1 /*
   2  * Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_C1_C1_LIR_HPP
  26 #define SHARE_C1_C1_LIR_HPP
  27 
  28 #include "c1/c1_Defs.hpp"
  29 #include "c1/c1_ValueType.hpp"
  30 #include "oops/method.hpp"
  31 #include "utilities/globalDefinitions.hpp"
  32 
  33 class BlockBegin;
  34 class BlockList;
  35 class LIR_Assembler;
  36 class CodeEmitInfo;
  37 class CodeStub;
  38 class CodeStubList;
  39 class C1SafepointPollStub;
  40 class ArrayCopyStub;
  41 class LIR_Op;
  42 class ciType;
  43 class ValueType;
  44 class LIR_OpVisitState;
  45 class FpuStackSim;
  46 
  47 //---------------------------------------------------------------------
  48 //                 LIR Operands
  49 //    LIR_OprPtr
  50 //      LIR_Const
  51 //      LIR_Address
  52 //---------------------------------------------------------------------
  53 class LIR_OprPtr;
  54 class LIR_Const;
  55 class LIR_Address;
  56 class LIR_OprVisitor;
  57 class LIR_Opr;
  58 
  59 typedef int          RegNr;
  60 
  61 typedef GrowableArray<LIR_Opr> LIR_OprList;
  62 typedef GrowableArray<LIR_Op*> LIR_OpArray;
  63 typedef GrowableArray<LIR_Op*> LIR_OpList;
  64 
  65 // define LIR_OprPtr early so LIR_Opr can refer to it
  66 class LIR_OprPtr: public CompilationResourceObj {
  67  public:
  68   bool is_oop_pointer() const                    { return (type() == T_OBJECT); }
  69   bool is_float_kind() const                     { BasicType t = type(); return (t == T_FLOAT) || (t == T_DOUBLE); }
  70 
  71   virtual LIR_Const*  as_constant()              { return NULL; }
  72   virtual LIR_Address* as_address()              { return NULL; }
  73   virtual BasicType type() const                 = 0;
  74   virtual void print_value_on(outputStream* out) const = 0;
  75 };
  76 
  77 
  78 
  79 // LIR constants
  80 class LIR_Const: public LIR_OprPtr {
  81  private:
  82   JavaValue _value;
  83 
  84   void type_check(BasicType t) const   { assert(type() == t, "type check"); }
  85   void type_check(BasicType t1, BasicType t2) const   { assert(type() == t1 || type() == t2, "type check"); }
  86   void type_check(BasicType t1, BasicType t2, BasicType t3) const   { assert(type() == t1 || type() == t2 || type() == t3, "type check"); }
  87 
  88  public:
  89   LIR_Const(jint i, bool is_address=false)       { _value.set_type(is_address?T_ADDRESS:T_INT); _value.set_jint(i); }
  90   LIR_Const(jlong l)                             { _value.set_type(T_LONG);    _value.set_jlong(l); }
  91   LIR_Const(jfloat f)                            { _value.set_type(T_FLOAT);   _value.set_jfloat(f); }
  92   LIR_Const(jdouble d)                           { _value.set_type(T_DOUBLE);  _value.set_jdouble(d); }
  93   LIR_Const(jobject o)                           { _value.set_type(T_OBJECT);  _value.set_jobject(o); }
  94   LIR_Const(void* p) {
  95 #ifdef _LP64
  96     assert(sizeof(jlong) >= sizeof(p), "too small");;
  97     _value.set_type(T_LONG);    _value.set_jlong((jlong)p);
  98 #else
  99     assert(sizeof(jint) >= sizeof(p), "too small");;
 100     _value.set_type(T_INT);     _value.set_jint((jint)p);
 101 #endif
 102   }
 103   LIR_Const(Metadata* m) {
 104     _value.set_type(T_METADATA);
 105 #ifdef _LP64
 106     _value.set_jlong((jlong)m);
 107 #else
 108     _value.set_jint((jint)m);
 109 #endif // _LP64
 110   }
 111 
 112   virtual BasicType type()       const { return _value.get_type(); }
 113   virtual LIR_Const* as_constant()     { return this; }
 114 
 115   jint      as_jint()    const         { type_check(T_INT, T_ADDRESS); return _value.get_jint(); }
 116   jlong     as_jlong()   const         { type_check(T_LONG  ); return _value.get_jlong(); }
 117   jfloat    as_jfloat()  const         { type_check(T_FLOAT ); return _value.get_jfloat(); }
 118   jdouble   as_jdouble() const         { type_check(T_DOUBLE); return _value.get_jdouble(); }
 119   jobject   as_jobject() const         { type_check(T_OBJECT); return _value.get_jobject(); }
 120   jint      as_jint_lo() const         { type_check(T_LONG  ); return low(_value.get_jlong()); }
 121   jint      as_jint_hi() const         { type_check(T_LONG  ); return high(_value.get_jlong()); }
 122 
 123 #ifdef _LP64
 124   address   as_pointer() const         { type_check(T_LONG  ); return (address)_value.get_jlong(); }
 125   Metadata* as_metadata() const        { type_check(T_METADATA); return (Metadata*)_value.get_jlong(); }
 126 #else
 127   address   as_pointer() const         { type_check(T_INT   ); return (address)_value.get_jint(); }
 128   Metadata* as_metadata() const        { type_check(T_METADATA); return (Metadata*)_value.get_jint(); }
 129 #endif
 130 
 131 
 132   jint      as_jint_bits() const       { type_check(T_FLOAT, T_INT, T_ADDRESS); return _value.get_jint(); }
 133   jint      as_jint_lo_bits() const    {
 134     if (type() == T_DOUBLE) {
 135       return low(jlong_cast(_value.get_jdouble()));
 136     } else {
 137       return as_jint_lo();
 138     }
 139   }
 140   jint      as_jint_hi_bits() const    {
 141     if (type() == T_DOUBLE) {
 142       return high(jlong_cast(_value.get_jdouble()));
 143     } else {
 144       return as_jint_hi();
 145     }
 146   }
 147   jlong      as_jlong_bits() const    {
 148     if (type() == T_DOUBLE) {
 149       return jlong_cast(_value.get_jdouble());
 150     } else {
 151       return as_jlong();
 152     }
 153   }
 154 
 155   virtual void print_value_on(outputStream* out) const PRODUCT_RETURN;
 156 
 157 
 158   bool is_zero_float() {
 159     jfloat f = as_jfloat();
 160     jfloat ok = 0.0f;
 161     return jint_cast(f) == jint_cast(ok);
 162   }
 163 
 164   bool is_one_float() {
 165     jfloat f = as_jfloat();
 166     return !g_isnan(f) && g_isfinite(f) && f == 1.0;
 167   }
 168 
 169   bool is_zero_double() {
 170     jdouble d = as_jdouble();
 171     jdouble ok = 0.0;
 172     return jlong_cast(d) == jlong_cast(ok);
 173   }
 174 
 175   bool is_one_double() {
 176     jdouble d = as_jdouble();
 177     return !g_isnan(d) && g_isfinite(d) && d == 1.0;
 178   }
 179 };
 180 
 181 
 182 //---------------------LIR Operand descriptor------------------------------------
 183 //
 184 // The class LIR_Opr represents a LIR instruction operand;
 185 // it can be a register (ALU/FPU), stack location or a constant;
 186 // Constants and addresses are represented as resource area allocated
 187 // structures (see above), and pointers are stored in the _value field (cast to
 188 // an intptr_t).
 189 // Registers and stack locations are represented inline as integers.
 190 // (see value function).
 191 
 192 // Previously, this class was derived from CompilationResourceObj.
 193 // However, deriving from any of the "Obj" types in allocation.hpp seems
 194 // detrimental, since in some build modes it would add a vtable to this class,
 195 // which make it no longer be a 1-word trivially-copyable wrapper object,
 196 // which is the entire point of it.
 197 
 198 class LIR_Opr {
 199  public:
 200   // value structure:
 201   //          data        other-non-data opr-type opr-kind
 202   // +-------------------+--------------+-------+-----+
 203   // [max...............................|6 5 4 3|2 1 0]
 204   //                                                 ^
 205   //                                           is_pointer bit
 206   //
 207   // lowest bit cleared, means it is a structure pointer
 208   // we need 4 bits to represent types
 209 
 210  private:
 211   friend class LIR_OprFact;
 212 
 213   intptr_t _value;
 214   // Conversion
 215   intptr_t value() const                         { return _value; }
 216 
 217   bool check_value_mask(intptr_t mask, intptr_t masked_value) const {
 218     return (value() & mask) == masked_value;
 219   }
 220 
 221   enum OprKind {
 222       pointer_value      = 0
 223     , stack_value        = 1
 224     , cpu_register       = 3
 225     , fpu_register       = 5
 226     , illegal_value      = 7
 227   };
 228 
 229   enum OprBits {
 230       pointer_bits   = 1
 231     , kind_bits      = 3
 232     , type_bits      = 4
 233     , size_bits      = 2
 234     , destroys_bits  = 1
 235     , virtual_bits   = 1
 236     , is_xmm_bits    = 1
 237     , last_use_bits  = 1
 238     , is_fpu_stack_offset_bits = 1        // used in assertion checking on x86 for FPU stack slot allocation
 239     , non_data_bits  = kind_bits + type_bits + size_bits + destroys_bits + virtual_bits
 240                        + is_xmm_bits + last_use_bits + is_fpu_stack_offset_bits
 241     , data_bits      = BitsPerInt - non_data_bits
 242     , reg_bits       = data_bits / 2      // for two registers in one value encoding
 243   };
 244 
 245   enum OprShift : uintptr_t {
 246       kind_shift     = 0
 247     , type_shift     = kind_shift     + kind_bits
 248     , size_shift     = type_shift     + type_bits
 249     , destroys_shift = size_shift     + size_bits
 250     , last_use_shift = destroys_shift + destroys_bits
 251     , is_fpu_stack_offset_shift = last_use_shift + last_use_bits
 252     , virtual_shift  = is_fpu_stack_offset_shift + is_fpu_stack_offset_bits
 253     , is_xmm_shift   = virtual_shift + virtual_bits
 254     , data_shift     = is_xmm_shift + is_xmm_bits
 255     , reg1_shift = data_shift
 256     , reg2_shift = data_shift + reg_bits
 257 
 258   };
 259 
 260   enum OprSize {
 261       single_size = 0 << size_shift
 262     , double_size = 1 << size_shift
 263   };
 264 
 265   enum OprMask {
 266       kind_mask      = right_n_bits(kind_bits)
 267     , type_mask      = right_n_bits(type_bits) << type_shift
 268     , size_mask      = right_n_bits(size_bits) << size_shift
 269     , last_use_mask  = right_n_bits(last_use_bits) << last_use_shift
 270     , is_fpu_stack_offset_mask = right_n_bits(is_fpu_stack_offset_bits) << is_fpu_stack_offset_shift
 271     , virtual_mask   = right_n_bits(virtual_bits) << virtual_shift
 272     , is_xmm_mask    = right_n_bits(is_xmm_bits) << is_xmm_shift
 273     , pointer_mask   = right_n_bits(pointer_bits)
 274     , lower_reg_mask = right_n_bits(reg_bits)
 275     , no_type_mask   = (int)(~(type_mask | last_use_mask | is_fpu_stack_offset_mask))
 276   };
 277 
 278   uint32_t data() const                          { return (uint32_t)value() >> data_shift; }
 279   int lo_reg_half() const                        { return data() & lower_reg_mask; }
 280   int hi_reg_half() const                        { return (data() >> reg_bits) & lower_reg_mask; }
 281   OprKind kind_field() const                     { return (OprKind)(value() & kind_mask); }
 282   OprSize size_field() const                     { return (OprSize)(value() & size_mask); }
 283 
 284   static char type_char(BasicType t);
 285 
 286  public:
 287   LIR_Opr() : _value(0) {}
 288   LIR_Opr(intptr_t val) : _value(val) {}
 289   LIR_Opr(LIR_OprPtr *val) : _value(reinterpret_cast<intptr_t>(val)) {}
 290   bool operator==(const LIR_Opr &other) const { return _value == other._value; }
 291   bool operator!=(const LIR_Opr &other) const { return _value != other._value; }
 292   explicit operator bool() const { return _value != 0; }
 293 
 294   // UGLY HACK: make this value object look like a pointer (to itself). This
 295   // operator overload should be removed, and all callers updated from
 296   // `opr->fn()` to `opr.fn()`.
 297   const LIR_Opr* operator->() const { return this; }
 298   LIR_Opr* operator->() { return this; }
 299 
 300   enum {
 301     vreg_base = ConcreteRegisterImpl::number_of_registers,
 302     data_max = (1 << data_bits) - 1,      // max unsigned value for data bit field
 303     vreg_limit =  10000,                  // choose a reasonable limit,
 304     vreg_max = MIN2(vreg_limit, data_max) // and make sure if fits in the bit field
 305   };
 306 
 307   static inline LIR_Opr illegalOpr();
 308   static inline LIR_Opr nullOpr();
 309 
 310   enum OprType {
 311       unknown_type  = 0 << type_shift    // means: not set (catch uninitialized types)
 312     , int_type      = 1 << type_shift
 313     , long_type     = 2 << type_shift
 314     , object_type   = 3 << type_shift
 315     , address_type  = 4 << type_shift
 316     , float_type    = 5 << type_shift
 317     , double_type   = 6 << type_shift
 318     , metadata_type = 7 << type_shift
 319   };
 320   friend OprType as_OprType(BasicType t);
 321   friend BasicType as_BasicType(OprType t);
 322 
 323   OprType type_field_valid() const               { assert(is_register() || is_stack(), "should not be called otherwise"); return (OprType)(value() & type_mask); }
 324   OprType type_field() const                     { return is_illegal() ? unknown_type : (OprType)(value() & type_mask); }
 325 
 326   static OprSize size_for(BasicType t) {
 327     switch (t) {
 328       case T_LONG:
 329       case T_DOUBLE:
 330         return double_size;
 331         break;
 332 
 333       case T_FLOAT:
 334       case T_BOOLEAN:
 335       case T_CHAR:
 336       case T_BYTE:
 337       case T_SHORT:
 338       case T_INT:
 339       case T_ADDRESS:
 340       case T_OBJECT:
 341       case T_PRIMITIVE_OBJECT:
 342       case T_ARRAY:
 343       case T_METADATA:
 344         return single_size;
 345         break;
 346 
 347       default:
 348         ShouldNotReachHere();
 349         return single_size;
 350       }
 351   }
 352 
 353 
 354   void validate_type() const PRODUCT_RETURN;
 355 
 356   BasicType type() const {
 357     if (is_pointer()) {
 358       return pointer()->type();
 359     }
 360     return as_BasicType(type_field());
 361   }
 362 
 363 
 364   ValueType* value_type() const                  { return as_ValueType(type()); }
 365 
 366   char type_char() const                         { return type_char((is_pointer()) ? pointer()->type() : type()); }
 367 
 368   bool is_equal(LIR_Opr opr) const         { return *this == opr; }
 369   // checks whether types are same
 370   bool is_same_type(LIR_Opr opr) const     {
 371     assert(type_field() != unknown_type &&
 372            opr->type_field() != unknown_type, "shouldn't see unknown_type");
 373     return type_field() == opr->type_field();
 374   }
 375   bool is_same_register(LIR_Opr opr) {
 376     return (is_register() && opr->is_register() &&
 377             kind_field() == opr->kind_field() &&
 378             (value() & no_type_mask) == (opr->value() & no_type_mask));
 379   }
 380 
 381   bool is_pointer() const      { return check_value_mask(pointer_mask, pointer_value); }
 382   bool is_illegal() const      { return kind_field() == illegal_value; }
 383   bool is_valid() const        { return kind_field() != illegal_value; }
 384 
 385   bool is_register() const     { return is_cpu_register() || is_fpu_register(); }
 386   bool is_virtual() const      { return is_virtual_cpu()  || is_virtual_fpu();  }
 387 
 388   bool is_constant() const     { return is_pointer() && pointer()->as_constant() != NULL; }
 389   bool is_address() const      { return is_pointer() && pointer()->as_address() != NULL; }
 390 
 391   bool is_float_kind() const   { return is_pointer() ? pointer()->is_float_kind() : (kind_field() == fpu_register); }
 392   bool is_oop() const;
 393 
 394   // semantic for fpu- and xmm-registers:
 395   // * is_float and is_double return true for xmm_registers
 396   //   (so is_single_fpu and is_single_xmm are true)
 397   // * So you must always check for is_???_xmm prior to is_???_fpu to
 398   //   distinguish between fpu- and xmm-registers
 399 
 400   bool is_stack() const        { validate_type(); return check_value_mask(kind_mask,                stack_value);                 }
 401   bool is_single_stack() const { validate_type(); return check_value_mask(kind_mask | size_mask,    stack_value  | single_size);  }
 402   bool is_double_stack() const { validate_type(); return check_value_mask(kind_mask | size_mask,    stack_value  | double_size);  }
 403 
 404   bool is_cpu_register() const { validate_type(); return check_value_mask(kind_mask,                cpu_register);                }
 405   bool is_virtual_cpu() const  { validate_type(); return check_value_mask(kind_mask | virtual_mask, cpu_register | virtual_mask); }
 406   bool is_fixed_cpu() const    { validate_type(); return check_value_mask(kind_mask | virtual_mask, cpu_register);                }
 407   bool is_single_cpu() const   { validate_type(); return check_value_mask(kind_mask | size_mask,    cpu_register | single_size);  }
 408   bool is_double_cpu() const   { validate_type(); return check_value_mask(kind_mask | size_mask,    cpu_register | double_size);  }
 409 
 410   bool is_fpu_register() const { validate_type(); return check_value_mask(kind_mask,                fpu_register);                }
 411   bool is_virtual_fpu() const  { validate_type(); return check_value_mask(kind_mask | virtual_mask, fpu_register | virtual_mask); }
 412   bool is_fixed_fpu() const    { validate_type(); return check_value_mask(kind_mask | virtual_mask, fpu_register);                }
 413   bool is_single_fpu() const   { validate_type(); return check_value_mask(kind_mask | size_mask,    fpu_register | single_size);  }
 414   bool is_double_fpu() const   { validate_type(); return check_value_mask(kind_mask | size_mask,    fpu_register | double_size);  }
 415 
 416   bool is_xmm_register() const { validate_type(); return check_value_mask(kind_mask | is_xmm_mask,             fpu_register | is_xmm_mask); }
 417   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); }
 418   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); }
 419 
 420   // fast accessor functions for special bits that do not work for pointers
 421   // (in this functions, the check for is_pointer() is omitted)
 422   bool is_single_word() const      { assert(is_register() || is_stack(), "type check"); return check_value_mask(size_mask, single_size); }
 423   bool is_double_word() const      { assert(is_register() || is_stack(), "type check"); return check_value_mask(size_mask, double_size); }
 424   bool is_virtual_register() const { assert(is_register(),               "type check"); return check_value_mask(virtual_mask, virtual_mask); }
 425   bool is_oop_register() const     { assert(is_register() || is_stack(), "type check"); return type_field_valid() == object_type; }
 426   BasicType type_register() const  { assert(is_register() || is_stack(), "type check"); return as_BasicType(type_field_valid());  }
 427 
 428   bool is_last_use() const         { assert(is_register(), "only works for registers"); return (value() & last_use_mask) != 0; }
 429   bool is_fpu_stack_offset() const { assert(is_register(), "only works for registers"); return (value() & is_fpu_stack_offset_mask) != 0; }
 430   LIR_Opr make_last_use()          { assert(is_register(), "only works for registers"); return (LIR_Opr)(value() | last_use_mask); }
 431   LIR_Opr make_fpu_stack_offset()  { assert(is_register(), "only works for registers"); return (LIR_Opr)(value() | is_fpu_stack_offset_mask); }
 432 
 433 
 434   int single_stack_ix() const  { assert(is_single_stack() && !is_virtual(), "type check"); return (int)data(); }
 435   int double_stack_ix() const  { assert(is_double_stack() && !is_virtual(), "type check"); return (int)data(); }
 436   RegNr cpu_regnr() const      { assert(is_single_cpu()   && !is_virtual(), "type check"); return (RegNr)data(); }
 437   RegNr cpu_regnrLo() const    { assert(is_double_cpu()   && !is_virtual(), "type check"); return (RegNr)lo_reg_half(); }
 438   RegNr cpu_regnrHi() const    { assert(is_double_cpu()   && !is_virtual(), "type check"); return (RegNr)hi_reg_half(); }
 439   RegNr fpu_regnr() const      { assert(is_single_fpu()   && !is_virtual(), "type check"); return (RegNr)data(); }
 440   RegNr fpu_regnrLo() const    { assert(is_double_fpu()   && !is_virtual(), "type check"); return (RegNr)lo_reg_half(); }
 441   RegNr fpu_regnrHi() const    { assert(is_double_fpu()   && !is_virtual(), "type check"); return (RegNr)hi_reg_half(); }
 442   RegNr xmm_regnr() const      { assert(is_single_xmm()   && !is_virtual(), "type check"); return (RegNr)data(); }
 443   RegNr xmm_regnrLo() const    { assert(is_double_xmm()   && !is_virtual(), "type check"); return (RegNr)lo_reg_half(); }
 444   RegNr xmm_regnrHi() const    { assert(is_double_xmm()   && !is_virtual(), "type check"); return (RegNr)hi_reg_half(); }
 445   int   vreg_number() const    { assert(is_virtual(),                       "type check"); return (RegNr)data(); }
 446 
 447   LIR_OprPtr* pointer() const { assert(_value != 0 && is_pointer(), "nullness and type check"); return (LIR_OprPtr*)_value; }
 448   LIR_Const* as_constant_ptr() const             { return pointer()->as_constant(); }
 449   LIR_Address* as_address_ptr() const            { return pointer()->as_address(); }
 450 
 451   Register as_register()    const;
 452   Register as_register_lo() const;
 453   Register as_register_hi() const;
 454 
 455   Register as_pointer_register() {
 456 #ifdef _LP64
 457     if (is_double_cpu()) {
 458       assert(as_register_lo() == as_register_hi(), "should be a single register");
 459       return as_register_lo();
 460     }
 461 #endif
 462     return as_register();
 463   }
 464 
 465   FloatRegister as_float_reg   () const;
 466   FloatRegister as_double_reg  () const;
 467 #ifdef X86
 468   XMMRegister as_xmm_float_reg () const;
 469   XMMRegister as_xmm_double_reg() const;
 470   // for compatibility with RInfo
 471   int fpu() const { return lo_reg_half(); }
 472 #endif
 473 
 474   jint      as_jint()    const { return as_constant_ptr()->as_jint(); }
 475   jlong     as_jlong()   const { return as_constant_ptr()->as_jlong(); }
 476   jfloat    as_jfloat()  const { return as_constant_ptr()->as_jfloat(); }
 477   jdouble   as_jdouble() const { return as_constant_ptr()->as_jdouble(); }
 478   jobject   as_jobject() const { return as_constant_ptr()->as_jobject(); }
 479 
 480   void print() const PRODUCT_RETURN;
 481   void print(outputStream* out) const PRODUCT_RETURN;
 482 };
 483 
 484 inline LIR_Opr::OprType as_OprType(BasicType type) {
 485   switch (type) {
 486   case T_INT:      return LIR_Opr::int_type;
 487   case T_LONG:     return LIR_Opr::long_type;
 488   case T_FLOAT:    return LIR_Opr::float_type;
 489   case T_DOUBLE:   return LIR_Opr::double_type;
 490   case T_OBJECT:
 491   case T_PRIMITIVE_OBJECT:
 492   case T_ARRAY:    return LIR_Opr::object_type;
 493   case T_ADDRESS:  return LIR_Opr::address_type;
 494   case T_METADATA: return LIR_Opr::metadata_type;
 495   case T_ILLEGAL:  // fall through
 496   default: ShouldNotReachHere(); return LIR_Opr::unknown_type;
 497   }
 498 }
 499 
 500 inline BasicType as_BasicType(LIR_Opr::OprType t) {
 501   switch (t) {
 502   case LIR_Opr::int_type:     return T_INT;
 503   case LIR_Opr::long_type:    return T_LONG;
 504   case LIR_Opr::float_type:   return T_FLOAT;
 505   case LIR_Opr::double_type:  return T_DOUBLE;
 506   case LIR_Opr::object_type:  return T_OBJECT;
 507   case LIR_Opr::address_type: return T_ADDRESS;
 508   case LIR_Opr::metadata_type:return T_METADATA;
 509   case LIR_Opr::unknown_type: // fall through
 510   default: ShouldNotReachHere();  return T_ILLEGAL;
 511   }
 512 }
 513 
 514 
 515 // LIR_Address
 516 class LIR_Address: public LIR_OprPtr {
 517  friend class LIR_OpVisitState;
 518 
 519  public:
 520   // NOTE: currently these must be the log2 of the scale factor (and
 521   // must also be equivalent to the ScaleFactor enum in
 522   // assembler_i486.hpp)
 523   enum Scale {
 524     times_1  =  0,
 525     times_2  =  1,
 526     times_4  =  2,
 527     times_8  =  3
 528   };
 529 
 530  private:
 531   LIR_Opr   _base;
 532   LIR_Opr   _index;
 533   Scale     _scale;
 534   intx      _disp;
 535   BasicType _type;
 536 
 537  public:
 538   LIR_Address(LIR_Opr base, LIR_Opr index, BasicType type):
 539        _base(base)
 540      , _index(index)
 541      , _scale(times_1)
 542      , _disp(0)
 543      , _type(type) { verify(); }
 544 
 545   LIR_Address(LIR_Opr base, intx disp, BasicType type):
 546        _base(base)
 547      , _index(LIR_Opr::illegalOpr())
 548      , _scale(times_1)
 549      , _disp(disp)
 550      , _type(type) { verify(); }
 551 
 552   LIR_Address(LIR_Opr base, BasicType type):
 553        _base(base)
 554      , _index(LIR_Opr::illegalOpr())
 555      , _scale(times_1)
 556      , _disp(0)
 557      , _type(type) { verify(); }
 558 
 559   LIR_Address(LIR_Opr base, LIR_Opr index, intx disp, BasicType type):
 560        _base(base)
 561      , _index(index)
 562      , _scale(times_1)
 563      , _disp(disp)
 564      , _type(type) { verify(); }
 565 
 566   LIR_Address(LIR_Opr base, LIR_Opr index, Scale scale, intx disp, BasicType type):
 567        _base(base)
 568      , _index(index)
 569      , _scale(scale)
 570      , _disp(disp)
 571      , _type(type) { verify(); }
 572 
 573   LIR_Opr base()  const                          { return _base;  }
 574   LIR_Opr index() const                          { return _index; }
 575   Scale   scale() const                          { return _scale; }
 576   intx    disp()  const                          { return _disp;  }
 577 
 578   bool equals(LIR_Address* other) const          { return base() == other->base() && index() == other->index() && disp() == other->disp() && scale() == other->scale(); }
 579 
 580   virtual LIR_Address* as_address()              { return this;   }
 581   virtual BasicType type() const                 { return _type; }
 582   virtual void print_value_on(outputStream* out) const PRODUCT_RETURN;
 583 
 584   void verify() const PRODUCT_RETURN;
 585 
 586   static Scale scale(BasicType type);
 587 };
 588 
 589 
 590 // operand factory
 591 class LIR_OprFact: public AllStatic {
 592  public:
 593 
 594   static LIR_Opr illegalOpr;
 595   static LIR_Opr nullOpr;
 596 
 597   static LIR_Opr single_cpu(int reg) {
 598     return (LIR_Opr)(intptr_t)((reg  << LIR_Opr::reg1_shift) |
 599                                LIR_Opr::int_type             |
 600                                LIR_Opr::cpu_register         |
 601                                LIR_Opr::single_size);
 602   }
 603   static LIR_Opr single_cpu_oop(int reg) {
 604     return (LIR_Opr)(intptr_t)((reg  << LIR_Opr::reg1_shift) |
 605                                LIR_Opr::object_type          |
 606                                LIR_Opr::cpu_register         |
 607                                LIR_Opr::single_size);
 608   }
 609   static LIR_Opr single_cpu_address(int reg) {
 610     return (LIR_Opr)(intptr_t)((reg  << LIR_Opr::reg1_shift) |
 611                                LIR_Opr::address_type         |
 612                                LIR_Opr::cpu_register         |
 613                                LIR_Opr::single_size);
 614   }
 615   static LIR_Opr single_cpu_metadata(int reg) {
 616     return (LIR_Opr)(intptr_t)((reg  << LIR_Opr::reg1_shift) |
 617                                LIR_Opr::metadata_type        |
 618                                LIR_Opr::cpu_register         |
 619                                LIR_Opr::single_size);
 620   }
 621   static LIR_Opr double_cpu(int reg1, int reg2) {
 622     LP64_ONLY(assert(reg1 == reg2, "must be identical"));
 623     return (LIR_Opr)(intptr_t)((reg1 << LIR_Opr::reg1_shift) |
 624                                (reg2 << LIR_Opr::reg2_shift) |
 625                                LIR_Opr::long_type            |
 626                                LIR_Opr::cpu_register         |
 627                                LIR_Opr::double_size);
 628   }
 629 
 630   static LIR_Opr single_fpu(int reg) {
 631     return (LIR_Opr)(intptr_t)((reg  << LIR_Opr::reg1_shift) |
 632                                LIR_Opr::float_type           |
 633                                LIR_Opr::fpu_register         |
 634                                LIR_Opr::single_size);
 635   }
 636 
 637   // Platform dependent.
 638   static LIR_Opr double_fpu(int reg1, int reg2 = -1 /*fnoreg*/);
 639 
 640 #ifdef ARM32
 641   static LIR_Opr single_softfp(int reg) {
 642     return (LIR_Opr)(intptr_t)((reg  << LIR_Opr::reg1_shift) |
 643                                LIR_Opr::float_type           |
 644                                LIR_Opr::cpu_register         |
 645                                LIR_Opr::single_size);
 646   }
 647   static LIR_Opr double_softfp(int reg1, int reg2) {
 648     return (LIR_Opr)(intptr_t)((reg1 << LIR_Opr::reg1_shift) |
 649                                (reg2 << LIR_Opr::reg2_shift) |
 650                                LIR_Opr::double_type          |
 651                                LIR_Opr::cpu_register         |
 652                                LIR_Opr::double_size);
 653   }
 654 #endif // ARM32
 655 
 656 #if defined(X86)
 657   static LIR_Opr single_xmm(int reg) {
 658     return (LIR_Opr)(intptr_t)((reg << LIR_Opr::reg1_shift) |
 659                                LIR_Opr::float_type          |
 660                                LIR_Opr::fpu_register        |
 661                                LIR_Opr::single_size         |
 662                                LIR_Opr::is_xmm_mask);
 663   }
 664   static LIR_Opr double_xmm(int reg) {
 665     return (LIR_Opr)(intptr_t)((reg << LIR_Opr::reg1_shift) |
 666                                (reg << LIR_Opr::reg2_shift) |
 667                                LIR_Opr::double_type         |
 668                                LIR_Opr::fpu_register        |
 669                                LIR_Opr::double_size         |
 670                                LIR_Opr::is_xmm_mask);
 671   }
 672 #endif // X86
 673 
 674   static LIR_Opr virtual_register(int index, BasicType type) {
 675     if (index > LIR_Opr::vreg_max) {
 676       // Running out of virtual registers. Caller should bailout.
 677       return illegalOpr;
 678     }
 679 
 680     LIR_Opr res;
 681     switch (type) {
 682       case T_OBJECT: // fall through
 683       case T_PRIMITIVE_OBJECT: // fall through
 684       case T_ARRAY:
 685         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift)  |
 686                                             LIR_Opr::object_type  |
 687                                             LIR_Opr::cpu_register |
 688                                             LIR_Opr::single_size  |
 689                                             LIR_Opr::virtual_mask);
 690         break;
 691 
 692       case T_METADATA:
 693         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift)  |
 694                                             LIR_Opr::metadata_type|
 695                                             LIR_Opr::cpu_register |
 696                                             LIR_Opr::single_size  |
 697                                             LIR_Opr::virtual_mask);
 698         break;
 699 
 700       case T_INT:
 701         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 702                                   LIR_Opr::int_type              |
 703                                   LIR_Opr::cpu_register          |
 704                                   LIR_Opr::single_size           |
 705                                   LIR_Opr::virtual_mask);
 706         break;
 707 
 708       case T_ADDRESS:
 709         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 710                                   LIR_Opr::address_type          |
 711                                   LIR_Opr::cpu_register          |
 712                                   LIR_Opr::single_size           |
 713                                   LIR_Opr::virtual_mask);
 714         break;
 715 
 716       case T_LONG:
 717         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 718                                   LIR_Opr::long_type             |
 719                                   LIR_Opr::cpu_register          |
 720                                   LIR_Opr::double_size           |
 721                                   LIR_Opr::virtual_mask);
 722         break;
 723 
 724 #ifdef __SOFTFP__
 725       case T_FLOAT:
 726         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 727                                   LIR_Opr::float_type  |
 728                                   LIR_Opr::cpu_register |
 729                                   LIR_Opr::single_size |
 730                                   LIR_Opr::virtual_mask);
 731         break;
 732       case T_DOUBLE:
 733         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 734                                   LIR_Opr::double_type |
 735                                   LIR_Opr::cpu_register |
 736                                   LIR_Opr::double_size |
 737                                   LIR_Opr::virtual_mask);
 738         break;
 739 #else // __SOFTFP__
 740       case T_FLOAT:
 741         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 742                                   LIR_Opr::float_type           |
 743                                   LIR_Opr::fpu_register         |
 744                                   LIR_Opr::single_size          |
 745                                   LIR_Opr::virtual_mask);
 746         break;
 747 
 748       case
 749         T_DOUBLE: res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 750                                             LIR_Opr::double_type           |
 751                                             LIR_Opr::fpu_register          |
 752                                             LIR_Opr::double_size           |
 753                                             LIR_Opr::virtual_mask);
 754         break;
 755 #endif // __SOFTFP__
 756       default:       ShouldNotReachHere(); res = illegalOpr;
 757     }
 758 
 759 #ifdef ASSERT
 760     res->validate_type();
 761     assert(res->vreg_number() == index, "conversion check");
 762     assert(index >= LIR_Opr::vreg_base, "must start at vreg_base");
 763 
 764     // old-style calculation; check if old and new method are equal
 765     LIR_Opr::OprType t = as_OprType(type);
 766 #ifdef __SOFTFP__
 767     LIR_Opr old_res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 768                                t |
 769                                LIR_Opr::cpu_register |
 770                                LIR_Opr::size_for(type) | LIR_Opr::virtual_mask);
 771 #else // __SOFTFP__
 772     LIR_Opr old_res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) | t |
 773                                           ((type == T_FLOAT || type == T_DOUBLE) ?  LIR_Opr::fpu_register : LIR_Opr::cpu_register) |
 774                                LIR_Opr::size_for(type) | LIR_Opr::virtual_mask);
 775     assert(res == old_res, "old and new method not equal");
 776 #endif // __SOFTFP__
 777 #endif // ASSERT
 778 
 779     return res;
 780   }
 781 
 782   // 'index' is computed by FrameMap::local_stack_pos(index); do not use other parameters as
 783   // the index is platform independent; a double stack using indices 2 and 3 has always
 784   // index 2.
 785   static LIR_Opr stack(int index, BasicType type) {
 786     LIR_Opr res;
 787     switch (type) {
 788       case T_PRIMITIVE_OBJECT: // fall through
 789       case T_OBJECT: // fall through
 790       case T_ARRAY:
 791         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 792                                   LIR_Opr::object_type           |
 793                                   LIR_Opr::stack_value           |
 794                                   LIR_Opr::single_size);
 795         break;
 796 
 797       case T_METADATA:
 798         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 799                                   LIR_Opr::metadata_type         |
 800                                   LIR_Opr::stack_value           |
 801                                   LIR_Opr::single_size);
 802         break;
 803       case T_INT:
 804         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 805                                   LIR_Opr::int_type              |
 806                                   LIR_Opr::stack_value           |
 807                                   LIR_Opr::single_size);
 808         break;
 809 
 810       case T_ADDRESS:
 811         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 812                                   LIR_Opr::address_type          |
 813                                   LIR_Opr::stack_value           |
 814                                   LIR_Opr::single_size);
 815         break;
 816 
 817       case T_LONG:
 818         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 819                                   LIR_Opr::long_type             |
 820                                   LIR_Opr::stack_value           |
 821                                   LIR_Opr::double_size);
 822         break;
 823 
 824       case T_FLOAT:
 825         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 826                                   LIR_Opr::float_type            |
 827                                   LIR_Opr::stack_value           |
 828                                   LIR_Opr::single_size);
 829         break;
 830       case T_DOUBLE:
 831         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 832                                   LIR_Opr::double_type           |
 833                                   LIR_Opr::stack_value           |
 834                                   LIR_Opr::double_size);
 835         break;
 836 
 837       default:       ShouldNotReachHere(); res = illegalOpr;
 838     }
 839 
 840 #ifdef ASSERT
 841     assert(index >= 0, "index must be positive");
 842     assert(index == (int)res->data(), "conversion check");
 843 
 844     LIR_Opr old_res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 845                                           LIR_Opr::stack_value           |
 846                                           as_OprType(type)                   |
 847                                           LIR_Opr::size_for(type));
 848     assert(res == old_res, "old and new method not equal");
 849 #endif
 850 
 851     return res;
 852   }
 853 
 854   static LIR_Opr intConst(jint i)                { return (LIR_Opr)(new LIR_Const(i)); }
 855   static LIR_Opr longConst(jlong l)              { return (LIR_Opr)(new LIR_Const(l)); }
 856   static LIR_Opr floatConst(jfloat f)            { return (LIR_Opr)(new LIR_Const(f)); }
 857   static LIR_Opr doubleConst(jdouble d)          { return (LIR_Opr)(new LIR_Const(d)); }
 858   static LIR_Opr oopConst(jobject o)             { return (LIR_Opr)(new LIR_Const(o)); }
 859   static LIR_Opr address(LIR_Address* a)         { return (LIR_Opr)a; }
 860   static LIR_Opr intptrConst(void* p)            { return (LIR_Opr)(new LIR_Const(p)); }
 861   static LIR_Opr intptrConst(intptr_t v)         { return (LIR_Opr)(new LIR_Const((void*)v)); }
 862   static LIR_Opr illegal()                       { return (LIR_Opr)-1; }
 863   static LIR_Opr addressConst(jint i)            { return (LIR_Opr)(new LIR_Const(i, true)); }
 864   static LIR_Opr metadataConst(Metadata* m)      { return (LIR_Opr)(new LIR_Const(m)); }
 865 
 866   static LIR_Opr value_type(ValueType* type);
 867 };
 868 
 869 
 870 //-------------------------------------------------------------------------------
 871 //                   LIR Instructions
 872 //-------------------------------------------------------------------------------
 873 //
 874 // Note:
 875 //  - every instruction has a result operand
 876 //  - every instruction has an CodeEmitInfo operand (can be revisited later)
 877 //  - every instruction has a LIR_OpCode operand
 878 //  - LIR_OpN, means an instruction that has N input operands
 879 //
 880 // class hierarchy:
 881 //
 882 class  LIR_Op;
 883 class    LIR_Op0;
 884 class      LIR_OpLabel;
 885 class    LIR_Op1;
 886 class      LIR_OpBranch;
 887 class      LIR_OpConvert;
 888 class      LIR_OpAllocObj;
 889 class      LIR_OpReturn;
 890 class      LIR_OpRoundFP;
 891 class    LIR_Op2;
 892 class    LIR_OpDelay;
 893 class    LIR_Op3;
 894 class      LIR_OpAllocArray;
 895 class    LIR_Op4;
 896 class    LIR_OpCall;
 897 class      LIR_OpJavaCall;
 898 class      LIR_OpRTCall;
 899 class    LIR_OpArrayCopy;
 900 class    LIR_OpUpdateCRC32;
 901 class    LIR_OpLock;
 902 class    LIR_OpTypeCheck;
 903 class    LIR_OpFlattenedArrayCheck;
 904 class    LIR_OpNullFreeArrayCheck;
 905 class    LIR_OpSubstitutabilityCheck;
 906 class    LIR_OpCompareAndSwap;
 907 class    LIR_OpLoadKlass;
 908 class    LIR_OpProfileCall;
 909 class    LIR_OpProfileType;
 910 class    LIR_OpProfileInlineType;
 911 #ifdef ASSERT
 912 class    LIR_OpAssert;
 913 #endif
 914 
 915 // LIR operation codes
 916 enum LIR_Code {
 917     lir_none
 918   , begin_op0
 919       , lir_label
 920       , lir_nop
 921       , lir_std_entry
 922       , lir_osr_entry
 923       , lir_fpop_raw
 924       , lir_breakpoint
 925       , lir_rtcall
 926       , lir_membar
 927       , lir_membar_acquire
 928       , lir_membar_release
 929       , lir_membar_loadload
 930       , lir_membar_storestore
 931       , lir_membar_loadstore
 932       , lir_membar_storeload
 933       , lir_get_thread
 934       , lir_on_spin_wait
 935       , lir_check_orig_pc
 936   , end_op0
 937   , begin_op1
 938       , lir_fxch
 939       , lir_fld
 940       , lir_push
 941       , lir_pop
 942       , lir_null_check
 943       , lir_return
 944       , lir_leal
 945       , lir_move
 946       , lir_convert
 947       , lir_alloc_object
 948       , lir_monaddr
 949       , lir_roundfp
 950       , lir_safepoint
 951       , lir_unwind
 952       , lir_load_klass
 953   , end_op1
 954   , begin_op2
 955       , lir_branch
 956       , lir_cond_float_branch
 957       , lir_cmp
 958       , lir_cmp_l2i
 959       , lir_ucmp_fd2i
 960       , lir_cmp_fd2i
 961       , lir_add
 962       , lir_sub
 963       , lir_mul
 964       , lir_div
 965       , lir_rem
 966       , lir_sqrt
 967       , lir_abs
 968       , lir_neg
 969       , lir_tan
 970       , lir_log10
 971       , lir_logic_and
 972       , lir_logic_or
 973       , lir_logic_xor
 974       , lir_shl
 975       , lir_shr
 976       , lir_ushr
 977       , lir_alloc_array
 978       , lir_throw
 979       , lir_xadd
 980       , lir_xchg
 981   , end_op2
 982   , begin_op3
 983       , lir_idiv
 984       , lir_irem
 985       , lir_fmad
 986       , lir_fmaf
 987   , end_op3
 988   , begin_op4
 989       , lir_cmove
 990   , end_op4
 991   , begin_opJavaCall
 992       , lir_static_call
 993       , lir_optvirtual_call
 994       , lir_icvirtual_call
 995       , lir_dynamic_call
 996   , end_opJavaCall
 997   , begin_opArrayCopy
 998       , lir_arraycopy
 999   , end_opArrayCopy
1000   , begin_opUpdateCRC32
1001       , lir_updatecrc32
1002   , end_opUpdateCRC32
1003   , begin_opLock
1004     , lir_lock
1005     , lir_unlock
1006   , end_opLock
1007   , begin_delay_slot
1008     , lir_delay_slot
1009   , end_delay_slot
1010   , begin_opTypeCheck
1011     , lir_instanceof
1012     , lir_checkcast
1013     , lir_store_check
1014   , end_opTypeCheck
1015   , begin_opFlattenedArrayCheck
1016     , lir_flattened_array_check
1017   , end_opFlattenedArrayCheck
1018   , begin_opNullFreeArrayCheck
1019     , lir_null_free_array_check
1020   , end_opNullFreeArrayCheck
1021   , begin_opSubstitutabilityCheck
1022     , lir_substitutability_check
1023   , end_opSubstitutabilityCheck
1024   , begin_opCompareAndSwap
1025     , lir_cas_long
1026     , lir_cas_obj
1027     , lir_cas_int
1028   , end_opCompareAndSwap
1029   , begin_opMDOProfile
1030     , lir_profile_call
1031     , lir_profile_type
1032     , lir_profile_inline_type
1033   , end_opMDOProfile
1034   , begin_opAssert
1035     , lir_assert
1036   , end_opAssert
1037 #ifdef INCLUDE_ZGC
1038   , begin_opZLoadBarrierTest
1039     , lir_zloadbarrier_test
1040   , end_opZLoadBarrierTest
1041 #endif
1042 };
1043 
1044 
1045 enum LIR_Condition {
1046     lir_cond_equal
1047   , lir_cond_notEqual
1048   , lir_cond_less
1049   , lir_cond_lessEqual
1050   , lir_cond_greaterEqual
1051   , lir_cond_greater
1052   , lir_cond_belowEqual
1053   , lir_cond_aboveEqual
1054   , lir_cond_always
1055   , lir_cond_unknown = -1
1056 };
1057 
1058 
1059 enum LIR_PatchCode {
1060   lir_patch_none,
1061   lir_patch_low,
1062   lir_patch_high,
1063   lir_patch_normal
1064 };
1065 
1066 
1067 enum LIR_MoveKind {
1068   lir_move_normal,
1069   lir_move_volatile,
1070   lir_move_wide,
1071   lir_move_max_flag
1072 };
1073 
1074 
1075 // --------------------------------------------------
1076 // LIR_Op
1077 // --------------------------------------------------
1078 class LIR_Op: public CompilationResourceObj {
1079  friend class LIR_OpVisitState;
1080 
1081 #ifdef ASSERT
1082  private:
1083   const char *  _file;
1084   int           _line;
1085 #endif
1086 
1087  protected:
1088   LIR_Opr       _result;
1089   unsigned short _code;
1090   unsigned short _flags;
1091   CodeEmitInfo* _info;
1092   int           _id;     // value id for register allocation
1093   int           _fpu_pop_count;
1094   Instruction*  _source; // for debugging
1095 
1096   static void print_condition(outputStream* out, LIR_Condition cond) PRODUCT_RETURN;
1097 
1098  protected:
1099   static bool is_in_range(LIR_Code test, LIR_Code start, LIR_Code end)  { return start < test && test < end; }
1100 
1101  public:
1102   LIR_Op()
1103     :
1104 #ifdef ASSERT
1105       _file(NULL)
1106     , _line(0),
1107 #endif
1108       _result(LIR_OprFact::illegalOpr)
1109     , _code(lir_none)
1110     , _flags(0)
1111     , _info(NULL)
1112     , _id(-1)
1113     , _fpu_pop_count(0)
1114     , _source(NULL) {}
1115 
1116   LIR_Op(LIR_Code code, LIR_Opr result, CodeEmitInfo* info)
1117     :
1118 #ifdef ASSERT
1119       _file(NULL)
1120     , _line(0),
1121 #endif
1122       _result(result)
1123     , _code(code)
1124     , _flags(0)
1125     , _info(info)
1126     , _id(-1)
1127     , _fpu_pop_count(0)
1128     , _source(NULL) {}
1129 
1130   CodeEmitInfo* info() const                  { return _info;   }
1131   LIR_Code code()      const                  { return (LIR_Code)_code;   }
1132   LIR_Opr result_opr() const                  { return _result; }
1133   void    set_result_opr(LIR_Opr opr)         { _result = opr;  }
1134 
1135 #ifdef ASSERT
1136   void set_file_and_line(const char * file, int line) {
1137     _file = file;
1138     _line = line;
1139   }
1140 #endif
1141 
1142   virtual const char * name() const PRODUCT_RETURN0;
1143   virtual void visit(LIR_OpVisitState* state);
1144 
1145   int id()             const                  { return _id;     }
1146   void set_id(int id)                         { _id = id; }
1147 
1148   // FPU stack simulation helpers -- only used on Intel
1149   void set_fpu_pop_count(int count)           { assert(count >= 0 && count <= 1, "currently only 0 and 1 are valid"); _fpu_pop_count = count; }
1150   int  fpu_pop_count() const                  { return _fpu_pop_count; }
1151   bool pop_fpu_stack()                        { return _fpu_pop_count > 0; }
1152 
1153   Instruction* source() const                 { return _source; }
1154   void set_source(Instruction* ins)           { _source = ins; }
1155 
1156   virtual void emit_code(LIR_Assembler* masm) = 0;
1157   virtual void print_instr(outputStream* out) const   = 0;
1158   virtual void print_on(outputStream* st) const PRODUCT_RETURN;
1159 
1160   virtual bool is_patching() { return false; }
1161   virtual LIR_OpCall* as_OpCall() { return NULL; }
1162   virtual LIR_OpJavaCall* as_OpJavaCall() { return NULL; }
1163   virtual LIR_OpLabel* as_OpLabel() { return NULL; }
1164   virtual LIR_OpDelay* as_OpDelay() { return NULL; }
1165   virtual LIR_OpLock* as_OpLock() { return NULL; }
1166   virtual LIR_OpAllocArray* as_OpAllocArray() { return NULL; }
1167   virtual LIR_OpAllocObj* as_OpAllocObj() { return NULL; }
1168   virtual LIR_OpRoundFP* as_OpRoundFP() { return NULL; }
1169   virtual LIR_OpBranch* as_OpBranch() { return NULL; }
1170   virtual LIR_OpReturn* as_OpReturn() { return NULL; }
1171   virtual LIR_OpRTCall* as_OpRTCall() { return NULL; }
1172   virtual LIR_OpConvert* as_OpConvert() { return NULL; }
1173   virtual LIR_Op0* as_Op0() { return NULL; }
1174   virtual LIR_Op1* as_Op1() { return NULL; }
1175   virtual LIR_Op2* as_Op2() { return NULL; }
1176   virtual LIR_Op3* as_Op3() { return NULL; }
1177   virtual LIR_Op4* as_Op4() { return NULL; }
1178   virtual LIR_OpArrayCopy* as_OpArrayCopy() { return NULL; }
1179   virtual LIR_OpUpdateCRC32* as_OpUpdateCRC32() { return NULL; }
1180   virtual LIR_OpTypeCheck* as_OpTypeCheck() { return NULL; }
1181   virtual LIR_OpFlattenedArrayCheck* as_OpFlattenedArrayCheck() { return NULL; }
1182   virtual LIR_OpNullFreeArrayCheck* as_OpNullFreeArrayCheck() { return NULL; }
1183   virtual LIR_OpSubstitutabilityCheck* as_OpSubstitutabilityCheck() { return NULL; }
1184   virtual LIR_OpCompareAndSwap* as_OpCompareAndSwap() { return NULL; }
1185   virtual LIR_OpLoadKlass* as_OpLoadKlass() { return NULL; }
1186   virtual LIR_OpProfileCall* as_OpProfileCall() { return NULL; }
1187   virtual LIR_OpProfileType* as_OpProfileType() { return NULL; }
1188   virtual LIR_OpProfileInlineType* as_OpProfileInlineType() { return NULL; }
1189 #ifdef ASSERT
1190   virtual LIR_OpAssert* as_OpAssert() { return NULL; }
1191 #endif
1192 
1193   virtual void verify() const {}
1194 };
1195 
1196 // for calls
1197 class LIR_OpCall: public LIR_Op {
1198  friend class LIR_OpVisitState;
1199 
1200  protected:
1201   address      _addr;
1202   LIR_OprList* _arguments;
1203  protected:
1204   LIR_OpCall(LIR_Code code, address addr, LIR_Opr result,
1205              LIR_OprList* arguments, CodeEmitInfo* info = NULL)
1206     : LIR_Op(code, result, info)
1207     , _addr(addr)
1208     , _arguments(arguments) {}
1209 
1210  public:
1211   address addr() const                           { return _addr; }
1212   const LIR_OprList* arguments() const           { return _arguments; }
1213   virtual LIR_OpCall* as_OpCall()                { return this; }
1214 };
1215 
1216 
1217 // --------------------------------------------------
1218 // LIR_OpJavaCall
1219 // --------------------------------------------------
1220 class LIR_OpJavaCall: public LIR_OpCall {
1221  friend class LIR_OpVisitState;
1222 
1223  private:
1224   ciMethod* _method;
1225   LIR_Opr   _receiver;
1226   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.
1227 
1228  public:
1229   LIR_OpJavaCall(LIR_Code code, ciMethod* method,
1230                  LIR_Opr receiver, LIR_Opr result,
1231                  address addr, LIR_OprList* arguments,
1232                  CodeEmitInfo* info)
1233   : LIR_OpCall(code, addr, result, arguments, info)
1234   , _method(method)
1235   , _receiver(receiver)
1236   , _method_handle_invoke_SP_save_opr(LIR_OprFact::illegalOpr)
1237   { assert(is_in_range(code, begin_opJavaCall, end_opJavaCall), "code check"); }
1238 
1239   LIR_OpJavaCall(LIR_Code code, ciMethod* method,
1240                  LIR_Opr receiver, LIR_Opr result, intptr_t vtable_offset,
1241                  LIR_OprList* arguments, CodeEmitInfo* info)
1242   : LIR_OpCall(code, (address)vtable_offset, result, arguments, info)
1243   , _method(method)
1244   , _receiver(receiver)
1245   , _method_handle_invoke_SP_save_opr(LIR_OprFact::illegalOpr)
1246   { assert(is_in_range(code, begin_opJavaCall, end_opJavaCall), "code check"); }
1247 
1248   LIR_Opr receiver() const                       { return _receiver; }
1249   ciMethod* method() const                       { return _method;   }
1250 
1251   // JSR 292 support.
1252   bool is_invokedynamic() const                  { return code() == lir_dynamic_call; }
1253   bool is_method_handle_invoke() const {
1254     return method()->is_compiled_lambda_form() ||   // Java-generated lambda form
1255            method()->is_method_handle_intrinsic();  // JVM-generated MH intrinsic
1256   }
1257 
1258   virtual void emit_code(LIR_Assembler* masm);
1259   virtual LIR_OpJavaCall* as_OpJavaCall() { return this; }
1260   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1261 
1262   bool maybe_return_as_fields(ciInlineKlass** vk = NULL) const;
1263 };
1264 
1265 // --------------------------------------------------
1266 // LIR_OpLabel
1267 // --------------------------------------------------
1268 // Location where a branch can continue
1269 class LIR_OpLabel: public LIR_Op {
1270  friend class LIR_OpVisitState;
1271 
1272  private:
1273   Label* _label;
1274  public:
1275   LIR_OpLabel(Label* lbl)
1276    : LIR_Op(lir_label, LIR_OprFact::illegalOpr, NULL)
1277    , _label(lbl)                                 {}
1278   Label* label() const                           { return _label; }
1279 
1280   virtual void emit_code(LIR_Assembler* masm);
1281   virtual LIR_OpLabel* as_OpLabel() { return this; }
1282   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1283 };
1284 
1285 // LIR_OpArrayCopy
1286 class LIR_OpArrayCopy: public LIR_Op {
1287  friend class LIR_OpVisitState;
1288 
1289  private:
1290   ArrayCopyStub*  _stub;
1291   LIR_Opr   _src;
1292   LIR_Opr   _src_pos;
1293   LIR_Opr   _dst;
1294   LIR_Opr   _dst_pos;
1295   LIR_Opr   _length;
1296   LIR_Opr   _tmp;
1297   ciArrayKlass* _expected_type;
1298   int       _flags;
1299 
1300 public:
1301   enum Flags {
1302     src_null_check         = 1 << 0,
1303     dst_null_check         = 1 << 1,
1304     src_pos_positive_check = 1 << 2,
1305     dst_pos_positive_check = 1 << 3,
1306     length_positive_check  = 1 << 4,
1307     src_range_check        = 1 << 5,
1308     dst_range_check        = 1 << 6,
1309     type_check             = 1 << 7,
1310     overlapping            = 1 << 8,
1311     unaligned              = 1 << 9,
1312     src_objarray           = 1 << 10,
1313     dst_objarray           = 1 << 11,
1314     always_slow_path       = 1 << 12,
1315     src_inlinetype_check   = 1 << 13,
1316     dst_inlinetype_check   = 1 << 14,
1317     all_flags              = (1 << 15) - 1
1318   };
1319 
1320   LIR_OpArrayCopy(LIR_Opr src, LIR_Opr src_pos, LIR_Opr dst, LIR_Opr dst_pos, LIR_Opr length, LIR_Opr tmp,
1321                   ciArrayKlass* expected_type, int flags, CodeEmitInfo* info);
1322 
1323   LIR_Opr src() const                            { return _src; }
1324   LIR_Opr src_pos() const                        { return _src_pos; }
1325   LIR_Opr dst() const                            { return _dst; }
1326   LIR_Opr dst_pos() const                        { return _dst_pos; }
1327   LIR_Opr length() const                         { return _length; }
1328   LIR_Opr tmp() const                            { return _tmp; }
1329   int flags() const                              { return _flags; }
1330   ciArrayKlass* expected_type() const            { return _expected_type; }
1331   ArrayCopyStub* stub() const                    { return _stub; }
1332 
1333   virtual void emit_code(LIR_Assembler* masm);
1334   virtual LIR_OpArrayCopy* as_OpArrayCopy() { return this; }
1335   void print_instr(outputStream* out) const PRODUCT_RETURN;
1336 };
1337 
1338 // LIR_OpUpdateCRC32
1339 class LIR_OpUpdateCRC32: public LIR_Op {
1340   friend class LIR_OpVisitState;
1341 
1342 private:
1343   LIR_Opr   _crc;
1344   LIR_Opr   _val;
1345 
1346 public:
1347 
1348   LIR_OpUpdateCRC32(LIR_Opr crc, LIR_Opr val, LIR_Opr res);
1349 
1350   LIR_Opr crc() const                            { return _crc; }
1351   LIR_Opr val() const                            { return _val; }
1352 
1353   virtual void emit_code(LIR_Assembler* masm);
1354   virtual LIR_OpUpdateCRC32* as_OpUpdateCRC32()  { return this; }
1355   void print_instr(outputStream* out) const PRODUCT_RETURN;
1356 };
1357 
1358 // --------------------------------------------------
1359 // LIR_Op0
1360 // --------------------------------------------------
1361 class LIR_Op0: public LIR_Op {
1362  friend class LIR_OpVisitState;
1363 
1364  public:
1365   LIR_Op0(LIR_Code code)
1366    : LIR_Op(code, LIR_OprFact::illegalOpr, NULL)  { assert(is_in_range(code, begin_op0, end_op0), "code check"); }
1367   LIR_Op0(LIR_Code code, LIR_Opr result, CodeEmitInfo* info = NULL)
1368    : LIR_Op(code, result, info)  { assert(is_in_range(code, begin_op0, end_op0), "code check"); }
1369 
1370   virtual void emit_code(LIR_Assembler* masm);
1371   virtual LIR_Op0* as_Op0() { return this; }
1372   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1373 };
1374 
1375 
1376 // --------------------------------------------------
1377 // LIR_Op1
1378 // --------------------------------------------------
1379 
1380 class LIR_Op1: public LIR_Op {
1381  friend class LIR_OpVisitState;
1382 
1383  protected:
1384   LIR_Opr         _opr;   // input operand
1385   BasicType       _type;  // Operand types
1386   LIR_PatchCode   _patch; // only required with patchin (NEEDS_CLEANUP: do we want a special instruction for patching?)
1387 
1388   static void print_patch_code(outputStream* out, LIR_PatchCode code);
1389 
1390   void set_kind(LIR_MoveKind kind) {
1391     assert(code() == lir_move, "must be");
1392     _flags = kind;
1393   }
1394 
1395  public:
1396   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)
1397     : LIR_Op(code, result, info)
1398     , _opr(opr)
1399     , _type(type)
1400     , _patch(patch)                    { assert(is_in_range(code, begin_op1, end_op1), "code check"); }
1401 
1402   LIR_Op1(LIR_Code code, LIR_Opr opr, LIR_Opr result, BasicType type, LIR_PatchCode patch, CodeEmitInfo* info, LIR_MoveKind kind)
1403     : LIR_Op(code, result, info)
1404     , _opr(opr)
1405     , _type(type)
1406     , _patch(patch)                    {
1407     assert(code == lir_move, "must be");
1408     set_kind(kind);
1409   }
1410 
1411   LIR_Op1(LIR_Code code, LIR_Opr opr, CodeEmitInfo* info)
1412     : LIR_Op(code, LIR_OprFact::illegalOpr, info)
1413     , _opr(opr)
1414     , _type(T_ILLEGAL)
1415     , _patch(lir_patch_none)           { assert(is_in_range(code, begin_op1, end_op1), "code check"); }
1416 
1417   LIR_Opr in_opr()           const               { return _opr;   }
1418   LIR_PatchCode patch_code() const               { return _patch; }
1419   BasicType type()           const               { return _type;  }
1420 
1421   LIR_MoveKind move_kind() const {
1422     assert(code() == lir_move, "must be");
1423     return (LIR_MoveKind)_flags;
1424   }
1425 
1426   virtual bool is_patching() { return _patch != lir_patch_none; }
1427   virtual void emit_code(LIR_Assembler* masm);
1428   virtual LIR_Op1* as_Op1() { return this; }
1429   virtual const char * name() const PRODUCT_RETURN0;
1430 
1431   void set_in_opr(LIR_Opr opr) { _opr = opr; }
1432 
1433   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1434   virtual void verify() const;
1435 };
1436 
1437 
1438 // for runtime calls
1439 class LIR_OpRTCall: public LIR_OpCall {
1440  friend class LIR_OpVisitState;
1441 
1442  private:
1443   LIR_Opr _tmp;
1444  public:
1445   LIR_OpRTCall(address addr, LIR_Opr tmp,
1446                LIR_Opr result, LIR_OprList* arguments, CodeEmitInfo* info = NULL)
1447     : LIR_OpCall(lir_rtcall, addr, result, arguments, info)
1448     , _tmp(tmp) {}
1449 
1450   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1451   virtual void emit_code(LIR_Assembler* masm);
1452   virtual LIR_OpRTCall* as_OpRTCall() { return this; }
1453 
1454   LIR_Opr tmp() const                            { return _tmp; }
1455 
1456   virtual void verify() const;
1457 };
1458 
1459 
1460 
1461 class LIR_OpReturn: public LIR_Op1 {
1462  friend class LIR_OpVisitState;
1463 
1464  private:
1465   C1SafepointPollStub* _stub;
1466 
1467  public:
1468   LIR_OpReturn(LIR_Opr opr);
1469 
1470   C1SafepointPollStub* stub() const { return _stub; }
1471   virtual LIR_OpReturn* as_OpReturn() { return this; }
1472 };
1473 
1474 class ConversionStub;
1475 
1476 class LIR_OpConvert: public LIR_Op1 {
1477  friend class LIR_OpVisitState;
1478 
1479  private:
1480    Bytecodes::Code _bytecode;
1481    ConversionStub* _stub;
1482 
1483  public:
1484    LIR_OpConvert(Bytecodes::Code code, LIR_Opr opr, LIR_Opr result, ConversionStub* stub)
1485      : LIR_Op1(lir_convert, opr, result)
1486      , _bytecode(code)
1487      , _stub(stub)                               {}
1488 
1489   Bytecodes::Code bytecode() const               { return _bytecode; }
1490   ConversionStub* stub() const                   { return _stub; }
1491 
1492   virtual void emit_code(LIR_Assembler* masm);
1493   virtual LIR_OpConvert* as_OpConvert() { return this; }
1494   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1495 
1496   static void print_bytecode(outputStream* out, Bytecodes::Code code) PRODUCT_RETURN;
1497 };
1498 
1499 
1500 // LIR_OpAllocObj
1501 class LIR_OpAllocObj : public LIR_Op1 {
1502  friend class LIR_OpVisitState;
1503 
1504  private:
1505   LIR_Opr _tmp1;
1506   LIR_Opr _tmp2;
1507   LIR_Opr _tmp3;
1508   LIR_Opr _tmp4;
1509   int     _hdr_size;
1510   int     _obj_size;
1511   CodeStub* _stub;
1512   bool    _init_check;
1513 
1514  public:
1515   LIR_OpAllocObj(LIR_Opr klass, LIR_Opr result,
1516                  LIR_Opr t1, LIR_Opr t2, LIR_Opr t3, LIR_Opr t4,
1517                  int hdr_size, int obj_size, bool init_check, CodeStub* stub)
1518     : LIR_Op1(lir_alloc_object, klass, result)
1519     , _tmp1(t1)
1520     , _tmp2(t2)
1521     , _tmp3(t3)
1522     , _tmp4(t4)
1523     , _hdr_size(hdr_size)
1524     , _obj_size(obj_size)
1525     , _stub(stub)
1526     , _init_check(init_check)                    { }
1527 
1528   LIR_Opr klass()        const                   { return in_opr();     }
1529   LIR_Opr obj()          const                   { return result_opr(); }
1530   LIR_Opr tmp1()         const                   { return _tmp1;        }
1531   LIR_Opr tmp2()         const                   { return _tmp2;        }
1532   LIR_Opr tmp3()         const                   { return _tmp3;        }
1533   LIR_Opr tmp4()         const                   { return _tmp4;        }
1534   int     header_size()  const                   { return _hdr_size;    }
1535   int     object_size()  const                   { return _obj_size;    }
1536   bool    init_check()   const                   { return _init_check;  }
1537   CodeStub* stub()       const                   { return _stub;        }
1538 
1539   virtual void emit_code(LIR_Assembler* masm);
1540   virtual LIR_OpAllocObj * as_OpAllocObj () { return this; }
1541   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1542 };
1543 
1544 
1545 // LIR_OpRoundFP
1546 class LIR_OpRoundFP : public LIR_Op1 {
1547  friend class LIR_OpVisitState;
1548 
1549  private:
1550   LIR_Opr _tmp;
1551 
1552  public:
1553   LIR_OpRoundFP(LIR_Opr reg, LIR_Opr stack_loc_temp, LIR_Opr result)
1554     : LIR_Op1(lir_roundfp, reg, result)
1555     , _tmp(stack_loc_temp) {}
1556 
1557   LIR_Opr tmp() const                            { return _tmp; }
1558   virtual LIR_OpRoundFP* as_OpRoundFP()          { return this; }
1559   void print_instr(outputStream* out) const PRODUCT_RETURN;
1560 };
1561 
1562 // LIR_OpTypeCheck
1563 class LIR_OpTypeCheck: public LIR_Op {
1564  friend class LIR_OpVisitState;
1565 
1566  private:
1567   LIR_Opr       _object;
1568   LIR_Opr       _array;
1569   ciKlass*      _klass;
1570   LIR_Opr       _tmp1;
1571   LIR_Opr       _tmp2;
1572   LIR_Opr       _tmp3;
1573   bool          _fast_check;
1574   CodeEmitInfo* _info_for_patch;
1575   CodeEmitInfo* _info_for_exception;
1576   CodeStub*     _stub;
1577   ciMethod*     _profiled_method;
1578   int           _profiled_bci;
1579   bool          _should_profile;
1580   bool          _need_null_check;
1581 
1582 public:
1583   LIR_OpTypeCheck(LIR_Code code, LIR_Opr result, LIR_Opr object, ciKlass* klass,
1584                   LIR_Opr tmp1, LIR_Opr tmp2, LIR_Opr tmp3, bool fast_check,
1585                   CodeEmitInfo* info_for_exception, CodeEmitInfo* info_for_patch, CodeStub* stub, bool need_null_check = true);
1586   LIR_OpTypeCheck(LIR_Code code, LIR_Opr object, LIR_Opr array,
1587                   LIR_Opr tmp1, LIR_Opr tmp2, LIR_Opr tmp3, CodeEmitInfo* info_for_exception);
1588 
1589   LIR_Opr object() const                         { return _object;         }
1590   LIR_Opr array() const                          { assert(code() == lir_store_check, "not valid"); return _array;         }
1591   LIR_Opr tmp1() const                           { return _tmp1;           }
1592   LIR_Opr tmp2() const                           { return _tmp2;           }
1593   LIR_Opr tmp3() const                           { return _tmp3;           }
1594   ciKlass* klass() const                         { assert(code() == lir_instanceof || code() == lir_checkcast, "not valid"); return _klass;          }
1595   bool fast_check() const                        { assert(code() == lir_instanceof || code() == lir_checkcast, "not valid"); return _fast_check;     }
1596   CodeEmitInfo* info_for_patch() const           { return _info_for_patch;  }
1597   CodeEmitInfo* info_for_exception() const       { return _info_for_exception; }
1598   CodeStub* stub() const                         { return _stub;           }
1599 
1600   // MethodData* profiling
1601   void set_profiled_method(ciMethod *method)     { _profiled_method = method; }
1602   void set_profiled_bci(int bci)                 { _profiled_bci = bci;       }
1603   void set_should_profile(bool b)                { _should_profile = b;       }
1604   ciMethod* profiled_method() const              { return _profiled_method;   }
1605   int       profiled_bci() const                 { return _profiled_bci;      }
1606   bool      should_profile() const               { return _should_profile;    }
1607   bool      need_null_check() const              { return _need_null_check;   }
1608   virtual bool is_patching() { return _info_for_patch != NULL; }
1609   virtual void emit_code(LIR_Assembler* masm);
1610   virtual LIR_OpTypeCheck* as_OpTypeCheck() { return this; }
1611   void print_instr(outputStream* out) const PRODUCT_RETURN;
1612 };
1613 
1614 // LIR_OpFlattenedArrayCheck
1615 class LIR_OpFlattenedArrayCheck: public LIR_Op {
1616  friend class LIR_OpVisitState;
1617 
1618  private:
1619   LIR_Opr       _array;
1620   LIR_Opr       _value;
1621   LIR_Opr       _tmp;
1622   CodeStub*     _stub;
1623 public:
1624   LIR_OpFlattenedArrayCheck(LIR_Opr array, LIR_Opr value, LIR_Opr tmp, CodeStub* stub);
1625   LIR_Opr array() const                          { return _array;         }
1626   LIR_Opr value() const                          { return _value;         }
1627   LIR_Opr tmp() const                            { return _tmp;           }
1628   CodeStub* stub() const                         { return _stub;          }
1629 
1630   virtual void emit_code(LIR_Assembler* masm);
1631   virtual LIR_OpFlattenedArrayCheck* as_OpFlattenedArrayCheck() { return this; }
1632   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1633 };
1634 
1635 // LIR_OpNullFreeArrayCheck
1636 class LIR_OpNullFreeArrayCheck: public LIR_Op {
1637  friend class LIR_OpVisitState;
1638 
1639  private:
1640   LIR_Opr       _array;
1641   LIR_Opr       _tmp;
1642 public:
1643   LIR_OpNullFreeArrayCheck(LIR_Opr array, LIR_Opr tmp);
1644   LIR_Opr array() const                          { return _array;         }
1645   LIR_Opr tmp() const                            { return _tmp;           }
1646 
1647   virtual void emit_code(LIR_Assembler* masm);
1648   virtual LIR_OpNullFreeArrayCheck* as_OpNullFreeArrayCheck() { return this; }
1649   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1650 };
1651 
1652 class LIR_OpSubstitutabilityCheck: public LIR_Op {
1653  friend class LIR_OpVisitState;
1654 
1655  private:
1656   LIR_Opr       _left;
1657   LIR_Opr       _right;
1658   LIR_Opr       _equal_result;
1659   LIR_Opr       _not_equal_result;
1660   LIR_Opr       _tmp1;
1661   LIR_Opr       _tmp2;
1662   ciKlass*      _left_klass;
1663   ciKlass*      _right_klass;
1664   LIR_Opr       _left_klass_op;
1665   LIR_Opr       _right_klass_op;
1666   CodeStub*     _stub;
1667 public:
1668   LIR_OpSubstitutabilityCheck(LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr equal_result, LIR_Opr not_equal_result,
1669                               LIR_Opr tmp1, LIR_Opr tmp2,
1670                               ciKlass* left_klass, ciKlass* right_klass, LIR_Opr left_klass_op, LIR_Opr right_klass_op,
1671                               CodeEmitInfo* info, CodeStub* stub);
1672 
1673   LIR_Opr left() const             { return _left; }
1674   LIR_Opr right() const            { return _right; }
1675   LIR_Opr equal_result() const     { return _equal_result; }
1676   LIR_Opr not_equal_result() const { return _not_equal_result; }
1677   LIR_Opr tmp1() const             { return _tmp1; }
1678   LIR_Opr tmp2() const             { return _tmp2; }
1679   ciKlass* left_klass() const      { return _left_klass; }
1680   ciKlass* right_klass() const     { return _right_klass; }
1681   LIR_Opr left_klass_op() const    { return _left_klass_op; }
1682   LIR_Opr right_klass_op() const   { return _right_klass_op; }
1683   CodeStub* stub() const           { return _stub; }
1684 
1685   virtual void emit_code(LIR_Assembler* masm);
1686   virtual LIR_OpSubstitutabilityCheck* as_OpSubstitutabilityCheck() { return this; }
1687   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1688 };
1689 
1690 // LIR_Op2
1691 class LIR_Op2: public LIR_Op {
1692  friend class LIR_OpVisitState;
1693 
1694   int  _fpu_stack_size; // for sin/cos implementation on Intel
1695 
1696  protected:
1697   LIR_Opr   _opr1;
1698   LIR_Opr   _opr2;
1699   BasicType _type;
1700   LIR_Opr   _tmp1;
1701   LIR_Opr   _tmp2;
1702   LIR_Opr   _tmp3;
1703   LIR_Opr   _tmp4;
1704   LIR_Opr   _tmp5;
1705   LIR_Condition _condition;
1706 
1707   void verify() const;
1708 
1709  public:
1710   LIR_Op2(LIR_Code code, LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, CodeEmitInfo* info = NULL, BasicType type = T_ILLEGAL)
1711     : LIR_Op(code, LIR_OprFact::illegalOpr, info)
1712     , _fpu_stack_size(0)
1713     , _opr1(opr1)
1714     , _opr2(opr2)
1715     , _type(type)
1716     , _tmp1(LIR_OprFact::illegalOpr)
1717     , _tmp2(LIR_OprFact::illegalOpr)
1718     , _tmp3(LIR_OprFact::illegalOpr)
1719     , _tmp4(LIR_OprFact::illegalOpr)
1720     , _tmp5(LIR_OprFact::illegalOpr)
1721     , _condition(condition) {
1722     assert(code == lir_cmp || code == lir_branch || code == lir_cond_float_branch || code == lir_assert, "code check");
1723   }
1724 
1725   LIR_Op2(LIR_Code code, LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type)
1726     : LIR_Op(code, result, NULL)
1727     , _fpu_stack_size(0)
1728     , _opr1(opr1)
1729     , _opr2(opr2)
1730     , _type(type)
1731     , _tmp1(LIR_OprFact::illegalOpr)
1732     , _tmp2(LIR_OprFact::illegalOpr)
1733     , _tmp3(LIR_OprFact::illegalOpr)
1734     , _tmp4(LIR_OprFact::illegalOpr)
1735     , _tmp5(LIR_OprFact::illegalOpr)
1736     , _condition(condition) {
1737     assert(code == lir_cmove, "code check");
1738     assert(type != T_ILLEGAL, "cmove should have type");
1739   }
1740 
1741   LIR_Op2(LIR_Code code, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result = LIR_OprFact::illegalOpr,
1742           CodeEmitInfo* info = NULL, BasicType type = T_ILLEGAL)
1743     : LIR_Op(code, result, info)
1744     , _fpu_stack_size(0)
1745     , _opr1(opr1)
1746     , _opr2(opr2)
1747     , _type(type)
1748     , _tmp1(LIR_OprFact::illegalOpr)
1749     , _tmp2(LIR_OprFact::illegalOpr)
1750     , _tmp3(LIR_OprFact::illegalOpr)
1751     , _tmp4(LIR_OprFact::illegalOpr)
1752     , _tmp5(LIR_OprFact::illegalOpr)
1753     , _condition(lir_cond_unknown) {
1754     assert(code != lir_cmp && code != lir_branch && code != lir_cond_float_branch && is_in_range(code, begin_op2, end_op2), "code check");
1755   }
1756 
1757   LIR_Op2(LIR_Code code, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, LIR_Opr tmp1, LIR_Opr tmp2 = LIR_OprFact::illegalOpr,
1758           LIR_Opr tmp3 = LIR_OprFact::illegalOpr, LIR_Opr tmp4 = LIR_OprFact::illegalOpr, LIR_Opr tmp5 = LIR_OprFact::illegalOpr)
1759     : LIR_Op(code, result, NULL)
1760     , _fpu_stack_size(0)
1761     , _opr1(opr1)
1762     , _opr2(opr2)
1763     , _type(T_ILLEGAL)
1764     , _tmp1(tmp1)
1765     , _tmp2(tmp2)
1766     , _tmp3(tmp3)
1767     , _tmp4(tmp4)
1768     , _tmp5(tmp5)
1769     , _condition(lir_cond_unknown) {
1770     assert(code != lir_cmp && code != lir_branch && code != lir_cond_float_branch && is_in_range(code, begin_op2, end_op2), "code check");
1771   }
1772 
1773   LIR_Opr in_opr1() const                        { return _opr1; }
1774   LIR_Opr in_opr2() const                        { return _opr2; }
1775   BasicType type()  const                        { return _type; }
1776   LIR_Opr tmp1_opr() const                       { return _tmp1; }
1777   LIR_Opr tmp2_opr() const                       { return _tmp2; }
1778   LIR_Opr tmp3_opr() const                       { return _tmp3; }
1779   LIR_Opr tmp4_opr() const                       { return _tmp4; }
1780   LIR_Opr tmp5_opr() const                       { return _tmp5; }
1781   LIR_Condition condition() const  {
1782     assert(code() == lir_cmp || code() == lir_branch || code() == lir_cond_float_branch || code() == lir_assert, "only valid for branch and assert"); return _condition;
1783   }
1784   void set_condition(LIR_Condition condition) {
1785     assert(code() == lir_cmp || code() == lir_branch || code() == lir_cond_float_branch, "only valid for branch"); _condition = condition;
1786   }
1787 
1788   void set_fpu_stack_size(int size)              { _fpu_stack_size = size; }
1789   int  fpu_stack_size() const                    { return _fpu_stack_size; }
1790 
1791   void set_in_opr1(LIR_Opr opr)                  { _opr1 = opr; }
1792   void set_in_opr2(LIR_Opr opr)                  { _opr2 = opr; }
1793 
1794   virtual void emit_code(LIR_Assembler* masm);
1795   virtual LIR_Op2* as_Op2() { return this; }
1796   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1797 };
1798 
1799 class LIR_OpBranch: public LIR_Op2 {
1800  friend class LIR_OpVisitState;
1801 
1802  private:
1803   Label*        _label;
1804   BlockBegin*   _block;  // if this is a branch to a block, this is the block
1805   BlockBegin*   _ublock; // if this is a float-branch, this is the unordered block
1806   CodeStub*     _stub;   // if this is a branch to a stub, this is the stub
1807 
1808  public:
1809   LIR_OpBranch(LIR_Condition cond, Label* lbl)
1810     : LIR_Op2(lir_branch, cond, LIR_OprFact::illegalOpr, LIR_OprFact::illegalOpr, (CodeEmitInfo*) NULL)
1811     , _label(lbl)
1812     , _block(NULL)
1813     , _ublock(NULL)
1814     , _stub(NULL) { }
1815 
1816   LIR_OpBranch(LIR_Condition cond, BlockBegin* block);
1817   LIR_OpBranch(LIR_Condition cond, CodeStub* stub);
1818 
1819   // for unordered comparisons
1820   LIR_OpBranch(LIR_Condition cond, BlockBegin* block, BlockBegin* ublock);
1821 
1822   LIR_Condition cond() const {
1823     return condition();
1824   }
1825 
1826   void set_cond(LIR_Condition cond) {
1827     set_condition(cond);
1828   }
1829 
1830   Label*        label()       const              { return _label;       }
1831   BlockBegin*   block()       const              { return _block;       }
1832   BlockBegin*   ublock()      const              { return _ublock;      }
1833   CodeStub*     stub()        const              { return _stub;        }
1834 
1835   void          change_block(BlockBegin* b);
1836   void          change_ublock(BlockBegin* b);
1837   void          negate_cond();
1838 
1839   virtual void emit_code(LIR_Assembler* masm);
1840   virtual LIR_OpBranch* as_OpBranch() { return this; }
1841   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1842 };
1843 
1844 class LIR_OpAllocArray : public LIR_Op {
1845  friend class LIR_OpVisitState;
1846 
1847  private:
1848   LIR_Opr   _klass;
1849   LIR_Opr   _len;
1850   LIR_Opr   _tmp1;
1851   LIR_Opr   _tmp2;
1852   LIR_Opr   _tmp3;
1853   LIR_Opr   _tmp4;
1854   BasicType _type;
1855   CodeStub* _stub;
1856 
1857  public:
1858   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)
1859     : LIR_Op(lir_alloc_array, result, NULL)
1860     , _klass(klass)
1861     , _len(len)
1862     , _tmp1(t1)
1863     , _tmp2(t2)
1864     , _tmp3(t3)
1865     , _tmp4(t4)
1866     , _type(type)
1867     , _stub(stub) {}
1868 
1869   LIR_Opr   klass()   const                      { return _klass;       }
1870   LIR_Opr   len()     const                      { return _len;         }
1871   LIR_Opr   obj()     const                      { return result_opr(); }
1872   LIR_Opr   tmp1()    const                      { return _tmp1;        }
1873   LIR_Opr   tmp2()    const                      { return _tmp2;        }
1874   LIR_Opr   tmp3()    const                      { return _tmp3;        }
1875   LIR_Opr   tmp4()    const                      { return _tmp4;        }
1876   BasicType type()    const                      { return _type;        }
1877   CodeStub* stub()    const                      { return _stub;        }
1878 
1879   virtual void emit_code(LIR_Assembler* masm);
1880   virtual LIR_OpAllocArray * as_OpAllocArray () { return this; }
1881   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1882 };
1883 
1884 
1885 class LIR_Op3: public LIR_Op {
1886  friend class LIR_OpVisitState;
1887 
1888  private:
1889   LIR_Opr _opr1;
1890   LIR_Opr _opr2;
1891   LIR_Opr _opr3;
1892  public:
1893   LIR_Op3(LIR_Code code, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr opr3, LIR_Opr result, CodeEmitInfo* info = NULL)
1894     : LIR_Op(code, result, info)
1895     , _opr1(opr1)
1896     , _opr2(opr2)
1897     , _opr3(opr3)                                { assert(is_in_range(code, begin_op3, end_op3), "code check"); }
1898   LIR_Opr in_opr1() const                        { return _opr1; }
1899   LIR_Opr in_opr2() const                        { return _opr2; }
1900   LIR_Opr in_opr3() const                        { return _opr3; }
1901 
1902   virtual void emit_code(LIR_Assembler* masm);
1903   virtual LIR_Op3* as_Op3() { return this; }
1904   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1905 };
1906 
1907 class LIR_Op4: public LIR_Op {
1908   friend class LIR_OpVisitState;
1909  protected:
1910   LIR_Opr   _opr1;
1911   LIR_Opr   _opr2;
1912   LIR_Opr   _opr3;
1913   LIR_Opr   _opr4;
1914   BasicType _type;
1915   LIR_Opr   _tmp1;
1916   LIR_Opr   _tmp2;
1917   LIR_Opr   _tmp3;
1918   LIR_Opr   _tmp4;
1919   LIR_Opr   _tmp5;
1920   LIR_Condition _condition;
1921 
1922  public:
1923   LIR_Op4(LIR_Code code, LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr opr3, LIR_Opr opr4,
1924           LIR_Opr result, BasicType type)
1925     : LIR_Op(code, result, NULL)
1926     , _opr1(opr1)
1927     , _opr2(opr2)
1928     , _opr3(opr3)
1929     , _opr4(opr4)
1930     , _type(type)
1931     , _tmp1(LIR_OprFact::illegalOpr)
1932     , _tmp2(LIR_OprFact::illegalOpr)
1933     , _tmp3(LIR_OprFact::illegalOpr)
1934     , _tmp4(LIR_OprFact::illegalOpr)
1935     , _tmp5(LIR_OprFact::illegalOpr)
1936     , _condition(condition) {
1937     assert(code == lir_cmove, "code check");
1938     assert(type != T_ILLEGAL, "cmove should have type");
1939   }
1940 
1941   LIR_Opr in_opr1() const                        { return _opr1; }
1942   LIR_Opr in_opr2() const                        { return _opr2; }
1943   LIR_Opr in_opr3() const                        { return _opr3; }
1944   LIR_Opr in_opr4() const                        { return _opr4; }
1945   BasicType type()  const                        { return _type; }
1946   LIR_Opr tmp1_opr() const                       { return _tmp1; }
1947   LIR_Opr tmp2_opr() const                       { return _tmp2; }
1948   LIR_Opr tmp3_opr() const                       { return _tmp3; }
1949   LIR_Opr tmp4_opr() const                       { return _tmp4; }
1950   LIR_Opr tmp5_opr() const                       { return _tmp5; }
1951 
1952   LIR_Condition condition() const                { return _condition; }
1953   void set_condition(LIR_Condition condition)    { _condition = condition; }
1954 
1955   void set_in_opr1(LIR_Opr opr)                  { _opr1 = opr; }
1956   void set_in_opr2(LIR_Opr opr)                  { _opr2 = opr; }
1957   void set_in_opr3(LIR_Opr opr)                  { _opr3 = opr; }
1958   void set_in_opr4(LIR_Opr opr)                  { _opr4 = opr; }
1959   virtual void emit_code(LIR_Assembler* masm);
1960   virtual LIR_Op4* as_Op4() { return this; }
1961 
1962   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1963 };
1964 
1965 //--------------------------------
1966 class LabelObj: public CompilationResourceObj {
1967  private:
1968   Label _label;
1969  public:
1970   LabelObj()                                     {}
1971   Label* label()                                 { return &_label; }
1972 };
1973 
1974 
1975 class LIR_OpLock: public LIR_Op {
1976  friend class LIR_OpVisitState;
1977 
1978  private:
1979   LIR_Opr _hdr;
1980   LIR_Opr _obj;
1981   LIR_Opr _lock;
1982   LIR_Opr _scratch;
1983   CodeStub* _stub;
1984   CodeStub* _throw_imse_stub;
1985  public:
1986   LIR_OpLock(LIR_Code code, LIR_Opr hdr, LIR_Opr obj, LIR_Opr lock, LIR_Opr scratch, CodeStub* stub, CodeEmitInfo* info, CodeStub* throw_imse_stub=NULL)
1987     : LIR_Op(code, LIR_OprFact::illegalOpr, info)
1988     , _hdr(hdr)
1989     , _obj(obj)
1990     , _lock(lock)
1991     , _scratch(scratch)
1992     , _stub(stub)
1993     , _throw_imse_stub(throw_imse_stub)                    {}
1994 
1995   LIR_Opr hdr_opr() const                        { return _hdr; }
1996   LIR_Opr obj_opr() const                        { return _obj; }
1997   LIR_Opr lock_opr() const                       { return _lock; }
1998   LIR_Opr scratch_opr() const                    { return _scratch; }
1999   CodeStub* stub() const                         { return _stub; }
2000   CodeStub* throw_imse_stub() const              { return _throw_imse_stub; }
2001 
2002   virtual void emit_code(LIR_Assembler* masm);
2003   virtual LIR_OpLock* as_OpLock() { return this; }
2004   void print_instr(outputStream* out) const PRODUCT_RETURN;
2005 };
2006 
2007 class LIR_OpLoadKlass: public LIR_Op {
2008   friend class LIR_OpVisitState;
2009 
2010  private:
2011   LIR_Opr _obj;
2012  public:
2013   LIR_OpLoadKlass(LIR_Opr obj, LIR_Opr result, CodeEmitInfo* info)
2014     : LIR_Op(lir_load_klass, result, info)
2015     , _obj(obj)
2016     {}
2017 
2018   LIR_Opr obj()        const { return _obj;  }
2019 
2020   virtual LIR_OpLoadKlass* as_OpLoadKlass() { return this; }
2021   virtual void emit_code(LIR_Assembler* masm);
2022   void print_instr(outputStream* out) const PRODUCT_RETURN;
2023 };
2024 
2025 class LIR_OpDelay: public LIR_Op {
2026  friend class LIR_OpVisitState;
2027 
2028  private:
2029   LIR_Op* _op;
2030 
2031  public:
2032   LIR_OpDelay(LIR_Op* op, CodeEmitInfo* info):
2033     LIR_Op(lir_delay_slot, LIR_OprFact::illegalOpr, info),
2034     _op(op) {
2035     assert(op->code() == lir_nop, "should be filling with nops");
2036   }
2037   virtual void emit_code(LIR_Assembler* masm);
2038   virtual LIR_OpDelay* as_OpDelay() { return this; }
2039   void print_instr(outputStream* out) const PRODUCT_RETURN;
2040   LIR_Op* delay_op() const { return _op; }
2041   CodeEmitInfo* call_info() const { return info(); }
2042 };
2043 
2044 #ifdef ASSERT
2045 // LIR_OpAssert
2046 class LIR_OpAssert : public LIR_Op2 {
2047  friend class LIR_OpVisitState;
2048 
2049  private:
2050   const char* _msg;
2051   bool        _halt;
2052 
2053  public:
2054   LIR_OpAssert(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, const char* msg, bool halt)
2055     : LIR_Op2(lir_assert, condition, opr1, opr2)
2056     , _msg(msg)
2057     , _halt(halt) {
2058   }
2059 
2060   const char* msg() const                        { return _msg; }
2061   bool        halt() const                       { return _halt; }
2062 
2063   virtual void emit_code(LIR_Assembler* masm);
2064   virtual LIR_OpAssert* as_OpAssert()            { return this; }
2065   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
2066 };
2067 #endif
2068 
2069 // LIR_OpCompareAndSwap
2070 class LIR_OpCompareAndSwap : public LIR_Op {
2071  friend class LIR_OpVisitState;
2072 
2073  private:
2074   LIR_Opr _addr;
2075   LIR_Opr _cmp_value;
2076   LIR_Opr _new_value;
2077   LIR_Opr _tmp1;
2078   LIR_Opr _tmp2;
2079 
2080  public:
2081   LIR_OpCompareAndSwap(LIR_Code code, LIR_Opr addr, LIR_Opr cmp_value, LIR_Opr new_value,
2082                        LIR_Opr t1, LIR_Opr t2, LIR_Opr result)
2083     : LIR_Op(code, result, NULL)  // no result, no info
2084     , _addr(addr)
2085     , _cmp_value(cmp_value)
2086     , _new_value(new_value)
2087     , _tmp1(t1)
2088     , _tmp2(t2)                                  { }
2089 
2090   LIR_Opr addr()        const                    { return _addr;  }
2091   LIR_Opr cmp_value()   const                    { return _cmp_value; }
2092   LIR_Opr new_value()   const                    { return _new_value; }
2093   LIR_Opr tmp1()        const                    { return _tmp1;      }
2094   LIR_Opr tmp2()        const                    { return _tmp2;      }
2095 
2096   virtual void emit_code(LIR_Assembler* masm);
2097   virtual LIR_OpCompareAndSwap * as_OpCompareAndSwap () { return this; }
2098   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
2099 };
2100 
2101 // LIR_OpProfileCall
2102 class LIR_OpProfileCall : public LIR_Op {
2103  friend class LIR_OpVisitState;
2104 
2105  private:
2106   ciMethod* _profiled_method;
2107   int       _profiled_bci;
2108   ciMethod* _profiled_callee;
2109   LIR_Opr   _mdo;
2110   LIR_Opr   _recv;
2111   LIR_Opr   _tmp1;
2112   ciKlass*  _known_holder;
2113 
2114  public:
2115   // Destroys recv
2116   LIR_OpProfileCall(ciMethod* profiled_method, int profiled_bci, ciMethod* profiled_callee, LIR_Opr mdo, LIR_Opr recv, LIR_Opr t1, ciKlass* known_holder)
2117     : LIR_Op(lir_profile_call, LIR_OprFact::illegalOpr, NULL)  // no result, no info
2118     , _profiled_method(profiled_method)
2119     , _profiled_bci(profiled_bci)
2120     , _profiled_callee(profiled_callee)
2121     , _mdo(mdo)
2122     , _recv(recv)
2123     , _tmp1(t1)
2124     , _known_holder(known_holder)                { }
2125 
2126   ciMethod* profiled_method() const              { return _profiled_method;  }
2127   int       profiled_bci()    const              { return _profiled_bci;     }
2128   ciMethod* profiled_callee() const              { return _profiled_callee;  }
2129   LIR_Opr   mdo()             const              { return _mdo;              }
2130   LIR_Opr   recv()            const              { return _recv;             }
2131   LIR_Opr   tmp1()            const              { return _tmp1;             }
2132   ciKlass*  known_holder()    const              { return _known_holder;     }
2133 
2134   virtual void emit_code(LIR_Assembler* masm);
2135   virtual LIR_OpProfileCall* as_OpProfileCall() { return this; }
2136   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
2137   bool should_profile_receiver_type() const {
2138     bool callee_is_static = _profiled_callee->is_loaded() && _profiled_callee->is_static();
2139     Bytecodes::Code bc = _profiled_method->java_code_at_bci(_profiled_bci);
2140     bool call_is_virtual = (bc == Bytecodes::_invokevirtual && !_profiled_callee->can_be_statically_bound()) || bc == Bytecodes::_invokeinterface;
2141     return C1ProfileVirtualCalls && call_is_virtual && !callee_is_static;
2142   }
2143 };
2144 
2145 // LIR_OpProfileType
2146 class LIR_OpProfileType : public LIR_Op {
2147  friend class LIR_OpVisitState;
2148 
2149  private:
2150   LIR_Opr      _mdp;
2151   LIR_Opr      _obj;
2152   LIR_Opr      _tmp;
2153   ciKlass*     _exact_klass;   // non NULL if we know the klass statically (no need to load it from _obj)
2154   intptr_t     _current_klass; // what the profiling currently reports
2155   bool         _not_null;      // true if we know statically that _obj cannot be null
2156   bool         _no_conflict;   // true if we're profling parameters, _exact_klass is not NULL and we know
2157                                // _exact_klass it the only possible type for this parameter in any context.
2158 
2159  public:
2160   // Destroys recv
2161   LIR_OpProfileType(LIR_Opr mdp, LIR_Opr obj, ciKlass* exact_klass, intptr_t current_klass, LIR_Opr tmp, bool not_null, bool no_conflict)
2162     : LIR_Op(lir_profile_type, LIR_OprFact::illegalOpr, NULL)  // no result, no info
2163     , _mdp(mdp)
2164     , _obj(obj)
2165     , _tmp(tmp)
2166     , _exact_klass(exact_klass)
2167     , _current_klass(current_klass)
2168     , _not_null(not_null)
2169     , _no_conflict(no_conflict) { }
2170 
2171   LIR_Opr      mdp()              const             { return _mdp;              }
2172   LIR_Opr      obj()              const             { return _obj;              }
2173   LIR_Opr      tmp()              const             { return _tmp;              }
2174   ciKlass*     exact_klass()      const             { return _exact_klass;      }
2175   intptr_t     current_klass()    const             { return _current_klass;    }
2176   bool         not_null()         const             { return _not_null;         }
2177   bool         no_conflict()      const             { return _no_conflict;      }
2178 
2179   virtual void emit_code(LIR_Assembler* masm);
2180   virtual LIR_OpProfileType* as_OpProfileType() { return this; }
2181   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
2182 };
2183 
2184 // LIR_OpProfileInlineType
2185 class LIR_OpProfileInlineType : public LIR_Op {
2186  friend class LIR_OpVisitState;
2187 
2188  private:
2189   LIR_Opr      _mdp;
2190   LIR_Opr      _obj;
2191   int          _flag;
2192   LIR_Opr      _tmp;
2193   bool         _not_null;      // true if we know statically that _obj cannot be null
2194 
2195  public:
2196   // Destroys recv
2197   LIR_OpProfileInlineType(LIR_Opr mdp, LIR_Opr obj, int flag, LIR_Opr tmp, bool not_null)
2198     : LIR_Op(lir_profile_inline_type, LIR_OprFact::illegalOpr, NULL)  // no result, no info
2199     , _mdp(mdp)
2200     , _obj(obj)
2201     , _flag(flag)
2202     , _tmp(tmp)
2203     , _not_null(not_null) { }
2204 
2205   LIR_Opr      mdp()              const             { return _mdp;              }
2206   LIR_Opr      obj()              const             { return _obj;              }
2207   int          flag()             const             { return _flag;             }
2208   LIR_Opr      tmp()              const             { return _tmp;              }
2209   bool         not_null()         const             { return _not_null;         }
2210 
2211   virtual void emit_code(LIR_Assembler* masm);
2212   virtual LIR_OpProfileInlineType* as_OpProfileInlineType() { return this; }
2213   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
2214 };
2215 
2216 class LIR_InsertionBuffer;
2217 
2218 //--------------------------------LIR_List---------------------------------------------------
2219 // Maintains a list of LIR instructions (one instance of LIR_List per basic block)
2220 // The LIR instructions are appended by the LIR_List class itself;
2221 //
2222 // Notes:
2223 // - all offsets are(should be) in bytes
2224 // - local positions are specified with an offset, with offset 0 being local 0
2225 
2226 class LIR_List: public CompilationResourceObj {
2227  private:
2228   LIR_OpList  _operations;
2229 
2230   Compilation*  _compilation;
2231 #ifndef PRODUCT
2232   BlockBegin*   _block;
2233 #endif
2234 #ifdef ASSERT
2235   const char *  _file;
2236   int           _line;
2237 #endif
2238 #ifdef RISCV
2239   LIR_Opr       _cmp_opr1;
2240   LIR_Opr       _cmp_opr2;
2241 #endif
2242 
2243  public:
2244   void append(LIR_Op* op) {
2245     if (op->source() == NULL)
2246       op->set_source(_compilation->current_instruction());
2247 #ifndef PRODUCT
2248     if (PrintIRWithLIR) {
2249       _compilation->maybe_print_current_instruction();
2250       op->print(); tty->cr();
2251     }
2252 #endif // PRODUCT
2253 
2254 #ifdef RISCV
2255     set_cmp_oprs(op);
2256     // lir_cmp set cmp oprs only on riscv
2257     if (op->code() == lir_cmp) return;
2258 #endif
2259 
2260     _operations.append(op);
2261 
2262 #ifdef ASSERT
2263     op->verify();
2264     op->set_file_and_line(_file, _line);
2265     _file = NULL;
2266     _line = 0;
2267 #endif
2268   }
2269 
2270   LIR_List(Compilation* compilation, BlockBegin* block = NULL);
2271 
2272 #ifdef ASSERT
2273   void set_file_and_line(const char * file, int line);
2274 #endif
2275 
2276 #ifdef RISCV
2277   void set_cmp_oprs(LIR_Op* op);
2278 #endif
2279 
2280   //---------- accessors ---------------
2281   LIR_OpList* instructions_list()                { return &_operations; }
2282   int         length() const                     { return _operations.length(); }
2283   LIR_Op*     at(int i) const                    { return _operations.at(i); }
2284 
2285   NOT_PRODUCT(BlockBegin* block() const          { return _block; });
2286 
2287   // insert LIR_Ops in buffer to right places in LIR_List
2288   void append(LIR_InsertionBuffer* buffer);
2289 
2290   //---------- mutators ---------------
2291   void insert_before(int i, LIR_List* op_list)   { _operations.insert_before(i, op_list->instructions_list()); }
2292   void insert_before(int i, LIR_Op* op)          { _operations.insert_before(i, op); }
2293   void remove_at(int i)                          { _operations.remove_at(i); }
2294 
2295   //---------- printing -------------
2296   void print_instructions() PRODUCT_RETURN;
2297 
2298 
2299   //---------- instructions -------------
2300   void call_opt_virtual(ciMethod* method, LIR_Opr receiver, LIR_Opr result,
2301                         address dest, LIR_OprList* arguments,
2302                         CodeEmitInfo* info) {
2303     append(new LIR_OpJavaCall(lir_optvirtual_call, method, receiver, result, dest, arguments, info));
2304   }
2305   void call_static(ciMethod* method, LIR_Opr result,
2306                    address dest, LIR_OprList* arguments, CodeEmitInfo* info) {
2307     append(new LIR_OpJavaCall(lir_static_call, method, LIR_OprFact::illegalOpr, result, dest, arguments, info));
2308   }
2309   void call_icvirtual(ciMethod* method, LIR_Opr receiver, LIR_Opr result,
2310                       address dest, LIR_OprList* arguments, CodeEmitInfo* info) {
2311     append(new LIR_OpJavaCall(lir_icvirtual_call, method, receiver, result, dest, arguments, info));
2312   }
2313   void call_dynamic(ciMethod* method, LIR_Opr receiver, LIR_Opr result,
2314                     address dest, LIR_OprList* arguments, CodeEmitInfo* info) {
2315     append(new LIR_OpJavaCall(lir_dynamic_call, method, receiver, result, dest, arguments, info));
2316   }
2317 
2318   void get_thread(LIR_Opr result)                { append(new LIR_Op0(lir_get_thread, result)); }
2319   void membar()                                  { append(new LIR_Op0(lir_membar)); }
2320   void membar_acquire()                          { append(new LIR_Op0(lir_membar_acquire)); }
2321   void membar_release()                          { append(new LIR_Op0(lir_membar_release)); }
2322   void membar_loadload()                         { append(new LIR_Op0(lir_membar_loadload)); }
2323   void membar_storestore()                       { append(new LIR_Op0(lir_membar_storestore)); }
2324   void membar_loadstore()                        { append(new LIR_Op0(lir_membar_loadstore)); }
2325   void membar_storeload()                        { append(new LIR_Op0(lir_membar_storeload)); }
2326 
2327   void nop()                                     { append(new LIR_Op0(lir_nop)); }
2328 
2329   void std_entry(LIR_Opr receiver)               { append(new LIR_Op0(lir_std_entry, receiver)); }
2330   void osr_entry(LIR_Opr osrPointer)             { append(new LIR_Op0(lir_osr_entry, osrPointer)); }
2331 
2332   void on_spin_wait()                            { append(new LIR_Op0(lir_on_spin_wait)); }
2333 
2334   void branch_destination(Label* lbl)            { append(new LIR_OpLabel(lbl)); }
2335 
2336   void leal(LIR_Opr from, LIR_Opr result_reg, LIR_PatchCode patch_code = lir_patch_none, CodeEmitInfo* info = NULL) { append(new LIR_Op1(lir_leal, from, result_reg, T_ILLEGAL, patch_code, info)); }
2337 
2338   // result is a stack location for old backend and vreg for UseLinearScan
2339   // stack_loc_temp is an illegal register for old backend
2340   void roundfp(LIR_Opr reg, LIR_Opr stack_loc_temp, LIR_Opr result) { append(new LIR_OpRoundFP(reg, stack_loc_temp, result)); }
2341   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)); }
2342   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)); }
2343   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)); }
2344   void move_wide(LIR_Address* src, LIR_Opr dst, CodeEmitInfo* info = NULL) {
2345     if (UseCompressedOops) {
2346       append(new LIR_Op1(lir_move, LIR_OprFact::address(src), dst, src->type(), lir_patch_none, info, lir_move_wide));
2347     } else {
2348       move(src, dst, info);
2349     }
2350   }
2351   void move_wide(LIR_Opr src, LIR_Address* dst, CodeEmitInfo* info = NULL) {
2352     if (UseCompressedOops) {
2353       append(new LIR_Op1(lir_move, src, LIR_OprFact::address(dst), dst->type(), lir_patch_none, info, lir_move_wide));
2354     } else {
2355       move(src, dst, info);
2356     }
2357   }
2358   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)); }
2359 
2360   void oop2reg  (jobject o, LIR_Opr reg)         { assert(reg->type() == T_OBJECT, "bad reg"); append(new LIR_Op1(lir_move, LIR_OprFact::oopConst(o),    reg));   }
2361   void oop2reg_patch(jobject o, LIR_Opr reg, CodeEmitInfo* info);
2362 
2363   void metadata2reg  (Metadata* o, LIR_Opr reg)  { assert(reg->type() == T_METADATA, "bad reg"); append(new LIR_Op1(lir_move, LIR_OprFact::metadataConst(o), reg));   }
2364   void klass2reg_patch(Metadata* o, LIR_Opr reg, CodeEmitInfo* info);
2365 
2366   void safepoint(LIR_Opr tmp, CodeEmitInfo* info)  { append(new LIR_Op1(lir_safepoint, tmp, info)); }
2367   void return_op(LIR_Opr result)                   { append(new LIR_OpReturn(result)); }
2368 
2369   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)); }
2370 
2371   void logical_and (LIR_Opr left, LIR_Opr right, LIR_Opr dst) { append(new LIR_Op2(lir_logic_and,  left, right, dst)); }
2372   void logical_or  (LIR_Opr left, LIR_Opr right, LIR_Opr dst) { append(new LIR_Op2(lir_logic_or,   left, right, dst)); }
2373   void logical_xor (LIR_Opr left, LIR_Opr right, LIR_Opr dst) { append(new LIR_Op2(lir_logic_xor,  left, right, dst)); }
2374 
2375   void null_check(LIR_Opr opr, CodeEmitInfo* info, bool deoptimize_on_null = false);
2376   void throw_exception(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) {
2377     append(new LIR_Op2(lir_throw, exceptionPC, exceptionOop, LIR_OprFact::illegalOpr, info));
2378   }
2379   void unwind_exception(LIR_Opr exceptionOop) {
2380     append(new LIR_Op1(lir_unwind, exceptionOop));
2381   }
2382 
2383   void push(LIR_Opr opr)                                   { append(new LIR_Op1(lir_push, opr)); }
2384   void pop(LIR_Opr reg)                                    { append(new LIR_Op1(lir_pop,  reg)); }
2385 
2386   void cmp(LIR_Condition condition, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info = NULL) {
2387     append(new LIR_Op2(lir_cmp, condition, left, right, info));
2388   }
2389   void cmp(LIR_Condition condition, LIR_Opr left, int right, CodeEmitInfo* info = NULL) {
2390     cmp(condition, left, LIR_OprFact::intConst(right), info);
2391   }
2392 
2393   void cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info);
2394   void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Address* addr, CodeEmitInfo* info);
2395 
2396   void cmove(LIR_Condition condition, LIR_Opr src1, LIR_Opr src2, LIR_Opr dst, BasicType type,
2397              LIR_Opr cmp_opr1 = LIR_OprFact::illegalOpr, LIR_Opr cmp_opr2 = LIR_OprFact::illegalOpr) {
2398     append(new LIR_Op4(lir_cmove, condition, src1, src2, cmp_opr1, cmp_opr2, dst, type));
2399   }
2400 
2401   void cas_long(LIR_Opr addr, LIR_Opr cmp_value, LIR_Opr new_value,
2402                 LIR_Opr t1, LIR_Opr t2, LIR_Opr result = LIR_OprFact::illegalOpr);
2403   void cas_obj(LIR_Opr addr, LIR_Opr cmp_value, LIR_Opr new_value,
2404                LIR_Opr t1, LIR_Opr t2, LIR_Opr result = LIR_OprFact::illegalOpr);
2405   void cas_int(LIR_Opr addr, LIR_Opr cmp_value, LIR_Opr new_value,
2406                LIR_Opr t1, LIR_Opr t2, LIR_Opr result = LIR_OprFact::illegalOpr);
2407 
2408   void abs (LIR_Opr from, LIR_Opr to, LIR_Opr tmp)                { append(new LIR_Op2(lir_abs , from, tmp, to)); }
2409   void negate(LIR_Opr from, LIR_Opr to, LIR_Opr tmp = LIR_OprFact::illegalOpr)              { append(new LIR_Op2(lir_neg, from, tmp, to)); }
2410   void sqrt(LIR_Opr from, LIR_Opr to, LIR_Opr tmp)                { append(new LIR_Op2(lir_sqrt, from, tmp, to)); }
2411   void fmad(LIR_Opr from, LIR_Opr from1, LIR_Opr from2, LIR_Opr to) { append(new LIR_Op3(lir_fmad, from, from1, from2, to)); }
2412   void fmaf(LIR_Opr from, LIR_Opr from1, LIR_Opr from2, LIR_Opr to) { append(new LIR_Op3(lir_fmaf, from, from1, from2, to)); }
2413   void log10 (LIR_Opr from, LIR_Opr to, LIR_Opr tmp)              { append(new LIR_Op2(lir_log10, from, LIR_OprFact::illegalOpr, to, tmp)); }
2414   void tan (LIR_Opr from, LIR_Opr to, LIR_Opr tmp1, LIR_Opr tmp2) { append(new LIR_Op2(lir_tan , from, tmp1, to, tmp2)); }
2415 
2416   void add (LIR_Opr left, LIR_Opr right, LIR_Opr res)      { append(new LIR_Op2(lir_add, left, right, res)); }
2417   void sub (LIR_Opr left, LIR_Opr right, LIR_Opr res, CodeEmitInfo* info = NULL) { append(new LIR_Op2(lir_sub, left, right, res, info)); }
2418   void mul (LIR_Opr left, LIR_Opr right, LIR_Opr res) { append(new LIR_Op2(lir_mul, left, right, res)); }
2419   void mul (LIR_Opr left, LIR_Opr right, LIR_Opr res, LIR_Opr tmp) { append(new LIR_Op2(lir_mul, left, right, res, tmp)); }
2420   void div (LIR_Opr left, LIR_Opr right, LIR_Opr res, CodeEmitInfo* info = NULL)      { append(new LIR_Op2(lir_div, left, right, res, info)); }
2421   void div (LIR_Opr left, LIR_Opr right, LIR_Opr res, LIR_Opr tmp) { append(new LIR_Op2(lir_div, left, right, res, tmp)); }
2422   void rem (LIR_Opr left, LIR_Opr right, LIR_Opr res, CodeEmitInfo* info = NULL)      { append(new LIR_Op2(lir_rem, left, right, res, info)); }
2423 
2424   void volatile_load_mem_reg(LIR_Address* address, LIR_Opr dst, CodeEmitInfo* info, LIR_PatchCode patch_code = lir_patch_none);
2425   void volatile_load_unsafe_reg(LIR_Opr base, LIR_Opr offset, LIR_Opr dst, BasicType type, CodeEmitInfo* info, LIR_PatchCode patch_code);
2426 
2427   void load(LIR_Address* addr, LIR_Opr src, CodeEmitInfo* info = NULL, LIR_PatchCode patch_code = lir_patch_none);
2428 
2429   void store_mem_int(jint v,    LIR_Opr base, int offset_in_bytes, BasicType type, CodeEmitInfo* info, LIR_PatchCode patch_code = lir_patch_none);
2430   void store_mem_oop(jobject o, LIR_Opr base, int offset_in_bytes, BasicType type, CodeEmitInfo* info, LIR_PatchCode patch_code = lir_patch_none);
2431   void store(LIR_Opr src, LIR_Address* addr, CodeEmitInfo* info = NULL, LIR_PatchCode patch_code = lir_patch_none);
2432   void volatile_store_mem_reg(LIR_Opr src, LIR_Address* address, CodeEmitInfo* info, LIR_PatchCode patch_code = lir_patch_none);
2433   void volatile_store_unsafe_reg(LIR_Opr src, LIR_Opr base, LIR_Opr offset, BasicType type, CodeEmitInfo* info, LIR_PatchCode patch_code);
2434 
2435   void idiv(LIR_Opr left, LIR_Opr right, LIR_Opr res, LIR_Opr tmp, CodeEmitInfo* info);
2436   void idiv(LIR_Opr left, int   right, LIR_Opr res, LIR_Opr tmp, CodeEmitInfo* info);
2437   void irem(LIR_Opr left, LIR_Opr right, LIR_Opr res, LIR_Opr tmp, CodeEmitInfo* info);
2438   void irem(LIR_Opr left, int   right, LIR_Opr res, LIR_Opr tmp, CodeEmitInfo* info);
2439 
2440   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);
2441   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);
2442 
2443   // jump is an unconditional branch
2444   void jump(BlockBegin* block) {
2445     append(new LIR_OpBranch(lir_cond_always, block));
2446   }
2447   void jump(CodeStub* stub) {
2448     append(new LIR_OpBranch(lir_cond_always, stub));
2449   }
2450   void branch(LIR_Condition cond, Label* lbl) {
2451     append(new LIR_OpBranch(cond, lbl));
2452   }
2453   // Should not be used for fp comparisons
2454   void branch(LIR_Condition cond, BlockBegin* block) {
2455     append(new LIR_OpBranch(cond, block));
2456   }
2457   // Should not be used for fp comparisons
2458   void branch(LIR_Condition cond, CodeStub* stub) {
2459     append(new LIR_OpBranch(cond, stub));
2460   }
2461   // Should only be used for fp comparisons
2462   void branch(LIR_Condition cond, BlockBegin* block, BlockBegin* unordered) {
2463     append(new LIR_OpBranch(cond, block, unordered));
2464   }
2465 
2466   void shift_left(LIR_Opr value, LIR_Opr count, LIR_Opr dst, LIR_Opr tmp);
2467   void shift_right(LIR_Opr value, LIR_Opr count, LIR_Opr dst, LIR_Opr tmp);
2468   void unsigned_shift_right(LIR_Opr value, LIR_Opr count, LIR_Opr dst, LIR_Opr tmp);
2469 
2470   void shift_left(LIR_Opr value, int count, LIR_Opr dst)       { shift_left(value, LIR_OprFact::intConst(count), dst, LIR_OprFact::illegalOpr); }
2471   void shift_right(LIR_Opr value, int count, LIR_Opr dst)      { shift_right(value, LIR_OprFact::intConst(count), dst, LIR_OprFact::illegalOpr); }
2472   void unsigned_shift_right(LIR_Opr value, int count, LIR_Opr dst) { unsigned_shift_right(value, LIR_OprFact::intConst(count), dst, LIR_OprFact::illegalOpr); }
2473 
2474   void lcmp2int(LIR_Opr left, LIR_Opr right, LIR_Opr dst)        { append(new LIR_Op2(lir_cmp_l2i,  left, right, dst)); }
2475   void fcmp2int(LIR_Opr left, LIR_Opr right, LIR_Opr dst, bool is_unordered_less);
2476 
2477   void call_runtime_leaf(address routine, LIR_Opr tmp, LIR_Opr result, LIR_OprList* arguments) {
2478     append(new LIR_OpRTCall(routine, tmp, result, arguments));
2479   }
2480 
2481   void call_runtime(address routine, LIR_Opr tmp, LIR_Opr result,
2482                     LIR_OprList* arguments, CodeEmitInfo* info) {
2483     append(new LIR_OpRTCall(routine, tmp, result, arguments, info));
2484   }
2485 
2486   void load_stack_address_monitor(int monitor_ix, LIR_Opr dst)  { append(new LIR_Op1(lir_monaddr, LIR_OprFact::intConst(monitor_ix), dst)); }
2487   void unlock_object(LIR_Opr hdr, LIR_Opr obj, LIR_Opr lock, LIR_Opr scratch, CodeStub* stub);
2488   void lock_object(LIR_Opr hdr, LIR_Opr obj, LIR_Opr lock, LIR_Opr scratch, CodeStub* stub, CodeEmitInfo* info, CodeStub* throw_imse_stub=NULL);
2489 
2490   void breakpoint()                                                  { append(new LIR_Op0(lir_breakpoint)); }
2491 
2492   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)); }
2493 
2494   void update_crc32(LIR_Opr crc, LIR_Opr val, LIR_Opr res)  { append(new LIR_OpUpdateCRC32(crc, val, res)); }
2495 
2496   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);
2497   void store_check(LIR_Opr object, LIR_Opr array, LIR_Opr tmp1, LIR_Opr tmp2, LIR_Opr tmp3, CodeEmitInfo* info_for_exception, ciMethod* profiled_method, int profiled_bci);
2498   void check_flattened_array(LIR_Opr array, LIR_Opr value, LIR_Opr tmp, CodeStub* stub);
2499   void check_null_free_array(LIR_Opr array, LIR_Opr tmp);
2500   void substitutability_check(LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr equal_result, LIR_Opr not_equal_result,
2501                               LIR_Opr tmp1, LIR_Opr tmp2,
2502                               ciKlass* left_klass, ciKlass* right_klass, LIR_Opr left_klass_op, LIR_Opr right_klass_op,
2503                               CodeEmitInfo* info, CodeStub* stub);
2504 
2505   void checkcast (LIR_Opr result, LIR_Opr object, ciKlass* klass,
2506                   LIR_Opr tmp1, LIR_Opr tmp2, LIR_Opr tmp3, bool fast_check,
2507                   CodeEmitInfo* info_for_exception, CodeEmitInfo* info_for_patch, CodeStub* stub,
2508                   ciMethod* profiled_method, int profiled_bci, bool is_null_free);
2509   // MethodData* profiling
2510   void profile_call(ciMethod* method, int bci, ciMethod* callee, LIR_Opr mdo, LIR_Opr recv, LIR_Opr t1, ciKlass* cha_klass) {
2511     append(new LIR_OpProfileCall(method, bci, callee, mdo, recv, t1, cha_klass));
2512   }
2513   void profile_type(LIR_Address* mdp, LIR_Opr obj, ciKlass* exact_klass, intptr_t current_klass, LIR_Opr tmp, bool not_null, bool no_conflict) {
2514     append(new LIR_OpProfileType(LIR_OprFact::address(mdp), obj, exact_klass, current_klass, tmp, not_null, no_conflict));
2515   }
2516   void profile_inline_type(LIR_Address* mdp, LIR_Opr obj, int flag, LIR_Opr tmp, bool not_null) {
2517     append(new LIR_OpProfileInlineType(LIR_OprFact::address(mdp), obj, flag, tmp, not_null));
2518   }
2519 
2520   void xadd(LIR_Opr src, LIR_Opr add, LIR_Opr res, LIR_Opr tmp) { append(new LIR_Op2(lir_xadd, src, add, res, tmp)); }
2521   void xchg(LIR_Opr src, LIR_Opr set, LIR_Opr res, LIR_Opr tmp) { append(new LIR_Op2(lir_xchg, src, set, res, tmp)); }
2522 
2523   void load_klass(LIR_Opr obj, LIR_Opr result, CodeEmitInfo* info) { append(new LIR_OpLoadKlass(obj, result, info)); }
2524 
2525 #ifdef ASSERT
2526   void lir_assert(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, const char* msg, bool halt) { append(new LIR_OpAssert(condition, opr1, opr2, msg, halt)); }
2527 #endif
2528 };
2529 
2530 void print_LIR(BlockList* blocks);
2531 
2532 class LIR_InsertionBuffer : public CompilationResourceObj {
2533  private:
2534   LIR_List*   _lir;   // the lir list where ops of this buffer should be inserted later (NULL when uninitialized)
2535 
2536   // list of insertion points. index and count are stored alternately:
2537   // _index_and_count[i * 2]:     the index into lir list where "count" ops should be inserted
2538   // _index_and_count[i * 2 + 1]: the number of ops to be inserted at index
2539   intStack    _index_and_count;
2540 
2541   // the LIR_Ops to be inserted
2542   LIR_OpList  _ops;
2543 
2544   void append_new(int index, int count)  { _index_and_count.append(index); _index_and_count.append(count); }
2545   void set_index_at(int i, int value)    { _index_and_count.at_put((i << 1),     value); }
2546   void set_count_at(int i, int value)    { _index_and_count.at_put((i << 1) + 1, value); }
2547 
2548 #ifdef ASSERT
2549   void verify();
2550 #endif
2551  public:
2552   LIR_InsertionBuffer() : _lir(NULL), _index_and_count(8), _ops(8) { }
2553 
2554   // must be called before using the insertion buffer
2555   void init(LIR_List* lir)  { assert(!initialized(), "already initialized"); _lir = lir; _index_and_count.clear(); _ops.clear(); }
2556   bool initialized() const  { return _lir != NULL; }
2557   // called automatically when the buffer is appended to the LIR_List
2558   void finish()             { _lir = NULL; }
2559 
2560   // accessors
2561   LIR_List*  lir_list() const             { return _lir; }
2562   int number_of_insertion_points() const  { return _index_and_count.length() >> 1; }
2563   int index_at(int i) const               { return _index_and_count.at((i << 1));     }
2564   int count_at(int i) const               { return _index_and_count.at((i << 1) + 1); }
2565 
2566   int number_of_ops() const               { return _ops.length(); }
2567   LIR_Op* op_at(int i) const              { return _ops.at(i); }
2568 
2569   // append an instruction to the buffer
2570   void append(int index, LIR_Op* op);
2571 
2572   // instruction
2573   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)); }
2574 };
2575 
2576 
2577 //
2578 // LIR_OpVisitState is used for manipulating LIR_Ops in an abstract way.
2579 // Calling a LIR_Op's visit function with a LIR_OpVisitState causes
2580 // information about the input, output and temporaries used by the
2581 // op to be recorded.  It also records whether the op has call semantics
2582 // and also records all the CodeEmitInfos used by this op.
2583 //
2584 
2585 
2586 class LIR_OpVisitState: public StackObj {
2587  public:
2588   typedef enum { inputMode, firstMode = inputMode, tempMode, outputMode, numModes, invalidMode = -1 } OprMode;
2589 
2590   enum {
2591     maxNumberOfOperands = 21,
2592     maxNumberOfInfos = 4
2593   };
2594 
2595  private:
2596   LIR_Op*          _op;
2597 
2598   // optimization: the operands and infos are not stored in a variable-length
2599   //               list, but in a fixed-size array to save time of size checks and resizing
2600   int              _oprs_len[numModes];
2601   LIR_Opr*         _oprs_new[numModes][maxNumberOfOperands];
2602   int _info_len;
2603   CodeEmitInfo*    _info_new[maxNumberOfInfos];
2604 
2605   bool             _has_call;
2606   bool             _has_slow_case;
2607 
2608 
2609   // only include register operands
2610   // addresses are decomposed to the base and index registers
2611   // constants and stack operands are ignored
2612   void append(LIR_Opr& opr, OprMode mode) {
2613     assert(opr->is_valid(), "should not call this otherwise");
2614     assert(mode >= 0 && mode < numModes, "bad mode");
2615 
2616     if (opr->is_register()) {
2617        assert(_oprs_len[mode] < maxNumberOfOperands, "array overflow");
2618       _oprs_new[mode][_oprs_len[mode]++] = &opr;
2619 
2620     } else if (opr->is_pointer()) {
2621       LIR_Address* address = opr->as_address_ptr();
2622       if (address != NULL) {
2623         // special handling for addresses: add base and index register of the address
2624         // both are always input operands or temp if we want to extend
2625         // their liveness!
2626         if (mode == outputMode) {
2627           mode = inputMode;
2628         }
2629         assert (mode == inputMode || mode == tempMode, "input or temp only for addresses");
2630         if (address->_base->is_valid()) {
2631           assert(address->_base->is_register(), "must be");
2632           assert(_oprs_len[mode] < maxNumberOfOperands, "array overflow");
2633           _oprs_new[mode][_oprs_len[mode]++] = &address->_base;
2634         }
2635         if (address->_index->is_valid()) {
2636           assert(address->_index->is_register(), "must be");
2637           assert(_oprs_len[mode] < maxNumberOfOperands, "array overflow");
2638           _oprs_new[mode][_oprs_len[mode]++] = &address->_index;
2639         }
2640 
2641       } else {
2642         assert(opr->is_constant(), "constant operands are not processed");
2643       }
2644     } else {
2645       assert(opr->is_stack(), "stack operands are not processed");
2646     }
2647   }
2648 
2649   void append(CodeEmitInfo* info) {
2650     assert(info != NULL, "should not call this otherwise");
2651     assert(_info_len < maxNumberOfInfos, "array overflow");
2652     _info_new[_info_len++] = info;
2653   }
2654 
2655  public:
2656   LIR_OpVisitState()         { reset(); }
2657 
2658   LIR_Op* op() const         { return _op; }
2659   void set_op(LIR_Op* op)    { reset(); _op = op; }
2660 
2661   bool has_call() const      { return _has_call; }
2662   bool has_slow_case() const { return _has_slow_case; }
2663 
2664   void reset() {
2665     _op = NULL;
2666     _has_call = false;
2667     _has_slow_case = false;
2668 
2669     _oprs_len[inputMode] = 0;
2670     _oprs_len[tempMode] = 0;
2671     _oprs_len[outputMode] = 0;
2672     _info_len = 0;
2673   }
2674 
2675 
2676   int opr_count(OprMode mode) const {
2677     assert(mode >= 0 && mode < numModes, "bad mode");
2678     return _oprs_len[mode];
2679   }
2680 
2681   LIR_Opr opr_at(OprMode mode, int index) const {
2682     assert(mode >= 0 && mode < numModes, "bad mode");
2683     assert(index >= 0 && index < _oprs_len[mode], "index out of bound");
2684     return *_oprs_new[mode][index];
2685   }
2686 
2687   void set_opr_at(OprMode mode, int index, LIR_Opr opr) const {
2688     assert(mode >= 0 && mode < numModes, "bad mode");
2689     assert(index >= 0 && index < _oprs_len[mode], "index out of bound");
2690     *_oprs_new[mode][index] = opr;
2691   }
2692 
2693   int info_count() const {
2694     return _info_len;
2695   }
2696 
2697   CodeEmitInfo* info_at(int index) const {
2698     assert(index < _info_len, "index out of bounds");
2699     return _info_new[index];
2700   }
2701 
2702   XHandlers* all_xhandler();
2703 
2704   // collects all register operands of the instruction
2705   void visit(LIR_Op* op);
2706 
2707 #ifdef ASSERT
2708   // check that an operation has no operands
2709   bool no_operands(LIR_Op* op);
2710 #endif
2711 
2712   // LIR_Op visitor functions use these to fill in the state
2713   void do_input(LIR_Opr& opr)             { append(opr, LIR_OpVisitState::inputMode); }
2714   void do_output(LIR_Opr& opr)            { append(opr, LIR_OpVisitState::outputMode); }
2715   void do_temp(LIR_Opr& opr)              { append(opr, LIR_OpVisitState::tempMode); }
2716   void do_info(CodeEmitInfo* info)        { append(info); }
2717 
2718   void do_stub(CodeStub* stub);
2719   void do_call()                          { _has_call = true; }
2720   void do_slow_case()                     { _has_slow_case = true; }
2721   void do_slow_case(CodeEmitInfo* info) {
2722     _has_slow_case = true;
2723     append(info);
2724   }
2725 };
2726 
2727 
2728 inline LIR_Opr LIR_Opr::illegalOpr()   { return LIR_OprFact::illegalOpr; };
2729 
2730 inline LIR_Opr LIR_Opr::nullOpr()   { return LIR_OprFact::nullOpr; };
2731 
2732 #endif // SHARE_C1_C1_LIR_HPP