When optimizing for size, enable loop rerolling by default

Description

When optimizing for size, enable loop rerolling by default

We have a loop-rerolling optimization which can be enabled by using
-freroll-loops. While sometimes loops are hand-unrolled for performance
reasons, when optimizing for size, we should always undo this manual
optimization to produce smaller code (our optimizer's unroller will still
unroll the rerolled loops if it thinks that is a good idea).

Details

Committed
hfinkelOct 8 2016, 8:06 PM
Parents
rL283684: [CMake] Fix in-tree libcxxabi build support after r283659
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