[PATCH] D106126: [LoopUnroll] Double thresholds instead of increasing to pragma-unroll-threshold for llvm.loop.unroll.enable

[Fangrui Song via Phabricator via llvm-commits]

MaskRay created this revision.
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Fix PR51084: `#pragma unroll` aggressively increases `UP.Threshold` from (150
for -O2 and 300 for -O3) to 16384. This is usually undesired. Just double the
thresholds.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106126

Files:
  llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
  llvm/test/Transforms/LoopUnroll/unroll-pragmas.ll

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