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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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919 } | 919 } |
920 if (FLAG_stress_environments && !instr->HasEnvironment()) { | 920 if (FLAG_stress_environments && !instr->HasEnvironment()) { |
921 instr = AssignEnvironment(instr); | 921 instr = AssignEnvironment(instr); |
922 } | 922 } |
923 chunk_->AddInstruction(instr, current_block_); | 923 chunk_->AddInstruction(instr, current_block_); |
924 } | 924 } |
925 current_instruction_ = old_current; | 925 current_instruction_ = old_current; |
926 } | 926 } |
927 | 927 |
928 | 928 |
929 LEnvironment* LChunkBuilder::CreateEnvironment( | |
930 HEnvironment* hydrogen_env, | |
931 int* argument_index_accumulator, | |
932 ZoneList<HValue*>* objects_to_materialize) { | |
933 if (hydrogen_env == NULL) return NULL; | |
934 | |
935 LEnvironment* outer = CreateEnvironment(hydrogen_env->outer(), | |
936 argument_index_accumulator, | |
937 objects_to_materialize); | |
938 BailoutId ast_id = hydrogen_env->ast_id(); | |
939 ASSERT(!ast_id.IsNone() || | |
940 hydrogen_env->frame_type() != JS_FUNCTION); | |
941 int value_count = hydrogen_env->length() - hydrogen_env->specials_count(); | |
942 LEnvironment* result = new(zone()) LEnvironment( | |
943 hydrogen_env->closure(), | |
944 hydrogen_env->frame_type(), | |
945 ast_id, | |
946 hydrogen_env->parameter_count(), | |
947 argument_count_, | |
948 value_count, | |
949 outer, | |
950 hydrogen_env->entry(), | |
951 zone()); | |
952 int argument_index = *argument_index_accumulator; | |
953 int object_index = objects_to_materialize->length(); | |
954 for (int i = 0; i < hydrogen_env->length(); ++i) { | |
955 if (hydrogen_env->is_special_index(i)) continue; | |
956 | |
957 LOperand* op; | |
958 HValue* value = hydrogen_env->values()->at(i); | |
959 if (value->IsArgumentsObject() || value->IsCapturedObject()) { | |
960 objects_to_materialize->Add(value, zone()); | |
961 op = LEnvironment::materialization_marker(); | |
962 } else if (value->IsPushArgument()) { | |
963 op = new(zone()) LArgument(argument_index++); | |
964 } else { | |
965 op = UseAny(value); | |
966 } | |
967 result->AddValue(op, | |
968 value->representation(), | |
969 value->CheckFlag(HInstruction::kUint32)); | |
970 } | |
971 | |
972 for (int i = object_index; i < objects_to_materialize->length(); ++i) { | |
973 HValue* object_to_materialize = objects_to_materialize->at(i); | |
974 int previously_materialized_object = -1; | |
975 for (int prev = 0; prev < i; ++prev) { | |
976 if (objects_to_materialize->at(prev) == objects_to_materialize->at(i)) { | |
977 previously_materialized_object = prev; | |
978 break; | |
979 } | |
980 } | |
981 int length = object_to_materialize->OperandCount(); | |
982 bool is_arguments = object_to_materialize->IsArgumentsObject(); | |
983 if (previously_materialized_object >= 0) { | |
984 result->AddDuplicateObject(previously_materialized_object); | |
985 continue; | |
986 } else { | |
987 result->AddNewObject(is_arguments ? length - 1 : length, is_arguments); | |
988 } | |
989 for (int i = is_arguments ? 1 : 0; i < length; ++i) { | |
990 LOperand* op; | |
991 HValue* value = object_to_materialize->OperandAt(i); | |
992 if (value->IsArgumentsObject() || value->IsCapturedObject()) { | |
993 objects_to_materialize->Add(value, zone()); | |
994 op = LEnvironment::materialization_marker(); | |
995 } else { | |
996 ASSERT(!value->IsPushArgument()); | |
997 op = UseAny(value); | |
998 } | |
999 result->AddValue(op, | |
1000 value->representation(), | |
1001 value->CheckFlag(HInstruction::kUint32)); | |
1002 } | |
1003 } | |
1004 | |
1005 if (hydrogen_env->frame_type() == JS_FUNCTION) { | |
1006 *argument_index_accumulator = argument_index; | |
1007 } | |
1008 | |
1009 return result; | |
1010 } | |
1011 | |
1012 | |
1013 LInstruction* LChunkBuilder::DoGoto(HGoto* instr) { | 929 LInstruction* LChunkBuilder::DoGoto(HGoto* instr) { |
1014 return new(zone()) LGoto(instr->FirstSuccessor()); | 930 return new(zone()) LGoto(instr->FirstSuccessor()); |
1015 } | 931 } |
1016 | 932 |
1017 | 933 |
1018 LInstruction* LChunkBuilder::DoBranch(HBranch* instr) { | 934 LInstruction* LChunkBuilder::DoBranch(HBranch* instr) { |
1019 LInstruction* goto_instr = CheckElideControlInstruction(instr); | 935 LInstruction* goto_instr = CheckElideControlInstruction(instr); |
1020 if (goto_instr != NULL) return goto_instr; | 936 if (goto_instr != NULL) return goto_instr; |
1021 | 937 |
1022 HValue* value = instr->value(); | 938 HValue* value = instr->value(); |
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2648 } | 2564 } |
2649 | 2565 |
2650 | 2566 |
2651 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) { | 2567 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) { |
2652 LOperand* object = UseRegister(instr->object()); | 2568 LOperand* object = UseRegister(instr->object()); |
2653 LOperand* index = UseRegister(instr->index()); | 2569 LOperand* index = UseRegister(instr->index()); |
2654 return DefineAsRegister(new(zone()) LLoadFieldByIndex(object, index)); | 2570 return DefineAsRegister(new(zone()) LLoadFieldByIndex(object, index)); |
2655 } | 2571 } |
2656 | 2572 |
2657 } } // namespace v8::internal | 2573 } } // namespace v8::internal |
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