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src/share/vm/c1/c1_ValueType.cpp@a61af66fc99e (annotated)

src/share/vm/c1/c1_ValueType.cpp

Sat, 01 Dec 2007 00:00:00 +0000

author

duke

date

Sat, 01 Dec 2007 00:00:00 +0000

changeset 435

a61af66fc99e

child 1424

148e5441d916

permissions

-rw-r--r--

Initial load

duke@435	1	/*
duke@435	2	* Copyright 1999-2005 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	# include "incls/_precompiled.incl"
duke@435	26	# include "incls/_c1_ValueType.cpp.incl"
duke@435	27
duke@435	28
duke@435	29	// predefined types
duke@435	30	VoidType* voidType = NULL;
duke@435	31	IntType* intType = NULL;
duke@435	32	LongType* longType = NULL;
duke@435	33	FloatType* floatType = NULL;
duke@435	34	DoubleType* doubleType = NULL;
duke@435	35	ObjectType* objectType = NULL;
duke@435	36	ArrayType* arrayType = NULL;
duke@435	37	InstanceType* instanceType = NULL;
duke@435	38	ClassType* classType = NULL;
duke@435	39	AddressType* addressType = NULL;
duke@435	40	IllegalType* illegalType = NULL;
duke@435	41
duke@435	42
duke@435	43	// predefined constants
duke@435	44	IntConstant* intZero = NULL;
duke@435	45	IntConstant* intOne = NULL;
duke@435	46	ObjectConstant* objectNull = NULL;
duke@435	47
duke@435	48
duke@435	49	void ValueType::initialize() {
duke@435	50	// Note: Must initialize all types for each compilation
duke@435	51	// as they are allocated within a ResourceMark!
duke@435	52
duke@435	53	// types
duke@435	54	voidType = new VoidType();
duke@435	55	intType = new IntType();
duke@435	56	longType = new LongType();
duke@435	57	floatType = new FloatType();
duke@435	58	doubleType = new DoubleType();
duke@435	59	objectType = new ObjectType();
duke@435	60	arrayType = new ArrayType();
duke@435	61	instanceType = new InstanceType();
duke@435	62	classType = new ClassType();
duke@435	63	addressType = new AddressType();
duke@435	64	illegalType = new IllegalType();
duke@435	65
duke@435	66	// constants
duke@435	67	intZero = new IntConstant(0);
duke@435	68	intOne = new IntConstant(1);
duke@435	69	objectNull = new ObjectConstant(ciNullObject::make());
duke@435	70	};
duke@435	71
duke@435	72
duke@435	73	ValueType* ValueType::meet(ValueType* y) const {
duke@435	74	// incomplete & conservative solution for now - fix this!
duke@435	75	assert(tag() == y->tag(), "types must match");
duke@435	76	return base();
duke@435	77	}
duke@435	78
duke@435	79
duke@435	80	ValueType* ValueType::join(ValueType* y) const {
duke@435	81	Unimplemented();
duke@435	82	return NULL;
duke@435	83	}
duke@435	84
duke@435	85
duke@435	86
duke@435	87	jobject ObjectType::encoding() const {
duke@435	88	assert(is_constant(), "must be");
duke@435	89	return constant_value()->encoding();
duke@435	90	}
duke@435	91
duke@435	92	bool ObjectType::is_loaded() const {
duke@435	93	assert(is_constant(), "must be");
duke@435	94	return constant_value()->is_loaded();
duke@435	95	}
duke@435	96
duke@435	97	ciObject* ObjectConstant::constant_value() const { return _value; }
duke@435	98	ciObject* ArrayConstant::constant_value() const { return _value; }
duke@435	99	ciObject* InstanceConstant::constant_value() const { return _value; }
duke@435	100	ciObject* ClassConstant::constant_value() const { return _value; }
duke@435	101
duke@435	102
duke@435	103	ValueType* as_ValueType(BasicType type) {
duke@435	104	switch (type) {
duke@435	105	case T_VOID : return voidType;
duke@435	106	case T_BYTE : // fall through
duke@435	107	case T_CHAR : // fall through
duke@435	108	case T_SHORT : // fall through
duke@435	109	case T_BOOLEAN: // fall through
duke@435	110	case T_INT : return intType;
duke@435	111	case T_LONG : return longType;
duke@435	112	case T_FLOAT : return floatType;
duke@435	113	case T_DOUBLE : return doubleType;
duke@435	114	case T_ARRAY : return arrayType;
duke@435	115	case T_OBJECT : return objectType;
duke@435	116	case T_ADDRESS: return addressType;
duke@435	117	case T_ILLEGAL: return illegalType;
duke@435	118	}
duke@435	119	ShouldNotReachHere();
duke@435	120	return illegalType;
duke@435	121	}
duke@435	122
duke@435	123
duke@435	124	ValueType* as_ValueType(ciConstant value) {
duke@435	125	switch (value.basic_type()) {
duke@435	126	case T_BYTE : // fall through
duke@435	127	case T_CHAR : // fall through
duke@435	128	case T_SHORT : // fall through
duke@435	129	case T_BOOLEAN: // fall through
duke@435	130	case T_INT : return new IntConstant (value.as_int ());
duke@435	131	case T_LONG : return new LongConstant (value.as_long ());
duke@435	132	case T_FLOAT : return new FloatConstant (value.as_float ());
duke@435	133	case T_DOUBLE : return new DoubleConstant(value.as_double());
duke@435	134	case T_ARRAY : // fall through (ciConstant doesn't have an array accessor)
duke@435	135	case T_OBJECT : return new ObjectConstant(value.as_object());
duke@435	136	}
duke@435	137	ShouldNotReachHere();
duke@435	138	return illegalType;
duke@435	139	}
duke@435	140
duke@435	141
duke@435	142	BasicType as_BasicType(ValueType* type) {
duke@435	143	switch (type->tag()) {
duke@435	144	case voidTag: return T_VOID;
duke@435	145	case intTag: return T_INT;
duke@435	146	case longTag: return T_LONG;
duke@435	147	case floatTag: return T_FLOAT;
duke@435	148	case doubleTag: return T_DOUBLE;
duke@435	149	case objectTag: return T_OBJECT;
duke@435	150	case addressTag: return T_ADDRESS;
duke@435	151	case illegalTag: return T_ILLEGAL;
duke@435	152	}
duke@435	153	ShouldNotReachHere();
duke@435	154	return T_ILLEGAL;
duke@435	155	}