jdk8-mips64-public/hotspot: src/share/vm/c1/c1_LIR.hpp@ac637b7220d1 (annotated)

src/share/vm/c1/c1_LIR.hpp@ac637b7220d1 (annotated)

src/share/vm/c1/c1_LIR.hpp

Tue, 30 Nov 2010 23:23:40 -0800

author: iveresov
date: Tue, 30 Nov 2010 23:23:40 -0800
changeset 2344: ac637b7220d1
parent 2314: f95d63e2154a
child 2412: 037c727f35fb
permissions: -rw-r--r--

6985015: C1 needs to support compressed oops
Summary: This change implements compressed oops for C1 for x64 and sparc. The changes are mostly on the codegen level, with a few exceptions when we do access things outside of the heap that are uncompressed from the IR. Compressed oops are now also enabled with tiered.
Reviewed-by: twisti, kvn, never, phh

 /*
  * Copyright (c) 2000, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_C1_C1_LIR_HPP
 #define SHARE_VM_C1_C1_LIR_HPP
 #include "c1/c1_ValueType.hpp"
 class BlockBegin;
 class BlockList;
 class LIR_Assembler;
 class CodeEmitInfo;
 class CodeStub;
 class CodeStubList;
 class ArrayCopyStub;
 class LIR_Op;
 class ciType;
 class ValueType;
 class LIR_OpVisitState;
 class FpuStackSim;
 //---------------------------------------------------------------------
 //                 LIR Operands
 //  LIR_OprDesc
 //    LIR_OprPtr
 //      LIR_Const
 //      LIR_Address
 //---------------------------------------------------------------------
 class LIR_OprDesc;
 class LIR_OprPtr;
 class LIR_Const;
 class LIR_Address;
 class LIR_OprVisitor;
 typedef LIR_OprDesc* LIR_Opr;
 typedef int          RegNr;
 define_array(LIR_OprArray, LIR_Opr)
 define_stack(LIR_OprList, LIR_OprArray)
 define_array(LIR_OprRefArray, LIR_Opr*)
 define_stack(LIR_OprRefList, LIR_OprRefArray)
 define_array(CodeEmitInfoArray, CodeEmitInfo*)
 define_stack(CodeEmitInfoList, CodeEmitInfoArray)
 define_array(LIR_OpArray, LIR_Op*)
 define_stack(LIR_OpList, LIR_OpArray)
 // define LIR_OprPtr early so LIR_OprDesc can refer to it
 class LIR_OprPtr: public CompilationResourceObj {
  public:
   bool is_oop_pointer() const                    { return (type() == T_OBJECT); }
   bool is_float_kind() const                     { BasicType t = type(); return (t == T_FLOAT) || (t == T_DOUBLE); }
   virtual LIR_Const*  as_constant()              { return NULL; }
   virtual LIR_Address* as_address()              { return NULL; }
   virtual BasicType type() const                 = 0;
   virtual void print_value_on(outputStream* out) const = 0;
 };
 // LIR constants
 class LIR_Const: public LIR_OprPtr {
  private:
   JavaValue _value;
   void type_check(BasicType t) const   { assert(type() == t, "type check"); }
   void type_check(BasicType t1, BasicType t2) const   { assert(type() == t1 || type() == t2, "type check"); }
   void type_check(BasicType t1, BasicType t2, BasicType t3) const   { assert(type() == t1 || type() == t2 || type() == t3, "type check"); }
  public:
   LIR_Const(jint i, bool is_address=false)       { _value.set_type(is_address?T_ADDRESS:T_INT); _value.set_jint(i); }
   LIR_Const(jlong l)                             { _value.set_type(T_LONG);    _value.set_jlong(l); }
   LIR_Const(jfloat f)                            { _value.set_type(T_FLOAT);   _value.set_jfloat(f); }
   LIR_Const(jdouble d)                           { _value.set_type(T_DOUBLE);  _value.set_jdouble(d); }
   LIR_Const(jobject o)                           { _value.set_type(T_OBJECT);  _value.set_jobject(o); }
   LIR_Const(void* p) {
 #ifdef _LP64
     assert(sizeof(jlong) >= sizeof(p), "too small");;
     _value.set_type(T_LONG);    _value.set_jlong((jlong)p);
 #else
     assert(sizeof(jint) >= sizeof(p), "too small");;
     _value.set_type(T_INT);     _value.set_jint((jint)p);
 #endif
   }
   virtual BasicType type()       const { return _value.get_type(); }
   virtual LIR_Const* as_constant()     { return this; }
   jint      as_jint()    const         { type_check(T_INT, T_ADDRESS); return _value.get_jint(); }
   jlong     as_jlong()   const         { type_check(T_LONG  ); return _value.get_jlong(); }
   jfloat    as_jfloat()  const         { type_check(T_FLOAT ); return _value.get_jfloat(); }
   jdouble   as_jdouble() const         { type_check(T_DOUBLE); return _value.get_jdouble(); }
   jobject   as_jobject() const         { type_check(T_OBJECT); return _value.get_jobject(); }
   jint      as_jint_lo() const         { type_check(T_LONG  ); return low(_value.get_jlong()); }
   jint      as_jint_hi() const         { type_check(T_LONG  ); return high(_value.get_jlong()); }
 #ifdef _LP64
   address   as_pointer() const         { type_check(T_LONG  ); return (address)_value.get_jlong(); }
 #else
   address   as_pointer() const         { type_check(T_INT   ); return (address)_value.get_jint(); }
 #endif
   jint      as_jint_bits() const       { type_check(T_FLOAT, T_INT, T_ADDRESS); return _value.get_jint(); }
   jint      as_jint_lo_bits() const    {
     if (type() == T_DOUBLE) {
       return low(jlong_cast(_value.get_jdouble()));
     } else {
       return as_jint_lo();
     }
   }
   jint      as_jint_hi_bits() const    {
     if (type() == T_DOUBLE) {
       return high(jlong_cast(_value.get_jdouble()));
     } else {
       return as_jint_hi();
     }
   }
   jlong      as_jlong_bits() const    {
     if (type() == T_DOUBLE) {
       return jlong_cast(_value.get_jdouble());
     } else {
       return as_jlong();
     }
   }
   virtual void print_value_on(outputStream* out) const PRODUCT_RETURN;
   bool is_zero_float() {
     jfloat f = as_jfloat();
     jfloat ok = 0.0f;
     return jint_cast(f) == jint_cast(ok);
   }
   bool is_one_float() {
     jfloat f = as_jfloat();
     return !g_isnan(f) && g_isfinite(f) && f == 1.0;
   }
   bool is_zero_double() {
     jdouble d = as_jdouble();
     jdouble ok = 0.0;
     return jlong_cast(d) == jlong_cast(ok);
   }
   bool is_one_double() {
     jdouble d = as_jdouble();
     return !g_isnan(d) && g_isfinite(d) && d == 1.0;
   }
 };
 //---------------------LIR Operand descriptor------------------------------------
 //
 // The class LIR_OprDesc represents a LIR instruction operand;
 // it can be a register (ALU/FPU), stack location or a constant;
 // Constants and addresses are represented as resource area allocated
 // structures (see above).
 // Registers and stack locations are inlined into the this pointer
 // (see value function).
 class LIR_OprDesc: public CompilationResourceObj {
  public:
   // value structure:
   //     data       opr-type opr-kind
   // +--------------+-------+-------+
   // [max...........|7 6 5 4|3 2 1 0]
   //                             ^
   //                    is_pointer bit
   //
   // lowest bit cleared, means it is a structure pointer
   // we need  4 bits to represent types
  private:
   friend class LIR_OprFact;
   // Conversion
   intptr_t value() const                         { return (intptr_t) this; }
   bool check_value_mask(intptr_t mask, intptr_t masked_value) const {
     return (value() & mask) == masked_value;
   }
   enum OprKind {
       pointer_value      = 0
     , stack_value        = 1
     , cpu_register       = 3
     , fpu_register       = 5
     , illegal_value      = 7
   };
   enum OprBits {
       pointer_bits   = 1
     , kind_bits      = 3
     , type_bits      = 4
     , size_bits      = 2
     , destroys_bits  = 1
     , virtual_bits   = 1
     , is_xmm_bits    = 1
     , last_use_bits  = 1
     , is_fpu_stack_offset_bits = 1        // used in assertion checking on x86 for FPU stack slot allocation
     , non_data_bits  = kind_bits + type_bits + size_bits + destroys_bits + last_use_bits +
                        is_fpu_stack_offset_bits + virtual_bits + is_xmm_bits
     , data_bits      = BitsPerInt - non_data_bits
     , reg_bits       = data_bits / 2      // for two registers in one value encoding
   };
   enum OprShift {
       kind_shift     = 0
     , type_shift     = kind_shift     + kind_bits
     , size_shift     = type_shift     + type_bits
     , destroys_shift = size_shift     + size_bits
     , last_use_shift = destroys_shift + destroys_bits
     , is_fpu_stack_offset_shift = last_use_shift + last_use_bits
     , virtual_shift  = is_fpu_stack_offset_shift + is_fpu_stack_offset_bits
     , is_xmm_shift   = virtual_shift + virtual_bits
     , data_shift     = is_xmm_shift + is_xmm_bits
     , reg1_shift = data_shift
     , reg2_shift = data_shift + reg_bits
   };
   enum OprSize {
       single_size = 0 << size_shift
     , double_size = 1 << size_shift
   };
   enum OprMask {
       kind_mask      = right_n_bits(kind_bits)
     , type_mask      = right_n_bits(type_bits) << type_shift
     , size_mask      = right_n_bits(size_bits) << size_shift
     , last_use_mask  = right_n_bits(last_use_bits) << last_use_shift
     , is_fpu_stack_offset_mask = right_n_bits(is_fpu_stack_offset_bits) << is_fpu_stack_offset_shift
     , virtual_mask   = right_n_bits(virtual_bits) << virtual_shift
     , is_xmm_mask    = right_n_bits(is_xmm_bits) << is_xmm_shift
     , pointer_mask   = right_n_bits(pointer_bits)
     , lower_reg_mask = right_n_bits(reg_bits)
     , no_type_mask   = (int)(~(type_mask | last_use_mask | is_fpu_stack_offset_mask))
   };
   uintptr_t data() const                         { return value() >> data_shift; }
   int lo_reg_half() const                        { return data() & lower_reg_mask; }
   int hi_reg_half() const                        { return (data() >> reg_bits) & lower_reg_mask; }
   OprKind kind_field() const                     { return (OprKind)(value() & kind_mask); }
   OprSize size_field() const                     { return (OprSize)(value() & size_mask); }
   static char type_char(BasicType t);
  public:
   enum {
     vreg_base = ConcreteRegisterImpl::number_of_registers,
     vreg_max = (1 << data_bits) - 1
   };
   static inline LIR_Opr illegalOpr();
   enum OprType {
       unknown_type  = 0 << type_shift    // means: not set (catch uninitialized types)
     , int_type      = 1 << type_shift
     , long_type     = 2 << type_shift
     , object_type   = 3 << type_shift
     , address_type  = 4 << type_shift
     , float_type    = 5 << type_shift
     , double_type   = 6 << type_shift
   };
   friend OprType as_OprType(BasicType t);
   friend BasicType as_BasicType(OprType t);
   OprType type_field_valid() const               { assert(is_register() || is_stack(), "should not be called otherwise"); return (OprType)(value() & type_mask); }
   OprType type_field() const                     { return is_illegal() ? unknown_type : (OprType)(value() & type_mask); }
   static OprSize size_for(BasicType t) {
     switch (t) {
       case T_LONG:
       case T_DOUBLE:
         return double_size;
         break;
       case T_FLOAT:
       case T_BOOLEAN:
       case T_CHAR:
       case T_BYTE:
       case T_SHORT:
       case T_INT:
       case T_ADDRESS:
       case T_OBJECT:
       case T_ARRAY:
         return single_size;
         break;
       default:
         ShouldNotReachHere();
         return single_size;
       }
   }
   void validate_type() const PRODUCT_RETURN;
   BasicType type() const {
     if (is_pointer()) {
       return pointer()->type();
     }
     return as_BasicType(type_field());
   }
   ValueType* value_type() const                  { return as_ValueType(type()); }
   char type_char() const                         { return type_char((is_pointer()) ? pointer()->type() : type()); }
   bool is_equal(LIR_Opr opr) const         { return this == opr; }
   // checks whether types are same
   bool is_same_type(LIR_Opr opr) const     {
     assert(type_field() != unknown_type &&
            opr->type_field() != unknown_type, "shouldn't see unknown_type");
     return type_field() == opr->type_field();
   }
   bool is_same_register(LIR_Opr opr) {
     return (is_register() && opr->is_register() &&
             kind_field() == opr->kind_field() &&
             (value() & no_type_mask) == (opr->value() & no_type_mask));
   }
   bool is_pointer() const      { return check_value_mask(pointer_mask, pointer_value); }
   bool is_illegal() const      { return kind_field() == illegal_value; }
   bool is_valid() const        { return kind_field() != illegal_value; }
   bool is_register() const     { return is_cpu_register() || is_fpu_register(); }
   bool is_virtual() const      { return is_virtual_cpu()  || is_virtual_fpu();  }
   bool is_constant() const     { return is_pointer() && pointer()->as_constant() != NULL; }
   bool is_address() const      { return is_pointer() && pointer()->as_address() != NULL; }
   bool is_float_kind() const   { return is_pointer() ? pointer()->is_float_kind() : (kind_field() == fpu_register); }
   bool is_oop() const;
   // semantic for fpu- and xmm-registers:
   // * is_float and is_double return true for xmm_registers
   //   (so is_single_fpu and is_single_xmm are true)
   // * So you must always check for is_???_xmm prior to is_???_fpu to
   //   distinguish between fpu- and xmm-registers
   bool is_stack() const        { validate_type(); return check_value_mask(kind_mask,                stack_value);                 }
   bool is_single_stack() const { validate_type(); return check_value_mask(kind_mask | size_mask,    stack_value  | single_size);  }
   bool is_double_stack() const { validate_type(); return check_value_mask(kind_mask | size_mask,    stack_value  | double_size);  }
   bool is_cpu_register() const { validate_type(); return check_value_mask(kind_mask,                cpu_register);                }
   bool is_virtual_cpu() const  { validate_type(); return check_value_mask(kind_mask | virtual_mask, cpu_register | virtual_mask); }
   bool is_fixed_cpu() const    { validate_type(); return check_value_mask(kind_mask | virtual_mask, cpu_register);                }
   bool is_single_cpu() const   { validate_type(); return check_value_mask(kind_mask | size_mask,    cpu_register | single_size);  }
   bool is_double_cpu() const   { validate_type(); return check_value_mask(kind_mask | size_mask,    cpu_register | double_size);  }
   bool is_fpu_register() const { validate_type(); return check_value_mask(kind_mask,                fpu_register);                }
   bool is_virtual_fpu() const  { validate_type(); return check_value_mask(kind_mask | virtual_mask, fpu_register | virtual_mask); }
   bool is_fixed_fpu() const    { validate_type(); return check_value_mask(kind_mask | virtual_mask, fpu_register);                }
   bool is_single_fpu() const   { validate_type(); return check_value_mask(kind_mask | size_mask,    fpu_register | single_size);  }
   bool is_double_fpu() const   { validate_type(); return check_value_mask(kind_mask | size_mask,    fpu_register | double_size);  }
   bool is_xmm_register() const { validate_type(); return check_value_mask(kind_mask | is_xmm_mask,             fpu_register | is_xmm_mask); }
   bool is_single_xmm() const   { validate_type(); return check_value_mask(kind_mask | size_mask | is_xmm_mask, fpu_register | single_size | is_xmm_mask); }
   bool is_double_xmm() const   { validate_type(); return check_value_mask(kind_mask | size_mask | is_xmm_mask, fpu_register | double_size | is_xmm_mask); }
   // fast accessor functions for special bits that do not work for pointers
   // (in this functions, the check for is_pointer() is omitted)
   bool is_single_word() const      { assert(is_register() || is_stack(), "type check"); return check_value_mask(size_mask, single_size); }
   bool is_double_word() const      { assert(is_register() || is_stack(), "type check"); return check_value_mask(size_mask, double_size); }
   bool is_virtual_register() const { assert(is_register(),               "type check"); return check_value_mask(virtual_mask, virtual_mask); }
   bool is_oop_register() const     { assert(is_register() || is_stack(), "type check"); return type_field_valid() == object_type; }
   BasicType type_register() const  { assert(is_register() || is_stack(), "type check"); return as_BasicType(type_field_valid());  }
   bool is_last_use() const         { assert(is_register(), "only works for registers"); return (value() & last_use_mask) != 0; }
   bool is_fpu_stack_offset() const { assert(is_register(), "only works for registers"); return (value() & is_fpu_stack_offset_mask) != 0; }
   LIR_Opr make_last_use()          { assert(is_register(), "only works for registers"); return (LIR_Opr)(value() | last_use_mask); }
   LIR_Opr make_fpu_stack_offset()  { assert(is_register(), "only works for registers"); return (LIR_Opr)(value() | is_fpu_stack_offset_mask); }
   int single_stack_ix() const  { assert(is_single_stack() && !is_virtual(), "type check"); return (int)data(); }
   int double_stack_ix() const  { assert(is_double_stack() && !is_virtual(), "type check"); return (int)data(); }
   RegNr cpu_regnr() const      { assert(is_single_cpu()   && !is_virtual(), "type check"); return (RegNr)data(); }
   RegNr cpu_regnrLo() const    { assert(is_double_cpu()   && !is_virtual(), "type check"); return (RegNr)lo_reg_half(); }
   RegNr cpu_regnrHi() const    { assert(is_double_cpu()   && !is_virtual(), "type check"); return (RegNr)hi_reg_half(); }
   RegNr fpu_regnr() const      { assert(is_single_fpu()   && !is_virtual(), "type check"); return (RegNr)data(); }
   RegNr fpu_regnrLo() const    { assert(is_double_fpu()   && !is_virtual(), "type check"); return (RegNr)lo_reg_half(); }
   RegNr fpu_regnrHi() const    { assert(is_double_fpu()   && !is_virtual(), "type check"); return (RegNr)hi_reg_half(); }
   RegNr xmm_regnr() const      { assert(is_single_xmm()   && !is_virtual(), "type check"); return (RegNr)data(); }
   RegNr xmm_regnrLo() const    { assert(is_double_xmm()   && !is_virtual(), "type check"); return (RegNr)lo_reg_half(); }
   RegNr xmm_regnrHi() const    { assert(is_double_xmm()   && !is_virtual(), "type check"); return (RegNr)hi_reg_half(); }
   int   vreg_number() const    { assert(is_virtual(),                       "type check"); return (RegNr)data(); }
   LIR_OprPtr* pointer()  const                   { assert(is_pointer(), "type check");      return (LIR_OprPtr*)this; }
   LIR_Const* as_constant_ptr() const             { return pointer()->as_constant(); }
   LIR_Address* as_address_ptr() const            { return pointer()->as_address(); }
   Register as_register()    const;
   Register as_register_lo() const;
   Register as_register_hi() const;
   Register as_pointer_register() {
 #ifdef _LP64
     if (is_double_cpu()) {
       assert(as_register_lo() == as_register_hi(), "should be a single register");
       return as_register_lo();
     }
 #endif
     return as_register();
   }
 #ifdef X86
   XMMRegister as_xmm_float_reg() const;
   XMMRegister as_xmm_double_reg() const;
   // for compatibility with RInfo
   int fpu () const                                  { return lo_reg_half(); }
 #endif // X86
 #if defined(SPARC) || defined(ARM) || defined(PPC)
   FloatRegister as_float_reg   () const;
   FloatRegister as_double_reg  () const;
 #endif
   jint      as_jint()    const { return as_constant_ptr()->as_jint(); }
   jlong     as_jlong()   const { return as_constant_ptr()->as_jlong(); }
   jfloat    as_jfloat()  const { return as_constant_ptr()->as_jfloat(); }
   jdouble   as_jdouble() const { return as_constant_ptr()->as_jdouble(); }
   jobject   as_jobject() const { return as_constant_ptr()->as_jobject(); }
   void print() const PRODUCT_RETURN;
   void print(outputStream* out) const PRODUCT_RETURN;
 };
 inline LIR_OprDesc::OprType as_OprType(BasicType type) {
   switch (type) {
   case T_INT:      return LIR_OprDesc::int_type;
   case T_LONG:     return LIR_OprDesc::long_type;
   case T_FLOAT:    return LIR_OprDesc::float_type;
   case T_DOUBLE:   return LIR_OprDesc::double_type;
   case T_OBJECT:
   case T_ARRAY:    return LIR_OprDesc::object_type;
   case T_ADDRESS:  return LIR_OprDesc::address_type;
   case T_ILLEGAL:  // fall through
   default: ShouldNotReachHere(); return LIR_OprDesc::unknown_type;
   }
 }
 inline BasicType as_BasicType(LIR_OprDesc::OprType t) {
   switch (t) {
   case LIR_OprDesc::int_type:     return T_INT;
   case LIR_OprDesc::long_type:    return T_LONG;
   case LIR_OprDesc::float_type:   return T_FLOAT;
   case LIR_OprDesc::double_type:  return T_DOUBLE;
   case LIR_OprDesc::object_type:  return T_OBJECT;
   case LIR_OprDesc::address_type: return T_ADDRESS;
   case LIR_OprDesc::unknown_type: // fall through
   default: ShouldNotReachHere();  return T_ILLEGAL;
   }
 }
 // LIR_Address
 class LIR_Address: public LIR_OprPtr {
  friend class LIR_OpVisitState;
  public:
   // NOTE: currently these must be the log2 of the scale factor (and
   // must also be equivalent to the ScaleFactor enum in
   // assembler_i486.hpp)
   enum Scale {
     times_1  =  0,
     times_2  =  1,
     times_4  =  2,
     times_8  =  3
   };
  private:
   LIR_Opr   _base;
   LIR_Opr   _index;
   Scale     _scale;
   intx      _disp;
   BasicType _type;
  public:
   LIR_Address(LIR_Opr base, LIR_Opr index, BasicType type):
        _base(base)
      , _index(index)
      , _scale(times_1)
      , _type(type)
      , _disp(0) { verify(); }
   LIR_Address(LIR_Opr base, intx disp, BasicType type):
        _base(base)
      , _index(LIR_OprDesc::illegalOpr())
      , _scale(times_1)
      , _type(type)
      , _disp(disp) { verify(); }
   LIR_Address(LIR_Opr base, BasicType type):
        _base(base)
      , _index(LIR_OprDesc::illegalOpr())
      , _scale(times_1)
      , _type(type)
      , _disp(0) { verify(); }
 #if defined(X86) || defined(ARM)
   LIR_Address(LIR_Opr base, LIR_Opr index, Scale scale, intx disp, BasicType type):
        _base(base)
      , _index(index)
      , _scale(scale)
      , _type(type)
      , _disp(disp) { verify(); }
 #endif // X86 || ARM
   LIR_Opr base()  const                          { return _base;  }
   LIR_Opr index() const                          { return _index; }
   Scale   scale() const                          { return _scale; }
   intx    disp()  const                          { return _disp;  }
   bool equals(LIR_Address* other) const          { return base() == other->base() && index() == other->index() && disp() == other->disp() && scale() == other->scale(); }
   virtual LIR_Address* as_address()              { return this;   }
   virtual BasicType type() const                 { return _type; }
   virtual void print_value_on(outputStream* out) const PRODUCT_RETURN;
   void verify() const PRODUCT_RETURN;
   static Scale scale(BasicType type);
 };
 // operand factory
 class LIR_OprFact: public AllStatic {
  public:
   static LIR_Opr illegalOpr;
   static LIR_Opr single_cpu(int reg) {
     return (LIR_Opr)(intptr_t)((reg  << LIR_OprDesc::reg1_shift) |
                                LIR_OprDesc::int_type             |
                                LIR_OprDesc::cpu_register         |
                                LIR_OprDesc::single_size);
   }
   static LIR_Opr single_cpu_oop(int reg) {
     return (LIR_Opr)(intptr_t)((reg  << LIR_OprDesc::reg1_shift) |
                                LIR_OprDesc::object_type          |
                                LIR_OprDesc::cpu_register         |
                                LIR_OprDesc::single_size);
   }
   static LIR_Opr single_cpu_address(int reg) {
     return (LIR_Opr)(intptr_t)((reg  << LIR_OprDesc::reg1_shift) |
                                LIR_OprDesc::address_type         |
                                LIR_OprDesc::cpu_register         |
                                LIR_OprDesc::single_size);
   }
   static LIR_Opr double_cpu(int reg1, int reg2) {
     LP64_ONLY(assert(reg1 == reg2, "must be identical"));
     return (LIR_Opr)(intptr_t)((reg1 << LIR_OprDesc::reg1_shift) |
                                (reg2 << LIR_OprDesc::reg2_shift) |
                                LIR_OprDesc::long_type            |
                                LIR_OprDesc::cpu_register         |
                                LIR_OprDesc::double_size);
   }
   static LIR_Opr single_fpu(int reg)            { return (LIR_Opr)(intptr_t)((reg  << LIR_OprDesc::reg1_shift) |
                                                                              LIR_OprDesc::float_type           |
                                                                              LIR_OprDesc::fpu_register         |
                                                                              LIR_OprDesc::single_size); }
 #if defined(ARM)
   static LIR_Opr double_fpu(int reg1, int reg2)    { return (LIR_Opr)((reg1 << LIR_OprDesc::reg1_shift) | (reg2 << LIR_OprDesc::reg2_shift) | LIR_OprDesc::double_type | LIR_OprDesc::fpu_register | LIR_OprDesc::double_size); }
   static LIR_Opr single_softfp(int reg)            { return (LIR_Opr)((reg  << LIR_OprDesc::reg1_shift) |                                     LIR_OprDesc::float_type  | LIR_OprDesc::cpu_register | LIR_OprDesc::single_size); }
   static LIR_Opr double_softfp(int reg1, int reg2) { return (LIR_Opr)((reg1 << LIR_OprDesc::reg1_shift) | (reg2 << LIR_OprDesc::reg2_shift) | LIR_OprDesc::double_type | LIR_OprDesc::cpu_register | LIR_OprDesc::double_size); }
 #endif
 #ifdef SPARC
   static LIR_Opr double_fpu(int reg1, int reg2) { return (LIR_Opr)(intptr_t)((reg1 << LIR_OprDesc::reg1_shift) |
                                                                              (reg2 << LIR_OprDesc::reg2_shift) |
                                                                              LIR_OprDesc::double_type          |
                                                                              LIR_OprDesc::fpu_register         |
                                                                              LIR_OprDesc::double_size); }
 #endif
 #ifdef X86
   static LIR_Opr double_fpu(int reg)            { return (LIR_Opr)(intptr_t)((reg  << LIR_OprDesc::reg1_shift) |
                                                                              (reg  << LIR_OprDesc::reg2_shift) |
                                                                              LIR_OprDesc::double_type          |
                                                                              LIR_OprDesc::fpu_register         |
                                                                              LIR_OprDesc::double_size); }
   static LIR_Opr single_xmm(int reg)            { return (LIR_Opr)(intptr_t)((reg  << LIR_OprDesc::reg1_shift) |
                                                                              LIR_OprDesc::float_type           |
                                                                              LIR_OprDesc::fpu_register         |
                                                                              LIR_OprDesc::single_size          |
                                                                              LIR_OprDesc::is_xmm_mask); }
   static LIR_Opr double_xmm(int reg)            { return (LIR_Opr)(intptr_t)((reg  << LIR_OprDesc::reg1_shift) |
                                                                              (reg  << LIR_OprDesc::reg2_shift) |
                                                                              LIR_OprDesc::double_type          |
                                                                              LIR_OprDesc::fpu_register         |
                                                                              LIR_OprDesc::double_size          |
                                                                              LIR_OprDesc::is_xmm_mask); }
 #endif // X86
 #ifdef PPC
   static LIR_Opr double_fpu(int reg)            { return (LIR_Opr)(intptr_t)((reg  << LIR_OprDesc::reg1_shift) |
                                                                              (reg  << LIR_OprDesc::reg2_shift) |
                                                                              LIR_OprDesc::double_type          |
                                                                              LIR_OprDesc::fpu_register         |
                                                                              LIR_OprDesc::double_size); }
   static LIR_Opr single_softfp(int reg)            { return (LIR_Opr)((reg  << LIR_OprDesc::reg1_shift)        |
                                                                              LIR_OprDesc::float_type           |
                                                                              LIR_OprDesc::cpu_register         |
                                                                              LIR_OprDesc::single_size); }
   static LIR_Opr double_softfp(int reg1, int reg2) { return (LIR_Opr)((reg2 << LIR_OprDesc::reg1_shift)        |
                                                                              (reg1 << LIR_OprDesc::reg2_shift) |
                                                                              LIR_OprDesc::double_type          |
                                                                              LIR_OprDesc::cpu_register         |
                                                                              LIR_OprDesc::double_size); }
 #endif // PPC
   static LIR_Opr virtual_register(int index, BasicType type) {
     LIR_Opr res;
     switch (type) {
       case T_OBJECT: // fall through
       case T_ARRAY:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift)  |
                                             LIR_OprDesc::object_type  |
                                             LIR_OprDesc::cpu_register |
                                             LIR_OprDesc::single_size  |
                                             LIR_OprDesc::virtual_mask);
         break;
       case T_INT:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                   LIR_OprDesc::int_type              |
                                   LIR_OprDesc::cpu_register          |
                                   LIR_OprDesc::single_size           |
                                   LIR_OprDesc::virtual_mask);
         break;
       case T_ADDRESS:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                   LIR_OprDesc::address_type          |
                                   LIR_OprDesc::cpu_register          |
                                   LIR_OprDesc::single_size           |
                                   LIR_OprDesc::virtual_mask);
         break;
       case T_LONG:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                   LIR_OprDesc::long_type             |
                                   LIR_OprDesc::cpu_register          |
                                   LIR_OprDesc::double_size           |
                                   LIR_OprDesc::virtual_mask);
         break;
 #ifdef __SOFTFP__
       case T_FLOAT:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                   LIR_OprDesc::float_type  |
                                   LIR_OprDesc::cpu_register |
                                   LIR_OprDesc::single_size |
                                   LIR_OprDesc::virtual_mask);
         break;
       case T_DOUBLE:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                   LIR_OprDesc::double_type |
                                   LIR_OprDesc::cpu_register |
                                   LIR_OprDesc::double_size |
                                   LIR_OprDesc::virtual_mask);
         break;
 #else // __SOFTFP__
       case T_FLOAT:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                   LIR_OprDesc::float_type           |
                                   LIR_OprDesc::fpu_register         |
                                   LIR_OprDesc::single_size          |
                                   LIR_OprDesc::virtual_mask);
         break;
       case
         T_DOUBLE: res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                             LIR_OprDesc::double_type           |
                                             LIR_OprDesc::fpu_register          |
                                             LIR_OprDesc::double_size           |
                                             LIR_OprDesc::virtual_mask);
         break;
 #endif // __SOFTFP__
       default:       ShouldNotReachHere(); res = illegalOpr;
     }
 #ifdef ASSERT
     res->validate_type();
     assert(res->vreg_number() == index, "conversion check");
     assert(index >= LIR_OprDesc::vreg_base, "must start at vreg_base");
     assert(index <= (max_jint >> LIR_OprDesc::data_shift), "index is too big");
     // old-style calculation; check if old and new method are equal
     LIR_OprDesc::OprType t = as_OprType(type);
 #ifdef __SOFTFP__
     LIR_Opr old_res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                t |
                                LIR_OprDesc::cpu_register |
                                LIR_OprDesc::size_for(type) | LIR_OprDesc::virtual_mask);
 #else // __SOFTFP__
     LIR_Opr old_res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) | t |
                                           ((type == T_FLOAT || type == T_DOUBLE) ?  LIR_OprDesc::fpu_register : LIR_OprDesc::cpu_register) |
                                LIR_OprDesc::size_for(type) | LIR_OprDesc::virtual_mask);
     assert(res == old_res, "old and new method not equal");
 #endif // __SOFTFP__
 #endif // ASSERT
     return res;
   }
   // 'index' is computed by FrameMap::local_stack_pos(index); do not use other parameters as
   // the index is platform independent; a double stack useing indeces 2 and 3 has always
   // index 2.
   static LIR_Opr stack(int index, BasicType type) {
     LIR_Opr res;
     switch (type) {
       case T_OBJECT: // fall through
       case T_ARRAY:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                   LIR_OprDesc::object_type           |
                                   LIR_OprDesc::stack_value           |
                                   LIR_OprDesc::single_size);
         break;
       case T_INT:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                   LIR_OprDesc::int_type              |
                                   LIR_OprDesc::stack_value           |
                                   LIR_OprDesc::single_size);
         break;
       case T_ADDRESS:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                   LIR_OprDesc::address_type          |
                                   LIR_OprDesc::stack_value           |
                                   LIR_OprDesc::single_size);
         break;
       case T_LONG:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                   LIR_OprDesc::long_type             |
                                   LIR_OprDesc::stack_value           |
                                   LIR_OprDesc::double_size);
         break;
       case T_FLOAT:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                   LIR_OprDesc::float_type            |
                                   LIR_OprDesc::stack_value           |
                                   LIR_OprDesc::single_size);
         break;
       case T_DOUBLE:
         res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                   LIR_OprDesc::double_type           |
                                   LIR_OprDesc::stack_value           |
                                   LIR_OprDesc::double_size);
         break;
       default:       ShouldNotReachHere(); res = illegalOpr;
     }
 #ifdef ASSERT
     assert(index >= 0, "index must be positive");
     assert(index <= (max_jint >> LIR_OprDesc::data_shift), "index is too big");
     LIR_Opr old_res = (LIR_Opr)(intptr_t)((index << LIR_OprDesc::data_shift) |
                                           LIR_OprDesc::stack_value           |
                                           as_OprType(type)                   |
                                           LIR_OprDesc::size_for(type));
     assert(res == old_res, "old and new method not equal");
 #endif
     return res;
   }
   static LIR_Opr intConst(jint i)                { return (LIR_Opr)(new LIR_Const(i)); }
   static LIR_Opr longConst(jlong l)              { return (LIR_Opr)(new LIR_Const(l)); }
   static LIR_Opr floatConst(jfloat f)            { return (LIR_Opr)(new LIR_Const(f)); }
   static LIR_Opr doubleConst(jdouble d)          { return (LIR_Opr)(new LIR_Const(d)); }
   static LIR_Opr oopConst(jobject o)             { return (LIR_Opr)(new LIR_Const(o)); }
   static LIR_Opr address(LIR_Address* a)         { return (LIR_Opr)a; }
   static LIR_Opr intptrConst(void* p)            { return (LIR_Opr)(new LIR_Const(p)); }
   static LIR_Opr intptrConst(intptr_t v)         { return (LIR_Opr)(new LIR_Const((void*)v)); }
   static LIR_Opr illegal()                       { return (LIR_Opr)-1; }
   static LIR_Opr addressConst(jint i)            { return (LIR_Opr)(new LIR_Const(i, true)); }
   static LIR_Opr value_type(ValueType* type);
   static LIR_Opr dummy_value_type(ValueType* type);
 };
 //-------------------------------------------------------------------------------
 //                   LIR Instructions
 //-------------------------------------------------------------------------------
 //
 // Note:
 //  - every instruction has a result operand
 //  - every instruction has an CodeEmitInfo operand (can be revisited later)
 //  - every instruction has a LIR_OpCode operand
 //  - LIR_OpN, means an instruction that has N input operands
 //
 // class hierarchy:
 //
 class  LIR_Op;
 class    LIR_Op0;
 class      LIR_OpLabel;
 class    LIR_Op1;
 class      LIR_OpBranch;
 class      LIR_OpConvert;
 class      LIR_OpAllocObj;
 class      LIR_OpRoundFP;
 class    LIR_Op2;
 class    LIR_OpDelay;
 class    LIR_Op3;
 class      LIR_OpAllocArray;
 class    LIR_OpCall;
 class      LIR_OpJavaCall;
 class      LIR_OpRTCall;
 class    LIR_OpArrayCopy;
 class    LIR_OpLock;
 class    LIR_OpTypeCheck;
 class    LIR_OpCompareAndSwap;
 class    LIR_OpProfileCall;
 // LIR operation codes
 enum LIR_Code {
     lir_none
   , begin_op0
       , lir_word_align
       , lir_label
       , lir_nop
       , lir_backwardbranch_target
       , lir_std_entry
       , lir_osr_entry
       , lir_build_frame
       , lir_fpop_raw
       , lir_24bit_FPU
       , lir_reset_FPU
       , lir_breakpoint
       , lir_rtcall
       , lir_membar
       , lir_membar_acquire
       , lir_membar_release
       , lir_get_thread
   , end_op0
   , begin_op1
       , lir_fxch
       , lir_fld
       , lir_ffree
       , lir_push
       , lir_pop
       , lir_null_check
       , lir_return
       , lir_leal
       , lir_neg
       , lir_branch
       , lir_cond_float_branch
       , lir_move
       , lir_prefetchr
       , lir_prefetchw
       , lir_convert
       , lir_alloc_object
       , lir_monaddr
       , lir_roundfp
       , lir_safepoint
       , lir_pack64
       , lir_unpack64
       , lir_unwind
   , end_op1
   , begin_op2
       , lir_cmp
       , lir_cmp_l2i
       , lir_ucmp_fd2i
       , lir_cmp_fd2i
       , lir_cmove
       , lir_add
       , lir_sub
       , lir_mul
       , lir_mul_strictfp
       , lir_div
       , lir_div_strictfp
       , lir_rem
       , lir_sqrt
       , lir_abs
       , lir_sin
       , lir_cos
       , lir_tan
       , lir_log
       , lir_log10
       , lir_logic_and
       , lir_logic_or
       , lir_logic_xor
       , lir_shl
       , lir_shr
       , lir_ushr
       , lir_alloc_array
       , lir_throw
       , lir_compare_to
   , end_op2
   , begin_op3
       , lir_idiv
       , lir_irem
   , end_op3
   , begin_opJavaCall
       , lir_static_call
       , lir_optvirtual_call
       , lir_icvirtual_call
       , lir_virtual_call
       , lir_dynamic_call
   , end_opJavaCall
   , begin_opArrayCopy
       , lir_arraycopy
   , end_opArrayCopy
   , begin_opLock
     , lir_lock
     , lir_unlock
   , end_opLock
   , begin_delay_slot
     , lir_delay_slot
   , end_delay_slot
   , begin_opTypeCheck
     , lir_instanceof
     , lir_checkcast
     , lir_store_check
   , end_opTypeCheck
   , begin_opCompareAndSwap
     , lir_cas_long
     , lir_cas_obj
     , lir_cas_int
   , end_opCompareAndSwap
   , begin_opMDOProfile
     , lir_profile_call
   , end_opMDOProfile
 };
 enum LIR_Condition {
     lir_cond_equal
   , lir_cond_notEqual
   , lir_cond_less
   , lir_cond_lessEqual
   , lir_cond_greaterEqual
   , lir_cond_greater
   , lir_cond_belowEqual
   , lir_cond_aboveEqual
   , lir_cond_always
   , lir_cond_unknown = -1
 };
 enum LIR_PatchCode {
   lir_patch_none,
   lir_patch_low,
   lir_patch_high,
   lir_patch_normal
 };
 enum LIR_MoveKind {
   lir_move_normal,
   lir_move_volatile,
   lir_move_unaligned,
   lir_move_wide,
   lir_move_max_flag
 };
 // --------------------------------------------------
 // LIR_Op
 // --------------------------------------------------
 class LIR_Op: public CompilationResourceObj {
  friend class LIR_OpVisitState;
 #ifdef ASSERT
  private:
   const char *  _file;
   int           _line;
 #endif
  protected:
   LIR_Opr       _result;
   unsigned short _code;
   unsigned short _flags;
   CodeEmitInfo* _info;
   int           _id;     // value id for register allocation
   int           _fpu_pop_count;
   Instruction*  _source; // for debugging
   static void print_condition(outputStream* out, LIR_Condition cond) PRODUCT_RETURN;
  protected:
   static bool is_in_range(LIR_Code test, LIR_Code start, LIR_Code end)  { return start < test && test < end; }
  public:
   LIR_Op()
     : _result(LIR_OprFact::illegalOpr)
     , _code(lir_none)
     , _flags(0)
     , _info(NULL)
 #ifdef ASSERT
     , _file(NULL)
     , _line(0)
 #endif
     , _fpu_pop_count(0)
     , _source(NULL)
     , _id(-1)                             {}
   LIR_Op(LIR_Code code, LIR_Opr result, CodeEmitInfo* info)
     : _result(result)
     , _code(code)
     , _flags(0)
     , _info(info)
 #ifdef ASSERT
     , _file(NULL)
     , _line(0)
 #endif
     , _fpu_pop_count(0)
     , _source(NULL)
     , _id(-1)                             {}
   CodeEmitInfo* info() const                  { return _info;   }
   LIR_Code code()      const                  { return (LIR_Code)_code;   }
   LIR_Opr result_opr() const                  { return _result; }
   void    set_result_opr(LIR_Opr opr)         { _result = opr;  }
 #ifdef ASSERT
   void set_file_and_line(const char * file, int line) {
     _file = file;
     _line = line;
   }
 #endif
   virtual const char * name() const PRODUCT_RETURN0;
   int id()             const                  { return _id;     }
   void set_id(int id)                         { _id = id; }
   // FPU stack simulation helpers -- only used on Intel
   void set_fpu_pop_count(int count)           { assert(count >= 0 && count <= 1, "currently only 0 and 1 are valid"); _fpu_pop_count = count; }
   int  fpu_pop_count() const                  { return _fpu_pop_count; }
   bool pop_fpu_stack()                        { return _fpu_pop_count > 0; }
   Instruction* source() const                 { return _source; }
   void set_source(Instruction* ins)           { _source = ins; }
   virtual void emit_code(LIR_Assembler* masm) = 0;
   virtual void print_instr(outputStream* out) const   = 0;
   virtual void print_on(outputStream* st) const PRODUCT_RETURN;
   virtual LIR_OpCall* as_OpCall() { return NULL; }
   virtual LIR_OpJavaCall* as_OpJavaCall() { return NULL; }
   virtual LIR_OpLabel* as_OpLabel() { return NULL; }
   virtual LIR_OpDelay* as_OpDelay() { return NULL; }
   virtual LIR_OpLock* as_OpLock() { return NULL; }
   virtual LIR_OpAllocArray* as_OpAllocArray() { return NULL; }
   virtual LIR_OpAllocObj* as_OpAllocObj() { return NULL; }
   virtual LIR_OpRoundFP* as_OpRoundFP() { return NULL; }
   virtual LIR_OpBranch* as_OpBranch() { return NULL; }
   virtual LIR_OpRTCall* as_OpRTCall() { return NULL; }
   virtual LIR_OpConvert* as_OpConvert() { return NULL; }
   virtual LIR_Op0* as_Op0() { return NULL; }
   virtual LIR_Op1* as_Op1() { return NULL; }
   virtual LIR_Op2* as_Op2() { return NULL; }
   virtual LIR_Op3* as_Op3() { return NULL; }
   virtual LIR_OpArrayCopy* as_OpArrayCopy() { return NULL; }
   virtual LIR_OpTypeCheck* as_OpTypeCheck() { return NULL; }
   virtual LIR_OpCompareAndSwap* as_OpCompareAndSwap() { return NULL; }
   virtual LIR_OpProfileCall* as_OpProfileCall() { return NULL; }
   virtual void verify() const {}
 };
 // for calls
 class LIR_OpCall: public LIR_Op {
  friend class LIR_OpVisitState;
  protected:
   address      _addr;
   LIR_OprList* _arguments;
  protected:
   LIR_OpCall(LIR_Code code, address addr, LIR_Opr result,
              LIR_OprList* arguments, CodeEmitInfo* info = NULL)
     : LIR_Op(code, result, info)
     , _arguments(arguments)
     , _addr(addr) {}
  public:
   address addr() const                           { return _addr; }
   const LIR_OprList* arguments() const           { return _arguments; }
   virtual LIR_OpCall* as_OpCall()                { return this; }
 };
 // --------------------------------------------------
 // LIR_OpJavaCall
 // --------------------------------------------------
 class LIR_OpJavaCall: public LIR_OpCall {
  friend class LIR_OpVisitState;
  private:
   ciMethod* _method;
   LIR_Opr   _receiver;
   LIR_Opr   _method_handle_invoke_SP_save_opr;  // Used in LIR_OpVisitState::visit to store the reference to FrameMap::method_handle_invoke_SP_save_opr.
  public:
   LIR_OpJavaCall(LIR_Code code, ciMethod* method,
                  LIR_Opr receiver, LIR_Opr result,
                  address addr, LIR_OprList* arguments,
                  CodeEmitInfo* info)
   : LIR_OpCall(code, addr, result, arguments, info)
   , _receiver(receiver)
   , _method(method)
   , _method_handle_invoke_SP_save_opr(LIR_OprFact::illegalOpr)
   { assert(is_in_range(code, begin_opJavaCall, end_opJavaCall), "code check"); }
   LIR_OpJavaCall(LIR_Code code, ciMethod* method,
                  LIR_Opr receiver, LIR_Opr result, intptr_t vtable_offset,
                  LIR_OprList* arguments, CodeEmitInfo* info)
   : LIR_OpCall(code, (address)vtable_offset, result, arguments, info)
   , _receiver(receiver)
   , _method(method)
   , _method_handle_invoke_SP_save_opr(LIR_OprFact::illegalOpr)
   { assert(is_in_range(code, begin_opJavaCall, end_opJavaCall), "code check"); }
   LIR_Opr receiver() const                       { return _receiver; }
   ciMethod* method() const                       { return _method;   }
   // JSR 292 support.
   bool is_invokedynamic() const                  { return code() == lir_dynamic_call; }
   bool is_method_handle_invoke() const {
     return
       is_invokedynamic()  // An invokedynamic is always a MethodHandle call site.
       ||
       (method()->holder()->name() == ciSymbol::java_dyn_MethodHandle() &&
        methodOopDesc::is_method_handle_invoke_name(method()->name()->sid()));
   }
   intptr_t vtable_offset() const {
     assert(_code == lir_virtual_call, "only have vtable for real vcall");
     return (intptr_t) addr();
   }
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_OpJavaCall* as_OpJavaCall() { return this; }
   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
 };
 // --------------------------------------------------
 // LIR_OpLabel
 // --------------------------------------------------
 // Location where a branch can continue
 class LIR_OpLabel: public LIR_Op {
  friend class LIR_OpVisitState;
  private:
   Label* _label;
  public:
   LIR_OpLabel(Label* lbl)
    : LIR_Op(lir_label, LIR_OprFact::illegalOpr, NULL)
    , _label(lbl)                                 {}
   Label* label() const                           { return _label; }
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_OpLabel* as_OpLabel() { return this; }
   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
 };
 // LIR_OpArrayCopy
 class LIR_OpArrayCopy: public LIR_Op {
  friend class LIR_OpVisitState;
  private:
   ArrayCopyStub*  _stub;
   LIR_Opr   _src;
   LIR_Opr   _src_pos;
   LIR_Opr   _dst;
   LIR_Opr   _dst_pos;
   LIR_Opr   _length;
   LIR_Opr   _tmp;
   ciArrayKlass* _expected_type;
   int       _flags;
 public:
   enum Flags {
     src_null_check         = 1 << 0,
     dst_null_check         = 1 << 1,
     src_pos_positive_check = 1 << 2,
     dst_pos_positive_check = 1 << 3,
     length_positive_check  = 1 << 4,
     src_range_check        = 1 << 5,
     dst_range_check        = 1 << 6,
     type_check             = 1 << 7,
     all_flags              = (1 << 8) - 1
   };
   LIR_OpArrayCopy(LIR_Opr src, LIR_Opr src_pos, LIR_Opr dst, LIR_Opr dst_pos, LIR_Opr length, LIR_Opr tmp,
                   ciArrayKlass* expected_type, int flags, CodeEmitInfo* info);
   LIR_Opr src() const                            { return _src; }
   LIR_Opr src_pos() const                        { return _src_pos; }
   LIR_Opr dst() const                            { return _dst; }
   LIR_Opr dst_pos() const                        { return _dst_pos; }
   LIR_Opr length() const                         { return _length; }
   LIR_Opr tmp() const                            { return _tmp; }
   int flags() const                              { return _flags; }
   ciArrayKlass* expected_type() const            { return _expected_type; }
   ArrayCopyStub* stub() const                    { return _stub; }
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_OpArrayCopy* as_OpArrayCopy() { return this; }
   void print_instr(outputStream* out) const PRODUCT_RETURN;
 };
 // --------------------------------------------------
 // LIR_Op0
 // --------------------------------------------------
 class LIR_Op0: public LIR_Op {
  friend class LIR_OpVisitState;
  public:
   LIR_Op0(LIR_Code code)
    : LIR_Op(code, LIR_OprFact::illegalOpr, NULL)  { assert(is_in_range(code, begin_op0, end_op0), "code check"); }
   LIR_Op0(LIR_Code code, LIR_Opr result, CodeEmitInfo* info = NULL)
    : LIR_Op(code, result, info)  { assert(is_in_range(code, begin_op0, end_op0), "code check"); }
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_Op0* as_Op0() { return this; }
   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
 };
 // --------------------------------------------------
 // LIR_Op1
 // --------------------------------------------------
 class LIR_Op1: public LIR_Op {
  friend class LIR_OpVisitState;
  protected:
   LIR_Opr         _opr;   // input operand
   BasicType       _type;  // Operand types
   LIR_PatchCode   _patch; // only required with patchin (NEEDS_CLEANUP: do we want a special instruction for patching?)
   static void print_patch_code(outputStream* out, LIR_PatchCode code);
   void set_kind(LIR_MoveKind kind) {
     assert(code() == lir_move, "must be");
     _flags = kind;
   }
  public:
   LIR_Op1(LIR_Code code, LIR_Opr opr, LIR_Opr result = LIR_OprFact::illegalOpr, BasicType type = T_ILLEGAL, LIR_PatchCode patch = lir_patch_none, CodeEmitInfo* info = NULL)
     : LIR_Op(code, result, info)
     , _opr(opr)
     , _patch(patch)
     , _type(type)                      { assert(is_in_range(code, begin_op1, end_op1), "code check"); }
   LIR_Op1(LIR_Code code, LIR_Opr opr, LIR_Opr result, BasicType type, LIR_PatchCode patch, CodeEmitInfo* info, LIR_MoveKind kind)
     : LIR_Op(code, result, info)
     , _opr(opr)
     , _patch(patch)
     , _type(type)                      {
     assert(code == lir_move, "must be");
     set_kind(kind);
   }
   LIR_Op1(LIR_Code code, LIR_Opr opr, CodeEmitInfo* info)
     : LIR_Op(code, LIR_OprFact::illegalOpr, info)
     , _opr(opr)
     , _patch(lir_patch_none)
     , _type(T_ILLEGAL)                 { assert(is_in_range(code, begin_op1, end_op1), "code check"); }
   LIR_Opr in_opr()           const               { return _opr;   }
   LIR_PatchCode patch_code() const               { return _patch; }
   BasicType type()           const               { return _type;  }
   LIR_MoveKind move_kind() const {
     assert(code() == lir_move, "must be");
     return (LIR_MoveKind)_flags;
   }
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_Op1* as_Op1() { return this; }
   virtual const char * name() const PRODUCT_RETURN0;
   void set_in_opr(LIR_Opr opr) { _opr = opr; }
   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
   virtual void verify() const;
 };
 // for runtime calls
 class LIR_OpRTCall: public LIR_OpCall {
  friend class LIR_OpVisitState;
  private:
   LIR_Opr _tmp;
  public:
   LIR_OpRTCall(address addr, LIR_Opr tmp,
                LIR_Opr result, LIR_OprList* arguments, CodeEmitInfo* info = NULL)
     : LIR_OpCall(lir_rtcall, addr, result, arguments, info)
     , _tmp(tmp) {}
   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_OpRTCall* as_OpRTCall() { return this; }
   LIR_Opr tmp() const                            { return _tmp; }
   virtual void verify() const;
 };
 class LIR_OpBranch: public LIR_Op {
  friend class LIR_OpVisitState;
  private:
   LIR_Condition _cond;
   BasicType     _type;
   Label*        _label;
   BlockBegin*   _block;  // if this is a branch to a block, this is the block
   BlockBegin*   _ublock; // if this is a float-branch, this is the unorderd block
   CodeStub*     _stub;   // if this is a branch to a stub, this is the stub
  public:
   LIR_OpBranch(LIR_Condition cond, Label* lbl)
     : LIR_Op(lir_branch, LIR_OprFact::illegalOpr, (CodeEmitInfo*) NULL)
     , _cond(cond)
     , _label(lbl)
     , _block(NULL)
     , _ublock(NULL)
     , _stub(NULL) { }
   LIR_OpBranch(LIR_Condition cond, BasicType type, BlockBegin* block);
   LIR_OpBranch(LIR_Condition cond, BasicType type, CodeStub* stub);
   // for unordered comparisons
   LIR_OpBranch(LIR_Condition cond, BasicType type, BlockBegin* block, BlockBegin* ublock);
   LIR_Condition cond()        const              { return _cond;        }
   BasicType     type()        const              { return _type;        }
   Label*        label()       const              { return _label;       }
   BlockBegin*   block()       const              { return _block;       }
   BlockBegin*   ublock()      const              { return _ublock;      }
   CodeStub*     stub()        const              { return _stub;       }
   void          change_block(BlockBegin* b);
   void          change_ublock(BlockBegin* b);
   void          negate_cond();
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_OpBranch* as_OpBranch() { return this; }
   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
 };
 class ConversionStub;
 class LIR_OpConvert: public LIR_Op1 {
  friend class LIR_OpVisitState;
  private:
    Bytecodes::Code _bytecode;
    ConversionStub* _stub;
 #ifdef PPC
   LIR_Opr _tmp1;
   LIR_Opr _tmp2;
 #endif
  public:
    LIR_OpConvert(Bytecodes::Code code, LIR_Opr opr, LIR_Opr result, ConversionStub* stub)
      : LIR_Op1(lir_convert, opr, result)
      , _stub(stub)
 #ifdef PPC
      , _tmp1(LIR_OprDesc::illegalOpr())
      , _tmp2(LIR_OprDesc::illegalOpr())
 #endif
      , _bytecode(code)                           {}
 #ifdef PPC
    LIR_OpConvert(Bytecodes::Code code, LIR_Opr opr, LIR_Opr result, ConversionStub* stub
                  ,LIR_Opr tmp1, LIR_Opr tmp2)
      : LIR_Op1(lir_convert, opr, result)
      , _stub(stub)
      , _tmp1(tmp1)
      , _tmp2(tmp2)
      , _bytecode(code)                           {}
 #endif
   Bytecodes::Code bytecode() const               { return _bytecode; }
   ConversionStub* stub() const                   { return _stub; }
 #ifdef PPC
   LIR_Opr tmp1() const                           { return _tmp1; }
   LIR_Opr tmp2() const                           { return _tmp2; }
 #endif
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_OpConvert* as_OpConvert() { return this; }
   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
   static void print_bytecode(outputStream* out, Bytecodes::Code code) PRODUCT_RETURN;
 };
 // LIR_OpAllocObj
 class LIR_OpAllocObj : public LIR_Op1 {
  friend class LIR_OpVisitState;
  private:
   LIR_Opr _tmp1;
   LIR_Opr _tmp2;
   LIR_Opr _tmp3;
   LIR_Opr _tmp4;
   int     _hdr_size;
   int     _obj_size;
   CodeStub* _stub;
   bool    _init_check;
  public:
   LIR_OpAllocObj(LIR_Opr klass, LIR_Opr result,
                  LIR_Opr t1, LIR_Opr t2, LIR_Opr t3, LIR_Opr t4,
                  int hdr_size, int obj_size, bool init_check, CodeStub* stub)
     : LIR_Op1(lir_alloc_object, klass, result)
     , _tmp1(t1)
     , _tmp2(t2)
     , _tmp3(t3)
     , _tmp4(t4)
     , _hdr_size(hdr_size)
     , _obj_size(obj_size)
     , _init_check(init_check)
     , _stub(stub)                                { }
   LIR_Opr klass()        const                   { return in_opr();     }
   LIR_Opr obj()          const                   { return result_opr(); }
   LIR_Opr tmp1()         const                   { return _tmp1;        }
   LIR_Opr tmp2()         const                   { return _tmp2;        }
   LIR_Opr tmp3()         const                   { return _tmp3;        }
   LIR_Opr tmp4()         const                   { return _tmp4;        }
   int     header_size()  const                   { return _hdr_size;    }
   int     object_size()  const                   { return _obj_size;    }
   bool    init_check()   const                   { return _init_check;  }
   CodeStub* stub()       const                   { return _stub;        }
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_OpAllocObj * as_OpAllocObj () { return this; }
   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
 };
 // LIR_OpRoundFP
 class LIR_OpRoundFP : public LIR_Op1 {
  friend class LIR_OpVisitState;
  private:
   LIR_Opr _tmp;
  public:
   LIR_OpRoundFP(LIR_Opr reg, LIR_Opr stack_loc_temp, LIR_Opr result)
     : LIR_Op1(lir_roundfp, reg, result)
     , _tmp(stack_loc_temp) {}
   LIR_Opr tmp() const                            { return _tmp; }
   virtual LIR_OpRoundFP* as_OpRoundFP()          { return this; }
   void print_instr(outputStream* out) const PRODUCT_RETURN;
 };
 // LIR_OpTypeCheck
 class LIR_OpTypeCheck: public LIR_Op {
  friend class LIR_OpVisitState;
  private:
   LIR_Opr       _object;
   LIR_Opr       _array;
   ciKlass*      _klass;
   LIR_Opr       _tmp1;
   LIR_Opr       _tmp2;
   LIR_Opr       _tmp3;
   bool          _fast_check;
   CodeEmitInfo* _info_for_patch;
   CodeEmitInfo* _info_for_exception;
   CodeStub*     _stub;
   ciMethod*     _profiled_method;
   int           _profiled_bci;
   bool          _should_profile;
 public:
   LIR_OpTypeCheck(LIR_Code code, LIR_Opr result, LIR_Opr object, ciKlass* klass,
                   LIR_Opr tmp1, LIR_Opr tmp2, LIR_Opr tmp3, bool fast_check,
                   CodeEmitInfo* info_for_exception, CodeEmitInfo* info_for_patch, CodeStub* stub);
   LIR_OpTypeCheck(LIR_Code code, LIR_Opr object, LIR_Opr array,
                   LIR_Opr tmp1, LIR_Opr tmp2, LIR_Opr tmp3, CodeEmitInfo* info_for_exception);
   LIR_Opr object() const                         { return _object;         }
   LIR_Opr array() const                          { assert(code() == lir_store_check, "not valid"); return _array;         }
   LIR_Opr tmp1() const                           { return _tmp1;           }
   LIR_Opr tmp2() const                           { return _tmp2;           }
   LIR_Opr tmp3() const                           { return _tmp3;           }
   ciKlass* klass() const                         { assert(code() == lir_instanceof || code() == lir_checkcast, "not valid"); return _klass;          }
   bool fast_check() const                        { assert(code() == lir_instanceof || code() == lir_checkcast, "not valid"); return _fast_check;     }
   CodeEmitInfo* info_for_patch() const           { return _info_for_patch;  }
   CodeEmitInfo* info_for_exception() const       { return _info_for_exception; }
   CodeStub* stub() const                         { return _stub;           }
   // methodDataOop profiling
   void set_profiled_method(ciMethod *method)     { _profiled_method = method; }
   void set_profiled_bci(int bci)                 { _profiled_bci = bci;       }
   void set_should_profile(bool b)                { _should_profile = b;       }
   ciMethod* profiled_method() const              { return _profiled_method;   }
   int       profiled_bci() const                 { return _profiled_bci;      }
   bool      should_profile() const               { return _should_profile;    }
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_OpTypeCheck* as_OpTypeCheck() { return this; }
   void print_instr(outputStream* out) const PRODUCT_RETURN;
 };
 // LIR_Op2
 class LIR_Op2: public LIR_Op {
  friend class LIR_OpVisitState;
   int  _fpu_stack_size; // for sin/cos implementation on Intel
  protected:
   LIR_Opr   _opr1;
   LIR_Opr   _opr2;
   BasicType _type;
   LIR_Opr   _tmp;
   LIR_Condition _condition;
   void verify() const;
  public:
   LIR_Op2(LIR_Code code, LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, CodeEmitInfo* info = NULL)
     : LIR_Op(code, LIR_OprFact::illegalOpr, info)
     , _opr1(opr1)
     , _opr2(opr2)
     , _type(T_ILLEGAL)
     , _condition(condition)
     , _fpu_stack_size(0)
     , _tmp(LIR_OprFact::illegalOpr) {
     assert(code == lir_cmp, "code check");
   }
   LIR_Op2(LIR_Code code, LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result)
     : LIR_Op(code, result, NULL)
     , _opr1(opr1)
     , _opr2(opr2)
     , _type(T_ILLEGAL)
     , _condition(condition)
     , _fpu_stack_size(0)
     , _tmp(LIR_OprFact::illegalOpr) {
     assert(code == lir_cmove, "code check");
   }
   LIR_Op2(LIR_Code code, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result = LIR_OprFact::illegalOpr,
           CodeEmitInfo* info = NULL, BasicType type = T_ILLEGAL)
     : LIR_Op(code, result, info)
     , _opr1(opr1)
     , _opr2(opr2)
     , _type(type)
     , _condition(lir_cond_unknown)
     , _fpu_stack_size(0)
     , _tmp(LIR_OprFact::illegalOpr) {
     assert(code != lir_cmp && is_in_range(code, begin_op2, end_op2), "code check");
   }
   LIR_Op2(LIR_Code code, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, LIR_Opr tmp)
     : LIR_Op(code, result, NULL)
     , _opr1(opr1)
     , _opr2(opr2)
     , _type(T_ILLEGAL)
     , _condition(lir_cond_unknown)
     , _fpu_stack_size(0)
     , _tmp(tmp) {
     assert(code != lir_cmp && is_in_range(code, begin_op2, end_op2), "code check");
   }
   LIR_Opr in_opr1() const                        { return _opr1; }
   LIR_Opr in_opr2() const                        { return _opr2; }
   BasicType type()  const                        { return _type; }
   LIR_Opr tmp_opr() const                        { return _tmp; }
   LIR_Condition condition() const  {
     assert(code() == lir_cmp || code() == lir_cmove, "only valid for cmp and cmove"); return _condition;
   }
   void set_condition(LIR_Condition condition) {
     assert(code() == lir_cmp || code() == lir_cmove, "only valid for cmp and cmove");  _condition = condition;
   }
   void set_fpu_stack_size(int size)              { _fpu_stack_size = size; }
   int  fpu_stack_size() const                    { return _fpu_stack_size; }
   void set_in_opr1(LIR_Opr opr)                  { _opr1 = opr; }
   void set_in_opr2(LIR_Opr opr)                  { _opr2 = opr; }
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_Op2* as_Op2() { return this; }
   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
 };
 class LIR_OpAllocArray : public LIR_Op {
  friend class LIR_OpVisitState;
  private:
   LIR_Opr   _klass;
   LIR_Opr   _len;
   LIR_Opr   _tmp1;
   LIR_Opr   _tmp2;
   LIR_Opr   _tmp3;
   LIR_Opr   _tmp4;
   BasicType _type;
   CodeStub* _stub;
  public:
   LIR_OpAllocArray(LIR_Opr klass, LIR_Opr len, LIR_Opr result, LIR_Opr t1, LIR_Opr t2, LIR_Opr t3, LIR_Opr t4, BasicType type, CodeStub* stub)
     : LIR_Op(lir_alloc_array, result, NULL)
     , _klass(klass)
     , _len(len)
     , _tmp1(t1)
     , _tmp2(t2)
     , _tmp3(t3)
     , _tmp4(t4)
     , _type(type)
     , _stub(stub) {}
   LIR_Opr   klass()   const                      { return _klass;       }
   LIR_Opr   len()     const                      { return _len;         }
   LIR_Opr   obj()     const                      { return result_opr(); }
   LIR_Opr   tmp1()    const                      { return _tmp1;        }
   LIR_Opr   tmp2()    const                      { return _tmp2;        }
   LIR_Opr   tmp3()    const                      { return _tmp3;        }
   LIR_Opr   tmp4()    const                      { return _tmp4;        }
   BasicType type()    const                      { return _type;        }
   CodeStub* stub()    const                      { return _stub;        }
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_OpAllocArray * as_OpAllocArray () { return this; }
   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
 };
 class LIR_Op3: public LIR_Op {
  friend class LIR_OpVisitState;
  private:
   LIR_Opr _opr1;
   LIR_Opr _opr2;
   LIR_Opr _opr3;
  public:
   LIR_Op3(LIR_Code code, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr opr3, LIR_Opr result, CodeEmitInfo* info = NULL)
     : LIR_Op(code, result, info)
     , _opr1(opr1)
     , _opr2(opr2)
     , _opr3(opr3)                                { assert(is_in_range(code, begin_op3, end_op3), "code check"); }
   LIR_Opr in_opr1() const                        { return _opr1; }
   LIR_Opr in_opr2() const                        { return _opr2; }
   LIR_Opr in_opr3() const                        { return _opr3; }
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_Op3* as_Op3() { return this; }
   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
 };
 //--------------------------------
 class LabelObj: public CompilationResourceObj {
  private:
   Label _label;
  public:
   LabelObj()                                     {}
   Label* label()                                 { return &_label; }
 };
 class LIR_OpLock: public LIR_Op {
  friend class LIR_OpVisitState;
  private:
   LIR_Opr _hdr;
   LIR_Opr _obj;
   LIR_Opr _lock;
   LIR_Opr _scratch;
   CodeStub* _stub;
  public:
   LIR_OpLock(LIR_Code code, LIR_Opr hdr, LIR_Opr obj, LIR_Opr lock, LIR_Opr scratch, CodeStub* stub, CodeEmitInfo* info)
     : LIR_Op(code, LIR_OprFact::illegalOpr, info)
     , _hdr(hdr)
     , _obj(obj)
     , _lock(lock)
     , _scratch(scratch)
     , _stub(stub)                      {}
   LIR_Opr hdr_opr() const                        { return _hdr; }
   LIR_Opr obj_opr() const                        { return _obj; }
   LIR_Opr lock_opr() const                       { return _lock; }
   LIR_Opr scratch_opr() const                    { return _scratch; }
   CodeStub* stub() const                         { return _stub; }
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_OpLock* as_OpLock() { return this; }
   void print_instr(outputStream* out) const PRODUCT_RETURN;
 };
 class LIR_OpDelay: public LIR_Op {
  friend class LIR_OpVisitState;
  private:
   LIR_Op* _op;
  public:
   LIR_OpDelay(LIR_Op* op, CodeEmitInfo* info):
     LIR_Op(lir_delay_slot, LIR_OprFact::illegalOpr, info),
     _op(op) {
     assert(op->code() == lir_nop || LIRFillDelaySlots, "should be filling with nops");
   }
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_OpDelay* as_OpDelay() { return this; }
   void print_instr(outputStream* out) const PRODUCT_RETURN;
   LIR_Op* delay_op() const { return _op; }
   CodeEmitInfo* call_info() const { return info(); }
 };
 // LIR_OpCompareAndSwap
 class LIR_OpCompareAndSwap : public LIR_Op {
  friend class LIR_OpVisitState;
  private:
   LIR_Opr _addr;
   LIR_Opr _cmp_value;
   LIR_Opr _new_value;
   LIR_Opr _tmp1;
   LIR_Opr _tmp2;
  public:
   LIR_OpCompareAndSwap(LIR_Code code, LIR_Opr addr, LIR_Opr cmp_value, LIR_Opr new_value,
                        LIR_Opr t1, LIR_Opr t2, LIR_Opr result)
     : LIR_Op(code, result, NULL)  // no result, no info
     , _addr(addr)
     , _cmp_value(cmp_value)
     , _new_value(new_value)
     , _tmp1(t1)
     , _tmp2(t2)                                  { }
   LIR_Opr addr()        const                    { return _addr;  }
   LIR_Opr cmp_value()   const                    { return _cmp_value; }
   LIR_Opr new_value()   const                    { return _new_value; }
   LIR_Opr tmp1()        const                    { return _tmp1;      }
   LIR_Opr tmp2()        const                    { return _tmp2;      }
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_OpCompareAndSwap * as_OpCompareAndSwap () { return this; }
   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
 };
 // LIR_OpProfileCall
 class LIR_OpProfileCall : public LIR_Op {
  friend class LIR_OpVisitState;
  private:
   ciMethod* _profiled_method;
   int _profiled_bci;
   LIR_Opr _mdo;
   LIR_Opr _recv;
   LIR_Opr _tmp1;
   ciKlass* _known_holder;
  public:
   // Destroys recv
   LIR_OpProfileCall(LIR_Code code, ciMethod* profiled_method, int profiled_bci, LIR_Opr mdo, LIR_Opr recv, LIR_Opr t1, ciKlass* known_holder)
     : LIR_Op(code, LIR_OprFact::illegalOpr, NULL)  // no result, no info
     , _profiled_method(profiled_method)
     , _profiled_bci(profiled_bci)
     , _mdo(mdo)
     , _recv(recv)
     , _tmp1(t1)
     , _known_holder(known_holder)                { }
   ciMethod* profiled_method() const              { return _profiled_method;  }
   int       profiled_bci()    const              { return _profiled_bci;     }
   LIR_Opr   mdo()             const              { return _mdo;              }
   LIR_Opr   recv()            const              { return _recv;             }
   LIR_Opr   tmp1()            const              { return _tmp1;             }
   ciKlass*  known_holder()    const              { return _known_holder;     }
   virtual void emit_code(LIR_Assembler* masm);
   virtual LIR_OpProfileCall* as_OpProfileCall() { return this; }
   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
 };
 class LIR_InsertionBuffer;
 //--------------------------------LIR_List---------------------------------------------------
 // Maintains a list of LIR instructions (one instance of LIR_List per basic block)
 // The LIR instructions are appended by the LIR_List class itself;
 //
 // Notes:
 // - all offsets are(should be) in bytes
 // - local positions are specified with an offset, with offset 0 being local 0
 class LIR_List: public CompilationResourceObj {
  private:
   LIR_OpList  _operations;
   Compilation*  _compilation;
 #ifndef PRODUCT
   BlockBegin*   _block;
 #endif
 #ifdef ASSERT
   const char *  _file;
   int           _line;
 #endif
   void append(LIR_Op* op) {
     if (op->source() == NULL)
       op->set_source(_compilation->current_instruction());
 #ifndef PRODUCT
     if (PrintIRWithLIR) {
       _compilation->maybe_print_current_instruction();
       op->print(); tty->cr();
     }
 #endif // PRODUCT
     _operations.append(op);
 #ifdef ASSERT
     op->verify();
     op->set_file_and_line(_file, _line);
     _file = NULL;
     _line = 0;
 #endif
   }
  public:
   LIR_List(Compilation* compilation, BlockBegin* block = NULL);
 #ifdef ASSERT
   void set_file_and_line(const char * file, int line);
 #endif
   //---------- accessors ---------------
   LIR_OpList* instructions_list()                { return &_operations; }
   int         length() const                     { return _operations.length(); }
   LIR_Op*     at(int i) const                    { return _operations.at(i); }
   NOT_PRODUCT(BlockBegin* block() const          { return _block; });
   // insert LIR_Ops in buffer to right places in LIR_List
   void append(LIR_InsertionBuffer* buffer);
   //---------- mutators ---------------
   void insert_before(int i, LIR_List* op_list)   { _operations.insert_before(i, op_list->instructions_list()); }
   void insert_before(int i, LIR_Op* op)          { _operations.insert_before(i, op); }
   void remove_at(int i)                          { _operations.remove_at(i); }
   //---------- printing -------------
   void print_instructions() PRODUCT_RETURN;
   //---------- instructions -------------
   void call_opt_virtual(ciMethod* method, LIR_Opr receiver, LIR_Opr result,
                         address dest, LIR_OprList* arguments,
                         CodeEmitInfo* info) {
     append(new LIR_OpJavaCall(lir_optvirtual_call, method, receiver, result, dest, arguments, info));
   }
   void call_static(ciMethod* method, LIR_Opr result,
                    address dest, LIR_OprList* arguments, CodeEmitInfo* info) {
     append(new LIR_OpJavaCall(lir_static_call, method, LIR_OprFact::illegalOpr, result, dest, arguments, info));
   }
   void call_icvirtual(ciMethod* method, LIR_Opr receiver, LIR_Opr result,
                       address dest, LIR_OprList* arguments, CodeEmitInfo* info) {
     append(new LIR_OpJavaCall(lir_icvirtual_call, method, receiver, result, dest, arguments, info));
   }
   void call_virtual(ciMethod* method, LIR_Opr receiver, LIR_Opr result,
                     intptr_t vtable_offset, LIR_OprList* arguments, CodeEmitInfo* info) {
     append(new LIR_OpJavaCall(lir_virtual_call, method, receiver, result, vtable_offset, arguments, info));
   }
   void call_dynamic(ciMethod* method, LIR_Opr receiver, LIR_Opr result,
                     address dest, LIR_OprList* arguments, CodeEmitInfo* info) {
     append(new LIR_OpJavaCall(lir_dynamic_call, method, receiver, result, dest, arguments, info));
   }
   void get_thread(LIR_Opr result)                { append(new LIR_Op0(lir_get_thread, result)); }
   void word_align()                              { append(new LIR_Op0(lir_word_align)); }
   void membar()                                  { append(new LIR_Op0(lir_membar)); }
   void membar_acquire()                          { append(new LIR_Op0(lir_membar_acquire)); }
   void membar_release()                          { append(new LIR_Op0(lir_membar_release)); }
   void nop()                                     { append(new LIR_Op0(lir_nop)); }
   void build_frame()                             { append(new LIR_Op0(lir_build_frame)); }
   void std_entry(LIR_Opr receiver)               { append(new LIR_Op0(lir_std_entry, receiver)); }
   void osr_entry(LIR_Opr osrPointer)             { append(new LIR_Op0(lir_osr_entry, osrPointer)); }
   void branch_destination(Label* lbl)            { append(new LIR_OpLabel(lbl)); }
   void negate(LIR_Opr from, LIR_Opr to)          { append(new LIR_Op1(lir_neg, from, to)); }
   void leal(LIR_Opr from, LIR_Opr result_reg)    { append(new LIR_Op1(lir_leal, from, result_reg)); }
   // result is a stack location for old backend and vreg for UseLinearScan
   // stack_loc_temp is an illegal register for old backend
   void roundfp(LIR_Opr reg, LIR_Opr stack_loc_temp, LIR_Opr result) { append(new LIR_OpRoundFP(reg, stack_loc_temp, result)); }
   void unaligned_move(LIR_Address* src, LIR_Opr dst) { append(new LIR_Op1(lir_move, LIR_OprFact::address(src), dst, dst->type(), lir_patch_none, NULL, lir_move_unaligned)); }
   void unaligned_move(LIR_Opr src, LIR_Address* dst) { append(new LIR_Op1(lir_move, src, LIR_OprFact::address(dst), src->type(), lir_patch_none, NULL, lir_move_unaligned)); }
   void unaligned_move(LIR_Opr src, LIR_Opr dst) { append(new LIR_Op1(lir_move, src, dst, dst->type(), lir_patch_none, NULL, lir_move_unaligned)); }
   void move(LIR_Opr src, LIR_Opr dst, CodeEmitInfo* info = NULL) { append(new LIR_Op1(lir_move, src, dst, dst->type(), lir_patch_none, info)); }
   void move(LIR_Address* src, LIR_Opr dst, CodeEmitInfo* info = NULL) { append(new LIR_Op1(lir_move, LIR_OprFact::address(src), dst, src->type(), lir_patch_none, info)); }
   void move(LIR_Opr src, LIR_Address* dst, CodeEmitInfo* info = NULL) { append(new LIR_Op1(lir_move, src, LIR_OprFact::address(dst), dst->type(), lir_patch_none, info)); }
   void move_wide(LIR_Address* src, LIR_Opr dst, CodeEmitInfo* info = NULL) {
     if (UseCompressedOops) {
       append(new LIR_Op1(lir_move, LIR_OprFact::address(src), dst, src->type(), lir_patch_none, info, lir_move_wide));
     } else {
       move(src, dst, info);
     }
   }
   void move_wide(LIR_Opr src, LIR_Address* dst, CodeEmitInfo* info = NULL) {
     if (UseCompressedOops) {
       append(new LIR_Op1(lir_move, src, LIR_OprFact::address(dst), dst->type(), lir_patch_none, info, lir_move_wide));
     } else {
       move(src, dst, info);
     }
   }
   void volatile_move(LIR_Opr src, LIR_Opr dst, BasicType type, CodeEmitInfo* info = NULL, LIR_PatchCode patch_code = lir_patch_none) { append(new LIR_Op1(lir_move, src, dst, type, patch_code, info, lir_move_volatile)); }
   void oop2reg  (jobject o, LIR_Opr reg)         { append(new LIR_Op1(lir_move, LIR_OprFact::oopConst(o),    reg));   }
   void oop2reg_patch(jobject o, LIR_Opr reg, CodeEmitInfo* info);
   void return_op(LIR_Opr result)                 { append(new LIR_Op1(lir_return, result)); }
   void safepoint(LIR_Opr tmp, CodeEmitInfo* info)  { append(new LIR_Op1(lir_safepoint, tmp, info)); }
 #ifdef PPC
   void convert(Bytecodes::Code code, LIR_Opr left, LIR_Opr dst, LIR_Opr tmp1, LIR_Opr tmp2) { append(new LIR_OpConvert(code, left, dst, NULL, tmp1, tmp2)); }
 #endif
   void convert(Bytecodes::Code code, LIR_Opr left, LIR_Opr dst, ConversionStub* stub = NULL/*, bool is_32bit = false*/) { append(new LIR_OpConvert(code, left, dst, stub)); }
   void logical_and (LIR_Opr left, LIR_Opr right, LIR_Opr dst) { append(new LIR_Op2(lir_logic_and,  left, right, dst)); }
   void logical_or  (LIR_Opr left, LIR_Opr right, LIR_Opr dst) { append(new LIR_Op2(lir_logic_or,   left, right, dst)); }
   void logical_xor (LIR_Opr left, LIR_Opr right, LIR_Opr dst) { append(new LIR_Op2(lir_logic_xor,  left, right, dst)); }
   void   pack64(LIR_Opr src, LIR_Opr dst) { append(new LIR_Op1(lir_pack64,   src, dst, T_LONG, lir_patch_none, NULL)); }
   void unpack64(LIR_Opr src, LIR_Opr dst) { append(new LIR_Op1(lir_unpack64, src, dst, T_LONG, lir_patch_none, NULL)); }
   void null_check(LIR_Opr opr, CodeEmitInfo* info)         { append(new LIR_Op1(lir_null_check, opr, info)); }
   void throw_exception(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) {
     append(new LIR_Op2(lir_throw, exceptionPC, exceptionOop, LIR_OprFact::illegalOpr, info));
   }
   void unwind_exception(LIR_Opr exceptionOop) {
     append(new LIR_Op1(lir_unwind, exceptionOop));
   }
   void compare_to (LIR_Opr left, LIR_Opr right, LIR_Opr dst) {
     append(new LIR_Op2(lir_compare_to,  left, right, dst));
   }
   void push(LIR_Opr opr)                                   { append(new LIR_Op1(lir_push, opr)); }
   void pop(LIR_Opr reg)                                    { append(new LIR_Op1(lir_pop,  reg)); }
   void cmp(LIR_Condition condition, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info = NULL) {
     append(new LIR_Op2(lir_cmp, condition, left, right, info));
   }
   void cmp(LIR_Condition condition, LIR_Opr left, int right, CodeEmitInfo* info = NULL) {
     cmp(condition, left, LIR_OprFact::intConst(right), info);
   }
   void cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info);
   void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Address* addr, CodeEmitInfo* info);
   void cmove(LIR_Condition condition, LIR_Opr src1, LIR_Opr src2, LIR_Opr dst) {
     append(new LIR_Op2(lir_cmove, condition, src1, src2, dst));
   }
   void cas_long(LIR_Opr addr, LIR_Opr cmp_value, LIR_Opr new_value,
                 LIR_Opr t1, LIR_Opr t2, LIR_Opr result = LIR_OprFact::illegalOpr);
   void cas_obj(LIR_Opr addr, LIR_Opr cmp_value, LIR_Opr new_value,
                LIR_Opr t1, LIR_Opr t2, LIR_Opr result = LIR_OprFact::illegalOpr);
   void cas_int(LIR_Opr addr, LIR_Opr cmp_value, LIR_Opr new_value,
                LIR_Opr t1, LIR_Opr t2, LIR_Opr result = LIR_OprFact::illegalOpr);
   void abs (LIR_Opr from, LIR_Opr to, LIR_Opr tmp)                { append(new LIR_Op2(lir_abs , from, tmp, to)); }
   void sqrt(LIR_Opr from, LIR_Opr to, LIR_Opr tmp)                { append(new LIR_Op2(lir_sqrt, from, tmp, to)); }
   void log (LIR_Opr from, LIR_Opr to, LIR_Opr tmp)                { append(new LIR_Op2(lir_log,  from, LIR_OprFact::illegalOpr, to, tmp)); }
   void log10 (LIR_Opr from, LIR_Opr to, LIR_Opr tmp)              { append(new LIR_Op2(lir_log10, from, LIR_OprFact::illegalOpr, to, tmp)); }
   void sin (LIR_Opr from, LIR_Opr to, LIR_Opr tmp1, LIR_Opr tmp2) { append(new LIR_Op2(lir_sin , from, tmp1, to, tmp2)); }
   void cos (LIR_Opr from, LIR_Opr to, LIR_Opr tmp1, LIR_Opr tmp2) { append(new LIR_Op2(lir_cos , from, tmp1, to, tmp2)); }
   void tan (LIR_Opr from, LIR_Opr to, LIR_Opr tmp1, LIR_Opr tmp2) { append(new LIR_Op2(lir_tan , from, tmp1, to, tmp2)); }
   void add (LIR_Opr left, LIR_Opr right, LIR_Opr res)      { append(new LIR_Op2(lir_add, left, right, res)); }
   void sub (LIR_Opr left, LIR_Opr right, LIR_Opr res, CodeEmitInfo* info = NULL) { append(new LIR_Op2(lir_sub, left, right, res, info)); }
   void mul (LIR_Opr left, LIR_Opr right, LIR_Opr res) { append(new LIR_Op2(lir_mul, left, right, res)); }
   void mul_strictfp (LIR_Opr left, LIR_Opr right, LIR_Opr res, LIR_Opr tmp) { append(new LIR_Op2(lir_mul_strictfp, left, right, res, tmp)); }
   void div (LIR_Opr left, LIR_Opr right, LIR_Opr res, CodeEmitInfo* info = NULL)      { append(new LIR_Op2(lir_div, left, right, res, info)); }
   void div_strictfp (LIR_Opr left, LIR_Opr right, LIR_Opr res, LIR_Opr tmp) { append(new LIR_Op2(lir_div_strictfp, left, right, res, tmp)); }
   void rem (LIR_Opr left, LIR_Opr right, LIR_Opr res, CodeEmitInfo* info = NULL)      { append(new LIR_Op2(lir_rem, left, right, res, info)); }
   void volatile_load_mem_reg(LIR_Address* address, LIR_Opr dst, CodeEmitInfo* info, LIR_PatchCode patch_code = lir_patch_none);
   void volatile_load_unsafe_reg(LIR_Opr base, LIR_Opr offset, LIR_Opr dst, BasicType type, CodeEmitInfo* info, LIR_PatchCode patch_code);
   void load(LIR_Address* addr, LIR_Opr src, CodeEmitInfo* info = NULL, LIR_PatchCode patch_code = lir_patch_none);
   void prefetch(LIR_Address* addr, bool is_store);
   void store_mem_int(jint v,    LIR_Opr base, int offset_in_bytes, BasicType type, CodeEmitInfo* info, LIR_PatchCode patch_code = lir_patch_none);
   void store_mem_oop(jobject o, LIR_Opr base, int offset_in_bytes, BasicType type, CodeEmitInfo* info, LIR_PatchCode patch_code = lir_patch_none);
   void store(LIR_Opr src, LIR_Address* addr, CodeEmitInfo* info = NULL, LIR_PatchCode patch_code = lir_patch_none);
   void volatile_store_mem_reg(LIR_Opr src, LIR_Address* address, CodeEmitInfo* info, LIR_PatchCode patch_code = lir_patch_none);
   void volatile_store_unsafe_reg(LIR_Opr src, LIR_Opr base, LIR_Opr offset, BasicType type, CodeEmitInfo* info, LIR_PatchCode patch_code);
   void idiv(LIR_Opr left, LIR_Opr right, LIR_Opr res, LIR_Opr tmp, CodeEmitInfo* info);
   void idiv(LIR_Opr left, int   right, LIR_Opr res, LIR_Opr tmp, CodeEmitInfo* info);
   void irem(LIR_Opr left, LIR_Opr right, LIR_Opr res, LIR_Opr tmp, CodeEmitInfo* info);
   void irem(LIR_Opr left, int   right, LIR_Opr res, LIR_Opr tmp, CodeEmitInfo* info);
   void allocate_object(LIR_Opr dst, LIR_Opr t1, LIR_Opr t2, LIR_Opr t3, LIR_Opr t4, int header_size, int object_size, LIR_Opr klass, bool init_check, CodeStub* stub);
   void allocate_array(LIR_Opr dst, LIR_Opr len, LIR_Opr t1,LIR_Opr t2, LIR_Opr t3,LIR_Opr t4, BasicType type, LIR_Opr klass, CodeStub* stub);
   // jump is an unconditional branch
   void jump(BlockBegin* block) {
     append(new LIR_OpBranch(lir_cond_always, T_ILLEGAL, block));
   }
   void jump(CodeStub* stub) {
     append(new LIR_OpBranch(lir_cond_always, T_ILLEGAL, stub));
   }
   void branch(LIR_Condition cond, Label* lbl)        { append(new LIR_OpBranch(cond, lbl)); }
   void branch(LIR_Condition cond, BasicType type, BlockBegin* block) {
     assert(type != T_FLOAT && type != T_DOUBLE, "no fp comparisons");
     append(new LIR_OpBranch(cond, type, block));
   }
   void branch(LIR_Condition cond, BasicType type, CodeStub* stub)    {
     assert(type != T_FLOAT && type != T_DOUBLE, "no fp comparisons");
     append(new LIR_OpBranch(cond, type, stub));
   }
   void branch(LIR_Condition cond, BasicType type, BlockBegin* block, BlockBegin* unordered) {
     assert(type == T_FLOAT || type == T_DOUBLE, "fp comparisons only");
     append(new LIR_OpBranch(cond, type, block, unordered));
   }
   void shift_left(LIR_Opr value, LIR_Opr count, LIR_Opr dst, LIR_Opr tmp);
   void shift_right(LIR_Opr value, LIR_Opr count, LIR_Opr dst, LIR_Opr tmp);
   void unsigned_shift_right(LIR_Opr value, LIR_Opr count, LIR_Opr dst, LIR_Opr tmp);
   void shift_left(LIR_Opr value, int count, LIR_Opr dst)       { shift_left(value, LIR_OprFact::intConst(count), dst, LIR_OprFact::illegalOpr); }
   void shift_right(LIR_Opr value, int count, LIR_Opr dst)      { shift_right(value, LIR_OprFact::intConst(count), dst, LIR_OprFact::illegalOpr); }
   void unsigned_shift_right(LIR_Opr value, int count, LIR_Opr dst) { unsigned_shift_right(value, LIR_OprFact::intConst(count), dst, LIR_OprFact::illegalOpr); }
   void lcmp2int(LIR_Opr left, LIR_Opr right, LIR_Opr dst)        { append(new LIR_Op2(lir_cmp_l2i,  left, right, dst)); }
   void fcmp2int(LIR_Opr left, LIR_Opr right, LIR_Opr dst, bool is_unordered_less);
   void call_runtime_leaf(address routine, LIR_Opr tmp, LIR_Opr result, LIR_OprList* arguments) {
     append(new LIR_OpRTCall(routine, tmp, result, arguments));
   }
   void call_runtime(address routine, LIR_Opr tmp, LIR_Opr result,
                     LIR_OprList* arguments, CodeEmitInfo* info) {
     append(new LIR_OpRTCall(routine, tmp, result, arguments, info));
   }
   void load_stack_address_monitor(int monitor_ix, LIR_Opr dst)  { append(new LIR_Op1(lir_monaddr, LIR_OprFact::intConst(monitor_ix), dst)); }
   void unlock_object(LIR_Opr hdr, LIR_Opr obj, LIR_Opr lock, LIR_Opr scratch, CodeStub* stub);
   void lock_object(LIR_Opr hdr, LIR_Opr obj, LIR_Opr lock, LIR_Opr scratch, CodeStub* stub, CodeEmitInfo* info);
   void set_24bit_fpu()                                               { append(new LIR_Op0(lir_24bit_FPU )); }
   void restore_fpu()                                                 { append(new LIR_Op0(lir_reset_FPU )); }
   void breakpoint()                                                  { append(new LIR_Op0(lir_breakpoint)); }
   void arraycopy(LIR_Opr src, LIR_Opr src_pos, LIR_Opr dst, LIR_Opr dst_pos, LIR_Opr length, LIR_Opr tmp, ciArrayKlass* expected_type, int flags, CodeEmitInfo* info) { append(new LIR_OpArrayCopy(src, src_pos, dst, dst_pos, length, tmp, expected_type, flags, info)); }
   void fpop_raw()                                { append(new LIR_Op0(lir_fpop_raw)); }
   void instanceof(LIR_Opr result, LIR_Opr object, ciKlass* klass, LIR_Opr tmp1, LIR_Opr tmp2, LIR_Opr tmp3, bool fast_check, CodeEmitInfo* info_for_patch, ciMethod* profiled_method, int profiled_bci);
   void store_check(LIR_Opr object, LIR_Opr array, LIR_Opr tmp1, LIR_Opr tmp2, LIR_Opr tmp3, CodeEmitInfo* info_for_exception);
   void checkcast (LIR_Opr result, LIR_Opr object, ciKlass* klass,
                   LIR_Opr tmp1, LIR_Opr tmp2, LIR_Opr tmp3, bool fast_check,
                   CodeEmitInfo* info_for_exception, CodeEmitInfo* info_for_patch, CodeStub* stub,
                   ciMethod* profiled_method, int profiled_bci);
   // methodDataOop profiling
   void profile_call(ciMethod* method, int bci, LIR_Opr mdo, LIR_Opr recv, LIR_Opr t1, ciKlass* cha_klass) {
     append(new LIR_OpProfileCall(lir_profile_call, method, bci, mdo, recv, t1, cha_klass));
   }
 };
 void print_LIR(BlockList* blocks);
 class LIR_InsertionBuffer : public CompilationResourceObj {
  private:
   LIR_List*   _lir;   // the lir list where ops of this buffer should be inserted later (NULL when uninitialized)
   // list of insertion points. index and count are stored alternately:
   // _index_and_count[i * 2]:     the index into lir list where "count" ops should be inserted
   // _index_and_count[i * 2 + 1]: the number of ops to be inserted at index
   intStack    _index_and_count;
   // the LIR_Ops to be inserted
   LIR_OpList  _ops;
   void append_new(int index, int count)  { _index_and_count.append(index); _index_and_count.append(count); }
   void set_index_at(int i, int value)    { _index_and_count.at_put((i << 1),     value); }
   void set_count_at(int i, int value)    { _index_and_count.at_put((i << 1) + 1, value); }
 #ifdef ASSERT
   void verify();
 #endif
  public:
   LIR_InsertionBuffer() : _lir(NULL), _index_and_count(8), _ops(8) { }
   // must be called before using the insertion buffer
   void init(LIR_List* lir)  { assert(!initialized(), "already initialized"); _lir = lir; _index_and_count.clear(); _ops.clear(); }
   bool initialized() const  { return _lir != NULL; }
   // called automatically when the buffer is appended to the LIR_List
   void finish()             { _lir = NULL; }
   // accessors
   LIR_List*  lir_list() const             { return _lir; }
   int number_of_insertion_points() const  { return _index_and_count.length() >> 1; }
   int index_at(int i) const               { return _index_and_count.at((i << 1));     }
   int count_at(int i) const               { return _index_and_count.at((i << 1) + 1); }
   int number_of_ops() const               { return _ops.length(); }
   LIR_Op* op_at(int i) const              { return _ops.at(i); }
   // append an instruction to the buffer
   void append(int index, LIR_Op* op);
   // instruction
   void move(int index, LIR_Opr src, LIR_Opr dst, CodeEmitInfo* info = NULL) { append(index, new LIR_Op1(lir_move, src, dst, dst->type(), lir_patch_none, info)); }
 };
 //
 // LIR_OpVisitState is used for manipulating LIR_Ops in an abstract way.
 // Calling a LIR_Op's visit function with a LIR_OpVisitState causes
 // information about the input, output and temporaries used by the
 // op to be recorded.  It also records whether the op has call semantics
 // and also records all the CodeEmitInfos used by this op.
 //
 class LIR_OpVisitState: public StackObj {
  public:
   typedef enum { inputMode, firstMode = inputMode, tempMode, outputMode, numModes, invalidMode = -1 } OprMode;
   enum {
     maxNumberOfOperands = 16,
     maxNumberOfInfos = 4
   };
  private:
   LIR_Op*          _op;
   // optimization: the operands and infos are not stored in a variable-length
   //               list, but in a fixed-size array to save time of size checks and resizing
   int              _oprs_len[numModes];
   LIR_Opr*         _oprs_new[numModes][maxNumberOfOperands];
   int _info_len;
   CodeEmitInfo*    _info_new[maxNumberOfInfos];
   bool             _has_call;
   bool             _has_slow_case;
   // only include register operands
   // addresses are decomposed to the base and index registers
   // constants and stack operands are ignored
   void append(LIR_Opr& opr, OprMode mode) {
     assert(opr->is_valid(), "should not call this otherwise");
     assert(mode >= 0 && mode < numModes, "bad mode");
     if (opr->is_register()) {
        assert(_oprs_len[mode] < maxNumberOfOperands, "array overflow");
       _oprs_new[mode][_oprs_len[mode]++] = &opr;
     } else if (opr->is_pointer()) {
       LIR_Address* address = opr->as_address_ptr();
       if (address != NULL) {
         // special handling for addresses: add base and index register of the address
         // both are always input operands!
         if (address->_base->is_valid()) {
           assert(address->_base->is_register(), "must be");
           assert(_oprs_len[inputMode] < maxNumberOfOperands, "array overflow");
           _oprs_new[inputMode][_oprs_len[inputMode]++] = &address->_base;
         }
         if (address->_index->is_valid()) {
           assert(address->_index->is_register(), "must be");
           assert(_oprs_len[inputMode] < maxNumberOfOperands, "array overflow");
           _oprs_new[inputMode][_oprs_len[inputMode]++] = &address->_index;
         }
       } else {
         assert(opr->is_constant(), "constant operands are not processed");
       }
     } else {
       assert(opr->is_stack(), "stack operands are not processed");
     }
   }
   void append(CodeEmitInfo* info) {
     assert(info != NULL, "should not call this otherwise");
     assert(_info_len < maxNumberOfInfos, "array overflow");
     _info_new[_info_len++] = info;
   }
  public:
   LIR_OpVisitState()         { reset(); }
   LIR_Op* op() const         { return _op; }
   void set_op(LIR_Op* op)    { reset(); _op = op; }
   bool has_call() const      { return _has_call; }
   bool has_slow_case() const { return _has_slow_case; }
   void reset() {
     _op = NULL;
     _has_call = false;
     _has_slow_case = false;
     _oprs_len[inputMode] = 0;
     _oprs_len[tempMode] = 0;
     _oprs_len[outputMode] = 0;
     _info_len = 0;
   }
   int opr_count(OprMode mode) const {
     assert(mode >= 0 && mode < numModes, "bad mode");
     return _oprs_len[mode];
   }
   LIR_Opr opr_at(OprMode mode, int index) const {
     assert(mode >= 0 && mode < numModes, "bad mode");
     assert(index >= 0 && index < _oprs_len[mode], "index out of bound");
     return *_oprs_new[mode][index];
   }
   void set_opr_at(OprMode mode, int index, LIR_Opr opr) const {
     assert(mode >= 0 && mode < numModes, "bad mode");
     assert(index >= 0 && index < _oprs_len[mode], "index out of bound");
     *_oprs_new[mode][index] = opr;
   }
   int info_count() const {
     return _info_len;
   }
   CodeEmitInfo* info_at(int index) const {
     assert(index < _info_len, "index out of bounds");
     return _info_new[index];
   }
   XHandlers* all_xhandler();
   // collects all register operands of the instruction
   void visit(LIR_Op* op);
 #if ASSERT
   // check that an operation has no operands
   bool no_operands(LIR_Op* op);
 #endif
   // LIR_Op visitor functions use these to fill in the state
   void do_input(LIR_Opr& opr)             { append(opr, LIR_OpVisitState::inputMode); }
   void do_output(LIR_Opr& opr)            { append(opr, LIR_OpVisitState::outputMode); }
   void do_temp(LIR_Opr& opr)              { append(opr, LIR_OpVisitState::tempMode); }
   void do_info(CodeEmitInfo* info)        { append(info); }
   void do_stub(CodeStub* stub);
   void do_call()                          { _has_call = true; }
   void do_slow_case()                     { _has_slow_case = true; }
   void do_slow_case(CodeEmitInfo* info) {
     _has_slow_case = true;
     append(info);
   }
 };
 inline LIR_Opr LIR_OprDesc::illegalOpr()   { return LIR_OprFact::illegalOpr; };
 #endif // SHARE_VM_C1_C1_LIR_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/c1/c1_LIR.hpp@ac637b7220d1 (annotated)

src/share/vm/c1/c1_LIR.hpp