Shawn Landden f2e60fc4e8 [SimpligyCFG] NFC intended, remove GCD that was only used for powers of two ...

and replace with an equilivent countTrailingZeros.

GCD is much more expensive than this, with repeated division.

This depends on D60823

Differential Revision: https://reviews.llvm.org/D61151

llvm-svn: 363422

2019-06-14 16:56:49 +00:00

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