Index: llvm/include/llvm/Target/TargetMachine.h
===================================================================
--- llvm/include/llvm/Target/TargetMachine.h
+++ llvm/include/llvm/Target/TargetMachine.h
@@ -34,6 +34,7 @@
 class MCSubtargetInfo;
 class MCSymbol;
 class raw_pwrite_stream;
+class PassBuilder;
 class PassManagerBuilder;
 struct PerFunctionMIParsingState;
 class SMDiagnostic;
@@ -293,6 +294,10 @@
   /// PassManagerBuilder::addExtension.
   virtual void adjustPassManager(PassManagerBuilder &) {}
 
+  /// Allow the target to modify the pass pipeline with New Pass Manager
+  /// (similar to adjustPassManager for Legacy Pass manager).
+  virtual void registerPassBuilderCallbacks(PassBuilder &) {}
+
   /// Add passes to the specified pass manager to get the specified file
   /// emitted.  Typically this will involve several steps of code generation.
   /// This method should return true if emission of this file type is not
Index: llvm/lib/Target/Hexagon/HexagonTargetMachine.h
===================================================================
--- llvm/lib/Target/Hexagon/HexagonTargetMachine.h
+++ llvm/lib/Target/Hexagon/HexagonTargetMachine.h
@@ -37,6 +37,7 @@
   static unsigned getModuleMatchQuality(const Module &M);
 
   void adjustPassManager(PassManagerBuilder &PMB) override;
+  void registerPassBuilderCallbacks(PassBuilder &PB) override;
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
   TargetTransformInfo getTargetTransformInfo(const Function &F) override;
 
Index: llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp
===================================================================
--- llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp
+++ llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp
@@ -22,6 +22,7 @@
 #include "llvm/CodeGen/TargetPassConfig.h"
 #include "llvm/IR/LegacyPassManager.h"
 #include "llvm/IR/Module.h"
+#include "llvm/Passes/PassBuilder.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/TargetRegistry.h"
 #include "llvm/Transforms/IPO/PassManagerBuilder.h"
@@ -273,6 +274,19 @@
       });
 }
 
+void HexagonTargetMachine::registerPassBuilderCallbacks(PassBuilder &PB) {
+  PB.registerOptimizerLastEPCallback([](ModulePassManager &MPM,
+                                        PassBuilder::OptimizationLevel Level) {
+    LoopPassManager LPM(false);
+    FunctionPassManager FPM(false);
+    LPM.addPass(HexagonVectorLoopCarriedReusePass());
+    FPM.addPass(LoopSimplifyPass());
+    FPM.addPass(LCSSAPass());
+    FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM), false, false));
+    MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
+  });
+}
+
 TargetTransformInfo
 HexagonTargetMachine::getTargetTransformInfo(const Function &F) {
   return TargetTransformInfo(HexagonTTIImpl(this, F));