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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, 4 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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318 if (info_->ShouldSelfOptimize() && !FLAG_retry_self_opt) { 318 if (info_->ShouldSelfOptimize() && !FLAG_retry_self_opt) {
319 // Self-optimization is a one-off thing: if it fails, don't try again. 319 // Self-optimization is a one-off thing: if it fails, don't try again.
320 reset_value = Smi::kMaxValue; 320 reset_value = Smi::kMaxValue;
321 } 321 }
322 __ mov(ebx, Immediate(profiling_counter_)); 322 __ mov(ebx, Immediate(profiling_counter_));
323 __ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset), 323 __ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset),
324 Immediate(Smi::FromInt(reset_value))); 324 Immediate(Smi::FromInt(reset_value)));
325 } 325 }
326 326
327 327
328 static const int kMaxBackEdgeWeight = 127; 328 const int FullCodeGenerator::kMaxBackEdgeWeight = 127;
329 static const int kBackEdgeDistanceDivisor = 100; 329 const int FullCodeGenerator::kBackEdgeDistanceUnit = 100;
330 330
331 331
332 void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt, 332 void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt,
333 Label* back_edge_target) { 333 Label* back_edge_target) {
334 Comment cmnt(masm_, "[ Stack check"); 334 Comment cmnt(masm_, "[ Stack check");
335 Label ok; 335 Label ok;
336 336
337 if (FLAG_count_based_interrupts) { 337 if (FLAG_count_based_interrupts) {
338 int weight = 1; 338 int weight = 1;
339 if (FLAG_weighted_back_edges) { 339 if (FLAG_weighted_back_edges) {
340 ASSERT(back_edge_target->is_bound()); 340 ASSERT(back_edge_target->is_bound());
341 int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target); 341 int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target);
342 weight = Min(kMaxBackEdgeWeight, 342 weight = Min(kMaxBackEdgeWeight,
343 Max(1, distance / kBackEdgeDistanceDivisor)); 343 Max(1, distance / kBackEdgeDistanceUnit));
344 } 344 }
345 EmitProfilingCounterDecrement(weight); 345 EmitProfilingCounterDecrement(weight);
346 __ j(positive, &ok, Label::kNear); 346 __ j(positive, &ok, Label::kNear);
347 InterruptStub stub; 347 InterruptStub stub;
348 __ CallStub(&stub); 348 __ CallStub(&stub);
349 } else { 349 } else {
350 // Count based interrupts happen often enough when they are enabled 350 // Count based interrupts happen often enough when they are enabled
351 // that the additional stack checks are not necessary (they would 351 // that the additional stack checks are not necessary (they would
352 // only check for interrupts). 352 // only check for interrupts).
353 ExternalReference stack_limit = 353 ExternalReference stack_limit =
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395 __ CallRuntime(Runtime::kTraceExit, 1); 395 __ CallRuntime(Runtime::kTraceExit, 1);
396 } 396 }
397 if (FLAG_interrupt_at_exit || FLAG_self_optimization) { 397 if (FLAG_interrupt_at_exit || FLAG_self_optimization) {
398 // Pretend that the exit is a backwards jump to the entry. 398 // Pretend that the exit is a backwards jump to the entry.
399 int weight = 1; 399 int weight = 1;
400 if (info_->ShouldSelfOptimize()) { 400 if (info_->ShouldSelfOptimize()) {
401 weight = FLAG_interrupt_budget / FLAG_self_opt_count; 401 weight = FLAG_interrupt_budget / FLAG_self_opt_count;
402 } else if (FLAG_weighted_back_edges) { 402 } else if (FLAG_weighted_back_edges) {
403 int distance = masm_->pc_offset(); 403 int distance = masm_->pc_offset();
404 weight = Min(kMaxBackEdgeWeight, 404 weight = Min(kMaxBackEdgeWeight,
405 Max(1, distance / kBackEdgeDistanceDivisor)); 405 Max(1, distance / kBackEdgeDistanceUnit));
406 } 406 }
407 EmitProfilingCounterDecrement(weight); 407 EmitProfilingCounterDecrement(weight);
408 Label ok; 408 Label ok;
409 __ j(positive, &ok, Label::kNear); 409 __ j(positive, &ok, Label::kNear);
410 __ push(eax); 410 __ push(eax);
411 if (info_->ShouldSelfOptimize() && FLAG_direct_self_opt) { 411 if (info_->ShouldSelfOptimize() && FLAG_direct_self_opt) {
412 __ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); 412 __ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
413 __ CallRuntime(Runtime::kOptimizeFunctionOnNextCall, 1); 413 __ CallRuntime(Runtime::kOptimizeFunctionOnNextCall, 1);
414 } else { 414 } else {
415 InterruptStub stub; 415 InterruptStub stub;
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4552 *stack_depth = 0; 4552 *stack_depth = 0;
4553 *context_length = 0; 4553 *context_length = 0;
4554 return previous_; 4554 return previous_;
4555 } 4555 }
4556 4556
4557 #undef __ 4557 #undef __
4558 4558
4559 } } // namespace v8::internal 4559 } } // namespace v8::internal
4560 4560
4561 #endif // V8_TARGET_ARCH_IA32 4561 #endif // V8_TARGET_ARCH_IA32
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