#pragma once
#include "CallLinkStatus.h"
#include "ExitFlag.h"
#include "ICStatusMap.h"
#include "PutByIdVariant.h"
#include "StubInfoSummary.h"
namespace JSC {
class CodeBlock;
class VM;
class JSGlobalObject;
class Structure;
class StructureChain;
class StructureStubInfo;
typedef HashMap<CodeOrigin, StructureStubInfo*, CodeOriginApproximateHash> StubInfoMap;
class PutByIdStatus {
public:
enum State {
NoInformation,
Simple,
TakesSlowPath,
MakesCalls
};
PutByIdStatus()
: m_state(NoInformation)
{
}
explicit PutByIdStatus(State state)
: m_state(state)
{
ASSERT(m_state == NoInformation || m_state == TakesSlowPath || m_state == MakesCalls);
}
explicit PutByIdStatus(StubInfoSummary summary)
{
switch (summary) {
case StubInfoSummary::NoInformation:
m_state = NoInformation;
return;
case StubInfoSummary::Simple:
case StubInfoSummary::MakesCalls:
RELEASE_ASSERT_NOT_REACHED();
return;
case StubInfoSummary::TakesSlowPath:
m_state = TakesSlowPath;
return;
case StubInfoSummary::TakesSlowPathAndMakesCalls:
m_state = MakesCalls;
return;
}
RELEASE_ASSERT_NOT_REACHED();
}
PutByIdStatus(const PutByIdVariant& variant)
: m_state(Simple)
{
m_variants.append(variant);
}
static PutByIdStatus computeFor(CodeBlock*, ICStatusMap&, unsigned bytecodeIndex, UniquedStringImpl* uid, ExitFlag, CallLinkStatus::ExitSiteData);
static PutByIdStatus computeFor(JSGlobalObject*, const StructureSet&, UniquedStringImpl* uid, bool isDirect);
static PutByIdStatus computeFor(CodeBlock* baselineBlock, ICStatusMap& baselineMap, ICStatusContextStack& contextStack, CodeOrigin, UniquedStringImpl* uid);
#if ENABLE(JIT)
static PutByIdStatus computeForStubInfo(const ConcurrentJSLocker&, CodeBlock* baselineBlock, StructureStubInfo*, CodeOrigin, UniquedStringImpl* uid);
#endif
State state() const { return m_state; }
bool isSet() const { return m_state != NoInformation; }
bool operator!() const { return m_state == NoInformation; }
bool isSimple() const { return m_state == Simple; }
bool takesSlowPath() const { return m_state == TakesSlowPath || m_state == MakesCalls; }
bool makesCalls() const;
PutByIdStatus slowVersion() const;
size_t numVariants() const { return m_variants.size(); }
const Vector<PutByIdVariant, 1>& variants() const { return m_variants; }
const PutByIdVariant& at(size_t index) const { return m_variants[index]; }
const PutByIdVariant& operator[](size_t index) const { return at(index); }
void markIfCheap(SlotVisitor&);
bool finalize();
void merge(const PutByIdStatus&);
void filter(const StructureSet&);
void dump(PrintStream&) const;
private:
#if ENABLE(JIT)
static PutByIdStatus computeForStubInfo(
const ConcurrentJSLocker&, CodeBlock*, StructureStubInfo*, UniquedStringImpl* uid,
CallLinkStatus::ExitSiteData);
#endif
static PutByIdStatus computeFromLLInt(CodeBlock*, unsigned bytecodeIndex, UniquedStringImpl* uid);
bool appendVariant(const PutByIdVariant&);
State m_state;
Vector<PutByIdVariant, 1> m_variants;
};
}