#ifndef CallLinkStatus_h
#define CallLinkStatus_h
#include "CallLinkInfo.h"
#include "CallVariant.h"
#include "CodeOrigin.h"
#include "CodeSpecializationKind.h"
#include "ConcurrentJITLock.h"
#include "ExitingJITType.h"
#include "Intrinsic.h"
#include "JSCJSValue.h"
namespace JSC {
class CodeBlock;
class ExecutableBase;
class InternalFunction;
class JSFunction;
class Structure;
class CallLinkInfo;
class CallLinkStatus {
WTF_MAKE_FAST_ALLOCATED;
public:
CallLinkStatus()
{
}
static CallLinkStatus takesSlowPath()
{
CallLinkStatus result;
result.m_couldTakeSlowPath = true;
return result;
}
explicit CallLinkStatus(JSValue);
CallLinkStatus(CallVariant variant)
: m_variants(1, variant)
{
}
static CallLinkStatus computeFor(
CodeBlock*, unsigned bytecodeIndex, const CallLinkInfoMap&);
struct ExitSiteData {
bool takesSlowPath { false };
bool badFunction { false };
};
static ExitSiteData computeExitSiteData(const ConcurrentJITLocker&, CodeBlock*, unsigned bytecodeIndex);
#if ENABLE(JIT)
static CallLinkStatus computeFor(const ConcurrentJITLocker&, CodeBlock*, CallLinkInfo&);
static CallLinkStatus computeFor(
const ConcurrentJITLocker&, CodeBlock*, CallLinkInfo&, ExitSiteData);
#endif
typedef HashMap<CodeOrigin, CallLinkStatus, CodeOriginApproximateHash> ContextMap;
static void computeDFGStatuses(CodeBlock* dfgCodeBlock, ContextMap&);
static CallLinkStatus computeFor(
CodeBlock*, CodeOrigin, const CallLinkInfoMap&, const ContextMap&);
void setProvenConstantCallee(CallVariant);
bool isSet() const { return !m_variants.isEmpty() || m_couldTakeSlowPath; }
bool operator!() const { return !isSet(); }
bool couldTakeSlowPath() const { return m_couldTakeSlowPath; }
void setCouldTakeSlowPath(bool value) { m_couldTakeSlowPath = value; }
CallVariantList variants() const { return m_variants; }
unsigned size() const { return m_variants.size(); }
CallVariant at(unsigned i) const { return m_variants[i]; }
CallVariant operator[](unsigned i) const { return at(i); }
bool isProved() const { return m_isProved; }
bool isBasedOnStub() const { return m_isBasedOnStub; }
bool canOptimize() const { return !m_variants.isEmpty(); }
bool isClosureCall() const;
unsigned maxNumArguments() const { return m_maxNumArguments; }
void dump(PrintStream&) const;
private:
void makeClosureCall();
static CallLinkStatus computeFromLLInt(const ConcurrentJITLocker&, CodeBlock*, unsigned bytecodeIndex);
#if ENABLE(JIT)
static CallLinkStatus computeFromCallLinkInfo(
const ConcurrentJITLocker&, CallLinkInfo&);
#endif
CallVariantList m_variants;
bool m_couldTakeSlowPath { false };
bool m_isProved { false };
bool m_isBasedOnStub { false };
unsigned m_maxNumArguments { 0 };
};
}
#endif // CallLinkStatus_h