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/*
* Copyright (C) 2014-2016 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.
*/
#include "config.h"
#include "DFGDoesGC.h"
#if ENABLE(DFG_JIT)
#include "DFGClobberize.h"
#include "DFGGraph.h"
#include "DFGNode.h"
#include "Operations.h"
namespace JSC { namespace DFG {
bool doesGC(Graph& graph, Node* node)
{
if (clobbersHeap(graph, node))
return true;
// Now consider nodes that don't clobber the world but that still may GC. This includes all
// nodes. By convention we put world-clobbering nodes in the block of "false" cases but we can
// put them anywhere.
switch (node->op()) {
case JSConstant:
case DoubleConstant:
case Int52Constant:
case Identity:
case GetCallee:
case GetArgumentCount:
case GetRestLength:
case GetLocal:
case SetLocal:
case MovHint:
case ZombieHint:
case ExitOK:
case Phantom:
case Upsilon:
case Phi:
case Flush:
case PhantomLocal:
case GetLocalUnlinked:
case SetArgument:
case BitAnd:
case BitOr:
case BitXor:
case BitLShift:
case BitRShift:
case BitURShift:
case ValueToInt32:
case UInt32ToNumber:
case DoubleAsInt32:
case ArithAdd:
case ArithClz32:
case ArithSub:
case ArithNegate:
case ArithMul:
case ArithIMul:
case ArithDiv:
case ArithMod:
case ArithAbs:
case ArithMin:
case ArithMax:
case ArithPow:
case ArithSqrt:
case ArithRandom:
case ArithRound:
case ArithFloor:
case ArithCeil:
case ArithFRound:
case ArithSin:
case ArithCos:
case ArithLog:
case ValueAdd:
case GetById:
case GetByIdFlush:
case PutById:
case PutByIdFlush:
case PutByIdDirect:
case PutGetterById:
case PutSetterById:
case PutGetterSetterById:
case PutGetterByVal:
case PutSetterByVal:
case CheckStructure:
case GetExecutable:
case GetButterfly:
case GetButterflyReadOnly:
case CheckArray:
case GetScope:
case SkipScope:
case GetClosureVar:
case PutClosureVar:
case GetGlobalVar:
case GetGlobalLexicalVariable:
case PutGlobalVariable:
case VarInjectionWatchpoint:
case CheckCell:
case CheckNotEmpty:
case CheckIdent:
case RegExpExec:
case RegExpTest:
case CompareLess:
case CompareLessEq:
case CompareGreater:
case CompareGreaterEq:
case CompareEq:
case CompareStrictEq:
case Call:
case TailCallInlinedCaller:
case Construct:
case CallVarargs:
case TailCallVarargsInlinedCaller:
case ConstructVarargs:
case LoadVarargs:
case CallForwardVarargs:
case ConstructForwardVarargs:
case TailCallForwardVarargs:
case TailCallForwardVarargsInlinedCaller:
case Breakpoint:
case ProfileWillCall:
case ProfileDidCall:
case ProfileType:
case ProfileControlFlow:
case OverridesHasInstance:
case InstanceOf:
case InstanceOfCustom:
case IsUndefined:
case IsBoolean:
case IsNumber:
case IsString:
case IsObject:
case IsObjectOrNull:
case IsFunction:
case TypeOf:
case LogicalNot:
case ToPrimitive:
case ToString:
case CallStringConstructor:
case In:
case Jump:
case Branch:
case Switch:
case Return:
case TailCall:
case TailCallVarargs:
case Throw:
case CountExecution:
case ForceOSRExit:
case CheckWatchdogTimer:
case StringFromCharCode:
case Unreachable:
case ExtractOSREntryLocal:
case CheckTierUpInLoop:
case CheckTierUpAtReturn:
case CheckTierUpAndOSREnter:
case CheckTierUpWithNestedTriggerAndOSREnter:
case LoopHint:
case StoreBarrier:
case InvalidationPoint:
case NotifyWrite:
case CheckInBounds:
case ConstantStoragePointer:
case Check:
case CheckTypeInfoFlags:
case MultiGetByOffset:
case ValueRep:
case DoubleRep:
case Int52Rep:
case GetGetter:
case GetSetter:
case GetByVal:
case GetIndexedPropertyStorage:
case GetArrayLength:
case ArrayPush:
case ArrayPop:
case StringCharAt:
case StringCharCodeAt:
case GetTypedArrayByteOffset:
case PutByValDirect:
case PutByVal:
case PutByValAlias:
case PutStructure:
case GetByOffset:
case GetGetterSetterByOffset:
case PutByOffset:
case GetEnumerableLength:
case HasGenericProperty:
case HasStructureProperty:
case HasIndexedProperty:
case GetDirectPname:
case FiatInt52:
case BooleanToNumber:
case CheckBadCell:
case BottomValue:
case PhantomNewObject:
case PhantomNewFunction:
case PhantomNewGeneratorFunction:
case PhantomCreateActivation:
case PhantomDirectArguments:
case PhantomClonedArguments:
case GetMyArgumentByVal:
case ForwardVarargs:
case PutHint:
case CheckStructureImmediate:
case PutStack:
case KillStack:
case GetStack:
case GetFromArguments:
case PutToArguments:
case CopyRest:
return false;
case CreateActivation:
case CreateDirectArguments:
case CreateScopedArguments:
case CreateClonedArguments:
case ToThis:
case CreateThis:
case AllocatePropertyStorage:
case ReallocatePropertyStorage:
case Arrayify:
case ArrayifyToStructure:
case NewObject:
case NewArray:
case NewArrayWithSize:
case NewArrayBuffer:
case NewRegexp:
case NewStringObject:
case MakeRope:
case NewArrowFunction:
case NewFunction:
case NewGeneratorFunction:
case NewTypedArray:
case ThrowReferenceError:
case GetPropertyEnumerator:
case GetEnumeratorStructurePname:
case GetEnumeratorGenericPname:
case ToIndexString:
case MaterializeNewObject:
case MaterializeCreateActivation:
case StrCat:
case StringReplace:
return true;
case MultiPutByOffset:
return node->multiPutByOffsetData().reallocatesStorage();
case LastNodeType:
RELEASE_ASSERT_NOT_REACHED();
return true;
}
RELEASE_ASSERT_NOT_REACHED();
return true;
}
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
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