Index: llvm/trunk/CMakeLists.txt
===================================================================
--- llvm/trunk/CMakeLists.txt
+++ llvm/trunk/CMakeLists.txt
@@ -21,10 +21,10 @@
 endif()
 
 if(NOT DEFINED LLVM_VERSION_MAJOR)
-  set(LLVM_VERSION_MAJOR 3)
+  set(LLVM_VERSION_MAJOR 4)
 endif()
 if(NOT DEFINED LLVM_VERSION_MINOR)
-  set(LLVM_VERSION_MINOR 9)
+  set(LLVM_VERSION_MINOR 0)
 endif()
 if(NOT DEFINED LLVM_VERSION_PATCH)
   set(LLVM_VERSION_PATCH 0)
Index: llvm/trunk/docs/DeveloperPolicy.rst
===================================================================
--- llvm/trunk/docs/DeveloperPolicy.rst
+++ llvm/trunk/docs/DeveloperPolicy.rst
@@ -510,8 +510,7 @@
 * Additions and changes to the IR should be reflected in
   ``test/Bitcode/compatibility.ll``.
 
-* The bitcode format produced by a X.Y release will be readable by all
-  following X.Z releases and the (X+1).0 release.
+* The current LLVM version supports loading any bitcode since version 3.0.
 
 * After each X.Y release, ``compatibility.ll`` must be copied to
   ``compatibility-X.Y.ll``. The corresponding bitcode file should be assembled
Index: llvm/trunk/docs/conf.py
===================================================================
--- llvm/trunk/docs/conf.py
+++ llvm/trunk/docs/conf.py
@@ -48,9 +48,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '3.9'
+version = '4.0'
 # The full version, including alpha/beta/rc tags.
-release = '3.9'
+release = '4.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.