[PATCH] D114894: [unroll] Fix a functional change in an NFC patch

Daniel Sanders via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Wed Dec 1 11:19:31 PST 2021


dsanders created this revision.
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5c77aa2b917c <https://reviews.llvm.org/rG5c77aa2b917c5b21b3f9c6d355ca2f9a0a81b95d> [unroll] Use early return in shouldFullUnroll [nfc]
wasn't quite NFC since !(x <= y) is x > y rather than x >= y

Credit to Justin Bogner for spotting the bug


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D114894

Files:
  llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp


Index: llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
===================================================================
--- llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
+++ llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
@@ -808,7 +808,7 @@
     const TargetTransformInfo::UnrollingPreferences &UP) {
   assert(FullUnrollTripCount && "should be non-zero!");
 
-  if (FullUnrollTripCount >= UP.FullUnrollMaxCount)
+  if (FullUnrollTripCount > UP.FullUnrollMaxCount)
     return None;
 
   // When computing the unrolled size, note that BEInsns are not replicated


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