truffle: src/share/vm/adlc/formssel.cpp comparison

comparison src/share/vm/adlc/formssel.cpp @ 0:a61af66fc99e jdk7-b24

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author	duke
date	Sat, 01 Dec 2007 00:00:00 +0000
parents
children	ba764ed4b6f2

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+:a61af66fc99e
+/*
+* Copyright 1998-2007 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.
+*
+*/
+// FORMS.CPP - Definitions for ADL Parser Forms Classes
+#include "adlc.hpp"
+//==============================Instructions===================================
+//------------------------------InstructForm-----------------------------------
+InstructForm::InstructForm(const char *id, bool ideal_only)
+: _ident(id), _ideal_only(ideal_only),
+_localNames(cmpstr, hashstr, Form::arena),
+_effects(cmpstr, hashstr, Form::arena) {
+_ftype = Form::INS;
+_matrule   = NULL;
+_insencode = NULL;
+_opcode    = NULL;
+_size      = NULL;
+_attribs   = NULL;
+_predicate = NULL;
+_exprule   = NULL;
+_rewrule   = NULL;
+_format    = NULL;
+_peephole  = NULL;
+_ins_pipe  = NULL;
+_uniq_idx  = NULL;
+_num_uniq  = 0;
+_cisc_spill_operand = Not_cisc_spillable;// Which operand may cisc-spill
+_cisc_spill_alternate = NULL;            // possible cisc replacement
+_cisc_reg_mask_name = NULL;
+_is_cisc_alternate = false;
+_is_short_branch = false;
+_short_branch_form = NULL;
+_alignment = 1;
+}
+InstructForm::InstructForm(const char *id, InstructForm *instr, MatchRule *rule)
+: _ident(id), _ideal_only(false),
+_localNames(instr->_localNames),
+_effects(instr->_effects) {
+_ftype = Form::INS;
+_matrule   = rule;
+_insencode = instr->_insencode;
+_opcode    = instr->_opcode;
+_size      = instr->_size;
+_attribs   = instr->_attribs;
+_predicate = instr->_predicate;
+_exprule   = instr->_exprule;
+_rewrule   = instr->_rewrule;
+_format    = instr->_format;
+_peephole  = instr->_peephole;
+_ins_pipe  = instr->_ins_pipe;
+_uniq_idx  = instr->_uniq_idx;
+_num_uniq  = instr->_num_uniq;
+_cisc_spill_operand = Not_cisc_spillable;// Which operand may cisc-spill
+_cisc_spill_alternate = NULL;            // possible cisc replacement
+_cisc_reg_mask_name = NULL;
+_is_cisc_alternate = false;
+_is_short_branch = false;
+_short_branch_form = NULL;
+_alignment = 1;
+// Copy parameters
+const char *name;
+instr->_parameters.reset();
+for (; (name = instr->_parameters.iter()) != NULL;)
+_parameters.addName(name);
+}
+InstructForm::~InstructForm() {
+}
+InstructForm *InstructForm::is_instruction() const {
+return (InstructForm*)this;
+}
+bool InstructForm::ideal_only() const {
+return _ideal_only;
+}
+bool InstructForm::sets_result() const {
+return (_matrule != NULL && _matrule->sets_result());
+}
+bool InstructForm::needs_projections() {
+_components.reset();
+for( Component *comp; (comp = _components.iter()) != NULL; ) {
+if (comp->isa(Component::KILL)) {
+return true;
+}
+}
+return false;
+}
+bool InstructForm::has_temps() {
+if (_matrule) {
+// Examine each component to see if it is a TEMP
+_components.reset();
+// Skip the first component, if already handled as (SET dst (...))
+Component *comp = NULL;
+if (sets_result())  comp = _components.iter();
+while ((comp = _components.iter()) != NULL) {
+if (comp->isa(Component::TEMP)) {
+return true;
+}
+}
+}
+return false;
+}
+uint InstructForm::num_defs_or_kills() {
+uint   defs_or_kills = 0;
+_components.reset();
+for( Component *comp; (comp = _components.iter()) != NULL; ) {
+if( comp->isa(Component::DEF) || comp->isa(Component::KILL) ) {
+++defs_or_kills;
+}
+}
+return  defs_or_kills;
+}
+// This instruction has an expand rule?
+bool InstructForm::expands() const {
+return ( _exprule != NULL );
+}
+// This instruction has a peephole rule?
+Peephole *InstructForm::peepholes() const {
+return _peephole;
+}
+// This instruction has a peephole rule?
+void InstructForm::append_peephole(Peephole *peephole) {
+if( _peephole == NULL ) {
+_peephole = peephole;
+} else {
+_peephole->append_peephole(peephole);
+}
+}
+// ideal opcode enumeration
+const char *InstructForm::ideal_Opcode( FormDict &globalNames )  const {
+if( !_matrule ) return "Node"; // Something weird
+// Chain rules do not really have ideal Opcodes; use their source
+// operand ideal Opcode instead.
+if( is_simple_chain_rule(globalNames) ) {
+const char *src = _matrule->_rChild->_opType;
+OperandForm *src_op = globalNames[src]->is_operand();
+assert( src_op, "Not operand class of chain rule" );
+if( !src_op->_matrule ) return "Node";
+return src_op->_matrule->_opType;
+}
+// Operand chain rules do not really have ideal Opcodes
+if( _matrule->is_chain_rule(globalNames) )
+return "Node";
+return strcmp(_matrule->_opType,"Set")
+? _matrule->_opType
+: _matrule->_rChild->_opType;
+}
+// Recursive check on all operands' match rules in my match rule
+bool InstructForm::is_pinned(FormDict &globals) {
+if ( ! _matrule)  return false;
+int  index   = 0;
+if (_matrule->find_type("Goto",          index)) return true;
+if (_matrule->find_type("If",            index)) return true;
+if (_matrule->find_type("CountedLoopEnd",index)) return true;
+if (_matrule->find_type("Return",        index)) return true;
+if (_matrule->find_type("Rethrow",       index)) return true;
+if (_matrule->find_type("TailCall",      index)) return true;
+if (_matrule->find_type("TailJump",      index)) return true;
+if (_matrule->find_type("Halt",          index)) return true;
+if (_matrule->find_type("Jump",          index)) return true;
+return is_parm(globals);
+}
+// Recursive check on all operands' match rules in my match rule
+bool InstructForm::is_projection(FormDict &globals) {
+if ( ! _matrule)  return false;
+int  index   = 0;
+if (_matrule->find_type("Goto",    index)) return true;
+if (_matrule->find_type("Return",  index)) return true;
+if (_matrule->find_type("Rethrow", index)) return true;
+if (_matrule->find_type("TailCall",index)) return true;
+if (_matrule->find_type("TailJump",index)) return true;
+if (_matrule->find_type("Halt",    index)) return true;
+return false;
+}
+// Recursive check on all operands' match rules in my match rule
+bool InstructForm::is_parm(FormDict &globals) {
+if ( ! _matrule)  return false;
+int  index   = 0;
+if (_matrule->find_type("Parm",index)) return true;
+return false;
+}
+// Return 'true' if this instruction matches an ideal 'Copy*' node
+int InstructForm::is_ideal_copy() const {
+return _matrule ? _matrule->is_ideal_copy() : 0;
+}
+// Return 'true' if this instruction is too complex to rematerialize.
+int InstructForm::is_expensive() const {
+// We can prove it is cheap if it has an empty encoding.
+// This helps with platform-specific nops like ThreadLocal and RoundFloat.
+if (is_empty_encoding())
+return 0;
+if (is_tls_instruction())
+return 1;
+if (_matrule == NULL)  return 0;
+return _matrule->is_expensive();
+}
+// Has an empty encoding if _size is a constant zero or there
+// are no ins_encode tokens.
+int InstructForm::is_empty_encoding() const {
+if (_insencode != NULL) {
+_insencode->reset();
+if (_insencode->encode_class_iter() == NULL) {
+return 1;
+}
+}
+if (_size != NULL && strcmp(_size, "0") == 0) {
+return 1;
+}
+return 0;
+}
+int InstructForm::is_tls_instruction() const {
+if (_ident != NULL &&
+( ! strcmp( _ident,"tlsLoadP") ||
+! strncmp(_ident,"tlsLoadP_",9)) ) {
+return 1;
+}
+if (_matrule != NULL && _insencode != NULL) {
+const char* opType = _matrule->_opType;
+if (strcmp(opType, "Set")==0)
+opType = _matrule->_rChild->_opType;
+if (strcmp(opType,"ThreadLocal")==0) {
+fprintf(stderr, "Warning: ThreadLocal instruction %s should be named 'tlsLoadP_*'\n",
+(_ident == NULL ? "NULL" : _ident));
+return 1;
+}
+}
+return 0;
+}
+// Return 'true' if this instruction matches an ideal 'Copy*' node
+bool InstructForm::is_ideal_unlock() const {
+return _matrule ? _matrule->is_ideal_unlock() : false;
+}
+bool InstructForm::is_ideal_call_leaf() const {
+return _matrule ? _matrule->is_ideal_call_leaf() : false;
+}
+// Return 'true' if this instruction matches an ideal 'If' node
+bool InstructForm::is_ideal_if() const {
+if( _matrule == NULL ) return false;
+return _matrule->is_ideal_if();
+}
+// Return 'true' if this instruction matches an ideal 'FastLock' node
+bool InstructForm::is_ideal_fastlock() const {
+if( _matrule == NULL ) return false;
+return _matrule->is_ideal_fastlock();
+}
+// Return 'true' if this instruction matches an ideal 'MemBarXXX' node
+bool InstructForm::is_ideal_membar() const {
+if( _matrule == NULL ) return false;
+return _matrule->is_ideal_membar();
+}
+// Return 'true' if this instruction matches an ideal 'LoadPC' node
+bool InstructForm::is_ideal_loadPC() const {
+if( _matrule == NULL ) return false;
+return _matrule->is_ideal_loadPC();
+}
+// Return 'true' if this instruction matches an ideal 'Box' node
+bool InstructForm::is_ideal_box() const {
+if( _matrule == NULL ) return false;
+return _matrule->is_ideal_box();
+}
+// Return 'true' if this instruction matches an ideal 'Goto' node
+bool InstructForm::is_ideal_goto() const {
+if( _matrule == NULL ) return false;
+return _matrule->is_ideal_goto();
+}
+// Return 'true' if this instruction matches an ideal 'Jump' node
+bool InstructForm::is_ideal_jump() const {
+if( _matrule == NULL ) return false;
+return _matrule->is_ideal_jump();
+}
+// Return 'true' if instruction matches ideal 'If' | 'Goto' |
+//                    'CountedLoopEnd' | 'Jump'
+bool InstructForm::is_ideal_branch() const {
+if( _matrule == NULL ) return false;
+return _matrule->is_ideal_if() || _matrule->is_ideal_goto() || _matrule->is_ideal_jump();
+}
+// Return 'true' if this instruction matches an ideal 'Return' node
+bool InstructForm::is_ideal_return() const {
+if( _matrule == NULL ) return false;
+// Check MatchRule to see if the first entry is the ideal "Return" node
+int  index   = 0;
+if (_matrule->find_type("Return",index)) return true;
+if (_matrule->find_type("Rethrow",index)) return true;
+if (_matrule->find_type("TailCall",index)) return true;
+if (_matrule->find_type("TailJump",index)) return true;
+return false;
+}
+// Return 'true' if this instruction matches an ideal 'Halt' node
+bool InstructForm::is_ideal_halt() const {
+int  index   = 0;
+return _matrule && _matrule->find_type("Halt",index);
+}
+// Return 'true' if this instruction matches an ideal 'SafePoint' node
+bool InstructForm::is_ideal_safepoint() const {
+int  index   = 0;
+return _matrule && _matrule->find_type("SafePoint",index);
+}
+// Return 'true' if this instruction matches an ideal 'Nop' node
+bool InstructForm::is_ideal_nop() const {
+return _ident && _ident[0] == 'N' && _ident[1] == 'o' && _ident[2] == 'p' && _ident[3] == '_';
+}
+bool InstructForm::is_ideal_control() const {
+if ( ! _matrule)  return false;
+return is_ideal_return() || is_ideal_branch() || is_ideal_halt();
+}
+// Return 'true' if this instruction matches an ideal 'Call' node
+Form::CallType InstructForm::is_ideal_call() const {
+if( _matrule == NULL ) return Form::invalid_type;
+// Check MatchRule to see if the first entry is the ideal "Call" node
+int  idx   = 0;
+if(_matrule->find_type("CallStaticJava",idx))   return Form::JAVA_STATIC;
+idx = 0;
+if(_matrule->find_type("Lock",idx))             return Form::JAVA_STATIC;
+idx = 0;
+if(_matrule->find_type("Unlock",idx))           return Form::JAVA_STATIC;
+idx = 0;
+if(_matrule->find_type("CallDynamicJava",idx))  return Form::JAVA_DYNAMIC;
+idx = 0;
+if(_matrule->find_type("CallRuntime",idx))      return Form::JAVA_RUNTIME;
+idx = 0;
+if(_matrule->find_type("CallLeaf",idx))         return Form::JAVA_LEAF;
+idx = 0;
+if(_matrule->find_type("CallLeafNoFP",idx))     return Form::JAVA_LEAF;
+idx = 0;
+return Form::invalid_type;
+}
+// Return 'true' if this instruction matches an ideal 'Load?' node
+Form::DataType InstructForm::is_ideal_load() const {
+if( _matrule == NULL ) return Form::none;
+return  _matrule->is_ideal_load();
+}
+// Return 'true' if this instruction matches an ideal 'Load?' node
+Form::DataType InstructForm::is_ideal_store() const {
+if( _matrule == NULL ) return Form::none;
+return  _matrule->is_ideal_store();
+}
+// Return the input register that must match the output register
+// If this is not required, return 0
+uint InstructForm::two_address(FormDict &globals) {
+uint  matching_input = 0;
+if(_components.count() == 0) return 0;
+_components.reset();
+Component *comp = _components.iter();
+// Check if there is a DEF
+if( comp->isa(Component::DEF) ) {
+// Check that this is a register
+const char  *def_type = comp->_type;
+const Form  *form     = globals[def_type];
+OperandForm *op       = form->is_operand();
+if( op ) {
+if( op->constrained_reg_class() != NULL &&
+op->interface_type(globals) == Form::register_interface ) {
+// Remember the local name for equality test later
+const char *def_name = comp->_name;
+// Check if a component has the same name and is a USE
+do {
+if( comp->isa(Component::USE) && strcmp(comp->_name,def_name)==0 ) {
+return operand_position_format(def_name);
+}
+} while( (comp = _components.iter()) != NULL);
+}
+}
+}
+return 0;
+}
+// when chaining a constant to an instruction, returns 'true' and sets opType
+Form::DataType InstructForm::is_chain_of_constant(FormDict &globals) {
+const char *dummy  = NULL;
+const char *dummy2 = NULL;
+return is_chain_of_constant(globals, dummy, dummy2);
+}
+Form::DataType InstructForm::is_chain_of_constant(FormDict &globals,
+const char * &opTypeParam) {
+const char *result = NULL;
+return is_chain_of_constant(globals, opTypeParam, result);
+}
+Form::DataType InstructForm::is_chain_of_constant(FormDict &globals,
+const char * &opTypeParam, const char * &resultParam) {
+Form::DataType  data_type = Form::none;
+if ( ! _matrule)  return data_type;
+// !!!!!
+// The source of the chain rule is 'position = 1'
+uint         position = 1;
+const char  *result   = NULL;
+const char  *name     = NULL;
+const char  *opType   = NULL;
+// Here base_operand is looking for an ideal type to be returned (opType).
+if ( _matrule->is_chain_rule(globals)
+&& _matrule->base_operand(position, globals, result, name, opType) ) {
+data_type = ideal_to_const_type(opType);
+// if it isn't an ideal constant type, just return
+if ( data_type == Form::none ) return data_type;
+// Ideal constant types also adjust the opType parameter.
+resultParam = result;
+opTypeParam = opType;
+return data_type;
+}
+return data_type;
+}
+// Check if a simple chain rule
+bool InstructForm::is_simple_chain_rule(FormDict &globals) const {
+if( _matrule && _matrule->sets_result()
+&& _matrule->_rChild->_lChild == NULL
+&& globals[_matrule->_rChild->_opType]
+&& globals[_matrule->_rChild->_opType]->is_opclass() ) {
+return true;
+}
+return false;
+}
+// check for structural rematerialization
+bool InstructForm::rematerialize(FormDict &globals, RegisterForm *registers ) {
+bool   rematerialize = false;
+Form::DataType data_type = is_chain_of_constant(globals);
+if( data_type != Form::none )
+rematerialize = true;
+// Constants
+if( _components.count() == 1 && _components[0]->is(Component::USE_DEF) )
+rematerialize = true;
+// Pseudo-constants (values easily available to the runtime)
+if (is_empty_encoding() && is_tls_instruction())
+rematerialize = true;
+// 1-input, 1-output, such as copies or increments.
+if( _components.count() == 2 &&
+_components[0]->is(Component::DEF) &&
+_components[1]->isa(Component::USE) )
+rematerialize = true;
+// Check for an ideal 'Load?' and eliminate rematerialize option
+if ( is_ideal_load() != Form::none || // Ideal load?  Do not rematerialize
+is_ideal_copy() != Form::none || // Ideal copy?  Do not rematerialize
+is_expensive()  != Form::none) { // Expensive?   Do not rematerialize
+rematerialize = false;
+}
+// Always rematerialize the flags.  They are more expensive to save &
+// restore than to recompute (and possibly spill the compare's inputs).
+if( _components.count() >= 1 ) {
+Component *c = _components[0];
+const Form *form = globals[c->_type];
+OperandForm *opform = form->is_operand();
+if( opform ) {
+// Avoid the special stack_slots register classes
+const char *rc_name = opform->constrained_reg_class();
+if( rc_name ) {
+if( strcmp(rc_name,"stack_slots") ) {
+// Check for ideal_type of RegFlags
+const char *type = opform->ideal_type( globals, registers );
+if( !strcmp(type,"RegFlags") )
+rematerialize = true;
+} else
+rematerialize = false; // Do not rematerialize things target stk
+}
+}
+}
+return rematerialize;
+}
+// loads from memory, so must check for anti-dependence
+bool InstructForm::needs_anti_dependence_check(FormDict &globals) const {
+// Machine independent loads must be checked for anti-dependences
+if( is_ideal_load() != Form::none )  return true;
+// !!!!! !!!!! !!!!!
+// TEMPORARY
+// if( is_simple_chain_rule(globals) )  return false;
+// String-compare uses many memorys edges, but writes none
+if( _matrule && _matrule->_rChild &&
+strcmp(_matrule->_rChild->_opType,"StrComp")==0 )
+return true;
+// Check if instruction has a USE of a memory operand class, but no defs
+bool USE_of_memory  = false;
+bool DEF_of_memory  = false;
+Component     *comp = NULL;
+ComponentList &components = (ComponentList &)_components;
+components.reset();
+while( (comp = components.iter()) != NULL ) {
+const Form  *form = globals[comp->_type];
+if( !form ) continue;
+OpClassForm *op   = form->is_opclass();
+if( !op ) continue;
+if( form->interface_type(globals) == Form::memory_interface ) {
+if( comp->isa(Component::USE) ) USE_of_memory = true;
+if( comp->isa(Component::DEF) ) {
+OperandForm *oper = form->is_operand();
+if( oper && oper->is_user_name_for_sReg() ) {
+// Stack slots are unaliased memory handled by allocator
+oper = oper;  // debug stopping point !!!!!
+} else {
+DEF_of_memory = true;
+}
+}
+}
+}
+return (USE_of_memory && !DEF_of_memory);
+}
+bool InstructForm::is_wide_memory_kill(FormDict &globals) const {
+if( _matrule == NULL ) return false;
+if( !_matrule->_opType ) return false;
+if( strcmp(_matrule->_opType,"MemBarRelease") == 0 ) return true;
+if( strcmp(_matrule->_opType,"MemBarAcquire") == 0 ) return true;
+return false;
+}
+int InstructForm::memory_operand(FormDict &globals) const {
+// Machine independent loads must be checked for anti-dependences
+// Check if instruction has a USE of a memory operand class, or a def.
+int USE_of_memory  = 0;
+int DEF_of_memory  = 0;
+const char*    last_memory_DEF = NULL; // to test DEF/USE pairing in asserts
+Component     *unique          = NULL;
+Component     *comp            = NULL;
+ComponentList &components      = (ComponentList &)_components;
+components.reset();
+while( (comp = components.iter()) != NULL ) {
+const Form  *form = globals[comp->_type];
+if( !form ) continue;
+OpClassForm *op   = form->is_opclass();
+if( !op ) continue;
+if( op->stack_slots_only(globals) )  continue;
+if( form->interface_type(globals) == Form::memory_interface ) {
+if( comp->isa(Component::DEF) ) {
+last_memory_DEF = comp->_name;
+DEF_of_memory++;
+unique = comp;
+} else if( comp->isa(Component::USE) ) {
+if( last_memory_DEF != NULL ) {
+assert(0 == strcmp(last_memory_DEF, comp->_name), "every memory DEF is followed by a USE of the same name");
+last_memory_DEF = NULL;
+}
+USE_of_memory++;
+if (DEF_of_memory == 0)  // defs take precedence
+unique = comp;
+} else {
+assert(last_memory_DEF == NULL, "unpaired memory DEF");
+}
+}
+}
+assert(last_memory_DEF == NULL, "unpaired memory DEF");
+assert(USE_of_memory >= DEF_of_memory, "unpaired memory DEF");
+USE_of_memory -= DEF_of_memory;   // treat paired DEF/USE as one occurrence
+if( (USE_of_memory + DEF_of_memory) > 0 ) {
+if( is_simple_chain_rule(globals) ) {
+//fprintf(stderr, "Warning: chain rule is not really a memory user.\n");
+//((InstructForm*)this)->dump();
+// Preceding code prints nothing on sparc and these insns on intel:
+// leaP8 leaP32 leaPIdxOff leaPIdxScale leaPIdxScaleOff leaP8 leaP32
+// leaPIdxOff leaPIdxScale leaPIdxScaleOff
+return NO_MEMORY_OPERAND;
+}
+if( DEF_of_memory == 1 ) {
+assert(unique != NULL, "");
+if( USE_of_memory == 0 ) {
+// unique def, no uses
+} else {
+// // unique def, some uses
+// // must return bottom unless all uses match def
+// unique = NULL;
+}
+} else if( DEF_of_memory > 0 ) {
+// multiple defs, don't care about uses
+unique = NULL;
+} else if( USE_of_memory == 1) {
+// unique use, no defs
+assert(unique != NULL, "");
+} else if( USE_of_memory > 0 ) {
+// multiple uses, no defs
+unique = NULL;
+} else {
+assert(false, "bad case analysis");
+}
+// process the unique DEF or USE, if there is one
+if( unique == NULL ) {
+return MANY_MEMORY_OPERANDS;
+} else {
+int pos = components.operand_position(unique->_name);
+if( unique->isa(Component::DEF) ) {
+pos += 1;                // get corresponding USE from DEF
+}
+assert(pos >= 1, "I was just looking at it!");
+return pos;
+}
+}
+// missed the memory op??
+if( true ) {  // %%% should not be necessary
+if( is_ideal_store() != Form::none ) {
+fprintf(stderr, "Warning: cannot find memory opnd in instr.\n");
+((InstructForm*)this)->dump();
+// pretend it has multiple defs and uses
+return MANY_MEMORY_OPERANDS;
+}
+if( is_ideal_load()  != Form::none ) {
+fprintf(stderr, "Warning: cannot find memory opnd in instr.\n");
+((InstructForm*)this)->dump();
+// pretend it has multiple uses and no defs
+return MANY_MEMORY_OPERANDS;
+}
+}
+return NO_MEMORY_OPERAND;
+}
+// This instruction captures the machine-independent bottom_type
+// Expected use is for pointer vs oop determination for LoadP
+bool InstructForm::captures_bottom_type() const {
+if( _matrule && _matrule->_rChild &&
+(!strcmp(_matrule->_rChild->_opType,"CastPP")     ||  // new result type
+!strcmp(_matrule->_rChild->_opType,"CastX2P")    ||  // new result type
+!strcmp(_matrule->_rChild->_opType,"CreateEx")   ||  // type of exception
+!strcmp(_matrule->_rChild->_opType,"CheckCastPP")) ) return true;
+else if ( is_ideal_load() == Form::idealP )                return true;
+else if ( is_ideal_store() != Form::none  )                return true;
+return  false;
+}
+// Access instr_cost attribute or return NULL.
+const char* InstructForm::cost() {
+for (Attribute* cur = _attribs; cur != NULL; cur = (Attribute*)cur->_next) {
+if( strcmp(cur->_ident,AttributeForm::_ins_cost) == 0 ) {
+return cur->_val;
+}
+}
+return NULL;
+}
+// Return count of top-level operands.
+uint InstructForm::num_opnds() {
+int  num_opnds = _components.num_operands();
+// Need special handling for matching some ideal nodes
+// i.e. Matching a return node
+/*
+if( _matrule ) {
+if( strcmp(_matrule->_opType,"Return"   )==0 ||
+strcmp(_matrule->_opType,"Halt"     )==0 )
+return 3;
+}
+*/
+return num_opnds;
+}
+// Return count of unmatched operands.
+uint InstructForm::num_post_match_opnds() {
+uint  num_post_match_opnds = _components.count();
+uint  num_match_opnds = _components.match_count();
+num_post_match_opnds = num_post_match_opnds - num_match_opnds;
+return num_post_match_opnds;
+}
+// Return the number of leaves below this complex operand
+uint InstructForm::num_consts(FormDict &globals) const {
+if ( ! _matrule) return 0;
+// This is a recursive invocation on all operands in the matchrule
+return _matrule->num_consts(globals);
+}
+// Constants in match rule with specified type
+uint InstructForm::num_consts(FormDict &globals, Form::DataType type) const {
+if ( ! _matrule) return 0;
+// This is a recursive invocation on all operands in the matchrule
+return _matrule->num_consts(globals, type);
+}
+// Return the register class associated with 'leaf'.
+const char *InstructForm::out_reg_class(FormDict &globals) {
+assert( false, "InstructForm::out_reg_class(FormDict &globals); Not Implemented");
+return NULL;
+}
+// Lookup the starting position of inputs we are interested in wrt. ideal nodes
+uint InstructForm::oper_input_base(FormDict &globals) {
+if( !_matrule ) return 1;     // Skip control for most nodes
+// Need special handling for matching some ideal nodes
+// i.e. Matching a return node
+if( strcmp(_matrule->_opType,"Return"    )==0 ||
+strcmp(_matrule->_opType,"Rethrow"   )==0 ||
+strcmp(_matrule->_opType,"TailCall"  )==0 ||
+strcmp(_matrule->_opType,"TailJump"  )==0 ||
+strcmp(_matrule->_opType,"SafePoint" )==0 ||
+strcmp(_matrule->_opType,"Halt"      )==0 )
+return AdlcVMDeps::Parms;   // Skip the machine-state edges
+if( _matrule->_rChild &&
+strcmp(_matrule->_rChild->_opType,"StrComp")==0 ) {
+// String compare takes 1 control and 4 memory edges.
+return 5;
+}
+// Check for handling of 'Memory' input/edge in the ideal world.
+// The AD file writer is shielded from knowledge of these edges.
+int base = 1;                 // Skip control
+base += _matrule->needs_ideal_memory_edge(globals);
+// Also skip the base-oop value for uses of derived oops.
+// The AD file writer is shielded from knowledge of these edges.
+base += needs_base_oop_edge(globals);
+return base;
+}
+// Implementation does not modify state of internal structures
+void InstructForm::build_components() {
+// Add top-level operands to the components
+if (_matrule)  _matrule->append_components(_localNames, _components);
+// Add parameters that "do not appear in match rule".
+bool has_temp = false;
+const char *name;
+const char *kill_name = NULL;
+for (_parameters.reset(); (name = _parameters.iter()) != NULL;) {
+OperandForm *opForm = (OperandForm*)_localNames[name];
+const Form *form = _effects[name];
+Effect     *e    = form ? form->is_effect() : NULL;
+if (e != NULL) {
+has_temp |= e->is(Component::TEMP);
+// KILLs must be declared after any TEMPs because TEMPs are real
+// uses so their operand numbering must directly follow the real
+// inputs from the match rule.  Fixing the numbering seems
+// complex so simply enforce the restriction during parse.
+if (kill_name != NULL &&
+e->isa(Component::TEMP) && !e->isa(Component::DEF)) {
+OperandForm* kill = (OperandForm*)_localNames[kill_name];
+globalAD->syntax_err(_linenum, "%s: %s %s must be at the end of the argument list\n",
+_ident, kill->_ident, kill_name);
+} else if (e->isa(Component::KILL)) {
+kill_name = name;
+}
+// TEMPs are real uses and need to be among the first parameters
+// listed, otherwise the numbering of operands and inputs gets
+// screwy, so enforce this restriction during parse.
+if (kill_name != NULL &&
+e->isa(Component::TEMP) && !e->isa(Component::DEF)) {
+OperandForm* kill = (OperandForm*)_localNames[kill_name];
+globalAD->syntax_err(_linenum, "%s: %s %s must follow %s %s in the argument list\n",
+_ident, kill->_ident, kill_name, opForm->_ident, name);
+} else if (e->isa(Component::KILL)) {
+kill_name = name;
+}
+}
+const Component *component  = _components.search(name);
+if ( component  == NULL ) {
+if (e) {
+_components.insert(name, opForm->_ident, e->_use_def, false);
+component = _components.search(name);
+if (component->isa(Component::USE) && !component->isa(Component::TEMP) && _matrule) {
+const Form *form = globalAD->globalNames()[component->_type];
+assert( form, "component type must be a defined form");
+OperandForm *op   = form->is_operand();
+if (op->_interface && op->_interface->is_RegInterface()) {
+globalAD->syntax_err(_linenum, "%s: illegal USE of non-input: %s %s\n",
+_ident, opForm->_ident, name);
+}
+}
+} else {
+// This would be a nice warning but it triggers in a few places in a benign way
+// if (_matrule != NULL && !expands()) {
+//   globalAD->syntax_err(_linenum, "%s: %s %s not mentioned in effect or match rule\n",
+//                        _ident, opForm->_ident, name);
+// }
+_components.insert(name, opForm->_ident, Component::INVALID, false);
+}
+}
+else if (e) {
+// Component was found in the list
+// Check if there is a new effect that requires an extra component.
+// This happens when adding 'USE' to a component that is not yet one.
+if ((!component->isa( Component::USE) && ((e->_use_def & Component::USE) != 0))) {
+if (component->isa(Component::USE) && _matrule) {
+const Form *form = globalAD->globalNames()[component->_type];
+assert( form, "component type must be a defined form");
+OperandForm *op   = form->is_operand();
+if (op->_interface && op->_interface->is_RegInterface()) {
+globalAD->syntax_err(_linenum, "%s: illegal USE of non-input: %s %s\n",
+_ident, opForm->_ident, name);
+}
+}
+_components.insert(name, opForm->_ident, e->_use_def, false);
+} else {
+Component  *comp = (Component*)component;
+comp->promote_use_def_info(e->_use_def);
+}
+// Component positions are zero based.
+int  pos  = _components.operand_position(name);
+assert( ! (component->isa(Component::DEF) && (pos >= 1)),
+"Component::DEF can only occur in the first position");
+}
+}
+// Resolving the interactions between expand rules and TEMPs would
+// be complex so simply disallow it.
+if (_matrule == NULL && has_temp) {
+globalAD->syntax_err(_linenum, "%s: TEMPs without match rule isn't supported\n", _ident);
+}
+return;
+}
+// Return zero-based position in component list;  -1 if not in list.
+int   InstructForm::operand_position(const char *name, int usedef) {
+return unique_opnds_idx(_components.operand_position(name, usedef));
+}
+int   InstructForm::operand_position_format(const char *name) {
+return unique_opnds_idx(_components.operand_position_format(name));
+}
+// Return zero-based position in component list; -1 if not in list.
+int   InstructForm::label_position() {
+return unique_opnds_idx(_components.label_position());
+}
+int   InstructForm::method_position() {
+return unique_opnds_idx(_components.method_position());
+}
+// Return number of relocation entries needed for this instruction.
+uint  InstructForm::reloc(FormDict &globals) {
+uint reloc_entries  = 0;
+// Check for "Call" nodes
+if ( is_ideal_call() )      ++reloc_entries;
+if ( is_ideal_return() )    ++reloc_entries;
+if ( is_ideal_safepoint() ) ++reloc_entries;
+// Check if operands MAYBE oop pointers, by checking for ConP elements
+// Proceed through the leaves of the match-tree and check for ConPs
+if ( _matrule != NULL ) {
+uint         position = 0;
+const char  *result   = NULL;
+const char  *name     = NULL;
+const char  *opType   = NULL;
+while (_matrule->base_operand(position, globals, result, name, opType)) {
+if ( strcmp(opType,"ConP") == 0 ) {
+#ifdef SPARC
+reloc_entries += 2; // 1 for sethi + 1 for setlo
+#else
+++reloc_entries;
+#endif
+}
+++position;
+}
+}
+// Above is only a conservative estimate
+// because it did not check contents of operand classes.
+// !!!!! !!!!!
+// Add 1 to reloc info for each operand class in the component list.
+Component  *comp;
+_components.reset();
+while ( (comp = _components.iter()) != NULL ) {
+const Form        *form = globals[comp->_type];
+assert( form, "Did not find component's type in global names");
+const OpClassForm *opc  = form->is_opclass();
+const OperandForm *oper = form->is_operand();
+if ( opc && (oper == NULL) ) {
+++reloc_entries;
+} else if ( oper ) {
+// floats and doubles loaded out of method's constant pool require reloc info
+Form::DataType type = oper->is_base_constant(globals);
+if ( (type == Form::idealF) || (type == Form::idealD) ) {
+++reloc_entries;
+}
+}
+}
+// Float and Double constants may come from the CodeBuffer table
+// and require relocatable addresses for access
+// !!!!!
+// Check for any component being an immediate float or double.
+Form::DataType data_type = is_chain_of_constant(globals);
+if( data_type==idealD || data_type==idealF ) {
+#ifdef SPARC
+// sparc required more relocation entries for floating constants
+// (expires 9/98)
+reloc_entries += 6;
+#else
+reloc_entries++;
+#endif
+}
+return reloc_entries;
+}
+// Utility function defined in archDesc.cpp
+extern bool is_def(int usedef);
+// Return the result of reducing an instruction
+const char *InstructForm::reduce_result() {
+const char* result = "Universe";  // default
+_components.reset();
+Component *comp = _components.iter();
+if (comp != NULL && comp->isa(Component::DEF)) {
+result = comp->_type;
+// Override this if the rule is a store operation:
+if (_matrule && _matrule->_rChild &&
+is_store_to_memory(_matrule->_rChild->_opType))
+result = "Universe";
+}
+return result;
+}
+// Return the name of the operand on the right hand side of the binary match
+// Return NULL if there is no right hand side
+const char *InstructForm::reduce_right(FormDict &globals)  const {
+if( _matrule == NULL ) return NULL;
+return  _matrule->reduce_right(globals);
+}
+// Similar for left
+const char *InstructForm::reduce_left(FormDict &globals)   const {
+if( _matrule == NULL ) return NULL;
+return  _matrule->reduce_left(globals);
+}
+// Base class for this instruction, MachNode except for calls
+const char *InstructForm::mach_base_class()  const {
+if( is_ideal_call() == Form::JAVA_STATIC ) {
+return "MachCallStaticJavaNode";
+}
+else if( is_ideal_call() == Form::JAVA_DYNAMIC ) {
+return "MachCallDynamicJavaNode";
+}
+else if( is_ideal_call() == Form::JAVA_RUNTIME ) {
+return "MachCallRuntimeNode";
+}
+else if( is_ideal_call() == Form::JAVA_LEAF ) {
+return "MachCallLeafNode";
+}
+else if (is_ideal_return()) {
+return "MachReturnNode";
+}
+else if (is_ideal_halt()) {
+return "MachHaltNode";
+}
+else if (is_ideal_safepoint()) {
+return "MachSafePointNode";
+}
+else if (is_ideal_if()) {
+return "MachIfNode";
+}
+else if (is_ideal_fastlock()) {
+return "MachFastLockNode";
+}
+else if (is_ideal_nop()) {
+return "MachNopNode";
+}
+else if (captures_bottom_type()) {
+return "MachTypeNode";
+} else {
+return "MachNode";
+}
+assert( false, "ShouldNotReachHere()");
+return NULL;
+}
+// Compare the instruction predicates for textual equality
+bool equivalent_predicates( const InstructForm *instr1, const InstructForm *instr2 ) {
+const Predicate *pred1  = instr1->_predicate;
+const Predicate *pred2  = instr2->_predicate;
+if( pred1 == NULL && pred2 == NULL ) {
+// no predicates means they are identical
+return true;
+}
+if( pred1 != NULL && pred2 != NULL ) {
+// compare the predicates
+const char *str1 = pred1->_pred;
+const char *str2 = pred2->_pred;
+if( (str1 == NULL && str2 == NULL)
+|| (str1 != NULL && str2 != NULL && strcmp(str1,str2) == 0) ) {
+return true;
+}
+}
+return false;
+}
+// Check if this instruction can cisc-spill to 'alternate'
+bool InstructForm::cisc_spills_to(ArchDesc &AD, InstructForm *instr) {
+assert( _matrule != NULL && instr->_matrule != NULL, "must have match rules");
+// Do not replace if a cisc-version has been found.
+if( cisc_spill_operand() != Not_cisc_spillable ) return false;
+int         cisc_spill_operand = Maybe_cisc_spillable;
+char       *result             = NULL;
+char       *result2            = NULL;
+const char *op_name            = NULL;
+const char *reg_type           = NULL;
+FormDict   &globals            = AD.globalNames();
+cisc_spill_operand = _matrule->cisc_spill_match(globals, AD.get_registers(), instr->_matrule, op_name, reg_type);
+if( (cisc_spill_operand != Not_cisc_spillable) && (op_name != NULL) && equivalent_predicates(this, instr) ) {
+cisc_spill_operand = operand_position(op_name, Component::USE);
+int def_oper  = operand_position(op_name, Component::DEF);
+if( def_oper == NameList::Not_in_list && instr->num_opnds() == num_opnds()) {
+// Do not support cisc-spilling for destination operands and
+// make sure they have the same number of operands.
+_cisc_spill_alternate = instr;
+instr->set_cisc_alternate(true);
+if( AD._cisc_spill_debug ) {
+fprintf(stderr, "Instruction %s cisc-spills-to %s\n", _ident, instr->_ident);
+fprintf(stderr, "   using operand %s %s at index %d\n", reg_type, op_name, cisc_spill_operand);
+}
+// Record that a stack-version of the reg_mask is needed
+// !!!!!
+OperandForm *oper = (OperandForm*)(globals[reg_type]->is_operand());
+assert( oper != NULL, "cisc-spilling non operand");
+const char *reg_class_name = oper->constrained_reg_class();
+AD.set_stack_or_reg(reg_class_name);
+const char *reg_mask_name  = AD.reg_mask(*oper);
+set_cisc_reg_mask_name(reg_mask_name);
+const char *stack_or_reg_mask_name = AD.stack_or_reg_mask(*oper);
+} else {
+cisc_spill_operand = Not_cisc_spillable;
+}
+} else {
+cisc_spill_operand = Not_cisc_spillable;
+}
+set_cisc_spill_operand(cisc_spill_operand);
+return (cisc_spill_operand != Not_cisc_spillable);
+}
+// Check to see if this instruction can be replaced with the short branch
+// instruction `short-branch'
+bool InstructForm::check_branch_variant(ArchDesc &AD, InstructForm *short_branch) {
+if (_matrule != NULL &&
+this != short_branch &&   // Don't match myself
+!is_short_branch() &&     // Don't match another short branch variant
+reduce_result() != NULL &&
+strcmp(reduce_result(), short_branch->reduce_result()) == 0 &&
+_matrule->equivalent(AD.globalNames(), short_branch->_matrule)) {
+// The instructions are equivalent.
+if (AD._short_branch_debug) {
+fprintf(stderr, "Instruction %s has short form %s\n", _ident, short_branch->_ident);
+}
+_short_branch_form = short_branch;
+return true;
+}
+return false;
+}
+// --------------------------- FILE *output_routines
+//
+// Generate the format call for the replacement variable
+void InstructForm::rep_var_format(FILE *fp, const char *rep_var) {
+// Find replacement variable's type
+const Form *form   = _localNames[rep_var];
+if (form == NULL) {
+fprintf(stderr, "unknown replacement variable in format statement: '%s'\n", rep_var);
+assert(false, "ShouldNotReachHere()");
+}
+OpClassForm *opc   = form->is_opclass();
+assert( opc, "replacement variable was not found in local names");
+// Lookup the index position of the replacement variable
+int idx  = operand_position_format(rep_var);
+if ( idx == -1 ) {
+assert( strcmp(opc->_ident,"label")==0, "Unimplemented");
+assert( false, "ShouldNotReachHere()");
+}
+if (is_noninput_operand(idx)) {
+// This component isn't in the input array.  Print out the static
+// name of the register.
+OperandForm* oper = form->is_operand();
+if (oper != NULL && oper->is_bound_register()) {
+const RegDef* first = oper->get_RegClass()->find_first_elem();
+fprintf(fp, "    tty->print(\"%s\");\n", first->_regname);
+} else {
+globalAD->syntax_err(_linenum, "In %s can't find format for %s %s", _ident, opc->_ident, rep_var);
+}
+} else {
+// Output the format call for this operand
+fprintf(fp,"opnd_array(%d)->",idx);
+if (idx == 0)
+fprintf(fp,"int_format(ra, this, st); // %s\n", rep_var);
+else
+fprintf(fp,"ext_format(ra, this,idx%d, st); // %s\n", idx, rep_var );
+}
+}
+// Seach through operands to determine parameters unique positions.
+void InstructForm::set_unique_opnds() {
+uint* uniq_idx = NULL;
+uint  nopnds = num_opnds();
+uint  num_uniq = nopnds;
+uint i;
+if ( nopnds > 0 ) {
+// Allocate index array with reserve.
+uniq_idx = (uint*) malloc(sizeof(uint)*(nopnds + 2));
+for( i = 0; i < nopnds+2; i++ ) {
+uniq_idx[i] = i;
+}
+}
+// Do it only if there is a match rule and no expand rule.  With an
+// expand rule it is done by creating new mach node in Expand()
+// method.
+if ( nopnds > 0 && _matrule != NULL && _exprule == NULL ) {
+const char *name;
+uint count;
+bool has_dupl_use = false;
+_parameters.reset();
+while( (name = _parameters.iter()) != NULL ) {
+count = 0;
+uint position = 0;
+uint uniq_position = 0;
+_components.reset();
+Component *comp = NULL;
+if( sets_result() ) {
+comp = _components.iter();
+position++;
+}
+// The next code is copied from the method operand_position().
+for (; (comp = _components.iter()) != NULL; ++position) {
+// When the first component is not a DEF,
+// leave space for the result operand!
+if ( position==0 && (! comp->isa(Component::DEF)) ) {
+++position;
+}
+if( strcmp(name, comp->_name)==0 ) {
+if( ++count > 1 ) {
+uniq_idx[position] = uniq_position;
+has_dupl_use = true;
+} else {
+uniq_position = position;
+}
+}
+if( comp->isa(Component::DEF)
+&& comp->isa(Component::USE) ) {
+++position;
+if( position != 1 )
+--position;   // only use two slots for the 1st USE_DEF
+}
+}
+}
+if( has_dupl_use ) {
+for( i = 1; i < nopnds; i++ )
+if( i != uniq_idx[i] )
+break;
+int  j = i;
+for( ; i < nopnds; i++ )
+if( i == uniq_idx[i] )
+uniq_idx[i] = j++;
+num_uniq = j;
+}
+}
+_uniq_idx = uniq_idx;
+_num_uniq = num_uniq;
+}
+// Generate index values needed for determing the operand position
+void InstructForm::index_temps(FILE *fp, FormDict &globals, const char *prefix, const char *receiver) {
+uint  idx = 0;                  // position of operand in match rule
+int   cur_num_opnds = num_opnds();
+// Compute the index into vector of operand pointers:
+// idx0=0 is used to indicate that info comes from this same node, not from input edge.
+// idx1 starts at oper_input_base()
+if ( cur_num_opnds >= 1 ) {
+fprintf(fp,"    // Start at oper_input_base() and count operands\n");
+fprintf(fp,"    unsigned %sidx0 = %d;\n", prefix, oper_input_base(globals));
+fprintf(fp,"    unsigned %sidx1 = %d;\n", prefix, oper_input_base(globals));
+// Generate starting points for other unique operands if they exist
+for ( idx = 2; idx < num_unique_opnds(); ++idx ) {
+if( *receiver == 0 ) {
+fprintf(fp,"    unsigned %sidx%d = %sidx%d + opnd_array(%d)->num_edges();\n",
+prefix, idx, prefix, idx-1, idx-1 );
+} else {
+fprintf(fp,"    unsigned %sidx%d = %sidx%d + %s_opnds[%d]->num_edges();\n",
+prefix, idx, prefix, idx-1, receiver, idx-1 );
+}
+}
+}
+if( *receiver != 0 ) {
+// This value is used by generate_peepreplace when copying a node.
+// Don't emit it in other cases since it can hide bugs with the
+// use invalid idx's.
+fprintf(fp,"    unsigned %sidx%d = %sreq(); \n", prefix, idx, receiver);
+}
+}
+// ---------------------------
+bool InstructForm::verify() {
+// !!!!! !!!!!
+// Check that a "label" operand occurs last in the operand list, if present
+return true;
+}
+void InstructForm::dump() {
+output(stderr);
+}
+void InstructForm::output(FILE *fp) {
+fprintf(fp,"\nInstruction: %s\n", (_ident?_ident:""));
+if (_matrule)   _matrule->output(fp);
+if (_insencode) _insencode->output(fp);
+if (_opcode)    _opcode->output(fp);
+if (_attribs)   _attribs->output(fp);
+if (_predicate) _predicate->output(fp);
+if (_effects.Size()) {
+fprintf(fp,"Effects\n");
+_effects.dump();
+}
+if (_exprule)   _exprule->output(fp);
+if (_rewrule)   _rewrule->output(fp);
+if (_format)    _format->output(fp);
+if (_peephole)  _peephole->output(fp);
+}
+void MachNodeForm::dump() {
+output(stderr);
+}
+void MachNodeForm::output(FILE *fp) {
+fprintf(fp,"\nMachNode: %s\n", (_ident?_ident:""));
+}
+//------------------------------build_predicate--------------------------------
+// Build instruction predicates.  If the user uses the same operand name
+// twice, we need to check that the operands are pointer-eequivalent in
+// the DFA during the labeling process.
+Predicate *InstructForm::build_predicate() {
+char buf[1024], *s=buf;
+Dict names(cmpstr,hashstr,Form::arena);       // Map Names to counts
+MatchNode *mnode =
+strcmp(_matrule->_opType, "Set") ? _matrule : _matrule->_rChild;
+mnode->count_instr_names(names);
+uint first = 1;
+// Start with the predicate supplied in the .ad file.
+if( _predicate ) {
+if( first ) first=0;
+strcpy(s,"("); s += strlen(s);
+strcpy(s,_predicate->_pred);
+s += strlen(s);
+strcpy(s,")"); s += strlen(s);
+}
+for( DictI i(&names); i.test(); ++i ) {
+uintptr_t cnt = (uintptr_t)i._value;
+if( cnt > 1 ) {             // Need a predicate at all?
+assert( cnt == 2, "Unimplemented" );
+// Handle many pairs
+if( first ) first=0;
+else {                    // All tests must pass, so use '&&'
+strcpy(s," && ");
+s += strlen(s);
+}
+// Add predicate to working buffer
+sprintf(s,"/*%s*/(",(char*)i._key);
+s += strlen(s);
+mnode->build_instr_pred(s,(char*)i._key,0);
+s += strlen(s);
+strcpy(s," == "); s += strlen(s);
+mnode->build_instr_pred(s,(char*)i._key,1);
+s += strlen(s);
+strcpy(s,")"); s += strlen(s);
+}
+}
+if( s == buf ) s = NULL;
+else {
+assert( strlen(buf) < sizeof(buf), "String buffer overflow" );
+s = strdup(buf);
+}
+return new Predicate(s);
+}
+//------------------------------EncodeForm-------------------------------------
+// Constructor
+EncodeForm::EncodeForm()
+: _encClass(cmpstr,hashstr, Form::arena) {
+}
+EncodeForm::~EncodeForm() {
+}
+// record a new register class
+EncClass *EncodeForm::add_EncClass(const char *className) {
+EncClass *encClass = new EncClass(className);
+_eclasses.addName(className);
+_encClass.Insert(className,encClass);
+return encClass;
+}
+// Lookup the function body for an encoding class
+EncClass  *EncodeForm::encClass(const char *className) {
+assert( className != NULL, "Must provide a defined encoding name");
+EncClass *encClass = (EncClass*)_encClass[className];
+return encClass;
+}
+// Lookup the function body for an encoding class
+const char *EncodeForm::encClassBody(const char *className) {
+if( className == NULL ) return NULL;
+EncClass *encClass = (EncClass*)_encClass[className];
+assert( encClass != NULL, "Encode Class is missing.");
+encClass->_code.reset();
+const char *code = (const char*)encClass->_code.iter();
+assert( code != NULL, "Found an empty encode class body.");
+return code;
+}
+// Lookup the function body for an encoding class
+const char *EncodeForm::encClassPrototype(const char *className) {
+assert( className != NULL, "Encode class name must be non NULL.");
+return className;
+}
+void EncodeForm::dump() {                  // Debug printer
+output(stderr);
+}
+void EncodeForm::output(FILE *fp) {          // Write info to output files
+const char *name;
+fprintf(fp,"\n");
+fprintf(fp,"-------------------- Dump EncodeForm --------------------\n");
+for (_eclasses.reset(); (name = _eclasses.iter()) != NULL;) {
+((EncClass*)_encClass[name])->output(fp);
+}
+fprintf(fp,"-------------------- end  EncodeForm --------------------\n");
+}
+//------------------------------EncClass---------------------------------------
+EncClass::EncClass(const char *name)
+: _localNames(cmpstr,hashstr, Form::arena), _name(name) {
+}
+EncClass::~EncClass() {
+}
+// Add a parameter <type,name> pair
+void EncClass::add_parameter(const char *parameter_type, const char *parameter_name) {
+_parameter_type.addName( parameter_type );
+_parameter_name.addName( parameter_name );
+}
+// Verify operand types in parameter list
+bool EncClass::check_parameter_types(FormDict &globals) {
+// !!!!!
+return false;
+}
+// Add the decomposed "code" sections of an encoding's code-block
+void EncClass::add_code(const char *code) {
+_code.addName(code);
+}
+// Add the decomposed "replacement variables" of an encoding's code-block
+void EncClass::add_rep_var(char *replacement_var) {
+_code.addName(NameList::_signal);
+_rep_vars.addName(replacement_var);
+}
+// Lookup the function body for an encoding class
+int EncClass::rep_var_index(const char *rep_var) {
+uint        position = 0;
+const char *name     = NULL;
+_parameter_name.reset();
+while ( (name = _parameter_name.iter()) != NULL ) {
+if ( strcmp(rep_var,name) == 0 ) return position;
+++position;
+}
+return -1;
+}
+// Check after parsing
+bool EncClass::verify() {
+// 1!!!!
+// Check that each replacement variable, '$name' in architecture description
+// is actually a local variable for this encode class, or a reserved name
+// "primary, secondary, tertiary"
+return true;
+}
+void EncClass::dump() {
+output(stderr);
+}
+// Write info to output files
+void EncClass::output(FILE *fp) {
+fprintf(fp,"EncClass: %s", (_name ? _name : ""));
+// Output the parameter list
+_parameter_type.reset();
+_parameter_name.reset();
+const char *type = _parameter_type.iter();
+const char *name = _parameter_name.iter();
+fprintf(fp, " ( ");
+for ( ; (type != NULL) && (name != NULL);
+(type = _parameter_type.iter()), (name = _parameter_name.iter()) ) {
+fprintf(fp, " %s %s,", type, name);
+}
+fprintf(fp, " ) ");
+// Output the code block
+_code.reset();
+_rep_vars.reset();
+const char *code;
+while ( (code = _code.iter()) != NULL ) {
+if ( _code.is_signal(code) ) {
+// A replacement variable
+const char *rep_var = _rep_vars.iter();
+fprintf(fp,"($%s)", rep_var);
+} else {
+// A section of code
+fprintf(fp,"%s", code);
+}
+}
+}
+//------------------------------Opcode-----------------------------------------
+Opcode::Opcode(char *primary, char *secondary, char *tertiary)
+: _primary(primary), _secondary(secondary), _tertiary(tertiary) {
+}
+Opcode::~Opcode() {
+}
+Opcode::opcode_type Opcode::as_opcode_type(const char *param) {
+if( strcmp(param,"primary") == 0 ) {
+return Opcode::PRIMARY;
+}
+else if( strcmp(param,"secondary") == 0 ) {
+return Opcode::SECONDARY;
+}
+else if( strcmp(param,"tertiary") == 0 ) {
+return Opcode::TERTIARY;
+}
+return Opcode::NOT_AN_OPCODE;
+}
+void Opcode::print_opcode(FILE *fp, Opcode::opcode_type desired_opcode) {
+// Default values previously provided by MachNode::primary()...
+const char *description = "default_opcode()";
+const char *value       = "-1";
+// Check if user provided any opcode definitions
+if( this != NULL ) {
+// Update 'value' if user provided a definition in the instruction
+switch (desired_opcode) {
+case PRIMARY:
+description = "primary()";
+if( _primary   != NULL)  { value = _primary;     }
+break;
+case SECONDARY:
+description = "secondary()";
+if( _secondary != NULL ) { value = _secondary;   }
+break;
+case TERTIARY:
+description = "tertiary()";
+if( _tertiary  != NULL ) { value = _tertiary;    }
+break;
+default:
+assert( false, "ShouldNotReachHere();");
+break;
+}
+}
+fprintf(fp, "(%s /*%s*/)", value, description);
+}
+void Opcode::dump() {
+output(stderr);
+}
+// Write info to output files
+void Opcode::output(FILE *fp) {
+if (_primary   != NULL) fprintf(fp,"Primary   opcode: %s\n", _primary);
+if (_secondary != NULL) fprintf(fp,"Secondary opcode: %s\n", _secondary);
+if (_tertiary  != NULL) fprintf(fp,"Tertiary  opcode: %s\n", _tertiary);
+}
+//------------------------------InsEncode--------------------------------------
+InsEncode::InsEncode() {
+}
+InsEncode::~InsEncode() {
+}
+// Add "encode class name" and its parameters
+NameAndList *InsEncode::add_encode(char *encoding) {
+assert( encoding != NULL, "Must provide name for encoding");
+// add_parameter(NameList::_signal);
+NameAndList *encode = new NameAndList(encoding);
+_encoding.addName((char*)encode);
+return encode;
+}
+// Access the list of encodings
+void InsEncode::reset() {
+_encoding.reset();
+// _parameter.reset();
+}
+const char* InsEncode::encode_class_iter() {
+NameAndList  *encode_class = (NameAndList*)_encoding.iter();
+return  ( encode_class != NULL ? encode_class->name() : NULL );
+}
+// Obtain parameter name from zero based index
+const char *InsEncode::rep_var_name(InstructForm &inst, uint param_no) {
+NameAndList *params = (NameAndList*)_encoding.current();
+assert( params != NULL, "Internal Error");
+const char *param = (*params)[param_no];
+// Remove '$' if parser placed it there.
+return ( param != NULL && *param == '$') ? (param+1) : param;
+}
+void InsEncode::dump() {
+output(stderr);
+}
+// Write info to output files
+void InsEncode::output(FILE *fp) {
+NameAndList *encoding  = NULL;
+const char  *parameter = NULL;
+fprintf(fp,"InsEncode: ");
+_encoding.reset();
+while ( (encoding = (NameAndList*)_encoding.iter()) != 0 ) {
+// Output the encoding being used
+fprintf(fp,"%s(", encoding->name() );
+// Output its parameter list, if any
+bool first_param = true;
+encoding->reset();
+while (  (parameter = encoding->iter()) != 0 ) {
+// Output the ',' between parameters
+if ( ! first_param )  fprintf(fp,", ");
+first_param = false;
+// Output the parameter
+fprintf(fp,"%s", parameter);
+} // done with parameters
+fprintf(fp,")  ");
+} // done with encodings
+fprintf(fp,"\n");
+}
+//------------------------------Effect-----------------------------------------
+static int effect_lookup(const char *name) {
+if(!strcmp(name, "USE")) return Component::USE;
+if(!strcmp(name, "DEF")) return Component::DEF;
+if(!strcmp(name, "USE_DEF")) return Component::USE_DEF;
+if(!strcmp(name, "KILL")) return Component::KILL;
+if(!strcmp(name, "USE_KILL")) return Component::USE_KILL;
+if(!strcmp(name, "TEMP")) return Component::TEMP;
+if(!strcmp(name, "INVALID")) return Component::INVALID;
+assert( false,"Invalid effect name specified\n");
+return Component::INVALID;
+}
+Effect::Effect(const char *name) : _name(name), _use_def(effect_lookup(name)) {
+_ftype = Form::EFF;
+}
+Effect::~Effect() {
+}
+// Dynamic type check
+Effect *Effect::is_effect() const {
+return (Effect*)this;
+}
+// True if this component is equal to the parameter.
+bool Effect::is(int use_def_kill_enum) const {
+return (_use_def == use_def_kill_enum ? true : false);
+}
+// True if this component is used/def'd/kill'd as the parameter suggests.
+bool Effect::isa(int use_def_kill_enum) const {
+return (_use_def & use_def_kill_enum) == use_def_kill_enum;
+}
+void Effect::dump() {
+output(stderr);
+}
+void Effect::output(FILE *fp) {          // Write info to output files
+fprintf(fp,"Effect: %s\n", (_name?_name:""));
+}
+//------------------------------ExpandRule-------------------------------------
+ExpandRule::ExpandRule() : _expand_instrs(),
+_newopconst(cmpstr, hashstr, Form::arena) {
+_ftype = Form::EXP;
+}
+ExpandRule::~ExpandRule() {                  // Destructor
+}
+void ExpandRule::add_instruction(NameAndList *instruction_name_and_operand_list) {
+_expand_instrs.addName((char*)instruction_name_and_operand_list);
+}
+void ExpandRule::reset_instructions() {
+_expand_instrs.reset();
+}
+NameAndList* ExpandRule::iter_instructions() {
+return (NameAndList*)_expand_instrs.iter();
+}
+void ExpandRule::dump() {
+output(stderr);
+}
+void ExpandRule::output(FILE *fp) {         // Write info to output files
+NameAndList *expand_instr = NULL;
+const char *opid = NULL;
+fprintf(fp,"\nExpand Rule:\n");
+// Iterate over the instructions 'node' expands into
+for(reset_instructions(); (expand_instr = iter_instructions()) != NULL; ) {
+fprintf(fp,"%s(", expand_instr->name());
+// iterate over the operand list
+for( expand_instr->reset(); (opid = expand_instr->iter()) != NULL; ) {
+fprintf(fp,"%s ", opid);
+}
+fprintf(fp,");\n");
+}
+}
+//------------------------------RewriteRule------------------------------------
+RewriteRule::RewriteRule(char* params, char* block)
+: _tempParams(params), _tempBlock(block) { };  // Constructor
+RewriteRule::~RewriteRule() {                 // Destructor
+}
+void RewriteRule::dump() {
+output(stderr);
+}
+void RewriteRule::output(FILE *fp) {         // Write info to output files
+fprintf(fp,"\nRewrite Rule:\n%s\n%s\n",
+(_tempParams?_tempParams:""),
+(_tempBlock?_tempBlock:""));
+}
+//==============================MachNodes======================================
+//------------------------------MachNodeForm-----------------------------------
+MachNodeForm::MachNodeForm(char *id)
+: _ident(id) {
+}
+MachNodeForm::~MachNodeForm() {
+}
+MachNodeForm *MachNodeForm::is_machnode() const {
+return (MachNodeForm*)this;
+}
+//==============================Operand Classes================================
+//------------------------------OpClassForm------------------------------------
+OpClassForm::OpClassForm(const char* id) : _ident(id) {
+_ftype = Form::OPCLASS;
+}
+OpClassForm::~OpClassForm() {
+}
+bool OpClassForm::ideal_only() const { return 0; }
+OpClassForm *OpClassForm::is_opclass() const {
+return (OpClassForm*)this;
+}
+Form::InterfaceType OpClassForm::interface_type(FormDict &globals) const {
+if( _oplst.count() == 0 ) return Form::no_interface;
+// Check that my operands have the same interface type
+Form::InterfaceType  interface;
+bool  first = true;
+NameList &op_list = (NameList &)_oplst;
+op_list.reset();
+const char *op_name;
+while( (op_name = op_list.iter()) != NULL ) {
+const Form  *form    = globals[op_name];
+OperandForm *operand = form->is_operand();
+assert( operand, "Entry in operand class that is not an operand");
+if( first ) {
+first     = false;
+interface = operand->interface_type(globals);
+} else {
+interface = (interface == operand->interface_type(globals) ? interface : Form::no_interface);
+}
+}
+return interface;
+}
+bool OpClassForm::stack_slots_only(FormDict &globals) const {
+if( _oplst.count() == 0 ) return false;  // how?
+NameList &op_list = (NameList &)_oplst;
+op_list.reset();
+const char *op_name;
+while( (op_name = op_list.iter()) != NULL ) {
+const Form  *form    = globals[op_name];
+OperandForm *operand = form->is_operand();
+assert( operand, "Entry in operand class that is not an operand");
+if( !operand->stack_slots_only(globals) )  return false;
+}
+return true;
+}
+void OpClassForm::dump() {
+output(stderr);
+}
+void OpClassForm::output(FILE *fp) {
+const char *name;
+fprintf(fp,"\nOperand Class: %s\n", (_ident?_ident:""));
+fprintf(fp,"\nCount = %d\n", _oplst.count());
+for(_oplst.reset(); (name = _oplst.iter()) != NULL;) {
+fprintf(fp,"%s, ",name);
+}
+fprintf(fp,"\n");
+}
+//==============================Operands=======================================
+//------------------------------OperandForm------------------------------------
+OperandForm::OperandForm(const char* id)
+: OpClassForm(id), _ideal_only(false),
+_localNames(cmpstr, hashstr, Form::arena) {
+_ftype = Form::OPER;
+_matrule   = NULL;
+_interface = NULL;
+_attribs   = NULL;
+_predicate = NULL;
+_constraint= NULL;
+_construct = NULL;
+_format    = NULL;
+}
+OperandForm::OperandForm(const char* id, bool ideal_only)
+: OpClassForm(id), _ideal_only(ideal_only),
+_localNames(cmpstr, hashstr, Form::arena) {
+_ftype = Form::OPER;
+_matrule   = NULL;
+_interface = NULL;
+_attribs   = NULL;
+_predicate = NULL;
+_constraint= NULL;
+_construct = NULL;
+_format    = NULL;
+}
+OperandForm::~OperandForm() {
+}
+OperandForm *OperandForm::is_operand() const {
+return (OperandForm*)this;
+}
+bool OperandForm::ideal_only() const {
+return _ideal_only;
+}
+Form::InterfaceType OperandForm::interface_type(FormDict &globals) const {
+if( _interface == NULL )  return Form::no_interface;
+return _interface->interface_type(globals);
+}
+bool OperandForm::stack_slots_only(FormDict &globals) const {
+if( _constraint == NULL )  return false;
+return _constraint->stack_slots_only();
+}
+// Access op_cost attribute or return NULL.
+const char* OperandForm::cost() {
+for (Attribute* cur = _attribs; cur != NULL; cur = (Attribute*)cur->_next) {
+if( strcmp(cur->_ident,AttributeForm::_op_cost) == 0 ) {
+return cur->_val;
+}
+}
+return NULL;
+}
+// Return the number of leaves below this complex operand
+uint OperandForm::num_leaves() const {
+if ( ! _matrule) return 0;
+int num_leaves = _matrule->_numleaves;
+return num_leaves;
+}
+// Return the number of constants contained within this complex operand
+uint OperandForm::num_consts(FormDict &globals) const {
+if ( ! _matrule) return 0;
+// This is a recursive invocation on all operands in the matchrule
+return _matrule->num_consts(globals);
+}
+// Return the number of constants in match rule with specified type
+uint OperandForm::num_consts(FormDict &globals, Form::DataType type) const {
+if ( ! _matrule) return 0;
+// This is a recursive invocation on all operands in the matchrule
+return _matrule->num_consts(globals, type);
+}
+// Return the number of pointer constants contained within this complex operand
+uint OperandForm::num_const_ptrs(FormDict &globals) const {
+if ( ! _matrule) return 0;
+// This is a recursive invocation on all operands in the matchrule
+return _matrule->num_const_ptrs(globals);
+}
+uint OperandForm::num_edges(FormDict &globals) const {
+uint edges  = 0;
+uint leaves = num_leaves();
+uint consts = num_consts(globals);
+// If we are matching a constant directly, there are no leaves.
+edges = ( leaves > consts ) ? leaves - consts : 0;
+// !!!!!
+// Special case operands that do not have a corresponding ideal node.
+if( (edges == 0) && (consts == 0) ) {
+if( constrained_reg_class() != NULL ) {
+edges = 1;
+} else {
+if( _matrule
+&& (_matrule->_lChild == NULL) && (_matrule->_rChild == NULL) ) {
+const Form *form = globals[_matrule->_opType];
+OperandForm *oper = form ? form->is_operand() : NULL;
+if( oper ) {
+return oper->num_edges(globals);
+}
+}
+}
+}
+return edges;
+}
+// Check if this operand is usable for cisc-spilling
+bool  OperandForm::is_cisc_reg(FormDict &globals) const {
+const char *ideal = ideal_type(globals);
+bool is_cisc_reg = (ideal && (ideal_to_Reg_type(ideal) != none));
+return is_cisc_reg;
+}
+bool  OpClassForm::is_cisc_mem(FormDict &globals) const {
+Form::InterfaceType my_interface = interface_type(globals);
+return (my_interface == memory_interface);
+}
+// node matches ideal 'Bool'
+bool OperandForm::is_ideal_bool() const {
+if( _matrule == NULL ) return false;
+return _matrule->is_ideal_bool();
+}
+// Require user's name for an sRegX to be stackSlotX
+Form::DataType OperandForm::is_user_name_for_sReg() const {
+DataType data_type = none;
+if( _ident != NULL ) {
+if(      strcmp(_ident,"stackSlotI") == 0 ) data_type = Form::idealI;
+else if( strcmp(_ident,"stackSlotP") == 0 ) data_type = Form::idealP;
+else if( strcmp(_ident,"stackSlotD") == 0 ) data_type = Form::idealD;
+else if( strcmp(_ident,"stackSlotF") == 0 ) data_type = Form::idealF;
+else if( strcmp(_ident,"stackSlotL") == 0 ) data_type = Form::idealL;
+}
+assert((data_type == none) || (_matrule == NULL), "No match-rule for stackSlotX");
+return data_type;
+}
+// Return ideal type, if there is a single ideal type for this operand
+const char *OperandForm::ideal_type(FormDict &globals, RegisterForm *registers) const {
+const char *type = NULL;
+if (ideal_only()) type = _ident;
+else if( _matrule == NULL ) {
+// Check for condition code register
+const char *rc_name = constrained_reg_class();
+// !!!!!
+if (rc_name == NULL) return NULL;
+// !!!!! !!!!!
+// Check constraints on result's register class
+if( registers ) {
+RegClass *reg_class  = registers->getRegClass(rc_name);
+assert( reg_class != NULL, "Register class is not defined");
+// Check for ideal type of entries in register class, all are the same type
+reg_class->reset();
+RegDef *reg_def = reg_class->RegDef_iter();
+assert( reg_def != NULL, "No entries in register class");
+assert( reg_def->_idealtype != NULL, "Did not define ideal type for register");
+// Return substring that names the register's ideal type
+type = reg_def->_idealtype + 3;
+assert( *(reg_def->_idealtype + 0) == 'O', "Expect Op_ prefix");
+assert( *(reg_def->_idealtype + 1) == 'p', "Expect Op_ prefix");
+assert( *(reg_def->_idealtype + 2) == '_', "Expect Op_ prefix");
+}
+}
+else if( _matrule->_lChild == NULL && _matrule->_rChild == NULL ) {
+// This operand matches a single type, at the top level.
+// Check for ideal type
+type = _matrule->_opType;
+if( strcmp(type,"Bool") == 0 )
+return "Bool";
+// transitive lookup
+const Form *frm = globals[type];
+OperandForm *op = frm->is_operand();
+type = op->ideal_type(globals, registers);
+}
+return type;
+}
+// If there is a single ideal type for this interface field, return it.
+const char *OperandForm::interface_ideal_type(FormDict &globals,
+const char *field) const {
+const char  *ideal_type = NULL;
+const char  *value      = NULL;
+// Check if "field" is valid for this operand's interface
+if ( ! is_interface_field(field, value) )   return ideal_type;
+// !!!!! !!!!! !!!!!
+// If a valid field has a constant value, identify "ConI" or "ConP" or ...
+// Else, lookup type of field's replacement variable
+return ideal_type;
+}
+RegClass* OperandForm::get_RegClass() const {
+if (_interface && !_interface->is_RegInterface()) return NULL;
+return globalAD->get_registers()->getRegClass(constrained_reg_class());
+}
+bool OperandForm::is_bound_register() const {
+RegClass *reg_class  = get_RegClass();
+if (reg_class == NULL) return false;
+const char * name = ideal_type(globalAD->globalNames());
+if (name == NULL) return false;
+int size = 0;
+if (strcmp(name,"RegFlags")==0) size =  1;
+if (strcmp(name,"RegI")==0) size =  1;
+if (strcmp(name,"RegF")==0) size =  1;
+if (strcmp(name,"RegD")==0) size =  2;
+if (strcmp(name,"RegL")==0) size =  2;
+if (strcmp(name,"RegP")==0) size =  globalAD->get_preproc_def("_LP64") ? 2 : 1;
+if (size == 0) return false;
+return size == reg_class->size();
+}
+// Check if this is a valid field for this operand,
+// Return 'true' if valid, and set the value to the string the user provided.
+bool  OperandForm::is_interface_field(const char *field,
+const char * &value) const {
+return false;
+}
+// Return register class name if a constraint specifies the register class.
+const char *OperandForm::constrained_reg_class() const {
+const char *reg_class  = NULL;
+if ( _constraint ) {
+// !!!!!
+Constraint *constraint = _constraint;
+if ( strcmp(_constraint->_func,"ALLOC_IN_RC") == 0 ) {
+reg_class = _constraint->_arg;
+}
+}
+return reg_class;
+}
+// Return the register class associated with 'leaf'.
+const char *OperandForm::in_reg_class(uint leaf, FormDict &globals) {
+const char *reg_class = NULL; // "RegMask::Empty";
+if((_matrule == NULL) || (_matrule->is_chain_rule(globals))) {
+reg_class = constrained_reg_class();
+return reg_class;
+}
+const char *result   = NULL;
+const char *name     = NULL;
+const char *type     = NULL;
+// iterate through all base operands
+// until we reach the register that corresponds to "leaf"
+// This function is not looking for an ideal type.  It needs the first
+// level user type associated with the leaf.
+for(uint idx = 0;_matrule->base_operand(idx,globals,result,name,type);++idx) {
+const Form *form = (_localNames[name] ? _localNames[name] : globals[result]);
+OperandForm *oper = form ? form->is_operand() : NULL;
+if( oper ) {
+reg_class = oper->constrained_reg_class();
+if( reg_class ) {
+reg_class = reg_class;
+} else {
+// ShouldNotReachHere();
+}
+} else {
+// ShouldNotReachHere();
+}
+// Increment our target leaf position if current leaf is not a candidate.
+if( reg_class == NULL)    ++leaf;
+// Exit the loop with the value of reg_class when at the correct index
+if( idx == leaf )         break;
+// May iterate through all base operands if reg_class for 'leaf' is NULL
+}
+return reg_class;
+}
+// Recursive call to construct list of top-level operands.
+// Implementation does not modify state of internal structures
+void OperandForm::build_components() {
+if (_matrule)  _matrule->append_components(_localNames, _components);
+// Add parameters that "do not appear in match rule".
+const char *name;
+for (_parameters.reset(); (name = _parameters.iter()) != NULL;) {
+OperandForm *opForm = (OperandForm*)_localNames[name];
+if ( _components.operand_position(name) == -1 ) {
+_components.insert(name, opForm->_ident, Component::INVALID, false);
+}
+}
+return;
+}
+int OperandForm::operand_position(const char *name, int usedef) {
+return _components.operand_position(name, usedef);
+}
+// Return zero-based position in component list, only counting constants;
+// Return -1 if not in list.
+int OperandForm::constant_position(FormDict &globals, const Component *last) {
+// Iterate through components and count constants preceeding 'constant'
+uint  position = 0;
+Component *comp;
+_components.reset();
+while( (comp = _components.iter()) != NULL  && (comp != last) ) {
+// Special case for operands that take a single user-defined operand
+// Skip the initial definition in the component list.
+if( strcmp(comp->_name,this->_ident) == 0 ) continue;
+const char *type = comp->_type;
+// Lookup operand form for replacement variable's type
+const Form *form = globals[type];
+assert( form != NULL, "Component's type not found");
+OperandForm *oper = form ? form->is_operand() : NULL;
+if( oper ) {
+if( oper->_matrule->is_base_constant(globals) != Form::none ) {
+++position;
+}
+}
+}
+// Check for being passed a component that was not in the list
+if( comp != last )  position = -1;
+return position;
+}
+// Provide position of constant by "name"
+int OperandForm::constant_position(FormDict &globals, const char *name) {
+const Component *comp = _components.search(name);
+int idx = constant_position( globals, comp );
+return idx;
+}
+// Return zero-based position in component list, only counting constants;
+// Return -1 if not in list.
+int OperandForm::register_position(FormDict &globals, const char *reg_name) {
+// Iterate through components and count registers preceeding 'last'
+uint  position = 0;
+Component *comp;
+_components.reset();
+while( (comp = _components.iter()) != NULL
+&& (strcmp(comp->_name,reg_name) != 0) ) {
+// Special case for operands that take a single user-defined operand
+// Skip the initial definition in the component list.
+if( strcmp(comp->_name,this->_ident) == 0 ) continue;
+const char *type = comp->_type;
+// Lookup operand form for component's type
+const Form *form = globals[type];
+assert( form != NULL, "Component's type not found");
+OperandForm *oper = form ? form->is_operand() : NULL;
+if( oper ) {
+if( oper->_matrule->is_base_register(globals) ) {
+++position;
+}
+}
+}
+return position;
+}
+const char *OperandForm::reduce_result()  const {
+return _ident;
+}
+// Return the name of the operand on the right hand side of the binary match
+// Return NULL if there is no right hand side
+const char *OperandForm::reduce_right(FormDict &globals)  const {
+return  ( _matrule ? _matrule->reduce_right(globals) : NULL );
+}
+// Similar for left
+const char *OperandForm::reduce_left(FormDict &globals)   const {
+return  ( _matrule ? _matrule->reduce_left(globals) : NULL );
+}
+// --------------------------- FILE *output_routines
+//
+// Output code for disp_is_oop, if true.
+void OperandForm::disp_is_oop(FILE *fp, FormDict &globals) {
+//  Check it is a memory interface with a non-user-constant disp field
+if ( this->_interface == NULL ) return;
+MemInterface *mem_interface = this->_interface->is_MemInterface();
+if ( mem_interface == NULL )    return;
+const char   *disp  = mem_interface->_disp;
+if ( *disp != '$' )             return;
+// Lookup replacement variable in operand's component list
+const char   *rep_var = disp + 1;
+const Component *comp = this->_components.search(rep_var);
+assert( comp != NULL, "Replacement variable not found in components");
+// Lookup operand form for replacement variable's type
+const char      *type = comp->_type;
+Form            *form = (Form*)globals[type];
+assert( form != NULL, "Replacement variable's type not found");
+OperandForm     *op   = form->is_operand();
+assert( op, "Memory Interface 'disp' can only emit an operand form");
+// Check if this is a ConP, which may require relocation
+if ( op->is_base_constant(globals) == Form::idealP ) {
+// Find the constant's index:  _c0, _c1, _c2, ... , _cN
+uint idx  = op->constant_position( globals, rep_var);
+fprintf(fp,"  virtual bool disp_is_oop() const {", _ident);
+fprintf(fp,  "  return _c%d->isa_oop_ptr();", idx);
+fprintf(fp, " }\n");
+}
+}
+// Generate code for internal and external format methods
+//
+// internal access to reg# node->_idx
+// access to subsumed constant _c0, _c1,
+void  OperandForm::int_format(FILE *fp, FormDict &globals, uint index) {
+Form::DataType dtype;
+if (_matrule && (_matrule->is_base_register(globals) ||
+strcmp(ideal_type(globalAD->globalNames()), "RegFlags") == 0)) {
+// !!!!! !!!!!
+fprintf(fp,    "{ char reg_str[128];\n");
+fprintf(fp,"      ra->dump_register(node,reg_str);\n");
+fprintf(fp,"      tty->print(\"%cs\",reg_str);\n",'%');
+fprintf(fp,"    }\n");
+} else if (_matrule && (dtype = _matrule->is_base_constant(globals)) != Form::none) {
+format_constant( fp, index, dtype );
+} else if (ideal_to_sReg_type(_ident) != Form::none) {
+// Special format for Stack Slot Register
+fprintf(fp,    "{ char reg_str[128];\n");
+fprintf(fp,"      ra->dump_register(node,reg_str);\n");
+fprintf(fp,"      tty->print(\"%cs\",reg_str);\n",'%');
+fprintf(fp,"    }\n");
+} else {
+fprintf(fp,"tty->print(\"No format defined for %s\n\");\n", _ident);
+fflush(fp);
+fprintf(stderr,"No format defined for %s\n", _ident);
+dump();
+assert( false,"Internal error:\n  output_internal_operand() attempting to output other than a Register or Constant");
+}
+}
+// Similar to "int_format" but for cases where data is external to operand
+// external access to reg# node->in(idx)->_idx,
+void  OperandForm::ext_format(FILE *fp, FormDict &globals, uint index) {
+Form::DataType dtype;
+if (_matrule && (_matrule->is_base_register(globals) ||
+strcmp(ideal_type(globalAD->globalNames()), "RegFlags") == 0)) {
+fprintf(fp,    "{ char reg_str[128];\n");
+fprintf(fp,"      ra->dump_register(node->in(idx");
+if ( index != 0 ) fprintf(fp,                  "+%d",index);
+fprintf(fp,                                       "),reg_str);\n");
+fprintf(fp,"      tty->print(\"%cs\",reg_str);\n",'%');
+fprintf(fp,"    }\n");
+} else if (_matrule && (dtype = _matrule->is_base_constant(globals)) != Form::none) {
+format_constant( fp, index, dtype );
+} else if (ideal_to_sReg_type(_ident) != Form::none) {
+// Special format for Stack Slot Register
+fprintf(fp,    "{ char reg_str[128];\n");
+fprintf(fp,"      ra->dump_register(node->in(idx");
+if ( index != 0 ) fprintf(fp,                  "+%d",index);
+fprintf(fp,                                       "),reg_str);\n");
+fprintf(fp,"      tty->print(\"%cs\",reg_str);\n",'%');
+fprintf(fp,"    }\n");
+} else {
+fprintf(fp,"tty->print(\"No format defined for %s\n\");\n", _ident);
+assert( false,"Internal error:\n  output_external_operand() attempting to output other than a Register or Constant");
+}
+}
+void OperandForm::format_constant(FILE *fp, uint const_index, uint const_type) {
+switch(const_type) {
+case Form::idealI: fprintf(fp,"st->print(\"#%%d\", _c%d);\n", const_index); break;
+case Form::idealP: fprintf(fp,"_c%d->dump_on(st);\n",         const_index); break;
+case Form::idealL: fprintf(fp,"st->print(\"#%%lld\", _c%d);\n", const_index); break;
+case Form::idealF: fprintf(fp,"st->print(\"#%%f\", _c%d);\n", const_index); break;
+case Form::idealD: fprintf(fp,"st->print(\"#%%f\", _c%d);\n", const_index); break;
+default:
+assert( false, "ShouldNotReachHere()");
+}
+}
+// Return the operand form corresponding to the given index, else NULL.
+OperandForm *OperandForm::constant_operand(FormDict &globals,
+uint      index) {
+// !!!!!
+// Check behavior on complex operands
+uint n_consts = num_consts(globals);
+if( n_consts > 0 ) {
+uint i = 0;
+const char *type;
+Component  *comp;
+_components.reset();
+if ((comp = _components.iter()) == NULL) {
+assert(n_consts == 1, "Bad component list detected.\n");
+// Current operand is THE operand
+if ( index == 0 ) {
+return this;
+}
+} // end if NULL
+else {
+// Skip the first component, it can not be a DEF of a constant
+do {
+type = comp->base_type(globals);
+// Check that "type" is a 'ConI', 'ConP', ...
+if ( ideal_to_const_type(type) != Form::none ) {
+// When at correct component, get corresponding Operand
+if ( index == 0 ) {
+return globals[comp->_type]->is_operand();
+}
+// Decrement number of constants to go
+--index;
+}
+} while((comp = _components.iter()) != NULL);
+}
+}
+// Did not find a constant for this index.
+return NULL;
+}
+// If this operand has a single ideal type, return its type
+Form::DataType OperandForm::simple_type(FormDict &globals) const {
+const char *type_name = ideal_type(globals);
+Form::DataType type   = type_name ? ideal_to_const_type( type_name )
+: Form::none;
+return type;
+}
+Form::DataType OperandForm::is_base_constant(FormDict &globals) const {
+if ( _matrule == NULL )    return Form::none;
+return _matrule->is_base_constant(globals);
+}
+// "true" if this operand is a simple type that is swallowed
+bool  OperandForm::swallowed(FormDict &globals) const {
+Form::DataType type   = simple_type(globals);
+if( type != Form::none ) {
+return true;
+}
+return false;
+}
+// Output code to access the value of the index'th constant
+void OperandForm::access_constant(FILE *fp, FormDict &globals,
+uint const_index) {
+OperandForm *oper = constant_operand(globals, const_index);
+assert( oper, "Index exceeds number of constants in operand");
+Form::DataType dtype = oper->is_base_constant(globals);
+switch(dtype) {
+case idealI: fprintf(fp,"_c%d",           const_index); break;
+case idealP: fprintf(fp,"_c%d->get_con()",const_index); break;
+case idealL: fprintf(fp,"_c%d",           const_index); break;
+case idealF: fprintf(fp,"_c%d",           const_index); break;
+case idealD: fprintf(fp,"_c%d",           const_index); break;
+default:
+assert( false, "ShouldNotReachHere()");
+}
+}
+void OperandForm::dump() {
+output(stderr);
+}
+void OperandForm::output(FILE *fp) {
+fprintf(fp,"\nOperand: %s\n", (_ident?_ident:""));
+if (_matrule)    _matrule->dump();
+if (_interface)  _interface->dump();
+if (_attribs)    _attribs->dump();
+if (_predicate)  _predicate->dump();
+if (_constraint) _constraint->dump();
+if (_construct)  _construct->dump();
+if (_format)     _format->dump();
+}
+//------------------------------Constraint-------------------------------------
+Constraint::Constraint(const char *func, const char *arg)
+: _func(func), _arg(arg) {
+}
+Constraint::~Constraint() { /* not owner of char* */
+}
+bool Constraint::stack_slots_only() const {
+return strcmp(_func, "ALLOC_IN_RC") == 0
+&& strcmp(_arg,  "stack_slots") == 0;
+}
+void Constraint::dump() {
+output(stderr);
+}
+void Constraint::output(FILE *fp) {           // Write info to output files
+assert((_func != NULL && _arg != NULL),"missing constraint function or arg");
+fprintf(fp,"Constraint: %s ( %s )\n", _func, _arg);
+}
+//------------------------------Predicate--------------------------------------
+Predicate::Predicate(char *pr)
+: _pred(pr) {
+}
+Predicate::~Predicate() {
+}
+void Predicate::dump() {
+output(stderr);
+}
+void Predicate::output(FILE *fp) {
+fprintf(fp,"Predicate");  // Write to output files
+}
+//------------------------------Interface--------------------------------------
+Interface::Interface(const char *name) : _name(name) {
+}
+Interface::~Interface() {
+}
+Form::InterfaceType Interface::interface_type(FormDict &globals) const {
+Interface *thsi = (Interface*)this;
+if ( thsi->is_RegInterface()   ) return Form::register_interface;
+if ( thsi->is_MemInterface()   ) return Form::memory_interface;
+if ( thsi->is_ConstInterface() ) return Form::constant_interface;
+if ( thsi->is_CondInterface()  ) return Form::conditional_interface;
+return Form::no_interface;
+}
+RegInterface   *Interface::is_RegInterface() {
+if ( strcmp(_name,"REG_INTER") != 0 )
+return NULL;
+return (RegInterface*)this;
+}
+MemInterface   *Interface::is_MemInterface() {
+if ( strcmp(_name,"MEMORY_INTER") != 0 )  return NULL;
+return (MemInterface*)this;
+}
+ConstInterface *Interface::is_ConstInterface() {
+if ( strcmp(_name,"CONST_INTER") != 0 )  return NULL;
+return (ConstInterface*)this;
+}
+CondInterface  *Interface::is_CondInterface() {
+if ( strcmp(_name,"COND_INTER") != 0 )  return NULL;
+return (CondInterface*)this;
+}
+void Interface::dump() {
+output(stderr);
+}
+// Write info to output files
+void Interface::output(FILE *fp) {
+fprintf(fp,"Interface: %s\n", (_name ? _name : "") );
+}
+//------------------------------RegInterface-----------------------------------
+RegInterface::RegInterface() : Interface("REG_INTER") {
+}
+RegInterface::~RegInterface() {
+}
+void RegInterface::dump() {
+output(stderr);
+}
+// Write info to output files
+void RegInterface::output(FILE *fp) {
+Interface::output(fp);
+}
+//------------------------------ConstInterface---------------------------------
+ConstInterface::ConstInterface() : Interface("CONST_INTER") {
+}
+ConstInterface::~ConstInterface() {
+}
+void ConstInterface::dump() {
+output(stderr);
+}
+// Write info to output files
+void ConstInterface::output(FILE *fp) {
+Interface::output(fp);
+}
+//------------------------------MemInterface-----------------------------------
+MemInterface::MemInterface(char *base, char *index, char *scale, char *disp)
+: Interface("MEMORY_INTER"), _base(base), _index(index), _scale(scale), _disp(disp) {
+}
+MemInterface::~MemInterface() {
+// not owner of any character arrays
+}
+void MemInterface::dump() {
+output(stderr);
+}
+// Write info to output files
+void MemInterface::output(FILE *fp) {
+Interface::output(fp);
+if ( _base  != NULL ) fprintf(fp,"  base  == %s\n", _base);
+if ( _index != NULL ) fprintf(fp,"  index == %s\n", _index);
+if ( _scale != NULL ) fprintf(fp,"  scale == %s\n", _scale);
+if ( _disp  != NULL ) fprintf(fp,"  disp  == %s\n", _disp);
+// fprintf(fp,"\n");
+}
+//------------------------------CondInterface----------------------------------
+CondInterface::CondInterface(char *equal,      char *not_equal,
+char *less,       char *greater_equal,
+char *less_equal, char *greater)
+: Interface("COND_INTER"),
+_equal(equal), _not_equal(not_equal),
+_less(less), _greater_equal(greater_equal),
+_less_equal(less_equal), _greater(greater) {
+//
+}
+CondInterface::~CondInterface() {
+// not owner of any character arrays
+}
+void CondInterface::dump() {
+output(stderr);
+}
+// Write info to output files
+void CondInterface::output(FILE *fp) {
+Interface::output(fp);
+if ( _equal  != NULL )     fprintf(fp," equal       == %s\n", _equal);
+if ( _not_equal  != NULL ) fprintf(fp," not_equal   == %s\n", _not_equal);
+if ( _less  != NULL )      fprintf(fp," less        == %s\n", _less);
+if ( _greater_equal  != NULL ) fprintf(fp," greater_equal   == %s\n", _greater_equal);
+if ( _less_equal  != NULL ) fprintf(fp," less_equal  == %s\n", _less_equal);
+if ( _greater  != NULL )    fprintf(fp," greater     == %s\n", _greater);
+// fprintf(fp,"\n");
+}
+//------------------------------ConstructRule----------------------------------
+ConstructRule::ConstructRule(char *cnstr)
+: _construct(cnstr) {
+}
+ConstructRule::~ConstructRule() {
+}
+void ConstructRule::dump() {
+output(stderr);
+}
+void ConstructRule::output(FILE *fp) {
+fprintf(fp,"\nConstruct Rule\n");  // Write to output files
+}
+//==============================Shared Forms===================================
+//------------------------------AttributeForm----------------------------------
+int         AttributeForm::_insId   = 0;           // start counter at 0
+int         AttributeForm::_opId    = 0;           // start counter at 0
+const char* AttributeForm::_ins_cost = "ins_cost"; // required name
+const char* AttributeForm::_ins_pc_relative = "ins_pc_relative";
+const char* AttributeForm::_op_cost  = "op_cost";  // required name
+AttributeForm::AttributeForm(char *attr, int type, char *attrdef)
+: Form(Form::ATTR), _attrname(attr), _atype(type), _attrdef(attrdef) {
+if (type==OP_ATTR) {
+id = ++_opId;
+}
+else if (type==INS_ATTR) {
+id = ++_insId;
+}
+else assert( false,"");
+}
+AttributeForm::~AttributeForm() {
+}
+// Dynamic type check
+AttributeForm *AttributeForm::is_attribute() const {
+return (AttributeForm*)this;
+}
+// inlined  // int  AttributeForm::type() { return id;}
+void AttributeForm::dump() {
+output(stderr);
+}
+void AttributeForm::output(FILE *fp) {
+if( _attrname && _attrdef ) {
+fprintf(fp,"\n// AttributeForm \nstatic const int %s = %s;\n",
+_attrname, _attrdef);
+}
+else {
+fprintf(fp,"\n// AttributeForm missing name %s or definition %s\n",
+(_attrname?_attrname:""), (_attrdef?_attrdef:"") );
+}
+}
+//------------------------------Component--------------------------------------
+Component::Component(const char *name, const char *type, int usedef)
+: _name(name), _type(type), _usedef(usedef) {
+_ftype = Form::COMP;
+}
+Component::~Component() {
+}
+// True if this component is equal to the parameter.
+bool Component::is(int use_def_kill_enum) const {
+return (_usedef == use_def_kill_enum ? true : false);
+}
+// True if this component is used/def'd/kill'd as the parameter suggests.
+bool Component::isa(int use_def_kill_enum) const {
+return (_usedef & use_def_kill_enum) == use_def_kill_enum;
+}
+// Extend this component with additional use/def/kill behavior
+int Component::promote_use_def_info(int new_use_def) {
+_usedef |= new_use_def;
+return _usedef;
+}
+// Check the base type of this component, if it has one
+const char *Component::base_type(FormDict &globals) {
+const Form *frm = globals[_type];
+if (frm == NULL) return NULL;
+OperandForm *op = frm->is_operand();
+if (op == NULL) return NULL;
+if (op->ideal_only()) return op->_ident;
+return (char *)op->ideal_type(globals);
+}
+void Component::dump() {
+output(stderr);
+}
+void Component::output(FILE *fp) {
+fprintf(fp,"Component:");  // Write to output files
+fprintf(fp, "  name = %s", _name);
+fprintf(fp, ", type = %s", _type);
+const char * usedef = "Undefined Use/Def info";
+switch (_usedef) {
+case USE:      usedef = "USE";      break;
+case USE_DEF:  usedef = "USE_DEF";  break;
+case USE_KILL: usedef = "USE_KILL"; break;
+case KILL:     usedef = "KILL";     break;
+case TEMP:     usedef = "TEMP";     break;
+case DEF:      usedef = "DEF";      break;
+default: assert(false, "unknown effect");
+}
+fprintf(fp, ", use/def = %s\n", usedef);
+}
+//------------------------------ComponentList---------------------------------
+ComponentList::ComponentList() : NameList(), _matchcnt(0) {
+}
+ComponentList::~ComponentList() {
+// // This list may not own its elements if copied via assignment
+// Component *component;
+// for (reset(); (component = iter()) != NULL;) {
+//   delete component;
+// }
+}
+void   ComponentList::insert(Component *component, bool mflag) {
+NameList::addName((char *)component);
+if(mflag) _matchcnt++;
+}
+void   ComponentList::insert(const char *name, const char *opType, int usedef,
+bool mflag) {
+Component * component = new Component(name, opType, usedef);
+insert(component, mflag);
+}
+Component *ComponentList::current() { return (Component*)NameList::current(); }
+Component *ComponentList::iter()    { return (Component*)NameList::iter(); }
+Component *ComponentList::match_iter() {
+if(_iter < _matchcnt) return (Component*)NameList::iter();
+return NULL;
+}
+Component *ComponentList::post_match_iter() {
+Component *comp = iter();
+// At end of list?
+if ( comp == NULL ) {
+return comp;
+}
+// In post-match components?
+if (_iter > match_count()-1) {
+return comp;
+}
+return post_match_iter();
+}
+void       ComponentList::reset()   { NameList::reset(); }
+int        ComponentList::count()   { return NameList::count(); }
+Component *ComponentList::operator[](int position) {
+// Shortcut complete iteration if there are not enough entries
+if (position >= count()) return NULL;
+int        index     = 0;
+Component *component = NULL;
+for (reset(); (component = iter()) != NULL;) {
+if (index == position) {
+return component;
+}
+++index;
+}
+return NULL;
+}
+const Component *ComponentList::search(const char *name) {
+PreserveIter pi(this);
+reset();
+for( Component *comp = NULL; ((comp = iter()) != NULL); ) {
+if( strcmp(comp->_name,name) == 0 ) return comp;
+}
+return NULL;
+}
+// Return number of USEs + number of DEFs
+// When there are no components, or the first component is a USE,
+// then we add '1' to hold a space for the 'result' operand.
+int ComponentList::num_operands() {
+PreserveIter pi(this);
+uint       count = 1;           // result operand
+uint       position = 0;
+Component *component  = NULL;
+for( reset(); (component = iter()) != NULL; ++position ) {
+if( component->isa(Component::USE) ||
+( position == 0 && (! component->isa(Component::DEF))) ) {
+++count;
+}
+}
+return count;
+}
+// Return zero-based position in list;  -1 if not in list.
+// if parameter 'usedef' is ::USE, it will match USE, USE_DEF, ...
+int ComponentList::operand_position(const char *name, int usedef) {
+PreserveIter pi(this);
+int position = 0;
+int num_opnds = num_operands();
+Component *component;
+Component* preceding_non_use = NULL;
+Component* first_def = NULL;
+for (reset(); (component = iter()) != NULL; ++position) {
+// When the first component is not a DEF,
+// leave space for the result operand!
+if ( position==0 && (! component->isa(Component::DEF)) ) {
+++position;
+++num_opnds;
+}
+if (strcmp(name, component->_name)==0 && (component->isa(usedef))) {
+// When the first entry in the component list is a DEF and a USE
+// Treat them as being separate, a DEF first, then a USE
+if( position==0
+&& usedef==Component::USE && component->isa(Component::DEF) ) {
+assert(position+1 < num_opnds, "advertised index in bounds");
+return position+1;
+} else {
+if( preceding_non_use && strcmp(component->_name, preceding_non_use->_name) ) {
+fprintf(stderr, "the name '%s' should not precede the name '%s'\n", preceding_non_use->_name, name);
+}
+if( position >= num_opnds ) {
+fprintf(stderr, "the name '%s' is too late in its name list\n", name);
+}
+assert(position < num_opnds, "advertised index in bounds");
+return position;
+}
+}
+if( component->isa(Component::DEF)
+&& component->isa(Component::USE) ) {
+++position;
+if( position != 1 )  --position;   // only use two slots for the 1st USE_DEF
+}
+if( component->isa(Component::DEF) && !first_def ) {
+first_def = component;
+}
+if( !component->isa(Component::USE) && component != first_def ) {
+preceding_non_use = component;
+} else if( preceding_non_use && !strcmp(component->_name, preceding_non_use->_name) ) {
+preceding_non_use = NULL;
+}
+}
+return Not_in_list;
+}
+// Find position for this name, regardless of use/def information
+int ComponentList::operand_position(const char *name) {
+PreserveIter pi(this);
+int position = 0;
+Component *component;
+for (reset(); (component = iter()) != NULL; ++position) {
+// When the first component is not a DEF,
+// leave space for the result operand!
+if ( position==0 && (! component->isa(Component::DEF)) ) {
+++position;
+}
+if (strcmp(name, component->_name)==0) {
+return position;
+}
+if( component->isa(Component::DEF)
+&& component->isa(Component::USE) ) {
+++position;
+if( position != 1 )  --position;   // only use two slots for the 1st USE_DEF
+}
+}
+return Not_in_list;
+}
+int ComponentList::operand_position_format(const char *name) {
+PreserveIter pi(this);
+int  first_position = operand_position(name);
+int  use_position   = operand_position(name, Component::USE);
+return ((first_position < use_position) ? use_position : first_position);
+}
+int ComponentList::label_position() {
+PreserveIter pi(this);
+int position = 0;
+reset();
+for( Component *comp; (comp = iter()) != NULL; ++position) {
+// When the first component is not a DEF,
+// leave space for the result operand!
+if ( position==0 && (! comp->isa(Component::DEF)) ) {
+++position;
+}
+if (strcmp(comp->_type, "label")==0) {
+return position;
+}
+if( comp->isa(Component::DEF)
+&& comp->isa(Component::USE) ) {
+++position;
+if( position != 1 )  --position;   // only use two slots for the 1st USE_DEF
+}
+}
+return -1;
+}
+int ComponentList::method_position() {
+PreserveIter pi(this);
+int position = 0;
+reset();
+for( Component *comp; (comp = iter()) != NULL; ++position) {
+// When the first component is not a DEF,
+// leave space for the result operand!
+if ( position==0 && (! comp->isa(Component::DEF)) ) {
+++position;
+}
+if (strcmp(comp->_type, "method")==0) {
+return position;
+}
+if( comp->isa(Component::DEF)
+&& comp->isa(Component::USE) ) {
+++position;
+if( position != 1 )  --position;   // only use two slots for the 1st USE_DEF
+}
+}
+return -1;
+}
+void ComponentList::dump() { output(stderr); }
+void ComponentList::output(FILE *fp) {
+PreserveIter pi(this);
+fprintf(fp, "\n");
+Component *component;
+for (reset(); (component = iter()) != NULL;) {
+component->output(fp);
+}
+fprintf(fp, "\n");
+}
+//------------------------------MatchNode--------------------------------------
+MatchNode::MatchNode(ArchDesc &ad, const char *result, const char *mexpr,
+const char *opType, MatchNode *lChild, MatchNode *rChild)
+: _AD(ad), _result(result), _name(mexpr), _opType(opType),
+_lChild(lChild), _rChild(rChild), _internalop(0), _numleaves(0),
+_commutative_id(0) {
+_numleaves = (lChild ? lChild->_numleaves : 0)
++ (rChild ? rChild->_numleaves : 0);
+}
+MatchNode::MatchNode(ArchDesc &ad, MatchNode& mnode)
+: _AD(ad), _result(mnode._result), _name(mnode._name),
+_opType(mnode._opType), _lChild(mnode._lChild), _rChild(mnode._rChild),
+_internalop(0), _numleaves(mnode._numleaves),
+_commutative_id(mnode._commutative_id) {
+}
+MatchNode::MatchNode(ArchDesc &ad, MatchNode& mnode, int clone)
+: _AD(ad), _result(mnode._result), _name(mnode._name),
+_opType(mnode._opType),
+_internalop(0), _numleaves(mnode._numleaves),
+_commutative_id(mnode._commutative_id) {
+if (mnode._lChild) {
+_lChild = new MatchNode(ad, *mnode._lChild, clone);
+} else {
+_lChild = NULL;
+}
+if (mnode._rChild) {
+_rChild = new MatchNode(ad, *mnode._rChild, clone);
+} else {
+_rChild = NULL;
+}
+}
+MatchNode::~MatchNode() {
+// // This node may not own its children if copied via assignment
+// if( _lChild ) delete _lChild;
+// if( _rChild ) delete _rChild;
+}
+bool  MatchNode::find_type(const char *type, int &position) const {
+if ( (_lChild != NULL) && (_lChild->find_type(type, position)) ) return true;
+if ( (_rChild != NULL) && (_rChild->find_type(type, position)) ) return true;
+if (strcmp(type,_opType)==0)  {
+return true;
+} else {
+++position;
+}
+return false;
+}
+// Recursive call collecting info on top-level operands, not transitive.
+// Implementation does not modify state of internal structures.
+void MatchNode::append_components(FormDict &locals, ComponentList &components,
+bool deflag) const {
+int   usedef = deflag ? Component::DEF : Component::USE;
+FormDict &globals = _AD.globalNames();
+assert (_name != NULL, "MatchNode::build_components encountered empty node\n");
+// Base case
+if (_lChild==NULL && _rChild==NULL) {
+// If _opType is not an operation, do not build a component for it #####
+const Form *f = globals[_opType];
+if( f != NULL ) {
+// Add non-ideals that are operands, operand-classes,
+if( ! f->ideal_only()
+&& (f->is_opclass() || f->is_operand()) ) {
+components.insert(_name, _opType, usedef, true);
+}
+}
+return;
+}
+// Promote results of "Set" to DEF
+bool def_flag = (!strcmp(_opType, "Set")) ? true : false;
+if (_lChild) _lChild->append_components(locals, components, def_flag);
+def_flag = false;   // only applies to component immediately following 'Set'
+if (_rChild) _rChild->append_components(locals, components, def_flag);
+}
+// Find the n'th base-operand in the match node,
+// recursively investigates match rules of user-defined operands.
+//
+// Implementation does not modify state of internal structures since they
+// can be shared.
+bool MatchNode::base_operand(uint &position, FormDict &globals,
+const char * &result, const char * &name,
+const char * &opType) const {
+assert (_name != NULL, "MatchNode::base_operand encountered empty node\n");
+// Base case
+if (_lChild==NULL && _rChild==NULL) {
+// Check for special case: "Universe", "label"
+if (strcmp(_opType,"Universe") == 0 || strcmp(_opType,"label")==0 ) {
+if (position == 0) {
+result = _result;
+name   = _name;
+opType = _opType;
+return 1;
+} else {
+-- position;
+return 0;
+}
+}
+const Form *form = globals[_opType];
+MatchNode *matchNode = NULL;
+// Check for user-defined type
+if (form) {
+// User operand or instruction?
+OperandForm  *opForm = form->is_operand();
+InstructForm *inForm = form->is_instruction();
+if ( opForm ) {
+matchNode = (MatchNode*)opForm->_matrule;
+} else if ( inForm ) {
+matchNode = (MatchNode*)inForm->_matrule;
+}
+}
+// if this is user-defined, recurse on match rule
+// User-defined operand and instruction forms have a match-rule.
+if (matchNode) {
+return (matchNode->base_operand(position,globals,result,name,opType));
+} else {
+// Either not a form, or a system-defined form (no match rule).
+if (position==0) {
+result = _result;
+name   = _name;
+opType = _opType;
+return 1;
+} else {
+--position;
+return 0;
+}
+}
+} else {
+// Examine the left child and right child as well
+if (_lChild) {
+if (_lChild->base_operand(position, globals, result, name, opType))
+return 1;
+}
+if (_rChild) {
+if (_rChild->base_operand(position, globals, result, name, opType))
+return 1;
+}
+}
+return 0;
+}
+// Recursive call on all operands' match rules in my match rule.
+uint  MatchNode::num_consts(FormDict &globals) const {
+uint        index      = 0;
+uint        num_consts = 0;
+const char *result;
+const char *name;
+const char *opType;
+for (uint position = index;
+base_operand(position,globals,result,name,opType); position = index) {
+++index;
+if( ideal_to_const_type(opType) )        num_consts++;
+}
+return num_consts;
+}
+// Recursive call on all operands' match rules in my match rule.
+// Constants in match rule subtree with specified type
+uint  MatchNode::num_consts(FormDict &globals, Form::DataType type) const {
+uint        index      = 0;
+uint        num_consts = 0;
+const char *result;
+const char *name;
+const char *opType;
+for (uint position = index;
+base_operand(position,globals,result,name,opType); position = index) {
+++index;
+if( ideal_to_const_type(opType) == type ) num_consts++;
+}
+return num_consts;
+}
+// Recursive call on all operands' match rules in my match rule.
+uint  MatchNode::num_const_ptrs(FormDict &globals) const {
+return  num_consts( globals, Form::idealP );
+}
+bool  MatchNode::sets_result() const {
+return   ( (strcmp(_name,"Set") == 0) ? true : false );
+}
+const char *MatchNode::reduce_right(FormDict &globals) const {
+// If there is no right reduction, return NULL.
+const char      *rightStr    = NULL;
+// If we are a "Set", start from the right child.
+const MatchNode *const mnode = sets_result() ?
+(const MatchNode *const)this->_rChild :
+(const MatchNode *const)this;
+// If our right child exists, it is the right reduction
+if ( mnode->_rChild ) {
+rightStr = mnode->_rChild->_internalop ? mnode->_rChild->_internalop
+: mnode->_rChild->_opType;
+}
+// Else, May be simple chain rule: (Set dst operand_form), rightStr=NULL;
+return rightStr;
+}
+const char *MatchNode::reduce_left(FormDict &globals) const {
+// If there is no left reduction, return NULL.
+const char  *leftStr  = NULL;
+// If we are a "Set", start from the right child.
+const MatchNode *const mnode = sets_result() ?
+(const MatchNode *const)this->_rChild :
+(const MatchNode *const)this;
+// If our left child exists, it is the left reduction
+if ( mnode->_lChild ) {
+leftStr = mnode->_lChild->_internalop ? mnode->_lChild->_internalop
+: mnode->_lChild->_opType;
+} else {
+// May be simple chain rule: (Set dst operand_form_source)
+if ( sets_result() ) {
+OperandForm *oper = globals[mnode->_opType]->is_operand();
+if( oper ) {
+leftStr = mnode->_opType;
+}
+}
+}
+return leftStr;
+}
+//------------------------------count_instr_names------------------------------
+// Count occurrences of operands names in the leaves of the instruction
+// match rule.
+void MatchNode::count_instr_names( Dict &names ) {
+if( !this ) return;
+if( _lChild ) _lChild->count_instr_names(names);
+if( _rChild ) _rChild->count_instr_names(names);
+if( !_lChild && !_rChild ) {
+uintptr_t cnt = (uintptr_t)names[_name];
+cnt++;                      // One more name found
+names.Insert(_name,(void*)cnt);
+}
+}
+//------------------------------build_instr_pred-------------------------------
+// Build a path to 'name' in buf.  Actually only build if cnt is zero, so we
+// can skip some leading instances of 'name'.
+int MatchNode::build_instr_pred( char *buf, const char *name, int cnt ) {
+if( _lChild ) {
+if( !cnt ) strcpy( buf, "_kids[0]->" );
+cnt = _lChild->build_instr_pred( buf+strlen(buf), name, cnt );
+if( cnt < 0 ) return cnt;   // Found it, all done
+}
+if( _rChild ) {
+if( !cnt ) strcpy( buf, "_kids[1]->" );
+cnt = _rChild->build_instr_pred( buf+strlen(buf), name, cnt );
+if( cnt < 0 ) return cnt;   // Found it, all done
+}
+if( !_lChild && !_rChild ) {  // Found a leaf
+// Wrong name?  Give up...
+if( strcmp(name,_name) ) return cnt;
+if( !cnt ) strcpy(buf,"_leaf");
+return cnt-1;
+}
+return cnt;
+}
+//------------------------------build_internalop-------------------------------
+// Build string representation of subtree
+void MatchNode::build_internalop( ) {
+char *iop, *subtree;
+const char *lstr, *rstr;
+// Build string representation of subtree
+// Operation lchildType rchildType
+int len = (int)strlen(_opType) + 4;
+lstr = (_lChild) ? ((_lChild->_internalop) ?
+_lChild->_internalop : _lChild->_opType) : "";
+rstr = (_rChild) ? ((_rChild->_internalop) ?
+_rChild->_internalop : _rChild->_opType) : "";
+len += (int)strlen(lstr) + (int)strlen(rstr);
+subtree = (char *)malloc(len);
+sprintf(subtree,"_%s_%s_%s", _opType, lstr, rstr);
+// Hash the subtree string in _internalOps; if a name exists, use it
+iop = (char *)_AD._internalOps[subtree];
+// Else create a unique name, and add it to the hash table
+if (iop == NULL) {
+iop = subtree;
+_AD._internalOps.Insert(subtree, iop);
+_AD._internalOpNames.addName(iop);
+_AD._internalMatch.Insert(iop, this);
+}
+// Add the internal operand name to the MatchNode
+_internalop = iop;
+_result = iop;
+}
+void MatchNode::dump() {
+output(stderr);
+}
+void MatchNode::output(FILE *fp) {
+if (_lChild==0 && _rChild==0) {
+fprintf(fp," %s",_name);    // operand
+}
+else {
+fprintf(fp," (%s ",_name);  // " (opcodeName "
+if(_lChild) _lChild->output(fp); //               left operand
+if(_rChild) _rChild->output(fp); //                    right operand
+fprintf(fp,")");                 //                                 ")"
+}
+}
+int MatchNode::needs_ideal_memory_edge(FormDict &globals) const {
+static const char *needs_ideal_memory_list[] = {
+"StoreI","StoreL","StoreP","StoreD","StoreF" ,
+"StoreB","StoreC","Store" ,"StoreFP",
+"LoadI" ,"LoadL", "LoadP" ,"LoadD" ,"LoadF"  ,
+"LoadB" ,"LoadC" ,"LoadS" ,"Load"   ,
+"Store4I","Store2I","Store2L","Store2D","Store4F","Store2F","Store16B",
+"Store8B","Store4B","Store8C","Store4C","Store2C",
+"Load4I" ,"Load2I" ,"Load2L" ,"Load2D" ,"Load4F" ,"Load2F" ,"Load16B" ,
+"Load8B" ,"Load4B" ,"Load8C" ,"Load4C" ,"Load2C" ,"Load8S", "Load4S","Load2S",
+"LoadRange", "LoadKlass", "LoadL_unaligned", "LoadD_unaligned",
+"LoadPLocked", "LoadLLocked",
+"StorePConditional", "StoreLConditional",
+"CompareAndSwapI", "CompareAndSwapL", "CompareAndSwapP",
+"StoreCM",
+"ClearArray"
+};
+int cnt = sizeof(needs_ideal_memory_list)/sizeof(char*);
+if( strcmp(_opType,"PrefetchRead")==0 || strcmp(_opType,"PrefetchWrite")==0 )
+return 1;
+if( _lChild ) {
+const char *opType = _lChild->_opType;
+for( int i=0; i<cnt; i++ )
+if( strcmp(opType,needs_ideal_memory_list[i]) == 0 )
+return 1;
+if( _lChild->needs_ideal_memory_edge(globals) )
+return 1;
+}
+if( _rChild ) {
+const char *opType = _rChild->_opType;
+for( int i=0; i<cnt; i++ )
+if( strcmp(opType,needs_ideal_memory_list[i]) == 0 )
+return 1;
+if( _rChild->needs_ideal_memory_edge(globals) )
+return 1;
+}
+return 0;
+}
+// TRUE if defines a derived oop, and so needs a base oop edge present
+// post-matching.
+int MatchNode::needs_base_oop_edge() const {
+if( !strcmp(_opType,"AddP") ) return 1;
+if( strcmp(_opType,"Set") ) return 0;
+return !strcmp(_rChild->_opType,"AddP");
+}
+int InstructForm::needs_base_oop_edge(FormDict &globals) const {
+if( is_simple_chain_rule(globals) ) {
+const char *src = _matrule->_rChild->_opType;
+OperandForm *src_op = globals[src]->is_operand();
+assert( src_op, "Not operand class of chain rule" );
+return src_op->_matrule ? src_op->_matrule->needs_base_oop_edge() : 0;
+}                             // Else check instruction
+return _matrule ? _matrule->needs_base_oop_edge() : 0;
+}
+//-------------------------cisc spilling methods-------------------------------
+// helper routines and methods for detecting cisc-spilling instructions
+//-------------------------cisc_spill_merge------------------------------------
+int MatchNode::cisc_spill_merge(int left_spillable, int right_spillable) {
+int cisc_spillable  = Maybe_cisc_spillable;
+// Combine results of left and right checks
+if( (left_spillable == Maybe_cisc_spillable) && (right_spillable == Maybe_cisc_spillable) ) {
+// neither side is spillable, nor prevents cisc spilling
+cisc_spillable = Maybe_cisc_spillable;
+}
+else if( (left_spillable == Maybe_cisc_spillable) && (right_spillable > Maybe_cisc_spillable) ) {
+// right side is spillable
+cisc_spillable = right_spillable;
+}
+else if( (right_spillable == Maybe_cisc_spillable) && (left_spillable > Maybe_cisc_spillable) ) {
+// left side is spillable
+cisc_spillable = left_spillable;
+}
+else if( (left_spillable == Not_cisc_spillable) || (right_spillable == Not_cisc_spillable) ) {
+// left or right prevents cisc spilling this instruction
+cisc_spillable = Not_cisc_spillable;
+}
+else {
+// Only allow one to spill
+cisc_spillable = Not_cisc_spillable;
+}
+return cisc_spillable;
+}
+//-------------------------root_ops_match--------------------------------------
+bool static root_ops_match(FormDict &globals, const char *op1, const char *op2) {
+// Base Case: check that the current operands/operations match
+assert( op1, "Must have op's name");
+assert( op2, "Must have op's name");
+const Form *form1 = globals[op1];
+const Form *form2 = globals[op2];
+return (form1 == form2);
+}
+//-------------------------cisc_spill_match------------------------------------
+// Recursively check two MatchRules for legal conversion via cisc-spilling
+int  MatchNode::cisc_spill_match(FormDict &globals, RegisterForm *registers, MatchNode *mRule2, const char * &operand, const char * &reg_type) {
+int cisc_spillable  = Maybe_cisc_spillable;
+int left_spillable  = Maybe_cisc_spillable;
+int right_spillable = Maybe_cisc_spillable;
+// Check that each has same number of operands at this level
+if( (_lChild && !(mRule2->_lChild)) || (_rChild && !(mRule2->_rChild)) )
+return Not_cisc_spillable;
+// Base Case: check that the current operands/operations match
+// or are CISC spillable
+assert( _opType, "Must have _opType");
+assert( mRule2->_opType, "Must have _opType");
+const Form *form  = globals[_opType];
+const Form *form2 = globals[mRule2->_opType];
+if( form == form2 ) {
+cisc_spillable = Maybe_cisc_spillable;
+} else {
+const InstructForm *form2_inst = form2 ? form2->is_instruction() : NULL;
+const char *name_left  = mRule2->_lChild ? mRule2->_lChild->_opType : NULL;
+const char *name_right = mRule2->_rChild ? mRule2->_rChild->_opType : NULL;
+// Detect reg vs (loadX memory)
+if( form->is_cisc_reg(globals)
+&& form2_inst
+&& (is_load_from_memory(mRule2->_opType) != Form::none) // reg vs. (load memory)
+&& (name_left != NULL)       // NOT (load)
+&& (name_right == NULL) ) {  // NOT (load memory foo)
+const Form *form2_left = name_left ? globals[name_left] : NULL;
+if( form2_left && form2_left->is_cisc_mem(globals) ) {
+cisc_spillable = Is_cisc_spillable;
+operand        = _name;
+reg_type       = _result;
+return Is_cisc_spillable;
+} else {
+cisc_spillable = Not_cisc_spillable;
+}
+}
+// Detect reg vs memory
+else if( form->is_cisc_reg(globals) && form2->is_cisc_mem(globals) ) {
+cisc_spillable = Is_cisc_spillable;
+operand        = _name;
+reg_type       = _result;
+return Is_cisc_spillable;
+} else {
+cisc_spillable = Not_cisc_spillable;
+}
+}
+// If cisc is still possible, check rest of tree
+if( cisc_spillable == Maybe_cisc_spillable ) {
+// Check that each has same number of operands at this level
+if( (_lChild && !(mRule2->_lChild)) || (_rChild && !(mRule2->_rChild)) ) return Not_cisc_spillable;
+// Check left operands
+if( (_lChild == NULL) && (mRule2->_lChild == NULL) ) {
+left_spillable = Maybe_cisc_spillable;
+} else {
+left_spillable = _lChild->cisc_spill_match(globals, registers, mRule2->_lChild, operand, reg_type);
+}
+// Check right operands
+if( (_rChild == NULL) && (mRule2->_rChild == NULL) ) {
+right_spillable =  Maybe_cisc_spillable;
+} else {
+right_spillable = _rChild->cisc_spill_match(globals, registers, mRule2->_rChild, operand, reg_type);
+}
+// Combine results of left and right checks
+cisc_spillable = cisc_spill_merge(left_spillable, right_spillable);
+}
+return cisc_spillable;
+}
+//---------------------------cisc_spill_match----------------------------------
+// Recursively check two MatchRules for legal conversion via cisc-spilling
+// This method handles the root of Match tree,
+// general recursive checks done in MatchNode
+int  MatchRule::cisc_spill_match(FormDict &globals, RegisterForm *registers,
+MatchRule *mRule2, const char * &operand,
+const char * &reg_type) {
+int cisc_spillable  = Maybe_cisc_spillable;
+int left_spillable  = Maybe_cisc_spillable;
+int right_spillable = Maybe_cisc_spillable;
+// Check that each sets a result
+if( !(sets_result() && mRule2->sets_result()) ) return Not_cisc_spillable;
+// Check that each has same number of operands at this level
+if( (_lChild && !(mRule2->_lChild)) || (_rChild && !(mRule2->_rChild)) ) return Not_cisc_spillable;
+// Check left operands: at root, must be target of 'Set'
+if( (_lChild == NULL) || (mRule2->_lChild == NULL) ) {
+left_spillable = Not_cisc_spillable;
+} else {
+// Do not support cisc-spilling instruction's target location
+if( root_ops_match(globals, _lChild->_opType, mRule2->_lChild->_opType) ) {
+left_spillable = Maybe_cisc_spillable;
+} else {
+left_spillable = Not_cisc_spillable;
+}
+}
+// Check right operands: recursive walk to identify reg->mem operand
+if( (_rChild == NULL) && (mRule2->_rChild == NULL) ) {
+right_spillable =  Maybe_cisc_spillable;
+} else {
+right_spillable = _rChild->cisc_spill_match(globals, registers, mRule2->_rChild, operand, reg_type);
+}
+// Combine results of left and right checks
+cisc_spillable = cisc_spill_merge(left_spillable, right_spillable);
+return cisc_spillable;
+}
+//----------------------------- equivalent ------------------------------------
+// Recursively check to see if two match rules are equivalent.
+// This rule handles the root.
+bool MatchRule::equivalent(FormDict &globals, MatchRule *mRule2) {
+// Check that each sets a result
+if (sets_result() != mRule2->sets_result()) {
+return false;
+}
+// Check that the current operands/operations match
+assert( _opType, "Must have _opType");
+assert( mRule2->_opType, "Must have _opType");
+const Form *form  = globals[_opType];
+const Form *form2 = globals[mRule2->_opType];
+if( form != form2 ) {
+return false;
+}
+if (_lChild ) {
+if( !_lChild->equivalent(globals, mRule2->_lChild) )
+return false;
+} else if (mRule2->_lChild) {
+return false; // I have NULL left child, mRule2 has non-NULL left child.
+}
+if (_rChild ) {
+if( !_rChild->equivalent(globals, mRule2->_rChild) )
+return false;
+} else if (mRule2->_rChild) {
+return false; // I have NULL right child, mRule2 has non-NULL right child.
+}
+// We've made it through the gauntlet.
+return true;
+}
+//----------------------------- equivalent ------------------------------------
+// Recursively check to see if two match rules are equivalent.
+// This rule handles the operands.
+bool MatchNode::equivalent(FormDict &globals, MatchNode *mNode2) {
+if( !mNode2 )
+return false;
+// Check that the current operands/operations match
+assert( _opType, "Must have _opType");
+assert( mNode2->_opType, "Must have _opType");
+const Form *form  = globals[_opType];
+const Form *form2 = globals[mNode2->_opType];
+return (form == form2);
+}
+//-------------------------- has_commutative_op -------------------------------
+// Recursively check for commutative operations with subtree operands
+// which could be swapped.
+void MatchNode::count_commutative_op(int& count) {
+static const char *commut_op_list[] = {
+"AddI","AddL","AddF","AddD",
+"AndI","AndL",
+"MaxI","MinI",
+"MulI","MulL","MulF","MulD",
+"OrI" ,"OrL" ,
+"XorI","XorL"
+};
+int cnt = sizeof(commut_op_list)/sizeof(char*);
+if( _lChild && _rChild && (_lChild->_lChild || _rChild->_lChild) ) {
+// Don't swap if right operand is an immediate constant.
+bool is_const = false;
+if( _rChild->_lChild == NULL && _rChild->_rChild == NULL ) {
+FormDict &globals = _AD.globalNames();
+const Form *form = globals[_rChild->_opType];
+if ( form ) {
+OperandForm  *oper = form->is_operand();
+if( oper && oper->interface_type(globals) == Form::constant_interface )
+is_const = true;
+}
+}
+if( !is_const ) {
+for( int i=0; i<cnt; i++ ) {
+if( strcmp(_opType, commut_op_list[i]) == 0 ) {
+count++;
+_commutative_id = count; // id should be > 0
+break;
+}
+}
+}
+}
+if( _lChild )
+_lChild->count_commutative_op(count);
+if( _rChild )
+_rChild->count_commutative_op(count);
+}
+//-------------------------- swap_commutative_op ------------------------------
+// Recursively swap specified commutative operation with subtree operands.
+void MatchNode::swap_commutative_op(bool atroot, int id) {
+if( _commutative_id == id ) { // id should be > 0
+assert(_lChild && _rChild && (_lChild->_lChild || _rChild->_lChild ),
+"not swappable operation");
+MatchNode* tmp = _lChild;
+_lChild = _rChild;
+_rChild = tmp;
+// Don't exit here since we need to build internalop.
+}
+bool is_set = ( strcmp(_opType, "Set") == 0 );
+if( _lChild )
+_lChild->swap_commutative_op(is_set, id);
+if( _rChild )
+_rChild->swap_commutative_op(is_set, id);
+// If not the root, reduce this subtree to an internal operand
+if( !atroot && (_lChild || _rChild) ) {
+build_internalop();
+}
+}
+//-------------------------- swap_commutative_op ------------------------------
+// Recursively swap specified commutative operation with subtree operands.
+void MatchRule::swap_commutative_op(const char* instr_ident, int count, int& match_rules_cnt) {
+assert(match_rules_cnt < 100," too many match rule clones");
+// Clone
+MatchRule* clone = new MatchRule(_AD, this);
+// Swap operands of commutative operation
+((MatchNode*)clone)->swap_commutative_op(true, count);
+char* buf = (char*) malloc(strlen(instr_ident) + 4);
+sprintf(buf, "%s_%d", instr_ident, match_rules_cnt++);
+clone->_result = buf;
+clone->_next = this->_next;
+this-> _next = clone;
+if( (--count) > 0 ) {
+this-> swap_commutative_op(instr_ident, count, match_rules_cnt);
+clone->swap_commutative_op(instr_ident, count, match_rules_cnt);
+}
+}
+//------------------------------MatchRule--------------------------------------
+MatchRule::MatchRule(ArchDesc &ad)
+: MatchNode(ad), _depth(0), _construct(NULL), _numchilds(0) {
+_next = NULL;
+}
+MatchRule::MatchRule(ArchDesc &ad, MatchRule* mRule)
+: MatchNode(ad, *mRule, 0), _depth(mRule->_depth),
+_construct(mRule->_construct), _numchilds(mRule->_numchilds) {
+_next = NULL;
+}
+MatchRule::MatchRule(ArchDesc &ad, MatchNode* mroot, int depth, char *cnstr,
+int numleaves)
+: MatchNode(ad,*mroot), _depth(depth), _construct(cnstr),
+_numchilds(0) {
+_next = NULL;
+mroot->_lChild = NULL;
+mroot->_rChild = NULL;
+delete mroot;
+_numleaves = numleaves;
+_numchilds = (_lChild ? 1 : 0) + (_rChild ? 1 : 0);
+}
+MatchRule::~MatchRule() {
+}
+// Recursive call collecting info on top-level operands, not transitive.
+// Implementation does not modify state of internal structures.
+void MatchRule::append_components(FormDict &locals, ComponentList &components) const {
+assert (_name != NULL, "MatchNode::build_components encountered empty node\n");
+MatchNode::append_components(locals, components,
+false /* not necessarily a def */);
+}
+// Recursive call on all operands' match rules in my match rule.
+// Implementation does not modify state of internal structures  since they
+// can be shared.
+// The MatchNode that is called first treats its
+bool MatchRule::base_operand(uint &position0, FormDict &globals,
+const char *&result, const char * &name,
+const char * &opType)const{
+uint position = position0;
+return (MatchNode::base_operand( position, globals, result, name, opType));
+}
+bool MatchRule::is_base_register(FormDict &globals) const {
+uint   position = 1;
+const char  *result   = NULL;
+const char  *name     = NULL;
+const char  *opType   = NULL;
+if (!base_operand(position, globals, result, name, opType)) {
+position = 0;
+if( base_operand(position, globals, result, name, opType) &&
+(strcmp(opType,"RegI")==0 ||
+strcmp(opType,"RegP")==0 ||
+strcmp(opType,"RegL")==0 ||
+strcmp(opType,"RegF")==0 ||
+strcmp(opType,"RegD")==0 ||
+strcmp(opType,"Reg" )==0) ) {
+return 1;
+}
+}
+return 0;
+}
+Form::DataType MatchRule::is_base_constant(FormDict &globals) const {
+uint         position = 1;
+const char  *result   = NULL;
+const char  *name     = NULL;
+const char  *opType   = NULL;
+if (!base_operand(position, globals, result, name, opType)) {
+position = 0;
+if (base_operand(position, globals, result, name, opType)) {
+return ideal_to_const_type(opType);
+}
+}
+return Form::none;
+}
+bool MatchRule::is_chain_rule(FormDict &globals) const {
+// Check for chain rule, and do not generate a match list for it
+if ((_lChild == NULL) && (_rChild == NULL) ) {
+const Form *form = globals[_opType];
+// If this is ideal, then it is a base match, not a chain rule.
+if ( form && form->is_operand() && (!form->ideal_only())) {
+return true;
+}
+}
+// Check for "Set" form of chain rule, and do not generate a match list
+if (_rChild) {
+const char *rch = _rChild->_opType;
+const Form *form = globals[rch];
+if ((!strcmp(_opType,"Set") &&
+((form) && form->is_operand()))) {
+return true;
+}
+}
+return false;
+}
+int MatchRule::is_ideal_copy() const {
+if( _rChild ) {
+const char  *opType = _rChild->_opType;
+if( strcmp(opType,"CastII")==0 )
+return 1;
+// Do not treat *CastPP this way, because it
+// may transfer a raw pointer to an oop.
+// If the register allocator were to coalesce this
+// into a single LRG, the GC maps would be incorrect.
+//if( strcmp(opType,"CastPP")==0 )
+//  return 1;
+//if( strcmp(opType,"CheckCastPP")==0 )
+//  return 1;
+//
+// Do not treat CastX2P or CastP2X this way, because
+// raw pointers and int types are treated differently
+// when saving local & stack info for safepoints in
+// Output().
+//if( strcmp(opType,"CastX2P")==0 )
+//  return 1;
+//if( strcmp(opType,"CastP2X")==0 )
+//  return 1;
+}
+if( is_chain_rule(_AD.globalNames()) &&
+_lChild && strncmp(_lChild->_opType,"stackSlot",9)==0 )
+return 1;
+return 0;
+}
+int MatchRule::is_expensive() const {
+if( _rChild ) {
+const char  *opType = _rChild->_opType;
+if( strcmp(opType,"AtanD")==0 ||
+strcmp(opType,"CosD")==0 ||
+strcmp(opType,"DivD")==0 ||
+strcmp(opType,"DivF")==0 ||
+strcmp(opType,"DivI")==0 ||
+strcmp(opType,"ExpD")==0 ||
+strcmp(opType,"LogD")==0 ||
+strcmp(opType,"Log10D")==0 ||
+strcmp(opType,"ModD")==0 ||
+strcmp(opType,"ModF")==0 ||
+strcmp(opType,"ModI")==0 ||
+strcmp(opType,"PowD")==0 ||
+strcmp(opType,"SinD")==0 ||
+strcmp(opType,"SqrtD")==0 ||
+strcmp(opType,"TanD")==0 ||
+strcmp(opType,"ConvD2F")==0 ||
+strcmp(opType,"ConvD2I")==0 ||
+strcmp(opType,"ConvD2L")==0 ||
+strcmp(opType,"ConvF2D")==0 ||
+strcmp(opType,"ConvF2I")==0 ||
+strcmp(opType,"ConvF2L")==0 ||
+strcmp(opType,"ConvI2D")==0 ||
+strcmp(opType,"ConvI2F")==0 ||
+strcmp(opType,"ConvI2L")==0 ||
+strcmp(opType,"ConvL2D")==0 ||
+strcmp(opType,"ConvL2F")==0 ||
+strcmp(opType,"ConvL2I")==0 ||
+strcmp(opType,"RoundDouble")==0 ||
+strcmp(opType,"RoundFloat")==0 ||
+strcmp(opType,"ReverseBytesI")==0 ||
+strcmp(opType,"ReverseBytesL")==0 ||
+strcmp(opType,"Replicate16B")==0 ||
+strcmp(opType,"Replicate8B")==0 ||
+strcmp(opType,"Replicate4B")==0 ||
+strcmp(opType,"Replicate8C")==0 ||
+strcmp(opType,"Replicate4C")==0 ||
+strcmp(opType,"Replicate8S")==0 ||
+strcmp(opType,"Replicate4S")==0 ||
+strcmp(opType,"Replicate4I")==0 ||
+strcmp(opType,"Replicate2I")==0 ||
+strcmp(opType,"Replicate2L")==0 ||
+strcmp(opType,"Replicate4F")==0 ||
+strcmp(opType,"Replicate2F")==0 ||
+strcmp(opType,"Replicate2D")==0 ||
+0 /* 0 to line up columns nicely */ )
+return 1;
+}
+return 0;
+}
+bool MatchRule::is_ideal_unlock() const {
+if( !_opType ) return false;
+return !strcmp(_opType,"Unlock") || !strcmp(_opType,"FastUnlock");
+}
+bool MatchRule::is_ideal_call_leaf() const {
+if( !_opType ) return false;
+return !strcmp(_opType,"CallLeaf")     ||
+!strcmp(_opType,"CallLeafNoFP");
+}
+bool MatchRule::is_ideal_if() const {
+if( !_opType ) return false;
+return
+!strcmp(_opType,"If"            ) ||
+!strcmp(_opType,"CountedLoopEnd");
+}
+bool MatchRule::is_ideal_fastlock() const {
+if ( _opType && (strcmp(_opType,"Set") == 0) && _rChild ) {
+return (strcmp(_rChild->_opType,"FastLock") == 0);
+}
+return false;
+}
+bool MatchRule::is_ideal_membar() const {
+if( !_opType ) return false;
+return
+!strcmp(_opType,"MemBarAcquire"  ) ||
+!strcmp(_opType,"MemBarRelease"  ) ||
+!strcmp(_opType,"MemBarVolatile" ) ||
+!strcmp(_opType,"MemBarCPUOrder" ) ;
+}
+bool MatchRule::is_ideal_loadPC() const {
+if ( _opType && (strcmp(_opType,"Set") == 0) && _rChild ) {
+return (strcmp(_rChild->_opType,"LoadPC") == 0);
+}
+return false;
+}
+bool MatchRule::is_ideal_box() const {
+if ( _opType && (strcmp(_opType,"Set") == 0) && _rChild ) {
+return (strcmp(_rChild->_opType,"Box") == 0);
+}
+return false;
+}
+bool MatchRule::is_ideal_goto() const {
+bool   ideal_goto = false;
+if( _opType && (strcmp(_opType,"Goto") == 0) ) {
+ideal_goto = true;
+}
+return ideal_goto;
+}
+bool MatchRule::is_ideal_jump() const {
+if( _opType ) {
+if( !strcmp(_opType,"Jump") )
+return true;
+}
+return false;
+}
+bool MatchRule::is_ideal_bool() const {
+if( _opType ) {
+if( !strcmp(_opType,"Bool") )
+return true;
+}
+return false;
+}
+Form::DataType MatchRule::is_ideal_load() const {
+Form::DataType ideal_load = Form::none;
+if ( _opType && (strcmp(_opType,"Set") == 0) && _rChild ) {
+const char *opType = _rChild->_opType;
+ideal_load = is_load_from_memory(opType);
+}
+return ideal_load;
+}
+Form::DataType MatchRule::is_ideal_store() const {
+Form::DataType ideal_store = Form::none;
+if ( _opType && (strcmp(_opType,"Set") == 0) && _rChild ) {
+const char *opType = _rChild->_opType;
+ideal_store = is_store_to_memory(opType);
+}
+return ideal_store;
+}
+void MatchRule::dump() {
+output(stderr);
+}
+void MatchRule::output(FILE *fp) {
+fprintf(fp,"MatchRule: ( %s",_name);
+if (_lChild) _lChild->output(fp);
+if (_rChild) _rChild->output(fp);
+fprintf(fp," )\n");
+fprintf(fp,"   nesting depth = %d\n", _depth);
+if (_result) fprintf(fp,"   Result Type = %s", _result);
+fprintf(fp,"\n");
+}
+//------------------------------Attribute--------------------------------------
+Attribute::Attribute(char *id, char* val, int type)
+: _ident(id), _val(val), _atype(type) {
+}
+Attribute::~Attribute() {
+}
+int Attribute::int_val(ArchDesc &ad) {
+// Make sure it is an integer constant:
+int result = 0;
+if (!_val || !ADLParser::is_int_token(_val, result)) {
+ad.syntax_err(0, "Attribute %s must have an integer value: %s",
+_ident, _val ? _val : "");
+}
+return result;
+}
+void Attribute::dump() {
+output(stderr);
+} // Debug printer
+// Write to output files
+void Attribute::output(FILE *fp) {
+fprintf(fp,"Attribute: %s  %s\n", (_ident?_ident:""), (_val?_val:""));
+}
+//------------------------------FormatRule----------------------------------
+FormatRule::FormatRule(char *temp)
+: _temp(temp) {
+}
+FormatRule::~FormatRule() {
+}
+void FormatRule::dump() {
+output(stderr);
+}
+// Write to output files
+void FormatRule::output(FILE *fp) {
+fprintf(fp,"\nFormat Rule: \n%s", (_temp?_temp:""));
+fprintf(fp,"\n");
+}

Mercurial > hg > truffle

comparison src/share/vm/adlc/formssel.cpp @ 0:a61af66fc99e jdk7-b24