1 //===- llvm/unittest/IR/ConstantsTest.cpp - Constants unit tests ----------===//
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/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 "gtest/gtest.h"
23 TEST(ConstantsTest, Integer_i1) {
24 IntegerType* Int1 = IntegerType::get(getGlobalContext(), 1);
25 Constant* One = ConstantInt::get(Int1, 1, true);
26 Constant* Zero = ConstantInt::get(Int1, 0);
27 Constant* NegOne = ConstantInt::get(Int1, static_cast<uint64_t>(-1), true);
28 EXPECT_EQ(NegOne, ConstantInt::getSigned(Int1, -1));
29 Constant* Undef = UndefValue::get(Int1);
31 // Input: @b = constant i1 add(i1 1 , i1 1)
32 // Output: @b = constant i1 false
33 EXPECT_EQ(Zero, ConstantExpr::getAdd(One, One));
35 // @c = constant i1 add(i1 -1, i1 1)
36 // @c = constant i1 false
37 EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, One));
39 // @d = constant i1 add(i1 -1, i1 -1)
40 // @d = constant i1 false
41 EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, NegOne));
43 // @e = constant i1 sub(i1 -1, i1 1)
44 // @e = constant i1 false
45 EXPECT_EQ(Zero, ConstantExpr::getSub(NegOne, One));
47 // @f = constant i1 sub(i1 1 , i1 -1)
48 // @f = constant i1 false
49 EXPECT_EQ(Zero, ConstantExpr::getSub(One, NegOne));
51 // @g = constant i1 sub(i1 1 , i1 1)
52 // @g = constant i1 false
53 EXPECT_EQ(Zero, ConstantExpr::getSub(One, One));
55 // @h = constant i1 shl(i1 1 , i1 1) ; undefined
56 // @h = constant i1 undef
57 EXPECT_EQ(Undef, ConstantExpr::getShl(One, One));
59 // @i = constant i1 shl(i1 1 , i1 0)
60 // @i = constant i1 true
61 EXPECT_EQ(One, ConstantExpr::getShl(One, Zero));
63 // @j = constant i1 lshr(i1 1, i1 1) ; undefined
64 // @j = constant i1 undef
65 EXPECT_EQ(Undef, ConstantExpr::getLShr(One, One));
67 // @m = constant i1 ashr(i1 1, i1 1) ; undefined
68 // @m = constant i1 undef
69 EXPECT_EQ(Undef, ConstantExpr::getAShr(One, One));
71 // @n = constant i1 mul(i1 -1, i1 1)
72 // @n = constant i1 true
73 EXPECT_EQ(One, ConstantExpr::getMul(NegOne, One));
75 // @o = constant i1 sdiv(i1 -1, i1 1) ; overflow
76 // @o = constant i1 true
77 EXPECT_EQ(One, ConstantExpr::getSDiv(NegOne, One));
79 // @p = constant i1 sdiv(i1 1 , i1 -1); overflow
80 // @p = constant i1 true
81 EXPECT_EQ(One, ConstantExpr::getSDiv(One, NegOne));
83 // @q = constant i1 udiv(i1 -1, i1 1)
84 // @q = constant i1 true
85 EXPECT_EQ(One, ConstantExpr::getUDiv(NegOne, One));
87 // @r = constant i1 udiv(i1 1, i1 -1)
88 // @r = constant i1 true
89 EXPECT_EQ(One, ConstantExpr::getUDiv(One, NegOne));
91 // @s = constant i1 srem(i1 -1, i1 1) ; overflow
92 // @s = constant i1 false
93 EXPECT_EQ(Zero, ConstantExpr::getSRem(NegOne, One));
95 // @t = constant i1 urem(i1 -1, i1 1)
96 // @t = constant i1 false
97 EXPECT_EQ(Zero, ConstantExpr::getURem(NegOne, One));
99 // @u = constant i1 srem(i1 1, i1 -1) ; overflow
100 // @u = constant i1 false
101 EXPECT_EQ(Zero, ConstantExpr::getSRem(One, NegOne));
104 TEST(ConstantsTest, IntSigns) {
105 IntegerType* Int8Ty = Type::getInt8Ty(getGlobalContext());
106 EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, false)->getSExtValue());
107 EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, true)->getSExtValue());
108 EXPECT_EQ(100, ConstantInt::getSigned(Int8Ty, 100)->getSExtValue());
109 EXPECT_EQ(-50, ConstantInt::get(Int8Ty, 206)->getSExtValue());
110 EXPECT_EQ(-50, ConstantInt::getSigned(Int8Ty, -50)->getSExtValue());
111 EXPECT_EQ(206U, ConstantInt::getSigned(Int8Ty, -50)->getZExtValue());
113 // Overflow is handled by truncation.
114 EXPECT_EQ(0x3b, ConstantInt::get(Int8Ty, 0x13b)->getSExtValue());
117 TEST(ConstantsTest, FP128Test) {
118 Type *FP128Ty = Type::getFP128Ty(getGlobalContext());
120 IntegerType *Int128Ty = Type::getIntNTy(getGlobalContext(), 128);
121 Constant *Zero128 = Constant::getNullValue(Int128Ty);
122 Constant *X = ConstantExpr::getUIToFP(Zero128, FP128Ty);
123 EXPECT_TRUE(isa<ConstantFP>(X));
126 TEST(ConstantsTest, PointerCast) {
127 LLVMContext &C(getGlobalContext());
128 Type *Int8PtrTy = Type::getInt8PtrTy(C);
129 Type *Int32PtrTy = Type::getInt32PtrTy(C);
130 Type *Int64Ty = Type::getInt64Ty(C);
131 VectorType *Int8PtrVecTy = VectorType::get(Int8PtrTy, 4);
132 VectorType *Int32PtrVecTy = VectorType::get(Int32PtrTy, 4);
133 VectorType *Int64VecTy = VectorType::get(Int64Ty, 4);
135 // ptrtoint i8* to i64
136 EXPECT_EQ(Constant::getNullValue(Int64Ty),
137 ConstantExpr::getPointerCast(
138 Constant::getNullValue(Int8PtrTy), Int64Ty));
140 // bitcast i8* to i32*
141 EXPECT_EQ(Constant::getNullValue(Int32PtrTy),
142 ConstantExpr::getPointerCast(
143 Constant::getNullValue(Int8PtrTy), Int32PtrTy));
145 // ptrtoint <4 x i8*> to <4 x i64>
146 EXPECT_EQ(Constant::getNullValue(Int64VecTy),
147 ConstantExpr::getPointerCast(
148 Constant::getNullValue(Int8PtrVecTy), Int64VecTy));
150 // bitcast <4 x i8*> to <4 x i32*>
151 EXPECT_EQ(Constant::getNullValue(Int32PtrVecTy),
152 ConstantExpr::getPointerCast(
153 Constant::getNullValue(Int8PtrVecTy), Int32PtrVecTy));
156 #define CHECK(x, y) { \
158 raw_string_ostream __o(__s); \
159 Instruction *__I = cast<ConstantExpr>(x)->getAsInstruction(); \
163 EXPECT_EQ(std::string(" <badref> = " y), __s); \
166 TEST(ConstantsTest, AsInstructionsTest) {
167 std::unique_ptr<Module> M(new Module("MyModule", getGlobalContext()));
169 Type *Int64Ty = Type::getInt64Ty(getGlobalContext());
170 Type *Int32Ty = Type::getInt32Ty(getGlobalContext());
171 Type *Int16Ty = Type::getInt16Ty(getGlobalContext());
172 Type *Int1Ty = Type::getInt1Ty(getGlobalContext());
173 Type *FloatTy = Type::getFloatTy(getGlobalContext());
174 Type *DoubleTy = Type::getDoubleTy(getGlobalContext());
176 Constant *Global = M->getOrInsertGlobal("dummy",
177 PointerType::getUnqual(Int32Ty));
178 Constant *Global2 = M->getOrInsertGlobal("dummy2",
179 PointerType::getUnqual(Int32Ty));
181 Constant *P0 = ConstantExpr::getPtrToInt(Global, Int32Ty);
182 Constant *P1 = ConstantExpr::getUIToFP(P0, FloatTy);
183 Constant *P2 = ConstantExpr::getUIToFP(P0, DoubleTy);
184 Constant *P3 = ConstantExpr::getTrunc(P0, Int1Ty);
185 Constant *P4 = ConstantExpr::getPtrToInt(Global2, Int32Ty);
186 Constant *P5 = ConstantExpr::getUIToFP(P4, FloatTy);
187 Constant *P6 = ConstantExpr::getBitCast(P4, VectorType::get(Int16Ty, 2));
189 Constant *One = ConstantInt::get(Int32Ty, 1);
190 Constant *Two = ConstantInt::get(Int64Ty, 2);
191 Constant *Big = ConstantInt::get(getGlobalContext(),
192 APInt{256, uint64_t(-1), true});
193 Constant *Elt = ConstantInt::get(Int16Ty, 2015);
194 Constant *Undef16 = UndefValue::get(Int16Ty);
195 Constant *Undef64 = UndefValue::get(Int64Ty);
196 Constant *UndefV16 = UndefValue::get(P6->getType());
198 #define P0STR "ptrtoint (i32** @dummy to i32)"
199 #define P1STR "uitofp (i32 ptrtoint (i32** @dummy to i32) to float)"
200 #define P2STR "uitofp (i32 ptrtoint (i32** @dummy to i32) to double)"
201 #define P3STR "ptrtoint (i32** @dummy to i1)"
202 #define P4STR "ptrtoint (i32** @dummy2 to i32)"
203 #define P5STR "uitofp (i32 ptrtoint (i32** @dummy2 to i32) to float)"
204 #define P6STR "bitcast (i32 ptrtoint (i32** @dummy2 to i32) to <2 x i16>)"
206 CHECK(ConstantExpr::getNeg(P0), "sub i32 0, " P0STR);
207 CHECK(ConstantExpr::getFNeg(P1), "fsub float -0.000000e+00, " P1STR);
208 CHECK(ConstantExpr::getNot(P0), "xor i32 " P0STR ", -1");
209 CHECK(ConstantExpr::getAdd(P0, P0), "add i32 " P0STR ", " P0STR);
210 CHECK(ConstantExpr::getAdd(P0, P0, false, true), "add nsw i32 " P0STR ", "
212 CHECK(ConstantExpr::getAdd(P0, P0, true, true), "add nuw nsw i32 " P0STR ", "
214 CHECK(ConstantExpr::getFAdd(P1, P1), "fadd float " P1STR ", " P1STR);
215 CHECK(ConstantExpr::getSub(P0, P0), "sub i32 " P0STR ", " P0STR);
216 CHECK(ConstantExpr::getFSub(P1, P1), "fsub float " P1STR ", " P1STR);
217 CHECK(ConstantExpr::getMul(P0, P0), "mul i32 " P0STR ", " P0STR);
218 CHECK(ConstantExpr::getFMul(P1, P1), "fmul float " P1STR ", " P1STR);
219 CHECK(ConstantExpr::getUDiv(P0, P0), "udiv i32 " P0STR ", " P0STR);
220 CHECK(ConstantExpr::getSDiv(P0, P0), "sdiv i32 " P0STR ", " P0STR);
221 CHECK(ConstantExpr::getFDiv(P1, P1), "fdiv float " P1STR ", " P1STR);
222 CHECK(ConstantExpr::getURem(P0, P0), "urem i32 " P0STR ", " P0STR);
223 CHECK(ConstantExpr::getSRem(P0, P0), "srem i32 " P0STR ", " P0STR);
224 CHECK(ConstantExpr::getFRem(P1, P1), "frem float " P1STR ", " P1STR);
225 CHECK(ConstantExpr::getAnd(P0, P0), "and i32 " P0STR ", " P0STR);
226 CHECK(ConstantExpr::getOr(P0, P0), "or i32 " P0STR ", " P0STR);
227 CHECK(ConstantExpr::getXor(P0, P0), "xor i32 " P0STR ", " P0STR);
228 CHECK(ConstantExpr::getShl(P0, P0), "shl i32 " P0STR ", " P0STR);
229 CHECK(ConstantExpr::getShl(P0, P0, true), "shl nuw i32 " P0STR ", " P0STR);
230 CHECK(ConstantExpr::getShl(P0, P0, false, true), "shl nsw i32 " P0STR ", "
232 CHECK(ConstantExpr::getLShr(P0, P0, false), "lshr i32 " P0STR ", " P0STR);
233 CHECK(ConstantExpr::getLShr(P0, P0, true), "lshr exact i32 " P0STR ", " P0STR);
234 CHECK(ConstantExpr::getAShr(P0, P0, false), "ashr i32 " P0STR ", " P0STR);
235 CHECK(ConstantExpr::getAShr(P0, P0, true), "ashr exact i32 " P0STR ", " P0STR);
237 CHECK(ConstantExpr::getSExt(P0, Int64Ty), "sext i32 " P0STR " to i64");
238 CHECK(ConstantExpr::getZExt(P0, Int64Ty), "zext i32 " P0STR " to i64");
239 CHECK(ConstantExpr::getFPTrunc(P2, FloatTy), "fptrunc double " P2STR
241 CHECK(ConstantExpr::getFPExtend(P1, DoubleTy), "fpext float " P1STR
244 CHECK(ConstantExpr::getExactUDiv(P0, P0), "udiv exact i32 " P0STR ", " P0STR);
246 CHECK(ConstantExpr::getSelect(P3, P0, P4), "select i1 " P3STR ", i32 " P0STR
248 CHECK(ConstantExpr::getICmp(CmpInst::ICMP_EQ, P0, P4), "icmp eq i32 " P0STR
250 CHECK(ConstantExpr::getFCmp(CmpInst::FCMP_ULT, P1, P5), "fcmp ult float "
253 std::vector<Constant*> V;
255 // FIXME: getGetElementPtr() actually creates an inbounds ConstantGEP,
257 //CHECK(ConstantExpr::getGetElementPtr(Global, V, false),
258 // "getelementptr i32*, i32** @dummy, i32 1");
259 CHECK(ConstantExpr::getInBoundsGetElementPtr(PointerType::getUnqual(Int32Ty),
261 "getelementptr inbounds i32*, i32** @dummy, i32 1");
263 CHECK(ConstantExpr::getExtractElement(P6, One), "extractelement <2 x i16> "
266 EXPECT_EQ(Undef16, ConstantExpr::getExtractElement(P6, Two));
267 EXPECT_EQ(Undef16, ConstantExpr::getExtractElement(P6, Big));
268 EXPECT_EQ(Undef16, ConstantExpr::getExtractElement(P6, Undef64));
270 EXPECT_EQ(Elt, ConstantExpr::getExtractElement(
271 ConstantExpr::getInsertElement(P6, Elt, One), One));
272 EXPECT_EQ(UndefV16, ConstantExpr::getInsertElement(P6, Elt, Two));
273 EXPECT_EQ(UndefV16, ConstantExpr::getInsertElement(P6, Elt, Big));
274 EXPECT_EQ(UndefV16, ConstantExpr::getInsertElement(P6, Elt, Undef64));
277 #ifdef GTEST_HAS_DEATH_TEST
279 TEST(ConstantsTest, ReplaceWithConstantTest) {
280 std::unique_ptr<Module> M(new Module("MyModule", getGlobalContext()));
282 Type *Int32Ty = Type::getInt32Ty(getGlobalContext());
283 Constant *One = ConstantInt::get(Int32Ty, 1);
286 M->getOrInsertGlobal("dummy", PointerType::getUnqual(Int32Ty));
287 Constant *GEP = ConstantExpr::getGetElementPtr(
288 PointerType::getUnqual(Int32Ty), Global, One);
289 EXPECT_DEATH(Global->replaceAllUsesWith(GEP),
290 "this->replaceAllUsesWith\\(expr\\(this\\)\\) is NOT valid!");
298 TEST(ConstantsTest, ConstantArrayReplaceWithConstant) {
300 std::unique_ptr<Module> M(new Module("MyModule", Context));
302 Type *IntTy = Type::getInt8Ty(Context);
303 ArrayType *ArrayTy = ArrayType::get(IntTy, 2);
304 Constant *A01Vals[2] = {ConstantInt::get(IntTy, 0),
305 ConstantInt::get(IntTy, 1)};
306 Constant *A01 = ConstantArray::get(ArrayTy, A01Vals);
308 Constant *Global = new GlobalVariable(*M, IntTy, false,
309 GlobalValue::ExternalLinkage, nullptr);
310 Constant *GlobalInt = ConstantExpr::getPtrToInt(Global, IntTy);
311 Constant *A0GVals[2] = {ConstantInt::get(IntTy, 0), GlobalInt};
312 Constant *A0G = ConstantArray::get(ArrayTy, A0GVals);
315 GlobalVariable *RefArray =
316 new GlobalVariable(*M, ArrayTy, false, GlobalValue::ExternalLinkage, A0G);
317 ASSERT_EQ(A0G, RefArray->getInitializer());
319 GlobalInt->replaceAllUsesWith(ConstantInt::get(IntTy, 1));
320 ASSERT_EQ(A01, RefArray->getInitializer());
323 TEST(ConstantsTest, ConstantExprReplaceWithConstant) {
325 std::unique_ptr<Module> M(new Module("MyModule", Context));
327 Type *IntTy = Type::getInt8Ty(Context);
328 Constant *G1 = new GlobalVariable(*M, IntTy, false,
329 GlobalValue::ExternalLinkage, nullptr);
330 Constant *G2 = new GlobalVariable(*M, IntTy, false,
331 GlobalValue::ExternalLinkage, nullptr);
334 Constant *Int1 = ConstantExpr::getPtrToInt(G1, IntTy);
335 Constant *Int2 = ConstantExpr::getPtrToInt(G2, IntTy);
336 ASSERT_NE(Int1, Int2);
338 GlobalVariable *Ref =
339 new GlobalVariable(*M, IntTy, false, GlobalValue::ExternalLinkage, Int1);
340 ASSERT_EQ(Int1, Ref->getInitializer());
342 G1->replaceAllUsesWith(G2);
343 ASSERT_EQ(Int2, Ref->getInitializer());
346 TEST(ConstantsTest, GEPReplaceWithConstant) {
348 std::unique_ptr<Module> M(new Module("MyModule", Context));
350 Type *IntTy = Type::getInt32Ty(Context);
351 auto *PtrTy = PointerType::get(IntTy, 0);
352 auto *C1 = ConstantInt::get(IntTy, 1);
353 auto *Placeholder = new GlobalVariable(
354 *M, IntTy, false, GlobalValue::ExternalWeakLinkage, nullptr);
355 auto *GEP = ConstantExpr::getGetElementPtr(IntTy, Placeholder, C1);
356 ASSERT_EQ(GEP->getOperand(0), Placeholder);
359 new GlobalVariable(*M, PtrTy, false, GlobalValue::ExternalLinkage, GEP);
360 ASSERT_EQ(GEP, Ref->getInitializer());
362 auto *Global = new GlobalVariable(*M, PtrTy, false,
363 GlobalValue::ExternalLinkage, nullptr);
364 auto *Alias = GlobalAlias::create(PtrTy, GlobalValue::ExternalLinkage,
365 "alias", Global, M.get());
366 Placeholder->replaceAllUsesWith(Alias);
367 ASSERT_EQ(GEP, Ref->getInitializer());
368 ASSERT_EQ(GEP->getOperand(0), Alias);
371 TEST(ConstantsTest, AliasCAPI) {
374 std::unique_ptr<Module> M =
375 parseAssemblyString("@g = global i32 42", Error, Context);
376 GlobalVariable *G = M->getGlobalVariable("g");
377 Type *I16Ty = Type::getInt16Ty(Context);
378 Type *I16PTy = PointerType::get(I16Ty, 0);
379 Constant *Aliasee = ConstantExpr::getBitCast(G, I16PTy);
380 LLVMValueRef AliasRef =
381 LLVMAddAlias(wrap(M.get()), wrap(I16PTy), wrap(Aliasee), "a");
382 ASSERT_EQ(unwrap<GlobalAlias>(AliasRef)->getAliasee(), Aliasee);
385 } // end anonymous namespace
386 } // end namespace llvm