Port this test from dejagnu to unit testing.

The way this worked before was to test APInt by running
"lli -force-interpreter=true" knowing the lli uses APInt under the hood to
store its values. Now, we test APInt directly.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62514 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 25 insertions, 0 deletions

diff --git a/unittests/ADT/APInt.cpp b/unittests/ADT/APInt.cpp
new file mode 100644
index 0000000000..5bca5b6b40
--- /dev/null
+++ b/unittests/ADT/APInt.cpp
@@ -0,0 +1,25 @@
+//===- llvm/unittest/ADT/APInt.cpp - APInt unit tests -----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "gtest/gtest.h"
+#include "llvm/ADT/APInt.h"
+
+using namespace llvm;
+
+namespace {
+
+// Test that APInt shift left works when bitwidth > 64 and shiftamt == 0
+TEST(APIntTest, ShiftLeftByZero) {
+  APInt One = APInt::getNullValue(65) + 1;
+  APInt Shl = One.shl(0);
+  EXPECT_EQ(Shl[0], true);
+  EXPECT_EQ(Shl[1], false);
+}
+
+}