MetadataTest.cpp revision bb916fbadd6bfa37ce8009f49eb1d4ec9f34a4b6 
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/ValueHandle.h"
17#include <sstream>
18
19using namespace llvm;
20
21namespace {
22
23// Test that construction of MDString with different value produces different
24// MDString objects, even with the same string pointer and nulls in the string.
25TEST(MDStringTest, CreateDifferent) {
26  char x[3] = { 'f', 0, 'A' };
27  MDString *s1 = getGlobalContext().getMDString(StringRef(&x[0], 3));
28  x[2] = 'B';
29  MDString *s2 = getGlobalContext().getMDString(StringRef(&x[0], 3));
30  EXPECT_NE(s1, s2);
31}
32
33// Test that creation of MDStrings with the same string contents produces the
34// same MDString object, even with different pointers.
35TEST(MDStringTest, CreateSame) {
36  char x[4] = { 'a', 'b', 'c', 'X' };
37  char y[4] = { 'a', 'b', 'c', 'Y' };
38
39  MDString *s1 = getGlobalContext().getMDString(StringRef(&x[0], 3));
40  MDString *s2 = getGlobalContext().getMDString(StringRef(&y[0], 3));
41  EXPECT_EQ(s1, s2);
42}
43
44// Test that MDString prints out the string we fed it.
45TEST(MDStringTest, PrintingSimple) {
46  char *str = new char[13];
47  strncpy(str, "testing 1 2 3", 13);
48  MDString *s = getGlobalContext().getMDString(StringRef(str, 13));
49  strncpy(str, "aaaaaaaaaaaaa", 13);
50  delete[] str;
51
52  std::ostringstream oss;
53  s->print(oss);
54  EXPECT_STREQ("metadata !\"testing 1 2 3\"", oss.str().c_str());
55}
56
57// Test printing of MDString with non-printable characters.
58TEST(MDStringTest, PrintingComplex) {
59  char str[5] = {0, '\n', '"', '\\', -1};
60  MDString *s = getGlobalContext().getMDString(StringRef(str+0, 5));
61  std::ostringstream oss;
62  s->print(oss);
63  EXPECT_STREQ("metadata !\"\\00\\0A\\22\\5C\\FF\"", oss.str().c_str());
64}
65
66// Test the two constructors, and containing other Constants.
67TEST(MDNodeTest, Simple) {
68  char x[3] = { 'a', 'b', 'c' };
69  char y[3] = { '1', '2', '3' };
70
71  MDString *s1 = getGlobalContext().getMDString(StringRef(&x[0], 3));
72  MDString *s2 = getGlobalContext().getMDString(StringRef(&y[0], 3));
73  ConstantInt *CI = ConstantInt::get(getGlobalContext(), APInt(8, 0));
74
75  std::vector<Value *> V;
76  V.push_back(s1);
77  V.push_back(CI);
78  V.push_back(s2);
79
80  MDNode *n1 = getGlobalContext().getMDNode(&V[0], 3);
81  Value *const c1 = n1;
82  MDNode *n2 = getGlobalContext().getMDNode(&c1, 1);
83  MDNode *n3 = getGlobalContext().getMDNode(&V[0], 3);
84  EXPECT_NE(n1, n2);
85  EXPECT_EQ(n1, n3);
86
87  EXPECT_EQ(3u, n1->getNumElements());
88  EXPECT_EQ(s1, n1->getElement(0));
89  EXPECT_EQ(CI, n1->getElement(1));
90  EXPECT_EQ(s2, n1->getElement(2));
91
92  EXPECT_EQ(1u, n2->getNumElements());
93  EXPECT_EQ(n1, n2->getElement(0));
94
95  std::ostringstream oss1, oss2;
96  n1->print(oss1);
97  n2->print(oss2);
98  EXPECT_STREQ("!0 = metadata !{metadata !\"abc\", i8 0, metadata !\"123\"}\n",
99               oss1.str().c_str());
100  EXPECT_STREQ("!0 = metadata !{metadata !1}\n"
101               "!1 = metadata !{metadata !\"abc\", i8 0, metadata !\"123\"}\n",
102               oss2.str().c_str());
103}
104
105TEST(MDNodeTest, Delete) {
106  Constant *C = ConstantInt::get(Type::Int32Ty, 1);
107  Instruction *I = new BitCastInst(C, Type::Int32Ty);
108
109  Value *const V = I;
110  MDNode *n = getGlobalContext().getMDNode(&V, 1);
111  WeakVH wvh = n;
112
113  EXPECT_EQ(n, wvh);
114
115  delete I;
116
117  std::ostringstream oss;
118  wvh->print(oss);
119  EXPECT_STREQ("!0 = metadata !{null}\n", oss.str().c_str());
120}
121
122  // FIXME: Disabled, this crashes on linux.
123#if 0
124TEST(NamedMDNodeTest, Search) {
125  Constant *C = ConstantInt::get(Type::Int32Ty, 1);
126  Constant *C2 = ConstantInt::get(Type::Int32Ty, 2);
127
128  Value *const V = C;
129  Value *const V2 = C2;
130  MDNode *n = getGlobalContext().getMDNode(&V, 1);
131  MDNode *n2 = getGlobalContext().getMDNode(&V2, 1);
132
133  MetadataBase *Nodes[2] = { n, n2 };
134
135  Module *M = new Module("MyModule", getGlobalContext());
136  const char *Name = "llvm.NMD1";
137  NamedMDNode *NMD = NamedMDNode::Create(Name, &Nodes[0], 2, M);
138  std::ostringstream oss;
139  NMD->print(oss);
140  EXPECT_STREQ("!llvm.NMD1 = !{!0, !1}\n!0 = metadata !{i32 1}\n"
141               "!1 = metadata !{i32 2}\n",
142               oss.str().c_str());
143}
144#endif
145}
146