| /* |
| * Copyright (C) 2011 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef DFGValueSource_h |
| #define DFGValueSource_h |
| |
| #include <wtf/Platform.h> |
| |
| #if ENABLE(DFG_JIT) |
| |
| #include "DFGCommon.h" |
| #include "DataFormat.h" |
| #include "SpeculatedType.h" |
| #include "ValueRecovery.h" |
| |
| namespace JSC { namespace DFG { |
| |
| enum ValueSourceKind { |
| SourceNotSet, |
| ValueInJSStack, |
| Int32InJSStack, |
| CellInJSStack, |
| BooleanInJSStack, |
| DoubleInJSStack, |
| ArgumentsSource, |
| SourceIsDead, |
| HaveNode |
| }; |
| |
| static inline ValueSourceKind dataFormatToValueSourceKind(DataFormat dataFormat) |
| { |
| switch (dataFormat) { |
| case DataFormatInteger: |
| return Int32InJSStack; |
| case DataFormatDouble: |
| return DoubleInJSStack; |
| case DataFormatBoolean: |
| return BooleanInJSStack; |
| case DataFormatCell: |
| return CellInJSStack; |
| case DataFormatDead: |
| return SourceIsDead; |
| case DataFormatArguments: |
| return ArgumentsSource; |
| default: |
| ASSERT(dataFormat & DataFormatJS); |
| return ValueInJSStack; |
| } |
| } |
| |
| static inline DataFormat valueSourceKindToDataFormat(ValueSourceKind kind) |
| { |
| switch (kind) { |
| case ValueInJSStack: |
| return DataFormatJS; |
| case Int32InJSStack: |
| return DataFormatInteger; |
| case CellInJSStack: |
| return DataFormatCell; |
| case BooleanInJSStack: |
| return DataFormatBoolean; |
| case DoubleInJSStack: |
| return DataFormatDouble; |
| case ArgumentsSource: |
| return DataFormatArguments; |
| case SourceIsDead: |
| return DataFormatDead; |
| default: |
| return DataFormatNone; |
| } |
| } |
| |
| static inline bool isInJSStack(ValueSourceKind kind) |
| { |
| DataFormat format = valueSourceKindToDataFormat(kind); |
| return format != DataFormatNone && format < DataFormatOSRMarker; |
| } |
| |
| // Can this value be recovered without having to look at register allocation state or |
| // DFG node liveness? |
| static inline bool isTriviallyRecoverable(ValueSourceKind kind) |
| { |
| return valueSourceKindToDataFormat(kind) != DataFormatNone; |
| } |
| |
| class ValueSource { |
| public: |
| ValueSource() |
| : m_nodeIndex(nodeIndexFromKind(SourceNotSet)) |
| { |
| } |
| |
| explicit ValueSource(ValueSourceKind valueSourceKind) |
| : m_nodeIndex(nodeIndexFromKind(valueSourceKind)) |
| { |
| ASSERT(kind() != SourceNotSet); |
| ASSERT(kind() != HaveNode); |
| } |
| |
| explicit ValueSource(NodeIndex nodeIndex) |
| : m_nodeIndex(nodeIndex) |
| { |
| ASSERT(nodeIndex != NoNode); |
| ASSERT(kind() == HaveNode); |
| } |
| |
| static ValueSource forSpeculation(SpeculatedType prediction) |
| { |
| if (isInt32Speculation(prediction)) |
| return ValueSource(Int32InJSStack); |
| if (isArraySpeculation(prediction) || isCellSpeculation(prediction)) |
| return ValueSource(CellInJSStack); |
| if (isBooleanSpeculation(prediction)) |
| return ValueSource(BooleanInJSStack); |
| return ValueSource(ValueInJSStack); |
| } |
| |
| static ValueSource forDataFormat(DataFormat dataFormat) |
| { |
| return ValueSource(dataFormatToValueSourceKind(dataFormat)); |
| } |
| |
| bool isSet() const |
| { |
| return kindFromNodeIndex(m_nodeIndex) != SourceNotSet; |
| } |
| |
| ValueSourceKind kind() const |
| { |
| return kindFromNodeIndex(m_nodeIndex); |
| } |
| |
| bool isInJSStack() const { return JSC::DFG::isInJSStack(kind()); } |
| bool isTriviallyRecoverable() const { return JSC::DFG::isTriviallyRecoverable(kind()); } |
| |
| DataFormat dataFormat() const |
| { |
| return valueSourceKindToDataFormat(kind()); |
| } |
| |
| ValueRecovery valueRecovery() const |
| { |
| ASSERT(isTriviallyRecoverable()); |
| switch (kind()) { |
| case ValueInJSStack: |
| return ValueRecovery::alreadyInJSStack(); |
| |
| case Int32InJSStack: |
| return ValueRecovery::alreadyInJSStackAsUnboxedInt32(); |
| |
| case CellInJSStack: |
| return ValueRecovery::alreadyInJSStackAsUnboxedCell(); |
| |
| case BooleanInJSStack: |
| return ValueRecovery::alreadyInJSStackAsUnboxedBoolean(); |
| |
| case DoubleInJSStack: |
| return ValueRecovery::alreadyInJSStackAsUnboxedDouble(); |
| |
| case SourceIsDead: |
| return ValueRecovery::constant(jsUndefined()); |
| |
| case ArgumentsSource: |
| return ValueRecovery::argumentsThatWereNotCreated(); |
| |
| default: |
| ASSERT_NOT_REACHED(); |
| return ValueRecovery(); |
| } |
| } |
| |
| NodeIndex nodeIndex() const |
| { |
| ASSERT(kind() == HaveNode); |
| return m_nodeIndex; |
| } |
| |
| void dump(FILE* out) const; |
| |
| private: |
| static NodeIndex nodeIndexFromKind(ValueSourceKind kind) |
| { |
| ASSERT(kind >= SourceNotSet && kind < HaveNode); |
| return NoNode - kind; |
| } |
| |
| static ValueSourceKind kindFromNodeIndex(NodeIndex nodeIndex) |
| { |
| unsigned kind = static_cast<unsigned>(NoNode - nodeIndex); |
| if (kind >= static_cast<unsigned>(HaveNode)) |
| return HaveNode; |
| return static_cast<ValueSourceKind>(kind); |
| } |
| |
| NodeIndex m_nodeIndex; |
| }; |
| |
| } } // namespace JSC::DFG |
| |
| #endif // ENABLE(DFG_JIT) |
| |
| #endif // DFGValueSource_h |
| |