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Issue 17162002: Version 3.19.17. (Closed) Base URL: https://v8.googlecode.com/svn/trunk
Patch Set: Created 7 years, 6 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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354 Comment cmnt(masm_, "[ Back edge bookkeeping"); 354 Comment cmnt(masm_, "[ Back edge bookkeeping");
355 // Block literal pools whilst emitting back edge code. 355 // Block literal pools whilst emitting back edge code.
356 Assembler::BlockConstPoolScope block_const_pool(masm_); 356 Assembler::BlockConstPoolScope block_const_pool(masm_);
357 Label ok; 357 Label ok;
358 358
359 int weight = 1; 359 int weight = 1;
360 if (FLAG_weighted_back_edges) { 360 if (FLAG_weighted_back_edges) {
361 ASSERT(back_edge_target->is_bound()); 361 ASSERT(back_edge_target->is_bound());
362 int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target); 362 int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target);
363 weight = Min(kMaxBackEdgeWeight, 363 weight = Min(kMaxBackEdgeWeight,
364 Max(1, distance / kCodeSizeMultiplier)); 364 Max(1, distance / kBackEdgeDistanceUnit));
365 } 365 }
366 EmitProfilingCounterDecrement(weight); 366 EmitProfilingCounterDecrement(weight);
367 __ b(pl, &ok); 367 __ b(pl, &ok);
368 InterruptStub stub; 368 InterruptStub stub;
369 __ CallStub(&stub); 369 __ CallStub(&stub);
370 370
371 // Record a mapping of this PC offset to the OSR id. This is used to find 371 // Record a mapping of this PC offset to the OSR id. This is used to find
372 // the AST id from the unoptimized code in order to use it as a key into 372 // the AST id from the unoptimized code in order to use it as a key into
373 // the deoptimization input data found in the optimized code. 373 // the deoptimization input data found in the optimized code.
374 RecordBackEdge(stmt->OsrEntryId()); 374 RecordBackEdge(stmt->OsrEntryId());
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397 __ CallRuntime(Runtime::kTraceExit, 1); 397 __ CallRuntime(Runtime::kTraceExit, 1);
398 } 398 }
399 if (FLAG_interrupt_at_exit || FLAG_self_optimization) { 399 if (FLAG_interrupt_at_exit || FLAG_self_optimization) {
400 // Pretend that the exit is a backwards jump to the entry. 400 // Pretend that the exit is a backwards jump to the entry.
401 int weight = 1; 401 int weight = 1;
402 if (info_->ShouldSelfOptimize()) { 402 if (info_->ShouldSelfOptimize()) {
403 weight = FLAG_interrupt_budget / FLAG_self_opt_count; 403 weight = FLAG_interrupt_budget / FLAG_self_opt_count;
404 } else if (FLAG_weighted_back_edges) { 404 } else if (FLAG_weighted_back_edges) {
405 int distance = masm_->pc_offset(); 405 int distance = masm_->pc_offset();
406 weight = Min(kMaxBackEdgeWeight, 406 weight = Min(kMaxBackEdgeWeight,
407 Max(1, distance / kCodeSizeMultiplier)); 407 Max(1, distance / kBackEdgeDistanceUnit));
408 } 408 }
409 EmitProfilingCounterDecrement(weight); 409 EmitProfilingCounterDecrement(weight);
410 Label ok; 410 Label ok;
411 __ b(pl, &ok); 411 __ b(pl, &ok);
412 __ push(r0); 412 __ push(r0);
413 if (info_->ShouldSelfOptimize() && FLAG_direct_self_opt) { 413 if (info_->ShouldSelfOptimize() && FLAG_direct_self_opt) {
414 __ ldr(r2, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); 414 __ ldr(r2, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
415 __ push(r2); 415 __ push(r2);
416 __ CallRuntime(Runtime::kOptimizeFunctionOnNextCall, 1); 416 __ CallRuntime(Runtime::kOptimizeFunctionOnNextCall, 1);
417 } else { 417 } else {
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1829 Expression* subexpr = subexprs->at(i); 1829 Expression* subexpr = subexprs->at(i);
1830 // If the subexpression is a literal or a simple materialized literal it 1830 // If the subexpression is a literal or a simple materialized literal it
1831 // is already set in the cloned array. 1831 // is already set in the cloned array.
1832 if (subexpr->AsLiteral() != NULL || 1832 if (subexpr->AsLiteral() != NULL ||
1833 CompileTimeValue::IsCompileTimeValue(subexpr)) { 1833 CompileTimeValue::IsCompileTimeValue(subexpr)) {
1834 continue; 1834 continue;
1835 } 1835 }
1836 1836
1837 if (!result_saved) { 1837 if (!result_saved) {
1838 __ push(r0); 1838 __ push(r0);
1839 __ Push(Smi::FromInt(expr->literal_index()));
1840 result_saved = true; 1839 result_saved = true;
1841 } 1840 }
1842 VisitForAccumulatorValue(subexpr); 1841 VisitForAccumulatorValue(subexpr);
1843 1842
1844 if (IsFastObjectElementsKind(constant_elements_kind)) { 1843 if (IsFastObjectElementsKind(constant_elements_kind)) {
1845 int offset = FixedArray::kHeaderSize + (i * kPointerSize); 1844 int offset = FixedArray::kHeaderSize + (i * kPointerSize);
1846 __ ldr(r6, MemOperand(sp, kPointerSize)); // Copy of array literal. 1845 __ ldr(r6, MemOperand(sp)); // Copy of array literal.
1847 __ ldr(r1, FieldMemOperand(r6, JSObject::kElementsOffset)); 1846 __ ldr(r1, FieldMemOperand(r6, JSObject::kElementsOffset));
1848 __ str(result_register(), FieldMemOperand(r1, offset)); 1847 __ str(result_register(), FieldMemOperand(r1, offset));
1849 // Update the write barrier for the array store. 1848 // Update the write barrier for the array store.
1850 __ RecordWriteField(r1, offset, result_register(), r2, 1849 __ RecordWriteField(r1, offset, result_register(), r2,
1851 kLRHasBeenSaved, kDontSaveFPRegs, 1850 kLRHasBeenSaved, kDontSaveFPRegs,
1852 EMIT_REMEMBERED_SET, INLINE_SMI_CHECK); 1851 EMIT_REMEMBERED_SET, INLINE_SMI_CHECK);
1853 } else { 1852 } else {
1853 __ ldr(r1, MemOperand(sp)); // Copy of array literal.
1854 __ ldr(r2, FieldMemOperand(r1, JSObject::kMapOffset));
1854 __ mov(r3, Operand(Smi::FromInt(i))); 1855 __ mov(r3, Operand(Smi::FromInt(i)));
1856 __ mov(r4, Operand(Smi::FromInt(expr->literal_index())));
1855 StoreArrayLiteralElementStub stub; 1857 StoreArrayLiteralElementStub stub;
1856 __ CallStub(&stub); 1858 __ CallStub(&stub);
1857 } 1859 }
1858 1860
1859 PrepareForBailoutForId(expr->GetIdForElement(i), NO_REGISTERS); 1861 PrepareForBailoutForId(expr->GetIdForElement(i), NO_REGISTERS);
1860 } 1862 }
1861 1863
1862 if (result_saved) { 1864 if (result_saved) {
1863 __ pop(); // literal index
1864 context()->PlugTOS(); 1865 context()->PlugTOS();
1865 } else { 1866 } else {
1866 context()->Plug(r0); 1867 context()->Plug(r0);
1867 } 1868 }
1868 } 1869 }
1869 1870
1870 1871
1871 void FullCodeGenerator::VisitAssignment(Assignment* expr) { 1872 void FullCodeGenerator::VisitAssignment(Assignment* expr) {
1872 Comment cmnt(masm_, "[ Assignment"); 1873 Comment cmnt(masm_, "[ Assignment");
1873 // Invalid left-hand sides are rewritten to have a 'throw ReferenceError' 1874 // Invalid left-hand sides are rewritten to have a 'throw ReferenceError'
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4893 *context_length = 0; 4894 *context_length = 0;
4894 return previous_; 4895 return previous_;
4895 } 4896 }
4896 4897
4897 4898
4898 #undef __ 4899 #undef __
4899 4900
4900 } } // namespace v8::internal 4901 } } // namespace v8::internal
4901 4902
4902 #endif // V8_TARGET_ARCH_ARM 4903 #endif // V8_TARGET_ARCH_ARM
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