BitVector: Do the right thing in all() when Size is a multiple of BITWORD_SIZE.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183525 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/ADT/BitVectorTest.cpp b/unittests/ADT/BitVectorTest.cpp
index f97be22..85e1594 100644
--- a/unittests/ADT/BitVectorTest.cpp
+++ b/unittests/ADT/BitVectorTest.cpp
@@ -149,6 +149,22 @@
   EXPECT_FALSE(Vec.none());
   EXPECT_FALSE(Vec.empty());
 
+  Vec.resize(64);
+  EXPECT_EQ(64U, Vec.count());
+  EXPECT_EQ(64U, Vec.size());
+  EXPECT_TRUE(Vec.any());
+  EXPECT_TRUE(Vec.all());
+  EXPECT_FALSE(Vec.none());
+  EXPECT_FALSE(Vec.empty());
+
+  Vec.flip();
+  EXPECT_EQ(0U, Vec.count());
+  EXPECT_EQ(64U, Vec.size());
+  EXPECT_FALSE(Vec.any());
+  EXPECT_FALSE(Vec.all());
+  EXPECT_TRUE(Vec.none());
+  EXPECT_FALSE(Vec.empty());
+
   Inv = TypeParam().flip();
   EXPECT_EQ(0U, Inv.count());
   EXPECT_EQ(0U, Inv.size());