ArrayMode ArrayMode::fromObserved(const ConcurrentJITLocker& locker, ArrayProfile* profile, Array::Action action, bool makeSafe)
{
Array::Class nonArray;
if (profile->usesOriginalArrayStructures(locker))
nonArray = Array::OriginalNonArray;
else
nonArray = Array::NonArray;
ArrayModes observed = profile->observedArrayModes(locker);
switch (observed) {
case 0:
return ArrayMode(Array::Unprofiled);
case asArrayModes(NonArray):
if (action == Array::Write && !profile->mayInterceptIndexedAccesses(locker))
return ArrayMode(Array::Undecided, nonArray, Array::OutOfBounds, Array::Convert);
return ArrayMode(Array::SelectUsingPredictions, nonArray).withSpeculationFromProfile(locker, profile, makeSafe);
case asArrayModes(ArrayWithUndecided):
if (action == Array::Write)
return ArrayMode(Array::Undecided, Array::Array, Array::OutOfBounds, Array::Convert);
return ArrayMode(Array::Generic);
case asArrayModes(NonArray) | asArrayModes(ArrayWithUndecided):
if (action == Array::Write && !profile->mayInterceptIndexedAccesses(locker))
return ArrayMode(Array::Undecided, Array::PossiblyArray, Array::OutOfBounds, Array::Convert);
return ArrayMode(Array::SelectUsingPredictions).withSpeculationFromProfile(locker, profile, makeSafe);
case asArrayModes(NonArrayWithInt32):
return ArrayMode(Array::Int32, nonArray, Array::AsIs).withProfile(locker, profile, makeSafe);
case asArrayModes(ArrayWithInt32):
return ArrayMode(Array::Int32, Array::Array, Array::AsIs).withProfile(locker, profile, makeSafe);
case asArrayModes(NonArrayWithInt32) | asArrayModes(ArrayWithInt32):
return ArrayMode(Array::Int32, Array::PossiblyArray, Array::AsIs).withProfile(locker, profile, makeSafe);
case asArrayModes(NonArrayWithDouble):
return ArrayMode(Array::Double, nonArray, Array::AsIs).withProfile(locker, profile, makeSafe);
case asArrayModes(ArrayWithDouble):
return ArrayMode(Array::Double, Array::Array, Array::AsIs).withProfile(locker, profile, makeSafe);
case asArrayModes(NonArrayWithDouble) | asArrayModes(ArrayWithDouble):
return ArrayMode(Array::Double, Array::PossiblyArray, Array::AsIs).withProfile(locker, profile, makeSafe);
case asArrayModes(NonArrayWithContiguous):
return ArrayMode(Array::Contiguous, nonArray, Array::AsIs).withProfile(locker, profile, makeSafe);
case asArrayModes(ArrayWithContiguous):
return ArrayMode(Array::Contiguous, Array::Array, Array::AsIs).withProfile(locker, profile, makeSafe);
case asArrayModes(NonArrayWithContiguous) | asArrayModes(ArrayWithContiguous):
return ArrayMode(Array::Contiguous, Array::PossiblyArray, Array::AsIs).withProfile(locker, profile, makeSafe);
case asArrayModes(NonArrayWithArrayStorage):
return ArrayMode(Array::ArrayStorage, nonArray, Array::AsIs).withProfile(locker, profile, makeSafe);
case asArrayModes(NonArrayWithSlowPutArrayStorage):
case asArrayModes(NonArrayWithArrayStorage) | asArrayModes(NonArrayWithSlowPutArrayStorage):
return ArrayMode(Array::SlowPutArrayStorage, nonArray, Array::AsIs).withProfile(locker, profile, makeSafe);
case asArrayModes(ArrayWithArrayStorage):
return ArrayMode(Array::ArrayStorage, Array::Array, Array::AsIs).withProfile(locker, profile, makeSafe);
case asArrayModes(ArrayWithSlowPutArrayStorage):
case asArrayModes(ArrayWithArrayStorage) | asArrayModes(ArrayWithSlowPutArrayStorage):
return ArrayMode(Array::SlowPutArrayStorage, Array::Array, Array::AsIs).withProfile(locker, profile, makeSafe);
case asArrayModes(NonArrayWithArrayStorage) | asArrayModes(ArrayWithArrayStorage):
return ArrayMode(Array::ArrayStorage, Array::PossiblyArray, Array::AsIs).withProfile(locker, profile, makeSafe);
case asArrayModes(NonArrayWithSlowPutArrayStorage) | asArrayModes(ArrayWithSlowPutArrayStorage):
case asArrayModes(NonArrayWithArrayStorage) | asArrayModes(ArrayWithArrayStorage) | asArrayModes(NonArrayWithSlowPutArrayStorage) | asArrayModes(ArrayWithSlowPutArrayStorage):
return ArrayMode(Array::SlowPutArrayStorage, Array::PossiblyArray, Array::AsIs).withProfile(locker, profile, makeSafe);
default:
if ((observed & asArrayModes(NonArray)) && profile->mayInterceptIndexedAccesses(locker))
return ArrayMode(Array::SelectUsingPredictions).withSpeculationFromProfile(locker, profile, makeSafe);
Array::Type type;
Array::Class arrayClass;
if (shouldUseSlowPutArrayStorage(observed))
type = Array::SlowPutArrayStorage;
else if (shouldUseFastArrayStorage(observed))
type = Array::ArrayStorage;
else if (shouldUseContiguous(observed))
type = Array::Contiguous;
else if (shouldUseDouble(observed))
type = Array::Double;
else if (shouldUseInt32(observed))
type = Array::Int32;
else
type = Array::Undecided;
if (hasSeenArray(observed) && hasSeenNonArray(observed))
arrayClass = Array::PossiblyArray;
else if (hasSeenArray(observed))
arrayClass = Array::Array;
else if (hasSeenNonArray(observed))
arrayClass = nonArray;
else
arrayClass = Array::PossiblyArray;
return ArrayMode(type, arrayClass, Array::Convert).withProfile(locker, profile, makeSafe);
}
}
ArrayMode ArrayMode::fromObserved(ArrayProfile* profile, Array::Action action, bool makeSafe)
{
ArrayModes observed = profile->observedArrayModes();
switch (observed) {
case 0:
return ArrayMode(Array::Unprofiled);
case asArrayModes(NonArray):
if (action == Array::Write && !profile->mayInterceptIndexedAccesses())
return ArrayMode(Array::Undecided, Array::NonArray, Array::OutOfBounds, Array::Convert);
return ArrayMode(Array::SelectUsingPredictions);
case asArrayModes(ArrayWithUndecided):
if (action == Array::Write)
return ArrayMode(Array::Undecided, Array::Array, Array::OutOfBounds, Array::Convert);
return ArrayMode(Array::Generic);
case asArrayModes(NonArray) | asArrayModes(ArrayWithUndecided):
if (action == Array::Write && !profile->mayInterceptIndexedAccesses())
return ArrayMode(Array::Undecided, Array::PossiblyArray, Array::OutOfBounds, Array::Convert);
return ArrayMode(Array::SelectUsingPredictions);
case asArrayModes(NonArrayWithInt32):
return ArrayMode(Array::Int32, Array::NonArray, Array::AsIs).withProfile(profile, makeSafe);
case asArrayModes(ArrayWithInt32):
return ArrayMode(Array::Int32, Array::Array, Array::AsIs).withProfile(profile, makeSafe);
case asArrayModes(NonArrayWithInt32) | asArrayModes(ArrayWithInt32):
return ArrayMode(Array::Int32, Array::PossiblyArray, Array::AsIs).withProfile(profile, makeSafe);
case asArrayModes(NonArrayWithDouble):
return ArrayMode(Array::Double, Array::NonArray, Array::AsIs).withProfile(profile, makeSafe);
case asArrayModes(ArrayWithDouble):
return ArrayMode(Array::Double, Array::Array, Array::AsIs).withProfile(profile, makeSafe);
case asArrayModes(NonArrayWithDouble) | asArrayModes(ArrayWithDouble):
return ArrayMode(Array::Double, Array::PossiblyArray, Array::AsIs).withProfile(profile, makeSafe);
case asArrayModes(NonArrayWithContiguous):
return ArrayMode(Array::Contiguous, Array::NonArray, Array::AsIs).withProfile(profile, makeSafe);
case asArrayModes(ArrayWithContiguous):
return ArrayMode(Array::Contiguous, Array::Array, Array::AsIs).withProfile(profile, makeSafe);
case asArrayModes(NonArrayWithContiguous) | asArrayModes(ArrayWithContiguous):
return ArrayMode(Array::Contiguous, Array::PossiblyArray, Array::AsIs).withProfile(profile, makeSafe);
case asArrayModes(NonArrayWithArrayStorage):
return ArrayMode(Array::ArrayStorage, Array::NonArray, Array::AsIs).withProfile(profile, makeSafe);
case asArrayModes(NonArrayWithSlowPutArrayStorage):
case asArrayModes(NonArrayWithArrayStorage) | asArrayModes(NonArrayWithSlowPutArrayStorage):
return ArrayMode(Array::SlowPutArrayStorage, Array::NonArray, Array::AsIs).withProfile(profile, makeSafe);
case asArrayModes(ArrayWithArrayStorage):
return ArrayMode(Array::ArrayStorage, Array::Array, Array::AsIs).withProfile(profile, makeSafe);
case asArrayModes(ArrayWithSlowPutArrayStorage):
case asArrayModes(ArrayWithArrayStorage) | asArrayModes(ArrayWithSlowPutArrayStorage):
return ArrayMode(Array::SlowPutArrayStorage, Array::Array, Array::AsIs).withProfile(profile, makeSafe);
case asArrayModes(NonArrayWithArrayStorage) | asArrayModes(ArrayWithArrayStorage):
return ArrayMode(Array::ArrayStorage, Array::PossiblyArray, Array::AsIs).withProfile(profile, makeSafe);
case asArrayModes(NonArrayWithSlowPutArrayStorage) | asArrayModes(ArrayWithSlowPutArrayStorage):
case asArrayModes(NonArrayWithArrayStorage) | asArrayModes(ArrayWithArrayStorage) | asArrayModes(NonArrayWithSlowPutArrayStorage) | asArrayModes(ArrayWithSlowPutArrayStorage):
return ArrayMode(Array::SlowPutArrayStorage, Array::PossiblyArray, Array::AsIs).withProfile(profile, makeSafe);
default:
if ((observed & asArrayModes(NonArray)) && profile->mayInterceptIndexedAccesses())
return ArrayMode(Array::SelectUsingPredictions);
Array::Type type;
Array::Class arrayClass;
if (shouldUseSlowPutArrayStorage(observed))
type = Array::SlowPutArrayStorage;
else if (shouldUseFastArrayStorage(observed))
type = Array::ArrayStorage;
else if (shouldUseContiguous(observed))
type = Array::Contiguous;
else if (shouldUseDouble(observed))
type = Array::Double;
else if (shouldUseInt32(observed))
type = Array::Int32;
else
type = Array::Undecided;
if (observed & (asArrayModes(ArrayWithUndecided) | asArrayModes(ArrayWithInt32) | asArrayModes(ArrayWithDouble) | asArrayModes(ArrayWithContiguous) | asArrayModes(ArrayWithArrayStorage) | asArrayModes(ArrayWithSlowPutArrayStorage)))
arrayClass = Array::Array;
else if (observed & (asArrayModes(NonArray) | asArrayModes(NonArrayWithInt32) | asArrayModes(NonArrayWithDouble) | asArrayModes(NonArrayWithContiguous) | asArrayModes(NonArrayWithArrayStorage) | asArrayModes(NonArrayWithSlowPutArrayStorage)))
arrayClass = Array::NonArray;
else
arrayClass = Array::PossiblyArray;
return ArrayMode(type, arrayClass, Array::Convert).withProfile(profile, makeSafe);
}
}