Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/Analysis/IteratedDominanceFrontier.h b/linux-x64/clang/include/llvm/Analysis/IteratedDominanceFrontier.h
index edaf4e9..6b19507 100644
--- a/linux-x64/clang/include/llvm/Analysis/IteratedDominanceFrontier.h
+++ b/linux-x64/clang/include/llvm/Analysis/IteratedDominanceFrontier.h
@@ -7,7 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-/// \brief Compute iterated dominance frontiers using a linear time algorithm.
+/// Compute iterated dominance frontiers using a linear time algorithm.
 ///
 /// The algorithm used here is based on:
 ///
@@ -32,7 +32,7 @@
 
 namespace llvm {
 
-/// \brief Determine the iterated dominance frontier, given a set of defining
+/// Determine the iterated dominance frontier, given a set of defining
 /// blocks, and optionally, a set of live-in blocks.
 ///
 /// In turn, the results can be used to place phi nodes.
@@ -48,7 +48,7 @@
   IDFCalculator(DominatorTreeBase<BasicBlock, IsPostDom> &DT)
       : DT(DT), useLiveIn(false) {}
 
-  /// \brief Give the IDF calculator the set of blocks in which the value is
+  /// Give the IDF calculator the set of blocks in which the value is
   /// defined.  This is equivalent to the set of starting blocks it should be
   /// calculating the IDF for (though later gets pruned based on liveness).
   ///
@@ -57,7 +57,7 @@
     DefBlocks = &Blocks;
   }
 
-  /// \brief Give the IDF calculator the set of blocks in which the value is
+  /// Give the IDF calculator the set of blocks in which the value is
   /// live on entry to the block.   This is used to prune the IDF calculation to
   /// not include blocks where any phi insertion would be dead.
   ///
@@ -68,14 +68,14 @@
     useLiveIn = true;
   }
 
-  /// \brief Reset the live-in block set to be empty, and tell the IDF
+  /// Reset the live-in block set to be empty, and tell the IDF
   /// calculator to not use liveness anymore.
   void resetLiveInBlocks() {
     LiveInBlocks = nullptr;
     useLiveIn = false;
   }
 
-  /// \brief Calculate iterated dominance frontiers
+  /// Calculate iterated dominance frontiers
   ///
   /// This uses the linear-time phi algorithm based on DJ-graphs mentioned in
   /// the file-level comment.  It performs DF->IDF pruning using the live-in