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/IR/Value.h"
  11 #include "llvm/AsmParser/Parser.h"
  12 #include "llvm/IR/Function.h"
  13 #include "llvm/IR/LLVMContext.h"
  14 #include "llvm/IR/Module.h"
  15 #include "llvm/IR/ModuleSlotTracker.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(std::next(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 = "@g0 = external global %500\n"
 116                              "@g1 = external global %900\n"
 117                              "\n"
 118                              "%900 = type { i32, i32 }\n"
 119                              "%500 = type { i32 }\n"
 120                              "\n"
 121                              "define void @f(i32 %x, i32 %y) {\n"
 122                              "entry:\n"
 123                              "  %0 = add i32 %y, 1\n"
 124                              "  %1 = add i32 %y, 1\n"
 125                              "  ret void\n"
 126                              "}\n";
 127   SMDiagnostic Err;
 128   std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
 129
 130   Function *F = M->getFunction("f");
 131   ASSERT_TRUE(F);
 132   ASSERT_FALSE(F->empty());
 133   BasicBlock &BB = F->getEntryBlock();
 134   ASSERT_EQ(3u, BB.size());
 135
 136   Instruction *I0 = &*BB.begin();
 137   ASSERT_TRUE(I0);
 138   Instruction *I1 = &*++BB.begin();
 139   ASSERT_TRUE(I1);
 140
 141   GlobalVariable *G0 = M->getGlobalVariable("g0");
 142   ASSERT_TRUE(G0);
 143   GlobalVariable *G1 = M->getGlobalVariable("g1");
 144   ASSERT_TRUE(G1);
 145
 146   ModuleSlotTracker MST(M.get());
 147
 148 #define CHECK_PRINT(INST, STR)                                                 \
 149   do {                                                                         \
 150     {                                                                          \
 151       std::string S;                                                           \
 152       raw_string_ostream OS(S);                                                \
 153       INST->print(OS);                                                         \
 154       EXPECT_EQ(STR, OS.str());                                                \
 155     }                                                                          \
 156     {                                                                          \
 157       std::string S;                                                           \
 158       raw_string_ostream OS(S);                                                \
 159       INST->print(OS, MST);                                                    \
 160       EXPECT_EQ(STR, OS.str());                                                \
 161     }                                                                          \
 162   } while (false)
 163   CHECK_PRINT(I0, "  %0 = add i32 %y, 1");
 164   CHECK_PRINT(I1, "  %1 = add i32 %y, 1");
 165 #undef CHECK_PRINT
 166
 167 #define CHECK_PRINT_AS_OPERAND(INST, TYPE, STR)                                \
 168   do {                                                                         \
 169     {                                                                          \
 170       std::string S;                                                           \
 171       raw_string_ostream OS(S);                                                \
 172       INST->printAsOperand(OS, TYPE);                                          \
 173       EXPECT_EQ(StringRef(STR), StringRef(OS.str()));                          \
 174     }                                                                          \
 175     {                                                                          \
 176       std::string S;                                                           \
 177       raw_string_ostream OS(S);                                                \
 178       INST->printAsOperand(OS, TYPE, MST);                                     \
 179       EXPECT_EQ(StringRef(STR), StringRef(OS.str()));                          \
 180     }                                                                          \
 181   } while (false)
 182   CHECK_PRINT_AS_OPERAND(I0, false, "%0");
 183   CHECK_PRINT_AS_OPERAND(I1, false, "%1");
 184   CHECK_PRINT_AS_OPERAND(I0, true, "i32 %0");
 185   CHECK_PRINT_AS_OPERAND(I1, true, "i32 %1");
 186   CHECK_PRINT_AS_OPERAND(G0, true, "%0* @g0");
 187   CHECK_PRINT_AS_OPERAND(G1, true, "%1* @g1");
 188 #undef CHECK_PRINT_AS_OPERAND
 189 }
 190
 191 TEST(ValueTest, getLocalSlots) {
 192   // Verify that the getLocalSlot method returns the correct slot numbers.
 193   LLVMContext C;
 194   const char *ModuleString = "define void @f(i32 %x, i32 %y) {\n"
 195                              "entry:\n"
 196                              "  %0 = add i32 %y, 1\n"
 197                              "  %1 = add i32 %y, 1\n"
 198                              "  br label %2\n"
 199                              "\n"
 200                              "  ret void\n"
 201                              "}\n";
 202   SMDiagnostic Err;
 203   std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
 204
 205   Function *F = M->getFunction("f");
 206   ASSERT_TRUE(F);
 207   ASSERT_FALSE(F->empty());
 208   BasicBlock &EntryBB = F->getEntryBlock();
 209   ASSERT_EQ(3u, EntryBB.size());
 210   BasicBlock *BB2 = &*++F->begin();
 211   ASSERT_TRUE(BB2);
 212
 213   Instruction *I0 = &*EntryBB.begin();
 214   ASSERT_TRUE(I0);
 215   Instruction *I1 = &*++EntryBB.begin();
 216   ASSERT_TRUE(I1);
 217
 218   ModuleSlotTracker MST(M.get());
 219   MST.incorporateFunction(*F);
 220   EXPECT_EQ(MST.getLocalSlot(I0), 0);
 221   EXPECT_EQ(MST.getLocalSlot(I1), 1);
 222   EXPECT_EQ(MST.getLocalSlot(&EntryBB), -1);
 223   EXPECT_EQ(MST.getLocalSlot(BB2), 2);
 224 }
 225
 226 #if defined(GTEST_HAS_DEATH_TEST) && !defined(NDEBUG)
 227 TEST(ValueTest, getLocalSlotDeath) {
 228   LLVMContext C;
 229   const char *ModuleString = "define void @f(i32 %x, i32 %y) {\n"
 230                              "entry:\n"
 231                              "  %0 = add i32 %y, 1\n"
 232                              "  %1 = add i32 %y, 1\n"
 233                              "  br label %2\n"
 234                              "\n"
 235                              "  ret void\n"
 236                              "}\n";
 237   SMDiagnostic Err;
 238   std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
 239
 240   Function *F = M->getFunction("f");
 241   ASSERT_TRUE(F);
 242   ASSERT_FALSE(F->empty());
 243   BasicBlock *BB2 = &*++F->begin();
 244   ASSERT_TRUE(BB2);
 245
 246   ModuleSlotTracker MST(M.get());
 247   EXPECT_DEATH(MST.getLocalSlot(BB2), "No function incorporated");
 248 }
 249 #endif
 250
 251 } // end anonymous namespace