Index: cmake/modules/HandleLLVMOptions.cmake
===================================================================
--- cmake/modules/HandleLLVMOptions.cmake
+++ cmake/modules/HandleLLVMOptions.cmake
@@ -784,6 +784,16 @@
   message(FATAL_ERROR "Exception handling requires RTTI. You must set LLVM_ENABLE_RTTI to ON")
 endif()
 
+option(LLVM_USE_NEWPM "Build LLVM using the experimental new pass manager" Off)
+mark_as_advanced(LLVM_USE_NEWPM)
+if (LLVM_USE_NEWPM)
+  append("-fexperimental-new-pass-manager"
+    CMAKE_CXX_FLAGS
+    CMAKE_C_FLAGS
+    CMAKE_EXE_LINKER_FLAGS
+    CMAKE_SHARED_LINKER_FLAGS)
+endif()
+
 option(LLVM_ENABLE_IR_PGO "Build LLVM and tools with IR PGO instrumentation (deprecated)" Off)
 mark_as_advanced(LLVM_ENABLE_IR_PGO)
 
Index: docs/CMake.rst
===================================================================
--- docs/CMake.rst
+++ docs/CMake.rst
@@ -578,6 +578,9 @@
   may not compile at all, or might fail at runtime due to known bugs in these
   toolchains.
 
+**LLVM_USE_NEWPM**:BOOL
+  If enabled, use the experimental new pass manager.
+
 CMake Caches
 ============