Revert "[Support] Replace HashString with djbHash."

It looks like some of our tests depend on the ordering of hashed values.
I'm reverting my changes while I try to reproduce and fix this locally.

Failing builds:

  lab.llvm.org:8011/builders/lld-x86_64-darwin13/builds/18388
  lab.llvm.org:8011/builders/clang-cmake-x86_64-sde-avx512-linux/builds/6743
  lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast/builds/15607

llvm-svn: 326082

1 files changed, 3 insertions, 3 deletions

diff --git a/clang/lib/Frontend/CacheTokens.cpp b/clang/lib/Frontend/CacheTokens.cpp
index f3569edc695..851ea25e9b1 100644
--- a/clang/lib/Frontend/CacheTokens.cpp
+++ b/clang/lib/Frontend/CacheTokens.cpp
@@ -21,8 +21,8 @@
 #include "clang/Lex/Lexer.h"
 #include "clang/Lex/PTHManager.h"
 #include "clang/Lex/Preprocessor.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringMap.h"
-#include "llvm/Support/DJB.h"
 #include "llvm/Support/EndianStream.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/MemoryBuffer.h"
@@ -128,7 +128,7 @@ public:
   typedef unsigned offset_type;
 
   static hash_value_type ComputeHash(PTHEntryKeyVariant V) {
-    return llvm::djbHash(V.getString());
+    return llvm::HashString(V.getString());
   }
 
   static std::pair<unsigned,unsigned>
@@ -625,7 +625,7 @@ public:
   typedef unsigned offset_type;
 
   static hash_value_type ComputeHash(PTHIdKey* key) {
-    return llvm::djbHash(key->II->getName());
+    return llvm::HashString(key->II->getName());
   }
 
   static std::pair<unsigned,unsigned>