Mercurial > hg > truffle
annotate src/share/vm/ci/ciType.hpp @ 1905:ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
Reviewed-by: kvn, twisti
author | never |
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date | Tue, 19 Oct 2010 16:14:34 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 // ciType | |
26 // | |
27 // This class represents either a class (T_OBJECT), array (T_ARRAY), | |
28 // or one of the primitive types such as T_INT. | |
29 class ciType : public ciObject { | |
30 CI_PACKAGE_ACCESS | |
31 friend class ciKlass; | |
32 friend class ciReturnAddress; | |
33 | |
34 private: | |
35 BasicType _basic_type; | |
36 | |
37 ciType(BasicType t); // for the primitive types only | |
38 ciType(KlassHandle k); // for subclasses (reference types) | |
39 ciType(ciKlass* klass); // for unloaded types | |
40 | |
41 const char* type_string() { return "ciType"; } | |
42 | |
43 void print_impl(outputStream* st); | |
44 | |
45 // Distinguished instances of primitive ciTypes.. | |
46 static ciType* _basic_types[T_CONFLICT+1]; | |
47 | |
48 public: | |
49 BasicType basic_type() const { return _basic_type; } | |
50 | |
51 // Returns true iff the types are identical, or if both are klasses | |
52 // and the is_subtype_of relation holds between the klasses. | |
53 bool is_subtype_of(ciType* type); | |
54 | |
55 // Get the instance of java.lang.Class corresponding to this type. | |
56 // There are mirrors for instance, array, and primitive types (incl. void). | |
57 virtual ciInstance* java_mirror(); | |
58 | |
59 // Get the class which "boxes" (or "wraps") values of this type. | |
60 // Example: short is boxed by java.lang.Short, etc. | |
61 // Returns self if it is a reference type. | |
62 // Returns NULL for void, since null is used in such cases. | |
63 ciKlass* box_klass(); | |
64 | |
65 // Returns true if this is not a klass or array (i.e., not a reference type). | |
66 bool is_primitive_type() const { return basic_type() != T_OBJECT && basic_type() != T_ARRAY; } | |
67 int size() const { return type2size[basic_type()]; } | |
68 bool is_void() const { return basic_type() == T_VOID; } | |
69 bool is_one_word() const { return size() == 1; } | |
70 bool is_two_word() const { return size() == 2; } | |
71 | |
72 // What kind of ciObject is this? | |
73 bool is_type() { return true; } | |
74 bool is_classless() const { return is_primitive_type(); } | |
75 | |
76 virtual void print_name_on(outputStream* st); | |
77 void print_name() { | |
78 print_name_on(tty); | |
79 } | |
80 | |
81 static ciType* make(BasicType t); | |
82 }; | |
83 | |
84 | |
85 // ciReturnAddress | |
86 // | |
87 // This class represents the type of a specific return address in the | |
88 // bytecodes. | |
89 class ciReturnAddress : public ciType { | |
90 CI_PACKAGE_ACCESS | |
91 | |
92 private: | |
93 // The bci of this return address. | |
94 int _bci; | |
95 | |
96 ciReturnAddress(int bci); | |
97 | |
98 const char* type_string() { return "ciReturnAddress"; } | |
99 | |
100 void print_impl(outputStream* st); | |
101 | |
102 public: | |
103 bool is_return_address() { return true; } | |
104 | |
105 int bci() { return _bci; } | |
106 | |
107 static ciReturnAddress* make(int bci); | |
108 }; |