diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -155,7 +155,7 @@
                                        cl::desc("Enable memory profiler"));
 
 static cl::opt<bool> EnableModuleInliner("enable-module-inliner",
-                                         cl::init(false), cl::Hidden,
+                                         cl::init(true), cl::Hidden,
                                          cl::desc("Enable module inliner"));
 
 static cl::opt<bool> PerformMandatoryInliningsFirst(
@@ -754,9 +754,11 @@
   return MIWP;
 }
 
-ModuleInlinerPass
+ModulePassManager 
 PassBuilder::buildModuleInlinerPipeline(OptimizationLevel Level,
                                         ThinOrFullLTOPhase Phase) {
+  ModulePassManager MPM;
+
   InlineParams IP = getInlineParamsFromOptLevel(Level);
   if (Phase == ThinOrFullLTOPhase::ThinLTOPreLink && PGOOpt &&
       PGOOpt->Action == PGOOptions::SampleUse)
@@ -773,7 +775,16 @@
   // inline deferral logic in module inliner.
   IP.EnableDeferral = false;
 
-  return ModuleInlinerPass(IP, UseInlineAdvisor);
+  MPM.addPass(ModuleInlinerPass(IP, UseInlineAdvisor));
+
+  MPM.addPass(createModuleToFunctionPassAdaptor(
+      buildFunctionSimplificationPipeline(Level, Phase),
+      PTO.EagerlyInvalidateAnalyses));
+
+  MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(
+    CoroSplitPass(Level != OptimizationLevel::O0)));
+
+  return MPM;
 }
 
 ModulePassManager