Index: llvm/cmake/modules/HandleLLVMOptions.cmake
===================================================================
--- llvm/cmake/modules/HandleLLVMOptions.cmake
+++ llvm/cmake/modules/HandleLLVMOptions.cmake
@@ -1037,18 +1037,36 @@
     CMAKE_SHARED_LINKER_FLAGS)
 endif()
 
+set(LLVM_PROFDATA_TYPE OFF CACHE STRING "The type of PGO profile used to build LLVM and tools. May be specified as IR or Frontend")
+mark_as_advanced(LLVM_PROFDATA_TYPE)
+string(TOUPPER "${LLVM_PROFDATA_TYPE}" uppercase_LLVM_PROFDATA_TYPE)
 if(LLVM_PROFDATA_FILE AND EXISTS ${LLVM_PROFDATA_FILE})
-  if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
-    append("-fprofile-instr-use=\"${LLVM_PROFDATA_FILE}\""
-      CMAKE_CXX_FLAGS
-      CMAKE_C_FLAGS)
-    if(NOT LINKER_IS_LLD_LINK)
-      append("-fprofile-instr-use=\"${LLVM_PROFDATA_FILE}\""
-        CMAKE_EXE_LINKER_FLAGS
-        CMAKE_SHARED_LINKER_FLAGS)
+  if (uppercase_LLVM_PROFDATA_TYPE STREQUAL "IR")
+    if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
+      append("-fprofile-use=\"${LLVM_PROFDATA_FILE}\""
+        CMAKE_CXX_FLAGS
+        CMAKE_C_FLAGS)
+      if(NOT LINKER_IS_LLD_LINK)
+        append("-fprofile-use=\"${LLVM_PROFDATA_FILE}\""
+          CMAKE_EXE_LINKER_FLAGS
+          CMAKE_SHARED_LINKER_FLAGS)
+      endif()
+    else()
+      message(FATAL_ERROR "LLVM_PROFDATA_FILE can only be specified when compiling with clang")
     endif()
   else()
-    message(FATAL_ERROR "LLVM_PROFDATA_FILE can only be specified when compiling with clang")
+    if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
+      append("-fprofile-instr-use=\"${LLVM_PROFDATA_FILE}\""
+        CMAKE_CXX_FLAGS
+        CMAKE_C_FLAGS)
+      if(NOT LINKER_IS_LLD_LINK)
+        append("-fprofile-instr-use=\"${LLVM_PROFDATA_FILE}\""
+          CMAKE_EXE_LINKER_FLAGS
+          CMAKE_SHARED_LINKER_FLAGS)
+      endif()
+    else()
+      message(FATAL_ERROR "LLVM_PROFDATA_FILE can only be specified when compiling with clang")
+    endif()
   endif()
 endif()