unittests/VMCore/MetadataTest.cpp

   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"
  18 using namespace llvm;
  19
  20 namespace {
  21
  22 LLVMContext &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.
  26 TEST(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.
  36 TEST(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.
  46 TEST(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.
  60 TEST(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.
  70 TEST(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
 114 TEST(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
 132 TEST(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 }