[ScopDetection] Compute the maximal loop depth correctly

Before this change, we obtained loop depth numbers that were deeper then the
actual loop depth.

llvm-svn: 295430

1 files changed, 1 insertions, 1 deletions

diff --git a/polly/lib/Analysis/ScopDetection.cpp b/polly/lib/Analysis/ScopDetection.cpp
index c541b59cf69..bcdbe226eee 100644
--- a/polly/lib/Analysis/ScopDetection.cpp
+++ b/polly/lib/Analysis/ScopDetection.cpp
@@ -1145,7 +1145,7 @@ ScopDetection::countBeneficialSubLoops(Loop *L, ScalarEvolution &SE,
   for (auto &SubLoop : *L) {
     LoopStats Stats = countBeneficialSubLoops(SubLoop, SE, MinProfitableTrips);
     NumLoops += Stats.NumLoops;
-    MaxLoopDepth += std::max(MaxLoopDepth, Stats.MaxDepth + 1);
+    MaxLoopDepth = std::max(MaxLoopDepth, Stats.MaxDepth + 1);
   }
 
   return {NumLoops, MaxLoopDepth};