Add MLIR in the list of subprojects on the main llvm.org website

index.html

@@ -79,6 +79,13 @@
     <a href="http://clang.llvm.org/docs/DataFlowSanitizer.html">DataFlowSanitizer</a>.
     </p></li>
 
+<li><p>The <b><a href="http://mlir.llvm.org">MLIR</a></b> subproject is a novel
+    approach to building reusable and extensible compiler infrastructure. MLIR
+    aims to address software fragmentation, improve compilation for heterogeneous
+    hardware, significantly reduce the cost of building domain specific compilers,
+    and aid in connecting existing compilers together.
+    </p></li>
+
 <li><p>The <b><a href="http://openmp.llvm.org">OpenMP</a></b> subproject
     provides an <a href="http://openmp.org">OpenMP</a> runtime for use with the
     OpenMP implementation in Clang.</p></li>