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// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/compiler/access-builder.h"
#include "src/types-inl.h"
namespace v8 {
namespace internal {
namespace compiler {
// static
FieldAccess AccessBuilder::ForMap() {
return {kTaggedBase, HeapObject::kMapOffset, MaybeHandle<Name>(), Type::Any(),
kMachAnyTagged};
}
// static
FieldAccess AccessBuilder::ForJSObjectProperties() {
return {kTaggedBase, JSObject::kPropertiesOffset, MaybeHandle<Name>(),
Type::Any(), kMachAnyTagged};
}
// static
FieldAccess AccessBuilder::ForJSObjectElements() {
return {kTaggedBase, JSObject::kElementsOffset, MaybeHandle<Name>(),
Type::Internal(), kMachAnyTagged};
}
// static
FieldAccess AccessBuilder::ForJSFunctionContext() {
return {kTaggedBase, JSFunction::kContextOffset, MaybeHandle<Name>(),
Type::Internal(), kMachAnyTagged};
}
// static
FieldAccess AccessBuilder::ForJSArrayBufferBackingStore() {
return {kTaggedBase, JSArrayBuffer::kBackingStoreOffset, MaybeHandle<Name>(),
Type::UntaggedPointer(), kMachPtr};
}
// static
FieldAccess AccessBuilder::ForFixedArrayLength() {
return {kTaggedBase, FixedArray::kLengthOffset, MaybeHandle<Name>(),
Type::TaggedSigned(), kMachAnyTagged};
}
// static
FieldAccess AccessBuilder::ForExternalArrayPointer() {
return {kTaggedBase, ExternalArray::kExternalPointerOffset,
MaybeHandle<Name>(), Type::UntaggedPointer(), kMachPtr};
}
// static
FieldAccess AccessBuilder::ForMapInstanceType() {
return {kTaggedBase, Map::kInstanceTypeOffset, Handle<Name>(),
Type::UntaggedUnsigned8(), kMachUint8};
}
// static
FieldAccess AccessBuilder::ForStringLength(Zone* zone) {
return {kTaggedBase, String::kLengthOffset, Handle<Name>(),
Type::Range(0, String::kMaxLength, zone), kMachAnyTagged};
}
// static
FieldAccess AccessBuilder::ForValue() {
return {kTaggedBase, JSValue::kValueOffset, Handle<Name>(), Type::Any(),
kMachAnyTagged};
}
// static
FieldAccess AccessBuilder::ForContextSlot(size_t index) {
int offset = Context::kHeaderSize + static_cast<int>(index) * kPointerSize;
DCHECK_EQ(offset,
Context::SlotOffset(static_cast<int>(index)) + kHeapObjectTag);
return {kTaggedBase, offset, Handle<Name>(), Type::Any(), kMachAnyTagged};
}
// static
FieldAccess AccessBuilder::ForStatsCounter() {
return {kUntaggedBase, 0, MaybeHandle<Name>(), Type::Signed32(), kMachInt32};
}
// static
FieldAccess AccessBuilder::ForPropertyCellValue() {
return {kTaggedBase, PropertyCell::kValueOffset, Handle<Name>(), Type::Any(),
kMachAnyTagged};
}
// static
ElementAccess AccessBuilder::ForFixedArrayElement() {
return {kTaggedBase, FixedArray::kHeaderSize, Type::Any(), kMachAnyTagged};
}
// static
ElementAccess AccessBuilder::ForTypedArrayElement(ExternalArrayType type,
bool is_external) {
BaseTaggedness taggedness = is_external ? kUntaggedBase : kTaggedBase;
int header_size = is_external ? 0 : FixedTypedArrayBase::kDataOffset;
switch (type) {
case kExternalInt8Array:
return {taggedness, header_size, Type::Signed32(), kMachInt8};
case kExternalUint8Array:
case kExternalUint8ClampedArray:
return {taggedness, header_size, Type::Unsigned32(), kMachUint8};
case kExternalInt16Array:
return {taggedness, header_size, Type::Signed32(), kMachInt16};
case kExternalUint16Array:
return {taggedness, header_size, Type::Unsigned32(), kMachUint16};
case kExternalInt32Array:
return {taggedness, header_size, Type::Signed32(), kMachInt32};
case kExternalUint32Array:
return {taggedness, header_size, Type::Unsigned32(), kMachUint32};
case kExternalFloat32Array:
return {taggedness, header_size, Type::Number(), kMachFloat32};
case kExternalFloat64Array:
return {taggedness, header_size, Type::Number(), kMachFloat64};
}
UNREACHABLE();
return {kUntaggedBase, 0, Type::None(), kMachNone};
}
// static
ElementAccess AccessBuilder::ForSeqStringChar(String::Encoding encoding) {
switch (encoding) {
case String::ONE_BYTE_ENCODING:
return {kTaggedBase, SeqString::kHeaderSize, Type::Unsigned32(),
kMachUint8};
case String::TWO_BYTE_ENCODING:
return {kTaggedBase, SeqString::kHeaderSize, Type::Unsigned32(),
kMachUint16};
}
UNREACHABLE();
return {kUntaggedBase, 0, Type::None(), kMachNone};
}
} // namespace compiler
} // namespace internal
} // namespace v8
|
