[llvm] [ADT] BitVector: give `subsetOf(RHS)` name to `!test(RHS)` (NFC) (PR #170875)

[Jakub Kuderski via llvm-commits]

================
@@ -835,26 +836,118 @@ TYPED_TEST(BitVectorTest, BinOps) {
   A.resize(65);
   EXPECT_FALSE(A.anyCommon(B));
   EXPECT_FALSE(B.anyCommon(B));
+  EXPECT_TRUE(A.subsetOf(B));
+  EXPECT_TRUE(B.subsetOf(A));
 
   B.resize(64);
   A.set(64);
   EXPECT_FALSE(A.anyCommon(B));
   EXPECT_FALSE(B.anyCommon(A));
+  EXPECT_FALSE(A.subsetOf(B));
+  EXPECT_TRUE(B.subsetOf(A));
 
   B.set(63);
   EXPECT_FALSE(A.anyCommon(B));
   EXPECT_FALSE(B.anyCommon(A));
+  EXPECT_FALSE(A.subsetOf(B));
+  EXPECT_FALSE(B.subsetOf(A));
 
   A.set(63);
   EXPECT_TRUE(A.anyCommon(B));
   EXPECT_TRUE(B.anyCommon(A));
+  EXPECT_FALSE(A.subsetOf(B));
+  EXPECT_TRUE(B.subsetOf(A));
 
   B.resize(70);
   B.set(64);
   B.reset(63);
   A.resize(64);
   EXPECT_FALSE(A.anyCommon(B));
   EXPECT_FALSE(B.anyCommon(A));
+  EXPECT_FALSE(A.subsetOf(B));
+  EXPECT_FALSE(B.subsetOf(A));
+
+  B.set(63);
+  B.reset(64);
+  EXPECT_TRUE(A.anyCommon(B));
+  EXPECT_TRUE(B.anyCommon(A));
+  EXPECT_TRUE(A.subsetOf(B));
+  EXPECT_TRUE(B.subsetOf(A));
+}
+
+template <typename VecType>
+static inline VecType
+createBitVectorFromBits(uint32_t Size, std::initializer_list<int> SetBits) {
+  VecType V;
+  V.resize(Size);
+  for (int BitIndex : SetBits)
+    V.set(BitIndex);
+  return V;
+}
+
+TYPED_TEST(BitVectorTest, BinOpsLiteral) {
+  // More tests of binary operations with more focus on the semantics and
+  // less focus on mutability.
+
+  auto AnyCommon = [](uint32_t SizeLHS, std::initializer_list<int> SetBitsLHS,
+                      uint32_t SizeRHS, std::initializer_list<int> SetBitsRHS) {
+    auto LHS = createBitVectorFromBits<TypeParam>(SizeLHS, SetBitsLHS);
+    auto RHS = createBitVectorFromBits<TypeParam>(SizeRHS, SetBitsRHS);
+    return LHS.anyCommon(RHS);
+  };
+  auto SubsetOf = [](uint32_t SizeLHS, std::initializer_list<int> SetBitsLHS,
+                     uint32_t SizeRHS, std::initializer_list<int> SetBitsRHS) {
+    auto LHS = createBitVectorFromBits<TypeParam>(SizeLHS, SetBitsLHS);
+    auto RHS = createBitVectorFromBits<TypeParam>(SizeRHS, SetBitsRHS);
+    return LHS.subsetOf(RHS);
+  };
+
+  // clang-format off
+
+  // Test small-sized vectors.
+
+  EXPECT_TRUE (AnyCommon(10, {1, 2, 3}, 10, {3, 4, 5}));
----------------
kuhar wrote:

```suggestion
  // Test small-sized vectors.
  EXPECT_TRUE (AnyCommon(10, {1, 2, 3}, 10, {3, 4, 5}));
```

https://github.com/llvm/llvm-project/pull/170875