Index: llvm/utils/benchmark/cmake/GetGitVersion.cmake
===================================================================
--- llvm/utils/benchmark/cmake/GetGitVersion.cmake
+++ llvm/utils/benchmark/cmake/GetGitVersion.cmake
@@ -30,21 +30,22 @@
       else()
           string(STRIP ${GIT_VERSION} GIT_VERSION)
           string(REGEX REPLACE "-[0-9]+-g" "-" GIT_VERSION ${GIT_VERSION})
-      endif()
 
-      # Work out if the repository is dirty
-      execute_process(COMMAND ${GIT_EXECUTABLE} update-index -q --refresh
-          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-          OUTPUT_QUIET
-          ERROR_QUIET)
-      execute_process(COMMAND ${GIT_EXECUTABLE} diff-index --name-only HEAD --
-          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-          OUTPUT_VARIABLE GIT_DIFF_INDEX
-          ERROR_QUIET)
-      string(COMPARE NOTEQUAL "${GIT_DIFF_INDEX}" "" GIT_DIRTY)
-      if (${GIT_DIRTY})
-          set(GIT_VERSION "${GIT_VERSION}-dirty")
+          # Work out if the repository is dirty
+          execute_process(COMMAND ${GIT_EXECUTABLE} update-index -q --refresh
+              WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+              OUTPUT_QUIET
+              ERROR_QUIET)
+          execute_process(COMMAND ${GIT_EXECUTABLE} diff-index --name-only HEAD --
+              WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+              OUTPUT_VARIABLE GIT_DIFF_INDEX
+              ERROR_QUIET)
+          string(COMPARE NOTEQUAL "${GIT_DIFF_INDEX}" "" GIT_DIRTY)
+          if (${GIT_DIRTY})
+              set(GIT_VERSION "${GIT_VERSION}-dirty")
+          endif()
       endif()
+
   else()
       set(GIT_VERSION "v0.0.0")
   endif()