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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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// FORMSSEL.HPP - ADL Parser Instruction Selection Forms Classes

// Class List

class Form;

class InstructForm;

class MachNodeForm;

class OperandForm;

class OpClassForm;

class AttributeForm;

class RegisterForm;

class PipelineForm;

class SourceForm;

class EncodeForm;

class Component;

class Constraint;

class Predicate;

class MatchRule;

class Attribute;

class Effect;

class ExpandRule;

class RewriteRule;

class ConstructRule;

class FormatRule;

class Peephole;

class EncClass;

class Interface;

class RegInterface;

class ConstInterface;

class MemInterface;

class CondInterface;

class Opcode;

class InsEncode;

class RegDef;

class RegClass;

class AllocClass;

class ResourceForm;

class PipeDesc;

class PipeClass;

class PeepMatch;

class PeepConstraint;

class PeepReplace;

class MatchList;

class ArchDesc;

//==============================Instructions===================================

//------------------------------InstructForm-----------------------------------

class InstructForm : public Form {

private:

  bool          _ideal_only;       // Not a user-defined instruction

  // Members used for tracking CISC-spilling

  uint          _cisc_spill_operand;// Which operand may cisc-spill

  void           set_cisc_spill_operand(uint op_index) { _cisc_spill_operand = op_index; }

  bool          _is_cisc_alternate;

  InstructForm  *_cisc_spill_alternate;// cisc possible replacement

  const char    *_cisc_reg_mask_name;

  InstructForm  *_short_branch_form;

  bool           _is_short_branch;

  uint           _alignment;

public:

  // Public Data

  const char    *_ident;           // Name of this instruction

  NameList       _parameters;      // Locally defined names

  FormDict       _localNames;      // Table of operands & their types

  MatchRule     *_matrule;         // Matching rule for this instruction

  Opcode        *_opcode;          // Encoding of the opcode for instruction

  char          *_size;            // Size of instruction

  InsEncode     *_insencode;       // Encoding class instruction belongs to

  Attribute     *_attribs;         // List of Attribute rules

  Predicate     *_predicate;       // Predicate test for this instruction

  FormDict       _effects;         // Dictionary of effect rules

  ExpandRule    *_exprule;         // Expand rule for this instruction

  RewriteRule   *_rewrule;         // Rewrite rule for this instruction

  FormatRule    *_format;          // Format for assembly generation

  Peephole      *_peephole;        // List of peephole rules for instruction

  const char    *_ins_pipe;        // Instruction Scheduline description class

  uint          *_uniq_idx;        // Indexes of unique operands

  uint           _num_uniq;        // Number  of unique operands

  ComponentList  _components;      // List of Components matches MachNode's

                                   // operand structure

  // Public Methods

  InstructForm(const char *id, bool ideal_only = false);

  InstructForm(const char *id, InstructForm *instr, MatchRule *rule);

  ~InstructForm();

  // Dynamic type check

  virtual InstructForm *is_instruction() const;

  virtual bool        ideal_only() const;

  // This instruction sets a result

  virtual bool        sets_result() const;

  // This instruction needs projections for additional DEFs or KILLs

  virtual bool        needs_projections();

  // This instruction needs extra nodes for temporary inputs

  virtual bool        has_temps();

  // This instruction defines or kills more than one object

  virtual uint        num_defs_or_kills();

  // This instruction has an expand rule?

  virtual bool        expands() const ;

  // Return this instruction's first peephole rule, or NULL

  virtual Peephole   *peepholes() const;

  // Add a peephole rule to this instruction

  virtual void        append_peephole(Peephole *peep);

  virtual bool        is_pinned(FormDict &globals); // should be pinned inside block

  virtual bool        is_projection(FormDict &globals); // node requires projection

  virtual bool        is_parm(FormDict &globals); // node matches ideal 'Parm'

  // ideal opcode enumeration

  virtual const char *ideal_Opcode(FormDict &globals)  const;

  virtual int         is_expensive() const;     // node matches ideal 'CosD'

  virtual int         is_empty_encoding() const; // _size=0 and/or _insencode empty

  virtual int         is_tls_instruction() const; // tlsLoadP rule or ideal ThreadLocal

  virtual int         is_ideal_copy() const;    // node matches ideal 'Copy*'

  virtual bool        is_ideal_unlock() const;  // node matches ideal 'Unlock'

  virtual bool        is_ideal_call_leaf() const; // node matches ideal 'CallLeaf'

  virtual bool        is_ideal_if()   const;    // node matches ideal 'If'

  virtual bool        is_ideal_fastlock() const; // node matches 'FastLock'

  virtual bool        is_ideal_membar() const;  // node matches ideal 'MemBarXXX'

  virtual bool        is_ideal_loadPC() const;  // node matches ideal 'LoadPC'

  virtual bool        is_ideal_box() const;     // node matches ideal 'Box'

  virtual bool        is_ideal_goto() const;    // node matches ideal 'Goto'

  virtual bool        is_ideal_branch() const;  // "" 'If' | 'Goto' | 'LoopEnd' | 'Jump'

  virtual bool        is_ideal_jump() const;    // node matches ideal 'Jump'

  virtual bool        is_ideal_return() const;  // node matches ideal 'Return'

  virtual bool        is_ideal_halt() const;    // node matches ideal 'Halt'

  virtual bool        is_ideal_safepoint() const; // node matches 'SafePoint'

  virtual bool        is_ideal_nop() const;     // node matches 'Nop'

  virtual bool        is_ideal_control() const; // control node

  virtual Form::CallType is_ideal_call() const; // matches ideal 'Call'

  virtual Form::DataType is_ideal_load() const; // node matches ideal 'LoadXNode'

  virtual Form::DataType is_ideal_store() const;// node matches ideal 'StoreXNode'

          bool        is_ideal_mem() const { return is_ideal_load() != Form::none || is_ideal_store() != Form::none; }

  virtual uint        two_address(FormDict &globals); // output reg must match input reg

  // when chaining a constant to an instruction, return 'true' and set opType

  virtual Form::DataType is_chain_of_constant(FormDict &globals);

  virtual Form::DataType is_chain_of_constant(FormDict &globals, const char * &opType);

  virtual Form::DataType is_chain_of_constant(FormDict &globals, const char * &opType, const char * &result_type);

  // Check if a simple chain rule

  virtual bool        is_simple_chain_rule(FormDict &globals) const;

  // check for structural rematerialization

  virtual bool        rematerialize(FormDict &globals, RegisterForm *registers);

  // loads from memory, so must check for anti-dependence

  virtual bool        needs_anti_dependence_check(FormDict &globals) const;

  virtual int         memory_operand(FormDict &globals) const;

          bool        is_wide_memory_kill(FormDict &globals) const;

  enum memory_operand_type {

    NO_MEMORY_OPERAND = -1,

    MANY_MEMORY_OPERANDS = 999999

  };

  // This instruction captures the machine-independent bottom_type

  // Expected use is for pointer vs oop determination for LoadP

  virtual bool        captures_bottom_type() const;

  virtual const char *cost();      // Access ins_cost attribute

  virtual uint        num_opnds(); // Count of num_opnds for MachNode class

  virtual uint        num_post_match_opnds();

  virtual uint        num_consts(FormDict &globals) const;// Constants in match rule

  // Constants in match rule with specified type

  virtual uint        num_consts(FormDict &globals, Form::DataType type) const;

  // Return the register class associated with 'leaf'.

  virtual const char *out_reg_class(FormDict &globals);

  // number of ideal node inputs to skip

  virtual uint        oper_input_base(FormDict &globals);

  // Does this instruction need a base-oop edge?

  int needs_base_oop_edge(FormDict &globals) const;

  // 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 *build_predicate();

  virtual void        build_components(); // top-level operands

  // Return zero-based position in component list; -1 if not in list.

  virtual int         operand_position(const char *name, int usedef);

  virtual int         operand_position_format(const char *name);

  // Return zero-based position in component list; -1 if not in list.

  virtual int         label_position();

  virtual int         method_position();

  // Return number of relocation entries needed for this instruction.

  virtual uint        reloc(FormDict &globals);

  const char         *reduce_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         *reduce_right(FormDict &globals)  const;

  const char         *reduce_left(FormDict &globals)   const;

  // Base class for this instruction, MachNode except for calls

  virtual const char *mach_base_class()  const;

  // Check if this instruction can cisc-spill to 'alternate'

  bool                cisc_spills_to(ArchDesc &AD, InstructForm *alternate);

  InstructForm       *cisc_spill_alternate() { return _cisc_spill_alternate; }

  uint                cisc_spill_operand() const { return _cisc_spill_operand; }

  bool                is_cisc_alternate() const { return _is_cisc_alternate; }

  void                set_cisc_alternate(bool val) { _is_cisc_alternate = val; }

  const char         *cisc_reg_mask_name() const { return _cisc_reg_mask_name; }

  void                set_cisc_reg_mask_name(const char *rm_name) { _cisc_reg_mask_name = rm_name; }

  // Output cisc-method prototypes and method bodies

  void                declare_cisc_version(ArchDesc &AD, FILE *fp_cpp);

  bool                define_cisc_version (ArchDesc &AD, FILE *fp_cpp);

  bool                check_branch_variant(ArchDesc &AD, InstructForm *short_branch);

  bool                is_short_branch() { return _is_short_branch; }

  void                set_short_branch(bool val) { _is_short_branch = val; }

  InstructForm       *short_branch_form() { return _short_branch_form; }

  bool                has_short_branch_form() { return _short_branch_form != NULL; }

  // Output short branch prototypes and method bodies

  void                declare_short_branch_methods(FILE *fp_cpp);

  bool                define_short_branch_methods(FILE *fp_cpp);

  uint                alignment() { return _alignment; }

  void                set_alignment(uint val) { _alignment = val; }

  // Seach through operands to determine operands unique positions.

  void                set_unique_opnds();

  uint                num_unique_opnds() { return _num_uniq; }

  uint                unique_opnds_idx(int idx) {

                        if( _uniq_idx != NULL && idx > 0 )

                          return _uniq_idx[idx];

                        else

                          return idx;

                      }

  // Operands which are only KILLs aren't part of the input array and

  // require special handling in some cases.  Their position in this

  // operand list is higher than the number of unique operands.

  bool is_noninput_operand(uint idx) {

    return (idx >= num_unique_opnds());

  }

  // --------------------------- FILE *output_routines

  //

  // Generate the format call for the replacement variable

  void                rep_var_format(FILE *fp, const char *rep_var);

  // Generate index values needed for determing the operand position

  void                index_temps   (FILE *fp, FormDict &globals, const char *prefix = "", const char *receiver = "");

  // ---------------------------

  virtual bool verify();           // Check consistency after parsing

  virtual void dump();             // Debug printer

  virtual void output(FILE *fp);   // Write to output files

};

//------------------------------EncodeForm-------------------------------------

class EncodeForm : public Form {

private:

public:

  // Public Data

  NameList  _eclasses;            // List of encode class names

  Dict      _encClass;            // Map encode class names to EncClass objects

  // Public Methods

  EncodeForm();

  ~EncodeForm();

  EncClass   *add_EncClass(const char *className);

  EncClass   *encClass(const char *className);

  const char *encClassPrototype(const char *className);

  const char *encClassBody(const char *className);

  void dump();                     // Debug printer

  void output(FILE *fp);           // Write info to output files

};

//------------------------------EncClass---------------------------------------

class EncClass : public Form {

public:

  // NameList for parameter type and name

  NameList       _parameter_type;

  NameList       _parameter_name;

  // Breakdown the encoding into strings separated by $replacement_variables

  // There is an entry in _strings, perhaps NULL, that precedes each _rep_vars

  NameList       _code;            // Strings passed through to tty->print

  NameList       _rep_vars;        // replacement variables

  NameList       _parameters;      // Locally defined names

  FormDict       _localNames;      // Table of components & their types

public:

  // Public Data

  const char    *_name;            // encoding class name

  // Public Methods

  EncClass(const char *name);

  ~EncClass();

  // --------------------------- Parameters

  // Add a parameter <type,name> pair

  void add_parameter(const char *parameter_type, const char *parameter_name);

  // Verify operand types in parameter list

  bool check_parameter_types(FormDict &globals);

  // Obtain the zero-based index corresponding to a replacement variable

  int         rep_var_index(const char *rep_var);

  int         num_args() { return _parameter_name.count(); }

  // --------------------------- Code Block

  // Add code

  void add_code(const char *string_preceeding_replacement_var);

  // Add a replacement variable or one of its subfields

  // Subfields are stored with a leading '$'

  void add_rep_var(char *replacement_var);

  bool verify();

  void dump();

  void output(FILE *fp);

};

//------------------------------MachNode---------------------------------------

class MachNodeForm: public Form {

private:

public:

  char          *_ident;           // Name of this instruction

  const char    *_machnode_pipe;   // Instruction Scheduline description class

  // Public Methods

  MachNodeForm(char *id);

  ~MachNodeForm();

  virtual MachNodeForm *is_machnode() const;

  void dump();                     // Debug printer

  void output(FILE *fp);           // Write info to output files

};

//------------------------------Opcode-----------------------------------------

class Opcode : public Form {

private:

public:

  // Public Data

  // Strings representing instruction opcodes, user defines placement in emit

  char *_primary;

  char *_secondary;

  char *_tertiary;

  enum opcode_type {

    NOT_AN_OPCODE = -1,

    PRIMARY   = 1,

    SECONDARY = 2,

    TERTIARY  = 3

  };

  // Public Methods

  Opcode(char *primary, char *secondary, char *tertiary);

  ~Opcode();

  static Opcode::opcode_type as_opcode_type(const char *designator);

  void dump();

  void output(FILE *fp);

  // --------------------------- FILE *output_routines

  bool print_opcode(FILE *fp, Opcode::opcode_type desired_opcode);

};

//------------------------------InsEncode--------------------------------------

class InsEncode : public Form {

private:

  // Public Data (access directly only for reads)

  // The encodings can only have the values predefined by the ADLC:

  // blank, RegReg, RegMem, MemReg, ...

  NameList    _encoding;

  // NameList    _parameter;

  // The parameters for each encoding are preceeded by a NameList::_signal

  // and follow the parameters for the previous encoding.

  // char *_encode;                  // Type of instruction encoding

public:

  // Public Methods

  InsEncode();

  ~InsEncode();

  // Add "encode class name" and its parameters

  NameAndList  *add_encode(char *encode_method_name);

  // Parameters are added to the returned "NameAndList" by the parser

  // Access the list of encodings

  void          reset();

  const char   *encode_class_iter();

  // Returns the number of arguments to the current encoding in the iteration

  int current_encoding_num_args() {

    return ((NameAndList*)_encoding.current())->count();

  }

  // --------------------------- Parameters

  // The following call depends upon position within encode_class_iteration

  //

  // Obtain parameter name from zero based index

  const char   *rep_var_name(InstructForm &inst, uint param_no);

  // ---------------------------

  void dump();

  void output(FILE *fp);

};

//------------------------------Effect-----------------------------------------

class Effect : public Form {

private:

public:

  // Public Data

  const char  *_name;            // Pre-defined name for effect

  int         _use_def;          // Enumeration value of effect

  // Public Methods

  Effect(const char *name);      // Constructor

  ~Effect();                     // Destructor

  // Dynamic type check

  virtual Effect *is_effect() const;

  // Return 'true' if this use def info equals the parameter

  bool  is(int use_def_kill_enum) const;

  // Return 'true' if this use def info is a superset of parameter

  bool  isa(int use_def_kill_enum) const;

  void dump();                   // Debug printer

  void output(FILE *fp);         // Write info to output files

};

//------------------------------ExpandRule-------------------------------------

class ExpandRule : public Form {

private:

  NameList _expand_instrs;        // ordered list of instructions and operands

public:

  // Public Data

  NameList _newopers;             // List of newly created operands

  Dict     _newopconst;           // Map new operands to their constructors

  void     add_instruction(NameAndList *instruction_name_and_operand_list);

  void     reset_instructions();

  NameAndList *iter_instructions();

  // Public Methods

  ExpandRule();                   // Constructor

  ~ExpandRule();                  // Destructor

  void dump();                    // Debug printer

  void output(FILE *fp);          // Write info to output files

};

//------------------------------RewriteRule------------------------------------

class RewriteRule : public Form {

private:

public:

  // Public Data

  SourceForm     *_condition;      // Rewrite condition code

  InstructForm   *_instrs;         // List of instructions to expand to

  OperandForm    *_opers;          // List of operands generated by expand

  char           *_tempParams;     // Hold string until parser is finished.

  char           *_tempBlock;      // Hold string until parser is finished.

  // Public Methods

  RewriteRule(char* params, char* block) ;

  ~RewriteRule();                  // Destructor

  void dump();                     // Debug printer

  void output(FILE *fp);           // Write info to output files

};

//==============================Operands=======================================

//------------------------------OpClassForm------------------------------------

class OpClassForm : public Form {

public:

  // Public Data

  const char    *_ident;           // Name of this operand

  NameList       _oplst;           // List of operand forms included in class

  // Public Methods

  OpClassForm(const char *id);

  ~OpClassForm();

  // dynamic type check

  virtual OpClassForm         *is_opclass() const;

  virtual Form::InterfaceType  interface_type(FormDict &globals) const;

  virtual bool                 stack_slots_only(FormDict &globals) const;