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 252