[PATCH] D19827: Do not disable completely loop unroll when optimizing for size.

[Reid Kleckner via cfe-commits]

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lgtm

To be clear, loop unrolling just lowers its size threshold when -Os is on:

  // Apply size attributes
  if (L->getHeader()->getParent()->optForSize()) {
    UP.Threshold = UP.OptSizeThreshold;
    UP.PartialThreshold = UP.PartialOptSizeThreshold;
  }

So this does more than enabling loop unrolling when pragmas are present. However, it that behavior is wrong then we should fix it in LLVM.


Repository:
  rL LLVM

http://reviews.llvm.org/D19827