diff --git a/src/mapleall/maple_be/src/cg/loop.cpp b/src/mapleall/maple_be/src/cg/loop.cpp
index 466b3475cca80f8e221fb5ebc627daf64daec8c9..9f0dba7a34da7e9d7fd227d649e9992ad4b1829e 100644
--- a/src/mapleall/maple_be/src/cg/loop.cpp
+++ b/src/mapleall/maple_be/src/cg/loop.cpp
@@ -640,6 +640,7 @@ void LoopFinder::FormLoopHierarchy() {
   UpdateCGFunc();
 }
 
+#ifdef needSplitCriticalEdges
 void LoopFinder::SplitCriticalEdges() {
   for (auto it = criticalEdges.begin(); it != criticalEdges.end(); ++it) {
     cgFunc->GetTheCFG()->BreakCriticalEdge(*((*it).first), *((*it).second));
@@ -665,15 +666,18 @@ void LoopFinder::CollectCriticalEdges() {
     }
   }
 }
+#endif
 
 bool CgLoopAnalysis::PhaseRun(maplebe::CGFunc &f) {
   f.ClearLoopInfo();
   MemPool *loopMemPool = GetPhaseMemPool();
   LoopFinder *loopFinder = loopMemPool->New<LoopFinder>(f, *loopMemPool);
+#ifdef needSplitCriticalEdges
   if (f.GetMirModule().IsCModule() && f.NumBBs() < kBBLimit) {
     loopFinder->CollectCriticalEdges();
     loopFinder->SplitCriticalEdges();
   }
+#endif
   loopFinder->FormLoopHierarchy();
 
   if (LOOP_ANALYSIS_DUMP_NEWPM) {