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src/share/vm/opto/type.cpp@b0fe4deeb9fb (annotated)

src/share/vm/opto/type.cpp

Mon, 28 Jul 2008 17:12:52 -0700

author

kvn

date

Mon, 28 Jul 2008 17:12:52 -0700

changeset 688

b0fe4deeb9fb

parent 682

02a35ad4adf8

child 728

c3e045194476

permissions

-rw-r--r--

6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
Summary: Escape Analysis fixes.
Reviewed-by: never, rasbold

duke@435	1	/*
xdono@631	2	* Copyright 1997-2008 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	// Portions of code courtesy of Clifford Click
duke@435	26
duke@435	27	// Optimization - Graph Style
duke@435	28
duke@435	29	#include "incls/_precompiled.incl"
duke@435	30	#include "incls/_type.cpp.incl"
duke@435	31
duke@435	32	// Dictionary of types shared among compilations.
duke@435	33	Dict* Type::_shared_type_dict = NULL;
duke@435	34
duke@435	35	// Array which maps compiler types to Basic Types
duke@435	36	const BasicType Type::_basic_type[Type::lastype] = {
duke@435	37	T_ILLEGAL, // Bad
duke@435	38	T_ILLEGAL, // Control
duke@435	39	T_VOID, // Top
duke@435	40	T_INT, // Int
duke@435	41	T_LONG, // Long
duke@435	42	T_VOID, // Half
coleenp@548	43	T_NARROWOOP, // NarrowOop
duke@435	44
duke@435	45	T_ILLEGAL, // Tuple
duke@435	46	T_ARRAY, // Array
duke@435	47
duke@435	48	T_ADDRESS, // AnyPtr // shows up in factory methods for NULL_PTR
duke@435	49	T_ADDRESS, // RawPtr
duke@435	50	T_OBJECT, // OopPtr
duke@435	51	T_OBJECT, // InstPtr
duke@435	52	T_OBJECT, // AryPtr
duke@435	53	T_OBJECT, // KlassPtr
duke@435	54
duke@435	55	T_OBJECT, // Function
duke@435	56	T_ILLEGAL, // Abio
duke@435	57	T_ADDRESS, // Return_Address
duke@435	58	T_ILLEGAL, // Memory
duke@435	59	T_FLOAT, // FloatTop
duke@435	60	T_FLOAT, // FloatCon
duke@435	61	T_FLOAT, // FloatBot
duke@435	62	T_DOUBLE, // DoubleTop
duke@435	63	T_DOUBLE, // DoubleCon
duke@435	64	T_DOUBLE, // DoubleBot
duke@435	65	T_ILLEGAL, // Bottom
duke@435	66	};
duke@435	67
duke@435	68	// Map ideal registers (machine types) to ideal types
duke@435	69	const Type *Type::mreg2type[_last_machine_leaf];
duke@435	70
duke@435	71	// Map basic types to canonical Type* pointers.
duke@435	72	const Type* Type:: _const_basic_type[T_CONFLICT+1];
duke@435	73
duke@435	74	// Map basic types to constant-zero Types.
duke@435	75	const Type* Type:: _zero_type[T_CONFLICT+1];
duke@435	76
duke@435	77	// Map basic types to array-body alias types.
duke@435	78	const TypeAryPtr* TypeAryPtr::_array_body_type[T_CONFLICT+1];
duke@435	79
duke@435	80	//=============================================================================
duke@435	81	// Convenience common pre-built types.
duke@435	82	const Type *Type::ABIO; // State-of-machine only
duke@435	83	const Type *Type::BOTTOM; // All values
duke@435	84	const Type *Type::CONTROL; // Control only
duke@435	85	const Type *Type::DOUBLE; // All doubles
duke@435	86	const Type *Type::FLOAT; // All floats
duke@435	87	const Type *Type::HALF; // Placeholder half of doublewide type
duke@435	88	const Type *Type::MEMORY; // Abstract store only
duke@435	89	const Type *Type::RETURN_ADDRESS;
duke@435	90	const Type *Type::TOP; // No values in set
duke@435	91
duke@435	92	//------------------------------get_const_type---------------------------
duke@435	93	const Type* Type::get_const_type(ciType* type) {
duke@435	94	if (type == NULL) {
duke@435	95	return NULL;
duke@435	96	} else if (type->is_primitive_type()) {
duke@435	97	return get_const_basic_type(type->basic_type());
duke@435	98	} else {
duke@435	99	return TypeOopPtr::make_from_klass(type->as_klass());
duke@435	100	}
duke@435	101	}
duke@435	102
duke@435	103	//---------------------------array_element_basic_type---------------------------------
duke@435	104	// Mapping to the array element's basic type.
duke@435	105	BasicType Type::array_element_basic_type() const {
duke@435	106	BasicType bt = basic_type();
duke@435	107	if (bt == T_INT) {
duke@435	108	if (this == TypeInt::INT) return T_INT;
duke@435	109	if (this == TypeInt::CHAR) return T_CHAR;
duke@435	110	if (this == TypeInt::BYTE) return T_BYTE;
duke@435	111	if (this == TypeInt::BOOL) return T_BOOLEAN;
duke@435	112	if (this == TypeInt::SHORT) return T_SHORT;
duke@435	113	return T_VOID;
duke@435	114	}
duke@435	115	return bt;
duke@435	116	}
duke@435	117
duke@435	118	//---------------------------get_typeflow_type---------------------------------
duke@435	119	// Import a type produced by ciTypeFlow.
duke@435	120	const Type* Type::get_typeflow_type(ciType* type) {
duke@435	121	switch (type->basic_type()) {
duke@435	122
duke@435	123	case ciTypeFlow::StateVector::T_BOTTOM:
duke@435	124	assert(type == ciTypeFlow::StateVector::bottom_type(), "");
duke@435	125	return Type::BOTTOM;
duke@435	126
duke@435	127	case ciTypeFlow::StateVector::T_TOP:
duke@435	128	assert(type == ciTypeFlow::StateVector::top_type(), "");
duke@435	129	return Type::TOP;
duke@435	130
duke@435	131	case ciTypeFlow::StateVector::T_NULL:
duke@435	132	assert(type == ciTypeFlow::StateVector::null_type(), "");
duke@435	133	return TypePtr::NULL_PTR;
duke@435	134
duke@435	135	case ciTypeFlow::StateVector::T_LONG2:
duke@435	136	// The ciTypeFlow pass pushes a long, then the half.
duke@435	137	// We do the same.
duke@435	138	assert(type == ciTypeFlow::StateVector::long2_type(), "");
duke@435	139	return TypeInt::TOP;
duke@435	140
duke@435	141	case ciTypeFlow::StateVector::T_DOUBLE2:
duke@435	142	// The ciTypeFlow pass pushes double, then the half.
duke@435	143	// Our convention is the same.
duke@435	144	assert(type == ciTypeFlow::StateVector::double2_type(), "");
duke@435	145	return Type::TOP;
duke@435	146
duke@435	147	case T_ADDRESS:
duke@435	148	assert(type->is_return_address(), "");
duke@435	149	return TypeRawPtr::make((address)(intptr_t)type->as_return_address()->bci());
duke@435	150
duke@435	151	default:
duke@435	152	// make sure we did not mix up the cases:
duke@435	153	assert(type != ciTypeFlow::StateVector::bottom_type(), "");
duke@435	154	assert(type != ciTypeFlow::StateVector::top_type(), "");
duke@435	155	assert(type != ciTypeFlow::StateVector::null_type(), "");
duke@435	156	assert(type != ciTypeFlow::StateVector::long2_type(), "");
duke@435	157	assert(type != ciTypeFlow::StateVector::double2_type(), "");
duke@435	158	assert(!type->is_return_address(), "");
duke@435	159
duke@435	160	return Type::get_const_type(type);
duke@435	161	}
duke@435	162	}
duke@435	163
duke@435	164
duke@435	165	//------------------------------make-------------------------------------------
duke@435	166	// Create a simple Type, with default empty symbol sets. Then hashcons it
duke@435	167	// and look for an existing copy in the type dictionary.
duke@435	168	const Type *Type::make( enum TYPES t ) {
duke@435	169	return (new Type(t))->hashcons();
duke@435	170	}
kvn@658	171
duke@435	172	//------------------------------cmp--------------------------------------------
duke@435	173	int Type::cmp( const Type *const t1, const Type *const t2 ) {
duke@435	174	if( t1->_base != t2->_base )
duke@435	175	return 1; // Missed badly
duke@435	176	assert(t1 != t2 || t1->eq(t2), "eq must be reflexive");
duke@435	177	return !t1->eq(t2); // Return ZERO if equal
duke@435	178	}
duke@435	179
duke@435	180	//------------------------------hash-------------------------------------------
duke@435	181	int Type::uhash( const Type *const t ) {
duke@435	182	return t->hash();
duke@435	183	}
duke@435	184
duke@435	185	//--------------------------Initialize_shared----------------------------------
duke@435	186	void Type::Initialize_shared(Compile* current) {
duke@435	187	// This method does not need to be locked because the first system
duke@435	188	// compilations (stub compilations) occur serially. If they are
duke@435	189	// changed to proceed in parallel, then this section will need
duke@435	190	// locking.
duke@435	191
duke@435	192	Arena* save = current->type_arena();
duke@435	193	Arena* shared_type_arena = new Arena();
duke@435	194
duke@435	195	current->set_type_arena(shared_type_arena);
duke@435	196	_shared_type_dict =
duke@435	197	new (shared_type_arena) Dict( (CmpKey)Type::cmp, (Hash)Type::uhash,
duke@435	198	shared_type_arena, 128 );
duke@435	199	current->set_type_dict(_shared_type_dict);
duke@435	200
duke@435	201	// Make shared pre-built types.
duke@435	202	CONTROL = make(Control); // Control only
duke@435	203	TOP = make(Top); // No values in set
duke@435	204	MEMORY = make(Memory); // Abstract store only
duke@435	205	ABIO = make(Abio); // State-of-machine only
duke@435	206	RETURN_ADDRESS=make(Return_Address);
duke@435	207	FLOAT = make(FloatBot); // All floats
duke@435	208	DOUBLE = make(DoubleBot); // All doubles
duke@435	209	BOTTOM = make(Bottom); // Everything
duke@435	210	HALF = make(Half); // Placeholder half of doublewide type
duke@435	211
duke@435	212	TypeF::ZERO = TypeF::make(0.0); // Float 0 (positive zero)
duke@435	213	TypeF::ONE = TypeF::make(1.0); // Float 1
duke@435	214
duke@435	215	TypeD::ZERO = TypeD::make(0.0); // Double 0 (positive zero)
duke@435	216	TypeD::ONE = TypeD::make(1.0); // Double 1
duke@435	217
duke@435	218	TypeInt::MINUS_1 = TypeInt::make(-1); // -1
duke@435	219	TypeInt::ZERO = TypeInt::make( 0); // 0
duke@435	220	TypeInt::ONE = TypeInt::make( 1); // 1
duke@435	221	TypeInt::BOOL = TypeInt::make(0,1, WidenMin); // 0 or 1, FALSE or TRUE.
duke@435	222	TypeInt::CC = TypeInt::make(-1, 1, WidenMin); // -1, 0 or 1, condition codes
duke@435	223	TypeInt::CC_LT = TypeInt::make(-1,-1, WidenMin); // == TypeInt::MINUS_1
duke@435	224	TypeInt::CC_GT = TypeInt::make( 1, 1, WidenMin); // == TypeInt::ONE
duke@435	225	TypeInt::CC_EQ = TypeInt::make( 0, 0, WidenMin); // == TypeInt::ZERO
duke@435	226	TypeInt::CC_LE = TypeInt::make(-1, 0, WidenMin);
duke@435	227	TypeInt::CC_GE = TypeInt::make( 0, 1, WidenMin); // == TypeInt::BOOL
duke@435	228	TypeInt::BYTE = TypeInt::make(-128,127, WidenMin); // Bytes
duke@435	229	TypeInt::CHAR = TypeInt::make(0,65535, WidenMin); // Java chars
duke@435	230	TypeInt::SHORT = TypeInt::make(-32768,32767, WidenMin); // Java shorts
duke@435	231	TypeInt::POS = TypeInt::make(0,max_jint, WidenMin); // Non-neg values
duke@435	232	TypeInt::POS1 = TypeInt::make(1,max_jint, WidenMin); // Positive values
duke@435	233	TypeInt::INT = TypeInt::make(min_jint,max_jint, WidenMax); // 32-bit integers
duke@435	234	TypeInt::SYMINT = TypeInt::make(-max_jint,max_jint,WidenMin); // symmetric range
duke@435	235	// CmpL is overloaded both as the bytecode computation returning
duke@435	236	// a trinary (-1,0,+1) integer result AND as an efficient long
duke@435	237	// compare returning optimizer ideal-type flags.
duke@435	238	assert( TypeInt::CC_LT == TypeInt::MINUS_1, "types must match for CmpL to work" );
duke@435	239	assert( TypeInt::CC_GT == TypeInt::ONE, "types must match for CmpL to work" );
duke@435	240	assert( TypeInt::CC_EQ == TypeInt::ZERO, "types must match for CmpL to work" );
duke@435	241	assert( TypeInt::CC_GE == TypeInt::BOOL, "types must match for CmpL to work" );
duke@435	242
duke@435	243	TypeLong::MINUS_1 = TypeLong::make(-1); // -1
duke@435	244	TypeLong::ZERO = TypeLong::make( 0); // 0
duke@435	245	TypeLong::ONE = TypeLong::make( 1); // 1
duke@435	246	TypeLong::POS = TypeLong::make(0,max_jlong, WidenMin); // Non-neg values
duke@435	247	TypeLong::LONG = TypeLong::make(min_jlong,max_jlong,WidenMax); // 64-bit integers
duke@435	248	TypeLong::INT = TypeLong::make((jlong)min_jint,(jlong)max_jint,WidenMin);
duke@435	249	TypeLong::UINT = TypeLong::make(0,(jlong)max_juint,WidenMin);
duke@435	250
duke@435	251	const Type **fboth =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*));
duke@435	252	fboth[0] = Type::CONTROL;
duke@435	253	fboth[1] = Type::CONTROL;
duke@435	254	TypeTuple::IFBOTH = TypeTuple::make( 2, fboth );
duke@435	255
duke@435	256	const Type **ffalse =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*));
duke@435	257	ffalse[0] = Type::CONTROL;
duke@435	258	ffalse[1] = Type::TOP;
duke@435	259	TypeTuple::IFFALSE = TypeTuple::make( 2, ffalse );
duke@435	260
duke@435	261	const Type **fneither =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*));
duke@435	262	fneither[0] = Type::TOP;
duke@435	263	fneither[1] = Type::TOP;
duke@435	264	TypeTuple::IFNEITHER = TypeTuple::make( 2, fneither );
duke@435	265
duke@435	266	const Type **ftrue =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*));
duke@435	267	ftrue[0] = Type::TOP;
duke@435	268	ftrue[1] = Type::CONTROL;
duke@435	269	TypeTuple::IFTRUE = TypeTuple::make( 2, ftrue );
duke@435	270
duke@435	271	const Type **floop =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*));
duke@435	272	floop[0] = Type::CONTROL;
duke@435	273	floop[1] = TypeInt::INT;
duke@435	274	TypeTuple::LOOPBODY = TypeTuple::make( 2, floop );
duke@435	275
duke@435	276	TypePtr::NULL_PTR= TypePtr::make( AnyPtr, TypePtr::Null, 0 );
duke@435	277	TypePtr::NOTNULL = TypePtr::make( AnyPtr, TypePtr::NotNull, OffsetBot );
duke@435	278	TypePtr::BOTTOM = TypePtr::make( AnyPtr, TypePtr::BotPTR, OffsetBot );
duke@435	279
duke@435	280	TypeRawPtr::BOTTOM = TypeRawPtr::make( TypePtr::BotPTR );
duke@435	281	TypeRawPtr::NOTNULL= TypeRawPtr::make( TypePtr::NotNull );
duke@435	282
duke@435	283	const Type **fmembar = TypeTuple::fields(0);
duke@435	284	TypeTuple::MEMBAR = TypeTuple::make(TypeFunc::Parms+0, fmembar);
duke@435	285
duke@435	286	const Type **fsc = (const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*));
duke@435	287	fsc[0] = TypeInt::CC;
duke@435	288	fsc[1] = Type::MEMORY;
duke@435	289	TypeTuple::STORECONDITIONAL = TypeTuple::make(2, fsc);
duke@435	290
duke@435	291	TypeInstPtr::NOTNULL = TypeInstPtr::make(TypePtr::NotNull, current->env()->Object_klass());
duke@435	292	TypeInstPtr::BOTTOM = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass());
duke@435	293	TypeInstPtr::MIRROR = TypeInstPtr::make(TypePtr::NotNull, current->env()->Class_klass());
duke@435	294	TypeInstPtr::MARK = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(),
duke@435	295	false, 0, oopDesc::mark_offset_in_bytes());
duke@435	296	TypeInstPtr::KLASS = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(),
duke@435	297	false, 0, oopDesc::klass_offset_in_bytes());
duke@435	298	TypeOopPtr::BOTTOM = TypeOopPtr::make(TypePtr::BotPTR, OffsetBot);
duke@435	299
coleenp@548	300	TypeNarrowOop::NULL_PTR = TypeNarrowOop::make( TypePtr::NULL_PTR );
coleenp@548	301	TypeNarrowOop::BOTTOM = TypeNarrowOop::make( TypeInstPtr::BOTTOM );
coleenp@548	302
coleenp@548	303	mreg2type[Op_Node] = Type::BOTTOM;
coleenp@548	304	mreg2type[Op_Set ] = 0;
coleenp@548	305	mreg2type[Op_RegN] = TypeNarrowOop::BOTTOM;
coleenp@548	306	mreg2type[Op_RegI] = TypeInt::INT;
coleenp@548	307	mreg2type[Op_RegP] = TypePtr::BOTTOM;
coleenp@548	308	mreg2type[Op_RegF] = Type::FLOAT;
coleenp@548	309	mreg2type[Op_RegD] = Type::DOUBLE;
coleenp@548	310	mreg2type[Op_RegL] = TypeLong::LONG;
coleenp@548	311	mreg2type[Op_RegFlags] = TypeInt::CC;
coleenp@548	312
duke@435	313	TypeAryPtr::RANGE = TypeAryPtr::make( TypePtr::BotPTR, TypeAry::make(Type::BOTTOM,TypeInt::POS), current->env()->Object_klass(), false, arrayOopDesc::length_offset_in_bytes());
kvn@598	314
kvn@598	315	TypeAryPtr::NARROWOOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeNarrowOop::BOTTOM, TypeInt::POS), NULL /*ciArrayKlass::make(o)*/, false, Type::OffsetBot);
kvn@598	316
kvn@598	317	#ifdef _LP64
kvn@598	318	if (UseCompressedOops) {
kvn@598	319	TypeAryPtr::OOPS = TypeAryPtr::NARROWOOPS;
kvn@598	320	} else
kvn@598	321	#endif
kvn@598	322	{
kvn@598	323	// There is no shared klass for Object[]. See note in TypeAryPtr::klass().
kvn@598	324	TypeAryPtr::OOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInstPtr::BOTTOM,TypeInt::POS), NULL /*ciArrayKlass::make(o)*/, false, Type::OffsetBot);
kvn@598	325	}
duke@435	326	TypeAryPtr::BYTES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::BYTE ,TypeInt::POS), ciTypeArrayKlass::make(T_BYTE), true, Type::OffsetBot);
duke@435	327	TypeAryPtr::SHORTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::SHORT ,TypeInt::POS), ciTypeArrayKlass::make(T_SHORT), true, Type::OffsetBot);
duke@435	328	TypeAryPtr::CHARS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::CHAR ,TypeInt::POS), ciTypeArrayKlass::make(T_CHAR), true, Type::OffsetBot);
duke@435	329	TypeAryPtr::INTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::INT ,TypeInt::POS), ciTypeArrayKlass::make(T_INT), true, Type::OffsetBot);
duke@435	330	TypeAryPtr::LONGS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeLong::LONG ,TypeInt::POS), ciTypeArrayKlass::make(T_LONG), true, Type::OffsetBot);
duke@435	331	TypeAryPtr::FLOATS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::FLOAT ,TypeInt::POS), ciTypeArrayKlass::make(T_FLOAT), true, Type::OffsetBot);
duke@435	332	TypeAryPtr::DOUBLES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::DOUBLE ,TypeInt::POS), ciTypeArrayKlass::make(T_DOUBLE), true, Type::OffsetBot);
duke@435	333
kvn@598	334	// Nobody should ask _array_body_type[T_NARROWOOP]. Use NULL as assert.
kvn@598	335	TypeAryPtr::_array_body_type[T_NARROWOOP] = NULL;
duke@435	336	TypeAryPtr::_array_body_type[T_OBJECT] = TypeAryPtr::OOPS;
kvn@598	337	TypeAryPtr::_array_body_type[T_ARRAY] = TypeAryPtr::OOPS; // arrays are stored in oop arrays
duke@435	338	TypeAryPtr::_array_body_type[T_BYTE] = TypeAryPtr::BYTES;
duke@435	339	TypeAryPtr::_array_body_type[T_BOOLEAN] = TypeAryPtr::BYTES; // boolean[] is a byte array
duke@435	340	TypeAryPtr::_array_body_type[T_SHORT] = TypeAryPtr::SHORTS;
duke@435	341	TypeAryPtr::_array_body_type[T_CHAR] = TypeAryPtr::CHARS;
duke@435	342	TypeAryPtr::_array_body_type[T_INT] = TypeAryPtr::INTS;
duke@435	343	TypeAryPtr::_array_body_type[T_LONG] = TypeAryPtr::LONGS;
duke@435	344	TypeAryPtr::_array_body_type[T_FLOAT] = TypeAryPtr::FLOATS;
duke@435	345	TypeAryPtr::_array_body_type[T_DOUBLE] = TypeAryPtr::DOUBLES;
duke@435	346
duke@435	347	TypeKlassPtr::OBJECT = TypeKlassPtr::make( TypePtr::NotNull, current->env()->Object_klass(), 0 );
duke@435	348	TypeKlassPtr::OBJECT_OR_NULL = TypeKlassPtr::make( TypePtr::BotPTR, current->env()->Object_klass(), 0 );
duke@435	349
duke@435	350	const Type **fi2c = TypeTuple::fields(2);
duke@435	351	fi2c[TypeFunc::Parms+0] = TypeInstPtr::BOTTOM; // methodOop
duke@435	352	fi2c[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // argument pointer
duke@435	353	TypeTuple::START_I2C = TypeTuple::make(TypeFunc::Parms+2, fi2c);
duke@435	354
duke@435	355	const Type **intpair = TypeTuple::fields(2);
duke@435	356	intpair[0] = TypeInt::INT;
duke@435	357	intpair[1] = TypeInt::INT;
duke@435	358	TypeTuple::INT_PAIR = TypeTuple::make(2, intpair);
duke@435	359
duke@435	360	const Type **longpair = TypeTuple::fields(2);
duke@435	361	longpair[0] = TypeLong::LONG;
duke@435	362	longpair[1] = TypeLong::LONG;
duke@435	363	TypeTuple::LONG_PAIR = TypeTuple::make(2, longpair);
duke@435	364
coleenp@548	365	_const_basic_type[T_NARROWOOP] = TypeNarrowOop::BOTTOM;
duke@435	366	_const_basic_type[T_BOOLEAN] = TypeInt::BOOL;
duke@435	367	_const_basic_type[T_CHAR] = TypeInt::CHAR;
duke@435	368	_const_basic_type[T_BYTE] = TypeInt::BYTE;
duke@435	369	_const_basic_type[T_SHORT] = TypeInt::SHORT;
duke@435	370	_const_basic_type[T_INT] = TypeInt::INT;
duke@435	371	_const_basic_type[T_LONG] = TypeLong::LONG;
duke@435	372	_const_basic_type[T_FLOAT] = Type::FLOAT;
duke@435	373	_const_basic_type[T_DOUBLE] = Type::DOUBLE;
duke@435	374	_const_basic_type[T_OBJECT] = TypeInstPtr::BOTTOM;
duke@435	375	_const_basic_type[T_ARRAY] = TypeInstPtr::BOTTOM; // there is no separate bottom for arrays
duke@435	376	_const_basic_type[T_VOID] = TypePtr::NULL_PTR; // reflection represents void this way
duke@435	377	_const_basic_type[T_ADDRESS] = TypeRawPtr::BOTTOM; // both interpreter return addresses & random raw ptrs
duke@435	378	_const_basic_type[T_CONFLICT]= Type::BOTTOM; // why not?
duke@435	379
coleenp@548	380	_zero_type[T_NARROWOOP] = TypeNarrowOop::NULL_PTR;
duke@435	381	_zero_type[T_BOOLEAN] = TypeInt::ZERO; // false == 0
duke@435	382	_zero_type[T_CHAR] = TypeInt::ZERO; // '\0' == 0
duke@435	383	_zero_type[T_BYTE] = TypeInt::ZERO; // 0x00 == 0
duke@435	384	_zero_type[T_SHORT] = TypeInt::ZERO; // 0x0000 == 0
duke@435	385	_zero_type[T_INT] = TypeInt::ZERO;
duke@435	386	_zero_type[T_LONG] = TypeLong::ZERO;
duke@435	387	_zero_type[T_FLOAT] = TypeF::ZERO;
duke@435	388	_zero_type[T_DOUBLE] = TypeD::ZERO;
duke@435	389	_zero_type[T_OBJECT] = TypePtr::NULL_PTR;
duke@435	390	_zero_type[T_ARRAY] = TypePtr::NULL_PTR; // null array is null oop
duke@435	391	_zero_type[T_ADDRESS] = TypePtr::NULL_PTR; // raw pointers use the same null
duke@435	392	_zero_type[T_VOID] = Type::TOP; // the only void value is no value at all
duke@435	393
duke@435	394	// get_zero_type() should not happen for T_CONFLICT
duke@435	395	_zero_type[T_CONFLICT]= NULL;
duke@435	396
duke@435	397	// Restore working type arena.
duke@435	398	current->set_type_arena(save);
duke@435	399	current->set_type_dict(NULL);
duke@435	400	}
duke@435	401
duke@435	402	//------------------------------Initialize-------------------------------------
duke@435	403	void Type::Initialize(Compile* current) {
duke@435	404	assert(current->type_arena() != NULL, "must have created type arena");
duke@435	405
duke@435	406	if (_shared_type_dict == NULL) {
duke@435	407	Initialize_shared(current);
duke@435	408	}
duke@435	409
duke@435	410	Arena* type_arena = current->type_arena();
duke@435	411
duke@435	412	// Create the hash-cons'ing dictionary with top-level storage allocation
duke@435	413	Dict *tdic = new (type_arena) Dict( (CmpKey)Type::cmp,(Hash)Type::uhash, type_arena, 128 );
duke@435	414	current->set_type_dict(tdic);
duke@435	415
duke@435	416	// Transfer the shared types.
duke@435	417	DictI i(_shared_type_dict);
duke@435	418	for( ; i.test(); ++i ) {
duke@435	419	Type* t = (Type*)i._value;
duke@435	420	tdic->Insert(t,t); // New Type, insert into Type table
duke@435	421	}
coleenp@548	422
coleenp@548	423	#ifdef ASSERT
coleenp@548	424	verify_lastype();
coleenp@548	425	#endif
duke@435	426	}
duke@435	427
duke@435	428	//------------------------------hashcons---------------------------------------
duke@435	429	// Do the hash-cons trick. If the Type already exists in the type table,
duke@435	430	// delete the current Type and return the existing Type. Otherwise stick the
duke@435	431	// current Type in the Type table.
duke@435	432	const Type *Type::hashcons(void) {
duke@435	433	debug_only(base()); // Check the assertion in Type::base().
duke@435	434	// Look up the Type in the Type dictionary
duke@435	435	Dict *tdic = type_dict();
duke@435	436	Type* old = (Type*)(tdic->Insert(this, this, false));
duke@435	437	if( old ) { // Pre-existing Type?
duke@435	438	if( old != this ) // Yes, this guy is not the pre-existing?
duke@435	439	delete this; // Yes, Nuke this guy
duke@435	440	assert( old->_dual, "" );
duke@435	441	return old; // Return pre-existing
duke@435	442	}
duke@435	443
duke@435	444	// Every type has a dual (to make my lattice symmetric).
duke@435	445	// Since we just discovered a new Type, compute its dual right now.
duke@435	446	assert( !_dual, "" ); // No dual yet
duke@435	447	_dual = xdual(); // Compute the dual
duke@435	448	if( cmp(this,_dual)==0 ) { // Handle self-symmetric
duke@435	449	_dual = this;
duke@435	450	return this;
duke@435	451	}
duke@435	452	assert( !_dual->_dual, "" ); // No reverse dual yet
duke@435	453	assert( !(*tdic)[_dual], "" ); // Dual not in type system either
duke@435	454	// New Type, insert into Type table
duke@435	455	tdic->Insert((void*)_dual,(void*)_dual);
duke@435	456	((Type*)_dual)->_dual = this; // Finish up being symmetric
duke@435	457	#ifdef ASSERT
duke@435	458	Type *dual_dual = (Type*)_dual->xdual();
duke@435	459	assert( eq(dual_dual), "xdual(xdual()) should be identity" );
duke@435	460	delete dual_dual;
duke@435	461	#endif
duke@435	462	return this; // Return new Type
duke@435	463	}
duke@435	464
duke@435	465	//------------------------------eq---------------------------------------------
duke@435	466	// Structural equality check for Type representations
duke@435	467	bool Type::eq( const Type * ) const {
duke@435	468	return true; // Nothing else can go wrong
duke@435	469	}
duke@435	470
duke@435	471	//------------------------------hash-------------------------------------------
duke@435	472	// Type-specific hashing function.
duke@435	473	int Type::hash(void) const {
duke@435	474	return _base;
duke@435	475	}
duke@435	476
duke@435	477	//------------------------------is_finite--------------------------------------
duke@435	478	// Has a finite value
duke@435	479	bool Type::is_finite() const {
duke@435	480	return false;
duke@435	481	}
duke@435	482
duke@435	483	//------------------------------is_nan-----------------------------------------
duke@435	484	// Is not a number (NaN)
duke@435	485	bool Type::is_nan() const {
duke@435	486	return false;
duke@435	487	}
duke@435	488
duke@435	489	//------------------------------meet-------------------------------------------
duke@435	490	// Compute the MEET of two types. NOT virtual. It enforces that meet is
duke@435	491	// commutative and the lattice is symmetric.
duke@435	492	const Type *Type::meet( const Type *t ) const {
coleenp@548	493	if (isa_narrowoop() && t->isa_narrowoop()) {
kvn@656	494	const Type* result = make_ptr()->meet(t->make_ptr());
kvn@656	495	return result->make_narrowoop();
coleenp@548	496	}
coleenp@548	497
duke@435	498	const Type *mt = xmeet(t);
coleenp@548	499	if (isa_narrowoop() || t->isa_narrowoop()) return mt;
duke@435	500	#ifdef ASSERT
duke@435	501	assert( mt == t->xmeet(this), "meet not commutative" );
duke@435	502	const Type* dual_join = mt->_dual;
duke@435	503	const Type *t2t = dual_join->xmeet(t->_dual);
duke@435	504	const Type *t2this = dual_join->xmeet( _dual);
duke@435	505
duke@435	506	// Interface meet Oop is Not Symmetric:
duke@435	507	// Interface:AnyNull meet Oop:AnyNull == Interface:AnyNull
duke@435	508	// Interface:NotNull meet Oop:NotNull == java/lang/Object:NotNull
duke@435	509	const TypeInstPtr* this_inst = this->isa_instptr();
duke@435	510	const TypeInstPtr* t_inst = t->isa_instptr();
duke@435	511	bool interface_vs_oop = false;
duke@435	512	if( this_inst && this_inst->is_loaded() && t_inst && t_inst->is_loaded() ) {
duke@435	513	bool this_interface = this_inst->klass()->is_interface();
duke@435	514	bool t_interface = t_inst->klass()->is_interface();
duke@435	515	interface_vs_oop = this_interface ^ t_interface;
duke@435	516	}
kvn@658	517
kvn@658	518	if( !interface_vs_oop && (t2t != t->_dual || t2this != _dual) ) {
duke@435	519	tty->print_cr("=== Meet Not Symmetric ===");
duke@435	520	tty->print("t = "); t->dump(); tty->cr();
duke@435	521	tty->print("this= "); dump(); tty->cr();
duke@435	522	tty->print("mt=(t meet this)= "); mt->dump(); tty->cr();
duke@435	523
duke@435	524	tty->print("t_dual= "); t->_dual->dump(); tty->cr();
duke@435	525	tty->print("this_dual= "); _dual->dump(); tty->cr();
duke@435	526	tty->print("mt_dual= "); mt->_dual->dump(); tty->cr();
duke@435	527
duke@435	528	tty->print("mt_dual meet t_dual= "); t2t ->dump(); tty->cr();
duke@435	529	tty->print("mt_dual meet this_dual= "); t2this ->dump(); tty->cr();
duke@435	530
duke@435	531	fatal("meet not symmetric" );
duke@435	532	}
duke@435	533	#endif
duke@435	534	return mt;
duke@435	535	}
duke@435	536
duke@435	537	//------------------------------xmeet------------------------------------------
duke@435	538	// Compute the MEET of two types. It returns a new Type object.
duke@435	539	const Type *Type::xmeet( const Type *t ) const {
duke@435	540	// Perform a fast test for common case; meeting the same types together.
duke@435	541	if( this == t ) return this; // Meeting same type-rep?
duke@435	542
duke@435	543	// Meeting TOP with anything?
duke@435	544	if( _base == Top ) return t;
duke@435	545
duke@435	546	// Meeting BOTTOM with anything?
duke@435	547	if( _base == Bottom ) return BOTTOM;
duke@435	548
duke@435	549	// Current "this->_base" is one of: Bad, Multi, Control, Top,
duke@435	550	// Abio, Abstore, Floatxxx, Doublexxx, Bottom, lastype.
duke@435	551	switch (t->base()) { // Switch on original type
duke@435	552
duke@435	553	// Cut in half the number of cases I must handle. Only need cases for when
duke@435	554	// the given enum "t->type" is less than or equal to the local enum "type".
duke@435	555	case FloatCon:
duke@435	556	case DoubleCon:
duke@435	557	case Int:
duke@435	558	case Long:
duke@435	559	return t->xmeet(this);
duke@435	560
duke@435	561	case OopPtr:
duke@435	562	return t->xmeet(this);
duke@435	563
duke@435	564	case InstPtr:
duke@435	565	return t->xmeet(this);
duke@435	566
duke@435	567	case KlassPtr:
duke@435	568	return t->xmeet(this);
duke@435	569
duke@435	570	case AryPtr:
duke@435	571	return t->xmeet(this);
duke@435	572
coleenp@548	573	case NarrowOop:
coleenp@548	574	return t->xmeet(this);
coleenp@548	575
duke@435	576	case Bad: // Type check
duke@435	577	default: // Bogus type not in lattice
duke@435	578	typerr(t);
duke@435	579	return Type::BOTTOM;
duke@435	580
duke@435	581	case Bottom: // Ye Olde Default
duke@435	582	return t;
duke@435	583
duke@435	584	case FloatTop:
duke@435	585	if( _base == FloatTop ) return this;
duke@435	586	case FloatBot: // Float
duke@435	587	if( _base == FloatBot || _base == FloatTop ) return FLOAT;
duke@435	588	if( _base == DoubleTop || _base == DoubleBot ) return Type::BOTTOM;
duke@435	589	typerr(t);
duke@435	590	return Type::BOTTOM;
duke@435	591
duke@435	592	case DoubleTop:
duke@435	593	if( _base == DoubleTop ) return this;
duke@435	594	case DoubleBot: // Double
duke@435	595	if( _base == DoubleBot || _base == DoubleTop ) return DOUBLE;
duke@435	596	if( _base == FloatTop || _base == FloatBot ) return Type::BOTTOM;
duke@435	597	typerr(t);
duke@435	598	return Type::BOTTOM;
duke@435	599
duke@435	600	// These next few cases must match exactly or it is a compile-time error.
duke@435	601	case Control: // Control of code
duke@435	602	case Abio: // State of world outside of program
duke@435	603	case Memory:
duke@435	604	if( _base == t->_base ) return this;
duke@435	605	typerr(t);
duke@435	606	return Type::BOTTOM;
duke@435	607
duke@435	608	case Top: // Top of the lattice
duke@435	609	return this;
duke@435	610	}
duke@435	611
duke@435	612	// The type is unchanged
duke@435	613	return this;
duke@435	614	}
duke@435	615
duke@435	616	//-----------------------------filter------------------------------------------
duke@435	617	const Type *Type::filter( const Type *kills ) const {
duke@435	618	const Type* ft = join(kills);
duke@435	619	if (ft->empty())
duke@435	620	return Type::TOP; // Canonical empty value
duke@435	621	return ft;
duke@435	622	}
duke@435	623
duke@435	624	//------------------------------xdual------------------------------------------
duke@435	625	// Compute dual right now.
duke@435	626	const Type::TYPES Type::dual_type[Type::lastype] = {
duke@435	627	Bad, // Bad
duke@435	628	Control, // Control
duke@435	629	Bottom, // Top
duke@435	630	Bad, // Int - handled in v-call
duke@435	631	Bad, // Long - handled in v-call
duke@435	632	Half, // Half
coleenp@548	633	Bad, // NarrowOop - handled in v-call
duke@435	634
duke@435	635	Bad, // Tuple - handled in v-call
duke@435	636	Bad, // Array - handled in v-call
duke@435	637
duke@435	638	Bad, // AnyPtr - handled in v-call
duke@435	639	Bad, // RawPtr - handled in v-call
duke@435	640	Bad, // OopPtr - handled in v-call
duke@435	641	Bad, // InstPtr - handled in v-call
duke@435	642	Bad, // AryPtr - handled in v-call
duke@435	643	Bad, // KlassPtr - handled in v-call
duke@435	644
duke@435	645	Bad, // Function - handled in v-call
duke@435	646	Abio, // Abio
duke@435	647	Return_Address,// Return_Address
duke@435	648	Memory, // Memory
duke@435	649	FloatBot, // FloatTop
duke@435	650	FloatCon, // FloatCon
duke@435	651	FloatTop, // FloatBot
duke@435	652	DoubleBot, // DoubleTop
duke@435	653	DoubleCon, // DoubleCon
duke@435	654	DoubleTop, // DoubleBot
duke@435	655	Top // Bottom
duke@435	656	};
duke@435	657
duke@435	658	const Type *Type::xdual() const {
duke@435	659	// Note: the base() accessor asserts the sanity of _base.
duke@435	660	assert(dual_type[base()] != Bad, "implement with v-call");
duke@435	661	return new Type(dual_type[_base]);
duke@435	662	}
duke@435	663
duke@435	664	//------------------------------has_memory-------------------------------------
duke@435	665	bool Type::has_memory() const {
duke@435	666	Type::TYPES tx = base();
duke@435	667	if (tx == Memory) return true;
duke@435	668	if (tx == Tuple) {
duke@435	669	const TypeTuple *t = is_tuple();
duke@435	670	for (uint i=0; i < t->cnt(); i++) {
duke@435	671	tx = t->field_at(i)->base();
duke@435	672	if (tx == Memory) return true;
duke@435	673	}
duke@435	674	}
duke@435	675	return false;
duke@435	676	}
duke@435	677
duke@435	678	#ifndef PRODUCT
duke@435	679	//------------------------------dump2------------------------------------------
duke@435	680	void Type::dump2( Dict &d, uint depth, outputStream *st ) const {
duke@435	681	st->print(msg[_base]);
duke@435	682	}
duke@435	683
duke@435	684	//------------------------------dump-------------------------------------------
duke@435	685	void Type::dump_on(outputStream *st) const {
duke@435	686	ResourceMark rm;
duke@435	687	Dict d(cmpkey,hashkey); // Stop recursive type dumping
duke@435	688	dump2(d,1, st);
kvn@598	689	if (is_ptr_to_narrowoop()) {
coleenp@548	690	st->print(" [narrow]");
coleenp@548	691	}
duke@435	692	}
duke@435	693
duke@435	694	//------------------------------data-------------------------------------------
duke@435	695	const char * const Type::msg[Type::lastype] = {
coleenp@548	696	"bad","control","top","int:","long:","half", "narrowoop:",
duke@435	697	"tuple:", "aryptr",
duke@435	698	"anyptr:", "rawptr:", "java:", "inst:", "ary:", "klass:",
duke@435	699	"func", "abIO", "return_address", "memory",
duke@435	700	"float_top", "ftcon:", "float",
duke@435	701	"double_top", "dblcon:", "double",
duke@435	702	"bottom"
duke@435	703	};
duke@435	704	#endif
duke@435	705
duke@435	706	//------------------------------singleton--------------------------------------
duke@435	707	// TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
duke@435	708	// constants (Ldi nodes). Singletons are integer, float or double constants.
duke@435	709	bool Type::singleton(void) const {
duke@435	710	return _base == Top || _base == Half;
duke@435	711	}
duke@435	712
duke@435	713	//------------------------------empty------------------------------------------
duke@435	714	// TRUE if Type is a type with no values, FALSE otherwise.
duke@435	715	bool Type::empty(void) const {
duke@435	716	switch (_base) {
duke@435	717	case DoubleTop:
duke@435	718	case FloatTop:
duke@435	719	case Top:
duke@435	720	return true;
duke@435	721
duke@435	722	case Half:
duke@435	723	case Abio:
duke@435	724	case Return_Address:
duke@435	725	case Memory:
duke@435	726	case Bottom:
duke@435	727	case FloatBot:
duke@435	728	case DoubleBot:
duke@435	729	return false; // never a singleton, therefore never empty
duke@435	730	}
duke@435	731
duke@435	732	ShouldNotReachHere();
duke@435	733	return false;
duke@435	734	}
duke@435	735
duke@435	736	//------------------------------dump_stats-------------------------------------
duke@435	737	// Dump collected statistics to stderr
duke@435	738	#ifndef PRODUCT
duke@435	739	void Type::dump_stats() {
duke@435	740	tty->print("Types made: %d\n", type_dict()->Size());
duke@435	741	}
duke@435	742	#endif
duke@435	743
duke@435	744	//------------------------------typerr-----------------------------------------
duke@435	745	void Type::typerr( const Type *t ) const {
duke@435	746	#ifndef PRODUCT
duke@435	747	tty->print("\nError mixing types: ");
duke@435	748	dump();
duke@435	749	tty->print(" and ");
duke@435	750	t->dump();
duke@435	751	tty->print("\n");
duke@435	752	#endif
duke@435	753	ShouldNotReachHere();
duke@435	754	}
duke@435	755
duke@435	756	//------------------------------isa_oop_ptr------------------------------------
duke@435	757	// Return true if type is an oop pointer type. False for raw pointers.
duke@435	758	static char isa_oop_ptr_tbl[Type::lastype] = {
coleenp@548	759	0,0,0,0,0,0,0/*narrowoop*/,0/*tuple*/, 0/*ary*/,
duke@435	760	0/*anyptr*/,0/*rawptr*/,1/*OopPtr*/,1/*InstPtr*/,1/*AryPtr*/,1/*KlassPtr*/,
duke@435	761	0/*func*/,0,0/*return_address*/,0,
duke@435	762	/*floats*/0,0,0, /*doubles*/0,0,0,
duke@435	763	0
duke@435	764	};
duke@435	765	bool Type::isa_oop_ptr() const {
duke@435	766	return isa_oop_ptr_tbl[_base] != 0;
duke@435	767	}
duke@435	768
duke@435	769	//------------------------------dump_stats-------------------------------------
duke@435	770	// // Check that arrays match type enum
duke@435	771	#ifndef PRODUCT
duke@435	772	void Type::verify_lastype() {
duke@435	773	// Check that arrays match enumeration
duke@435	774	assert( Type::dual_type [Type::lastype - 1] == Type::Top, "did not update array");
duke@435	775	assert( strcmp(Type::msg [Type::lastype - 1],"bottom") == 0, "did not update array");
duke@435	776	// assert( PhiNode::tbl [Type::lastype - 1] == NULL, "did not update array");
duke@435	777	assert( Matcher::base2reg[Type::lastype - 1] == 0, "did not update array");
duke@435	778	assert( isa_oop_ptr_tbl [Type::lastype - 1] == (char)0, "did not update array");
duke@435	779	}
duke@435	780	#endif
duke@435	781
duke@435	782	//=============================================================================
duke@435	783	// Convenience common pre-built types.
duke@435	784	const TypeF *TypeF::ZERO; // Floating point zero
duke@435	785	const TypeF *TypeF::ONE; // Floating point one
duke@435	786
duke@435	787	//------------------------------make-------------------------------------------
duke@435	788	// Create a float constant
duke@435	789	const TypeF *TypeF::make(float f) {
duke@435	790	return (TypeF*)(new TypeF(f))->hashcons();
duke@435	791	}
duke@435	792
duke@435	793	//------------------------------meet-------------------------------------------
duke@435	794	// Compute the MEET of two types. It returns a new Type object.
duke@435	795	const Type *TypeF::xmeet( const Type *t ) const {
duke@435	796	// Perform a fast test for common case; meeting the same types together.
duke@435	797	if( this == t ) return this; // Meeting same type-rep?
duke@435	798
duke@435	799	// Current "this->_base" is FloatCon
duke@435	800	switch (t->base()) { // Switch on original type
duke@435	801	case AnyPtr: // Mixing with oops happens when javac
duke@435	802	case RawPtr: // reuses local variables
duke@435	803	case OopPtr:
duke@435	804	case InstPtr:
duke@435	805	case KlassPtr:
duke@435	806	case AryPtr:
duke@435	807	case Int:
duke@435	808	case Long:
duke@435	809	case DoubleTop:
duke@435	810	case DoubleCon:
duke@435	811	case DoubleBot:
duke@435	812	case Bottom: // Ye Olde Default
duke@435	813	return Type::BOTTOM;
duke@435	814
duke@435	815	case FloatBot:
duke@435	816	return t;
duke@435	817
duke@435	818	default: // All else is a mistake
duke@435	819	typerr(t);
duke@435	820
duke@435	821	case FloatCon: // Float-constant vs Float-constant?
duke@435	822	if( jint_cast(_f) != jint_cast(t->getf()) ) // unequal constants?
duke@435	823	// must compare bitwise as positive zero, negative zero and NaN have
duke@435	824	// all the same representation in C++
duke@435	825	return FLOAT; // Return generic float
duke@435	826	// Equal constants
duke@435	827	case Top:
duke@435	828	case FloatTop:
duke@435	829	break; // Return the float constant
duke@435	830	}
duke@435	831	return this; // Return the float constant
duke@435	832	}
duke@435	833
duke@435	834	//------------------------------xdual------------------------------------------
duke@435	835	// Dual: symmetric
duke@435	836	const Type *TypeF::xdual() const {
duke@435	837	return this;
duke@435	838	}
duke@435	839
duke@435	840	//------------------------------eq---------------------------------------------
duke@435	841	// Structural equality check for Type representations
duke@435	842	bool TypeF::eq( const Type *t ) const {
duke@435	843	if( g_isnan(_f) ||
duke@435	844	g_isnan(t->getf()) ) {
duke@435	845	// One or both are NANs. If both are NANs return true, else false.
duke@435	846	return (g_isnan(_f) && g_isnan(t->getf()));
duke@435	847	}
duke@435	848	if (_f == t->getf()) {
duke@435	849	// (NaN is impossible at this point, since it is not equal even to itself)
duke@435	850	if (_f == 0.0) {
duke@435	851	// difference between positive and negative zero
duke@435	852	if (jint_cast(_f) != jint_cast(t->getf())) return false;
duke@435	853	}
duke@435	854	return true;
duke@435	855	}
duke@435	856	return false;
duke@435	857	}
duke@435	858
duke@435	859	//------------------------------hash-------------------------------------------
duke@435	860	// Type-specific hashing function.
duke@435	861	int TypeF::hash(void) const {
duke@435	862	return *(int*)(&_f);
duke@435	863	}
duke@435	864
duke@435	865	//------------------------------is_finite--------------------------------------
duke@435	866	// Has a finite value
duke@435	867	bool TypeF::is_finite() const {
duke@435	868	return g_isfinite(getf()) != 0;
duke@435	869	}
duke@435	870
duke@435	871	//------------------------------is_nan-----------------------------------------
duke@435	872	// Is not a number (NaN)
duke@435	873	bool TypeF::is_nan() const {
duke@435	874	return g_isnan(getf()) != 0;
duke@435	875	}
duke@435	876
duke@435	877	//------------------------------dump2------------------------------------------
duke@435	878	// Dump float constant Type
duke@435	879	#ifndef PRODUCT
duke@435	880	void TypeF::dump2( Dict &d, uint depth, outputStream *st ) const {
duke@435	881	Type::dump2(d,depth, st);
duke@435	882	st->print("%f", _f);
duke@435	883	}
duke@435	884	#endif
duke@435	885
duke@435	886	//------------------------------singleton--------------------------------------
duke@435	887	// TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
duke@435	888	// constants (Ldi nodes). Singletons are integer, float or double constants
duke@435	889	// or a single symbol.
duke@435	890	bool TypeF::singleton(void) const {
duke@435	891	return true; // Always a singleton
duke@435	892	}
duke@435	893
duke@435	894	bool TypeF::empty(void) const {
duke@435	895	return false; // always exactly a singleton
duke@435	896	}
duke@435	897
duke@435	898	//=============================================================================
duke@435	899	// Convenience common pre-built types.
duke@435	900	const TypeD *TypeD::ZERO; // Floating point zero
duke@435	901	const TypeD *TypeD::ONE; // Floating point one
duke@435	902
duke@435	903	//------------------------------make-------------------------------------------
duke@435	904	const TypeD *TypeD::make(double d) {
duke@435	905	return (TypeD*)(new TypeD(d))->hashcons();
duke@435	906	}
duke@435	907
duke@435	908	//------------------------------meet-------------------------------------------
duke@435	909	// Compute the MEET of two types. It returns a new Type object.
duke@435	910	const Type *TypeD::xmeet( const Type *t ) const {
duke@435	911	// Perform a fast test for common case; meeting the same types together.
duke@435	912	if( this == t ) return this; // Meeting same type-rep?
duke@435	913
duke@435	914	// Current "this->_base" is DoubleCon
duke@435	915	switch (t->base()) { // Switch on original type
duke@435	916	case AnyPtr: // Mixing with oops happens when javac
duke@435	917	case RawPtr: // reuses local variables
duke@435	918	case OopPtr:
duke@435	919	case InstPtr:
duke@435	920	case KlassPtr:
duke@435	921	case AryPtr:
never@618	922	case NarrowOop:
duke@435	923	case Int:
duke@435	924	case Long:
duke@435	925	case FloatTop:
duke@435	926	case FloatCon:
duke@435	927	case FloatBot:
duke@435	928	case Bottom: // Ye Olde Default
duke@435	929	return Type::BOTTOM;
duke@435	930
duke@435	931	case DoubleBot:
duke@435	932	return t;
duke@435	933
duke@435	934	default: // All else is a mistake
duke@435	935	typerr(t);
duke@435	936
duke@435	937	case DoubleCon: // Double-constant vs Double-constant?
duke@435	938	if( jlong_cast(_d) != jlong_cast(t->getd()) ) // unequal constants? (see comment in TypeF::xmeet)
duke@435	939	return DOUBLE; // Return generic double
duke@435	940	case Top:
duke@435	941	case DoubleTop:
duke@435	942	break;
duke@435	943	}
duke@435	944	return this; // Return the double constant
duke@435	945	}
duke@435	946
duke@435	947	//------------------------------xdual------------------------------------------
duke@435	948	// Dual: symmetric
duke@435	949	const Type *TypeD::xdual() const {
duke@435	950	return this;
duke@435	951	}
duke@435	952
duke@435	953	//------------------------------eq---------------------------------------------
duke@435	954	// Structural equality check for Type representations
duke@435	955	bool TypeD::eq( const Type *t ) const {
duke@435	956	if( g_isnan(_d) ||
duke@435	957	g_isnan(t->getd()) ) {
duke@435	958	// One or both are NANs. If both are NANs return true, else false.
duke@435	959	return (g_isnan(_d) && g_isnan(t->getd()));
duke@435	960	}
duke@435	961	if (_d == t->getd()) {
duke@435	962	// (NaN is impossible at this point, since it is not equal even to itself)
duke@435	963	if (_d == 0.0) {
duke@435	964	// difference between positive and negative zero
duke@435	965	if (jlong_cast(_d) != jlong_cast(t->getd())) return false;
duke@435	966	}
duke@435	967	return true;
duke@435	968	}
duke@435	969	return false;
duke@435	970	}
duke@435	971
duke@435	972	//------------------------------hash-------------------------------------------
duke@435	973	// Type-specific hashing function.
duke@435	974	int TypeD::hash(void) const {
duke@435	975	return *(int*)(&_d);
duke@435	976	}
duke@435	977
duke@435	978	//------------------------------is_finite--------------------------------------
duke@435	979	// Has a finite value
duke@435	980	bool TypeD::is_finite() const {
duke@435	981	return g_isfinite(getd()) != 0;
duke@435	982	}
duke@435	983
duke@435	984	//------------------------------is_nan-----------------------------------------
duke@435	985	// Is not a number (NaN)
duke@435	986	bool TypeD::is_nan() const {
duke@435	987	return g_isnan(getd()) != 0;
duke@435	988	}
duke@435	989
duke@435	990	//------------------------------dump2------------------------------------------
duke@435	991	// Dump double constant Type
duke@435	992	#ifndef PRODUCT
duke@435	993	void TypeD::dump2( Dict &d, uint depth, outputStream *st ) const {
duke@435	994	Type::dump2(d,depth,st);
duke@435	995	st->print("%f", _d);
duke@435	996	}
duke@435	997	#endif
duke@435	998
duke@435	999	//------------------------------singleton--------------------------------------
duke@435	1000	// TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
duke@435	1001	// constants (Ldi nodes). Singletons are integer, float or double constants
duke@435	1002	// or a single symbol.
duke@435	1003	bool TypeD::singleton(void) const {
duke@435	1004	return true; // Always a singleton
duke@435	1005	}
duke@435	1006
duke@435	1007	bool TypeD::empty(void) const {
duke@435	1008	return false; // always exactly a singleton
duke@435	1009	}
duke@435	1010
duke@435	1011	//=============================================================================
duke@435	1012	// Convience common pre-built types.
duke@435	1013	const TypeInt *TypeInt::MINUS_1;// -1
duke@435	1014	const TypeInt *TypeInt::ZERO; // 0
duke@435	1015	const TypeInt *TypeInt::ONE; // 1
duke@435	1016	const TypeInt *TypeInt::BOOL; // 0 or 1, FALSE or TRUE.
duke@435	1017	const TypeInt *TypeInt::CC; // -1,0 or 1, condition codes
duke@435	1018	const TypeInt *TypeInt::CC_LT; // [-1] == MINUS_1
duke@435	1019	const TypeInt *TypeInt::CC_GT; // [1] == ONE
duke@435	1020	const TypeInt *TypeInt::CC_EQ; // [0] == ZERO
duke@435	1021	const TypeInt *TypeInt::CC_LE; // [-1,0]
duke@435	1022	const TypeInt *TypeInt::CC_GE; // [0,1] == BOOL (!)
duke@435	1023	const TypeInt *TypeInt::BYTE; // Bytes, -128 to 127
duke@435	1024	const TypeInt *TypeInt::CHAR; // Java chars, 0-65535
duke@435	1025	const TypeInt *TypeInt::SHORT; // Java shorts, -32768-32767
duke@435	1026	const TypeInt *TypeInt::POS; // Positive 32-bit integers or zero
duke@435	1027	const TypeInt *TypeInt::POS1; // Positive 32-bit integers
duke@435	1028	const TypeInt *TypeInt::INT; // 32-bit integers
duke@435	1029	const TypeInt *TypeInt::SYMINT; // symmetric range [-max_jint..max_jint]
duke@435	1030
duke@435	1031	//------------------------------TypeInt----------------------------------------
duke@435	1032	TypeInt::TypeInt( jint lo, jint hi, int w ) : Type(Int), _lo(lo), _hi(hi), _widen(w) {
duke@435	1033	}
duke@435	1034
duke@435	1035	//------------------------------make-------------------------------------------
duke@435	1036	const TypeInt *TypeInt::make( jint lo ) {
duke@435	1037	return (TypeInt*)(new TypeInt(lo,lo,WidenMin))->hashcons();
duke@435	1038	}
duke@435	1039
duke@435	1040	#define SMALLINT ((juint)3) // a value too insignificant to consider widening
duke@435	1041
duke@435	1042	const TypeInt *TypeInt::make( jint lo, jint hi, int w ) {
duke@435	1043	// Certain normalizations keep us sane when comparing types.
duke@435	1044	// The 'SMALLINT' covers constants and also CC and its relatives.
duke@435	1045	assert(CC == NULL || (juint)(CC->_hi - CC->_lo) <= SMALLINT, "CC is truly small");
duke@435	1046	if (lo <= hi) {
duke@435	1047	if ((juint)(hi - lo) <= SMALLINT) w = Type::WidenMin;
duke@435	1048	if ((juint)(hi - lo) >= max_juint) w = Type::WidenMax; // plain int
duke@435	1049	}
duke@435	1050	return (TypeInt*)(new TypeInt(lo,hi,w))->hashcons();
duke@435	1051	}
duke@435	1052
duke@435	1053	//------------------------------meet-------------------------------------------
duke@435	1054	// Compute the MEET of two types. It returns a new Type representation object
duke@435	1055	// with reference count equal to the number of Types pointing at it.
duke@435	1056	// Caller should wrap a Types around it.
duke@435	1057	const Type *TypeInt::xmeet( const Type *t ) const {
duke@435	1058	// Perform a fast test for common case; meeting the same types together.
duke@435	1059	if( this == t ) return this; // Meeting same type?
duke@435	1060
duke@435	1061	// Currently "this->_base" is a TypeInt
duke@435	1062	switch (t->base()) { // Switch on original type
duke@435	1063	case AnyPtr: // Mixing with oops happens when javac
duke@435	1064	case RawPtr: // reuses local variables
duke@435	1065	case OopPtr:
duke@435	1066	case InstPtr:
duke@435	1067	case KlassPtr:
duke@435	1068	case AryPtr:
never@618	1069	case NarrowOop:
duke@435	1070	case Long:
duke@435	1071	case FloatTop:
duke@435	1072	case FloatCon:
duke@435	1073	case FloatBot:
duke@435	1074	case DoubleTop:
duke@435	1075	case DoubleCon:
duke@435	1076	case DoubleBot:
duke@435	1077	case Bottom: // Ye Olde Default
duke@435	1078	return Type::BOTTOM;
duke@435	1079	default: // All else is a mistake
duke@435	1080	typerr(t);
duke@435	1081	case Top: // No change
duke@435	1082	return this;
duke@435	1083	case Int: // Int vs Int?
duke@435	1084	break;
duke@435	1085	}
duke@435	1086
duke@435	1087	// Expand covered set
duke@435	1088	const TypeInt *r = t->is_int();
duke@435	1089	// (Avoid TypeInt::make, to avoid the argument normalizations it enforces.)
duke@435	1090	return (new TypeInt( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) ))->hashcons();
duke@435	1091	}
duke@435	1092
duke@435	1093	//------------------------------xdual------------------------------------------
duke@435	1094	// Dual: reverse hi & lo; flip widen
duke@435	1095	const Type *TypeInt::xdual() const {
duke@435	1096	return new TypeInt(_hi,_lo,WidenMax-_widen);
duke@435	1097	}
duke@435	1098
duke@435	1099	//------------------------------widen------------------------------------------
duke@435	1100	// Only happens for optimistic top-down optimizations.
duke@435	1101	const Type *TypeInt::widen( const Type *old ) const {
duke@435	1102	// Coming from TOP or such; no widening
duke@435	1103	if( old->base() != Int ) return this;
duke@435	1104	const TypeInt *ot = old->is_int();
duke@435	1105
duke@435	1106	// If new guy is equal to old guy, no widening
duke@435	1107	if( _lo == ot->_lo && _hi == ot->_hi )
duke@435	1108	return old;
duke@435	1109
duke@435	1110	// If new guy contains old, then we widened
duke@435	1111	if( _lo <= ot->_lo && _hi >= ot->_hi ) {
duke@435	1112	// New contains old
duke@435	1113	// If new guy is already wider than old, no widening
duke@435	1114	if( _widen > ot->_widen ) return this;
duke@435	1115	// If old guy was a constant, do not bother
duke@435	1116	if (ot->_lo == ot->_hi) return this;
duke@435	1117	// Now widen new guy.
duke@435	1118	// Check for widening too far
duke@435	1119	if (_widen == WidenMax) {
duke@435	1120	if (min_jint < _lo && _hi < max_jint) {
duke@435	1121	// If neither endpoint is extremal yet, push out the endpoint
duke@435	1122	// which is closer to its respective limit.
duke@435	1123	if (_lo >= 0 || // easy common case
duke@435	1124	(juint)(_lo - min_jint) >= (juint)(max_jint - _hi)) {
duke@435	1125	// Try to widen to an unsigned range type of 31 bits:
duke@435	1126	return make(_lo, max_jint, WidenMax);
duke@435	1127	} else {
duke@435	1128	return make(min_jint, _hi, WidenMax);
duke@435	1129	}
duke@435	1130	}
duke@435	1131	return TypeInt::INT;
duke@435	1132	}
duke@435	1133	// Returned widened new guy
duke@435	1134	return make(_lo,_hi,_widen+1);
duke@435	1135	}
duke@435	1136
duke@435	1137	// If old guy contains new, then we probably widened too far & dropped to
duke@435	1138	// bottom. Return the wider fellow.
duke@435	1139	if ( ot->_lo <= _lo && ot->_hi >= _hi )
duke@435	1140	return old;
duke@435	1141
duke@435	1142	//fatal("Integer value range is not subset");
duke@435	1143	//return this;
duke@435	1144	return TypeInt::INT;
duke@435	1145	}
duke@435	1146
duke@435	1147	//------------------------------narrow---------------------------------------
duke@435	1148	// Only happens for pessimistic optimizations.
duke@435	1149	const Type *TypeInt::narrow( const Type *old ) const {
duke@435	1150	if (_lo >= _hi) return this; // already narrow enough
duke@435	1151	if (old == NULL) return this;
duke@435	1152	const TypeInt* ot = old->isa_int();
duke@435	1153	if (ot == NULL) return this;
duke@435	1154	jint olo = ot->_lo;
duke@435	1155	jint ohi = ot->_hi;
duke@435	1156
duke@435	1157	// If new guy is equal to old guy, no narrowing
duke@435	1158	if (_lo == olo && _hi == ohi) return old;
duke@435	1159
duke@435	1160	// If old guy was maximum range, allow the narrowing
duke@435	1161	if (olo == min_jint && ohi == max_jint) return this;
duke@435	1162
duke@435	1163	if (_lo < olo || _hi > ohi)
duke@435	1164	return this; // doesn't narrow; pretty wierd
duke@435	1165
duke@435	1166	// The new type narrows the old type, so look for a "death march".
duke@435	1167	// See comments on PhaseTransform::saturate.
duke@435	1168	juint nrange = _hi - _lo;
duke@435	1169	juint orange = ohi - olo;
duke@435	1170	if (nrange < max_juint - 1 && nrange > (orange >> 1) + (SMALLINT*2)) {
duke@435	1171	// Use the new type only if the range shrinks a lot.
duke@435	1172	// We do not want the optimizer computing 2^31 point by point.
duke@435	1173	return old;
duke@435	1174	}
duke@435	1175
duke@435	1176	return this;
duke@435	1177	}
duke@435	1178
duke@435	1179	//-----------------------------filter------------------------------------------
duke@435	1180	const Type *TypeInt::filter( const Type *kills ) const {
duke@435	1181	const TypeInt* ft = join(kills)->isa_int();
duke@435	1182	if (ft == NULL || ft->_lo > ft->_hi)
duke@435	1183	return Type::TOP; // Canonical empty value
duke@435	1184	if (ft->_widen < this->_widen) {
duke@435	1185	// Do not allow the value of kill->_widen to affect the outcome.
duke@435	1186	// The widen bits must be allowed to run freely through the graph.
duke@435	1187	ft = TypeInt::make(ft->_lo, ft->_hi, this->_widen);
duke@435	1188	}
duke@435	1189	return ft;
duke@435	1190	}
duke@435	1191
duke@435	1192	//------------------------------eq---------------------------------------------
duke@435	1193	// Structural equality check for Type representations
duke@435	1194	bool TypeInt::eq( const Type *t ) const {
duke@435	1195	const TypeInt *r = t->is_int(); // Handy access
duke@435	1196	return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen;
duke@435	1197	}
duke@435	1198
duke@435	1199	//------------------------------hash-------------------------------------------
duke@435	1200	// Type-specific hashing function.
duke@435	1201	int TypeInt::hash(void) const {
duke@435	1202	return _lo+_hi+_widen+(int)Type::Int;
duke@435	1203	}
duke@435	1204
duke@435	1205	//------------------------------is_finite--------------------------------------
duke@435	1206	// Has a finite value
duke@435	1207	bool TypeInt::is_finite() const {
duke@435	1208	return true;
duke@435	1209	}
duke@435	1210
duke@435	1211	//------------------------------dump2------------------------------------------
duke@435	1212	// Dump TypeInt
duke@435	1213	#ifndef PRODUCT
duke@435	1214	static const char* intname(char* buf, jint n) {
duke@435	1215	if (n == min_jint)
duke@435	1216	return "min";
duke@435	1217	else if (n < min_jint + 10000)
duke@435	1218	sprintf(buf, "min+" INT32_FORMAT, n - min_jint);
duke@435	1219	else if (n == max_jint)
duke@435	1220	return "max";
duke@435	1221	else if (n > max_jint - 10000)
duke@435	1222	sprintf(buf, "max-" INT32_FORMAT, max_jint - n);
duke@435	1223	else
duke@435	1224	sprintf(buf, INT32_FORMAT, n);
duke@435	1225	return buf;
duke@435	1226	}
duke@435	1227
duke@435	1228	void TypeInt::dump2( Dict &d, uint depth, outputStream *st ) const {
duke@435	1229	char buf[40], buf2[40];
duke@435	1230	if (_lo == min_jint && _hi == max_jint)
duke@435	1231	st->print("int");
duke@435	1232	else if (is_con())
duke@435	1233	st->print("int:%s", intname(buf, get_con()));
duke@435	1234	else if (_lo == BOOL->_lo && _hi == BOOL->_hi)
duke@435	1235	st->print("bool");
duke@435	1236	else if (_lo == BYTE->_lo && _hi == BYTE->_hi)
duke@435	1237	st->print("byte");
duke@435	1238	else if (_lo == CHAR->_lo && _hi == CHAR->_hi)
duke@435	1239	st->print("char");
duke@435	1240	else if (_lo == SHORT->_lo && _hi == SHORT->_hi)
duke@435	1241	st->print("short");
duke@435	1242	else if (_hi == max_jint)
duke@435	1243	st->print("int:>=%s", intname(buf, _lo));
duke@435	1244	else if (_lo == min_jint)
duke@435	1245	st->print("int:<=%s", intname(buf, _hi));
duke@435	1246	else
duke@435	1247	st->print("int:%s..%s", intname(buf, _lo), intname(buf2, _hi));
duke@435	1248
duke@435	1249	if (_widen != 0 && this != TypeInt::INT)
duke@435	1250	st->print(":%.*s", _widen, "wwww");
duke@435	1251	}
duke@435	1252	#endif
duke@435	1253
duke@435	1254	//------------------------------singleton--------------------------------------
duke@435	1255	// TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
duke@435	1256	// constants.
duke@435	1257	bool TypeInt::singleton(void) const {
duke@435	1258	return _lo >= _hi;
duke@435	1259	}
duke@435	1260
duke@435	1261	bool TypeInt::empty(void) const {
duke@435	1262	return _lo > _hi;
duke@435	1263	}
duke@435	1264
duke@435	1265	//=============================================================================
duke@435	1266	// Convenience common pre-built types.
duke@435	1267	const TypeLong *TypeLong::MINUS_1;// -1
duke@435	1268	const TypeLong *TypeLong::ZERO; // 0
duke@435	1269	const TypeLong *TypeLong::ONE; // 1
duke@435	1270	const TypeLong *TypeLong::POS; // >=0
duke@435	1271	const TypeLong *TypeLong::LONG; // 64-bit integers
duke@435	1272	const TypeLong *TypeLong::INT; // 32-bit subrange
duke@435	1273	const TypeLong *TypeLong::UINT; // 32-bit unsigned subrange
duke@435	1274
duke@435	1275	//------------------------------TypeLong---------------------------------------
duke@435	1276	TypeLong::TypeLong( jlong lo, jlong hi, int w ) : Type(Long), _lo(lo), _hi(hi), _widen(w) {
duke@435	1277	}
duke@435	1278
duke@435	1279	//------------------------------make-------------------------------------------
duke@435	1280	const TypeLong *TypeLong::make( jlong lo ) {
duke@435	1281	return (TypeLong*)(new TypeLong(lo,lo,WidenMin))->hashcons();
duke@435	1282	}
duke@435	1283
duke@435	1284	const TypeLong *TypeLong::make( jlong lo, jlong hi, int w ) {
duke@435	1285	// Certain normalizations keep us sane when comparing types.
duke@435	1286	// The '1' covers constants.
duke@435	1287	if (lo <= hi) {
duke@435	1288	if ((julong)(hi - lo) <= SMALLINT) w = Type::WidenMin;
duke@435	1289	if ((julong)(hi - lo) >= max_julong) w = Type::WidenMax; // plain long
duke@435	1290	}
duke@435	1291	return (TypeLong*)(new TypeLong(lo,hi,w))->hashcons();
duke@435	1292	}
duke@435	1293
duke@435	1294
duke@435	1295	//------------------------------meet-------------------------------------------
duke@435	1296	// Compute the MEET of two types. It returns a new Type representation object
duke@435	1297	// with reference count equal to the number of Types pointing at it.
duke@435	1298	// Caller should wrap a Types around it.
duke@435	1299	const Type *TypeLong::xmeet( const Type *t ) const {
duke@435	1300	// Perform a fast test for common case; meeting the same types together.
duke@435	1301	if( this == t ) return this; // Meeting same type?
duke@435	1302
duke@435	1303	// Currently "this->_base" is a TypeLong
duke@435	1304	switch (t->base()) { // Switch on original type
duke@435	1305	case AnyPtr: // Mixing with oops happens when javac
duke@435	1306	case RawPtr: // reuses local variables
duke@435	1307	case OopPtr:
duke@435	1308	case InstPtr:
duke@435	1309	case KlassPtr:
duke@435	1310	case AryPtr:
never@618	1311	case NarrowOop:
duke@435	1312	case Int:
duke@435	1313	case FloatTop:
duke@435	1314	case FloatCon:
duke@435	1315	case FloatBot:
duke@435	1316	case DoubleTop:
duke@435	1317	case DoubleCon:
duke@435	1318	case DoubleBot:
duke@435	1319	case Bottom: // Ye Olde Default
duke@435	1320	return Type::BOTTOM;
duke@435	1321	default: // All else is a mistake
duke@435	1322	typerr(t);
duke@435	1323	case Top: // No change
duke@435	1324	return this;
duke@435	1325	case Long: // Long vs Long?
duke@435	1326	break;
duke@435	1327	}
duke@435	1328
duke@435	1329	// Expand covered set
duke@435	1330	const TypeLong *r = t->is_long(); // Turn into a TypeLong
duke@435	1331	// (Avoid TypeLong::make, to avoid the argument normalizations it enforces.)
duke@435	1332	return (new TypeLong( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) ))->hashcons();
duke@435	1333	}
duke@435	1334
duke@435	1335	//------------------------------xdual------------------------------------------
duke@435	1336	// Dual: reverse hi & lo; flip widen
duke@435	1337	const Type *TypeLong::xdual() const {
duke@435	1338	return new TypeLong(_hi,_lo,WidenMax-_widen);
duke@435	1339	}
duke@435	1340
duke@435	1341	//------------------------------widen------------------------------------------
duke@435	1342	// Only happens for optimistic top-down optimizations.
duke@435	1343	const Type *TypeLong::widen( const Type *old ) const {
duke@435	1344	// Coming from TOP or such; no widening
duke@435	1345	if( old->base() != Long ) return this;
duke@435	1346	const TypeLong *ot = old->is_long();
duke@435	1347
duke@435	1348	// If new guy is equal to old guy, no widening
duke@435	1349	if( _lo == ot->_lo && _hi == ot->_hi )
duke@435	1350	return old;
duke@435	1351
duke@435	1352	// If new guy contains old, then we widened
duke@435	1353	if( _lo <= ot->_lo && _hi >= ot->_hi ) {
duke@435	1354	// New contains old
duke@435	1355	// If new guy is already wider than old, no widening
duke@435	1356	if( _widen > ot->_widen ) return this;
duke@435	1357	// If old guy was a constant, do not bother
duke@435	1358	if (ot->_lo == ot->_hi) return this;
duke@435	1359	// Now widen new guy.
duke@435	1360	// Check for widening too far
duke@435	1361	if (_widen == WidenMax) {
duke@435	1362	if (min_jlong < _lo && _hi < max_jlong) {
duke@435	1363	// If neither endpoint is extremal yet, push out the endpoint
duke@435	1364	// which is closer to its respective limit.
duke@435	1365	if (_lo >= 0 || // easy common case
duke@435	1366	(julong)(_lo - min_jlong) >= (julong)(max_jlong - _hi)) {
duke@435	1367	// Try to widen to an unsigned range type of 32/63 bits:
duke@435	1368	if (_hi < max_juint)
duke@435	1369	return make(_lo, max_juint, WidenMax);
duke@435	1370	else
duke@435	1371	return make(_lo, max_jlong, WidenMax);
duke@435	1372	} else {
duke@435	1373	return make(min_jlong, _hi, WidenMax);
duke@435	1374	}
duke@435	1375	}
duke@435	1376	return TypeLong::LONG;
duke@435	1377	}
duke@435	1378	// Returned widened new guy
duke@435	1379	return make(_lo,_hi,_widen+1);
duke@435	1380	}
duke@435	1381
duke@435	1382	// If old guy contains new, then we probably widened too far & dropped to
duke@435	1383	// bottom. Return the wider fellow.
duke@435	1384	if ( ot->_lo <= _lo && ot->_hi >= _hi )
duke@435	1385	return old;
duke@435	1386
duke@435	1387	// fatal("Long value range is not subset");
duke@435	1388	// return this;
duke@435	1389	return TypeLong::LONG;
duke@435	1390	}
duke@435	1391
duke@435	1392	//------------------------------narrow----------------------------------------
duke@435	1393	// Only happens for pessimistic optimizations.
duke@435	1394	const Type *TypeLong::narrow( const Type *old ) const {
duke@435	1395	if (_lo >= _hi) return this; // already narrow enough
duke@435	1396	if (old == NULL) return this;
duke@435	1397	const TypeLong* ot = old->isa_long();
duke@435	1398	if (ot == NULL) return this;
duke@435	1399	jlong olo = ot->_lo;
duke@435	1400	jlong ohi = ot->_hi;
duke@435	1401
duke@435	1402	// If new guy is equal to old guy, no narrowing
duke@435	1403	if (_lo == olo && _hi == ohi) return old;
duke@435	1404
duke@435	1405	// If old guy was maximum range, allow the narrowing
duke@435	1406	if (olo == min_jlong && ohi == max_jlong) return this;
duke@435	1407
duke@435	1408	if (_lo < olo || _hi > ohi)
duke@435	1409	return this; // doesn't narrow; pretty wierd
duke@435	1410
duke@435	1411	// The new type narrows the old type, so look for a "death march".
duke@435	1412	// See comments on PhaseTransform::saturate.
duke@435	1413	julong nrange = _hi - _lo;
duke@435	1414	julong orange = ohi - olo;
duke@435	1415	if (nrange < max_julong - 1 && nrange > (orange >> 1) + (SMALLINT*2)) {
duke@435	1416	// Use the new type only if the range shrinks a lot.
duke@435	1417	// We do not want the optimizer computing 2^31 point by point.
duke@435	1418	return old;
duke@435	1419	}
duke@435	1420
duke@435	1421	return this;
duke@435	1422	}
duke@435	1423
duke@435	1424	//-----------------------------filter------------------------------------------
duke@435	1425	const Type *TypeLong::filter( const Type *kills ) const {
duke@435	1426	const TypeLong* ft = join(kills)->isa_long();
duke@435	1427	if (ft == NULL || ft->_lo > ft->_hi)
duke@435	1428	return Type::TOP; // Canonical empty value
duke@435	1429	if (ft->_widen < this->_widen) {
duke@435	1430	// Do not allow the value of kill->_widen to affect the outcome.
duke@435	1431	// The widen bits must be allowed to run freely through the graph.
duke@435	1432	ft = TypeLong::make(ft->_lo, ft->_hi, this->_widen);
duke@435	1433	}
duke@435	1434	return ft;
duke@435	1435	}
duke@435	1436
duke@435	1437	//------------------------------eq---------------------------------------------
duke@435	1438	// Structural equality check for Type representations
duke@435	1439	bool TypeLong::eq( const Type *t ) const {
duke@435	1440	const TypeLong *r = t->is_long(); // Handy access
duke@435	1441	return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen;
duke@435	1442	}
duke@435	1443
duke@435	1444	//------------------------------hash-------------------------------------------
duke@435	1445	// Type-specific hashing function.
duke@435	1446	int TypeLong::hash(void) const {
duke@435	1447	return (int)(_lo+_hi+_widen+(int)Type::Long);
duke@435	1448	}
duke@435	1449
duke@435	1450	//------------------------------is_finite--------------------------------------
duke@435	1451	// Has a finite value
duke@435	1452	bool TypeLong::is_finite() const {
duke@435	1453	return true;
duke@435	1454	}
duke@435	1455
duke@435	1456	//------------------------------dump2------------------------------------------
duke@435	1457	// Dump TypeLong
duke@435	1458	#ifndef PRODUCT
duke@435	1459	static const char* longnamenear(jlong x, const char* xname, char* buf, jlong n) {
duke@435	1460	if (n > x) {
duke@435	1461	if (n >= x + 10000) return NULL;
duke@435	1462	sprintf(buf, "%s+" INT64_FORMAT, xname, n - x);
duke@435	1463	} else if (n < x) {
duke@435	1464	if (n <= x - 10000) return NULL;
duke@435	1465	sprintf(buf, "%s-" INT64_FORMAT, xname, x - n);
duke@435	1466	} else {
duke@435	1467	return xname;
duke@435	1468	}
duke@435	1469	return buf;
duke@435	1470	}
duke@435	1471
duke@435	1472	static const char* longname(char* buf, jlong n) {
duke@435	1473	const char* str;
duke@435	1474	if (n == min_jlong)
duke@435	1475	return "min";
duke@435	1476	else if (n < min_jlong + 10000)
duke@435	1477	sprintf(buf, "min+" INT64_FORMAT, n - min_jlong);
duke@435	1478	else if (n == max_jlong)
duke@435	1479	return "max";
duke@435	1480	else if (n > max_jlong - 10000)
duke@435	1481	sprintf(buf, "max-" INT64_FORMAT, max_jlong - n);
duke@435	1482	else if ((str = longnamenear(max_juint, "maxuint", buf, n)) != NULL)
duke@435	1483	return str;
duke@435	1484	else if ((str = longnamenear(max_jint, "maxint", buf, n)) != NULL)
duke@435	1485	return str;
duke@435	1486	else if ((str = longnamenear(min_jint, "minint", buf, n)) != NULL)
duke@435	1487	return str;
duke@435	1488	else
duke@435	1489	sprintf(buf, INT64_FORMAT, n);
duke@435	1490	return buf;
duke@435	1491	}
duke@435	1492
duke@435	1493	void TypeLong::dump2( Dict &d, uint depth, outputStream *st ) const {
duke@435	1494	char buf[80], buf2[80];
duke@435	1495	if (_lo == min_jlong && _hi == max_jlong)
duke@435	1496	st->print("long");
duke@435	1497	else if (is_con())
duke@435	1498	st->print("long:%s", longname(buf, get_con()));
duke@435	1499	else if (_hi == max_jlong)
duke@435	1500	st->print("long:>=%s", longname(buf, _lo));
duke@435	1501	else if (_lo == min_jlong)
duke@435	1502	st->print("long:<=%s", longname(buf, _hi));
duke@435	1503	else
duke@435	1504	st->print("long:%s..%s", longname(buf, _lo), longname(buf2, _hi));
duke@435	1505
duke@435	1506	if (_widen != 0 && this != TypeLong::LONG)
duke@435	1507	st->print(":%.*s", _widen, "wwww");
duke@435	1508	}
duke@435	1509	#endif
duke@435	1510
duke@435	1511	//------------------------------singleton--------------------------------------
duke@435	1512	// TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
duke@435	1513	// constants
duke@435	1514	bool TypeLong::singleton(void) const {
duke@435	1515	return _lo >= _hi;
duke@435	1516	}
duke@435	1517
duke@435	1518	bool TypeLong::empty(void) const {
duke@435	1519	return _lo > _hi;
duke@435	1520	}
duke@435	1521
duke@435	1522	//=============================================================================
duke@435	1523	// Convenience common pre-built types.
duke@435	1524	const TypeTuple *TypeTuple::IFBOTH; // Return both arms of IF as reachable
duke@435	1525	const TypeTuple *TypeTuple::IFFALSE;
duke@435	1526	const TypeTuple *TypeTuple::IFTRUE;
duke@435	1527	const TypeTuple *TypeTuple::IFNEITHER;
duke@435	1528	const TypeTuple *TypeTuple::LOOPBODY;
duke@435	1529	const TypeTuple *TypeTuple::MEMBAR;
duke@435	1530	const TypeTuple *TypeTuple::STORECONDITIONAL;
duke@435	1531	const TypeTuple *TypeTuple::START_I2C;
duke@435	1532	const TypeTuple *TypeTuple::INT_PAIR;
duke@435	1533	const TypeTuple *TypeTuple::LONG_PAIR;
duke@435	1534
duke@435	1535
duke@435	1536	//------------------------------make-------------------------------------------
duke@435	1537	// Make a TypeTuple from the range of a method signature
duke@435	1538	const TypeTuple *TypeTuple::make_range(ciSignature* sig) {
duke@435	1539	ciType* return_type = sig->return_type();
duke@435	1540	uint total_fields = TypeFunc::Parms + return_type->size();
duke@435	1541	const Type **field_array = fields(total_fields);
duke@435	1542	switch (return_type->basic_type()) {
duke@435	1543	case T_LONG:
duke@435	1544	field_array[TypeFunc::Parms] = TypeLong::LONG;
duke@435	1545	field_array[TypeFunc::Parms+1] = Type::HALF;
duke@435	1546	break;
duke@435	1547	case T_DOUBLE:
duke@435	1548	field_array[TypeFunc::Parms] = Type::DOUBLE;
duke@435	1549	field_array[TypeFunc::Parms+1] = Type::HALF;
duke@435	1550	break;
duke@435	1551	case T_OBJECT:
duke@435	1552	case T_ARRAY:
duke@435	1553	case T_BOOLEAN:
duke@435	1554	case T_CHAR:
duke@435	1555	case T_FLOAT:
duke@435	1556	case T_BYTE:
duke@435	1557	case T_SHORT:
duke@435	1558	case T_INT:
duke@435	1559	field_array[TypeFunc::Parms] = get_const_type(return_type);
duke@435	1560	break;
duke@435	1561	case T_VOID:
duke@435	1562	break;
duke@435	1563	default:
duke@435	1564	ShouldNotReachHere();
duke@435	1565	}
duke@435	1566	return (TypeTuple*)(new TypeTuple(total_fields,field_array))->hashcons();
duke@435	1567	}
duke@435	1568
duke@435	1569	// Make a TypeTuple from the domain of a method signature
duke@435	1570	const TypeTuple *TypeTuple::make_domain(ciInstanceKlass* recv, ciSignature* sig) {
duke@435	1571	uint total_fields = TypeFunc::Parms + sig->size();
duke@435	1572
duke@435	1573	uint pos = TypeFunc::Parms;
duke@435	1574	const Type **field_array;
duke@435	1575	if (recv != NULL) {
duke@435	1576	total_fields++;
duke@435	1577	field_array = fields(total_fields);
duke@435	1578	// Use get_const_type here because it respects UseUniqueSubclasses:
duke@435	1579	field_array[pos++] = get_const_type(recv)->join(TypePtr::NOTNULL);
duke@435	1580	} else {
duke@435	1581	field_array = fields(total_fields);
duke@435	1582	}
duke@435	1583
duke@435	1584	int i = 0;
duke@435	1585	while (pos < total_fields) {
duke@435	1586	ciType* type = sig->type_at(i);
duke@435	1587
duke@435	1588	switch (type->basic_type()) {
duke@435	1589	case T_LONG:
duke@435	1590	field_array[pos++] = TypeLong::LONG;
duke@435	1591	field_array[pos++] = Type::HALF;
duke@435	1592	break;
duke@435	1593	case T_DOUBLE:
duke@435	1594	field_array[pos++] = Type::DOUBLE;
duke@435	1595	field_array[pos++] = Type::HALF;
duke@435	1596	break;
duke@435	1597	case T_OBJECT:
duke@435	1598	case T_ARRAY:
duke@435	1599	case T_BOOLEAN:
duke@435	1600	case T_CHAR:
duke@435	1601	case T_FLOAT:
duke@435	1602	case T_BYTE:
duke@435	1603	case T_SHORT:
duke@435	1604	case T_INT:
duke@435	1605	field_array[pos++] = get_const_type(type);
duke@435	1606	break;
duke@435	1607	default:
duke@435	1608	ShouldNotReachHere();
duke@435	1609	}
duke@435	1610	i++;
duke@435	1611	}
duke@435	1612	return (TypeTuple*)(new TypeTuple(total_fields,field_array))->hashcons();
duke@435	1613	}
duke@435	1614
duke@435	1615	const TypeTuple *TypeTuple::make( uint cnt, const Type **fields ) {
duke@435	1616	return (TypeTuple*)(new TypeTuple(cnt,fields))->hashcons();
duke@435	1617	}
duke@435	1618
duke@435	1619	//------------------------------fields-----------------------------------------
duke@435	1620	// Subroutine call type with space allocated for argument types
duke@435	1621	const Type **TypeTuple::fields( uint arg_cnt ) {
duke@435	1622	const Type **flds = (const Type **)(Compile::current()->type_arena()->Amalloc_4((TypeFunc::Parms+arg_cnt)*sizeof(Type*) ));
duke@435	1623	flds[TypeFunc::Control ] = Type::CONTROL;
duke@435	1624	flds[TypeFunc::I_O ] = Type::ABIO;
duke@435	1625	flds[TypeFunc::Memory ] = Type::MEMORY;
duke@435	1626	flds[TypeFunc::FramePtr ] = TypeRawPtr::BOTTOM;
duke@435	1627	flds[TypeFunc::ReturnAdr] = Type::RETURN_ADDRESS;
duke@435	1628
duke@435	1629	return flds;
duke@435	1630	}
duke@435	1631
duke@435	1632	//------------------------------meet-------------------------------------------
duke@435	1633	// Compute the MEET of two types. It returns a new Type object.
duke@435	1634	const Type *TypeTuple::xmeet( const Type *t ) const {
duke@435	1635	// Perform a fast test for common case; meeting the same types together.
duke@435	1636	if( this == t ) return this; // Meeting same type-rep?
duke@435	1637
duke@435	1638	// Current "this->_base" is Tuple
duke@435	1639	switch (t->base()) { // switch on original type
duke@435	1640
duke@435	1641	case Bottom: // Ye Olde Default
duke@435	1642	return t;
duke@435	1643
duke@435	1644	default: // All else is a mistake
duke@435	1645	typerr(t);
duke@435	1646
duke@435	1647	case Tuple: { // Meeting 2 signatures?
duke@435	1648	const TypeTuple *x = t->is_tuple();
duke@435	1649	assert( _cnt == x->_cnt, "" );
duke@435	1650	const Type **fields = (const Type **)(Compile::current()->type_arena()->Amalloc_4( _cnt*sizeof(Type*) ));
duke@435	1651	for( uint i=0; i<_cnt; i++ )
duke@435	1652	fields[i] = field_at(i)->xmeet( x->field_at(i) );
duke@435	1653	return TypeTuple::make(_cnt,fields);
duke@435	1654	}
duke@435	1655	case Top:
duke@435	1656	break;
duke@435	1657	}
duke@435	1658	return this; // Return the double constant
duke@435	1659	}
duke@435	1660
duke@435	1661	//------------------------------xdual------------------------------------------
duke@435	1662	// Dual: compute field-by-field dual
duke@435	1663	const Type *TypeTuple::xdual() const {
duke@435	1664	const Type **fields = (const Type **)(Compile::current()->type_arena()->Amalloc_4( _cnt*sizeof(Type*) ));
duke@435	1665	for( uint i=0; i<_cnt; i++ )
duke@435	1666	fields[i] = _fields[i]->dual();
duke@435	1667	return new TypeTuple(_cnt,fields);
duke@435	1668	}
duke@435	1669
duke@435	1670	//------------------------------eq---------------------------------------------
duke@435	1671	// Structural equality check for Type representations
duke@435	1672	bool TypeTuple::eq( const Type *t ) const {
duke@435	1673	const TypeTuple *s = (const TypeTuple *)t;
duke@435	1674	if (_cnt != s->_cnt) return false; // Unequal field counts
duke@435	1675	for (uint i = 0; i < _cnt; i++)
duke@435	1676	if (field_at(i) != s->field_at(i)) // POINTER COMPARE! NO RECURSION!
duke@435	1677	return false; // Missed
duke@435	1678	return true;
duke@435	1679	}
duke@435	1680
duke@435	1681	//------------------------------hash-------------------------------------------
duke@435	1682	// Type-specific hashing function.
duke@435	1683	int TypeTuple::hash(void) const {
duke@435	1684	intptr_t sum = _cnt;
duke@435	1685	for( uint i=0; i<_cnt; i++ )
duke@435	1686	sum += (intptr_t)_fields[i]; // Hash on pointers directly
duke@435	1687	return sum;
duke@435	1688	}
duke@435	1689
duke@435	1690	//------------------------------dump2------------------------------------------
duke@435	1691	// Dump signature Type
duke@435	1692	#ifndef PRODUCT
duke@435	1693	void TypeTuple::dump2( Dict &d, uint depth, outputStream *st ) const {
duke@435	1694	st->print("{");
duke@435	1695	if( !depth || d[this] ) { // Check for recursive print
duke@435	1696	st->print("...}");
duke@435	1697	return;
duke@435	1698	}
duke@435	1699	d.Insert((void*)this, (void*)this); // Stop recursion
duke@435	1700	if( _cnt ) {
duke@435	1701	uint i;
duke@435	1702	for( i=0; i<_cnt-1; i++ ) {
duke@435	1703	st->print("%d:", i);
duke@435	1704	_fields[i]->dump2(d, depth-1, st);
duke@435	1705	st->print(", ");
duke@435	1706	}
duke@435	1707	st->print("%d:", i);
duke@435	1708	_fields[i]->dump2(d, depth-1, st);
duke@435	1709	}
duke@435	1710	st->print("}");
duke@435	1711	}
duke@435	1712	#endif
duke@435	1713
duke@435	1714	//------------------------------singleton--------------------------------------
duke@435	1715	// TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
duke@435	1716	// constants (Ldi nodes). Singletons are integer, float or double constants
duke@435	1717	// or a single symbol.
duke@435	1718	bool TypeTuple::singleton(void) const {
duke@435	1719	return false; // Never a singleton
duke@435	1720	}
duke@435	1721
duke@435	1722	bool TypeTuple::empty(void) const {
duke@435	1723	for( uint i=0; i<_cnt; i++ ) {
duke@435	1724	if (_fields[i]->empty()) return true;
duke@435	1725	}
duke@435	1726	return false;
duke@435	1727	}
duke@435	1728
duke@435	1729	//=============================================================================
duke@435	1730	// Convenience common pre-built types.
duke@435	1731
duke@435	1732	inline const TypeInt* normalize_array_size(const TypeInt* size) {
duke@435	1733	// Certain normalizations keep us sane when comparing types.
duke@435	1734	// We do not want arrayOop variables to differ only by the wideness
duke@435	1735	// of their index types. Pick minimum wideness, since that is the
duke@435	1736	// forced wideness of small ranges anyway.
duke@435	1737	if (size->_widen != Type::WidenMin)
duke@435	1738	return TypeInt::make(size->_lo, size->_hi, Type::WidenMin);
duke@435	1739	else
duke@435	1740	return size;
duke@435	1741	}
duke@435	1742
duke@435	1743	//------------------------------make-------------------------------------------
duke@435	1744	const TypeAry *TypeAry::make( const Type *elem, const TypeInt *size) {
coleenp@548	1745	if (UseCompressedOops && elem->isa_oopptr()) {
kvn@656	1746	elem = elem->make_narrowoop();
coleenp@548	1747	}
duke@435	1748	size = normalize_array_size(size);
duke@435	1749	return (TypeAry*)(new TypeAry(elem,size))->hashcons();
duke@435	1750	}
duke@435	1751
duke@435	1752	//------------------------------meet-------------------------------------------
duke@435	1753	// Compute the MEET of two types. It returns a new Type object.
duke@435	1754	const Type *TypeAry::xmeet( const Type *t ) const {
duke@435	1755	// Perform a fast test for common case; meeting the same types together.
duke@435	1756	if( this == t ) return this; // Meeting same type-rep?
duke@435	1757
duke@435	1758	// Current "this->_base" is Ary
duke@435	1759	switch (t->base()) { // switch on original type
duke@435	1760
duke@435	1761	case Bottom: // Ye Olde Default
duke@435	1762	return t;
duke@435	1763
duke@435	1764	default: // All else is a mistake
duke@435	1765	typerr(t);
duke@435	1766
duke@435	1767	case Array: { // Meeting 2 arrays?
duke@435	1768	const TypeAry *a = t->is_ary();
duke@435	1769	return TypeAry::make(_elem->meet(a->_elem),
duke@435	1770	_size->xmeet(a->_size)->is_int());
duke@435	1771	}
duke@435	1772	case Top:
duke@435	1773	break;
duke@435	1774	}
duke@435	1775	return this; // Return the double constant
duke@435	1776	}
duke@435	1777
duke@435	1778	//------------------------------xdual------------------------------------------
duke@435	1779	// Dual: compute field-by-field dual
duke@435	1780	const Type *TypeAry::xdual() const {
duke@435	1781	const TypeInt* size_dual = _size->dual()->is_int();
duke@435	1782	size_dual = normalize_array_size(size_dual);
duke@435	1783	return new TypeAry( _elem->dual(), size_dual);
duke@435	1784	}
duke@435	1785
duke@435	1786	//------------------------------eq---------------------------------------------
duke@435	1787	// Structural equality check for Type representations
duke@435	1788	bool TypeAry::eq( const Type *t ) const {
duke@435	1789	const TypeAry *a = (const TypeAry*)t;
duke@435	1790	return _elem == a->_elem &&
duke@435	1791	_size == a->_size;
duke@435	1792	}
duke@435	1793
duke@435	1794	//------------------------------hash-------------------------------------------
duke@435	1795	// Type-specific hashing function.
duke@435	1796	int TypeAry::hash(void) const {
duke@435	1797	return (intptr_t)_elem + (intptr_t)_size;
duke@435	1798	}
duke@435	1799
duke@435	1800	//------------------------------dump2------------------------------------------
duke@435	1801	#ifndef PRODUCT
duke@435	1802	void TypeAry::dump2( Dict &d, uint depth, outputStream *st ) const {
duke@435	1803	_elem->dump2(d, depth, st);
duke@435	1804	st->print("[");
duke@435	1805	_size->dump2(d, depth, st);
duke@435	1806	st->print("]");
duke@435	1807	}
duke@435	1808	#endif
duke@435	1809
duke@435	1810	//------------------------------singleton--------------------------------------
duke@435	1811	// TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
duke@435	1812	// constants (Ldi nodes). Singletons are integer, float or double constants
duke@435	1813	// or a single symbol.
duke@435	1814	bool TypeAry::singleton(void) const {
duke@435	1815	return false; // Never a singleton
duke@435	1816	}
duke@435	1817
duke@435	1818	bool TypeAry::empty(void) const {
duke@435	1819	return _elem->empty() || _size->empty();
duke@435	1820	}
duke@435	1821
duke@435	1822	//--------------------------ary_must_be_exact----------------------------------
duke@435	1823	bool TypeAry::ary_must_be_exact() const {
duke@435	1824	if (!UseExactTypes) return false;
duke@435	1825	// This logic looks at the element type of an array, and returns true
duke@435	1826	// if the element type is either a primitive or a final instance class.
duke@435	1827	// In such cases, an array built on this ary must have no subclasses.
duke@435	1828	if (_elem == BOTTOM) return false; // general array not exact
duke@435	1829	if (_elem == TOP ) return false; // inverted general array not exact
coleenp@548	1830	const TypeOopPtr* toop = NULL;
kvn@656	1831	if (UseCompressedOops && _elem->isa_narrowoop()) {
kvn@656	1832	toop = _elem->make_ptr()->isa_oopptr();
coleenp@548	1833	} else {
coleenp@548	1834	toop = _elem->isa_oopptr();
coleenp@548	1835	}
duke@435	1836	if (!toop) return true; // a primitive type, like int
duke@435	1837	ciKlass* tklass = toop->klass();
duke@435	1838	if (tklass == NULL) return false; // unloaded class
duke@435	1839	if (!tklass->is_loaded()) return false; // unloaded class
coleenp@548	1840	const TypeInstPtr* tinst;
coleenp@548	1841	if (_elem->isa_narrowoop())
kvn@656	1842	tinst = _elem->make_ptr()->isa_instptr();
coleenp@548	1843	else
coleenp@548	1844	tinst = _elem->isa_instptr();
kvn@656	1845	if (tinst)
kvn@656	1846	return tklass->as_instance_klass()->is_final();
coleenp@548	1847	const TypeAryPtr* tap;
coleenp@548	1848	if (_elem->isa_narrowoop())
kvn@656	1849	tap = _elem->make_ptr()->isa_aryptr();
coleenp@548	1850	else
coleenp@548	1851	tap = _elem->isa_aryptr();
kvn@656	1852	if (tap)
kvn@656	1853	return tap->ary()->ary_must_be_exact();
duke@435	1854	return false;
duke@435	1855	}
duke@435	1856
duke@435	1857	//=============================================================================
duke@435	1858	// Convenience common pre-built types.
duke@435	1859	const TypePtr *TypePtr::NULL_PTR;
duke@435	1860	const TypePtr *TypePtr::NOTNULL;
duke@435	1861	const TypePtr *TypePtr::BOTTOM;
duke@435	1862
duke@435	1863	//------------------------------meet-------------------------------------------
duke@435	1864	// Meet over the PTR enum
duke@435	1865	const TypePtr::PTR TypePtr::ptr_meet[TypePtr::lastPTR][TypePtr::lastPTR] = {
duke@435	1866	// TopPTR, AnyNull, Constant, Null, NotNull, BotPTR,
duke@435	1867	{ /* Top */ TopPTR, AnyNull, Constant, Null, NotNull, BotPTR,},
duke@435	1868	{ /* AnyNull */ AnyNull, AnyNull, Constant, BotPTR, NotNull, BotPTR,},
duke@435	1869	{ /* Constant*/ Constant, Constant, Constant, BotPTR, NotNull, BotPTR,},
duke@435	1870	{ /* Null */ Null, BotPTR, BotPTR, Null, BotPTR, BotPTR,},
duke@435	1871	{ /* NotNull */ NotNull, NotNull, NotNull, BotPTR, NotNull, BotPTR,},
duke@435	1872	{ /* BotPTR */ BotPTR, BotPTR, BotPTR, BotPTR, BotPTR, BotPTR,}
duke@435	1873	};
duke@435	1874
duke@435	1875	//------------------------------make-------------------------------------------
duke@435	1876	const TypePtr *TypePtr::make( TYPES t, enum PTR ptr, int offset ) {
duke@435	1877	return (TypePtr*)(new TypePtr(t,ptr,offset))->hashcons();
duke@435	1878	}
duke@435	1879
duke@435	1880	//------------------------------cast_to_ptr_type-------------------------------
duke@435	1881	const Type *TypePtr::cast_to_ptr_type(PTR ptr) const {
duke@435	1882	assert(_base == AnyPtr, "subclass must override cast_to_ptr_type");
duke@435	1883	if( ptr == _ptr ) return this;
duke@435	1884	return make(_base, ptr, _offset);
duke@435	1885	}
duke@435	1886
duke@435	1887	//------------------------------get_con----------------------------------------
duke@435	1888	intptr_t TypePtr::get_con() const {
duke@435	1889	assert( _ptr == Null, "" );
duke@435	1890	return _offset;
duke@435	1891	}
duke@435	1892
duke@435	1893	//------------------------------meet-------------------------------------------
duke@435	1894	// Compute the MEET of two types. It returns a new Type object.
duke@435	1895	const Type *TypePtr::xmeet( const Type *t ) const {
duke@435	1896	// Perform a fast test for common case; meeting the same types together.
duke@435	1897	if( this == t ) return this; // Meeting same type-rep?
duke@435	1898
duke@435	1899	// Current "this->_base" is AnyPtr
duke@435	1900	switch (t->base()) { // switch on original type
duke@435	1901	case Int: // Mixing ints & oops happens when javac
duke@435	1902	case Long: // reuses local variables
duke@435	1903	case FloatTop:
duke@435	1904	case FloatCon:
duke@435	1905	case FloatBot:
duke@435	1906	case DoubleTop:
duke@435	1907	case DoubleCon:
duke@435	1908	case DoubleBot:
coleenp@548	1909	case NarrowOop:
duke@435	1910	case Bottom: // Ye Olde Default
duke@435	1911	return Type::BOTTOM;
duke@435	1912	case Top:
duke@435	1913	return this;
duke@435	1914
duke@435	1915	case AnyPtr: { // Meeting to AnyPtrs
duke@435	1916	const TypePtr *tp = t->is_ptr();
duke@435	1917	return make( AnyPtr, meet_ptr(tp->ptr()), meet_offset(tp->offset()) );
duke@435	1918	}
duke@435	1919	case RawPtr: // For these, flip the call around to cut down
duke@435	1920	case OopPtr:
duke@435	1921	case InstPtr: // on the cases I have to handle.
duke@435	1922	case KlassPtr:
duke@435	1923	case AryPtr:
duke@435	1924	return t->xmeet(this); // Call in reverse direction
duke@435	1925	default: // All else is a mistake
duke@435	1926	typerr(t);
duke@435	1927
duke@435	1928	}
duke@435	1929	return this;
duke@435	1930	}
duke@435	1931
duke@435	1932	//------------------------------meet_offset------------------------------------
duke@435	1933	int TypePtr::meet_offset( int offset ) const {
duke@435	1934	// Either is 'TOP' offset? Return the other offset!
duke@435	1935	if( _offset == OffsetTop ) return offset;
duke@435	1936	if( offset == OffsetTop ) return _offset;
duke@435	1937	// If either is different, return 'BOTTOM' offset
duke@435	1938	if( _offset != offset ) return OffsetBot;
duke@435	1939	return _offset;
duke@435	1940	}
duke@435	1941
duke@435	1942	//------------------------------dual_offset------------------------------------
duke@435	1943	int TypePtr::dual_offset( ) const {
duke@435	1944	if( _offset == OffsetTop ) return OffsetBot;// Map 'TOP' into 'BOTTOM'
duke@435	1945	if( _offset == OffsetBot ) return OffsetTop;// Map 'BOTTOM' into 'TOP'
duke@435	1946	return _offset; // Map everything else into self
duke@435	1947	}
duke@435	1948
duke@435	1949	//------------------------------xdual------------------------------------------
duke@435	1950	// Dual: compute field-by-field dual
duke@435	1951	const TypePtr::PTR TypePtr::ptr_dual[TypePtr::lastPTR] = {
duke@435	1952	BotPTR, NotNull, Constant, Null, AnyNull, TopPTR
duke@435	1953	};
duke@435	1954	const Type *TypePtr::xdual() const {
duke@435	1955	return new TypePtr( AnyPtr, dual_ptr(), dual_offset() );
duke@435	1956	}
duke@435	1957
duke@435	1958	//------------------------------add_offset-------------------------------------
duke@435	1959	const TypePtr *TypePtr::add_offset( int offset ) const {
duke@435	1960	if( offset == 0 ) return this; // No change
duke@435	1961	if( _offset == OffsetBot ) return this;
duke@435	1962	if( offset == OffsetBot ) offset = OffsetBot;
duke@435	1963	else if( _offset == OffsetTop || offset == OffsetTop ) offset = OffsetTop;
duke@435	1964	else offset += _offset;
duke@435	1965	return make( AnyPtr, _ptr, offset );
duke@435	1966	}
duke@435	1967
duke@435	1968	//------------------------------eq---------------------------------------------
duke@435	1969	// Structural equality check for Type representations
duke@435	1970	bool TypePtr::eq( const Type *t ) const {
duke@435	1971	const TypePtr *a = (const TypePtr*)t;
duke@435	1972	return _ptr == a->ptr() && _offset == a->offset();
duke@435	1973	}
duke@435	1974
duke@435	1975	//------------------------------hash-------------------------------------------
duke@435	1976	// Type-specific hashing function.
duke@435	1977	int TypePtr::hash(void) const {
duke@435	1978	return _ptr + _offset;
duke@435	1979	}
duke@435	1980
duke@435	1981	//------------------------------dump2------------------------------------------
duke@435	1982	const char *const TypePtr::ptr_msg[TypePtr::lastPTR] = {
duke@435	1983	"TopPTR","AnyNull","Constant","NULL","NotNull","BotPTR"
duke@435	1984	};
duke@435	1985
duke@435	1986	#ifndef PRODUCT
duke@435	1987	void TypePtr::dump2( Dict &d, uint depth, outputStream *st ) const {
duke@435	1988	if( _ptr == Null ) st->print("NULL");
duke@435	1989	else st->print("%s *", ptr_msg[_ptr]);
duke@435	1990	if( _offset == OffsetTop ) st->print("+top");
duke@435	1991	else if( _offset == OffsetBot ) st->print("+bot");
duke@435	1992	else if( _offset ) st->print("+%d", _offset);
duke@435	1993	}
duke@435	1994	#endif
duke@435	1995
duke@435	1996	//------------------------------singleton--------------------------------------
duke@435	1997	// TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
duke@435	1998	// constants
duke@435	1999	bool TypePtr::singleton(void) const {
duke@435	2000	// TopPTR, Null, AnyNull, Constant are all singletons
duke@435	2001	return (_offset != OffsetBot) && !below_centerline(_ptr);
duke@435	2002	}
duke@435	2003
duke@435	2004	bool TypePtr::empty(void) const {
duke@435	2005	return (_offset == OffsetTop) || above_centerline(_ptr);
duke@435	2006	}
duke@435	2007
duke@435	2008	//=============================================================================
duke@435	2009	// Convenience common pre-built types.
duke@435	2010	const TypeRawPtr *TypeRawPtr::BOTTOM;
duke@435	2011	const TypeRawPtr *TypeRawPtr::NOTNULL;
duke@435	2012
duke@435	2013	//------------------------------make-------------------------------------------
duke@435	2014	const TypeRawPtr *TypeRawPtr::make( enum PTR ptr ) {
duke@435	2015	assert( ptr != Constant, "what is the constant?" );
duke@435	2016	assert( ptr != Null, "Use TypePtr for NULL" );
duke@435	2017	return (TypeRawPtr*)(new TypeRawPtr(ptr,0))->hashcons();
duke@435	2018	}
duke@435	2019
duke@435	2020	const TypeRawPtr *TypeRawPtr::make( address bits ) {
duke@435	2021	assert( bits, "Use TypePtr for NULL" );
duke@435	2022	return (TypeRawPtr*)(new TypeRawPtr(Constant,bits))->hashcons();
duke@435	2023	}
duke@435	2024
duke@435	2025	//------------------------------cast_to_ptr_type-------------------------------
duke@435	2026	const Type *TypeRawPtr::cast_to_ptr_type(PTR ptr) const {
duke@435	2027	assert( ptr != Constant, "what is the constant?" );
duke@435	2028	assert( ptr != Null, "Use TypePtr for NULL" );
duke@435	2029	assert( _bits==0, "Why cast a constant address?");
duke@435	2030	if( ptr == _ptr ) return this;
duke@435	2031	return make(ptr);
duke@435	2032	}
duke@435	2033
duke@435	2034	//------------------------------get_con----------------------------------------
duke@435	2035	intptr_t TypeRawPtr::get_con() const {
duke@435	2036	assert( _ptr == Null || _ptr == Constant, "" );
duke@435	2037	return (intptr_t)_bits;
duke@435	2038	}
duke@435	2039
duke@435	2040	//------------------------------meet-------------------------------------------
duke@435	2041	// Compute the MEET of two types. It returns a new Type object.
duke@435	2042	const Type *TypeRawPtr::xmeet( const Type *t ) const {
duke@435	2043	// Perform a fast test for common case; meeting the same types together.
duke@435	2044	if( this == t ) return this; // Meeting same type-rep?
duke@435	2045
duke@435	2046	// Current "this->_base" is RawPtr
duke@435	2047	switch( t->base() ) { // switch on original type
duke@435	2048	case Bottom: // Ye Olde Default
duke@435	2049	return t;
duke@435	2050	case Top:
duke@435	2051	return this;
duke@435	2052	case AnyPtr: // Meeting to AnyPtrs
duke@435	2053	break;
duke@435	2054	case RawPtr: { // might be top, bot, any/not or constant
duke@435	2055	enum PTR tptr = t->is_ptr()->ptr();
duke@435	2056	enum PTR ptr = meet_ptr( tptr );
duke@435	2057	if( ptr == Constant ) { // Cannot be equal constants, so...
duke@435	2058	if( tptr == Constant && _ptr != Constant) return t;
duke@435	2059	if( _ptr == Constant && tptr != Constant) return this;
duke@435	2060	ptr = NotNull; // Fall down in lattice
duke@435	2061	}
duke@435	2062	return make( ptr );
duke@435	2063	}
duke@435	2064
duke@435	2065	case OopPtr:
duke@435	2066	case InstPtr:
duke@435	2067	case KlassPtr:
duke@435	2068	case AryPtr:
duke@435	2069	return TypePtr::BOTTOM; // Oop meet raw is not well defined
duke@435	2070	default: // All else is a mistake
duke@435	2071	typerr(t);
duke@435	2072	}
duke@435	2073
duke@435	2074	// Found an AnyPtr type vs self-RawPtr type
duke@435	2075	const TypePtr *tp = t->is_ptr();
duke@435	2076	switch (tp->ptr()) {
duke@435	2077	case TypePtr::TopPTR: return this;
duke@435	2078	case TypePtr::BotPTR: return t;
duke@435	2079	case TypePtr::Null:
duke@435	2080	if( _ptr == TypePtr::TopPTR ) return t;
duke@435	2081	return TypeRawPtr::BOTTOM;
duke@435	2082	case TypePtr::NotNull: return TypePtr::make( AnyPtr, meet_ptr(TypePtr::NotNull), tp->meet_offset(0) );
duke@435	2083	case TypePtr::AnyNull:
duke@435	2084	if( _ptr == TypePtr::Constant) return this;
duke@435	2085	return make( meet_ptr(TypePtr::AnyNull) );
duke@435	2086	default: ShouldNotReachHere();
duke@435	2087	}
duke@435	2088	return this;
duke@435	2089	}
duke@435	2090
duke@435	2091	//------------------------------xdual------------------------------------------
duke@435	2092	// Dual: compute field-by-field dual
duke@435	2093	const Type *TypeRawPtr::xdual() const {
duke@435	2094	return new TypeRawPtr( dual_ptr(), _bits );
duke@435	2095	}
duke@435	2096
duke@435	2097	//------------------------------add_offset-------------------------------------
duke@435	2098	const TypePtr *TypeRawPtr::add_offset( int offset ) const {
duke@435	2099	if( offset == OffsetTop ) return BOTTOM; // Undefined offset-> undefined pointer
duke@435	2100	if( offset == OffsetBot ) return BOTTOM; // Unknown offset-> unknown pointer
duke@435	2101	if( offset == 0 ) return this; // No change
duke@435	2102	switch (_ptr) {
duke@435	2103	case TypePtr::TopPTR:
duke@435	2104	case TypePtr::BotPTR:
duke@435	2105	case TypePtr::NotNull:
duke@435	2106	return this;
duke@435	2107	case TypePtr::Null:
duke@435	2108	case TypePtr::Constant:
duke@435	2109	return make( _bits+offset );
duke@435	2110	default: ShouldNotReachHere();
duke@435	2111	}
duke@435	2112	return NULL; // Lint noise
duke@435	2113	}
duke@435	2114
duke@435	2115	//------------------------------eq---------------------------------------------
duke@435	2116	// Structural equality check for Type representations
duke@435	2117	bool TypeRawPtr::eq( const Type *t ) const {
duke@435	2118	const TypeRawPtr *a = (const TypeRawPtr*)t;
duke@435	2119	return _bits == a->_bits && TypePtr::eq(t);
duke@435	2120	}
duke@435	2121
duke@435	2122	//------------------------------hash-------------------------------------------
duke@435	2123	// Type-specific hashing function.
duke@435	2124	int TypeRawPtr::hash(void) const {
duke@435	2125	return (intptr_t)_bits + TypePtr::hash();
duke@435	2126	}
duke@435	2127
duke@435	2128	//------------------------------dump2------------------------------------------
duke@435	2129	#ifndef PRODUCT
duke@435	2130	void TypeRawPtr::dump2( Dict &d, uint depth, outputStream *st ) const {
duke@435	2131	if( _ptr == Constant )
duke@435	2132	st->print(INTPTR_FORMAT, _bits);
duke@435	2133	else
duke@435	2134	st->print("rawptr:%s", ptr_msg[_ptr]);
duke@435	2135	}
duke@435	2136	#endif
duke@435	2137
duke@435	2138	//=============================================================================
duke@435	2139	// Convenience common pre-built type.
duke@435	2140	const TypeOopPtr *TypeOopPtr::BOTTOM;
duke@435	2141
kvn@598	2142	//------------------------------TypeOopPtr-------------------------------------
kvn@598	2143	TypeOopPtr::TypeOopPtr( TYPES t, PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id )
kvn@598	2144	: TypePtr(t, ptr, offset),
kvn@598	2145	_const_oop(o), _klass(k),
kvn@598	2146	_klass_is_exact(xk),
kvn@598	2147	_is_ptr_to_narrowoop(false),
kvn@598	2148	_instance_id(instance_id) {
kvn@598	2149	#ifdef _LP64
kvn@598	2150	if (UseCompressedOops && _offset != 0) {
kvn@598	2151	if (klass() == NULL) {
kvn@598	2152	assert(this->isa_aryptr(), "only arrays without klass");
kvn@598	2153	_is_ptr_to_narrowoop = true;
kvn@598	2154	} else if (_offset == oopDesc::klass_offset_in_bytes()) {
kvn@598	2155	_is_ptr_to_narrowoop = true;
kvn@598	2156	} else if (this->isa_aryptr()) {
kvn@598	2157	_is_ptr_to_narrowoop = (klass()->is_obj_array_klass() &&
kvn@598	2158	_offset != arrayOopDesc::length_offset_in_bytes());
kvn@598	2159	} else if (klass() == ciEnv::current()->Class_klass() &&
kvn@598	2160	(_offset == java_lang_Class::klass_offset_in_bytes() ||
kvn@598	2161	_offset == java_lang_Class::array_klass_offset_in_bytes())) {
kvn@598	2162	// Special hidden fields from the Class.
kvn@598	2163	assert(this->isa_instptr(), "must be an instance ptr.");
kvn@598	2164	_is_ptr_to_narrowoop = true;
kvn@598	2165	} else if (klass()->is_instance_klass()) {
kvn@598	2166	ciInstanceKlass* ik = klass()->as_instance_klass();
kvn@598	2167	ciField* field = NULL;
kvn@598	2168	if (this->isa_klassptr()) {
kvn@598	2169	// Perm objects don't use compressed references, except for
kvn@598	2170	// static fields which are currently compressed.
kvn@598	2171	field = ik->get_field_by_offset(_offset, true);
kvn@598	2172	if (field != NULL) {
kvn@598	2173	BasicType basic_elem_type = field->layout_type();
kvn@598	2174	_is_ptr_to_narrowoop = (basic_elem_type == T_OBJECT ||
kvn@598	2175	basic_elem_type == T_ARRAY);
kvn@598	2176	}
kvn@598	2177	} else if (_offset == OffsetBot || _offset == OffsetTop) {
kvn@598	2178	// unsafe access
kvn@598	2179	_is_ptr_to_narrowoop = true;
kvn@598	2180	} else { // exclude unsafe ops
kvn@598	2181	assert(this->isa_instptr(), "must be an instance ptr.");
kvn@598	2182	// Field which contains a compressed oop references.
kvn@598	2183	field = ik->get_field_by_offset(_offset, false);
kvn@598	2184	if (field != NULL) {
kvn@598	2185	BasicType basic_elem_type = field->layout_type();
kvn@598	2186	_is_ptr_to_narrowoop = (basic_elem_type == T_OBJECT ||
kvn@598	2187	basic_elem_type == T_ARRAY);
kvn@598	2188	} else if (klass()->equals(ciEnv::current()->Object_klass())) {
kvn@598	2189	// Compile::find_alias_type() cast exactness on all types to verify
kvn@598	2190	// that it does not affect alias type.
kvn@598	2191	_is_ptr_to_narrowoop = true;
kvn@598	2192	} else {
kvn@598	2193	// Type for the copy start in LibraryCallKit::inline_native_clone().
kvn@598	2194	assert(!klass_is_exact(), "only non-exact klass");
kvn@598	2195	_is_ptr_to_narrowoop = true;
kvn@598	2196	}
kvn@598	2197	}
kvn@598	2198	}
kvn@598	2199	}
kvn@598	2200	#endif
kvn@598	2201	}
kvn@598	2202
duke@435	2203	//------------------------------make-------------------------------------------
duke@435	2204	const TypeOopPtr *TypeOopPtr::make(PTR ptr,
duke@435	2205	int offset) {
duke@435	2206	assert(ptr != Constant, "no constant generic pointers");
duke@435	2207	ciKlass* k = ciKlassKlass::make();
duke@435	2208	bool xk = false;
duke@435	2209	ciObject* o = NULL;
kvn@658	2210	return (TypeOopPtr*)(new TypeOopPtr(OopPtr, ptr, k, xk, o, offset, InstanceBot))->hashcons();
duke@435	2211	}
duke@435	2212
duke@435	2213
duke@435	2214	//------------------------------cast_to_ptr_type-------------------------------
duke@435	2215	const Type *TypeOopPtr::cast_to_ptr_type(PTR ptr) const {
duke@435	2216	assert(_base == OopPtr, "subclass must override cast_to_ptr_type");
duke@435	2217	if( ptr == _ptr ) return this;
duke@435	2218	return make(ptr, _offset);
duke@435	2219	}
duke@435	2220
kvn@682	2221	//-----------------------------cast_to_instance_id----------------------------
kvn@658	2222	const TypeOopPtr *TypeOopPtr::cast_to_instance_id(int instance_id) const {
duke@435	2223	// There are no instances of a general oop.
duke@435	2224	// Return self unchanged.
duke@435	2225	return this;
duke@435	2226	}
duke@435	2227
duke@435	2228	//-----------------------------cast_to_exactness-------------------------------
duke@435	2229	const Type *TypeOopPtr::cast_to_exactness(bool klass_is_exact) const {
duke@435	2230	// There is no such thing as an exact general oop.
duke@435	2231	// Return self unchanged.
duke@435	2232	return this;
duke@435	2233	}
duke@435	2234
duke@435	2235
duke@435	2236	//------------------------------as_klass_type----------------------------------
duke@435	2237	// Return the klass type corresponding to this instance or array type.
duke@435	2238	// It is the type that is loaded from an object of this type.
duke@435	2239	const TypeKlassPtr* TypeOopPtr::as_klass_type() const {
duke@435	2240	ciKlass* k = klass();
duke@435	2241	bool xk = klass_is_exact();
duke@435	2242	if (k == NULL || !k->is_java_klass())
duke@435	2243	return TypeKlassPtr::OBJECT;
duke@435	2244	else
duke@435	2245	return TypeKlassPtr::make(xk? Constant: NotNull, k, 0);
duke@435	2246	}
duke@435	2247
duke@435	2248
duke@435	2249	//------------------------------meet-------------------------------------------
duke@435	2250	// Compute the MEET of two types. It returns a new Type object.
duke@435	2251	const Type *TypeOopPtr::xmeet( const Type *t ) const {
duke@435	2252	// Perform a fast test for common case; meeting the same types together.
duke@435	2253	if( this == t ) return this; // Meeting same type-rep?
duke@435	2254
duke@435	2255	// Current "this->_base" is OopPtr
duke@435	2256	switch (t->base()) { // switch on original type
duke@435	2257
duke@435	2258	case Int: // Mixing ints & oops happens when javac
duke@435	2259	case Long: // reuses local variables
duke@435	2260	case FloatTop:
duke@435	2261	case FloatCon:
duke@435	2262	case FloatBot:
duke@435	2263	case DoubleTop:
duke@435	2264	case DoubleCon:
duke@435	2265	case DoubleBot:
duke@435	2266	case Bottom: // Ye Olde Default
duke@435	2267	return Type::BOTTOM;
duke@435	2268	case Top:
duke@435	2269	return this;
duke@435	2270
duke@435	2271	default: // All else is a mistake
duke@435	2272	typerr(t);
duke@435	2273
duke@435	2274	case RawPtr:
duke@435	2275	return TypePtr::BOTTOM; // Oop meet raw is not well defined
duke@435	2276
duke@435	2277	case AnyPtr: {
duke@435	2278	// Found an AnyPtr type vs self-OopPtr type
duke@435	2279	const TypePtr *tp = t->is_ptr();
duke@435	2280	int offset = meet_offset(tp->offset());
duke@435	2281	PTR ptr = meet_ptr(tp->ptr());
duke@435	2282	switch (tp->ptr()) {
duke@435	2283	case Null:
duke@435	2284	if (ptr == Null) return TypePtr::make(AnyPtr, ptr, offset);
duke@435	2285	// else fall through:
duke@435	2286	case TopPTR:
duke@435	2287	case AnyNull:
duke@435	2288	return make(ptr, offset);
duke@435	2289	case BotPTR:
duke@435	2290	case NotNull:
duke@435	2291	return TypePtr::make(AnyPtr, ptr, offset);
duke@435	2292	default: typerr(t);
duke@435	2293	}
duke@435	2294	}
duke@435	2295
duke@435	2296	case OopPtr: { // Meeting to other OopPtrs
duke@435	2297	const TypeOopPtr *tp = t->is_oopptr();
duke@435	2298	return make( meet_ptr(tp->ptr()), meet_offset(tp->offset()) );
duke@435	2299	}
duke@435	2300
duke@435	2301	case InstPtr: // For these, flip the call around to cut down
duke@435	2302	case KlassPtr: // on the cases I have to handle.
duke@435	2303	case AryPtr:
duke@435	2304	return t->xmeet(this); // Call in reverse direction
duke@435	2305
duke@435	2306	} // End of switch
duke@435	2307	return this; // Return the double constant
duke@435	2308	}
duke@435	2309
duke@435	2310
duke@435	2311	//------------------------------xdual------------------------------------------
duke@435	2312	// Dual of a pure heap pointer. No relevant klass or oop information.
duke@435	2313	const Type *TypeOopPtr::xdual() const {
duke@435	2314	assert(klass() == ciKlassKlass::make(), "no klasses here");
duke@435	2315	assert(const_oop() == NULL, "no constants here");
kvn@658	2316	return new TypeOopPtr(_base, dual_ptr(), klass(), klass_is_exact(), const_oop(), dual_offset(), dual_instance_id() );
duke@435	2317	}
duke@435	2318
duke@435	2319	//--------------------------make_from_klass_common-----------------------------
duke@435	2320	// Computes the element-type given a klass.
duke@435	2321	const TypeOopPtr* TypeOopPtr::make_from_klass_common(ciKlass *klass, bool klass_change, bool try_for_exact) {
duke@435	2322	assert(klass->is_java_klass(), "must be java language klass");
duke@435	2323	if (klass->is_instance_klass()) {
duke@435	2324	Compile* C = Compile::current();
duke@435	2325	Dependencies* deps = C->dependencies();
duke@435	2326	assert((deps != NULL) == (C->method() != NULL && C->method()->code_size() > 0), "sanity");
duke@435	2327	// Element is an instance
duke@435	2328	bool klass_is_exact = false;
duke@435	2329	if (klass->is_loaded()) {
duke@435	2330	// Try to set klass_is_exact.
duke@435	2331	ciInstanceKlass* ik = klass->as_instance_klass();
duke@435	2332	klass_is_exact = ik->is_final();
duke@435	2333	if (!klass_is_exact && klass_change
duke@435	2334	&& deps != NULL && UseUniqueSubclasses) {
duke@435	2335	ciInstanceKlass* sub = ik->unique_concrete_subklass();
duke@435	2336	if (sub != NULL) {
duke@435	2337	deps->assert_abstract_with_unique_concrete_subtype(ik, sub);
duke@435	2338	klass = ik = sub;
duke@435	2339	klass_is_exact = sub->is_final();
duke@435	2340	}
duke@435	2341	}
duke@435	2342	if (!klass_is_exact && try_for_exact
duke@435	2343	&& deps != NULL && UseExactTypes) {
duke@435	2344	if (!ik->is_interface() && !ik->has_subklass()) {
duke@435	2345	// Add a dependence; if concrete subclass added we need to recompile
duke@435	2346	deps->assert_leaf_type(ik);
duke@435	2347	klass_is_exact = true;
duke@435	2348	}
duke@435	2349	}
duke@435	2350	}
duke@435	2351	return TypeInstPtr::make(TypePtr::BotPTR, klass, klass_is_exact, NULL, 0);
duke@435	2352	} else if (klass->is_obj_array_klass()) {
duke@435	2353	// Element is an object array. Recursively call ourself.
duke@435	2354	const TypeOopPtr *etype = TypeOopPtr::make_from_klass_common(klass->as_obj_array_klass()->element_klass(), false, try_for_exact);
duke@435	2355	bool xk = etype->klass_is_exact();
duke@435	2356	const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS);
duke@435	2357	// We used to pass NotNull in here, asserting that the sub-arrays
duke@435	2358	// are all not-null. This is not true in generally, as code can
duke@435	2359	// slam NULLs down in the subarrays.
duke@435	2360	const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, xk, 0);
duke@435	2361	return arr;
duke@435	2362	} else if (klass->is_type_array_klass()) {
duke@435	2363	// Element is an typeArray
duke@435	2364	const Type* etype = get_const_basic_type(klass->as_type_array_klass()->element_type());
duke@435	2365	const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS);
duke@435	2366	// We used to pass NotNull in here, asserting that the array pointer
duke@435	2367	// is not-null. That was not true in general.
duke@435	2368	const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, true, 0);
duke@435	2369	return arr;
duke@435	2370	} else {
duke@435	2371	ShouldNotReachHere();
duke@435	2372	return NULL;
duke@435	2373	}
duke@435	2374	}
duke@435	2375
duke@435	2376	//------------------------------make_from_constant-----------------------------
duke@435	2377	// Make a java pointer from an oop constant
duke@435	2378	const TypeOopPtr* TypeOopPtr::make_from_constant(ciObject* o) {
duke@435	2379	if (o->is_method_data() || o->is_method()) {
duke@435	2380	// Treat much like a typeArray of bytes, like below, but fake the type...
duke@435	2381	assert(o->has_encoding(), "must be a perm space object");
duke@435	2382	const Type* etype = (Type*)get_const_basic_type(T_BYTE);
duke@435	2383	const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS);
duke@435	2384	ciKlass *klass = ciTypeArrayKlass::make((BasicType) T_BYTE);
duke@435	2385	assert(o->has_encoding(), "method data oops should be tenured");
duke@435	2386	const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0);
duke@435	2387	return arr;
duke@435	2388	} else {
duke@435	2389	assert(o->is_java_object(), "must be java language object");
duke@435	2390	assert(!o->is_null_object(), "null object not yet handled here.");
duke@435	2391	ciKlass *klass = o->klass();
duke@435	2392	if (klass->is_instance_klass()) {
duke@435	2393	// Element is an instance
duke@435	2394	if (!o->has_encoding()) { // not a perm-space constant
duke@435	2395	// %%% remove this restriction by rewriting non-perm ConPNodes in a later phase
duke@435	2396	return TypeInstPtr::make(TypePtr::NotNull, klass, true, NULL, 0);
duke@435	2397	}
duke@435	2398	return TypeInstPtr::make(o);
duke@435	2399	} else if (klass->is_obj_array_klass()) {
duke@435	2400	// Element is an object array. Recursively call ourself.
duke@435	2401	const Type *etype =
duke@435	2402	TypeOopPtr::make_from_klass_raw(klass->as_obj_array_klass()->element_klass());
duke@435	2403	const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length()));
duke@435	2404	// We used to pass NotNull in here, asserting that the sub-arrays
duke@435	2405	// are all not-null. This is not true in generally, as code can
duke@435	2406	// slam NULLs down in the subarrays.
duke@435	2407	if (!o->has_encoding()) { // not a perm-space constant
duke@435	2408	// %%% remove this restriction by rewriting non-perm ConPNodes in a later phase
duke@435	2409	return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0);
duke@435	2410	}
duke@435	2411	const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0);
duke@435	2412	return arr;
duke@435	2413	} else if (klass->is_type_array_klass()) {
duke@435	2414	// Element is an typeArray
duke@435	2415	const Type* etype =
duke@435	2416	(Type*)get_const_basic_type(klass->as_type_array_klass()->element_type());
duke@435	2417	const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length()));
duke@435	2418	// We used to pass NotNull in here, asserting that the array pointer
duke@435	2419	// is not-null. That was not true in general.
duke@435	2420	if (!o->has_encoding()) { // not a perm-space constant
duke@435	2421	// %%% remove this restriction by rewriting non-perm ConPNodes in a later phase
duke@435	2422	return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0);
duke@435	2423	}
duke@435	2424	const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0);
duke@435	2425	return arr;
duke@435	2426	}
duke@435	2427	}
duke@435	2428
duke@435	2429	ShouldNotReachHere();
duke@435	2430	return NULL;
duke@435	2431	}
duke@435	2432
duke@435	2433	//------------------------------get_con----------------------------------------
duke@435	2434	intptr_t TypeOopPtr::get_con() const {
duke@435	2435	assert( _ptr == Null || _ptr == Constant, "" );
duke@435	2436	assert( _offset >= 0, "" );
duke@435	2437
duke@435	2438	if (_offset != 0) {
duke@435	2439	// After being ported to the compiler interface, the compiler no longer
duke@435	2440	// directly manipulates the addresses of oops. Rather, it only has a pointer
duke@435	2441	// to a handle at compile time. This handle is embedded in the generated
duke@435	2442	// code and dereferenced at the time the nmethod is made. Until that time,
duke@435	2443	// it is not reasonable to do arithmetic with the addresses of oops (we don't
duke@435	2444	// have access to the addresses!). This does not seem to currently happen,
duke@435	2445	// but this assertion here is to help prevent its occurrance.
duke@435	2446	tty->print_cr("Found oop constant with non-zero offset");
duke@435	2447	ShouldNotReachHere();
duke@435	2448	}
duke@435	2449
duke@435	2450	return (intptr_t)const_oop()->encoding();
duke@435	2451	}
duke@435	2452
duke@435	2453
duke@435	2454	//-----------------------------filter------------------------------------------
duke@435	2455	// Do not allow interface-vs.-noninterface joins to collapse to top.
duke@435	2456	const Type *TypeOopPtr::filter( const Type *kills ) const {
duke@435	2457
duke@435	2458	const Type* ft = join(kills);
duke@435	2459	const TypeInstPtr* ftip = ft->isa_instptr();
duke@435	2460	const TypeInstPtr* ktip = kills->isa_instptr();
duke@435	2461
duke@435	2462	if (ft->empty()) {
duke@435	2463	// Check for evil case of 'this' being a class and 'kills' expecting an
duke@435	2464	// interface. This can happen because the bytecodes do not contain
duke@435	2465	// enough type info to distinguish a Java-level interface variable
duke@435	2466	// from a Java-level object variable. If we meet 2 classes which
duke@435	2467	// both implement interface I, but their meet is at 'j/l/O' which
duke@435	2468	// doesn't implement I, we have no way to tell if the result should
duke@435	2469	// be 'I' or 'j/l/O'. Thus we'll pick 'j/l/O'. If this then flows
duke@435	2470	// into a Phi which "knows" it's an Interface type we'll have to
duke@435	2471	// uplift the type.
duke@435	2472	if (!empty() && ktip != NULL && ktip->is_loaded() && ktip->klass()->is_interface())
duke@435	2473	return kills; // Uplift to interface
duke@435	2474
duke@435	2475	return Type::TOP; // Canonical empty value
duke@435	2476	}
duke@435	2477
duke@435	2478	// If we have an interface-typed Phi or cast and we narrow to a class type,
duke@435	2479	// the join should report back the class. However, if we have a J/L/Object
duke@435	2480	// class-typed Phi and an interface flows in, it's possible that the meet &
duke@435	2481	// join report an interface back out. This isn't possible but happens
duke@435	2482	// because the type system doesn't interact well with interfaces.
duke@435	2483	if (ftip != NULL && ktip != NULL &&
duke@435	2484	ftip->is_loaded() && ftip->klass()->is_interface() &&
duke@435	2485	ktip->is_loaded() && !ktip->klass()->is_interface()) {
duke@435	2486	// Happens in a CTW of rt.jar, 320-341, no extra flags
duke@435	2487	return ktip->cast_to_ptr_type(ftip->ptr());
duke@435	2488	}
duke@435	2489
duke@435	2490	return ft;
duke@435	2491	}
duke@435	2492
duke@435	2493	//------------------------------eq---------------------------------------------
duke@435	2494	// Structural equality check for Type representations
duke@435	2495	bool TypeOopPtr::eq( const Type *t ) const {
duke@435	2496	const TypeOopPtr *a = (const TypeOopPtr*)t;
duke@435	2497	if (_klass_is_exact != a->_klass_is_exact ||
duke@435	2498	_instance_id != a->_instance_id) return false;
duke@435	2499	ciObject* one = const_oop();
duke@435	2500	ciObject* two = a->const_oop();
duke@435	2501	if (one == NULL || two == NULL) {
duke@435	2502	return (one == two) && TypePtr::eq(t);
duke@435	2503	} else {
duke@435	2504	return one->equals(two) && TypePtr::eq(t);
duke@435	2505	}
duke@435	2506	}
duke@435	2507
duke@435	2508	//------------------------------hash-------------------------------------------
duke@435	2509	// Type-specific hashing function.
duke@435	2510	int TypeOopPtr::hash(void) const {
duke@435	2511	return
duke@435	2512	(const_oop() ? const_oop()->hash() : 0) +
duke@435	2513	_klass_is_exact +
duke@435	2514	_instance_id +
duke@435	2515	TypePtr::hash();
duke@435	2516	}
duke@435	2517
duke@435	2518	//------------------------------dump2------------------------------------------
duke@435	2519	#ifndef PRODUCT
duke@435	2520	void TypeOopPtr::dump2( Dict &d, uint depth, outputStream *st ) const {
duke@435	2521	st->print("oopptr:%s", ptr_msg[_ptr]);
duke@435	2522	if( _klass_is_exact ) st->print(":exact");
duke@435	2523	if( const_oop() ) st->print(INTPTR_FORMAT, const_oop());
duke@435	2524	switch( _offset ) {
duke@435	2525	case OffsetTop: st->print("+top"); break;
duke@435	2526	case OffsetBot: st->print("+any"); break;
duke@435	2527	case 0: break;
duke@435	2528	default: st->print("+%d",_offset); break;
duke@435	2529	}
kvn@658	2530	if (_instance_id == InstanceTop)
kvn@658	2531	st->print(",iid=top");
kvn@658	2532	else if (_instance_id != InstanceBot)
duke@435	2533	st->print(",iid=%d",_instance_id);
duke@435	2534	}
duke@435	2535	#endif
duke@435	2536
duke@435	2537	//------------------------------singleton--------------------------------------
duke@435	2538	// TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
duke@435	2539	// constants
duke@435	2540	bool TypeOopPtr::singleton(void) const {
duke@435	2541	// detune optimizer to not generate constant oop + constant offset as a constant!
duke@435	2542	// TopPTR, Null, AnyNull, Constant are all singletons
duke@435	2543	return (_offset == 0) && !below_centerline(_ptr);
duke@435	2544	}
duke@435	2545
duke@435	2546	//------------------------------xadd_offset------------------------------------
duke@435	2547	int TypeOopPtr::xadd_offset( int offset ) const {
duke@435	2548	// Adding to 'TOP' offset? Return 'TOP'!
duke@435	2549	if( _offset == OffsetTop || offset == OffsetTop ) return OffsetTop;
duke@435	2550	// Adding to 'BOTTOM' offset? Return 'BOTTOM'!
duke@435	2551	if( _offset == OffsetBot || offset == OffsetBot ) return OffsetBot;
duke@435	2552
duke@435	2553	// assert( _offset >= 0 && _offset+offset >= 0, "" );
duke@435	2554	// It is possible to construct a negative offset during PhaseCCP
duke@435	2555
duke@435	2556	return _offset+offset; // Sum valid offsets
duke@435	2557	}
duke@435	2558
duke@435	2559	//------------------------------add_offset-------------------------------------
duke@435	2560	const TypePtr *TypeOopPtr::add_offset( int offset ) const {
duke@435	2561	return make( _ptr, xadd_offset(offset) );
duke@435	2562	}
duke@435	2563
kvn@658	2564	//------------------------------meet_instance_id--------------------------------
kvn@658	2565	int TypeOopPtr::meet_instance_id( int instance_id ) const {
kvn@658	2566	// Either is 'TOP' instance? Return the other instance!
kvn@658	2567	if( _instance_id == InstanceTop ) return instance_id;
kvn@658	2568	if( instance_id == InstanceTop ) return _instance_id;
kvn@658	2569	// If either is different, return 'BOTTOM' instance
kvn@658	2570	if( _instance_id != instance_id ) return InstanceBot;
kvn@658	2571	return _instance_id;
duke@435	2572	}
duke@435	2573
kvn@658	2574	//------------------------------dual_instance_id--------------------------------
kvn@658	2575	int TypeOopPtr::dual_instance_id( ) const {
kvn@658	2576	if( _instance_id == InstanceTop ) return InstanceBot; // Map TOP into BOTTOM
kvn@658	2577	if( _instance_id == InstanceBot ) return InstanceTop; // Map BOTTOM into TOP
kvn@658	2578	return _instance_id; // Map everything else into self
kvn@658	2579	}
kvn@658	2580
kvn@658	2581
duke@435	2582	//=============================================================================
duke@435	2583	// Convenience common pre-built types.
duke@435	2584	const TypeInstPtr *TypeInstPtr::NOTNULL;
duke@435	2585	const TypeInstPtr *TypeInstPtr::BOTTOM;
duke@435	2586	const TypeInstPtr *TypeInstPtr::MIRROR;
duke@435	2587	const TypeInstPtr *TypeInstPtr::MARK;
duke@435	2588	const TypeInstPtr *TypeInstPtr::KLASS;
duke@435	2589
duke@435	2590	//------------------------------TypeInstPtr-------------------------------------
duke@435	2591	TypeInstPtr::TypeInstPtr(PTR ptr, ciKlass* k, bool xk, ciObject* o, int off, int instance_id)
duke@435	2592	: TypeOopPtr(InstPtr, ptr, k, xk, o, off, instance_id), _name(k->name()) {
duke@435	2593	assert(k != NULL &&
duke@435	2594	(k->is_loaded() || o == NULL),
duke@435	2595	"cannot have constants with non-loaded klass");
duke@435	2596	};
duke@435	2597
duke@435	2598	//------------------------------make-------------------------------------------
duke@435	2599	const TypeInstPtr *TypeInstPtr::make(PTR ptr,
duke@435	2600	ciKlass* k,
duke@435	2601	bool xk,
duke@435	2602	ciObject* o,
duke@435	2603	int offset,
duke@435	2604	int instance_id) {
duke@435	2605	assert( !k->is_loaded() || k->is_instance_klass() ||
duke@435	2606	k->is_method_klass(), "Must be for instance or method");
duke@435	2607	// Either const_oop() is NULL or else ptr is Constant
duke@435	2608	assert( (!o && ptr != Constant) || (o && ptr == Constant),
duke@435	2609	"constant pointers must have a value supplied" );
duke@435	2610	// Ptr is never Null
duke@435	2611	assert( ptr != Null, "NULL pointers are not typed" );
duke@435	2612
kvn@682	2613	assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed");
duke@435	2614	if (!UseExactTypes) xk = false;
duke@435	2615	if (ptr == Constant) {
duke@435	2616	// Note: This case includes meta-object constants, such as methods.
duke@435	2617	xk = true;
duke@435	2618	} else if (k->is_loaded()) {
duke@435	2619	ciInstanceKlass* ik = k->as_instance_klass();
duke@435	2620	if (!xk && ik->is_final()) xk = true; // no inexact final klass
duke@435	2621	if (xk && ik->is_interface()) xk = false; // no exact interface
duke@435	2622	}
duke@435	2623
duke@435	2624	// Now hash this baby
duke@435	2625	TypeInstPtr *result =
duke@435	2626	(TypeInstPtr*)(new TypeInstPtr(ptr, k, xk, o ,offset, instance_id))->hashcons();
duke@435	2627
duke@435	2628	return result;
duke@435	2629	}
duke@435	2630
duke@435	2631
duke@435	2632	//------------------------------cast_to_ptr_type-------------------------------
duke@435	2633	const Type *TypeInstPtr::cast_to_ptr_type(PTR ptr) const {
duke@435	2634	if( ptr == _ptr ) return this;
duke@435	2635	// Reconstruct _sig info here since not a problem with later lazy
duke@435	2636	// construction, _sig will show up on demand.
kvn@658	2637	return make(ptr, klass(), klass_is_exact(), const_oop(), _offset, _instance_id);
duke@435	2638	}
duke@435	2639
duke@435	2640
duke@435	2641	//-----------------------------cast_to_exactness-------------------------------
duke@435	2642	const Type *TypeInstPtr::cast_to_exactness(bool klass_is_exact) const {
duke@435	2643	if( klass_is_exact == _klass_is_exact ) return this;
duke@435	2644	if (!UseExactTypes) return this;
duke@435	2645	if (!_klass->is_loaded()) return this;
duke@435	2646	ciInstanceKlass* ik = _klass->as_instance_klass();
duke@435	2647	if( (ik->is_final() || _const_oop) ) return this; // cannot clear xk
duke@435	2648	if( ik->is_interface() ) return this; // cannot set xk
duke@435	2649	return make(ptr(), klass(), klass_is_exact, const_oop(), _offset, _instance_id);
duke@435	2650	}
duke@435	2651
kvn@682	2652	//-----------------------------cast_to_instance_id----------------------------
kvn@658	2653	const TypeOopPtr *TypeInstPtr::cast_to_instance_id(int instance_id) const {
kvn@658	2654	if( instance_id == _instance_id ) return this;
kvn@682	2655	return make(_ptr, klass(), _klass_is_exact, const_oop(), _offset, instance_id);
duke@435	2656	}
duke@435	2657
duke@435	2658	//------------------------------xmeet_unloaded---------------------------------
duke@435	2659	// Compute the MEET of two InstPtrs when at least one is unloaded.
duke@435	2660	// Assume classes are different since called after check for same name/class-loader
duke@435	2661	const TypeInstPtr *TypeInstPtr::xmeet_unloaded(const TypeInstPtr *tinst) const {
duke@435	2662	int off = meet_offset(tinst->offset());
duke@435	2663	PTR ptr = meet_ptr(tinst->ptr());
duke@435	2664
duke@435	2665	const TypeInstPtr *loaded = is_loaded() ? this : tinst;
duke@435	2666	const TypeInstPtr *unloaded = is_loaded() ? tinst : this;
duke@435	2667	if( loaded->klass()->equals(ciEnv::current()->Object_klass()) ) {
duke@435	2668	//
duke@435	2669	// Meet unloaded class with java/lang/Object
duke@435	2670	//
duke@435	2671	// Meet
duke@435	2672	// | Unloaded Class
duke@435	2673	// Object | TOP | AnyNull | Constant | NotNull | BOTTOM |
duke@435	2674	// ===================================================================
duke@435	2675	// TOP | ..........................Unloaded......................|
duke@435	2676	// AnyNull | U-AN |................Unloaded......................|
duke@435	2677	// Constant | ... O-NN .................................. | O-BOT |
duke@435	2678	// NotNull | ... O-NN .................................. | O-BOT |
duke@435	2679	// BOTTOM | ........................Object-BOTTOM ..................|
duke@435	2680	//
duke@435	2681	assert(loaded->ptr() != TypePtr::Null, "insanity check");
duke@435	2682	//
duke@435	2683	if( loaded->ptr() == TypePtr::TopPTR ) { return unloaded; }
duke@435	2684	else if (loaded->ptr() == TypePtr::AnyNull) { return TypeInstPtr::make( ptr, unloaded->klass() ); }
duke@435	2685	else if (loaded->ptr() == TypePtr::BotPTR ) { return TypeInstPtr::BOTTOM; }
duke@435	2686	else if (loaded->ptr() == TypePtr::Constant || loaded->ptr() == TypePtr::NotNull) {
duke@435	2687	if (unloaded->ptr() == TypePtr::BotPTR ) { return TypeInstPtr::BOTTOM; }
duke@435	2688	else { return TypeInstPtr::NOTNULL; }
duke@435	2689	}
duke@435	2690	else if( unloaded->ptr() == TypePtr::TopPTR ) { return unloaded; }
duke@435	2691
duke@435	2692	return unloaded->cast_to_ptr_type(TypePtr::AnyNull)->is_instptr();
duke@435	2693	}
duke@435	2694
duke@435	2695	// Both are unloaded, not the same class, not Object
duke@435	2696	// Or meet unloaded with a different loaded class, not java/lang/Object
duke@435	2697	if( ptr != TypePtr::BotPTR ) {
duke@435	2698	return TypeInstPtr::NOTNULL;
duke@435	2699	}
duke@435	2700	return TypeInstPtr::BOTTOM;
duke@435	2701	}
duke@435	2702
duke@435	2703
duke@435	2704	//------------------------------meet-------------------------------------------
duke@435	2705	// Compute the MEET of two types. It returns a new Type object.
duke@435	2706	const Type *TypeInstPtr::xmeet( const Type *t ) const {
duke@435	2707	// Perform a fast test for common case; meeting the same types together.
duke@435	2708	if( this == t ) return this; // Meeting same type-rep?
duke@435	2709
duke@435	2710	// Current "this->_base" is Pointer
duke@435	2711	switch (t->base()) { // switch on original type
duke@435	2712
duke@435	2713	case Int: // Mixing ints & oops happens when javac
duke@435	2714	case Long: // reuses local variables
duke@435	2715	case FloatTop:
duke@435	2716	case FloatCon:
duke@435	2717	case FloatBot:
duke@435	2718	case DoubleTop:
duke@435	2719	case DoubleCon:
duke@435	2720	case DoubleBot:
coleenp@548	2721	case NarrowOop:
duke@435	2722	case Bottom: // Ye Olde Default
duke@435	2723	return Type::BOTTOM;
duke@435	2724	case Top:
duke@435	2725	return this;
duke@435	2726
duke@435	2727	default: // All else is a mistake
duke@435	2728	typerr(t);
duke@435	2729
duke@435	2730	case RawPtr: return TypePtr::BOTTOM;
duke@435	2731
duke@435	2732	case AryPtr: { // All arrays inherit from Object class
duke@435	2733	const TypeAryPtr *tp = t->is_aryptr();
duke@435	2734	int offset = meet_offset(tp->offset());
duke@435	2735	PTR ptr = meet_ptr(tp->ptr());
kvn@658	2736	int instance_id = meet_instance_id(tp->instance_id());
duke@435	2737	switch (ptr) {
duke@435	2738	case TopPTR:
duke@435	2739	case AnyNull: // Fall 'down' to dual of object klass
duke@435	2740	if (klass()->equals(ciEnv::current()->Object_klass())) {
kvn@658	2741	return TypeAryPtr::make(ptr, tp->ary(), tp->klass(), tp->klass_is_exact(), offset, instance_id);
duke@435	2742	} else {
duke@435	2743	// cannot subclass, so the meet has to fall badly below the centerline
duke@435	2744	ptr = NotNull;
kvn@658	2745	instance_id = InstanceBot;
kvn@658	2746	return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL, offset, instance_id);
duke@435	2747	}
duke@435	2748	case Constant:
duke@435	2749	case NotNull:
duke@435	2750	case BotPTR: // Fall down to object klass
duke@435	2751	// LCA is object_klass, but if we subclass from the top we can do better
duke@435	2752	if( above_centerline(_ptr) ) { // if( _ptr == TopPTR || _ptr == AnyNull )
duke@435	2753	// If 'this' (InstPtr) is above the centerline and it is Object class
duke@435	2754	// then we can subclass in the Java class heirarchy.
duke@435	2755	if (klass()->equals(ciEnv::current()->Object_klass())) {
duke@435	2756	// that is, tp's array type is a subtype of my klass
kvn@658	2757	return TypeAryPtr::make(ptr, tp->ary(), tp->klass(), tp->klass_is_exact(), offset, instance_id);
duke@435	2758	}
duke@435	2759	}
duke@435	2760	// The other case cannot happen, since I cannot be a subtype of an array.
duke@435	2761	// The meet falls down to Object class below centerline.
duke@435	2762	if( ptr == Constant )
duke@435	2763	ptr = NotNull;
kvn@658	2764	instance_id = InstanceBot;
kvn@658	2765	return make( ptr, ciEnv::current()->Object_klass(), false, NULL, offset, instance_id );
duke@435	2766	default: typerr(t);
duke@435	2767	}
duke@435	2768	}
duke@435	2769
duke@435	2770	case OopPtr: { // Meeting to OopPtrs
duke@435	2771	// Found a OopPtr type vs self-InstPtr type
duke@435	2772	const TypePtr *tp = t->is_oopptr();
duke@435	2773	int offset = meet_offset(tp->offset());
duke@435	2774	PTR ptr = meet_ptr(tp->ptr());
duke@435	2775	switch (tp->ptr()) {
duke@435	2776	case TopPTR:
kvn@658	2777	case AnyNull: {
kvn@658	2778	int instance_id = meet_instance_id(InstanceTop);
duke@435	2779	return make(ptr, klass(), klass_is_exact(),
kvn@658	2780	(ptr == Constant ? const_oop() : NULL), offset, instance_id);
kvn@658	2781	}
duke@435	2782	case NotNull:
duke@435	2783	case BotPTR:
duke@435	2784	return TypeOopPtr::make(ptr, offset);
duke@435	2785	default: typerr(t);
duke@435	2786	}
duke@435	2787	}
duke@435	2788
duke@435	2789	case AnyPtr: { // Meeting to AnyPtrs
duke@435	2790	// Found an AnyPtr type vs self-InstPtr type
duke@435	2791	const TypePtr *tp = t->is_ptr();
duke@435	2792	int offset = meet_offset(tp->offset());
duke@435	2793	PTR ptr = meet_ptr(tp->ptr());
duke@435	2794	switch (tp->ptr()) {
duke@435	2795	case Null:
duke@435	2796	if( ptr == Null ) return TypePtr::make( AnyPtr, ptr, offset );
kvn@658	2797	// else fall through to AnyNull
duke@435	2798	case TopPTR:
kvn@658	2799	case AnyNull: {
kvn@658	2800	int instance_id = meet_instance_id(InstanceTop);
duke@435	2801	return make( ptr, klass(), klass_is_exact(),
kvn@658	2802	(ptr == Constant ? const_oop() : NULL), offset, instance_id);
kvn@658	2803	}
duke@435	2804	case NotNull:
duke@435	2805	case BotPTR:
duke@435	2806	return TypePtr::make( AnyPtr, ptr, offset );
duke@435	2807	default: typerr(t);
duke@435	2808	}
duke@435	2809	}
duke@435	2810
duke@435	2811	/*
duke@435	2812	A-top }
duke@435	2813	/ | \ } Tops
duke@435	2814	B-top A-any C-top }
duke@435	2815	| / | \ | } Any-nulls
duke@435	2816	B-any | C-any }
duke@435	2817	| | |
duke@435	2818	B-con A-con C-con } constants; not comparable across classes
duke@435	2819	| | |
duke@435	2820	B-not | C-not }
duke@435	2821	| \ | / | } not-nulls
duke@435	2822	B-bot A-not C-bot }
duke@435	2823	\ | / } Bottoms
duke@435	2824	A-bot }
duke@435	2825	*/
duke@435	2826
duke@435	2827	case InstPtr: { // Meeting 2 Oops?
duke@435	2828	// Found an InstPtr sub-type vs self-InstPtr type
duke@435	2829	const TypeInstPtr *tinst = t->is_instptr();
duke@435	2830	int off = meet_offset( tinst->offset() );
duke@435	2831	PTR ptr = meet_ptr( tinst->ptr() );
kvn@658	2832	int instance_id = meet_instance_id(tinst->instance_id());
duke@435	2833
duke@435	2834	// Check for easy case; klasses are equal (and perhaps not loaded!)
duke@435	2835	// If we have constants, then we created oops so classes are loaded
duke@435	2836	// and we can handle the constants further down. This case handles
duke@435	2837	// both-not-loaded or both-loaded classes
duke@435	2838	if (ptr != Constant && klass()->equals(tinst->klass()) && klass_is_exact() == tinst->klass_is_exact()) {
duke@435	2839	return make( ptr, klass(), klass_is_exact(), NULL, off, instance_id );
duke@435	2840	}
duke@435	2841
duke@435	2842	// Classes require inspection in the Java klass hierarchy. Must be loaded.
duke@435	2843	ciKlass* tinst_klass = tinst->klass();
duke@435	2844	ciKlass* this_klass = this->klass();
duke@435	2845	bool tinst_xk = tinst->klass_is_exact();
duke@435	2846	bool this_xk = this->klass_is_exact();
duke@435	2847	if (!tinst_klass->is_loaded() || !this_klass->is_loaded() ) {
duke@435	2848	// One of these classes has not been loaded
duke@435	2849	const TypeInstPtr *unloaded_meet = xmeet_unloaded(tinst);
duke@435	2850	#ifndef PRODUCT
duke@435	2851	if( PrintOpto && Verbose ) {
duke@435	2852	tty->print("meet of unloaded classes resulted in: "); unloaded_meet->dump(); tty->cr();
duke@435	2853	tty->print(" this == "); this->dump(); tty->cr();
duke@435	2854	tty->print(" tinst == "); tinst->dump(); tty->cr();
duke@435	2855	}
duke@435	2856	#endif
duke@435	2857	return unloaded_meet;
duke@435	2858	}
duke@435	2859
duke@435	2860	// Handle mixing oops and interfaces first.
duke@435	2861	if( this_klass->is_interface() && !tinst_klass->is_interface() ) {
duke@435	2862	ciKlass *tmp = tinst_klass; // Swap interface around
duke@435	2863	tinst_klass = this_klass;
duke@435	2864	this_klass = tmp;
duke@435	2865	bool tmp2 = tinst_xk;
duke@435	2866	tinst_xk = this_xk;
duke@435	2867	this_xk = tmp2;
duke@435	2868	}
duke@435	2869	if (tinst_klass->is_interface() &&
duke@435	2870	!(this_klass->is_interface() ||
duke@435	2871	// Treat java/lang/Object as an honorary interface,
duke@435	2872	// because we need a bottom for the interface hierarchy.
duke@435	2873	this_klass == ciEnv::current()->Object_klass())) {
duke@435	2874	// Oop meets interface!
duke@435	2875
duke@435	2876	// See if the oop subtypes (implements) interface.
duke@435	2877	ciKlass *k;
duke@435	2878	bool xk;
duke@435	2879	if( this_klass->is_subtype_of( tinst_klass ) ) {
duke@435	2880	// Oop indeed subtypes. Now keep oop or interface depending
duke@435	2881	// on whether we are both above the centerline or either is
duke@435	2882	// below the centerline. If we are on the centerline
duke@435	2883	// (e.g., Constant vs. AnyNull interface), use the constant.
duke@435	2884	k = below_centerline(ptr) ? tinst_klass : this_klass;
duke@435	2885	// If we are keeping this_klass, keep its exactness too.
duke@435	2886	xk = below_centerline(ptr) ? tinst_xk : this_xk;
duke@435	2887	} else { // Does not implement, fall to Object
duke@435	2888	// Oop does not implement interface, so mixing falls to Object
duke@435	2889	// just like the verifier does (if both are above the
duke@435	2890	// centerline fall to interface)
duke@435	2891	k = above_centerline(ptr) ? tinst_klass : ciEnv::current()->Object_klass();
duke@435	2892	xk = above_centerline(ptr) ? tinst_xk : false;
duke@435	2893	// Watch out for Constant vs. AnyNull interface.
duke@435	2894	if (ptr == Constant) ptr = NotNull; // forget it was a constant
kvn@682	2895	instance_id = InstanceBot;
duke@435	2896	}
duke@435	2897	ciObject* o = NULL; // the Constant value, if any
duke@435	2898	if (ptr == Constant) {
duke@435	2899	// Find out which constant.
duke@435	2900	o = (this_klass == klass()) ? const_oop() : tinst->const_oop();
duke@435	2901	}
kvn@658	2902	return make( ptr, k, xk, o, off, instance_id );
duke@435	2903	}
duke@435	2904
duke@435	2905	// Either oop vs oop or interface vs interface or interface vs Object
duke@435	2906
duke@435	2907	// !!! Here's how the symmetry requirement breaks down into invariants:
duke@435	2908	// If we split one up & one down AND they subtype, take the down man.
duke@435	2909	// If we split one up & one down AND they do NOT subtype, "fall hard".
duke@435	2910	// If both are up and they subtype, take the subtype class.
duke@435	2911	// If both are up and they do NOT subtype, "fall hard".
duke@435	2912	// If both are down and they subtype, take the supertype class.
duke@435	2913	// If both are down and they do NOT subtype, "fall hard".
duke@435	2914	// Constants treated as down.
duke@435	2915
duke@435	2916	// Now, reorder the above list; observe that both-down+subtype is also
duke@435	2917	// "fall hard"; "fall hard" becomes the default case:
duke@435	2918	// If we split one up & one down AND they subtype, take the down man.
duke@435	2919	// If both are up and they subtype, take the subtype class.
duke@435	2920
duke@435	2921	// If both are down and they subtype, "fall hard".
duke@435	2922	// If both are down and they do NOT subtype, "fall hard".
duke@435	2923	// If both are up and they do NOT subtype, "fall hard".
duke@435	2924	// If we split one up & one down AND they do NOT subtype, "fall hard".
duke@435	2925
duke@435	2926	// If a proper subtype is exact, and we return it, we return it exactly.
duke@435	2927	// If a proper supertype is exact, there can be no subtyping relationship!
duke@435	2928	// If both types are equal to the subtype, exactness is and-ed below the
duke@435	2929	// centerline and or-ed above it. (N.B. Constants are always exact.)
duke@435	2930
duke@435	2931	// Check for subtyping:
duke@435	2932	ciKlass *subtype = NULL;
duke@435	2933	bool subtype_exact = false;
duke@435	2934	if( tinst_klass->equals(this_klass) ) {
duke@435	2935	subtype = this_klass;
duke@435	2936	subtype_exact = below_centerline(ptr) ? (this_xk & tinst_xk) : (this_xk | tinst_xk);
duke@435	2937	} else if( !tinst_xk && this_klass->is_subtype_of( tinst_klass ) ) {
duke@435	2938	subtype = this_klass; // Pick subtyping class
duke@435	2939	subtype_exact = this_xk;
duke@435	2940	} else if( !this_xk && tinst_klass->is_subtype_of( this_klass ) ) {
duke@435	2941	subtype = tinst_klass; // Pick subtyping class
duke@435	2942	subtype_exact = tinst_xk;
duke@435	2943	}
duke@435	2944
duke@435	2945	if( subtype ) {
duke@435	2946	if( above_centerline(ptr) ) { // both are up?
duke@435	2947	this_klass = tinst_klass = subtype;
duke@435	2948	this_xk = tinst_xk = subtype_exact;
duke@435	2949	} else if( above_centerline(this ->_ptr) && !above_centerline(tinst->_ptr) ) {
duke@435	2950	this_klass = tinst_klass; // tinst is down; keep down man
duke@435	2951	this_xk = tinst_xk;
duke@435	2952	} else if( above_centerline(tinst->_ptr) && !above_centerline(this ->_ptr) ) {
duke@435	2953	tinst_klass = this_klass; // this is down; keep down man
duke@435	2954	tinst_xk = this_xk;
duke@435	2955	} else {
duke@435	2956	this_xk = subtype_exact; // either they are equal, or we'll do an LCA
duke@435	2957	}
duke@435	2958	}
duke@435	2959
duke@435	2960	// Check for classes now being equal
duke@435	2961	if (tinst_klass->equals(this_klass)) {
duke@435	2962	// If the klasses are equal, the constants may still differ. Fall to
duke@435	2963	// NotNull if they do (neither constant is NULL; that is a special case
duke@435	2964	// handled elsewhere).
duke@435	2965	ciObject* o = NULL; // Assume not constant when done
duke@435	2966	ciObject* this_oop = const_oop();
duke@435	2967	ciObject* tinst_oop = tinst->const_oop();
duke@435	2968	if( ptr == Constant ) {
duke@435	2969	if (this_oop != NULL && tinst_oop != NULL &&
duke@435	2970	this_oop->equals(tinst_oop) )
duke@435	2971	o = this_oop;
duke@435	2972	else if (above_centerline(this ->_ptr))
duke@435	2973	o = tinst_oop;
duke@435	2974	else if (above_centerline(tinst ->_ptr))
duke@435	2975	o = this_oop;
duke@435	2976	else
duke@435	2977	ptr = NotNull;
duke@435	2978	}
duke@435	2979	return make( ptr, this_klass, this_xk, o, off, instance_id );
duke@435	2980	} // Else classes are not equal
duke@435	2981
duke@435	2982	// Since klasses are different, we require a LCA in the Java
duke@435	2983	// class hierarchy - which means we have to fall to at least NotNull.
duke@435	2984	if( ptr == TopPTR || ptr == AnyNull || ptr == Constant )
duke@435	2985	ptr = NotNull;
kvn@682	2986	instance_id = InstanceBot;
duke@435	2987
duke@435	2988	// Now we find the LCA of Java classes
duke@435	2989	ciKlass* k = this_klass->least_common_ancestor(tinst_klass);
kvn@658	2990	return make( ptr, k, false, NULL, off, instance_id );
duke@435	2991	} // End of case InstPtr
duke@435	2992
duke@435	2993	case KlassPtr:
duke@435	2994	return TypeInstPtr::BOTTOM;
duke@435	2995
duke@435	2996	} // End of switch
duke@435	2997	return this; // Return the double constant
duke@435	2998	}
duke@435	2999
duke@435	3000
duke@435	3001	//------------------------java_mirror_type--------------------------------------
duke@435	3002	ciType* TypeInstPtr::java_mirror_type() const {
duke@435	3003	// must be a singleton type
duke@435	3004	if( const_oop() == NULL ) return NULL;
duke@435	3005
duke@435	3006	// must be of type java.lang.Class
duke@435	3007	if( klass() != ciEnv::current()->Class_klass() ) return NULL;
duke@435	3008
duke@435	3009	return const_oop()->as_instance()->java_mirror_type();
duke@435	3010	}
duke@435	3011
duke@435	3012
duke@435	3013	//------------------------------xdual------------------------------------------
duke@435	3014	// Dual: do NOT dual on klasses. This means I do NOT understand the Java
duke@435	3015	// inheritence mechanism.
duke@435	3016	const Type *TypeInstPtr::xdual() const {
kvn@658	3017	return new TypeInstPtr( dual_ptr(), klass(), klass_is_exact(), const_oop(), dual_offset(), dual_instance_id() );
duke@435	3018	}
duke@435	3019
duke@435	3020	//------------------------------eq---------------------------------------------
duke@435	3021	// Structural equality check for Type representations
duke@435	3022	bool TypeInstPtr::eq( const Type *t ) const {
duke@435	3023	const TypeInstPtr *p = t->is_instptr();
duke@435	3024	return
duke@435	3025	klass()->equals(p->klass()) &&
duke@435	3026	TypeOopPtr::eq(p); // Check sub-type stuff
duke@435	3027	}
duke@435	3028
duke@435	3029	//------------------------------hash-------------------------------------------
duke@435	3030	// Type-specific hashing function.
duke@435	3031	int TypeInstPtr::hash(void) const {
duke@435	3032	int hash = klass()->hash() + TypeOopPtr::hash();
duke@435	3033	return hash;
duke@435	3034	}
duke@435	3035
duke@435	3036	//------------------------------dump2------------------------------------------
duke@435	3037	// Dump oop Type
duke@435	3038	#ifndef PRODUCT
duke@435	3039	void TypeInstPtr::dump2( Dict &d, uint depth, outputStream *st ) const {
duke@435	3040	// Print the name of the klass.
duke@435	3041	klass()->print_name_on(st);
duke@435	3042
duke@435	3043	switch( _ptr ) {
duke@435	3044	case Constant:
duke@435	3045	// TO DO: Make CI print the hex address of the underlying oop.
duke@435	3046	if (WizardMode || Verbose) {
duke@435	3047	const_oop()->print_oop(st);
duke@435	3048	}
duke@435	3049	case BotPTR:
duke@435	3050	if (!WizardMode && !Verbose) {
duke@435	3051	if( _klass_is_exact ) st->print(":exact");
duke@435	3052	break;
duke@435	3053	}
duke@435	3054	case TopPTR:
duke@435	3055	case AnyNull:
duke@435	3056	case NotNull:
duke@435	3057	st->print(":%s", ptr_msg[_ptr]);
duke@435	3058	if( _klass_is_exact ) st->print(":exact");
duke@435	3059	break;
duke@435	3060	}
duke@435	3061
duke@435	3062	if( _offset ) { // Dump offset, if any
duke@435	3063	if( _offset == OffsetBot ) st->print("+any");
duke@435	3064	else if( _offset == OffsetTop ) st->print("+unknown");
duke@435	3065	else st->print("+%d", _offset);
duke@435	3066	}
duke@435	3067
duke@435	3068	st->print(" *");
kvn@658	3069	if (_instance_id == InstanceTop)
kvn@658	3070	st->print(",iid=top");
kvn@658	3071	else if (_instance_id != InstanceBot)
duke@435	3072	st->print(",iid=%d",_instance_id);
duke@435	3073	}
duke@435	3074	#endif
duke@435	3075
duke@435	3076	//------------------------------add_offset-------------------------------------
duke@435	3077	const TypePtr *TypeInstPtr::add_offset( int offset ) const {
duke@435	3078	return make( _ptr, klass(), klass_is_exact(), const_oop(), xadd_offset(offset), _instance_id );
duke@435	3079	}
duke@435	3080
duke@435	3081	//=============================================================================
duke@435	3082	// Convenience common pre-built types.
duke@435	3083	const TypeAryPtr *TypeAryPtr::RANGE;
duke@435	3084	const TypeAryPtr *TypeAryPtr::OOPS;
kvn@598	3085	const TypeAryPtr *TypeAryPtr::NARROWOOPS;
duke@435	3086	const TypeAryPtr *TypeAryPtr::BYTES;
duke@435	3087	const TypeAryPtr *TypeAryPtr::SHORTS;
duke@435	3088	const TypeAryPtr *TypeAryPtr::CHARS;
duke@435	3089	const TypeAryPtr *TypeAryPtr::INTS;
duke@435	3090	const TypeAryPtr *TypeAryPtr::LONGS;
duke@435	3091	const TypeAryPtr *TypeAryPtr::FLOATS;
duke@435	3092	const TypeAryPtr *TypeAryPtr::DOUBLES;
duke@435	3093
duke@435	3094	//------------------------------make-------------------------------------------
duke@435	3095	const TypeAryPtr *TypeAryPtr::make( PTR ptr, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id ) {
duke@435	3096	assert(!(k == NULL && ary->_elem->isa_int()),
duke@435	3097	"integral arrays must be pre-equipped with a class");
duke@435	3098	if (!xk) xk = ary->ary_must_be_exact();
kvn@682	3099	assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed");
duke@435	3100	if (!UseExactTypes) xk = (ptr == Constant);
duke@435	3101	return (TypeAryPtr*)(new TypeAryPtr(ptr, NULL, ary, k, xk, offset, instance_id))->hashcons();
duke@435	3102	}
duke@435	3103
duke@435	3104	//------------------------------make-------------------------------------------
duke@435	3105	const TypeAryPtr *TypeAryPtr::make( PTR ptr, ciObject* o, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id ) {
duke@435	3106	assert(!(k == NULL && ary->_elem->isa_int()),
duke@435	3107	"integral arrays must be pre-equipped with a class");
duke@435	3108	assert( (ptr==Constant && o) || (ptr!=Constant && !o), "" );
duke@435	3109	if (!xk) xk = (o != NULL) || ary->ary_must_be_exact();
kvn@682	3110	assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed");
duke@435	3111	if (!UseExactTypes) xk = (ptr == Constant);
duke@435	3112	return (TypeAryPtr*)(new TypeAryPtr(ptr, o, ary, k, xk, offset, instance_id))->hashcons();
duke@435	3113	}
duke@435	3114
duke@435	3115	//------------------------------cast_to_ptr_type-------------------------------
duke@435	3116	const Type *TypeAryPtr::cast_to_ptr_type(PTR ptr) const {
duke@435	3117	if( ptr == _ptr ) return this;
kvn@658	3118	return make(ptr, const_oop(), _ary, klass(), klass_is_exact(), _offset, _instance_id);
duke@435	3119	}
duke@435	3120
duke@435	3121
duke@435	3122	//-----------------------------cast_to_exactness-------------------------------
duke@435	3123	const Type *TypeAryPtr::cast_to_exactness(bool klass_is_exact) const {
duke@435	3124	if( klass_is_exact == _klass_is_exact ) return this;
duke@435	3125	if (!UseExactTypes) return this;
duke@435	3126	if (_ary->ary_must_be_exact()) return this; // cannot clear xk
duke@435	3127	return make(ptr(), const_oop(), _ary, klass(), klass_is_exact, _offset, _instance_id);
duke@435	3128	}
duke@435	3129
kvn@682	3130	//-----------------------------cast_to_instance_id----------------------------
kvn@658	3131	const TypeOopPtr *TypeAryPtr::cast_to_instance_id(int instance_id) const {
kvn@658	3132	if( instance_id == _instance_id ) return this;
kvn@682	3133	return make(_ptr, const_oop(), _ary, klass(), _klass_is_exact, _offset, instance_id);
duke@435	3134	}
duke@435	3135
duke@435	3136	//-----------------------------narrow_size_type-------------------------------
duke@435	3137	// Local cache for arrayOopDesc::max_array_length(etype),
duke@435	3138	// which is kind of slow (and cached elsewhere by other users).
duke@435	3139	static jint max_array_length_cache[T_CONFLICT+1];
duke@435	3140	static jint max_array_length(BasicType etype) {
duke@435	3141	jint& cache = max_array_length_cache[etype];
duke@435	3142	jint res = cache;
duke@435	3143	if (res == 0) {
duke@435	3144	switch (etype) {
coleenp@548	3145	case T_NARROWOOP:
coleenp@548	3146	etype = T_OBJECT;
coleenp@548	3147	break;
duke@435	3148	case T_CONFLICT:
duke@435	3149	case T_ILLEGAL:
duke@435	3150	case T_VOID:
duke@435	3151	etype = T_BYTE; // will produce conservatively high value
duke@435	3152	}
duke@435	3153	cache = res = arrayOopDesc::max_array_length(etype);
duke@435	3154	}
duke@435	3155	return res;
duke@435	3156	}
duke@435	3157
duke@435	3158	// Narrow the given size type to the index range for the given array base type.
duke@435	3159	// Return NULL if the resulting int type becomes empty.
duke@435	3160	const TypeInt* TypeAryPtr::narrow_size_type(const TypeInt* size, BasicType elem) {
duke@435	3161	jint hi = size->_hi;
duke@435	3162	jint lo = size->_lo;
duke@435	3163	jint min_lo = 0;
duke@435	3164	jint max_hi = max_array_length(elem);
duke@435	3165	//if (index_not_size) --max_hi; // type of a valid array index, FTR
duke@435	3166	bool chg = false;
duke@435	3167	if (lo < min_lo) { lo = min_lo; chg = true; }
duke@435	3168	if (hi > max_hi) { hi = max_hi; chg = true; }
duke@435	3169	if (lo > hi)
duke@435	3170	return NULL;
duke@435	3171	if (!chg)
duke@435	3172	return size;
duke@435	3173	return TypeInt::make(lo, hi, Type::WidenMin);
duke@435	3174	}
duke@435	3175
duke@435	3176	//-------------------------------cast_to_size----------------------------------
duke@435	3177	const TypeAryPtr* TypeAryPtr::cast_to_size(const TypeInt* new_size) const {
duke@435	3178	assert(new_size != NULL, "");
duke@435	3179	new_size = narrow_size_type(new_size, elem()->basic_type());
duke@435	3180	if (new_size == NULL) // Negative length arrays will produce weird
duke@435	3181	new_size = TypeInt::ZERO; // intermediate dead fast-path goo
duke@435	3182	if (new_size == size()) return this;
duke@435	3183	const TypeAry* new_ary = TypeAry::make(elem(), new_size);
kvn@658	3184	return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _instance_id);
duke@435	3185	}
duke@435	3186
duke@435	3187
duke@435	3188	//------------------------------eq---------------------------------------------
duke@435	3189	// Structural equality check for Type representations
duke@435	3190	bool TypeAryPtr::eq( const Type *t ) const {
duke@435	3191	const TypeAryPtr *p = t->is_aryptr();
duke@435	3192	return
duke@435	3193	_ary == p->_ary && // Check array
duke@435	3194	TypeOopPtr::eq(p); // Check sub-parts
duke@435	3195	}
duke@435	3196
duke@435	3197	//------------------------------hash-------------------------------------------
duke@435	3198	// Type-specific hashing function.
duke@435	3199	int TypeAryPtr::hash(void) const {
duke@435	3200	return (intptr_t)_ary + TypeOopPtr::hash();
duke@435	3201	}
duke@435	3202
duke@435	3203	//------------------------------meet-------------------------------------------
duke@435	3204	// Compute the MEET of two types. It returns a new Type object.
duke@435	3205	const Type *TypeAryPtr::xmeet( const Type *t ) const {
duke@435	3206	// Perform a fast test for common case; meeting the same types together.
duke@435	3207	if( this == t ) return this; // Meeting same type-rep?
duke@435	3208	// Current "this->_base" is Pointer
duke@435	3209	switch (t->base()) { // switch on original type
duke@435	3210
duke@435	3211	// Mixing ints & oops happens when javac reuses local variables
duke@435	3212	case Int:
duke@435	3213	case Long:
duke@435	3214	case FloatTop:
duke@435	3215	case FloatCon:
duke@435	3216	case FloatBot:
duke@435	3217	case DoubleTop:
duke@435	3218	case DoubleCon:
duke@435	3219	case DoubleBot:
coleenp@548	3220	case NarrowOop:
duke@435	3221	case Bottom: // Ye Olde Default
duke@435	3222	return Type::BOTTOM;
duke@435	3223	case Top:
duke@435	3224	return this;
duke@435	3225
duke@435	3226	default: // All else is a mistake
duke@435	3227	typerr(t);
duke@435	3228
duke@435	3229	case OopPtr: { // Meeting to OopPtrs
duke@435	3230	// Found a OopPtr type vs self-AryPtr type
duke@435	3231	const TypePtr *tp = t->is_oopptr();
duke@435	3232	int offset = meet_offset(tp->offset());
duke@435	3233	PTR ptr = meet_ptr(tp->ptr());
duke@435	3234	switch (tp->ptr()) {
duke@435	3235	case TopPTR:
kvn@658	3236	case AnyNull: {
kvn@658	3237	int instance_id = meet_instance_id(InstanceTop);
kvn@658	3238	return make(ptr, (ptr == Constant ? const_oop() : NULL),
kvn@658	3239	_ary, _klass, _klass_is_exact, offset, instance_id);
kvn@658	3240	}
duke@435	3241	case BotPTR:
duke@435	3242	case NotNull:
duke@435	3243	return TypeOopPtr::make(ptr, offset);
duke@435	3244	default: ShouldNotReachHere();
duke@435	3245	}
duke@435	3246	}
duke@435	3247
duke@435	3248	case AnyPtr: { // Meeting two AnyPtrs
duke@435	3249	// Found an AnyPtr type vs self-AryPtr type
duke@435	3250	const TypePtr *tp = t->is_ptr();
duke@435	3251	int offset = meet_offset(tp->offset());
duke@435	3252	PTR ptr = meet_ptr(tp->ptr());
duke@435	3253	switch (tp->ptr()) {
duke@435	3254	case TopPTR:
duke@435	3255	return this;
duke@435	3256	case BotPTR:
duke@435	3257	case NotNull:
duke@435	3258	return TypePtr::make(AnyPtr, ptr, offset);
duke@435	3259	case Null:
duke@435	3260	if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset);
kvn@658	3261	// else fall through to AnyNull
kvn@658	3262	case AnyNull: {
kvn@658	3263	int instance_id = meet_instance_id(InstanceTop);
kvn@658	3264	return make( ptr, (ptr == Constant ? const_oop() : NULL),
kvn@658	3265	_ary, _klass, _klass_is_exact, offset, instance_id);
kvn@658	3266	}
duke@435	3267	default: ShouldNotReachHere();
duke@435	3268	}
duke@435	3269	}
duke@435	3270
duke@435	3271	case RawPtr: return TypePtr::BOTTOM;
duke@435	3272
duke@435	3273	case AryPtr: { // Meeting 2 references?
duke@435	3274	const TypeAryPtr *tap = t->is_aryptr();
duke@435	3275	int off = meet_offset(tap->offset());
duke@435	3276	const TypeAry *tary = _ary->meet(tap->_ary)->is_ary();
duke@435	3277	PTR ptr = meet_ptr(tap->ptr());
kvn@658	3278	int instance_id = meet_instance_id(tap->instance_id());
duke@435	3279	ciKlass* lazy_klass = NULL;
duke@435	3280	if (tary->_elem->isa_int()) {
duke@435	3281	// Integral array element types have irrelevant lattice relations.
duke@435	3282	// It is the klass that determines array layout, not the element type.
duke@435	3283	if (_klass == NULL)
duke@435	3284	lazy_klass = tap->_klass;
duke@435	3285	else if (tap->_klass == NULL || tap->_klass == _klass) {
duke@435	3286	lazy_klass = _klass;
duke@435	3287	} else {
duke@435	3288	// Something like byte[int+] meets char[int+].
duke@435	3289	// This must fall to bottom, not (int[-128..65535])[int+].
kvn@682	3290	instance_id = InstanceBot;
duke@435	3291	tary = TypeAry::make(Type::BOTTOM, tary->_size);
duke@435	3292	}
duke@435	3293	}
duke@435	3294	bool xk;
duke@435	3295	switch (tap->ptr()) {
duke@435	3296	case AnyNull:
duke@435	3297	case TopPTR:
duke@435	3298	// Compute new klass on demand, do not use tap->_klass
duke@435	3299	xk = (tap->_klass_is_exact | this->_klass_is_exact);
kvn@658	3300	return make( ptr, const_oop(), tary, lazy_klass, xk, off, instance_id );
duke@435	3301	case Constant: {
duke@435	3302	ciObject* o = const_oop();
duke@435	3303	if( _ptr == Constant ) {
duke@435	3304	if( tap->const_oop() != NULL && !o->equals(tap->const_oop()) ) {
duke@435	3305	ptr = NotNull;
duke@435	3306	o = NULL;
kvn@682	3307	instance_id = InstanceBot;
duke@435	3308	}
duke@435	3309	} else if( above_centerline(_ptr) ) {
duke@435	3310	o = tap->const_oop();
duke@435	3311	}
duke@435	3312	xk = true;
kvn@658	3313	return TypeAryPtr::make( ptr, o, tary, tap->_klass, xk, off, instance_id );
duke@435	3314	}
duke@435	3315	case NotNull:
duke@435	3316	case BotPTR:
duke@435	3317	// Compute new klass on demand, do not use tap->_klass
duke@435	3318	if (above_centerline(this->_ptr))
duke@435	3319	xk = tap->_klass_is_exact;
duke@435	3320	else if (above_centerline(tap->_ptr))
duke@435	3321	xk = this->_klass_is_exact;
duke@435	3322	else xk = (tap->_klass_is_exact & this->_klass_is_exact) &&
duke@435	3323	(klass() == tap->klass()); // Only precise for identical arrays
kvn@658	3324	return TypeAryPtr::make( ptr, NULL, tary, lazy_klass, xk, off, instance_id );
duke@435	3325	default: ShouldNotReachHere();
duke@435	3326	}
duke@435	3327	}
duke@435	3328
duke@435	3329	// All arrays inherit from Object class
duke@435	3330	case InstPtr: {
duke@435	3331	const TypeInstPtr *tp = t->is_instptr();
duke@435	3332	int offset = meet_offset(tp->offset());
duke@435	3333	PTR ptr = meet_ptr(tp->ptr());
kvn@658	3334	int instance_id = meet_instance_id(tp->instance_id());
duke@435	3335	switch (ptr) {
duke@435	3336	case TopPTR:
duke@435	3337	case AnyNull: // Fall 'down' to dual of object klass
duke@435	3338	if( tp->klass()->equals(ciEnv::current()->Object_klass()) ) {
kvn@658	3339	return TypeAryPtr::make( ptr, _ary, _klass, _klass_is_exact, offset, instance_id );
duke@435	3340	} else {
duke@435	3341	// cannot subclass, so the meet has to fall badly below the centerline
duke@435	3342	ptr = NotNull;
kvn@658	3343	instance_id = InstanceBot;
kvn@658	3344	return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL,offset, instance_id);
duke@435	3345	}
duke@435	3346	case Constant:
duke@435	3347	case NotNull:
duke@435	3348	case BotPTR: // Fall down to object klass
duke@435	3349	// LCA is object_klass, but if we subclass from the top we can do better
duke@435	3350	if (above_centerline(tp->ptr())) {
duke@435	3351	// If 'tp' is above the centerline and it is Object class
duke@435	3352	// then we can subclass in the Java class heirarchy.
duke@435	3353	if( tp->klass()->equals(ciEnv::current()->Object_klass()) ) {
duke@435	3354	// that is, my array type is a subtype of 'tp' klass
kvn@658	3355	return make( ptr, _ary, _klass, _klass_is_exact, offset, instance_id );
duke@435	3356	}
duke@435	3357	}
duke@435	3358	// The other case cannot happen, since t cannot be a subtype of an array.
duke@435	3359	// The meet falls down to Object class below centerline.
duke@435	3360	if( ptr == Constant )
duke@435	3361	ptr = NotNull;
kvn@658	3362	instance_id = InstanceBot;
kvn@658	3363	return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL,offset, instance_id);
duke@435	3364	default: typerr(t);
duke@435	3365	}
duke@435	3366	}
duke@435	3367
duke@435	3368	case KlassPtr:
duke@435	3369	return TypeInstPtr::BOTTOM;
duke@435	3370
duke@435	3371	}
duke@435	3372	return this; // Lint noise
duke@435	3373	}
duke@435	3374
duke@435	3375	//------------------------------xdual------------------------------------------
duke@435	3376	// Dual: compute field-by-field dual
duke@435	3377	const Type *TypeAryPtr::xdual() const {
kvn@658	3378	return new TypeAryPtr( dual_ptr(), _const_oop, _ary->dual()->is_ary(),_klass, _klass_is_exact, dual_offset(), dual_instance_id() );
duke@435	3379	}
duke@435	3380
duke@435	3381	//------------------------------dump2------------------------------------------
duke@435	3382	#ifndef PRODUCT
duke@435	3383	void TypeAryPtr::dump2( Dict &d, uint depth, outputStream *st ) const {
duke@435	3384	_ary->dump2(d,depth,st);
duke@435	3385	switch( _ptr ) {
duke@435	3386	case Constant:
duke@435	3387	const_oop()->print(st);
duke@435	3388	break;
duke@435	3389	case BotPTR:
duke@435	3390	if (!WizardMode && !Verbose) {
duke@435	3391	if( _klass_is_exact ) st->print(":exact");
duke@435	3392	break;
duke@435	3393	}
duke@435	3394	case TopPTR:
duke@435	3395	case AnyNull:
duke@435	3396	case NotNull:
duke@435	3397	st->print(":%s", ptr_msg[_ptr]);
duke@435	3398	if( _klass_is_exact ) st->print(":exact");
duke@435	3399	break;
duke@435	3400	}
duke@435	3401
kvn@499	3402	if( _offset != 0 ) {
kvn@499	3403	int header_size = objArrayOopDesc::header_size() * wordSize;
kvn@499	3404	if( _offset == OffsetTop ) st->print("+undefined");
kvn@499	3405	else if( _offset == OffsetBot ) st->print("+any");
kvn@499	3406	else if( _offset < header_size ) st->print("+%d", _offset);
kvn@499	3407	else {
kvn@499	3408	BasicType basic_elem_type = elem()->basic_type();
kvn@499	3409	int array_base = arrayOopDesc::base_offset_in_bytes(basic_elem_type);
kvn@499	3410	int elem_size = type2aelembytes(basic_elem_type);
kvn@499	3411	st->print("[%d]", (_offset - array_base)/elem_size);
kvn@499	3412	}
kvn@499	3413	}
kvn@499	3414	st->print(" *");
kvn@658	3415	if (_instance_id == InstanceTop)
kvn@658	3416	st->print(",iid=top");
kvn@658	3417	else if (_instance_id != InstanceBot)
duke@435	3418	st->print(",iid=%d",_instance_id);
duke@435	3419	}
duke@435	3420	#endif
duke@435	3421
duke@435	3422	bool TypeAryPtr::empty(void) const {
duke@435	3423	if (_ary->empty()) return true;
duke@435	3424	return TypeOopPtr::empty();
duke@435	3425	}
duke@435	3426
duke@435	3427	//------------------------------add_offset-------------------------------------
duke@435	3428	const TypePtr *TypeAryPtr::add_offset( int offset ) const {
duke@435	3429	return make( _ptr, _const_oop, _ary, _klass, _klass_is_exact, xadd_offset(offset), _instance_id );
duke@435	3430	}
duke@435	3431
duke@435	3432
duke@435	3433	//=============================================================================
coleenp@548	3434	const TypeNarrowOop *TypeNarrowOop::BOTTOM;
coleenp@548	3435	const TypeNarrowOop *TypeNarrowOop::NULL_PTR;
coleenp@548	3436
coleenp@548	3437
coleenp@548	3438	const TypeNarrowOop* TypeNarrowOop::make(const TypePtr* type) {
coleenp@548	3439	return (const TypeNarrowOop*)(new TypeNarrowOop(type))->hashcons();
coleenp@548	3440	}
coleenp@548	3441
coleenp@548	3442	//------------------------------hash-------------------------------------------
coleenp@548	3443	// Type-specific hashing function.
coleenp@548	3444	int TypeNarrowOop::hash(void) const {
coleenp@548	3445	return _ooptype->hash() + 7;
coleenp@548	3446	}
coleenp@548	3447
coleenp@548	3448
coleenp@548	3449	bool TypeNarrowOop::eq( const Type *t ) const {
coleenp@548	3450	const TypeNarrowOop* tc = t->isa_narrowoop();
coleenp@548	3451	if (tc != NULL) {
coleenp@548	3452	if (_ooptype->base() != tc->_ooptype->base()) {
coleenp@548	3453	return false;
coleenp@548	3454	}
coleenp@548	3455	return tc->_ooptype->eq(_ooptype);
coleenp@548	3456	}
coleenp@548	3457	return false;
coleenp@548	3458	}
coleenp@548	3459
coleenp@548	3460	bool TypeNarrowOop::singleton(void) const { // TRUE if type is a singleton
coleenp@548	3461	return _ooptype->singleton();
coleenp@548	3462	}
coleenp@548	3463
coleenp@548	3464	bool TypeNarrowOop::empty(void) const {
coleenp@548	3465	return _ooptype->empty();
coleenp@548	3466	}
coleenp@548	3467
coleenp@548	3468	//------------------------------meet-------------------------------------------
coleenp@548	3469	// Compute the MEET of two types. It returns a new Type object.
coleenp@548	3470	const Type *TypeNarrowOop::xmeet( const Type *t ) const {
coleenp@548	3471	// Perform a fast test for common case; meeting the same types together.
coleenp@548	3472	if( this == t ) return this; // Meeting same type-rep?
coleenp@548	3473
coleenp@548	3474
coleenp@548	3475	// Current "this->_base" is OopPtr
coleenp@548	3476	switch (t->base()) { // switch on original type
coleenp@548	3477
coleenp@548	3478	case Int: // Mixing ints & oops happens when javac
coleenp@548	3479	case Long: // reuses local variables
coleenp@548	3480	case FloatTop:
coleenp@548	3481	case FloatCon:
coleenp@548	3482	case FloatBot:
coleenp@548	3483	case DoubleTop:
coleenp@548	3484	case DoubleCon:
coleenp@548	3485	case DoubleBot:
coleenp@548	3486	case Bottom: // Ye Olde Default
coleenp@548	3487	return Type::BOTTOM;
coleenp@548	3488	case Top:
coleenp@548	3489	return this;
coleenp@548	3490
coleenp@548	3491	case NarrowOop: {
kvn@656	3492	const Type* result = _ooptype->xmeet(t->make_ptr());
coleenp@548	3493	if (result->isa_ptr()) {
coleenp@548	3494	return TypeNarrowOop::make(result->is_ptr());
coleenp@548	3495	}
coleenp@548	3496	return result;
coleenp@548	3497	}
coleenp@548	3498
coleenp@548	3499	default: // All else is a mistake
coleenp@548	3500	typerr(t);
coleenp@548	3501
coleenp@548	3502	case RawPtr:
coleenp@548	3503	case AnyPtr:
coleenp@548	3504	case OopPtr:
coleenp@548	3505	case InstPtr:
coleenp@548	3506	case KlassPtr:
coleenp@548	3507	case AryPtr:
coleenp@548	3508	typerr(t);
coleenp@548	3509	return Type::BOTTOM;
coleenp@548	3510
coleenp@548	3511	} // End of switch
coleenp@548	3512	}
coleenp@548	3513
coleenp@548	3514	const Type *TypeNarrowOop::xdual() const { // Compute dual right now.
coleenp@548	3515	const TypePtr* odual = _ooptype->dual()->is_ptr();
coleenp@548	3516	return new TypeNarrowOop(odual);
coleenp@548	3517	}
coleenp@548	3518
coleenp@548	3519	const Type *TypeNarrowOop::filter( const Type *kills ) const {
coleenp@548	3520	if (kills->isa_narrowoop()) {
coleenp@548	3521	const Type* ft =_ooptype->filter(kills->is_narrowoop()->_ooptype);
coleenp@548	3522	if (ft->empty())
coleenp@548	3523	return Type::TOP; // Canonical empty value
coleenp@548	3524	if (ft->isa_ptr()) {
coleenp@548	3525	return make(ft->isa_ptr());
coleenp@548	3526	}
coleenp@548	3527	return ft;
coleenp@548	3528	} else if (kills->isa_ptr()) {
coleenp@548	3529	const Type* ft = _ooptype->join(kills);
coleenp@548	3530	if (ft->empty())
coleenp@548	3531	return Type::TOP; // Canonical empty value
coleenp@548	3532	return ft;
coleenp@548	3533	} else {
coleenp@548	3534	return Type::TOP;
coleenp@548	3535	}
coleenp@548	3536	}
coleenp@548	3537
coleenp@548	3538
coleenp@548	3539	intptr_t TypeNarrowOop::get_con() const {
coleenp@548	3540	return _ooptype->get_con();
coleenp@548	3541	}
coleenp@548	3542
coleenp@548	3543	#ifndef PRODUCT
coleenp@548	3544	void TypeNarrowOop::dump2( Dict & d, uint depth, outputStream *st ) const {
coleenp@548	3545	tty->print("narrowoop: ");
coleenp@548	3546	_ooptype->dump2(d, depth, st);
coleenp@548	3547	}
coleenp@548	3548	#endif
coleenp@548	3549
coleenp@548	3550
coleenp@548	3551	//=============================================================================
duke@435	3552	// Convenience common pre-built types.
duke@435	3553
duke@435	3554	// Not-null object klass or below
duke@435	3555	const TypeKlassPtr *TypeKlassPtr::OBJECT;
duke@435	3556	const TypeKlassPtr *TypeKlassPtr::OBJECT_OR_NULL;
duke@435	3557
duke@435	3558	//------------------------------TypeKlasPtr------------------------------------
duke@435	3559	TypeKlassPtr::TypeKlassPtr( PTR ptr, ciKlass* klass, int offset )
duke@435	3560	: TypeOopPtr(KlassPtr, ptr, klass, (ptr==Constant), (ptr==Constant ? klass : NULL), offset, 0) {
duke@435	3561	}
duke@435	3562
duke@435	3563	//------------------------------make-------------------------------------------
duke@435	3564	// ptr to klass 'k', if Constant, or possibly to a sub-klass if not a Constant
duke@435	3565	const TypeKlassPtr *TypeKlassPtr::make( PTR ptr, ciKlass* k, int offset ) {
duke@435	3566	assert( k != NULL, "Expect a non-NULL klass");
duke@435	3567	assert(k->is_instance_klass() || k->is_array_klass() ||
duke@435	3568	k->is_method_klass(), "Incorrect type of klass oop");
duke@435	3569	TypeKlassPtr *r =
duke@435	3570	(TypeKlassPtr*)(new TypeKlassPtr(ptr, k, offset))->hashcons();
duke@435	3571
duke@435	3572	return r;
duke@435	3573	}
duke@435	3574
duke@435	3575	//------------------------------eq---------------------------------------------
duke@435	3576	// Structural equality check for Type representations
duke@435	3577	bool TypeKlassPtr::eq( const Type *t ) const {
duke@435	3578	const TypeKlassPtr *p = t->is_klassptr();
duke@435	3579	return
duke@435	3580	klass()->equals(p->klass()) &&
duke@435	3581	TypeOopPtr::eq(p);
duke@435	3582	}
duke@435	3583
duke@435	3584	//------------------------------hash-------------------------------------------
duke@435	3585	// Type-specific hashing function.
duke@435	3586	int TypeKlassPtr::hash(void) const {
duke@435	3587	return klass()->hash() + TypeOopPtr::hash();
duke@435	3588	}
duke@435	3589
duke@435	3590
duke@435	3591	//------------------------------klass------------------------------------------
duke@435	3592	// Return the defining klass for this class
duke@435	3593	ciKlass* TypeAryPtr::klass() const {
duke@435	3594	if( _klass ) return _klass; // Return cached value, if possible
duke@435	3595
duke@435	3596	// Oops, need to compute _klass and cache it
duke@435	3597	ciKlass* k_ary = NULL;
duke@435	3598	const TypeInstPtr *tinst;
duke@435	3599	const TypeAryPtr *tary;
coleenp@548	3600	const Type* el = elem();
coleenp@548	3601	if (el->isa_narrowoop()) {
kvn@656	3602	el = el->make_ptr();
coleenp@548	3603	}
coleenp@548	3604
duke@435	3605	// Get element klass
coleenp@548	3606	if ((tinst = el->isa_instptr()) != NULL) {
duke@435	3607	// Compute array klass from element klass
duke@435	3608	k_ary = ciObjArrayKlass::make(tinst->klass());
coleenp@548	3609	} else if ((tary = el->isa_aryptr()) != NULL) {
duke@435	3610	// Compute array klass from element klass
duke@435	3611	ciKlass* k_elem = tary->klass();
duke@435	3612	// If element type is something like bottom[], k_elem will be null.
duke@435	3613	if (k_elem != NULL)
duke@435	3614	k_ary = ciObjArrayKlass::make(k_elem);
coleenp@548	3615	} else if ((el->base() == Type::Top) ||
coleenp@548	3616	(el->base() == Type::Bottom)) {
duke@435	3617	// element type of Bottom occurs from meet of basic type
duke@435	3618	// and object; Top occurs when doing join on Bottom.
duke@435	3619	// Leave k_ary at NULL.
duke@435	3620	} else {
duke@435	3621	// Cannot compute array klass directly from basic type,
duke@435	3622	// since subtypes of TypeInt all have basic type T_INT.
coleenp@548	3623	assert(!el->isa_int(),
duke@435	3624	"integral arrays must be pre-equipped with a class");
duke@435	3625	// Compute array klass directly from basic type
coleenp@548	3626	k_ary = ciTypeArrayKlass::make(el->basic_type());
duke@435	3627	}
duke@435	3628
kvn@598	3629	if( this != TypeAryPtr::OOPS ) {
duke@435	3630	// The _klass field acts as a cache of the underlying
duke@435	3631	// ciKlass for this array type. In order to set the field,
duke@435	3632	// we need to cast away const-ness.
duke@435	3633	//
duke@435	3634	// IMPORTANT NOTE: we *never* set the _klass field for the
duke@435	3635	// type TypeAryPtr::OOPS. This Type is shared between all
duke@435	3636	// active compilations. However, the ciKlass which represents
duke@435	3637	// this Type is *not* shared between compilations, so caching
duke@435	3638	// this value would result in fetching a dangling pointer.
duke@435	3639	//
duke@435	3640	// Recomputing the underlying ciKlass for each request is
duke@435	3641	// a bit less efficient than caching, but calls to
duke@435	3642	// TypeAryPtr::OOPS->klass() are not common enough to matter.
duke@435	3643	((TypeAryPtr*)this)->_klass = k_ary;
kvn@598	3644	if (UseCompressedOops && k_ary != NULL && k_ary->is_obj_array_klass() &&
kvn@598	3645	_offset != 0 && _offset != arrayOopDesc::length_offset_in_bytes()) {
kvn@598	3646	((TypeAryPtr*)this)->_is_ptr_to_narrowoop = true;
kvn@598	3647	}
kvn@598	3648	}
duke@435	3649	return k_ary;
duke@435	3650	}
duke@435	3651
duke@435	3652
duke@435	3653	//------------------------------add_offset-------------------------------------
duke@435	3654	// Access internals of klass object
duke@435	3655	const TypePtr *TypeKlassPtr::add_offset( int offset ) const {
duke@435	3656	return make( _ptr, klass(), xadd_offset(offset) );
duke@435	3657	}
duke@435	3658
duke@435	3659	//------------------------------cast_to_ptr_type-------------------------------
duke@435	3660	const Type *TypeKlassPtr::cast_to_ptr_type(PTR ptr) const {
duke@435	3661	assert(_base == OopPtr, "subclass must override cast_to_ptr_type");
duke@435	3662	if( ptr == _ptr ) return this;
duke@435	3663	return make(ptr, _klass, _offset);
duke@435	3664	}
duke@435	3665
duke@435	3666
duke@435	3667	//-----------------------------cast_to_exactness-------------------------------
duke@435	3668	const Type *TypeKlassPtr::cast_to_exactness(bool klass_is_exact) const {
duke@435	3669	if( klass_is_exact == _klass_is_exact ) return this;
duke@435	3670	if (!UseExactTypes) return this;
duke@435	3671	return make(klass_is_exact ? Constant : NotNull, _klass, _offset);
duke@435	3672	}
duke@435	3673
duke@435	3674
duke@435	3675	//-----------------------------as_instance_type--------------------------------
duke@435	3676	// Corresponding type for an instance of the given class.
duke@435	3677	// It will be NotNull, and exact if and only if the klass type is exact.
duke@435	3678	const TypeOopPtr* TypeKlassPtr::as_instance_type() const {
duke@435	3679	ciKlass* k = klass();
duke@435	3680	bool xk = klass_is_exact();
duke@435	3681	//return TypeInstPtr::make(TypePtr::NotNull, k, xk, NULL, 0);
duke@435	3682	const TypeOopPtr* toop = TypeOopPtr::make_from_klass_raw(k);
duke@435	3683	toop = toop->cast_to_ptr_type(TypePtr::NotNull)->is_oopptr();
duke@435	3684	return toop->cast_to_exactness(xk)->is_oopptr();
duke@435	3685	}
duke@435	3686
duke@435	3687
duke@435	3688	//------------------------------xmeet------------------------------------------
duke@435	3689	// Compute the MEET of two types, return a new Type object.
duke@435	3690	const Type *TypeKlassPtr::xmeet( const Type *t ) const {
duke@435	3691	// Perform a fast test for common case; meeting the same types together.
duke@435	3692	if( this == t ) return this; // Meeting same type-rep?
duke@435	3693
duke@435	3694	// Current "this->_base" is Pointer
duke@435	3695	switch (t->base()) { // switch on original type
duke@435	3696
duke@435	3697	case Int: // Mixing ints & oops happens when javac
duke@435	3698	case Long: // reuses local variables
duke@435	3699	case FloatTop:
duke@435	3700	case FloatCon:
duke@435	3701	case FloatBot:
duke@435	3702	case DoubleTop:
duke@435	3703	case DoubleCon:
duke@435	3704	case DoubleBot:
duke@435	3705	case Bottom: // Ye Olde Default
duke@435	3706	return Type::BOTTOM;
duke@435	3707	case Top:
duke@435	3708	return this;
duke@435	3709
duke@435	3710	default: // All else is a mistake
duke@435	3711	typerr(t);
duke@435	3712
duke@435	3713	case RawPtr: return TypePtr::BOTTOM;
duke@435	3714
duke@435	3715	case OopPtr: { // Meeting to OopPtrs
duke@435	3716	// Found a OopPtr type vs self-KlassPtr type
duke@435	3717	const TypePtr *tp = t->is_oopptr();
duke@435	3718	int offset = meet_offset(tp->offset());
duke@435	3719	PTR ptr = meet_ptr(tp->ptr());
duke@435	3720	switch (tp->ptr()) {
duke@435	3721	case TopPTR:
duke@435	3722	case AnyNull:
duke@435	3723	return make(ptr, klass(), offset);
duke@435	3724	case BotPTR:
duke@435	3725	case NotNull:
duke@435	3726	return TypePtr::make(AnyPtr, ptr, offset);
duke@435	3727	default: typerr(t);
duke@435	3728	}
duke@435	3729	}
duke@435	3730
duke@435	3731	case AnyPtr: { // Meeting to AnyPtrs
duke@435	3732	// Found an AnyPtr type vs self-KlassPtr type
duke@435	3733	const TypePtr *tp = t->is_ptr();
duke@435	3734	int offset = meet_offset(tp->offset());
duke@435	3735	PTR ptr = meet_ptr(tp->ptr());
duke@435	3736	switch (tp->ptr()) {
duke@435	3737	case TopPTR:
duke@435	3738	return this;
duke@435	3739	case Null:
duke@435	3740	if( ptr == Null ) return TypePtr::make( AnyPtr, ptr, offset );
duke@435	3741	case AnyNull:
duke@435	3742	return make( ptr, klass(), offset );
duke@435	3743	case BotPTR:
duke@435	3744	case NotNull:
duke@435	3745	return TypePtr::make(AnyPtr, ptr, offset);
duke@435	3746	default: typerr(t);
duke@435	3747	}
duke@435	3748	}
duke@435	3749
duke@435	3750	case AryPtr: // Meet with AryPtr
duke@435	3751	case InstPtr: // Meet with InstPtr
duke@435	3752	return TypeInstPtr::BOTTOM;
duke@435	3753
duke@435	3754	//
duke@435	3755	// A-top }
duke@435	3756	// / | \ } Tops
duke@435	3757	// B-top A-any C-top }
duke@435	3758	// | / | \ | } Any-nulls
duke@435	3759	// B-any | C-any }
duke@435	3760	// | | |
duke@435	3761	// B-con A-con C-con } constants; not comparable across classes
duke@435	3762	// | | |
duke@435	3763	// B-not | C-not }
duke@435	3764	// | \ | / | } not-nulls
duke@435	3765	// B-bot A-not C-bot }
duke@435	3766	// \ | / } Bottoms
duke@435	3767	// A-bot }
duke@435	3768	//
duke@435	3769
duke@435	3770	case KlassPtr: { // Meet two KlassPtr types
duke@435	3771	const TypeKlassPtr *tkls = t->is_klassptr();
duke@435	3772	int off = meet_offset(tkls->offset());
duke@435	3773	PTR ptr = meet_ptr(tkls->ptr());
duke@435	3774
duke@435	3775	// Check for easy case; klasses are equal (and perhaps not loaded!)
duke@435	3776	// If we have constants, then we created oops so classes are loaded
duke@435	3777	// and we can handle the constants further down. This case handles
duke@435	3778	// not-loaded classes
duke@435	3779	if( ptr != Constant && tkls->klass()->equals(klass()) ) {
duke@435	3780	return make( ptr, klass(), off );
duke@435	3781	}
duke@435	3782
duke@435	3783	// Classes require inspection in the Java klass hierarchy. Must be loaded.
duke@435	3784	ciKlass* tkls_klass = tkls->klass();
duke@435	3785	ciKlass* this_klass = this->klass();
duke@435	3786	assert( tkls_klass->is_loaded(), "This class should have been loaded.");
duke@435	3787	assert( this_klass->is_loaded(), "This class should have been loaded.");
duke@435	3788
duke@435	3789	// If 'this' type is above the centerline and is a superclass of the
duke@435	3790	// other, we can treat 'this' as having the same type as the other.
duke@435	3791	if ((above_centerline(this->ptr())) &&
duke@435	3792	tkls_klass->is_subtype_of(this_klass)) {
duke@435	3793	this_klass = tkls_klass;
duke@435	3794	}
duke@435	3795	// If 'tinst' type is above the centerline and is a superclass of the
duke@435	3796	// other, we can treat 'tinst' as having the same type as the other.
duke@435	3797	if ((above_centerline(tkls->ptr())) &&
duke@435	3798	this_klass->is_subtype_of(tkls_klass)) {
duke@435	3799	tkls_klass = this_klass;
duke@435	3800	}
duke@435	3801
duke@435	3802	// Check for classes now being equal
duke@435	3803	if (tkls_klass->equals(this_klass)) {
duke@435	3804	// If the klasses are equal, the constants may still differ. Fall to
duke@435	3805	// NotNull if they do (neither constant is NULL; that is a special case
duke@435	3806	// handled elsewhere).
duke@435	3807	ciObject* o = NULL; // Assume not constant when done
duke@435	3808	ciObject* this_oop = const_oop();
duke@435	3809	ciObject* tkls_oop = tkls->const_oop();
duke@435	3810	if( ptr == Constant ) {
duke@435	3811	if (this_oop != NULL && tkls_oop != NULL &&
duke@435	3812	this_oop->equals(tkls_oop) )
duke@435	3813	o = this_oop;
duke@435	3814	else if (above_centerline(this->ptr()))
duke@435	3815	o = tkls_oop;
duke@435	3816	else if (above_centerline(tkls->ptr()))
duke@435	3817	o = this_oop;
duke@435	3818	else
duke@435	3819	ptr = NotNull;
duke@435	3820	}
duke@435	3821	return make( ptr, this_klass, off );
duke@435	3822	} // Else classes are not equal
duke@435	3823
duke@435	3824	// Since klasses are different, we require the LCA in the Java
duke@435	3825	// class hierarchy - which means we have to fall to at least NotNull.
duke@435	3826	if( ptr == TopPTR || ptr == AnyNull || ptr == Constant )
duke@435	3827	ptr = NotNull;
duke@435	3828	// Now we find the LCA of Java classes
duke@435	3829	ciKlass* k = this_klass->least_common_ancestor(tkls_klass);
duke@435	3830	return make( ptr, k, off );
duke@435	3831	} // End of case KlassPtr
duke@435	3832
duke@435	3833	} // End of switch
duke@435	3834	return this; // Return the double constant
duke@435	3835	}
duke@435	3836
duke@435	3837	//------------------------------xdual------------------------------------------
duke@435	3838	// Dual: compute field-by-field dual
duke@435	3839	const Type *TypeKlassPtr::xdual() const {
duke@435	3840	return new TypeKlassPtr( dual_ptr(), klass(), dual_offset() );
duke@435	3841	}
duke@435	3842
duke@435	3843	//------------------------------dump2------------------------------------------
duke@435	3844	// Dump Klass Type
duke@435	3845	#ifndef PRODUCT
duke@435	3846	void TypeKlassPtr::dump2( Dict & d, uint depth, outputStream *st ) const {
duke@435	3847	switch( _ptr ) {
duke@435	3848	case Constant:
duke@435	3849	st->print("precise ");
duke@435	3850	case NotNull:
duke@435	3851	{
duke@435	3852	const char *name = klass()->name()->as_utf8();
duke@435	3853	if( name ) {
duke@435	3854	st->print("klass %s: " INTPTR_FORMAT, name, klass());
duke@435	3855	} else {
duke@435	3856	ShouldNotReachHere();
duke@435	3857	}
duke@435	3858	}
duke@435	3859	case BotPTR:
duke@435	3860	if( !WizardMode && !Verbose && !_klass_is_exact ) break;
duke@435	3861	case TopPTR:
duke@435	3862	case AnyNull:
duke@435	3863	st->print(":%s", ptr_msg[_ptr]);
duke@435	3864	if( _klass_is_exact ) st->print(":exact");
duke@435	3865	break;
duke@435	3866	}
duke@435	3867
duke@435	3868	if( _offset ) { // Dump offset, if any
duke@435	3869	if( _offset == OffsetBot ) { st->print("+any"); }
duke@435	3870	else if( _offset == OffsetTop ) { st->print("+unknown"); }
duke@435	3871	else { st->print("+%d", _offset); }
duke@435	3872	}
duke@435	3873
duke@435	3874	st->print(" *");
duke@435	3875	}
duke@435	3876	#endif
duke@435	3877
duke@435	3878
duke@435	3879
duke@435	3880	//=============================================================================
duke@435	3881	// Convenience common pre-built types.
duke@435	3882
duke@435	3883	//------------------------------make-------------------------------------------
duke@435	3884	const TypeFunc *TypeFunc::make( const TypeTuple *domain, const TypeTuple *range ) {
duke@435	3885	return (TypeFunc*)(new TypeFunc(domain,range))->hashcons();
duke@435	3886	}
duke@435	3887
duke@435	3888	//------------------------------make-------------------------------------------
duke@435	3889	const TypeFunc *TypeFunc::make(ciMethod* method) {
duke@435	3890	Compile* C = Compile::current();
duke@435	3891	const TypeFunc* tf = C->last_tf(method); // check cache
duke@435	3892	if (tf != NULL) return tf; // The hit rate here is almost 50%.
duke@435	3893	const TypeTuple *domain;
duke@435	3894	if (method->flags().is_static()) {
duke@435	3895	domain = TypeTuple::make_domain(NULL, method->signature());
duke@435	3896	} else {
duke@435	3897	domain = TypeTuple::make_domain(method->holder(), method->signature());
duke@435	3898	}
duke@435	3899	const TypeTuple *range = TypeTuple::make_range(method->signature());
duke@435	3900	tf = TypeFunc::make(domain, range);
duke@435	3901	C->set_last_tf(method, tf); // fill cache
duke@435	3902	return tf;
duke@435	3903	}
duke@435	3904
duke@435	3905	//------------------------------meet-------------------------------------------
duke@435	3906	// Compute the MEET of two types. It returns a new Type object.
duke@435	3907	const Type *TypeFunc::xmeet( const Type *t ) const {
duke@435	3908	// Perform a fast test for common case; meeting the same types together.
duke@435	3909	if( this == t ) return this; // Meeting same type-rep?
duke@435	3910
duke@435	3911	// Current "this->_base" is Func
duke@435	3912	switch (t->base()) { // switch on original type
duke@435	3913
duke@435	3914	case Bottom: // Ye Olde Default
duke@435	3915	return t;
duke@435	3916
duke@435	3917	default: // All else is a mistake
duke@435	3918	typerr(t);
duke@435	3919
duke@435	3920	case Top:
duke@435	3921	break;
duke@435	3922	}
duke@435	3923	return this; // Return the double constant
duke@435	3924	}
duke@435	3925
duke@435	3926	//------------------------------xdual------------------------------------------
duke@435	3927	// Dual: compute field-by-field dual
duke@435	3928	const Type *TypeFunc::xdual() const {
duke@435	3929	return this;
duke@435	3930	}
duke@435	3931
duke@435	3932	//------------------------------eq---------------------------------------------
duke@435	3933	// Structural equality check for Type representations
duke@435	3934	bool TypeFunc::eq( const Type *t ) const {
duke@435	3935	const TypeFunc *a = (const TypeFunc*)t;
duke@435	3936	return _domain == a->_domain &&
duke@435	3937	_range == a->_range;
duke@435	3938	}
duke@435	3939
duke@435	3940	//------------------------------hash-------------------------------------------
duke@435	3941	// Type-specific hashing function.
duke@435	3942	int TypeFunc::hash(void) const {
duke@435	3943	return (intptr_t)_domain + (intptr_t)_range;
duke@435	3944	}
duke@435	3945
duke@435	3946	//------------------------------dump2------------------------------------------
duke@435	3947	// Dump Function Type
duke@435	3948	#ifndef PRODUCT
duke@435	3949	void TypeFunc::dump2( Dict &d, uint depth, outputStream *st ) const {
duke@435	3950	if( _range->_cnt <= Parms )
duke@435	3951	st->print("void");
duke@435	3952	else {
duke@435	3953	uint i;
duke@435	3954	for (i = Parms; i < _range->_cnt-1; i++) {
duke@435	3955	_range->field_at(i)->dump2(d,depth,st);
duke@435	3956	st->print("/");
duke@435	3957	}
duke@435	3958	_range->field_at(i)->dump2(d,depth,st);
duke@435	3959	}
duke@435	3960	st->print(" ");
duke@435	3961	st->print("( ");
duke@435	3962	if( !depth || d[this] ) { // Check for recursive dump
duke@435	3963	st->print("...)");
duke@435	3964	return;
duke@435	3965	}
duke@435	3966	d.Insert((void*)this,(void*)this); // Stop recursion
duke@435	3967	if (Parms < _domain->_cnt)
duke@435	3968	_domain->field_at(Parms)->dump2(d,depth-1,st);
duke@435	3969	for (uint i = Parms+1; i < _domain->_cnt; i++) {
duke@435	3970	st->print(", ");
duke@435	3971	_domain->field_at(i)->dump2(d,depth-1,st);
duke@435	3972	}
duke@435	3973	st->print(" )");
duke@435	3974	}
duke@435	3975
duke@435	3976	//------------------------------print_flattened--------------------------------
duke@435	3977	// Print a 'flattened' signature
duke@435	3978	static const char * const flat_type_msg[Type::lastype] = {
coleenp@548	3979	"bad","control","top","int","long","_", "narrowoop",
duke@435	3980	"tuple:", "array:",
duke@435	3981	"ptr", "rawptr", "ptr", "ptr", "ptr", "ptr",
duke@435	3982	"func", "abIO", "return_address", "mem",
duke@435	3983	"float_top", "ftcon:", "flt",
duke@435	3984	"double_top", "dblcon:", "dbl",
duke@435	3985	"bottom"
duke@435	3986	};
duke@435	3987
duke@435	3988	void TypeFunc::print_flattened() const {
duke@435	3989	if( _range->_cnt <= Parms )
duke@435	3990	tty->print("void");
duke@435	3991	else {
duke@435	3992	uint i;
duke@435	3993	for (i = Parms; i < _range->_cnt-1; i++)
duke@435	3994	tty->print("%s/",flat_type_msg[_range->field_at(i)->base()]);
duke@435	3995	tty->print("%s",flat_type_msg[_range->field_at(i)->base()]);
duke@435	3996	}
duke@435	3997	tty->print(" ( ");
duke@435	3998	if (Parms < _domain->_cnt)
duke@435	3999	tty->print("%s",flat_type_msg[_domain->field_at(Parms)->base()]);
duke@435	4000	for (uint i = Parms+1; i < _domain->_cnt; i++)
duke@435	4001	tty->print(", %s",flat_type_msg[_domain->field_at(i)->base()]);
duke@435	4002	tty->print(" )");
duke@435	4003	}
duke@435	4004	#endif
duke@435	4005
duke@435	4006	//------------------------------singleton--------------------------------------
duke@435	4007	// TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
duke@435	4008	// constants (Ldi nodes). Singletons are integer, float or double constants
duke@435	4009	// or a single symbol.
duke@435	4010	bool TypeFunc::singleton(void) const {
duke@435	4011	return false; // Never a singleton
duke@435	4012	}
duke@435	4013
duke@435	4014	bool TypeFunc::empty(void) const {
duke@435	4015	return false; // Never empty
duke@435	4016	}
duke@435	4017
duke@435	4018
duke@435	4019	BasicType TypeFunc::return_type() const{
duke@435	4020	if (range()->cnt() == TypeFunc::Parms) {
duke@435	4021	return T_VOID;
duke@435	4022	}
duke@435	4023	return range()->field_at(TypeFunc::Parms)->basic_type();
duke@435	4024	}