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Issue 27802002: Disconnects code objects from infrequently used unoptimized functions. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 7 years, 2 months ago
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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 #include "vm/globals.h" 5 #include "vm/globals.h"
6 #if defined(TARGET_ARCH_IA32) 6 #if defined(TARGET_ARCH_IA32)
7 7
8 #include "vm/assembler.h" 8 #include "vm/assembler.h"
9 #include "vm/compiler.h" 9 #include "vm/compiler.h"
10 #include "vm/dart_entry.h" 10 #include "vm/dart_entry.h"
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1606 const intptr_t target_offset = ICData::TargetIndexFor(num_args) * kWordSize; 1606 const intptr_t target_offset = ICData::TargetIndexFor(num_args) * kWordSize;
1607 const intptr_t count_offset = ICData::CountIndexFor(num_args) * kWordSize; 1607 const intptr_t count_offset = ICData::CountIndexFor(num_args) * kWordSize;
1608 __ movl(EAX, Address(EBX, target_offset)); 1608 __ movl(EAX, Address(EBX, target_offset));
1609 __ addl(Address(EBX, count_offset), Immediate(Smi::RawValue(1))); 1609 __ addl(Address(EBX, count_offset), Immediate(Smi::RawValue(1)));
1610 __ j(NO_OVERFLOW, &call_target_function, Assembler::kNearJump); 1610 __ j(NO_OVERFLOW, &call_target_function, Assembler::kNearJump);
1611 __ movl(Address(EBX, count_offset), 1611 __ movl(Address(EBX, count_offset),
1612 Immediate(Smi::RawValue(Smi::kMaxValue))); 1612 Immediate(Smi::RawValue(Smi::kMaxValue)));
1613 1613
1614 __ Bind(&call_target_function); 1614 __ Bind(&call_target_function);
1615 // EAX: Target function. 1615 // EAX: Target function.
1616 __ movl(EAX, FieldAddress(EAX, Function::code_offset())); 1616 Label is_compiled;
1617 __ movl(EAX, FieldAddress(EAX, Code::instructions_offset())); 1617 __ movl(EBX, FieldAddress(EAX, Function::code_offset()));
1618 if (FLAG_collect_code) {
1619 // If code might be GC'd, then EBX might be null. If it is, recompile.
1620 __ cmpl(EBX, raw_null);
1621 __ j(NOT_EQUAL, &is_compiled, Assembler::kNearJump);
1622 __ EnterStubFrame();
1623 __ pushl(EDX); // Preserve arguments descriptor array.
1624 __ pushl(ECX); // Preserve IC data object.
1625 __ pushl(EAX); // Pass function.
1626 __ CallRuntime(kCompileFunctionRuntimeEntry, 1);
1627 __ popl(EAX); // Restore function.
1628 __ popl(ECX); // Restore IC data array.
1629 __ popl(EDX); // Restore arguments descriptor array.
1630 __ LeaveFrame();
1631 __ movl(EBX, FieldAddress(EAX, Function::code_offset()));
1632 __ Bind(&is_compiled);
1633 }
1634 __ movl(EAX, FieldAddress(EBX, Code::instructions_offset()));
1618 __ addl(EAX, Immediate(Instructions::HeaderSize() - kHeapObjectTag)); 1635 __ addl(EAX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
1619 __ jmp(EAX); 1636 __ jmp(EAX);
1620 1637
1621 // Instance in EAX, return its class-id in EAX as Smi. 1638 // Instance in EAX, return its class-id in EAX as Smi.
1622 __ Bind(&get_class_id_as_smi); 1639 __ Bind(&get_class_id_as_smi);
1623 Label not_smi; 1640 Label not_smi;
1624 // Test if Smi -> load Smi class for comparison. 1641 // Test if Smi -> load Smi class for comparison.
1625 __ testl(EAX, Immediate(kSmiTagMask)); 1642 __ testl(EAX, Immediate(kSmiTagMask));
1626 __ j(NOT_ZERO, &not_smi, Assembler::kNearJump); 1643 __ j(NOT_ZERO, &not_smi, Assembler::kNearJump);
1627 __ movl(EAX, Immediate(Smi::RawValue(kSmiCid))); 1644 __ movl(EAX, Immediate(Smi::RawValue(kSmiCid)));
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2173 GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp); 2190 GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp);
2174 __ popl(temp); 2191 __ popl(temp);
2175 __ popl(right); 2192 __ popl(right);
2176 __ popl(left); 2193 __ popl(left);
2177 __ ret(); 2194 __ ret();
2178 } 2195 }
2179 2196
2180 } // namespace dart 2197 } // namespace dart
2181 2198
2182 #endif // defined TARGET_ARCH_IA32 2199 #endif // defined TARGET_ARCH_IA32
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