1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include "bootstrapper.h"
31 #include "code-stubs.h"
32 #include "cpu-profiler.h"
33 #include "stub-cache.h"
36 #include "macro-assembler.h"
42 CodeStubInterfaceDescriptor::CodeStubInterfaceDescriptor()
43 : register_param_count_(-1),
44 stack_parameter_count_(no_reg),
45 hint_stack_parameter_count_(-1),
46 function_mode_(NOT_JS_FUNCTION_STUB_MODE),
47 register_params_(NULL),
48 deoptimization_handler_(NULL),
50 has_miss_handler_(false) { }
53 bool CodeStub::FindCodeInCache(Code** code_out, Isolate* isolate) {
54 UnseededNumberDictionary* stubs = isolate->heap()->code_stubs();
55 int index = stubs->FindEntry(GetKey());
56 if (index != UnseededNumberDictionary::kNotFound) {
57 *code_out = Code::cast(stubs->ValueAt(index));
64 SmartArrayPointer<const char> CodeStub::GetName() {
66 NoAllocationStringAllocator allocator(buffer,
67 static_cast<unsigned>(sizeof(buffer)));
68 StringStream stream(&allocator);
70 return stream.ToCString();
74 void CodeStub::RecordCodeGeneration(Code* code, Isolate* isolate) {
75 SmartArrayPointer<const char> name = GetName();
76 PROFILE(isolate, CodeCreateEvent(Logger::STUB_TAG, code, *name));
77 GDBJIT(AddCode(GDBJITInterface::STUB, *name, code));
78 Counters* counters = isolate->counters();
79 counters->total_stubs_code_size()->Increment(code->instruction_size());
83 Code::Kind CodeStub::GetCodeKind() const {
88 Handle<Code> CodeStub::GetCodeCopyFromTemplate(Isolate* isolate) {
89 Handle<Code> ic = GetCode(isolate);
90 ic = isolate->factory()->CopyCode(ic);
91 RecordCodeGeneration(*ic, isolate);
96 Handle<Code> PlatformCodeStub::GenerateCode(Isolate* isolate) {
97 Factory* factory = isolate->factory();
99 // Generate the new code.
100 MacroAssembler masm(isolate, NULL, 256);
103 // Update the static counter each time a new code stub is generated.
104 isolate->counters()->code_stubs()->Increment();
106 // Nested stubs are not allowed for leaves.
107 AllowStubCallsScope allow_scope(&masm, false);
109 // Generate the code for the stub.
110 masm.set_generating_stub(true);
111 NoCurrentFrameScope scope(&masm);
115 // Create the code object.
119 // Copy the generated code into a heap object.
120 Code::Flags flags = Code::ComputeFlags(
126 Handle<Code> new_object = factory->NewCode(
127 desc, flags, masm.CodeObject(), NeedsImmovableCode());
132 void CodeStub::VerifyPlatformFeatures(Isolate* isolate) {
133 ASSERT(CpuFeatures::VerifyCrossCompiling());
137 Handle<Code> CodeStub::GetCode(Isolate* isolate) {
138 Factory* factory = isolate->factory();
139 Heap* heap = isolate->heap();
141 if (UseSpecialCache()
142 ? FindCodeInSpecialCache(&code, isolate)
143 : FindCodeInCache(&code, isolate)) {
144 ASSERT(IsPregenerated(isolate) == code->is_pregenerated());
145 ASSERT(GetCodeKind() == code->kind());
146 return Handle<Code>(code);
150 VerifyPlatformFeatures(isolate);
154 HandleScope scope(isolate);
156 Handle<Code> new_object = GenerateCode(isolate);
157 new_object->set_major_key(MajorKey());
158 FinishCode(new_object);
159 RecordCodeGeneration(*new_object, isolate);
161 #ifdef ENABLE_DISASSEMBLER
162 if (FLAG_print_code_stubs) {
163 new_object->Disassemble(*GetName());
168 if (UseSpecialCache()) {
169 AddToSpecialCache(new_object);
171 // Update the dictionary and the root in Heap.
172 Handle<UnseededNumberDictionary> dict =
173 factory->DictionaryAtNumberPut(
174 Handle<UnseededNumberDictionary>(heap->code_stubs()),
177 heap->public_set_code_stubs(*dict);
183 ASSERT(!NeedsImmovableCode() ||
184 heap->lo_space()->Contains(code) ||
185 heap->code_space()->FirstPage()->Contains(code->address()));
186 return Handle<Code>(code, isolate);
190 const char* CodeStub::MajorName(CodeStub::Major major_key,
191 bool allow_unknown_keys) {
193 #define DEF_CASE(name) case name: return #name "Stub";
194 CODE_STUB_LIST(DEF_CASE)
197 if (!allow_unknown_keys) {
205 void CodeStub::PrintBaseName(StringStream* stream) {
206 stream->Add("%s", MajorName(MajorKey(), false));
210 void CodeStub::PrintName(StringStream* stream) {
211 PrintBaseName(stream);
216 void BinaryOpStub::PrintBaseName(StringStream* stream) {
217 const char* op_name = Token::Name(op_);
218 const char* ovr = "";
219 if (mode_ == OVERWRITE_LEFT) ovr = "_ReuseLeft";
220 if (mode_ == OVERWRITE_RIGHT) ovr = "_ReuseRight";
221 stream->Add("BinaryOpStub_%s%s", op_name, ovr);
225 void BinaryOpStub::PrintState(StringStream* stream) {
227 stream->Add(StateToName(left_state_));
229 if (fixed_right_arg_.has_value) {
230 stream->Add("%d", fixed_right_arg_.value);
232 stream->Add(StateToName(right_state_));
235 stream->Add(StateToName(result_state_));
240 Maybe<Handle<Object> > BinaryOpStub::Result(Handle<Object> left,
241 Handle<Object> right,
243 Handle<JSBuiltinsObject> builtins(isolate->js_builtins_object());
244 Builtins::JavaScript func = BinaryOpIC::TokenToJSBuiltin(op_);
245 Object* builtin = builtins->javascript_builtin(func);
246 Handle<JSFunction> builtin_function =
247 Handle<JSFunction>(JSFunction::cast(builtin), isolate);
248 bool caught_exception;
249 Handle<Object> result = Execution::Call(isolate, builtin_function, left,
250 1, &right, &caught_exception);
251 return Maybe<Handle<Object> >(!caught_exception, result);
255 void BinaryOpStub::Initialize() {
256 fixed_right_arg_.has_value = false;
257 left_state_ = right_state_ = result_state_ = NONE;
261 void BinaryOpStub::Generate(Token::Value op,
267 BinaryOpStub stub(INITIALIZED);
269 stub.left_state_ = left;
270 stub.right_state_ = right;
271 stub.result_state_ = result;
273 stub.GetCode(isolate);
277 void BinaryOpStub::Generate(Token::Value op,
283 BinaryOpStub stub(INITIALIZED);
285 stub.left_state_ = left;
286 stub.fixed_right_arg_.has_value = true;
287 stub.fixed_right_arg_.value = right;
288 stub.right_state_ = SMI;
289 stub.result_state_ = result;
291 stub.GetCode(isolate);
295 void BinaryOpStub::GenerateAheadOfTime(Isolate* isolate) {
296 Token::Value binop[] = {Token::SUB, Token::MOD, Token::DIV, Token::MUL,
297 Token::ADD, Token::SAR, Token::BIT_OR, Token::BIT_AND,
298 Token::BIT_XOR, Token::SHL, Token::SHR};
299 for (unsigned i = 0; i < ARRAY_SIZE(binop); i++) {
300 BinaryOpStub stub(UNINITIALIZED);
302 stub.GetCode(isolate);
305 // TODO(olivf) We should investigate why adding stubs to the snapshot is so
306 // expensive at runtime. When solved we should be able to add most binops to
307 // the snapshot instead of hand-picking them.
308 // Generated list of commonly used stubs
309 Generate(Token::ADD, INT32, INT32, INT32, NO_OVERWRITE, isolate);
310 Generate(Token::ADD, INT32, INT32, INT32, OVERWRITE_LEFT, isolate);
311 Generate(Token::ADD, INT32, INT32, NUMBER, NO_OVERWRITE, isolate);
312 Generate(Token::ADD, INT32, INT32, NUMBER, OVERWRITE_LEFT, isolate);
313 Generate(Token::ADD, INT32, NUMBER, NUMBER, NO_OVERWRITE, isolate);
314 Generate(Token::ADD, INT32, NUMBER, NUMBER, OVERWRITE_LEFT, isolate);
315 Generate(Token::ADD, INT32, NUMBER, NUMBER, OVERWRITE_RIGHT, isolate);
316 Generate(Token::ADD, INT32, SMI, INT32, NO_OVERWRITE, isolate);
317 Generate(Token::ADD, INT32, SMI, INT32, OVERWRITE_LEFT, isolate);
318 Generate(Token::ADD, INT32, SMI, INT32, OVERWRITE_RIGHT, isolate);
319 Generate(Token::ADD, NUMBER, INT32, NUMBER, NO_OVERWRITE, isolate);
320 Generate(Token::ADD, NUMBER, INT32, NUMBER, OVERWRITE_LEFT, isolate);
321 Generate(Token::ADD, NUMBER, INT32, NUMBER, OVERWRITE_RIGHT, isolate);
322 Generate(Token::ADD, NUMBER, NUMBER, NUMBER, NO_OVERWRITE, isolate);
323 Generate(Token::ADD, NUMBER, NUMBER, NUMBER, OVERWRITE_LEFT, isolate);
324 Generate(Token::ADD, NUMBER, NUMBER, NUMBER, OVERWRITE_RIGHT, isolate);
325 Generate(Token::ADD, NUMBER, SMI, NUMBER, NO_OVERWRITE, isolate);
326 Generate(Token::ADD, NUMBER, SMI, NUMBER, OVERWRITE_LEFT, isolate);
327 Generate(Token::ADD, NUMBER, SMI, NUMBER, OVERWRITE_RIGHT, isolate);
328 Generate(Token::ADD, SMI, INT32, INT32, NO_OVERWRITE, isolate);
329 Generate(Token::ADD, SMI, INT32, INT32, OVERWRITE_LEFT, isolate);
330 Generate(Token::ADD, SMI, INT32, NUMBER, NO_OVERWRITE, isolate);
331 Generate(Token::ADD, SMI, NUMBER, NUMBER, NO_OVERWRITE, isolate);
332 Generate(Token::ADD, SMI, NUMBER, NUMBER, OVERWRITE_LEFT, isolate);
333 Generate(Token::ADD, SMI, NUMBER, NUMBER, OVERWRITE_RIGHT, isolate);
334 Generate(Token::ADD, SMI, SMI, INT32, OVERWRITE_LEFT, isolate);
335 Generate(Token::ADD, SMI, SMI, SMI, OVERWRITE_RIGHT, isolate);
336 Generate(Token::BIT_AND, INT32, INT32, INT32, NO_OVERWRITE, isolate);
337 Generate(Token::BIT_AND, INT32, INT32, INT32, OVERWRITE_LEFT, isolate);
338 Generate(Token::BIT_AND, INT32, INT32, INT32, OVERWRITE_RIGHT, isolate);
339 Generate(Token::BIT_AND, INT32, INT32, SMI, NO_OVERWRITE, isolate);
340 Generate(Token::BIT_AND, INT32, INT32, SMI, OVERWRITE_RIGHT, isolate);
341 Generate(Token::BIT_AND, INT32, SMI, INT32, NO_OVERWRITE, isolate);
342 Generate(Token::BIT_AND, INT32, SMI, INT32, OVERWRITE_RIGHT, isolate);
343 Generate(Token::BIT_AND, INT32, SMI, SMI, NO_OVERWRITE, isolate);
344 Generate(Token::BIT_AND, INT32, SMI, SMI, OVERWRITE_LEFT, isolate);
345 Generate(Token::BIT_AND, INT32, SMI, SMI, OVERWRITE_RIGHT, isolate);
346 Generate(Token::BIT_AND, NUMBER, INT32, INT32, OVERWRITE_RIGHT, isolate);
347 Generate(Token::BIT_AND, NUMBER, SMI, SMI, NO_OVERWRITE, isolate);
348 Generate(Token::BIT_AND, NUMBER, SMI, SMI, OVERWRITE_RIGHT, isolate);
349 Generate(Token::BIT_AND, SMI, INT32, INT32, NO_OVERWRITE, isolate);
350 Generate(Token::BIT_AND, SMI, INT32, SMI, OVERWRITE_RIGHT, isolate);
351 Generate(Token::BIT_AND, SMI, NUMBER, SMI, OVERWRITE_RIGHT, isolate);
352 Generate(Token::BIT_AND, SMI, SMI, SMI, NO_OVERWRITE, isolate);
353 Generate(Token::BIT_AND, SMI, SMI, SMI, OVERWRITE_LEFT, isolate);
354 Generate(Token::BIT_AND, SMI, SMI, SMI, OVERWRITE_RIGHT, isolate);
355 Generate(Token::BIT_OR, INT32, INT32, INT32, OVERWRITE_LEFT, isolate);
356 Generate(Token::BIT_OR, INT32, INT32, INT32, OVERWRITE_RIGHT, isolate);
357 Generate(Token::BIT_OR, INT32, INT32, SMI, OVERWRITE_LEFT, isolate);
358 Generate(Token::BIT_OR, INT32, SMI, INT32, NO_OVERWRITE, isolate);
359 Generate(Token::BIT_OR, INT32, SMI, INT32, OVERWRITE_LEFT, isolate);
360 Generate(Token::BIT_OR, INT32, SMI, INT32, OVERWRITE_RIGHT, isolate);
361 Generate(Token::BIT_OR, INT32, SMI, SMI, NO_OVERWRITE, isolate);
362 Generate(Token::BIT_OR, INT32, SMI, SMI, OVERWRITE_RIGHT, isolate);
363 Generate(Token::BIT_OR, NUMBER, SMI, INT32, NO_OVERWRITE, isolate);
364 Generate(Token::BIT_OR, NUMBER, SMI, INT32, OVERWRITE_LEFT, isolate);
365 Generate(Token::BIT_OR, NUMBER, SMI, INT32, OVERWRITE_RIGHT, isolate);
366 Generate(Token::BIT_OR, NUMBER, SMI, SMI, NO_OVERWRITE, isolate);
367 Generate(Token::BIT_OR, NUMBER, SMI, SMI, OVERWRITE_LEFT, isolate);
368 Generate(Token::BIT_OR, SMI, INT32, INT32, OVERWRITE_LEFT, isolate);
369 Generate(Token::BIT_OR, SMI, INT32, INT32, OVERWRITE_RIGHT, isolate);
370 Generate(Token::BIT_OR, SMI, INT32, SMI, OVERWRITE_RIGHT, isolate);
371 Generate(Token::BIT_OR, SMI, SMI, SMI, OVERWRITE_LEFT, isolate);
372 Generate(Token::BIT_OR, SMI, SMI, SMI, OVERWRITE_RIGHT, isolate);
373 Generate(Token::BIT_XOR, INT32, INT32, INT32, NO_OVERWRITE, isolate);
374 Generate(Token::BIT_XOR, INT32, INT32, INT32, OVERWRITE_LEFT, isolate);
375 Generate(Token::BIT_XOR, INT32, INT32, INT32, OVERWRITE_RIGHT, isolate);
376 Generate(Token::BIT_XOR, INT32, INT32, SMI, NO_OVERWRITE, isolate);
377 Generate(Token::BIT_XOR, INT32, INT32, SMI, OVERWRITE_LEFT, isolate);
378 Generate(Token::BIT_XOR, INT32, NUMBER, SMI, NO_OVERWRITE, isolate);
379 Generate(Token::BIT_XOR, INT32, SMI, INT32, NO_OVERWRITE, isolate);
380 Generate(Token::BIT_XOR, INT32, SMI, INT32, OVERWRITE_LEFT, isolate);
381 Generate(Token::BIT_XOR, INT32, SMI, INT32, OVERWRITE_RIGHT, isolate);
382 Generate(Token::BIT_XOR, NUMBER, INT32, INT32, NO_OVERWRITE, isolate);
383 Generate(Token::BIT_XOR, NUMBER, SMI, INT32, NO_OVERWRITE, isolate);
384 Generate(Token::BIT_XOR, NUMBER, SMI, SMI, NO_OVERWRITE, isolate);
385 Generate(Token::BIT_XOR, SMI, INT32, INT32, NO_OVERWRITE, isolate);
386 Generate(Token::BIT_XOR, SMI, INT32, INT32, OVERWRITE_LEFT, isolate);
387 Generate(Token::BIT_XOR, SMI, INT32, SMI, OVERWRITE_LEFT, isolate);
388 Generate(Token::BIT_XOR, SMI, SMI, SMI, NO_OVERWRITE, isolate);
389 Generate(Token::BIT_XOR, SMI, SMI, SMI, OVERWRITE_LEFT, isolate);
390 Generate(Token::BIT_XOR, SMI, SMI, SMI, OVERWRITE_RIGHT, isolate);
391 Generate(Token::DIV, INT32, INT32, INT32, NO_OVERWRITE, isolate);
392 Generate(Token::DIV, INT32, INT32, NUMBER, NO_OVERWRITE, isolate);
393 Generate(Token::DIV, INT32, NUMBER, NUMBER, NO_OVERWRITE, isolate);
394 Generate(Token::DIV, INT32, NUMBER, NUMBER, OVERWRITE_LEFT, isolate);
395 Generate(Token::DIV, INT32, SMI, INT32, NO_OVERWRITE, isolate);
396 Generate(Token::DIV, INT32, SMI, NUMBER, NO_OVERWRITE, isolate);
397 Generate(Token::DIV, NUMBER, INT32, NUMBER, NO_OVERWRITE, isolate);
398 Generate(Token::DIV, NUMBER, INT32, NUMBER, OVERWRITE_LEFT, isolate);
399 Generate(Token::DIV, NUMBER, NUMBER, NUMBER, NO_OVERWRITE, isolate);
400 Generate(Token::DIV, NUMBER, NUMBER, NUMBER, OVERWRITE_LEFT, isolate);
401 Generate(Token::DIV, NUMBER, NUMBER, NUMBER, OVERWRITE_RIGHT, isolate);
402 Generate(Token::DIV, NUMBER, SMI, NUMBER, NO_OVERWRITE, isolate);
403 Generate(Token::DIV, NUMBER, SMI, NUMBER, OVERWRITE_LEFT, isolate);
404 Generate(Token::DIV, SMI, INT32, INT32, NO_OVERWRITE, isolate);
405 Generate(Token::DIV, SMI, INT32, NUMBER, NO_OVERWRITE, isolate);
406 Generate(Token::DIV, SMI, INT32, NUMBER, OVERWRITE_LEFT, isolate);
407 Generate(Token::DIV, SMI, NUMBER, NUMBER, NO_OVERWRITE, isolate);
408 Generate(Token::DIV, SMI, NUMBER, NUMBER, OVERWRITE_LEFT, isolate);
409 Generate(Token::DIV, SMI, NUMBER, NUMBER, OVERWRITE_RIGHT, isolate);
410 Generate(Token::DIV, SMI, SMI, NUMBER, NO_OVERWRITE, isolate);
411 Generate(Token::DIV, SMI, SMI, NUMBER, OVERWRITE_LEFT, isolate);
412 Generate(Token::DIV, SMI, SMI, NUMBER, OVERWRITE_RIGHT, isolate);
413 Generate(Token::DIV, SMI, SMI, SMI, NO_OVERWRITE, isolate);
414 Generate(Token::DIV, SMI, SMI, SMI, OVERWRITE_LEFT, isolate);
415 Generate(Token::DIV, SMI, SMI, SMI, OVERWRITE_RIGHT, isolate);
416 Generate(Token::MOD, NUMBER, SMI, NUMBER, OVERWRITE_LEFT, isolate);
417 Generate(Token::MOD, SMI, 16, SMI, OVERWRITE_LEFT, isolate);
418 Generate(Token::MOD, SMI, 2, SMI, NO_OVERWRITE, isolate);
419 Generate(Token::MOD, SMI, 2048, SMI, NO_OVERWRITE, isolate);
420 Generate(Token::MOD, SMI, 32, SMI, NO_OVERWRITE, isolate);
421 Generate(Token::MOD, SMI, 4, SMI, NO_OVERWRITE, isolate);
422 Generate(Token::MOD, SMI, 4, SMI, OVERWRITE_LEFT, isolate);
423 Generate(Token::MOD, SMI, 8, SMI, NO_OVERWRITE, isolate);
424 Generate(Token::MOD, SMI, SMI, SMI, NO_OVERWRITE, isolate);
425 Generate(Token::MOD, SMI, SMI, SMI, OVERWRITE_LEFT, isolate);
426 Generate(Token::MUL, INT32, INT32, INT32, NO_OVERWRITE, isolate);
427 Generate(Token::MUL, INT32, INT32, NUMBER, NO_OVERWRITE, isolate);
428 Generate(Token::MUL, INT32, NUMBER, NUMBER, NO_OVERWRITE, isolate);
429 Generate(Token::MUL, INT32, NUMBER, NUMBER, OVERWRITE_LEFT, isolate);
430 Generate(Token::MUL, INT32, SMI, INT32, NO_OVERWRITE, isolate);
431 Generate(Token::MUL, INT32, SMI, INT32, OVERWRITE_LEFT, isolate);
432 Generate(Token::MUL, INT32, SMI, NUMBER, NO_OVERWRITE, isolate);
433 Generate(Token::MUL, NUMBER, INT32, NUMBER, NO_OVERWRITE, isolate);
434 Generate(Token::MUL, NUMBER, INT32, NUMBER, OVERWRITE_LEFT, isolate);
435 Generate(Token::MUL, NUMBER, INT32, NUMBER, OVERWRITE_RIGHT, isolate);
436 Generate(Token::MUL, NUMBER, NUMBER, NUMBER, NO_OVERWRITE, isolate);
437 Generate(Token::MUL, NUMBER, NUMBER, NUMBER, OVERWRITE_LEFT, isolate);
438 Generate(Token::MUL, NUMBER, SMI, NUMBER, NO_OVERWRITE, isolate);
439 Generate(Token::MUL, NUMBER, SMI, NUMBER, OVERWRITE_LEFT, isolate);
440 Generate(Token::MUL, NUMBER, SMI, NUMBER, OVERWRITE_RIGHT, isolate);
441 Generate(Token::MUL, SMI, INT32, INT32, NO_OVERWRITE, isolate);
442 Generate(Token::MUL, SMI, INT32, INT32, OVERWRITE_LEFT, isolate);
443 Generate(Token::MUL, SMI, INT32, NUMBER, NO_OVERWRITE, isolate);
444 Generate(Token::MUL, SMI, NUMBER, NUMBER, NO_OVERWRITE, isolate);
445 Generate(Token::MUL, SMI, NUMBER, NUMBER, OVERWRITE_LEFT, isolate);
446 Generate(Token::MUL, SMI, NUMBER, NUMBER, OVERWRITE_RIGHT, isolate);
447 Generate(Token::MUL, SMI, SMI, INT32, NO_OVERWRITE, isolate);
448 Generate(Token::MUL, SMI, SMI, NUMBER, NO_OVERWRITE, isolate);
449 Generate(Token::MUL, SMI, SMI, NUMBER, OVERWRITE_LEFT, isolate);
450 Generate(Token::MUL, SMI, SMI, SMI, NO_OVERWRITE, isolate);
451 Generate(Token::MUL, SMI, SMI, SMI, OVERWRITE_LEFT, isolate);
452 Generate(Token::MUL, SMI, SMI, SMI, OVERWRITE_RIGHT, isolate);
453 Generate(Token::SAR, INT32, SMI, INT32, OVERWRITE_RIGHT, isolate);
454 Generate(Token::SAR, INT32, SMI, SMI, NO_OVERWRITE, isolate);
455 Generate(Token::SAR, INT32, SMI, SMI, OVERWRITE_RIGHT, isolate);
456 Generate(Token::SAR, NUMBER, SMI, SMI, NO_OVERWRITE, isolate);
457 Generate(Token::SAR, NUMBER, SMI, SMI, OVERWRITE_RIGHT, isolate);
458 Generate(Token::SAR, SMI, SMI, SMI, OVERWRITE_LEFT, isolate);
459 Generate(Token::SAR, SMI, SMI, SMI, OVERWRITE_RIGHT, isolate);
460 Generate(Token::SHL, INT32, SMI, INT32, NO_OVERWRITE, isolate);
461 Generate(Token::SHL, INT32, SMI, INT32, OVERWRITE_RIGHT, isolate);
462 Generate(Token::SHL, INT32, SMI, SMI, NO_OVERWRITE, isolate);
463 Generate(Token::SHL, INT32, SMI, SMI, OVERWRITE_RIGHT, isolate);
464 Generate(Token::SHL, NUMBER, SMI, SMI, OVERWRITE_RIGHT, isolate);
465 Generate(Token::SHL, SMI, SMI, INT32, NO_OVERWRITE, isolate);
466 Generate(Token::SHL, SMI, SMI, INT32, OVERWRITE_LEFT, isolate);
467 Generate(Token::SHL, SMI, SMI, INT32, OVERWRITE_RIGHT, isolate);
468 Generate(Token::SHL, SMI, SMI, SMI, NO_OVERWRITE, isolate);
469 Generate(Token::SHL, SMI, SMI, SMI, OVERWRITE_LEFT, isolate);
470 Generate(Token::SHL, SMI, SMI, SMI, OVERWRITE_RIGHT, isolate);
471 Generate(Token::SHR, INT32, SMI, SMI, NO_OVERWRITE, isolate);
472 Generate(Token::SHR, INT32, SMI, SMI, OVERWRITE_LEFT, isolate);
473 Generate(Token::SHR, INT32, SMI, SMI, OVERWRITE_RIGHT, isolate);
474 Generate(Token::SHR, NUMBER, SMI, SMI, NO_OVERWRITE, isolate);
475 Generate(Token::SHR, NUMBER, SMI, SMI, OVERWRITE_LEFT, isolate);
476 Generate(Token::SHR, NUMBER, SMI, INT32, OVERWRITE_RIGHT, isolate);
477 Generate(Token::SHR, SMI, SMI, SMI, NO_OVERWRITE, isolate);
478 Generate(Token::SHR, SMI, SMI, SMI, OVERWRITE_LEFT, isolate);
479 Generate(Token::SHR, SMI, SMI, SMI, OVERWRITE_RIGHT, isolate);
480 Generate(Token::SUB, INT32, INT32, INT32, NO_OVERWRITE, isolate);
481 Generate(Token::SUB, INT32, INT32, INT32, OVERWRITE_LEFT, isolate);
482 Generate(Token::SUB, INT32, NUMBER, NUMBER, NO_OVERWRITE, isolate);
483 Generate(Token::SUB, INT32, NUMBER, NUMBER, OVERWRITE_RIGHT, isolate);
484 Generate(Token::SUB, INT32, SMI, INT32, OVERWRITE_LEFT, isolate);
485 Generate(Token::SUB, INT32, SMI, INT32, OVERWRITE_RIGHT, isolate);
486 Generate(Token::SUB, NUMBER, INT32, NUMBER, NO_OVERWRITE, isolate);
487 Generate(Token::SUB, NUMBER, INT32, NUMBER, OVERWRITE_LEFT, isolate);
488 Generate(Token::SUB, NUMBER, NUMBER, NUMBER, NO_OVERWRITE, isolate);
489 Generate(Token::SUB, NUMBER, NUMBER, NUMBER, OVERWRITE_LEFT, isolate);
490 Generate(Token::SUB, NUMBER, NUMBER, NUMBER, OVERWRITE_RIGHT, isolate);
491 Generate(Token::SUB, NUMBER, SMI, NUMBER, NO_OVERWRITE, isolate);
492 Generate(Token::SUB, NUMBER, SMI, NUMBER, OVERWRITE_LEFT, isolate);
493 Generate(Token::SUB, NUMBER, SMI, NUMBER, OVERWRITE_RIGHT, isolate);
494 Generate(Token::SUB, SMI, INT32, INT32, NO_OVERWRITE, isolate);
495 Generate(Token::SUB, SMI, NUMBER, NUMBER, NO_OVERWRITE, isolate);
496 Generate(Token::SUB, SMI, NUMBER, NUMBER, OVERWRITE_LEFT, isolate);
497 Generate(Token::SUB, SMI, NUMBER, NUMBER, OVERWRITE_RIGHT, isolate);
498 Generate(Token::SUB, SMI, SMI, SMI, NO_OVERWRITE, isolate);
499 Generate(Token::SUB, SMI, SMI, SMI, OVERWRITE_LEFT, isolate);
500 Generate(Token::SUB, SMI, SMI, SMI, OVERWRITE_RIGHT, isolate);
504 bool BinaryOpStub::can_encode_arg_value(int32_t value) const {
505 return op_ == Token::MOD && value > 0 && IsPowerOf2(value) &&
506 FixedRightArgValueBits::is_valid(WhichPowerOf2(value));
510 int BinaryOpStub::encode_arg_value(int32_t value) const {
511 ASSERT(can_encode_arg_value(value));
512 return WhichPowerOf2(value);
516 int32_t BinaryOpStub::decode_arg_value(int value) const {
521 int BinaryOpStub::encode_token(Token::Value op) const {
522 ASSERT(op >= FIRST_TOKEN && op <= LAST_TOKEN);
523 return op - FIRST_TOKEN;
527 Token::Value BinaryOpStub::decode_token(int op) const {
528 int res = op + FIRST_TOKEN;
529 ASSERT(res >= FIRST_TOKEN && res <= LAST_TOKEN);
530 return static_cast<Token::Value>(res);
534 const char* BinaryOpStub::StateToName(State state) {
553 void BinaryOpStub::UpdateStatus(Handle<Object> left,
554 Handle<Object> right,
555 Maybe<Handle<Object> > result) {
556 int old_state = GetExtraICState();
558 UpdateStatus(left, &left_state_);
559 UpdateStatus(right, &right_state_);
562 bool new_has_fixed_right_arg =
563 right->ToInt32(&value) && can_encode_arg_value(value) &&
564 (left_state_ == SMI || left_state_ == INT32) &&
565 (result_state_ == NONE || !fixed_right_arg_.has_value);
567 fixed_right_arg_ = Maybe<int32_t>(new_has_fixed_right_arg, value);
569 if (result.has_value) UpdateStatus(result.value, &result_state_);
571 State max_input = Max(left_state_, right_state_);
573 if (!has_int_result() && op_ != Token::SHR &&
574 max_input <= NUMBER && max_input > result_state_) {
575 result_state_ = max_input;
578 ASSERT(result_state_ <= (has_int_result() ? INT32 : NUMBER) ||
581 if (old_state == GetExtraICState()) {
582 // Tagged operations can lead to non-truncating HChanges
583 if (left->IsUndefined() || left->IsBoolean()) {
584 left_state_ = GENERIC;
585 } else if (right->IsUndefined() || right->IsBoolean()) {
586 right_state_ = GENERIC;
588 // Since the fpu is to precise, we might bail out on numbers which
589 // actually would truncate with 64 bit precision.
590 ASSERT(!CpuFeatures::IsSupported(SSE2) &&
591 result_state_ <= INT32);
592 result_state_ = NUMBER;
598 void BinaryOpStub::UpdateStatus(Handle<Object> object,
600 bool is_truncating = (op_ == Token::BIT_AND || op_ == Token::BIT_OR ||
601 op_ == Token::BIT_XOR || op_ == Token::SAR ||
602 op_ == Token::SHL || op_ == Token::SHR);
603 v8::internal::TypeInfo type = v8::internal::TypeInfo::FromValue(object);
604 if (object->IsBoolean() && is_truncating) {
605 // Booleans are converted by truncating by HChange.
606 type = TypeInfo::Integer32();
608 if (object->IsUndefined()) {
609 // Undefined will be automatically truncated for us by HChange.
610 type = is_truncating ? TypeInfo::Integer32() : TypeInfo::Double();
612 State int_state = SmiValuesAre32Bits() ? NUMBER : INT32;
613 State new_state = NONE;
616 } else if (type.IsInteger32()) {
617 new_state = int_state;
618 } else if (type.IsNumber()) {
620 } else if (object->IsString() && operation() == Token::ADD) {
625 if ((new_state <= NUMBER && *state > NUMBER) ||
626 (new_state > NUMBER && *state <= NUMBER && *state != NONE)) {
629 *state = Max(*state, new_state);
633 Handle<Type> BinaryOpStub::StateToType(State state,
635 Handle<Type> t = handle(Type::None(), isolate);
638 t = handle(Type::Union(t, handle(Type::Double(), isolate)), isolate);
641 t = handle(Type::Union(t, handle(Type::Signed32(), isolate)), isolate);
644 t = handle(Type::Union(t, handle(Type::Smi(), isolate)), isolate);
648 t = handle(Type::Union(t, handle(Type::String(), isolate)), isolate);
651 return handle(Type::Any(), isolate);
660 Handle<Type> BinaryOpStub::GetLeftType(Isolate* isolate) const {
661 return StateToType(left_state_, isolate);
665 Handle<Type> BinaryOpStub::GetRightType(Isolate* isolate) const {
666 return StateToType(right_state_, isolate);
670 Handle<Type> BinaryOpStub::GetResultType(Isolate* isolate) const {
671 if (HasSideEffects(isolate)) return StateToType(NONE, isolate);
672 if (result_state_ == GENERIC && op_ == Token::ADD) {
673 return handle(Type::Union(handle(Type::Number(), isolate),
674 handle(Type::String(), isolate)), isolate);
676 ASSERT(result_state_ != GENERIC);
677 if (result_state_ == NUMBER && op_ == Token::SHR) {
678 return handle(Type::Unsigned32(), isolate);
680 return StateToType(result_state_, isolate);
684 InlineCacheState ICCompareStub::GetICState() {
685 CompareIC::State state = Max(left_, right_);
687 case CompareIC::UNINITIALIZED:
688 return ::v8::internal::UNINITIALIZED;
690 case CompareIC::NUMBER:
691 case CompareIC::INTERNALIZED_STRING:
692 case CompareIC::STRING:
693 case CompareIC::UNIQUE_NAME:
694 case CompareIC::OBJECT:
695 case CompareIC::KNOWN_OBJECT:
697 case CompareIC::GENERIC:
698 return ::v8::internal::GENERIC;
701 return ::v8::internal::UNINITIALIZED;
705 void ICCompareStub::AddToSpecialCache(Handle<Code> new_object) {
706 ASSERT(*known_map_ != NULL);
707 Isolate* isolate = new_object->GetIsolate();
708 Factory* factory = isolate->factory();
709 return Map::UpdateCodeCache(known_map_,
711 factory->strict_compare_ic_string() :
712 factory->compare_ic_string(),
717 bool ICCompareStub::FindCodeInSpecialCache(Code** code_out, Isolate* isolate) {
718 Factory* factory = isolate->factory();
719 Code::Flags flags = Code::ComputeFlags(
722 ASSERT(op_ == Token::EQ || op_ == Token::EQ_STRICT);
723 Handle<Object> probe(
724 known_map_->FindInCodeCache(
726 *factory->strict_compare_ic_string() :
727 *factory->compare_ic_string(),
730 if (probe->IsCode()) {
731 *code_out = Code::cast(*probe);
733 Token::Value cached_op;
734 ICCompareStub::DecodeMinorKey((*code_out)->stub_info(), NULL, NULL, NULL,
736 ASSERT(op_ == cached_op);
744 int ICCompareStub::MinorKey() {
745 return OpField::encode(op_ - Token::EQ) |
746 LeftStateField::encode(left_) |
747 RightStateField::encode(right_) |
748 HandlerStateField::encode(state_);
752 void ICCompareStub::DecodeMinorKey(int minor_key,
753 CompareIC::State* left_state,
754 CompareIC::State* right_state,
755 CompareIC::State* handler_state,
759 static_cast<CompareIC::State>(LeftStateField::decode(minor_key));
763 static_cast<CompareIC::State>(RightStateField::decode(minor_key));
767 static_cast<CompareIC::State>(HandlerStateField::decode(minor_key));
770 *op = static_cast<Token::Value>(OpField::decode(minor_key) + Token::EQ);
775 void ICCompareStub::Generate(MacroAssembler* masm) {
777 case CompareIC::UNINITIALIZED:
783 case CompareIC::NUMBER:
784 GenerateNumbers(masm);
786 case CompareIC::STRING:
787 GenerateStrings(masm);
789 case CompareIC::INTERNALIZED_STRING:
790 GenerateInternalizedStrings(masm);
792 case CompareIC::UNIQUE_NAME:
793 GenerateUniqueNames(masm);
795 case CompareIC::OBJECT:
796 GenerateObjects(masm);
798 case CompareIC::KNOWN_OBJECT:
799 ASSERT(*known_map_ != NULL);
800 GenerateKnownObjects(masm);
802 case CompareIC::GENERIC:
803 GenerateGeneric(masm);
809 void CompareNilICStub::UpdateStatus(Handle<Object> object) {
810 ASSERT(!state_.Contains(GENERIC));
811 State old_state(state_);
812 if (object->IsNull()) {
813 state_.Add(NULL_TYPE);
814 } else if (object->IsUndefined()) {
815 state_.Add(UNDEFINED);
816 } else if (object->IsUndetectableObject() ||
817 object->IsOddball() ||
818 !object->IsHeapObject()) {
821 } else if (IsMonomorphic()) {
825 state_.Add(MONOMORPHIC_MAP);
827 TraceTransition(old_state, state_);
831 template<class StateType>
832 void HydrogenCodeStub::TraceTransition(StateType from, StateType to) {
833 // Note: Although a no-op transition is semantically OK, it is hinting at a
834 // bug somewhere in our state transition machinery.
837 if (!FLAG_trace_ic) return;
839 NoAllocationStringAllocator allocator(buffer,
840 static_cast<unsigned>(sizeof(buffer)));
841 StringStream stream(&allocator);
843 PrintBaseName(&stream);
849 stream.OutputToStdOut();
854 void CompareNilICStub::PrintBaseName(StringStream* stream) {
855 CodeStub::PrintBaseName(stream);
856 stream->Add((nil_value_ == kNullValue) ? "(NullValue)":
861 void CompareNilICStub::PrintState(StringStream* stream) {
862 state_.Print(stream);
866 void CompareNilICStub::State::Print(StringStream* stream) const {
868 SimpleListPrinter printer(stream);
869 if (IsEmpty()) printer.Add("None");
870 if (Contains(UNDEFINED)) printer.Add("Undefined");
871 if (Contains(NULL_TYPE)) printer.Add("Null");
872 if (Contains(MONOMORPHIC_MAP)) printer.Add("MonomorphicMap");
873 if (Contains(GENERIC)) printer.Add("Generic");
878 Handle<Type> CompareNilICStub::GetType(
881 if (state_.Contains(CompareNilICStub::GENERIC)) {
882 return handle(Type::Any(), isolate);
885 Handle<Type> result(Type::None(), isolate);
886 if (state_.Contains(CompareNilICStub::UNDEFINED)) {
887 result = handle(Type::Union(result, handle(Type::Undefined(), isolate)),
890 if (state_.Contains(CompareNilICStub::NULL_TYPE)) {
891 result = handle(Type::Union(result, handle(Type::Null(), isolate)),
894 if (state_.Contains(CompareNilICStub::MONOMORPHIC_MAP)) {
895 Type* type = map.is_null() ? Type::Detectable() : Type::Class(map);
896 result = handle(Type::Union(result, handle(type, isolate)), isolate);
903 Handle<Type> CompareNilICStub::GetInputType(
906 Handle<Type> output_type = GetType(isolate, map);
907 Handle<Type> nil_type = handle(nil_value_ == kNullValue
908 ? Type::Null() : Type::Undefined(), isolate);
909 return handle(Type::Union(output_type, nil_type), isolate);
913 void InstanceofStub::PrintName(StringStream* stream) {
914 const char* args = "";
915 if (HasArgsInRegisters()) {
919 const char* inline_check = "";
920 if (HasCallSiteInlineCheck()) {
921 inline_check = "_INLINE";
924 const char* return_true_false_object = "";
925 if (ReturnTrueFalseObject()) {
926 return_true_false_object = "_TRUEFALSE";
929 stream->Add("InstanceofStub%s%s%s",
932 return_true_false_object);
936 void JSEntryStub::FinishCode(Handle<Code> code) {
937 Handle<FixedArray> handler_table =
938 code->GetIsolate()->factory()->NewFixedArray(1, TENURED);
939 handler_table->set(0, Smi::FromInt(handler_offset_));
940 code->set_handler_table(*handler_table);
944 void KeyedLoadDictionaryElementStub::Generate(MacroAssembler* masm) {
945 KeyedLoadStubCompiler::GenerateLoadDictionaryElement(masm);
949 void CreateAllocationSiteStub::GenerateAheadOfTime(Isolate* isolate) {
950 CreateAllocationSiteStub stub;
951 stub.GetCode(isolate)->set_is_pregenerated(true);
955 void KeyedStoreElementStub::Generate(MacroAssembler* masm) {
956 switch (elements_kind_) {
958 case FAST_HOLEY_ELEMENTS:
959 case FAST_SMI_ELEMENTS:
960 case FAST_HOLEY_SMI_ELEMENTS:
961 case FAST_DOUBLE_ELEMENTS:
962 case FAST_HOLEY_DOUBLE_ELEMENTS:
963 case EXTERNAL_BYTE_ELEMENTS:
964 case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
965 case EXTERNAL_SHORT_ELEMENTS:
966 case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
967 case EXTERNAL_INT_ELEMENTS:
968 case EXTERNAL_UNSIGNED_INT_ELEMENTS:
969 case EXTERNAL_FLOAT_ELEMENTS:
970 case EXTERNAL_DOUBLE_ELEMENTS:
971 case EXTERNAL_PIXEL_ELEMENTS:
974 case DICTIONARY_ELEMENTS:
975 KeyedStoreStubCompiler::GenerateStoreDictionaryElement(masm);
977 case NON_STRICT_ARGUMENTS_ELEMENTS:
984 void ArgumentsAccessStub::PrintName(StringStream* stream) {
985 stream->Add("ArgumentsAccessStub_");
987 case READ_ELEMENT: stream->Add("ReadElement"); break;
988 case NEW_NON_STRICT_FAST: stream->Add("NewNonStrictFast"); break;
989 case NEW_NON_STRICT_SLOW: stream->Add("NewNonStrictSlow"); break;
990 case NEW_STRICT: stream->Add("NewStrict"); break;
995 void CallFunctionStub::PrintName(StringStream* stream) {
996 stream->Add("CallFunctionStub_Args%d", argc_);
997 if (ReceiverMightBeImplicit()) stream->Add("_Implicit");
998 if (RecordCallTarget()) stream->Add("_Recording");
1002 void CallConstructStub::PrintName(StringStream* stream) {
1003 stream->Add("CallConstructStub");
1004 if (RecordCallTarget()) stream->Add("_Recording");
1008 bool ToBooleanStub::UpdateStatus(Handle<Object> object) {
1009 Types old_types(types_);
1010 bool to_boolean_value = types_.UpdateStatus(object);
1011 TraceTransition(old_types, types_);
1012 return to_boolean_value;
1016 void ToBooleanStub::PrintState(StringStream* stream) {
1017 types_.Print(stream);
1021 void ToBooleanStub::Types::Print(StringStream* stream) const {
1023 SimpleListPrinter printer(stream);
1024 if (IsEmpty()) printer.Add("None");
1025 if (Contains(UNDEFINED)) printer.Add("Undefined");
1026 if (Contains(BOOLEAN)) printer.Add("Bool");
1027 if (Contains(NULL_TYPE)) printer.Add("Null");
1028 if (Contains(SMI)) printer.Add("Smi");
1029 if (Contains(SPEC_OBJECT)) printer.Add("SpecObject");
1030 if (Contains(STRING)) printer.Add("String");
1031 if (Contains(SYMBOL)) printer.Add("Symbol");
1032 if (Contains(HEAP_NUMBER)) printer.Add("HeapNumber");
1037 bool ToBooleanStub::Types::UpdateStatus(Handle<Object> object) {
1038 if (object->IsUndefined()) {
1041 } else if (object->IsBoolean()) {
1043 return object->IsTrue();
1044 } else if (object->IsNull()) {
1047 } else if (object->IsSmi()) {
1049 return Smi::cast(*object)->value() != 0;
1050 } else if (object->IsSpecObject()) {
1052 return !object->IsUndetectableObject();
1053 } else if (object->IsString()) {
1055 return !object->IsUndetectableObject() &&
1056 String::cast(*object)->length() != 0;
1057 } else if (object->IsSymbol()) {
1060 } else if (object->IsHeapNumber()) {
1061 ASSERT(!object->IsUndetectableObject());
1063 double value = HeapNumber::cast(*object)->value();
1064 return value != 0 && !std::isnan(value);
1066 // We should never see an internal object at runtime here!
1073 bool ToBooleanStub::Types::NeedsMap() const {
1074 return Contains(ToBooleanStub::SPEC_OBJECT)
1075 || Contains(ToBooleanStub::STRING)
1076 || Contains(ToBooleanStub::SYMBOL)
1077 || Contains(ToBooleanStub::HEAP_NUMBER);
1081 bool ToBooleanStub::Types::CanBeUndetectable() const {
1082 return Contains(ToBooleanStub::SPEC_OBJECT)
1083 || Contains(ToBooleanStub::STRING);
1087 void StubFailureTrampolineStub::GenerateAheadOfTime(Isolate* isolate) {
1088 StubFailureTrampolineStub stub1(NOT_JS_FUNCTION_STUB_MODE);
1089 StubFailureTrampolineStub stub2(JS_FUNCTION_STUB_MODE);
1090 stub1.GetCode(isolate)->set_is_pregenerated(true);
1091 stub2.GetCode(isolate)->set_is_pregenerated(true);
1095 void ProfileEntryHookStub::EntryHookTrampoline(intptr_t function,
1096 intptr_t stack_pointer,
1098 FunctionEntryHook entry_hook = isolate->function_entry_hook();
1099 ASSERT(entry_hook != NULL);
1100 entry_hook(function, stack_pointer);
1104 static void InstallDescriptor(Isolate* isolate, HydrogenCodeStub* stub) {
1105 int major_key = stub->MajorKey();
1106 CodeStubInterfaceDescriptor* descriptor =
1107 isolate->code_stub_interface_descriptor(major_key);
1108 if (!descriptor->initialized()) {
1109 stub->InitializeInterfaceDescriptor(isolate, descriptor);
1114 void ArrayConstructorStubBase::InstallDescriptors(Isolate* isolate) {
1115 ArrayNoArgumentConstructorStub stub1(GetInitialFastElementsKind());
1116 InstallDescriptor(isolate, &stub1);
1117 ArraySingleArgumentConstructorStub stub2(GetInitialFastElementsKind());
1118 InstallDescriptor(isolate, &stub2);
1119 ArrayNArgumentsConstructorStub stub3(GetInitialFastElementsKind());
1120 InstallDescriptor(isolate, &stub3);
1124 void NumberToStringStub::InstallDescriptors(Isolate* isolate) {
1125 NumberToStringStub stub;
1126 InstallDescriptor(isolate, &stub);
1130 void FastNewClosureStub::InstallDescriptors(Isolate* isolate) {
1131 FastNewClosureStub stub(STRICT_MODE, false);
1132 InstallDescriptor(isolate, &stub);
1136 ArrayConstructorStub::ArrayConstructorStub(Isolate* isolate)
1137 : argument_count_(ANY) {
1138 ArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate);
1142 ArrayConstructorStub::ArrayConstructorStub(Isolate* isolate,
1143 int argument_count) {
1144 if (argument_count == 0) {
1145 argument_count_ = NONE;
1146 } else if (argument_count == 1) {
1147 argument_count_ = ONE;
1148 } else if (argument_count >= 2) {
1149 argument_count_ = MORE_THAN_ONE;
1153 ArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate);
1157 void InternalArrayConstructorStubBase::InstallDescriptors(Isolate* isolate) {
1158 InternalArrayNoArgumentConstructorStub stub1(FAST_ELEMENTS);
1159 InstallDescriptor(isolate, &stub1);
1160 InternalArraySingleArgumentConstructorStub stub2(FAST_ELEMENTS);
1161 InstallDescriptor(isolate, &stub2);
1162 InternalArrayNArgumentsConstructorStub stub3(FAST_ELEMENTS);
1163 InstallDescriptor(isolate, &stub3);
1166 InternalArrayConstructorStub::InternalArrayConstructorStub(
1168 InternalArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate);
1172 } } // namespace v8::internal