diff --git a/llvm/lib/Passes/PassBuilder.cpp b/llvm/lib/Passes/PassBuilder.cpp
--- a/llvm/lib/Passes/PassBuilder.cpp
+++ b/llvm/lib/Passes/PassBuilder.cpp
@@ -301,6 +301,7 @@
 extern cl::opt<bool> EnableIROutliner;
 extern cl::opt<bool> EnableOrderFileInstrumentation;
 extern cl::opt<bool> EnableCHR;
+extern cl::opt<bool> EnableLoopInterchange;
 extern cl::opt<bool> EnableUnrollAndJam;
 extern cl::opt<bool> EnableLoopFlatten;
 extern cl::opt<bool> RunNewGVN;
@@ -748,6 +749,10 @@
     C(LPM2, Level);
 
   LPM2.addPass(LoopDeletionPass());
+
+  if (EnableLoopInterchange)
+    LPM2.addPass(LoopInterchangePass());
+
   // Do not enable unrolling in PreLinkThinLTO phase during sample PGO
   // because it changes IR to makes profile annotation in back compile
   // inaccurate. The normal unroller doesn't pay attention to forced full unroll
diff --git a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
--- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
+++ b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
@@ -84,7 +84,7 @@
                         clEnumValN(::CFLAAType::Both, "both",
                                    "Enable both variants of CFL-AA")));
 
-static cl::opt<bool> EnableLoopInterchange(
+cl::opt<bool> EnableLoopInterchange(
     "enable-loopinterchange", cl::init(false), cl::Hidden,
     cl::desc("Enable the new, experimental LoopInterchange Pass"));