diff --git a/tools/opt/opt.cpp b/tools/opt/opt.cpp
index 14dd158b906..fab3ce2e11b 100644
--- a/tools/opt/opt.cpp
+++ b/tools/opt/opt.cpp
@@ -212,6 +212,7 @@ void AddStandardCompilePasses(PassManager &PM) {
   addPass(PM, createTailCallEliminationPass());  // Eliminate tail calls
   addPass(PM, createCFGSimplificationPass());    // Merge & remove BBs
   addPass(PM, createReassociatePass());          // Reassociate expressions
+  addPass(PM, createLoopRotatePass());
   addPass(PM, createLICMPass());                 // Hoist loop invariants
   addPass(PM, createLoopUnswitchPass());         // Unswitch loops.
   addPass(PM, createInstructionCombiningPass()); // Clean up after LICM/reassoc