1
//===- Cloning.cpp - Unit tests for the Cloner ----------------------------===//
3
// The LLVM Compiler Infrastructure
5
// This file is distributed under the University of Illinois Open Source
6
// License. See LICENSE.TXT for details.
8
//===----------------------------------------------------------------------===//
10
#include "llvm/Transforms/Utils/Cloning.h"
11
#include "llvm/ADT/ArrayRef.h"
12
#include "llvm/ADT/STLExtras.h"
13
#include "llvm/ADT/SmallPtrSet.h"
14
#include "llvm/IR/Argument.h"
15
#include "llvm/IR/Constant.h"
16
#include "llvm/IR/DIBuilder.h"
17
#include "llvm/IR/DebugInfo.h"
18
#include "llvm/IR/Function.h"
19
#include "llvm/IR/IRBuilder.h"
20
#include "llvm/IR/InstIterator.h"
21
#include "llvm/IR/Instructions.h"
22
#include "llvm/IR/IntrinsicInst.h"
23
#include "llvm/IR/LLVMContext.h"
24
#include "llvm/IR/Module.h"
25
#include "llvm/IR/Verifier.h"
26
#include "gtest/gtest.h"
32
class CloneInstruction : public ::testing::Test {
34
void SetUp() override { V = nullptr; }
38
Value *V2 = V1->clone();
45
DeleteContainerPointers(Clones);
48
void TearDown() override {
50
DeleteContainerPointers(Orig);
54
SmallPtrSet<Value *, 4> Orig; // Erase on exit
55
SmallPtrSet<Value *, 4> Clones; // Erase in eraseClones
61
TEST_F(CloneInstruction, OverflowBits) {
62
V = new Argument(Type::getInt32Ty(context));
64
BinaryOperator *Add = BinaryOperator::Create(Instruction::Add, V, V);
65
BinaryOperator *Sub = BinaryOperator::Create(Instruction::Sub, V, V);
66
BinaryOperator *Mul = BinaryOperator::Create(Instruction::Mul, V, V);
68
BinaryOperator *AddClone = this->clone(Add);
69
BinaryOperator *SubClone = this->clone(Sub);
70
BinaryOperator *MulClone = this->clone(Mul);
72
EXPECT_FALSE(AddClone->hasNoUnsignedWrap());
73
EXPECT_FALSE(AddClone->hasNoSignedWrap());
74
EXPECT_FALSE(SubClone->hasNoUnsignedWrap());
75
EXPECT_FALSE(SubClone->hasNoSignedWrap());
76
EXPECT_FALSE(MulClone->hasNoUnsignedWrap());
77
EXPECT_FALSE(MulClone->hasNoSignedWrap());
81
Add->setHasNoUnsignedWrap();
82
Sub->setHasNoUnsignedWrap();
83
Mul->setHasNoUnsignedWrap();
85
AddClone = this->clone(Add);
86
SubClone = this->clone(Sub);
87
MulClone = this->clone(Mul);
89
EXPECT_TRUE(AddClone->hasNoUnsignedWrap());
90
EXPECT_FALSE(AddClone->hasNoSignedWrap());
91
EXPECT_TRUE(SubClone->hasNoUnsignedWrap());
92
EXPECT_FALSE(SubClone->hasNoSignedWrap());
93
EXPECT_TRUE(MulClone->hasNoUnsignedWrap());
94
EXPECT_FALSE(MulClone->hasNoSignedWrap());
98
Add->setHasNoSignedWrap();
99
Sub->setHasNoSignedWrap();
100
Mul->setHasNoSignedWrap();
102
AddClone = this->clone(Add);
103
SubClone = this->clone(Sub);
104
MulClone = this->clone(Mul);
106
EXPECT_TRUE(AddClone->hasNoUnsignedWrap());
107
EXPECT_TRUE(AddClone->hasNoSignedWrap());
108
EXPECT_TRUE(SubClone->hasNoUnsignedWrap());
109
EXPECT_TRUE(SubClone->hasNoSignedWrap());
110
EXPECT_TRUE(MulClone->hasNoUnsignedWrap());
111
EXPECT_TRUE(MulClone->hasNoSignedWrap());
115
Add->setHasNoUnsignedWrap(false);
116
Sub->setHasNoUnsignedWrap(false);
117
Mul->setHasNoUnsignedWrap(false);
119
AddClone = this->clone(Add);
120
SubClone = this->clone(Sub);
121
MulClone = this->clone(Mul);
123
EXPECT_FALSE(AddClone->hasNoUnsignedWrap());
124
EXPECT_TRUE(AddClone->hasNoSignedWrap());
125
EXPECT_FALSE(SubClone->hasNoUnsignedWrap());
126
EXPECT_TRUE(SubClone->hasNoSignedWrap());
127
EXPECT_FALSE(MulClone->hasNoUnsignedWrap());
128
EXPECT_TRUE(MulClone->hasNoSignedWrap());
131
TEST_F(CloneInstruction, Inbounds) {
132
V = new Argument(Type::getInt32PtrTy(context));
134
Constant *Z = Constant::getNullValue(Type::getInt32Ty(context));
135
std::vector<Value *> ops;
137
GetElementPtrInst *GEP =
138
GetElementPtrInst::Create(Type::getInt32Ty(context), V, ops);
139
EXPECT_FALSE(this->clone(GEP)->isInBounds());
141
GEP->setIsInBounds();
142
EXPECT_TRUE(this->clone(GEP)->isInBounds());
145
TEST_F(CloneInstruction, Exact) {
146
V = new Argument(Type::getInt32Ty(context));
148
BinaryOperator *SDiv = BinaryOperator::Create(Instruction::SDiv, V, V);
149
EXPECT_FALSE(this->clone(SDiv)->isExact());
151
SDiv->setIsExact(true);
152
EXPECT_TRUE(this->clone(SDiv)->isExact());
155
TEST_F(CloneInstruction, Attributes) {
156
Type *ArgTy1[] = { Type::getInt32PtrTy(context) };
157
FunctionType *FT1 = FunctionType::get(Type::getVoidTy(context), ArgTy1, false);
159
Function *F1 = Function::Create(FT1, Function::ExternalLinkage);
160
BasicBlock *BB = BasicBlock::Create(context, "", F1);
161
IRBuilder<> Builder(BB);
162
Builder.CreateRetVoid();
164
Function *F2 = Function::Create(FT1, Function::ExternalLinkage);
166
Attribute::AttrKind AK[] = { Attribute::NoCapture };
167
AttributeSet AS = AttributeSet::get(context, 0, AK);
168
Argument *A = F1->arg_begin();
171
SmallVector<ReturnInst*, 4> Returns;
172
ValueToValueMapTy VMap;
173
VMap[A] = UndefValue::get(A->getType());
175
CloneFunctionInto(F2, F1, VMap, false, Returns);
176
EXPECT_FALSE(F2->arg_begin()->hasNoCaptureAttr());
182
TEST_F(CloneInstruction, CallingConvention) {
183
Type *ArgTy1[] = { Type::getInt32PtrTy(context) };
184
FunctionType *FT1 = FunctionType::get(Type::getVoidTy(context), ArgTy1, false);
186
Function *F1 = Function::Create(FT1, Function::ExternalLinkage);
187
F1->setCallingConv(CallingConv::Cold);
188
BasicBlock *BB = BasicBlock::Create(context, "", F1);
189
IRBuilder<> Builder(BB);
190
Builder.CreateRetVoid();
192
Function *F2 = Function::Create(FT1, Function::ExternalLinkage);
194
SmallVector<ReturnInst*, 4> Returns;
195
ValueToValueMapTy VMap;
196
VMap[F1->arg_begin()] = F2->arg_begin();
198
CloneFunctionInto(F2, F1, VMap, false, Returns);
199
EXPECT_EQ(CallingConv::Cold, F2->getCallingConv());
205
class CloneFunc : public ::testing::Test {
207
void SetUp() override {
214
void TearDown() override { delete Finder; }
217
M = new Module("", C);
220
void CreateOldFunc() {
221
FunctionType* FuncType = FunctionType::get(Type::getVoidTy(C), false);
222
OldFunc = Function::Create(FuncType, GlobalValue::PrivateLinkage, "f", M);
223
CreateOldFunctionBodyAndDI();
226
void CreateOldFunctionBodyAndDI() {
227
DIBuilder DBuilder(*M);
228
IRBuilder<> IBuilder(C);
231
auto *File = DBuilder.createFile("filename.c", "/file/dir/");
232
DITypeRefArray ParamTypes = DBuilder.getOrCreateTypeArray(None);
233
DISubroutineType *FuncType =
234
DBuilder.createSubroutineType(File, ParamTypes);
236
DBuilder.createCompileUnit(dwarf::DW_LANG_C99, "filename.c",
237
"/file/dir", "CloneFunc", false, "", 0);
239
auto *Subprogram = DBuilder.createFunction(
240
CU, "f", "f", File, 4, FuncType, true, true, 3, 0, false, OldFunc);
243
BasicBlock* Entry = BasicBlock::Create(C, "", OldFunc);
244
IBuilder.SetInsertPoint(Entry);
245
DebugLoc Loc = DebugLoc::get(3, 2, Subprogram);
246
IBuilder.SetCurrentDebugLocation(Loc);
247
AllocaInst* Alloca = IBuilder.CreateAlloca(IntegerType::getInt32Ty(C));
248
IBuilder.SetCurrentDebugLocation(DebugLoc::get(4, 2, Subprogram));
249
Value* AllocaContent = IBuilder.getInt32(1);
250
Instruction* Store = IBuilder.CreateStore(AllocaContent, Alloca);
251
IBuilder.SetCurrentDebugLocation(DebugLoc::get(5, 2, Subprogram));
252
Instruction* Terminator = IBuilder.CreateRetVoid();
254
// Create a local variable around the alloca
256
DBuilder.createBasicType("int", 32, 0, dwarf::DW_ATE_signed);
257
auto *E = DBuilder.createExpression();
258
auto *Variable = DBuilder.createLocalVariable(
259
dwarf::DW_TAG_auto_variable, Subprogram, "x", File, 5, IntType, true);
260
auto *DL = DILocation::get(Subprogram->getContext(), 5, 0, Subprogram);
261
DBuilder.insertDeclare(Alloca, Variable, E, DL, Store);
262
DBuilder.insertDbgValueIntrinsic(AllocaContent, 0, Variable, E, DL,
264
// Finalize the debug info
268
// Create another, empty, compile unit
269
DIBuilder DBuilder2(*M);
270
DBuilder2.createCompileUnit(dwarf::DW_LANG_C99,
271
"extra.c", "/file/dir", "CloneFunc", false, "", 0);
272
DBuilder2.finalize();
275
void CreateNewFunc() {
276
ValueToValueMapTy VMap;
277
NewFunc = CloneFunction(OldFunc, VMap, true, nullptr);
278
M->getFunctionList().push_back(NewFunc);
282
Finder = new DebugInfoFinder();
283
Finder->processModule(*M);
290
DebugInfoFinder* Finder;
293
// Test that a new, distinct function was created.
294
TEST_F(CloneFunc, NewFunctionCreated) {
295
EXPECT_NE(OldFunc, NewFunc);
298
// Test that a new subprogram entry was added and is pointing to the new
299
// function, while the original subprogram still points to the old one.
300
TEST_F(CloneFunc, Subprogram) {
301
EXPECT_FALSE(verifyModule(*M));
303
unsigned SubprogramCount = Finder->subprogram_count();
304
EXPECT_EQ(2U, SubprogramCount);
306
auto Iter = Finder->subprograms().begin();
307
auto *Sub1 = cast<DISubprogram>(*Iter);
309
auto *Sub2 = cast<DISubprogram>(*Iter);
312
(Sub1->getFunction() == OldFunc && Sub2->getFunction() == NewFunc) ||
313
(Sub1->getFunction() == NewFunc && Sub2->getFunction() == OldFunc));
316
// Test that the new subprogram entry was not added to the CU which doesn't
317
// contain the old subprogram entry.
318
TEST_F(CloneFunc, SubprogramInRightCU) {
319
EXPECT_FALSE(verifyModule(*M));
321
EXPECT_EQ(2U, Finder->compile_unit_count());
323
auto Iter = Finder->compile_units().begin();
324
auto *CU1 = cast<DICompileUnit>(*Iter);
326
auto *CU2 = cast<DICompileUnit>(*Iter);
327
EXPECT_TRUE(CU1->getSubprograms().size() == 0 ||
328
CU2->getSubprograms().size() == 0);
331
// Test that instructions in the old function still belong to it in the
332
// metadata, while instruction in the new function belong to the new one.
333
TEST_F(CloneFunc, InstructionOwnership) {
334
EXPECT_FALSE(verifyModule(*M));
336
inst_iterator OldIter = inst_begin(OldFunc);
337
inst_iterator OldEnd = inst_end(OldFunc);
338
inst_iterator NewIter = inst_begin(NewFunc);
339
inst_iterator NewEnd = inst_end(NewFunc);
340
while (OldIter != OldEnd && NewIter != NewEnd) {
341
Instruction& OldI = *OldIter;
342
Instruction& NewI = *NewIter;
343
EXPECT_NE(&OldI, &NewI);
345
EXPECT_EQ(OldI.hasMetadata(), NewI.hasMetadata());
346
if (OldI.hasMetadata()) {
347
const DebugLoc& OldDL = OldI.getDebugLoc();
348
const DebugLoc& NewDL = NewI.getDebugLoc();
350
// Verify that the debug location data is the same
351
EXPECT_EQ(OldDL.getLine(), NewDL.getLine());
352
EXPECT_EQ(OldDL.getCol(), NewDL.getCol());
354
// But that they belong to different functions
355
auto *OldSubprogram = cast<DISubprogram>(OldDL.getScope());
356
auto *NewSubprogram = cast<DISubprogram>(NewDL.getScope());
357
EXPECT_EQ(OldFunc, OldSubprogram->getFunction());
358
EXPECT_EQ(NewFunc, NewSubprogram->getFunction());
364
EXPECT_EQ(OldEnd, OldIter);
365
EXPECT_EQ(NewEnd, NewIter);
368
// Test that the arguments for debug intrinsics in the new function were
370
TEST_F(CloneFunc, DebugIntrinsics) {
371
EXPECT_FALSE(verifyModule(*M));
373
inst_iterator OldIter = inst_begin(OldFunc);
374
inst_iterator OldEnd = inst_end(OldFunc);
375
inst_iterator NewIter = inst_begin(NewFunc);
376
inst_iterator NewEnd = inst_end(NewFunc);
377
while (OldIter != OldEnd && NewIter != NewEnd) {
378
Instruction& OldI = *OldIter;
379
Instruction& NewI = *NewIter;
380
if (DbgDeclareInst* OldIntrin = dyn_cast<DbgDeclareInst>(&OldI)) {
381
DbgDeclareInst* NewIntrin = dyn_cast<DbgDeclareInst>(&NewI);
382
EXPECT_TRUE(NewIntrin);
384
// Old address must belong to the old function
385
EXPECT_EQ(OldFunc, cast<AllocaInst>(OldIntrin->getAddress())->
386
getParent()->getParent());
387
// New address must belong to the new function
388
EXPECT_EQ(NewFunc, cast<AllocaInst>(NewIntrin->getAddress())->
389
getParent()->getParent());
391
// Old variable must belong to the old function
393
cast<DISubprogram>(OldIntrin->getVariable()->getScope())
395
// New variable must belong to the New function
397
cast<DISubprogram>(NewIntrin->getVariable()->getScope())
399
} else if (DbgValueInst* OldIntrin = dyn_cast<DbgValueInst>(&OldI)) {
400
DbgValueInst* NewIntrin = dyn_cast<DbgValueInst>(&NewI);
401
EXPECT_TRUE(NewIntrin);
403
// Old variable must belong to the old function
405
cast<DISubprogram>(OldIntrin->getVariable()->getScope())
407
// New variable must belong to the New function
409
cast<DISubprogram>(NewIntrin->getVariable()->getScope())
418
class CloneModule : public ::testing::Test {
420
void SetUp() override {
426
void SetupModule() { OldM = new Module("", C); }
428
void CreateOldModule() {
429
IRBuilder<> IBuilder(C);
431
auto *FuncType = FunctionType::get(Type::getVoidTy(C), false);
432
auto *PersFn = Function::Create(FuncType, GlobalValue::ExternalLinkage,
435
Function::Create(FuncType, GlobalValue::PrivateLinkage, "f", OldM);
436
F->setPersonalityFn(PersFn);
437
auto *Entry = BasicBlock::Create(C, "", F);
438
IBuilder.SetInsertPoint(Entry);
439
IBuilder.CreateRetVoid();
442
void CreateNewModule() { NewM = llvm::CloneModule(OldM); }
449
TEST_F(CloneModule, Verify) {
450
EXPECT_FALSE(verifyModule(*NewM));