| /* |
| * Copyright (C) 2011, 2012 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. |
| * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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. |
| */ |
| |
| #include "config.h" |
| #include "SpeculatedType.h" |
| |
| #include "Arguments.h" |
| #include "JSArray.h" |
| #include "JSFunction.h" |
| #include "ValueProfile.h" |
| #include <wtf/BoundsCheckedPointer.h> |
| |
| namespace JSC { |
| |
| const char* speculationToString(SpeculatedType value) |
| { |
| if (value == SpecNone) |
| return "None"; |
| |
| static const int size = 256; |
| static char description[size]; |
| BoundsCheckedPointer<char> ptr(description, size); |
| |
| bool isTop = true; |
| |
| if (value & SpecCellOther) |
| ptr.strcat("Othercell"); |
| else |
| isTop = false; |
| |
| if (value & SpecObjectOther) |
| ptr.strcat("Otherobj"); |
| else |
| isTop = false; |
| |
| if (value & SpecFinalObject) |
| ptr.strcat("Final"); |
| else |
| isTop = false; |
| |
| if (value & SpecArray) |
| ptr.strcat("Array"); |
| else |
| isTop = false; |
| |
| if (value & SpecInt8Array) |
| ptr.strcat("Int8array"); |
| else |
| isTop = false; |
| |
| if (value & SpecInt16Array) |
| ptr.strcat("Int16array"); |
| else |
| isTop = false; |
| |
| if (value & SpecInt32Array) |
| ptr.strcat("Int32array"); |
| else |
| isTop = false; |
| |
| if (value & SpecUint8Array) |
| ptr.strcat("Uint8array"); |
| else |
| isTop = false; |
| |
| if (value & SpecUint8ClampedArray) |
| ptr.strcat("Uint8clampedarray"); |
| else |
| isTop = false; |
| |
| if (value & SpecUint16Array) |
| ptr.strcat("Uint16array"); |
| else |
| isTop = false; |
| |
| if (value & SpecUint32Array) |
| ptr.strcat("Uint32array"); |
| else |
| isTop = false; |
| |
| if (value & SpecFloat32Array) |
| ptr.strcat("Float32array"); |
| else |
| isTop = false; |
| |
| if (value & SpecFloat64Array) |
| ptr.strcat("Float64array"); |
| else |
| isTop = false; |
| |
| if (value & SpecFunction) |
| ptr.strcat("Function"); |
| else |
| isTop = false; |
| |
| if (value & SpecMyArguments) |
| ptr.strcat("Myarguments"); |
| else |
| isTop = false; |
| |
| if (value & SpecForeignArguments) |
| ptr.strcat("Foreignarguments"); |
| else |
| isTop = false; |
| |
| if (value & SpecString) |
| ptr.strcat("String"); |
| else |
| isTop = false; |
| |
| if (value & SpecInt32) |
| ptr.strcat("Int"); |
| else |
| isTop = false; |
| |
| if (value & SpecDoubleReal) |
| ptr.strcat("Doublereal"); |
| else |
| isTop = false; |
| |
| if (value & SpecDoubleNaN) |
| ptr.strcat("Doublenan"); |
| else |
| isTop = false; |
| |
| if (value & SpecBoolean) |
| ptr.strcat("Bool"); |
| else |
| isTop = false; |
| |
| if (value & SpecOther) |
| ptr.strcat("Other"); |
| else |
| isTop = false; |
| |
| if (isTop) { |
| ptr = description; |
| ptr.strcat("Top"); |
| } |
| |
| if (value & SpecEmpty) |
| ptr.strcat("Empty"); |
| |
| *ptr++ = 0; |
| |
| return description; |
| } |
| |
| const char* speculationToAbbreviatedString(SpeculatedType prediction) |
| { |
| if (isFinalObjectSpeculation(prediction)) |
| return "<Final>"; |
| if (isArraySpeculation(prediction)) |
| return "<Array>"; |
| if (isStringSpeculation(prediction)) |
| return "<String>"; |
| if (isFunctionSpeculation(prediction)) |
| return "<Function>"; |
| if (isInt8ArraySpeculation(prediction)) |
| return "<Int8array>"; |
| if (isInt16ArraySpeculation(prediction)) |
| return "<Int16array>"; |
| if (isInt32ArraySpeculation(prediction)) |
| return "<Int32array>"; |
| if (isUint8ArraySpeculation(prediction)) |
| return "<Uint8array>"; |
| if (isUint16ArraySpeculation(prediction)) |
| return "<Uint16array>"; |
| if (isUint32ArraySpeculation(prediction)) |
| return "<Uint32array>"; |
| if (isFloat32ArraySpeculation(prediction)) |
| return "<Float32array>"; |
| if (isFloat64ArraySpeculation(prediction)) |
| return "<Float64array>"; |
| if (isMyArgumentsSpeculation(prediction)) |
| return "<Myarguments>"; |
| if (isArgumentsSpeculation(prediction)) |
| return "<Arguments>"; |
| if (isObjectSpeculation(prediction)) |
| return "<Object>"; |
| if (isCellSpeculation(prediction)) |
| return "<Cell>"; |
| if (isInt32Speculation(prediction)) |
| return "<Int32>"; |
| if (isDoubleSpeculation(prediction)) |
| return "<Double>"; |
| if (isNumberSpeculation(prediction)) |
| return "<Number>"; |
| if (isBooleanSpeculation(prediction)) |
| return "<Boolean>"; |
| if (isOtherSpeculation(prediction)) |
| return "<Other>"; |
| return ""; |
| } |
| |
| SpeculatedType speculationFromClassInfo(const ClassInfo* classInfo) |
| { |
| if (classInfo == &JSFinalObject::s_info) |
| return SpecFinalObject; |
| |
| if (classInfo == &JSArray::s_info) |
| return SpecArray; |
| |
| if (classInfo == &Arguments::s_info) |
| return SpecArguments; // Cannot distinguish between MyArguments and ForeignArguments at this stage. That happens in the flow analysis. |
| |
| if (classInfo->isSubClassOf(&JSFunction::s_info)) |
| return SpecFunction; |
| |
| |
| if (classInfo->typedArrayStorageType != TypedArrayNone) { |
| switch (classInfo->typedArrayStorageType) { |
| case TypedArrayInt8: |
| return SpecInt8Array; |
| case TypedArrayInt16: |
| return SpecInt16Array; |
| case TypedArrayInt32: |
| return SpecInt32Array; |
| case TypedArrayUint8: |
| return SpecUint8Array; |
| case TypedArrayUint8Clamped: |
| return SpecUint8ClampedArray; |
| case TypedArrayUint16: |
| return SpecUint16Array; |
| case TypedArrayUint32: |
| return SpecUint32Array; |
| case TypedArrayFloat32: |
| return SpecFloat32Array; |
| case TypedArrayFloat64: |
| return SpecFloat64Array; |
| default: |
| break; |
| } |
| } |
| |
| if (classInfo->isSubClassOf(&JSObject::s_info)) |
| return SpecObjectOther; |
| |
| return SpecCellOther; |
| } |
| |
| SpeculatedType speculationFromStructure(Structure* structure) |
| { |
| if (structure->typeInfo().type() == StringType) |
| return SpecString; |
| return speculationFromClassInfo(structure->classInfo()); |
| } |
| |
| SpeculatedType speculationFromCell(JSCell* cell) |
| { |
| return speculationFromStructure(cell->structure()); |
| } |
| |
| SpeculatedType speculationFromValue(JSValue value) |
| { |
| if (value.isEmpty()) |
| return SpecEmpty; |
| if (value.isInt32()) |
| return SpecInt32; |
| if (value.isDouble()) { |
| double number = value.asNumber(); |
| if (number == number) |
| return SpecDoubleReal; |
| return SpecDoubleNaN; |
| } |
| if (value.isCell()) |
| return speculationFromCell(value.asCell()); |
| if (value.isBoolean()) |
| return SpecBoolean; |
| ASSERT(value.isUndefinedOrNull()); |
| return SpecOther; |
| } |
| |
| } // namespace JSC |
| |
