diff --git a/llvm/lib/Transforms/Scalar/LoopFuse.cpp b/llvm/lib/Transforms/Scalar/LoopFuse.cpp
--- a/llvm/lib/Transforms/Scalar/LoopFuse.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopFuse.cpp
@@ -2091,7 +2091,6 @@
   // LoopSimplify pass as a dependency.
   bool Changed = false;
   for (auto &L : LI) {
-    if (!L->isLoopSimplifyForm())
       Changed |= simplifyLoop(L, &DT, &LI, &SE, &AC, nullptr,
                               false /* PreserveLCSSA */);
   }