MetadataTest.cpp revision 7b26b581cf3c20f9943c904e44ee5ec6d77f5aa2 
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/Metadata.h"
14#include "llvm/Module.h"
15#include "llvm/Type.h"
16#include "llvm/Support/raw_ostream.h"
17#include "llvm/Support/ValueHandle.h"
18using namespace llvm;
19
20namespace {
21
22LLVMContext &Context = getGlobalContext();
23
24// Test that construction of MDString with different value produces different
25// MDString objects, even with the same string pointer and nulls in the string.
26TEST(MDStringTest, CreateDifferent) {
27  char x[3] = { 'f', 0, 'A' };
28  MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
29  x[2] = 'B';
30  MDString *s2 = MDString::get(Context, StringRef(&x[0], 3));
31  EXPECT_NE(s1, s2);
32}
33
34// Test that creation of MDStrings with the same string contents produces the
35// same MDString object, even with different pointers.
36TEST(MDStringTest, CreateSame) {
37  char x[4] = { 'a', 'b', 'c', 'X' };
38  char y[4] = { 'a', 'b', 'c', 'Y' };
39
40  MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
41  MDString *s2 = MDString::get(Context, StringRef(&y[0], 3));
42  EXPECT_EQ(s1, s2);
43}
44
45// Test that MDString prints out the string we fed it.
46TEST(MDStringTest, PrintingSimple) {
47  char *str = new char[13];
48  strncpy(str, "testing 1 2 3", 13);
49  MDString *s = MDString::get(Context, StringRef(str, 13));
50  strncpy(str, "aaaaaaaaaaaaa", 13);
51  delete[] str;
52
53  std::string Str;
54  raw_string_ostream oss(Str);
55  s->print(oss);
56  EXPECT_STREQ("metadata !\"testing 1 2 3\"", oss.str().c_str());
57}
58
59// Test printing of MDString with non-printable characters.
60TEST(MDStringTest, PrintingComplex) {
61  char str[5] = {0, '\n', '"', '\\', -1};
62  MDString *s = MDString::get(Context, StringRef(str+0, 5));
63  std::string Str;
64  raw_string_ostream oss(Str);
65  s->print(oss);
66  EXPECT_STREQ("metadata !\"\\00\\0A\\22\\5C\\FF\"", oss.str().c_str());
67}
68
69// Test the two constructors, and containing other Constants.
70TEST(MDNodeTest, Simple) {
71  char x[3] = { 'a', 'b', 'c' };
72  char y[3] = { '1', '2', '3' };
73
74  MDString *s1 = MDString::get(Context, StringRef(&x[0], 3));
75  MDString *s2 = MDString::get(Context, StringRef(&y[0], 3));
76  ConstantInt *CI = ConstantInt::get(getGlobalContext(), APInt(8, 0));
77
78  std::vector<Value *> V;
79  V.push_back(s1);
80  V.push_back(CI);
81  V.push_back(s2);
82
83  MDNode *n1 = MDNode::get(Context, &V[0], 3);
84  Value *const c1 = n1;
85  MDNode *n2 = MDNode::get(Context, &c1, 1);
86  MDNode *n3 = MDNode::get(Context, &V[0], 3);
87  EXPECT_NE(n1, n2);
88#ifdef ENABLE_MDNODE_UNIQUING
89  EXPECT_EQ(n1, n3);
90#else
91  (void) n3;
92#endif
93
94  EXPECT_EQ(3u, n1->getNumElements());
95  EXPECT_EQ(s1, n1->getElement(0));
96  EXPECT_EQ(CI, n1->getElement(1));
97  EXPECT_EQ(s2, n1->getElement(2));
98
99  EXPECT_EQ(1u, n2->getNumElements());
100  EXPECT_EQ(n1, n2->getElement(0));
101
102  std::string Str;
103  raw_string_ostream oss(Str);
104  n1->print(oss);
105  EXPECT_STREQ("!0 = metadata !{metadata !\"abc\", i8 0, metadata !\"123\"}\n",
106               oss.str().c_str());
107  Str.clear();
108  n2->print(oss);
109  EXPECT_STREQ("!0 = metadata !{metadata !1}\n"
110               "!1 = metadata !{metadata !\"abc\", i8 0, metadata !\"123\"}\n",
111               oss.str().c_str());
112}
113
114TEST(MDNodeTest, Delete) {
115  Constant *C = ConstantInt::get(Type::getInt32Ty(getGlobalContext()), 1);
116  Instruction *I = new BitCastInst(C, Type::getInt32Ty(getGlobalContext()));
117
118  Value *const V = I;
119  MDNode *n = MDNode::get(Context, &V, 1);
120  WeakVH wvh = n;
121
122  EXPECT_EQ(n, wvh);
123
124  delete I;
125
126  std::string Str;
127  raw_string_ostream oss(Str);
128  wvh->print(oss);
129  EXPECT_STREQ("!0 = metadata !{null}\n", oss.str().c_str());
130}
131
132TEST(NamedMDNodeTest, Search) {
133  Constant *C = ConstantInt::get(Type::getInt32Ty(getGlobalContext()), 1);
134  Constant *C2 = ConstantInt::get(Type::getInt32Ty(getGlobalContext()), 2);
135
136  Value *const V = C;
137  Value *const V2 = C2;
138  MDNode *n = MDNode::get(Context, &V, 1);
139  MDNode *n2 = MDNode::get(Context, &V2, 1);
140
141  MetadataBase *Nodes[2] = { n, n2 };
142
143  Module *M = new Module("MyModule", getGlobalContext());
144  const char *Name = "llvm.NMD1";
145  NamedMDNode *NMD = NamedMDNode::Create(getGlobalContext(), Name, &Nodes[0], 2, M);
146  std::string Str;
147  raw_string_ostream oss(Str);
148  NMD->print(oss);
149  EXPECT_STREQ("!llvm.NMD1 = !{!0, !1}\n!0 = metadata !{i32 1}\n"
150               "!1 = metadata !{i32 2}\n",
151               oss.str().c_str());
152}
153}
154