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| 1 // Copyright 2009 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are |
| 4 // met: |
| 5 // |
| 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided |
| 11 // with the distribution. |
| 12 // * Neither the name of Google Inc. nor the names of its |
| 13 // contributors may be used to endorse or promote products derived |
| 14 // from this software without specific prior written permission. |
| 15 // |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 |
| 28 #include "v8.h" |
| 29 |
| 30 #include "ic-inl.h" |
| 31 #include "objects-visiting.h" |
| 32 |
| 33 namespace v8 { |
| 34 namespace internal { |
| 35 |
| 36 |
| 37 static inline bool IsShortcutCandidate(int type) { |
| 38 return ((type & kShortcutTypeMask) == kShortcutTypeTag); |
| 39 } |
| 40 |
| 41 |
| 42 StaticVisitorBase::VisitorId StaticVisitorBase::GetVisitorId( |
| 43 int instance_type, |
| 44 int instance_size) { |
| 45 if (instance_type < FIRST_NONSTRING_TYPE) { |
| 46 switch (instance_type & kStringRepresentationMask) { |
| 47 case kSeqStringTag: |
| 48 if ((instance_type & kStringEncodingMask) == kAsciiStringTag) { |
| 49 return kVisitSeqAsciiString; |
| 50 } else { |
| 51 return kVisitSeqTwoByteString; |
| 52 } |
| 53 |
| 54 case kConsStringTag: |
| 55 if (IsShortcutCandidate(instance_type)) { |
| 56 return kVisitShortcutCandidate; |
| 57 } else { |
| 58 return kVisitConsString; |
| 59 } |
| 60 |
| 61 case kExternalStringTag: |
| 62 return GetVisitorIdForSize(kVisitDataObject, |
| 63 kVisitDataObjectGeneric, |
| 64 ExternalString::kSize); |
| 65 } |
| 66 UNREACHABLE(); |
| 67 } |
| 68 |
| 69 switch (instance_type) { |
| 70 case BYTE_ARRAY_TYPE: |
| 71 return kVisitByteArray; |
| 72 |
| 73 case FIXED_ARRAY_TYPE: |
| 74 return kVisitFixedArray; |
| 75 |
| 76 case ODDBALL_TYPE: |
| 77 return kVisitOddball; |
| 78 |
| 79 case MAP_TYPE: |
| 80 return kVisitMap; |
| 81 |
| 82 case CODE_TYPE: |
| 83 return kVisitCode; |
| 84 |
| 85 case JS_GLOBAL_PROPERTY_CELL_TYPE: |
| 86 return kVisitPropertyCell; |
| 87 |
| 88 case SHARED_FUNCTION_INFO_TYPE: |
| 89 return kVisitSharedFunctionInfo; |
| 90 |
| 91 case PROXY_TYPE: |
| 92 return GetVisitorIdForSize(kVisitDataObject, |
| 93 kVisitDataObjectGeneric, |
| 94 Proxy::kSize); |
| 95 |
| 96 case FILLER_TYPE: |
| 97 return kVisitDataObjectGeneric; |
| 98 |
| 99 case JS_OBJECT_TYPE: |
| 100 case JS_CONTEXT_EXTENSION_OBJECT_TYPE: |
| 101 case JS_VALUE_TYPE: |
| 102 case JS_ARRAY_TYPE: |
| 103 case JS_REGEXP_TYPE: |
| 104 case JS_FUNCTION_TYPE: |
| 105 case JS_GLOBAL_PROXY_TYPE: |
| 106 case JS_GLOBAL_OBJECT_TYPE: |
| 107 case JS_BUILTINS_OBJECT_TYPE: |
| 108 return GetVisitorIdForSize(kVisitJSObject, |
| 109 kVisitJSObjectGeneric, |
| 110 instance_size); |
| 111 |
| 112 case HEAP_NUMBER_TYPE: |
| 113 case PIXEL_ARRAY_TYPE: |
| 114 case EXTERNAL_BYTE_ARRAY_TYPE: |
| 115 case EXTERNAL_UNSIGNED_BYTE_ARRAY_TYPE: |
| 116 case EXTERNAL_SHORT_ARRAY_TYPE: |
| 117 case EXTERNAL_UNSIGNED_SHORT_ARRAY_TYPE: |
| 118 case EXTERNAL_INT_ARRAY_TYPE: |
| 119 case EXTERNAL_UNSIGNED_INT_ARRAY_TYPE: |
| 120 case EXTERNAL_FLOAT_ARRAY_TYPE: |
| 121 return GetVisitorIdForSize(kVisitDataObject, |
| 122 kVisitDataObjectGeneric, |
| 123 instance_size); |
| 124 |
| 125 #define MAKE_STRUCT_CASE(NAME, Name, name) \ |
| 126 case NAME##_TYPE: |
| 127 STRUCT_LIST(MAKE_STRUCT_CASE) |
| 128 #undef MAKE_STRUCT_CASE |
| 129 return GetVisitorIdForSize(kVisitStruct, |
| 130 kVisitStructGeneric, |
| 131 instance_size); |
| 132 |
| 133 default: |
| 134 UNREACHABLE(); |
| 135 return kVisitorIdCount; |
| 136 } |
| 137 } |
| 138 |
| 139 } } // namespace v8::internal |
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