[PATCH] D75801: [InstCombine] Remove known bits constant folding (WIP)

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

In D75801#1922970 <https://reviews.llvm.org/D75801#1922970>, @nikic wrote:

> @lebedev.ri Finally got around to implementing some compile-time testing infrastructure today, here's some numbers (in terms of instructions retired) for this change: F11561365: Screenshot from 2020-03-14 18-03-53.png <https://reviews.llvm.org/F11561365> Basically this is a 1-2% end-to-end improvement for `-O3` compile-times.


http://llvm-compile-time-tracker.com/?config=O3&stat=wall-time
That looks great!
Is that end-to-end time for the entire compile or just 'opt -O3'?


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