Mercurial > hg > truffle
diff src/share/vm/ci/ciType.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/ci/ciType.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,108 @@ +/* + * Copyright 2000-2001 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// ciType +// +// This class represents either a class (T_OBJECT), array (T_ARRAY), +// or one of the primitive types such as T_INT. +class ciType : public ciObject { + CI_PACKAGE_ACCESS + friend class ciKlass; + friend class ciReturnAddress; + +private: + BasicType _basic_type; + + ciType(BasicType t); // for the primitive types only + ciType(KlassHandle k); // for subclasses (reference types) + ciType(ciKlass* klass); // for unloaded types + + const char* type_string() { return "ciType"; } + + void print_impl(outputStream* st); + + // Distinguished instances of primitive ciTypes.. + static ciType* _basic_types[T_CONFLICT+1]; + +public: + BasicType basic_type() const { return _basic_type; } + + // Returns true iff the types are identical, or if both are klasses + // and the is_subtype_of relation holds between the klasses. + bool is_subtype_of(ciType* type); + + // Get the instance of java.lang.Class corresponding to this type. + // There are mirrors for instance, array, and primitive types (incl. void). + virtual ciInstance* java_mirror(); + + // Get the class which "boxes" (or "wraps") values of this type. + // Example: short is boxed by java.lang.Short, etc. + // Returns self if it is a reference type. + // Returns NULL for void, since null is used in such cases. + ciKlass* box_klass(); + + // Returns true if this is not a klass or array (i.e., not a reference type). + bool is_primitive_type() const { return basic_type() != T_OBJECT && basic_type() != T_ARRAY; } + int size() const { return type2size[basic_type()]; } + bool is_void() const { return basic_type() == T_VOID; } + bool is_one_word() const { return size() == 1; } + bool is_two_word() const { return size() == 2; } + + // What kind of ciObject is this? + bool is_type() { return true; } + bool is_classless() const { return is_primitive_type(); } + + virtual void print_name_on(outputStream* st); + void print_name() { + print_name_on(tty); + } + + static ciType* make(BasicType t); +}; + + +// ciReturnAddress +// +// This class represents the type of a specific return address in the +// bytecodes. +class ciReturnAddress : public ciType { + CI_PACKAGE_ACCESS + +private: + // The bci of this return address. + int _bci; + + ciReturnAddress(int bci); + + const char* type_string() { return "ciReturnAddress"; } + + void print_impl(outputStream* st); + +public: + bool is_return_address() { return true; } + + int bci() { return _bci; } + + static ciReturnAddress* make(int bci); +};