[PATCH] D140210: [IPSCCP] Enable specialization of functions.

[Alexandros Lamprineas via Phabricator via llvm-commits]

labrinea added a comment.

In D140210#4001148 <https://reviews.llvm.org/D140210#4001148>, @SjoerdMeijer wrote:

> Great stuff, and impressive numbers, I think they look really good.
>
> CTMark compile time numbers look really good. I was thinking if we could at least add one more data point: timed compilation of LLVM. I would be interested in both the instruction count increase, like you reported for CTMark, but also in absolute timings just to get an idea. And you built Chromium for correctness testing (nice!), did you get any compile time numbers while doing that exercise?

I have measured the time spent on the IPSCCP pass itself (user+system time) during linking using the `-time-passes` option on lld. On my x86 machine with O3 <https://reviews.llvm.org/owners/package/3/> and Full LTO the Geomean of CTMark goes from ~152ms to ~174ms resulting +14.47% increase (average of five best runs). Regarding the Chromium build, no I haven't measured compilation times.


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