#pragma once
#include "CacheableIdentifier.h"
#include "CallLinkStatus.h"
#include "CodeOrigin.h"
#include "ConcurrentJSLock.h"
#include "DeleteByIdVariant.h"
#include "ExitFlag.h"
#include "ICStatusMap.h"
#include "StubInfoSummary.h"
namespace JSC {
class AccessCase;
class CodeBlock;
class StructureStubInfo;
class DeleteByStatus final {
WTF_MAKE_FAST_ALLOCATED;
public:
enum State : uint8_t {
NoInformation,
Simple,
LikelyTakesSlowPath,
ObservedTakesSlowPath,
};
DeleteByStatus()
: m_state(NoInformation)
{
}
explicit DeleteByStatus(State state)
: m_state(state)
{
ASSERT(state != Simple);
}
static DeleteByStatus computeFor(CodeBlock* baselineBlock, ICStatusMap& baselineMap, ICStatusContextStack& dfgContextStack, CodeOrigin);
State state() const { return m_state; }
bool isSet() const { return m_state != NoInformation; }
bool operator!() const { return !isSet(); }
bool observedSlowPath() const { return m_state == ObservedTakesSlowPath; }
bool isSimple() const { return m_state == Simple; }
const Vector<DeleteByIdVariant, 1>& variants() { return m_variants; }
CacheableIdentifier singleIdentifier() const;
DeleteByStatus slowVersion() const;
void filter(const StructureSet&);
void visitAggregate(SlotVisitor&);
void markIfCheap(SlotVisitor&);
bool finalize(VM&);
bool appendVariant(const DeleteByIdVariant&);
void dump(PrintStream&) const;
private:
explicit DeleteByStatus(StubInfoSummary, StructureStubInfo&);
void merge(const DeleteByStatus&);
static DeleteByStatus computeForBaseline(CodeBlock*, ICStatusMap&, BytecodeIndex, ExitFlag);
#if ENABLE(JIT)
static DeleteByStatus computeForStubInfoWithoutExitSiteFeedback(
const ConcurrentJSLocker&, CodeBlock* profiledBlock, StructureStubInfo*);
#endif
Vector<DeleteByIdVariant, 1> m_variants;
State m_state;
};
}