unittests/IR/MetadataTest.cpp

   1 //===- unittests/IR/MetadataTest.cpp - Metadata unit tests ----------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "llvm/ADT/STLExtras.h"
  11 #include "llvm/IR/Constants.h"
  12 #include "llvm/IR/DebugInfo.h"
  13 #include "llvm/IR/DebugInfoMetadata.h"
  14 #include "llvm/IR/Function.h"
  15 #include "llvm/IR/Instructions.h"
  16 #include "llvm/IR/LLVMContext.h"
  17 #include "llvm/IR/Metadata.h"
  18 #include "llvm/IR/Module.h"
  19 #include "llvm/IR/ModuleSlotTracker.h"
  20 #include "llvm/IR/Type.h"
  21 #include "llvm/IR/Verifier.h"
  22 #include "llvm/Support/raw_ostream.h"
  23 #include "gtest/gtest.h"
  24 using namespace llvm;
  25
  26 namespace {
  27
  28 TEST(ContextAndReplaceableUsesTest, FromContext) {
  29   LLVMContext Context;
  30   ContextAndReplaceableUses CRU(Context);
  31   EXPECT_EQ(&Context, &CRU.getContext());
  32   EXPECT_FALSE(CRU.hasReplaceableUses());
  33   EXPECT_FALSE(CRU.getReplaceableUses());
  34 }
  35
  36 TEST(ContextAndReplaceableUsesTest, FromReplaceableUses) {
  37   LLVMContext Context;
  38   ContextAndReplaceableUses CRU(make_unique<ReplaceableMetadataImpl>(Context));
  39   EXPECT_EQ(&Context, &CRU.getContext());
  40   EXPECT_TRUE(CRU.hasReplaceableUses());
  41   EXPECT_TRUE(CRU.getReplaceableUses());
  42 }
  43
  44 TEST(ContextAndReplaceableUsesTest, makeReplaceable) {
  45   LLVMContext Context;
  46   ContextAndReplaceableUses CRU(Context);
  47   CRU.makeReplaceable(make_unique<ReplaceableMetadataImpl>(Context));
  48   EXPECT_EQ(&Context, &CRU.getContext());
  49   EXPECT_TRUE(CRU.hasReplaceableUses());
  50   EXPECT_TRUE(CRU.getReplaceableUses());
  51 }
  52
  53 TEST(ContextAndReplaceableUsesTest, takeReplaceableUses) {
  54   LLVMContext Context;
  55   auto ReplaceableUses = make_unique<ReplaceableMetadataImpl>(Context);
  56   auto *Ptr = ReplaceableUses.get();
  57   ContextAndReplaceableUses CRU(std::move(ReplaceableUses));
  58   ReplaceableUses = CRU.takeReplaceableUses();
  59   EXPECT_EQ(&Context, &CRU.getContext());
  60   EXPECT_FALSE(CRU.hasReplaceableUses());
  61   EXPECT_FALSE(CRU.getReplaceableUses());
  62   EXPECT_EQ(Ptr, ReplaceableUses.get());
  63 }
  64
  65 class MetadataTest : public testing::Test {
  66 public:
  67   MetadataTest() : M("test", Context), Counter(0) {}
  68
  69 protected:
  70   LLVMContext Context;
  71   Module M;
  72   int Counter;
  73
  74   MDNode *getNode() { return MDNode::get(Context, None); }
  75   MDNode *getNode(Metadata *MD) { return MDNode::get(Context, MD); }
  76   MDNode *getNode(Metadata *MD1, Metadata *MD2) {
  77     Metadata *MDs[] = {MD1, MD2};
  78     return MDNode::get(Context, MDs);
  79   }
  80
  81   MDTuple *getTuple() { return MDTuple::getDistinct(Context, None); }
  82   DISubroutineType *getSubroutineType() {
  83     return DISubroutineType::getDistinct(Context, 0, getNode(nullptr));
  84   }
  85   DISubprogram *getSubprogram() {
  86     return DISubprogram::getDistinct(Context, nullptr, "", "", nullptr, 0,
  87                                      nullptr, false, false, 0, nullptr, 0, 0, 0,
  88                                      0);
  89   }
  90   DIScopeRef getSubprogramRef() { return getSubprogram()->getRef(); }
  91   DIFile *getFile() {
  92     return DIFile::getDistinct(Context, "file.c", "/path/to/dir");
  93   }
  94   DITypeRef getBasicType(StringRef Name) {
  95     return DIBasicType::get(Context, dwarf::DW_TAG_unspecified_type, Name)
  96         ->getRef();
  97   }
  98   DITypeRef getDerivedType() {
  99     return DIDerivedType::getDistinct(Context, dwarf::DW_TAG_pointer_type, "",
 100                                       nullptr, 0, nullptr,
 101                                       getBasicType("basictype"), 1, 2, 0, 0)
 102         ->getRef();
 103   }
 104   Constant *getConstant() {
 105     return ConstantInt::get(Type::getInt32Ty(Context), Counter++);
 106   }
 107   ConstantAsMetadata *getConstantAsMetadata() {
 108     return ConstantAsMetadata::get(getConstant());
 109   }
 110   DITypeRef getCompositeType() {
 111     return DICompositeType::getDistinct(
 112                Context, dwarf::DW_TAG_structure_type, "", nullptr, 0, nullptr,
 113                nullptr, 32, 32, 0, 0, nullptr, 0, nullptr, nullptr, "")
 114         ->getRef();
 115   }
 116   Function *getFunction(StringRef Name) {
 117     return cast<Function>(M.getOrInsertFunction(
 118         Name, FunctionType::get(Type::getVoidTy(Context), None, false)));
 119   }
 120 };
 121 typedef MetadataTest MDStringTest;
 122
 123 // Test that construction of MDString with different value produces different
 124 // MDString objects, even with the same string pointer and nulls in the string.
 125 TEST_F(MDStringTest, CreateDifferent) {
 126   char x[3] = { 'f', 0, 'A' };
 127   MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
 128   x[2] = 'B';
 129   MDString *s2 = MDString::get(Context, StringRef(&x[0], 3));
 130   EXPECT_NE(s1, s2);
 131 }
 132
 133 // Test that creation of MDStrings with the same string contents produces the
 134 // same MDString object, even with different pointers.
 135 TEST_F(MDStringTest, CreateSame) {
 136   char x[4] = { 'a', 'b', 'c', 'X' };
 137   char y[4] = { 'a', 'b', 'c', 'Y' };
 138
 139   MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
 140   MDString *s2 = MDString::get(Context, StringRef(&y[0], 3));
 141   EXPECT_EQ(s1, s2);
 142 }
 143
 144 // Test that MDString prints out the string we fed it.
 145 TEST_F(MDStringTest, PrintingSimple) {
 146   char *str = new char[13];
 147   strncpy(str, "testing 1 2 3", 13);
 148   MDString *s = MDString::get(Context, StringRef(str, 13));
 149   strncpy(str, "aaaaaaaaaaaaa", 13);
 150   delete[] str;
 151
 152   std::string Str;
 153   raw_string_ostream oss(Str);
 154   s->print(oss);
 155   EXPECT_STREQ("!\"testing 1 2 3\"", oss.str().c_str());
 156 }
 157
 158 // Test printing of MDString with non-printable characters.
 159 TEST_F(MDStringTest, PrintingComplex) {
 160   char str[5] = {0, '\n', '"', '\\', (char)-1};
 161   MDString *s = MDString::get(Context, StringRef(str+0, 5));
 162   std::string Str;
 163   raw_string_ostream oss(Str);
 164   s->print(oss);
 165   EXPECT_STREQ("!\"\\00\\0A\\22\\5C\\FF\"", oss.str().c_str());
 166 }
 167
 168 typedef MetadataTest MDNodeTest;
 169
 170 // Test the two constructors, and containing other Constants.
 171 TEST_F(MDNodeTest, Simple) {
 172   char x[3] = { 'a', 'b', 'c' };
 173   char y[3] = { '1', '2', '3' };
 174
 175   MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
 176   MDString *s2 = MDString::get(Context, StringRef(&y[0], 3));
 177   ConstantAsMetadata *CI = ConstantAsMetadata::get(
 178       ConstantInt::get(getGlobalContext(), APInt(8, 0)));
 179
 180   std::vector<Metadata *> V;
 181   V.push_back(s1);
 182   V.push_back(CI);
 183   V.push_back(s2);
 184
 185   MDNode *n1 = MDNode::get(Context, V);
 186   Metadata *const c1 = n1;
 187   MDNode *n2 = MDNode::get(Context, c1);
 188   Metadata *const c2 = n2;
 189   MDNode *n3 = MDNode::get(Context, V);
 190   MDNode *n4 = MDNode::getIfExists(Context, V);
 191   MDNode *n5 = MDNode::getIfExists(Context, c1);
 192   MDNode *n6 = MDNode::getIfExists(Context, c2);
 193   EXPECT_NE(n1, n2);
 194   EXPECT_EQ(n1, n3);
 195   EXPECT_EQ(n4, n1);
 196   EXPECT_EQ(n5, n2);
 197   EXPECT_EQ(n6, (Metadata *)nullptr);
 198
 199   EXPECT_EQ(3u, n1->getNumOperands());
 200   EXPECT_EQ(s1, n1->getOperand(0));
 201   EXPECT_EQ(CI, n1->getOperand(1));
 202   EXPECT_EQ(s2, n1->getOperand(2));
 203
 204   EXPECT_EQ(1u, n2->getNumOperands());
 205   EXPECT_EQ(n1, n2->getOperand(0));
 206 }
 207
 208 TEST_F(MDNodeTest, Delete) {
 209   Constant *C = ConstantInt::get(Type::getInt32Ty(getGlobalContext()), 1);
 210   Instruction *I = new BitCastInst(C, Type::getInt32Ty(getGlobalContext()));
 211
 212   Metadata *const V = LocalAsMetadata::get(I);
 213   MDNode *n = MDNode::get(Context, V);
 214   TrackingMDRef wvh(n);
 215
 216   EXPECT_EQ(n, wvh);
 217
 218   delete I;
 219 }
 220
 221 TEST_F(MDNodeTest, SelfReference) {
 222   // !0 = !{!0}
 223   // !1 = !{!0}
 224   {
 225     auto Temp = MDNode::getTemporary(Context, None);
 226     Metadata *Args[] = {Temp.get()};
 227     MDNode *Self = MDNode::get(Context, Args);
 228     Self->replaceOperandWith(0, Self);
 229     ASSERT_EQ(Self, Self->getOperand(0));
 230
 231     // Self-references should be distinct, so MDNode::get() should grab a
 232     // uniqued node that references Self, not Self.
 233     Args[0] = Self;
 234     MDNode *Ref1 = MDNode::get(Context, Args);
 235     MDNode *Ref2 = MDNode::get(Context, Args);
 236     EXPECT_NE(Self, Ref1);
 237     EXPECT_EQ(Ref1, Ref2);
 238   }
 239
 240   // !0 = !{!0, !{}}
 241   // !1 = !{!0, !{}}
 242   {
 243     auto Temp = MDNode::getTemporary(Context, None);
 244     Metadata *Args[] = {Temp.get(), MDNode::get(Context, None)};
 245     MDNode *Self = MDNode::get(Context, Args);
 246     Self->replaceOperandWith(0, Self);
 247     ASSERT_EQ(Self, Self->getOperand(0));
 248
 249     // Self-references should be distinct, so MDNode::get() should grab a
 250     // uniqued node that references Self, not Self itself.
 251     Args[0] = Self;
 252     MDNode *Ref1 = MDNode::get(Context, Args);
 253     MDNode *Ref2 = MDNode::get(Context, Args);
 254     EXPECT_NE(Self, Ref1);
 255     EXPECT_EQ(Ref1, Ref2);
 256   }
 257 }
 258
 259 TEST_F(MDNodeTest, Print) {
 260   Constant *C = ConstantInt::get(Type::getInt32Ty(Context), 7);
 261   MDString *S = MDString::get(Context, "foo");
 262   MDNode *N0 = getNode();
 263   MDNode *N1 = getNode(N0);
 264   MDNode *N2 = getNode(N0, N1);
 265
 266   Metadata *Args[] = {ConstantAsMetadata::get(C), S, nullptr, N0, N1, N2};
 267   MDNode *N = MDNode::get(Context, Args);
 268
 269   std::string Expected;
 270   {
 271     raw_string_ostream OS(Expected);
 272     OS << "<" << (void *)N << "> = !{";
 273     C->printAsOperand(OS);
 274     OS << ", ";
 275     S->printAsOperand(OS);
 276     OS << ", null";
 277     MDNode *Nodes[] = {N0, N1, N2};
 278     for (auto *Node : Nodes)
 279       OS << ", <" << (void *)Node << ">";
 280     OS << "}";
 281   }
 282
 283   std::string Actual;
 284   {
 285     raw_string_ostream OS(Actual);
 286     N->print(OS);
 287   }
 288
 289   EXPECT_EQ(Expected, Actual);
 290 }
 291
 292 #define EXPECT_PRINTER_EQ(EXPECTED, PRINT)                                     \
 293   do {                                                                         \
 294     std::string Actual_;                                                       \
 295     raw_string_ostream OS(Actual_);                                            \
 296     PRINT;                                                                     \
 297     OS.flush();                                                                \
 298     std::string Expected_(EXPECTED);                                           \
 299     EXPECT_EQ(Expected_, Actual_);                                             \
 300   } while (false)
 301
 302 TEST_F(MDNodeTest, PrintTemporary) {
 303   MDNode *Arg = getNode();
 304   TempMDNode Temp = MDNode::getTemporary(Context, Arg);
 305   MDNode *N = getNode(Temp.get());
 306   Module M("test", Context);
 307   NamedMDNode *NMD = M.getOrInsertNamedMetadata("named");
 308   NMD->addOperand(N);
 309
 310   EXPECT_PRINTER_EQ("!0 = !{!1}", N->print(OS, &M));
 311   EXPECT_PRINTER_EQ("!1 = <temporary!> !{!2}", Temp->print(OS, &M));
 312   EXPECT_PRINTER_EQ("!2 = !{}", Arg->print(OS, &M));
 313
 314   // Cleanup.
 315   Temp->replaceAllUsesWith(Arg);
 316 }
 317
 318 TEST_F(MDNodeTest, PrintFromModule) {
 319   Constant *C = ConstantInt::get(Type::getInt32Ty(Context), 7);
 320   MDString *S = MDString::get(Context, "foo");
 321   MDNode *N0 = getNode();
 322   MDNode *N1 = getNode(N0);
 323   MDNode *N2 = getNode(N0, N1);
 324
 325   Metadata *Args[] = {ConstantAsMetadata::get(C), S, nullptr, N0, N1, N2};
 326   MDNode *N = MDNode::get(Context, Args);
 327   Module M("test", Context);
 328   NamedMDNode *NMD = M.getOrInsertNamedMetadata("named");
 329   NMD->addOperand(N);
 330
 331   std::string Expected;
 332   {
 333     raw_string_ostream OS(Expected);
 334     OS << "!0 = !{";
 335     C->printAsOperand(OS);
 336     OS << ", ";
 337     S->printAsOperand(OS);
 338     OS << ", null, !1, !2, !3}";
 339   }
 340
 341   EXPECT_PRINTER_EQ(Expected, N->print(OS, &M));
 342 }
 343
 344 TEST_F(MDNodeTest, PrintFromFunction) {
 345   Module M("test", Context);
 346   auto *FTy = FunctionType::get(Type::getVoidTy(Context), false);
 347   auto *F0 = Function::Create(FTy, GlobalValue::ExternalLinkage, "F0", &M);
 348   auto *F1 = Function::Create(FTy, GlobalValue::ExternalLinkage, "F1", &M);
 349   auto *BB0 = BasicBlock::Create(Context, "entry", F0);
 350   auto *BB1 = BasicBlock::Create(Context, "entry", F1);
 351   auto *R0 = ReturnInst::Create(Context, BB0);
 352   auto *R1 = ReturnInst::Create(Context, BB1);
 353   auto *N0 = MDNode::getDistinct(Context, None);
 354   auto *N1 = MDNode::getDistinct(Context, None);
 355   R0->setMetadata("md", N0);
 356   R1->setMetadata("md", N1);
 357
 358   EXPECT_PRINTER_EQ("!0 = distinct !{}", N0->print(OS, &M));
 359   EXPECT_PRINTER_EQ("!1 = distinct !{}", N1->print(OS, &M));
 360
 361   ModuleSlotTracker MST(&M);
 362   EXPECT_PRINTER_EQ("!0 = distinct !{}", N0->print(OS, MST));
 363   EXPECT_PRINTER_EQ("!1 = distinct !{}", N1->print(OS, MST));
 364 }
 365
 366 TEST_F(MDNodeTest, PrintFromMetadataAsValue) {
 367   Module M("test", Context);
 368
 369   auto *Intrinsic =
 370       Function::Create(FunctionType::get(Type::getVoidTy(Context),
 371                                          Type::getMetadataTy(Context), false),
 372                        GlobalValue::ExternalLinkage, "llvm.intrinsic", &M);
 373
 374   auto *FTy = FunctionType::get(Type::getVoidTy(Context), false);
 375   auto *F0 = Function::Create(FTy, GlobalValue::ExternalLinkage, "F0", &M);
 376   auto *F1 = Function::Create(FTy, GlobalValue::ExternalLinkage, "F1", &M);
 377   auto *BB0 = BasicBlock::Create(Context, "entry", F0);
 378   auto *BB1 = BasicBlock::Create(Context, "entry", F1);
 379   auto *N0 = MDNode::getDistinct(Context, None);
 380   auto *N1 = MDNode::getDistinct(Context, None);
 381   auto *MAV0 = MetadataAsValue::get(Context, N0);
 382   auto *MAV1 = MetadataAsValue::get(Context, N1);
 383   CallInst::Create(Intrinsic, MAV0, "", BB0);
 384   CallInst::Create(Intrinsic, MAV1, "", BB1);
 385
 386   EXPECT_PRINTER_EQ("!0 = distinct !{}", MAV0->print(OS));
 387   EXPECT_PRINTER_EQ("!1 = distinct !{}", MAV1->print(OS));
 388   EXPECT_PRINTER_EQ("!0", MAV0->printAsOperand(OS, false));
 389   EXPECT_PRINTER_EQ("!1", MAV1->printAsOperand(OS, false));
 390   EXPECT_PRINTER_EQ("metadata !0", MAV0->printAsOperand(OS, true));
 391   EXPECT_PRINTER_EQ("metadata !1", MAV1->printAsOperand(OS, true));
 392
 393   ModuleSlotTracker MST(&M);
 394   EXPECT_PRINTER_EQ("!0 = distinct !{}", MAV0->print(OS, MST));
 395   EXPECT_PRINTER_EQ("!1 = distinct !{}", MAV1->print(OS, MST));
 396   EXPECT_PRINTER_EQ("!0", MAV0->printAsOperand(OS, false, MST));
 397   EXPECT_PRINTER_EQ("!1", MAV1->printAsOperand(OS, false, MST));
 398   EXPECT_PRINTER_EQ("metadata !0", MAV0->printAsOperand(OS, true, MST));
 399   EXPECT_PRINTER_EQ("metadata !1", MAV1->printAsOperand(OS, true, MST));
 400 }
 401 #undef EXPECT_PRINTER_EQ
 402
 403 TEST_F(MDNodeTest, NullOperand) {
 404   // metadata !{}
 405   MDNode *Empty = MDNode::get(Context, None);
 406
 407   // metadata !{metadata !{}}
 408   Metadata *Ops[] = {Empty};
 409   MDNode *N = MDNode::get(Context, Ops);
 410   ASSERT_EQ(Empty, N->getOperand(0));
 411
 412   // metadata !{metadata !{}} => metadata !{null}
 413   N->replaceOperandWith(0, nullptr);
 414   ASSERT_EQ(nullptr, N->getOperand(0));
 415
 416   // metadata !{null}
 417   Ops[0] = nullptr;
 418   MDNode *NullOp = MDNode::get(Context, Ops);
 419   ASSERT_EQ(nullptr, NullOp->getOperand(0));
 420   EXPECT_EQ(N, NullOp);
 421 }
 422
 423 TEST_F(MDNodeTest, DistinctOnUniquingCollision) {
 424   // !{}
 425   MDNode *Empty = MDNode::get(Context, None);
 426   ASSERT_TRUE(Empty->isResolved());
 427   EXPECT_FALSE(Empty->isDistinct());
 428
 429   // !{!{}}
 430   Metadata *Wrapped1Ops[] = {Empty};
 431   MDNode *Wrapped1 = MDNode::get(Context, Wrapped1Ops);
 432   ASSERT_EQ(Empty, Wrapped1->getOperand(0));
 433   ASSERT_TRUE(Wrapped1->isResolved());
 434   EXPECT_FALSE(Wrapped1->isDistinct());
 435
 436   // !{!{!{}}}
 437   Metadata *Wrapped2Ops[] = {Wrapped1};
 438   MDNode *Wrapped2 = MDNode::get(Context, Wrapped2Ops);
 439   ASSERT_EQ(Wrapped1, Wrapped2->getOperand(0));
 440   ASSERT_TRUE(Wrapped2->isResolved());
 441   EXPECT_FALSE(Wrapped2->isDistinct());
 442
 443   // !{!{!{}}} => !{!{}}
 444   Wrapped2->replaceOperandWith(0, Empty);
 445   ASSERT_EQ(Empty, Wrapped2->getOperand(0));
 446   EXPECT_TRUE(Wrapped2->isDistinct());
 447   EXPECT_FALSE(Wrapped1->isDistinct());
 448 }
 449
 450 TEST_F(MDNodeTest, getDistinct) {
 451   // !{}
 452   MDNode *Empty = MDNode::get(Context, None);
 453   ASSERT_TRUE(Empty->isResolved());
 454   ASSERT_FALSE(Empty->isDistinct());
 455   ASSERT_EQ(Empty, MDNode::get(Context, None));
 456
 457   // distinct !{}
 458   MDNode *Distinct1 = MDNode::getDistinct(Context, None);
 459   MDNode *Distinct2 = MDNode::getDistinct(Context, None);
 460   EXPECT_TRUE(Distinct1->isResolved());
 461   EXPECT_TRUE(Distinct2->isDistinct());
 462   EXPECT_NE(Empty, Distinct1);
 463   EXPECT_NE(Empty, Distinct2);
 464   EXPECT_NE(Distinct1, Distinct2);
 465
 466   // !{}
 467   ASSERT_EQ(Empty, MDNode::get(Context, None));
 468 }
 469
 470 TEST_F(MDNodeTest, isUniqued) {
 471   MDNode *U = MDTuple::get(Context, None);
 472   MDNode *D = MDTuple::getDistinct(Context, None);
 473   auto T = MDTuple::getTemporary(Context, None);
 474   EXPECT_TRUE(U->isUniqued());
 475   EXPECT_FALSE(D->isUniqued());
 476   EXPECT_FALSE(T->isUniqued());
 477 }
 478
 479 TEST_F(MDNodeTest, isDistinct) {
 480   MDNode *U = MDTuple::get(Context, None);
 481   MDNode *D = MDTuple::getDistinct(Context, None);
 482   auto T = MDTuple::getTemporary(Context, None);
 483   EXPECT_FALSE(U->isDistinct());
 484   EXPECT_TRUE(D->isDistinct());
 485   EXPECT_FALSE(T->isDistinct());
 486 }
 487
 488 TEST_F(MDNodeTest, isTemporary) {
 489   MDNode *U = MDTuple::get(Context, None);
 490   MDNode *D = MDTuple::getDistinct(Context, None);
 491   auto T = MDTuple::getTemporary(Context, None);
 492   EXPECT_FALSE(U->isTemporary());
 493   EXPECT_FALSE(D->isTemporary());
 494   EXPECT_TRUE(T->isTemporary());
 495 }
 496
 497 TEST_F(MDNodeTest, getDistinctWithUnresolvedOperands) {
 498   // temporary !{}
 499   auto Temp = MDTuple::getTemporary(Context, None);
 500   ASSERT_FALSE(Temp->isResolved());
 501
 502   // distinct !{temporary !{}}
 503   Metadata *Ops[] = {Temp.get()};
 504   MDNode *Distinct = MDNode::getDistinct(Context, Ops);
 505   EXPECT_TRUE(Distinct->isResolved());
 506   EXPECT_EQ(Temp.get(), Distinct->getOperand(0));
 507
 508   // temporary !{} => !{}
 509   MDNode *Empty = MDNode::get(Context, None);
 510   Temp->replaceAllUsesWith(Empty);
 511   EXPECT_EQ(Empty, Distinct->getOperand(0));
 512 }
 513
 514 TEST_F(MDNodeTest, handleChangedOperandRecursion) {
 515   // !0 = !{}
 516   MDNode *N0 = MDNode::get(Context, None);
 517
 518   // !1 = !{!3, null}
 519   auto Temp3 = MDTuple::getTemporary(Context, None);
 520   Metadata *Ops1[] = {Temp3.get(), nullptr};
 521   MDNode *N1 = MDNode::get(Context, Ops1);
 522
 523   // !2 = !{!3, !0}
 524   Metadata *Ops2[] = {Temp3.get(), N0};
 525   MDNode *N2 = MDNode::get(Context, Ops2);
 526
 527   // !3 = !{!2}
 528   Metadata *Ops3[] = {N2};
 529   MDNode *N3 = MDNode::get(Context, Ops3);
 530   Temp3->replaceAllUsesWith(N3);
 531
 532   // !4 = !{!1}
 533   Metadata *Ops4[] = {N1};
 534   MDNode *N4 = MDNode::get(Context, Ops4);
 535
 536   // Confirm that the cycle prevented RAUW from getting dropped.
 537   EXPECT_TRUE(N0->isResolved());
 538   EXPECT_FALSE(N1->isResolved());
 539   EXPECT_FALSE(N2->isResolved());
 540   EXPECT_FALSE(N3->isResolved());
 541   EXPECT_FALSE(N4->isResolved());
 542
 543   // Create a couple of distinct nodes to observe what's going on.
 544   //
 545   // !5 = distinct !{!2}
 546   // !6 = distinct !{!3}
 547   Metadata *Ops5[] = {N2};
 548   MDNode *N5 = MDNode::getDistinct(Context, Ops5);
 549   Metadata *Ops6[] = {N3};
 550   MDNode *N6 = MDNode::getDistinct(Context, Ops6);
 551
 552   // Mutate !2 to look like !1, causing a uniquing collision (and an RAUW).
 553   // This will ripple up, with !3 colliding with !4, and RAUWing.  Since !2
 554   // references !3, this can cause a re-entry of handleChangedOperand() when !3
 555   // is not ready for it.
 556   //
 557   // !2->replaceOperandWith(1, nullptr)
 558   // !2: !{!3, !0} => !{!3, null}
 559   // !2->replaceAllUsesWith(!1)
 560   // !3: !{!2] => !{!1}
 561   // !3->replaceAllUsesWith(!4)
 562   N2->replaceOperandWith(1, nullptr);
 563
 564   // If all has gone well, N2 and N3 will have been RAUW'ed and deleted from
 565   // under us.  Just check that the other nodes are sane.
 566   //
 567   // !1 = !{!4, null}
 568   // !4 = !{!1}
 569   // !5 = distinct !{!1}
 570   // !6 = distinct !{!4}
 571   EXPECT_EQ(N4, N1->getOperand(0));
 572   EXPECT_EQ(N1, N4->getOperand(0));
 573   EXPECT_EQ(N1, N5->getOperand(0));
 574   EXPECT_EQ(N4, N6->getOperand(0));
 575 }
 576
 577 TEST_F(MDNodeTest, replaceResolvedOperand) {
 578   // Check code for replacing one resolved operand with another.  If doing this
 579   // directly (via replaceOperandWith()) becomes illegal, change the operand to
 580   // a global value that gets RAUW'ed.
 581   //
 582   // Use a temporary node to keep N from being resolved.
 583   auto Temp = MDTuple::getTemporary(Context, None);
 584   Metadata *Ops[] = {nullptr, Temp.get()};
 585
 586   MDNode *Empty = MDTuple::get(Context, ArrayRef<Metadata *>());
 587   MDNode *N = MDTuple::get(Context, Ops);
 588   EXPECT_EQ(nullptr, N->getOperand(0));
 589   ASSERT_FALSE(N->isResolved());
 590
 591   // Check code for replacing resolved nodes.
 592   N->replaceOperandWith(0, Empty);
 593   EXPECT_EQ(Empty, N->getOperand(0));
 594
 595   // Check code for adding another unresolved operand.
 596   N->replaceOperandWith(0, Temp.get());
 597   EXPECT_EQ(Temp.get(), N->getOperand(0));
 598
 599   // Remove the references to Temp; required for teardown.
 600   Temp->replaceAllUsesWith(nullptr);
 601 }
 602
 603 TEST_F(MDNodeTest, replaceWithUniqued) {
 604   auto *Empty = MDTuple::get(Context, None);
 605   MDTuple *FirstUniqued;
 606   {
 607     Metadata *Ops[] = {Empty};
 608     auto Temp = MDTuple::getTemporary(Context, Ops);
 609     EXPECT_TRUE(Temp->isTemporary());
 610
 611     // Don't expect a collision.
 612     auto *Current = Temp.get();
 613     FirstUniqued = MDNode::replaceWithUniqued(std::move(Temp));
 614     EXPECT_TRUE(FirstUniqued->isUniqued());
 615     EXPECT_TRUE(FirstUniqued->isResolved());
 616     EXPECT_EQ(Current, FirstUniqued);
 617   }
 618   {
 619     Metadata *Ops[] = {Empty};
 620     auto Temp = MDTuple::getTemporary(Context, Ops);
 621     EXPECT_TRUE(Temp->isTemporary());
 622
 623     // Should collide with Uniqued above this time.
 624     auto *Uniqued = MDNode::replaceWithUniqued(std::move(Temp));
 625     EXPECT_TRUE(Uniqued->isUniqued());
 626     EXPECT_TRUE(Uniqued->isResolved());
 627     EXPECT_EQ(FirstUniqued, Uniqued);
 628   }
 629   {
 630     auto Unresolved = MDTuple::getTemporary(Context, None);
 631     Metadata *Ops[] = {Unresolved.get()};
 632     auto Temp = MDTuple::getTemporary(Context, Ops);
 633     EXPECT_TRUE(Temp->isTemporary());
 634
 635     // Shouldn't be resolved.
 636     auto *Uniqued = MDNode::replaceWithUniqued(std::move(Temp));
 637     EXPECT_TRUE(Uniqued->isUniqued());
 638     EXPECT_FALSE(Uniqued->isResolved());
 639
 640     // Should be a different node.
 641     EXPECT_NE(FirstUniqued, Uniqued);
 642
 643     // Should resolve when we update its node (note: be careful to avoid a
 644     // collision with any other nodes above).
 645     Uniqued->replaceOperandWith(0, nullptr);
 646     EXPECT_TRUE(Uniqued->isResolved());
 647   }
 648 }
 649
 650 TEST_F(MDNodeTest, replaceWithUniquedResolvingOperand) {
 651   // temp !{}
 652   MDTuple *Op = MDTuple::getTemporary(Context, None).release();
 653   EXPECT_FALSE(Op->isResolved());
 654
 655   // temp !{temp !{}}
 656   Metadata *Ops[] = {Op};
 657   MDTuple *N = MDTuple::getTemporary(Context, Ops).release();
 658   EXPECT_FALSE(N->isResolved());
 659
 660   // temp !{temp !{}} => !{temp !{}}
 661   ASSERT_EQ(N, MDNode::replaceWithUniqued(TempMDTuple(N)));
 662   EXPECT_FALSE(N->isResolved());
 663
 664   // !{temp !{}} => !{!{}}
 665   ASSERT_EQ(Op, MDNode::replaceWithUniqued(TempMDTuple(Op)));
 666   EXPECT_TRUE(Op->isResolved());
 667   EXPECT_TRUE(N->isResolved());
 668 }
 669
 670 TEST_F(MDNodeTest, replaceWithUniquedChangingOperand) {
 671   // i1* @GV
 672   Type *Ty = Type::getInt1PtrTy(Context);
 673   std::unique_ptr<GlobalVariable> GV(
 674       new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
 675   ConstantAsMetadata *Op = ConstantAsMetadata::get(GV.get());
 676
 677   // temp !{i1* @GV}
 678   Metadata *Ops[] = {Op};
 679   MDTuple *N = MDTuple::getTemporary(Context, Ops).release();
 680
 681   // temp !{i1* @GV} => !{i1* @GV}
 682   ASSERT_EQ(N, MDNode::replaceWithUniqued(TempMDTuple(N)));
 683   ASSERT_TRUE(N->isUniqued());
 684
 685   // !{i1* @GV} => !{null}
 686   GV.reset();
 687   ASSERT_TRUE(N->isUniqued());
 688   Metadata *NullOps[] = {nullptr};
 689   ASSERT_EQ(N, MDTuple::get(Context, NullOps));
 690 }
 691
 692 TEST_F(MDNodeTest, replaceWithDistinct) {
 693   {
 694     auto *Empty = MDTuple::get(Context, None);
 695     Metadata *Ops[] = {Empty};
 696     auto Temp = MDTuple::getTemporary(Context, Ops);
 697     EXPECT_TRUE(Temp->isTemporary());
 698
 699     // Don't expect a collision.
 700     auto *Current = Temp.get();
 701     auto *Distinct = MDNode::replaceWithDistinct(std::move(Temp));
 702     EXPECT_TRUE(Distinct->isDistinct());
 703     EXPECT_TRUE(Distinct->isResolved());
 704     EXPECT_EQ(Current, Distinct);
 705   }
 706   {
 707     auto Unresolved = MDTuple::getTemporary(Context, None);
 708     Metadata *Ops[] = {Unresolved.get()};
 709     auto Temp = MDTuple::getTemporary(Context, Ops);
 710     EXPECT_TRUE(Temp->isTemporary());
 711
 712     // Don't expect a collision.
 713     auto *Current = Temp.get();
 714     auto *Distinct = MDNode::replaceWithDistinct(std::move(Temp));
 715     EXPECT_TRUE(Distinct->isDistinct());
 716     EXPECT_TRUE(Distinct->isResolved());
 717     EXPECT_EQ(Current, Distinct);
 718
 719     // Cleanup; required for teardown.
 720     Unresolved->replaceAllUsesWith(nullptr);
 721   }
 722 }
 723
 724 TEST_F(MDNodeTest, replaceWithPermanent) {
 725   Metadata *Ops[] = {nullptr};
 726   auto Temp = MDTuple::getTemporary(Context, Ops);
 727   auto *T = Temp.get();
 728
 729   // U is a normal, uniqued node that references T.
 730   auto *U = MDTuple::get(Context, T);
 731   EXPECT_TRUE(U->isUniqued());
 732
 733   // Make Temp self-referencing.
 734   Temp->replaceOperandWith(0, T);
 735
 736   // Try to uniquify Temp.  This should, despite the name in the API, give a
 737   // 'distinct' node, since self-references aren't allowed to be uniqued.
 738   //
 739   // Since it's distinct, N should have the same address as when it was a
 740   // temporary (i.e., be equal to T not U).
 741   auto *N = MDNode::replaceWithPermanent(std::move(Temp));
 742   EXPECT_EQ(N, T);
 743   EXPECT_TRUE(N->isDistinct());
 744
 745   // U should be the canonical unique node with N as the argument.
 746   EXPECT_EQ(U, MDTuple::get(Context, N));
 747   EXPECT_TRUE(U->isUniqued());
 748
 749   // This temporary should collide with U when replaced, but it should still be
 750   // uniqued.
 751   EXPECT_EQ(U, MDNode::replaceWithPermanent(MDTuple::getTemporary(Context, N)));
 752   EXPECT_TRUE(U->isUniqued());
 753
 754   // This temporary should become a new uniqued node.
 755   auto Temp2 = MDTuple::getTemporary(Context, U);
 756   auto *V = Temp2.get();
 757   EXPECT_EQ(V, MDNode::replaceWithPermanent(std::move(Temp2)));
 758   EXPECT_TRUE(V->isUniqued());
 759   EXPECT_EQ(U, V->getOperand(0));
 760 }
 761
 762 TEST_F(MDNodeTest, deleteTemporaryWithTrackingRef) {
 763   TrackingMDRef Ref;
 764   EXPECT_EQ(nullptr, Ref.get());
 765   {
 766     auto Temp = MDTuple::getTemporary(Context, None);
 767     Ref.reset(Temp.get());
 768     EXPECT_EQ(Temp.get(), Ref.get());
 769   }
 770   EXPECT_EQ(nullptr, Ref.get());
 771 }
 772
 773 typedef MetadataTest DILocationTest;
 774
 775 TEST_F(DILocationTest, Overflow) {
 776   DISubprogram *N = getSubprogram();
 777   {
 778     DILocation *L = DILocation::get(Context, 2, 7, N);
 779     EXPECT_EQ(2u, L->getLine());
 780     EXPECT_EQ(7u, L->getColumn());
 781   }
 782   unsigned U16 = 1u << 16;
 783   {
 784     DILocation *L = DILocation::get(Context, UINT32_MAX, U16 - 1, N);
 785     EXPECT_EQ(UINT32_MAX, L->getLine());
 786     EXPECT_EQ(U16 - 1, L->getColumn());
 787   }
 788   {
 789     DILocation *L = DILocation::get(Context, UINT32_MAX, U16, N);
 790     EXPECT_EQ(UINT32_MAX, L->getLine());
 791     EXPECT_EQ(0u, L->getColumn());
 792   }
 793   {
 794     DILocation *L = DILocation::get(Context, UINT32_MAX, U16 + 1, N);
 795     EXPECT_EQ(UINT32_MAX, L->getLine());
 796     EXPECT_EQ(0u, L->getColumn());
 797   }
 798 }
 799
 800 TEST_F(DILocationTest, getDistinct) {
 801   MDNode *N = getSubprogram();
 802   DILocation *L0 = DILocation::getDistinct(Context, 2, 7, N);
 803   EXPECT_TRUE(L0->isDistinct());
 804   DILocation *L1 = DILocation::get(Context, 2, 7, N);
 805   EXPECT_FALSE(L1->isDistinct());
 806   EXPECT_EQ(L1, DILocation::get(Context, 2, 7, N));
 807 }
 808
 809 TEST_F(DILocationTest, getTemporary) {
 810   MDNode *N = MDNode::get(Context, None);
 811   auto L = DILocation::getTemporary(Context, 2, 7, N);
 812   EXPECT_TRUE(L->isTemporary());
 813   EXPECT_FALSE(L->isResolved());
 814 }
 815
 816 TEST_F(DILocationTest, cloneTemporary) {
 817   MDNode *N = MDNode::get(Context, None);
 818   auto L = DILocation::getTemporary(Context, 2, 7, N);
 819   EXPECT_TRUE(L->isTemporary());
 820   auto L2 = L->clone();
 821   EXPECT_TRUE(L2->isTemporary());
 822 }
 823
 824 typedef MetadataTest GenericDINodeTest;
 825
 826 TEST_F(GenericDINodeTest, get) {
 827   StringRef Header = "header";
 828   auto *Empty = MDNode::get(Context, None);
 829   Metadata *Ops1[] = {Empty};
 830   auto *N = GenericDINode::get(Context, 15, Header, Ops1);
 831   EXPECT_EQ(15u, N->getTag());
 832   EXPECT_EQ(2u, N->getNumOperands());
 833   EXPECT_EQ(Header, N->getHeader());
 834   EXPECT_EQ(MDString::get(Context, Header), N->getOperand(0));
 835   EXPECT_EQ(1u, N->getNumDwarfOperands());
 836   EXPECT_EQ(Empty, N->getDwarfOperand(0));
 837   EXPECT_EQ(Empty, N->getOperand(1));
 838   ASSERT_TRUE(N->isUniqued());
 839
 840   EXPECT_EQ(N, GenericDINode::get(Context, 15, Header, Ops1));
 841
 842   N->replaceOperandWith(1, nullptr);
 843   EXPECT_EQ(15u, N->getTag());
 844   EXPECT_EQ(Header, N->getHeader());
 845   EXPECT_EQ(nullptr, N->getDwarfOperand(0));
 846   ASSERT_TRUE(N->isUniqued());
 847
 848   Metadata *Ops2[] = {nullptr};
 849   EXPECT_EQ(N, GenericDINode::get(Context, 15, Header, Ops2));
 850
 851   N->replaceDwarfOperandWith(0, Empty);
 852   EXPECT_EQ(15u, N->getTag());
 853   EXPECT_EQ(Header, N->getHeader());
 854   EXPECT_EQ(Empty, N->getDwarfOperand(0));
 855   ASSERT_TRUE(N->isUniqued());
 856   EXPECT_EQ(N, GenericDINode::get(Context, 15, Header, Ops1));
 857
 858   TempGenericDINode Temp = N->clone();
 859   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
 860 }
 861
 862 TEST_F(GenericDINodeTest, getEmptyHeader) {
 863   // Canonicalize !"" to null.
 864   auto *N = GenericDINode::get(Context, 15, StringRef(), None);
 865   EXPECT_EQ(StringRef(), N->getHeader());
 866   EXPECT_EQ(nullptr, N->getOperand(0));
 867 }
 868
 869 typedef MetadataTest DISubrangeTest;
 870
 871 TEST_F(DISubrangeTest, get) {
 872   auto *N = DISubrange::get(Context, 5, 7);
 873   EXPECT_EQ(dwarf::DW_TAG_subrange_type, N->getTag());
 874   EXPECT_EQ(5, N->getCount());
 875   EXPECT_EQ(7, N->getLowerBound());
 876   EXPECT_EQ(N, DISubrange::get(Context, 5, 7));
 877   EXPECT_EQ(DISubrange::get(Context, 5, 0), DISubrange::get(Context, 5));
 878
 879   TempDISubrange Temp = N->clone();
 880   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
 881 }
 882
 883 TEST_F(DISubrangeTest, getEmptyArray) {
 884   auto *N = DISubrange::get(Context, -1, 0);
 885   EXPECT_EQ(dwarf::DW_TAG_subrange_type, N->getTag());
 886   EXPECT_EQ(-1, N->getCount());
 887   EXPECT_EQ(0, N->getLowerBound());
 888   EXPECT_EQ(N, DISubrange::get(Context, -1, 0));
 889 }
 890
 891 typedef MetadataTest DIEnumeratorTest;
 892
 893 TEST_F(DIEnumeratorTest, get) {
 894   auto *N = DIEnumerator::get(Context, 7, "name");
 895   EXPECT_EQ(dwarf::DW_TAG_enumerator, N->getTag());
 896   EXPECT_EQ(7, N->getValue());
 897   EXPECT_EQ("name", N->getName());
 898   EXPECT_EQ(N, DIEnumerator::get(Context, 7, "name"));
 899
 900   EXPECT_NE(N, DIEnumerator::get(Context, 8, "name"));
 901   EXPECT_NE(N, DIEnumerator::get(Context, 7, "nam"));
 902
 903   TempDIEnumerator Temp = N->clone();
 904   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
 905 }
 906
 907 typedef MetadataTest DIBasicTypeTest;
 908
 909 TEST_F(DIBasicTypeTest, get) {
 910   auto *N =
 911       DIBasicType::get(Context, dwarf::DW_TAG_base_type, "special", 33, 26, 7);
 912   EXPECT_EQ(dwarf::DW_TAG_base_type, N->getTag());
 913   EXPECT_EQ("special", N->getName());
 914   EXPECT_EQ(33u, N->getSizeInBits());
 915   EXPECT_EQ(26u, N->getAlignInBits());
 916   EXPECT_EQ(7u, N->getEncoding());
 917   EXPECT_EQ(0u, N->getLine());
 918   EXPECT_EQ(N, DIBasicType::get(Context, dwarf::DW_TAG_base_type, "special", 33,
 919                                 26, 7));
 920
 921   EXPECT_NE(N, DIBasicType::get(Context, dwarf::DW_TAG_unspecified_type,
 922                                 "special", 33, 26, 7));
 923   EXPECT_NE(N,
 924             DIBasicType::get(Context, dwarf::DW_TAG_base_type, "s", 33, 26, 7));
 925   EXPECT_NE(N, DIBasicType::get(Context, dwarf::DW_TAG_base_type, "special", 32,
 926                                 26, 7));
 927   EXPECT_NE(N, DIBasicType::get(Context, dwarf::DW_TAG_base_type, "special", 33,
 928                                 25, 7));
 929   EXPECT_NE(N, DIBasicType::get(Context, dwarf::DW_TAG_base_type, "special", 33,
 930                                 26, 6));
 931
 932   TempDIBasicType Temp = N->clone();
 933   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
 934 }
 935
 936 TEST_F(DIBasicTypeTest, getWithLargeValues) {
 937   auto *N = DIBasicType::get(Context, dwarf::DW_TAG_base_type, "special",
 938                              UINT64_MAX, UINT64_MAX - 1, 7);
 939   EXPECT_EQ(UINT64_MAX, N->getSizeInBits());
 940   EXPECT_EQ(UINT64_MAX - 1, N->getAlignInBits());
 941 }
 942
 943 TEST_F(DIBasicTypeTest, getUnspecified) {
 944   auto *N =
 945       DIBasicType::get(Context, dwarf::DW_TAG_unspecified_type, "unspecified");
 946   EXPECT_EQ(dwarf::DW_TAG_unspecified_type, N->getTag());
 947   EXPECT_EQ("unspecified", N->getName());
 948   EXPECT_EQ(0u, N->getSizeInBits());
 949   EXPECT_EQ(0u, N->getAlignInBits());
 950   EXPECT_EQ(0u, N->getEncoding());
 951   EXPECT_EQ(0u, N->getLine());
 952 }
 953
 954 typedef MetadataTest DITypeTest;
 955
 956 TEST_F(DITypeTest, clone) {
 957   // Check that DIType has a specialized clone that returns TempDIType.
 958   DIType *N = DIBasicType::get(Context, dwarf::DW_TAG_base_type, "int", 32, 32,
 959                                dwarf::DW_ATE_signed);
 960
 961   TempDIType Temp = N->clone();
 962   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
 963 }
 964
 965 TEST_F(DITypeTest, setFlags) {
 966   // void (void)
 967   Metadata *TypesOps[] = {nullptr};
 968   Metadata *Types = MDTuple::get(Context, TypesOps);
 969
 970   DIType *D = DISubroutineType::getDistinct(Context, 0u, Types);
 971   EXPECT_EQ(0u, D->getFlags());
 972   D->setFlags(DINode::FlagRValueReference);
 973   EXPECT_EQ(DINode::FlagRValueReference, D->getFlags());
 974   D->setFlags(0u);
 975   EXPECT_EQ(0u, D->getFlags());
 976
 977   TempDIType T = DISubroutineType::getTemporary(Context, 0u, Types);
 978   EXPECT_EQ(0u, T->getFlags());
 979   T->setFlags(DINode::FlagRValueReference);
 980   EXPECT_EQ(DINode::FlagRValueReference, T->getFlags());
 981   T->setFlags(0u);
 982   EXPECT_EQ(0u, T->getFlags());
 983 }
 984
 985 typedef MetadataTest DIDerivedTypeTest;
 986
 987 TEST_F(DIDerivedTypeTest, get) {
 988   DIFile *File = getFile();
 989   DIScopeRef Scope = getSubprogramRef();
 990   DITypeRef BaseType = getBasicType("basic");
 991   MDTuple *ExtraData = getTuple();
 992
 993   auto *N = DIDerivedType::get(Context, dwarf::DW_TAG_pointer_type, "something",
 994                                File, 1, Scope, BaseType, 2, 3, 4, 5, ExtraData);
 995   EXPECT_EQ(dwarf::DW_TAG_pointer_type, N->getTag());
 996   EXPECT_EQ("something", N->getName());
 997   EXPECT_EQ(File, N->getFile());
 998   EXPECT_EQ(1u, N->getLine());
 999   EXPECT_EQ(Scope, N->getScope());
1000   EXPECT_EQ(BaseType, N->getBaseType());
1001   EXPECT_EQ(2u, N->getSizeInBits());
1002   EXPECT_EQ(3u, N->getAlignInBits());
1003   EXPECT_EQ(4u, N->getOffsetInBits());
1004   EXPECT_EQ(5u, N->getFlags());
1005   EXPECT_EQ(ExtraData, N->getExtraData());
1006   EXPECT_EQ(N, DIDerivedType::get(Context, dwarf::DW_TAG_pointer_type,
1007                                   "something", File, 1, Scope, BaseType, 2, 3,
1008                                   4, 5, ExtraData));
1009
1010   EXPECT_NE(N, DIDerivedType::get(Context, dwarf::DW_TAG_reference_type,
1011                                   "something", File, 1, Scope, BaseType, 2, 3,
1012                                   4, 5, ExtraData));
1013   EXPECT_NE(N, DIDerivedType::get(Context, dwarf::DW_TAG_pointer_type, "else",
1014                                   File, 1, Scope, BaseType, 2, 3, 4, 5,
1015                                   ExtraData));
1016   EXPECT_NE(N, DIDerivedType::get(Context, dwarf::DW_TAG_pointer_type,
1017                                   "something", getFile(), 1, Scope, BaseType, 2,
1018                                   3, 4, 5, ExtraData));
1019   EXPECT_NE(N, DIDerivedType::get(Context, dwarf::DW_TAG_pointer_type,
1020                                   "something", File, 2, Scope, BaseType, 2, 3,
1021                                   4, 5, ExtraData));
1022   EXPECT_NE(N, DIDerivedType::get(Context, dwarf::DW_TAG_pointer_type,
1023                                   "something", File, 1, getSubprogramRef(),
1024                                   BaseType, 2, 3, 4, 5, ExtraData));
1025   EXPECT_NE(N, DIDerivedType::get(
1026                    Context, dwarf::DW_TAG_pointer_type, "something", File, 1,
1027                    Scope, getBasicType("basic2"), 2, 3, 4, 5, ExtraData));
1028   EXPECT_NE(N, DIDerivedType::get(Context, dwarf::DW_TAG_pointer_type,
1029                                   "something", File, 1, Scope, BaseType, 3, 3,
1030                                   4, 5, ExtraData));
1031   EXPECT_NE(N, DIDerivedType::get(Context, dwarf::DW_TAG_pointer_type,
1032                                   "something", File, 1, Scope, BaseType, 2, 2,
1033                                   4, 5, ExtraData));
1034   EXPECT_NE(N, DIDerivedType::get(Context, dwarf::DW_TAG_pointer_type,
1035                                   "something", File, 1, Scope, BaseType, 2, 3,
1036                                   5, 5, ExtraData));
1037   EXPECT_NE(N, DIDerivedType::get(Context, dwarf::DW_TAG_pointer_type,
1038                                   "something", File, 1, Scope, BaseType, 2, 3,
1039                                   4, 4, ExtraData));
1040   EXPECT_NE(N, DIDerivedType::get(Context, dwarf::DW_TAG_pointer_type,
1041                                   "something", File, 1, Scope, BaseType, 2, 3,
1042                                   4, 5, getTuple()));
1043
1044   TempDIDerivedType Temp = N->clone();
1045   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1046 }
1047
1048 TEST_F(DIDerivedTypeTest, getWithLargeValues) {
1049   DIFile *File = getFile();
1050   DIScopeRef Scope = getSubprogramRef();
1051   DITypeRef BaseType = getBasicType("basic");
1052   MDTuple *ExtraData = getTuple();
1053
1054   auto *N = DIDerivedType::get(Context, dwarf::DW_TAG_pointer_type, "something",
1055                                File, 1, Scope, BaseType, UINT64_MAX,
1056                                UINT64_MAX - 1, UINT64_MAX - 2, 5, ExtraData);
1057   EXPECT_EQ(UINT64_MAX, N->getSizeInBits());
1058   EXPECT_EQ(UINT64_MAX - 1, N->getAlignInBits());
1059   EXPECT_EQ(UINT64_MAX - 2, N->getOffsetInBits());
1060 }
1061
1062 typedef MetadataTest DICompositeTypeTest;
1063
1064 TEST_F(DICompositeTypeTest, get) {
1065   unsigned Tag = dwarf::DW_TAG_structure_type;
1066   StringRef Name = "some name";
1067   DIFile *File = getFile();
1068   unsigned Line = 1;
1069   DIScopeRef Scope = getSubprogramRef();
1070   DITypeRef BaseType = getCompositeType();
1071   uint64_t SizeInBits = 2;
1072   uint64_t AlignInBits = 3;
1073   uint64_t OffsetInBits = 4;
1074   unsigned Flags = 5;
1075   MDTuple *Elements = getTuple();
1076   unsigned RuntimeLang = 6;
1077   DITypeRef VTableHolder = getCompositeType();
1078   MDTuple *TemplateParams = getTuple();
1079   StringRef Identifier = "some id";
1080
1081   auto *N = DICompositeType::get(Context, Tag, Name, File, Line, Scope,
1082                                  BaseType, SizeInBits, AlignInBits,
1083                                  OffsetInBits, Flags, Elements, RuntimeLang,
1084                                  VTableHolder, TemplateParams, Identifier);
1085   EXPECT_EQ(Tag, N->getTag());
1086   EXPECT_EQ(Name, N->getName());
1087   EXPECT_EQ(File, N->getFile());
1088   EXPECT_EQ(Line, N->getLine());
1089   EXPECT_EQ(Scope, N->getScope());
1090   EXPECT_EQ(BaseType, N->getBaseType());
1091   EXPECT_EQ(SizeInBits, N->getSizeInBits());
1092   EXPECT_EQ(AlignInBits, N->getAlignInBits());
1093   EXPECT_EQ(OffsetInBits, N->getOffsetInBits());
1094   EXPECT_EQ(Flags, N->getFlags());
1095   EXPECT_EQ(Elements, N->getElements().get());
1096   EXPECT_EQ(RuntimeLang, N->getRuntimeLang());
1097   EXPECT_EQ(VTableHolder, N->getVTableHolder());
1098   EXPECT_EQ(TemplateParams, N->getTemplateParams().get());
1099   EXPECT_EQ(Identifier, N->getIdentifier());
1100
1101   EXPECT_EQ(N, DICompositeType::get(Context, Tag, Name, File, Line, Scope,
1102                                     BaseType, SizeInBits, AlignInBits,
1103                                     OffsetInBits, Flags, Elements, RuntimeLang,
1104                                     VTableHolder, TemplateParams, Identifier));
1105
1106   EXPECT_NE(N, DICompositeType::get(Context, Tag + 1, Name, File, Line, Scope,
1107                                     BaseType, SizeInBits, AlignInBits,
1108                                     OffsetInBits, Flags, Elements, RuntimeLang,
1109                                     VTableHolder, TemplateParams, Identifier));
1110   EXPECT_NE(N, DICompositeType::get(Context, Tag, "abc", File, Line, Scope,
1111                                     BaseType, SizeInBits, AlignInBits,
1112                                     OffsetInBits, Flags, Elements, RuntimeLang,
1113                                     VTableHolder, TemplateParams, Identifier));
1114   EXPECT_NE(N, DICompositeType::get(Context, Tag, Name, getFile(), Line, Scope,
1115                                     BaseType, SizeInBits, AlignInBits,
1116                                     OffsetInBits, Flags, Elements, RuntimeLang,
1117                                     VTableHolder, TemplateParams, Identifier));
1118   EXPECT_NE(N, DICompositeType::get(Context, Tag, Name, File, Line + 1, Scope,
1119                                     BaseType, SizeInBits, AlignInBits,
1120                                     OffsetInBits, Flags, Elements, RuntimeLang,
1121                                     VTableHolder, TemplateParams, Identifier));
1122   EXPECT_NE(N, DICompositeType::get(
1123                    Context, Tag, Name, File, Line, getSubprogramRef(), BaseType,
1124                    SizeInBits, AlignInBits, OffsetInBits, Flags, Elements,
1125                    RuntimeLang, VTableHolder, TemplateParams, Identifier));
1126   EXPECT_NE(N, DICompositeType::get(
1127                    Context, Tag, Name, File, Line, Scope, getBasicType("other"),
1128                    SizeInBits, AlignInBits, OffsetInBits, Flags, Elements,
1129                    RuntimeLang, VTableHolder, TemplateParams, Identifier));
1130   EXPECT_NE(N, DICompositeType::get(Context, Tag, Name, File, Line, Scope,
1131                                     BaseType, SizeInBits + 1, AlignInBits,
1132                                     OffsetInBits, Flags, Elements, RuntimeLang,
1133                                     VTableHolder, TemplateParams, Identifier));
1134   EXPECT_NE(N, DICompositeType::get(Context, Tag, Name, File, Line, Scope,
1135                                     BaseType, SizeInBits, AlignInBits + 1,
1136                                     OffsetInBits, Flags, Elements, RuntimeLang,
1137                                     VTableHolder, TemplateParams, Identifier));
1138   EXPECT_NE(N, DICompositeType::get(
1139                    Context, Tag, Name, File, Line, Scope, BaseType, SizeInBits,
1140                    AlignInBits, OffsetInBits + 1, Flags, Elements, RuntimeLang,
1141                    VTableHolder, TemplateParams, Identifier));
1142   EXPECT_NE(N, DICompositeType::get(
1143                    Context, Tag, Name, File, Line, Scope, BaseType, SizeInBits,
1144                    AlignInBits, OffsetInBits, Flags + 1, Elements, RuntimeLang,
1145                    VTableHolder, TemplateParams, Identifier));
1146   EXPECT_NE(N, DICompositeType::get(
1147                    Context, Tag, Name, File, Line, Scope, BaseType, SizeInBits,
1148                    AlignInBits, OffsetInBits, Flags, getTuple(), RuntimeLang,
1149                    VTableHolder, TemplateParams, Identifier));
1150   EXPECT_NE(N, DICompositeType::get(
1151                    Context, Tag, Name, File, Line, Scope, BaseType, SizeInBits,
1152                    AlignInBits, OffsetInBits, Flags, Elements, RuntimeLang + 1,
1153                    VTableHolder, TemplateParams, Identifier));
1154   EXPECT_NE(N, DICompositeType::get(
1155                    Context, Tag, Name, File, Line, Scope, BaseType, SizeInBits,
1156                    AlignInBits, OffsetInBits, Flags, Elements, RuntimeLang,
1157                    getCompositeType(), TemplateParams, Identifier));
1158   EXPECT_NE(N, DICompositeType::get(Context, Tag, Name, File, Line, Scope,
1159                                     BaseType, SizeInBits, AlignInBits,
1160                                     OffsetInBits, Flags, Elements, RuntimeLang,
1161                                     VTableHolder, getTuple(), Identifier));
1162   EXPECT_NE(N, DICompositeType::get(Context, Tag, Name, File, Line, Scope,
1163                                     BaseType, SizeInBits, AlignInBits,
1164                                     OffsetInBits, Flags, Elements, RuntimeLang,
1165                                     VTableHolder, TemplateParams, "other"));
1166
1167   // Be sure that missing identifiers get null pointers.
1168   EXPECT_FALSE(DICompositeType::get(Context, Tag, Name, File, Line, Scope,
1169                                     BaseType, SizeInBits, AlignInBits,
1170                                     OffsetInBits, Flags, Elements, RuntimeLang,
1171                                     VTableHolder, TemplateParams, "")
1172                    ->getRawIdentifier());
1173   EXPECT_FALSE(DICompositeType::get(Context, Tag, Name, File, Line, Scope,
1174                                     BaseType, SizeInBits, AlignInBits,
1175                                     OffsetInBits, Flags, Elements, RuntimeLang,
1176                                     VTableHolder, TemplateParams)
1177                    ->getRawIdentifier());
1178
1179   TempDICompositeType Temp = N->clone();
1180   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1181 }
1182
1183 TEST_F(DICompositeTypeTest, getWithLargeValues) {
1184   unsigned Tag = dwarf::DW_TAG_structure_type;
1185   StringRef Name = "some name";
1186   DIFile *File = getFile();
1187   unsigned Line = 1;
1188   DIScopeRef Scope = getSubprogramRef();
1189   DITypeRef BaseType = getCompositeType();
1190   uint64_t SizeInBits = UINT64_MAX;
1191   uint64_t AlignInBits = UINT64_MAX - 1;
1192   uint64_t OffsetInBits = UINT64_MAX - 2;
1193   unsigned Flags = 5;
1194   MDTuple *Elements = getTuple();
1195   unsigned RuntimeLang = 6;
1196   DITypeRef VTableHolder = getCompositeType();
1197   MDTuple *TemplateParams = getTuple();
1198   StringRef Identifier = "some id";
1199
1200   auto *N = DICompositeType::get(Context, Tag, Name, File, Line, Scope,
1201                                  BaseType, SizeInBits, AlignInBits,
1202                                  OffsetInBits, Flags, Elements, RuntimeLang,
1203                                  VTableHolder, TemplateParams, Identifier);
1204   EXPECT_EQ(SizeInBits, N->getSizeInBits());
1205   EXPECT_EQ(AlignInBits, N->getAlignInBits());
1206   EXPECT_EQ(OffsetInBits, N->getOffsetInBits());
1207 }
1208
1209 TEST_F(DICompositeTypeTest, replaceOperands) {
1210   unsigned Tag = dwarf::DW_TAG_structure_type;
1211   StringRef Name = "some name";
1212   DIFile *File = getFile();
1213   unsigned Line = 1;
1214   DIScopeRef Scope = getSubprogramRef();
1215   DITypeRef BaseType = getCompositeType();
1216   uint64_t SizeInBits = 2;
1217   uint64_t AlignInBits = 3;
1218   uint64_t OffsetInBits = 4;
1219   unsigned Flags = 5;
1220   unsigned RuntimeLang = 6;
1221   StringRef Identifier = "some id";
1222
1223   auto *N = DICompositeType::get(
1224       Context, Tag, Name, File, Line, Scope, BaseType, SizeInBits, AlignInBits,
1225       OffsetInBits, Flags, nullptr, RuntimeLang, nullptr, nullptr, Identifier);
1226
1227   auto *Elements = MDTuple::getDistinct(Context, None);
1228   EXPECT_EQ(nullptr, N->getElements().get());
1229   N->replaceElements(Elements);
1230   EXPECT_EQ(Elements, N->getElements().get());
1231   N->replaceElements(nullptr);
1232   EXPECT_EQ(nullptr, N->getElements().get());
1233
1234   DITypeRef VTableHolder = getCompositeType();
1235   EXPECT_EQ(nullptr, N->getVTableHolder());
1236   N->replaceVTableHolder(VTableHolder);
1237   EXPECT_EQ(VTableHolder, N->getVTableHolder());
1238   N->replaceVTableHolder(nullptr);
1239   EXPECT_EQ(nullptr, N->getVTableHolder());
1240
1241   auto *TemplateParams = MDTuple::getDistinct(Context, None);
1242   EXPECT_EQ(nullptr, N->getTemplateParams().get());
1243   N->replaceTemplateParams(TemplateParams);
1244   EXPECT_EQ(TemplateParams, N->getTemplateParams().get());
1245   N->replaceTemplateParams(nullptr);
1246   EXPECT_EQ(nullptr, N->getTemplateParams().get());
1247 }
1248
1249 typedef MetadataTest DISubroutineTypeTest;
1250
1251 TEST_F(DISubroutineTypeTest, get) {
1252   unsigned Flags = 1;
1253   MDTuple *TypeArray = getTuple();
1254
1255   auto *N = DISubroutineType::get(Context, Flags, TypeArray);
1256   EXPECT_EQ(dwarf::DW_TAG_subroutine_type, N->getTag());
1257   EXPECT_EQ(Flags, N->getFlags());
1258   EXPECT_EQ(TypeArray, N->getTypeArray().get());
1259   EXPECT_EQ(N, DISubroutineType::get(Context, Flags, TypeArray));
1260
1261   EXPECT_NE(N, DISubroutineType::get(Context, Flags + 1, TypeArray));
1262   EXPECT_NE(N, DISubroutineType::get(Context, Flags, getTuple()));
1263
1264   TempDISubroutineType Temp = N->clone();
1265   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1266
1267   // Test always-empty operands.
1268   EXPECT_EQ(nullptr, N->getScope());
1269   EXPECT_EQ(nullptr, N->getFile());
1270   EXPECT_EQ("", N->getName());
1271 }
1272
1273 typedef MetadataTest DIFileTest;
1274
1275 TEST_F(DIFileTest, get) {
1276   StringRef Filename = "file";
1277   StringRef Directory = "dir";
1278   auto *N = DIFile::get(Context, Filename, Directory);
1279
1280   EXPECT_EQ(dwarf::DW_TAG_file_type, N->getTag());
1281   EXPECT_EQ(Filename, N->getFilename());
1282   EXPECT_EQ(Directory, N->getDirectory());
1283   EXPECT_EQ(N, DIFile::get(Context, Filename, Directory));
1284
1285   EXPECT_NE(N, DIFile::get(Context, "other", Directory));
1286   EXPECT_NE(N, DIFile::get(Context, Filename, "other"));
1287
1288   TempDIFile Temp = N->clone();
1289   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1290 }
1291
1292 TEST_F(DIFileTest, ScopeGetFile) {
1293   // Ensure that DIScope::getFile() returns itself.
1294   DIScope *N = DIFile::get(Context, "file", "dir");
1295   EXPECT_EQ(N, N->getFile());
1296 }
1297
1298 typedef MetadataTest DICompileUnitTest;
1299
1300 TEST_F(DICompileUnitTest, get) {
1301   unsigned SourceLanguage = 1;
1302   DIFile *File = getFile();
1303   StringRef Producer = "some producer";
1304   bool IsOptimized = false;
1305   StringRef Flags = "flag after flag";
1306   unsigned RuntimeVersion = 2;
1307   StringRef SplitDebugFilename = "another/file";
1308   unsigned EmissionKind = 3;
1309   MDTuple *EnumTypes = getTuple();
1310   MDTuple *RetainedTypes = getTuple();
1311   MDTuple *Subprograms = getTuple();
1312   MDTuple *GlobalVariables = getTuple();
1313   MDTuple *ImportedEntities = getTuple();
1314   uint64_t DWOId = 0x10000000c0ffee;
1315   MDTuple *Macros = getTuple();
1316   auto *N = DICompileUnit::getDistinct(
1317       Context, SourceLanguage, File, Producer, IsOptimized, Flags,
1318       RuntimeVersion, SplitDebugFilename, EmissionKind, EnumTypes,
1319       RetainedTypes, Subprograms, GlobalVariables, ImportedEntities, Macros,
1320       DWOId);
1321
1322   EXPECT_EQ(dwarf::DW_TAG_compile_unit, N->getTag());
1323   EXPECT_EQ(SourceLanguage, N->getSourceLanguage());
1324   EXPECT_EQ(File, N->getFile());
1325   EXPECT_EQ(Producer, N->getProducer());
1326   EXPECT_EQ(IsOptimized, N->isOptimized());
1327   EXPECT_EQ(Flags, N->getFlags());
1328   EXPECT_EQ(RuntimeVersion, N->getRuntimeVersion());
1329   EXPECT_EQ(SplitDebugFilename, N->getSplitDebugFilename());
1330   EXPECT_EQ(EmissionKind, N->getEmissionKind());
1331   EXPECT_EQ(EnumTypes, N->getEnumTypes().get());
1332   EXPECT_EQ(RetainedTypes, N->getRetainedTypes().get());
1333   EXPECT_EQ(Subprograms, N->getSubprograms().get());
1334   EXPECT_EQ(GlobalVariables, N->getGlobalVariables().get());
1335   EXPECT_EQ(ImportedEntities, N->getImportedEntities().get());
1336   EXPECT_EQ(Macros, N->getMacros().get());
1337   EXPECT_EQ(DWOId, N->getDWOId());
1338
1339   TempDICompileUnit Temp = N->clone();
1340   EXPECT_EQ(dwarf::DW_TAG_compile_unit, Temp->getTag());
1341   EXPECT_EQ(SourceLanguage, Temp->getSourceLanguage());
1342   EXPECT_EQ(File, Temp->getFile());
1343   EXPECT_EQ(Producer, Temp->getProducer());
1344   EXPECT_EQ(IsOptimized, Temp->isOptimized());
1345   EXPECT_EQ(Flags, Temp->getFlags());
1346   EXPECT_EQ(RuntimeVersion, Temp->getRuntimeVersion());
1347   EXPECT_EQ(SplitDebugFilename, Temp->getSplitDebugFilename());
1348   EXPECT_EQ(EmissionKind, Temp->getEmissionKind());
1349   EXPECT_EQ(EnumTypes, Temp->getEnumTypes().get());
1350   EXPECT_EQ(RetainedTypes, Temp->getRetainedTypes().get());
1351   EXPECT_EQ(Subprograms, Temp->getSubprograms().get());
1352   EXPECT_EQ(GlobalVariables, Temp->getGlobalVariables().get());
1353   EXPECT_EQ(ImportedEntities, Temp->getImportedEntities().get());
1354   EXPECT_EQ(Macros, Temp->getMacros().get());
1355   EXPECT_EQ(DWOId, Temp->getDWOId());
1356
1357   auto *TempAddress = Temp.get();
1358   auto *Clone = MDNode::replaceWithPermanent(std::move(Temp));
1359   EXPECT_TRUE(Clone->isDistinct());
1360   EXPECT_EQ(TempAddress, Clone);
1361 }
1362
1363 TEST_F(DICompileUnitTest, replaceArrays) {
1364   unsigned SourceLanguage = 1;
1365   DIFile *File = getFile();
1366   StringRef Producer = "some producer";
1367   bool IsOptimized = false;
1368   StringRef Flags = "flag after flag";
1369   unsigned RuntimeVersion = 2;
1370   StringRef SplitDebugFilename = "another/file";
1371   unsigned EmissionKind = 3;
1372   MDTuple *EnumTypes = MDTuple::getDistinct(Context, None);
1373   MDTuple *RetainedTypes = MDTuple::getDistinct(Context, None);
1374   MDTuple *ImportedEntities = MDTuple::getDistinct(Context, None);
1375   uint64_t DWOId = 0xc0ffee;
1376   auto *N = DICompileUnit::getDistinct(
1377       Context, SourceLanguage, File, Producer, IsOptimized, Flags,
1378       RuntimeVersion, SplitDebugFilename, EmissionKind, EnumTypes,
1379       RetainedTypes, nullptr, nullptr, ImportedEntities, nullptr, DWOId);
1380
1381   auto *Subprograms = MDTuple::getDistinct(Context, None);
1382   EXPECT_EQ(nullptr, N->getSubprograms().get());
1383   N->replaceSubprograms(Subprograms);
1384   EXPECT_EQ(Subprograms, N->getSubprograms().get());
1385   N->replaceSubprograms(nullptr);
1386   EXPECT_EQ(nullptr, N->getSubprograms().get());
1387
1388   auto *GlobalVariables = MDTuple::getDistinct(Context, None);
1389   EXPECT_EQ(nullptr, N->getGlobalVariables().get());
1390   N->replaceGlobalVariables(GlobalVariables);
1391   EXPECT_EQ(GlobalVariables, N->getGlobalVariables().get());
1392   N->replaceGlobalVariables(nullptr);
1393   EXPECT_EQ(nullptr, N->getGlobalVariables().get());
1394
1395   auto *Macros = MDTuple::getDistinct(Context, None);
1396   EXPECT_EQ(nullptr, N->getMacros().get());
1397   N->replaceMacros(Macros);
1398   EXPECT_EQ(Macros, N->getMacros().get());
1399   N->replaceMacros(nullptr);
1400   EXPECT_EQ(nullptr, N->getMacros().get());
1401 }
1402
1403 typedef MetadataTest DISubprogramTest;
1404
1405 TEST_F(DISubprogramTest, get) {
1406   DIScopeRef Scope = getCompositeType();
1407   StringRef Name = "name";
1408   StringRef LinkageName = "linkage";
1409   DIFile *File = getFile();
1410   unsigned Line = 2;
1411   DISubroutineType *Type = getSubroutineType();
1412   bool IsLocalToUnit = false;
1413   bool IsDefinition = true;
1414   unsigned ScopeLine = 3;
1415   DITypeRef ContainingType = getCompositeType();
1416   unsigned Virtuality = 4;
1417   unsigned VirtualIndex = 5;
1418   unsigned Flags = 6;
1419   bool IsOptimized = false;
1420   MDTuple *TemplateParams = getTuple();
1421   DISubprogram *Declaration = getSubprogram();
1422   MDTuple *Variables = getTuple();
1423
1424   auto *N = DISubprogram::get(
1425       Context, Scope, Name, LinkageName, File, Line, Type, IsLocalToUnit,
1426       IsDefinition, ScopeLine, ContainingType, Virtuality, VirtualIndex, Flags,
1427       IsOptimized, TemplateParams, Declaration, Variables);
1428
1429   EXPECT_EQ(dwarf::DW_TAG_subprogram, N->getTag());
1430   EXPECT_EQ(Scope, N->getScope());
1431   EXPECT_EQ(Name, N->getName());
1432   EXPECT_EQ(LinkageName, N->getLinkageName());
1433   EXPECT_EQ(File, N->getFile());
1434   EXPECT_EQ(Line, N->getLine());
1435   EXPECT_EQ(Type, N->getType());
1436   EXPECT_EQ(IsLocalToUnit, N->isLocalToUnit());
1437   EXPECT_EQ(IsDefinition, N->isDefinition());
1438   EXPECT_EQ(ScopeLine, N->getScopeLine());
1439   EXPECT_EQ(ContainingType, N->getContainingType());
1440   EXPECT_EQ(Virtuality, N->getVirtuality());
1441   EXPECT_EQ(VirtualIndex, N->getVirtualIndex());
1442   EXPECT_EQ(Flags, N->getFlags());
1443   EXPECT_EQ(IsOptimized, N->isOptimized());
1444   EXPECT_EQ(TemplateParams, N->getTemplateParams().get());
1445   EXPECT_EQ(Declaration, N->getDeclaration());
1446   EXPECT_EQ(Variables, N->getVariables().get());
1447   EXPECT_EQ(N, DISubprogram::get(Context, Scope, Name, LinkageName, File, Line,
1448                                  Type, IsLocalToUnit, IsDefinition, ScopeLine,
1449                                  ContainingType, Virtuality, VirtualIndex,
1450                                  Flags, IsOptimized, TemplateParams,
1451                                  Declaration, Variables));
1452
1453   EXPECT_NE(N, DISubprogram::get(Context, getCompositeType(), Name, LinkageName,
1454                                  File, Line, Type, IsLocalToUnit, IsDefinition,
1455                                  ScopeLine, ContainingType, Virtuality,
1456                                  VirtualIndex, Flags, IsOptimized,
1457                                  TemplateParams, Declaration, Variables));
1458   EXPECT_NE(N, DISubprogram::get(Context, Scope, "other", LinkageName, File,
1459                                  Line, Type, IsLocalToUnit, IsDefinition,
1460                                  ScopeLine, ContainingType, Virtuality,
1461                                  VirtualIndex, Flags, IsOptimized,
1462                                  TemplateParams, Declaration, Variables));
1463   EXPECT_NE(N, DISubprogram::get(Context, Scope, Name, "other", File, Line,
1464                                  Type, IsLocalToUnit, IsDefinition, ScopeLine,
1465                                  ContainingType, Virtuality, VirtualIndex,
1466                                  Flags, IsOptimized, TemplateParams,
1467                                  Declaration, Variables));
1468   EXPECT_NE(N, DISubprogram::get(Context, Scope, Name, LinkageName, getFile(),
1469                                  Line, Type, IsLocalToUnit, IsDefinition,
1470                                  ScopeLine, ContainingType, Virtuality,
1471                                  VirtualIndex, Flags, IsOptimized,
1472                                  TemplateParams, Declaration, Variables));
1473   EXPECT_NE(N, DISubprogram::get(Context, Scope, Name, LinkageName, File,
1474                                  Line + 1, Type, IsLocalToUnit, IsDefinition,
1475                                  ScopeLine, ContainingType, Virtuality,
1476                                  VirtualIndex, Flags, IsOptimized,
1477                                  TemplateParams, Declaration, Variables));
1478   EXPECT_NE(N, DISubprogram::get(Context, Scope, Name, LinkageName, File, Line,
1479                                  getSubroutineType(), IsLocalToUnit,
1480                                  IsDefinition, ScopeLine, ContainingType,
1481                                  Virtuality, VirtualIndex, Flags, IsOptimized,
1482                                  TemplateParams, Declaration, Variables));
1483   EXPECT_NE(N, DISubprogram::get(Context, Scope, Name, LinkageName, File, Line,
1484                                  Type, !IsLocalToUnit, IsDefinition, ScopeLine,
1485                                  ContainingType, Virtuality, VirtualIndex,
1486                                  Flags, IsOptimized, TemplateParams,
1487                                  Declaration, Variables));
1488   EXPECT_NE(N, DISubprogram::get(Context, Scope, Name, LinkageName, File, Line,
1489                                  Type, IsLocalToUnit, !IsDefinition, ScopeLine,
1490                                  ContainingType, Virtuality, VirtualIndex,
1491                                  Flags, IsOptimized, TemplateParams,
1492                                  Declaration, Variables));
1493   EXPECT_NE(N, DISubprogram::get(Context, Scope, Name, LinkageName, File, Line,
1494                                  Type, IsLocalToUnit, IsDefinition,
1495                                  ScopeLine + 1, ContainingType, Virtuality,
1496                                  VirtualIndex, Flags, IsOptimized,
1497                                  TemplateParams, Declaration, Variables));
1498   EXPECT_NE(N, DISubprogram::get(Context, Scope, Name, LinkageName, File, Line,
1499                                  Type, IsLocalToUnit, IsDefinition, ScopeLine,
1500                                  getCompositeType(), Virtuality, VirtualIndex,
1501                                  Flags, IsOptimized, TemplateParams,
1502                                  Declaration, Variables));
1503   EXPECT_NE(N, DISubprogram::get(Context, Scope, Name, LinkageName, File, Line,
1504                                  Type, IsLocalToUnit, IsDefinition, ScopeLine,
1505                                  ContainingType, Virtuality + 1, VirtualIndex,
1506                                  Flags, IsOptimized, TemplateParams,
1507                                  Declaration, Variables));
1508   EXPECT_NE(N, DISubprogram::get(Context, Scope, Name, LinkageName, File, Line,
1509                                  Type, IsLocalToUnit, IsDefinition, ScopeLine,
1510                                  ContainingType, Virtuality, VirtualIndex + 1,
1511                                  Flags, IsOptimized, TemplateParams,
1512                                  Declaration, Variables));
1513   EXPECT_NE(N, DISubprogram::get(Context, Scope, Name, LinkageName, File, Line,
1514                                  Type, IsLocalToUnit, IsDefinition, ScopeLine,
1515                                  ContainingType, Virtuality, VirtualIndex,
1516                                  ~Flags, IsOptimized, TemplateParams,
1517                                  Declaration, Variables));
1518   EXPECT_NE(N, DISubprogram::get(Context, Scope, Name, LinkageName, File, Line,
1519                                  Type, IsLocalToUnit, IsDefinition, ScopeLine,
1520                                  ContainingType, Virtuality, VirtualIndex,
1521                                  Flags, !IsOptimized, TemplateParams,
1522                                  Declaration, Variables));
1523   EXPECT_NE(N,
1524             DISubprogram::get(Context, Scope, Name, LinkageName, File, Line,
1525                               Type, IsLocalToUnit, IsDefinition, ScopeLine,
1526                               ContainingType, Virtuality, VirtualIndex, Flags,
1527                               IsOptimized, getTuple(), Declaration, Variables));
1528   EXPECT_NE(N, DISubprogram::get(Context, Scope, Name, LinkageName, File, Line,
1529                                  Type, IsLocalToUnit, IsDefinition, ScopeLine,
1530                                  ContainingType, Virtuality, VirtualIndex,
1531                                  Flags, IsOptimized, TemplateParams,
1532                                  getSubprogram(), Variables));
1533   EXPECT_NE(N, DISubprogram::get(Context, Scope, Name, LinkageName, File, Line,
1534                                  Type, IsLocalToUnit, IsDefinition, ScopeLine,
1535                                  ContainingType, Virtuality, VirtualIndex,
1536                                  Flags, IsOptimized, TemplateParams,
1537                                  Declaration, getTuple()));
1538
1539   TempDISubprogram Temp = N->clone();
1540   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1541 }
1542
1543 typedef MetadataTest DILexicalBlockTest;
1544
1545 TEST_F(DILexicalBlockTest, get) {
1546   DILocalScope *Scope = getSubprogram();
1547   DIFile *File = getFile();
1548   unsigned Line = 5;
1549   unsigned Column = 8;
1550
1551   auto *N = DILexicalBlock::get(Context, Scope, File, Line, Column);
1552
1553   EXPECT_EQ(dwarf::DW_TAG_lexical_block, N->getTag());
1554   EXPECT_EQ(Scope, N->getScope());
1555   EXPECT_EQ(File, N->getFile());
1556   EXPECT_EQ(Line, N->getLine());
1557   EXPECT_EQ(Column, N->getColumn());
1558   EXPECT_EQ(N, DILexicalBlock::get(Context, Scope, File, Line, Column));
1559
1560   EXPECT_NE(N,
1561             DILexicalBlock::get(Context, getSubprogram(), File, Line, Column));
1562   EXPECT_NE(N, DILexicalBlock::get(Context, Scope, getFile(), Line, Column));
1563   EXPECT_NE(N, DILexicalBlock::get(Context, Scope, File, Line + 1, Column));
1564   EXPECT_NE(N, DILexicalBlock::get(Context, Scope, File, Line, Column + 1));
1565
1566   TempDILexicalBlock Temp = N->clone();
1567   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1568 }
1569
1570 TEST_F(DILexicalBlockTest, Overflow) {
1571   DISubprogram *SP = getSubprogram();
1572   DIFile *F = getFile();
1573   {
1574     auto *LB = DILexicalBlock::get(Context, SP, F, 2, 7);
1575     EXPECT_EQ(2u, LB->getLine());
1576     EXPECT_EQ(7u, LB->getColumn());
1577   }
1578   unsigned U16 = 1u << 16;
1579   {
1580     auto *LB = DILexicalBlock::get(Context, SP, F, UINT32_MAX, U16 - 1);
1581     EXPECT_EQ(UINT32_MAX, LB->getLine());
1582     EXPECT_EQ(U16 - 1, LB->getColumn());
1583   }
1584   {
1585     auto *LB = DILexicalBlock::get(Context, SP, F, UINT32_MAX, U16);
1586     EXPECT_EQ(UINT32_MAX, LB->getLine());
1587     EXPECT_EQ(0u, LB->getColumn());
1588   }
1589   {
1590     auto *LB = DILexicalBlock::get(Context, SP, F, UINT32_MAX, U16 + 1);
1591     EXPECT_EQ(UINT32_MAX, LB->getLine());
1592     EXPECT_EQ(0u, LB->getColumn());
1593   }
1594 }
1595
1596 typedef MetadataTest DILexicalBlockFileTest;
1597
1598 TEST_F(DILexicalBlockFileTest, get) {
1599   DILocalScope *Scope = getSubprogram();
1600   DIFile *File = getFile();
1601   unsigned Discriminator = 5;
1602
1603   auto *N = DILexicalBlockFile::get(Context, Scope, File, Discriminator);
1604
1605   EXPECT_EQ(dwarf::DW_TAG_lexical_block, N->getTag());
1606   EXPECT_EQ(Scope, N->getScope());
1607   EXPECT_EQ(File, N->getFile());
1608   EXPECT_EQ(Discriminator, N->getDiscriminator());
1609   EXPECT_EQ(N, DILexicalBlockFile::get(Context, Scope, File, Discriminator));
1610
1611   EXPECT_NE(N, DILexicalBlockFile::get(Context, getSubprogram(), File,
1612                                        Discriminator));
1613   EXPECT_NE(N,
1614             DILexicalBlockFile::get(Context, Scope, getFile(), Discriminator));
1615   EXPECT_NE(N,
1616             DILexicalBlockFile::get(Context, Scope, File, Discriminator + 1));
1617
1618   TempDILexicalBlockFile Temp = N->clone();
1619   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1620 }
1621
1622 typedef MetadataTest DINamespaceTest;
1623
1624 TEST_F(DINamespaceTest, get) {
1625   DIScope *Scope = getFile();
1626   DIFile *File = getFile();
1627   StringRef Name = "namespace";
1628   unsigned Line = 5;
1629
1630   auto *N = DINamespace::get(Context, Scope, File, Name, Line);
1631
1632   EXPECT_EQ(dwarf::DW_TAG_namespace, N->getTag());
1633   EXPECT_EQ(Scope, N->getScope());
1634   EXPECT_EQ(File, N->getFile());
1635   EXPECT_EQ(Name, N->getName());
1636   EXPECT_EQ(Line, N->getLine());
1637   EXPECT_EQ(N, DINamespace::get(Context, Scope, File, Name, Line));
1638
1639   EXPECT_NE(N, DINamespace::get(Context, getFile(), File, Name, Line));
1640   EXPECT_NE(N, DINamespace::get(Context, Scope, getFile(), Name, Line));
1641   EXPECT_NE(N, DINamespace::get(Context, Scope, File, "other", Line));
1642   EXPECT_NE(N, DINamespace::get(Context, Scope, File, Name, Line + 1));
1643
1644   TempDINamespace Temp = N->clone();
1645   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1646 }
1647
1648 typedef MetadataTest DIModuleTest;
1649
1650 TEST_F(DIModuleTest, get) {
1651   DIScope *Scope = getFile();
1652   StringRef Name = "module";
1653   StringRef ConfigMacro = "-DNDEBUG";
1654   StringRef Includes = "-I.";
1655   StringRef Sysroot = "/";
1656
1657   auto *N = DIModule::get(Context, Scope, Name, ConfigMacro, Includes, Sysroot);
1658
1659   EXPECT_EQ(dwarf::DW_TAG_module, N->getTag());
1660   EXPECT_EQ(Scope, N->getScope());
1661   EXPECT_EQ(Name, N->getName());
1662   EXPECT_EQ(ConfigMacro, N->getConfigurationMacros());
1663   EXPECT_EQ(Includes, N->getIncludePath());
1664   EXPECT_EQ(Sysroot, N->getISysRoot());
1665   EXPECT_EQ(N, DIModule::get(Context, Scope, Name,
1666                              ConfigMacro, Includes, Sysroot));
1667   EXPECT_NE(N, DIModule::get(Context, getFile(), Name,
1668                              ConfigMacro, Includes, Sysroot));
1669   EXPECT_NE(N, DIModule::get(Context, Scope, "other",
1670                              ConfigMacro, Includes, Sysroot));
1671   EXPECT_NE(N, DIModule::get(Context, Scope, Name,
1672                              "other", Includes, Sysroot));
1673   EXPECT_NE(N, DIModule::get(Context, Scope, Name,
1674                              ConfigMacro, "other", Sysroot));
1675   EXPECT_NE(N, DIModule::get(Context, Scope, Name,
1676                              ConfigMacro, Includes, "other"));
1677
1678   TempDIModule Temp = N->clone();
1679   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1680 }
1681
1682 typedef MetadataTest DITemplateTypeParameterTest;
1683
1684 TEST_F(DITemplateTypeParameterTest, get) {
1685   StringRef Name = "template";
1686   DITypeRef Type = getBasicType("basic");
1687
1688   auto *N = DITemplateTypeParameter::get(Context, Name, Type);
1689
1690   EXPECT_EQ(dwarf::DW_TAG_template_type_parameter, N->getTag());
1691   EXPECT_EQ(Name, N->getName());
1692   EXPECT_EQ(Type, N->getType());
1693   EXPECT_EQ(N, DITemplateTypeParameter::get(Context, Name, Type));
1694
1695   EXPECT_NE(N, DITemplateTypeParameter::get(Context, "other", Type));
1696   EXPECT_NE(N,
1697             DITemplateTypeParameter::get(Context, Name, getBasicType("other")));
1698
1699   TempDITemplateTypeParameter Temp = N->clone();
1700   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1701 }
1702
1703 typedef MetadataTest DITemplateValueParameterTest;
1704
1705 TEST_F(DITemplateValueParameterTest, get) {
1706   unsigned Tag = dwarf::DW_TAG_template_value_parameter;
1707   StringRef Name = "template";
1708   DITypeRef Type = getBasicType("basic");
1709   Metadata *Value = getConstantAsMetadata();
1710
1711   auto *N = DITemplateValueParameter::get(Context, Tag, Name, Type, Value);
1712   EXPECT_EQ(Tag, N->getTag());
1713   EXPECT_EQ(Name, N->getName());
1714   EXPECT_EQ(Type, N->getType());
1715   EXPECT_EQ(Value, N->getValue());
1716   EXPECT_EQ(N, DITemplateValueParameter::get(Context, Tag, Name, Type, Value));
1717
1718   EXPECT_NE(N, DITemplateValueParameter::get(
1719                    Context, dwarf::DW_TAG_GNU_template_template_param, Name,
1720                    Type, Value));
1721   EXPECT_NE(N,
1722             DITemplateValueParameter::get(Context, Tag, "other", Type, Value));
1723   EXPECT_NE(N, DITemplateValueParameter::get(Context, Tag, Name,
1724                                              getBasicType("other"), Value));
1725   EXPECT_NE(N, DITemplateValueParameter::get(Context, Tag, Name, Type,
1726                                              getConstantAsMetadata()));
1727
1728   TempDITemplateValueParameter Temp = N->clone();
1729   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1730 }
1731
1732 typedef MetadataTest DIGlobalVariableTest;
1733
1734 TEST_F(DIGlobalVariableTest, get) {
1735   DIScope *Scope = getSubprogram();
1736   StringRef Name = "name";
1737   StringRef LinkageName = "linkage";
1738   DIFile *File = getFile();
1739   unsigned Line = 5;
1740   DITypeRef Type = getDerivedType();
1741   bool IsLocalToUnit = false;
1742   bool IsDefinition = true;
1743   Constant *Variable = getConstant();
1744   DIDerivedType *StaticDataMemberDeclaration =
1745       cast<DIDerivedType>(getDerivedType());
1746
1747   auto *N = DIGlobalVariable::get(Context, Scope, Name, LinkageName, File, Line,
1748                                   Type, IsLocalToUnit, IsDefinition, Variable,
1749                                   StaticDataMemberDeclaration);
1750   EXPECT_EQ(dwarf::DW_TAG_variable, N->getTag());
1751   EXPECT_EQ(Scope, N->getScope());
1752   EXPECT_EQ(Name, N->getName());
1753   EXPECT_EQ(LinkageName, N->getLinkageName());
1754   EXPECT_EQ(File, N->getFile());
1755   EXPECT_EQ(Line, N->getLine());
1756   EXPECT_EQ(Type, N->getType());
1757   EXPECT_EQ(IsLocalToUnit, N->isLocalToUnit());
1758   EXPECT_EQ(IsDefinition, N->isDefinition());
1759   EXPECT_EQ(Variable, N->getVariable());
1760   EXPECT_EQ(StaticDataMemberDeclaration, N->getStaticDataMemberDeclaration());
1761   EXPECT_EQ(N, DIGlobalVariable::get(Context, Scope, Name, LinkageName, File,
1762                                      Line, Type, IsLocalToUnit, IsDefinition,
1763                                      Variable, StaticDataMemberDeclaration));
1764
1765   EXPECT_NE(N,
1766             DIGlobalVariable::get(Context, getSubprogram(), Name, LinkageName,
1767                                   File, Line, Type, IsLocalToUnit, IsDefinition,
1768                                   Variable, StaticDataMemberDeclaration));
1769   EXPECT_NE(N, DIGlobalVariable::get(Context, Scope, "other", LinkageName, File,
1770                                      Line, Type, IsLocalToUnit, IsDefinition,
1771                                      Variable, StaticDataMemberDeclaration));
1772   EXPECT_NE(N, DIGlobalVariable::get(Context, Scope, Name, "other", File, Line,
1773                                      Type, IsLocalToUnit, IsDefinition,
1774                                      Variable, StaticDataMemberDeclaration));
1775   EXPECT_NE(N,
1776             DIGlobalVariable::get(Context, Scope, Name, LinkageName, getFile(),
1777                                   Line, Type, IsLocalToUnit, IsDefinition,
1778                                   Variable, StaticDataMemberDeclaration));
1779   EXPECT_NE(N,
1780             DIGlobalVariable::get(Context, Scope, Name, LinkageName, File,
1781                                   Line + 1, Type, IsLocalToUnit, IsDefinition,
1782                                   Variable, StaticDataMemberDeclaration));
1783   EXPECT_NE(N,
1784             DIGlobalVariable::get(Context, Scope, Name, LinkageName, File, Line,
1785                                   getDerivedType(), IsLocalToUnit, IsDefinition,
1786                                   Variable, StaticDataMemberDeclaration));
1787   EXPECT_NE(N, DIGlobalVariable::get(Context, Scope, Name, LinkageName, File,
1788                                      Line, Type, !IsLocalToUnit, IsDefinition,
1789                                      Variable, StaticDataMemberDeclaration));
1790   EXPECT_NE(N, DIGlobalVariable::get(Context, Scope, Name, LinkageName, File,
1791                                      Line, Type, IsLocalToUnit, !IsDefinition,
1792                                      Variable, StaticDataMemberDeclaration));
1793   EXPECT_NE(N,
1794             DIGlobalVariable::get(Context, Scope, Name, LinkageName, File, Line,
1795                                   Type, IsLocalToUnit, IsDefinition,
1796                                   getConstant(), StaticDataMemberDeclaration));
1797   EXPECT_NE(N,
1798             DIGlobalVariable::get(Context, Scope, Name, LinkageName, File, Line,
1799                                   Type, IsLocalToUnit, IsDefinition, Variable,
1800                                   cast<DIDerivedType>(getDerivedType())));
1801
1802   TempDIGlobalVariable Temp = N->clone();
1803   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1804 }
1805
1806 typedef MetadataTest DILocalVariableTest;
1807
1808 TEST_F(DILocalVariableTest, get) {
1809   DILocalScope *Scope = getSubprogram();
1810   StringRef Name = "name";
1811   DIFile *File = getFile();
1812   unsigned Line = 5;
1813   DITypeRef Type = getDerivedType();
1814   unsigned Arg = 6;
1815   unsigned Flags = 7;
1816
1817   auto *N =
1818       DILocalVariable::get(Context, Scope, Name, File, Line, Type, Arg, Flags);
1819   EXPECT_TRUE(N->isParameter());
1820   EXPECT_EQ(Scope, N->getScope());
1821   EXPECT_EQ(Name, N->getName());
1822   EXPECT_EQ(File, N->getFile());
1823   EXPECT_EQ(Line, N->getLine());
1824   EXPECT_EQ(Type, N->getType());
1825   EXPECT_EQ(Arg, N->getArg());
1826   EXPECT_EQ(Flags, N->getFlags());
1827   EXPECT_EQ(N, DILocalVariable::get(Context, Scope, Name, File, Line, Type, Arg,
1828                                     Flags));
1829
1830   EXPECT_FALSE(
1831       DILocalVariable::get(Context, Scope, Name, File, Line, Type, 0, Flags)
1832           ->isParameter());
1833   EXPECT_NE(N, DILocalVariable::get(Context, getSubprogram(), Name, File, Line,
1834                                     Type, Arg, Flags));
1835   EXPECT_NE(N, DILocalVariable::get(Context, Scope, "other", File, Line, Type,
1836                                     Arg, Flags));
1837   EXPECT_NE(N, DILocalVariable::get(Context, Scope, Name, getFile(), Line, Type,
1838                                     Arg, Flags));
1839   EXPECT_NE(N, DILocalVariable::get(Context, Scope, Name, File, Line + 1, Type,
1840                                     Arg, Flags));
1841   EXPECT_NE(N, DILocalVariable::get(Context, Scope, Name, File, Line,
1842                                     getDerivedType(), Arg, Flags));
1843   EXPECT_NE(N, DILocalVariable::get(Context, Scope, Name, File, Line, Type,
1844                                     Arg + 1, Flags));
1845   EXPECT_NE(N, DILocalVariable::get(Context, Scope, Name, File, Line, Type, Arg,
1846                                     ~Flags));
1847
1848   TempDILocalVariable Temp = N->clone();
1849   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1850 }
1851
1852 TEST_F(DILocalVariableTest, getArg256) {
1853   EXPECT_EQ(255u, DILocalVariable::get(Context, getSubprogram(), "", getFile(),
1854                                        0, nullptr, 255, 0)
1855                       ->getArg());
1856   EXPECT_EQ(256u, DILocalVariable::get(Context, getSubprogram(), "", getFile(),
1857                                        0, nullptr, 256, 0)
1858                       ->getArg());
1859   EXPECT_EQ(257u, DILocalVariable::get(Context, getSubprogram(), "", getFile(),
1860                                        0, nullptr, 257, 0)
1861                       ->getArg());
1862   unsigned Max = UINT16_MAX;
1863   EXPECT_EQ(Max, DILocalVariable::get(Context, getSubprogram(), "", getFile(),
1864                                       0, nullptr, Max, 0)
1865                      ->getArg());
1866 }
1867
1868 typedef MetadataTest DIExpressionTest;
1869
1870 TEST_F(DIExpressionTest, get) {
1871   uint64_t Elements[] = {2, 6, 9, 78, 0};
1872   auto *N = DIExpression::get(Context, Elements);
1873   EXPECT_EQ(makeArrayRef(Elements), N->getElements());
1874   EXPECT_EQ(N, DIExpression::get(Context, Elements));
1875
1876   EXPECT_EQ(5u, N->getNumElements());
1877   EXPECT_EQ(2u, N->getElement(0));
1878   EXPECT_EQ(6u, N->getElement(1));
1879   EXPECT_EQ(9u, N->getElement(2));
1880   EXPECT_EQ(78u, N->getElement(3));
1881   EXPECT_EQ(0u, N->getElement(4));
1882
1883   TempDIExpression Temp = N->clone();
1884   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1885 }
1886
1887 TEST_F(DIExpressionTest, isValid) {
1888 #define EXPECT_VALID(...)                                                      \
1889   do {                                                                         \
1890     uint64_t Elements[] = {__VA_ARGS__};                                       \
1891     EXPECT_TRUE(DIExpression::get(Context, Elements)->isValid());              \
1892   } while (false)
1893 #define EXPECT_INVALID(...)                                                    \
1894   do {                                                                         \
1895     uint64_t Elements[] = {__VA_ARGS__};                                       \
1896     EXPECT_FALSE(DIExpression::get(Context, Elements)->isValid());             \
1897   } while (false)
1898
1899   // Empty expression should be valid.
1900   EXPECT_TRUE(DIExpression::get(Context, None));
1901
1902   // Valid constructions.
1903   EXPECT_VALID(dwarf::DW_OP_plus, 6);
1904   EXPECT_VALID(dwarf::DW_OP_deref);
1905   EXPECT_VALID(dwarf::DW_OP_bit_piece, 3, 7);
1906   EXPECT_VALID(dwarf::DW_OP_plus, 6, dwarf::DW_OP_deref);
1907   EXPECT_VALID(dwarf::DW_OP_deref, dwarf::DW_OP_plus, 6);
1908   EXPECT_VALID(dwarf::DW_OP_deref, dwarf::DW_OP_bit_piece, 3, 7);
1909   EXPECT_VALID(dwarf::DW_OP_deref, dwarf::DW_OP_plus, 6, dwarf::DW_OP_bit_piece, 3, 7);
1910
1911   // Invalid constructions.
1912   EXPECT_INVALID(~0u);
1913   EXPECT_INVALID(dwarf::DW_OP_plus);
1914   EXPECT_INVALID(dwarf::DW_OP_bit_piece);
1915   EXPECT_INVALID(dwarf::DW_OP_bit_piece, 3);
1916   EXPECT_INVALID(dwarf::DW_OP_bit_piece, 3, 7, dwarf::DW_OP_plus, 3);
1917   EXPECT_INVALID(dwarf::DW_OP_bit_piece, 3, 7, dwarf::DW_OP_deref);
1918
1919 #undef EXPECT_VALID
1920 #undef EXPECT_INVALID
1921 }
1922
1923 typedef MetadataTest DIObjCPropertyTest;
1924
1925 TEST_F(DIObjCPropertyTest, get) {
1926   StringRef Name = "name";
1927   DIFile *File = getFile();
1928   unsigned Line = 5;
1929   StringRef GetterName = "getter";
1930   StringRef SetterName = "setter";
1931   unsigned Attributes = 7;
1932   DITypeRef Type = getBasicType("basic");
1933
1934   auto *N = DIObjCProperty::get(Context, Name, File, Line, GetterName,
1935                                 SetterName, Attributes, Type);
1936
1937   EXPECT_EQ(dwarf::DW_TAG_APPLE_property, N->getTag());
1938   EXPECT_EQ(Name, N->getName());
1939   EXPECT_EQ(File, N->getFile());
1940   EXPECT_EQ(Line, N->getLine());
1941   EXPECT_EQ(GetterName, N->getGetterName());
1942   EXPECT_EQ(SetterName, N->getSetterName());
1943   EXPECT_EQ(Attributes, N->getAttributes());
1944   EXPECT_EQ(Type, N->getType());
1945   EXPECT_EQ(N, DIObjCProperty::get(Context, Name, File, Line, GetterName,
1946                                    SetterName, Attributes, Type));
1947
1948   EXPECT_NE(N, DIObjCProperty::get(Context, "other", File, Line, GetterName,
1949                                    SetterName, Attributes, Type));
1950   EXPECT_NE(N, DIObjCProperty::get(Context, Name, getFile(), Line, GetterName,
1951                                    SetterName, Attributes, Type));
1952   EXPECT_NE(N, DIObjCProperty::get(Context, Name, File, Line + 1, GetterName,
1953                                    SetterName, Attributes, Type));
1954   EXPECT_NE(N, DIObjCProperty::get(Context, Name, File, Line, "other",
1955                                    SetterName, Attributes, Type));
1956   EXPECT_NE(N, DIObjCProperty::get(Context, Name, File, Line, GetterName,
1957                                    "other", Attributes, Type));
1958   EXPECT_NE(N, DIObjCProperty::get(Context, Name, File, Line, GetterName,
1959                                    SetterName, Attributes + 1, Type));
1960   EXPECT_NE(N, DIObjCProperty::get(Context, Name, File, Line, GetterName,
1961                                    SetterName, Attributes,
1962                                    getBasicType("other")));
1963
1964   TempDIObjCProperty Temp = N->clone();
1965   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
1966 }
1967
1968 typedef MetadataTest DIImportedEntityTest;
1969
1970 TEST_F(DIImportedEntityTest, get) {
1971   unsigned Tag = dwarf::DW_TAG_imported_module;
1972   DIScope *Scope = getSubprogram();
1973   DINodeRef Entity = getCompositeType();
1974   unsigned Line = 5;
1975   StringRef Name = "name";
1976
1977   auto *N = DIImportedEntity::get(Context, Tag, Scope, Entity, Line, Name);
1978
1979   EXPECT_EQ(Tag, N->getTag());
1980   EXPECT_EQ(Scope, N->getScope());
1981   EXPECT_EQ(Entity, N->getEntity());
1982   EXPECT_EQ(Line, N->getLine());
1983   EXPECT_EQ(Name, N->getName());
1984   EXPECT_EQ(N, DIImportedEntity::get(Context, Tag, Scope, Entity, Line, Name));
1985
1986   EXPECT_NE(N,
1987             DIImportedEntity::get(Context, dwarf::DW_TAG_imported_declaration,
1988                                   Scope, Entity, Line, Name));
1989   EXPECT_NE(N, DIImportedEntity::get(Context, Tag, getSubprogram(), Entity,
1990                                      Line, Name));
1991   EXPECT_NE(N, DIImportedEntity::get(Context, Tag, Scope, getCompositeType(),
1992                                      Line, Name));
1993   EXPECT_NE(N,
1994             DIImportedEntity::get(Context, Tag, Scope, Entity, Line + 1, Name));
1995   EXPECT_NE(N,
1996             DIImportedEntity::get(Context, Tag, Scope, Entity, Line, "other"));
1997
1998   TempDIImportedEntity Temp = N->clone();
1999   EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));
2000 }
2001
2002 typedef MetadataTest MetadataAsValueTest;
2003
2004 TEST_F(MetadataAsValueTest, MDNode) {
2005   MDNode *N = MDNode::get(Context, None);
2006   auto *V = MetadataAsValue::get(Context, N);
2007   EXPECT_TRUE(V->getType()->isMetadataTy());
2008   EXPECT_EQ(N, V->getMetadata());
2009
2010   auto *V2 = MetadataAsValue::get(Context, N);
2011   EXPECT_EQ(V, V2);
2012 }
2013
2014 TEST_F(MetadataAsValueTest, MDNodeMDNode) {
2015   MDNode *N = MDNode::get(Context, None);
2016   Metadata *Ops[] = {N};
2017   MDNode *N2 = MDNode::get(Context, Ops);
2018   auto *V = MetadataAsValue::get(Context, N2);
2019   EXPECT_TRUE(V->getType()->isMetadataTy());
2020   EXPECT_EQ(N2, V->getMetadata());
2021
2022   auto *V2 = MetadataAsValue::get(Context, N2);
2023   EXPECT_EQ(V, V2);
2024
2025   auto *V3 = MetadataAsValue::get(Context, N);
2026   EXPECT_TRUE(V3->getType()->isMetadataTy());
2027   EXPECT_NE(V, V3);
2028   EXPECT_EQ(N, V3->getMetadata());
2029 }
2030
2031 TEST_F(MetadataAsValueTest, MDNodeConstant) {
2032   auto *C = ConstantInt::getTrue(Context);
2033   auto *MD = ConstantAsMetadata::get(C);
2034   Metadata *Ops[] = {MD};
2035   auto *N = MDNode::get(Context, Ops);
2036
2037   auto *V = MetadataAsValue::get(Context, MD);
2038   EXPECT_TRUE(V->getType()->isMetadataTy());
2039   EXPECT_EQ(MD, V->getMetadata());
2040
2041   auto *V2 = MetadataAsValue::get(Context, N);
2042   EXPECT_EQ(MD, V2->getMetadata());
2043   EXPECT_EQ(V, V2);
2044 }
2045
2046 typedef MetadataTest ValueAsMetadataTest;
2047
2048 TEST_F(ValueAsMetadataTest, UpdatesOnRAUW) {
2049   Type *Ty = Type::getInt1PtrTy(Context);
2050   std::unique_ptr<GlobalVariable> GV0(
2051       new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
2052   auto *MD = ValueAsMetadata::get(GV0.get());
2053   EXPECT_TRUE(MD->getValue() == GV0.get());
2054   ASSERT_TRUE(GV0->use_empty());
2055
2056   std::unique_ptr<GlobalVariable> GV1(
2057       new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
2058   GV0->replaceAllUsesWith(GV1.get());
2059   EXPECT_TRUE(MD->getValue() == GV1.get());
2060 }
2061
2062 TEST_F(ValueAsMetadataTest, CollidingDoubleUpdates) {
2063   // Create a constant.
2064   ConstantAsMetadata *CI = ConstantAsMetadata::get(
2065       ConstantInt::get(getGlobalContext(), APInt(8, 0)));
2066
2067   // Create a temporary to prevent nodes from resolving.
2068   auto Temp = MDTuple::getTemporary(Context, None);
2069
2070   // When the first operand of N1 gets reset to nullptr, it'll collide with N2.
2071   Metadata *Ops1[] = {CI, CI, Temp.get()};
2072   Metadata *Ops2[] = {nullptr, CI, Temp.get()};
2073
2074   auto *N1 = MDTuple::get(Context, Ops1);
2075   auto *N2 = MDTuple::get(Context, Ops2);
2076   ASSERT_NE(N1, N2);
2077
2078   // Tell metadata that the constant is getting deleted.
2079   //
2080   // After this, N1 will be invalid, so don't touch it.
2081   ValueAsMetadata::handleDeletion(CI->getValue());
2082   EXPECT_EQ(nullptr, N2->getOperand(0));
2083   EXPECT_EQ(nullptr, N2->getOperand(1));
2084   EXPECT_EQ(Temp.get(), N2->getOperand(2));
2085
2086   // Clean up Temp for teardown.
2087   Temp->replaceAllUsesWith(nullptr);
2088 }
2089
2090 typedef MetadataTest TrackingMDRefTest;
2091
2092 TEST_F(TrackingMDRefTest, UpdatesOnRAUW) {
2093   Type *Ty = Type::getInt1PtrTy(Context);
2094   std::unique_ptr<GlobalVariable> GV0(
2095       new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
2096   TypedTrackingMDRef<ValueAsMetadata> MD(ValueAsMetadata::get(GV0.get()));
2097   EXPECT_TRUE(MD->getValue() == GV0.get());
2098   ASSERT_TRUE(GV0->use_empty());
2099
2100   std::unique_ptr<GlobalVariable> GV1(
2101       new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
2102   GV0->replaceAllUsesWith(GV1.get());
2103   EXPECT_TRUE(MD->getValue() == GV1.get());
2104
2105   // Reset it, so we don't inadvertently test deletion.
2106   MD.reset();
2107 }
2108
2109 TEST_F(TrackingMDRefTest, UpdatesOnDeletion) {
2110   Type *Ty = Type::getInt1PtrTy(Context);
2111   std::unique_ptr<GlobalVariable> GV(
2112       new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
2113   TypedTrackingMDRef<ValueAsMetadata> MD(ValueAsMetadata::get(GV.get()));
2114   EXPECT_TRUE(MD->getValue() == GV.get());
2115   ASSERT_TRUE(GV->use_empty());
2116
2117   GV.reset();
2118   EXPECT_TRUE(!MD);
2119 }
2120
2121 TEST(NamedMDNodeTest, Search) {
2122   LLVMContext Context;
2123   ConstantAsMetadata *C =
2124       ConstantAsMetadata::get(ConstantInt::get(Type::getInt32Ty(Context), 1));
2125   ConstantAsMetadata *C2 =
2126       ConstantAsMetadata::get(ConstantInt::get(Type::getInt32Ty(Context), 2));
2127
2128   Metadata *const V = C;
2129   Metadata *const V2 = C2;
2130   MDNode *n = MDNode::get(Context, V);
2131   MDNode *n2 = MDNode::get(Context, V2);
2132
2133   Module M("MyModule", Context);
2134   const char *Name = "llvm.NMD1";
2135   NamedMDNode *NMD = M.getOrInsertNamedMetadata(Name);
2136   NMD->addOperand(n);
2137   NMD->addOperand(n2);
2138
2139   std::string Str;
2140   raw_string_ostream oss(Str);
2141   NMD->print(oss);
2142   EXPECT_STREQ("!llvm.NMD1 = !{!0, !1}\n",
2143                oss.str().c_str());
2144 }
2145
2146 typedef MetadataTest FunctionAttachmentTest;
2147 TEST_F(FunctionAttachmentTest, setMetadata) {
2148   Function *F = getFunction("foo");
2149   ASSERT_FALSE(F->hasMetadata());
2150   EXPECT_EQ(nullptr, F->getMetadata(LLVMContext::MD_dbg));
2151   EXPECT_EQ(nullptr, F->getMetadata("dbg"));
2152   EXPECT_EQ(nullptr, F->getMetadata("other"));
2153
2154   DISubprogram *SP1 = getSubprogram();
2155   DISubprogram *SP2 = getSubprogram();
2156   ASSERT_NE(SP1, SP2);
2157
2158   F->setMetadata("dbg", SP1);
2159   EXPECT_TRUE(F->hasMetadata());
2160   EXPECT_EQ(SP1, F->getMetadata(LLVMContext::MD_dbg));
2161   EXPECT_EQ(SP1, F->getMetadata("dbg"));
2162   EXPECT_EQ(nullptr, F->getMetadata("other"));
2163
2164   F->setMetadata(LLVMContext::MD_dbg, SP2);
2165   EXPECT_TRUE(F->hasMetadata());
2166   EXPECT_EQ(SP2, F->getMetadata(LLVMContext::MD_dbg));
2167   EXPECT_EQ(SP2, F->getMetadata("dbg"));
2168   EXPECT_EQ(nullptr, F->getMetadata("other"));
2169
2170   F->setMetadata("dbg", nullptr);
2171   EXPECT_FALSE(F->hasMetadata());
2172   EXPECT_EQ(nullptr, F->getMetadata(LLVMContext::MD_dbg));
2173   EXPECT_EQ(nullptr, F->getMetadata("dbg"));
2174   EXPECT_EQ(nullptr, F->getMetadata("other"));
2175
2176   MDTuple *T1 = getTuple();
2177   MDTuple *T2 = getTuple();
2178   ASSERT_NE(T1, T2);
2179
2180   F->setMetadata("other1", T1);
2181   F->setMetadata("other2", T2);
2182   EXPECT_TRUE(F->hasMetadata());
2183   EXPECT_EQ(T1, F->getMetadata("other1"));
2184   EXPECT_EQ(T2, F->getMetadata("other2"));
2185   EXPECT_EQ(nullptr, F->getMetadata("dbg"));
2186
2187   F->setMetadata("other1", T2);
2188   F->setMetadata("other2", T1);
2189   EXPECT_EQ(T2, F->getMetadata("other1"));
2190   EXPECT_EQ(T1, F->getMetadata("other2"));
2191
2192   F->setMetadata("other1", nullptr);
2193   F->setMetadata("other2", nullptr);
2194   EXPECT_FALSE(F->hasMetadata());
2195   EXPECT_EQ(nullptr, F->getMetadata("other1"));
2196   EXPECT_EQ(nullptr, F->getMetadata("other2"));
2197 }
2198
2199 TEST_F(FunctionAttachmentTest, getAll) {
2200   Function *F = getFunction("foo");
2201
2202   MDTuple *T1 = getTuple();
2203   MDTuple *T2 = getTuple();
2204   MDTuple *P = getTuple();
2205   DISubprogram *SP = getSubprogram();
2206
2207   F->setMetadata("other1", T2);
2208   F->setMetadata(LLVMContext::MD_dbg, SP);
2209   F->setMetadata("other2", T1);
2210   F->setMetadata(LLVMContext::MD_prof, P);
2211   F->setMetadata("other2", T2);
2212   F->setMetadata("other1", T1);
2213
2214   SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
2215   F->getAllMetadata(MDs);
2216   ASSERT_EQ(4u, MDs.size());
2217   EXPECT_EQ(LLVMContext::MD_dbg, MDs[0].first);
2218   EXPECT_EQ(LLVMContext::MD_prof, MDs[1].first);
2219   EXPECT_EQ(Context.getMDKindID("other1"), MDs[2].first);
2220   EXPECT_EQ(Context.getMDKindID("other2"), MDs[3].first);
2221   EXPECT_EQ(SP, MDs[0].second);
2222   EXPECT_EQ(P, MDs[1].second);
2223   EXPECT_EQ(T1, MDs[2].second);
2224   EXPECT_EQ(T2, MDs[3].second);
2225 }
2226
2227 TEST_F(FunctionAttachmentTest, dropUnknownMetadata) {
2228   Function *F = getFunction("foo");
2229
2230   MDTuple *T1 = getTuple();
2231   MDTuple *T2 = getTuple();
2232   MDTuple *P = getTuple();
2233   DISubprogram *SP = getSubprogram();
2234
2235   F->setMetadata("other1", T1);
2236   F->setMetadata(LLVMContext::MD_dbg, SP);
2237   F->setMetadata("other2", T2);
2238   F->setMetadata(LLVMContext::MD_prof, P);
2239
2240   unsigned Known[] = {Context.getMDKindID("other2"), LLVMContext::MD_prof};
2241   F->dropUnknownMetadata(Known);
2242
2243   EXPECT_EQ(T2, F->getMetadata("other2"));
2244   EXPECT_EQ(P, F->getMetadata(LLVMContext::MD_prof));
2245   EXPECT_EQ(nullptr, F->getMetadata("other1"));
2246   EXPECT_EQ(nullptr, F->getMetadata(LLVMContext::MD_dbg));
2247
2248   F->setMetadata("other2", nullptr);
2249   F->setMetadata(LLVMContext::MD_prof, nullptr);
2250   EXPECT_FALSE(F->hasMetadata());
2251 }
2252
2253 TEST_F(FunctionAttachmentTest, Verifier) {
2254   Function *F = getFunction("foo");
2255   F->setMetadata("attach", getTuple());
2256
2257   // Confirm this has no body.
2258   ASSERT_TRUE(F->empty());
2259
2260   // Functions without a body cannot have metadata attachments (they also can't
2261   // be verified directly, so check that the module fails to verify).
2262   EXPECT_TRUE(verifyModule(*F->getParent()));
2263
2264   // Functions with a body can.
2265   (void)new UnreachableInst(Context, BasicBlock::Create(Context, "bb", F));
2266   EXPECT_FALSE(verifyModule(*F->getParent()));
2267   EXPECT_FALSE(verifyFunction(*F));
2268 }
2269
2270 TEST_F(FunctionAttachmentTest, EntryCount) {
2271   Function *F = getFunction("foo");
2272   EXPECT_FALSE(F->getEntryCount().hasValue());
2273   F->setEntryCount(12304);
2274   EXPECT_TRUE(F->getEntryCount().hasValue());
2275   EXPECT_EQ(12304u, *F->getEntryCount());
2276 }
2277
2278 TEST_F(FunctionAttachmentTest, SubprogramAttachment) {
2279   Function *F = getFunction("foo");
2280   DISubprogram *SP = getSubprogram();
2281   F->setSubprogram(SP);
2282
2283   // Note that the static_cast confirms that F->getSubprogram() actually
2284   // returns an DISubprogram.
2285   EXPECT_EQ(SP, static_cast<DISubprogram *>(F->getSubprogram()));
2286   EXPECT_EQ(SP, F->getMetadata("dbg"));
2287   EXPECT_EQ(SP, F->getMetadata(LLVMContext::MD_dbg));
2288 }
2289
2290 }