Mercurial > hg > truffle
diff src/share/vm/opto/connode.cpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | f34d9da7acb2 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/opto/connode.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,1227 @@ +/* + * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// Optimization - Graph Style + +#include "incls/_precompiled.incl" +#include "incls/_connode.cpp.incl" + +//============================================================================= +//------------------------------hash------------------------------------------- +uint ConNode::hash() const { + return (uintptr_t)in(TypeFunc::Control) + _type->hash(); +} + +//------------------------------make------------------------------------------- +ConNode *ConNode::make( Compile* C, const Type *t ) { + switch( t->basic_type() ) { + case T_INT: return new (C, 1) ConINode( t->is_int() ); + case T_ARRAY: return new (C, 1) ConPNode( t->is_aryptr() ); + case T_LONG: return new (C, 1) ConLNode( t->is_long() ); + case T_FLOAT: return new (C, 1) ConFNode( t->is_float_constant() ); + case T_DOUBLE: return new (C, 1) ConDNode( t->is_double_constant() ); + case T_VOID: return new (C, 1) ConNode ( Type::TOP ); + case T_OBJECT: return new (C, 1) ConPNode( t->is_oopptr() ); + case T_ADDRESS: return new (C, 1) ConPNode( t->is_ptr() ); + // Expected cases: TypePtr::NULL_PTR, any is_rawptr() + // Also seen: AnyPtr(TopPTR *+top); from command line: + // r -XX:+PrintOpto -XX:CIStart=285 -XX:+CompileTheWorld -XX:CompileTheWorldStartAt=660 + // %%%% Stop using TypePtr::NULL_PTR to represent nulls: use either TypeRawPtr::NULL_PTR + // or else TypeOopPtr::NULL_PTR. Then set Type::_basic_type[AnyPtr] = T_ILLEGAL + } + ShouldNotReachHere(); + return NULL; +} + +//============================================================================= +/* +The major change is for CMoveP and StrComp. They have related but slightly +different problems. They both take in TWO oops which are both null-checked +independently before the using Node. After CCP removes the CastPP's they need +to pick up the guarding test edge - in this case TWO control edges. I tried +various solutions, all have problems: + +(1) Do nothing. This leads to a bug where we hoist a Load from a CMoveP or a +StrComp above a guarding null check. I've seen both cases in normal -Xcomp +testing. + +(2) Plug the control edge from 1 of the 2 oops in. Apparent problem here is +to figure out which test post-dominates. The real problem is that it doesn't +matter which one you pick. After you pick up, the dominating-test elider in +IGVN can remove the test and allow you to hoist up to the dominating test on +the choosen oop bypassing the test on the not-choosen oop. Seen in testing. +Oops. + +(3) Leave the CastPP's in. This makes the graph more accurate in some sense; +we get to keep around the knowledge that an oop is not-null after some test. +Alas, the CastPP's interfere with GVN (some values are the regular oop, some +are the CastPP of the oop, all merge at Phi's which cannot collapse, etc). +This cost us 10% on SpecJVM, even when I removed some of the more trivial +cases in the optimizer. Removing more useless Phi's started allowing Loads to +illegally float above null checks. I gave up on this approach. + +(4) Add BOTH control edges to both tests. Alas, too much code knows that +control edges are in slot-zero ONLY. Many quick asserts fail; no way to do +this one. Note that I really want to allow the CMoveP to float and add both +control edges to the dependent Load op - meaning I can select early but I +cannot Load until I pass both tests. + +(5) Do not hoist CMoveP and StrComp. To this end I added the v-call +depends_only_on_test(). No obvious performance loss on Spec, but we are +clearly conservative on CMoveP (also so on StrComp but that's unlikely to +matter ever). + +*/ + + +//------------------------------Ideal------------------------------------------ +// Return a node which is more "ideal" than the current node. +// Move constants to the right. +Node *CMoveNode::Ideal(PhaseGVN *phase, bool can_reshape) { + if( in(0) && remove_dead_region(phase, can_reshape) ) return this; + assert( !phase->eqv(in(Condition), this) && + !phase->eqv(in(IfFalse), this) && + !phase->eqv(in(IfTrue), this), "dead loop in CMoveNode::Ideal" ); + if( phase->type(in(Condition)) == Type::TOP ) + return NULL; // return NULL when Condition is dead + + if( in(IfFalse)->is_Con() && !in(IfTrue)->is_Con() ) { + if( in(Condition)->is_Bool() ) { + BoolNode* b = in(Condition)->as_Bool(); + BoolNode* b2 = b->negate(phase); + return make( phase->C, in(Control), phase->transform(b2), in(IfTrue), in(IfFalse), _type ); + } + } + return NULL; +} + +//------------------------------is_cmove_id------------------------------------ +// Helper function to check for CMOVE identity. Shared with PhiNode::Identity +Node *CMoveNode::is_cmove_id( PhaseTransform *phase, Node *cmp, Node *t, Node *f, BoolNode *b ) { + // Check for Cmp'ing and CMove'ing same values + if( (phase->eqv(cmp->in(1),f) && + phase->eqv(cmp->in(2),t)) || + // Swapped Cmp is OK + (phase->eqv(cmp->in(2),f) && + phase->eqv(cmp->in(1),t)) ) { + // Check for "(t==f)?t:f;" and replace with "f" + if( b->_test._test == BoolTest::eq ) + return f; + // Allow the inverted case as well + // Check for "(t!=f)?t:f;" and replace with "t" + if( b->_test._test == BoolTest::ne ) + return t; + } + return NULL; +} + +//------------------------------Identity--------------------------------------- +// Conditional-move is an identity if both inputs are the same, or the test +// true or false. +Node *CMoveNode::Identity( PhaseTransform *phase ) { + if( phase->eqv(in(IfFalse),in(IfTrue)) ) // C-moving identical inputs? + return in(IfFalse); // Then it doesn't matter + if( phase->type(in(Condition)) == TypeInt::ZERO ) + return in(IfFalse); // Always pick left(false) input + if( phase->type(in(Condition)) == TypeInt::ONE ) + return in(IfTrue); // Always pick right(true) input + + // Check for CMove'ing a constant after comparing against the constant. + // Happens all the time now, since if we compare equality vs a constant in + // the parser, we "know" the variable is constant on one path and we force + // it. Thus code like "if( x==0 ) {/*EMPTY*/}" ends up inserting a + // conditional move: "x = (x==0)?0:x;". Yucko. This fix is slightly more + // general in that we don't need constants. + if( in(Condition)->is_Bool() ) { + BoolNode *b = in(Condition)->as_Bool(); + Node *cmp = b->in(1); + if( cmp->is_Cmp() ) { + Node *id = is_cmove_id( phase, cmp, in(IfTrue), in(IfFalse), b ); + if( id ) return id; + } + } + + return this; +} + +//------------------------------Value------------------------------------------ +// Result is the meet of inputs +const Type *CMoveNode::Value( PhaseTransform *phase ) const { + if( phase->type(in(Condition)) == Type::TOP ) + return Type::TOP; + return phase->type(in(IfFalse))->meet(phase->type(in(IfTrue))); +} + +//------------------------------make------------------------------------------- +// Make a correctly-flavored CMove. Since _type is directly determined +// from the inputs we do not need to specify it here. +CMoveNode *CMoveNode::make( Compile *C, Node *c, Node *bol, Node *left, Node *right, const Type *t ) { + switch( t->basic_type() ) { + case T_INT: return new (C, 4) CMoveINode( bol, left, right, t->is_int() ); + case T_FLOAT: return new (C, 4) CMoveFNode( bol, left, right, t ); + case T_DOUBLE: return new (C, 4) CMoveDNode( bol, left, right, t ); + case T_LONG: return new (C, 4) CMoveLNode( bol, left, right, t->is_long() ); + case T_OBJECT: return new (C, 4) CMovePNode( c, bol, left, right, t->is_oopptr() ); + case T_ADDRESS: return new (C, 4) CMovePNode( c, bol, left, right, t->is_ptr() ); + default: + ShouldNotReachHere(); + return NULL; + } +} + +//============================================================================= +//------------------------------Ideal------------------------------------------ +// Return a node which is more "ideal" than the current node. +// Check for conversions to boolean +Node *CMoveINode::Ideal(PhaseGVN *phase, bool can_reshape) { + // Try generic ideal's first + Node *x = CMoveNode::Ideal(phase, can_reshape); + if( x ) return x; + + // If zero is on the left (false-case, no-move-case) it must mean another + // constant is on the right (otherwise the shared CMove::Ideal code would + // have moved the constant to the right). This situation is bad for Intel + // and a don't-care for Sparc. It's bad for Intel because the zero has to + // be manifested in a register with a XOR which kills flags, which are live + // on input to the CMoveI, leading to a situation which causes excessive + // spilling on Intel. For Sparc, if the zero in on the left the Sparc will + // zero a register via G0 and conditionally-move the other constant. If the + // zero is on the right, the Sparc will load the first constant with a + // 13-bit set-lo and conditionally move G0. See bug 4677505. + if( phase->type(in(IfFalse)) == TypeInt::ZERO && !(phase->type(in(IfTrue)) == TypeInt::ZERO) ) { + if( in(Condition)->is_Bool() ) { + BoolNode* b = in(Condition)->as_Bool(); + BoolNode* b2 = b->negate(phase); + return make( phase->C, in(Control), phase->transform(b2), in(IfTrue), in(IfFalse), _type ); + } + } + + // Now check for booleans + int flip = 0; + + // Check for picking from zero/one + if( phase->type(in(IfFalse)) == TypeInt::ZERO && phase->type(in(IfTrue)) == TypeInt::ONE ) { + flip = 1 - flip; + } else if( phase->type(in(IfFalse)) == TypeInt::ONE && phase->type(in(IfTrue)) == TypeInt::ZERO ) { + } else return NULL; + + // Check for eq/ne test + if( !in(1)->is_Bool() ) return NULL; + BoolNode *bol = in(1)->as_Bool(); + if( bol->_test._test == BoolTest::eq ) { + } else if( bol->_test._test == BoolTest::ne ) { + flip = 1-flip; + } else return NULL; + + // Check for vs 0 or 1 + if( !bol->in(1)->is_Cmp() ) return NULL; + const CmpNode *cmp = bol->in(1)->as_Cmp(); + if( phase->type(cmp->in(2)) == TypeInt::ZERO ) { + } else if( phase->type(cmp->in(2)) == TypeInt::ONE ) { + // Allow cmp-vs-1 if the other input is bounded by 0-1 + if( phase->type(cmp->in(1)) != TypeInt::BOOL ) + return NULL; + flip = 1 - flip; + } else return NULL; + + // Convert to a bool (flipped) + // Build int->bool conversion +#ifndef PRODUCT + if( PrintOpto ) tty->print_cr("CMOV to I2B"); +#endif + Node *n = new (phase->C, 2) Conv2BNode( cmp->in(1) ); + if( flip ) + n = new (phase->C, 3) XorINode( phase->transform(n), phase->intcon(1) ); + + return n; +} + +//============================================================================= +//------------------------------Ideal------------------------------------------ +// Return a node which is more "ideal" than the current node. +// Check for absolute value +Node *CMoveFNode::Ideal(PhaseGVN *phase, bool can_reshape) { + // Try generic ideal's first + Node *x = CMoveNode::Ideal(phase, can_reshape); + if( x ) return x; + + int cmp_zero_idx = 0; // Index of compare input where to look for zero + int phi_x_idx = 0; // Index of phi input where to find naked x + + // Find the Bool + if( !in(1)->is_Bool() ) return NULL; + BoolNode *bol = in(1)->as_Bool(); + // Check bool sense + switch( bol->_test._test ) { + case BoolTest::lt: cmp_zero_idx = 1; phi_x_idx = IfTrue; break; + case BoolTest::le: cmp_zero_idx = 2; phi_x_idx = IfFalse; break; + case BoolTest::gt: cmp_zero_idx = 2; phi_x_idx = IfTrue; break; + case BoolTest::ge: cmp_zero_idx = 1; phi_x_idx = IfFalse; break; + default: return NULL; break; + } + + // Find zero input of CmpF; the other input is being abs'd + Node *cmpf = bol->in(1); + if( cmpf->Opcode() != Op_CmpF ) return NULL; + Node *X = NULL; + bool flip = false; + if( phase->type(cmpf->in(cmp_zero_idx)) == TypeF::ZERO ) { + X = cmpf->in(3 - cmp_zero_idx); + } else if (phase->type(cmpf->in(3 - cmp_zero_idx)) == TypeF::ZERO) { + // The test is inverted, we should invert the result... + X = cmpf->in(cmp_zero_idx); + flip = true; + } else { + return NULL; + } + + // If X is found on the appropriate phi input, find the subtract on the other + if( X != in(phi_x_idx) ) return NULL; + int phi_sub_idx = phi_x_idx == IfTrue ? IfFalse : IfTrue; + Node *sub = in(phi_sub_idx); + + // Allow only SubF(0,X) and fail out for all others; NegF is not OK + if( sub->Opcode() != Op_SubF || + sub->in(2) != X || + phase->type(sub->in(1)) != TypeF::ZERO ) return NULL; + + Node *abs = new (phase->C, 2) AbsFNode( X ); + if( flip ) + abs = new (phase->C, 3) SubFNode(sub->in(1), phase->transform(abs)); + + return abs; +} + +//============================================================================= +//------------------------------Ideal------------------------------------------ +// Return a node which is more "ideal" than the current node. +// Check for absolute value +Node *CMoveDNode::Ideal(PhaseGVN *phase, bool can_reshape) { + // Try generic ideal's first + Node *x = CMoveNode::Ideal(phase, can_reshape); + if( x ) return x; + + int cmp_zero_idx = 0; // Index of compare input where to look for zero + int phi_x_idx = 0; // Index of phi input where to find naked x + + // Find the Bool + if( !in(1)->is_Bool() ) return NULL; + BoolNode *bol = in(1)->as_Bool(); + // Check bool sense + switch( bol->_test._test ) { + case BoolTest::lt: cmp_zero_idx = 1; phi_x_idx = IfTrue; break; + case BoolTest::le: cmp_zero_idx = 2; phi_x_idx = IfFalse; break; + case BoolTest::gt: cmp_zero_idx = 2; phi_x_idx = IfTrue; break; + case BoolTest::ge: cmp_zero_idx = 1; phi_x_idx = IfFalse; break; + default: return NULL; break; + } + + // Find zero input of CmpD; the other input is being abs'd + Node *cmpd = bol->in(1); + if( cmpd->Opcode() != Op_CmpD ) return NULL; + Node *X = NULL; + bool flip = false; + if( phase->type(cmpd->in(cmp_zero_idx)) == TypeD::ZERO ) { + X = cmpd->in(3 - cmp_zero_idx); + } else if (phase->type(cmpd->in(3 - cmp_zero_idx)) == TypeD::ZERO) { + // The test is inverted, we should invert the result... + X = cmpd->in(cmp_zero_idx); + flip = true; + } else { + return NULL; + } + + // If X is found on the appropriate phi input, find the subtract on the other + if( X != in(phi_x_idx) ) return NULL; + int phi_sub_idx = phi_x_idx == IfTrue ? IfFalse : IfTrue; + Node *sub = in(phi_sub_idx); + + // Allow only SubD(0,X) and fail out for all others; NegD is not OK + if( sub->Opcode() != Op_SubD || + sub->in(2) != X || + phase->type(sub->in(1)) != TypeD::ZERO ) return NULL; + + Node *abs = new (phase->C, 2) AbsDNode( X ); + if( flip ) + abs = new (phase->C, 3) SubDNode(sub->in(1), phase->transform(abs)); + + return abs; +} + + +//============================================================================= +// If input is already higher or equal to cast type, then this is an identity. +Node *ConstraintCastNode::Identity( PhaseTransform *phase ) { + return phase->type(in(1))->higher_equal(_type) ? in(1) : this; +} + +//------------------------------Value------------------------------------------ +// Take 'join' of input and cast-up type +const Type *ConstraintCastNode::Value( PhaseTransform *phase ) const { + if( in(0) && phase->type(in(0)) == Type::TOP ) return Type::TOP; + const Type* ft = phase->type(in(1))->filter(_type); + +#ifdef ASSERT + // Previous versions of this function had some special case logic, + // which is no longer necessary. Make sure of the required effects. + switch (Opcode()) { + case Op_CastII: + { + const Type* t1 = phase->type(in(1)); + if( t1 == Type::TOP ) assert(ft == Type::TOP, "special case #1"); + const Type* rt = t1->join(_type); + if (rt->empty()) assert(ft == Type::TOP, "special case #2"); + break; + } + case Op_CastPP: + if (phase->type(in(1)) == TypePtr::NULL_PTR && + _type->isa_ptr() && _type->is_ptr()->_ptr == TypePtr::NotNull) + assert(ft == Type::TOP, "special case #3"); + break; + } +#endif //ASSERT + + return ft; +} + +//------------------------------Ideal------------------------------------------ +// Return a node which is more "ideal" than the current node. Strip out +// control copies +Node *ConstraintCastNode::Ideal(PhaseGVN *phase, bool can_reshape){ + return (in(0) && remove_dead_region(phase, can_reshape)) ? this : NULL; +} + +//------------------------------Ideal_DU_postCCP------------------------------- +// Throw away cast after constant propagation +Node *ConstraintCastNode::Ideal_DU_postCCP( PhaseCCP *ccp ) { + const Type *t = ccp->type(in(1)); + ccp->hash_delete(this); + set_type(t); // Turn into ID function + ccp->hash_insert(this); + return this; +} + + +//============================================================================= + +//------------------------------Ideal_DU_postCCP------------------------------- +// If not converting int->oop, throw away cast after constant propagation +Node *CastPPNode::Ideal_DU_postCCP( PhaseCCP *ccp ) { + const Type *t = ccp->type(in(1)); + if (!t->isa_oop_ptr()) { + return NULL; // do not transform raw pointers + } + return ConstraintCastNode::Ideal_DU_postCCP(ccp); +} + + + +//============================================================================= +//------------------------------Identity--------------------------------------- +// If input is already higher or equal to cast type, then this is an identity. +Node *CheckCastPPNode::Identity( PhaseTransform *phase ) { + // Toned down to rescue meeting at a Phi 3 different oops all implementing + // the same interface. CompileTheWorld starting at 502, kd12rc1.zip. + return (phase->type(in(1)) == phase->type(this)) ? in(1) : this; +} + +// Determine whether "n" is a node which can cause an alias of one of its inputs. Node types +// which can create aliases are: CheckCastPP, Phi, and any store (if there is also a load from +// the location.) +// Note: this checks for aliases created in this compilation, not ones which may +// be potentially created at call sites. +static bool can_cause_alias(Node *n, PhaseTransform *phase) { + bool possible_alias = false; + + if (n->is_Store()) { + possible_alias = !n->as_Store()->value_never_loaded(phase); + } else { + int opc = n->Opcode(); + possible_alias = n->is_Phi() || + opc == Op_CheckCastPP || + opc == Op_StorePConditional || + opc == Op_CompareAndSwapP; + } + return possible_alias; +} + +//------------------------------Value------------------------------------------ +// Take 'join' of input and cast-up type, unless working with an Interface +const Type *CheckCastPPNode::Value( PhaseTransform *phase ) const { + if( in(0) && phase->type(in(0)) == Type::TOP ) return Type::TOP; + + const Type *inn = phase->type(in(1)); + if( inn == Type::TOP ) return Type::TOP; // No information yet + + const TypePtr *in_type = inn->isa_ptr(); + const TypePtr *my_type = _type->isa_ptr(); + const Type *result = _type; + if( in_type != NULL && my_type != NULL ) { + TypePtr::PTR in_ptr = in_type->ptr(); + if( in_ptr == TypePtr::Null ) { + result = in_type; + } else if( in_ptr == TypePtr::Constant ) { + // Casting a constant oop to an interface? + // (i.e., a String to a Comparable?) + // Then return the interface. + const TypeOopPtr *jptr = my_type->isa_oopptr(); + assert( jptr, "" ); + result = (jptr->klass()->is_interface() || !in_type->higher_equal(_type)) + ? my_type->cast_to_ptr_type( TypePtr::NotNull ) + : in_type; + } else { + result = my_type->cast_to_ptr_type( my_type->join_ptr(in_ptr) ); + } + } + return result; + + // JOIN NOT DONE HERE BECAUSE OF INTERFACE ISSUES. + // FIX THIS (DO THE JOIN) WHEN UNION TYPES APPEAR! + + // + // Remove this code after overnight run indicates no performance + // loss from not performing JOIN at CheckCastPPNode + // + // const TypeInstPtr *in_oop = in->isa_instptr(); + // const TypeInstPtr *my_oop = _type->isa_instptr(); + // // If either input is an 'interface', return destination type + // assert (in_oop == NULL || in_oop->klass() != NULL, ""); + // assert (my_oop == NULL || my_oop->klass() != NULL, ""); + // if( (in_oop && in_oop->klass()->klass_part()->is_interface()) + // ||(my_oop && my_oop->klass()->klass_part()->is_interface()) ) { + // TypePtr::PTR in_ptr = in->isa_ptr() ? in->is_ptr()->_ptr : TypePtr::BotPTR; + // // Preserve cast away nullness for interfaces + // if( in_ptr == TypePtr::NotNull && my_oop && my_oop->_ptr == TypePtr::BotPTR ) { + // return my_oop->cast_to_ptr_type(TypePtr::NotNull); + // } + // return _type; + // } + // + // // Neither the input nor the destination type is an interface, + // + // // history: JOIN used to cause weird corner case bugs + // // return (in == TypeOopPtr::NULL_PTR) ? in : _type; + // // JOIN picks up NotNull in common instance-of/check-cast idioms, both oops. + // // JOIN does not preserve NotNull in other cases, e.g. RawPtr vs InstPtr + // const Type *join = in->join(_type); + // // Check if join preserved NotNull'ness for pointers + // if( join->isa_ptr() && _type->isa_ptr() ) { + // TypePtr::PTR join_ptr = join->is_ptr()->_ptr; + // TypePtr::PTR type_ptr = _type->is_ptr()->_ptr; + // // If there isn't any NotNull'ness to preserve + // // OR if join preserved NotNull'ness then return it + // if( type_ptr == TypePtr::BotPTR || type_ptr == TypePtr::Null || + // join_ptr == TypePtr::NotNull || join_ptr == TypePtr::Constant ) { + // return join; + // } + // // ELSE return same old type as before + // return _type; + // } + // // Not joining two pointers + // return join; +} + +//------------------------------Ideal------------------------------------------ +// Return a node which is more "ideal" than the current node. Strip out +// control copies +Node *CheckCastPPNode::Ideal(PhaseGVN *phase, bool can_reshape){ + return (in(0) && remove_dead_region(phase, can_reshape)) ? this : NULL; +} + +//============================================================================= +//------------------------------Identity--------------------------------------- +Node *Conv2BNode::Identity( PhaseTransform *phase ) { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return in(1); + if( t == TypeInt::ZERO ) return in(1); + if( t == TypeInt::ONE ) return in(1); + if( t == TypeInt::BOOL ) return in(1); + return this; +} + +//------------------------------Value------------------------------------------ +const Type *Conv2BNode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + if( t == TypeInt::ZERO ) return TypeInt::ZERO; + if( t == TypePtr::NULL_PTR ) return TypeInt::ZERO; + const TypePtr *tp = t->isa_ptr(); + if( tp != NULL ) { + if( tp->ptr() == TypePtr::AnyNull ) return Type::TOP; + if( tp->ptr() == TypePtr::Constant) return TypeInt::ONE; + if (tp->ptr() == TypePtr::NotNull) return TypeInt::ONE; + return TypeInt::BOOL; + } + if (t->base() != Type::Int) return TypeInt::BOOL; + const TypeInt *ti = t->is_int(); + if( ti->_hi < 0 || ti->_lo > 0 ) return TypeInt::ONE; + return TypeInt::BOOL; +} + + +// The conversions operations are all Alpha sorted. Please keep it that way! +//============================================================================= +//------------------------------Value------------------------------------------ +const Type *ConvD2FNode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + if( t == Type::DOUBLE ) return Type::FLOAT; + const TypeD *td = t->is_double_constant(); + return TypeF::make( (float)td->getd() ); +} + +//------------------------------Identity--------------------------------------- +// Float's can be converted to doubles with no loss of bits. Hence +// converting a float to a double and back to a float is a NOP. +Node *ConvD2FNode::Identity(PhaseTransform *phase) { + return (in(1)->Opcode() == Op_ConvF2D) ? in(1)->in(1) : this; +} + +//============================================================================= +//------------------------------Value------------------------------------------ +const Type *ConvD2INode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + if( t == Type::DOUBLE ) return TypeInt::INT; + const TypeD *td = t->is_double_constant(); + return TypeInt::make( SharedRuntime::d2i( td->getd() ) ); +} + +//------------------------------Ideal------------------------------------------ +// If converting to an int type, skip any rounding nodes +Node *ConvD2INode::Ideal(PhaseGVN *phase, bool can_reshape) { + if( in(1)->Opcode() == Op_RoundDouble ) + set_req(1,in(1)->in(1)); + return NULL; +} + +//------------------------------Identity--------------------------------------- +// Int's can be converted to doubles with no loss of bits. Hence +// converting an integer to a double and back to an integer is a NOP. +Node *ConvD2INode::Identity(PhaseTransform *phase) { + return (in(1)->Opcode() == Op_ConvI2D) ? in(1)->in(1) : this; +} + +//============================================================================= +//------------------------------Value------------------------------------------ +const Type *ConvD2LNode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + if( t == Type::DOUBLE ) return TypeLong::LONG; + const TypeD *td = t->is_double_constant(); + return TypeLong::make( SharedRuntime::d2l( td->getd() ) ); +} + +//------------------------------Identity--------------------------------------- +Node *ConvD2LNode::Identity(PhaseTransform *phase) { + // Remove ConvD2L->ConvL2D->ConvD2L sequences. + if( in(1) ->Opcode() == Op_ConvL2D && + in(1)->in(1)->Opcode() == Op_ConvD2L ) + return in(1)->in(1); + return this; +} + +//------------------------------Ideal------------------------------------------ +// If converting to an int type, skip any rounding nodes +Node *ConvD2LNode::Ideal(PhaseGVN *phase, bool can_reshape) { + if( in(1)->Opcode() == Op_RoundDouble ) + set_req(1,in(1)->in(1)); + return NULL; +} + +//============================================================================= +//------------------------------Value------------------------------------------ +const Type *ConvF2DNode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + if( t == Type::FLOAT ) return Type::DOUBLE; + const TypeF *tf = t->is_float_constant(); +#ifndef IA64 + return TypeD::make( (double)tf->getf() ); +#else + float x = tf->getf(); + return TypeD::make( (x == 0.0f) ? (double)x : (double)x + ia64_double_zero ); +#endif +} + +//============================================================================= +//------------------------------Value------------------------------------------ +const Type *ConvF2INode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + if( t == Type::FLOAT ) return TypeInt::INT; + const TypeF *tf = t->is_float_constant(); + return TypeInt::make( SharedRuntime::f2i( tf->getf() ) ); +} + +//------------------------------Identity--------------------------------------- +Node *ConvF2INode::Identity(PhaseTransform *phase) { + // Remove ConvF2I->ConvI2F->ConvF2I sequences. + if( in(1) ->Opcode() == Op_ConvI2F && + in(1)->in(1)->Opcode() == Op_ConvF2I ) + return in(1)->in(1); + return this; +} + +//------------------------------Ideal------------------------------------------ +// If converting to an int type, skip any rounding nodes +Node *ConvF2INode::Ideal(PhaseGVN *phase, bool can_reshape) { + if( in(1)->Opcode() == Op_RoundFloat ) + set_req(1,in(1)->in(1)); + return NULL; +} + +//============================================================================= +//------------------------------Value------------------------------------------ +const Type *ConvF2LNode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + if( t == Type::FLOAT ) return TypeLong::LONG; + const TypeF *tf = t->is_float_constant(); + return TypeLong::make( SharedRuntime::f2l( tf->getf() ) ); +} + +//------------------------------Identity--------------------------------------- +Node *ConvF2LNode::Identity(PhaseTransform *phase) { + // Remove ConvF2L->ConvL2F->ConvF2L sequences. + if( in(1) ->Opcode() == Op_ConvL2F && + in(1)->in(1)->Opcode() == Op_ConvF2L ) + return in(1)->in(1); + return this; +} + +//------------------------------Ideal------------------------------------------ +// If converting to an int type, skip any rounding nodes +Node *ConvF2LNode::Ideal(PhaseGVN *phase, bool can_reshape) { + if( in(1)->Opcode() == Op_RoundFloat ) + set_req(1,in(1)->in(1)); + return NULL; +} + +//============================================================================= +//------------------------------Value------------------------------------------ +const Type *ConvI2DNode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + const TypeInt *ti = t->is_int(); + if( ti->is_con() ) return TypeD::make( (double)ti->get_con() ); + return bottom_type(); +} + +//============================================================================= +//------------------------------Value------------------------------------------ +const Type *ConvI2FNode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + const TypeInt *ti = t->is_int(); + if( ti->is_con() ) return TypeF::make( (float)ti->get_con() ); + return bottom_type(); +} + +//------------------------------Identity--------------------------------------- +Node *ConvI2FNode::Identity(PhaseTransform *phase) { + // Remove ConvI2F->ConvF2I->ConvI2F sequences. + if( in(1) ->Opcode() == Op_ConvF2I && + in(1)->in(1)->Opcode() == Op_ConvI2F ) + return in(1)->in(1); + return this; +} + +//============================================================================= +//------------------------------Value------------------------------------------ +const Type *ConvI2LNode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + const TypeInt *ti = t->is_int(); + const Type* tl = TypeLong::make(ti->_lo, ti->_hi, ti->_widen); + // Join my declared type against my incoming type. + tl = tl->filter(_type); + return tl; +} + +#ifdef _LP64 +static inline bool long_ranges_overlap(jlong lo1, jlong hi1, + jlong lo2, jlong hi2) { + // Two ranges overlap iff one range's low point falls in the other range. + return (lo2 <= lo1 && lo1 <= hi2) || (lo1 <= lo2 && lo2 <= hi1); +} +#endif + +//------------------------------Ideal------------------------------------------ +Node *ConvI2LNode::Ideal(PhaseGVN *phase, bool can_reshape) { + const TypeLong* this_type = this->type()->is_long(); + Node* this_changed = NULL; + + // If _major_progress, then more loop optimizations follow. Do NOT + // remove this node's type assertion until no more loop ops can happen. + // The progress bit is set in the major loop optimizations THEN comes the + // call to IterGVN and any chance of hitting this code. Cf. Opaque1Node. + if (can_reshape && !phase->C->major_progress()) { + const TypeInt* in_type = phase->type(in(1))->isa_int(); + if (in_type != NULL && this_type != NULL && + (in_type->_lo != this_type->_lo || + in_type->_hi != this_type->_hi)) { + // Although this WORSENS the type, it increases GVN opportunities, + // because I2L nodes with the same input will common up, regardless + // of slightly differing type assertions. Such slight differences + // arise routinely as a result of loop unrolling, so this is a + // post-unrolling graph cleanup. Choose a type which depends only + // on my input. (Exception: Keep a range assertion of >=0 or <0.) + jlong lo1 = this_type->_lo; + jlong hi1 = this_type->_hi; + int w1 = this_type->_widen; + if (lo1 != (jint)lo1 || + hi1 != (jint)hi1 || + lo1 > hi1) { + // Overflow leads to wraparound, wraparound leads to range saturation. + lo1 = min_jint; hi1 = max_jint; + } else if (lo1 >= 0) { + // Keep a range assertion of >=0. + lo1 = 0; hi1 = max_jint; + } else if (hi1 < 0) { + // Keep a range assertion of <0. + lo1 = min_jint; hi1 = -1; + } else { + lo1 = min_jint; hi1 = max_jint; + } + const TypeLong* wtype = TypeLong::make(MAX2((jlong)in_type->_lo, lo1), + MIN2((jlong)in_type->_hi, hi1), + MAX2((int)in_type->_widen, w1)); + if (wtype != type()) { + set_type(wtype); + // Note: this_type still has old type value, for the logic below. + this_changed = this; + } + } + } + +#ifdef _LP64 + // Convert ConvI2L(AddI(x, y)) to AddL(ConvI2L(x), ConvI2L(y)) , + // but only if x and y have subranges that cannot cause 32-bit overflow, + // under the assumption that x+y is in my own subrange this->type(). + + // This assumption is based on a constraint (i.e., type assertion) + // established in Parse::array_addressing or perhaps elsewhere. + // This constraint has been adjoined to the "natural" type of + // the incoming argument in(0). We know (because of runtime + // checks) - that the result value I2L(x+y) is in the joined range. + // Hence we can restrict the incoming terms (x, y) to values such + // that their sum also lands in that range. + + // This optimization is useful only on 64-bit systems, where we hope + // the addition will end up subsumed in an addressing mode. + // It is necessary to do this when optimizing an unrolled array + // copy loop such as x[i++] = y[i++]. + + // On 32-bit systems, it's better to perform as much 32-bit math as + // possible before the I2L conversion, because 32-bit math is cheaper. + // There's no common reason to "leak" a constant offset through the I2L. + // Addressing arithmetic will not absorb it as part of a 64-bit AddL. + + Node* z = in(1); + int op = z->Opcode(); + if (op == Op_AddI || op == Op_SubI) { + Node* x = z->in(1); + Node* y = z->in(2); + assert (x != z && y != z, "dead loop in ConvI2LNode::Ideal"); + if (phase->type(x) == Type::TOP) return this_changed; + if (phase->type(y) == Type::TOP) return this_changed; + const TypeInt* tx = phase->type(x)->is_int(); + const TypeInt* ty = phase->type(y)->is_int(); + const TypeLong* tz = this_type; + jlong xlo = tx->_lo; + jlong xhi = tx->_hi; + jlong ylo = ty->_lo; + jlong yhi = ty->_hi; + jlong zlo = tz->_lo; + jlong zhi = tz->_hi; + jlong vbit = CONST64(1) << BitsPerInt; + int widen = MAX2(tx->_widen, ty->_widen); + if (op == Op_SubI) { + jlong ylo0 = ylo; + ylo = -yhi; + yhi = -ylo0; + } + // See if x+y can cause positive overflow into z+2**32 + if (long_ranges_overlap(xlo+ylo, xhi+yhi, zlo+vbit, zhi+vbit)) { + return this_changed; + } + // See if x+y can cause negative overflow into z-2**32 + if (long_ranges_overlap(xlo+ylo, xhi+yhi, zlo-vbit, zhi-vbit)) { + return this_changed; + } + // Now it's always safe to assume x+y does not overflow. + // This is true even if some pairs x,y might cause overflow, as long + // as that overflow value cannot fall into [zlo,zhi]. + + // Confident that the arithmetic is "as if infinite precision", + // we can now use z's range to put constraints on those of x and y. + // The "natural" range of x [xlo,xhi] can perhaps be narrowed to a + // more "restricted" range by intersecting [xlo,xhi] with the + // range obtained by subtracting y's range from the asserted range + // of the I2L conversion. Here's the interval arithmetic algebra: + // x == z-y == [zlo,zhi]-[ylo,yhi] == [zlo,zhi]+[-yhi,-ylo] + // => x in [zlo-yhi, zhi-ylo] + // => x in [zlo-yhi, zhi-ylo] INTERSECT [xlo,xhi] + // => x in [xlo MAX zlo-yhi, xhi MIN zhi-ylo] + jlong rxlo = MAX2(xlo, zlo - yhi); + jlong rxhi = MIN2(xhi, zhi - ylo); + // And similarly, x changing place with y: + jlong rylo = MAX2(ylo, zlo - xhi); + jlong ryhi = MIN2(yhi, zhi - xlo); + if (rxlo > rxhi || rylo > ryhi) { + return this_changed; // x or y is dying; don't mess w/ it + } + if (op == Op_SubI) { + jlong rylo0 = rylo; + rylo = -ryhi; + ryhi = -rylo0; + } + + Node* cx = phase->transform( new (phase->C, 2) ConvI2LNode(x, TypeLong::make(rxlo, rxhi, widen)) ); + Node* cy = phase->transform( new (phase->C, 2) ConvI2LNode(y, TypeLong::make(rylo, ryhi, widen)) ); + switch (op) { + case Op_AddI: return new (phase->C, 3) AddLNode(cx, cy); + case Op_SubI: return new (phase->C, 3) SubLNode(cx, cy); + default: ShouldNotReachHere(); + } + } +#endif //_LP64 + + return this_changed; +} + +//============================================================================= +//------------------------------Value------------------------------------------ +const Type *ConvL2DNode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + const TypeLong *tl = t->is_long(); + if( tl->is_con() ) return TypeD::make( (double)tl->get_con() ); + return bottom_type(); +} + +//============================================================================= +//------------------------------Value------------------------------------------ +const Type *ConvL2FNode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + const TypeLong *tl = t->is_long(); + if( tl->is_con() ) return TypeF::make( (float)tl->get_con() ); + return bottom_type(); +} + +//============================================================================= +//----------------------------Identity----------------------------------------- +Node *ConvL2INode::Identity( PhaseTransform *phase ) { + // Convert L2I(I2L(x)) => x + if (in(1)->Opcode() == Op_ConvI2L) return in(1)->in(1); + return this; +} + +//------------------------------Value------------------------------------------ +const Type *ConvL2INode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + const TypeLong *tl = t->is_long(); + if (tl->is_con()) + // Easy case. + return TypeInt::make((jint)tl->get_con()); + return bottom_type(); +} + +//------------------------------Ideal------------------------------------------ +// Return a node which is more "ideal" than the current node. +// Blow off prior masking to int +Node *ConvL2INode::Ideal(PhaseGVN *phase, bool can_reshape) { + Node *andl = in(1); + uint andl_op = andl->Opcode(); + if( andl_op == Op_AndL ) { + // Blow off prior masking to int + if( phase->type(andl->in(2)) == TypeLong::make( 0xFFFFFFFF ) ) { + set_req(1,andl->in(1)); + return this; + } + } + + // Swap with a prior add: convL2I(addL(x,y)) ==> addI(convL2I(x),convL2I(y)) + // This replaces an 'AddL' with an 'AddI'. + if( andl_op == Op_AddL ) { + // Don't do this for nodes which have more than one user since + // we'll end up computing the long add anyway. + if (andl->outcnt() > 1) return NULL; + + Node* x = andl->in(1); + Node* y = andl->in(2); + assert( x != andl && y != andl, "dead loop in ConvL2INode::Ideal" ); + if (phase->type(x) == Type::TOP) return NULL; + if (phase->type(y) == Type::TOP) return NULL; + Node *add1 = phase->transform(new (phase->C, 2) ConvL2INode(x)); + Node *add2 = phase->transform(new (phase->C, 2) ConvL2INode(y)); + return new (phase->C, 3) AddINode(add1,add2); + } + + // Fold up with a prior LoadL: LoadL->ConvL2I ==> LoadI + // Requires we understand the 'endianess' of Longs. + if( andl_op == Op_LoadL ) { + Node *adr = andl->in(MemNode::Address); + // VM_LITTLE_ENDIAN is #defined appropriately in the Makefiles +#ifndef VM_LITTLE_ENDIAN + // The transformation can cause problems on BIG_ENDIAN architectures + // where the jint is not the same address as the jlong. Specifically, we + // will fail to insert an anti-dependence in GCM between the LoadI and a + // subsequent StoreL because different memory offsets provoke + // flatten_alias_type() into indicating two different types. See bug + // 4755222. + + // Node *base = adr->is_AddP() ? adr->in(AddPNode::Base) : adr; + // adr = phase->transform( new (phase->C, 4) AddPNode(base,adr,phase->MakeConX(sizeof(jint)))); + return NULL; +#else + if (phase->C->alias_type(andl->adr_type())->is_volatile()) { + // Picking up the low half by itself bypasses the atomic load and we could + // end up with more than one non-atomic load. See bugs 4432655 and 4526490. + // We could go to the trouble of iterating over andl's output edges and + // punting only if there's more than one real use, but we don't bother. + return NULL; + } + return new (phase->C, 3) LoadINode(andl->in(MemNode::Control),andl->in(MemNode::Memory),adr,((LoadLNode*)andl)->raw_adr_type()); +#endif + } + + return NULL; +} + +//============================================================================= +//------------------------------Value------------------------------------------ +const Type *CastX2PNode::Value( PhaseTransform *phase ) const { + const Type* t = phase->type(in(1)); + if (t->base() == Type_X && t->singleton()) { + uintptr_t bits = (uintptr_t) t->is_intptr_t()->get_con(); + if (bits == 0) return TypePtr::NULL_PTR; + return TypeRawPtr::make((address) bits); + } + return CastX2PNode::bottom_type(); +} + +//------------------------------Idealize--------------------------------------- +static inline bool fits_in_int(const Type* t, bool but_not_min_int = false) { + if (t == Type::TOP) return false; + const TypeX* tl = t->is_intptr_t(); + jint lo = min_jint; + jint hi = max_jint; + if (but_not_min_int) ++lo; // caller wants to negate the value w/o overflow + return (tl->_lo >= lo) && (tl->_hi <= hi); +} + +static inline Node* addP_of_X2P(PhaseGVN *phase, + Node* base, + Node* dispX, + bool negate = false) { + if (negate) { + dispX = new (phase->C, 3) SubXNode(phase->MakeConX(0), phase->transform(dispX)); + } + return new (phase->C, 4) AddPNode(phase->C->top(), + phase->transform(new (phase->C, 2) CastX2PNode(base)), + phase->transform(dispX)); +} + +Node *CastX2PNode::Ideal(PhaseGVN *phase, bool can_reshape) { + // convert CastX2P(AddX(x, y)) to AddP(CastX2P(x), y) if y fits in an int + int op = in(1)->Opcode(); + Node* x; + Node* y; + switch (op) { + case Op_SubX: + x = in(1)->in(1); + y = in(1)->in(2); + if (fits_in_int(phase->type(y), true)) { + return addP_of_X2P(phase, x, y, true); + } + break; + case Op_AddX: + x = in(1)->in(1); + y = in(1)->in(2); + if (fits_in_int(phase->type(y))) { + return addP_of_X2P(phase, x, y); + } + if (fits_in_int(phase->type(x))) { + return addP_of_X2P(phase, y, x); + } + break; + } + return NULL; +} + +//------------------------------Identity--------------------------------------- +Node *CastX2PNode::Identity( PhaseTransform *phase ) { + if (in(1)->Opcode() == Op_CastP2X) return in(1)->in(1); + return this; +} + +//============================================================================= +//------------------------------Value------------------------------------------ +const Type *CastP2XNode::Value( PhaseTransform *phase ) const { + const Type* t = phase->type(in(1)); + if (t->base() == Type::RawPtr && t->singleton()) { + uintptr_t bits = (uintptr_t) t->is_rawptr()->get_con(); + return TypeX::make(bits); + } + return CastP2XNode::bottom_type(); +} + +Node *CastP2XNode::Ideal(PhaseGVN *phase, bool can_reshape) { + return (in(0) && remove_dead_region(phase, can_reshape)) ? this : NULL; +} + +//------------------------------Identity--------------------------------------- +Node *CastP2XNode::Identity( PhaseTransform *phase ) { + if (in(1)->Opcode() == Op_CastX2P) return in(1)->in(1); + return this; +} + + +//============================================================================= +//------------------------------Identity--------------------------------------- +// Remove redundant roundings +Node *RoundFloatNode::Identity( PhaseTransform *phase ) { + assert(Matcher::strict_fp_requires_explicit_rounding, "should only generate for Intel"); + // Do not round constants + if (phase->type(in(1))->base() == Type::FloatCon) return in(1); + int op = in(1)->Opcode(); + // Redundant rounding + if( op == Op_RoundFloat ) return in(1); + // Already rounded + if( op == Op_Parm ) return in(1); + if( op == Op_LoadF ) return in(1); + return this; +} + +//------------------------------Value------------------------------------------ +const Type *RoundFloatNode::Value( PhaseTransform *phase ) const { + return phase->type( in(1) ); +} + +//============================================================================= +//------------------------------Identity--------------------------------------- +// Remove redundant roundings. Incoming arguments are already rounded. +Node *RoundDoubleNode::Identity( PhaseTransform *phase ) { + assert(Matcher::strict_fp_requires_explicit_rounding, "should only generate for Intel"); + // Do not round constants + if (phase->type(in(1))->base() == Type::DoubleCon) return in(1); + int op = in(1)->Opcode(); + // Redundant rounding + if( op == Op_RoundDouble ) return in(1); + // Already rounded + if( op == Op_Parm ) return in(1); + if( op == Op_LoadD ) return in(1); + if( op == Op_ConvF2D ) return in(1); + if( op == Op_ConvI2D ) return in(1); + return this; +} + +//------------------------------Value------------------------------------------ +const Type *RoundDoubleNode::Value( PhaseTransform *phase ) const { + return phase->type( in(1) ); +} + + +//============================================================================= +// Do not allow value-numbering +uint Opaque1Node::hash() const { return NO_HASH; } +uint Opaque1Node::cmp( const Node &n ) const { + return (&n == this); // Always fail except on self +} + +//------------------------------Identity--------------------------------------- +// If _major_progress, then more loop optimizations follow. Do NOT remove +// the opaque Node until no more loop ops can happen. Note the timing of +// _major_progress; it's set in the major loop optimizations THEN comes the +// call to IterGVN and any chance of hitting this code. Hence there's no +// phase-ordering problem with stripping Opaque1 in IGVN followed by some +// more loop optimizations that require it. +Node *Opaque1Node::Identity( PhaseTransform *phase ) { + return phase->C->major_progress() ? this : in(1); +} + +//============================================================================= +// A node to prevent unwanted optimizations. Allows constant folding. Stops +// value-numbering, most Ideal calls or Identity functions. This Node is +// specifically designed to prevent the pre-increment value of a loop trip +// counter from being live out of the bottom of the loop (hence causing the +// pre- and post-increment values both being live and thus requiring an extra +// temp register and an extra move). If we "accidentally" optimize through +// this kind of a Node, we'll get slightly pessimal, but correct, code. Thus +// it's OK to be slightly sloppy on optimizations here. + +// Do not allow value-numbering +uint Opaque2Node::hash() const { return NO_HASH; } +uint Opaque2Node::cmp( const Node &n ) const { + return (&n == this); // Always fail except on self +} + + +//------------------------------Value------------------------------------------ +const Type *MoveL2DNode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + const TypeLong *tl = t->is_long(); + if( !tl->is_con() ) return bottom_type(); + JavaValue v; + v.set_jlong(tl->get_con()); + return TypeD::make( v.get_jdouble() ); +} + +//------------------------------Value------------------------------------------ +const Type *MoveI2FNode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + const TypeInt *ti = t->is_int(); + if( !ti->is_con() ) return bottom_type(); + JavaValue v; + v.set_jint(ti->get_con()); + return TypeF::make( v.get_jfloat() ); +} + +//------------------------------Value------------------------------------------ +const Type *MoveF2INode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + if( t == Type::FLOAT ) return TypeInt::INT; + const TypeF *tf = t->is_float_constant(); + JavaValue v; + v.set_jfloat(tf->getf()); + return TypeInt::make( v.get_jint() ); +} + +//------------------------------Value------------------------------------------ +const Type *MoveD2LNode::Value( PhaseTransform *phase ) const { + const Type *t = phase->type( in(1) ); + if( t == Type::TOP ) return Type::TOP; + if( t == Type::DOUBLE ) return TypeLong::LONG; + const TypeD *td = t->is_double_constant(); + JavaValue v; + v.set_jdouble(td->getd()); + return TypeLong::make( v.get_jlong() ); +}