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/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"
  19 using namespace llvm;
  20
  21 namespace {
  22
  23 class MetadataTest : public testing::Test {
  24 protected:
  25   LLVMContext Context;
  26 };
  27 typedef 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.
  31 TEST_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.
  41 TEST_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.
  51 TEST_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.
  65 TEST_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
  74 typedef MetadataTest MDNodeTest;
  75
  76 // Test the two constructors, and containing other Constants.
  77 TEST_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[0], 3);
  91   Value *const c1 = n1;
  92   MDNode *n2 = MDNode::get(Context, &c1, 1);
  93   MDNode *n3 = MDNode::get(Context, &V[0], 3);
  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
 110 TEST_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, 1);
 116   WeakVH wvh = n;
 117
 118   EXPECT_EQ(n, wvh);
 119
 120   delete I;
 121 }
 122
 123 TEST(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, 1);
 131   MDNode *n2 = MDNode::get(Context, &V2, 1);
 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 }