Give APInt move semantics.

The interaction between defaulted operators and move elision isn't
totally obvious, add a unit test so it doesn't break unintentionally.

llvm-svn: 202662

2 files changed, 45 insertions, 0 deletions

diff --git a/llvm/unittests/ADT/APSIntTest.cpp b/llvm/unittests/ADT/APSIntTest.cpp
new file mode 100644
index 00000000000..eef9c8a90af
--- /dev/null
+++ b/llvm/unittests/ADT/APSIntTest.cpp
@@ -0,0 +1,44 @@
+//===- llvm/unittest/ADT/APSIntTest.cpp - APSInt unit tests ---------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/APSInt.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+
+namespace {
+
+TEST(APSIntTest, MoveTest) {
+  APSInt A(32, true);
+  EXPECT_TRUE(A.isUnsigned());
+
+  APSInt B(128, false);
+  A = B;
+  EXPECT_FALSE(A.isUnsigned());
+
+  APSInt C(B);
+  EXPECT_FALSE(C.isUnsigned());
+
+  APInt Wide(256, 0);
+  const uint64_t *Bits = Wide.getRawData();
+  APSInt D(std::move(Wide));
+  EXPECT_TRUE(D.isUnsigned());
+  EXPECT_EQ(Bits, D.getRawData()); // Verify that "Wide" was really moved.
+
+  A = APSInt(64, true);
+  EXPECT_TRUE(A.isUnsigned());
+
+  Wide = APInt(128, 1);
+  Bits = Wide.getRawData();
+  A = std::move(Wide);
+  EXPECT_TRUE(A.isUnsigned());
+  EXPECT_EQ(Bits, A.getRawData()); // Verify that "Wide" was really moved.
+}
+
+}
diff --git a/llvm/unittests/ADT/CMakeLists.txt b/llvm/unittests/ADT/CMakeLists.txt
index b7d006ac66d..f26ac02feb2 100644
--- a/llvm/unittests/ADT/CMakeLists.txt
+++ b/llvm/unittests/ADT/CMakeLists.txt
@@ -5,6 +5,7 @@ set(LLVM_LINK_COMPONENTS
 set(ADTSources
   APFloatTest.cpp
   APIntTest.cpp
+  APSIntTest.cpp
   ArrayRefTest.cpp
   BitVectorTest.cpp
   DAGDeltaAlgorithmTest.cpp