unittests/IR/ValueTest.cpp

   1 //===- llvm/unittest/IR/ValueTest.cpp - Value unit tests ------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/IR/Value.h"
  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/Support/SourceMgr.h"
  16 #include "gtest/gtest.h"
  17 using namespace llvm;
  18
  19 namespace {
  20
  21 TEST(ValueTest, UsedInBasicBlock) {
  22   LLVMContext C;
  23
  24   const char *ModuleString = "define void @f(i32 %x, i32 %y) {\n"
  25                              "bb0:\n"
  26                              "  %y1 = add i32 %y, 1\n"
  27                              "  %y2 = add i32 %y, 1\n"
  28                              "  %y3 = add i32 %y, 1\n"
  29                              "  %y4 = add i32 %y, 1\n"
  30                              "  %y5 = add i32 %y, 1\n"
  31                              "  %y6 = add i32 %y, 1\n"
  32                              "  %y7 = add i32 %y, 1\n"
  33                              "  %y8 = add i32 %x, 1\n"
  34                              "  ret void\n"
  35                              "}\n";
  36   SMDiagnostic Err;
  37   std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
  38
  39   Function *F = M->getFunction("f");
  40
  41   EXPECT_FALSE(F->isUsedInBasicBlock(&F->front()));
  42   EXPECT_TRUE(std::next(F->arg_begin())->isUsedInBasicBlock(&F->front()));
  43   EXPECT_TRUE(F->arg_begin()->isUsedInBasicBlock(&F->front()));
  44 }
  45
  46 TEST(GlobalTest, CreateAddressSpace) {
  47   LLVMContext Ctx;
  48   std::unique_ptr<Module> M(new Module("TestModule", Ctx));
  49   Type *Int8Ty = Type::getInt8Ty(Ctx);
  50   Type *Int32Ty = Type::getInt32Ty(Ctx);
  51
  52   GlobalVariable *Dummy0
  53     = new GlobalVariable(*M,
  54                          Int32Ty,
  55                          true,
  56                          GlobalValue::ExternalLinkage,
  57                          Constant::getAllOnesValue(Int32Ty),
  58                          "dummy",
  59                          nullptr,
  60                          GlobalVariable::NotThreadLocal,
  61                          1);
  62
  63   EXPECT_TRUE(Value::MaximumAlignment == 536870912U);
  64   Dummy0->setAlignment(536870912U);
  65   EXPECT_EQ(Dummy0->getAlignment(), 536870912U);
  66
  67   // Make sure the address space isn't dropped when returning this.
  68   Constant *Dummy1 = M->getOrInsertGlobal("dummy", Int32Ty);
  69   EXPECT_EQ(Dummy0, Dummy1);
  70   EXPECT_EQ(1u, Dummy1->getType()->getPointerAddressSpace());
  71
  72
  73   // This one requires a bitcast, but the address space must also stay the same.
  74   GlobalVariable *DummyCast0
  75     = new GlobalVariable(*M,
  76                          Int32Ty,
  77                          true,
  78                          GlobalValue::ExternalLinkage,
  79                          Constant::getAllOnesValue(Int32Ty),
  80                          "dummy_cast",
  81                          nullptr,
  82                          GlobalVariable::NotThreadLocal,
  83                          1);
  84
  85   // Make sure the address space isn't dropped when returning this.
  86   Constant *DummyCast1 = M->getOrInsertGlobal("dummy_cast", Int8Ty);
  87   EXPECT_EQ(1u, DummyCast1->getType()->getPointerAddressSpace());
  88   EXPECT_NE(DummyCast0, DummyCast1) << *DummyCast1;
  89 }
  90
  91 #ifdef GTEST_HAS_DEATH_TEST
  92 #ifndef NDEBUG
  93 TEST(GlobalTest, AlignDeath) {
  94   LLVMContext Ctx;
  95   std::unique_ptr<Module> M(new Module("TestModule", Ctx));
  96   Type *Int32Ty = Type::getInt32Ty(Ctx);
  97   GlobalVariable *Var =
  98       new GlobalVariable(*M, Int32Ty, true, GlobalValue::ExternalLinkage,
  99                          Constant::getAllOnesValue(Int32Ty), "var", nullptr,
 100                          GlobalVariable::NotThreadLocal, 1);
 101
 102   EXPECT_DEATH(Var->setAlignment(536870913U),
 103                "Alignment is neither 0 nor 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