#pragma once
#include "CacheableIdentifier.h"
#include "CallLinkStatus.h"
#include "CodeOrigin.h"
#include "ConcurrentJSLock.h"
#include "ExitFlag.h"
#include "GetByIdVariant.h"
#include "ICStatusMap.h"
#include "ScopeOffset.h"
#include "StubInfoSummary.h"
namespace JSC {
class AccessCase;
class CodeBlock;
class JSModuleEnvironment;
class JSModuleNamespaceObject;
class ModuleNamespaceAccessCase;
class StructureStubInfo;
class GetByStatus final {
WTF_MAKE_FAST_ALLOCATED;
public:
enum State : uint8_t {
NoInformation,
Simple,
Custom,
ModuleNamespace,
LikelyTakesSlowPath,
ObservedTakesSlowPath,
MakesCalls,
ObservedSlowPathAndMakesCalls ,
};
GetByStatus()
: m_state(NoInformation)
{
}
explicit GetByStatus(State state)
: m_state(state)
{
ASSERT(state == NoInformation || state == LikelyTakesSlowPath || state == ObservedTakesSlowPath || state == MakesCalls || state == ObservedSlowPathAndMakesCalls);
}
explicit GetByStatus(StubInfoSummary, StructureStubInfo&);
GetByStatus(
State state, bool wasSeenInJIT)
: m_state(state)
, m_wasSeenInJIT(wasSeenInJIT)
{
}
static GetByStatus computeFor(CodeBlock* baselineBlock, ICStatusMap& baselineMap, ICStatusContextStack& dfgContextStack, CodeOrigin);
static GetByStatus computeFor(const StructureSet&, UniquedStringImpl*);
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; }
bool isCustom() const { return m_state == Custom; }
bool isModuleNamespace() const { return m_state == ModuleNamespace; }
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 == LikelyTakesSlowPath || m_state == ObservedTakesSlowPath || m_state == MakesCalls || m_state == ObservedSlowPathAndMakesCalls || m_state == Custom || m_state == ModuleNamespace; }
bool observedStructureStubInfoSlowPath() const { return m_state == ObservedTakesSlowPath || m_state == ObservedSlowPathAndMakesCalls; }
bool makesCalls() const;
GetByStatus slowVersion() const;
bool wasSeenInJIT() const { return m_wasSeenInJIT; }
void filter(const StructureSet&);
JSModuleNamespaceObject* moduleNamespaceObject() const { return m_moduleNamespaceData->m_moduleNamespaceObject; }
JSModuleEnvironment* moduleEnvironment() const { return m_moduleNamespaceData->m_moduleEnvironment; }
ScopeOffset scopeOffset() const { return m_moduleNamespaceData->m_scopeOffset; }
void visitAggregate(SlotVisitor&);
void markIfCheap(SlotVisitor&);
bool finalize(VM&);
bool appendVariant(const GetByIdVariant&);
void dump(PrintStream&) const;
CacheableIdentifier singleIdentifier() const;
private:
void merge(const GetByStatus&);
#if ENABLE(JIT)
GetByStatus(const ModuleNamespaceAccessCase&);
static GetByStatus computeForStubInfoWithoutExitSiteFeedback(
const ConcurrentJSLocker&, CodeBlock* profiledBlock, StructureStubInfo*, CallLinkStatus::ExitSiteData);
#endif
static GetByStatus computeFromLLInt(CodeBlock*, BytecodeIndex);
static GetByStatus computeFor(CodeBlock*, ICStatusMap&, BytecodeIndex, ExitFlag, CallLinkStatus::ExitSiteData);
struct ModuleNamespaceData {
JSModuleNamespaceObject* m_moduleNamespaceObject { nullptr };
JSModuleEnvironment* m_moduleEnvironment { nullptr };
ScopeOffset m_scopeOffset { };
CacheableIdentifier m_identifier;
};
Vector<GetByIdVariant, 1> m_variants;
Box<ModuleNamespaceData> m_moduleNamespaceData;
State m_state;
bool m_wasSeenInJIT { false };
};
}