Add test for PR 8111. By Frits van Bommel.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119870 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/ADT/FoldingSet.cpp

@@ -0,0 +1,39 @@
+//===- llvm/unittest/ADT/FoldingSetTest.cpp -------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// FoldingSet unit tests.
+//
+//===----------------------------------------------------------------------===//
+
+#include "gtest/gtest.h"
+#include "llvm/ADT/FoldingSet.h"
+#include <string>
+
+using namespace llvm;
+
+namespace {
+
+// Unaligned string test.
+TEST(FoldingSetTest, UnalignedStringTest) {
+  SCOPED_TRACE("UnalignedStringTest");
+
+  FoldingSetNodeID a, b;
+  // An aligned string
+  std::string str1= "a test string";
+  a.AddString(str1);
+
+  // An unaligned string
+  std::string str2 = ">" + str1;
+  b.AddString(str2.c_str() + 1);
+
+  EXPECT_EQ(a.ComputeHash(), b.ComputeHash());
+}
+
+}
+

unittests/CMakeLists.txt

@@ -43,6 +43,7 @@ add_llvm_unittest(ADT
   ADT/DeltaAlgorithmTest.cpp
   ADT/DenseMapTest.cpp
   ADT/DenseSetTest.cpp
+  ADT/FoldingSet.cpp
   ADT/ilistTest.cpp
   ADT/ImmutableSetTest.cpp
   ADT/IntervalMapTest.cpp