This reverts commit 79902b439b.
Reason for revert: build broken on some platforms.
Change-Id: I5ceddc305580ff97f47ae27da831f99e96dab424
Reviewed-on: https://go-review.googlesource.com/37539
Reviewed-by: David R. Jenni <david.r.jenni@gmail.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
Found with honnef.co/go/tools/cmd/unused.
Change-Id: I54dab41d423050b883a3af1f5bb8c5119e2b7100
Reviewed-on: https://go-review.googlesource.com/37602
Reviewed-by: Alan Donovan <adonovan@google.com>
This function accounts for 2% of "godoc -analysis=pointer"
and this change makes it twice as fast---and simpler.
Added test and benchmark.
Change-Id: I8578fa42dce34df057d81f6c522a7b4e0506d09d
Reviewed-on: https://go-review.googlesource.com/15211
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Ilya Tocar <ilya.tocar@intel.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
This consistently yields better performance with go/pointer.
Also: return int not word from ntz().
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/97570044
intsets.Sparse is a sparse bit vector. It uses space proportional
to the number of elements, not the maximum element (as is the case for a dense bit vector).
A forthcoming CL will make use of it in go/pointer, where it reduces
solve time by 78%. A similar representation is used for Andersen's
analysis in gcc and LLVM.
+ Tests.
LGTM=sameer, crawshaw, gri
R=gri
CC=crawshaw, golang-codereviews, sameer
https://golang.org/cl/10837043
