#pragma once
#include "CallLinkStatus.h"
#include "CodeOrigin.h"
#include "ConcurrentJSLock.h"
#include "InByIdVariant.h"
namespace JSC {
class AccessCase;
class CodeBlock;
class StructureStubInfo;
typedef HashMap<CodeOrigin, StructureStubInfo*, CodeOriginApproximateHash> StubInfoMap;
class InByIdStatus {
public:
enum State {
NoInformation,
Simple,
TakesSlowPath,
};
InByIdStatus() = default;
InByIdStatus(State state, const InByIdVariant& variant = InByIdVariant())
: m_state(state)
{
ASSERT((state == Simple) == variant.isSet());
m_variants.append(variant);
}
static InByIdStatus computeFor(CodeBlock*, StubInfoMap&, unsigned bytecodeIndex, UniquedStringImpl* uid);
static InByIdStatus computeFor(CodeBlock* baselineBlock, CodeBlock* dfgBlock, StubInfoMap& baselineMap, StubInfoMap& dfgMap, CodeOrigin, UniquedStringImpl* uid);
#if ENABLE(DFG_JIT)
static InByIdStatus computeForStubInfo(const ConcurrentJSLocker&, CodeBlock* baselineBlock, StructureStubInfo*, CodeOrigin, UniquedStringImpl* uid);
#endif
State state() const { return m_state; }
bool isSet() const { return m_state != NoInformation; }
explicit operator bool() const { return isSet(); }
bool isSimple() const { return m_state == Simple; }
size_t numVariants() const { return m_variants.size(); }
const Vector<InByIdVariant, 1>& variants() const { return m_variants; }
const InByIdVariant& at(size_t index) const { return m_variants[index]; }
const InByIdVariant& operator[](size_t index) const { return at(index); }
bool takesSlowPath() const { return m_state == TakesSlowPath; }
void filter(const StructureSet&);
void dump(PrintStream&) const;
private:
#if ENABLE(DFG_JIT)
static bool hasExitSite(CodeBlock*, unsigned bytecodeIndex);
static InByIdStatus computeForStubInfoWithoutExitSiteFeedback(const ConcurrentJSLocker&, StructureStubInfo*, UniquedStringImpl* uid);
#endif
bool appendVariant(const InByIdVariant&);
State m_state { NoInformation };
Vector<InByIdVariant, 1> m_variants;
};
}