diff options
Diffstat (limited to 'lib/Transforms/Scalar/LoopRotation.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/LoopRotation.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/LoopRotation.cpp b/lib/Transforms/Scalar/LoopRotation.cpp index 34ba48c6b0..70c69bb1da 100644 --- a/lib/Transforms/Scalar/LoopRotation.cpp +++ b/lib/Transforms/Scalar/LoopRotation.cpp @@ -177,6 +177,11 @@ bool LoopRotate::rotateLoop(Loop *Lp, LPPassManager &LPM) { // Now, this loop is suitable for rotation. + // Anything ScalarEvolution may know about this loop or the PHI nodes + // in its header will soon be invalidated. + if (ScalarEvolution *SE = getAnalysisIfAvailable<ScalarEvolution>()) + SE->forgetLoopBackedgeTakenCount(L); + // Find new Loop header. NewHeader is a Header's one and only successor // that is inside loop. Header's other successor is outside the // loop. Otherwise loop is not suitable for rotation. |