Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 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 | |
| 6 | #include "test/unittests/compiler/live-range-builder.h" |
| 7 | #include "test/unittests/test-utils.h" |
| 8 | |
| 9 | |
| 10 | // TODO(mtrofin): would we want to centralize this definition? |
| 11 | #ifdef DEBUG |
| 12 | #define V8_ASSERT_DEBUG_DEATH(statement, regex) \ |
| 13 | ASSERT_DEATH_IF_SUPPORTED(statement, regex) |
| 14 | #define DISABLE_IN_RELEASE(Name) Name |
| 15 | |
| 16 | #else |
| 17 | #define V8_ASSERT_DEBUG_DEATH(statement, regex) statement |
| 18 | #define DISABLE_IN_RELEASE(Name) DISABLED_##Name |
| 19 | #endif // DEBUG |
| 20 | |
| 21 | namespace v8 { |
| 22 | namespace internal { |
| 23 | namespace compiler { |
| 24 | |
| 25 | class LiveRangeUnitTest : public TestWithZone { |
| 26 | public: |
| 27 | // Split helper, to avoid int->LifetimePosition conversion nuisance. |
| 28 | LiveRange* Split(LiveRange* range, int pos) { |
| 29 | return range->SplitAt(LifetimePosition::FromInt(pos), zone()); |
| 30 | } |
| 31 | |
| 32 | |
| 33 | TopLevelLiveRange* Splinter(TopLevelLiveRange* top, int start, int end, |
| 34 | int new_id = 0) { |
| 35 | if (top->splinter() == nullptr) { |
| 36 | TopLevelLiveRange* ret = new (zone()) |
| 37 | TopLevelLiveRange(new_id, MachineRepresentation::kTagged); |
| 38 | top->SetSplinter(ret); |
| 39 | } |
| 40 | top->Splinter(LifetimePosition::FromInt(start), |
| 41 | LifetimePosition::FromInt(end), zone()); |
| 42 | return top->splinter(); |
| 43 | } |
| 44 | |
| 45 | // Ranges first and second match structurally. |
| 46 | bool RangesMatch(LiveRange* first, LiveRange* second) { |
| 47 | if (first->Start() != second->Start() || first->End() != second->End()) { |
| 48 | return false; |
| 49 | } |
| 50 | UseInterval* i1 = first->first_interval(); |
| 51 | UseInterval* i2 = second->first_interval(); |
| 52 | |
| 53 | while (i1 != nullptr && i2 != nullptr) { |
| 54 | if (i1->start() != i2->start() || i1->end() != i2->end()) return false; |
| 55 | i1 = i1->next(); |
| 56 | i2 = i2->next(); |
| 57 | } |
| 58 | if (i1 != nullptr || i2 != nullptr) return false; |
| 59 | |
| 60 | UsePosition* p1 = first->first_pos(); |
| 61 | UsePosition* p2 = second->first_pos(); |
| 62 | |
| 63 | while (p1 != nullptr && p2 != nullptr) { |
| 64 | if (p1->pos() != p2->pos()) return false; |
| 65 | p1 = p1->next(); |
| 66 | p2 = p2->next(); |
| 67 | } |
| 68 | if (p1 != nullptr || p2 != nullptr) return false; |
| 69 | return true; |
| 70 | } |
| 71 | }; |
| 72 | |
| 73 | |
| 74 | TEST_F(LiveRangeUnitTest, InvalidConstruction) { |
| 75 | // Build a range manually, because the builder guards against empty cases. |
| 76 | TopLevelLiveRange* range = |
| 77 | new (zone()) TopLevelLiveRange(1, MachineRepresentation::kTagged); |
| 78 | V8_ASSERT_DEBUG_DEATH( |
| 79 | range->AddUseInterval(LifetimePosition::FromInt(0), |
| 80 | LifetimePosition::FromInt(0), zone()), |
| 81 | ".*"); |
| 82 | } |
| 83 | |
| 84 | |
| 85 | TEST_F(LiveRangeUnitTest, SplitInvalidStart) { |
| 86 | TopLevelLiveRange* range = TestRangeBuilder(zone()).Build(0, 1); |
| 87 | V8_ASSERT_DEBUG_DEATH(Split(range, 0), ".*"); |
| 88 | } |
| 89 | |
| 90 | |
| 91 | TEST_F(LiveRangeUnitTest, DISABLE_IN_RELEASE(InvalidSplitEnd)) { |
| 92 | TopLevelLiveRange* range = TestRangeBuilder(zone()).Build(0, 1); |
| 93 | ASSERT_DEATH_IF_SUPPORTED(Split(range, 1), ".*"); |
| 94 | } |
| 95 | |
| 96 | |
| 97 | TEST_F(LiveRangeUnitTest, DISABLE_IN_RELEASE(SplitInvalidPreStart)) { |
| 98 | TopLevelLiveRange* range = TestRangeBuilder(zone()).Build(1, 2); |
| 99 | ASSERT_DEATH_IF_SUPPORTED(Split(range, 0), ".*"); |
| 100 | } |
| 101 | |
| 102 | |
| 103 | TEST_F(LiveRangeUnitTest, DISABLE_IN_RELEASE(SplitInvalidPostEnd)) { |
| 104 | TopLevelLiveRange* range = TestRangeBuilder(zone()).Build(0, 1); |
| 105 | ASSERT_DEATH_IF_SUPPORTED(Split(range, 2), ".*"); |
| 106 | } |
| 107 | |
| 108 | |
| 109 | TEST_F(LiveRangeUnitTest, SplitSingleIntervalNoUsePositions) { |
| 110 | TopLevelLiveRange* range = TestRangeBuilder(zone()).Build(0, 2); |
| 111 | LiveRange* child = Split(range, 1); |
| 112 | |
| 113 | EXPECT_NE(nullptr, range->next()); |
| 114 | EXPECT_EQ(child, range->next()); |
| 115 | |
| 116 | LiveRange* expected_top = TestRangeBuilder(zone()).Build(0, 1); |
| 117 | LiveRange* expected_bottom = TestRangeBuilder(zone()).Build(1, 2); |
| 118 | EXPECT_TRUE(RangesMatch(expected_top, range)); |
| 119 | EXPECT_TRUE(RangesMatch(expected_bottom, child)); |
| 120 | } |
| 121 | |
| 122 | |
| 123 | TEST_F(LiveRangeUnitTest, SplitManyIntervalNoUsePositionsBetween) { |
| 124 | TopLevelLiveRange* range = |
| 125 | TestRangeBuilder(zone()).Add(0, 2).Add(4, 6).Build(); |
| 126 | LiveRange* child = Split(range, 3); |
| 127 | |
| 128 | EXPECT_NE(nullptr, range->next()); |
| 129 | EXPECT_EQ(child, range->next()); |
| 130 | |
| 131 | LiveRange* expected_top = TestRangeBuilder(zone()).Build(0, 2); |
| 132 | LiveRange* expected_bottom = TestRangeBuilder(zone()).Build(4, 6); |
| 133 | EXPECT_TRUE(RangesMatch(expected_top, range)); |
| 134 | EXPECT_TRUE(RangesMatch(expected_bottom, child)); |
| 135 | } |
| 136 | |
| 137 | |
| 138 | TEST_F(LiveRangeUnitTest, SplitManyIntervalNoUsePositionsFront) { |
| 139 | TopLevelLiveRange* range = |
| 140 | TestRangeBuilder(zone()).Add(0, 2).Add(4, 6).Build(); |
| 141 | LiveRange* child = Split(range, 1); |
| 142 | |
| 143 | EXPECT_NE(nullptr, range->next()); |
| 144 | EXPECT_EQ(child, range->next()); |
| 145 | |
| 146 | LiveRange* expected_top = TestRangeBuilder(zone()).Build(0, 1); |
| 147 | LiveRange* expected_bottom = |
| 148 | TestRangeBuilder(zone()).Add(1, 2).Add(4, 6).Build(); |
| 149 | EXPECT_TRUE(RangesMatch(expected_top, range)); |
| 150 | EXPECT_TRUE(RangesMatch(expected_bottom, child)); |
| 151 | } |
| 152 | |
| 153 | |
| 154 | TEST_F(LiveRangeUnitTest, SplitManyIntervalNoUsePositionsAfter) { |
| 155 | TopLevelLiveRange* range = |
| 156 | TestRangeBuilder(zone()).Add(0, 2).Add(4, 6).Build(); |
| 157 | LiveRange* child = Split(range, 5); |
| 158 | |
| 159 | EXPECT_NE(nullptr, range->next()); |
| 160 | EXPECT_EQ(child, range->next()); |
| 161 | |
| 162 | LiveRange* expected_top = |
| 163 | TestRangeBuilder(zone()).Add(0, 2).Add(4, 5).Build(); |
| 164 | LiveRange* expected_bottom = TestRangeBuilder(zone()).Build(5, 6); |
| 165 | EXPECT_TRUE(RangesMatch(expected_top, range)); |
| 166 | EXPECT_TRUE(RangesMatch(expected_bottom, child)); |
| 167 | } |
| 168 | |
| 169 | |
| 170 | TEST_F(LiveRangeUnitTest, SplitSingleIntervalUsePositions) { |
| 171 | TopLevelLiveRange* range = |
| 172 | TestRangeBuilder(zone()).Add(0, 3).AddUse(0).AddUse(2).Build(); |
| 173 | |
| 174 | LiveRange* child = Split(range, 1); |
| 175 | |
| 176 | EXPECT_NE(nullptr, range->next()); |
| 177 | EXPECT_EQ(child, range->next()); |
| 178 | |
| 179 | LiveRange* expected_top = |
| 180 | TestRangeBuilder(zone()).Add(0, 1).AddUse(0).Build(); |
| 181 | LiveRange* expected_bottom = |
| 182 | TestRangeBuilder(zone()).Add(1, 3).AddUse(2).Build(); |
| 183 | EXPECT_TRUE(RangesMatch(expected_top, range)); |
| 184 | EXPECT_TRUE(RangesMatch(expected_bottom, child)); |
| 185 | } |
| 186 | |
| 187 | |
| 188 | TEST_F(LiveRangeUnitTest, SplitSingleIntervalUsePositionsAtPos) { |
| 189 | TopLevelLiveRange* range = |
| 190 | TestRangeBuilder(zone()).Add(0, 3).AddUse(0).AddUse(2).Build(); |
| 191 | |
| 192 | LiveRange* child = Split(range, 2); |
| 193 | |
| 194 | EXPECT_NE(nullptr, range->next()); |
| 195 | EXPECT_EQ(child, range->next()); |
| 196 | |
| 197 | LiveRange* expected_top = |
| 198 | TestRangeBuilder(zone()).Add(0, 2).AddUse(0).AddUse(2).Build(); |
| 199 | LiveRange* expected_bottom = TestRangeBuilder(zone()).Build(2, 3); |
| 200 | EXPECT_TRUE(RangesMatch(expected_top, range)); |
| 201 | EXPECT_TRUE(RangesMatch(expected_bottom, child)); |
| 202 | } |
| 203 | |
| 204 | |
| 205 | TEST_F(LiveRangeUnitTest, SplitManyIntervalUsePositionsBetween) { |
| 206 | TopLevelLiveRange* range = |
| 207 | TestRangeBuilder(zone()).Add(0, 2).Add(4, 6).AddUse(1).AddUse(5).Build(); |
| 208 | LiveRange* child = Split(range, 3); |
| 209 | |
| 210 | EXPECT_NE(nullptr, range->next()); |
| 211 | EXPECT_EQ(child, range->next()); |
| 212 | |
| 213 | LiveRange* expected_top = |
| 214 | TestRangeBuilder(zone()).Add(0, 2).AddUse(1).Build(); |
| 215 | LiveRange* expected_bottom = |
| 216 | TestRangeBuilder(zone()).Add(4, 6).AddUse(5).Build(); |
| 217 | EXPECT_TRUE(RangesMatch(expected_top, range)); |
| 218 | EXPECT_TRUE(RangesMatch(expected_bottom, child)); |
| 219 | } |
| 220 | |
| 221 | |
| 222 | TEST_F(LiveRangeUnitTest, SplitManyIntervalUsePositionsAtInterval) { |
| 223 | TopLevelLiveRange* range = |
| 224 | TestRangeBuilder(zone()).Add(0, 2).Add(4, 6).AddUse(1).AddUse(4).Build(); |
| 225 | LiveRange* child = Split(range, 4); |
| 226 | |
| 227 | EXPECT_NE(nullptr, range->next()); |
| 228 | EXPECT_EQ(child, range->next()); |
| 229 | |
| 230 | LiveRange* expected_top = |
| 231 | TestRangeBuilder(zone()).Add(0, 2).AddUse(1).Build(); |
| 232 | LiveRange* expected_bottom = |
| 233 | TestRangeBuilder(zone()).Add(4, 6).AddUse(4).Build(); |
| 234 | EXPECT_TRUE(RangesMatch(expected_top, range)); |
| 235 | EXPECT_TRUE(RangesMatch(expected_bottom, child)); |
| 236 | } |
| 237 | |
| 238 | |
| 239 | TEST_F(LiveRangeUnitTest, SplitManyIntervalUsePositionsFront) { |
| 240 | TopLevelLiveRange* range = |
| 241 | TestRangeBuilder(zone()).Add(0, 2).Add(4, 6).AddUse(1).AddUse(5).Build(); |
| 242 | LiveRange* child = Split(range, 1); |
| 243 | |
| 244 | EXPECT_NE(nullptr, range->next()); |
| 245 | EXPECT_EQ(child, range->next()); |
| 246 | |
| 247 | LiveRange* expected_top = |
| 248 | TestRangeBuilder(zone()).Add(0, 1).AddUse(1).Build(); |
| 249 | LiveRange* expected_bottom = |
| 250 | TestRangeBuilder(zone()).Add(1, 2).Add(4, 6).AddUse(5).Build(); |
| 251 | EXPECT_TRUE(RangesMatch(expected_top, range)); |
| 252 | EXPECT_TRUE(RangesMatch(expected_bottom, child)); |
| 253 | } |
| 254 | |
| 255 | |
| 256 | TEST_F(LiveRangeUnitTest, SplitManyIntervalUsePositionsAfter) { |
| 257 | TopLevelLiveRange* range = |
| 258 | TestRangeBuilder(zone()).Add(0, 2).Add(4, 6).AddUse(1).AddUse(5).Build(); |
| 259 | LiveRange* child = Split(range, 5); |
| 260 | |
| 261 | EXPECT_NE(nullptr, range->next()); |
| 262 | EXPECT_EQ(child, range->next()); |
| 263 | |
| 264 | LiveRange* expected_top = |
| 265 | TestRangeBuilder(zone()).Add(0, 2).Add(4, 5).AddUse(1).AddUse(5).Build(); |
| 266 | LiveRange* expected_bottom = TestRangeBuilder(zone()).Build(5, 6); |
| 267 | EXPECT_TRUE(RangesMatch(expected_top, range)); |
| 268 | EXPECT_TRUE(RangesMatch(expected_bottom, child)); |
| 269 | } |
| 270 | |
| 271 | |
| 272 | TEST_F(LiveRangeUnitTest, SplinterSingleInterval) { |
| 273 | TopLevelLiveRange* range = TestRangeBuilder(zone()).Build(0, 6); |
| 274 | TopLevelLiveRange* splinter = Splinter(range, 3, 5); |
| 275 | EXPECT_EQ(nullptr, range->next()); |
| 276 | EXPECT_EQ(nullptr, splinter->next()); |
| 277 | EXPECT_EQ(range, splinter->splintered_from()); |
| 278 | |
| 279 | TopLevelLiveRange* expected_source = |
| 280 | TestRangeBuilder(zone()).Add(0, 3).Add(5, 6).Build(); |
| 281 | TopLevelLiveRange* expected_splinter = TestRangeBuilder(zone()).Build(3, 5); |
| 282 | EXPECT_TRUE(RangesMatch(expected_source, range)); |
| 283 | EXPECT_TRUE(RangesMatch(expected_splinter, splinter)); |
| 284 | } |
| 285 | |
| 286 | |
| 287 | TEST_F(LiveRangeUnitTest, MergeSingleInterval) { |
| 288 | TopLevelLiveRange* original = TestRangeBuilder(zone()).Build(0, 6); |
| 289 | TopLevelLiveRange* splinter = Splinter(original, 3, 5); |
| 290 | |
| 291 | original->Merge(splinter, zone()); |
| 292 | TopLevelLiveRange* result = TestRangeBuilder(zone()).Build(0, 6); |
| 293 | LiveRange* child_1 = Split(result, 3); |
| 294 | Split(child_1, 5); |
| 295 | |
| 296 | EXPECT_TRUE(RangesMatch(result, original)); |
| 297 | } |
| 298 | |
| 299 | |
| 300 | TEST_F(LiveRangeUnitTest, SplinterMultipleIntervalsOutside) { |
| 301 | TopLevelLiveRange* range = |
| 302 | TestRangeBuilder(zone()).Add(0, 3).Add(5, 8).Build(); |
| 303 | TopLevelLiveRange* splinter = Splinter(range, 2, 6); |
| 304 | EXPECT_EQ(nullptr, range->next()); |
| 305 | EXPECT_EQ(nullptr, splinter->next()); |
| 306 | EXPECT_EQ(range, splinter->splintered_from()); |
| 307 | |
| 308 | TopLevelLiveRange* expected_source = |
| 309 | TestRangeBuilder(zone()).Add(0, 2).Add(6, 8).Build(); |
| 310 | TopLevelLiveRange* expected_splinter = |
| 311 | TestRangeBuilder(zone()).Add(2, 3).Add(5, 6).Build(); |
| 312 | EXPECT_TRUE(RangesMatch(expected_source, range)); |
| 313 | EXPECT_TRUE(RangesMatch(expected_splinter, splinter)); |
| 314 | } |
| 315 | |
| 316 | |
| 317 | TEST_F(LiveRangeUnitTest, MergeMultipleIntervalsOutside) { |
| 318 | TopLevelLiveRange* original = |
| 319 | TestRangeBuilder(zone()).Add(0, 3).Add(5, 8).Build(); |
| 320 | TopLevelLiveRange* splinter = Splinter(original, 2, 6); |
| 321 | original->Merge(splinter, zone()); |
| 322 | |
| 323 | TopLevelLiveRange* result = |
| 324 | TestRangeBuilder(zone()).Add(0, 3).Add(5, 8).Build(); |
| 325 | LiveRange* child_1 = Split(result, 2); |
| 326 | Split(child_1, 6); |
| 327 | EXPECT_TRUE(RangesMatch(result, original)); |
| 328 | } |
| 329 | |
| 330 | |
| 331 | TEST_F(LiveRangeUnitTest, SplinterMultipleIntervalsInside) { |
| 332 | TopLevelLiveRange* range = |
| 333 | TestRangeBuilder(zone()).Add(0, 3).Add(5, 8).Build(); |
| 334 | V8_ASSERT_DEBUG_DEATH(Splinter(range, 3, 5), ".*"); |
| 335 | } |
| 336 | |
| 337 | |
| 338 | TEST_F(LiveRangeUnitTest, SplinterMultipleIntervalsLeft) { |
| 339 | TopLevelLiveRange* range = |
| 340 | TestRangeBuilder(zone()).Add(0, 3).Add(5, 8).Build(); |
| 341 | TopLevelLiveRange* splinter = Splinter(range, 2, 4); |
| 342 | EXPECT_EQ(nullptr, range->next()); |
| 343 | EXPECT_EQ(nullptr, splinter->next()); |
| 344 | EXPECT_EQ(range, splinter->splintered_from()); |
| 345 | |
| 346 | TopLevelLiveRange* expected_source = |
| 347 | TestRangeBuilder(zone()).Add(0, 2).Add(5, 8).Build(); |
| 348 | TopLevelLiveRange* expected_splinter = TestRangeBuilder(zone()).Build(2, 3); |
| 349 | EXPECT_TRUE(RangesMatch(expected_source, range)); |
| 350 | EXPECT_TRUE(RangesMatch(expected_splinter, splinter)); |
| 351 | } |
| 352 | |
| 353 | |
| 354 | TEST_F(LiveRangeUnitTest, MergeMultipleIntervalsLeft) { |
| 355 | TopLevelLiveRange* original = |
| 356 | TestRangeBuilder(zone()).Add(0, 3).Add(5, 8).Build(); |
| 357 | TopLevelLiveRange* splinter = Splinter(original, 2, 4); |
| 358 | original->Merge(splinter, zone()); |
| 359 | |
| 360 | TopLevelLiveRange* result = |
| 361 | TestRangeBuilder(zone()).Add(0, 3).Add(5, 8).Build(); |
| 362 | Split(result, 2); |
| 363 | EXPECT_TRUE(RangesMatch(result, original)); |
| 364 | } |
| 365 | |
| 366 | |
| 367 | TEST_F(LiveRangeUnitTest, SplinterMultipleIntervalsRight) { |
| 368 | TopLevelLiveRange* range = |
| 369 | TestRangeBuilder(zone()).Add(0, 3).Add(5, 8).Build(); |
| 370 | TopLevelLiveRange* splinter = Splinter(range, 4, 6); |
| 371 | EXPECT_EQ(nullptr, range->next()); |
| 372 | EXPECT_EQ(nullptr, splinter->next()); |
| 373 | EXPECT_EQ(range, splinter->splintered_from()); |
| 374 | |
| 375 | TopLevelLiveRange* expected_source = |
| 376 | TestRangeBuilder(zone()).Add(0, 3).Add(6, 8).Build(); |
| 377 | TopLevelLiveRange* expected_splinter = TestRangeBuilder(zone()).Build(5, 6); |
| 378 | EXPECT_TRUE(RangesMatch(expected_source, range)); |
| 379 | EXPECT_TRUE(RangesMatch(expected_splinter, splinter)); |
| 380 | } |
| 381 | |
| 382 | |
| 383 | TEST_F(LiveRangeUnitTest, SplinterMergeMultipleTimes) { |
| 384 | TopLevelLiveRange* range = |
| 385 | TestRangeBuilder(zone()).Add(0, 3).Add(5, 10).Add(12, 16).Build(); |
| 386 | Splinter(range, 4, 6); |
| 387 | Splinter(range, 8, 14); |
| 388 | TopLevelLiveRange* splinter = range->splinter(); |
| 389 | EXPECT_EQ(nullptr, range->next()); |
| 390 | EXPECT_EQ(nullptr, splinter->next()); |
| 391 | EXPECT_EQ(range, splinter->splintered_from()); |
| 392 | |
| 393 | TopLevelLiveRange* expected_source = |
| 394 | TestRangeBuilder(zone()).Add(0, 3).Add(6, 8).Add(14, 16).Build(); |
| 395 | TopLevelLiveRange* expected_splinter = |
| 396 | TestRangeBuilder(zone()).Add(5, 6).Add(8, 10).Add(12, 14).Build(); |
| 397 | EXPECT_TRUE(RangesMatch(expected_source, range)); |
| 398 | EXPECT_TRUE(RangesMatch(expected_splinter, splinter)); |
| 399 | } |
| 400 | |
| 401 | |
| 402 | TEST_F(LiveRangeUnitTest, MergeMultipleIntervalsRight) { |
| 403 | TopLevelLiveRange* original = |
| 404 | TestRangeBuilder(zone()).Add(0, 3).Add(5, 8).Build(); |
| 405 | TopLevelLiveRange* splinter = Splinter(original, 4, 6); |
| 406 | original->Merge(splinter, zone()); |
| 407 | |
| 408 | TopLevelLiveRange* result = |
| 409 | TestRangeBuilder(zone()).Add(0, 3).Add(5, 8).Build(); |
| 410 | LiveRange* child_1 = Split(result, 5); |
| 411 | Split(child_1, 6); |
| 412 | |
| 413 | EXPECT_TRUE(RangesMatch(result, original)); |
| 414 | } |
| 415 | |
| 416 | |
| 417 | TEST_F(LiveRangeUnitTest, MergeAfterSplitting) { |
| 418 | TopLevelLiveRange* original = TestRangeBuilder(zone()).Build(0, 8); |
| 419 | TopLevelLiveRange* splinter = Splinter(original, 4, 6); |
| 420 | LiveRange* original_child = Split(original, 2); |
| 421 | Split(original_child, 7); |
| 422 | original->Merge(splinter, zone()); |
| 423 | |
| 424 | TopLevelLiveRange* result = TestRangeBuilder(zone()).Build(0, 8); |
| 425 | LiveRange* child_1 = Split(result, 2); |
| 426 | LiveRange* child_2 = Split(child_1, 4); |
| 427 | LiveRange* child_3 = Split(child_2, 6); |
| 428 | Split(child_3, 7); |
| 429 | |
| 430 | EXPECT_TRUE(RangesMatch(result, original)); |
| 431 | } |
| 432 | |
| 433 | |
| 434 | TEST_F(LiveRangeUnitTest, IDGeneration) { |
| 435 | TopLevelLiveRange* vreg = TestRangeBuilder(zone()).Id(2).Build(0, 100); |
| 436 | EXPECT_EQ(2, vreg->vreg()); |
| 437 | EXPECT_EQ(0, vreg->relative_id()); |
| 438 | |
| 439 | TopLevelLiveRange* splinter = |
| 440 | new (zone()) TopLevelLiveRange(101, MachineRepresentation::kTagged); |
| 441 | vreg->SetSplinter(splinter); |
| 442 | vreg->Splinter(LifetimePosition::FromInt(4), LifetimePosition::FromInt(12), |
| 443 | zone()); |
| 444 | |
| 445 | EXPECT_EQ(101, splinter->vreg()); |
| 446 | EXPECT_EQ(1, splinter->relative_id()); |
| 447 | |
| 448 | LiveRange* child = vreg->SplitAt(LifetimePosition::FromInt(50), zone()); |
| 449 | |
| 450 | EXPECT_EQ(2, child->relative_id()); |
| 451 | |
| 452 | LiveRange* splinter_child = |
| 453 | splinter->SplitAt(LifetimePosition::FromInt(8), zone()); |
| 454 | |
| 455 | EXPECT_EQ(1, splinter->relative_id()); |
| 456 | EXPECT_EQ(3, splinter_child->relative_id()); |
| 457 | |
| 458 | vreg->Merge(splinter, zone()); |
| 459 | EXPECT_EQ(1, splinter->relative_id()); |
| 460 | } |
| 461 | |
| 462 | } // namespace compiler |
| 463 | } // namespace internal |
| 464 | } // namespace v8 |