diff options
Diffstat (limited to 'lib/Transforms/Scalar/LoopRotation.cpp')
-rw-r--r-- | lib/Transforms/Scalar/LoopRotation.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/LoopRotation.cpp b/lib/Transforms/Scalar/LoopRotation.cpp index fde6bacb49..f0c9d5229b 100644 --- a/lib/Transforms/Scalar/LoopRotation.cpp +++ b/lib/Transforms/Scalar/LoopRotation.cpp @@ -82,6 +82,9 @@ bool LoopRotate::runOnLoop(Loop *L, LPPassManager &LPM) { if (skipOptnoneFunction(L)) return false; + // Save the loop metadata. + MDNode *LoopMD = L->getLoopID(); + LI = &getAnalysis<LoopInfo>(); TTI = &getAnalysis<TargetTransformInfo>(); @@ -96,6 +99,12 @@ bool LoopRotate::runOnLoop(Loop *L, LPPassManager &LPM) { MadeChange = true; SimplifiedLatch = false; } + + // Restore the loop metadata. + // NB! We presume LoopRotation DOESN'T ADD its own metadata. + if ((MadeChange || SimplifiedLatch) && LoopMD) + L->setLoopID(LoopMD); + return MadeChange; } |