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// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "v8.h"
#include "ic-inl.h"
#include "objects-visiting.h"
namespace v8 {
namespace internal {
static inline bool IsShortcutCandidate(int type) {
return ((type & kShortcutTypeMask) == kShortcutTypeTag);
}
StaticVisitorBase::VisitorId StaticVisitorBase::GetVisitorId(
int instance_type,
int instance_size) {
if (instance_type < FIRST_NONSTRING_TYPE) {
switch (instance_type & kStringRepresentationMask) {
case kSeqStringTag:
if ((instance_type & kStringEncodingMask) == kOneByteStringTag) {
return kVisitSeqAsciiString;
} else {
return kVisitSeqTwoByteString;
}
case kConsStringTag:
if (IsShortcutCandidate(instance_type)) {
return kVisitShortcutCandidate;
} else {
return kVisitConsString;
}
case kSlicedStringTag:
return kVisitSlicedString;
case kExternalStringTag:
return GetVisitorIdForSize(kVisitDataObject,
kVisitDataObjectGeneric,
instance_size);
}
UNREACHABLE();
}
switch (instance_type) {
case BYTE_ARRAY_TYPE:
return kVisitByteArray;
case FREE_SPACE_TYPE:
return kVisitFreeSpace;
case FIXED_ARRAY_TYPE:
return kVisitFixedArray;
case FIXED_DOUBLE_ARRAY_TYPE:
return kVisitFixedDoubleArray;
case ODDBALL_TYPE:
return kVisitOddball;
case MAP_TYPE:
return kVisitMap;
case CODE_TYPE:
return kVisitCode;
case JS_GLOBAL_PROPERTY_CELL_TYPE:
return kVisitPropertyCell;
case JS_SET_TYPE:
return GetVisitorIdForSize(kVisitStruct,
kVisitStructGeneric,
JSSet::kSize);
case JS_MAP_TYPE:
return GetVisitorIdForSize(kVisitStruct,
kVisitStructGeneric,
JSMap::kSize);
case JS_WEAK_MAP_TYPE:
return kVisitJSWeakMap;
case JS_REGEXP_TYPE:
return kVisitJSRegExp;
case SHARED_FUNCTION_INFO_TYPE:
return kVisitSharedFunctionInfo;
case JS_PROXY_TYPE:
return GetVisitorIdForSize(kVisitStruct,
kVisitStructGeneric,
JSProxy::kSize);
case JS_FUNCTION_PROXY_TYPE:
return GetVisitorIdForSize(kVisitStruct,
kVisitStructGeneric,
JSFunctionProxy::kSize);
case FOREIGN_TYPE:
return GetVisitorIdForSize(kVisitDataObject,
kVisitDataObjectGeneric,
Foreign::kSize);
case FILLER_TYPE:
return kVisitDataObjectGeneric;
case JS_OBJECT_TYPE:
case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
case JS_MODULE_TYPE:
case JS_VALUE_TYPE:
case JS_DATE_TYPE:
case JS_ARRAY_TYPE:
case JS_GLOBAL_PROXY_TYPE:
case JS_GLOBAL_OBJECT_TYPE:
case JS_BUILTINS_OBJECT_TYPE:
case JS_MESSAGE_OBJECT_TYPE:
return GetVisitorIdForSize(kVisitJSObject,
kVisitJSObjectGeneric,
instance_size);
case JS_FUNCTION_TYPE:
return kVisitJSFunction;
case HEAP_NUMBER_TYPE:
case EXTERNAL_PIXEL_ARRAY_TYPE:
case EXTERNAL_BYTE_ARRAY_TYPE:
case EXTERNAL_UNSIGNED_BYTE_ARRAY_TYPE:
case EXTERNAL_SHORT_ARRAY_TYPE:
case EXTERNAL_UNSIGNED_SHORT_ARRAY_TYPE:
case EXTERNAL_INT_ARRAY_TYPE:
case EXTERNAL_UNSIGNED_INT_ARRAY_TYPE:
case EXTERNAL_FLOAT_ARRAY_TYPE:
case EXTERNAL_DOUBLE_ARRAY_TYPE:
return GetVisitorIdForSize(kVisitDataObject,
kVisitDataObjectGeneric,
instance_size);
#define MAKE_STRUCT_CASE(NAME, Name, name) \
case NAME##_TYPE:
STRUCT_LIST(MAKE_STRUCT_CASE)
#undef MAKE_STRUCT_CASE
return GetVisitorIdForSize(kVisitStruct,
kVisitStructGeneric,
instance_size);
default:
UNREACHABLE();
return kVisitorIdCount;
}
}
} } // namespace v8::internal
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