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Side by Side Diff: src/hydrogen-types.h

Issue 1405363003: Move Hydrogen and Lithium to src/crankshaft/ (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: rebased Created 5 years, 2 months ago
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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
3 // found in the LICENSE file.
4
5 #ifndef HYDROGEN_TYPES_H_
6 #define HYDROGEN_TYPES_H_
7
8 #include <climits>
9 #include <iosfwd>
10
11 #include "src/base/macros.h"
12
13 namespace v8 {
14 namespace internal {
15
16 // Forward declarations.
17 template <typename T> class Handle;
18 class Object;
19
20 #define HTYPE_LIST(V) \
21 V(Any, 0x0) /* 0000 0000 0000 0000 */ \
22 V(Tagged, 0x1) /* 0000 0000 0000 0001 */ \
23 V(TaggedPrimitive, 0x5) /* 0000 0000 0000 0101 */ \
24 V(TaggedNumber, 0xd) /* 0000 0000 0000 1101 */ \
25 V(Smi, 0x1d) /* 0000 0000 0001 1101 */ \
26 V(HeapObject, 0x21) /* 0000 0000 0010 0001 */ \
27 V(HeapPrimitive, 0x25) /* 0000 0000 0010 0101 */ \
28 V(Null, 0x27) /* 0000 0000 0010 0111 */ \
29 V(HeapNumber, 0x2d) /* 0000 0000 0010 1101 */ \
30 V(String, 0x65) /* 0000 0000 0110 0101 */ \
31 V(Boolean, 0xa5) /* 0000 0000 1010 0101 */ \
32 V(Undefined, 0x125) /* 0000 0001 0010 0101 */ \
33 V(JSReceiver, 0x221) /* 0000 0010 0010 0001 */ \
34 V(JSObject, 0x621) /* 0000 0110 0010 0001 */ \
35 V(JSArray, 0xe21) /* 0000 1110 0010 0001 */ \
36 V(None, 0xfff) /* 0000 1111 1111 1111 */
37
38 class HType final {
39 public:
40 #define DECLARE_CONSTRUCTOR(Name, mask) \
41 static HType Name() WARN_UNUSED_RESULT { return HType(k##Name); }
42 HTYPE_LIST(DECLARE_CONSTRUCTOR)
43 #undef DECLARE_CONSTRUCTOR
44
45 // Return the weakest (least precise) common type.
46 HType Combine(HType other) const WARN_UNUSED_RESULT {
47 return HType(static_cast<Kind>(kind_ & other.kind_));
48 }
49
50 bool Equals(HType other) const WARN_UNUSED_RESULT {
51 return kind_ == other.kind_;
52 }
53
54 bool IsSubtypeOf(HType other) const WARN_UNUSED_RESULT {
55 return Combine(other).Equals(other);
56 }
57
58 #define DECLARE_IS_TYPE(Name, mask) \
59 bool Is##Name() const WARN_UNUSED_RESULT { \
60 return IsSubtypeOf(HType::Name()); \
61 }
62 HTYPE_LIST(DECLARE_IS_TYPE)
63 #undef DECLARE_IS_TYPE
64
65 template <class T>
66 static HType FromType(typename T::TypeHandle type) WARN_UNUSED_RESULT;
67 static HType FromValue(Handle<Object> value) WARN_UNUSED_RESULT;
68
69 friend std::ostream& operator<<(std::ostream& os, const HType& t);
70
71 private:
72 enum Kind {
73 #define DECLARE_TYPE(Name, mask) k##Name = mask,
74 HTYPE_LIST(DECLARE_TYPE)
75 #undef DECLARE_TYPE
76 LAST_KIND = kNone
77 };
78
79 // Make sure type fits in int16.
80 STATIC_ASSERT(LAST_KIND < (1 << (CHAR_BIT * sizeof(int16_t))));
81
82 explicit HType(Kind kind) : kind_(kind) { }
83
84 int16_t kind_;
85 };
86
87
88 std::ostream& operator<<(std::ostream& os, const HType& t);
89 } // namespace internal
90 } // namespace v8
91
92 #endif // HYDROGEN_TYPES_H_
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