Add Polly to release notes

llvm-svn: 144528

llvm/docs/ReleaseNotes.html

@@ -508,6 +508,22 @@ be used to verify some algorithms.
 
 </div>
 
+<!--=========================================================================-->
+<h3>Polly</h3>
+
+<div>
+
+<p><a href="http://polly.grosser.es">Polly</a> is an advanced data-locality
+   optimizer and automatic parallelizer. It uses an advanced, mathematical
+   model to calculate detailed data dependency information which it uses to
+   optimize the loop structure of a program. Polly can speed up sequential code
+   by improving memory locality and consequently the cache use. Furthermore,
+   Polly is able to expose different kind of parallelism which it exploits by
+   introducing (basic) OpenMP and SIMD code. A mid-term goal of Polly is to
+   automatically create optimized GPU code.</p>
+
+</div>
+
 <!--=========================================================================-->
 <h3>Portable OpenCL (pocl)</h3>