#ifndef FTLLocation_h
#define FTLLocation_h
#if ENABLE(FTL_JIT)
#include "FPRInfo.h"
#include "FTLDWARFRegister.h"
#include "FTLStackMaps.h"
#include "GPRInfo.h"
#include <wtf/HashMap.h>
namespace JSC { namespace FTL {
class Location {
public:
enum Kind {
Unprocessed,
Register,
Indirect,
Constant
};
Location()
: m_kind(Unprocessed)
{
u.constant = 0;
}
Location(WTF::HashTableDeletedValueType)
: m_kind(Unprocessed)
{
u.constant = 1;
}
static Location forRegister(DWARFRegister dwarfReg, int32_t addend)
{
Location result;
result.m_kind = Register;
result.u.variable.dwarfRegNum = dwarfReg.dwarfRegNum();
result.u.variable.offset = addend;
return result;
}
static Location forIndirect(DWARFRegister dwarfReg, int32_t offset)
{
Location result;
result.m_kind = Indirect;
result.u.variable.dwarfRegNum = dwarfReg.dwarfRegNum();
result.u.variable.offset = offset;
return result;
}
static Location forConstant(int64_t constant)
{
Location result;
result.m_kind = Constant;
result.u.constant = constant;
return result;
}
static Location forStackmaps(const StackMaps*, const StackMaps::Location&);
Kind kind() const { return m_kind; }
bool hasDwarfRegNum() const { return kind() == Register || kind() == Indirect; }
int16_t dwarfRegNum() const
{
ASSERT(hasDwarfRegNum());
return u.variable.dwarfRegNum;
}
bool hasDwarfReg() const { return hasDwarfRegNum(); }
DWARFRegister dwarfReg() const { return DWARFRegister(dwarfRegNum()); }
bool hasOffset() const { return kind() == Indirect; }
int32_t offset() const
{
ASSERT(hasOffset());
return u.variable.offset;
}
bool hasAddend() const { return kind() == Register; }
int32_t addend() const
{
ASSERT(hasAddend());
return u.variable.offset;
}
bool hasConstant() const { return kind() == Constant; }
int64_t constant() const
{
ASSERT(hasConstant());
return u.constant;
}
bool operator!() const { return kind() == Unprocessed && !u.variable.offset; }
bool isHashTableDeletedValue() const { return kind() == Unprocessed && u.variable.offset; }
bool operator==(const Location& other) const
{
return m_kind == other.m_kind
&& u.constant == other.u.constant;
}
unsigned hash() const
{
unsigned result = m_kind;
switch (kind()) {
case Unprocessed:
result ^= u.variable.offset;
break;
case Register:
result ^= u.variable.dwarfRegNum;
break;
case Indirect:
result ^= u.variable.dwarfRegNum;
result ^= u.variable.offset;
break;
case Constant:
result ^= WTF::IntHash<int64_t>::hash(u.constant);
break;
}
return WTF::IntHash<unsigned>::hash(result);
}
void dump(PrintStream&) const;
bool isGPR() const;
bool involvesGPR() const;
GPRReg gpr() const;
GPRReg directGPR() const;
bool isFPR() const;
FPRReg fpr() const;
void restoreInto(MacroAssembler&, char* savedRegisters, GPRReg result, unsigned numFramesToPop = 0) const;
private:
Kind m_kind;
union {
int64_t constant;
struct {
int16_t dwarfRegNum;
int32_t offset;
} variable;
} u;
};
struct LocationHash {
static unsigned hash(const Location& key) { return key.hash(); }
static bool equal(const Location& a, const Location& b) { return a == b; }
static const bool safeToCompareToEmptyOrDeleted = true;
};
} }
namespace WTF {
void printInternal(PrintStream&, JSC::FTL::Location::Kind);
template<typename T> struct DefaultHash;
template<> struct DefaultHash<JSC::FTL::Location> {
typedef JSC::FTL::LocationHash Hash;
};
template<typename T> struct HashTraits;
template<> struct HashTraits<JSC::FTL::Location> : SimpleClassHashTraits<JSC::FTL::Location> { };
}
#endif // ENABLE(FTL_JIT)
#endif // FTLLocation_h