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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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3014 Register result = ToRegister(instr->result()); | 3014 Register result = ToRegister(instr->result()); |
3015 if (access.IsInobject()) { | 3015 if (access.IsInobject()) { |
3016 __ ldr(result, FieldMemOperand(object, offset)); | 3016 __ ldr(result, FieldMemOperand(object, offset)); |
3017 } else { | 3017 } else { |
3018 __ ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset)); | 3018 __ ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset)); |
3019 __ ldr(result, FieldMemOperand(result, offset)); | 3019 __ ldr(result, FieldMemOperand(result, offset)); |
3020 } | 3020 } |
3021 } | 3021 } |
3022 | 3022 |
3023 | 3023 |
3024 void LCodeGen::EmitLoadFieldOrConstantFunction(Register result, | |
3025 Register object, | |
3026 Handle<Map> type, | |
3027 Handle<String> name, | |
3028 LEnvironment* env) { | |
3029 LookupResult lookup(isolate()); | |
3030 type->LookupDescriptor(NULL, *name, &lookup); | |
3031 ASSERT(lookup.IsFound() || lookup.IsCacheable()); | |
3032 if (lookup.IsField()) { | |
3033 int index = lookup.GetLocalFieldIndexFromMap(*type); | |
3034 int offset = index * kPointerSize; | |
3035 if (index < 0) { | |
3036 // Negative property indices are in-object properties, indexed | |
3037 // from the end of the fixed part of the object. | |
3038 __ ldr(result, FieldMemOperand(object, offset + type->instance_size())); | |
3039 } else { | |
3040 // Non-negative property indices are in the properties array. | |
3041 __ ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset)); | |
3042 __ ldr(result, FieldMemOperand(result, offset + FixedArray::kHeaderSize)); | |
3043 } | |
3044 } else if (lookup.IsConstant()) { | |
3045 Handle<Object> constant(lookup.GetConstantFromMap(*type), isolate()); | |
3046 __ LoadObject(result, constant); | |
3047 } else { | |
3048 // Negative lookup. | |
3049 // Check prototypes. | |
3050 Handle<HeapObject> current(HeapObject::cast((*type)->prototype())); | |
3051 Heap* heap = type->GetHeap(); | |
3052 while (*current != heap->null_value()) { | |
3053 __ LoadHeapObject(result, current); | |
3054 __ ldr(result, FieldMemOperand(result, HeapObject::kMapOffset)); | |
3055 __ cmp(result, Operand(Handle<Map>(current->map()))); | |
3056 DeoptimizeIf(ne, env); | |
3057 current = | |
3058 Handle<HeapObject>(HeapObject::cast(current->map()->prototype())); | |
3059 } | |
3060 __ LoadRoot(result, Heap::kUndefinedValueRootIndex); | |
3061 } | |
3062 } | |
3063 | |
3064 | |
3065 void LCodeGen::DoLoadNamedFieldPolymorphic(LLoadNamedFieldPolymorphic* instr) { | |
3066 Register object = ToRegister(instr->object()); | |
3067 Register result = ToRegister(instr->result()); | |
3068 Register object_map = scratch0(); | |
3069 | |
3070 int map_count = instr->hydrogen()->types()->length(); | |
3071 bool need_generic = instr->hydrogen()->need_generic(); | |
3072 | |
3073 if (map_count == 0 && !need_generic) { | |
3074 DeoptimizeIf(al, instr->environment()); | |
3075 return; | |
3076 } | |
3077 Handle<String> name = instr->hydrogen()->name(); | |
3078 Label done; | |
3079 __ ldr(object_map, FieldMemOperand(object, HeapObject::kMapOffset)); | |
3080 for (int i = 0; i < map_count; ++i) { | |
3081 bool last = (i == map_count - 1); | |
3082 Handle<Map> map = instr->hydrogen()->types()->at(i); | |
3083 Label check_passed; | |
3084 __ CompareMap(object_map, map, &check_passed); | |
3085 if (last && !need_generic) { | |
3086 DeoptimizeIf(ne, instr->environment()); | |
3087 __ bind(&check_passed); | |
3088 EmitLoadFieldOrConstantFunction( | |
3089 result, object, map, name, instr->environment()); | |
3090 } else { | |
3091 Label next; | |
3092 __ b(ne, &next); | |
3093 __ bind(&check_passed); | |
3094 EmitLoadFieldOrConstantFunction( | |
3095 result, object, map, name, instr->environment()); | |
3096 __ b(&done); | |
3097 __ bind(&next); | |
3098 } | |
3099 } | |
3100 if (need_generic) { | |
3101 __ mov(r2, Operand(name)); | |
3102 Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize(); | |
3103 CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS); | |
3104 } | |
3105 __ bind(&done); | |
3106 } | |
3107 | |
3108 | |
3109 void LCodeGen::DoLoadNamedGeneric(LLoadNamedGeneric* instr) { | 3024 void LCodeGen::DoLoadNamedGeneric(LLoadNamedGeneric* instr) { |
3110 ASSERT(ToRegister(instr->object()).is(r0)); | 3025 ASSERT(ToRegister(instr->object()).is(r0)); |
3111 ASSERT(ToRegister(instr->result()).is(r0)); | 3026 ASSERT(ToRegister(instr->result()).is(r0)); |
3112 | 3027 |
3113 // Name is always in r2. | 3028 // Name is always in r2. |
3114 __ mov(r2, Operand(instr->name())); | 3029 __ mov(r2, Operand(instr->name())); |
3115 Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize(); | 3030 Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize(); |
3116 CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS); | 3031 CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS); |
3117 } | 3032 } |
3118 | 3033 |
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5839 __ sub(scratch, result, Operand::PointerOffsetFromSmiKey(index)); | 5754 __ sub(scratch, result, Operand::PointerOffsetFromSmiKey(index)); |
5840 __ ldr(result, FieldMemOperand(scratch, | 5755 __ ldr(result, FieldMemOperand(scratch, |
5841 FixedArray::kHeaderSize - kPointerSize)); | 5756 FixedArray::kHeaderSize - kPointerSize)); |
5842 __ bind(&done); | 5757 __ bind(&done); |
5843 } | 5758 } |
5844 | 5759 |
5845 | 5760 |
5846 #undef __ | 5761 #undef __ |
5847 | 5762 |
5848 } } // namespace v8::internal | 5763 } } // namespace v8::internal |
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