1 //===---- llvm/unittest/IR/PatternMatch.cpp - PatternMatch 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/IR/PatternMatch.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/Function.h"
18 #include "llvm/IR/IRBuilder.h"
19 #include "llvm/IR/Instructions.h"
20 #include "llvm/IR/LLVMContext.h"
21 #include "llvm/IR/MDBuilder.h"
22 #include "llvm/IR/Module.h"
23 #include "llvm/IR/NoFolder.h"
24 #include "llvm/IR/Operator.h"
25 #include "llvm/IR/Type.h"
26 #include "gtest/gtest.h"
29 using namespace llvm::PatternMatch;
33 struct PatternMatchTest : ::testing::Test {
35 std::unique_ptr<Module> M;
38 IRBuilder<NoFolder> IRB;
41 : M(new Module("PatternMatchTestModule", Ctx)),
43 FunctionType::get(Type::getVoidTy(Ctx), /* IsVarArg */ false),
44 Function::ExternalLinkage, "f", M.get())),
45 BB(BasicBlock::Create(Ctx, "entry", F)), IRB(BB) {}
48 TEST_F(PatternMatchTest, OneUse) {
49 // Build up a little tree of values:
53 // Leaf = (Two + 8) + (Two + 13)
54 Value *One = IRB.CreateAdd(IRB.CreateAdd(IRB.getInt32(1), IRB.getInt32(2)),
56 Value *Two = IRB.CreateAdd(One, IRB.getInt32(42));
57 Value *Leaf = IRB.CreateAdd(IRB.CreateAdd(Two, IRB.getInt32(8)),
58 IRB.CreateAdd(Two, IRB.getInt32(13)));
61 EXPECT_TRUE(m_OneUse(m_Value(V)).match(One));
64 EXPECT_FALSE(m_OneUse(m_Value()).match(Two));
65 EXPECT_FALSE(m_OneUse(m_Value()).match(Leaf));
68 TEST_F(PatternMatchTest, FloatingPointOrderedMin) {
69 Type *FltTy = IRB.getFloatTy();
70 Value *L = ConstantFP::get(FltTy, 1.0);
71 Value *R = ConstantFP::get(FltTy, 2.0);
72 Value *MatchL, *MatchR;
75 EXPECT_TRUE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
76 .match(IRB.CreateSelect(IRB.CreateFCmpOLT(L, R), L, R)));
81 EXPECT_TRUE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
82 .match(IRB.CreateSelect(IRB.CreateFCmpOLE(L, R), L, R)));
86 // Test no match on OGE.
87 EXPECT_FALSE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
88 .match(IRB.CreateSelect(IRB.CreateFCmpOGE(L, R), L, R)));
90 // Test no match on OGT.
91 EXPECT_FALSE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
92 .match(IRB.CreateSelect(IRB.CreateFCmpOGT(L, R), L, R)));
94 // Test inverted selects. Note, that this "inverts" the ordering, e.g.:
95 // %cmp = fcmp oge L, R
96 // %min = select %cmp R, L
98 // the above is expanded to %cmp == false ==> %min = L
99 // which is true for UnordFMin, not OrdFMin, so test that:
101 // [OU]GE with inverted select.
102 EXPECT_FALSE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
103 .match(IRB.CreateSelect(IRB.CreateFCmpOGE(L, R), R, L)));
104 EXPECT_TRUE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
105 .match(IRB.CreateSelect(IRB.CreateFCmpUGE(L, R), R, L)));
106 EXPECT_EQ(L, MatchL);
107 EXPECT_EQ(R, MatchR);
109 // [OU]GT with inverted select.
110 EXPECT_FALSE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
111 .match(IRB.CreateSelect(IRB.CreateFCmpOGT(L, R), R, L)));
112 EXPECT_TRUE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
113 .match(IRB.CreateSelect(IRB.CreateFCmpUGT(L, R), R, L)));
114 EXPECT_EQ(L, MatchL);
115 EXPECT_EQ(R, MatchR);
118 TEST_F(PatternMatchTest, FloatingPointOrderedMax) {
119 Type *FltTy = IRB.getFloatTy();
120 Value *L = ConstantFP::get(FltTy, 1.0);
121 Value *R = ConstantFP::get(FltTy, 2.0);
122 Value *MatchL, *MatchR;
125 EXPECT_TRUE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
126 .match(IRB.CreateSelect(IRB.CreateFCmpOGT(L, R), L, R)));
127 EXPECT_EQ(L, MatchL);
128 EXPECT_EQ(R, MatchR);
131 EXPECT_TRUE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
132 .match(IRB.CreateSelect(IRB.CreateFCmpOGE(L, R), L, R)));
133 EXPECT_EQ(L, MatchL);
134 EXPECT_EQ(R, MatchR);
136 // Test no match on OLE.
137 EXPECT_FALSE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
138 .match(IRB.CreateSelect(IRB.CreateFCmpOLE(L, R), L, R)));
140 // Test no match on OLT.
141 EXPECT_FALSE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
142 .match(IRB.CreateSelect(IRB.CreateFCmpOLT(L, R), L, R)));
145 // Test inverted selects. Note, that this "inverts" the ordering, e.g.:
146 // %cmp = fcmp ole L, R
147 // %max = select %cmp, R, L
149 // the above is expanded to %cmp == false ==> %max == L
150 // which is true for UnordFMax, not OrdFMax, so test that:
152 // [OU]LE with inverted select.
153 EXPECT_FALSE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
154 .match(IRB.CreateSelect(IRB.CreateFCmpOLE(L, R), R, L)));
155 EXPECT_TRUE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
156 .match(IRB.CreateSelect(IRB.CreateFCmpULE(L, R), R, L)));
157 EXPECT_EQ(L, MatchL);
158 EXPECT_EQ(R, MatchR);
160 // [OUT]LT with inverted select.
161 EXPECT_FALSE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
162 .match(IRB.CreateSelect(IRB.CreateFCmpOLT(L, R), R, L)));
163 EXPECT_TRUE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
164 .match(IRB.CreateSelect(IRB.CreateFCmpULT(L, R), R, L)));
165 EXPECT_EQ(L, MatchL);
166 EXPECT_EQ(R, MatchR);
169 TEST_F(PatternMatchTest, FloatingPointUnorderedMin) {
170 Type *FltTy = IRB.getFloatTy();
171 Value *L = ConstantFP::get(FltTy, 1.0);
172 Value *R = ConstantFP::get(FltTy, 2.0);
173 Value *MatchL, *MatchR;
176 EXPECT_TRUE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
177 .match(IRB.CreateSelect(IRB.CreateFCmpULT(L, R), L, R)));
178 EXPECT_EQ(L, MatchL);
179 EXPECT_EQ(R, MatchR);
182 EXPECT_TRUE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
183 .match(IRB.CreateSelect(IRB.CreateFCmpULE(L, R), L, R)));
184 EXPECT_EQ(L, MatchL);
185 EXPECT_EQ(R, MatchR);
187 // Test no match on UGE.
188 EXPECT_FALSE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
189 .match(IRB.CreateSelect(IRB.CreateFCmpUGE(L, R), L, R)));
191 // Test no match on UGT.
192 EXPECT_FALSE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
193 .match(IRB.CreateSelect(IRB.CreateFCmpUGT(L, R), L, R)));
195 // Test inverted selects. Note, that this "inverts" the ordering, e.g.:
196 // %cmp = fcmp uge L, R
197 // %min = select %cmp R, L
199 // the above is expanded to %cmp == true ==> %min = R
200 // which is true for OrdFMin, not UnordFMin, so test that:
202 // [UO]GE with inverted select.
203 EXPECT_FALSE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
204 .match(IRB.CreateSelect(IRB.CreateFCmpUGE(L, R), R, L)));
205 EXPECT_TRUE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
206 .match(IRB.CreateSelect(IRB.CreateFCmpOGE(L, R), R, L)));
207 EXPECT_EQ(L, MatchL);
208 EXPECT_EQ(R, MatchR);
210 // [UO]GT with inverted select.
211 EXPECT_FALSE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
212 .match(IRB.CreateSelect(IRB.CreateFCmpUGT(L, R), R, L)));
213 EXPECT_TRUE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
214 .match(IRB.CreateSelect(IRB.CreateFCmpOGT(L, R), R, L)));
215 EXPECT_EQ(L, MatchL);
216 EXPECT_EQ(R, MatchR);
219 TEST_F(PatternMatchTest, FloatingPointUnorderedMax) {
220 Type *FltTy = IRB.getFloatTy();
221 Value *L = ConstantFP::get(FltTy, 1.0);
222 Value *R = ConstantFP::get(FltTy, 2.0);
223 Value *MatchL, *MatchR;
226 EXPECT_TRUE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
227 .match(IRB.CreateSelect(IRB.CreateFCmpUGT(L, R), L, R)));
228 EXPECT_EQ(L, MatchL);
229 EXPECT_EQ(R, MatchR);
232 EXPECT_TRUE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
233 .match(IRB.CreateSelect(IRB.CreateFCmpUGE(L, R), L, R)));
234 EXPECT_EQ(L, MatchL);
235 EXPECT_EQ(R, MatchR);
237 // Test no match on ULE.
238 EXPECT_FALSE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
239 .match(IRB.CreateSelect(IRB.CreateFCmpULE(L, R), L, R)));
241 // Test no match on ULT.
242 EXPECT_FALSE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
243 .match(IRB.CreateSelect(IRB.CreateFCmpULT(L, R), L, R)));
245 // Test inverted selects. Note, that this "inverts" the ordering, e.g.:
246 // %cmp = fcmp ule L, R
247 // %max = select %cmp R, L
249 // the above is expanded to %cmp == true ==> %max = R
250 // which is true for OrdFMax, not UnordFMax, so test that:
252 // [UO]LE with inverted select.
253 EXPECT_FALSE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
254 .match(IRB.CreateSelect(IRB.CreateFCmpULE(L, R), R, L)));
255 EXPECT_TRUE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
256 .match(IRB.CreateSelect(IRB.CreateFCmpOLE(L, R), R, L)));
257 EXPECT_EQ(L, MatchL);
258 EXPECT_EQ(R, MatchR);
260 // [UO]LT with inverted select.
261 EXPECT_FALSE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
262 .match(IRB.CreateSelect(IRB.CreateFCmpULT(L, R), R, L)));
263 EXPECT_TRUE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
264 .match(IRB.CreateSelect(IRB.CreateFCmpOLT(L, R), R, L)));
265 EXPECT_EQ(L, MatchL);
266 EXPECT_EQ(R, MatchR);
269 TEST_F(PatternMatchTest, OverflowingBinOps) {
270 Value *L = IRB.getInt32(1);
271 Value *R = IRB.getInt32(2);
272 Value *MatchL, *MatchR;
275 m_NSWAdd(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNSWAdd(L, R)));
276 EXPECT_EQ(L, MatchL);
277 EXPECT_EQ(R, MatchR);
278 MatchL = MatchR = nullptr;
280 m_NSWSub(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNSWSub(L, R)));
281 EXPECT_EQ(L, MatchL);
282 EXPECT_EQ(R, MatchR);
283 MatchL = MatchR = nullptr;
285 m_NSWMul(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNSWMul(L, R)));
286 EXPECT_EQ(L, MatchL);
287 EXPECT_EQ(R, MatchR);
288 MatchL = MatchR = nullptr;
289 EXPECT_TRUE(m_NSWShl(m_Value(MatchL), m_Value(MatchR)).match(
290 IRB.CreateShl(L, R, "", /* NUW */ false, /* NSW */ true)));
291 EXPECT_EQ(L, MatchL);
292 EXPECT_EQ(R, MatchR);
295 m_NUWAdd(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNUWAdd(L, R)));
296 EXPECT_EQ(L, MatchL);
297 EXPECT_EQ(R, MatchR);
298 MatchL = MatchR = nullptr;
300 m_NUWSub(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNUWSub(L, R)));
301 EXPECT_EQ(L, MatchL);
302 EXPECT_EQ(R, MatchR);
303 MatchL = MatchR = nullptr;
305 m_NUWMul(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNUWMul(L, R)));
306 EXPECT_EQ(L, MatchL);
307 EXPECT_EQ(R, MatchR);
308 MatchL = MatchR = nullptr;
309 EXPECT_TRUE(m_NUWShl(m_Value(MatchL), m_Value(MatchR)).match(
310 IRB.CreateShl(L, R, "", /* NUW */ true, /* NSW */ false)));
311 EXPECT_EQ(L, MatchL);
312 EXPECT_EQ(R, MatchR);
314 EXPECT_FALSE(m_NSWAdd(m_Value(), m_Value()).match(IRB.CreateAdd(L, R)));
315 EXPECT_FALSE(m_NSWAdd(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
316 EXPECT_FALSE(m_NSWAdd(m_Value(), m_Value()).match(IRB.CreateNSWSub(L, R)));
317 EXPECT_FALSE(m_NSWSub(m_Value(), m_Value()).match(IRB.CreateSub(L, R)));
318 EXPECT_FALSE(m_NSWSub(m_Value(), m_Value()).match(IRB.CreateNUWSub(L, R)));
319 EXPECT_FALSE(m_NSWSub(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
320 EXPECT_FALSE(m_NSWMul(m_Value(), m_Value()).match(IRB.CreateMul(L, R)));
321 EXPECT_FALSE(m_NSWMul(m_Value(), m_Value()).match(IRB.CreateNUWMul(L, R)));
322 EXPECT_FALSE(m_NSWMul(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
323 EXPECT_FALSE(m_NSWShl(m_Value(), m_Value()).match(IRB.CreateShl(L, R)));
324 EXPECT_FALSE(m_NSWShl(m_Value(), m_Value()).match(
325 IRB.CreateShl(L, R, "", /* NUW */ true, /* NSW */ false)));
326 EXPECT_FALSE(m_NSWShl(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
328 EXPECT_FALSE(m_NUWAdd(m_Value(), m_Value()).match(IRB.CreateAdd(L, R)));
329 EXPECT_FALSE(m_NUWAdd(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
330 EXPECT_FALSE(m_NUWAdd(m_Value(), m_Value()).match(IRB.CreateNUWSub(L, R)));
331 EXPECT_FALSE(m_NUWSub(m_Value(), m_Value()).match(IRB.CreateSub(L, R)));
332 EXPECT_FALSE(m_NUWSub(m_Value(), m_Value()).match(IRB.CreateNSWSub(L, R)));
333 EXPECT_FALSE(m_NUWSub(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
334 EXPECT_FALSE(m_NUWMul(m_Value(), m_Value()).match(IRB.CreateMul(L, R)));
335 EXPECT_FALSE(m_NUWMul(m_Value(), m_Value()).match(IRB.CreateNSWMul(L, R)));
336 EXPECT_FALSE(m_NUWMul(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
337 EXPECT_FALSE(m_NUWShl(m_Value(), m_Value()).match(IRB.CreateShl(L, R)));
338 EXPECT_FALSE(m_NUWShl(m_Value(), m_Value()).match(
339 IRB.CreateShl(L, R, "", /* NUW */ false, /* NSW */ true)));
340 EXPECT_FALSE(m_NUWShl(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
343 template <typename T> struct MutableConstTest : PatternMatchTest { };
345 typedef ::testing::Types<std::tuple<Value*, Instruction*>,
346 std::tuple<const Value*, const Instruction *>>
347 MutableConstTestTypes;
348 TYPED_TEST_CASE(MutableConstTest, MutableConstTestTypes);
350 TYPED_TEST(MutableConstTest, ICmp) {
351 auto &IRB = PatternMatchTest::IRB;
353 typedef typename std::tuple_element<0, TypeParam>::type ValueType;
354 typedef typename std::tuple_element<1, TypeParam>::type InstructionType;
356 Value *L = IRB.getInt32(1);
357 Value *R = IRB.getInt32(2);
358 ICmpInst::Predicate Pred = ICmpInst::ICMP_UGT;
362 ICmpInst::Predicate MatchPred;
364 EXPECT_TRUE(m_ICmp(MatchPred, m_Value(MatchL), m_Value(MatchR))
365 .match((InstructionType)IRB.CreateICmp(Pred, L, R)));
366 EXPECT_EQ(L, MatchL);
367 EXPECT_EQ(R, MatchR);
370 } // anonymous namespace.