Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "test/cctest/cctest.h" |
| 6 | |
| 7 | #include "src/base/utils/random-number-generator.h" |
| 8 | #include "src/compiler/graph-inl.h" |
| 9 | #include "src/compiler/js-graph.h" |
| 10 | #include "src/compiler/machine-operator-reducer.h" |
| 11 | #include "src/compiler/typer.h" |
| 12 | #include "test/cctest/compiler/value-helper.h" |
| 13 | |
| 14 | using namespace v8::internal; |
| 15 | using namespace v8::internal::compiler; |
| 16 | |
| 17 | template <typename T> |
| 18 | const Operator* NewConstantOperator(CommonOperatorBuilder* common, |
| 19 | volatile T value); |
| 20 | |
| 21 | template <> |
| 22 | const Operator* NewConstantOperator<int32_t>(CommonOperatorBuilder* common, |
| 23 | volatile int32_t value) { |
| 24 | return common->Int32Constant(value); |
| 25 | } |
| 26 | |
| 27 | template <> |
| 28 | const Operator* NewConstantOperator<double>(CommonOperatorBuilder* common, |
| 29 | volatile double value) { |
| 30 | return common->Float64Constant(value); |
| 31 | } |
| 32 | |
| 33 | |
| 34 | template <typename T> |
| 35 | T ValueOfOperator(const Operator* op); |
| 36 | |
| 37 | template <> |
| 38 | int32_t ValueOfOperator<int32_t>(const Operator* op) { |
| 39 | CHECK_EQ(IrOpcode::kInt32Constant, op->opcode()); |
| 40 | return OpParameter<int32_t>(op); |
| 41 | } |
| 42 | |
| 43 | template <> |
| 44 | double ValueOfOperator<double>(const Operator* op) { |
| 45 | CHECK_EQ(IrOpcode::kFloat64Constant, op->opcode()); |
| 46 | return OpParameter<double>(op); |
| 47 | } |
| 48 | |
| 49 | |
| 50 | class ReducerTester : public HandleAndZoneScope { |
| 51 | public: |
| 52 | explicit ReducerTester(int num_parameters = 0) |
| 53 | : isolate(main_isolate()), |
| 54 | binop(NULL), |
| 55 | unop(NULL), |
| 56 | common(main_zone()), |
| 57 | graph(main_zone()), |
| 58 | javascript(main_zone()), |
| 59 | typer(main_zone()), |
| 60 | jsgraph(&graph, &common, &javascript, &typer, &machine), |
| 61 | maxuint32(Constant<int32_t>(kMaxUInt32)) { |
| 62 | Node* s = graph.NewNode(common.Start(num_parameters)); |
| 63 | graph.SetStart(s); |
| 64 | } |
| 65 | |
| 66 | Isolate* isolate; |
| 67 | const Operator* binop; |
| 68 | const Operator* unop; |
| 69 | MachineOperatorBuilder machine; |
| 70 | CommonOperatorBuilder common; |
| 71 | Graph graph; |
| 72 | JSOperatorBuilder javascript; |
| 73 | Typer typer; |
| 74 | JSGraph jsgraph; |
| 75 | Node* maxuint32; |
| 76 | |
| 77 | template <typename T> |
| 78 | Node* Constant(volatile T value) { |
| 79 | return graph.NewNode(NewConstantOperator<T>(&common, value)); |
| 80 | } |
| 81 | |
| 82 | template <typename T> |
| 83 | const T ValueOf(const Operator* op) { |
| 84 | return ValueOfOperator<T>(op); |
| 85 | } |
| 86 | |
| 87 | // Check that the reduction of this binop applied to constants {a} and {b} |
| 88 | // yields the {expect} value. |
| 89 | template <typename T> |
| 90 | void CheckFoldBinop(volatile T expect, volatile T a, volatile T b) { |
| 91 | CheckFoldBinop<T>(expect, Constant<T>(a), Constant<T>(b)); |
| 92 | } |
| 93 | |
| 94 | // Check that the reduction of this binop applied to {a} and {b} yields |
| 95 | // the {expect} value. |
| 96 | template <typename T> |
| 97 | void CheckFoldBinop(volatile T expect, Node* a, Node* b) { |
| 98 | CHECK_NE(NULL, binop); |
| 99 | Node* n = graph.NewNode(binop, a, b); |
| 100 | MachineOperatorReducer reducer(&jsgraph); |
| 101 | Reduction reduction = reducer.Reduce(n); |
| 102 | CHECK(reduction.Changed()); |
| 103 | CHECK_NE(n, reduction.replacement()); |
| 104 | CHECK_EQ(expect, ValueOf<T>(reduction.replacement()->op())); |
| 105 | } |
| 106 | |
| 107 | // Check that the reduction of this binop applied to {a} and {b} yields |
| 108 | // the {expect} node. |
| 109 | void CheckBinop(Node* expect, Node* a, Node* b) { |
| 110 | CHECK_NE(NULL, binop); |
| 111 | Node* n = graph.NewNode(binop, a, b); |
| 112 | MachineOperatorReducer reducer(&jsgraph); |
| 113 | Reduction reduction = reducer.Reduce(n); |
| 114 | CHECK(reduction.Changed()); |
| 115 | CHECK_EQ(expect, reduction.replacement()); |
| 116 | } |
| 117 | |
| 118 | // Check that the reduction of this binop applied to {left} and {right} yields |
| 119 | // this binop applied to {left_expect} and {right_expect}. |
| 120 | void CheckFoldBinop(Node* left_expect, Node* right_expect, Node* left, |
| 121 | Node* right) { |
| 122 | CHECK_NE(NULL, binop); |
| 123 | Node* n = graph.NewNode(binop, left, right); |
| 124 | MachineOperatorReducer reducer(&jsgraph); |
| 125 | Reduction reduction = reducer.Reduce(n); |
| 126 | CHECK(reduction.Changed()); |
| 127 | CHECK_EQ(binop, reduction.replacement()->op()); |
| 128 | CHECK_EQ(left_expect, reduction.replacement()->InputAt(0)); |
| 129 | CHECK_EQ(right_expect, reduction.replacement()->InputAt(1)); |
| 130 | } |
| 131 | |
| 132 | // Check that the reduction of this binop applied to {left} and {right} yields |
| 133 | // the {op_expect} applied to {left_expect} and {right_expect}. |
| 134 | template <typename T> |
| 135 | void CheckFoldBinop(volatile T left_expect, const Operator* op_expect, |
| 136 | Node* right_expect, Node* left, Node* right) { |
| 137 | CHECK_NE(NULL, binop); |
| 138 | Node* n = graph.NewNode(binop, left, right); |
| 139 | MachineOperatorReducer reducer(&jsgraph); |
| 140 | Reduction r = reducer.Reduce(n); |
| 141 | CHECK(r.Changed()); |
| 142 | CHECK_EQ(op_expect->opcode(), r.replacement()->op()->opcode()); |
| 143 | CHECK_EQ(left_expect, ValueOf<T>(r.replacement()->InputAt(0)->op())); |
| 144 | CHECK_EQ(right_expect, r.replacement()->InputAt(1)); |
| 145 | } |
| 146 | |
| 147 | // Check that the reduction of this binop applied to {left} and {right} yields |
| 148 | // the {op_expect} applied to {left_expect} and {right_expect}. |
| 149 | template <typename T> |
| 150 | void CheckFoldBinop(Node* left_expect, const Operator* op_expect, |
| 151 | volatile T right_expect, Node* left, Node* right) { |
| 152 | CHECK_NE(NULL, binop); |
| 153 | Node* n = graph.NewNode(binop, left, right); |
| 154 | MachineOperatorReducer reducer(&jsgraph); |
| 155 | Reduction r = reducer.Reduce(n); |
| 156 | CHECK(r.Changed()); |
| 157 | CHECK_EQ(op_expect->opcode(), r.replacement()->op()->opcode()); |
| 158 | CHECK_EQ(left_expect, r.replacement()->InputAt(0)); |
| 159 | CHECK_EQ(right_expect, ValueOf<T>(r.replacement()->InputAt(1)->op())); |
| 160 | } |
| 161 | |
| 162 | // Check that if the given constant appears on the left, the reducer will |
| 163 | // swap it to be on the right. |
| 164 | template <typename T> |
| 165 | void CheckPutConstantOnRight(volatile T constant) { |
| 166 | // TODO(titzer): CHECK(binop->HasProperty(Operator::kCommutative)); |
| 167 | Node* p = Parameter(); |
| 168 | Node* k = Constant<T>(constant); |
| 169 | { |
| 170 | Node* n = graph.NewNode(binop, k, p); |
| 171 | MachineOperatorReducer reducer(&jsgraph); |
| 172 | Reduction reduction = reducer.Reduce(n); |
| 173 | CHECK(!reduction.Changed() || reduction.replacement() == n); |
| 174 | CHECK_EQ(p, n->InputAt(0)); |
| 175 | CHECK_EQ(k, n->InputAt(1)); |
| 176 | } |
| 177 | { |
| 178 | Node* n = graph.NewNode(binop, p, k); |
| 179 | MachineOperatorReducer reducer(&jsgraph); |
| 180 | Reduction reduction = reducer.Reduce(n); |
| 181 | CHECK(!reduction.Changed()); |
| 182 | CHECK_EQ(p, n->InputAt(0)); |
| 183 | CHECK_EQ(k, n->InputAt(1)); |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | // Check that if the given constant appears on the left, the reducer will |
| 188 | // *NOT* swap it to be on the right. |
| 189 | template <typename T> |
| 190 | void CheckDontPutConstantOnRight(volatile T constant) { |
| 191 | CHECK(!binop->HasProperty(Operator::kCommutative)); |
| 192 | Node* p = Parameter(); |
| 193 | Node* k = Constant<T>(constant); |
| 194 | Node* n = graph.NewNode(binop, k, p); |
| 195 | MachineOperatorReducer reducer(&jsgraph); |
| 196 | Reduction reduction = reducer.Reduce(n); |
| 197 | CHECK(!reduction.Changed()); |
| 198 | CHECK_EQ(k, n->InputAt(0)); |
| 199 | CHECK_EQ(p, n->InputAt(1)); |
| 200 | } |
| 201 | |
| 202 | Node* Parameter(int32_t index = 0) { |
| 203 | return graph.NewNode(common.Parameter(index), graph.start()); |
| 204 | } |
| 205 | }; |
| 206 | |
| 207 | |
| 208 | TEST(ReduceWord32And) { |
| 209 | ReducerTester R; |
| 210 | R.binop = R.machine.Word32And(); |
| 211 | |
| 212 | FOR_INT32_INPUTS(pl) { |
| 213 | FOR_INT32_INPUTS(pr) { |
| 214 | int32_t x = *pl, y = *pr; |
| 215 | R.CheckFoldBinop<int32_t>(x & y, x, y); |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | R.CheckPutConstantOnRight(33); |
| 220 | R.CheckPutConstantOnRight(44000); |
| 221 | |
| 222 | Node* x = R.Parameter(); |
| 223 | Node* zero = R.Constant<int32_t>(0); |
| 224 | Node* minus_1 = R.Constant<int32_t>(-1); |
| 225 | |
| 226 | R.CheckBinop(zero, x, zero); // x & 0 => 0 |
| 227 | R.CheckBinop(zero, zero, x); // 0 & x => 0 |
| 228 | R.CheckBinop(x, x, minus_1); // x & -1 => 0 |
| 229 | R.CheckBinop(x, minus_1, x); // -1 & x => 0 |
| 230 | R.CheckBinop(x, x, x); // x & x => x |
| 231 | } |
| 232 | |
| 233 | |
| 234 | TEST(ReduceWord32Or) { |
| 235 | ReducerTester R; |
| 236 | R.binop = R.machine.Word32Or(); |
| 237 | |
| 238 | FOR_INT32_INPUTS(pl) { |
| 239 | FOR_INT32_INPUTS(pr) { |
| 240 | int32_t x = *pl, y = *pr; |
| 241 | R.CheckFoldBinop<int32_t>(x | y, x, y); |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | R.CheckPutConstantOnRight(36); |
| 246 | R.CheckPutConstantOnRight(44001); |
| 247 | |
| 248 | Node* x = R.Parameter(); |
| 249 | Node* zero = R.Constant<int32_t>(0); |
| 250 | Node* minus_1 = R.Constant<int32_t>(-1); |
| 251 | |
| 252 | R.CheckBinop(x, x, zero); // x & 0 => x |
| 253 | R.CheckBinop(x, zero, x); // 0 & x => x |
| 254 | R.CheckBinop(minus_1, x, minus_1); // x & -1 => -1 |
| 255 | R.CheckBinop(minus_1, minus_1, x); // -1 & x => -1 |
| 256 | R.CheckBinop(x, x, x); // x & x => x |
| 257 | } |
| 258 | |
| 259 | |
| 260 | TEST(ReduceWord32Xor) { |
| 261 | ReducerTester R; |
| 262 | R.binop = R.machine.Word32Xor(); |
| 263 | |
| 264 | FOR_INT32_INPUTS(pl) { |
| 265 | FOR_INT32_INPUTS(pr) { |
| 266 | int32_t x = *pl, y = *pr; |
| 267 | R.CheckFoldBinop<int32_t>(x ^ y, x, y); |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | R.CheckPutConstantOnRight(39); |
| 272 | R.CheckPutConstantOnRight(4403); |
| 273 | |
| 274 | Node* x = R.Parameter(); |
| 275 | Node* zero = R.Constant<int32_t>(0); |
| 276 | |
| 277 | R.CheckBinop(x, x, zero); // x ^ 0 => x |
| 278 | R.CheckBinop(x, zero, x); // 0 ^ x => x |
| 279 | R.CheckFoldBinop<int32_t>(0, x, x); // x ^ x => 0 |
| 280 | } |
| 281 | |
| 282 | |
| 283 | TEST(ReduceWord32Shl) { |
| 284 | ReducerTester R; |
| 285 | R.binop = R.machine.Word32Shl(); |
| 286 | |
| 287 | // TODO(titzer): out of range shifts |
| 288 | FOR_INT32_INPUTS(i) { |
| 289 | for (int y = 0; y < 32; y++) { |
| 290 | int32_t x = *i; |
| 291 | R.CheckFoldBinop<int32_t>(x << y, x, y); |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | R.CheckDontPutConstantOnRight(44); |
| 296 | |
| 297 | Node* x = R.Parameter(); |
| 298 | Node* zero = R.Constant<int32_t>(0); |
| 299 | |
| 300 | R.CheckBinop(x, x, zero); // x << 0 => x |
| 301 | } |
| 302 | |
| 303 | |
| 304 | TEST(ReduceWord32Shr) { |
| 305 | ReducerTester R; |
| 306 | R.binop = R.machine.Word32Shr(); |
| 307 | |
| 308 | // TODO(titzer): test out of range shifts |
| 309 | FOR_UINT32_INPUTS(i) { |
| 310 | for (uint32_t y = 0; y < 32; y++) { |
| 311 | uint32_t x = *i; |
| 312 | R.CheckFoldBinop<int32_t>(x >> y, x, y); |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | R.CheckDontPutConstantOnRight(44); |
| 317 | |
| 318 | Node* x = R.Parameter(); |
| 319 | Node* zero = R.Constant<int32_t>(0); |
| 320 | |
| 321 | R.CheckBinop(x, x, zero); // x >>> 0 => x |
| 322 | } |
| 323 | |
| 324 | |
| 325 | TEST(ReduceWord32Sar) { |
| 326 | ReducerTester R; |
| 327 | R.binop = R.machine.Word32Sar(); |
| 328 | |
| 329 | // TODO(titzer): test out of range shifts |
| 330 | FOR_INT32_INPUTS(i) { |
| 331 | for (int32_t y = 0; y < 32; y++) { |
| 332 | int32_t x = *i; |
| 333 | R.CheckFoldBinop<int32_t>(x >> y, x, y); |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | R.CheckDontPutConstantOnRight(44); |
| 338 | |
| 339 | Node* x = R.Parameter(); |
| 340 | Node* zero = R.Constant<int32_t>(0); |
| 341 | |
| 342 | R.CheckBinop(x, x, zero); // x >> 0 => x |
| 343 | } |
| 344 | |
| 345 | |
| 346 | TEST(ReduceWord32Equal) { |
| 347 | ReducerTester R; |
| 348 | R.binop = R.machine.Word32Equal(); |
| 349 | |
| 350 | FOR_INT32_INPUTS(pl) { |
| 351 | FOR_INT32_INPUTS(pr) { |
| 352 | int32_t x = *pl, y = *pr; |
| 353 | R.CheckFoldBinop<int32_t>(x == y ? 1 : 0, x, y); |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | R.CheckPutConstantOnRight(48); |
| 358 | R.CheckPutConstantOnRight(-48); |
| 359 | |
| 360 | Node* x = R.Parameter(0); |
| 361 | Node* y = R.Parameter(1); |
| 362 | Node* zero = R.Constant<int32_t>(0); |
| 363 | Node* sub = R.graph.NewNode(R.machine.Int32Sub(), x, y); |
| 364 | |
| 365 | R.CheckFoldBinop<int32_t>(1, x, x); // x == x => 1 |
| 366 | R.CheckFoldBinop(x, y, sub, zero); // x - y == 0 => x == y |
| 367 | R.CheckFoldBinop(x, y, zero, sub); // 0 == x - y => x == y |
| 368 | } |
| 369 | |
| 370 | |
| 371 | TEST(ReduceInt32Add) { |
| 372 | ReducerTester R; |
| 373 | R.binop = R.machine.Int32Add(); |
| 374 | |
| 375 | FOR_INT32_INPUTS(pl) { |
| 376 | FOR_INT32_INPUTS(pr) { |
| 377 | int32_t x = *pl, y = *pr; |
| 378 | R.CheckFoldBinop<int32_t>(x + y, x, y); // TODO(titzer): signed overflow |
| 379 | } |
| 380 | } |
| 381 | |
| 382 | R.CheckPutConstantOnRight(41); |
| 383 | R.CheckPutConstantOnRight(4407); |
| 384 | |
| 385 | Node* x = R.Parameter(); |
| 386 | Node* zero = R.Constant<int32_t>(0); |
| 387 | |
| 388 | R.CheckBinop(x, x, zero); // x + 0 => x |
| 389 | R.CheckBinop(x, zero, x); // 0 + x => x |
| 390 | } |
| 391 | |
| 392 | |
| 393 | TEST(ReduceInt32Sub) { |
| 394 | ReducerTester R; |
| 395 | R.binop = R.machine.Int32Sub(); |
| 396 | |
| 397 | FOR_INT32_INPUTS(pl) { |
| 398 | FOR_INT32_INPUTS(pr) { |
| 399 | int32_t x = *pl, y = *pr; |
| 400 | R.CheckFoldBinop<int32_t>(x - y, x, y); |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | R.CheckDontPutConstantOnRight(412); |
| 405 | |
| 406 | Node* x = R.Parameter(); |
| 407 | Node* zero = R.Constant<int32_t>(0); |
| 408 | |
| 409 | R.CheckBinop(x, x, zero); // x - 0 => x |
| 410 | } |
| 411 | |
| 412 | |
| 413 | TEST(ReduceInt32Mul) { |
| 414 | ReducerTester R; |
| 415 | R.binop = R.machine.Int32Mul(); |
| 416 | |
| 417 | FOR_INT32_INPUTS(pl) { |
| 418 | FOR_INT32_INPUTS(pr) { |
| 419 | int32_t x = *pl, y = *pr; |
| 420 | R.CheckFoldBinop<int32_t>(x * y, x, y); // TODO(titzer): signed overflow |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | R.CheckPutConstantOnRight(4111); |
| 425 | R.CheckPutConstantOnRight(-4407); |
| 426 | |
| 427 | Node* x = R.Parameter(); |
| 428 | Node* zero = R.Constant<int32_t>(0); |
| 429 | Node* one = R.Constant<int32_t>(1); |
| 430 | Node* minus_one = R.Constant<int32_t>(-1); |
| 431 | |
| 432 | R.CheckBinop(zero, x, zero); // x * 0 => 0 |
| 433 | R.CheckBinop(zero, zero, x); // 0 * x => 0 |
| 434 | R.CheckBinop(x, x, one); // x * 1 => x |
| 435 | R.CheckBinop(x, one, x); // 1 * x => x |
| 436 | R.CheckFoldBinop<int32_t>(0, R.machine.Int32Sub(), x, minus_one, |
| 437 | x); // -1 * x => 0 - x |
| 438 | R.CheckFoldBinop<int32_t>(0, R.machine.Int32Sub(), x, x, |
| 439 | minus_one); // x * -1 => 0 - x |
| 440 | |
| 441 | for (int32_t n = 1; n < 31; ++n) { |
| 442 | Node* multiplier = R.Constant<int32_t>(1 << n); |
| 443 | R.CheckFoldBinop<int32_t>(x, R.machine.Word32Shl(), n, x, |
| 444 | multiplier); // x * 2^n => x << n |
| 445 | R.CheckFoldBinop<int32_t>(x, R.machine.Word32Shl(), n, multiplier, |
| 446 | x); // 2^n * x => x << n |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | |
| 451 | TEST(ReduceInt32Div) { |
| 452 | ReducerTester R; |
| 453 | R.binop = R.machine.Int32Div(); |
| 454 | |
| 455 | FOR_INT32_INPUTS(pl) { |
| 456 | FOR_INT32_INPUTS(pr) { |
| 457 | int32_t x = *pl, y = *pr; |
| 458 | if (y == 0) continue; // TODO(titzer): test / 0 |
| 459 | int32_t r = y == -1 ? -x : x / y; // INT_MIN / -1 may explode in C |
| 460 | R.CheckFoldBinop<int32_t>(r, x, y); |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | R.CheckDontPutConstantOnRight(41111); |
| 465 | R.CheckDontPutConstantOnRight(-44071); |
| 466 | |
| 467 | Node* x = R.Parameter(); |
| 468 | Node* one = R.Constant<int32_t>(1); |
| 469 | Node* minus_one = R.Constant<int32_t>(-1); |
| 470 | |
| 471 | R.CheckBinop(x, x, one); // x / 1 => x |
| 472 | // TODO(titzer): // 0 / x => 0 if x != 0 |
| 473 | // TODO(titzer): // x / 2^n => x >> n and round |
| 474 | R.CheckFoldBinop<int32_t>(0, R.machine.Int32Sub(), x, x, |
| 475 | minus_one); // x / -1 => 0 - x |
| 476 | } |
| 477 | |
| 478 | |
| 479 | TEST(ReduceInt32UDiv) { |
| 480 | ReducerTester R; |
| 481 | R.binop = R.machine.Int32UDiv(); |
| 482 | |
| 483 | FOR_UINT32_INPUTS(pl) { |
| 484 | FOR_UINT32_INPUTS(pr) { |
| 485 | uint32_t x = *pl, y = *pr; |
| 486 | if (y == 0) continue; // TODO(titzer): test / 0 |
| 487 | R.CheckFoldBinop<int32_t>(x / y, x, y); |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | R.CheckDontPutConstantOnRight(41311); |
| 492 | R.CheckDontPutConstantOnRight(-44371); |
| 493 | |
| 494 | Node* x = R.Parameter(); |
| 495 | Node* one = R.Constant<int32_t>(1); |
| 496 | |
| 497 | R.CheckBinop(x, x, one); // x / 1 => x |
| 498 | // TODO(titzer): // 0 / x => 0 if x != 0 |
| 499 | |
| 500 | for (uint32_t n = 1; n < 32; ++n) { |
| 501 | Node* divisor = R.Constant<int32_t>(1u << n); |
| 502 | R.CheckFoldBinop<int32_t>(x, R.machine.Word32Shr(), n, x, |
| 503 | divisor); // x / 2^n => x >> n |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | |
| 508 | TEST(ReduceInt32Mod) { |
| 509 | ReducerTester R; |
| 510 | R.binop = R.machine.Int32Mod(); |
| 511 | |
| 512 | FOR_INT32_INPUTS(pl) { |
| 513 | FOR_INT32_INPUTS(pr) { |
| 514 | int32_t x = *pl, y = *pr; |
| 515 | if (y == 0) continue; // TODO(titzer): test % 0 |
| 516 | int32_t r = y == -1 ? 0 : x % y; // INT_MIN % -1 may explode in C |
| 517 | R.CheckFoldBinop<int32_t>(r, x, y); |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | R.CheckDontPutConstantOnRight(413); |
| 522 | R.CheckDontPutConstantOnRight(-4401); |
| 523 | |
| 524 | Node* x = R.Parameter(); |
| 525 | Node* one = R.Constant<int32_t>(1); |
| 526 | |
| 527 | R.CheckFoldBinop<int32_t>(0, x, one); // x % 1 => 0 |
| 528 | // TODO(titzer): // x % 2^n => x & 2^n-1 and round |
| 529 | } |
| 530 | |
| 531 | |
| 532 | TEST(ReduceInt32UMod) { |
| 533 | ReducerTester R; |
| 534 | R.binop = R.machine.Int32UMod(); |
| 535 | |
| 536 | FOR_INT32_INPUTS(pl) { |
| 537 | FOR_INT32_INPUTS(pr) { |
| 538 | uint32_t x = *pl, y = *pr; |
| 539 | if (y == 0) continue; // TODO(titzer): test x % 0 |
| 540 | R.CheckFoldBinop<int32_t>(x % y, x, y); |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | R.CheckDontPutConstantOnRight(417); |
| 545 | R.CheckDontPutConstantOnRight(-4371); |
| 546 | |
| 547 | Node* x = R.Parameter(); |
| 548 | Node* one = R.Constant<int32_t>(1); |
| 549 | |
| 550 | R.CheckFoldBinop<int32_t>(0, x, one); // x % 1 => 0 |
| 551 | |
| 552 | for (uint32_t n = 1; n < 32; ++n) { |
| 553 | Node* divisor = R.Constant<int32_t>(1u << n); |
| 554 | R.CheckFoldBinop<int32_t>(x, R.machine.Word32And(), (1u << n) - 1, x, |
| 555 | divisor); // x % 2^n => x & 2^n-1 |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | |
| 560 | TEST(ReduceInt32LessThan) { |
| 561 | ReducerTester R; |
| 562 | R.binop = R.machine.Int32LessThan(); |
| 563 | |
| 564 | FOR_INT32_INPUTS(pl) { |
| 565 | FOR_INT32_INPUTS(pr) { |
| 566 | int32_t x = *pl, y = *pr; |
| 567 | R.CheckFoldBinop<int32_t>(x < y ? 1 : 0, x, y); |
| 568 | } |
| 569 | } |
| 570 | |
| 571 | R.CheckDontPutConstantOnRight(41399); |
| 572 | R.CheckDontPutConstantOnRight(-440197); |
| 573 | |
| 574 | Node* x = R.Parameter(0); |
| 575 | Node* y = R.Parameter(1); |
| 576 | Node* zero = R.Constant<int32_t>(0); |
| 577 | Node* sub = R.graph.NewNode(R.machine.Int32Sub(), x, y); |
| 578 | |
| 579 | R.CheckFoldBinop<int32_t>(0, x, x); // x < x => 0 |
| 580 | R.CheckFoldBinop(x, y, sub, zero); // x - y < 0 => x < y |
| 581 | R.CheckFoldBinop(y, x, zero, sub); // 0 < x - y => y < x |
| 582 | } |
| 583 | |
| 584 | |
| 585 | TEST(ReduceInt32LessThanOrEqual) { |
| 586 | ReducerTester R; |
| 587 | R.binop = R.machine.Int32LessThanOrEqual(); |
| 588 | |
| 589 | FOR_INT32_INPUTS(pl) { |
| 590 | FOR_INT32_INPUTS(pr) { |
| 591 | int32_t x = *pl, y = *pr; |
| 592 | R.CheckFoldBinop<int32_t>(x <= y ? 1 : 0, x, y); |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | FOR_INT32_INPUTS(i) { R.CheckDontPutConstantOnRight<int32_t>(*i); } |
| 597 | |
| 598 | Node* x = R.Parameter(0); |
| 599 | Node* y = R.Parameter(1); |
| 600 | Node* zero = R.Constant<int32_t>(0); |
| 601 | Node* sub = R.graph.NewNode(R.machine.Int32Sub(), x, y); |
| 602 | |
| 603 | R.CheckFoldBinop<int32_t>(1, x, x); // x <= x => 1 |
| 604 | R.CheckFoldBinop(x, y, sub, zero); // x - y <= 0 => x <= y |
| 605 | R.CheckFoldBinop(y, x, zero, sub); // 0 <= x - y => y <= x |
| 606 | } |
| 607 | |
| 608 | |
| 609 | TEST(ReduceUint32LessThan) { |
| 610 | ReducerTester R; |
| 611 | R.binop = R.machine.Uint32LessThan(); |
| 612 | |
| 613 | FOR_UINT32_INPUTS(pl) { |
| 614 | FOR_UINT32_INPUTS(pr) { |
| 615 | uint32_t x = *pl, y = *pr; |
| 616 | R.CheckFoldBinop<int32_t>(x < y ? 1 : 0, x, y); |
| 617 | } |
| 618 | } |
| 619 | |
| 620 | R.CheckDontPutConstantOnRight(41399); |
| 621 | R.CheckDontPutConstantOnRight(-440197); |
| 622 | |
| 623 | Node* x = R.Parameter(); |
| 624 | Node* max = R.maxuint32; |
| 625 | Node* zero = R.Constant<int32_t>(0); |
| 626 | |
| 627 | R.CheckFoldBinop<int32_t>(0, max, x); // M < x => 0 |
| 628 | R.CheckFoldBinop<int32_t>(0, x, zero); // x < 0 => 0 |
| 629 | R.CheckFoldBinop<int32_t>(0, x, x); // x < x => 0 |
| 630 | } |
| 631 | |
| 632 | |
| 633 | TEST(ReduceUint32LessThanOrEqual) { |
| 634 | ReducerTester R; |
| 635 | R.binop = R.machine.Uint32LessThanOrEqual(); |
| 636 | |
| 637 | FOR_UINT32_INPUTS(pl) { |
| 638 | FOR_UINT32_INPUTS(pr) { |
| 639 | uint32_t x = *pl, y = *pr; |
| 640 | R.CheckFoldBinop<int32_t>(x <= y ? 1 : 0, x, y); |
| 641 | } |
| 642 | } |
| 643 | |
| 644 | R.CheckDontPutConstantOnRight(41399); |
| 645 | R.CheckDontPutConstantOnRight(-440197); |
| 646 | |
| 647 | Node* x = R.Parameter(); |
| 648 | Node* max = R.maxuint32; |
| 649 | Node* zero = R.Constant<int32_t>(0); |
| 650 | |
| 651 | R.CheckFoldBinop<int32_t>(1, x, max); // x <= M => 1 |
| 652 | R.CheckFoldBinop<int32_t>(1, zero, x); // 0 <= x => 1 |
| 653 | R.CheckFoldBinop<int32_t>(1, x, x); // x <= x => 1 |
| 654 | } |
| 655 | |
| 656 | |
| 657 | TEST(ReduceLoadStore) { |
| 658 | ReducerTester R; |
| 659 | |
| 660 | Node* base = R.Constant<int32_t>(11); |
| 661 | Node* index = R.Constant<int32_t>(4); |
| 662 | Node* load = R.graph.NewNode(R.machine.Load(kMachInt32), base, index); |
| 663 | |
| 664 | { |
| 665 | MachineOperatorReducer reducer(&R.jsgraph); |
| 666 | Reduction reduction = reducer.Reduce(load); |
| 667 | CHECK(!reduction.Changed()); // loads should not be reduced. |
| 668 | } |
| 669 | |
| 670 | { |
| 671 | Node* store = R.graph.NewNode( |
| 672 | R.machine.Store(StoreRepresentation(kMachInt32, kNoWriteBarrier)), base, |
| 673 | index, load); |
| 674 | MachineOperatorReducer reducer(&R.jsgraph); |
| 675 | Reduction reduction = reducer.Reduce(store); |
| 676 | CHECK(!reduction.Changed()); // stores should not be reduced. |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | |
| 681 | static void CheckNans(ReducerTester* R) { |
| 682 | Node* x = R->Parameter(); |
| 683 | std::vector<double> nans = ValueHelper::nan_vector(); |
| 684 | for (std::vector<double>::const_iterator pl = nans.begin(); pl != nans.end(); |
| 685 | ++pl) { |
| 686 | for (std::vector<double>::const_iterator pr = nans.begin(); |
| 687 | pr != nans.end(); ++pr) { |
| 688 | Node* nan1 = R->Constant<double>(*pl); |
| 689 | Node* nan2 = R->Constant<double>(*pr); |
| 690 | R->CheckBinop(nan1, x, nan1); // x % NaN => NaN |
| 691 | R->CheckBinop(nan1, nan1, x); // NaN % x => NaN |
| 692 | R->CheckBinop(nan1, nan2, nan1); // NaN % NaN => NaN |
| 693 | } |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | |
| 698 | TEST(ReduceFloat64Add) { |
| 699 | ReducerTester R; |
| 700 | R.binop = R.machine.Float64Add(); |
| 701 | |
| 702 | FOR_FLOAT64_INPUTS(pl) { |
| 703 | FOR_FLOAT64_INPUTS(pr) { |
| 704 | double x = *pl, y = *pr; |
| 705 | R.CheckFoldBinop<double>(x + y, x, y); |
| 706 | } |
| 707 | } |
| 708 | |
| 709 | FOR_FLOAT64_INPUTS(i) { R.CheckPutConstantOnRight(*i); } |
| 710 | // TODO(titzer): CheckNans(&R); |
| 711 | } |
| 712 | |
| 713 | |
| 714 | TEST(ReduceFloat64Sub) { |
| 715 | ReducerTester R; |
| 716 | R.binop = R.machine.Float64Sub(); |
| 717 | |
| 718 | FOR_FLOAT64_INPUTS(pl) { |
| 719 | FOR_FLOAT64_INPUTS(pr) { |
| 720 | double x = *pl, y = *pr; |
| 721 | R.CheckFoldBinop<double>(x - y, x, y); |
| 722 | } |
| 723 | } |
| 724 | // TODO(titzer): CheckNans(&R); |
| 725 | } |
| 726 | |
| 727 | |
| 728 | TEST(ReduceFloat64Mul) { |
| 729 | ReducerTester R; |
| 730 | R.binop = R.machine.Float64Mul(); |
| 731 | |
| 732 | FOR_FLOAT64_INPUTS(pl) { |
| 733 | FOR_FLOAT64_INPUTS(pr) { |
| 734 | double x = *pl, y = *pr; |
| 735 | R.CheckFoldBinop<double>(x * y, x, y); |
| 736 | } |
| 737 | } |
| 738 | |
| 739 | double inf = V8_INFINITY; |
| 740 | R.CheckPutConstantOnRight(-inf); |
| 741 | R.CheckPutConstantOnRight(-0.1); |
| 742 | R.CheckPutConstantOnRight(0.1); |
| 743 | R.CheckPutConstantOnRight(inf); |
| 744 | |
| 745 | Node* x = R.Parameter(); |
| 746 | Node* one = R.Constant<double>(1.0); |
| 747 | |
| 748 | R.CheckBinop(x, x, one); // x * 1.0 => x |
| 749 | R.CheckBinop(x, one, x); // 1.0 * x => x |
| 750 | |
| 751 | CheckNans(&R); |
| 752 | } |
| 753 | |
| 754 | |
| 755 | TEST(ReduceFloat64Div) { |
| 756 | ReducerTester R; |
| 757 | R.binop = R.machine.Float64Div(); |
| 758 | |
| 759 | FOR_FLOAT64_INPUTS(pl) { |
| 760 | FOR_FLOAT64_INPUTS(pr) { |
| 761 | double x = *pl, y = *pr; |
| 762 | R.CheckFoldBinop<double>(x / y, x, y); |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | Node* x = R.Parameter(); |
| 767 | Node* one = R.Constant<double>(1.0); |
| 768 | |
| 769 | R.CheckBinop(x, x, one); // x / 1.0 => x |
| 770 | |
| 771 | CheckNans(&R); |
| 772 | } |
| 773 | |
| 774 | |
| 775 | TEST(ReduceFloat64Mod) { |
| 776 | ReducerTester R; |
| 777 | R.binop = R.machine.Float64Mod(); |
| 778 | |
| 779 | FOR_FLOAT64_INPUTS(pl) { |
| 780 | FOR_FLOAT64_INPUTS(pr) { |
| 781 | double x = *pl, y = *pr; |
| 782 | R.CheckFoldBinop<double>(modulo(x, y), x, y); |
| 783 | } |
| 784 | } |
| 785 | |
| 786 | CheckNans(&R); |
| 787 | } |
| 788 | |
| 789 | |
| 790 | // TODO(titzer): test MachineOperatorReducer for Word64And |
| 791 | // TODO(titzer): test MachineOperatorReducer for Word64Or |
| 792 | // TODO(titzer): test MachineOperatorReducer for Word64Xor |
| 793 | // TODO(titzer): test MachineOperatorReducer for Word64Shl |
| 794 | // TODO(titzer): test MachineOperatorReducer for Word64Shr |
| 795 | // TODO(titzer): test MachineOperatorReducer for Word64Sar |
| 796 | // TODO(titzer): test MachineOperatorReducer for Word64Equal |
| 797 | // TODO(titzer): test MachineOperatorReducer for Word64Not |
| 798 | // TODO(titzer): test MachineOperatorReducer for Int64Add |
| 799 | // TODO(titzer): test MachineOperatorReducer for Int64Sub |
| 800 | // TODO(titzer): test MachineOperatorReducer for Int64Mul |
| 801 | // TODO(titzer): test MachineOperatorReducer for Int64UMul |
| 802 | // TODO(titzer): test MachineOperatorReducer for Int64Div |
| 803 | // TODO(titzer): test MachineOperatorReducer for Int64UDiv |
| 804 | // TODO(titzer): test MachineOperatorReducer for Int64Mod |
| 805 | // TODO(titzer): test MachineOperatorReducer for Int64UMod |
| 806 | // TODO(titzer): test MachineOperatorReducer for Int64Neg |
| 807 | // TODO(titzer): test MachineOperatorReducer for ChangeInt32ToFloat64 |
| 808 | // TODO(titzer): test MachineOperatorReducer for ChangeFloat64ToInt32 |
| 809 | // TODO(titzer): test MachineOperatorReducer for Float64Compare |