unittests/IR/ValueTest.cpp

   1 //===- llvm/unittest/IR/ValueTest.cpp - Value 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 "llvm/AsmParser/Parser.h"
  11 #include "llvm/IR/Function.h"
  12 #include "llvm/IR/LLVMContext.h"
  13 #include "llvm/IR/Module.h"
  14 #include "llvm/IR/ModuleSlotTracker.h"
  15 #include "llvm/IR/Value.h"
  16 #include "llvm/Support/SourceMgr.h"
  17 #include "gtest/gtest.h"
  18 using namespace llvm;
  19
  20 namespace {
  21
  22 TEST(ValueTest, UsedInBasicBlock) {
  23   LLVMContext C;
  24
  25   const char *ModuleString = "define void @f(i32 %x, i32 %y) {\n"
  26                              "bb0:\n"
  27                              "  %y1 = add i32 %y, 1\n"
  28                              "  %y2 = add i32 %y, 1\n"
  29                              "  %y3 = add i32 %y, 1\n"
  30                              "  %y4 = add i32 %y, 1\n"
  31                              "  %y5 = add i32 %y, 1\n"
  32                              "  %y6 = add i32 %y, 1\n"
  33                              "  %y7 = add i32 %y, 1\n"
  34                              "  %y8 = add i32 %x, 1\n"
  35                              "  ret void\n"
  36                              "}\n";
  37   SMDiagnostic Err;
  38   std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
  39
  40   Function *F = M->getFunction("f");
  41
  42   EXPECT_FALSE(F->isUsedInBasicBlock(&F->front()));
  43   EXPECT_TRUE((++F->arg_begin())->isUsedInBasicBlock(&F->front()));
  44   EXPECT_TRUE(F->arg_begin()->isUsedInBasicBlock(&F->front()));
  45 }
  46
  47 TEST(GlobalTest, CreateAddressSpace) {
  48   LLVMContext Ctx;
  49   std::unique_ptr<Module> M(new Module("TestModule", Ctx));
  50   Type *Int8Ty = Type::getInt8Ty(Ctx);
  51   Type *Int32Ty = Type::getInt32Ty(Ctx);
  52
  53   GlobalVariable *Dummy0
  54     = new GlobalVariable(*M,
  55                          Int32Ty,
  56                          true,
  57                          GlobalValue::ExternalLinkage,
  58                          Constant::getAllOnesValue(Int32Ty),
  59                          "dummy",
  60                          nullptr,
  61                          GlobalVariable::NotThreadLocal,
  62                          1);
  63
  64   EXPECT_TRUE(Value::MaximumAlignment == 536870912U);
  65   Dummy0->setAlignment(536870912U);
  66   EXPECT_EQ(Dummy0->getAlignment(), 536870912U);
  67
  68   // Make sure the address space isn't dropped when returning this.
  69   Constant *Dummy1 = M->getOrInsertGlobal("dummy", Int32Ty);
  70   EXPECT_EQ(Dummy0, Dummy1);
  71   EXPECT_EQ(1u, Dummy1->getType()->getPointerAddressSpace());
  72
  73
  74   // This one requires a bitcast, but the address space must also stay the same.
  75   GlobalVariable *DummyCast0
  76     = new GlobalVariable(*M,
  77                          Int32Ty,
  78                          true,
  79                          GlobalValue::ExternalLinkage,
  80                          Constant::getAllOnesValue(Int32Ty),
  81                          "dummy_cast",
  82                          nullptr,
  83                          GlobalVariable::NotThreadLocal,
  84                          1);
  85
  86   // Make sure the address space isn't dropped when returning this.
  87   Constant *DummyCast1 = M->getOrInsertGlobal("dummy_cast", Int8Ty);
  88   EXPECT_EQ(1u, DummyCast1->getType()->getPointerAddressSpace());
  89   EXPECT_NE(DummyCast0, DummyCast1) << *DummyCast1;
  90 }
  91
  92 #ifdef GTEST_HAS_DEATH_TEST
  93 #ifndef NDEBUG
  94 TEST(GlobalTest, AlignDeath) {
  95   LLVMContext Ctx;
  96   std::unique_ptr<Module> M(new Module("TestModule", Ctx));
  97   Type *Int32Ty = Type::getInt32Ty(Ctx);
  98   GlobalVariable *Var =
  99       new GlobalVariable(*M, Int32Ty, true, GlobalValue::ExternalLinkage,
 100                          Constant::getAllOnesValue(Int32Ty), "var", nullptr,
 101                          GlobalVariable::NotThreadLocal, 1);
 102
 103   EXPECT_DEATH(Var->setAlignment(536870913U), "Alignment is not a power of 2");
 104   EXPECT_DEATH(Var->setAlignment(1073741824U),
 105                "Alignment is greater than MaximumAlignment");
 106 }
 107 #endif
 108 #endif
 109
 110 TEST(ValueTest, printSlots) {
 111   // Check that Value::print() and Value::printAsOperand() work with and
 112   // without a slot tracker.
 113   LLVMContext C;
 114
 115   const char *ModuleString = "define void @f(i32 %x, i32 %y) {\n"
 116                              "entry:\n"
 117                              "  %0 = add i32 %y, 1\n"
 118                              "  %1 = add i32 %y, 1\n"
 119                              "  ret void\n"
 120                              "}\n";
 121   SMDiagnostic Err;
 122   std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
 123
 124   Function *F = M->getFunction("f");
 125   ASSERT_TRUE(F);
 126   ASSERT_FALSE(F->empty());
 127   BasicBlock &BB = F->getEntryBlock();
 128   ASSERT_EQ(3u, BB.size());
 129
 130   Instruction *I0 = &*BB.begin();
 131   ASSERT_TRUE(I0);
 132   Instruction *I1 = &*++BB.begin();
 133   ASSERT_TRUE(I1);
 134
 135   ModuleSlotTracker MST(M.get());
 136
 137 #define CHECK_PRINT(INST, STR)                                                 \
 138   do {                                                                         \
 139     {                                                                          \
 140       std::string S;                                                           \
 141       raw_string_ostream OS(S);                                                \
 142       INST->print(OS);                                                         \
 143       EXPECT_EQ(STR, OS.str());                                                \
 144     }                                                                          \
 145     {                                                                          \
 146       std::string S;                                                           \
 147       raw_string_ostream OS(S);                                                \
 148       INST->print(OS, MST);                                                    \
 149       EXPECT_EQ(STR, OS.str());                                                \
 150     }                                                                          \
 151   } while (false)
 152   CHECK_PRINT(I0, "  %0 = add i32 %y, 1");
 153   CHECK_PRINT(I1, "  %1 = add i32 %y, 1");
 154 #undef CHECK_PRINT
 155
 156 #define CHECK_PRINT_AS_OPERAND(INST, TYPE, STR)                                \
 157   do {                                                                         \
 158     {                                                                          \
 159       std::string S;                                                           \
 160       raw_string_ostream OS(S);                                                \
 161       INST->printAsOperand(OS, TYPE);                                          \
 162       EXPECT_EQ(StringRef(STR), StringRef(OS.str()));                          \
 163     }                                                                          \
 164     {                                                                          \
 165       std::string S;                                                           \
 166       raw_string_ostream OS(S);                                                \
 167       INST->printAsOperand(OS, TYPE, MST);                                     \
 168       EXPECT_EQ(StringRef(STR), StringRef(OS.str()));                          \
 169     }                                                                          \
 170   } while (false)
 171   CHECK_PRINT_AS_OPERAND(I0, false, "%0");
 172   CHECK_PRINT_AS_OPERAND(I1, false, "%1");
 173   CHECK_PRINT_AS_OPERAND(I0, true, "i32 %0");
 174   CHECK_PRINT_AS_OPERAND(I1, true, "i32 %1");
 175 #undef CHECK_PRINT_AS_OPERAND
 176 }
 177
 178 TEST(ValueTest, getLocalSlots) {
 179   // Verify that the getLocalSlot method returns the correct slot numbers.
 180   LLVMContext C;
 181   const char *ModuleString = "define void @f(i32 %x, i32 %y) {\n"
 182                              "entry:\n"
 183                              "  %0 = add i32 %y, 1\n"
 184                              "  %1 = add i32 %y, 1\n"
 185                              "  br label %2\n"
 186                              "\n"
 187                              "  ret void\n"
 188                              "}\n";
 189   SMDiagnostic Err;
 190   std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
 191
 192   Function *F = M->getFunction("f");
 193   ASSERT_TRUE(F);
 194   ASSERT_FALSE(F->empty());
 195   BasicBlock &EntryBB = F->getEntryBlock();
 196   ASSERT_EQ(3u, EntryBB.size());
 197   BasicBlock *BB2 = &*++F->begin();
 198   ASSERT_TRUE(BB2);
 199
 200   Instruction *I0 = &*EntryBB.begin();
 201   ASSERT_TRUE(I0);
 202   Instruction *I1 = &*++EntryBB.begin();
 203   ASSERT_TRUE(I1);
 204
 205   ModuleSlotTracker MST(M.get());
 206   MST.incorporateFunction(*F);
 207   EXPECT_EQ(MST.getLocalSlot(I0), 0);
 208   EXPECT_EQ(MST.getLocalSlot(I1), 1);
 209   EXPECT_EQ(MST.getLocalSlot(&EntryBB), -1);
 210   EXPECT_EQ(MST.getLocalSlot(BB2), 2);
 211 }
 212
 213 #if defined(GTEST_HAS_DEATH_TEST) && !defined(NDEBUG)
 214 TEST(ValueTest, getLocalSlotDeath) {
 215   LLVMContext C;
 216   const char *ModuleString = "define void @f(i32 %x, i32 %y) {\n"
 217                              "entry:\n"
 218                              "  %0 = add i32 %y, 1\n"
 219                              "  %1 = add i32 %y, 1\n"
 220                              "  br label %2\n"
 221                              "\n"
 222                              "  ret void\n"
 223                              "}\n";
 224   SMDiagnostic Err;
 225   std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
 226
 227   Function *F = M->getFunction("f");
 228   ASSERT_TRUE(F);
 229   ASSERT_FALSE(F->empty());
 230   BasicBlock *BB2 = &*++F->begin();
 231   ASSERT_TRUE(BB2);
 232
 233   ModuleSlotTracker MST(M.get());
 234   EXPECT_DEATH(MST.getLocalSlot(BB2), "No function incorporated");
 235 }
 236 #endif
 237
 238 } // end anonymous namespace