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 IntegerType* Int1 = IntegerType::get(getGlobalContext(), 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 IntegerType* Int8Ty = Type::getInt8Ty(getGlobalContext());
107 EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, false)->getSExtValue());
108 EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, true)->getSExtValue());
109 EXPECT_EQ(100, ConstantInt::getSigned(Int8Ty, 100)->getSExtValue());
110 EXPECT_EQ(-50, ConstantInt::get(Int8Ty, 206)->getSExtValue());
111 EXPECT_EQ(-50, ConstantInt::getSigned(Int8Ty, -50)->getSExtValue());
112 EXPECT_EQ(206U, ConstantInt::getSigned(Int8Ty, -50)->getZExtValue());
113
114 // Overflow is handled by truncation.
115 EXPECT_EQ(0x3b, ConstantInt::get(Int8Ty, 0x13b)->getSExtValue());
116 }
117
TEST(ConstantsTest,FP128Test)118 TEST(ConstantsTest, FP128Test) {
119 Type *FP128Ty = Type::getFP128Ty(getGlobalContext());
120
121 IntegerType *Int128Ty = Type::getIntNTy(getGlobalContext(), 128);
122 Constant *Zero128 = Constant::getNullValue(Int128Ty);
123 Constant *X = ConstantExpr::getUIToFP(Zero128, FP128Ty);
124 EXPECT_TRUE(isa<ConstantFP>(X));
125 }
126
TEST(ConstantsTest,PointerCast)127 TEST(ConstantsTest, PointerCast) {
128 LLVMContext &C(getGlobalContext());
129 Type *Int8PtrTy = Type::getInt8PtrTy(C);
130 Type *Int32PtrTy = Type::getInt32PtrTy(C);
131 Type *Int64Ty = Type::getInt64Ty(C);
132 VectorType *Int8PtrVecTy = VectorType::get(Int8PtrTy, 4);
133 VectorType *Int32PtrVecTy = VectorType::get(Int32PtrTy, 4);
134 VectorType *Int64VecTy = VectorType::get(Int64Ty, 4);
135
136 // ptrtoint i8* to i64
137 EXPECT_EQ(Constant::getNullValue(Int64Ty),
138 ConstantExpr::getPointerCast(
139 Constant::getNullValue(Int8PtrTy), Int64Ty));
140
141 // bitcast i8* to i32*
142 EXPECT_EQ(Constant::getNullValue(Int32PtrTy),
143 ConstantExpr::getPointerCast(
144 Constant::getNullValue(Int8PtrTy), Int32PtrTy));
145
146 // ptrtoint <4 x i8*> to <4 x i64>
147 EXPECT_EQ(Constant::getNullValue(Int64VecTy),
148 ConstantExpr::getPointerCast(
149 Constant::getNullValue(Int8PtrVecTy), Int64VecTy));
150
151 // bitcast <4 x i8*> to <4 x i32*>
152 EXPECT_EQ(Constant::getNullValue(Int32PtrVecTy),
153 ConstantExpr::getPointerCast(
154 Constant::getNullValue(Int8PtrVecTy), Int32PtrVecTy));
155 }
156
157 #define CHECK(x, y) { \
158 std::string __s; \
159 raw_string_ostream __o(__s); \
160 Instruction *__I = cast<ConstantExpr>(x)->getAsInstruction(); \
161 __I->print(__o); \
162 delete __I; \
163 __o.flush(); \
164 EXPECT_EQ(std::string(" <badref> = " y), __s); \
165 }
166
TEST(ConstantsTest,AsInstructionsTest)167 TEST(ConstantsTest, AsInstructionsTest) {
168 std::unique_ptr<Module> M(new Module("MyModule", getGlobalContext()));
169
170 Type *Int64Ty = Type::getInt64Ty(getGlobalContext());
171 Type *Int32Ty = Type::getInt32Ty(getGlobalContext());
172 Type *Int16Ty = Type::getInt16Ty(getGlobalContext());
173 Type *Int1Ty = Type::getInt1Ty(getGlobalContext());
174 Type *FloatTy = Type::getFloatTy(getGlobalContext());
175 Type *DoubleTy = Type::getDoubleTy(getGlobalContext());
176
177 Constant *Global = M->getOrInsertGlobal("dummy",
178 PointerType::getUnqual(Int32Ty));
179 Constant *Global2 = M->getOrInsertGlobal("dummy2",
180 PointerType::getUnqual(Int32Ty));
181
182 Constant *P0 = ConstantExpr::getPtrToInt(Global, Int32Ty);
183 Constant *P1 = ConstantExpr::getUIToFP(P0, FloatTy);
184 Constant *P2 = ConstantExpr::getUIToFP(P0, DoubleTy);
185 Constant *P3 = ConstantExpr::getTrunc(P0, Int1Ty);
186 Constant *P4 = ConstantExpr::getPtrToInt(Global2, Int32Ty);
187 Constant *P5 = ConstantExpr::getUIToFP(P4, FloatTy);
188 Constant *P6 = ConstantExpr::getBitCast(P4, VectorType::get(Int16Ty, 2));
189
190 Constant *One = ConstantInt::get(Int32Ty, 1);
191 Constant *Two = ConstantInt::get(Int64Ty, 2);
192 Constant *Big = ConstantInt::get(getGlobalContext(),
193 APInt{256, uint64_t(-1), true});
194 Constant *Elt = ConstantInt::get(Int16Ty, 2015);
195 Constant *Undef16 = UndefValue::get(Int16Ty);
196 Constant *Undef64 = UndefValue::get(Int64Ty);
197 Constant *UndefV16 = UndefValue::get(P6->getType());
198
199 #define P0STR "ptrtoint (i32** @dummy to i32)"
200 #define P1STR "uitofp (i32 ptrtoint (i32** @dummy to i32) to float)"
201 #define P2STR "uitofp (i32 ptrtoint (i32** @dummy to i32) to double)"
202 #define P3STR "ptrtoint (i32** @dummy to i1)"
203 #define P4STR "ptrtoint (i32** @dummy2 to i32)"
204 #define P5STR "uitofp (i32 ptrtoint (i32** @dummy2 to i32) to float)"
205 #define P6STR "bitcast (i32 ptrtoint (i32** @dummy2 to i32) to <2 x i16>)"
206
207 CHECK(ConstantExpr::getNeg(P0), "sub i32 0, " P0STR);
208 CHECK(ConstantExpr::getFNeg(P1), "fsub float -0.000000e+00, " P1STR);
209 CHECK(ConstantExpr::getNot(P0), "xor i32 " P0STR ", -1");
210 CHECK(ConstantExpr::getAdd(P0, P0), "add i32 " P0STR ", " P0STR);
211 CHECK(ConstantExpr::getAdd(P0, P0, false, true), "add nsw i32 " P0STR ", "
212 P0STR);
213 CHECK(ConstantExpr::getAdd(P0, P0, true, true), "add nuw nsw i32 " P0STR ", "
214 P0STR);
215 CHECK(ConstantExpr::getFAdd(P1, P1), "fadd float " P1STR ", " P1STR);
216 CHECK(ConstantExpr::getSub(P0, P0), "sub i32 " P0STR ", " P0STR);
217 CHECK(ConstantExpr::getFSub(P1, P1), "fsub float " P1STR ", " P1STR);
218 CHECK(ConstantExpr::getMul(P0, P0), "mul i32 " P0STR ", " P0STR);
219 CHECK(ConstantExpr::getFMul(P1, P1), "fmul float " P1STR ", " P1STR);
220 CHECK(ConstantExpr::getUDiv(P0, P0), "udiv i32 " P0STR ", " P0STR);
221 CHECK(ConstantExpr::getSDiv(P0, P0), "sdiv i32 " P0STR ", " P0STR);
222 CHECK(ConstantExpr::getFDiv(P1, P1), "fdiv float " P1STR ", " P1STR);
223 CHECK(ConstantExpr::getURem(P0, P0), "urem i32 " P0STR ", " P0STR);
224 CHECK(ConstantExpr::getSRem(P0, P0), "srem i32 " P0STR ", " P0STR);
225 CHECK(ConstantExpr::getFRem(P1, P1), "frem float " P1STR ", " P1STR);
226 CHECK(ConstantExpr::getAnd(P0, P0), "and i32 " P0STR ", " P0STR);
227 CHECK(ConstantExpr::getOr(P0, P0), "or i32 " P0STR ", " P0STR);
228 CHECK(ConstantExpr::getXor(P0, P0), "xor i32 " P0STR ", " P0STR);
229 CHECK(ConstantExpr::getShl(P0, P0), "shl i32 " P0STR ", " P0STR);
230 CHECK(ConstantExpr::getShl(P0, P0, true), "shl nuw i32 " P0STR ", " P0STR);
231 CHECK(ConstantExpr::getShl(P0, P0, false, true), "shl nsw i32 " P0STR ", "
232 P0STR);
233 CHECK(ConstantExpr::getLShr(P0, P0, false), "lshr i32 " P0STR ", " P0STR);
234 CHECK(ConstantExpr::getLShr(P0, P0, true), "lshr exact i32 " P0STR ", " P0STR);
235 CHECK(ConstantExpr::getAShr(P0, P0, false), "ashr i32 " P0STR ", " P0STR);
236 CHECK(ConstantExpr::getAShr(P0, P0, true), "ashr exact i32 " P0STR ", " P0STR);
237
238 CHECK(ConstantExpr::getSExt(P0, Int64Ty), "sext i32 " P0STR " to i64");
239 CHECK(ConstantExpr::getZExt(P0, Int64Ty), "zext i32 " P0STR " to i64");
240 CHECK(ConstantExpr::getFPTrunc(P2, FloatTy), "fptrunc double " P2STR
241 " to float");
242 CHECK(ConstantExpr::getFPExtend(P1, DoubleTy), "fpext float " P1STR
243 " to double");
244
245 CHECK(ConstantExpr::getExactUDiv(P0, P0), "udiv exact i32 " P0STR ", " P0STR);
246
247 CHECK(ConstantExpr::getSelect(P3, P0, P4), "select i1 " P3STR ", i32 " P0STR
248 ", i32 " P4STR);
249 CHECK(ConstantExpr::getICmp(CmpInst::ICMP_EQ, P0, P4), "icmp eq i32 " P0STR
250 ", " P4STR);
251 CHECK(ConstantExpr::getFCmp(CmpInst::FCMP_ULT, P1, P5), "fcmp ult float "
252 P1STR ", " P5STR);
253
254 std::vector<Constant*> V;
255 V.push_back(One);
256 // FIXME: getGetElementPtr() actually creates an inbounds ConstantGEP,
257 // not a normal one!
258 //CHECK(ConstantExpr::getGetElementPtr(Global, V, false),
259 // "getelementptr i32*, i32** @dummy, i32 1");
260 CHECK(ConstantExpr::getInBoundsGetElementPtr(PointerType::getUnqual(Int32Ty),
261 Global, V),
262 "getelementptr inbounds i32*, i32** @dummy, i32 1");
263
264 CHECK(ConstantExpr::getExtractElement(P6, One), "extractelement <2 x i16> "
265 P6STR ", i32 1");
266
267 EXPECT_EQ(Undef16, ConstantExpr::getExtractElement(P6, Two));
268 EXPECT_EQ(Undef16, ConstantExpr::getExtractElement(P6, Big));
269 EXPECT_EQ(Undef16, ConstantExpr::getExtractElement(P6, Undef64));
270
271 EXPECT_EQ(Elt, ConstantExpr::getExtractElement(
272 ConstantExpr::getInsertElement(P6, Elt, One), One));
273 EXPECT_EQ(UndefV16, ConstantExpr::getInsertElement(P6, Elt, Two));
274 EXPECT_EQ(UndefV16, ConstantExpr::getInsertElement(P6, Elt, Big));
275 EXPECT_EQ(UndefV16, ConstantExpr::getInsertElement(P6, Elt, Undef64));
276 }
277
278 #ifdef GTEST_HAS_DEATH_TEST
279 #ifndef NDEBUG
TEST(ConstantsTest,ReplaceWithConstantTest)280 TEST(ConstantsTest, ReplaceWithConstantTest) {
281 std::unique_ptr<Module> M(new Module("MyModule", getGlobalContext()));
282
283 Type *Int32Ty = Type::getInt32Ty(getGlobalContext());
284 Constant *One = ConstantInt::get(Int32Ty, 1);
285
286 Constant *Global =
287 M->getOrInsertGlobal("dummy", PointerType::getUnqual(Int32Ty));
288 Constant *GEP = ConstantExpr::getGetElementPtr(
289 PointerType::getUnqual(Int32Ty), Global, One);
290 EXPECT_DEATH(Global->replaceAllUsesWith(GEP),
291 "this->replaceAllUsesWith\\(expr\\(this\\)\\) is NOT valid!");
292 }
293
294 #endif
295 #endif
296
297 #undef CHECK
298
TEST(ConstantsTest,ConstantArrayReplaceWithConstant)299 TEST(ConstantsTest, ConstantArrayReplaceWithConstant) {
300 LLVMContext Context;
301 std::unique_ptr<Module> M(new Module("MyModule", Context));
302
303 Type *IntTy = Type::getInt8Ty(Context);
304 ArrayType *ArrayTy = ArrayType::get(IntTy, 2);
305 Constant *A01Vals[2] = {ConstantInt::get(IntTy, 0),
306 ConstantInt::get(IntTy, 1)};
307 Constant *A01 = ConstantArray::get(ArrayTy, A01Vals);
308
309 Constant *Global = new GlobalVariable(*M, IntTy, false,
310 GlobalValue::ExternalLinkage, nullptr);
311 Constant *GlobalInt = ConstantExpr::getPtrToInt(Global, IntTy);
312 Constant *A0GVals[2] = {ConstantInt::get(IntTy, 0), GlobalInt};
313 Constant *A0G = ConstantArray::get(ArrayTy, A0GVals);
314 ASSERT_NE(A01, A0G);
315
316 GlobalVariable *RefArray =
317 new GlobalVariable(*M, ArrayTy, false, GlobalValue::ExternalLinkage, A0G);
318 ASSERT_EQ(A0G, RefArray->getInitializer());
319
320 GlobalInt->replaceAllUsesWith(ConstantInt::get(IntTy, 1));
321 ASSERT_EQ(A01, RefArray->getInitializer());
322 }
323
TEST(ConstantsTest,ConstantExprReplaceWithConstant)324 TEST(ConstantsTest, ConstantExprReplaceWithConstant) {
325 LLVMContext Context;
326 std::unique_ptr<Module> M(new Module("MyModule", Context));
327
328 Type *IntTy = Type::getInt8Ty(Context);
329 Constant *G1 = new GlobalVariable(*M, IntTy, false,
330 GlobalValue::ExternalLinkage, nullptr);
331 Constant *G2 = new GlobalVariable(*M, IntTy, false,
332 GlobalValue::ExternalLinkage, nullptr);
333 ASSERT_NE(G1, G2);
334
335 Constant *Int1 = ConstantExpr::getPtrToInt(G1, IntTy);
336 Constant *Int2 = ConstantExpr::getPtrToInt(G2, IntTy);
337 ASSERT_NE(Int1, Int2);
338
339 GlobalVariable *Ref =
340 new GlobalVariable(*M, IntTy, false, GlobalValue::ExternalLinkage, Int1);
341 ASSERT_EQ(Int1, Ref->getInitializer());
342
343 G1->replaceAllUsesWith(G2);
344 ASSERT_EQ(Int2, Ref->getInitializer());
345 }
346
TEST(ConstantsTest,GEPReplaceWithConstant)347 TEST(ConstantsTest, GEPReplaceWithConstant) {
348 LLVMContext Context;
349 std::unique_ptr<Module> M(new Module("MyModule", Context));
350
351 Type *IntTy = Type::getInt32Ty(Context);
352 Type *PtrTy = PointerType::get(IntTy, 0);
353 auto *C1 = ConstantInt::get(IntTy, 1);
354 auto *Placeholder = new GlobalVariable(
355 *M, IntTy, false, GlobalValue::ExternalWeakLinkage, nullptr);
356 auto *GEP = ConstantExpr::getGetElementPtr(IntTy, Placeholder, C1);
357 ASSERT_EQ(GEP->getOperand(0), Placeholder);
358
359 auto *Ref =
360 new GlobalVariable(*M, PtrTy, false, GlobalValue::ExternalLinkage, GEP);
361 ASSERT_EQ(GEP, Ref->getInitializer());
362
363 auto *Global = new GlobalVariable(*M, PtrTy, false,
364 GlobalValue::ExternalLinkage, nullptr);
365 auto *Alias = GlobalAlias::create(IntTy, 0, GlobalValue::ExternalLinkage,
366 "alias", Global, M.get());
367 Placeholder->replaceAllUsesWith(Alias);
368 ASSERT_EQ(GEP, Ref->getInitializer());
369 ASSERT_EQ(GEP->getOperand(0), Alias);
370 }
371
TEST(ConstantsTest,AliasCAPI)372 TEST(ConstantsTest, AliasCAPI) {
373 LLVMContext Context;
374 SMDiagnostic Error;
375 std::unique_ptr<Module> M =
376 parseAssemblyString("@g = global i32 42", Error, Context);
377 GlobalVariable *G = M->getGlobalVariable("g");
378 Type *I16Ty = Type::getInt16Ty(Context);
379 Type *I16PTy = PointerType::get(I16Ty, 0);
380 Constant *Aliasee = ConstantExpr::getBitCast(G, I16PTy);
381 LLVMValueRef AliasRef =
382 LLVMAddAlias(wrap(M.get()), wrap(I16PTy), wrap(Aliasee), "a");
383 ASSERT_EQ(unwrap<GlobalAlias>(AliasRef)->getAliasee(), Aliasee);
384 }
385
getNameOfType(Type * T)386 static std::string getNameOfType(Type *T) {
387 std::string S;
388 raw_string_ostream RSOS(S);
389 T->print(RSOS);
390 return S;
391 }
392
TEST(ConstantsTest,BuildConstantDataArrays)393 TEST(ConstantsTest, BuildConstantDataArrays) {
394 LLVMContext Context;
395 std::unique_ptr<Module> M(new Module("MyModule", Context));
396
397 for (Type *T : {Type::getInt8Ty(Context), Type::getInt16Ty(Context),
398 Type::getInt32Ty(Context), Type::getInt64Ty(Context)}) {
399 ArrayType *ArrayTy = ArrayType::get(T, 2);
400 Constant *Vals[] = {ConstantInt::get(T, 0), ConstantInt::get(T, 1)};
401 Constant *CDV = ConstantArray::get(ArrayTy, Vals);
402 ASSERT_TRUE(dyn_cast<ConstantDataArray>(CDV) != nullptr)
403 << " T = " << getNameOfType(T);
404 }
405
406 for (Type *T : {Type::getHalfTy(Context), Type::getFloatTy(Context),
407 Type::getDoubleTy(Context)}) {
408 ArrayType *ArrayTy = ArrayType::get(T, 2);
409 Constant *Vals[] = {ConstantFP::get(T, 0), ConstantFP::get(T, 1)};
410 Constant *CDV = ConstantArray::get(ArrayTy, Vals);
411 ASSERT_TRUE(dyn_cast<ConstantDataArray>(CDV) != nullptr)
412 << " T = " << getNameOfType(T);
413 }
414 }
415
TEST(ConstantsTest,BuildConstantDataVectors)416 TEST(ConstantsTest, BuildConstantDataVectors) {
417 LLVMContext Context;
418 std::unique_ptr<Module> M(new Module("MyModule", Context));
419
420 for (Type *T : {Type::getInt8Ty(Context), Type::getInt16Ty(Context),
421 Type::getInt32Ty(Context), Type::getInt64Ty(Context)}) {
422 Constant *Vals[] = {ConstantInt::get(T, 0), ConstantInt::get(T, 1)};
423 Constant *CDV = ConstantVector::get(Vals);
424 ASSERT_TRUE(dyn_cast<ConstantDataVector>(CDV) != nullptr)
425 << " T = " << getNameOfType(T);
426 }
427
428 for (Type *T : {Type::getHalfTy(Context), Type::getFloatTy(Context),
429 Type::getDoubleTy(Context)}) {
430 Constant *Vals[] = {ConstantFP::get(T, 0), ConstantFP::get(T, 1)};
431 Constant *CDV = ConstantVector::get(Vals);
432 ASSERT_TRUE(dyn_cast<ConstantDataVector>(CDV) != nullptr)
433 << " T = " << getNameOfType(T);
434 }
435 }
436
TEST(ConstantsTest,BitcastToGEP)437 TEST(ConstantsTest, BitcastToGEP) {
438 LLVMContext Context;
439 std::unique_ptr<Module> M(new Module("MyModule", Context));
440
441 auto *i32 = Type::getInt32Ty(Context);
442 auto *U = StructType::create(Context, "Unsized");
443 Type *EltTys[] = {i32, U};
444 auto *S = StructType::create(EltTys);
445
446 auto *G = new GlobalVariable(*M, S, false,
447 GlobalValue::ExternalLinkage, nullptr);
448 auto *PtrTy = PointerType::get(i32, 0);
449 auto *C = ConstantExpr::getBitCast(G, PtrTy);
450 ASSERT_EQ(dyn_cast<ConstantExpr>(C)->getOpcode(),
451 Instruction::BitCast);
452 }
453
454 } // end anonymous namespace
455 } // end namespace llvm
456