Mercurial > hg > truffle
annotate src/share/vm/ci/ciType.hpp @ 14518:d8041d695d19
Merged with jdk9/dev/hotspot changeset 3812c088b945
| author | twisti |
|---|---|
| date | Tue, 11 Mar 2014 18:45:59 -0700 |
| parents | de6a9e811145 |
| children | 4ca6dc0799b6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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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 | |
| 1972 | 25 #ifndef SHARE_VM_CI_CITYPE_HPP |
| 26 #define SHARE_VM_CI_CITYPE_HPP | |
| 27 | |
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28 #include "ci/ciMetadata.hpp" |
| 1972 | 29 |
| 0 | 30 // ciType |
| 31 // | |
| 32 // This class represents either a class (T_OBJECT), array (T_ARRAY), | |
| 33 // or one of the primitive types such as T_INT. | |
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34 class ciType : public ciMetadata { |
| 0 | 35 CI_PACKAGE_ACCESS |
| 36 friend class ciKlass; | |
| 37 friend class ciReturnAddress; | |
| 38 | |
| 39 private: | |
| 40 BasicType _basic_type; | |
| 41 | |
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42 ciType(BasicType t); // for primitive and unloaded types |
| 0 | 43 ciType(KlassHandle k); // for subclasses (reference types) |
| 44 | |
| 45 const char* type_string() { return "ciType"; } | |
| 46 | |
| 47 void print_impl(outputStream* st); | |
| 48 | |
| 49 // Distinguished instances of primitive ciTypes.. | |
| 50 static ciType* _basic_types[T_CONFLICT+1]; | |
| 51 | |
| 52 public: | |
| 53 BasicType basic_type() const { return _basic_type; } | |
| 54 | |
| 55 // Returns true iff the types are identical, or if both are klasses | |
| 56 // and the is_subtype_of relation holds between the klasses. | |
| 57 bool is_subtype_of(ciType* type); | |
| 58 | |
| 59 // Get the instance of java.lang.Class corresponding to this type. | |
| 60 // There are mirrors for instance, array, and primitive types (incl. void). | |
| 61 virtual ciInstance* java_mirror(); | |
| 62 | |
| 63 // Get the class which "boxes" (or "wraps") values of this type. | |
| 64 // Example: short is boxed by java.lang.Short, etc. | |
| 65 // Returns self if it is a reference type. | |
| 66 // Returns NULL for void, since null is used in such cases. | |
| 67 ciKlass* box_klass(); | |
| 68 | |
| 69 // Returns true if this is not a klass or array (i.e., not a reference type). | |
| 70 bool is_primitive_type() const { return basic_type() != T_OBJECT && basic_type() != T_ARRAY; } | |
| 71 int size() const { return type2size[basic_type()]; } | |
| 72 bool is_void() const { return basic_type() == T_VOID; } | |
| 73 bool is_one_word() const { return size() == 1; } | |
| 74 bool is_two_word() const { return size() == 2; } | |
| 75 | |
| 76 // What kind of ciObject is this? | |
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77 bool is_type() const { return true; } |
| 0 | 78 bool is_classless() const { return is_primitive_type(); } |
| 79 | |
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80 const char* name(); |
| 0 | 81 virtual void print_name_on(outputStream* st); |
| 82 void print_name() { | |
| 83 print_name_on(tty); | |
| 84 } | |
| 85 | |
| 86 static ciType* make(BasicType t); | |
| 87 }; | |
| 88 | |
| 89 | |
| 90 // ciReturnAddress | |
| 91 // | |
| 92 // This class represents the type of a specific return address in the | |
| 93 // bytecodes. | |
| 94 class ciReturnAddress : public ciType { | |
| 95 CI_PACKAGE_ACCESS | |
| 96 | |
| 97 private: | |
| 98 // The bci of this return address. | |
| 99 int _bci; | |
| 100 | |
| 101 ciReturnAddress(int bci); | |
| 102 | |
| 103 const char* type_string() { return "ciReturnAddress"; } | |
| 104 | |
| 105 void print_impl(outputStream* st); | |
| 106 | |
| 107 public: | |
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108 bool is_return_address() const { return true; } |
| 0 | 109 |
| 110 int bci() { return _bci; } | |
| 111 | |
| 112 static ciReturnAddress* make(int bci); | |
| 113 }; | |
| 1972 | 114 |
| 115 #endif // SHARE_VM_CI_CITYPE_HPP |