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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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39 kSmi = 3, | 39 kSmi = 3, |
40 kHeapNumber = 5, | 40 kHeapNumber = 5, |
41 kUninitialized = 7 | 41 kUninitialized = 7 |
42 }; | 42 }; |
43 | 43 |
44 // Return the weakest (least precise) common type. | 44 // Return the weakest (least precise) common type. |
45 static Type Combine(Type a, Type b) { | 45 static Type Combine(Type a, Type b) { |
46 // Make use of the order of enum values. | 46 // Make use of the order of enum values. |
47 return static_cast<Type>(a & b); | 47 return static_cast<Type>(a & b); |
48 } | 48 } |
| 49 |
| 50 static bool IsNumber(Type a) { |
| 51 ASSERT(a != kUninitialized); |
| 52 return ((a & kNumber) != 0); |
| 53 } |
| 54 |
| 55 static const char* ToString(Type a) { |
| 56 switch (a) { |
| 57 case kUnknown: return "UnknownType"; |
| 58 case kNumber: return "NumberType"; |
| 59 case kSmi: return "SmiType"; |
| 60 case kHeapNumber: return "HeapNumberType"; |
| 61 case kUninitialized: |
| 62 UNREACHABLE(); |
| 63 return "UninitializedType"; |
| 64 } |
| 65 UNREACHABLE(); |
| 66 return "Unreachable code"; |
| 67 } |
| 68 |
49 }; | 69 }; |
50 | 70 |
51 } } // namespace v8::internal | 71 } } // namespace v8::internal |
52 | 72 |
53 #endif // V8_NUMBER_INFO_H_ | 73 #endif // V8_NUMBER_INFO_H_ |
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