[llvm] [WPD]: Enable speculative devirtualizatoin. (PR #159048)

[Hassnaa Hamdi via llvm-commits]

hassnaaHamdi wrote:

> Did the building of the ExportSummary get inadvertently removed from this PR? BTW, if you could please avoid force pushing when you update that would make reviewing much easier - as it is I am unable to compare to old versions. See https://llvm.org/docs/GitHub.html#rebasing-pull-requests-and-force-pushes.

I just dropped the commit related to building the ExportSummary. Sorry if that makes confusion. I follow your advice, thanks for it. 

https://github.com/llvm/llvm-project/pull/159048