MetadataTest.cpp revision ec9186bcf975c9ffa3ec7ca97867f0ec6eb55115 
1//===- llvm/unittest/VMCore/Metadata.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 "gtest/gtest.h"
11#include "llvm/Constants.h"
12#include "llvm/Instructions.h"
13#include "llvm/LLVMContext.h"
14#include "llvm/Metadata.h"
15#include "llvm/Module.h"
16#include "llvm/Type.h"
17#include "llvm/Support/raw_ostream.h"
18#include "llvm/Support/ValueHandle.h"
19using namespace llvm;
20
21namespace {
22
23class MetadataTest : public testing::Test {
24protected:
25  LLVMContext Context;
26};
27typedef MetadataTest MDStringTest;
28
29// Test that construction of MDString with different value produces different
30// MDString objects, even with the same string pointer and nulls in the string.
31TEST_F(MDStringTest, CreateDifferent) {
32  char x[3] = { 'f', 0, 'A' };
33  MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
34  x[2] = 'B';
35  MDString *s2 = MDString::get(Context, StringRef(&x[0], 3));
36  EXPECT_NE(s1, s2);
37}
38
39// Test that creation of MDStrings with the same string contents produces the
40// same MDString object, even with different pointers.
41TEST_F(MDStringTest, CreateSame) {
42  char x[4] = { 'a', 'b', 'c', 'X' };
43  char y[4] = { 'a', 'b', 'c', 'Y' };
44
45  MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
46  MDString *s2 = MDString::get(Context, StringRef(&y[0], 3));
47  EXPECT_EQ(s1, s2);
48}
49
50// Test that MDString prints out the string we fed it.
51TEST_F(MDStringTest, PrintingSimple) {
52  char *str = new char[13];
53  strncpy(str, "testing 1 2 3", 13);
54  MDString *s = MDString::get(Context, StringRef(str, 13));
55  strncpy(str, "aaaaaaaaaaaaa", 13);
56  delete[] str;
57
58  std::string Str;
59  raw_string_ostream oss(Str);
60  s->print(oss);
61  EXPECT_STREQ("metadata !\"testing 1 2 3\"", oss.str().c_str());
62}
63
64// Test printing of MDString with non-printable characters.
65TEST_F(MDStringTest, PrintingComplex) {
66  char str[5] = {0, '\n', '"', '\\', -1};
67  MDString *s = MDString::get(Context, StringRef(str+0, 5));
68  std::string Str;
69  raw_string_ostream oss(Str);
70  s->print(oss);
71  EXPECT_STREQ("metadata !\"\\00\\0A\\22\\5C\\FF\"", oss.str().c_str());
72}
73
74typedef MetadataTest MDNodeTest;
75
76// Test the two constructors, and containing other Constants.
77TEST_F(MDNodeTest, Simple) {
78  char x[3] = { 'a', 'b', 'c' };
79  char y[3] = { '1', '2', '3' };
80
81  MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
82  MDString *s2 = MDString::get(Context, StringRef(&y[0], 3));
83  ConstantInt *CI = ConstantInt::get(getGlobalContext(), APInt(8, 0));
84
85  std::vector<Value *> V;
86  V.push_back(s1);
87  V.push_back(CI);
88  V.push_back(s2);
89
90  MDNode *n1 = MDNode::get(Context, V);
91  Value *const c1 = n1;
92  MDNode *n2 = MDNode::get(Context, c1);
93  MDNode *n3 = MDNode::get(Context, V);
94  EXPECT_NE(n1, n2);
95#ifdef ENABLE_MDNODE_UNIQUING
96  EXPECT_EQ(n1, n3);
97#else
98  (void) n3;
99#endif
100
101  EXPECT_EQ(3u, n1->getNumOperands());
102  EXPECT_EQ(s1, n1->getOperand(0));
103  EXPECT_EQ(CI, n1->getOperand(1));
104  EXPECT_EQ(s2, n1->getOperand(2));
105
106  EXPECT_EQ(1u, n2->getNumOperands());
107  EXPECT_EQ(n1, n2->getOperand(0));
108}
109
110TEST_F(MDNodeTest, Delete) {
111  Constant *C = ConstantInt::get(Type::getInt32Ty(getGlobalContext()), 1);
112  Instruction *I = new BitCastInst(C, Type::getInt32Ty(getGlobalContext()));
113
114  Value *const V = I;
115  MDNode *n = MDNode::get(Context, V);
116  WeakVH wvh = n;
117
118  EXPECT_EQ(n, wvh);
119
120  delete I;
121}
122
123TEST(NamedMDNodeTest, Search) {
124  LLVMContext Context;
125  Constant *C = ConstantInt::get(Type::getInt32Ty(Context), 1);
126  Constant *C2 = ConstantInt::get(Type::getInt32Ty(Context), 2);
127
128  Value *const V = C;
129  Value *const V2 = C2;
130  MDNode *n = MDNode::get(Context, V);
131  MDNode *n2 = MDNode::get(Context, V2);
132
133  Module M("MyModule", Context);
134  const char *Name = "llvm.NMD1";
135  NamedMDNode *NMD = M.getOrInsertNamedMetadata(Name);
136  NMD->addOperand(n);
137  NMD->addOperand(n2);
138
139  std::string Str;
140  raw_string_ostream oss(Str);
141  NMD->print(oss);
142  EXPECT_STREQ("!llvm.NMD1 = !{!0, !1}\n",
143               oss.str().c_str());
144}
145}
146