Add xxhash to llvm.

It will be used for fast fingerprinting in lld at least.

llvm-svn: 282493

2 files changed, 21 insertions, 0 deletions

diff --git a/llvm/unittests/Support/CMakeLists.txt b/llvm/unittests/Support/CMakeLists.txt
index b7dcc72a491..25c5dec80c1 100644
--- a/llvm/unittests/Support/CMakeLists.txt
+++ b/llvm/unittests/Support/CMakeLists.txt
@@ -52,6 +52,7 @@ add_llvm_unittest(SupportTests
   raw_ostream_test.cpp
   raw_pwrite_stream_test.cpp
   raw_sha1_ostream_test.cpp
+  xxhashTest.cpp
   )
 
 # ManagedStatic.cpp uses <pthread>.
diff --git a/llvm/unittests/Support/xxhashTest.cpp b/llvm/unittests/Support/xxhashTest.cpp
new file mode 100644
index 00000000000..6a88a2d3a5c
--- /dev/null
+++ b/llvm/unittests/Support/xxhashTest.cpp
@@ -0,0 +1,20 @@
+//===- llvm/unittest/Support/xxhashTest.cpp -------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/xxhash.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+
+TEST(xxhashTest, Basic) {
+  EXPECT_EQ(0x33bf00a859c4ba3fU, xxHash64("foo"));
+  EXPECT_EQ(0x48a37c90ad27a659U, xxHash64("bar"));
+  EXPECT_EQ(0x69196c1b3af0bff9U,
+            xxHash64("0123456789abcdefghijklmnopqrstuvwxyz"));
+}