1 //===- llvm/unittest/IR/ConstantsTest.cpp - Constants 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/Constants.h"
10 #include "llvm-c/Core.h"
11 #include "llvm/AsmParser/Parser.h"
12 #include "llvm/IR/DerivedTypes.h"
13 #include "llvm/IR/InstrTypes.h"
14 #include "llvm/IR/Instruction.h"
15 #include "llvm/IR/LLVMContext.h"
16 #include "llvm/IR/Module.h"
17 #include "llvm/Support/SourceMgr.h"
18 #include "gtest/gtest.h"
19
20 namespace llvm {
21 namespace {
22
TEST(ConstantsTest,Integer_i1)23 TEST(ConstantsTest, Integer_i1) {
24 LLVMContext Context;
25 IntegerType *Int1 = IntegerType::get(Context, 1);
26 Constant* One = ConstantInt::get(Int1, 1, true);
27 Constant* Zero = ConstantInt::get(Int1, 0);
28 Constant* NegOne = ConstantInt::get(Int1, static_cast<uint64_t>(-1), true);
29 EXPECT_EQ(NegOne, ConstantInt::getSigned(Int1, -1));
30 Constant* Undef = UndefValue::get(Int1);
31
32 // Input: @b = constant i1 add(i1 1 , i1 1)
33 // Output: @b = constant i1 false
34 EXPECT_EQ(Zero, ConstantExpr::getAdd(One, One));
35
36 // @c = constant i1 add(i1 -1, i1 1)
37 // @c = constant i1 false
38 EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, One));
39
40 // @d = constant i1 add(i1 -1, i1 -1)
41 // @d = constant i1 false
42 EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, NegOne));
43
44 // @e = constant i1 sub(i1 -1, i1 1)
45 // @e = constant i1 false
46 EXPECT_EQ(Zero, ConstantExpr::getSub(NegOne, One));
47
48 // @f = constant i1 sub(i1 1 , i1 -1)
49 // @f = constant i1 false
50 EXPECT_EQ(Zero, ConstantExpr::getSub(One, NegOne));
51
52 // @g = constant i1 sub(i1 1 , i1 1)
53 // @g = constant i1 false
54 EXPECT_EQ(Zero, ConstantExpr::getSub(One, One));
55
56 // @h = constant i1 shl(i1 1 , i1 1) ; undefined
57 // @h = constant i1 undef
58 EXPECT_EQ(Undef, ConstantExpr::getShl(One, One));
59
60 // @i = constant i1 shl(i1 1 , i1 0)
61 // @i = constant i1 true
62 EXPECT_EQ(One, ConstantExpr::getShl(One, Zero));
63
64 // @j = constant i1 lshr(i1 1, i1 1) ; undefined
65 // @j = constant i1 undef
66 EXPECT_EQ(Undef, ConstantExpr::getLShr(One, One));
67
68 // @m = constant i1 ashr(i1 1, i1 1) ; undefined
69 // @m = constant i1 undef
70 EXPECT_EQ(Undef, ConstantExpr::getAShr(One, One));
71
72 // @n = constant i1 mul(i1 -1, i1 1)
73 // @n = constant i1 true
74 EXPECT_EQ(One, ConstantExpr::getMul(NegOne, One));
75
76 // @o = constant i1 sdiv(i1 -1, i1 1) ; overflow
77 // @o = constant i1 true
78 EXPECT_EQ(One, ConstantExpr::getSDiv(NegOne, One));
79
80 // @p = constant i1 sdiv(i1 1 , i1 -1); overflow
81 // @p = constant i1 true
82 EXPECT_EQ(One, ConstantExpr::getSDiv(One, NegOne));
83
84 // @q = constant i1 udiv(i1 -1, i1 1)
85 // @q = constant i1 true
86 EXPECT_EQ(One, ConstantExpr::getUDiv(NegOne, One));
87
88 // @r = constant i1 udiv(i1 1, i1 -1)
89 // @r = constant i1 true
90 EXPECT_EQ(One, ConstantExpr::getUDiv(One, NegOne));
91
92 // @s = constant i1 srem(i1 -1, i1 1) ; overflow
93 // @s = constant i1 false
94 EXPECT_EQ(Zero, ConstantExpr::getSRem(NegOne, One));
95
96 // @t = constant i1 urem(i1 -1, i1 1)
97 // @t = constant i1 false
98 EXPECT_EQ(Zero, ConstantExpr::getURem(NegOne, One));
99
100 // @u = constant i1 srem(i1 1, i1 -1) ; overflow
101 // @u = constant i1 false
102 EXPECT_EQ(Zero, ConstantExpr::getSRem(One, NegOne));
103 }
104
TEST(ConstantsTest,IntSigns)105 TEST(ConstantsTest, IntSigns) {
106 LLVMContext Context;
107 IntegerType *Int8Ty = Type::getInt8Ty(Context);
108 EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, false)->getSExtValue());
109 EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, true)->getSExtValue());
110 EXPECT_EQ(100, ConstantInt::getSigned(Int8Ty, 100)->getSExtValue());
111 EXPECT_EQ(-50, ConstantInt::get(Int8Ty, 206)->getSExtValue());
112 EXPECT_EQ(-50, ConstantInt::getSigned(Int8Ty, -50)->getSExtValue());
113 EXPECT_EQ(206U, ConstantInt::getSigned(Int8Ty, -50)->getZExtValue());
114
115 // Overflow is handled by truncation.
116 EXPECT_EQ(0x3b, ConstantInt::get(Int8Ty, 0x13b)->getSExtValue());
117 }
118
TEST(ConstantsTest,FP128Test)119 TEST(ConstantsTest, FP128Test) {
120 LLVMContext Context;
121 Type *FP128Ty = Type::getFP128Ty(Context);
122
123 IntegerType *Int128Ty = Type::getIntNTy(Context, 128);
124 Constant *Zero128 = Constant::getNullValue(Int128Ty);
125 Constant *X = ConstantExpr::getUIToFP(Zero128, FP128Ty);
126 EXPECT_TRUE(isa<ConstantFP>(X));
127 }
128
TEST(ConstantsTest,PointerCast)129 TEST(ConstantsTest, PointerCast) {
130 LLVMContext C;
131 Type *Int8PtrTy = Type::getInt8PtrTy(C);
132 Type *Int32PtrTy = Type::getInt32PtrTy(C);
133 Type *Int64Ty = Type::getInt64Ty(C);
134 VectorType *Int8PtrVecTy = FixedVectorType::get(Int8PtrTy, 4);
135 VectorType *Int32PtrVecTy = FixedVectorType::get(Int32PtrTy, 4);
136 VectorType *Int64VecTy = FixedVectorType::get(Int64Ty, 4);
137
138 // ptrtoint i8* to i64
139 EXPECT_EQ(Constant::getNullValue(Int64Ty),
140 ConstantExpr::getPointerCast(
141 Constant::getNullValue(Int8PtrTy), Int64Ty));
142
143 // bitcast i8* to i32*
144 EXPECT_EQ(Constant::getNullValue(Int32PtrTy),
145 ConstantExpr::getPointerCast(
146 Constant::getNullValue(Int8PtrTy), Int32PtrTy));
147
148 // ptrtoint <4 x i8*> to <4 x i64>
149 EXPECT_EQ(Constant::getNullValue(Int64VecTy),
150 ConstantExpr::getPointerCast(
151 Constant::getNullValue(Int8PtrVecTy), Int64VecTy));
152
153 // bitcast <4 x i8*> to <4 x i32*>
154 EXPECT_EQ(Constant::getNullValue(Int32PtrVecTy),
155 ConstantExpr::getPointerCast(
156 Constant::getNullValue(Int8PtrVecTy), Int32PtrVecTy));
157
158 Type *Int32Ptr1Ty = Type::getInt32PtrTy(C, 1);
159 ConstantInt *K = ConstantInt::get(Type::getInt64Ty(C), 1234);
160
161 // Make sure that addrspacecast of inttoptr is not folded away.
162 EXPECT_NE(K,
163 ConstantExpr::getAddrSpaceCast(
164 ConstantExpr::getIntToPtr(K, Int32PtrTy), Int32Ptr1Ty));
165 EXPECT_NE(K,
166 ConstantExpr::getAddrSpaceCast(
167 ConstantExpr::getIntToPtr(K, Int32Ptr1Ty), Int32PtrTy));
168
169 Constant *NullInt32Ptr0 = Constant::getNullValue(Int32PtrTy);
170 Constant *NullInt32Ptr1 = Constant::getNullValue(Int32Ptr1Ty);
171
172 // Make sure that addrspacecast of null is not folded away.
173 EXPECT_NE(Constant::getNullValue(Int32PtrTy),
174 ConstantExpr::getAddrSpaceCast(NullInt32Ptr0, Int32Ptr1Ty));
175
176 EXPECT_NE(Constant::getNullValue(Int32Ptr1Ty),
177 ConstantExpr::getAddrSpaceCast(NullInt32Ptr1, Int32PtrTy));
178 }
179
180 #define CHECK(x, y) \
181 { \
182 std::string __s; \
183 raw_string_ostream __o(__s); \
184 Instruction *__I = cast<ConstantExpr>(x)->getAsInstruction(); \
185 __I->print(__o); \
186 __I->deleteValue(); \
187 __o.flush(); \
188 EXPECT_EQ(std::string(" <badref> = " y), __s); \
189 }
190
TEST(ConstantsTest,AsInstructionsTest)191 TEST(ConstantsTest, AsInstructionsTest) {
192 LLVMContext Context;
193 std::unique_ptr<Module> M(new Module("MyModule", Context));
194
195 Type *Int64Ty = Type::getInt64Ty(Context);
196 Type *Int32Ty = Type::getInt32Ty(Context);
197 Type *Int16Ty = Type::getInt16Ty(Context);
198 Type *Int1Ty = Type::getInt1Ty(Context);
199 Type *FloatTy = Type::getFloatTy(Context);
200 Type *DoubleTy = Type::getDoubleTy(Context);
201
202 Constant *Global = M->getOrInsertGlobal("dummy",
203 PointerType::getUnqual(Int32Ty));
204 Constant *Global2 = M->getOrInsertGlobal("dummy2",
205 PointerType::getUnqual(Int32Ty));
206
207 Constant *P0 = ConstantExpr::getPtrToInt(Global, Int32Ty);
208 Constant *P1 = ConstantExpr::getUIToFP(P0, FloatTy);
209 Constant *P2 = ConstantExpr::getUIToFP(P0, DoubleTy);
210 Constant *P3 = ConstantExpr::getTrunc(P0, Int1Ty);
211 Constant *P4 = ConstantExpr::getPtrToInt(Global2, Int32Ty);
212 Constant *P5 = ConstantExpr::getUIToFP(P4, FloatTy);
213 Constant *P6 = ConstantExpr::getBitCast(P4, FixedVectorType::get(Int16Ty, 2));
214
215 Constant *One = ConstantInt::get(Int32Ty, 1);
216 Constant *Two = ConstantInt::get(Int64Ty, 2);
217 Constant *Big = ConstantInt::get(Context, APInt{256, uint64_t(-1), true});
218 Constant *Elt = ConstantInt::get(Int16Ty, 2015);
219 Constant *Undef16 = UndefValue::get(Int16Ty);
220 Constant *Undef64 = UndefValue::get(Int64Ty);
221 Constant *UndefV16 = UndefValue::get(P6->getType());
222
223 #define P0STR "ptrtoint (i32** @dummy to i32)"
224 #define P1STR "uitofp (i32 ptrtoint (i32** @dummy to i32) to float)"
225 #define P2STR "uitofp (i32 ptrtoint (i32** @dummy to i32) to double)"
226 #define P3STR "ptrtoint (i32** @dummy to i1)"
227 #define P4STR "ptrtoint (i32** @dummy2 to i32)"
228 #define P5STR "uitofp (i32 ptrtoint (i32** @dummy2 to i32) to float)"
229 #define P6STR "bitcast (i32 ptrtoint (i32** @dummy2 to i32) to <2 x i16>)"
230
231 CHECK(ConstantExpr::getNeg(P0), "sub i32 0, " P0STR);
232 CHECK(ConstantExpr::getFNeg(P1), "fneg float " P1STR);
233 CHECK(ConstantExpr::getNot(P0), "xor i32 " P0STR ", -1");
234 CHECK(ConstantExpr::getAdd(P0, P0), "add i32 " P0STR ", " P0STR);
235 CHECK(ConstantExpr::getAdd(P0, P0, false, true), "add nsw i32 " P0STR ", "
236 P0STR);
237 CHECK(ConstantExpr::getAdd(P0, P0, true, true), "add nuw nsw i32 " P0STR ", "
238 P0STR);
239 CHECK(ConstantExpr::getFAdd(P1, P1), "fadd float " P1STR ", " P1STR);
240 CHECK(ConstantExpr::getSub(P0, P0), "sub i32 " P0STR ", " P0STR);
241 CHECK(ConstantExpr::getFSub(P1, P1), "fsub float " P1STR ", " P1STR);
242 CHECK(ConstantExpr::getMul(P0, P0), "mul i32 " P0STR ", " P0STR);
243 CHECK(ConstantExpr::getFMul(P1, P1), "fmul float " P1STR ", " P1STR);
244 CHECK(ConstantExpr::getUDiv(P0, P0), "udiv i32 " P0STR ", " P0STR);
245 CHECK(ConstantExpr::getSDiv(P0, P0), "sdiv i32 " P0STR ", " P0STR);
246 CHECK(ConstantExpr::getFDiv(P1, P1), "fdiv float " P1STR ", " P1STR);
247 CHECK(ConstantExpr::getURem(P0, P0), "urem i32 " P0STR ", " P0STR);
248 CHECK(ConstantExpr::getSRem(P0, P0), "srem i32 " P0STR ", " P0STR);
249 CHECK(ConstantExpr::getFRem(P1, P1), "frem float " P1STR ", " P1STR);
250 CHECK(ConstantExpr::getAnd(P0, P0), "and i32 " P0STR ", " P0STR);
251 CHECK(ConstantExpr::getOr(P0, P0), "or i32 " P0STR ", " P0STR);
252 CHECK(ConstantExpr::getXor(P0, P0), "xor i32 " P0STR ", " P0STR);
253 CHECK(ConstantExpr::getShl(P0, P0), "shl i32 " P0STR ", " P0STR);
254 CHECK(ConstantExpr::getShl(P0, P0, true), "shl nuw i32 " P0STR ", " P0STR);
255 CHECK(ConstantExpr::getShl(P0, P0, false, true), "shl nsw i32 " P0STR ", "
256 P0STR);
257 CHECK(ConstantExpr::getLShr(P0, P0, false), "lshr i32 " P0STR ", " P0STR);
258 CHECK(ConstantExpr::getLShr(P0, P0, true), "lshr exact i32 " P0STR ", " P0STR);
259 CHECK(ConstantExpr::getAShr(P0, P0, false), "ashr i32 " P0STR ", " P0STR);
260 CHECK(ConstantExpr::getAShr(P0, P0, true), "ashr exact i32 " P0STR ", " P0STR);
261
262 CHECK(ConstantExpr::getSExt(P0, Int64Ty), "sext i32 " P0STR " to i64");
263 CHECK(ConstantExpr::getZExt(P0, Int64Ty), "zext i32 " P0STR " to i64");
264 CHECK(ConstantExpr::getFPTrunc(P2, FloatTy), "fptrunc double " P2STR
265 " to float");
266 CHECK(ConstantExpr::getFPExtend(P1, DoubleTy), "fpext float " P1STR
267 " to double");
268
269 CHECK(ConstantExpr::getExactUDiv(P0, P0), "udiv exact i32 " P0STR ", " P0STR);
270
271 CHECK(ConstantExpr::getSelect(P3, P0, P4), "select i1 " P3STR ", i32 " P0STR
272 ", i32 " P4STR);
273 CHECK(ConstantExpr::getICmp(CmpInst::ICMP_EQ, P0, P4), "icmp eq i32 " P0STR
274 ", " P4STR);
275 CHECK(ConstantExpr::getFCmp(CmpInst::FCMP_ULT, P1, P5), "fcmp ult float "
276 P1STR ", " P5STR);
277
278 std::vector<Constant*> V;
279 V.push_back(One);
280 // FIXME: getGetElementPtr() actually creates an inbounds ConstantGEP,
281 // not a normal one!
282 //CHECK(ConstantExpr::getGetElementPtr(Global, V, false),
283 // "getelementptr i32*, i32** @dummy, i32 1");
284 CHECK(ConstantExpr::getInBoundsGetElementPtr(PointerType::getUnqual(Int32Ty),
285 Global, V),
286 "getelementptr inbounds i32*, i32** @dummy, i32 1");
287
288 CHECK(ConstantExpr::getExtractElement(P6, One), "extractelement <2 x i16> "
289 P6STR ", i32 1");
290
291 EXPECT_EQ(Undef16, ConstantExpr::getExtractElement(P6, Two));
292 EXPECT_EQ(Undef16, ConstantExpr::getExtractElement(P6, Big));
293 EXPECT_EQ(Undef16, ConstantExpr::getExtractElement(P6, Undef64));
294
295 EXPECT_EQ(Elt, ConstantExpr::getExtractElement(
296 ConstantExpr::getInsertElement(P6, Elt, One), One));
297 EXPECT_EQ(UndefV16, ConstantExpr::getInsertElement(P6, Elt, Two));
298 EXPECT_EQ(UndefV16, ConstantExpr::getInsertElement(P6, Elt, Big));
299 EXPECT_EQ(UndefV16, ConstantExpr::getInsertElement(P6, Elt, Undef64));
300 }
301
302 #ifdef GTEST_HAS_DEATH_TEST
303 #ifndef NDEBUG
TEST(ConstantsTest,ReplaceWithConstantTest)304 TEST(ConstantsTest, ReplaceWithConstantTest) {
305 LLVMContext Context;
306 std::unique_ptr<Module> M(new Module("MyModule", Context));
307
308 Type *Int32Ty = Type::getInt32Ty(Context);
309 Constant *One = ConstantInt::get(Int32Ty, 1);
310
311 Constant *Global =
312 M->getOrInsertGlobal("dummy", PointerType::getUnqual(Int32Ty));
313 Constant *GEP = ConstantExpr::getGetElementPtr(
314 PointerType::getUnqual(Int32Ty), Global, One);
315 EXPECT_DEATH(Global->replaceAllUsesWith(GEP),
316 "this->replaceAllUsesWith\\(expr\\(this\\)\\) is NOT valid!");
317 }
318
319 #endif
320 #endif
321
322 #undef CHECK
323
TEST(ConstantsTest,ConstantArrayReplaceWithConstant)324 TEST(ConstantsTest, ConstantArrayReplaceWithConstant) {
325 LLVMContext Context;
326 std::unique_ptr<Module> M(new Module("MyModule", Context));
327
328 Type *IntTy = Type::getInt8Ty(Context);
329 ArrayType *ArrayTy = ArrayType::get(IntTy, 2);
330 Constant *A01Vals[2] = {ConstantInt::get(IntTy, 0),
331 ConstantInt::get(IntTy, 1)};
332 Constant *A01 = ConstantArray::get(ArrayTy, A01Vals);
333
334 Constant *Global = new GlobalVariable(*M, IntTy, false,
335 GlobalValue::ExternalLinkage, nullptr);
336 Constant *GlobalInt = ConstantExpr::getPtrToInt(Global, IntTy);
337 Constant *A0GVals[2] = {ConstantInt::get(IntTy, 0), GlobalInt};
338 Constant *A0G = ConstantArray::get(ArrayTy, A0GVals);
339 ASSERT_NE(A01, A0G);
340
341 GlobalVariable *RefArray =
342 new GlobalVariable(*M, ArrayTy, false, GlobalValue::ExternalLinkage, A0G);
343 ASSERT_EQ(A0G, RefArray->getInitializer());
344
345 GlobalInt->replaceAllUsesWith(ConstantInt::get(IntTy, 1));
346 ASSERT_EQ(A01, RefArray->getInitializer());
347 }
348
TEST(ConstantsTest,ConstantExprReplaceWithConstant)349 TEST(ConstantsTest, ConstantExprReplaceWithConstant) {
350 LLVMContext Context;
351 std::unique_ptr<Module> M(new Module("MyModule", Context));
352
353 Type *IntTy = Type::getInt8Ty(Context);
354 Constant *G1 = new GlobalVariable(*M, IntTy, false,
355 GlobalValue::ExternalLinkage, nullptr);
356 Constant *G2 = new GlobalVariable(*M, IntTy, false,
357 GlobalValue::ExternalLinkage, nullptr);
358 ASSERT_NE(G1, G2);
359
360 Constant *Int1 = ConstantExpr::getPtrToInt(G1, IntTy);
361 Constant *Int2 = ConstantExpr::getPtrToInt(G2, IntTy);
362 ASSERT_NE(Int1, Int2);
363
364 GlobalVariable *Ref =
365 new GlobalVariable(*M, IntTy, false, GlobalValue::ExternalLinkage, Int1);
366 ASSERT_EQ(Int1, Ref->getInitializer());
367
368 G1->replaceAllUsesWith(G2);
369 ASSERT_EQ(Int2, Ref->getInitializer());
370 }
371
TEST(ConstantsTest,GEPReplaceWithConstant)372 TEST(ConstantsTest, GEPReplaceWithConstant) {
373 LLVMContext Context;
374 std::unique_ptr<Module> M(new Module("MyModule", Context));
375
376 Type *IntTy = Type::getInt32Ty(Context);
377 Type *PtrTy = PointerType::get(IntTy, 0);
378 auto *C1 = ConstantInt::get(IntTy, 1);
379 auto *Placeholder = new GlobalVariable(
380 *M, IntTy, false, GlobalValue::ExternalWeakLinkage, nullptr);
381 auto *GEP = ConstantExpr::getGetElementPtr(IntTy, Placeholder, C1);
382 ASSERT_EQ(GEP->getOperand(0), Placeholder);
383
384 auto *Ref =
385 new GlobalVariable(*M, PtrTy, false, GlobalValue::ExternalLinkage, GEP);
386 ASSERT_EQ(GEP, Ref->getInitializer());
387
388 auto *Global = new GlobalVariable(*M, PtrTy, false,
389 GlobalValue::ExternalLinkage, nullptr);
390 auto *Alias = GlobalAlias::create(IntTy, 0, GlobalValue::ExternalLinkage,
391 "alias", Global, M.get());
392 Placeholder->replaceAllUsesWith(Alias);
393 ASSERT_EQ(GEP, Ref->getInitializer());
394 ASSERT_EQ(GEP->getOperand(0), Alias);
395 }
396
TEST(ConstantsTest,AliasCAPI)397 TEST(ConstantsTest, AliasCAPI) {
398 LLVMContext Context;
399 SMDiagnostic Error;
400 std::unique_ptr<Module> M =
401 parseAssemblyString("@g = global i32 42", Error, Context);
402 GlobalVariable *G = M->getGlobalVariable("g");
403 Type *I16Ty = Type::getInt16Ty(Context);
404 Type *I16PTy = PointerType::get(I16Ty, 0);
405 Constant *Aliasee = ConstantExpr::getBitCast(G, I16PTy);
406 LLVMValueRef AliasRef =
407 LLVMAddAlias(wrap(M.get()), wrap(I16PTy), wrap(Aliasee), "a");
408 ASSERT_EQ(unwrap<GlobalAlias>(AliasRef)->getAliasee(), Aliasee);
409 }
410
getNameOfType(Type * T)411 static std::string getNameOfType(Type *T) {
412 std::string S;
413 raw_string_ostream RSOS(S);
414 T->print(RSOS);
415 return S;
416 }
417
TEST(ConstantsTest,BuildConstantDataArrays)418 TEST(ConstantsTest, BuildConstantDataArrays) {
419 LLVMContext Context;
420 std::unique_ptr<Module> M(new Module("MyModule", Context));
421
422 for (Type *T : {Type::getInt8Ty(Context), Type::getInt16Ty(Context),
423 Type::getInt32Ty(Context), Type::getInt64Ty(Context)}) {
424 ArrayType *ArrayTy = ArrayType::get(T, 2);
425 Constant *Vals[] = {ConstantInt::get(T, 0), ConstantInt::get(T, 1)};
426 Constant *CDV = ConstantArray::get(ArrayTy, Vals);
427 ASSERT_TRUE(dyn_cast<ConstantDataArray>(CDV) != nullptr)
428 << " T = " << getNameOfType(T);
429 }
430
431 for (Type *T : {Type::getHalfTy(Context), Type::getFloatTy(Context),
432 Type::getDoubleTy(Context)}) {
433 ArrayType *ArrayTy = ArrayType::get(T, 2);
434 Constant *Vals[] = {ConstantFP::get(T, 0), ConstantFP::get(T, 1)};
435 Constant *CDV = ConstantArray::get(ArrayTy, Vals);
436 ASSERT_TRUE(dyn_cast<ConstantDataArray>(CDV) != nullptr)
437 << " T = " << getNameOfType(T);
438 }
439 }
440
TEST(ConstantsTest,BuildConstantDataVectors)441 TEST(ConstantsTest, BuildConstantDataVectors) {
442 LLVMContext Context;
443 std::unique_ptr<Module> M(new Module("MyModule", Context));
444
445 for (Type *T : {Type::getInt8Ty(Context), Type::getInt16Ty(Context),
446 Type::getInt32Ty(Context), Type::getInt64Ty(Context)}) {
447 Constant *Vals[] = {ConstantInt::get(T, 0), ConstantInt::get(T, 1)};
448 Constant *CDV = ConstantVector::get(Vals);
449 ASSERT_TRUE(dyn_cast<ConstantDataVector>(CDV) != nullptr)
450 << " T = " << getNameOfType(T);
451 }
452
453 for (Type *T : {Type::getHalfTy(Context), Type::getFloatTy(Context),
454 Type::getDoubleTy(Context)}) {
455 Constant *Vals[] = {ConstantFP::get(T, 0), ConstantFP::get(T, 1)};
456 Constant *CDV = ConstantVector::get(Vals);
457 ASSERT_TRUE(dyn_cast<ConstantDataVector>(CDV) != nullptr)
458 << " T = " << getNameOfType(T);
459 }
460 }
461
TEST(ConstantsTest,BitcastToGEP)462 TEST(ConstantsTest, BitcastToGEP) {
463 LLVMContext Context;
464 std::unique_ptr<Module> M(new Module("MyModule", Context));
465
466 auto *i32 = Type::getInt32Ty(Context);
467 auto *U = StructType::create(Context, "Unsized");
468 Type *EltTys[] = {i32, U};
469 auto *S = StructType::create(EltTys);
470
471 auto *G = new GlobalVariable(*M, S, false,
472 GlobalValue::ExternalLinkage, nullptr);
473 auto *PtrTy = PointerType::get(i32, 0);
474 auto *C = ConstantExpr::getBitCast(G, PtrTy);
475 ASSERT_EQ(cast<ConstantExpr>(C)->getOpcode(), Instruction::BitCast);
476 }
477
foldFuncPtrAndConstToNull(LLVMContext & Context,Module * TheModule,uint64_t AndValue,MaybeAlign FunctionAlign=llvm::None)478 bool foldFuncPtrAndConstToNull(LLVMContext &Context, Module *TheModule,
479 uint64_t AndValue,
480 MaybeAlign FunctionAlign = llvm::None) {
481 Type *VoidType(Type::getVoidTy(Context));
482 FunctionType *FuncType(FunctionType::get(VoidType, false));
483 Function *Func(Function::Create(
484 FuncType, GlobalValue::ExternalLinkage, "", TheModule));
485
486 if (FunctionAlign)
487 Func->setAlignment(*FunctionAlign);
488
489 IntegerType *ConstantIntType(Type::getInt32Ty(Context));
490 ConstantInt *TheConstant(ConstantInt::get(ConstantIntType, AndValue));
491
492 Constant *TheConstantExpr(
493 ConstantExpr::getPtrToInt(Func, ConstantIntType));
494
495
496 bool result = ConstantExpr::get(Instruction::And, TheConstantExpr,
497 TheConstant)->isNullValue();
498
499 if (!TheModule) {
500 // If the Module exists then it will delete the Function.
501 delete Func;
502 }
503
504 return result;
505 }
506
TEST(ConstantsTest,FoldFunctionPtrAlignUnknownAnd2)507 TEST(ConstantsTest, FoldFunctionPtrAlignUnknownAnd2) {
508 LLVMContext Context;
509 Module TheModule("TestModule", Context);
510 // When the DataLayout doesn't specify a function pointer alignment we
511 // assume in this case that it is 4 byte aligned. This is a bug but we can't
512 // fix it directly because it causes a code size regression on X86.
513 // FIXME: This test should be changed once existing targets have
514 // appropriate defaults. See associated FIXME in ConstantFoldBinaryInstruction
515 ASSERT_TRUE(foldFuncPtrAndConstToNull(Context, &TheModule, 2));
516 }
517
TEST(ConstantsTest,DontFoldFunctionPtrAlignUnknownAnd4)518 TEST(ConstantsTest, DontFoldFunctionPtrAlignUnknownAnd4) {
519 LLVMContext Context;
520 Module TheModule("TestModule", Context);
521 ASSERT_FALSE(foldFuncPtrAndConstToNull(Context, &TheModule, 4));
522 }
523
TEST(ConstantsTest,FoldFunctionPtrAlign4)524 TEST(ConstantsTest, FoldFunctionPtrAlign4) {
525 LLVMContext Context;
526 Module TheModule("TestModule", Context);
527 const char* AlignmentStrings[] = { "Fi32", "Fn32" };
528
529 for (unsigned AndValue = 1; AndValue <= 2; ++AndValue) {
530 for (const char *AlignmentString : AlignmentStrings) {
531 TheModule.setDataLayout(AlignmentString);
532 ASSERT_TRUE(foldFuncPtrAndConstToNull(Context, &TheModule, AndValue));
533 }
534 }
535 }
536
TEST(ConstantsTest,DontFoldFunctionPtrAlign1)537 TEST(ConstantsTest, DontFoldFunctionPtrAlign1) {
538 LLVMContext Context;
539 Module TheModule("TestModule", Context);
540 const char* AlignmentStrings[] = { "Fi8", "Fn8" };
541
542 for (const char* AlignmentString : AlignmentStrings) {
543 TheModule.setDataLayout(AlignmentString);
544 ASSERT_FALSE(foldFuncPtrAndConstToNull(Context, &TheModule, 2));
545 }
546 }
547
TEST(ConstantsTest,FoldFunctionAlign4PtrAlignMultiple)548 TEST(ConstantsTest, FoldFunctionAlign4PtrAlignMultiple) {
549 LLVMContext Context;
550 Module TheModule("TestModule", Context);
551 TheModule.setDataLayout("Fn8");
552 ASSERT_TRUE(foldFuncPtrAndConstToNull(Context, &TheModule, 2, Align(4)));
553 }
554
TEST(ConstantsTest,DontFoldFunctionAlign4PtrAlignIndependent)555 TEST(ConstantsTest, DontFoldFunctionAlign4PtrAlignIndependent) {
556 LLVMContext Context;
557 Module TheModule("TestModule", Context);
558 TheModule.setDataLayout("Fi8");
559 ASSERT_FALSE(foldFuncPtrAndConstToNull(Context, &TheModule, 2, Align(4)));
560 }
561
TEST(ConstantsTest,DontFoldFunctionPtrIfNoModule)562 TEST(ConstantsTest, DontFoldFunctionPtrIfNoModule) {
563 LLVMContext Context;
564 // Even though the function is explicitly 4 byte aligned, in the absence of a
565 // DataLayout we can't assume that the function pointer is aligned.
566 ASSERT_FALSE(foldFuncPtrAndConstToNull(Context, nullptr, 2, Align(4)));
567 }
568
TEST(ConstantsTest,FoldGlobalVariablePtr)569 TEST(ConstantsTest, FoldGlobalVariablePtr) {
570 LLVMContext Context;
571
572 IntegerType *IntType(Type::getInt32Ty(Context));
573
574 std::unique_ptr<GlobalVariable> Global(
575 new GlobalVariable(IntType, true, GlobalValue::ExternalLinkage));
576
577 Global->setAlignment(Align(4));
578
579 ConstantInt *TheConstant(ConstantInt::get(IntType, 2));
580
581 Constant *TheConstantExpr(
582 ConstantExpr::getPtrToInt(Global.get(), IntType));
583
584 ASSERT_TRUE(ConstantExpr::get( \
585 Instruction::And, TheConstantExpr, TheConstant)->isNullValue());
586 }
587
588 // Check that undefined elements in vector constants are matched
589 // correctly for both integer and floating-point types. Just don't
590 // crash on vectors of pointers (could be handled?).
591
TEST(ConstantsTest,isElementWiseEqual)592 TEST(ConstantsTest, isElementWiseEqual) {
593 LLVMContext Context;
594
595 Type *Int32Ty = Type::getInt32Ty(Context);
596 Constant *CU = UndefValue::get(Int32Ty);
597 Constant *C1 = ConstantInt::get(Int32Ty, 1);
598 Constant *C2 = ConstantInt::get(Int32Ty, 2);
599
600 Constant *C1211 = ConstantVector::get({C1, C2, C1, C1});
601 Constant *C12U1 = ConstantVector::get({C1, C2, CU, C1});
602 Constant *C12U2 = ConstantVector::get({C1, C2, CU, C2});
603 Constant *C12U21 = ConstantVector::get({C1, C2, CU, C2, C1});
604
605 EXPECT_TRUE(C1211->isElementWiseEqual(C12U1));
606 EXPECT_TRUE(C12U1->isElementWiseEqual(C1211));
607 EXPECT_FALSE(C12U2->isElementWiseEqual(C12U1));
608 EXPECT_FALSE(C12U1->isElementWiseEqual(C12U2));
609 EXPECT_FALSE(C12U21->isElementWiseEqual(C12U2));
610
611 Type *FltTy = Type::getFloatTy(Context);
612 Constant *CFU = UndefValue::get(FltTy);
613 Constant *CF1 = ConstantFP::get(FltTy, 1.0);
614 Constant *CF2 = ConstantFP::get(FltTy, 2.0);
615
616 Constant *CF1211 = ConstantVector::get({CF1, CF2, CF1, CF1});
617 Constant *CF12U1 = ConstantVector::get({CF1, CF2, CFU, CF1});
618 Constant *CF12U2 = ConstantVector::get({CF1, CF2, CFU, CF2});
619 Constant *CFUU1U = ConstantVector::get({CFU, CFU, CF1, CFU});
620
621 EXPECT_TRUE(CF1211->isElementWiseEqual(CF12U1));
622 EXPECT_TRUE(CF12U1->isElementWiseEqual(CF1211));
623 EXPECT_TRUE(CFUU1U->isElementWiseEqual(CF12U1));
624 EXPECT_FALSE(CF12U2->isElementWiseEqual(CF12U1));
625 EXPECT_FALSE(CF12U1->isElementWiseEqual(CF12U2));
626
627 PointerType *PtrTy = Type::getInt8PtrTy(Context);
628 Constant *CPU = UndefValue::get(PtrTy);
629 Constant *CP0 = ConstantPointerNull::get(PtrTy);
630
631 Constant *CP0000 = ConstantVector::get({CP0, CP0, CP0, CP0});
632 Constant *CP00U0 = ConstantVector::get({CP0, CP0, CPU, CP0});
633 Constant *CP00U = ConstantVector::get({CP0, CP0, CPU});
634
635 EXPECT_FALSE(CP0000->isElementWiseEqual(CP00U0));
636 EXPECT_FALSE(CP00U0->isElementWiseEqual(CP0000));
637 EXPECT_FALSE(CP0000->isElementWiseEqual(CP00U));
638 EXPECT_FALSE(CP00U->isElementWiseEqual(CP00U0));
639 }
640
TEST(ConstantsTest,GetSplatValueRoundTrip)641 TEST(ConstantsTest, GetSplatValueRoundTrip) {
642 LLVMContext Context;
643
644 Type *FloatTy = Type::getFloatTy(Context);
645 Type *Int32Ty = Type::getInt32Ty(Context);
646 Type *Int8Ty = Type::getInt8Ty(Context);
647
648 for (unsigned Min : {1, 2, 8}) {
649 ElementCount ScalableEC = {Min, true};
650 ElementCount FixedEC = {Min, false};
651
652 for (auto EC : {ScalableEC, FixedEC}) {
653 for (auto *Ty : {FloatTy, Int32Ty, Int8Ty}) {
654 Constant *Zero = Constant::getNullValue(Ty);
655 Constant *One = Constant::getAllOnesValue(Ty);
656
657 for (auto *C : {Zero, One}) {
658 Constant *Splat = ConstantVector::getSplat(EC, C);
659 ASSERT_NE(nullptr, Splat);
660
661 Constant *SplatVal = Splat->getSplatValue();
662 EXPECT_NE(nullptr, SplatVal);
663 EXPECT_EQ(SplatVal, C);
664 }
665 }
666 }
667 }
668 }
669
670 } // end anonymous namespace
671 } // end namespace llvm
672