[PATCH] D26991: Hoist redundant load

[Marshall Clow via Phabricator via cfe-commits]

mclow.lists added a comment.

/me wonders what the perf difference when `_LIBCPP_UNROLL_LOOPS` is defined or  not.

I think this (`_LIBCPP_UNROLL_LOOPS`) falls squarely into Chandler's request that we complain to him when the compiler generates sub-optimal code, instead of doing things like manually unrolling loops.


https://reviews.llvm.org/D26991