MetadataTest.cpp revision 104cf9e02b0ed94d4173869a598af6c6972a8660 
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/MDNode.h"
14#include "llvm/Type.h"
15#include "llvm/Support/ValueHandle.h"
16#include <sstream>
17
18using namespace llvm;
19
20namespace {
21
22// Test that construction of MDString with different value produces different
23// MDString objects, even with the same string pointer and nulls in the string.
24TEST(MDStringTest, CreateDifferent) {
25  char x[3] = { 'f', 0, 'A' };
26  MDString *s1 = getGlobalContext().getMDString(&x[0], &x[3]);
27  x[2] = 'B';
28  MDString *s2 = getGlobalContext().getMDString(&x[0], &x[3]);
29  EXPECT_NE(s1, s2);
30}
31
32// Test that creation of MDStrings with the same string contents produces the
33// same MDString object, even with different pointers.
34TEST(MDStringTest, CreateSame) {
35  char x[4] = { 'a', 'b', 'c', 'X' };
36  char y[4] = { 'a', 'b', 'c', 'Y' };
37
38  MDString *s1 = getGlobalContext().getMDString(&x[0], &x[3]);
39  MDString *s2 = getGlobalContext().getMDString(&y[0], &y[3]);
40  EXPECT_EQ(s1, s2);
41}
42
43// Test that MDString prints out the string we fed it.
44TEST(MDStringTest, PrintingSimple) {
45  char *str = new char[13];
46  strncpy(str, "testing 1 2 3", 13);
47  MDString *s = getGlobalContext().getMDString(str, str+13);
48  strncpy(str, "aaaaaaaaaaaaa", 13);
49  delete[] str;
50
51  std::ostringstream oss;
52  s->print(oss);
53  EXPECT_STREQ("metadata !\"testing 1 2 3\"", oss.str().c_str());
54}
55
56// Test printing of MDString with non-printable characters.
57TEST(MDStringTest, PrintingComplex) {
58  char str[5] = {0, '\n', '"', '\\', -1};
59  MDString *s = getGlobalContext().getMDString(str+0, str+5);
60  std::ostringstream oss;
61  s->print(oss);
62  EXPECT_STREQ("metadata !\"\\00\\0A\\22\\5C\\FF\"", oss.str().c_str());
63}
64
65// Test the two constructors, and containing other Constants.
66TEST(MDNodeTest, Simple) {
67  char x[3] = { 'a', 'b', 'c' };
68  char y[3] = { '1', '2', '3' };
69
70  MDString *s1 = getGlobalContext().getMDString(&x[0], &x[3]);
71  MDString *s2 = getGlobalContext().getMDString(&y[0], &y[3]);
72  ConstantInt *CI = getGlobalContext().getConstantInt(APInt(8, 0));
73
74  std::vector<Value *> V;
75  V.push_back(s1);
76  V.push_back(CI);
77  V.push_back(s2);
78
79  MDNode *n1 = getGlobalContext().getMDNode(&V[0], 3);
80  Value *const c1 = n1;
81  MDNode *n2 = getGlobalContext().getMDNode(&c1, 1);
82  MDNode *n3 = getGlobalContext().getMDNode(&V[0], 3);
83  EXPECT_NE(n1, n2);
84  EXPECT_EQ(n1, n3);
85
86  EXPECT_EQ(3u, n1->getNumElements());
87  EXPECT_EQ(s1, n1->getElement(0));
88  EXPECT_EQ(CI, n1->getElement(1));
89  EXPECT_EQ(s2, n1->getElement(2));
90
91  EXPECT_EQ(1u, n2->getNumElements());
92  EXPECT_EQ(n1, n2->getElement(0));
93
94  std::ostringstream oss1, oss2;
95  n1->print(oss1);
96  n2->print(oss2);
97  EXPECT_STREQ("!0 = metadata !{metadata !\"abc\", i8 0, metadata !\"123\"}\n",
98               oss1.str().c_str());
99  EXPECT_STREQ("!0 = metadata !{metadata !1}\n"
100               "!1 = metadata !{metadata !\"abc\", i8 0, metadata !\"123\"}\n",
101               oss2.str().c_str());
102}
103
104TEST(MDNodeTest, Delete) {
105  Constant *C = getGlobalContext().getConstantInt(Type::Int32Ty, 1);
106  Instruction *I = new BitCastInst(C, Type::Int32Ty);
107
108  Value *const V = I;
109  MDNode *n = getGlobalContext().getMDNode(&V, 1);
110  WeakVH wvh = n;
111
112  EXPECT_EQ(n, wvh);
113
114  delete I;
115
116  std::ostringstream oss;
117  wvh->print(oss);
118  EXPECT_STREQ("!0 = metadata !{null}\n", oss.str().c_str());
119}
120}
121