[PATCH] D140750: [TargetLowering] Teach BuildUDIV to take advantage of leading zeros in the dividend.

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri accepted this revision.
lebedev.ri added a comment.
This revision is now accepted and ready to land.

LGTM, thank you!
I was wondering if something like this was there while writing that test :)



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Comment at: llvm/unittests/Support/DivisionByConstantTest.cpp:173
       continue; // Not supported by `UnsignedDivisionByConstantInfo::get()`.
-    if (Bits > 11)
+    if (Bits > 10)
       continue; // Unreasonably slow.
----------------
I have checked this still passes at 14 bits.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D140750/new/

https://reviews.llvm.org/D140750