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Issue 9365057: Relax TransitionElementsKind DependsOn/Changes dependencies. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Ensure that MapChecks before and after transitions are recognized as dupes Created 8 years, 10 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 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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4188 Handle<Map> original_map, 4188 Handle<Map> original_map,
4189 Handle<Map> transitioned_map) 4189 Handle<Map> transitioned_map)
4190 : original_map_(original_map), 4190 : original_map_(original_map),
4191 transitioned_map_(transitioned_map) { 4191 transitioned_map_(transitioned_map) {
4192 SetOperandAt(0, object); 4192 SetOperandAt(0, object);
4193 SetFlag(kUseGVN); 4193 SetFlag(kUseGVN);
4194 SetGVNFlag(kDependsOnMaps); 4194 SetGVNFlag(kDependsOnMaps);
4195 SetGVNFlag(kChangesElementsKind); 4195 SetGVNFlag(kChangesElementsKind);
4196 if (original_map->has_fast_double_elements()) { 4196 if (original_map->has_fast_double_elements()) {
4197 SetGVNFlag(kChangesElementsPointer); 4197 SetGVNFlag(kChangesElementsPointer);
4198 SetGVNFlag(kDependsOnElementsPointer);
4199 SetGVNFlag(kDependsOnDoubleArrayElements); 4198 SetGVNFlag(kDependsOnDoubleArrayElements);
4200 } else if (transitioned_map->has_fast_double_elements()) { 4199 } else if (transitioned_map->has_fast_double_elements()) {
4201 SetGVNFlag(kChangesElementsPointer); 4200 SetGVNFlag(kChangesElementsPointer);
4202 SetGVNFlag(kDependsOnElementsPointer);
4203 SetGVNFlag(kDependsOnArrayElements); 4201 SetGVNFlag(kDependsOnArrayElements);
4204 } 4202 }
4205 set_representation(Representation::Tagged()); 4203 set_representation(Representation::Tagged());
4206 } 4204 }
4207 4205
4208 virtual Representation RequiredInputRepresentation(int index) { 4206 virtual Representation RequiredInputRepresentation(int index) {
4209 return Representation::Tagged(); 4207 return Representation::Tagged();
4210 } 4208 }
4211 4209
4212 HValue* object() { return OperandAt(0); } 4210 HValue* object() { return OperandAt(0); }
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4625 4623
4626 DECLARE_CONCRETE_INSTRUCTION(In) 4624 DECLARE_CONCRETE_INSTRUCTION(In)
4627 }; 4625 };
4628 4626
4629 #undef DECLARE_INSTRUCTION 4627 #undef DECLARE_INSTRUCTION
4630 #undef DECLARE_CONCRETE_INSTRUCTION 4628 #undef DECLARE_CONCRETE_INSTRUCTION
4631 4629
4632 } } // namespace v8::internal 4630 } } // namespace v8::internal
4633 4631
4634 #endif // V8_HYDROGEN_INSTRUCTIONS_H_ 4632 #endif // V8_HYDROGEN_INSTRUCTIONS_H_
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