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src/share/vm/opto/subnode.cpp@d1605aabd0a1 (annotated)

src/share/vm/opto/subnode.cpp

Wed, 02 Jul 2008 12:55:16 -0700

author

xdono

date

Wed, 02 Jul 2008 12:55:16 -0700

changeset 631

d1605aabd0a1

parent 548

ba764ed4b6f2

child 670

9c2ecc2ffb12

permissions

-rw-r--r--

6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell

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/_subnode.cpp.incl"
duke@435	31	#include "math.h"
duke@435	32
duke@435	33	//=============================================================================
duke@435	34	//------------------------------Identity---------------------------------------
duke@435	35	// If right input is a constant 0, return the left input.
duke@435	36	Node *SubNode::Identity( PhaseTransform *phase ) {
duke@435	37	assert(in(1) != this, "Must already have called Value");
duke@435	38	assert(in(2) != this, "Must already have called Value");
duke@435	39
duke@435	40	// Remove double negation
duke@435	41	const Type *zero = add_id();
duke@435	42	if( phase->type( in(1) )->higher_equal( zero ) &&
duke@435	43	in(2)->Opcode() == Opcode() &&
duke@435	44	phase->type( in(2)->in(1) )->higher_equal( zero ) ) {
duke@435	45	return in(2)->in(2);
duke@435	46	}
duke@435	47
duke@435	48	// Convert "(X+Y) - Y" into X
duke@435	49	if( in(1)->Opcode() == Op_AddI ) {
duke@435	50	if( phase->eqv(in(1)->in(2),in(2)) )
duke@435	51	return in(1)->in(1);
duke@435	52	// Also catch: "(X + Opaque2(Y)) - Y". In this case, 'Y' is a loop-varying
duke@435	53	// trip counter and X is likely to be loop-invariant (that's how O2 Nodes
duke@435	54	// are originally used, although the optimizer sometimes jiggers things).
duke@435	55	// This folding through an O2 removes a loop-exit use of a loop-varying
duke@435	56	// value and generally lowers register pressure in and around the loop.
duke@435	57	if( in(1)->in(2)->Opcode() == Op_Opaque2 &&
duke@435	58	phase->eqv(in(1)->in(2)->in(1),in(2)) )
duke@435	59	return in(1)->in(1);
duke@435	60	}
duke@435	61
duke@435	62	return ( phase->type( in(2) )->higher_equal( zero ) ) ? in(1) : this;
duke@435	63	}
duke@435	64
duke@435	65	//------------------------------Value------------------------------------------
duke@435	66	// A subtract node differences it's two inputs.
duke@435	67	const Type *SubNode::Value( PhaseTransform *phase ) const {
duke@435	68	const Node* in1 = in(1);
duke@435	69	const Node* in2 = in(2);
duke@435	70	// Either input is TOP ==> the result is TOP
duke@435	71	const Type* t1 = (in1 == this) ? Type::TOP : phase->type(in1);
duke@435	72	if( t1 == Type::TOP ) return Type::TOP;
duke@435	73	const Type* t2 = (in2 == this) ? Type::TOP : phase->type(in2);
duke@435	74	if( t2 == Type::TOP ) return Type::TOP;
duke@435	75
duke@435	76	// Not correct for SubFnode and AddFNode (must check for infinity)
duke@435	77	// Equal? Subtract is zero
duke@435	78	if (phase->eqv_uncast(in1, in2)) return add_id();
duke@435	79
duke@435	80	// Either input is BOTTOM ==> the result is the local BOTTOM
duke@435	81	if( t1 == Type::BOTTOM || t2 == Type::BOTTOM )
duke@435	82	return bottom_type();
duke@435	83
duke@435	84	return sub(t1,t2); // Local flavor of type subtraction
duke@435	85
duke@435	86	}
duke@435	87
duke@435	88	//=============================================================================
duke@435	89
duke@435	90	//------------------------------Helper function--------------------------------
duke@435	91	static bool ok_to_convert(Node* inc, Node* iv) {
duke@435	92	// Do not collapse (x+c0)-y if "+" is a loop increment, because the
duke@435	93	// "-" is loop invariant and collapsing extends the live-range of "x"
duke@435	94	// to overlap with the "+", forcing another register to be used in
duke@435	95	// the loop.
duke@435	96	// This test will be clearer with '&&' (apply DeMorgan's rule)
duke@435	97	// but I like the early cutouts that happen here.
duke@435	98	const PhiNode *phi;
duke@435	99	if( ( !inc->in(1)->is_Phi() ||
duke@435	100	!(phi=inc->in(1)->as_Phi()) ||
duke@435	101	phi->is_copy() ||
duke@435	102	!phi->region()->is_CountedLoop() ||
duke@435	103	inc != phi->region()->as_CountedLoop()->incr() )
duke@435	104	&&
duke@435	105	// Do not collapse (x+c0)-iv if "iv" is a loop induction variable,
duke@435	106	// because "x" maybe invariant.
duke@435	107	( !iv->is_loop_iv() )
duke@435	108	) {
duke@435	109	return true;
duke@435	110	} else {
duke@435	111	return false;
duke@435	112	}
duke@435	113	}
duke@435	114	//------------------------------Ideal------------------------------------------
duke@435	115	Node *SubINode::Ideal(PhaseGVN *phase, bool can_reshape){
duke@435	116	Node *in1 = in(1);
duke@435	117	Node *in2 = in(2);
duke@435	118	uint op1 = in1->Opcode();
duke@435	119	uint op2 = in2->Opcode();
duke@435	120
duke@435	121	#ifdef ASSERT
duke@435	122	// Check for dead loop
duke@435	123	if( phase->eqv( in1, this ) || phase->eqv( in2, this ) ||
duke@435	124	( op1 == Op_AddI || op1 == Op_SubI ) &&
duke@435	125	( phase->eqv( in1->in(1), this ) || phase->eqv( in1->in(2), this ) ||
duke@435	126	phase->eqv( in1->in(1), in1 ) || phase->eqv( in1->in(2), in1 ) ) )
duke@435	127	assert(false, "dead loop in SubINode::Ideal");
duke@435	128	#endif
duke@435	129
duke@435	130	const Type *t2 = phase->type( in2 );
duke@435	131	if( t2 == Type::TOP ) return NULL;
duke@435	132	// Convert "x-c0" into "x+ -c0".
duke@435	133	if( t2->base() == Type::Int ){ // Might be bottom or top...
duke@435	134	const TypeInt *i = t2->is_int();
duke@435	135	if( i->is_con() )
duke@435	136	return new (phase->C, 3) AddINode(in1, phase->intcon(-i->get_con()));
duke@435	137	}
duke@435	138
duke@435	139	// Convert "(x+c0) - y" into (x-y) + c0"
duke@435	140	// Do not collapse (x+c0)-y if "+" is a loop increment or
duke@435	141	// if "y" is a loop induction variable.
duke@435	142	if( op1 == Op_AddI && ok_to_convert(in1, in2) ) {
duke@435	143	const Type *tadd = phase->type( in1->in(2) );
duke@435	144	if( tadd->singleton() && tadd != Type::TOP ) {
duke@435	145	Node *sub2 = phase->transform( new (phase->C, 3) SubINode( in1->in(1), in2 ));
duke@435	146	return new (phase->C, 3) AddINode( sub2, in1->in(2) );
duke@435	147	}
duke@435	148	}
duke@435	149
duke@435	150
duke@435	151	// Convert "x - (y+c0)" into "(x-y) - c0"
duke@435	152	// Need the same check as in above optimization but reversed.
duke@435	153	if (op2 == Op_AddI && ok_to_convert(in2, in1)) {
duke@435	154	Node* in21 = in2->in(1);
duke@435	155	Node* in22 = in2->in(2);
duke@435	156	const TypeInt* tcon = phase->type(in22)->isa_int();
duke@435	157	if (tcon != NULL && tcon->is_con()) {
duke@435	158	Node* sub2 = phase->transform( new (phase->C, 3) SubINode(in1, in21) );
duke@435	159	Node* neg_c0 = phase->intcon(- tcon->get_con());
duke@435	160	return new (phase->C, 3) AddINode(sub2, neg_c0);
duke@435	161	}
duke@435	162	}
duke@435	163
duke@435	164	const Type *t1 = phase->type( in1 );
duke@435	165	if( t1 == Type::TOP ) return NULL;
duke@435	166
duke@435	167	#ifdef ASSERT
duke@435	168	// Check for dead loop
duke@435	169	if( ( op2 == Op_AddI || op2 == Op_SubI ) &&
duke@435	170	( phase->eqv( in2->in(1), this ) || phase->eqv( in2->in(2), this ) ||
duke@435	171	phase->eqv( in2->in(1), in2 ) || phase->eqv( in2->in(2), in2 ) ) )
duke@435	172	assert(false, "dead loop in SubINode::Ideal");
duke@435	173	#endif
duke@435	174
duke@435	175	// Convert "x - (x+y)" into "-y"
duke@435	176	if( op2 == Op_AddI &&
duke@435	177	phase->eqv( in1, in2->in(1) ) )
duke@435	178	return new (phase->C, 3) SubINode( phase->intcon(0),in2->in(2));
duke@435	179	// Convert "(x-y) - x" into "-y"
duke@435	180	if( op1 == Op_SubI &&
duke@435	181	phase->eqv( in1->in(1), in2 ) )
duke@435	182	return new (phase->C, 3) SubINode( phase->intcon(0),in1->in(2));
duke@435	183	// Convert "x - (y+x)" into "-y"
duke@435	184	if( op2 == Op_AddI &&
duke@435	185	phase->eqv( in1, in2->in(2) ) )
duke@435	186	return new (phase->C, 3) SubINode( phase->intcon(0),in2->in(1));
duke@435	187
duke@435	188	// Convert "0 - (x-y)" into "y-x"
duke@435	189	if( t1 == TypeInt::ZERO && op2 == Op_SubI )
duke@435	190	return new (phase->C, 3) SubINode( in2->in(2), in2->in(1) );
duke@435	191
duke@435	192	// Convert "0 - (x+con)" into "-con-x"
duke@435	193	jint con;
duke@435	194	if( t1 == TypeInt::ZERO && op2 == Op_AddI &&
duke@435	195	(con = in2->in(2)->find_int_con(0)) != 0 )
duke@435	196	return new (phase->C, 3) SubINode( phase->intcon(-con), in2->in(1) );
duke@435	197
duke@435	198	// Convert "(X+A) - (X+B)" into "A - B"
duke@435	199	if( op1 == Op_AddI && op2 == Op_AddI && in1->in(1) == in2->in(1) )
duke@435	200	return new (phase->C, 3) SubINode( in1->in(2), in2->in(2) );
duke@435	201
duke@435	202	// Convert "(A+X) - (B+X)" into "A - B"
duke@435	203	if( op1 == Op_AddI && op2 == Op_AddI && in1->in(2) == in2->in(2) )
duke@435	204	return new (phase->C, 3) SubINode( in1->in(1), in2->in(1) );
duke@435	205
duke@435	206	// Convert "A-(B-C)" into (A+C)-B", since add is commutative and generally
duke@435	207	// nicer to optimize than subtract.
duke@435	208	if( op2 == Op_SubI && in2->outcnt() == 1) {
duke@435	209	Node *add1 = phase->transform( new (phase->C, 3) AddINode( in1, in2->in(2) ) );
duke@435	210	return new (phase->C, 3) SubINode( add1, in2->in(1) );
duke@435	211	}
duke@435	212
duke@435	213	return NULL;
duke@435	214	}
duke@435	215
duke@435	216	//------------------------------sub--------------------------------------------
duke@435	217	// A subtract node differences it's two inputs.
duke@435	218	const Type *SubINode::sub( const Type *t1, const Type *t2 ) const {
duke@435	219	const TypeInt *r0 = t1->is_int(); // Handy access
duke@435	220	const TypeInt *r1 = t2->is_int();
duke@435	221	int32 lo = r0->_lo - r1->_hi;
duke@435	222	int32 hi = r0->_hi - r1->_lo;
duke@435	223
duke@435	224	// We next check for 32-bit overflow.
duke@435	225	// If that happens, we just assume all integers are possible.
duke@435	226	if( (((r0->_lo ^ r1->_hi) >= 0) || // lo ends have same signs OR
duke@435	227	((r0->_lo ^ lo) >= 0)) && // lo results have same signs AND
duke@435	228	(((r0->_hi ^ r1->_lo) >= 0) || // hi ends have same signs OR
duke@435	229	((r0->_hi ^ hi) >= 0)) ) // hi results have same signs
duke@435	230	return TypeInt::make(lo,hi,MAX2(r0->_widen,r1->_widen));
duke@435	231	else // Overflow; assume all integers
duke@435	232	return TypeInt::INT;
duke@435	233	}
duke@435	234
duke@435	235	//=============================================================================
duke@435	236	//------------------------------Ideal------------------------------------------
duke@435	237	Node *SubLNode::Ideal(PhaseGVN *phase, bool can_reshape) {
duke@435	238	Node *in1 = in(1);
duke@435	239	Node *in2 = in(2);
duke@435	240	uint op1 = in1->Opcode();
duke@435	241	uint op2 = in2->Opcode();
duke@435	242
duke@435	243	#ifdef ASSERT
duke@435	244	// Check for dead loop
duke@435	245	if( phase->eqv( in1, this ) || phase->eqv( in2, this ) ||
duke@435	246	( op1 == Op_AddL || op1 == Op_SubL ) &&
duke@435	247	( phase->eqv( in1->in(1), this ) || phase->eqv( in1->in(2), this ) ||
duke@435	248	phase->eqv( in1->in(1), in1 ) || phase->eqv( in1->in(2), in1 ) ) )
duke@435	249	assert(false, "dead loop in SubLNode::Ideal");
duke@435	250	#endif
duke@435	251
duke@435	252	if( phase->type( in2 ) == Type::TOP ) return NULL;
duke@435	253	const TypeLong *i = phase->type( in2 )->isa_long();
duke@435	254	// Convert "x-c0" into "x+ -c0".
duke@435	255	if( i && // Might be bottom or top...
duke@435	256	i->is_con() )
duke@435	257	return new (phase->C, 3) AddLNode(in1, phase->longcon(-i->get_con()));
duke@435	258
duke@435	259	// Convert "(x+c0) - y" into (x-y) + c0"
duke@435	260	// Do not collapse (x+c0)-y if "+" is a loop increment or
duke@435	261	// if "y" is a loop induction variable.
duke@435	262	if( op1 == Op_AddL && ok_to_convert(in1, in2) ) {
duke@435	263	Node *in11 = in1->in(1);
duke@435	264	const Type *tadd = phase->type( in1->in(2) );
duke@435	265	if( tadd->singleton() && tadd != Type::TOP ) {
duke@435	266	Node *sub2 = phase->transform( new (phase->C, 3) SubLNode( in11, in2 ));
duke@435	267	return new (phase->C, 3) AddLNode( sub2, in1->in(2) );
duke@435	268	}
duke@435	269	}
duke@435	270
duke@435	271	// Convert "x - (y+c0)" into "(x-y) - c0"
duke@435	272	// Need the same check as in above optimization but reversed.
duke@435	273	if (op2 == Op_AddL && ok_to_convert(in2, in1)) {
duke@435	274	Node* in21 = in2->in(1);
duke@435	275	Node* in22 = in2->in(2);
duke@435	276	const TypeLong* tcon = phase->type(in22)->isa_long();
duke@435	277	if (tcon != NULL && tcon->is_con()) {
duke@435	278	Node* sub2 = phase->transform( new (phase->C, 3) SubLNode(in1, in21) );
duke@435	279	Node* neg_c0 = phase->longcon(- tcon->get_con());
duke@435	280	return new (phase->C, 3) AddLNode(sub2, neg_c0);
duke@435	281	}
duke@435	282	}
duke@435	283
duke@435	284	const Type *t1 = phase->type( in1 );
duke@435	285	if( t1 == Type::TOP ) return NULL;
duke@435	286
duke@435	287	#ifdef ASSERT
duke@435	288	// Check for dead loop
duke@435	289	if( ( op2 == Op_AddL || op2 == Op_SubL ) &&
duke@435	290	( phase->eqv( in2->in(1), this ) || phase->eqv( in2->in(2), this ) ||
duke@435	291	phase->eqv( in2->in(1), in2 ) || phase->eqv( in2->in(2), in2 ) ) )
duke@435	292	assert(false, "dead loop in SubLNode::Ideal");
duke@435	293	#endif
duke@435	294
duke@435	295	// Convert "x - (x+y)" into "-y"
duke@435	296	if( op2 == Op_AddL &&
duke@435	297	phase->eqv( in1, in2->in(1) ) )
duke@435	298	return new (phase->C, 3) SubLNode( phase->makecon(TypeLong::ZERO), in2->in(2));
duke@435	299	// Convert "x - (y+x)" into "-y"
duke@435	300	if( op2 == Op_AddL &&
duke@435	301	phase->eqv( in1, in2->in(2) ) )
duke@435	302	return new (phase->C, 3) SubLNode( phase->makecon(TypeLong::ZERO),in2->in(1));
duke@435	303
duke@435	304	// Convert "0 - (x-y)" into "y-x"
duke@435	305	if( phase->type( in1 ) == TypeLong::ZERO && op2 == Op_SubL )
duke@435	306	return new (phase->C, 3) SubLNode( in2->in(2), in2->in(1) );
duke@435	307
duke@435	308	// Convert "(X+A) - (X+B)" into "A - B"
duke@435	309	if( op1 == Op_AddL && op2 == Op_AddL && in1->in(1) == in2->in(1) )
duke@435	310	return new (phase->C, 3) SubLNode( in1->in(2), in2->in(2) );
duke@435	311
duke@435	312	// Convert "(A+X) - (B+X)" into "A - B"
duke@435	313	if( op1 == Op_AddL && op2 == Op_AddL && in1->in(2) == in2->in(2) )
duke@435	314	return new (phase->C, 3) SubLNode( in1->in(1), in2->in(1) );
duke@435	315
duke@435	316	// Convert "A-(B-C)" into (A+C)-B"
duke@435	317	if( op2 == Op_SubL && in2->outcnt() == 1) {
duke@435	318	Node *add1 = phase->transform( new (phase->C, 3) AddLNode( in1, in2->in(2) ) );
duke@435	319	return new (phase->C, 3) SubLNode( add1, in2->in(1) );
duke@435	320	}
duke@435	321
duke@435	322	return NULL;
duke@435	323	}
duke@435	324
duke@435	325	//------------------------------sub--------------------------------------------
duke@435	326	// A subtract node differences it's two inputs.
duke@435	327	const Type *SubLNode::sub( const Type *t1, const Type *t2 ) const {
duke@435	328	const TypeLong *r0 = t1->is_long(); // Handy access
duke@435	329	const TypeLong *r1 = t2->is_long();
duke@435	330	jlong lo = r0->_lo - r1->_hi;
duke@435	331	jlong hi = r0->_hi - r1->_lo;
duke@435	332
duke@435	333	// We next check for 32-bit overflow.
duke@435	334	// If that happens, we just assume all integers are possible.
duke@435	335	if( (((r0->_lo ^ r1->_hi) >= 0) || // lo ends have same signs OR
duke@435	336	((r0->_lo ^ lo) >= 0)) && // lo results have same signs AND
duke@435	337	(((r0->_hi ^ r1->_lo) >= 0) || // hi ends have same signs OR
duke@435	338	((r0->_hi ^ hi) >= 0)) ) // hi results have same signs
duke@435	339	return TypeLong::make(lo,hi,MAX2(r0->_widen,r1->_widen));
duke@435	340	else // Overflow; assume all integers
duke@435	341	return TypeLong::LONG;
duke@435	342	}
duke@435	343
duke@435	344	//=============================================================================
duke@435	345	//------------------------------Value------------------------------------------
duke@435	346	// A subtract node differences its two inputs.
duke@435	347	const Type *SubFPNode::Value( PhaseTransform *phase ) const {
duke@435	348	const Node* in1 = in(1);
duke@435	349	const Node* in2 = in(2);
duke@435	350	// Either input is TOP ==> the result is TOP
duke@435	351	const Type* t1 = (in1 == this) ? Type::TOP : phase->type(in1);
duke@435	352	if( t1 == Type::TOP ) return Type::TOP;
duke@435	353	const Type* t2 = (in2 == this) ? Type::TOP : phase->type(in2);
duke@435	354	if( t2 == Type::TOP ) return Type::TOP;
duke@435	355
duke@435	356	// if both operands are infinity of same sign, the result is NaN; do
duke@435	357	// not replace with zero
duke@435	358	if( (t1->is_finite() && t2->is_finite()) ) {
duke@435	359	if( phase->eqv(in1, in2) ) return add_id();
duke@435	360	}
duke@435	361
duke@435	362	// Either input is BOTTOM ==> the result is the local BOTTOM
duke@435	363	const Type *bot = bottom_type();
duke@435	364	if( (t1 == bot) || (t2 == bot) ||
duke@435	365	(t1 == Type::BOTTOM) || (t2 == Type::BOTTOM) )
duke@435	366	return bot;
duke@435	367
duke@435	368	return sub(t1,t2); // Local flavor of type subtraction
duke@435	369	}
duke@435	370
duke@435	371
duke@435	372	//=============================================================================
duke@435	373	//------------------------------Ideal------------------------------------------
duke@435	374	Node *SubFNode::Ideal(PhaseGVN *phase, bool can_reshape) {
duke@435	375	const Type *t2 = phase->type( in(2) );
duke@435	376	// Convert "x-c0" into "x+ -c0".
duke@435	377	if( t2->base() == Type::FloatCon ) { // Might be bottom or top...
duke@435	378	// return new (phase->C, 3) AddFNode(in(1), phase->makecon( TypeF::make(-t2->getf()) ) );
duke@435	379	}
duke@435	380
duke@435	381	// Not associative because of boundary conditions (infinity)
duke@435	382	if( IdealizedNumerics && !phase->C->method()->is_strict() ) {
duke@435	383	// Convert "x - (x+y)" into "-y"
duke@435	384	if( in(2)->is_Add() &&
duke@435	385	phase->eqv(in(1),in(2)->in(1) ) )
duke@435	386	return new (phase->C, 3) SubFNode( phase->makecon(TypeF::ZERO),in(2)->in(2));
duke@435	387	}
duke@435	388
duke@435	389	// Cannot replace 0.0-X with -X because a 'fsub' bytecode computes
duke@435	390	// 0.0-0.0 as +0.0, while a 'fneg' bytecode computes -0.0.
duke@435	391	//if( phase->type(in(1)) == TypeF::ZERO )
duke@435	392	//return new (phase->C, 2) NegFNode(in(2));
duke@435	393
duke@435	394	return NULL;
duke@435	395	}
duke@435	396
duke@435	397	//------------------------------sub--------------------------------------------
duke@435	398	// A subtract node differences its two inputs.
duke@435	399	const Type *SubFNode::sub( const Type *t1, const Type *t2 ) const {
duke@435	400	// no folding if one of operands is infinity or NaN, do not do constant folding
duke@435	401	if( g_isfinite(t1->getf()) && g_isfinite(t2->getf()) ) {
duke@435	402	return TypeF::make( t1->getf() - t2->getf() );
duke@435	403	}
duke@435	404	else if( g_isnan(t1->getf()) ) {
duke@435	405	return t1;
duke@435	406	}
duke@435	407	else if( g_isnan(t2->getf()) ) {
duke@435	408	return t2;
duke@435	409	}
duke@435	410	else {
duke@435	411	return Type::FLOAT;
duke@435	412	}
duke@435	413	}
duke@435	414
duke@435	415	//=============================================================================
duke@435	416	//------------------------------Ideal------------------------------------------
duke@435	417	Node *SubDNode::Ideal(PhaseGVN *phase, bool can_reshape){
duke@435	418	const Type *t2 = phase->type( in(2) );
duke@435	419	// Convert "x-c0" into "x+ -c0".
duke@435	420	if( t2->base() == Type::DoubleCon ) { // Might be bottom or top...
duke@435	421	// return new (phase->C, 3) AddDNode(in(1), phase->makecon( TypeD::make(-t2->getd()) ) );
duke@435	422	}
duke@435	423
duke@435	424	// Not associative because of boundary conditions (infinity)
duke@435	425	if( IdealizedNumerics && !phase->C->method()->is_strict() ) {
duke@435	426	// Convert "x - (x+y)" into "-y"
duke@435	427	if( in(2)->is_Add() &&
duke@435	428	phase->eqv(in(1),in(2)->in(1) ) )
duke@435	429	return new (phase->C, 3) SubDNode( phase->makecon(TypeD::ZERO),in(2)->in(2));
duke@435	430	}
duke@435	431
duke@435	432	// Cannot replace 0.0-X with -X because a 'dsub' bytecode computes
duke@435	433	// 0.0-0.0 as +0.0, while a 'dneg' bytecode computes -0.0.
duke@435	434	//if( phase->type(in(1)) == TypeD::ZERO )
duke@435	435	//return new (phase->C, 2) NegDNode(in(2));
duke@435	436
duke@435	437	return NULL;
duke@435	438	}
duke@435	439
duke@435	440	//------------------------------sub--------------------------------------------
duke@435	441	// A subtract node differences its two inputs.
duke@435	442	const Type *SubDNode::sub( const Type *t1, const Type *t2 ) const {
duke@435	443	// no folding if one of operands is infinity or NaN, do not do constant folding
duke@435	444	if( g_isfinite(t1->getd()) && g_isfinite(t2->getd()) ) {
duke@435	445	return TypeD::make( t1->getd() - t2->getd() );
duke@435	446	}
duke@435	447	else if( g_isnan(t1->getd()) ) {
duke@435	448	return t1;
duke@435	449	}
duke@435	450	else if( g_isnan(t2->getd()) ) {
duke@435	451	return t2;
duke@435	452	}
duke@435	453	else {
duke@435	454	return Type::DOUBLE;
duke@435	455	}
duke@435	456	}
duke@435	457
duke@435	458	//=============================================================================
duke@435	459	//------------------------------Idealize---------------------------------------
duke@435	460	// Unlike SubNodes, compare must still flatten return value to the
duke@435	461	// range -1, 0, 1.
duke@435	462	// And optimizations like those for (X + Y) - X fail if overflow happens.
duke@435	463	Node *CmpNode::Identity( PhaseTransform *phase ) {
duke@435	464	return this;
duke@435	465	}
duke@435	466
duke@435	467	//=============================================================================
duke@435	468	//------------------------------cmp--------------------------------------------
duke@435	469	// Simplify a CmpI (compare 2 integers) node, based on local information.
duke@435	470	// If both inputs are constants, compare them.
duke@435	471	const Type *CmpINode::sub( const Type *t1, const Type *t2 ) const {
duke@435	472	const TypeInt *r0 = t1->is_int(); // Handy access
duke@435	473	const TypeInt *r1 = t2->is_int();
duke@435	474
duke@435	475	if( r0->_hi < r1->_lo ) // Range is always low?
duke@435	476	return TypeInt::CC_LT;
duke@435	477	else if( r0->_lo > r1->_hi ) // Range is always high?
duke@435	478	return TypeInt::CC_GT;
duke@435	479
duke@435	480	else if( r0->is_con() && r1->is_con() ) { // comparing constants?
duke@435	481	assert(r0->get_con() == r1->get_con(), "must be equal");
duke@435	482	return TypeInt::CC_EQ; // Equal results.
duke@435	483	} else if( r0->_hi == r1->_lo ) // Range is never high?
duke@435	484	return TypeInt::CC_LE;
duke@435	485	else if( r0->_lo == r1->_hi ) // Range is never low?
duke@435	486	return TypeInt::CC_GE;
duke@435	487	return TypeInt::CC; // else use worst case results
duke@435	488	}
duke@435	489
duke@435	490	// Simplify a CmpU (compare 2 integers) node, based on local information.
duke@435	491	// If both inputs are constants, compare them.
duke@435	492	const Type *CmpUNode::sub( const Type *t1, const Type *t2 ) const {
duke@435	493	assert(!t1->isa_ptr(), "obsolete usage of CmpU");
duke@435	494
duke@435	495	// comparing two unsigned ints
duke@435	496	const TypeInt *r0 = t1->is_int(); // Handy access
duke@435	497	const TypeInt *r1 = t2->is_int();
duke@435	498
duke@435	499	// Current installed version
duke@435	500	// Compare ranges for non-overlap
duke@435	501	juint lo0 = r0->_lo;
duke@435	502	juint hi0 = r0->_hi;
duke@435	503	juint lo1 = r1->_lo;
duke@435	504	juint hi1 = r1->_hi;
duke@435	505
duke@435	506	// If either one has both negative and positive values,
duke@435	507	// it therefore contains both 0 and -1, and since [0..-1] is the
duke@435	508	// full unsigned range, the type must act as an unsigned bottom.
duke@435	509	bool bot0 = ((jint)(lo0 ^ hi0) < 0);
duke@435	510	bool bot1 = ((jint)(lo1 ^ hi1) < 0);
duke@435	511
duke@435	512	if (bot0 || bot1) {
duke@435	513	// All unsigned values are LE -1 and GE 0.
duke@435	514	if (lo0 == 0 && hi0 == 0) {
duke@435	515	return TypeInt::CC_LE; // 0 <= bot
duke@435	516	} else if (lo1 == 0 && hi1 == 0) {
duke@435	517	return TypeInt::CC_GE; // bot >= 0
duke@435	518	}
duke@435	519	} else {
duke@435	520	// We can use ranges of the form [lo..hi] if signs are the same.
duke@435	521	assert(lo0 <= hi0 && lo1 <= hi1, "unsigned ranges are valid");
duke@435	522	// results are reversed, '-' > '+' for unsigned compare
duke@435	523	if (hi0 < lo1) {
duke@435	524	return TypeInt::CC_LT; // smaller
duke@435	525	} else if (lo0 > hi1) {
duke@435	526	return TypeInt::CC_GT; // greater
duke@435	527	} else if (hi0 == lo1 && lo0 == hi1) {
duke@435	528	return TypeInt::CC_EQ; // Equal results
duke@435	529	} else if (lo0 >= hi1) {
duke@435	530	return TypeInt::CC_GE;
duke@435	531	} else if (hi0 <= lo1) {
duke@435	532	// Check for special case in Hashtable::get. (See below.)
duke@435	533	if ((jint)lo0 >= 0 && (jint)lo1 >= 0 &&
duke@435	534	in(1)->Opcode() == Op_ModI &&
duke@435	535	in(1)->in(2) == in(2) )
duke@435	536	return TypeInt::CC_LT;
duke@435	537	return TypeInt::CC_LE;
duke@435	538	}
duke@435	539	}
duke@435	540	// Check for special case in Hashtable::get - the hash index is
duke@435	541	// mod'ed to the table size so the following range check is useless.
duke@435	542	// Check for: (X Mod Y) CmpU Y, where the mod result and Y both have
duke@435	543	// to be positive.
duke@435	544	// (This is a gross hack, since the sub method never
duke@435	545	// looks at the structure of the node in any other case.)
duke@435	546	if ((jint)lo0 >= 0 && (jint)lo1 >= 0 &&
duke@435	547	in(1)->Opcode() == Op_ModI &&
duke@435	548	in(1)->in(2)->uncast() == in(2)->uncast())
duke@435	549	return TypeInt::CC_LT;
duke@435	550	return TypeInt::CC; // else use worst case results
duke@435	551	}
duke@435	552
duke@435	553	//------------------------------Idealize---------------------------------------
duke@435	554	Node *CmpINode::Ideal( PhaseGVN *phase, bool can_reshape ) {
duke@435	555	if (phase->type(in(2))->higher_equal(TypeInt::ZERO)) {
duke@435	556	switch (in(1)->Opcode()) {
duke@435	557	case Op_CmpL3: // Collapse a CmpL3/CmpI into a CmpL
duke@435	558	return new (phase->C, 3) CmpLNode(in(1)->in(1),in(1)->in(2));
duke@435	559	case Op_CmpF3: // Collapse a CmpF3/CmpI into a CmpF
duke@435	560	return new (phase->C, 3) CmpFNode(in(1)->in(1),in(1)->in(2));
duke@435	561	case Op_CmpD3: // Collapse a CmpD3/CmpI into a CmpD
duke@435	562	return new (phase->C, 3) CmpDNode(in(1)->in(1),in(1)->in(2));
duke@435	563	//case Op_SubI:
duke@435	564	// If (x - y) cannot overflow, then ((x - y) <?> 0)
duke@435	565	// can be turned into (x <?> y).
duke@435	566	// This is handled (with more general cases) by Ideal_sub_algebra.
duke@435	567	}
duke@435	568	}
duke@435	569	return NULL; // No change
duke@435	570	}
duke@435	571
duke@435	572
duke@435	573	//=============================================================================
duke@435	574	// Simplify a CmpL (compare 2 longs ) node, based on local information.
duke@435	575	// If both inputs are constants, compare them.
duke@435	576	const Type *CmpLNode::sub( const Type *t1, const Type *t2 ) const {
duke@435	577	const TypeLong *r0 = t1->is_long(); // Handy access
duke@435	578	const TypeLong *r1 = t2->is_long();
duke@435	579
duke@435	580	if( r0->_hi < r1->_lo ) // Range is always low?
duke@435	581	return TypeInt::CC_LT;
duke@435	582	else if( r0->_lo > r1->_hi ) // Range is always high?
duke@435	583	return TypeInt::CC_GT;
duke@435	584
duke@435	585	else if( r0->is_con() && r1->is_con() ) { // comparing constants?
duke@435	586	assert(r0->get_con() == r1->get_con(), "must be equal");
duke@435	587	return TypeInt::CC_EQ; // Equal results.
duke@435	588	} else if( r0->_hi == r1->_lo ) // Range is never high?
duke@435	589	return TypeInt::CC_LE;
duke@435	590	else if( r0->_lo == r1->_hi ) // Range is never low?
duke@435	591	return TypeInt::CC_GE;
duke@435	592	return TypeInt::CC; // else use worst case results
duke@435	593	}
duke@435	594
duke@435	595	//=============================================================================
duke@435	596	//------------------------------sub--------------------------------------------
duke@435	597	// Simplify an CmpP (compare 2 pointers) node, based on local information.
duke@435	598	// If both inputs are constants, compare them.
duke@435	599	const Type *CmpPNode::sub( const Type *t1, const Type *t2 ) const {
duke@435	600	const TypePtr *r0 = t1->is_ptr(); // Handy access
duke@435	601	const TypePtr *r1 = t2->is_ptr();
duke@435	602
duke@435	603	// Undefined inputs makes for an undefined result
duke@435	604	if( TypePtr::above_centerline(r0->_ptr) ||
duke@435	605	TypePtr::above_centerline(r1->_ptr) )
duke@435	606	return Type::TOP;
duke@435	607
duke@435	608	if (r0 == r1 && r0->singleton()) {
duke@435	609	// Equal pointer constants (klasses, nulls, etc.)
duke@435	610	return TypeInt::CC_EQ;
duke@435	611	}
duke@435	612
duke@435	613	// See if it is 2 unrelated classes.
duke@435	614	const TypeOopPtr* p0 = r0->isa_oopptr();
duke@435	615	const TypeOopPtr* p1 = r1->isa_oopptr();
duke@435	616	if (p0 && p1) {
kvn@468	617	Node* in1 = in(1)->uncast();
kvn@468	618	Node* in2 = in(2)->uncast();
kvn@468	619	AllocateNode* alloc1 = AllocateNode::Ideal_allocation(in1, NULL);
kvn@468	620	AllocateNode* alloc2 = AllocateNode::Ideal_allocation(in2, NULL);
kvn@468	621	if (MemNode::detect_ptr_independence(in1, alloc1, in2, alloc2, NULL)) {
kvn@468	622	return TypeInt::CC_GT; // different pointers
kvn@468	623	}
duke@435	624	ciKlass* klass0 = p0->klass();
duke@435	625	bool xklass0 = p0->klass_is_exact();
duke@435	626	ciKlass* klass1 = p1->klass();
duke@435	627	bool xklass1 = p1->klass_is_exact();
duke@435	628	int kps = (p0->isa_klassptr()?1:0) + (p1->isa_klassptr()?1:0);
duke@435	629	if (klass0 && klass1 &&
duke@435	630	kps != 1 && // both or neither are klass pointers
duke@435	631	!klass0->is_interface() && // do not trust interfaces
duke@435	632	!klass1->is_interface()) {
duke@435	633	// See if neither subclasses the other, or if the class on top
duke@435	634	// is precise. In either of these cases, the compare must fail.
duke@435	635	if (klass0->equals(klass1) || // if types are unequal but klasses are
duke@435	636	!klass0->is_java_klass() || // types not part of Java language?
duke@435	637	!klass1->is_java_klass()) { // types not part of Java language?
duke@435	638	// Do nothing; we know nothing for imprecise types
duke@435	639	} else if (klass0->is_subtype_of(klass1)) {
duke@435	640	// If klass1's type is PRECISE, then we can fail.
duke@435	641	if (xklass1) return TypeInt::CC_GT;
duke@435	642	} else if (klass1->is_subtype_of(klass0)) {
duke@435	643	// If klass0's type is PRECISE, then we can fail.
duke@435	644	if (xklass0) return TypeInt::CC_GT;
duke@435	645	} else { // Neither subtypes the other
duke@435	646	return TypeInt::CC_GT; // ...so always fail
duke@435	647	}
duke@435	648	}
duke@435	649	}
duke@435	650
duke@435	651	// Known constants can be compared exactly
duke@435	652	// Null can be distinguished from any NotNull pointers
duke@435	653	// Unknown inputs makes an unknown result
duke@435	654	if( r0->singleton() ) {
duke@435	655	intptr_t bits0 = r0->get_con();
duke@435	656	if( r1->singleton() )
duke@435	657	return bits0 == r1->get_con() ? TypeInt::CC_EQ : TypeInt::CC_GT;
duke@435	658	return ( r1->_ptr == TypePtr::NotNull && bits0==0 ) ? TypeInt::CC_GT : TypeInt::CC;
duke@435	659	} else if( r1->singleton() ) {
duke@435	660	intptr_t bits1 = r1->get_con();
duke@435	661	return ( r0->_ptr == TypePtr::NotNull && bits1==0 ) ? TypeInt::CC_GT : TypeInt::CC;
duke@435	662	} else
duke@435	663	return TypeInt::CC;
duke@435	664	}
duke@435	665
duke@435	666	//------------------------------Ideal------------------------------------------
duke@435	667	// Check for the case of comparing an unknown klass loaded from the primary
duke@435	668	// super-type array vs a known klass with no subtypes. This amounts to
duke@435	669	// checking to see an unknown klass subtypes a known klass with no subtypes;
duke@435	670	// this only happens on an exact match. We can shorten this test by 1 load.
duke@435	671	Node *CmpPNode::Ideal( PhaseGVN *phase, bool can_reshape ) {
duke@435	672	// Constant pointer on right?
duke@435	673	const TypeKlassPtr* t2 = phase->type(in(2))->isa_klassptr();
duke@435	674	if (t2 == NULL || !t2->klass_is_exact())
duke@435	675	return NULL;
duke@435	676	// Get the constant klass we are comparing to.
duke@435	677	ciKlass* superklass = t2->klass();
duke@435	678
duke@435	679	// Now check for LoadKlass on left.
duke@435	680	Node* ldk1 = in(1);
duke@435	681	if (ldk1->Opcode() != Op_LoadKlass)
duke@435	682	return NULL;
duke@435	683	// Take apart the address of the LoadKlass:
duke@435	684	Node* adr1 = ldk1->in(MemNode::Address);
duke@435	685	intptr_t con2 = 0;
duke@435	686	Node* ldk2 = AddPNode::Ideal_base_and_offset(adr1, phase, con2);
duke@435	687	if (ldk2 == NULL)
duke@435	688	return NULL;
duke@435	689	if (con2 == oopDesc::klass_offset_in_bytes()) {
duke@435	690	// We are inspecting an object's concrete class.
duke@435	691	// Short-circuit the check if the query is abstract.
duke@435	692	if (superklass->is_interface() ||
duke@435	693	superklass->is_abstract()) {
duke@435	694	// Make it come out always false:
duke@435	695	this->set_req(2, phase->makecon(TypePtr::NULL_PTR));
duke@435	696	return this;
duke@435	697	}
duke@435	698	}
duke@435	699
duke@435	700	// Check for a LoadKlass from primary supertype array.
duke@435	701	// Any nested loadklass from loadklass+con must be from the p.s. array.
duke@435	702	if (ldk2->Opcode() != Op_LoadKlass)
duke@435	703	return NULL;
duke@435	704
duke@435	705	// Verify that we understand the situation
duke@435	706	if (con2 != (intptr_t) superklass->super_check_offset())
duke@435	707	return NULL; // Might be element-klass loading from array klass
duke@435	708
duke@435	709	// If 'superklass' has no subklasses and is not an interface, then we are
duke@435	710	// assured that the only input which will pass the type check is
duke@435	711	// 'superklass' itself.
duke@435	712	//
duke@435	713	// We could be more liberal here, and allow the optimization on interfaces
duke@435	714	// which have a single implementor. This would require us to increase the
duke@435	715	// expressiveness of the add_dependency() mechanism.
duke@435	716	// %%% Do this after we fix TypeOopPtr: Deps are expressive enough now.
duke@435	717
duke@435	718	// Object arrays must have their base element have no subtypes
duke@435	719	while (superklass->is_obj_array_klass()) {
duke@435	720	ciType* elem = superklass->as_obj_array_klass()->element_type();
duke@435	721	superklass = elem->as_klass();
duke@435	722	}
duke@435	723	if (superklass->is_instance_klass()) {
duke@435	724	ciInstanceKlass* ik = superklass->as_instance_klass();
duke@435	725	if (ik->has_subklass() || ik->is_interface()) return NULL;
duke@435	726	// Add a dependency if there is a chance that a subclass will be added later.
duke@435	727	if (!ik->is_final()) {
duke@435	728	phase->C->dependencies()->assert_leaf_type(ik);
duke@435	729	}
duke@435	730	}
duke@435	731
duke@435	732	// Bypass the dependent load, and compare directly
duke@435	733	this->set_req(1,ldk2);
duke@435	734
duke@435	735	return this;
duke@435	736	}
duke@435	737
duke@435	738	//=============================================================================
coleenp@548	739	//------------------------------sub--------------------------------------------
coleenp@548	740	// Simplify an CmpN (compare 2 pointers) node, based on local information.
coleenp@548	741	// If both inputs are constants, compare them.
coleenp@548	742	const Type *CmpNNode::sub( const Type *t1, const Type *t2 ) const {
coleenp@548	743	const TypePtr *r0 = t1->is_narrowoop()->make_oopptr(); // Handy access
coleenp@548	744	const TypePtr *r1 = t2->is_narrowoop()->make_oopptr();
coleenp@548	745
coleenp@548	746	// Undefined inputs makes for an undefined result
coleenp@548	747	if( TypePtr::above_centerline(r0->_ptr) ||
coleenp@548	748	TypePtr::above_centerline(r1->_ptr) )
coleenp@548	749	return Type::TOP;
coleenp@548	750
coleenp@548	751	if (r0 == r1 && r0->singleton()) {
coleenp@548	752	// Equal pointer constants (klasses, nulls, etc.)
coleenp@548	753	return TypeInt::CC_EQ;
coleenp@548	754	}
coleenp@548	755
coleenp@548	756	// See if it is 2 unrelated classes.
coleenp@548	757	const TypeOopPtr* p0 = r0->isa_oopptr();
coleenp@548	758	const TypeOopPtr* p1 = r1->isa_oopptr();
coleenp@548	759	if (p0 && p1) {
coleenp@548	760	ciKlass* klass0 = p0->klass();
coleenp@548	761	bool xklass0 = p0->klass_is_exact();
coleenp@548	762	ciKlass* klass1 = p1->klass();
coleenp@548	763	bool xklass1 = p1->klass_is_exact();
coleenp@548	764	int kps = (p0->isa_klassptr()?1:0) + (p1->isa_klassptr()?1:0);
coleenp@548	765	if (klass0 && klass1 &&
coleenp@548	766	kps != 1 && // both or neither are klass pointers
coleenp@548	767	!klass0->is_interface() && // do not trust interfaces
coleenp@548	768	!klass1->is_interface()) {
coleenp@548	769	// See if neither subclasses the other, or if the class on top
coleenp@548	770	// is precise. In either of these cases, the compare must fail.
coleenp@548	771	if (klass0->equals(klass1) || // if types are unequal but klasses are
coleenp@548	772	!klass0->is_java_klass() || // types not part of Java language?
coleenp@548	773	!klass1->is_java_klass()) { // types not part of Java language?
coleenp@548	774	// Do nothing; we know nothing for imprecise types
coleenp@548	775	} else if (klass0->is_subtype_of(klass1)) {
coleenp@548	776	// If klass1's type is PRECISE, then we can fail.
coleenp@548	777	if (xklass1) return TypeInt::CC_GT;
coleenp@548	778	} else if (klass1->is_subtype_of(klass0)) {
coleenp@548	779	// If klass0's type is PRECISE, then we can fail.
coleenp@548	780	if (xklass0) return TypeInt::CC_GT;
coleenp@548	781	} else { // Neither subtypes the other
coleenp@548	782	return TypeInt::CC_GT; // ...so always fail
coleenp@548	783	}
coleenp@548	784	}
coleenp@548	785	}
coleenp@548	786
coleenp@548	787	// Known constants can be compared exactly
coleenp@548	788	// Null can be distinguished from any NotNull pointers
coleenp@548	789	// Unknown inputs makes an unknown result
coleenp@548	790	if( r0->singleton() ) {
coleenp@548	791	intptr_t bits0 = r0->get_con();
coleenp@548	792	if( r1->singleton() )
coleenp@548	793	return bits0 == r1->get_con() ? TypeInt::CC_EQ : TypeInt::CC_GT;
coleenp@548	794	return ( r1->_ptr == TypePtr::NotNull && bits0==0 ) ? TypeInt::CC_GT : TypeInt::CC;
coleenp@548	795	} else if( r1->singleton() ) {
coleenp@548	796	intptr_t bits1 = r1->get_con();
coleenp@548	797	return ( r0->_ptr == TypePtr::NotNull && bits1==0 ) ? TypeInt::CC_GT : TypeInt::CC;
coleenp@548	798	} else
coleenp@548	799	return TypeInt::CC;
coleenp@548	800	}
coleenp@548	801
coleenp@548	802	//------------------------------Ideal------------------------------------------
coleenp@548	803	Node *CmpNNode::Ideal( PhaseGVN *phase, bool can_reshape ) {
coleenp@548	804	return NULL;
coleenp@548	805	}
coleenp@548	806
coleenp@548	807	//=============================================================================
duke@435	808	//------------------------------Value------------------------------------------
duke@435	809	// Simplify an CmpF (compare 2 floats ) node, based on local information.
duke@435	810	// If both inputs are constants, compare them.
duke@435	811	const Type *CmpFNode::Value( PhaseTransform *phase ) const {
duke@435	812	const Node* in1 = in(1);
duke@435	813	const Node* in2 = in(2);
duke@435	814	// Either input is TOP ==> the result is TOP
duke@435	815	const Type* t1 = (in1 == this) ? Type::TOP : phase->type(in1);
duke@435	816	if( t1 == Type::TOP ) return Type::TOP;
duke@435	817	const Type* t2 = (in2 == this) ? Type::TOP : phase->type(in2);
duke@435	818	if( t2 == Type::TOP ) return Type::TOP;
duke@435	819
duke@435	820	// Not constants? Don't know squat - even if they are the same
duke@435	821	// value! If they are NaN's they compare to LT instead of EQ.
duke@435	822	const TypeF *tf1 = t1->isa_float_constant();
duke@435	823	const TypeF *tf2 = t2->isa_float_constant();
duke@435	824	if( !tf1 || !tf2 ) return TypeInt::CC;
duke@435	825
duke@435	826	// This implements the Java bytecode fcmpl, so unordered returns -1.
duke@435	827	if( tf1->is_nan() || tf2->is_nan() )
duke@435	828	return TypeInt::CC_LT;
duke@435	829
duke@435	830	if( tf1->_f < tf2->_f ) return TypeInt::CC_LT;
duke@435	831	if( tf1->_f > tf2->_f ) return TypeInt::CC_GT;
duke@435	832	assert( tf1->_f == tf2->_f, "do not understand FP behavior" );
duke@435	833	return TypeInt::CC_EQ;
duke@435	834	}
duke@435	835
duke@435	836
duke@435	837	//=============================================================================
duke@435	838	//------------------------------Value------------------------------------------
duke@435	839	// Simplify an CmpD (compare 2 doubles ) node, based on local information.
duke@435	840	// If both inputs are constants, compare them.
duke@435	841	const Type *CmpDNode::Value( PhaseTransform *phase ) const {
duke@435	842	const Node* in1 = in(1);
duke@435	843	const Node* in2 = in(2);
duke@435	844	// Either input is TOP ==> the result is TOP
duke@435	845	const Type* t1 = (in1 == this) ? Type::TOP : phase->type(in1);
duke@435	846	if( t1 == Type::TOP ) return Type::TOP;
duke@435	847	const Type* t2 = (in2 == this) ? Type::TOP : phase->type(in2);
duke@435	848	if( t2 == Type::TOP ) return Type::TOP;
duke@435	849
duke@435	850	// Not constants? Don't know squat - even if they are the same
duke@435	851	// value! If they are NaN's they compare to LT instead of EQ.
duke@435	852	const TypeD *td1 = t1->isa_double_constant();
duke@435	853	const TypeD *td2 = t2->isa_double_constant();
duke@435	854	if( !td1 || !td2 ) return TypeInt::CC;
duke@435	855
duke@435	856	// This implements the Java bytecode dcmpl, so unordered returns -1.
duke@435	857	if( td1->is_nan() || td2->is_nan() )
duke@435	858	return TypeInt::CC_LT;
duke@435	859
duke@435	860	if( td1->_d < td2->_d ) return TypeInt::CC_LT;
duke@435	861	if( td1->_d > td2->_d ) return TypeInt::CC_GT;
duke@435	862	assert( td1->_d == td2->_d, "do not understand FP behavior" );
duke@435	863	return TypeInt::CC_EQ;
duke@435	864	}
duke@435	865
duke@435	866	//------------------------------Ideal------------------------------------------
duke@435	867	Node *CmpDNode::Ideal(PhaseGVN *phase, bool can_reshape){
duke@435	868	// Check if we can change this to a CmpF and remove a ConvD2F operation.
duke@435	869	// Change (CMPD (F2D (float)) (ConD value))
duke@435	870	// To (CMPF (float) (ConF value))
duke@435	871	// Valid when 'value' does not lose precision as a float.
duke@435	872	// Benefits: eliminates conversion, does not require 24-bit mode
duke@435	873
duke@435	874	// NaNs prevent commuting operands. This transform works regardless of the
duke@435	875	// order of ConD and ConvF2D inputs by preserving the original order.
duke@435	876	int idx_f2d = 1; // ConvF2D on left side?
duke@435	877	if( in(idx_f2d)->Opcode() != Op_ConvF2D )
duke@435	878	idx_f2d = 2; // No, swap to check for reversed args
duke@435	879	int idx_con = 3-idx_f2d; // Check for the constant on other input
duke@435	880
duke@435	881	if( ConvertCmpD2CmpF &&
duke@435	882	in(idx_f2d)->Opcode() == Op_ConvF2D &&
duke@435	883	in(idx_con)->Opcode() == Op_ConD ) {
duke@435	884	const TypeD *t2 = in(idx_con)->bottom_type()->is_double_constant();
duke@435	885	double t2_value_as_double = t2->_d;
duke@435	886	float t2_value_as_float = (float)t2_value_as_double;
duke@435	887	if( t2_value_as_double == (double)t2_value_as_float ) {
duke@435	888	// Test value can be represented as a float
duke@435	889	// Eliminate the conversion to double and create new comparison
duke@435	890	Node *new_in1 = in(idx_f2d)->in(1);
duke@435	891	Node *new_in2 = phase->makecon( TypeF::make(t2_value_as_float) );
duke@435	892	if( idx_f2d != 1 ) { // Must flip args to match original order
duke@435	893	Node *tmp = new_in1;
duke@435	894	new_in1 = new_in2;
duke@435	895	new_in2 = tmp;
duke@435	896	}
duke@435	897	CmpFNode *new_cmp = (Opcode() == Op_CmpD3)
duke@435	898	? new (phase->C, 3) CmpF3Node( new_in1, new_in2 )
duke@435	899	: new (phase->C, 3) CmpFNode ( new_in1, new_in2 ) ;
duke@435	900	return new_cmp; // Changed to CmpFNode
duke@435	901	}
duke@435	902	// Testing value required the precision of a double
duke@435	903	}
duke@435	904	return NULL; // No change
duke@435	905	}
duke@435	906
duke@435	907
duke@435	908	//=============================================================================
duke@435	909	//------------------------------cc2logical-------------------------------------
duke@435	910	// Convert a condition code type to a logical type
duke@435	911	const Type *BoolTest::cc2logical( const Type *CC ) const {
duke@435	912	if( CC == Type::TOP ) return Type::TOP;
duke@435	913	if( CC->base() != Type::Int ) return TypeInt::BOOL; // Bottom or worse
duke@435	914	const TypeInt *ti = CC->is_int();
duke@435	915	if( ti->is_con() ) { // Only 1 kind of condition codes set?
duke@435	916	// Match low order 2 bits
duke@435	917	int tmp = ((ti->get_con()&3) == (_test&3)) ? 1 : 0;
duke@435	918	if( _test & 4 ) tmp = 1-tmp; // Optionally complement result
duke@435	919	return TypeInt::make(tmp); // Boolean result
duke@435	920	}
duke@435	921
duke@435	922	if( CC == TypeInt::CC_GE ) {
duke@435	923	if( _test == ge ) return TypeInt::ONE;
duke@435	924	if( _test == lt ) return TypeInt::ZERO;
duke@435	925	}
duke@435	926	if( CC == TypeInt::CC_LE ) {
duke@435	927	if( _test == le ) return TypeInt::ONE;
duke@435	928	if( _test == gt ) return TypeInt::ZERO;
duke@435	929	}
duke@435	930
duke@435	931	return TypeInt::BOOL;
duke@435	932	}
duke@435	933
duke@435	934	//------------------------------dump_spec-------------------------------------
duke@435	935	// Print special per-node info
duke@435	936	#ifndef PRODUCT
duke@435	937	void BoolTest::dump_on(outputStream *st) const {
duke@435	938	const char *msg[] = {"eq","gt","??","lt","ne","le","??","ge"};
duke@435	939	st->print(msg[_test]);
duke@435	940	}
duke@435	941	#endif
duke@435	942
duke@435	943	//=============================================================================
duke@435	944	uint BoolNode::hash() const { return (Node::hash() << 3)|(_test._test+1); }
duke@435	945	uint BoolNode::size_of() const { return sizeof(BoolNode); }
duke@435	946
duke@435	947	//------------------------------operator==-------------------------------------
duke@435	948	uint BoolNode::cmp( const Node &n ) const {
duke@435	949	const BoolNode *b = (const BoolNode *)&n; // Cast up
duke@435	950	return (_test._test == b->_test._test);
duke@435	951	}
duke@435	952
duke@435	953	//------------------------------clone_cmp--------------------------------------
duke@435	954	// Clone a compare/bool tree
duke@435	955	static Node *clone_cmp( Node *cmp, Node *cmp1, Node *cmp2, PhaseGVN *gvn, BoolTest::mask test ) {
duke@435	956	Node *ncmp = cmp->clone();
duke@435	957	ncmp->set_req(1,cmp1);
duke@435	958	ncmp->set_req(2,cmp2);
duke@435	959	ncmp = gvn->transform( ncmp );
duke@435	960	return new (gvn->C, 2) BoolNode( ncmp, test );
duke@435	961	}
duke@435	962
duke@435	963	//-------------------------------make_predicate--------------------------------
duke@435	964	Node* BoolNode::make_predicate(Node* test_value, PhaseGVN* phase) {
duke@435	965	if (test_value->is_Con()) return test_value;
duke@435	966	if (test_value->is_Bool()) return test_value;
duke@435	967	Compile* C = phase->C;
duke@435	968	if (test_value->is_CMove() &&
duke@435	969	test_value->in(CMoveNode::Condition)->is_Bool()) {
duke@435	970	BoolNode* bol = test_value->in(CMoveNode::Condition)->as_Bool();
duke@435	971	const Type* ftype = phase->type(test_value->in(CMoveNode::IfFalse));
duke@435	972	const Type* ttype = phase->type(test_value->in(CMoveNode::IfTrue));
duke@435	973	if (ftype == TypeInt::ZERO && !TypeInt::ZERO->higher_equal(ttype)) {
duke@435	974	return bol;
duke@435	975	} else if (ttype == TypeInt::ZERO && !TypeInt::ZERO->higher_equal(ftype)) {
duke@435	976	return phase->transform( bol->negate(phase) );
duke@435	977	}
duke@435	978	// Else fall through. The CMove gets in the way of the test.
duke@435	979	// It should be the case that make_predicate(bol->as_int_value()) == bol.
duke@435	980	}
duke@435	981	Node* cmp = new (C, 3) CmpINode(test_value, phase->intcon(0));
duke@435	982	cmp = phase->transform(cmp);
duke@435	983	Node* bol = new (C, 2) BoolNode(cmp, BoolTest::ne);
duke@435	984	return phase->transform(bol);
duke@435	985	}
duke@435	986
duke@435	987	//--------------------------------as_int_value---------------------------------
duke@435	988	Node* BoolNode::as_int_value(PhaseGVN* phase) {
duke@435	989	// Inverse to make_predicate. The CMove probably boils down to a Conv2B.
duke@435	990	Node* cmov = CMoveNode::make(phase->C, NULL, this,
duke@435	991	phase->intcon(0), phase->intcon(1),
duke@435	992	TypeInt::BOOL);
duke@435	993	return phase->transform(cmov);
duke@435	994	}
duke@435	995
duke@435	996	//----------------------------------negate-------------------------------------
duke@435	997	BoolNode* BoolNode::negate(PhaseGVN* phase) {
duke@435	998	Compile* C = phase->C;
duke@435	999	return new (C, 2) BoolNode(in(1), _test.negate());
duke@435	1000	}
duke@435	1001
duke@435	1002
duke@435	1003	//------------------------------Ideal------------------------------------------
duke@435	1004	Node *BoolNode::Ideal(PhaseGVN *phase, bool can_reshape) {
duke@435	1005	// Change "bool tst (cmp con x)" into "bool ~tst (cmp x con)".
duke@435	1006	// This moves the constant to the right. Helps value-numbering.
duke@435	1007	Node *cmp = in(1);
duke@435	1008	if( !cmp->is_Sub() ) return NULL;
duke@435	1009	int cop = cmp->Opcode();
duke@435	1010	if( cop == Op_FastLock || cop == Op_FastUnlock ) return NULL;
duke@435	1011	Node *cmp1 = cmp->in(1);
duke@435	1012	Node *cmp2 = cmp->in(2);
duke@435	1013	if( !cmp1 ) return NULL;
duke@435	1014
duke@435	1015	// Constant on left?
duke@435	1016	Node *con = cmp1;
duke@435	1017	uint op2 = cmp2->Opcode();
duke@435	1018	// Move constants to the right of compare's to canonicalize.
duke@435	1019	// Do not muck with Opaque1 nodes, as this indicates a loop
duke@435	1020	// guard that cannot change shape.
duke@435	1021	if( con->is_Con() && !cmp2->is_Con() && op2 != Op_Opaque1 &&
duke@435	1022	// Because of NaN's, CmpD and CmpF are not commutative
duke@435	1023	cop != Op_CmpD && cop != Op_CmpF &&
duke@435	1024	// Protect against swapping inputs to a compare when it is used by a
duke@435	1025	// counted loop exit, which requires maintaining the loop-limit as in(2)
duke@435	1026	!is_counted_loop_exit_test() ) {
duke@435	1027	// Ok, commute the constant to the right of the cmp node.
duke@435	1028	// Clone the Node, getting a new Node of the same class
duke@435	1029	cmp = cmp->clone();
duke@435	1030	// Swap inputs to the clone
duke@435	1031	cmp->swap_edges(1, 2);
duke@435	1032	cmp = phase->transform( cmp );
duke@435	1033	return new (phase->C, 2) BoolNode( cmp, _test.commute() );
duke@435	1034	}
duke@435	1035
duke@435	1036	// Change "bool eq/ne (cmp (xor X 1) 0)" into "bool ne/eq (cmp X 0)".
duke@435	1037	// The XOR-1 is an idiom used to flip the sense of a bool. We flip the
duke@435	1038	// test instead.
duke@435	1039	int cmp1_op = cmp1->Opcode();
duke@435	1040	const TypeInt* cmp2_type = phase->type(cmp2)->isa_int();
duke@435	1041	if (cmp2_type == NULL) return NULL;
duke@435	1042	Node* j_xor = cmp1;
duke@435	1043	if( cmp2_type == TypeInt::ZERO &&
duke@435	1044	cmp1_op == Op_XorI &&
duke@435	1045	j_xor->in(1) != j_xor && // An xor of itself is dead
duke@435	1046	phase->type( j_xor->in(2) ) == TypeInt::ONE &&
duke@435	1047	(_test._test == BoolTest::eq ||
duke@435	1048	_test._test == BoolTest::ne) ) {
duke@435	1049	Node *ncmp = phase->transform(new (phase->C, 3) CmpINode(j_xor->in(1),cmp2));
duke@435	1050	return new (phase->C, 2) BoolNode( ncmp, _test.negate() );
duke@435	1051	}
duke@435	1052
duke@435	1053	// Change "bool eq/ne (cmp (Conv2B X) 0)" into "bool eq/ne (cmp X 0)".
duke@435	1054	// This is a standard idiom for branching on a boolean value.
duke@435	1055	Node *c2b = cmp1;
duke@435	1056	if( cmp2_type == TypeInt::ZERO &&
duke@435	1057	cmp1_op == Op_Conv2B &&
duke@435	1058	(_test._test == BoolTest::eq ||
duke@435	1059	_test._test == BoolTest::ne) ) {
duke@435	1060	Node *ncmp = phase->transform(phase->type(c2b->in(1))->isa_int()
duke@435	1061	? (Node*)new (phase->C, 3) CmpINode(c2b->in(1),cmp2)
duke@435	1062	: (Node*)new (phase->C, 3) CmpPNode(c2b->in(1),phase->makecon(TypePtr::NULL_PTR))
duke@435	1063	);
duke@435	1064	return new (phase->C, 2) BoolNode( ncmp, _test._test );
duke@435	1065	}
duke@435	1066
duke@435	1067	// Comparing a SubI against a zero is equal to comparing the SubI
duke@435	1068	// arguments directly. This only works for eq and ne comparisons
duke@435	1069	// due to possible integer overflow.
duke@435	1070	if ((_test._test == BoolTest::eq || _test._test == BoolTest::ne) &&
duke@435	1071	(cop == Op_CmpI) &&
duke@435	1072	(cmp1->Opcode() == Op_SubI) &&
duke@435	1073	( cmp2_type == TypeInt::ZERO ) ) {
duke@435	1074	Node *ncmp = phase->transform( new (phase->C, 3) CmpINode(cmp1->in(1),cmp1->in(2)));
duke@435	1075	return new (phase->C, 2) BoolNode( ncmp, _test._test );
duke@435	1076	}
duke@435	1077
duke@435	1078	// Change (-A vs 0) into (A vs 0) by commuting the test. Disallow in the
duke@435	1079	// most general case because negating 0x80000000 does nothing. Needed for
duke@435	1080	// the CmpF3/SubI/CmpI idiom.
duke@435	1081	if( cop == Op_CmpI &&
duke@435	1082	cmp1->Opcode() == Op_SubI &&
duke@435	1083	cmp2_type == TypeInt::ZERO &&
duke@435	1084	phase->type( cmp1->in(1) ) == TypeInt::ZERO &&
duke@435	1085	phase->type( cmp1->in(2) )->higher_equal(TypeInt::SYMINT) ) {
duke@435	1086	Node *ncmp = phase->transform( new (phase->C, 3) CmpINode(cmp1->in(2),cmp2));
duke@435	1087	return new (phase->C, 2) BoolNode( ncmp, _test.commute() );
duke@435	1088	}
duke@435	1089
duke@435	1090	// The transformation below is not valid for either signed or unsigned
duke@435	1091	// comparisons due to wraparound concerns at MAX_VALUE and MIN_VALUE.
duke@435	1092	// This transformation can be resurrected when we are able to
duke@435	1093	// make inferences about the range of values being subtracted from
duke@435	1094	// (or added to) relative to the wraparound point.
duke@435	1095	//
duke@435	1096	// // Remove +/-1's if possible.
duke@435	1097	// // "X <= Y-1" becomes "X < Y"
duke@435	1098	// // "X+1 <= Y" becomes "X < Y"
duke@435	1099	// // "X < Y+1" becomes "X <= Y"
duke@435	1100	// // "X-1 < Y" becomes "X <= Y"
duke@435	1101	// // Do not this to compares off of the counted-loop-end. These guys are
duke@435	1102	// // checking the trip counter and they want to use the post-incremented
duke@435	1103	// // counter. If they use the PRE-incremented counter, then the counter has
duke@435	1104	// // to be incremented in a private block on a loop backedge.
duke@435	1105	// if( du && du->cnt(this) && du->out(this)[0]->Opcode() == Op_CountedLoopEnd )
duke@435	1106	// return NULL;
duke@435	1107	// #ifndef PRODUCT
duke@435	1108	// // Do not do this in a wash GVN pass during verification.
duke@435	1109	// // Gets triggered by too many simple optimizations to be bothered with
duke@435	1110	// // re-trying it again and again.
duke@435	1111	// if( !phase->allow_progress() ) return NULL;
duke@435	1112	// #endif
duke@435	1113	// // Not valid for unsigned compare because of corner cases in involving zero.
duke@435	1114	// // For example, replacing "X-1 <u Y" with "X <=u Y" fails to throw an
duke@435	1115	// // exception in case X is 0 (because 0-1 turns into 4billion unsigned but
duke@435	1116	// // "0 <=u Y" is always true).
duke@435	1117	// if( cmp->Opcode() == Op_CmpU ) return NULL;
duke@435	1118	// int cmp2_op = cmp2->Opcode();
duke@435	1119	// if( _test._test == BoolTest::le ) {
duke@435	1120	// if( cmp1_op == Op_AddI &&
duke@435	1121	// phase->type( cmp1->in(2) ) == TypeInt::ONE )
duke@435	1122	// return clone_cmp( cmp, cmp1->in(1), cmp2, phase, BoolTest::lt );
duke@435	1123	// else if( cmp2_op == Op_AddI &&
duke@435	1124	// phase->type( cmp2->in(2) ) == TypeInt::MINUS_1 )
duke@435	1125	// return clone_cmp( cmp, cmp1, cmp2->in(1), phase, BoolTest::lt );
duke@435	1126	// } else if( _test._test == BoolTest::lt ) {
duke@435	1127	// if( cmp1_op == Op_AddI &&
duke@435	1128	// phase->type( cmp1->in(2) ) == TypeInt::MINUS_1 )
duke@435	1129	// return clone_cmp( cmp, cmp1->in(1), cmp2, phase, BoolTest::le );
duke@435	1130	// else if( cmp2_op == Op_AddI &&
duke@435	1131	// phase->type( cmp2->in(2) ) == TypeInt::ONE )
duke@435	1132	// return clone_cmp( cmp, cmp1, cmp2->in(1), phase, BoolTest::le );
duke@435	1133	// }
duke@435	1134
duke@435	1135	return NULL;
duke@435	1136	}
duke@435	1137
duke@435	1138	//------------------------------Value------------------------------------------
duke@435	1139	// Simplify a Bool (convert condition codes to boolean (1 or 0)) node,
duke@435	1140	// based on local information. If the input is constant, do it.
duke@435	1141	const Type *BoolNode::Value( PhaseTransform *phase ) const {
duke@435	1142	return _test.cc2logical( phase->type( in(1) ) );
duke@435	1143	}
duke@435	1144
duke@435	1145	//------------------------------dump_spec--------------------------------------
duke@435	1146	// Dump special per-node info
duke@435	1147	#ifndef PRODUCT
duke@435	1148	void BoolNode::dump_spec(outputStream *st) const {
duke@435	1149	st->print("[");
duke@435	1150	_test.dump_on(st);
duke@435	1151	st->print("]");
duke@435	1152	}
duke@435	1153	#endif
duke@435	1154
duke@435	1155	//------------------------------is_counted_loop_exit_test--------------------------------------
duke@435	1156	// Returns true if node is used by a counted loop node.
duke@435	1157	bool BoolNode::is_counted_loop_exit_test() {
duke@435	1158	for( DUIterator_Fast imax, i = fast_outs(imax); i < imax; i++ ) {
duke@435	1159	Node* use = fast_out(i);
duke@435	1160	if (use->is_CountedLoopEnd()) {
duke@435	1161	return true;
duke@435	1162	}
duke@435	1163	}
duke@435	1164	return false;
duke@435	1165	}
duke@435	1166
duke@435	1167	//=============================================================================
duke@435	1168	//------------------------------NegNode----------------------------------------
duke@435	1169	Node *NegFNode::Ideal(PhaseGVN *phase, bool can_reshape) {
duke@435	1170	if( in(1)->Opcode() == Op_SubF )
duke@435	1171	return new (phase->C, 3) SubFNode( in(1)->in(2), in(1)->in(1) );
duke@435	1172	return NULL;
duke@435	1173	}
duke@435	1174
duke@435	1175	Node *NegDNode::Ideal(PhaseGVN *phase, bool can_reshape) {
duke@435	1176	if( in(1)->Opcode() == Op_SubD )
duke@435	1177	return new (phase->C, 3) SubDNode( in(1)->in(2), in(1)->in(1) );
duke@435	1178	return NULL;
duke@435	1179	}
duke@435	1180
duke@435	1181
duke@435	1182	//=============================================================================
duke@435	1183	//------------------------------Value------------------------------------------
duke@435	1184	// Compute sqrt
duke@435	1185	const Type *SqrtDNode::Value( PhaseTransform *phase ) const {
duke@435	1186	const Type *t1 = phase->type( in(1) );
duke@435	1187	if( t1 == Type::TOP ) return Type::TOP;
duke@435	1188	if( t1->base() != Type::DoubleCon ) return Type::DOUBLE;
duke@435	1189	double d = t1->getd();
duke@435	1190	if( d < 0.0 ) return Type::DOUBLE;
duke@435	1191	return TypeD::make( sqrt( d ) );
duke@435	1192	}
duke@435	1193
duke@435	1194	//=============================================================================
duke@435	1195	//------------------------------Value------------------------------------------
duke@435	1196	// Compute cos
duke@435	1197	const Type *CosDNode::Value( PhaseTransform *phase ) const {
duke@435	1198	const Type *t1 = phase->type( in(1) );
duke@435	1199	if( t1 == Type::TOP ) return Type::TOP;
duke@435	1200	if( t1->base() != Type::DoubleCon ) return Type::DOUBLE;
duke@435	1201	double d = t1->getd();
duke@435	1202	if( d < 0.0 ) return Type::DOUBLE;
duke@435	1203	return TypeD::make( SharedRuntime::dcos( d ) );
duke@435	1204	}
duke@435	1205
duke@435	1206	//=============================================================================
duke@435	1207	//------------------------------Value------------------------------------------
duke@435	1208	// Compute sin
duke@435	1209	const Type *SinDNode::Value( PhaseTransform *phase ) const {
duke@435	1210	const Type *t1 = phase->type( in(1) );
duke@435	1211	if( t1 == Type::TOP ) return Type::TOP;
duke@435	1212	if( t1->base() != Type::DoubleCon ) return Type::DOUBLE;
duke@435	1213	double d = t1->getd();
duke@435	1214	if( d < 0.0 ) return Type::DOUBLE;
duke@435	1215	return TypeD::make( SharedRuntime::dsin( d ) );
duke@435	1216	}
duke@435	1217
duke@435	1218	//=============================================================================
duke@435	1219	//------------------------------Value------------------------------------------
duke@435	1220	// Compute tan
duke@435	1221	const Type *TanDNode::Value( PhaseTransform *phase ) const {
duke@435	1222	const Type *t1 = phase->type( in(1) );
duke@435	1223	if( t1 == Type::TOP ) return Type::TOP;
duke@435	1224	if( t1->base() != Type::DoubleCon ) return Type::DOUBLE;
duke@435	1225	double d = t1->getd();
duke@435	1226	if( d < 0.0 ) return Type::DOUBLE;
duke@435	1227	return TypeD::make( SharedRuntime::dtan( d ) );
duke@435	1228	}
duke@435	1229
duke@435	1230	//=============================================================================
duke@435	1231	//------------------------------Value------------------------------------------
duke@435	1232	// Compute log
duke@435	1233	const Type *LogDNode::Value( PhaseTransform *phase ) const {
duke@435	1234	const Type *t1 = phase->type( in(1) );
duke@435	1235	if( t1 == Type::TOP ) return Type::TOP;
duke@435	1236	if( t1->base() != Type::DoubleCon ) return Type::DOUBLE;
duke@435	1237	double d = t1->getd();
duke@435	1238	if( d < 0.0 ) return Type::DOUBLE;
duke@435	1239	return TypeD::make( SharedRuntime::dlog( d ) );
duke@435	1240	}
duke@435	1241
duke@435	1242	//=============================================================================
duke@435	1243	//------------------------------Value------------------------------------------
duke@435	1244	// Compute log10
duke@435	1245	const Type *Log10DNode::Value( PhaseTransform *phase ) const {
duke@435	1246	const Type *t1 = phase->type( in(1) );
duke@435	1247	if( t1 == Type::TOP ) return Type::TOP;
duke@435	1248	if( t1->base() != Type::DoubleCon ) return Type::DOUBLE;
duke@435	1249	double d = t1->getd();
duke@435	1250	if( d < 0.0 ) return Type::DOUBLE;
duke@435	1251	return TypeD::make( SharedRuntime::dlog10( d ) );
duke@435	1252	}
duke@435	1253
duke@435	1254	//=============================================================================
duke@435	1255	//------------------------------Value------------------------------------------
duke@435	1256	// Compute exp
duke@435	1257	const Type *ExpDNode::Value( PhaseTransform *phase ) const {
duke@435	1258	const Type *t1 = phase->type( in(1) );
duke@435	1259	if( t1 == Type::TOP ) return Type::TOP;
duke@435	1260	if( t1->base() != Type::DoubleCon ) return Type::DOUBLE;
duke@435	1261	double d = t1->getd();
duke@435	1262	if( d < 0.0 ) return Type::DOUBLE;
duke@435	1263	return TypeD::make( SharedRuntime::dexp( d ) );
duke@435	1264	}
duke@435	1265
duke@435	1266
duke@435	1267	//=============================================================================
duke@435	1268	//------------------------------Value------------------------------------------
duke@435	1269	// Compute pow
duke@435	1270	const Type *PowDNode::Value( PhaseTransform *phase ) const {
duke@435	1271	const Type *t1 = phase->type( in(1) );
duke@435	1272	if( t1 == Type::TOP ) return Type::TOP;
duke@435	1273	if( t1->base() != Type::DoubleCon ) return Type::DOUBLE;
duke@435	1274	const Type *t2 = phase->type( in(2) );
duke@435	1275	if( t2 == Type::TOP ) return Type::TOP;
duke@435	1276	if( t2->base() != Type::DoubleCon ) return Type::DOUBLE;
duke@435	1277	double d1 = t1->getd();
duke@435	1278	double d2 = t2->getd();
duke@435	1279	if( d1 < 0.0 ) return Type::DOUBLE;
duke@435	1280	if( d2 < 0.0 ) return Type::DOUBLE;
duke@435	1281	return TypeD::make( SharedRuntime::dpow( d1, d2 ) );
duke@435	1282	}