Index: llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
===================================================================
--- llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
+++ llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
@@ -772,14 +772,12 @@
   if (!BO->hasNoUnsignedWrap() &&
       willNotOverflow(SE, BO->getOpcode(), /* Signed */ false, LHS, RHS)) {
     BO->setHasNoUnsignedWrap();
-    SE->forgetValue(BO);
     Changed = true;
   }
 
   if (!BO->hasNoSignedWrap() &&
       willNotOverflow(SE, BO->getOpcode(), /* Signed */ true, LHS, RHS)) {
     BO->setHasNoSignedWrap();
-    SE->forgetValue(BO);
     Changed = true;
   }