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Issue 1539034: Add inline caches for loading non-existing properties. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 10 years, 8 months ago
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1 // Copyright 2010 the V8 project authors. All rights reserved. 1 // Copyright 2010 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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1137 __ movq(rax, Operand(rsp, kPointerSize)); 1137 __ movq(rax, Operand(rsp, kPointerSize));
1138 GenerateLoadConstant(object, holder, rax, rbx, rdx, value, name, &miss); 1138 GenerateLoadConstant(object, holder, rax, rbx, rdx, value, name, &miss);
1139 __ bind(&miss); 1139 __ bind(&miss);
1140 GenerateLoadMiss(masm(), Code::LOAD_IC); 1140 GenerateLoadMiss(masm(), Code::LOAD_IC);
1141 1141
1142 // Return the generated code. 1142 // Return the generated code.
1143 return GetCode(CONSTANT_FUNCTION, name); 1143 return GetCode(CONSTANT_FUNCTION, name);
1144 } 1144 }
1145 1145
1146 1146
1147 Object* LoadStubCompiler::CompileLoadNonExisting(JSObject* object) {
1148 // ----------- S t a t e -------------
1149 // -- rcx : name
1150 // -- rsp[0] : return address
1151 // -- rsp[8] : receiver
1152 // -----------------------------------
1153 Label miss;
1154
1155 // Load receiver.
1156 __ movq(rax, Operand(rsp, kPointerSize));
1157
1158 // Check the maps of the full prototype chain.
1159 JSObject* last = object;
1160 while (last->GetPrototype() != Heap::null_value()) {
1161 last = JSObject::cast(last->GetPrototype());
1162 }
1163 CheckPrototypes(object, rax, last, rbx, rdx, Heap::empty_string(), &miss);
1164
1165 // Return undefined if maps of the full prototype chain is still the same.
1166 __ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
1167 __ ret(0);
1168
1169 __ bind(&miss);
1170 GenerateLoadMiss(masm(), Code::LOAD_IC);
1171
1172 // Return the generated code.
1173 return GetCode(NON_EXISTING, Heap::empty_string());
1174 }
1175
1176
1147 Object* LoadStubCompiler::CompileLoadField(JSObject* object, 1177 Object* LoadStubCompiler::CompileLoadField(JSObject* object,
1148 JSObject* holder, 1178 JSObject* holder,
1149 int index, 1179 int index,
1150 String* name) { 1180 String* name) {
1151 // ----------- S t a t e ------------- 1181 // ----------- S t a t e -------------
1152 // -- rcx : name 1182 // -- rcx : name
1153 // -- rsp[0] : return address 1183 // -- rsp[0] : return address
1154 // -- rsp[8] : receiver 1184 // -- rsp[8] : receiver
1155 // ----------------------------------- 1185 // -----------------------------------
1156 Label miss; 1186 Label miss;
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1959 __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET); 1989 __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET);
1960 1990
1961 // Return the generated code. 1991 // Return the generated code.
1962 return GetCode(); 1992 return GetCode();
1963 } 1993 }
1964 1994
1965 1995
1966 #undef __ 1996 #undef __
1967 1997
1968 } } // namespace v8::internal 1998 } } // namespace v8::internal
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