| // Copyright 2009 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) == kAsciiStringTag) { |
| return kVisitSeqAsciiString; |
| } else { |
| return kVisitSeqTwoByteString; |
| } |
| |
| case kConsStringTag: |
| if (IsShortcutCandidate(instance_type)) { |
| return kVisitShortcutCandidate; |
| } else { |
| return kVisitConsString; |
| } |
| |
| case kExternalStringTag: |
| return GetVisitorIdForSize(kVisitDataObject, |
| kVisitDataObjectGeneric, |
| ExternalString::kSize); |
| } |
| UNREACHABLE(); |
| } |
| |
| switch (instance_type) { |
| case BYTE_ARRAY_TYPE: |
| return kVisitByteArray; |
| |
| case FIXED_ARRAY_TYPE: |
| return kVisitFixedArray; |
| |
| case ODDBALL_TYPE: |
| return kVisitOddball; |
| |
| case MAP_TYPE: |
| return kVisitMap; |
| |
| case CODE_TYPE: |
| return kVisitCode; |
| |
| case JS_GLOBAL_PROPERTY_CELL_TYPE: |
| return kVisitPropertyCell; |
| |
| case SHARED_FUNCTION_INFO_TYPE: |
| return kVisitSharedFunctionInfo; |
| |
| case PROXY_TYPE: |
| return GetVisitorIdForSize(kVisitDataObject, |
| kVisitDataObjectGeneric, |
| Proxy::kSize); |
| |
| case FILLER_TYPE: |
| return kVisitDataObjectGeneric; |
| |
| case JS_OBJECT_TYPE: |
| case JS_CONTEXT_EXTENSION_OBJECT_TYPE: |
| case JS_VALUE_TYPE: |
| case JS_ARRAY_TYPE: |
| case JS_REGEXP_TYPE: |
| case JS_FUNCTION_TYPE: |
| case JS_GLOBAL_PROXY_TYPE: |
| case JS_GLOBAL_OBJECT_TYPE: |
| case JS_BUILTINS_OBJECT_TYPE: |
| return GetVisitorIdForSize(kVisitJSObject, |
| kVisitJSObjectGeneric, |
| instance_size); |
| |
| case HEAP_NUMBER_TYPE: |
| case 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: |
| 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 |