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Issue 10829009: Classify small functions platform-dependently. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 8 years, 5 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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314 } 314 }
315 __ movq(rbx, profiling_counter_, RelocInfo::EMBEDDED_OBJECT); 315 __ movq(rbx, profiling_counter_, RelocInfo::EMBEDDED_OBJECT);
316 __ movq(kScratchRegister, 316 __ movq(kScratchRegister,
317 reinterpret_cast<uint64_t>(Smi::FromInt(reset_value)), 317 reinterpret_cast<uint64_t>(Smi::FromInt(reset_value)),
318 RelocInfo::NONE); 318 RelocInfo::NONE);
319 __ movq(FieldOperand(rbx, JSGlobalPropertyCell::kValueOffset), 319 __ movq(FieldOperand(rbx, JSGlobalPropertyCell::kValueOffset),
320 kScratchRegister); 320 kScratchRegister);
321 } 321 }
322 322
323 323
324 static const int kMaxBackEdgeWeight = 127; 324 const int FullCodeGenerator::kMaxBackEdgeWeight = 127;
325 static const int kBackEdgeDistanceDivisor = 162; 325 const int FullCodeGenerator::kBackEdgeDistanceUnit = 162;
326 326
327 327
328 void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt, 328 void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt,
329 Label* back_edge_target) { 329 Label* back_edge_target) {
330 Comment cmnt(masm_, "[ Stack check"); 330 Comment cmnt(masm_, "[ Stack check");
331 Label ok; 331 Label ok;
332 332
333 if (FLAG_count_based_interrupts) { 333 if (FLAG_count_based_interrupts) {
334 int weight = 1; 334 int weight = 1;
335 if (FLAG_weighted_back_edges) { 335 if (FLAG_weighted_back_edges) {
336 ASSERT(back_edge_target->is_bound()); 336 ASSERT(back_edge_target->is_bound());
337 int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target); 337 int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target);
338 weight = Min(kMaxBackEdgeWeight, 338 weight = Min(kMaxBackEdgeWeight,
339 Max(1, distance / kBackEdgeDistanceDivisor)); 339 Max(1, distance / kBackEdgeDistanceUnit));
340 } 340 }
341 EmitProfilingCounterDecrement(weight); 341 EmitProfilingCounterDecrement(weight);
342 __ j(positive, &ok, Label::kNear); 342 __ j(positive, &ok, Label::kNear);
343 InterruptStub stub; 343 InterruptStub stub;
344 __ CallStub(&stub); 344 __ CallStub(&stub);
345 } else { 345 } else {
346 __ CompareRoot(rsp, Heap::kStackLimitRootIndex); 346 __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
347 __ j(above_equal, &ok, Label::kNear); 347 __ j(above_equal, &ok, Label::kNear);
348 StackCheckStub stub; 348 StackCheckStub stub;
349 __ CallStub(&stub); 349 __ CallStub(&stub);
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385 __ CallRuntime(Runtime::kTraceExit, 1); 385 __ CallRuntime(Runtime::kTraceExit, 1);
386 } 386 }
387 if (FLAG_interrupt_at_exit || FLAG_self_optimization) { 387 if (FLAG_interrupt_at_exit || FLAG_self_optimization) {
388 // Pretend that the exit is a backwards jump to the entry. 388 // Pretend that the exit is a backwards jump to the entry.
389 int weight = 1; 389 int weight = 1;
390 if (info_->ShouldSelfOptimize()) { 390 if (info_->ShouldSelfOptimize()) {
391 weight = FLAG_interrupt_budget / FLAG_self_opt_count; 391 weight = FLAG_interrupt_budget / FLAG_self_opt_count;
392 } else if (FLAG_weighted_back_edges) { 392 } else if (FLAG_weighted_back_edges) {
393 int distance = masm_->pc_offset(); 393 int distance = masm_->pc_offset();
394 weight = Min(kMaxBackEdgeWeight, 394 weight = Min(kMaxBackEdgeWeight,
395 Max(1, distance = kBackEdgeDistanceDivisor)); 395 Max(1, distance / kBackEdgeDistanceUnit));
396 } 396 }
397 EmitProfilingCounterDecrement(weight); 397 EmitProfilingCounterDecrement(weight);
398 Label ok; 398 Label ok;
399 __ j(positive, &ok, Label::kNear); 399 __ j(positive, &ok, Label::kNear);
400 __ push(rax); 400 __ push(rax);
401 if (info_->ShouldSelfOptimize() && FLAG_direct_self_opt) { 401 if (info_->ShouldSelfOptimize() && FLAG_direct_self_opt) {
402 __ push(Operand(rbp, JavaScriptFrameConstants::kFunctionOffset)); 402 __ push(Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
403 __ CallRuntime(Runtime::kOptimizeFunctionOnNextCall, 1); 403 __ CallRuntime(Runtime::kOptimizeFunctionOnNextCall, 1);
404 } else { 404 } else {
405 InterruptStub stub; 405 InterruptStub stub;
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4547 *context_length = 0; 4547 *context_length = 0;
4548 return previous_; 4548 return previous_;
4549 } 4549 }
4550 4550
4551 4551
4552 #undef __ 4552 #undef __
4553 4553
4554 } } // namespace v8::internal 4554 } } // namespace v8::internal
4555 4555
4556 #endif // V8_TARGET_ARCH_X64 4556 #endif // V8_TARGET_ARCH_X64
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