#pragma once
#include "CallLinkStatus.h"
#include "PutByIdVariant.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);
}
PutByIdStatus(const PutByIdVariant& variant)
: m_state(Simple)
{
m_variants.append(variant);
}
static PutByIdStatus computeFor(CodeBlock*, StubInfoMap&, unsigned bytecodeIndex, UniquedStringImpl* uid);
static PutByIdStatus computeFor(JSGlobalObject*, const StructureSet&, UniquedStringImpl* uid, bool isDirect);
static PutByIdStatus computeFor(CodeBlock* baselineBlock, CodeBlock* dfgBlock, StubInfoMap& baselineMap, StubInfoMap& dfgMap, 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;
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 dump(PrintStream&) const;
private:
#if ENABLE(DFG_JIT)
static bool hasExitSite(const ConcurrentJSLocker&, CodeBlock*, unsigned bytecodeIndex);
#endif
#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;
};
}