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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #include "src/bailout-reason.h" | 7 #include "src/bailout-reason.h" |
8 #include "src/code-stubs.h" | 8 #include "src/code-stubs.h" |
9 #include "src/field-index.h" | 9 #include "src/field-index.h" |
10 #include "src/hydrogen.h" | 10 #include "src/hydrogen.h" |
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1542 template<> | 1542 template<> |
1543 HValue* CodeStubGraphBuilder<FastNewClosureStub>::BuildCodeStub() { | 1543 HValue* CodeStubGraphBuilder<FastNewClosureStub>::BuildCodeStub() { |
1544 Counters* counters = isolate()->counters(); | 1544 Counters* counters = isolate()->counters(); |
1545 Factory* factory = isolate()->factory(); | 1545 Factory* factory = isolate()->factory(); |
1546 HInstruction* empty_fixed_array = | 1546 HInstruction* empty_fixed_array = |
1547 Add<HConstant>(factory->empty_fixed_array()); | 1547 Add<HConstant>(factory->empty_fixed_array()); |
1548 HValue* shared_info = GetParameter(0); | 1548 HValue* shared_info = GetParameter(0); |
1549 | 1549 |
1550 AddIncrementCounter(counters->fast_new_closure_total()); | 1550 AddIncrementCounter(counters->fast_new_closure_total()); |
1551 | 1551 |
1552 // Create a new closure from the given function info in new space | 1552 IfBuilder optimize_now(this); |
1553 HValue* size = Add<HConstant>(JSFunction::kSize); | 1553 HInstruction* compile_hint = Add<HLoadNamedField>( |
1554 HInstruction* js_function = Add<HAllocate>(size, HType::JSObject(), | 1554 shared_info, static_cast<HValue*>(NULL), HObjectAccess::ForCompileHint()); |
1555 NOT_TENURED, JS_FUNCTION_TYPE); | 1555 HValue* hint_mask = Add<HConstant>( |
| 1556 static_cast<int32_t>(1 << SharedFunctionInfo::kOptimizeNextClosure)); |
| 1557 HInstruction* optimize = |
| 1558 AddUncasted<HBitwise>(Token::BIT_AND, compile_hint, hint_mask); |
| 1559 optimize_now.If<HCompareNumericAndBranch>(optimize, hint_mask, Token::EQ); |
| 1560 optimize_now.Then(); |
| 1561 { |
| 1562 Add<HPushArguments>(context(), shared_info, graph()->GetConstantFalse()); |
| 1563 Push(Add<HCallRuntime>(isolate()->factory()->empty_string(), |
| 1564 Runtime::FunctionForId(Runtime::kNewClosure), 3)); |
| 1565 } |
| 1566 optimize_now.Else(); |
| 1567 { |
| 1568 // Create a new closure from the given function info in new space |
| 1569 HValue* size = Add<HConstant>(JSFunction::kSize); |
| 1570 HInstruction* js_function = |
| 1571 Add<HAllocate>(size, HType::JSObject(), NOT_TENURED, JS_FUNCTION_TYPE); |
1556 | 1572 |
1557 int map_index = Context::FunctionMapIndex(casted_stub()->strict_mode(), | 1573 int map_index = Context::FunctionMapIndex(casted_stub()->strict_mode(), |
1558 casted_stub()->kind()); | 1574 casted_stub()->kind()); |
1559 | 1575 |
1560 // Compute the function map in the current native context and set that | 1576 // Compute the function map in the current native context and set that |
1561 // as the map of the allocated object. | 1577 // as the map of the allocated object. |
1562 HInstruction* native_context = BuildGetNativeContext(); | 1578 HInstruction* native_context = BuildGetNativeContext(); |
1563 HInstruction* map_slot_value = Add<HLoadNamedField>( | 1579 HInstruction* map_slot_value = |
1564 native_context, static_cast<HValue*>(NULL), | 1580 Add<HLoadNamedField>(native_context, static_cast<HValue*>(NULL), |
1565 HObjectAccess::ForContextSlot(map_index)); | 1581 HObjectAccess::ForContextSlot(map_index)); |
1566 Add<HStoreNamedField>(js_function, HObjectAccess::ForMap(), map_slot_value); | 1582 Add<HStoreNamedField>(js_function, HObjectAccess::ForMap(), map_slot_value); |
1567 | 1583 |
1568 // Initialize the rest of the function. | 1584 // Initialize the rest of the function. |
1569 Add<HStoreNamedField>(js_function, HObjectAccess::ForPropertiesPointer(), | 1585 Add<HStoreNamedField>(js_function, HObjectAccess::ForPropertiesPointer(), |
1570 empty_fixed_array); | 1586 empty_fixed_array); |
1571 Add<HStoreNamedField>(js_function, HObjectAccess::ForElementsPointer(), | 1587 Add<HStoreNamedField>(js_function, HObjectAccess::ForElementsPointer(), |
1572 empty_fixed_array); | 1588 empty_fixed_array); |
1573 Add<HStoreNamedField>(js_function, HObjectAccess::ForLiteralsPointer(), | 1589 Add<HStoreNamedField>(js_function, HObjectAccess::ForLiteralsPointer(), |
1574 empty_fixed_array); | 1590 empty_fixed_array); |
1575 Add<HStoreNamedField>(js_function, HObjectAccess::ForPrototypeOrInitialMap(), | 1591 Add<HStoreNamedField>(js_function, |
1576 graph()->GetConstantHole()); | 1592 HObjectAccess::ForPrototypeOrInitialMap(), |
1577 Add<HStoreNamedField>(js_function, | 1593 graph()->GetConstantHole()); |
1578 HObjectAccess::ForSharedFunctionInfoPointer(), | 1594 Add<HStoreNamedField>(js_function, |
1579 shared_info); | 1595 HObjectAccess::ForSharedFunctionInfoPointer(), |
1580 Add<HStoreNamedField>(js_function, HObjectAccess::ForFunctionContextPointer(), | 1596 shared_info); |
1581 context()); | 1597 Add<HStoreNamedField>( |
| 1598 js_function, HObjectAccess::ForFunctionContextPointer(), context()); |
1582 | 1599 |
1583 // Initialize the code pointer in the function to be the one | 1600 // Initialize the code pointer in the function to be the one |
1584 // found in the shared function info object. | 1601 // found in the shared function info object. |
1585 // But first check if there is an optimized version for our context. | 1602 // But first check if there is an optimized version for our context. |
1586 if (FLAG_cache_optimized_code) { | 1603 if (FLAG_cache_optimized_code) { |
1587 BuildInstallFromOptimizedCodeMap(js_function, shared_info, native_context); | 1604 BuildInstallFromOptimizedCodeMap(js_function, shared_info, |
1588 } else { | 1605 native_context); |
1589 BuildInstallCode(js_function, shared_info); | 1606 } else { |
| 1607 BuildInstallCode(js_function, shared_info); |
| 1608 } |
| 1609 Push(js_function); |
1590 } | 1610 } |
1591 | 1611 optimize_now.End(); |
1592 return js_function; | 1612 return Pop(); |
1593 } | 1613 } |
1594 | 1614 |
1595 | 1615 |
1596 Handle<Code> FastNewClosureStub::GenerateCode() { | 1616 Handle<Code> FastNewClosureStub::GenerateCode() { |
1597 return DoGenerateCode(this); | 1617 return DoGenerateCode(this); |
1598 } | 1618 } |
1599 | 1619 |
1600 | 1620 |
1601 template<> | 1621 template<> |
1602 HValue* CodeStubGraphBuilder<FastNewContextStub>::BuildCodeStub() { | 1622 HValue* CodeStubGraphBuilder<FastNewContextStub>::BuildCodeStub() { |
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2035 | 2055 |
2036 // Probe the stub cache. | 2056 // Probe the stub cache. |
2037 Code::Flags flags = Code::RemoveTypeAndHolderFromFlags( | 2057 Code::Flags flags = Code::RemoveTypeAndHolderFromFlags( |
2038 Code::ComputeHandlerFlags(Code::LOAD_IC)); | 2058 Code::ComputeHandlerFlags(Code::LOAD_IC)); |
2039 Add<HTailCallThroughMegamorphicCache>(receiver, name, flags); | 2059 Add<HTailCallThroughMegamorphicCache>(receiver, name, flags); |
2040 | 2060 |
2041 // We never continue. | 2061 // We never continue. |
2042 return graph()->GetConstant0(); | 2062 return graph()->GetConstant0(); |
2043 } | 2063 } |
2044 } } // namespace v8::internal | 2064 } } // namespace v8::internal |
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