added a test case

llvm/unittests/IR/CMakeLists.txt

add_llvm_unittest(IRTests
   UserTest.cpp
   ValueHandleTest.cpp
   ValueMapTest.cpp
   ValueTest.cpp
   VectorBuilderTest.cpp
   VectorTypesTest.cpp
   VerifierTest.cpp
   VPIntrinsicTest.cpp
+  CoreBindings.cpp
   )
 
 target_link_libraries(IRTests PRIVATE LLVMTestingSupport)

llvm/unittests/IR/CoreBindings.cpp

+//===- llvm/unittest/IR/CoreBindings.cpp - Tests for C-API bindings -------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm-c/Core.h"
+#include "llvm/Config/llvm-config.h"
+#include "gtest/gtest.h"
+
+namespace {
+
+TEST(CoreBindings, VersionTest) {
+
+  // Test ability to ignore output parameters
+  LLVMGetVersion(nullptr, nullptr, nullptr);
+
+  unsigned major, minor, patch;
+  LLVMGetVersion(&major, &minor, &patch);
+  EXPECT_EQ(major, (unsigned)LLVM_VERSION_MAJOR);
+  EXPECT_EQ(minor, (unsigned)LLVM_VERSION_MINOR);
+  EXPECT_EQ(patch, (unsigned)LLVM_VERSION_PATCH);
+}
+
+} // end anonymous namespace