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/IR/Constants.h"
11 #include "llvm/IR/DerivedTypes.h"
12 #include "llvm/IR/InstrTypes.h"
13 #include "llvm/IR/Instruction.h"
14 #include "llvm/IR/LLVMContext.h"
15 #include "llvm/IR/Module.h"
16 #include "gtest/gtest.h"
17
18 namespace llvm {
19 namespace {
20
TEST(ConstantsTest,Integer_i1)21 TEST(ConstantsTest, Integer_i1) {
22 IntegerType* Int1 = IntegerType::get(getGlobalContext(), 1);
23 Constant* One = ConstantInt::get(Int1, 1, true);
24 Constant* Zero = ConstantInt::get(Int1, 0);
25 Constant* NegOne = ConstantInt::get(Int1, static_cast<uint64_t>(-1), true);
26 EXPECT_EQ(NegOne, ConstantInt::getSigned(Int1, -1));
27 Constant* Undef = UndefValue::get(Int1);
28
29 // Input: @b = constant i1 add(i1 1 , i1 1)
30 // Output: @b = constant i1 false
31 EXPECT_EQ(Zero, ConstantExpr::getAdd(One, One));
32
33 // @c = constant i1 add(i1 -1, i1 1)
34 // @c = constant i1 false
35 EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, One));
36
37 // @d = constant i1 add(i1 -1, i1 -1)
38 // @d = constant i1 false
39 EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, NegOne));
40
41 // @e = constant i1 sub(i1 -1, i1 1)
42 // @e = constant i1 false
43 EXPECT_EQ(Zero, ConstantExpr::getSub(NegOne, One));
44
45 // @f = constant i1 sub(i1 1 , i1 -1)
46 // @f = constant i1 false
47 EXPECT_EQ(Zero, ConstantExpr::getSub(One, NegOne));
48
49 // @g = constant i1 sub(i1 1 , i1 1)
50 // @g = constant i1 false
51 EXPECT_EQ(Zero, ConstantExpr::getSub(One, One));
52
53 // @h = constant i1 shl(i1 1 , i1 1) ; undefined
54 // @h = constant i1 undef
55 EXPECT_EQ(Undef, ConstantExpr::getShl(One, One));
56
57 // @i = constant i1 shl(i1 1 , i1 0)
58 // @i = constant i1 true
59 EXPECT_EQ(One, ConstantExpr::getShl(One, Zero));
60
61 // @j = constant i1 lshr(i1 1, i1 1) ; undefined
62 // @j = constant i1 undef
63 EXPECT_EQ(Undef, ConstantExpr::getLShr(One, One));
64
65 // @m = constant i1 ashr(i1 1, i1 1) ; undefined
66 // @m = constant i1 undef
67 EXPECT_EQ(Undef, ConstantExpr::getAShr(One, One));
68
69 // @n = constant i1 mul(i1 -1, i1 1)
70 // @n = constant i1 true
71 EXPECT_EQ(One, ConstantExpr::getMul(NegOne, One));
72
73 // @o = constant i1 sdiv(i1 -1, i1 1) ; overflow
74 // @o = constant i1 true
75 EXPECT_EQ(One, ConstantExpr::getSDiv(NegOne, One));
76
77 // @p = constant i1 sdiv(i1 1 , i1 -1); overflow
78 // @p = constant i1 true
79 EXPECT_EQ(One, ConstantExpr::getSDiv(One, NegOne));
80
81 // @q = constant i1 udiv(i1 -1, i1 1)
82 // @q = constant i1 true
83 EXPECT_EQ(One, ConstantExpr::getUDiv(NegOne, One));
84
85 // @r = constant i1 udiv(i1 1, i1 -1)
86 // @r = constant i1 true
87 EXPECT_EQ(One, ConstantExpr::getUDiv(One, NegOne));
88
89 // @s = constant i1 srem(i1 -1, i1 1) ; overflow
90 // @s = constant i1 false
91 EXPECT_EQ(Zero, ConstantExpr::getSRem(NegOne, One));
92
93 // @t = constant i1 urem(i1 -1, i1 1)
94 // @t = constant i1 false
95 EXPECT_EQ(Zero, ConstantExpr::getURem(NegOne, One));
96
97 // @u = constant i1 srem(i1 1, i1 -1) ; overflow
98 // @u = constant i1 false
99 EXPECT_EQ(Zero, ConstantExpr::getSRem(One, NegOne));
100 }
101
TEST(ConstantsTest,IntSigns)102 TEST(ConstantsTest, IntSigns) {
103 IntegerType* Int8Ty = Type::getInt8Ty(getGlobalContext());
104 EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, false)->getSExtValue());
105 EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, true)->getSExtValue());
106 EXPECT_EQ(100, ConstantInt::getSigned(Int8Ty, 100)->getSExtValue());
107 EXPECT_EQ(-50, ConstantInt::get(Int8Ty, 206)->getSExtValue());
108 EXPECT_EQ(-50, ConstantInt::getSigned(Int8Ty, -50)->getSExtValue());
109 EXPECT_EQ(206U, ConstantInt::getSigned(Int8Ty, -50)->getZExtValue());
110
111 // Overflow is handled by truncation.
112 EXPECT_EQ(0x3b, ConstantInt::get(Int8Ty, 0x13b)->getSExtValue());
113 }
114
TEST(ConstantsTest,FP128Test)115 TEST(ConstantsTest, FP128Test) {
116 Type *FP128Ty = Type::getFP128Ty(getGlobalContext());
117
118 IntegerType *Int128Ty = Type::getIntNTy(getGlobalContext(), 128);
119 Constant *Zero128 = Constant::getNullValue(Int128Ty);
120 Constant *X = ConstantExpr::getUIToFP(Zero128, FP128Ty);
121 EXPECT_TRUE(isa<ConstantFP>(X));
122 }
123
TEST(ConstantsTest,PointerCast)124 TEST(ConstantsTest, PointerCast) {
125 LLVMContext &C(getGlobalContext());
126 Type *Int8PtrTy = Type::getInt8PtrTy(C);
127 Type *Int32PtrTy = Type::getInt32PtrTy(C);
128 Type *Int64Ty = Type::getInt64Ty(C);
129 VectorType *Int8PtrVecTy = VectorType::get(Int8PtrTy, 4);
130 VectorType *Int32PtrVecTy = VectorType::get(Int32PtrTy, 4);
131 VectorType *Int64VecTy = VectorType::get(Int64Ty, 4);
132
133 // ptrtoint i8* to i64
134 EXPECT_EQ(Constant::getNullValue(Int64Ty),
135 ConstantExpr::getPointerCast(
136 Constant::getNullValue(Int8PtrTy), Int64Ty));
137
138 // bitcast i8* to i32*
139 EXPECT_EQ(Constant::getNullValue(Int32PtrTy),
140 ConstantExpr::getPointerCast(
141 Constant::getNullValue(Int8PtrTy), Int32PtrTy));
142
143 // ptrtoint <4 x i8*> to <4 x i64>
144 EXPECT_EQ(Constant::getNullValue(Int64VecTy),
145 ConstantExpr::getPointerCast(
146 Constant::getNullValue(Int8PtrVecTy), Int64VecTy));
147
148 // bitcast <4 x i8*> to <4 x i32*>
149 EXPECT_EQ(Constant::getNullValue(Int32PtrVecTy),
150 ConstantExpr::getPointerCast(
151 Constant::getNullValue(Int8PtrVecTy), Int32PtrVecTy));
152 }
153
154 #define CHECK(x, y) { \
155 std::string __s; \
156 raw_string_ostream __o(__s); \
157 Instruction *__I = cast<ConstantExpr>(x)->getAsInstruction(); \
158 __I->print(__o); \
159 delete __I; \
160 __o.flush(); \
161 EXPECT_EQ(std::string(" <badref> = " y), __s); \
162 }
163
TEST(ConstantsTest,AsInstructionsTest)164 TEST(ConstantsTest, AsInstructionsTest) {
165 OwningPtr<Module> M(new Module("MyModule", getGlobalContext()));
166
167 Type *Int64Ty = Type::getInt64Ty(getGlobalContext());
168 Type *Int32Ty = Type::getInt32Ty(getGlobalContext());
169 Type *Int16Ty = Type::getInt16Ty(getGlobalContext());
170 Type *Int1Ty = Type::getInt1Ty(getGlobalContext());
171 Type *FloatTy = Type::getFloatTy(getGlobalContext());
172 Type *DoubleTy = Type::getDoubleTy(getGlobalContext());
173
174 Constant *Global = M->getOrInsertGlobal("dummy",
175 PointerType::getUnqual(Int32Ty));
176 Constant *Global2 = M->getOrInsertGlobal("dummy2",
177 PointerType::getUnqual(Int32Ty));
178
179 Constant *P0 = ConstantExpr::getPtrToInt(Global, Int32Ty);
180 Constant *P1 = ConstantExpr::getUIToFP(P0, FloatTy);
181 Constant *P2 = ConstantExpr::getUIToFP(P0, DoubleTy);
182 Constant *P3 = ConstantExpr::getTrunc(P0, Int1Ty);
183 Constant *P4 = ConstantExpr::getPtrToInt(Global2, Int32Ty);
184 Constant *P5 = ConstantExpr::getUIToFP(P4, FloatTy);
185 Constant *P6 = ConstantExpr::getBitCast(P4, VectorType::get(Int16Ty, 2));
186
187 Constant *One = ConstantInt::get(Int32Ty, 1);
188
189 #define P0STR "ptrtoint (i32** @dummy to i32)"
190 #define P1STR "uitofp (i32 ptrtoint (i32** @dummy to i32) to float)"
191 #define P2STR "uitofp (i32 ptrtoint (i32** @dummy to i32) to double)"
192 #define P3STR "ptrtoint (i32** @dummy to i1)"
193 #define P4STR "ptrtoint (i32** @dummy2 to i32)"
194 #define P5STR "uitofp (i32 ptrtoint (i32** @dummy2 to i32) to float)"
195 #define P6STR "bitcast (i32 ptrtoint (i32** @dummy2 to i32) to <2 x i16>)"
196
197 CHECK(ConstantExpr::getNeg(P0), "sub i32 0, " P0STR);
198 CHECK(ConstantExpr::getFNeg(P1), "fsub float -0.000000e+00, " P1STR);
199 CHECK(ConstantExpr::getNot(P0), "xor i32 " P0STR ", -1");
200 CHECK(ConstantExpr::getAdd(P0, P0), "add i32 " P0STR ", " P0STR);
201 CHECK(ConstantExpr::getAdd(P0, P0, false, true), "add nsw i32 " P0STR ", "
202 P0STR);
203 CHECK(ConstantExpr::getAdd(P0, P0, true, true), "add nuw nsw i32 " P0STR ", "
204 P0STR);
205 CHECK(ConstantExpr::getFAdd(P1, P1), "fadd float " P1STR ", " P1STR);
206 CHECK(ConstantExpr::getSub(P0, P0), "sub i32 " P0STR ", " P0STR);
207 CHECK(ConstantExpr::getFSub(P1, P1), "fsub float " P1STR ", " P1STR);
208 CHECK(ConstantExpr::getMul(P0, P0), "mul i32 " P0STR ", " P0STR);
209 CHECK(ConstantExpr::getFMul(P1, P1), "fmul float " P1STR ", " P1STR);
210 CHECK(ConstantExpr::getUDiv(P0, P0), "udiv i32 " P0STR ", " P0STR);
211 CHECK(ConstantExpr::getSDiv(P0, P0), "sdiv i32 " P0STR ", " P0STR);
212 CHECK(ConstantExpr::getFDiv(P1, P1), "fdiv float " P1STR ", " P1STR);
213 CHECK(ConstantExpr::getURem(P0, P0), "urem i32 " P0STR ", " P0STR);
214 CHECK(ConstantExpr::getSRem(P0, P0), "srem i32 " P0STR ", " P0STR);
215 CHECK(ConstantExpr::getFRem(P1, P1), "frem float " P1STR ", " P1STR);
216 CHECK(ConstantExpr::getAnd(P0, P0), "and i32 " P0STR ", " P0STR);
217 CHECK(ConstantExpr::getOr(P0, P0), "or i32 " P0STR ", " P0STR);
218 CHECK(ConstantExpr::getXor(P0, P0), "xor i32 " P0STR ", " P0STR);
219 CHECK(ConstantExpr::getShl(P0, P0), "shl i32 " P0STR ", " P0STR);
220 CHECK(ConstantExpr::getShl(P0, P0, true), "shl nuw i32 " P0STR ", " P0STR);
221 CHECK(ConstantExpr::getShl(P0, P0, false, true), "shl nsw i32 " P0STR ", "
222 P0STR);
223 CHECK(ConstantExpr::getLShr(P0, P0, false), "lshr i32 " P0STR ", " P0STR);
224 CHECK(ConstantExpr::getLShr(P0, P0, true), "lshr exact i32 " P0STR ", " P0STR);
225 CHECK(ConstantExpr::getAShr(P0, P0, false), "ashr i32 " P0STR ", " P0STR);
226 CHECK(ConstantExpr::getAShr(P0, P0, true), "ashr exact i32 " P0STR ", " P0STR);
227
228 CHECK(ConstantExpr::getSExt(P0, Int64Ty), "sext i32 " P0STR " to i64");
229 CHECK(ConstantExpr::getZExt(P0, Int64Ty), "zext i32 " P0STR " to i64");
230 CHECK(ConstantExpr::getFPTrunc(P2, FloatTy), "fptrunc double " P2STR
231 " to float");
232 CHECK(ConstantExpr::getFPExtend(P1, DoubleTy), "fpext float " P1STR
233 " to double");
234
235 CHECK(ConstantExpr::getExactUDiv(P0, P0), "udiv exact i32 " P0STR ", " P0STR);
236
237 CHECK(ConstantExpr::getSelect(P3, P0, P4), "select i1 " P3STR ", i32 " P0STR
238 ", i32 " P4STR);
239 CHECK(ConstantExpr::getICmp(CmpInst::ICMP_EQ, P0, P4), "icmp eq i32 " P0STR
240 ", " P4STR);
241 CHECK(ConstantExpr::getFCmp(CmpInst::FCMP_ULT, P1, P5), "fcmp ult float "
242 P1STR ", " P5STR);
243
244 std::vector<Constant*> V;
245 V.push_back(One);
246 // FIXME: getGetElementPtr() actually creates an inbounds ConstantGEP,
247 // not a normal one!
248 //CHECK(ConstantExpr::getGetElementPtr(Global, V, false),
249 // "getelementptr i32** @dummy, i32 1");
250 CHECK(ConstantExpr::getInBoundsGetElementPtr(Global, V),
251 "getelementptr inbounds i32** @dummy, i32 1");
252
253 CHECK(ConstantExpr::getExtractElement(P6, One), "extractelement <2 x i16> "
254 P6STR ", i32 1");
255 }
256
257 #undef CHECK
258
259 } // end anonymous namespace
260 } // end namespace llvm
261