Davide Italiano 4c39758a38 [SLPVectorizer] Reintroduce std::stable_sort(properlyDominates()).
The approach was never discussed, I wasn't able to reproduce this
non-determinism, and the original author went AWOL.
After a discussion on the ML, Philip suggested to revert this.

llvm-svn: 321974
2018-01-07 22:06:24 +00:00
..
2018-01-05 14:40:04 +00:00
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