Update prebuilt Clang to match Android kernel.

Bug: 132428451
Change-Id: I8f6e2cb23f381fc0c02ddea99b867e58e925e5be
diff --git a/linux-x64/clang/include/llvm/Analysis/LegacyDivergenceAnalysis.h b/linux-x64/clang/include/llvm/Analysis/LegacyDivergenceAnalysis.h
index 173ca28..0a338b8 100644
--- a/linux-x64/clang/include/llvm/Analysis/LegacyDivergenceAnalysis.h
+++ b/linux-x64/clang/include/llvm/Analysis/LegacyDivergenceAnalysis.h
@@ -1,9 +1,8 @@
 //===- llvm/Analysis/LegacyDivergenceAnalysis.h - KernelDivergence Analysis -*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
@@ -19,9 +18,11 @@
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/IR/Function.h"
 #include "llvm/Pass.h"
+#include "llvm/Analysis/DivergenceAnalysis.h"
 
 namespace llvm {
 class Value;
+class GPUDivergenceAnalysis;
 class LegacyDivergenceAnalysis : public FunctionPass {
 public:
   static char ID;
@@ -41,7 +42,7 @@
   //
   // Even if this function returns false, V may still be divergent when used
   // in a different basic block.
-  bool isDivergent(const Value *V) const { return DivergentValues.count(V); }
+  bool isDivergent(const Value *V) const;
 
   // Returns true if V is uniform/non-divergent.
   //
@@ -53,6 +54,12 @@
   void removeValue(const Value *V) { DivergentValues.erase(V); }
 
 private:
+  // Whether analysis should be performed by GPUDivergenceAnalysis.
+  bool shouldUseGPUDivergenceAnalysis(const Function &F) const;
+
+  // (optional) handle to new DivergenceAnalysis
+  std::unique_ptr<GPUDivergenceAnalysis> gpuDA;
+
   // Stores all divergent values.
   DenseSet<const Value *> DivergentValues;
 };