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src/share/vm/c1/c1_ValueType.cpp@8a02ca5e5576 (annotated)

src/share/vm/c1/c1_ValueType.cpp

Tue, 11 Sep 2012 16:20:57 +0200

author

roland

date

Tue, 11 Sep 2012 16:20:57 +0200

changeset 4051

8a02ca5e5576

parent 4037

da91efe96a93

child 6876

710a3c8b516e

child 8203

2b597b92442b

permissions

-rw-r--r--

7195816: NPG: Crash in c1_ValueType - ShouldNotReachHere
Summary: C1 needs knowledge of T_METADATA at the LIR level.
Reviewed-by: kvn, coleenp

duke@435	1	/*
coleenp@4037	2	* Copyright (c) 1999, 2012, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#include "precompiled.hpp"
stefank@2314	26	#include "c1/c1_ValueType.hpp"
stefank@2314	27	#include "ci/ciArray.hpp"
stefank@2314	28	#include "ci/ciInstance.hpp"
stefank@2314	29	#include "ci/ciNullObject.hpp"
duke@435	30
duke@435	31
duke@435	32	// predefined types
duke@435	33	VoidType* voidType = NULL;
duke@435	34	IntType* intType = NULL;
duke@435	35	LongType* longType = NULL;
duke@435	36	FloatType* floatType = NULL;
duke@435	37	DoubleType* doubleType = NULL;
duke@435	38	ObjectType* objectType = NULL;
duke@435	39	ArrayType* arrayType = NULL;
duke@435	40	InstanceType* instanceType = NULL;
duke@435	41	ClassType* classType = NULL;
duke@435	42	AddressType* addressType = NULL;
duke@435	43	IllegalType* illegalType = NULL;
duke@435	44
duke@435	45
duke@435	46	// predefined constants
duke@435	47	IntConstant* intZero = NULL;
duke@435	48	IntConstant* intOne = NULL;
duke@435	49	ObjectConstant* objectNull = NULL;
duke@435	50
duke@435	51
iveresov@1939	52	void ValueType::initialize(Arena* arena) {
duke@435	53	// Note: Must initialize all types for each compilation
duke@435	54	// as they are allocated within a ResourceMark!
duke@435	55
duke@435	56	// types
iveresov@1939	57	voidType = new (arena) VoidType();
iveresov@1939	58	intType = new (arena) IntType();
iveresov@1939	59	longType = new (arena) LongType();
iveresov@1939	60	floatType = new (arena) FloatType();
iveresov@1939	61	doubleType = new (arena) DoubleType();
iveresov@1939	62	objectType = new (arena) ObjectType();
iveresov@1939	63	arrayType = new (arena) ArrayType();
iveresov@1939	64	instanceType = new (arena) InstanceType();
iveresov@1939	65	classType = new (arena) ClassType();
iveresov@1939	66	addressType = new (arena) AddressType();
iveresov@1939	67	illegalType = new (arena) IllegalType();
duke@435	68
iveresov@1939	69	intZero = new (arena) IntConstant(0);
iveresov@1939	70	intOne = new (arena) IntConstant(1);
iveresov@1939	71	objectNull = new (arena) ObjectConstant(ciNullObject::make());
duke@435	72	};
duke@435	73
duke@435	74
duke@435	75	ValueType* ValueType::meet(ValueType* y) const {
duke@435	76	// incomplete & conservative solution for now - fix this!
duke@435	77	assert(tag() == y->tag(), "types must match");
duke@435	78	return base();
duke@435	79	}
duke@435	80
duke@435	81
duke@435	82	ValueType* ValueType::join(ValueType* y) const {
duke@435	83	Unimplemented();
duke@435	84	return NULL;
duke@435	85	}
duke@435	86
duke@435	87
twisti@3969	88	ciType* ObjectConstant::exact_type() const {
twisti@3969	89	ciObject* c = constant_value();
twisti@3969	90	return (c != NULL && !c->is_null_object()) ? c->klass() : NULL;
twisti@3969	91	}
twisti@3969	92	ciType* ArrayConstant::exact_type() const {
twisti@3969	93	ciObject* c = constant_value();
twisti@3969	94	return (c != NULL && !c->is_null_object()) ? c->klass() : NULL;
twisti@3969	95	}
twisti@3969	96	ciType* InstanceConstant::exact_type() const {
twisti@3969	97	ciObject* c = constant_value();
twisti@3969	98	return (c != NULL && !c->is_null_object()) ? c->klass() : NULL;
twisti@3969	99	}
twisti@3969	100	ciType* ClassConstant::exact_type() const {
coleenp@4037	101	return Compilation::current()->env()->Class_klass();
twisti@3969	102	}
twisti@3969	103
duke@435	104
coleenp@4037	105	jobject ObjectType::encoding() const {
coleenp@4037	106	assert(is_constant(), "must be");
coleenp@4037	107	return constant_value()->constant_encoding();
coleenp@4037	108	}
coleenp@4037	109
coleenp@4037	110	bool ObjectType::is_loaded() const {
coleenp@4037	111	assert(is_constant(), "must be");
coleenp@4037	112	return constant_value()->is_loaded();
coleenp@4037	113	}
coleenp@4037	114
coleenp@4037	115	bool MetadataType::is_loaded() const {
coleenp@4037	116	assert(is_constant(), "must be");
coleenp@4037	117	return constant_value()->is_loaded();
coleenp@4037	118	}
coleenp@4037	119
coleenp@4037	120	ciObject* ObjectConstant::constant_value() const { return _value; }
coleenp@4037	121	ciObject* ArrayConstant::constant_value() const { return _value; }
coleenp@4037	122	ciObject* InstanceConstant::constant_value() const { return _value; }
coleenp@4037	123
duke@435	124	ValueType* as_ValueType(BasicType type) {
duke@435	125	switch (type) {
duke@435	126	case T_VOID : return voidType;
duke@435	127	case T_BYTE : // fall through
duke@435	128	case T_CHAR : // fall through
duke@435	129	case T_SHORT : // fall through
duke@435	130	case T_BOOLEAN: // fall through
duke@435	131	case T_INT : return intType;
duke@435	132	case T_LONG : return longType;
duke@435	133	case T_FLOAT : return floatType;
duke@435	134	case T_DOUBLE : return doubleType;
duke@435	135	case T_ARRAY : return arrayType;
duke@435	136	case T_OBJECT : return objectType;
duke@435	137	case T_ADDRESS: return addressType;
duke@435	138	case T_ILLEGAL: return illegalType;
duke@435	139	}
duke@435	140	ShouldNotReachHere();
duke@435	141	return illegalType;
duke@435	142	}
duke@435	143
duke@435	144
duke@435	145	ValueType* as_ValueType(ciConstant value) {
duke@435	146	switch (value.basic_type()) {
duke@435	147	case T_BYTE : // fall through
duke@435	148	case T_CHAR : // fall through
duke@435	149	case T_SHORT : // fall through
duke@435	150	case T_BOOLEAN: // fall through
duke@435	151	case T_INT : return new IntConstant (value.as_int ());
duke@435	152	case T_LONG : return new LongConstant (value.as_long ());
duke@435	153	case T_FLOAT : return new FloatConstant (value.as_float ());
duke@435	154	case T_DOUBLE : return new DoubleConstant(value.as_double());
duke@435	155	case T_ARRAY : // fall through (ciConstant doesn't have an array accessor)
duke@435	156	case T_OBJECT : return new ObjectConstant(value.as_object());
duke@435	157	}
duke@435	158	ShouldNotReachHere();
duke@435	159	return illegalType;
duke@435	160	}
duke@435	161
duke@435	162
duke@435	163	BasicType as_BasicType(ValueType* type) {
duke@435	164	switch (type->tag()) {
duke@435	165	case voidTag: return T_VOID;
duke@435	166	case intTag: return T_INT;
duke@435	167	case longTag: return T_LONG;
duke@435	168	case floatTag: return T_FLOAT;
duke@435	169	case doubleTag: return T_DOUBLE;
duke@435	170	case objectTag: return T_OBJECT;
roland@4051	171	case metaDataTag:return T_METADATA;
duke@435	172	case addressTag: return T_ADDRESS;
duke@435	173	case illegalTag: return T_ILLEGAL;
duke@435	174	}
duke@435	175	ShouldNotReachHere();
duke@435	176	return T_ILLEGAL;
duke@435	177	}