comment.

Use a ".text.eh" prefix instead of ".eh" suffix for exception machine basic block sections.
Update the basic-block-sections-clusters-eh test.