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src/share/vm/c1/c1_ValueType.cpp@710a3c8b516e (annotated)

src/share/vm/c1/c1_ValueType.cpp

Tue, 08 Aug 2017 15:57:29 +0800

author

aoqi

date

Tue, 08 Aug 2017 15:57:29 +0800

changeset 6876

710a3c8b516e

parent 4051

8a02ca5e5576

parent 0

f90c822e73f8

child 8604

04d83ba48607

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#include "precompiled.hpp"
aoqi@0	26	#include "c1/c1_ValueType.hpp"
aoqi@0	27	#include "ci/ciArray.hpp"
aoqi@0	28	#include "ci/ciInstance.hpp"
aoqi@0	29	#include "ci/ciNullObject.hpp"
aoqi@0	30
aoqi@0	31
aoqi@0	32	// predefined types
aoqi@0	33	VoidType* voidType = NULL;
aoqi@0	34	IntType* intType = NULL;
aoqi@0	35	LongType* longType = NULL;
aoqi@0	36	FloatType* floatType = NULL;
aoqi@0	37	DoubleType* doubleType = NULL;
aoqi@0	38	ObjectType* objectType = NULL;
aoqi@0	39	ArrayType* arrayType = NULL;
aoqi@0	40	InstanceType* instanceType = NULL;
aoqi@0	41	ClassType* classType = NULL;
aoqi@0	42	AddressType* addressType = NULL;
aoqi@0	43	IllegalType* illegalType = NULL;
aoqi@0	44
aoqi@0	45
aoqi@0	46	// predefined constants
aoqi@0	47	IntConstant* intZero = NULL;
aoqi@0	48	IntConstant* intOne = NULL;
aoqi@0	49	ObjectConstant* objectNull = NULL;
aoqi@0	50
aoqi@0	51
aoqi@0	52	void ValueType::initialize(Arena* arena) {
aoqi@0	53	// Note: Must initialize all types for each compilation
aoqi@0	54	// as they are allocated within a ResourceMark!
aoqi@0	55
aoqi@0	56	// types
aoqi@0	57	voidType = new (arena) VoidType();
aoqi@0	58	intType = new (arena) IntType();
aoqi@0	59	longType = new (arena) LongType();
aoqi@0	60	floatType = new (arena) FloatType();
aoqi@0	61	doubleType = new (arena) DoubleType();
aoqi@0	62	objectType = new (arena) ObjectType();
aoqi@0	63	arrayType = new (arena) ArrayType();
aoqi@0	64	instanceType = new (arena) InstanceType();
aoqi@0	65	classType = new (arena) ClassType();
aoqi@0	66	addressType = new (arena) AddressType();
aoqi@0	67	illegalType = new (arena) IllegalType();
aoqi@0	68
aoqi@0	69	intZero = new (arena) IntConstant(0);
aoqi@0	70	intOne = new (arena) IntConstant(1);
aoqi@0	71	objectNull = new (arena) ObjectConstant(ciNullObject::make());
aoqi@0	72	};
aoqi@0	73
aoqi@0	74
aoqi@0	75	ValueType* ValueType::meet(ValueType* y) const {
aoqi@0	76	// incomplete & conservative solution for now - fix this!
aoqi@0	77	assert(tag() == y->tag(), "types must match");
aoqi@0	78	return base();
aoqi@0	79	}
aoqi@0	80
aoqi@0	81
aoqi@0	82	ValueType* ValueType::join(ValueType* y) const {
aoqi@0	83	Unimplemented();
aoqi@0	84	return NULL;
aoqi@0	85	}
aoqi@0	86
aoqi@0	87
aoqi@0	88	ciType* ObjectConstant::exact_type() const {
aoqi@0	89	ciObject* c = constant_value();
aoqi@0	90	return (c != NULL && !c->is_null_object()) ? c->klass() : NULL;
aoqi@0	91	}
aoqi@0	92	ciType* ArrayConstant::exact_type() const {
aoqi@0	93	ciObject* c = constant_value();
aoqi@0	94	return (c != NULL && !c->is_null_object()) ? c->klass() : NULL;
aoqi@0	95	}
aoqi@0	96	ciType* InstanceConstant::exact_type() const {
aoqi@0	97	ciObject* c = constant_value();
aoqi@0	98	return (c != NULL && !c->is_null_object()) ? c->klass() : NULL;
aoqi@0	99	}
aoqi@0	100	ciType* ClassConstant::exact_type() const {
aoqi@0	101	return Compilation::current()->env()->Class_klass();
aoqi@0	102	}
aoqi@0	103
aoqi@0	104
aoqi@0	105	jobject ObjectType::encoding() const {
aoqi@0	106	assert(is_constant(), "must be");
aoqi@0	107	return constant_value()->constant_encoding();
aoqi@0	108	}
aoqi@0	109
aoqi@0	110	bool ObjectType::is_loaded() const {
aoqi@0	111	assert(is_constant(), "must be");
aoqi@0	112	return constant_value()->is_loaded();
aoqi@0	113	}
aoqi@0	114
aoqi@0	115	bool MetadataType::is_loaded() const {
aoqi@0	116	assert(is_constant(), "must be");
aoqi@0	117	return constant_value()->is_loaded();
aoqi@0	118	}
aoqi@0	119
aoqi@0	120	ciObject* ObjectConstant::constant_value() const { return _value; }
aoqi@0	121	ciObject* ArrayConstant::constant_value() const { return _value; }
aoqi@0	122	ciObject* InstanceConstant::constant_value() const { return _value; }
aoqi@0	123
aoqi@0	124	ValueType* as_ValueType(BasicType type) {
aoqi@0	125	switch (type) {
aoqi@0	126	case T_VOID : return voidType;
aoqi@0	127	case T_BYTE : // fall through
aoqi@0	128	case T_CHAR : // fall through
aoqi@0	129	case T_SHORT : // fall through
aoqi@0	130	case T_BOOLEAN: // fall through
aoqi@0	131	case T_INT : return intType;
aoqi@0	132	case T_LONG : return longType;
aoqi@0	133	case T_FLOAT : return floatType;
aoqi@0	134	case T_DOUBLE : return doubleType;
aoqi@0	135	case T_ARRAY : return arrayType;
aoqi@0	136	case T_OBJECT : return objectType;
aoqi@0	137	case T_ADDRESS: return addressType;
aoqi@0	138	case T_ILLEGAL: return illegalType;
aoqi@0	139	}
aoqi@0	140	ShouldNotReachHere();
aoqi@0	141	return illegalType;
aoqi@0	142	}
aoqi@0	143
aoqi@0	144
aoqi@0	145	ValueType* as_ValueType(ciConstant value) {
aoqi@0	146	switch (value.basic_type()) {
aoqi@0	147	case T_BYTE : // fall through
aoqi@0	148	case T_CHAR : // fall through
aoqi@0	149	case T_SHORT : // fall through
aoqi@0	150	case T_BOOLEAN: // fall through
aoqi@0	151	case T_INT : return new IntConstant (value.as_int ());
aoqi@0	152	case T_LONG : return new LongConstant (value.as_long ());
aoqi@0	153	case T_FLOAT : return new FloatConstant (value.as_float ());
aoqi@0	154	case T_DOUBLE : return new DoubleConstant(value.as_double());
aoqi@0	155	case T_ARRAY : // fall through (ciConstant doesn't have an array accessor)
aoqi@0	156	case T_OBJECT : return new ObjectConstant(value.as_object());
aoqi@0	157	}
aoqi@0	158	ShouldNotReachHere();
aoqi@0	159	return illegalType;
aoqi@0	160	}
aoqi@0	161
aoqi@0	162
aoqi@0	163	BasicType as_BasicType(ValueType* type) {
aoqi@0	164	switch (type->tag()) {
aoqi@0	165	case voidTag: return T_VOID;
aoqi@0	166	case intTag: return T_INT;
aoqi@0	167	case longTag: return T_LONG;
aoqi@0	168	case floatTag: return T_FLOAT;
aoqi@0	169	case doubleTag: return T_DOUBLE;
aoqi@0	170	case objectTag: return T_OBJECT;
aoqi@0	171	case metaDataTag:return T_METADATA;
aoqi@0	172	case addressTag: return T_ADDRESS;
aoqi@0	173	case illegalTag: return T_ILLEGAL;
aoqi@0	174	}
aoqi@0	175	ShouldNotReachHere();
aoqi@0	176	return T_ILLEGAL;
aoqi@0	177	}