#ifndef GetByIdStatus_h
#define GetByIdStatus_h
#include "CallLinkStatus.h"
#include "CodeOrigin.h"
#include "ConcurrentJITLock.h"
#include "ExitingJITType.h"
#include "GetByIdVariant.h"
namespace JSC {
class CodeBlock;
class StructureStubInfo;
typedef HashMap<CodeOrigin, StructureStubInfo*, CodeOriginApproximateHash> StubInfoMap;
class GetByIdStatus {
public:
enum State {
NoInformation, Simple, TakesSlowPath, MakesCalls };
GetByIdStatus()
: m_state(NoInformation)
{
}
explicit GetByIdStatus(State state)
: m_state(state)
{
ASSERT(state == NoInformation || state == TakesSlowPath || state == MakesCalls);
}
GetByIdStatus(
State state, bool wasSeenInJIT, const GetByIdVariant& variant = GetByIdVariant())
: m_state(state)
, m_wasSeenInJIT(wasSeenInJIT)
{
ASSERT((state == Simple) == variant.isSet());
m_variants.append(variant);
}
static GetByIdStatus computeFor(CodeBlock*, StubInfoMap&, unsigned bytecodeIndex, UniquedStringImpl* uid);
static GetByIdStatus computeFor(const StructureSet&, UniquedStringImpl* uid);
static GetByIdStatus computeFor(CodeBlock* baselineBlock, CodeBlock* dfgBlock, StubInfoMap& baselineMap, StubInfoMap& dfgMap, CodeOrigin, UniquedStringImpl* uid);
#if ENABLE(DFG_JIT)
static GetByIdStatus computeForStubInfo(const ConcurrentJITLocker&, CodeBlock* baselineBlock, StructureStubInfo*, CodeOrigin, UniquedStringImpl* uid);
#endif
State state() const { return m_state; }
bool isSet() const { return m_state != NoInformation; }
bool operator!() const { return !isSet(); }
bool isSimple() const { return m_state == Simple; }
size_t numVariants() const { return m_variants.size(); }
const Vector<GetByIdVariant, 1>& variants() const { return m_variants; }
const GetByIdVariant& at(size_t index) const { return m_variants[index]; }
const GetByIdVariant& operator[](size_t index) const { return at(index); }
bool takesSlowPath() const { return m_state == TakesSlowPath || m_state == MakesCalls; }
bool makesCalls() const;
bool wasSeenInJIT() const { return m_wasSeenInJIT; }
void filter(const StructureSet&);
void dump(PrintStream&) const;
private:
#if ENABLE(DFG_JIT)
static bool hasExitSite(const ConcurrentJITLocker&, CodeBlock*, unsigned bytecodeIndex);
#endif
#if ENABLE(JIT)
static GetByIdStatus computeForStubInfoWithoutExitSiteFeedback(
const ConcurrentJITLocker&, CodeBlock* profiledBlock, StructureStubInfo*,
UniquedStringImpl* uid, CallLinkStatus::ExitSiteData);
#endif
static GetByIdStatus computeFromLLInt(CodeBlock*, unsigned bytecodeIndex, UniquedStringImpl* uid);
bool appendVariant(const GetByIdVariant&);
State m_state;
Vector<GetByIdVariant, 1> m_variants;
bool m_wasSeenInJIT;
};
}
#endif // PropertyAccessStatus_h