Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 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 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame^] | 61 | case kSlicedStringTag: |
| 62 | return kVisitSlicedString; |
| 63 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 64 | case kExternalStringTag: |
| 65 | return GetVisitorIdForSize(kVisitDataObject, |
| 66 | kVisitDataObjectGeneric, |
| 67 | ExternalString::kSize); |
| 68 | } |
| 69 | UNREACHABLE(); |
| 70 | } |
| 71 | |
| 72 | switch (instance_type) { |
| 73 | case BYTE_ARRAY_TYPE: |
| 74 | return kVisitByteArray; |
| 75 | |
| 76 | case FIXED_ARRAY_TYPE: |
| 77 | return kVisitFixedArray; |
| 78 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 79 | case FIXED_DOUBLE_ARRAY_TYPE: |
| 80 | return kVisitFixedDoubleArray; |
| 81 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 82 | case ODDBALL_TYPE: |
| 83 | return kVisitOddball; |
| 84 | |
| 85 | case MAP_TYPE: |
| 86 | return kVisitMap; |
| 87 | |
| 88 | case CODE_TYPE: |
| 89 | return kVisitCode; |
| 90 | |
| 91 | case JS_GLOBAL_PROPERTY_CELL_TYPE: |
| 92 | return kVisitPropertyCell; |
| 93 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame^] | 94 | case JS_WEAK_MAP_TYPE: |
| 95 | return kVisitJSWeakMap; |
| 96 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 97 | case JS_REGEXP_TYPE: |
| 98 | return kVisitJSRegExp; |
| 99 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 100 | case SHARED_FUNCTION_INFO_TYPE: |
| 101 | return kVisitSharedFunctionInfo; |
| 102 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 103 | case JS_PROXY_TYPE: |
| 104 | return GetVisitorIdForSize(kVisitStruct, |
| 105 | kVisitStructGeneric, |
| 106 | JSProxy::kSize); |
| 107 | |
| 108 | case FOREIGN_TYPE: |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 109 | return GetVisitorIdForSize(kVisitDataObject, |
| 110 | kVisitDataObjectGeneric, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 111 | Foreign::kSize); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 112 | |
| 113 | case FILLER_TYPE: |
| 114 | return kVisitDataObjectGeneric; |
| 115 | |
| 116 | case JS_OBJECT_TYPE: |
| 117 | case JS_CONTEXT_EXTENSION_OBJECT_TYPE: |
| 118 | case JS_VALUE_TYPE: |
| 119 | case JS_ARRAY_TYPE: |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 120 | case JS_GLOBAL_PROXY_TYPE: |
| 121 | case JS_GLOBAL_OBJECT_TYPE: |
| 122 | case JS_BUILTINS_OBJECT_TYPE: |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 123 | case JS_MESSAGE_OBJECT_TYPE: |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 124 | return GetVisitorIdForSize(kVisitJSObject, |
| 125 | kVisitJSObjectGeneric, |
| 126 | instance_size); |
| 127 | |
| 128 | case JS_FUNCTION_TYPE: |
| 129 | return kVisitJSFunction; |
| 130 | |
| 131 | case HEAP_NUMBER_TYPE: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 132 | case EXTERNAL_PIXEL_ARRAY_TYPE: |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 133 | case EXTERNAL_BYTE_ARRAY_TYPE: |
| 134 | case EXTERNAL_UNSIGNED_BYTE_ARRAY_TYPE: |
| 135 | case EXTERNAL_SHORT_ARRAY_TYPE: |
| 136 | case EXTERNAL_UNSIGNED_SHORT_ARRAY_TYPE: |
| 137 | case EXTERNAL_INT_ARRAY_TYPE: |
| 138 | case EXTERNAL_UNSIGNED_INT_ARRAY_TYPE: |
| 139 | case EXTERNAL_FLOAT_ARRAY_TYPE: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 140 | case EXTERNAL_DOUBLE_ARRAY_TYPE: |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 141 | return GetVisitorIdForSize(kVisitDataObject, |
| 142 | kVisitDataObjectGeneric, |
| 143 | instance_size); |
| 144 | |
| 145 | #define MAKE_STRUCT_CASE(NAME, Name, name) \ |
| 146 | case NAME##_TYPE: |
| 147 | STRUCT_LIST(MAKE_STRUCT_CASE) |
| 148 | #undef MAKE_STRUCT_CASE |
| 149 | return GetVisitorIdForSize(kVisitStruct, |
| 150 | kVisitStructGeneric, |
| 151 | instance_size); |
| 152 | |
| 153 | default: |
| 154 | UNREACHABLE(); |
| 155 | return kVisitorIdCount; |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | } } // namespace v8::internal |