1 files changed, 58 insertions, 0 deletions
diff --git a/gnu/llvm/unittests/Transforms/Utils/ValueMapperTest.cpp b/gnu/llvm/unittests/Transforms/Utils/ValueMapperTest.cpp
new file mode 100644
index 00000000000..9dbe4dbc56d
--- /dev/null
+++ b/gnu/llvm/unittests/Transforms/Utils/ValueMapperTest.cpp
@@ -0,0 +1,58 @@
+//===- ValueMapper.cpp - Unit tests for ValueMapper -----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Metadata.h"
+#include "llvm/Transforms/Utils/ValueMapper.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+
+namespace {
+
+TEST(ValueMapperTest, MapMetadataUnresolved) {
+  LLVMContext Context;
+  TempMDTuple T = MDTuple::getTemporary(Context, None);
+
+  ValueToValueMapTy VM;
+  EXPECT_EQ(T.get(), MapMetadata(T.get(), VM, RF_NoModuleLevelChanges));
+}
+
+TEST(ValueMapperTest, MapMetadataDistinct) {
+  LLVMContext Context;
+  auto *D = MDTuple::getDistinct(Context, None);
+
+  {
+    // The node should be cloned.
+    ValueToValueMapTy VM;
+    EXPECT_NE(D, MapMetadata(D, VM, RF_None));
+  }
+  {
+    // The node should be moved.
+    ValueToValueMapTy VM;
+    EXPECT_EQ(D, MapMetadata(D, VM, RF_MoveDistinctMDs));
+  }
+}
+
+TEST(ValueMapperTest, MapMetadataDistinctOperands) {
+  LLVMContext Context;
+  Metadata *Old = MDTuple::getDistinct(Context, None);
+  auto *D = MDTuple::getDistinct(Context, Old);
+  ASSERT_EQ(Old, D->getOperand(0));
+
+  Metadata *New = MDTuple::getDistinct(Context, None);
+  ValueToValueMapTy VM;
+  VM.MD()[Old].reset(New);
+
+  // Make sure operands are updated.
+  EXPECT_EQ(D, MapMetadata(D, VM, RF_MoveDistinctMDs));
+  EXPECT_EQ(New, D->getOperand(0));
+}
+
+}