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1 // Copyright 2009 the V8 project authors. All rights reserved. | 1 // Copyright 2009 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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30 #include "codegen-inl.h" | 30 #include "codegen-inl.h" |
31 #include "register-allocator-inl.h" | 31 #include "register-allocator-inl.h" |
32 | 32 |
33 namespace v8 { | 33 namespace v8 { |
34 namespace internal { | 34 namespace internal { |
35 | 35 |
36 // ------------------------------------------------------------------------- | 36 // ------------------------------------------------------------------------- |
37 // Result implementation. | 37 // Result implementation. |
38 | 38 |
39 | 39 |
40 Result::Result(Register reg) { | 40 Result::Result(Register reg, NumberInfo::Type info) { |
41 ASSERT(reg.is_valid() && !RegisterAllocator::IsReserved(reg)); | 41 ASSERT(reg.is_valid() && !RegisterAllocator::IsReserved(reg)); |
42 CodeGeneratorScope::Current()->allocator()->Use(reg); | 42 CodeGeneratorScope::Current()->allocator()->Use(reg); |
43 value_ = TypeField::encode(REGISTER) | DataField::encode(reg.code_); | 43 value_ = TypeField::encode(REGISTER) |
| 44 | NumberInfoField::encode(info) |
| 45 | DataField::encode(reg.code_); |
44 } | 46 } |
45 | 47 |
46 | 48 |
47 Result::ZoneObjectList* Result::ConstantList() { | 49 Result::ZoneObjectList* Result::ConstantList() { |
48 static ZoneObjectList list(10); | 50 static ZoneObjectList list(10); |
49 return &list; | 51 return &list; |
50 } | 52 } |
51 | 53 |
52 | 54 |
| 55 NumberInfo::Type Result::number_info() { |
| 56 ASSERT(is_valid()); |
| 57 if (!is_constant()) return NumberInfoField::decode(value_); |
| 58 Handle<Object> value = handle(); |
| 59 if (value->IsSmi()) return NumberInfo::kSmi; |
| 60 if (value->IsHeapNumber()) return NumberInfo::kHeapNumber; |
| 61 return NumberInfo::kUnknown; |
| 62 } |
| 63 |
| 64 |
| 65 void Result::set_number_info(NumberInfo::Type info) { |
| 66 ASSERT(is_valid()); |
| 67 value_ = value_ & ~NumberInfoField::mask(); |
| 68 value_ = value_ | NumberInfoField::encode(info); |
| 69 } |
| 70 |
| 71 |
53 // ------------------------------------------------------------------------- | 72 // ------------------------------------------------------------------------- |
54 // RegisterAllocator implementation. | 73 // RegisterAllocator implementation. |
55 | 74 |
56 | 75 |
57 Result RegisterAllocator::AllocateWithoutSpilling() { | 76 Result RegisterAllocator::AllocateWithoutSpilling() { |
58 // Return the first free register, if any. | 77 // Return the first free register, if any. |
59 int num = registers_.ScanForFreeRegister(); | 78 int num = registers_.ScanForFreeRegister(); |
60 if (num == RegisterAllocator::kInvalidRegister) { | 79 if (num == RegisterAllocator::kInvalidRegister) { |
61 return Result(); | 80 return Result(); |
62 } | 81 } |
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91 cgen_->frame()->Spill(target); | 110 cgen_->frame()->Spill(target); |
92 ASSERT(!is_used(target)); | 111 ASSERT(!is_used(target)); |
93 return Result(target); | 112 return Result(target); |
94 } | 113 } |
95 // Otherwise (if it's referenced outside the frame) we cannot allocate it. | 114 // Otherwise (if it's referenced outside the frame) we cannot allocate it. |
96 return Result(); | 115 return Result(); |
97 } | 116 } |
98 | 117 |
99 | 118 |
100 } } // namespace v8::internal | 119 } } // namespace v8::internal |
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