1 //===- llvm/unittest/IR/InstructionsTest.cpp - Instructions 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/Instructions.h"
11 #include "llvm/ADT/STLExtras.h"
12 #include "llvm/Analysis/ValueTracking.h"
13 #include "llvm/IR/BasicBlock.h"
14 #include "llvm/IR/Constants.h"
15 #include "llvm/IR/DataLayout.h"
16 #include "llvm/IR/DerivedTypes.h"
17 #include "llvm/IR/IRBuilder.h"
18 #include "llvm/IR/LLVMContext.h"
19 #include "llvm/IR/MDBuilder.h"
20 #include "llvm/IR/Operator.h"
21 #include "gtest/gtest.h"
22
23 namespace llvm {
24 namespace {
25
TEST(InstructionsTest,ReturnInst)26 TEST(InstructionsTest, ReturnInst) {
27 LLVMContext &C(getGlobalContext());
28
29 // test for PR6589
30 const ReturnInst* r0 = ReturnInst::Create(C);
31 EXPECT_EQ(r0->getNumOperands(), 0U);
32 EXPECT_EQ(r0->op_begin(), r0->op_end());
33
34 IntegerType* Int1 = IntegerType::get(C, 1);
35 Constant* One = ConstantInt::get(Int1, 1, true);
36 const ReturnInst* r1 = ReturnInst::Create(C, One);
37 EXPECT_EQ(1U, r1->getNumOperands());
38 User::const_op_iterator b(r1->op_begin());
39 EXPECT_NE(r1->op_end(), b);
40 EXPECT_EQ(One, *b);
41 EXPECT_EQ(One, r1->getOperand(0));
42 ++b;
43 EXPECT_EQ(r1->op_end(), b);
44
45 // clean up
46 delete r0;
47 delete r1;
48 }
49
TEST(InstructionsTest,BranchInst)50 TEST(InstructionsTest, BranchInst) {
51 LLVMContext &C(getGlobalContext());
52
53 // Make a BasicBlocks
54 BasicBlock* bb0 = BasicBlock::Create(C);
55 BasicBlock* bb1 = BasicBlock::Create(C);
56
57 // Mandatory BranchInst
58 const BranchInst* b0 = BranchInst::Create(bb0);
59
60 EXPECT_TRUE(b0->isUnconditional());
61 EXPECT_FALSE(b0->isConditional());
62 EXPECT_EQ(1U, b0->getNumSuccessors());
63
64 // check num operands
65 EXPECT_EQ(1U, b0->getNumOperands());
66
67 EXPECT_NE(b0->op_begin(), b0->op_end());
68 EXPECT_EQ(b0->op_end(), llvm::next(b0->op_begin()));
69
70 EXPECT_EQ(b0->op_end(), llvm::next(b0->op_begin()));
71
72 IntegerType* Int1 = IntegerType::get(C, 1);
73 Constant* One = ConstantInt::get(Int1, 1, true);
74
75 // Conditional BranchInst
76 BranchInst* b1 = BranchInst::Create(bb0, bb1, One);
77
78 EXPECT_FALSE(b1->isUnconditional());
79 EXPECT_TRUE(b1->isConditional());
80 EXPECT_EQ(2U, b1->getNumSuccessors());
81
82 // check num operands
83 EXPECT_EQ(3U, b1->getNumOperands());
84
85 User::const_op_iterator b(b1->op_begin());
86
87 // check COND
88 EXPECT_NE(b, b1->op_end());
89 EXPECT_EQ(One, *b);
90 EXPECT_EQ(One, b1->getOperand(0));
91 EXPECT_EQ(One, b1->getCondition());
92 ++b;
93
94 // check ELSE
95 EXPECT_EQ(bb1, *b);
96 EXPECT_EQ(bb1, b1->getOperand(1));
97 EXPECT_EQ(bb1, b1->getSuccessor(1));
98 ++b;
99
100 // check THEN
101 EXPECT_EQ(bb0, *b);
102 EXPECT_EQ(bb0, b1->getOperand(2));
103 EXPECT_EQ(bb0, b1->getSuccessor(0));
104 ++b;
105
106 EXPECT_EQ(b1->op_end(), b);
107
108 // clean up
109 delete b0;
110 delete b1;
111
112 delete bb0;
113 delete bb1;
114 }
115
TEST(InstructionsTest,CastInst)116 TEST(InstructionsTest, CastInst) {
117 LLVMContext &C(getGlobalContext());
118
119 Type* Int8Ty = Type::getInt8Ty(C);
120 Type* Int64Ty = Type::getInt64Ty(C);
121 Type* V8x8Ty = VectorType::get(Int8Ty, 8);
122 Type* V8x64Ty = VectorType::get(Int64Ty, 8);
123 Type* X86MMXTy = Type::getX86_MMXTy(C);
124
125 const Constant* c8 = Constant::getNullValue(V8x8Ty);
126 const Constant* c64 = Constant::getNullValue(V8x64Ty);
127
128 EXPECT_TRUE(CastInst::isCastable(V8x8Ty, X86MMXTy));
129 EXPECT_TRUE(CastInst::isCastable(X86MMXTy, V8x8Ty));
130 EXPECT_FALSE(CastInst::isCastable(Int64Ty, X86MMXTy));
131 EXPECT_TRUE(CastInst::isCastable(V8x64Ty, V8x8Ty));
132 EXPECT_TRUE(CastInst::isCastable(V8x8Ty, V8x64Ty));
133 EXPECT_EQ(CastInst::Trunc, CastInst::getCastOpcode(c64, true, V8x8Ty, true));
134 EXPECT_EQ(CastInst::SExt, CastInst::getCastOpcode(c8, true, V8x64Ty, true));
135 }
136
137
138
TEST(InstructionsTest,VectorGep)139 TEST(InstructionsTest, VectorGep) {
140 LLVMContext &C(getGlobalContext());
141
142 // Type Definitions
143 PointerType *Ptri8Ty = PointerType::get(IntegerType::get(C, 8), 0);
144 PointerType *Ptri32Ty = PointerType::get(IntegerType::get(C, 8), 0);
145
146 VectorType *V2xi8PTy = VectorType::get(Ptri8Ty, 2);
147 VectorType *V2xi32PTy = VectorType::get(Ptri32Ty, 2);
148
149 // Test different aspects of the vector-of-pointers type
150 // and GEPs which use this type.
151 ConstantInt *Ci32a = ConstantInt::get(C, APInt(32, 1492));
152 ConstantInt *Ci32b = ConstantInt::get(C, APInt(32, 1948));
153 std::vector<Constant*> ConstVa(2, Ci32a);
154 std::vector<Constant*> ConstVb(2, Ci32b);
155 Constant *C2xi32a = ConstantVector::get(ConstVa);
156 Constant *C2xi32b = ConstantVector::get(ConstVb);
157
158 CastInst *PtrVecA = new IntToPtrInst(C2xi32a, V2xi32PTy);
159 CastInst *PtrVecB = new IntToPtrInst(C2xi32b, V2xi32PTy);
160
161 ICmpInst *ICmp0 = new ICmpInst(ICmpInst::ICMP_SGT, PtrVecA, PtrVecB);
162 ICmpInst *ICmp1 = new ICmpInst(ICmpInst::ICMP_ULT, PtrVecA, PtrVecB);
163 EXPECT_NE(ICmp0, ICmp1); // suppress warning.
164
165 BasicBlock* BB0 = BasicBlock::Create(C);
166 // Test InsertAtEnd ICmpInst constructor.
167 ICmpInst *ICmp2 = new ICmpInst(*BB0, ICmpInst::ICMP_SGE, PtrVecA, PtrVecB);
168 EXPECT_NE(ICmp0, ICmp2); // suppress warning.
169
170 GetElementPtrInst *Gep0 = GetElementPtrInst::Create(PtrVecA, C2xi32a);
171 GetElementPtrInst *Gep1 = GetElementPtrInst::Create(PtrVecA, C2xi32b);
172 GetElementPtrInst *Gep2 = GetElementPtrInst::Create(PtrVecB, C2xi32a);
173 GetElementPtrInst *Gep3 = GetElementPtrInst::Create(PtrVecB, C2xi32b);
174
175 CastInst *BTC0 = new BitCastInst(Gep0, V2xi8PTy);
176 CastInst *BTC1 = new BitCastInst(Gep1, V2xi8PTy);
177 CastInst *BTC2 = new BitCastInst(Gep2, V2xi8PTy);
178 CastInst *BTC3 = new BitCastInst(Gep3, V2xi8PTy);
179
180 Value *S0 = BTC0->stripPointerCasts();
181 Value *S1 = BTC1->stripPointerCasts();
182 Value *S2 = BTC2->stripPointerCasts();
183 Value *S3 = BTC3->stripPointerCasts();
184
185 EXPECT_NE(S0, Gep0);
186 EXPECT_NE(S1, Gep1);
187 EXPECT_NE(S2, Gep2);
188 EXPECT_NE(S3, Gep3);
189
190 int64_t Offset;
191 DataLayout TD("e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f3"
192 "2:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80"
193 ":128:128-n8:16:32:64-S128");
194 // Make sure we don't crash
195 GetPointerBaseWithConstantOffset(Gep0, Offset, &TD);
196 GetPointerBaseWithConstantOffset(Gep1, Offset, &TD);
197 GetPointerBaseWithConstantOffset(Gep2, Offset, &TD);
198 GetPointerBaseWithConstantOffset(Gep3, Offset, &TD);
199
200 // Gep of Geps
201 GetElementPtrInst *GepII0 = GetElementPtrInst::Create(Gep0, C2xi32b);
202 GetElementPtrInst *GepII1 = GetElementPtrInst::Create(Gep1, C2xi32a);
203 GetElementPtrInst *GepII2 = GetElementPtrInst::Create(Gep2, C2xi32b);
204 GetElementPtrInst *GepII3 = GetElementPtrInst::Create(Gep3, C2xi32a);
205
206 EXPECT_EQ(GepII0->getNumIndices(), 1u);
207 EXPECT_EQ(GepII1->getNumIndices(), 1u);
208 EXPECT_EQ(GepII2->getNumIndices(), 1u);
209 EXPECT_EQ(GepII3->getNumIndices(), 1u);
210
211 EXPECT_FALSE(GepII0->hasAllZeroIndices());
212 EXPECT_FALSE(GepII1->hasAllZeroIndices());
213 EXPECT_FALSE(GepII2->hasAllZeroIndices());
214 EXPECT_FALSE(GepII3->hasAllZeroIndices());
215
216 delete GepII0;
217 delete GepII1;
218 delete GepII2;
219 delete GepII3;
220
221 delete BTC0;
222 delete BTC1;
223 delete BTC2;
224 delete BTC3;
225
226 delete Gep0;
227 delete Gep1;
228 delete Gep2;
229 delete Gep3;
230
231 ICmp2->eraseFromParent();
232 delete BB0;
233
234 delete ICmp0;
235 delete ICmp1;
236 delete PtrVecA;
237 delete PtrVecB;
238 }
239
TEST(InstructionsTest,FPMathOperator)240 TEST(InstructionsTest, FPMathOperator) {
241 LLVMContext &Context = getGlobalContext();
242 IRBuilder<> Builder(Context);
243 MDBuilder MDHelper(Context);
244 Instruction *I = Builder.CreatePHI(Builder.getDoubleTy(), 0);
245 MDNode *MD1 = MDHelper.createFPMath(1.0);
246 Value *V1 = Builder.CreateFAdd(I, I, "", MD1);
247 EXPECT_TRUE(isa<FPMathOperator>(V1));
248 FPMathOperator *O1 = cast<FPMathOperator>(V1);
249 EXPECT_EQ(O1->getFPAccuracy(), 1.0);
250 delete V1;
251 delete I;
252 }
253
254
TEST(InstructionsTest,isEliminableCastPair)255 TEST(InstructionsTest, isEliminableCastPair) {
256 LLVMContext &C(getGlobalContext());
257
258 Type* Int32Ty = Type::getInt32Ty(C);
259 Type* Int64Ty = Type::getInt64Ty(C);
260 Type* Int64PtrTy = Type::getInt64PtrTy(C);
261
262 // Source and destination pointers have same size -> bitcast.
263 EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
264 CastInst::IntToPtr,
265 Int64PtrTy, Int64Ty, Int64PtrTy,
266 Int32Ty, 0, Int32Ty),
267 CastInst::BitCast);
268
269 // Source and destination pointers have different sizes -> fail.
270 EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
271 CastInst::IntToPtr,
272 Int64PtrTy, Int64Ty, Int64PtrTy,
273 Int32Ty, 0, Int64Ty),
274 0U);
275
276 // Middle pointer big enough -> bitcast.
277 EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
278 CastInst::PtrToInt,
279 Int64Ty, Int64PtrTy, Int64Ty,
280 0, Int64Ty, 0),
281 CastInst::BitCast);
282
283 // Middle pointer too small -> fail.
284 EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
285 CastInst::PtrToInt,
286 Int64Ty, Int64PtrTy, Int64Ty,
287 0, Int32Ty, 0),
288 0U);
289 }
290
291 } // end anonymous namespace
292 } // end namespace llvm
293