Update 3.7 Release Note mentionning the non-optionality of the DataLayout
From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 232677
diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
index c977ebb..c0d2ea1 100644
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -44,10 +44,14 @@
* The minimum required Visual Studio version for building LLVM is now 2013
Update 4.
-* A new documentation page, :doc:`Frontend/PerformanceTips`, contains a
- collection of tips for frontend authors on how to generate IR which LLVM is
+* A new documentation page, :doc:`Frontend/PerformanceTips`, contains a
+ collection of tips for frontend authors on how to generate IR which LLVM is
able to effectively optimize.
+* The DataLayout is no longer optional. All the IR level optimizations expects
+ it to be present and the API has been changed to use a reference instead of
+ a pointer to make it explicit. The Module owns the datalayout and it has to
+ match the one attached to the TargetMachine for generating code.
* ... next change ...