1 //===- llvm/unittest/IR/Metadata.cpp - Metadata unit tests ----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/ADT/STLExtras.h"
11 #include "llvm/IR/Constants.h"
12 #include "llvm/IR/Instructions.h"
13 #include "llvm/IR/LLVMContext.h"
14 #include "llvm/IR/Metadata.h"
15 #include "llvm/IR/Module.h"
16 #include "llvm/IR/Type.h"
17 #include "llvm/Support/raw_ostream.h"
18 #include "gtest/gtest.h"
23 TEST(ContextAndReplaceableUsesTest, FromContext) {
25 ContextAndReplaceableUses CRU(Context);
26 EXPECT_EQ(&Context, &CRU.getContext());
27 EXPECT_FALSE(CRU.hasReplaceableUses());
28 EXPECT_FALSE(CRU.getReplaceableUses());
31 TEST(ContextAndReplaceableUsesTest, FromReplaceableUses) {
33 ContextAndReplaceableUses CRU(make_unique<ReplaceableMetadataImpl>(Context));
34 EXPECT_EQ(&Context, &CRU.getContext());
35 EXPECT_TRUE(CRU.hasReplaceableUses());
36 EXPECT_TRUE(CRU.getReplaceableUses());
39 TEST(ContextAndReplaceableUsesTest, makeReplaceable) {
41 ContextAndReplaceableUses CRU(Context);
42 CRU.makeReplaceable(make_unique<ReplaceableMetadataImpl>(Context));
43 EXPECT_EQ(&Context, &CRU.getContext());
44 EXPECT_TRUE(CRU.hasReplaceableUses());
45 EXPECT_TRUE(CRU.getReplaceableUses());
48 TEST(ContextAndReplaceableUsesTest, takeReplaceableUses) {
50 auto ReplaceableUses = make_unique<ReplaceableMetadataImpl>(Context);
51 auto *Ptr = ReplaceableUses.get();
52 ContextAndReplaceableUses CRU(std::move(ReplaceableUses));
53 ReplaceableUses = CRU.takeReplaceableUses();
54 EXPECT_EQ(&Context, &CRU.getContext());
55 EXPECT_FALSE(CRU.hasReplaceableUses());
56 EXPECT_FALSE(CRU.getReplaceableUses());
57 EXPECT_EQ(Ptr, ReplaceableUses.get());
60 class MetadataTest : public testing::Test {
63 MDNode *getNode() { return MDNode::get(Context, None); }
64 MDNode *getNode(Metadata *MD) { return MDNode::get(Context, MD); }
65 MDNode *getNode(Metadata *MD1, Metadata *MD2) {
66 Metadata *MDs[] = {MD1, MD2};
67 return MDNode::get(Context, MDs);
70 typedef MetadataTest MDStringTest;
72 // Test that construction of MDString with different value produces different
73 // MDString objects, even with the same string pointer and nulls in the string.
74 TEST_F(MDStringTest, CreateDifferent) {
75 char x[3] = { 'f', 0, 'A' };
76 MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
78 MDString *s2 = MDString::get(Context, StringRef(&x[0], 3));
82 // Test that creation of MDStrings with the same string contents produces the
83 // same MDString object, even with different pointers.
84 TEST_F(MDStringTest, CreateSame) {
85 char x[4] = { 'a', 'b', 'c', 'X' };
86 char y[4] = { 'a', 'b', 'c', 'Y' };
88 MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
89 MDString *s2 = MDString::get(Context, StringRef(&y[0], 3));
93 // Test that MDString prints out the string we fed it.
94 TEST_F(MDStringTest, PrintingSimple) {
95 char *str = new char[13];
96 strncpy(str, "testing 1 2 3", 13);
97 MDString *s = MDString::get(Context, StringRef(str, 13));
98 strncpy(str, "aaaaaaaaaaaaa", 13);
102 raw_string_ostream oss(Str);
104 EXPECT_STREQ("!\"testing 1 2 3\"", oss.str().c_str());
107 // Test printing of MDString with non-printable characters.
108 TEST_F(MDStringTest, PrintingComplex) {
109 char str[5] = {0, '\n', '"', '\\', (char)-1};
110 MDString *s = MDString::get(Context, StringRef(str+0, 5));
112 raw_string_ostream oss(Str);
114 EXPECT_STREQ("!\"\\00\\0A\\22\\5C\\FF\"", oss.str().c_str());
117 typedef MetadataTest MDNodeTest;
119 // Test the two constructors, and containing other Constants.
120 TEST_F(MDNodeTest, Simple) {
121 char x[3] = { 'a', 'b', 'c' };
122 char y[3] = { '1', '2', '3' };
124 MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
125 MDString *s2 = MDString::get(Context, StringRef(&y[0], 3));
126 ConstantAsMetadata *CI = ConstantAsMetadata::get(
127 ConstantInt::get(getGlobalContext(), APInt(8, 0)));
129 std::vector<Metadata *> V;
134 MDNode *n1 = MDNode::get(Context, V);
135 Metadata *const c1 = n1;
136 MDNode *n2 = MDNode::get(Context, c1);
137 Metadata *const c2 = n2;
138 MDNode *n3 = MDNode::get(Context, V);
139 MDNode *n4 = MDNode::getIfExists(Context, V);
140 MDNode *n5 = MDNode::getIfExists(Context, c1);
141 MDNode *n6 = MDNode::getIfExists(Context, c2);
146 EXPECT_EQ(n6, (Metadata *)nullptr);
148 EXPECT_EQ(3u, n1->getNumOperands());
149 EXPECT_EQ(s1, n1->getOperand(0));
150 EXPECT_EQ(CI, n1->getOperand(1));
151 EXPECT_EQ(s2, n1->getOperand(2));
153 EXPECT_EQ(1u, n2->getNumOperands());
154 EXPECT_EQ(n1, n2->getOperand(0));
157 TEST_F(MDNodeTest, Delete) {
158 Constant *C = ConstantInt::get(Type::getInt32Ty(getGlobalContext()), 1);
159 Instruction *I = new BitCastInst(C, Type::getInt32Ty(getGlobalContext()));
161 Metadata *const V = LocalAsMetadata::get(I);
162 MDNode *n = MDNode::get(Context, V);
163 TrackingMDRef wvh(n);
170 TEST_F(MDNodeTest, SelfReference) {
174 MDNode *Temp = MDNode::getTemporary(Context, None);
175 Metadata *Args[] = {Temp};
176 MDNode *Self = MDNode::get(Context, Args);
177 Self->replaceOperandWith(0, Self);
178 MDNode::deleteTemporary(Temp);
179 ASSERT_EQ(Self, Self->getOperand(0));
181 // Self-references should be distinct, so MDNode::get() should grab a
182 // uniqued node that references Self, not Self.
184 MDNode *Ref1 = MDNode::get(Context, Args);
185 MDNode *Ref2 = MDNode::get(Context, Args);
186 EXPECT_NE(Self, Ref1);
187 EXPECT_EQ(Ref1, Ref2);
193 MDNode *Temp = MDNode::getTemporary(Context, None);
194 Metadata *Args[] = {Temp, MDNode::get(Context, None)};
195 MDNode *Self = MDNode::get(Context, Args);
196 Self->replaceOperandWith(0, Self);
197 MDNode::deleteTemporary(Temp);
198 ASSERT_EQ(Self, Self->getOperand(0));
200 // Self-references should be distinct, so MDNode::get() should grab a
201 // uniqued node that references Self, not Self itself.
203 MDNode *Ref1 = MDNode::get(Context, Args);
204 MDNode *Ref2 = MDNode::get(Context, Args);
205 EXPECT_NE(Self, Ref1);
206 EXPECT_EQ(Ref1, Ref2);
210 TEST_F(MDNodeTest, Print) {
211 Constant *C = ConstantInt::get(Type::getInt32Ty(Context), 7);
212 MDString *S = MDString::get(Context, "foo");
213 MDNode *N0 = getNode();
214 MDNode *N1 = getNode(N0);
215 MDNode *N2 = getNode(N0, N1);
217 Metadata *Args[] = {ConstantAsMetadata::get(C), S, nullptr, N0, N1, N2};
218 MDNode *N = MDNode::get(Context, Args);
220 std::string Expected;
222 raw_string_ostream OS(Expected);
224 C->printAsOperand(OS);
226 S->printAsOperand(OS);
228 MDNode *Nodes[] = {N0, N1, N2};
229 for (auto *Node : Nodes)
230 OS << ", <" << (void *)Node << ">";
236 raw_string_ostream OS(Actual);
240 EXPECT_EQ(Expected, Actual);
243 TEST_F(MDNodeTest, NullOperand) {
245 MDNode *Empty = MDNode::get(Context, None);
247 // metadata !{metadata !{}}
248 Metadata *Ops[] = {Empty};
249 MDNode *N = MDNode::get(Context, Ops);
250 ASSERT_EQ(Empty, N->getOperand(0));
252 // metadata !{metadata !{}} => metadata !{null}
253 N->replaceOperandWith(0, nullptr);
254 ASSERT_EQ(nullptr, N->getOperand(0));
258 MDNode *NullOp = MDNode::get(Context, Ops);
259 ASSERT_EQ(nullptr, NullOp->getOperand(0));
260 EXPECT_EQ(N, NullOp);
263 TEST_F(MDNodeTest, DistinctOnUniquingCollision) {
265 MDNode *Empty = MDNode::get(Context, None);
266 ASSERT_TRUE(Empty->isResolved());
267 EXPECT_FALSE(Empty->isDistinct());
270 Metadata *Wrapped1Ops[] = {Empty};
271 MDNode *Wrapped1 = MDNode::get(Context, Wrapped1Ops);
272 ASSERT_EQ(Empty, Wrapped1->getOperand(0));
273 ASSERT_TRUE(Wrapped1->isResolved());
274 EXPECT_FALSE(Wrapped1->isDistinct());
277 Metadata *Wrapped2Ops[] = {Wrapped1};
278 MDNode *Wrapped2 = MDNode::get(Context, Wrapped2Ops);
279 ASSERT_EQ(Wrapped1, Wrapped2->getOperand(0));
280 ASSERT_TRUE(Wrapped2->isResolved());
281 EXPECT_FALSE(Wrapped2->isDistinct());
283 // !{!{!{}}} => !{!{}}
284 Wrapped2->replaceOperandWith(0, Empty);
285 ASSERT_EQ(Empty, Wrapped2->getOperand(0));
286 EXPECT_TRUE(Wrapped2->isDistinct());
287 EXPECT_FALSE(Wrapped1->isDistinct());
290 TEST_F(MDNodeTest, getDistinct) {
292 MDNode *Empty = MDNode::get(Context, None);
293 ASSERT_TRUE(Empty->isResolved());
294 ASSERT_FALSE(Empty->isDistinct());
295 ASSERT_EQ(Empty, MDNode::get(Context, None));
298 MDNode *Distinct1 = MDNode::getDistinct(Context, None);
299 MDNode *Distinct2 = MDNode::getDistinct(Context, None);
300 EXPECT_TRUE(Distinct1->isResolved());
301 EXPECT_TRUE(Distinct2->isDistinct());
302 EXPECT_NE(Empty, Distinct1);
303 EXPECT_NE(Empty, Distinct2);
304 EXPECT_NE(Distinct1, Distinct2);
307 ASSERT_EQ(Empty, MDNode::get(Context, None));
310 TEST_F(MDNodeTest, isUniqued) {
311 MDNode *U = MDTuple::get(Context, None);
312 MDNode *D = MDTuple::getDistinct(Context, None);
313 MDNode *T = MDTuple::getTemporary(Context, None);
314 EXPECT_TRUE(U->isUniqued());
315 EXPECT_FALSE(D->isUniqued());
316 EXPECT_FALSE(T->isUniqued());
317 MDNode::deleteTemporary(T);
320 TEST_F(MDNodeTest, isDistinct) {
321 MDNode *U = MDTuple::get(Context, None);
322 MDNode *D = MDTuple::getDistinct(Context, None);
323 MDNode *T = MDTuple::getTemporary(Context, None);
324 EXPECT_FALSE(U->isDistinct());
325 EXPECT_TRUE(D->isDistinct());
326 EXPECT_FALSE(T->isDistinct());
327 MDNode::deleteTemporary(T);
330 TEST_F(MDNodeTest, isTemporary) {
331 MDNode *U = MDTuple::get(Context, None);
332 MDNode *D = MDTuple::getDistinct(Context, None);
333 MDNode *T = MDTuple::getTemporary(Context, None);
334 EXPECT_FALSE(U->isTemporary());
335 EXPECT_FALSE(D->isTemporary());
336 EXPECT_TRUE(T->isTemporary());
337 MDNode::deleteTemporary(T);
340 TEST_F(MDNodeTest, getDistinctWithUnresolvedOperands) {
342 MDTuple *Temp = MDTuple::getTemporary(Context, None);
343 ASSERT_FALSE(Temp->isResolved());
345 // distinct !{temporary !{}}
346 Metadata *Ops[] = {Temp};
347 MDNode *Distinct = MDNode::getDistinct(Context, Ops);
348 EXPECT_TRUE(Distinct->isResolved());
349 EXPECT_EQ(Temp, Distinct->getOperand(0));
351 // temporary !{} => !{}
352 MDNode *Empty = MDNode::get(Context, None);
353 Temp->replaceAllUsesWith(Empty);
354 MDNode::deleteTemporary(Temp);
355 EXPECT_EQ(Empty, Distinct->getOperand(0));
358 TEST_F(MDNodeTest, handleChangedOperandRecursion) {
360 MDNode *N0 = MDNode::get(Context, None);
363 MDTuple *Temp3 = MDTuple::getTemporary(Context, None);
364 Metadata *Ops1[] = {Temp3, nullptr};
365 MDNode *N1 = MDNode::get(Context, Ops1);
368 Metadata *Ops2[] = {Temp3, N0};
369 MDNode *N2 = MDNode::get(Context, Ops2);
372 Metadata *Ops3[] = {N2};
373 MDNode *N3 = MDNode::get(Context, Ops3);
374 Temp3->replaceAllUsesWith(N3);
375 MDNode::deleteTemporary(Temp3);
378 Metadata *Ops4[] = {N1};
379 MDNode *N4 = MDNode::get(Context, Ops4);
381 // Confirm that the cycle prevented RAUW from getting dropped.
382 EXPECT_TRUE(N0->isResolved());
383 EXPECT_FALSE(N1->isResolved());
384 EXPECT_FALSE(N2->isResolved());
385 EXPECT_FALSE(N3->isResolved());
386 EXPECT_FALSE(N4->isResolved());
388 // Create a couple of distinct nodes to observe what's going on.
390 // !5 = distinct !{!2}
391 // !6 = distinct !{!3}
392 Metadata *Ops5[] = {N2};
393 MDNode *N5 = MDNode::getDistinct(Context, Ops5);
394 Metadata *Ops6[] = {N3};
395 MDNode *N6 = MDNode::getDistinct(Context, Ops6);
397 // Mutate !2 to look like !1, causing a uniquing collision (and an RAUW).
398 // This will ripple up, with !3 colliding with !4, and RAUWing. Since !2
399 // references !3, this can cause a re-entry of handleChangedOperand() when !3
400 // is not ready for it.
402 // !2->replaceOperandWith(1, nullptr)
403 // !2: !{!3, !0} => !{!3, null}
404 // !2->replaceAllUsesWith(!1)
405 // !3: !{!2] => !{!1}
406 // !3->replaceAllUsesWith(!4)
407 N2->replaceOperandWith(1, nullptr);
409 // If all has gone well, N2 and N3 will have been RAUW'ed and deleted from
410 // under us. Just check that the other nodes are sane.
414 // !5 = distinct !{!1}
415 // !6 = distinct !{!4}
416 EXPECT_EQ(N4, N1->getOperand(0));
417 EXPECT_EQ(N1, N4->getOperand(0));
418 EXPECT_EQ(N1, N5->getOperand(0));
419 EXPECT_EQ(N4, N6->getOperand(0));
422 TEST_F(MDNodeTest, replaceResolvedOperand) {
423 // Check code for replacing one resolved operand with another. If doing this
424 // directly (via replaceOperandWith()) becomes illegal, change the operand to
425 // a global value that gets RAUW'ed.
427 // Use a temporary node to keep N from being resolved.
428 MDTuple *Temp = MDTuple::getTemporary(Context, None);
429 Metadata *Ops[] = {nullptr, Temp};
431 MDNode *Empty = MDTuple::get(Context, ArrayRef<Metadata *>());
432 MDNode *N = MDTuple::get(Context, Ops);
433 EXPECT_EQ(nullptr, N->getOperand(0));
434 ASSERT_FALSE(N->isResolved());
436 // Check code for replacing resolved nodes.
437 N->replaceOperandWith(0, Empty);
438 EXPECT_EQ(Empty, N->getOperand(0));
440 // Check code for adding another unresolved operand.
441 N->replaceOperandWith(0, Temp);
442 EXPECT_EQ(Temp, N->getOperand(0));
444 // Remove the references to Temp; required for teardown.
445 Temp->replaceAllUsesWith(nullptr);
446 MDNode::deleteTemporary(Temp);
449 typedef MetadataTest MDLocationTest;
451 TEST_F(MDLocationTest, Overflow) {
452 MDNode *N = MDNode::get(Context, None);
454 MDLocation *L = MDLocation::get(Context, 2, 7, N);
455 EXPECT_EQ(2u, L->getLine());
456 EXPECT_EQ(7u, L->getColumn());
458 unsigned U24 = 1u << 24;
459 unsigned U16 = 1u << 16;
461 MDLocation *L = MDLocation::get(Context, U24 - 1, U16 - 1, N);
462 EXPECT_EQ(U24 - 1, L->getLine());
463 EXPECT_EQ(U16 - 1, L->getColumn());
466 MDLocation *L = MDLocation::get(Context, U24, U16, N);
467 EXPECT_EQ(0u, L->getLine());
468 EXPECT_EQ(0u, L->getColumn());
471 MDLocation *L = MDLocation::get(Context, U24 + 1, U16 + 1, N);
472 EXPECT_EQ(0u, L->getLine());
473 EXPECT_EQ(0u, L->getColumn());
477 TEST_F(MDLocationTest, getDistinct) {
478 MDNode *N = MDNode::get(Context, None);
479 MDLocation *L0 = MDLocation::getDistinct(Context, 2, 7, N);
480 EXPECT_TRUE(L0->isDistinct());
481 MDLocation *L1 = MDLocation::get(Context, 2, 7, N);
482 EXPECT_FALSE(L1->isDistinct());
483 EXPECT_EQ(L1, MDLocation::get(Context, 2, 7, N));
486 TEST_F(MDLocationTest, getTemporary) {
487 MDNode *N = MDNode::get(Context, None);
488 MDLocation *L = MDLocation::getTemporary(Context, 2, 7, N);
489 EXPECT_TRUE(L->isTemporary());
490 EXPECT_FALSE(L->isResolved());
491 MDNode::deleteTemporary(L);
494 typedef MetadataTest MetadataAsValueTest;
496 TEST_F(MetadataAsValueTest, MDNode) {
497 MDNode *N = MDNode::get(Context, None);
498 auto *V = MetadataAsValue::get(Context, N);
499 EXPECT_TRUE(V->getType()->isMetadataTy());
500 EXPECT_EQ(N, V->getMetadata());
502 auto *V2 = MetadataAsValue::get(Context, N);
506 TEST_F(MetadataAsValueTest, MDNodeMDNode) {
507 MDNode *N = MDNode::get(Context, None);
508 Metadata *Ops[] = {N};
509 MDNode *N2 = MDNode::get(Context, Ops);
510 auto *V = MetadataAsValue::get(Context, N2);
511 EXPECT_TRUE(V->getType()->isMetadataTy());
512 EXPECT_EQ(N2, V->getMetadata());
514 auto *V2 = MetadataAsValue::get(Context, N2);
517 auto *V3 = MetadataAsValue::get(Context, N);
518 EXPECT_TRUE(V3->getType()->isMetadataTy());
520 EXPECT_EQ(N, V3->getMetadata());
523 TEST_F(MetadataAsValueTest, MDNodeConstant) {
524 auto *C = ConstantInt::getTrue(Context);
525 auto *MD = ConstantAsMetadata::get(C);
526 Metadata *Ops[] = {MD};
527 auto *N = MDNode::get(Context, Ops);
529 auto *V = MetadataAsValue::get(Context, MD);
530 EXPECT_TRUE(V->getType()->isMetadataTy());
531 EXPECT_EQ(MD, V->getMetadata());
533 auto *V2 = MetadataAsValue::get(Context, N);
534 EXPECT_EQ(MD, V2->getMetadata());
538 typedef MetadataTest ValueAsMetadataTest;
540 TEST_F(ValueAsMetadataTest, UpdatesOnRAUW) {
541 Type *Ty = Type::getInt1PtrTy(Context);
542 std::unique_ptr<GlobalVariable> GV0(
543 new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
544 auto *MD = ValueAsMetadata::get(GV0.get());
545 EXPECT_TRUE(MD->getValue() == GV0.get());
546 ASSERT_TRUE(GV0->use_empty());
548 std::unique_ptr<GlobalVariable> GV1(
549 new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
550 GV0->replaceAllUsesWith(GV1.get());
551 EXPECT_TRUE(MD->getValue() == GV1.get());
554 TEST_F(ValueAsMetadataTest, CollidingDoubleUpdates) {
555 // Create a constant.
556 ConstantAsMetadata *CI = ConstantAsMetadata::get(
557 ConstantInt::get(getGlobalContext(), APInt(8, 0)));
559 // Create a temporary to prevent nodes from resolving.
560 MDTuple *Temp = MDTuple::getTemporary(Context, None);
562 // When the first operand of N1 gets reset to nullptr, it'll collide with N2.
563 Metadata *Ops1[] = {CI, CI, Temp};
564 Metadata *Ops2[] = {nullptr, CI, Temp};
566 auto *N1 = MDTuple::get(Context, Ops1);
567 auto *N2 = MDTuple::get(Context, Ops2);
570 // Tell metadata that the constant is getting deleted.
572 // After this, N1 will be invalid, so don't touch it.
573 ValueAsMetadata::handleDeletion(CI->getValue());
574 EXPECT_EQ(nullptr, N2->getOperand(0));
575 EXPECT_EQ(nullptr, N2->getOperand(1));
576 EXPECT_EQ(Temp, N2->getOperand(2));
578 // Clean up Temp for teardown.
579 Temp->replaceAllUsesWith(nullptr);
580 MDNode::deleteTemporary(Temp);
583 typedef MetadataTest TrackingMDRefTest;
585 TEST_F(TrackingMDRefTest, UpdatesOnRAUW) {
586 Type *Ty = Type::getInt1PtrTy(Context);
587 std::unique_ptr<GlobalVariable> GV0(
588 new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
589 TypedTrackingMDRef<ValueAsMetadata> MD(ValueAsMetadata::get(GV0.get()));
590 EXPECT_TRUE(MD->getValue() == GV0.get());
591 ASSERT_TRUE(GV0->use_empty());
593 std::unique_ptr<GlobalVariable> GV1(
594 new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
595 GV0->replaceAllUsesWith(GV1.get());
596 EXPECT_TRUE(MD->getValue() == GV1.get());
598 // Reset it, so we don't inadvertently test deletion.
602 TEST_F(TrackingMDRefTest, UpdatesOnDeletion) {
603 Type *Ty = Type::getInt1PtrTy(Context);
604 std::unique_ptr<GlobalVariable> GV(
605 new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
606 TypedTrackingMDRef<ValueAsMetadata> MD(ValueAsMetadata::get(GV.get()));
607 EXPECT_TRUE(MD->getValue() == GV.get());
608 ASSERT_TRUE(GV->use_empty());
614 TEST(NamedMDNodeTest, Search) {
616 ConstantAsMetadata *C =
617 ConstantAsMetadata::get(ConstantInt::get(Type::getInt32Ty(Context), 1));
618 ConstantAsMetadata *C2 =
619 ConstantAsMetadata::get(ConstantInt::get(Type::getInt32Ty(Context), 2));
621 Metadata *const V = C;
622 Metadata *const V2 = C2;
623 MDNode *n = MDNode::get(Context, V);
624 MDNode *n2 = MDNode::get(Context, V2);
626 Module M("MyModule", Context);
627 const char *Name = "llvm.NMD1";
628 NamedMDNode *NMD = M.getOrInsertNamedMetadata(Name);
633 raw_string_ostream oss(Str);
635 EXPECT_STREQ("!llvm.NMD1 = !{!0, !1}\n",