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| 1 // Copyright 2016 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 // Flags: --allow-natives-syntax --harmony-explicit-tailcalls | |
| 6 // Flags: --harmony-do-expressions | |
| 7 | |
| 8 "use strict"; | |
| 9 | |
| 10 Error.prepareStackTrace = (error,stack) => { | |
| 11 error.strace = stack; | |
| 12 return error.message + "\n at " + stack.join("\n at "); | |
| 13 } | |
| 14 | |
| 15 | |
| 16 function CheckStackTrace(expected) { | |
| 17 var e = new Error(); | |
| 18 e.stack; // prepare stack trace | |
| 19 var stack = e.strace; | |
| 20 assertEquals("CheckStackTrace", stack[0].getFunctionName()); | |
| 21 for (var i = 0; i < expected.length; i++) { | |
| 22 assertEquals(expected[i].name, stack[i + 1].getFunctionName()); | |
| 23 } | |
| 24 } | |
| 25 %NeverOptimizeFunction(CheckStackTrace); | |
| 26 | |
| 27 | |
| 28 function f(expected_call_stack, a, b) { | |
| 29 CheckStackTrace(expected_call_stack); | |
| 30 return a; | |
| 31 } | |
| 32 | |
| 33 function f_153(expected_call_stack, a) { | |
| 34 CheckStackTrace(expected_call_stack); | |
| 35 return 153; | |
| 36 } | |
| 37 | |
| 38 | |
| 39 // Tail call when caller does not have an arguments adaptor frame. | |
| 40 (function() { | |
| 41 // Caller and callee have same number of arguments. | |
| 42 function f1(a) { | |
| 43 CheckStackTrace([f1, test]); | |
| 44 return 10 + a; | |
| 45 } | |
| 46 function g1(a) { return continue f1(2); } | |
| 47 | |
| 48 // Caller has more arguments than callee. | |
| 49 function f2(a) { | |
| 50 CheckStackTrace([f2, test]); | |
| 51 return 10 + a; | |
| 52 } | |
| 53 function g2(a, b, c) { return continue f2(2); } | |
| 54 | |
| 55 // Caller has less arguments than callee. | |
| 56 function f3(a, b, c) { | |
| 57 CheckStackTrace([f3, test]); | |
| 58 return 10 + a + b + c; | |
| 59 } | |
| 60 function g3(a) { return continue f3(2, 3, 4); } | |
| 61 | |
| 62 // Callee has arguments adaptor frame. | |
| 63 function f4(a, b, c) { | |
| 64 CheckStackTrace([f4, test]); | |
| 65 return 10 + a; | |
| 66 } | |
| 67 function g4(a) { return continue f4(2); } | |
| 68 | |
| 69 function test() { | |
| 70 assertEquals(12, g1(1)); | |
| 71 assertEquals(12, g2(1, 2, 3)); | |
| 72 assertEquals(19, g3(1)); | |
| 73 assertEquals(12, g4(1)); | |
| 74 } | |
| 75 test(); | |
| 76 test(); | |
| 77 %OptimizeFunctionOnNextCall(test); | |
| 78 test(); | |
| 79 })(); | |
| 80 | |
| 81 | |
| 82 // Tail call when caller has an arguments adaptor frame. | |
| 83 (function() { | |
| 84 // Caller and callee have same number of arguments. | |
| 85 function f1(a) { | |
| 86 CheckStackTrace([f1, test]); | |
| 87 return 10 + a; | |
| 88 } | |
| 89 function g1(a) { return continue f1(2); } | |
| 90 | |
| 91 // Caller has more arguments than callee. | |
| 92 function f2(a) { | |
| 93 CheckStackTrace([f2, test]); | |
| 94 return 10 + a; | |
| 95 } | |
| 96 function g2(a, b, c) { return continue f2(2); } | |
| 97 | |
| 98 // Caller has less arguments than callee. | |
| 99 function f3(a, b, c) { | |
| 100 CheckStackTrace([f3, test]); | |
| 101 return 10 + a + b + c; | |
| 102 } | |
| 103 function g3(a) { return continue f3(2, 3, 4); } | |
| 104 | |
| 105 // Callee has arguments adaptor frame. | |
| 106 function f4(a, b, c) { | |
| 107 CheckStackTrace([f4, test]); | |
| 108 return 10 + a; | |
| 109 } | |
| 110 function g4(a) { return continue f4(2); } | |
| 111 | |
| 112 function test() { | |
| 113 assertEquals(12, g1()); | |
| 114 assertEquals(12, g2()); | |
| 115 assertEquals(19, g3()); | |
| 116 assertEquals(12, g4()); | |
| 117 } | |
| 118 test(); | |
| 119 test(); | |
| 120 %OptimizeFunctionOnNextCall(test); | |
| 121 test(); | |
| 122 })(); | |
| 123 | |
| 124 | |
| 125 // Tail call bound function when caller does not have an arguments | |
| 126 // adaptor frame. | |
| 127 (function() { | |
| 128 // Caller and callee have same number of arguments. | |
| 129 function f1(a) { | |
| 130 assertEquals(153, this.a); | |
| 131 CheckStackTrace([f1, test]); | |
| 132 return 10 + a; | |
| 133 } | |
| 134 var b1 = f1.bind({a: 153}); | |
| 135 function g1(a) { return continue b1(2); } | |
| 136 | |
| 137 // Caller has more arguments than callee. | |
| 138 function f2(a) { | |
| 139 assertEquals(153, this.a); | |
| 140 CheckStackTrace([f2, test]); | |
| 141 return 10 + a; | |
| 142 } | |
| 143 var b2 = f2.bind({a: 153}); | |
| 144 function g2(a, b, c) { return continue b2(2); } | |
| 145 | |
| 146 // Caller has less arguments than callee. | |
| 147 function f3(a, b, c) { | |
| 148 assertEquals(153, this.a); | |
| 149 CheckStackTrace([f3, test]); | |
| 150 return 10 + a + b + c; | |
| 151 } | |
| 152 var b3 = f3.bind({a: 153}); | |
| 153 function g3(a) { return continue b3(2, 3, 4); } | |
| 154 | |
| 155 // Callee has arguments adaptor frame. | |
| 156 function f4(a, b, c) { | |
| 157 assertEquals(153, this.a); | |
| 158 CheckStackTrace([f4, test]); | |
| 159 return 10 + a; | |
| 160 } | |
| 161 var b4 = f4.bind({a: 153}); | |
| 162 function g4(a) { return continue b4(2); } | |
| 163 | |
| 164 function test() { | |
| 165 assertEquals(12, g1(1)); | |
| 166 assertEquals(12, g2(1, 2, 3)); | |
| 167 assertEquals(19, g3(1)); | |
| 168 assertEquals(12, g4(1)); | |
| 169 } | |
| 170 test(); | |
| 171 test(); | |
| 172 %OptimizeFunctionOnNextCall(test); | |
| 173 test(); | |
| 174 })(); | |
| 175 | |
| 176 | |
| 177 // Tail call bound function when caller has an arguments adaptor frame. | |
| 178 (function() { | |
| 179 // Caller and callee have same number of arguments. | |
| 180 function f1(a) { | |
| 181 assertEquals(153, this.a); | |
| 182 CheckStackTrace([f1, test]); | |
| 183 return 10 + a; | |
| 184 } | |
| 185 var b1 = f1.bind({a: 153}); | |
| 186 function g1(a) { return continue b1(2); } | |
| 187 | |
| 188 // Caller has more arguments than callee. | |
| 189 function f2(a) { | |
| 190 assertEquals(153, this.a); | |
| 191 CheckStackTrace([f2, test]); | |
| 192 return 10 + a; | |
| 193 } | |
| 194 var b2 = f2.bind({a: 153}); | |
| 195 function g2(a, b, c) { return continue b2(2); } | |
| 196 | |
| 197 // Caller has less arguments than callee. | |
| 198 function f3(a, b, c) { | |
| 199 assertEquals(153, this.a); | |
| 200 CheckStackTrace([f3, test]); | |
| 201 return 10 + a + b + c; | |
| 202 } | |
| 203 var b3 = f3.bind({a: 153}); | |
| 204 function g3(a) { return continue b3(2, 3, 4); } | |
| 205 | |
| 206 // Callee has arguments adaptor frame. | |
| 207 function f4(a, b, c) { | |
| 208 assertEquals(153, this.a); | |
| 209 CheckStackTrace([f4, test]); | |
| 210 return 10 + a; | |
| 211 } | |
| 212 var b4 = f4.bind({a: 153}); | |
| 213 function g4(a) { return continue b4(2); } | |
| 214 | |
| 215 function test() { | |
| 216 assertEquals(12, g1()); | |
| 217 assertEquals(12, g2()); | |
| 218 assertEquals(19, g3()); | |
| 219 assertEquals(12, g4()); | |
| 220 } | |
| 221 test(); | |
| 222 test(); | |
| 223 %OptimizeFunctionOnNextCall(test); | |
| 224 test(); | |
| 225 })(); | |
| 226 | |
| 227 | |
| 228 // Tail calling from getter. | |
| 229 (function() { | |
| 230 function g(v) { | |
| 231 CheckStackTrace([g, test]); | |
| 232 %DeoptimizeFunction(test); | |
| 233 return 153; | |
| 234 } | |
| 235 %NeverOptimizeFunction(g); | |
| 236 | |
| 237 function f(v) { | |
| 238 return continue g(); | |
| 239 } | |
| 240 %SetForceInlineFlag(f); | |
| 241 | |
| 242 function test() { | |
| 243 var o = {}; | |
| 244 o.__defineGetter__('p', f); | |
| 245 assertEquals(153, o.p); | |
| 246 } | |
| 247 | |
| 248 test(); | |
| 249 test(); | |
| 250 %OptimizeFunctionOnNextCall(test); | |
| 251 test(); | |
| 252 })(); | |
| 253 | |
| 254 | |
| 255 // Tail calling from setter. | |
| 256 (function() { | |
| 257 function g() { | |
| 258 CheckStackTrace([g, test]); | |
| 259 %DeoptimizeFunction(test); | |
| 260 return 153; | |
| 261 } | |
| 262 %NeverOptimizeFunction(g); | |
| 263 | |
| 264 function f(v) { | |
| 265 return continue g(); | |
| 266 } | |
| 267 %SetForceInlineFlag(f); | |
| 268 | |
| 269 function test() { | |
| 270 var o = {}; | |
| 271 o.__defineSetter__('q', f); | |
| 272 assertEquals(1, o.q = 1); | |
| 273 } | |
| 274 | |
| 275 test(); | |
| 276 test(); | |
| 277 %OptimizeFunctionOnNextCall(test); | |
| 278 test(); | |
| 279 })(); | |
| 280 | |
| 281 | |
| 282 // Tail calling from constructor. | |
| 283 (function() { | |
| 284 function g(context) { | |
| 285 CheckStackTrace([g, test]); | |
| 286 %DeoptimizeFunction(test); | |
| 287 return {x: 153}; | |
| 288 } | |
| 289 %NeverOptimizeFunction(g); | |
| 290 | |
| 291 function A() { | |
| 292 this.x = 42; | |
| 293 return continue g(); | |
| 294 } | |
| 295 | |
| 296 function test() { | |
| 297 var o = new A(); | |
| 298 %DebugPrint(o); | |
| 299 assertEquals(153, o.x); | |
| 300 } | |
| 301 | |
| 302 test(); | |
| 303 test(); | |
| 304 %OptimizeFunctionOnNextCall(test); | |
| 305 test(); | |
| 306 })(); | |
| 307 | |
| 308 | |
| 309 // Tail calling via various expressions. | |
| 310 (function() { | |
| 311 function g1(a) { | |
| 312 return f([f, g1, test], false) || continue f([f, test], true); | |
| 313 } | |
| 314 | |
| 315 function g2(a) { | |
| 316 return f([f, g2, test], true) && continue f([f, test], true); | |
| 317 } | |
| 318 | |
| 319 function g3(a) { | |
| 320 return f([f, g3, test], 13), continue f([f, test], 153); | |
| 321 } | |
| 322 | |
| 323 function g4(a) { | |
| 324 return f([f, g4, test], false) || | |
| 325 (f([f, g4, test], true) && continue f([f, test], true)); | |
| 326 } | |
| 327 | |
| 328 function g5(a) { | |
| 329 return f([f, g5, test], true) && | |
| 330 (f([f, g5, test], false) || continue f([f, test], true)); | |
| 331 } | |
| 332 | |
| 333 function g6(a) { | |
| 334 return f([f, g6, test], 13), f([f, g6, test], 42), | |
| 335 continue f([f, test], 153); | |
| 336 } | |
| 337 | |
| 338 function g7(a) { | |
| 339 return f([f, g7, test], false) || | |
| 340 (f([f, g7, test], false) ? continue f([f, test], true) | |
| 341 : continue f([f, test], true)); | |
| 342 } | |
| 343 | |
| 344 function g8(a) { | |
| 345 return f([f, g8, test], false) || f([f, g8, test], true) && | |
| 346 continue f([f, test], true); | |
| 347 } | |
| 348 | |
| 349 function g9(a) { | |
| 350 return f([f, g9, test], true) && f([f, g9, test], false) || | |
| 351 continue f([f, test], true); | |
| 352 } | |
| 353 | |
| 354 function g10(a) { | |
| 355 return f([f, g10, test], true) && f([f, g10, test], false) || | |
| 356 f([f, g10, test], true) ? | |
| 357 f([f, g10, test], true) && f([f, g10, test], false) || | |
| 358 continue f([f, test], true) : | |
| 359 f([f, g10, test], true) && f([f, g10, test], false) || | |
| 360 continue f([f, test], true); | |
| 361 } | |
| 362 | |
| 363 function test() { | |
| 364 assertEquals(true, g1()); | |
| 365 assertEquals(true, g2()); | |
| 366 assertEquals(153, g3()); | |
| 367 assertEquals(true, g4()); | |
| 368 assertEquals(true, g5()); | |
| 369 assertEquals(153, g6()); | |
| 370 assertEquals(true, g7()); | |
| 371 assertEquals(true, g8()); | |
| 372 assertEquals(true, g9()); | |
| 373 assertEquals(true, g10()); | |
| 374 } | |
| 375 test(); | |
| 376 test(); | |
| 377 %OptimizeFunctionOnNextCall(test); | |
| 378 test(); | |
| 379 })(); | |
| 380 | |
| 381 | |
| 382 // Tail calling from various statements. | |
| 383 (function() { | |
| 384 function g3() { | |
| 385 for (var i = 0; i < 10; i++) { | |
| 386 return continue f_153([f_153, test]); | |
| 387 } | |
| 388 } | |
| 389 | |
| 390 function g4() { | |
| 391 while (true) { | |
| 392 return continue f_153([f_153, test]); | |
| 393 } | |
| 394 } | |
| 395 | |
| 396 function g5() { | |
| 397 do { | |
| 398 return continue f_153([f_153, test]); | |
| 399 } while (true); | |
| 400 } | |
| 401 | |
| 402 function test() { | |
| 403 assertEquals(153, g3()); | |
| 404 assertEquals(153, g4()); | |
| 405 assertEquals(153, g5()); | |
| 406 } | |
| 407 test(); | |
| 408 test(); | |
| 409 %OptimizeFunctionOnNextCall(test); | |
| 410 test(); | |
| 411 })(); | |
| 412 | |
| 413 | |
| 414 // Test tail calls from try-catch constructs. | |
| 415 (function() { | |
| 416 function tc1(a) { | |
| 417 try { | |
| 418 f_153([f_153, tc1, test]); | |
| 419 return f_153([f_153, tc1, test]); | |
| 420 } catch(e) { | |
| 421 f_153([f_153, tc1, test]); | |
| 422 } | |
| 423 } | |
| 424 | |
| 425 function tc2(a) { | |
| 426 try { | |
| 427 f_153([f_153, tc2, test]); | |
| 428 throw new Error("boom"); | |
| 429 } catch(e) { | |
| 430 f_153([f_153, tc2, test]); | |
| 431 return continue f_153([f_153, test]); | |
| 432 } | |
| 433 } | |
| 434 | |
| 435 function tc3(a) { | |
| 436 try { | |
| 437 f_153([f_153, tc3, test]); | |
| 438 throw new Error("boom"); | |
| 439 } catch(e) { | |
| 440 f_153([f_153, tc3, test]); | |
| 441 } | |
| 442 f_153([f_153, tc3, test]); | |
| 443 return continue f_153([f_153, test]); | |
| 444 } | |
| 445 | |
| 446 function test() { | |
| 447 assertEquals(153, tc1()); | |
| 448 assertEquals(153, tc2()); | |
| 449 assertEquals(153, tc3()); | |
| 450 } | |
| 451 test(); | |
| 452 test(); | |
| 453 %OptimizeFunctionOnNextCall(test); | |
| 454 test(); | |
| 455 })(); | |
| 456 | |
| 457 | |
| 458 // Test tail calls from try-finally constructs. | |
| 459 (function() { | |
| 460 function tf1(a) { | |
| 461 try { | |
| 462 f_153([f_153, tf1, test]); | |
| 463 return f_153([f_153, tf1, test]); | |
| 464 } finally { | |
| 465 f_153([f_153, tf1, test]); | |
| 466 } | |
| 467 } | |
| 468 | |
| 469 function tf2(a) { | |
| 470 try { | |
| 471 f_153([f_153, tf2, test]); | |
| 472 throw new Error("boom"); | |
| 473 } finally { | |
| 474 f_153([f_153, tf2, test]); | |
| 475 return continue f_153([f_153, test]); | |
| 476 } | |
| 477 } | |
| 478 | |
| 479 function tf3(a) { | |
| 480 try { | |
| 481 f_153([f_153, tf3, test]); | |
| 482 } finally { | |
| 483 f_153([f_153, tf3, test]); | |
| 484 } | |
| 485 return continue f_153([f_153, test]); | |
| 486 } | |
| 487 | |
| 488 function test() { | |
| 489 assertEquals(153, tf1()); | |
| 490 assertEquals(153, tf2()); | |
| 491 assertEquals(153, tf3()); | |
| 492 } | |
| 493 test(); | |
| 494 test(); | |
| 495 %OptimizeFunctionOnNextCall(test); | |
| 496 test(); | |
| 497 })(); | |
| 498 | |
| 499 | |
| 500 // Test tail calls from try-catch-finally constructs. | |
| 501 (function() { | |
| 502 function tcf1(a) { | |
| 503 try { | |
| 504 f_153([f_153, tcf1, test]); | |
| 505 return f_153([f_153, tcf1, test]); | |
| 506 } catch(e) { | |
| 507 } finally { | |
| 508 f_153([f_153, tcf1, test]); | |
| 509 } | |
| 510 } | |
| 511 | |
| 512 function tcf2(a) { | |
| 513 try { | |
| 514 f_153([f_153, tcf2, test]); | |
| 515 throw new Error("boom"); | |
| 516 } catch(e) { | |
| 517 f_153([f_153, tcf2, test]); | |
| 518 return f_153([f_153, tcf2, test]); | |
| 519 } finally { | |
| 520 f_153([f_153, tcf2, test]); | |
| 521 } | |
| 522 } | |
| 523 | |
| 524 function tcf3(a) { | |
| 525 try { | |
| 526 f_153([f_153, tcf3, test]); | |
| 527 throw new Error("boom"); | |
| 528 } catch(e) { | |
| 529 f_153([f_153, tcf3, test]); | |
| 530 } finally { | |
| 531 f_153([f_153, tcf3, test]); | |
| 532 return continue f_153([f_153, test]); | |
| 533 } | |
| 534 } | |
| 535 | |
| 536 function tcf4(a) { | |
| 537 try { | |
| 538 f_153([f_153, tcf4, test]); | |
| 539 throw new Error("boom"); | |
| 540 } catch(e) { | |
| 541 f_153([f_153, tcf4, test]); | |
| 542 } finally { | |
| 543 f_153([f_153, tcf4, test]); | |
| 544 } | |
| 545 return continue f_153([f_153, test]); | |
| 546 } | |
| 547 | |
| 548 function test() { | |
| 549 assertEquals(153, tcf1()); | |
| 550 assertEquals(153, tcf2()); | |
| 551 assertEquals(153, tcf3()); | |
| 552 assertEquals(153, tcf4()); | |
| 553 } | |
| 554 test(); | |
| 555 test(); | |
| 556 %OptimizeFunctionOnNextCall(test); | |
| 557 test(); | |
| 558 })(); | |
| 559 | |
| 560 | |
| 561 // Test tail calls from arrow functions. | |
| 562 (function () { | |
| 563 function g1(a) { | |
| 564 return continue (() => { return continue f_153([f_153, test]); })(); | |
| 565 } | |
| 566 | |
| 567 function g2(a) { | |
| 568 return continue (() => continue f_153([f_153, test]))(); | |
| 569 } | |
| 570 | |
| 571 function g3(a) { | |
| 572 var closure = () => f([f, closure, test], true) | |
| 573 ? continue f_153([f_153, test]) | |
| 574 : continue f_153([f_153, test]); | |
| 575 return continue closure(); | |
| 576 } | |
| 577 | |
| 578 function test() { | |
| 579 assertEquals(153, g1()); | |
| 580 assertEquals(153, g2()); | |
| 581 assertEquals(153, g3()); | |
| 582 } | |
| 583 test(); | |
| 584 test(); | |
| 585 %OptimizeFunctionOnNextCall(test); | |
| 586 test(); | |
| 587 })(); | |
| 588 | |
| 589 | |
| 590 // Test tail calls from do expressions. | |
| 591 (function () { | |
| 592 function g1(a) { | |
| 593 var a = do { return continue f_153([f_153, test]); 42; }; | |
| 594 return a; | |
| 595 } | |
| 596 | |
| 597 function test() { | |
| 598 assertEquals(153, g1()); | |
| 599 } | |
| 600 test(); | |
| 601 test(); | |
| 602 %OptimizeFunctionOnNextCall(test); | |
| 603 test(); | |
| 604 })(); | |
| OLD | NEW |
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Chromium Code Reviews
Issue 2372513003:
[es8] Remove syntactic tail calls support. (Closed)
