Update Release notes regarding TTI.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174586 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst
index 75dcf190c90cbadca09aaa6d480c23c3f41551d7..beb20149114499e47e6844328543b79e11845c94 100644 (file)
--- a/docs/ReleaseNotes.rst
+++ b/docs/ReleaseNotes.rst
@@ -67,6 +67,13 @@ Non-comprehensive list of changes in this release
 
   We've also improved the X86 and ARM cost model.
 
+  TargetTransformInfo
+  -------------------
+  TargetTransformInto (TTI) is a new interface that can be used by IR-level passes
+  to obtain target-specific information, such as the costs of instructions. Only "Lowering"
+  passes such as LSR and the vectorizer are allowed to use the TTI infrastructure.
+
+
 * ... next change ...
 
 .. NOTE