diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -805,11 +805,7 @@
 
 get_source_info(${CMAKE_CURRENT_SOURCE_DIR} revision repository)
 string(LENGTH "${revision}" revision_length)
-if(revision MATCHES "^[0-9]+$" AND revision_length LESS 40)
-  set(LLVM_RPM_SPEC_REVISION "r${revision}")
-else()
-  set(LLVM_RPM_SPEC_REVISION "${revision}")
-endif()
+set(LLVM_RPM_SPEC_REVISION "${revision}")
 
 configure_file(
   ${LLVM_SRPM_USER_BINARY_SPECFILE}
diff --git a/llvm/cmake/modules/VersionFromVCS.cmake b/llvm/cmake/modules/VersionFromVCS.cmake
--- a/llvm/cmake/modules/VersionFromVCS.cmake
+++ b/llvm/cmake/modules/VersionFromVCS.cmake
@@ -3,26 +3,6 @@
 # existence of certain subdirectories under SOURCE_DIR (if provided as an
 # extra argument, otherwise uses CMAKE_CURRENT_SOURCE_DIR).
 
-function(get_source_info_svn path revision repository)
-  # If svn is a bat file, find_program(Subversion) doesn't find it.
-  # Explicitly search for that here; Subversion_SVN_EXECUTABLE will override
-  # the find_program call in FindSubversion.cmake.
-  find_program(Subversion_SVN_EXECUTABLE NAMES svn svn.bat)
-  find_package(Subversion)
-
-  # Subversion module does not work with symlinks, see PR8437.
-  get_filename_component(realpath ${path} REALPATH)
-  if(Subversion_FOUND)
-    subversion_wc_info(${realpath} Project)
-    if(Project_WC_REVISION)
-      set(${revision} ${Project_WC_REVISION} PARENT_SCOPE)
-    endif()
-    if(Project_WC_URL)
-      set(${repository} ${Project_WC_URL} PARENT_SCOPE)
-    endif()
-  endif()
-endfunction()
-
 function(get_source_info_git path revision repository)
   find_package(Git)
   if(GIT_FOUND)
@@ -34,61 +14,42 @@
     if(git_result EQUAL 0)
       string(STRIP "${git_output}" git_output)
       get_filename_component(git_dir ${git_output} ABSOLUTE BASE_DIR ${path})
-      if(EXISTS "${git_dir}/svn/refs")
-        execute_process(COMMAND ${GIT_EXECUTABLE} svn info
-          WORKING_DIRECTORY ${path}
-          RESULT_VARIABLE git_result
-          OUTPUT_VARIABLE git_output)
-        if(git_result EQUAL 0)
-          string(REGEX REPLACE "^(.*\n)?Revision: ([^\n]+).*"
-            "\\2" git_svn_rev "${git_output}")
-          set(${revision} ${git_svn_rev} PARENT_SCOPE)
-          string(REGEX REPLACE "^(.*\n)?URL: ([^\n]+).*"
-            "\\2" git_url "${git_output}")
-          set(${repository} ${git_url} PARENT_SCOPE)
-        endif()
+      execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse HEAD
+        WORKING_DIRECTORY ${path}
+        RESULT_VARIABLE git_result
+        OUTPUT_VARIABLE git_output)
+      if(git_result EQUAL 0)
+        string(STRIP "${git_output}" git_output)
+        set(${revision} ${git_output} PARENT_SCOPE)
+      endif()
+      execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse --abbrev-ref --symbolic-full-name @{upstream}
+        WORKING_DIRECTORY ${path}
+        RESULT_VARIABLE git_result
+        OUTPUT_VARIABLE git_output
+        ERROR_QUIET)
+      if(git_result EQUAL 0)
+        string(REPLACE "/" ";" branch ${git_output})
+        list(GET branch 0 remote)
       else()
-        execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse HEAD
-          WORKING_DIRECTORY ${path}
-          RESULT_VARIABLE git_result
-          OUTPUT_VARIABLE git_output)
-        if(git_result EQUAL 0)
-          string(STRIP "${git_output}" git_output)
-          set(${revision} ${git_output} PARENT_SCOPE)
-        endif()
-        execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse --abbrev-ref --symbolic-full-name @{upstream}
-          WORKING_DIRECTORY ${path}
-          RESULT_VARIABLE git_result
-          OUTPUT_VARIABLE git_output
-          ERROR_QUIET)
-        if(git_result EQUAL 0)
-          string(REPLACE "/" ";" branch ${git_output})
-          list(GET branch 0 remote)
-        else()
-          set(remote "origin")
-        endif()
-        execute_process(COMMAND ${GIT_EXECUTABLE} remote get-url ${remote}
-          WORKING_DIRECTORY ${path}
-          RESULT_VARIABLE git_result
-          OUTPUT_VARIABLE git_output
-          ERROR_QUIET)
-        if(git_result EQUAL 0)
-          string(STRIP "${git_output}" git_output)
-          set(${repository} ${git_output} PARENT_SCOPE)
-        else()
-          set(${repository} ${path} PARENT_SCOPE)
-        endif()
+        set(remote "origin")
+      endif()
+      execute_process(COMMAND ${GIT_EXECUTABLE} remote get-url ${remote}
+        WORKING_DIRECTORY ${path}
+        RESULT_VARIABLE git_result
+        OUTPUT_VARIABLE git_output
+        ERROR_QUIET)
+      if(git_result EQUAL 0)
+        string(STRIP "${git_output}" git_output)
+        set(${repository} ${git_output} PARENT_SCOPE)
+      else()
+        set(${repository} ${path} PARENT_SCOPE)
       endif()
     endif()
   endif()
 endfunction()
 
 function(get_source_info path revision repository)
-  if(EXISTS "${path}/.svn")
-    get_source_info_svn("${path}" revision_info repository_info)
-  else()
-    get_source_info_git("${path}" revision_info repository_info)
-  endif()
+  get_source_info_git("${path}" revision_info repository_info)
   set(${repository} "${repository_info}" PARENT_SCOPE)
   set(${revision} "${revision_info}" PARENT_SCOPE)
 endfunction()