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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_COMPILER_SIMPLIFIED_OPERATOR_H_ | 5 #ifndef V8_COMPILER_SIMPLIFIED_OPERATOR_H_ |
6 #define V8_COMPILER_SIMPLIFIED_OPERATOR_H_ | 6 #define V8_COMPILER_SIMPLIFIED_OPERATOR_H_ |
7 | 7 |
8 #include "src/compiler/machine-operator.h" | 8 #include "src/compiler/machine-operator.h" |
9 #include "src/compiler/opcodes.h" | 9 #include "src/compiler/opcodes.h" |
10 #include "src/zone.h" | 10 #include "src/zone.h" |
11 | 11 |
12 namespace v8 { | 12 namespace v8 { |
13 namespace internal { | 13 namespace internal { |
14 namespace compiler { | 14 namespace compiler { |
15 | 15 |
16 enum BaseTaggedness { kUntaggedBase, kTaggedBase }; | 16 enum BaseTaggedness { kUntaggedBase, kTaggedBase }; |
17 | 17 |
18 // An access descriptor for loads/stores of fixed structures like field | 18 // An access descriptor for loads/stores of fixed structures like field |
19 // accesses of heap objects. Accesses from either tagged or untagged base | 19 // accesses of heap objects. Accesses from either tagged or untagged base |
20 // pointers are supported; untagging is done automatically during lowering. | 20 // pointers are supported; untagging is done automatically during lowering. |
21 struct FieldAccess { | 21 struct FieldAccess { |
22 BaseTaggedness base_is_tagged; // specifies if the base pointer is tagged. | 22 BaseTaggedness base_is_tagged; // specifies if the base pointer is tagged. |
23 int offset; // offset of the field, without tag. | 23 int offset; // offset of the field, without tag. |
24 Handle<Name> name; // debugging only. | 24 Handle<Name> name; // debugging only. |
25 Type* type; // type of the field. | 25 Type* type; // type of the field. |
26 MachineRepresentation representation; // machine representation of field. | 26 MachineType representation; // machine representation of field. |
27 | 27 |
28 int tag() const { return base_is_tagged == kTaggedBase ? kHeapObjectTag : 0; } | 28 int tag() const { return base_is_tagged == kTaggedBase ? kHeapObjectTag : 0; } |
29 }; | 29 }; |
30 | 30 |
31 | 31 |
32 // An access descriptor for loads/stores of indexed structures like characters | 32 // An access descriptor for loads/stores of indexed structures like characters |
33 // in strings or off-heap backing stores. Accesses from either tagged or | 33 // in strings or off-heap backing stores. Accesses from either tagged or |
34 // untagged base pointers are supported; untagging is done automatically during | 34 // untagged base pointers are supported; untagging is done automatically during |
35 // lowering. | 35 // lowering. |
36 struct ElementAccess { | 36 struct ElementAccess { |
37 BaseTaggedness base_is_tagged; // specifies if the base pointer is tagged. | 37 BaseTaggedness base_is_tagged; // specifies if the base pointer is tagged. |
38 int header_size; // size of the header, without tag. | 38 int header_size; // size of the header, without tag. |
39 Type* type; // type of the element. | 39 Type* type; // type of the element. |
40 MachineRepresentation representation; // machine representation of element. | 40 MachineType representation; // machine representation of element. |
41 | 41 |
42 int tag() const { return base_is_tagged == kTaggedBase ? kHeapObjectTag : 0; } | 42 int tag() const { return base_is_tagged == kTaggedBase ? kHeapObjectTag : 0; } |
43 }; | 43 }; |
44 | 44 |
45 | 45 |
46 // If the accessed object is not a heap object, add this to the header_size. | 46 // If the accessed object is not a heap object, add this to the header_size. |
47 static const int kNonHeapObjectHeaderSize = kHeapObjectTag; | 47 static const int kNonHeapObjectHeaderSize = kHeapObjectTag; |
48 | 48 |
49 | 49 |
50 // Specialization for static parameters of type {FieldAccess}. | 50 // Specialization for static parameters of type {FieldAccess}. |
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180 #undef SIMPLE | 180 #undef SIMPLE |
181 | 181 |
182 private: | 182 private: |
183 Zone* zone_; | 183 Zone* zone_; |
184 }; | 184 }; |
185 } | 185 } |
186 } | 186 } |
187 } // namespace v8::internal::compiler | 187 } // namespace v8::internal::compiler |
188 | 188 |
189 #endif // V8_COMPILER_SIMPLIFIED_OPERATOR_H_ | 189 #endif // V8_COMPILER_SIMPLIFIED_OPERATOR_H_ |
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