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

test/ExecutionEngine/2007-05-12-APInt-Shl.ll

@@ -1,30 +0,0 @@
-; RUN: llvm-as %s -f -o %t.bc
-; RUN: lli -force-interpreter=true %t.bc | tee %t.out | grep 10
-
-; Test that APInt shift left works when bitwidth > 64 and shiftamt == 0
-
-declare i32 @putchar(i32)
-
-define void @putBit(i65 %x, i65 %bitnum) {
-  %tmp1 = shl i65 1, %bitnum
-  %tmp2 = and i65 %x, %tmp1
-  %cond = icmp ne i65 %tmp2, 0
-  br i1 %cond, label %cond_true, label %cond_false
-
-cond_true:
-  call i32 @putchar(i32 49)
-  br label %cond_next
-
-cond_false:
-  call i32 @putchar(i32 48)
-  br label %cond_next
-
-cond_next:
-  ret void
-}
-
-define i32 @main() {
-  call void @putBit(i65 1, i65 0)
-  call void @putBit(i65 0, i65 0)
-  ret i32 0
-}

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);
+}
+
+}