[DFAJumpThreading] Mark DT as preserved in LegacyPM

It is marked as preserved in NewPM, but not LegacyPM.
llvm · Aug 2, 2021 · e97524c · e97524c
1 parent ea97066
commit e97524c
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/llvm/lib/Transforms/Scalar/DFAJumpThreading.cpp b/llvm/lib/Transforms/Scalar/DFAJumpThreading.cpp
@@ -174,6 +174,7 @@ class DFAJumpThreadingLegacyPass : public FunctionPass {
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<AssumptionCacheTracker>();
     AU.addRequired<DominatorTreeWrapperPass>();
+    AU.addPreserved<DominatorTreeWrapperPass>();
     AU.addRequired<TargetTransformInfoWrapperPass>();
     AU.addRequired<OptimizationRemarkEmitterWrapperPass>();
   }