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40b944ca0c
Now that `LLVMContextImpl` can call `MDNode::dropAllReferences()` to prevent teardown madness, stop dropping uniquing just because an operand drops to null. Part of PR21532. llvm-svn: 225223
341 lines
9.9 KiB
C++
341 lines
9.9 KiB
C++
//===- llvm/unittest/IR/Metadata.cpp - Metadata unit tests ----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/Metadata.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Type.h"
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#include "llvm/Support/raw_ostream.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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class MetadataTest : public testing::Test {
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protected:
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LLVMContext Context;
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MDNode *getNode() { return MDNode::get(Context, None); }
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MDNode *getNode(Metadata *MD) { return MDNode::get(Context, MD); }
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MDNode *getNode(Metadata *MD1, Metadata *MD2) {
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Metadata *MDs[] = {MD1, MD2};
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return MDNode::get(Context, MDs);
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}
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};
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typedef MetadataTest MDStringTest;
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// Test that construction of MDString with different value produces different
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// MDString objects, even with the same string pointer and nulls in the string.
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TEST_F(MDStringTest, CreateDifferent) {
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char x[3] = { 'f', 0, 'A' };
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MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
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x[2] = 'B';
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MDString *s2 = MDString::get(Context, StringRef(&x[0], 3));
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EXPECT_NE(s1, s2);
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}
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// Test that creation of MDStrings with the same string contents produces the
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// same MDString object, even with different pointers.
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TEST_F(MDStringTest, CreateSame) {
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char x[4] = { 'a', 'b', 'c', 'X' };
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char y[4] = { 'a', 'b', 'c', 'Y' };
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MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
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MDString *s2 = MDString::get(Context, StringRef(&y[0], 3));
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EXPECT_EQ(s1, s2);
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}
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// Test that MDString prints out the string we fed it.
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TEST_F(MDStringTest, PrintingSimple) {
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char *str = new char[13];
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strncpy(str, "testing 1 2 3", 13);
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MDString *s = MDString::get(Context, StringRef(str, 13));
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strncpy(str, "aaaaaaaaaaaaa", 13);
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delete[] str;
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std::string Str;
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raw_string_ostream oss(Str);
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s->print(oss);
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EXPECT_STREQ("!\"testing 1 2 3\"", oss.str().c_str());
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}
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// Test printing of MDString with non-printable characters.
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TEST_F(MDStringTest, PrintingComplex) {
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char str[5] = {0, '\n', '"', '\\', (char)-1};
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MDString *s = MDString::get(Context, StringRef(str+0, 5));
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std::string Str;
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raw_string_ostream oss(Str);
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s->print(oss);
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EXPECT_STREQ("!\"\\00\\0A\\22\\5C\\FF\"", oss.str().c_str());
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}
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typedef MetadataTest MDNodeTest;
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// Test the two constructors, and containing other Constants.
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TEST_F(MDNodeTest, Simple) {
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char x[3] = { 'a', 'b', 'c' };
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char y[3] = { '1', '2', '3' };
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MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
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MDString *s2 = MDString::get(Context, StringRef(&y[0], 3));
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ConstantAsMetadata *CI = ConstantAsMetadata::get(
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ConstantInt::get(getGlobalContext(), APInt(8, 0)));
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std::vector<Metadata *> V;
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V.push_back(s1);
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V.push_back(CI);
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V.push_back(s2);
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MDNode *n1 = MDNode::get(Context, V);
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Metadata *const c1 = n1;
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MDNode *n2 = MDNode::get(Context, c1);
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Metadata *const c2 = n2;
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MDNode *n3 = MDNode::get(Context, V);
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MDNode *n4 = MDNode::getIfExists(Context, V);
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MDNode *n5 = MDNode::getIfExists(Context, c1);
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MDNode *n6 = MDNode::getIfExists(Context, c2);
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EXPECT_NE(n1, n2);
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EXPECT_EQ(n1, n3);
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EXPECT_EQ(n4, n1);
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EXPECT_EQ(n5, n2);
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EXPECT_EQ(n6, (Metadata *)nullptr);
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EXPECT_EQ(3u, n1->getNumOperands());
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EXPECT_EQ(s1, n1->getOperand(0));
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EXPECT_EQ(CI, n1->getOperand(1));
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EXPECT_EQ(s2, n1->getOperand(2));
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EXPECT_EQ(1u, n2->getNumOperands());
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EXPECT_EQ(n1, n2->getOperand(0));
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}
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TEST_F(MDNodeTest, Delete) {
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Constant *C = ConstantInt::get(Type::getInt32Ty(getGlobalContext()), 1);
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Instruction *I = new BitCastInst(C, Type::getInt32Ty(getGlobalContext()));
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Metadata *const V = LocalAsMetadata::get(I);
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MDNode *n = MDNode::get(Context, V);
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TrackingMDRef wvh(n);
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EXPECT_EQ(n, wvh);
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delete I;
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}
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TEST_F(MDNodeTest, SelfReference) {
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// !0 = !{!0}
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// !1 = !{!0}
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{
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MDNode *Temp = MDNode::getTemporary(Context, None);
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Metadata *Args[] = {Temp};
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MDNode *Self = MDNode::get(Context, Args);
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Self->replaceOperandWith(0, Self);
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MDNode::deleteTemporary(Temp);
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ASSERT_EQ(Self, Self->getOperand(0));
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// Self-references should be distinct, so MDNode::get() should grab a
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// uniqued node that references Self, not Self.
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Args[0] = Self;
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MDNode *Ref1 = MDNode::get(Context, Args);
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MDNode *Ref2 = MDNode::get(Context, Args);
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EXPECT_NE(Self, Ref1);
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EXPECT_EQ(Ref1, Ref2);
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}
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// !0 = !{!0, !{}}
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// !1 = !{!0, !{}}
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{
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MDNode *Temp = MDNode::getTemporary(Context, None);
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Metadata *Args[] = {Temp, MDNode::get(Context, None)};
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MDNode *Self = MDNode::get(Context, Args);
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Self->replaceOperandWith(0, Self);
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MDNode::deleteTemporary(Temp);
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ASSERT_EQ(Self, Self->getOperand(0));
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// Self-references should be distinct, so MDNode::get() should grab a
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// uniqued node that references Self, not Self itself.
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Args[0] = Self;
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MDNode *Ref1 = MDNode::get(Context, Args);
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MDNode *Ref2 = MDNode::get(Context, Args);
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EXPECT_NE(Self, Ref1);
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EXPECT_EQ(Ref1, Ref2);
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}
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}
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TEST_F(MDNodeTest, Print) {
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Constant *C = ConstantInt::get(Type::getInt32Ty(Context), 7);
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MDString *S = MDString::get(Context, "foo");
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MDNode *N0 = getNode();
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MDNode *N1 = getNode(N0);
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MDNode *N2 = getNode(N0, N1);
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Metadata *Args[] = {ConstantAsMetadata::get(C), S, nullptr, N0, N1, N2};
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MDNode *N = MDNode::get(Context, Args);
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std::string Expected;
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{
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raw_string_ostream OS(Expected);
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OS << "!{";
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C->printAsOperand(OS);
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OS << ", ";
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S->printAsOperand(OS);
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OS << ", null";
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MDNode *Nodes[] = {N0, N1, N2};
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for (auto *Node : Nodes)
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OS << ", <" << (void *)Node << ">";
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OS << "}\n";
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}
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std::string Actual;
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{
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raw_string_ostream OS(Actual);
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N->print(OS);
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}
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EXPECT_EQ(Expected, Actual);
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}
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TEST_F(MDNodeTest, NullOperand) {
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// metadata !{}
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MDNode *Empty = MDNode::get(Context, None);
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// metadata !{metadata !{}}
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Metadata *Ops[] = {Empty};
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MDNode *N = MDNode::get(Context, Ops);
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ASSERT_EQ(Empty, N->getOperand(0));
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// metadata !{metadata !{}} => metadata !{null}
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N->replaceOperandWith(0, nullptr);
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ASSERT_EQ(nullptr, N->getOperand(0));
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// metadata !{null}
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Ops[0] = nullptr;
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MDNode *NullOp = MDNode::get(Context, Ops);
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ASSERT_EQ(nullptr, NullOp->getOperand(0));
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EXPECT_EQ(N, NullOp);
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}
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typedef MetadataTest MetadataAsValueTest;
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TEST_F(MetadataAsValueTest, MDNode) {
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MDNode *N = MDNode::get(Context, None);
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auto *V = MetadataAsValue::get(Context, N);
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EXPECT_TRUE(V->getType()->isMetadataTy());
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EXPECT_EQ(N, V->getMetadata());
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auto *V2 = MetadataAsValue::get(Context, N);
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EXPECT_EQ(V, V2);
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}
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TEST_F(MetadataAsValueTest, MDNodeMDNode) {
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MDNode *N = MDNode::get(Context, None);
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Metadata *Ops[] = {N};
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MDNode *N2 = MDNode::get(Context, Ops);
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auto *V = MetadataAsValue::get(Context, N2);
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EXPECT_TRUE(V->getType()->isMetadataTy());
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EXPECT_EQ(N2, V->getMetadata());
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auto *V2 = MetadataAsValue::get(Context, N2);
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EXPECT_EQ(V, V2);
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auto *V3 = MetadataAsValue::get(Context, N);
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EXPECT_TRUE(V3->getType()->isMetadataTy());
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EXPECT_NE(V, V3);
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EXPECT_EQ(N, V3->getMetadata());
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}
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TEST_F(MetadataAsValueTest, MDNodeConstant) {
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auto *C = ConstantInt::getTrue(Context);
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auto *MD = ConstantAsMetadata::get(C);
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Metadata *Ops[] = {MD};
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auto *N = MDNode::get(Context, Ops);
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auto *V = MetadataAsValue::get(Context, MD);
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EXPECT_TRUE(V->getType()->isMetadataTy());
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EXPECT_EQ(MD, V->getMetadata());
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auto *V2 = MetadataAsValue::get(Context, N);
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EXPECT_EQ(MD, V2->getMetadata());
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EXPECT_EQ(V, V2);
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}
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typedef MetadataTest ValueAsMetadataTest;
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TEST_F(ValueAsMetadataTest, UpdatesOnRAUW) {
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Type *Ty = Type::getInt1PtrTy(Context);
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std::unique_ptr<GlobalVariable> GV0(
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new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
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auto *MD = ValueAsMetadata::get(GV0.get());
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EXPECT_TRUE(MD->getValue() == GV0.get());
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ASSERT_TRUE(GV0->use_empty());
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std::unique_ptr<GlobalVariable> GV1(
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new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
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GV0->replaceAllUsesWith(GV1.get());
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EXPECT_TRUE(MD->getValue() == GV1.get());
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}
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typedef MetadataTest TrackingMDRefTest;
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TEST_F(TrackingMDRefTest, UpdatesOnRAUW) {
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Type *Ty = Type::getInt1PtrTy(Context);
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std::unique_ptr<GlobalVariable> GV0(
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new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
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TypedTrackingMDRef<ValueAsMetadata> MD(ValueAsMetadata::get(GV0.get()));
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EXPECT_TRUE(MD->getValue() == GV0.get());
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ASSERT_TRUE(GV0->use_empty());
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std::unique_ptr<GlobalVariable> GV1(
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new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
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GV0->replaceAllUsesWith(GV1.get());
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EXPECT_TRUE(MD->getValue() == GV1.get());
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// Reset it, so we don't inadvertently test deletion.
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MD.reset();
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}
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TEST_F(TrackingMDRefTest, UpdatesOnDeletion) {
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Type *Ty = Type::getInt1PtrTy(Context);
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std::unique_ptr<GlobalVariable> GV(
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new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage));
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TypedTrackingMDRef<ValueAsMetadata> MD(ValueAsMetadata::get(GV.get()));
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EXPECT_TRUE(MD->getValue() == GV.get());
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ASSERT_TRUE(GV->use_empty());
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GV.reset();
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EXPECT_TRUE(!MD);
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}
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TEST(NamedMDNodeTest, Search) {
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LLVMContext Context;
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ConstantAsMetadata *C =
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ConstantAsMetadata::get(ConstantInt::get(Type::getInt32Ty(Context), 1));
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ConstantAsMetadata *C2 =
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ConstantAsMetadata::get(ConstantInt::get(Type::getInt32Ty(Context), 2));
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Metadata *const V = C;
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Metadata *const V2 = C2;
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MDNode *n = MDNode::get(Context, V);
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MDNode *n2 = MDNode::get(Context, V2);
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Module M("MyModule", Context);
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const char *Name = "llvm.NMD1";
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NamedMDNode *NMD = M.getOrInsertNamedMetadata(Name);
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NMD->addOperand(n);
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NMD->addOperand(n2);
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std::string Str;
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raw_string_ostream oss(Str);
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NMD->print(oss);
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EXPECT_STREQ("!llvm.NMD1 = !{!0, !1}\n",
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oss.str().c_str());
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}
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}
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