[Bug middle-end/12849] testing divisibility by constant

[cassio.neri at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=12849

Cassio Neri <cassio.neri at gmail dot com> changed:

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--- Comment #4 from Cassio Neri <cassio.neri at gmail dot com> ---
A simple mathematical proof that the algorithm works is found here:

http://clomont.com/efficient-divisibility-testing/

See also https://stackoverflow.com/a/49264279/1137388.