1 //===- llvm/unittest/IR/ConstantsTest.cpp - Constants unit tests ----------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "llvm/AsmParser/Parser.h"
11 #include "llvm/IR/Constants.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 "llvm-c/Core.h"
19 #include "gtest/gtest.h"
20
21 namespace llvm {
22 namespace {
23
TEST(ConstantsTest,Integer_i1)24 TEST(ConstantsTest, Integer_i1) {
25 LLVMContext Context;
26 IntegerType *Int1 = IntegerType::get(Context, 1);
27 Constant* One = ConstantInt::get(Int1, 1, true);
28 Constant* Zero = ConstantInt::get(Int1, 0);
29 Constant* NegOne = ConstantInt::get(Int1, static_cast<uint64_t>(-1), true);
30 EXPECT_EQ(NegOne, ConstantInt::getSigned(Int1, -1));
31 Constant* Undef = UndefValue::get(Int1);
32
33 // Input: @b = constant i1 add(i1 1 , i1 1)
34 // Output: @b = constant i1 false
35 EXPECT_EQ(Zero, ConstantExpr::getAdd(One, One));
36
37 // @c = constant i1 add(i1 -1, i1 1)
38 // @c = constant i1 false
39 EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, One));
40
41 // @d = constant i1 add(i1 -1, i1 -1)
42 // @d = constant i1 false
43 EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, NegOne));
44
45 // @e = constant i1 sub(i1 -1, i1 1)
46 // @e = constant i1 false
47 EXPECT_EQ(Zero, ConstantExpr::getSub(NegOne, One));
48
49 // @f = constant i1 sub(i1 1 , i1 -1)
50 // @f = constant i1 false
51 EXPECT_EQ(Zero, ConstantExpr::getSub(One, NegOne));
52
53 // @g = constant i1 sub(i1 1 , i1 1)
54 // @g = constant i1 false
55 EXPECT_EQ(Zero, ConstantExpr::getSub(One, One));
56
57 // @h = constant i1 shl(i1 1 , i1 1) ; undefined
58 // @h = constant i1 undef
59 EXPECT_EQ(Undef, ConstantExpr::getShl(One, One));
60
61 // @i = constant i1 shl(i1 1 , i1 0)
62 // @i = constant i1 true
63 EXPECT_EQ(One, ConstantExpr::getShl(One, Zero));
64
65 // @j = constant i1 lshr(i1 1, i1 1) ; undefined
66 // @j = constant i1 undef
67 EXPECT_EQ(Undef, ConstantExpr::getLShr(One, One));
68
69 // @m = constant i1 ashr(i1 1, i1 1) ; undefined
70 // @m = constant i1 undef
71 EXPECT_EQ(Undef, ConstantExpr::getAShr(One, One));
72
73 // @n = constant i1 mul(i1 -1, i1 1)
74 // @n = constant i1 true
75 EXPECT_EQ(One, ConstantExpr::getMul(NegOne, One));
76
77 // @o = constant i1 sdiv(i1 -1, i1 1) ; overflow
78 // @o = constant i1 true
79 EXPECT_EQ(One, ConstantExpr::getSDiv(NegOne, One));
80
81 // @p = constant i1 sdiv(i1 1 , i1 -1); overflow
82 // @p = constant i1 true
83 EXPECT_EQ(One, ConstantExpr::getSDiv(One, NegOne));
84
85 // @q = constant i1 udiv(i1 -1, i1 1)
86 // @q = constant i1 true
87 EXPECT_EQ(One, ConstantExpr::getUDiv(NegOne, One));
88
89 // @r = constant i1 udiv(i1 1, i1 -1)
90 // @r = constant i1 true
91 EXPECT_EQ(One, ConstantExpr::getUDiv(One, NegOne));
92
93 // @s = constant i1 srem(i1 -1, i1 1) ; overflow
94 // @s = constant i1 false
95 EXPECT_EQ(Zero, ConstantExpr::getSRem(NegOne, One));
96
97 // @t = constant i1 urem(i1 -1, i1 1)
98 // @t = constant i1 false
99 EXPECT_EQ(Zero, ConstantExpr::getURem(NegOne, One));
100
101 // @u = constant i1 srem(i1 1, i1 -1) ; overflow
102 // @u = constant i1 false
103 EXPECT_EQ(Zero, ConstantExpr::getSRem(One, NegOne));
104 }
105
TEST(ConstantsTest,IntSigns)106 TEST(ConstantsTest, IntSigns) {
107 LLVMContext Context;
108 IntegerType *Int8Ty = Type::getInt8Ty(Context);
109 EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, false)->getSExtValue());
110 EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, true)->getSExtValue());
111 EXPECT_EQ(100, ConstantInt::getSigned(Int8Ty, 100)->getSExtValue());
112 EXPECT_EQ(-50, ConstantInt::get(Int8Ty, 206)->getSExtValue());
113 EXPECT_EQ(-50, ConstantInt::getSigned(Int8Ty, -50)->getSExtValue());
114 EXPECT_EQ(206U, ConstantInt::getSigned(Int8Ty, -50)->getZExtValue());
115
116 // Overflow is handled by truncation.
117 EXPECT_EQ(0x3b, ConstantInt::get(Int8Ty, 0x13b)->getSExtValue());
118 }
119
TEST(ConstantsTest,FP128Test)120 TEST(ConstantsTest, FP128Test) {
121 LLVMContext Context;
122 Type *FP128Ty = Type::getFP128Ty(Context);
123
124 IntegerType *Int128Ty = Type::getIntNTy(Context, 128);
125 Constant *Zero128 = Constant::getNullValue(Int128Ty);
126 Constant *X = ConstantExpr::getUIToFP(Zero128, FP128Ty);
127 EXPECT_TRUE(isa<ConstantFP>(X));
128 }
129
TEST(ConstantsTest,PointerCast)130 TEST(ConstantsTest, PointerCast) {
131 LLVMContext C;
132 Type *Int8PtrTy = Type::getInt8PtrTy(C);
133 Type *Int32PtrTy = Type::getInt32PtrTy(C);
134 Type *Int64Ty = Type::getInt64Ty(C);
135 VectorType *Int8PtrVecTy = VectorType::get(Int8PtrTy, 4);
136 VectorType *Int32PtrVecTy = VectorType::get(Int32PtrTy, 4);
137 VectorType *Int64VecTy = VectorType::get(Int64Ty, 4);
138
139 // ptrtoint i8* to i64
140 EXPECT_EQ(Constant::getNullValue(Int64Ty),
141 ConstantExpr::getPointerCast(
142 Constant::getNullValue(Int8PtrTy), Int64Ty));
143
144 // bitcast i8* to i32*
145 EXPECT_EQ(Constant::getNullValue(Int32PtrTy),
146 ConstantExpr::getPointerCast(
147 Constant::getNullValue(Int8PtrTy), Int32PtrTy));
148
149 // ptrtoint <4 x i8*> to <4 x i64>
150 EXPECT_EQ(Constant::getNullValue(Int64VecTy),
151 ConstantExpr::getPointerCast(
152 Constant::getNullValue(Int8PtrVecTy), Int64VecTy));
153
154 // bitcast <4 x i8*> to <4 x i32*>
155 EXPECT_EQ(Constant::getNullValue(Int32PtrVecTy),
156 ConstantExpr::getPointerCast(
157 Constant::getNullValue(Int8PtrVecTy), Int32PtrVecTy));
158
159 Type *Int32Ptr1Ty = Type::getInt32PtrTy(C, 1);
160 ConstantInt *K = ConstantInt::get(Type::getInt64Ty(C), 1234);
161
162 // Make sure that addrspacecast of inttoptr is not folded away.
163 EXPECT_NE(K,
164 ConstantExpr::getAddrSpaceCast(
165 ConstantExpr::getIntToPtr(K, Int32PtrTy), Int32Ptr1Ty));
166 EXPECT_NE(K,
167 ConstantExpr::getAddrSpaceCast(
168 ConstantExpr::getIntToPtr(K, Int32Ptr1Ty), Int32PtrTy));
169
170 Constant *NullInt32Ptr0 = Constant::getNullValue(Int32PtrTy);
171 Constant *NullInt32Ptr1 = Constant::getNullValue(Int32Ptr1Ty);
172
173 // Make sure that addrspacecast of null is not folded away.
174 EXPECT_NE(Constant::getNullValue(Int32PtrTy),
175 ConstantExpr::getAddrSpaceCast(NullInt32Ptr0, Int32Ptr1Ty));
176
177 EXPECT_NE(Constant::getNullValue(Int32Ptr1Ty),
178 ConstantExpr::getAddrSpaceCast(NullInt32Ptr1, Int32PtrTy));
179 }
180
181 #define CHECK(x, y) { \
182 std::string __s; \
183 raw_string_ostream __o(__s); \
184 Instruction *__I = cast<ConstantExpr>(x)->getAsInstruction(); \
185 __I->print(__o); \
186 delete __I; \
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, VectorType::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), "fsub float -0.000000e+00, " 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(dyn_cast<ConstantExpr>(C)->getOpcode(),
476 Instruction::BitCast);
477 }
478
479 } // end anonymous namespace
480 } // end namespace llvm
481