diff --git a/tools/opt/opt.cpp b/tools/opt/opt.cpp
index d1862a0..f9dd161 100644
--- a/tools/opt/opt.cpp
+++ b/tools/opt/opt.cpp
@@ -282,6 +282,7 @@
   addPass(PM, createLoopIndexSplitPass());       // Index split loops.
   addPass(PM, createInstructionCombiningPass()); // Clean up after LICM/reassoc
   addPass(PM, createIndVarSimplifyPass());       // Canonicalize indvars
+  addPass(PM, createLoopDeletionPass());         // Delete dead loops
   addPass(PM, createLoopUnrollPass());           // Unroll small loops
   addPass(PM, createInstructionCombiningPass()); // Clean up after the unroller
   addPass(PM, createGVNPass());                  // Remove redundancies