[orc] Add a trivial unit test to get the ball rolling

I made my best guess at the Makefile, since I don't have a make build.

I'm not sure if it should be valid to add an empty list of things, but
it seemed the sort of degenerate case.

llvm-svn: 230196

1 files changed, 30 insertions, 0 deletions

diff --git a/llvm/unittests/ExecutionEngine/Orc/LazyEmittingLayerTest.cpp b/llvm/unittests/ExecutionEngine/Orc/LazyEmittingLayerTest.cpp
new file mode 100644
index 00000000000..b0ff1276c5c
--- /dev/null
+++ b/llvm/unittests/ExecutionEngine/Orc/LazyEmittingLayerTest.cpp
@@ -0,0 +1,30 @@
+//===- LazyEmittingLayerTest.cpp - Unit tests for the lazy emitting layer -===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ExecutionEngine/Orc/LazyEmittingLayer.h"
+#include "gtest/gtest.h"
+
+namespace {
+
+struct MockBaseLayer {
+  typedef int ModuleSetHandleT;
+  ModuleSetHandleT addModuleSet(std::list<std::unique_ptr<llvm::Module>>,
+                                std::unique_ptr<llvm::RTDyldMemoryManager> x) {
+    EXPECT_FALSE(x);
+    return 42;
+  }
+};
+
+TEST(LazyEmittingLayerTest, Empty) {
+  MockBaseLayer M;
+  llvm::orc::LazyEmittingLayer<MockBaseLayer> L(M);
+  L.addModuleSet(std::list<std::unique_ptr<llvm::Module>>(), nullptr);
+}
+
+}