1 files changed, 152 insertions, 0 deletions
diff --git a/unittests/IR/MetadataTest.cpp b/unittests/IR/MetadataTest.cpp
new file mode 100644
index 0000000..352e83e
--- /dev/null
+++ b/unittests/IR/MetadataTest.cpp
@@ -0,0 +1,152 @@
+//===- llvm/unittest/IR/Metadata.cpp - Metadata unit tests ----------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/IR/Metadata.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Type.h"
+#include "llvm/Support/ValueHandle.h"
+#include "llvm/Support/raw_ostream.h"
+#include "gtest/gtest.h"
+using namespace llvm;
+
+namespace {
+
+class MetadataTest : public testing::Test {
+protected:
+  LLVMContext Context;
+};
+typedef MetadataTest MDStringTest;
+
+// Test that construction of MDString with different value produces different
+// MDString objects, even with the same string pointer and nulls in the string.
+TEST_F(MDStringTest, CreateDifferent) {
+  char x[3] = { 'f', 0, 'A' };
+  MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
+  x[2] = 'B';
+  MDString *s2 = MDString::get(Context, StringRef(&x[0], 3));
+  EXPECT_NE(s1, s2);
+}
+
+// Test that creation of MDStrings with the same string contents produces the
+// same MDString object, even with different pointers.
+TEST_F(MDStringTest, CreateSame) {
+  char x[4] = { 'a', 'b', 'c', 'X' };
+  char y[4] = { 'a', 'b', 'c', 'Y' };
+
+  MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
+  MDString *s2 = MDString::get(Context, StringRef(&y[0], 3));
+  EXPECT_EQ(s1, s2);
+}
+
+// Test that MDString prints out the string we fed it.
+TEST_F(MDStringTest, PrintingSimple) {
+  char *str = new char[13];
+  strncpy(str, "testing 1 2 3", 13);
+  MDString *s = MDString::get(Context, StringRef(str, 13));
+  strncpy(str, "aaaaaaaaaaaaa", 13);
+  delete[] str;
+
+  std::string Str;
+  raw_string_ostream oss(Str);
+  s->print(oss);
+  EXPECT_STREQ("metadata !\"testing 1 2 3\"", oss.str().c_str());
+}
+
+// Test printing of MDString with non-printable characters.
+TEST_F(MDStringTest, PrintingComplex) {
+  char str[5] = {0, '\n', '"', '\\', (char)-1};
+  MDString *s = MDString::get(Context, StringRef(str+0, 5));
+  std::string Str;
+  raw_string_ostream oss(Str);
+  s->print(oss);
+  EXPECT_STREQ("metadata !\"\\00\\0A\\22\\5C\\FF\"", oss.str().c_str());
+}
+
+typedef MetadataTest MDNodeTest;
+
+// Test the two constructors, and containing other Constants.
+TEST_F(MDNodeTest, Simple) {
+  char x[3] = { 'a', 'b', 'c' };
+  char y[3] = { '1', '2', '3' };
+
+  MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
+  MDString *s2 = MDString::get(Context, StringRef(&y[0], 3));
+  ConstantInt *CI = ConstantInt::get(getGlobalContext(), APInt(8, 0));
+
+  std::vector<Value *> V;
+  V.push_back(s1);
+  V.push_back(CI);
+  V.push_back(s2);
+
+  MDNode *n1 = MDNode::get(Context, V);
+  Value *const c1 = n1;
+  MDNode *n2 = MDNode::get(Context, c1);
+  Value *const c2 = n2;
+  MDNode *n3 = MDNode::get(Context, V);
+  MDNode *n4 = MDNode::getIfExists(Context, V);
+  MDNode *n5 = MDNode::getIfExists(Context, c1);
+  MDNode *n6 = MDNode::getIfExists(Context, c2);
+  EXPECT_NE(n1, n2);
+#ifdef ENABLE_MDNODE_UNIQUING
+  EXPECT_EQ(n1, n3);
+#else
+  (void) n3;
+#endif
+  EXPECT_EQ(n4, n1);
+  EXPECT_EQ(n5, n2);
+  EXPECT_EQ(n6, (Value*)0);
+
+  EXPECT_EQ(3u, n1->getNumOperands());
+  EXPECT_EQ(s1, n1->getOperand(0));
+  EXPECT_EQ(CI, n1->getOperand(1));
+  EXPECT_EQ(s2, n1->getOperand(2));
+
+  EXPECT_EQ(1u, n2->getNumOperands());
+  EXPECT_EQ(n1, n2->getOperand(0));
+}
+
+TEST_F(MDNodeTest, Delete) {
+  Constant *C = ConstantInt::get(Type::getInt32Ty(getGlobalContext()), 1);
+  Instruction *I = new BitCastInst(C, Type::getInt32Ty(getGlobalContext()));
+
+  Value *const V = I;
+  MDNode *n = MDNode::get(Context, V);
+  WeakVH wvh = n;
+
+  EXPECT_EQ(n, wvh);
+
+  delete I;
+}
+
+TEST(NamedMDNodeTest, Search) {
+  LLVMContext Context;
+  Constant *C = ConstantInt::get(Type::getInt32Ty(Context), 1);
+  Constant *C2 = ConstantInt::get(Type::getInt32Ty(Context), 2);
+
+  Value *const V = C;
+  Value *const V2 = C2;
+  MDNode *n = MDNode::get(Context, V);
+  MDNode *n2 = MDNode::get(Context, V2);
+
+  Module M("MyModule", Context);
+  const char *Name = "llvm.NMD1";
+  NamedMDNode *NMD = M.getOrInsertNamedMetadata(Name);
+  NMD->addOperand(n);
+  NMD->addOperand(n2);
+
+  std::string Str;
+  raw_string_ostream oss(Str);
+  NMD->print(oss);
+  EXPECT_STREQ("!llvm.NMD1 = !{!0, !1}\n",
+               oss.str().c_str());
+}
+}