ValueTest.cpp
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//===- llvm/unittest/IR/ValueTest.cpp - Value unit tests ------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/Value.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/ModuleSlotTracker.h"
#include "llvm/Support/SourceMgr.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
TEST(ValueTest, UsedInBasicBlock) {
LLVMContext C;
const char *ModuleString = "define void @f(i32 %x, i32 %y) {\n"
"bb0:\n"
" %y1 = add i32 %y, 1\n"
" %y2 = add i32 %y, 1\n"
" %y3 = add i32 %y, 1\n"
" %y4 = add i32 %y, 1\n"
" %y5 = add i32 %y, 1\n"
" %y6 = add i32 %y, 1\n"
" %y7 = add i32 %y, 1\n"
" %y8 = add i32 %x, 1\n"
" ret void\n"
"}\n";
SMDiagnostic Err;
std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
Function *F = M->getFunction("f");
EXPECT_FALSE(F->isUsedInBasicBlock(&F->front()));
EXPECT_TRUE(std::next(F->arg_begin())->isUsedInBasicBlock(&F->front()));
EXPECT_TRUE(F->arg_begin()->isUsedInBasicBlock(&F->front()));
}
TEST(GlobalTest, CreateAddressSpace) {
LLVMContext Ctx;
std::unique_ptr<Module> M(new Module("TestModule", Ctx));
Type *Int8Ty = Type::getInt8Ty(Ctx);
Type *Int32Ty = Type::getInt32Ty(Ctx);
GlobalVariable *Dummy0
= new GlobalVariable(*M,
Int32Ty,
true,
GlobalValue::ExternalLinkage,
Constant::getAllOnesValue(Int32Ty),
"dummy",
nullptr,
GlobalVariable::NotThreadLocal,
1);
EXPECT_TRUE(Value::MaximumAlignment == 536870912U);
Dummy0->setAlignment(Align(536870912));
EXPECT_EQ(Dummy0->getAlignment(), 536870912U);
// Make sure the address space isn't dropped when returning this.
Constant *Dummy1 = M->getOrInsertGlobal("dummy", Int32Ty);
EXPECT_EQ(Dummy0, Dummy1);
EXPECT_EQ(1u, Dummy1->getType()->getPointerAddressSpace());
// This one requires a bitcast, but the address space must also stay the same.
GlobalVariable *DummyCast0
= new GlobalVariable(*M,
Int32Ty,
true,
GlobalValue::ExternalLinkage,
Constant::getAllOnesValue(Int32Ty),
"dummy_cast",
nullptr,
GlobalVariable::NotThreadLocal,
1);
// Make sure the address space isn't dropped when returning this.
Constant *DummyCast1 = M->getOrInsertGlobal("dummy_cast", Int8Ty);
EXPECT_EQ(1u, DummyCast1->getType()->getPointerAddressSpace());
EXPECT_NE(DummyCast0, DummyCast1) << *DummyCast1;
}
#ifdef GTEST_HAS_DEATH_TEST
#ifndef NDEBUG
TEST(GlobalTest, AlignDeath) {
LLVMContext Ctx;
std::unique_ptr<Module> M(new Module("TestModule", Ctx));
Type *Int32Ty = Type::getInt32Ty(Ctx);
GlobalVariable *Var =
new GlobalVariable(*M, Int32Ty, true, GlobalValue::ExternalLinkage,
Constant::getAllOnesValue(Int32Ty), "var", nullptr,
GlobalVariable::NotThreadLocal, 1);
EXPECT_DEATH(Var->setAlignment(Align(1073741824U)),
"Alignment is greater than MaximumAlignment");
}
#endif
#endif
TEST(ValueTest, printSlots) {
// Check that Value::print() and Value::printAsOperand() work with and
// without a slot tracker.
LLVMContext C;
const char *ModuleString = "@g0 = external global %500\n"
"@g1 = external global %900\n"
"\n"
"%900 = type { i32, i32 }\n"
"%500 = type { i32 }\n"
"\n"
"define void @f(i32 %x, i32 %y) {\n"
"entry:\n"
" %0 = add i32 %y, 1\n"
" %1 = add i32 %y, 1\n"
" ret void\n"
"}\n";
SMDiagnostic Err;
std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
Function *F = M->getFunction("f");
ASSERT_TRUE(F);
ASSERT_FALSE(F->empty());
BasicBlock &BB = F->getEntryBlock();
ASSERT_EQ(3u, BB.size());
Instruction *I0 = &*BB.begin();
ASSERT_TRUE(I0);
Instruction *I1 = &*++BB.begin();
ASSERT_TRUE(I1);
GlobalVariable *G0 = M->getGlobalVariable("g0");
ASSERT_TRUE(G0);
GlobalVariable *G1 = M->getGlobalVariable("g1");
ASSERT_TRUE(G1);
ModuleSlotTracker MST(M.get());
#define CHECK_PRINT(INST, STR) \
do { \
{ \
std::string S; \
raw_string_ostream OS(S); \
INST->print(OS); \
EXPECT_EQ(STR, OS.str()); \
} \
{ \
std::string S; \
raw_string_ostream OS(S); \
INST->print(OS, MST); \
EXPECT_EQ(STR, OS.str()); \
} \
} while (false)
CHECK_PRINT(I0, " %0 = add i32 %y, 1");
CHECK_PRINT(I1, " %1 = add i32 %y, 1");
#undef CHECK_PRINT
#define CHECK_PRINT_AS_OPERAND(INST, TYPE, STR) \
do { \
{ \
std::string S; \
raw_string_ostream OS(S); \
INST->printAsOperand(OS, TYPE); \
EXPECT_EQ(StringRef(STR), StringRef(OS.str())); \
} \
{ \
std::string S; \
raw_string_ostream OS(S); \
INST->printAsOperand(OS, TYPE, MST); \
EXPECT_EQ(StringRef(STR), StringRef(OS.str())); \
} \
} while (false)
CHECK_PRINT_AS_OPERAND(I0, false, "%0");
CHECK_PRINT_AS_OPERAND(I1, false, "%1");
CHECK_PRINT_AS_OPERAND(I0, true, "i32 %0");
CHECK_PRINT_AS_OPERAND(I1, true, "i32 %1");
CHECK_PRINT_AS_OPERAND(G0, true, "%0* @g0");
CHECK_PRINT_AS_OPERAND(G1, true, "%1* @g1");
#undef CHECK_PRINT_AS_OPERAND
}
TEST(ValueTest, getLocalSlots) {
// Verify that the getLocalSlot method returns the correct slot numbers.
LLVMContext C;
const char *ModuleString = "define void @f(i32 %x, i32 %y) {\n"
"entry:\n"
" %0 = add i32 %y, 1\n"
" %1 = add i32 %y, 1\n"
" br label %2\n"
"\n"
" ret void\n"
"}\n";
SMDiagnostic Err;
std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
Function *F = M->getFunction("f");
ASSERT_TRUE(F);
ASSERT_FALSE(F->empty());
BasicBlock &EntryBB = F->getEntryBlock();
ASSERT_EQ(3u, EntryBB.size());
BasicBlock *BB2 = &*++F->begin();
ASSERT_TRUE(BB2);
Instruction *I0 = &*EntryBB.begin();
ASSERT_TRUE(I0);
Instruction *I1 = &*++EntryBB.begin();
ASSERT_TRUE(I1);
ModuleSlotTracker MST(M.get());
MST.incorporateFunction(*F);
EXPECT_EQ(MST.getLocalSlot(I0), 0);
EXPECT_EQ(MST.getLocalSlot(I1), 1);
EXPECT_EQ(MST.getLocalSlot(&EntryBB), -1);
EXPECT_EQ(MST.getLocalSlot(BB2), 2);
}
#if defined(GTEST_HAS_DEATH_TEST) && !defined(NDEBUG)
TEST(ValueTest, getLocalSlotDeath) {
LLVMContext C;
const char *ModuleString = "define void @f(i32 %x, i32 %y) {\n"
"entry:\n"
" %0 = add i32 %y, 1\n"
" %1 = add i32 %y, 1\n"
" br label %2\n"
"\n"
" ret void\n"
"}\n";
SMDiagnostic Err;
std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
Function *F = M->getFunction("f");
ASSERT_TRUE(F);
ASSERT_FALSE(F->empty());
BasicBlock *BB2 = &*++F->begin();
ASSERT_TRUE(BB2);
ModuleSlotTracker MST(M.get());
EXPECT_DEATH(MST.getLocalSlot(BB2), "No function incorporated");
}
#endif
} // end anonymous namespace