diff --git a/llvm/lib/Demangle/RustDemangle.cpp b/llvm/lib/Demangle/RustDemangle.cpp
--- a/llvm/lib/Demangle/RustDemangle.cpp
+++ b/llvm/lib/Demangle/RustDemangle.cpp
@@ -454,6 +454,24 @@
     print(")");
     break;
   }
+  case 'R':
+    print("&");
+    // FIXME demangle [<lifetime>].
+    demangleType();
+    break;
+  case 'Q':
+    print("&mut ");
+    // FIXME demangle [<lifetime>].
+    demangleType();
+    break;
+  case 'P':
+    print("*const ");
+    demangleType();
+    break;
+  case 'O':
+    print("*mut ");
+    demangleType();
+    break;
   default:
     Position = Start;
     demanglePath(InType::Yes);
diff --git a/llvm/test/Demangle/rust.test b/llvm/test/Demangle/rust.test
--- a/llvm/test/Demangle/rust.test
+++ b/llvm/test/Demangle/rust.test
@@ -175,6 +175,18 @@
 CHECK: types::<(_, _, _)>
        _RIC5typesTpppEE
 
+CHECK: types::<&_>
+       _RIC5typesRpE
+
+CHECK: types::<&mut _>
+       _RIC5typesQpE
+
+CHECK: types::<*const _>
+       _RIC5typesPpE
+
+CHECK: types::<*mut _>
+       _RIC5typesOpE
+
 ; Integer constants. Test value demangling.
 
 CHECK: integer::<0>