1 /*
   2  * Copyright (c) 2000, 2021, 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       opr-type opr-kind
 202   // +--------------+-------+-------+
 203   // [max...........|7 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  = pointer_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 {
 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   uintptr_t data() const                         { return 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     vreg_max = (1 << data_bits) - 1
 303   };
 304 
 305   static inline LIR_Opr illegalOpr();
 306   static inline LIR_Opr nullOpr();
 307 
 308   enum OprType {
 309       unknown_type  = 0 << type_shift    // means: not set (catch uninitialized types)
 310     , int_type      = 1 << type_shift
 311     , long_type     = 2 << type_shift
 312     , object_type   = 3 << type_shift
 313     , address_type  = 4 << type_shift
 314     , float_type    = 5 << type_shift
 315     , double_type   = 6 << type_shift
 316     , metadata_type = 7 << type_shift
 317   };
 318   friend OprType as_OprType(BasicType t);
 319   friend BasicType as_BasicType(OprType t);
 320 
 321   OprType type_field_valid() const               { assert(is_register() || is_stack(), "should not be called otherwise"); return (OprType)(value() & type_mask); }
 322   OprType type_field() const                     { return is_illegal() ? unknown_type : (OprType)(value() & type_mask); }
 323 
 324   static OprSize size_for(BasicType t) {
 325     switch (t) {
 326       case T_LONG:
 327       case T_DOUBLE:
 328         return double_size;
 329         break;
 330 
 331       case T_FLOAT:
 332       case T_BOOLEAN:
 333       case T_CHAR:
 334       case T_BYTE:
 335       case T_SHORT:
 336       case T_INT:
 337       case T_ADDRESS:
 338       case T_OBJECT:
 339       case T_ARRAY:
 340       case T_METADATA:
 341         return single_size;
 342         break;
 343 
 344       default:
 345         ShouldNotReachHere();
 346         return single_size;
 347       }
 348   }
 349 
 350 
 351   void validate_type() const PRODUCT_RETURN;
 352 
 353   BasicType type() const {
 354     if (is_pointer()) {
 355       return pointer()->type();
 356     }
 357     return as_BasicType(type_field());
 358   }
 359 
 360 
 361   ValueType* value_type() const                  { return as_ValueType(type()); }
 362 
 363   char type_char() const                         { return type_char((is_pointer()) ? pointer()->type() : type()); }
 364 
 365   bool is_equal(LIR_Opr opr) const         { return *this == opr; }
 366   // checks whether types are same
 367   bool is_same_type(LIR_Opr opr) const     {
 368     assert(type_field() != unknown_type &&
 369            opr->type_field() != unknown_type, "shouldn't see unknown_type");
 370     return type_field() == opr->type_field();
 371   }
 372   bool is_same_register(LIR_Opr opr) {
 373     return (is_register() && opr->is_register() &&
 374             kind_field() == opr->kind_field() &&
 375             (value() & no_type_mask) == (opr->value() & no_type_mask));
 376   }
 377 
 378   bool is_pointer() const      { return check_value_mask(pointer_mask, pointer_value); }
 379   bool is_illegal() const      { return kind_field() == illegal_value; }
 380   bool is_valid() const        { return kind_field() != illegal_value; }
 381 
 382   bool is_register() const     { return is_cpu_register() || is_fpu_register(); }
 383   bool is_virtual() const      { return is_virtual_cpu()  || is_virtual_fpu();  }
 384 
 385   bool is_constant() const     { return is_pointer() && pointer()->as_constant() != NULL; }
 386   bool is_address() const      { return is_pointer() && pointer()->as_address() != NULL; }
 387 
 388   bool is_float_kind() const   { return is_pointer() ? pointer()->is_float_kind() : (kind_field() == fpu_register); }
 389   bool is_oop() const;
 390 
 391   // semantic for fpu- and xmm-registers:
 392   // * is_float and is_double return true for xmm_registers
 393   //   (so is_single_fpu and is_single_xmm are true)
 394   // * So you must always check for is_???_xmm prior to is_???_fpu to
 395   //   distinguish between fpu- and xmm-registers
 396 
 397   bool is_stack() const        { validate_type(); return check_value_mask(kind_mask,                stack_value);                 }
 398   bool is_single_stack() const { validate_type(); return check_value_mask(kind_mask | size_mask,    stack_value  | single_size);  }
 399   bool is_double_stack() const { validate_type(); return check_value_mask(kind_mask | size_mask,    stack_value  | double_size);  }
 400 
 401   bool is_cpu_register() const { validate_type(); return check_value_mask(kind_mask,                cpu_register);                }
 402   bool is_virtual_cpu() const  { validate_type(); return check_value_mask(kind_mask | virtual_mask, cpu_register | virtual_mask); }
 403   bool is_fixed_cpu() const    { validate_type(); return check_value_mask(kind_mask | virtual_mask, cpu_register);                }
 404   bool is_single_cpu() const   { validate_type(); return check_value_mask(kind_mask | size_mask,    cpu_register | single_size);  }
 405   bool is_double_cpu() const   { validate_type(); return check_value_mask(kind_mask | size_mask,    cpu_register | double_size);  }
 406 
 407   bool is_fpu_register() const { validate_type(); return check_value_mask(kind_mask,                fpu_register);                }
 408   bool is_virtual_fpu() const  { validate_type(); return check_value_mask(kind_mask | virtual_mask, fpu_register | virtual_mask); }
 409   bool is_fixed_fpu() const    { validate_type(); return check_value_mask(kind_mask | virtual_mask, fpu_register);                }
 410   bool is_single_fpu() const   { validate_type(); return check_value_mask(kind_mask | size_mask,    fpu_register | single_size);  }
 411   bool is_double_fpu() const   { validate_type(); return check_value_mask(kind_mask | size_mask,    fpu_register | double_size);  }
 412 
 413   bool is_xmm_register() const { validate_type(); return check_value_mask(kind_mask | is_xmm_mask,             fpu_register | is_xmm_mask); }
 414   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); }
 415   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); }
 416 
 417   // fast accessor functions for special bits that do not work for pointers
 418   // (in this functions, the check for is_pointer() is omitted)
 419   bool is_single_word() const      { assert(is_register() || is_stack(), "type check"); return check_value_mask(size_mask, single_size); }
 420   bool is_double_word() const      { assert(is_register() || is_stack(), "type check"); return check_value_mask(size_mask, double_size); }
 421   bool is_virtual_register() const { assert(is_register(),               "type check"); return check_value_mask(virtual_mask, virtual_mask); }
 422   bool is_oop_register() const     { assert(is_register() || is_stack(), "type check"); return type_field_valid() == object_type; }
 423   BasicType type_register() const  { assert(is_register() || is_stack(), "type check"); return as_BasicType(type_field_valid());  }
 424 
 425   bool is_last_use() const         { assert(is_register(), "only works for registers"); return (value() & last_use_mask) != 0; }
 426   bool is_fpu_stack_offset() const { assert(is_register(), "only works for registers"); return (value() & is_fpu_stack_offset_mask) != 0; }
 427   LIR_Opr make_last_use()          { assert(is_register(), "only works for registers"); return (LIR_Opr)(value() | last_use_mask); }
 428   LIR_Opr make_fpu_stack_offset()  { assert(is_register(), "only works for registers"); return (LIR_Opr)(value() | is_fpu_stack_offset_mask); }
 429 
 430 
 431   int single_stack_ix() const  { assert(is_single_stack() && !is_virtual(), "type check"); return (int)data(); }
 432   int double_stack_ix() const  { assert(is_double_stack() && !is_virtual(), "type check"); return (int)data(); }
 433   RegNr cpu_regnr() const      { assert(is_single_cpu()   && !is_virtual(), "type check"); return (RegNr)data(); }
 434   RegNr cpu_regnrLo() const    { assert(is_double_cpu()   && !is_virtual(), "type check"); return (RegNr)lo_reg_half(); }
 435   RegNr cpu_regnrHi() const    { assert(is_double_cpu()   && !is_virtual(), "type check"); return (RegNr)hi_reg_half(); }
 436   RegNr fpu_regnr() const      { assert(is_single_fpu()   && !is_virtual(), "type check"); return (RegNr)data(); }
 437   RegNr fpu_regnrLo() const    { assert(is_double_fpu()   && !is_virtual(), "type check"); return (RegNr)lo_reg_half(); }
 438   RegNr fpu_regnrHi() const    { assert(is_double_fpu()   && !is_virtual(), "type check"); return (RegNr)hi_reg_half(); }
 439   RegNr xmm_regnr() const      { assert(is_single_xmm()   && !is_virtual(), "type check"); return (RegNr)data(); }
 440   RegNr xmm_regnrLo() const    { assert(is_double_xmm()   && !is_virtual(), "type check"); return (RegNr)lo_reg_half(); }
 441   RegNr xmm_regnrHi() const    { assert(is_double_xmm()   && !is_virtual(), "type check"); return (RegNr)hi_reg_half(); }
 442   int   vreg_number() const    { assert(is_virtual(),                       "type check"); return (RegNr)data(); }
 443 
 444   LIR_OprPtr* pointer() const { assert(_value != 0 && is_pointer(), "nullness and type check"); return (LIR_OprPtr*)_value; }
 445   LIR_Const* as_constant_ptr() const             { return pointer()->as_constant(); }
 446   LIR_Address* as_address_ptr() const            { return pointer()->as_address(); }
 447 
 448   Register as_register()    const;
 449   Register as_register_lo() const;
 450   Register as_register_hi() const;
 451 
 452   Register as_pointer_register() {
 453 #ifdef _LP64
 454     if (is_double_cpu()) {
 455       assert(as_register_lo() == as_register_hi(), "should be a single register");
 456       return as_register_lo();
 457     }
 458 #endif
 459     return as_register();
 460   }
 461 
 462   FloatRegister as_float_reg   () const;
 463   FloatRegister as_double_reg  () const;
 464 #ifdef X86
 465   XMMRegister as_xmm_float_reg () const;
 466   XMMRegister as_xmm_double_reg() const;
 467   // for compatibility with RInfo
 468   int fpu() const { return lo_reg_half(); }
 469 #endif
 470 
 471   jint      as_jint()    const { return as_constant_ptr()->as_jint(); }
 472   jlong     as_jlong()   const { return as_constant_ptr()->as_jlong(); }
 473   jfloat    as_jfloat()  const { return as_constant_ptr()->as_jfloat(); }
 474   jdouble   as_jdouble() const { return as_constant_ptr()->as_jdouble(); }
 475   jobject   as_jobject() const { return as_constant_ptr()->as_jobject(); }
 476 
 477   void print() const PRODUCT_RETURN;
 478   void print(outputStream* out) const PRODUCT_RETURN;
 479 };
 480 
 481 inline LIR_Opr::OprType as_OprType(BasicType type) {
 482   switch (type) {
 483   case T_INT:      return LIR_Opr::int_type;
 484   case T_LONG:     return LIR_Opr::long_type;
 485   case T_FLOAT:    return LIR_Opr::float_type;
 486   case T_DOUBLE:   return LIR_Opr::double_type;
 487   case T_OBJECT:
 488   case T_ARRAY:    return LIR_Opr::object_type;
 489   case T_ADDRESS:  return LIR_Opr::address_type;
 490   case T_METADATA: return LIR_Opr::metadata_type;
 491   case T_ILLEGAL:  // fall through
 492   default: ShouldNotReachHere(); return LIR_Opr::unknown_type;
 493   }
 494 }
 495 
 496 inline BasicType as_BasicType(LIR_Opr::OprType t) {
 497   switch (t) {
 498   case LIR_Opr::int_type:     return T_INT;
 499   case LIR_Opr::long_type:    return T_LONG;
 500   case LIR_Opr::float_type:   return T_FLOAT;
 501   case LIR_Opr::double_type:  return T_DOUBLE;
 502   case LIR_Opr::object_type:  return T_OBJECT;
 503   case LIR_Opr::address_type: return T_ADDRESS;
 504   case LIR_Opr::metadata_type:return T_METADATA;
 505   case LIR_Opr::unknown_type: // fall through
 506   default: ShouldNotReachHere();  return T_ILLEGAL;
 507   }
 508 }
 509 
 510 
 511 // LIR_Address
 512 class LIR_Address: public LIR_OprPtr {
 513  friend class LIR_OpVisitState;
 514 
 515  public:
 516   // NOTE: currently these must be the log2 of the scale factor (and
 517   // must also be equivalent to the ScaleFactor enum in
 518   // assembler_i486.hpp)
 519   enum Scale {
 520     times_1  =  0,
 521     times_2  =  1,
 522     times_4  =  2,
 523     times_8  =  3
 524   };
 525 
 526  private:
 527   LIR_Opr   _base;
 528   LIR_Opr   _index;
 529   Scale     _scale;
 530   intx      _disp;
 531   BasicType _type;
 532 
 533  public:
 534   LIR_Address(LIR_Opr base, LIR_Opr index, BasicType type):
 535        _base(base)
 536      , _index(index)
 537      , _scale(times_1)
 538      , _disp(0)
 539      , _type(type) { verify(); }
 540 
 541   LIR_Address(LIR_Opr base, intx disp, BasicType type):
 542        _base(base)
 543      , _index(LIR_Opr::illegalOpr())
 544      , _scale(times_1)
 545      , _disp(disp)
 546      , _type(type) { verify(); }
 547 
 548   LIR_Address(LIR_Opr base, BasicType type):
 549        _base(base)
 550      , _index(LIR_Opr::illegalOpr())
 551      , _scale(times_1)
 552      , _disp(0)
 553      , _type(type) { verify(); }
 554 
 555   LIR_Address(LIR_Opr base, LIR_Opr index, intx disp, BasicType type):
 556        _base(base)
 557      , _index(index)
 558      , _scale(times_1)
 559      , _disp(disp)
 560      , _type(type) { verify(); }
 561 
 562   LIR_Address(LIR_Opr base, LIR_Opr index, Scale scale, intx disp, BasicType type):
 563        _base(base)
 564      , _index(index)
 565      , _scale(scale)
 566      , _disp(disp)
 567      , _type(type) { verify(); }
 568 
 569   LIR_Opr base()  const                          { return _base;  }
 570   LIR_Opr index() const                          { return _index; }
 571   Scale   scale() const                          { return _scale; }
 572   intx    disp()  const                          { return _disp;  }
 573 
 574   bool equals(LIR_Address* other) const          { return base() == other->base() && index() == other->index() && disp() == other->disp() && scale() == other->scale(); }
 575 
 576   virtual LIR_Address* as_address()              { return this;   }
 577   virtual BasicType type() const                 { return _type; }
 578   virtual void print_value_on(outputStream* out) const PRODUCT_RETURN;
 579 
 580   void verify() const PRODUCT_RETURN;
 581 
 582   static Scale scale(BasicType type);
 583 };
 584 
 585 
 586 // operand factory
 587 class LIR_OprFact: public AllStatic {
 588  public:
 589 
 590   static LIR_Opr illegalOpr;
 591   static LIR_Opr nullOpr;
 592 
 593   static LIR_Opr single_cpu(int reg) {
 594     return (LIR_Opr)(intptr_t)((reg  << LIR_Opr::reg1_shift) |
 595                                LIR_Opr::int_type             |
 596                                LIR_Opr::cpu_register         |
 597                                LIR_Opr::single_size);
 598   }
 599   static LIR_Opr single_cpu_oop(int reg) {
 600     return (LIR_Opr)(intptr_t)((reg  << LIR_Opr::reg1_shift) |
 601                                LIR_Opr::object_type          |
 602                                LIR_Opr::cpu_register         |
 603                                LIR_Opr::single_size);
 604   }
 605   static LIR_Opr single_cpu_address(int reg) {
 606     return (LIR_Opr)(intptr_t)((reg  << LIR_Opr::reg1_shift) |
 607                                LIR_Opr::address_type         |
 608                                LIR_Opr::cpu_register         |
 609                                LIR_Opr::single_size);
 610   }
 611   static LIR_Opr single_cpu_metadata(int reg) {
 612     return (LIR_Opr)(intptr_t)((reg  << LIR_Opr::reg1_shift) |
 613                                LIR_Opr::metadata_type        |
 614                                LIR_Opr::cpu_register         |
 615                                LIR_Opr::single_size);
 616   }
 617   static LIR_Opr double_cpu(int reg1, int reg2) {
 618     LP64_ONLY(assert(reg1 == reg2, "must be identical"));
 619     return (LIR_Opr)(intptr_t)((reg1 << LIR_Opr::reg1_shift) |
 620                                (reg2 << LIR_Opr::reg2_shift) |
 621                                LIR_Opr::long_type            |
 622                                LIR_Opr::cpu_register         |
 623                                LIR_Opr::double_size);
 624   }
 625 
 626   static LIR_Opr single_fpu(int reg) {
 627     return (LIR_Opr)(intptr_t)((reg  << LIR_Opr::reg1_shift) |
 628                                LIR_Opr::float_type           |
 629                                LIR_Opr::fpu_register         |
 630                                LIR_Opr::single_size);
 631   }
 632 
 633   // Platform dependant.
 634   static LIR_Opr double_fpu(int reg1, int reg2 = -1 /*fnoreg*/);
 635 
 636 #ifdef ARM32
 637   static LIR_Opr single_softfp(int reg) {
 638     return (LIR_Opr)(intptr_t)((reg  << LIR_Opr::reg1_shift) |
 639                                LIR_Opr::float_type           |
 640                                LIR_Opr::cpu_register         |
 641                                LIR_Opr::single_size);
 642   }
 643   static LIR_Opr double_softfp(int reg1, int reg2) {
 644     return (LIR_Opr)(intptr_t)((reg1 << LIR_Opr::reg1_shift) |
 645                                (reg2 << LIR_Opr::reg2_shift) |
 646                                LIR_Opr::double_type          |
 647                                LIR_Opr::cpu_register         |
 648                                LIR_Opr::double_size);
 649   }
 650 #endif // ARM32
 651 
 652 #if defined(X86)
 653   static LIR_Opr single_xmm(int reg) {
 654     return (LIR_Opr)(intptr_t)((reg << LIR_Opr::reg1_shift) |
 655                                LIR_Opr::float_type          |
 656                                LIR_Opr::fpu_register        |
 657                                LIR_Opr::single_size         |
 658                                LIR_Opr::is_xmm_mask);
 659   }
 660   static LIR_Opr double_xmm(int reg) {
 661     return (LIR_Opr)(intptr_t)((reg << LIR_Opr::reg1_shift) |
 662                                (reg << LIR_Opr::reg2_shift) |
 663                                LIR_Opr::double_type         |
 664                                LIR_Opr::fpu_register        |
 665                                LIR_Opr::double_size         |
 666                                LIR_Opr::is_xmm_mask);
 667   }
 668 #endif // X86
 669 
 670   static LIR_Opr virtual_register(int index, BasicType type) {
 671     if (index > LIR_Opr::vreg_max) {
 672       // Running out of virtual registers. Caller should bailout.
 673       return illegalOpr;
 674     }
 675 
 676     LIR_Opr res;
 677     switch (type) {
 678       case T_OBJECT: // fall through
 679       case T_ARRAY:
 680         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift)  |
 681                                             LIR_Opr::object_type  |
 682                                             LIR_Opr::cpu_register |
 683                                             LIR_Opr::single_size  |
 684                                             LIR_Opr::virtual_mask);
 685         break;
 686 
 687       case T_METADATA:
 688         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift)  |
 689                                             LIR_Opr::metadata_type|
 690                                             LIR_Opr::cpu_register |
 691                                             LIR_Opr::single_size  |
 692                                             LIR_Opr::virtual_mask);
 693         break;
 694 
 695       case T_INT:
 696         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 697                                   LIR_Opr::int_type              |
 698                                   LIR_Opr::cpu_register          |
 699                                   LIR_Opr::single_size           |
 700                                   LIR_Opr::virtual_mask);
 701         break;
 702 
 703       case T_ADDRESS:
 704         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 705                                   LIR_Opr::address_type          |
 706                                   LIR_Opr::cpu_register          |
 707                                   LIR_Opr::single_size           |
 708                                   LIR_Opr::virtual_mask);
 709         break;
 710 
 711       case T_LONG:
 712         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 713                                   LIR_Opr::long_type             |
 714                                   LIR_Opr::cpu_register          |
 715                                   LIR_Opr::double_size           |
 716                                   LIR_Opr::virtual_mask);
 717         break;
 718 
 719 #ifdef __SOFTFP__
 720       case T_FLOAT:
 721         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 722                                   LIR_Opr::float_type  |
 723                                   LIR_Opr::cpu_register |
 724                                   LIR_Opr::single_size |
 725                                   LIR_Opr::virtual_mask);
 726         break;
 727       case T_DOUBLE:
 728         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 729                                   LIR_Opr::double_type |
 730                                   LIR_Opr::cpu_register |
 731                                   LIR_Opr::double_size |
 732                                   LIR_Opr::virtual_mask);
 733         break;
 734 #else // __SOFTFP__
 735       case T_FLOAT:
 736         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 737                                   LIR_Opr::float_type           |
 738                                   LIR_Opr::fpu_register         |
 739                                   LIR_Opr::single_size          |
 740                                   LIR_Opr::virtual_mask);
 741         break;
 742 
 743       case
 744         T_DOUBLE: res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 745                                             LIR_Opr::double_type           |
 746                                             LIR_Opr::fpu_register          |
 747                                             LIR_Opr::double_size           |
 748                                             LIR_Opr::virtual_mask);
 749         break;
 750 #endif // __SOFTFP__
 751       default:       ShouldNotReachHere(); res = illegalOpr;
 752     }
 753 
 754 #ifdef ASSERT
 755     res->validate_type();
 756     assert(res->vreg_number() == index, "conversion check");
 757     assert(index >= LIR_Opr::vreg_base, "must start at vreg_base");
 758     assert(index <= (max_jint >> LIR_Opr::data_shift), "index is too big");
 759 
 760     // old-style calculation; check if old and new method are equal
 761     LIR_Opr::OprType t = as_OprType(type);
 762 #ifdef __SOFTFP__
 763     LIR_Opr old_res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 764                                t |
 765                                LIR_Opr::cpu_register |
 766                                LIR_Opr::size_for(type) | LIR_Opr::virtual_mask);
 767 #else // __SOFTFP__
 768     LIR_Opr old_res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) | t |
 769                                           ((type == T_FLOAT || type == T_DOUBLE) ?  LIR_Opr::fpu_register : LIR_Opr::cpu_register) |
 770                                LIR_Opr::size_for(type) | LIR_Opr::virtual_mask);
 771     assert(res == old_res, "old and new method not equal");
 772 #endif // __SOFTFP__
 773 #endif // ASSERT
 774 
 775     return res;
 776   }
 777 
 778   // 'index' is computed by FrameMap::local_stack_pos(index); do not use other parameters as
 779   // the index is platform independent; a double stack useing indeces 2 and 3 has always
 780   // index 2.
 781   static LIR_Opr stack(int index, BasicType type) {
 782     LIR_Opr res;
 783     switch (type) {
 784       case T_OBJECT: // fall through
 785       case T_ARRAY:
 786         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 787                                   LIR_Opr::object_type           |
 788                                   LIR_Opr::stack_value           |
 789                                   LIR_Opr::single_size);
 790         break;
 791 
 792       case T_METADATA:
 793         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 794                                   LIR_Opr::metadata_type         |
 795                                   LIR_Opr::stack_value           |
 796                                   LIR_Opr::single_size);
 797         break;
 798       case T_INT:
 799         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 800                                   LIR_Opr::int_type              |
 801                                   LIR_Opr::stack_value           |
 802                                   LIR_Opr::single_size);
 803         break;
 804 
 805       case T_ADDRESS:
 806         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 807                                   LIR_Opr::address_type          |
 808                                   LIR_Opr::stack_value           |
 809                                   LIR_Opr::single_size);
 810         break;
 811 
 812       case T_LONG:
 813         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 814                                   LIR_Opr::long_type             |
 815                                   LIR_Opr::stack_value           |
 816                                   LIR_Opr::double_size);
 817         break;
 818 
 819       case T_FLOAT:
 820         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 821                                   LIR_Opr::float_type            |
 822                                   LIR_Opr::stack_value           |
 823                                   LIR_Opr::single_size);
 824         break;
 825       case T_DOUBLE:
 826         res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 827                                   LIR_Opr::double_type           |
 828                                   LIR_Opr::stack_value           |
 829                                   LIR_Opr::double_size);
 830         break;
 831 
 832       default:       ShouldNotReachHere(); res = illegalOpr;
 833     }
 834 
 835 #ifdef ASSERT
 836     assert(index >= 0, "index must be positive");
 837     assert(index <= (max_jint >> LIR_Opr::data_shift), "index is too big");
 838 
 839     LIR_Opr old_res = (LIR_Opr)(intptr_t)((index << LIR_Opr::data_shift) |
 840                                           LIR_Opr::stack_value           |
 841                                           as_OprType(type)                   |
 842                                           LIR_Opr::size_for(type));
 843     assert(res == old_res, "old and new method not equal");
 844 #endif
 845 
 846     return res;
 847   }
 848 
 849   static LIR_Opr intConst(jint i)                { return (LIR_Opr)(new LIR_Const(i)); }
 850   static LIR_Opr longConst(jlong l)              { return (LIR_Opr)(new LIR_Const(l)); }
 851   static LIR_Opr floatConst(jfloat f)            { return (LIR_Opr)(new LIR_Const(f)); }
 852   static LIR_Opr doubleConst(jdouble d)          { return (LIR_Opr)(new LIR_Const(d)); }
 853   static LIR_Opr oopConst(jobject o)             { return (LIR_Opr)(new LIR_Const(o)); }
 854   static LIR_Opr address(LIR_Address* a)         { return (LIR_Opr)a; }
 855   static LIR_Opr intptrConst(void* p)            { return (LIR_Opr)(new LIR_Const(p)); }
 856   static LIR_Opr intptrConst(intptr_t v)         { return (LIR_Opr)(new LIR_Const((void*)v)); }
 857   static LIR_Opr illegal()                       { return (LIR_Opr)-1; }
 858   static LIR_Opr addressConst(jint i)            { return (LIR_Opr)(new LIR_Const(i, true)); }
 859   static LIR_Opr metadataConst(Metadata* m)      { return (LIR_Opr)(new LIR_Const(m)); }
 860 
 861   static LIR_Opr value_type(ValueType* type);
 862 };
 863 
 864 
 865 //-------------------------------------------------------------------------------
 866 //                   LIR Instructions
 867 //-------------------------------------------------------------------------------
 868 //
 869 // Note:
 870 //  - every instruction has a result operand
 871 //  - every instruction has an CodeEmitInfo operand (can be revisited later)
 872 //  - every instruction has a LIR_OpCode operand
 873 //  - LIR_OpN, means an instruction that has N input operands
 874 //
 875 // class hierarchy:
 876 //
 877 class  LIR_Op;
 878 class    LIR_Op0;
 879 class      LIR_OpLabel;
 880 class    LIR_Op1;
 881 class      LIR_OpBranch;
 882 class      LIR_OpConvert;
 883 class      LIR_OpAllocObj;
 884 class      LIR_OpReturn;
 885 class      LIR_OpRoundFP;
 886 class    LIR_Op2;
 887 class    LIR_OpDelay;
 888 class    LIR_Op3;
 889 class      LIR_OpAllocArray;
 890 class    LIR_OpCall;
 891 class      LIR_OpJavaCall;
 892 class      LIR_OpRTCall;
 893 class    LIR_OpArrayCopy;
 894 class    LIR_OpUpdateCRC32;
 895 class    LIR_OpLock;
 896 class    LIR_OpTypeCheck;
 897 class    LIR_OpCompareAndSwap;
 898 class    LIR_OpLoadKlass;
 899 class    LIR_OpProfileCall;
 900 class    LIR_OpProfileType;
 901 #ifdef ASSERT
 902 class    LIR_OpAssert;
 903 #endif
 904 
 905 // LIR operation codes
 906 enum LIR_Code {
 907     lir_none
 908   , begin_op0
 909       , lir_label
 910       , lir_nop
 911       , lir_std_entry
 912       , lir_osr_entry
 913       , lir_fpop_raw
 914       , lir_breakpoint
 915       , lir_rtcall
 916       , lir_membar
 917       , lir_membar_acquire
 918       , lir_membar_release
 919       , lir_membar_loadload
 920       , lir_membar_storestore
 921       , lir_membar_loadstore
 922       , lir_membar_storeload
 923       , lir_get_thread
 924       , lir_on_spin_wait
 925   , end_op0
 926   , begin_op1
 927       , lir_fxch
 928       , lir_fld
 929       , lir_push
 930       , lir_pop
 931       , lir_null_check
 932       , lir_return
 933       , lir_leal
 934       , lir_branch
 935       , lir_cond_float_branch
 936       , lir_move
 937       , lir_convert
 938       , lir_alloc_object
 939       , lir_monaddr
 940       , lir_roundfp
 941       , lir_safepoint
 942       , lir_unwind
 943       , lir_load_klass
 944   , end_op1
 945   , begin_op2
 946       , lir_cmp
 947       , lir_cmp_l2i
 948       , lir_ucmp_fd2i
 949       , lir_cmp_fd2i
 950       , lir_cmove
 951       , lir_add
 952       , lir_sub
 953       , lir_mul
 954       , lir_div
 955       , lir_rem
 956       , lir_sqrt
 957       , lir_abs
 958       , lir_neg
 959       , lir_tan
 960       , lir_log10
 961       , lir_logic_and
 962       , lir_logic_or
 963       , lir_logic_xor
 964       , lir_shl
 965       , lir_shr
 966       , lir_ushr
 967       , lir_alloc_array
 968       , lir_throw
 969       , lir_xadd
 970       , lir_xchg
 971   , end_op2
 972   , begin_op3
 973       , lir_idiv
 974       , lir_irem
 975       , lir_fmad
 976       , lir_fmaf
 977   , end_op3
 978   , begin_opJavaCall
 979       , lir_static_call
 980       , lir_optvirtual_call
 981       , lir_icvirtual_call
 982       , lir_dynamic_call
 983   , end_opJavaCall
 984   , begin_opArrayCopy
 985       , lir_arraycopy
 986   , end_opArrayCopy
 987   , begin_opUpdateCRC32
 988       , lir_updatecrc32
 989   , end_opUpdateCRC32
 990   , begin_opLock
 991     , lir_lock
 992     , lir_unlock
 993   , end_opLock
 994   , begin_delay_slot
 995     , lir_delay_slot
 996   , end_delay_slot
 997   , begin_opTypeCheck
 998     , lir_instanceof
 999     , lir_checkcast
1000     , lir_store_check
1001   , end_opTypeCheck
1002   , begin_opCompareAndSwap
1003     , lir_cas_long
1004     , lir_cas_obj
1005     , lir_cas_int
1006   , end_opCompareAndSwap
1007   , begin_opMDOProfile
1008     , lir_profile_call
1009     , lir_profile_type
1010   , end_opMDOProfile
1011   , begin_opAssert
1012     , lir_assert
1013   , end_opAssert
1014 };
1015 
1016 
1017 enum LIR_Condition {
1018     lir_cond_equal
1019   , lir_cond_notEqual
1020   , lir_cond_less
1021   , lir_cond_lessEqual
1022   , lir_cond_greaterEqual
1023   , lir_cond_greater
1024   , lir_cond_belowEqual
1025   , lir_cond_aboveEqual
1026   , lir_cond_always
1027   , lir_cond_unknown = -1
1028 };
1029 
1030 
1031 enum LIR_PatchCode {
1032   lir_patch_none,
1033   lir_patch_low,
1034   lir_patch_high,
1035   lir_patch_normal
1036 };
1037 
1038 
1039 enum LIR_MoveKind {
1040   lir_move_normal,
1041   lir_move_volatile,
1042   lir_move_wide,
1043   lir_move_max_flag
1044 };
1045 
1046 
1047 // --------------------------------------------------
1048 // LIR_Op
1049 // --------------------------------------------------
1050 class LIR_Op: public CompilationResourceObj {
1051  friend class LIR_OpVisitState;
1052 
1053 #ifdef ASSERT
1054  private:
1055   const char *  _file;
1056   int           _line;
1057 #endif
1058 
1059  protected:
1060   LIR_Opr       _result;
1061   unsigned short _code;
1062   unsigned short _flags;
1063   CodeEmitInfo* _info;
1064   int           _id;     // value id for register allocation
1065   int           _fpu_pop_count;
1066   Instruction*  _source; // for debugging
1067 
1068   static void print_condition(outputStream* out, LIR_Condition cond) PRODUCT_RETURN;
1069 
1070  protected:
1071   static bool is_in_range(LIR_Code test, LIR_Code start, LIR_Code end)  { return start < test && test < end; }
1072 
1073  public:
1074   LIR_Op()
1075     :
1076 #ifdef ASSERT
1077       _file(NULL)
1078     , _line(0),
1079 #endif
1080       _result(LIR_OprFact::illegalOpr)
1081     , _code(lir_none)
1082     , _flags(0)
1083     , _info(NULL)
1084     , _id(-1)
1085     , _fpu_pop_count(0)
1086     , _source(NULL) {}
1087 
1088   LIR_Op(LIR_Code code, LIR_Opr result, CodeEmitInfo* info)
1089     :
1090 #ifdef ASSERT
1091       _file(NULL)
1092     , _line(0),
1093 #endif
1094       _result(result)
1095     , _code(code)
1096     , _flags(0)
1097     , _info(info)
1098     , _id(-1)
1099     , _fpu_pop_count(0)
1100     , _source(NULL) {}
1101 
1102   CodeEmitInfo* info() const                  { return _info;   }
1103   LIR_Code code()      const                  { return (LIR_Code)_code;   }
1104   LIR_Opr result_opr() const                  { return _result; }
1105   void    set_result_opr(LIR_Opr opr)         { _result = opr;  }
1106 
1107 #ifdef ASSERT
1108   void set_file_and_line(const char * file, int line) {
1109     _file = file;
1110     _line = line;
1111   }
1112 #endif
1113 
1114   virtual const char * name() const PRODUCT_RETURN0;
1115   virtual void visit(LIR_OpVisitState* state);
1116 
1117   int id()             const                  { return _id;     }
1118   void set_id(int id)                         { _id = id; }
1119 
1120   // FPU stack simulation helpers -- only used on Intel
1121   void set_fpu_pop_count(int count)           { assert(count >= 0 && count <= 1, "currently only 0 and 1 are valid"); _fpu_pop_count = count; }
1122   int  fpu_pop_count() const                  { return _fpu_pop_count; }
1123   bool pop_fpu_stack()                        { return _fpu_pop_count > 0; }
1124 
1125   Instruction* source() const                 { return _source; }
1126   void set_source(Instruction* ins)           { _source = ins; }
1127 
1128   virtual void emit_code(LIR_Assembler* masm) = 0;
1129   virtual void print_instr(outputStream* out) const   = 0;
1130   virtual void print_on(outputStream* st) const PRODUCT_RETURN;
1131 
1132   virtual bool is_patching() { return false; }
1133   virtual LIR_OpCall* as_OpCall() { return NULL; }
1134   virtual LIR_OpJavaCall* as_OpJavaCall() { return NULL; }
1135   virtual LIR_OpLabel* as_OpLabel() { return NULL; }
1136   virtual LIR_OpDelay* as_OpDelay() { return NULL; }
1137   virtual LIR_OpLock* as_OpLock() { return NULL; }
1138   virtual LIR_OpAllocArray* as_OpAllocArray() { return NULL; }
1139   virtual LIR_OpAllocObj* as_OpAllocObj() { return NULL; }
1140   virtual LIR_OpRoundFP* as_OpRoundFP() { return NULL; }
1141   virtual LIR_OpBranch* as_OpBranch() { return NULL; }
1142   virtual LIR_OpReturn* as_OpReturn() { return NULL; }
1143   virtual LIR_OpRTCall* as_OpRTCall() { return NULL; }
1144   virtual LIR_OpConvert* as_OpConvert() { return NULL; }
1145   virtual LIR_Op0* as_Op0() { return NULL; }
1146   virtual LIR_Op1* as_Op1() { return NULL; }
1147   virtual LIR_Op2* as_Op2() { return NULL; }
1148   virtual LIR_Op3* as_Op3() { return NULL; }
1149   virtual LIR_OpArrayCopy* as_OpArrayCopy() { return NULL; }
1150   virtual LIR_OpUpdateCRC32* as_OpUpdateCRC32() { return NULL; }
1151   virtual LIR_OpTypeCheck* as_OpTypeCheck() { return NULL; }
1152   virtual LIR_OpCompareAndSwap* as_OpCompareAndSwap() { return NULL; }
1153   virtual LIR_OpLoadKlass* as_OpLoadKlass() { return NULL; }
1154   virtual LIR_OpProfileCall* as_OpProfileCall() { return NULL; }
1155   virtual LIR_OpProfileType* as_OpProfileType() { return NULL; }
1156 #ifdef ASSERT
1157   virtual LIR_OpAssert* as_OpAssert() { return NULL; }
1158 #endif
1159 
1160   virtual void verify() const {}
1161 };
1162 
1163 // for calls
1164 class LIR_OpCall: public LIR_Op {
1165  friend class LIR_OpVisitState;
1166 
1167  protected:
1168   address      _addr;
1169   LIR_OprList* _arguments;
1170  protected:
1171   LIR_OpCall(LIR_Code code, address addr, LIR_Opr result,
1172              LIR_OprList* arguments, CodeEmitInfo* info = NULL)
1173     : LIR_Op(code, result, info)
1174     , _addr(addr)
1175     , _arguments(arguments) {}
1176 
1177  public:
1178   address addr() const                           { return _addr; }
1179   const LIR_OprList* arguments() const           { return _arguments; }
1180   virtual LIR_OpCall* as_OpCall()                { return this; }
1181 };
1182 
1183 
1184 // --------------------------------------------------
1185 // LIR_OpJavaCall
1186 // --------------------------------------------------
1187 class LIR_OpJavaCall: public LIR_OpCall {
1188  friend class LIR_OpVisitState;
1189 
1190  private:
1191   ciMethod* _method;
1192   LIR_Opr   _receiver;
1193   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.
1194 
1195  public:
1196   LIR_OpJavaCall(LIR_Code code, ciMethod* method,
1197                  LIR_Opr receiver, LIR_Opr result,
1198                  address addr, LIR_OprList* arguments,
1199                  CodeEmitInfo* info)
1200   : LIR_OpCall(code, addr, result, arguments, info)
1201   , _method(method)
1202   , _receiver(receiver)
1203   , _method_handle_invoke_SP_save_opr(LIR_OprFact::illegalOpr)
1204   { assert(is_in_range(code, begin_opJavaCall, end_opJavaCall), "code check"); }
1205 
1206   LIR_OpJavaCall(LIR_Code code, ciMethod* method,
1207                  LIR_Opr receiver, LIR_Opr result, intptr_t vtable_offset,
1208                  LIR_OprList* arguments, CodeEmitInfo* info)
1209   : LIR_OpCall(code, (address)vtable_offset, result, arguments, info)
1210   , _method(method)
1211   , _receiver(receiver)
1212   , _method_handle_invoke_SP_save_opr(LIR_OprFact::illegalOpr)
1213   { assert(is_in_range(code, begin_opJavaCall, end_opJavaCall), "code check"); }
1214 
1215   LIR_Opr receiver() const                       { return _receiver; }
1216   ciMethod* method() const                       { return _method;   }
1217 
1218   // JSR 292 support.
1219   bool is_invokedynamic() const                  { return code() == lir_dynamic_call; }
1220   bool is_method_handle_invoke() const {
1221     return method()->is_compiled_lambda_form() ||   // Java-generated lambda form
1222            method()->is_method_handle_intrinsic();  // JVM-generated MH intrinsic
1223   }
1224 
1225   virtual void emit_code(LIR_Assembler* masm);
1226   virtual LIR_OpJavaCall* as_OpJavaCall() { return this; }
1227   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1228 };
1229 
1230 // --------------------------------------------------
1231 // LIR_OpLabel
1232 // --------------------------------------------------
1233 // Location where a branch can continue
1234 class LIR_OpLabel: public LIR_Op {
1235  friend class LIR_OpVisitState;
1236 
1237  private:
1238   Label* _label;
1239  public:
1240   LIR_OpLabel(Label* lbl)
1241    : LIR_Op(lir_label, LIR_OprFact::illegalOpr, NULL)
1242    , _label(lbl)                                 {}
1243   Label* label() const                           { return _label; }
1244 
1245   virtual void emit_code(LIR_Assembler* masm);
1246   virtual LIR_OpLabel* as_OpLabel() { return this; }
1247   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1248 };
1249 
1250 // LIR_OpArrayCopy
1251 class LIR_OpArrayCopy: public LIR_Op {
1252  friend class LIR_OpVisitState;
1253 
1254  private:
1255   ArrayCopyStub*  _stub;
1256   LIR_Opr   _src;
1257   LIR_Opr   _src_pos;
1258   LIR_Opr   _dst;
1259   LIR_Opr   _dst_pos;
1260   LIR_Opr   _length;
1261   LIR_Opr   _tmp;
1262   ciArrayKlass* _expected_type;
1263   int       _flags;
1264 
1265 public:
1266   enum Flags {
1267     src_null_check         = 1 << 0,
1268     dst_null_check         = 1 << 1,
1269     src_pos_positive_check = 1 << 2,
1270     dst_pos_positive_check = 1 << 3,
1271     length_positive_check  = 1 << 4,
1272     src_range_check        = 1 << 5,
1273     dst_range_check        = 1 << 6,
1274     type_check             = 1 << 7,
1275     overlapping            = 1 << 8,
1276     unaligned              = 1 << 9,
1277     src_objarray           = 1 << 10,
1278     dst_objarray           = 1 << 11,
1279     all_flags              = (1 << 12) - 1
1280   };
1281 
1282   LIR_OpArrayCopy(LIR_Opr src, LIR_Opr src_pos, LIR_Opr dst, LIR_Opr dst_pos, LIR_Opr length, LIR_Opr tmp,
1283                   ciArrayKlass* expected_type, int flags, CodeEmitInfo* info);
1284 
1285   LIR_Opr src() const                            { return _src; }
1286   LIR_Opr src_pos() const                        { return _src_pos; }
1287   LIR_Opr dst() const                            { return _dst; }
1288   LIR_Opr dst_pos() const                        { return _dst_pos; }
1289   LIR_Opr length() const                         { return _length; }
1290   LIR_Opr tmp() const                            { return _tmp; }
1291   int flags() const                              { return _flags; }
1292   ciArrayKlass* expected_type() const            { return _expected_type; }
1293   ArrayCopyStub* stub() const                    { return _stub; }
1294 
1295   virtual void emit_code(LIR_Assembler* masm);
1296   virtual LIR_OpArrayCopy* as_OpArrayCopy() { return this; }
1297   void print_instr(outputStream* out) const PRODUCT_RETURN;
1298 };
1299 
1300 // LIR_OpUpdateCRC32
1301 class LIR_OpUpdateCRC32: public LIR_Op {
1302   friend class LIR_OpVisitState;
1303 
1304 private:
1305   LIR_Opr   _crc;
1306   LIR_Opr   _val;
1307 
1308 public:
1309 
1310   LIR_OpUpdateCRC32(LIR_Opr crc, LIR_Opr val, LIR_Opr res);
1311 
1312   LIR_Opr crc() const                            { return _crc; }
1313   LIR_Opr val() const                            { return _val; }
1314 
1315   virtual void emit_code(LIR_Assembler* masm);
1316   virtual LIR_OpUpdateCRC32* as_OpUpdateCRC32()  { return this; }
1317   void print_instr(outputStream* out) const PRODUCT_RETURN;
1318 };
1319 
1320 // --------------------------------------------------
1321 // LIR_Op0
1322 // --------------------------------------------------
1323 class LIR_Op0: public LIR_Op {
1324  friend class LIR_OpVisitState;
1325 
1326  public:
1327   LIR_Op0(LIR_Code code)
1328    : LIR_Op(code, LIR_OprFact::illegalOpr, NULL)  { assert(is_in_range(code, begin_op0, end_op0), "code check"); }
1329   LIR_Op0(LIR_Code code, LIR_Opr result, CodeEmitInfo* info = NULL)
1330    : LIR_Op(code, result, info)  { assert(is_in_range(code, begin_op0, end_op0), "code check"); }
1331 
1332   virtual void emit_code(LIR_Assembler* masm);
1333   virtual LIR_Op0* as_Op0() { return this; }
1334   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1335 };
1336 
1337 
1338 // --------------------------------------------------
1339 // LIR_Op1
1340 // --------------------------------------------------
1341 
1342 class LIR_Op1: public LIR_Op {
1343  friend class LIR_OpVisitState;
1344 
1345  protected:
1346   LIR_Opr         _opr;   // input operand
1347   BasicType       _type;  // Operand types
1348   LIR_PatchCode   _patch; // only required with patchin (NEEDS_CLEANUP: do we want a special instruction for patching?)
1349 
1350   static void print_patch_code(outputStream* out, LIR_PatchCode code);
1351 
1352   void set_kind(LIR_MoveKind kind) {
1353     assert(code() == lir_move, "must be");
1354     _flags = kind;
1355   }
1356 
1357  public:
1358   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)
1359     : LIR_Op(code, result, info)
1360     , _opr(opr)
1361     , _type(type)
1362     , _patch(patch)                    { assert(is_in_range(code, begin_op1, end_op1), "code check"); }
1363 
1364   LIR_Op1(LIR_Code code, LIR_Opr opr, LIR_Opr result, BasicType type, LIR_PatchCode patch, CodeEmitInfo* info, LIR_MoveKind kind)
1365     : LIR_Op(code, result, info)
1366     , _opr(opr)
1367     , _type(type)
1368     , _patch(patch)                    {
1369     assert(code == lir_move, "must be");
1370     set_kind(kind);
1371   }
1372 
1373   LIR_Op1(LIR_Code code, LIR_Opr opr, CodeEmitInfo* info)
1374     : LIR_Op(code, LIR_OprFact::illegalOpr, info)
1375     , _opr(opr)
1376     , _type(T_ILLEGAL)
1377     , _patch(lir_patch_none)           { assert(is_in_range(code, begin_op1, end_op1), "code check"); }
1378 
1379   LIR_Opr in_opr()           const               { return _opr;   }
1380   LIR_PatchCode patch_code() const               { return _patch; }
1381   BasicType type()           const               { return _type;  }
1382 
1383   LIR_MoveKind move_kind() const {
1384     assert(code() == lir_move, "must be");
1385     return (LIR_MoveKind)_flags;
1386   }
1387 
1388   virtual bool is_patching() { return _patch != lir_patch_none; }
1389   virtual void emit_code(LIR_Assembler* masm);
1390   virtual LIR_Op1* as_Op1() { return this; }
1391   virtual const char * name() const PRODUCT_RETURN0;
1392 
1393   void set_in_opr(LIR_Opr opr) { _opr = opr; }
1394 
1395   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1396   virtual void verify() const;
1397 };
1398 
1399 
1400 // for runtime calls
1401 class LIR_OpRTCall: public LIR_OpCall {
1402  friend class LIR_OpVisitState;
1403 
1404  private:
1405   LIR_Opr _tmp;
1406  public:
1407   LIR_OpRTCall(address addr, LIR_Opr tmp,
1408                LIR_Opr result, LIR_OprList* arguments, CodeEmitInfo* info = NULL)
1409     : LIR_OpCall(lir_rtcall, addr, result, arguments, info)
1410     , _tmp(tmp) {}
1411 
1412   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1413   virtual void emit_code(LIR_Assembler* masm);
1414   virtual LIR_OpRTCall* as_OpRTCall() { return this; }
1415 
1416   LIR_Opr tmp() const                            { return _tmp; }
1417 
1418   virtual void verify() const;
1419 };
1420 
1421 
1422 class LIR_OpBranch: public LIR_Op {
1423  friend class LIR_OpVisitState;
1424 
1425  private:
1426   LIR_Condition _cond;
1427   Label*        _label;
1428   BlockBegin*   _block;  // if this is a branch to a block, this is the block
1429   BlockBegin*   _ublock; // if this is a float-branch, this is the unorderd block
1430   CodeStub*     _stub;   // if this is a branch to a stub, this is the stub
1431 
1432  public:
1433   LIR_OpBranch(LIR_Condition cond, Label* lbl)
1434     : LIR_Op(lir_branch, LIR_OprFact::illegalOpr, (CodeEmitInfo*) NULL)
1435     , _cond(cond)
1436     , _label(lbl)
1437     , _block(NULL)
1438     , _ublock(NULL)
1439     , _stub(NULL) { }
1440 
1441   LIR_OpBranch(LIR_Condition cond, BlockBegin* block);
1442   LIR_OpBranch(LIR_Condition cond, CodeStub* stub);
1443 
1444   // for unordered comparisons
1445   LIR_OpBranch(LIR_Condition cond, BlockBegin* block, BlockBegin* ublock);
1446 
1447   LIR_Condition cond()        const              { return _cond;        }
1448   Label*        label()       const              { return _label;       }
1449   BlockBegin*   block()       const              { return _block;       }
1450   BlockBegin*   ublock()      const              { return _ublock;      }
1451   CodeStub*     stub()        const              { return _stub;       }
1452 
1453   void          change_block(BlockBegin* b);
1454   void          change_ublock(BlockBegin* b);
1455   void          negate_cond();
1456 
1457   virtual void emit_code(LIR_Assembler* masm);
1458   virtual LIR_OpBranch* as_OpBranch() { return this; }
1459   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1460 };
1461 
1462 class LIR_OpReturn: public LIR_Op1 {
1463  friend class LIR_OpVisitState;
1464 
1465  private:
1466   C1SafepointPollStub* _stub;
1467 
1468  public:
1469   LIR_OpReturn(LIR_Opr opr);
1470 
1471   C1SafepointPollStub* stub() const { return _stub; }
1472   virtual LIR_OpReturn* as_OpReturn() { return this; }
1473 };
1474 
1475 class ConversionStub;
1476 
1477 class LIR_OpConvert: public LIR_Op1 {
1478  friend class LIR_OpVisitState;
1479 
1480  private:
1481    Bytecodes::Code _bytecode;
1482    ConversionStub* _stub;
1483 
1484  public:
1485    LIR_OpConvert(Bytecodes::Code code, LIR_Opr opr, LIR_Opr result, ConversionStub* stub)
1486      : LIR_Op1(lir_convert, opr, result)
1487      , _bytecode(code)
1488      , _stub(stub)                               {}
1489 
1490   Bytecodes::Code bytecode() const               { return _bytecode; }
1491   ConversionStub* stub() const                   { return _stub; }
1492 
1493   virtual void emit_code(LIR_Assembler* masm);
1494   virtual LIR_OpConvert* as_OpConvert() { return this; }
1495   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1496 
1497   static void print_bytecode(outputStream* out, Bytecodes::Code code) PRODUCT_RETURN;
1498 };
1499 
1500 
1501 // LIR_OpAllocObj
1502 class LIR_OpAllocObj : public LIR_Op1 {
1503  friend class LIR_OpVisitState;
1504 
1505  private:
1506   LIR_Opr _tmp1;
1507   LIR_Opr _tmp2;
1508   LIR_Opr _tmp3;
1509   LIR_Opr _tmp4;
1510   int     _hdr_size;
1511   int     _obj_size;
1512   CodeStub* _stub;
1513   bool    _init_check;
1514 
1515  public:
1516   LIR_OpAllocObj(LIR_Opr klass, LIR_Opr result,
1517                  LIR_Opr t1, LIR_Opr t2, LIR_Opr t3, LIR_Opr t4,
1518                  int hdr_size, int obj_size, bool init_check, CodeStub* stub)
1519     : LIR_Op1(lir_alloc_object, klass, result)
1520     , _tmp1(t1)
1521     , _tmp2(t2)
1522     , _tmp3(t3)
1523     , _tmp4(t4)
1524     , _hdr_size(hdr_size)
1525     , _obj_size(obj_size)
1526     , _stub(stub)
1527     , _init_check(init_check)                    { }
1528 
1529   LIR_Opr klass()        const                   { return in_opr();     }
1530   LIR_Opr obj()          const                   { return result_opr(); }
1531   LIR_Opr tmp1()         const                   { return _tmp1;        }
1532   LIR_Opr tmp2()         const                   { return _tmp2;        }
1533   LIR_Opr tmp3()         const                   { return _tmp3;        }
1534   LIR_Opr tmp4()         const                   { return _tmp4;        }
1535   int     header_size()  const                   { return _hdr_size;    }
1536   int     object_size()  const                   { return _obj_size;    }
1537   bool    init_check()   const                   { return _init_check;  }
1538   CodeStub* stub()       const                   { return _stub;        }
1539 
1540   virtual void emit_code(LIR_Assembler* masm);
1541   virtual LIR_OpAllocObj * as_OpAllocObj () { return this; }
1542   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1543 };
1544 
1545 
1546 // LIR_OpRoundFP
1547 class LIR_OpRoundFP : public LIR_Op1 {
1548  friend class LIR_OpVisitState;
1549 
1550  private:
1551   LIR_Opr _tmp;
1552 
1553  public:
1554   LIR_OpRoundFP(LIR_Opr reg, LIR_Opr stack_loc_temp, LIR_Opr result)
1555     : LIR_Op1(lir_roundfp, reg, result)
1556     , _tmp(stack_loc_temp) {}
1557 
1558   LIR_Opr tmp() const                            { return _tmp; }
1559   virtual LIR_OpRoundFP* as_OpRoundFP()          { return this; }
1560   void print_instr(outputStream* out) const PRODUCT_RETURN;
1561 };
1562 
1563 // LIR_OpTypeCheck
1564 class LIR_OpTypeCheck: public LIR_Op {
1565  friend class LIR_OpVisitState;
1566 
1567  private:
1568   LIR_Opr       _object;
1569   LIR_Opr       _array;
1570   ciKlass*      _klass;
1571   LIR_Opr       _tmp1;
1572   LIR_Opr       _tmp2;
1573   LIR_Opr       _tmp3;
1574   bool          _fast_check;
1575   CodeEmitInfo* _info_for_patch;
1576   CodeEmitInfo* _info_for_exception;
1577   CodeStub*     _stub;
1578   ciMethod*     _profiled_method;
1579   int           _profiled_bci;
1580   bool          _should_profile;
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);
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 
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_Op2
1615 class LIR_Op2: public LIR_Op {
1616  friend class LIR_OpVisitState;
1617 
1618   int  _fpu_stack_size; // for sin/cos implementation on Intel
1619 
1620  protected:
1621   LIR_Opr   _opr1;
1622   LIR_Opr   _opr2;
1623   BasicType _type;
1624   LIR_Opr   _tmp1;
1625   LIR_Opr   _tmp2;
1626   LIR_Opr   _tmp3;
1627   LIR_Opr   _tmp4;
1628   LIR_Opr   _tmp5;
1629   LIR_Condition _condition;
1630 
1631   void verify() const;
1632 
1633  public:
1634   LIR_Op2(LIR_Code code, LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, CodeEmitInfo* info = NULL)
1635     : LIR_Op(code, LIR_OprFact::illegalOpr, info)
1636     , _fpu_stack_size(0)
1637     , _opr1(opr1)
1638     , _opr2(opr2)
1639     , _type(T_ILLEGAL)
1640     , _tmp1(LIR_OprFact::illegalOpr)
1641     , _tmp2(LIR_OprFact::illegalOpr)
1642     , _tmp3(LIR_OprFact::illegalOpr)
1643     , _tmp4(LIR_OprFact::illegalOpr)
1644     , _tmp5(LIR_OprFact::illegalOpr)
1645     , _condition(condition) {
1646     assert(code == lir_cmp || code == lir_assert, "code check");
1647   }
1648 
1649   LIR_Op2(LIR_Code code, LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type)
1650     : LIR_Op(code, result, NULL)
1651     , _fpu_stack_size(0)
1652     , _opr1(opr1)
1653     , _opr2(opr2)
1654     , _type(type)
1655     , _tmp1(LIR_OprFact::illegalOpr)
1656     , _tmp2(LIR_OprFact::illegalOpr)
1657     , _tmp3(LIR_OprFact::illegalOpr)
1658     , _tmp4(LIR_OprFact::illegalOpr)
1659     , _tmp5(LIR_OprFact::illegalOpr)
1660     , _condition(condition) {
1661     assert(code == lir_cmove, "code check");
1662     assert(type != T_ILLEGAL, "cmove should have type");
1663   }
1664 
1665   LIR_Op2(LIR_Code code, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result = LIR_OprFact::illegalOpr,
1666           CodeEmitInfo* info = NULL, BasicType type = T_ILLEGAL)
1667     : LIR_Op(code, result, info)
1668     , _fpu_stack_size(0)
1669     , _opr1(opr1)
1670     , _opr2(opr2)
1671     , _type(type)
1672     , _tmp1(LIR_OprFact::illegalOpr)
1673     , _tmp2(LIR_OprFact::illegalOpr)
1674     , _tmp3(LIR_OprFact::illegalOpr)
1675     , _tmp4(LIR_OprFact::illegalOpr)
1676     , _tmp5(LIR_OprFact::illegalOpr)
1677     , _condition(lir_cond_unknown) {
1678     assert(code != lir_cmp && is_in_range(code, begin_op2, end_op2), "code check");
1679   }
1680 
1681   LIR_Op2(LIR_Code code, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, LIR_Opr tmp1, LIR_Opr tmp2 = LIR_OprFact::illegalOpr,
1682           LIR_Opr tmp3 = LIR_OprFact::illegalOpr, LIR_Opr tmp4 = LIR_OprFact::illegalOpr, LIR_Opr tmp5 = LIR_OprFact::illegalOpr)
1683     : LIR_Op(code, result, NULL)
1684     , _fpu_stack_size(0)
1685     , _opr1(opr1)
1686     , _opr2(opr2)
1687     , _type(T_ILLEGAL)
1688     , _tmp1(tmp1)
1689     , _tmp2(tmp2)
1690     , _tmp3(tmp3)
1691     , _tmp4(tmp4)
1692     , _tmp5(tmp5)
1693     , _condition(lir_cond_unknown) {
1694     assert(code != lir_cmp && is_in_range(code, begin_op2, end_op2), "code check");
1695   }
1696 
1697   LIR_Opr in_opr1() const                        { return _opr1; }
1698   LIR_Opr in_opr2() const                        { return _opr2; }
1699   BasicType type()  const                        { return _type; }
1700   LIR_Opr tmp1_opr() const                       { return _tmp1; }
1701   LIR_Opr tmp2_opr() const                       { return _tmp2; }
1702   LIR_Opr tmp3_opr() const                       { return _tmp3; }
1703   LIR_Opr tmp4_opr() const                       { return _tmp4; }
1704   LIR_Opr tmp5_opr() const                       { return _tmp5; }
1705   LIR_Condition condition() const  {
1706     assert(code() == lir_cmp || code() == lir_cmove || code() == lir_assert, "only valid for cmp and cmove and assert"); return _condition;
1707   }
1708   void set_condition(LIR_Condition condition) {
1709     assert(code() == lir_cmp || code() == lir_cmove, "only valid for cmp and cmove");  _condition = condition;
1710   }
1711 
1712   void set_fpu_stack_size(int size)              { _fpu_stack_size = size; }
1713   int  fpu_stack_size() const                    { return _fpu_stack_size; }
1714 
1715   void set_in_opr1(LIR_Opr opr)                  { _opr1 = opr; }
1716   void set_in_opr2(LIR_Opr opr)                  { _opr2 = opr; }
1717 
1718   virtual void emit_code(LIR_Assembler* masm);
1719   virtual LIR_Op2* as_Op2() { return this; }
1720   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1721 };
1722 
1723 class LIR_OpAllocArray : public LIR_Op {
1724  friend class LIR_OpVisitState;
1725 
1726  private:
1727   LIR_Opr   _klass;
1728   LIR_Opr   _len;
1729   LIR_Opr   _tmp1;
1730   LIR_Opr   _tmp2;
1731   LIR_Opr   _tmp3;
1732   LIR_Opr   _tmp4;
1733   BasicType _type;
1734   CodeStub* _stub;
1735 
1736  public:
1737   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)
1738     : LIR_Op(lir_alloc_array, result, NULL)
1739     , _klass(klass)
1740     , _len(len)
1741     , _tmp1(t1)
1742     , _tmp2(t2)
1743     , _tmp3(t3)
1744     , _tmp4(t4)
1745     , _type(type)
1746     , _stub(stub) {}
1747 
1748   LIR_Opr   klass()   const                      { return _klass;       }
1749   LIR_Opr   len()     const                      { return _len;         }
1750   LIR_Opr   obj()     const                      { return result_opr(); }
1751   LIR_Opr   tmp1()    const                      { return _tmp1;        }
1752   LIR_Opr   tmp2()    const                      { return _tmp2;        }
1753   LIR_Opr   tmp3()    const                      { return _tmp3;        }
1754   LIR_Opr   tmp4()    const                      { return _tmp4;        }
1755   BasicType type()    const                      { return _type;        }
1756   CodeStub* stub()    const                      { return _stub;        }
1757 
1758   virtual void emit_code(LIR_Assembler* masm);
1759   virtual LIR_OpAllocArray * as_OpAllocArray () { return this; }
1760   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1761 };
1762 
1763 
1764 class LIR_Op3: public LIR_Op {
1765  friend class LIR_OpVisitState;
1766 
1767  private:
1768   LIR_Opr _opr1;
1769   LIR_Opr _opr2;
1770   LIR_Opr _opr3;
1771  public:
1772   LIR_Op3(LIR_Code code, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr opr3, LIR_Opr result, CodeEmitInfo* info = NULL)
1773     : LIR_Op(code, result, info)
1774     , _opr1(opr1)
1775     , _opr2(opr2)
1776     , _opr3(opr3)                                { assert(is_in_range(code, begin_op3, end_op3), "code check"); }
1777   LIR_Opr in_opr1() const                        { return _opr1; }
1778   LIR_Opr in_opr2() const                        { return _opr2; }
1779   LIR_Opr in_opr3() const                        { return _opr3; }
1780 
1781   virtual void emit_code(LIR_Assembler* masm);
1782   virtual LIR_Op3* as_Op3() { return this; }
1783   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1784 };
1785 
1786 
1787 //--------------------------------
1788 class LabelObj: public CompilationResourceObj {
1789  private:
1790   Label _label;
1791  public:
1792   LabelObj()                                     {}
1793   Label* label()                                 { return &_label; }
1794 };
1795 
1796 
1797 class LIR_OpLock: public LIR_Op {
1798  friend class LIR_OpVisitState;
1799 
1800  private:
1801   LIR_Opr _hdr;
1802   LIR_Opr _obj;
1803   LIR_Opr _lock;
1804   LIR_Opr _scratch;
1805   CodeStub* _stub;
1806  public:
1807   LIR_OpLock(LIR_Code code, LIR_Opr hdr, LIR_Opr obj, LIR_Opr lock, LIR_Opr scratch, CodeStub* stub, CodeEmitInfo* info)
1808     : LIR_Op(code, LIR_OprFact::illegalOpr, info)
1809     , _hdr(hdr)
1810     , _obj(obj)
1811     , _lock(lock)
1812     , _scratch(scratch)
1813     , _stub(stub)                      {}
1814 
1815   LIR_Opr hdr_opr() const                        { return _hdr; }
1816   LIR_Opr obj_opr() const                        { return _obj; }
1817   LIR_Opr lock_opr() const                       { return _lock; }
1818   LIR_Opr scratch_opr() const                    { return _scratch; }
1819   CodeStub* stub() const                         { return _stub; }
1820 
1821   virtual void emit_code(LIR_Assembler* masm);
1822   virtual LIR_OpLock* as_OpLock() { return this; }
1823   void print_instr(outputStream* out) const PRODUCT_RETURN;
1824 };
1825 
1826 class LIR_OpLoadKlass: public LIR_Op {
1827   friend class LIR_OpVisitState;
1828 
1829  private:
1830   LIR_Opr _obj;
1831   CodeStub* _stub;
1832  public:
1833   LIR_OpLoadKlass(LIR_Opr obj, LIR_Opr result, CodeEmitInfo* info, CodeStub* stub)
1834     : LIR_Op(lir_load_klass, result, info)
1835     , _obj(obj)
1836     , _stub(stub) {}
1837 
1838   LIR_Opr obj()        const { return _obj;  }
1839   CodeStub* stub()     const { return _stub; }
1840 
1841   virtual LIR_OpLoadKlass* as_OpLoadKlass() { return this; }
1842   virtual void emit_code(LIR_Assembler* masm);
1843   void print_instr(outputStream* out) const PRODUCT_RETURN;
1844 };
1845 
1846 class LIR_OpDelay: public LIR_Op {
1847  friend class LIR_OpVisitState;
1848 
1849  private:
1850   LIR_Op* _op;
1851 
1852  public:
1853   LIR_OpDelay(LIR_Op* op, CodeEmitInfo* info):
1854     LIR_Op(lir_delay_slot, LIR_OprFact::illegalOpr, info),
1855     _op(op) {
1856     assert(op->code() == lir_nop, "should be filling with nops");
1857   }
1858   virtual void emit_code(LIR_Assembler* masm);
1859   virtual LIR_OpDelay* as_OpDelay() { return this; }
1860   void print_instr(outputStream* out) const PRODUCT_RETURN;
1861   LIR_Op* delay_op() const { return _op; }
1862   CodeEmitInfo* call_info() const { return info(); }
1863 };
1864 
1865 #ifdef ASSERT
1866 // LIR_OpAssert
1867 class LIR_OpAssert : public LIR_Op2 {
1868  friend class LIR_OpVisitState;
1869 
1870  private:
1871   const char* _msg;
1872   bool        _halt;
1873 
1874  public:
1875   LIR_OpAssert(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, const char* msg, bool halt)
1876     : LIR_Op2(lir_assert, condition, opr1, opr2)
1877     , _msg(msg)
1878     , _halt(halt) {
1879   }
1880 
1881   const char* msg() const                        { return _msg; }
1882   bool        halt() const                       { return _halt; }
1883 
1884   virtual void emit_code(LIR_Assembler* masm);
1885   virtual LIR_OpAssert* as_OpAssert()            { return this; }
1886   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1887 };
1888 #endif
1889 
1890 // LIR_OpCompareAndSwap
1891 class LIR_OpCompareAndSwap : public LIR_Op {
1892  friend class LIR_OpVisitState;
1893 
1894  private:
1895   LIR_Opr _addr;
1896   LIR_Opr _cmp_value;
1897   LIR_Opr _new_value;
1898   LIR_Opr _tmp1;
1899   LIR_Opr _tmp2;
1900 
1901  public:
1902   LIR_OpCompareAndSwap(LIR_Code code, LIR_Opr addr, LIR_Opr cmp_value, LIR_Opr new_value,
1903                        LIR_Opr t1, LIR_Opr t2, LIR_Opr result)
1904     : LIR_Op(code, result, NULL)  // no result, no info
1905     , _addr(addr)
1906     , _cmp_value(cmp_value)
1907     , _new_value(new_value)
1908     , _tmp1(t1)
1909     , _tmp2(t2)                                  { }
1910 
1911   LIR_Opr addr()        const                    { return _addr;  }
1912   LIR_Opr cmp_value()   const                    { return _cmp_value; }
1913   LIR_Opr new_value()   const                    { return _new_value; }
1914   LIR_Opr tmp1()        const                    { return _tmp1;      }
1915   LIR_Opr tmp2()        const                    { return _tmp2;      }
1916 
1917   virtual void emit_code(LIR_Assembler* masm);
1918   virtual LIR_OpCompareAndSwap * as_OpCompareAndSwap () { return this; }
1919   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1920 };
1921 
1922 // LIR_OpProfileCall
1923 class LIR_OpProfileCall : public LIR_Op {
1924  friend class LIR_OpVisitState;
1925 
1926  private:
1927   ciMethod* _profiled_method;
1928   int       _profiled_bci;
1929   ciMethod* _profiled_callee;
1930   LIR_Opr   _mdo;
1931   LIR_Opr   _recv;
1932   LIR_Opr   _tmp1;
1933   ciKlass*  _known_holder;
1934 
1935  public:
1936   // Destroys recv
1937   LIR_OpProfileCall(ciMethod* profiled_method, int profiled_bci, ciMethod* profiled_callee, LIR_Opr mdo, LIR_Opr recv, LIR_Opr t1, ciKlass* known_holder)
1938     : LIR_Op(lir_profile_call, LIR_OprFact::illegalOpr, NULL)  // no result, no info
1939     , _profiled_method(profiled_method)
1940     , _profiled_bci(profiled_bci)
1941     , _profiled_callee(profiled_callee)
1942     , _mdo(mdo)
1943     , _recv(recv)
1944     , _tmp1(t1)
1945     , _known_holder(known_holder)                { }
1946 
1947   ciMethod* profiled_method() const              { return _profiled_method;  }
1948   int       profiled_bci()    const              { return _profiled_bci;     }
1949   ciMethod* profiled_callee() const              { return _profiled_callee;  }
1950   LIR_Opr   mdo()             const              { return _mdo;              }
1951   LIR_Opr   recv()            const              { return _recv;             }
1952   LIR_Opr   tmp1()            const              { return _tmp1;             }
1953   ciKlass*  known_holder()    const              { return _known_holder;     }
1954 
1955   virtual void emit_code(LIR_Assembler* masm);
1956   virtual LIR_OpProfileCall* as_OpProfileCall() { return this; }
1957   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
1958   bool should_profile_receiver_type() const {
1959     bool callee_is_static = _profiled_callee->is_loaded() && _profiled_callee->is_static();
1960     Bytecodes::Code bc = _profiled_method->java_code_at_bci(_profiled_bci);
1961     bool call_is_virtual = (bc == Bytecodes::_invokevirtual && !_profiled_callee->can_be_statically_bound()) || bc == Bytecodes::_invokeinterface;
1962     return C1ProfileVirtualCalls && call_is_virtual && !callee_is_static;
1963   }
1964 };
1965 
1966 // LIR_OpProfileType
1967 class LIR_OpProfileType : public LIR_Op {
1968  friend class LIR_OpVisitState;
1969 
1970  private:
1971   LIR_Opr      _mdp;
1972   LIR_Opr      _obj;
1973   LIR_Opr      _tmp;
1974   ciKlass*     _exact_klass;   // non NULL if we know the klass statically (no need to load it from _obj)
1975   intptr_t     _current_klass; // what the profiling currently reports
1976   bool         _not_null;      // true if we know statically that _obj cannot be null
1977   bool         _no_conflict;   // true if we're profling parameters, _exact_klass is not NULL and we know
1978                                // _exact_klass it the only possible type for this parameter in any context.
1979 
1980  public:
1981   // Destroys recv
1982   LIR_OpProfileType(LIR_Opr mdp, LIR_Opr obj, ciKlass* exact_klass, intptr_t current_klass, LIR_Opr tmp, bool not_null, bool no_conflict)
1983     : LIR_Op(lir_profile_type, LIR_OprFact::illegalOpr, NULL)  // no result, no info
1984     , _mdp(mdp)
1985     , _obj(obj)
1986     , _tmp(tmp)
1987     , _exact_klass(exact_klass)
1988     , _current_klass(current_klass)
1989     , _not_null(not_null)
1990     , _no_conflict(no_conflict) { }
1991 
1992   LIR_Opr      mdp()              const             { return _mdp;              }
1993   LIR_Opr      obj()              const             { return _obj;              }
1994   LIR_Opr      tmp()              const             { return _tmp;              }
1995   ciKlass*     exact_klass()      const             { return _exact_klass;      }
1996   intptr_t     current_klass()    const             { return _current_klass;    }
1997   bool         not_null()         const             { return _not_null;         }
1998   bool         no_conflict()      const             { return _no_conflict;      }
1999 
2000   virtual void emit_code(LIR_Assembler* masm);
2001   virtual LIR_OpProfileType* as_OpProfileType() { return this; }
2002   virtual void print_instr(outputStream* out) const PRODUCT_RETURN;
2003 };
2004 
2005 class LIR_InsertionBuffer;
2006 
2007 //--------------------------------LIR_List---------------------------------------------------
2008 // Maintains a list of LIR instructions (one instance of LIR_List per basic block)
2009 // The LIR instructions are appended by the LIR_List class itself;
2010 //
2011 // Notes:
2012 // - all offsets are(should be) in bytes
2013 // - local positions are specified with an offset, with offset 0 being local 0
2014 
2015 class LIR_List: public CompilationResourceObj {
2016  private:
2017   LIR_OpList  _operations;
2018 
2019   Compilation*  _compilation;
2020 #ifndef PRODUCT
2021   BlockBegin*   _block;
2022 #endif
2023 #ifdef ASSERT
2024   const char *  _file;
2025   int           _line;
2026 #endif
2027 
2028  public:
2029   void append(LIR_Op* op) {
2030     if (op->source() == NULL)
2031       op->set_source(_compilation->current_instruction());
2032 #ifndef PRODUCT
2033     if (PrintIRWithLIR) {
2034       _compilation->maybe_print_current_instruction();
2035       op->print(); tty->cr();
2036     }
2037 #endif // PRODUCT
2038 
2039     _operations.append(op);
2040 
2041 #ifdef ASSERT
2042     op->verify();
2043     op->set_file_and_line(_file, _line);
2044     _file = NULL;
2045     _line = 0;
2046 #endif
2047   }
2048 
2049   LIR_List(Compilation* compilation, BlockBegin* block = NULL);
2050 
2051 #ifdef ASSERT
2052   void set_file_and_line(const char * file, int line);
2053 #endif
2054 
2055   //---------- accessors ---------------
2056   LIR_OpList* instructions_list()                { return &_operations; }
2057   int         length() const                     { return _operations.length(); }
2058   LIR_Op*     at(int i) const                    { return _operations.at(i); }
2059 
2060   NOT_PRODUCT(BlockBegin* block() const          { return _block; });
2061 
2062   // insert LIR_Ops in buffer to right places in LIR_List
2063   void append(LIR_InsertionBuffer* buffer);
2064 
2065   //---------- mutators ---------------
2066   void insert_before(int i, LIR_List* op_list)   { _operations.insert_before(i, op_list->instructions_list()); }
2067   void insert_before(int i, LIR_Op* op)          { _operations.insert_before(i, op); }
2068   void remove_at(int i)                          { _operations.remove_at(i); }
2069 
2070   //---------- printing -------------
2071   void print_instructions() PRODUCT_RETURN;
2072 
2073 
2074   //---------- instructions -------------
2075   void call_opt_virtual(ciMethod* method, LIR_Opr receiver, LIR_Opr result,
2076                         address dest, LIR_OprList* arguments,
2077                         CodeEmitInfo* info) {
2078     append(new LIR_OpJavaCall(lir_optvirtual_call, method, receiver, result, dest, arguments, info));
2079   }
2080   void call_static(ciMethod* method, LIR_Opr result,
2081                    address dest, LIR_OprList* arguments, CodeEmitInfo* info) {
2082     append(new LIR_OpJavaCall(lir_static_call, method, LIR_OprFact::illegalOpr, result, dest, arguments, info));
2083   }
2084   void call_icvirtual(ciMethod* method, LIR_Opr receiver, LIR_Opr result,
2085                       address dest, LIR_OprList* arguments, CodeEmitInfo* info) {
2086     append(new LIR_OpJavaCall(lir_icvirtual_call, method, receiver, result, dest, arguments, info));
2087   }
2088   void call_dynamic(ciMethod* method, LIR_Opr receiver, LIR_Opr result,
2089                     address dest, LIR_OprList* arguments, CodeEmitInfo* info) {
2090     append(new LIR_OpJavaCall(lir_dynamic_call, method, receiver, result, dest, arguments, info));
2091   }
2092 
2093   void get_thread(LIR_Opr result)                { append(new LIR_Op0(lir_get_thread, result)); }
2094   void membar()                                  { append(new LIR_Op0(lir_membar)); }
2095   void membar_acquire()                          { append(new LIR_Op0(lir_membar_acquire)); }
2096   void membar_release()                          { append(new LIR_Op0(lir_membar_release)); }
2097   void membar_loadload()                         { append(new LIR_Op0(lir_membar_loadload)); }
2098   void membar_storestore()                       { append(new LIR_Op0(lir_membar_storestore)); }
2099   void membar_loadstore()                        { append(new LIR_Op0(lir_membar_loadstore)); }
2100   void membar_storeload()                        { append(new LIR_Op0(lir_membar_storeload)); }
2101 
2102   void nop()                                     { append(new LIR_Op0(lir_nop)); }
2103 
2104   void std_entry(LIR_Opr receiver)               { append(new LIR_Op0(lir_std_entry, receiver)); }
2105   void osr_entry(LIR_Opr osrPointer)             { append(new LIR_Op0(lir_osr_entry, osrPointer)); }
2106 
2107   void on_spin_wait()                            { append(new LIR_Op0(lir_on_spin_wait)); }
2108 
2109   void branch_destination(Label* lbl)            { append(new LIR_OpLabel(lbl)); }
2110 
2111   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)); }
2112 
2113   // result is a stack location for old backend and vreg for UseLinearScan
2114   // stack_loc_temp is an illegal register for old backend
2115   void roundfp(LIR_Opr reg, LIR_Opr stack_loc_temp, LIR_Opr result) { append(new LIR_OpRoundFP(reg, stack_loc_temp, result)); }
2116   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)); }
2117   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)); }
2118   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)); }
2119   void move_wide(LIR_Address* src, LIR_Opr dst, CodeEmitInfo* info = NULL) {
2120     if (UseCompressedOops) {
2121       append(new LIR_Op1(lir_move, LIR_OprFact::address(src), dst, src->type(), lir_patch_none, info, lir_move_wide));
2122     } else {
2123       move(src, dst, info);
2124     }
2125   }
2126   void move_wide(LIR_Opr src, LIR_Address* dst, CodeEmitInfo* info = NULL) {
2127     if (UseCompressedOops) {
2128       append(new LIR_Op1(lir_move, src, LIR_OprFact::address(dst), dst->type(), lir_patch_none, info, lir_move_wide));
2129     } else {
2130       move(src, dst, info);
2131     }
2132   }
2133   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)); }
2134 
2135   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));   }
2136   void oop2reg_patch(jobject o, LIR_Opr reg, CodeEmitInfo* info);
2137 
2138   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));   }
2139   void klass2reg_patch(Metadata* o, LIR_Opr reg, CodeEmitInfo* info);
2140 
2141   void safepoint(LIR_Opr tmp, CodeEmitInfo* info)  { append(new LIR_Op1(lir_safepoint, tmp, info)); }
2142   void return_op(LIR_Opr result)                   { append(new LIR_OpReturn(result)); }
2143 
2144   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)); }
2145 
2146   void logical_and (LIR_Opr left, LIR_Opr right, LIR_Opr dst) { append(new LIR_Op2(lir_logic_and,  left, right, dst)); }
2147   void logical_or  (LIR_Opr left, LIR_Opr right, LIR_Opr dst) { append(new LIR_Op2(lir_logic_or,   left, right, dst)); }
2148   void logical_xor (LIR_Opr left, LIR_Opr right, LIR_Opr dst) { append(new LIR_Op2(lir_logic_xor,  left, right, dst)); }
2149 
2150   void null_check(LIR_Opr opr, CodeEmitInfo* info, bool deoptimize_on_null = false);
2151   void throw_exception(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) {
2152     append(new LIR_Op2(lir_throw, exceptionPC, exceptionOop, LIR_OprFact::illegalOpr, info));
2153   }
2154   void unwind_exception(LIR_Opr exceptionOop) {
2155     append(new LIR_Op1(lir_unwind, exceptionOop));
2156   }
2157 
2158   void push(LIR_Opr opr)                                   { append(new LIR_Op1(lir_push, opr)); }
2159   void pop(LIR_Opr reg)                                    { append(new LIR_Op1(lir_pop,  reg)); }
2160 
2161   void cmp(LIR_Condition condition, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info = NULL) {
2162     append(new LIR_Op2(lir_cmp, condition, left, right, info));
2163   }
2164   void cmp(LIR_Condition condition, LIR_Opr left, int right, CodeEmitInfo* info = NULL) {
2165     cmp(condition, left, LIR_OprFact::intConst(right), info);
2166   }
2167 
2168   void cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info);
2169   void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Address* addr, CodeEmitInfo* info);
2170 
2171   void cmove(LIR_Condition condition, LIR_Opr src1, LIR_Opr src2, LIR_Opr dst, BasicType type) {
2172     append(new LIR_Op2(lir_cmove, condition, src1, src2, dst, type));
2173   }
2174 
2175   void cas_long(LIR_Opr addr, LIR_Opr cmp_value, LIR_Opr new_value,
2176                 LIR_Opr t1, LIR_Opr t2, LIR_Opr result = LIR_OprFact::illegalOpr);
2177   void cas_obj(LIR_Opr addr, LIR_Opr cmp_value, LIR_Opr new_value,
2178                LIR_Opr t1, LIR_Opr t2, LIR_Opr result = LIR_OprFact::illegalOpr);
2179   void cas_int(LIR_Opr addr, LIR_Opr cmp_value, LIR_Opr new_value,
2180                LIR_Opr t1, LIR_Opr t2, LIR_Opr result = LIR_OprFact::illegalOpr);
2181 
2182   void abs (LIR_Opr from, LIR_Opr to, LIR_Opr tmp)                { append(new LIR_Op2(lir_abs , from, tmp, to)); }
2183   void negate(LIR_Opr from, LIR_Opr to, LIR_Opr tmp = LIR_OprFact::illegalOpr)              { append(new LIR_Op2(lir_neg, from, tmp, to)); }
2184   void sqrt(LIR_Opr from, LIR_Opr to, LIR_Opr tmp)                { append(new LIR_Op2(lir_sqrt, from, tmp, to)); }
2185   void fmad(LIR_Opr from, LIR_Opr from1, LIR_Opr from2, LIR_Opr to) { append(new LIR_Op3(lir_fmad, from, from1, from2, to)); }
2186   void fmaf(LIR_Opr from, LIR_Opr from1, LIR_Opr from2, LIR_Opr to) { append(new LIR_Op3(lir_fmaf, from, from1, from2, to)); }
2187   void log10 (LIR_Opr from, LIR_Opr to, LIR_Opr tmp)              { append(new LIR_Op2(lir_log10, from, LIR_OprFact::illegalOpr, to, tmp)); }
2188   void tan (LIR_Opr from, LIR_Opr to, LIR_Opr tmp1, LIR_Opr tmp2) { append(new LIR_Op2(lir_tan , from, tmp1, to, tmp2)); }
2189 
2190   void add (LIR_Opr left, LIR_Opr right, LIR_Opr res)      { append(new LIR_Op2(lir_add, left, right, res)); }
2191   void sub (LIR_Opr left, LIR_Opr right, LIR_Opr res, CodeEmitInfo* info = NULL) { append(new LIR_Op2(lir_sub, left, right, res, info)); }
2192   void mul (LIR_Opr left, LIR_Opr right, LIR_Opr res) { append(new LIR_Op2(lir_mul, left, right, res)); }
2193   void mul (LIR_Opr left, LIR_Opr right, LIR_Opr res, LIR_Opr tmp) { append(new LIR_Op2(lir_mul, left, right, res, tmp)); }
2194   void div (LIR_Opr left, LIR_Opr right, LIR_Opr res, CodeEmitInfo* info = NULL)      { append(new LIR_Op2(lir_div, left, right, res, info)); }
2195   void div (LIR_Opr left, LIR_Opr right, LIR_Opr res, LIR_Opr tmp) { append(new LIR_Op2(lir_div, left, right, res, tmp)); }
2196   void rem (LIR_Opr left, LIR_Opr right, LIR_Opr res, CodeEmitInfo* info = NULL)      { append(new LIR_Op2(lir_rem, left, right, res, info)); }
2197 
2198   void volatile_load_mem_reg(LIR_Address* address, LIR_Opr dst, CodeEmitInfo* info, LIR_PatchCode patch_code = lir_patch_none);
2199   void volatile_load_unsafe_reg(LIR_Opr base, LIR_Opr offset, LIR_Opr dst, BasicType type, CodeEmitInfo* info, LIR_PatchCode patch_code);
2200 
2201   void load(LIR_Address* addr, LIR_Opr src, CodeEmitInfo* info = NULL, LIR_PatchCode patch_code = lir_patch_none);
2202 
2203   void store_mem_int(jint v,    LIR_Opr base, int offset_in_bytes, BasicType type, CodeEmitInfo* info, LIR_PatchCode patch_code = lir_patch_none);
2204   void store_mem_oop(jobject o, LIR_Opr base, int offset_in_bytes, BasicType type, CodeEmitInfo* info, LIR_PatchCode patch_code = lir_patch_none);
2205   void store(LIR_Opr src, LIR_Address* addr, CodeEmitInfo* info = NULL, LIR_PatchCode patch_code = lir_patch_none);
2206   void volatile_store_mem_reg(LIR_Opr src, LIR_Address* address, CodeEmitInfo* info, LIR_PatchCode patch_code = lir_patch_none);
2207   void volatile_store_unsafe_reg(LIR_Opr src, LIR_Opr base, LIR_Opr offset, BasicType type, CodeEmitInfo* info, LIR_PatchCode patch_code);
2208 
2209   void idiv(LIR_Opr left, LIR_Opr right, LIR_Opr res, LIR_Opr tmp, CodeEmitInfo* info);
2210   void idiv(LIR_Opr left, int   right, LIR_Opr res, LIR_Opr tmp, CodeEmitInfo* info);
2211   void irem(LIR_Opr left, LIR_Opr right, LIR_Opr res, LIR_Opr tmp, CodeEmitInfo* info);
2212   void irem(LIR_Opr left, int   right, LIR_Opr res, LIR_Opr tmp, CodeEmitInfo* info);
2213 
2214   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);
2215   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);
2216 
2217   // jump is an unconditional branch
2218   void jump(BlockBegin* block) {
2219     append(new LIR_OpBranch(lir_cond_always, block));
2220   }
2221   void jump(CodeStub* stub) {
2222     append(new LIR_OpBranch(lir_cond_always, stub));
2223   }
2224   void branch(LIR_Condition cond, Label* lbl) {
2225     append(new LIR_OpBranch(cond, lbl));
2226   }
2227   // Should not be used for fp comparisons
2228   void branch(LIR_Condition cond, BlockBegin* block) {
2229     append(new LIR_OpBranch(cond, block));
2230   }
2231   // Should not be used for fp comparisons
2232   void branch(LIR_Condition cond, CodeStub* stub) {
2233     append(new LIR_OpBranch(cond, stub));
2234   }
2235   // Should only be used for fp comparisons
2236   void branch(LIR_Condition cond, BlockBegin* block, BlockBegin* unordered) {
2237     append(new LIR_OpBranch(cond, block, unordered));
2238   }
2239 
2240   void shift_left(LIR_Opr value, LIR_Opr count, LIR_Opr dst, LIR_Opr tmp);
2241   void shift_right(LIR_Opr value, LIR_Opr count, LIR_Opr dst, LIR_Opr tmp);
2242   void unsigned_shift_right(LIR_Opr value, LIR_Opr count, LIR_Opr dst, LIR_Opr tmp);
2243 
2244   void shift_left(LIR_Opr value, int count, LIR_Opr dst)       { shift_left(value, LIR_OprFact::intConst(count), dst, LIR_OprFact::illegalOpr); }
2245   void shift_right(LIR_Opr value, int count, LIR_Opr dst)      { shift_right(value, LIR_OprFact::intConst(count), dst, LIR_OprFact::illegalOpr); }
2246   void unsigned_shift_right(LIR_Opr value, int count, LIR_Opr dst) { unsigned_shift_right(value, LIR_OprFact::intConst(count), dst, LIR_OprFact::illegalOpr); }
2247 
2248   void lcmp2int(LIR_Opr left, LIR_Opr right, LIR_Opr dst)        { append(new LIR_Op2(lir_cmp_l2i,  left, right, dst)); }
2249   void fcmp2int(LIR_Opr left, LIR_Opr right, LIR_Opr dst, bool is_unordered_less);
2250 
2251   void call_runtime_leaf(address routine, LIR_Opr tmp, LIR_Opr result, LIR_OprList* arguments) {
2252     append(new LIR_OpRTCall(routine, tmp, result, arguments));
2253   }
2254 
2255   void call_runtime(address routine, LIR_Opr tmp, LIR_Opr result,
2256                     LIR_OprList* arguments, CodeEmitInfo* info) {
2257     append(new LIR_OpRTCall(routine, tmp, result, arguments, info));
2258   }
2259 
2260   void load_stack_address_monitor(int monitor_ix, LIR_Opr dst)  { append(new LIR_Op1(lir_monaddr, LIR_OprFact::intConst(monitor_ix), dst)); }
2261   void unlock_object(LIR_Opr hdr, LIR_Opr obj, LIR_Opr lock, LIR_Opr scratch, CodeStub* stub);
2262   void lock_object(LIR_Opr hdr, LIR_Opr obj, LIR_Opr lock, LIR_Opr scratch, CodeStub* stub, CodeEmitInfo* info);
2263 
2264   void breakpoint()                                                  { append(new LIR_Op0(lir_breakpoint)); }
2265 
2266   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)); }
2267 
2268   void update_crc32(LIR_Opr crc, LIR_Opr val, LIR_Opr res)  { append(new LIR_OpUpdateCRC32(crc, val, res)); }
2269 
2270   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);
2271   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);
2272 
2273   void checkcast (LIR_Opr result, LIR_Opr object, ciKlass* klass,
2274                   LIR_Opr tmp1, LIR_Opr tmp2, LIR_Opr tmp3, bool fast_check,
2275                   CodeEmitInfo* info_for_exception, CodeEmitInfo* info_for_patch, CodeStub* stub,
2276                   ciMethod* profiled_method, int profiled_bci);
2277   // MethodData* profiling
2278   void profile_call(ciMethod* method, int bci, ciMethod* callee, LIR_Opr mdo, LIR_Opr recv, LIR_Opr t1, ciKlass* cha_klass) {
2279     append(new LIR_OpProfileCall(method, bci, callee, mdo, recv, t1, cha_klass));
2280   }
2281   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) {
2282     append(new LIR_OpProfileType(LIR_OprFact::address(mdp), obj, exact_klass, current_klass, tmp, not_null, no_conflict));
2283   }
2284 
2285   void xadd(LIR_Opr src, LIR_Opr add, LIR_Opr res, LIR_Opr tmp) { append(new LIR_Op2(lir_xadd, src, add, res, tmp)); }
2286   void xchg(LIR_Opr src, LIR_Opr set, LIR_Opr res, LIR_Opr tmp) { append(new LIR_Op2(lir_xchg, src, set, res, tmp)); }
2287 
2288   void load_klass(LIR_Opr obj, LIR_Opr result, CodeEmitInfo* info, CodeStub* stub) { append(new LIR_OpLoadKlass(obj, result, info, stub)); }
2289 
2290 #ifdef ASSERT
2291   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)); }
2292 #endif
2293 };
2294 
2295 void print_LIR(BlockList* blocks);
2296 
2297 class LIR_InsertionBuffer : public CompilationResourceObj {
2298  private:
2299   LIR_List*   _lir;   // the lir list where ops of this buffer should be inserted later (NULL when uninitialized)
2300 
2301   // list of insertion points. index and count are stored alternately:
2302   // _index_and_count[i * 2]:     the index into lir list where "count" ops should be inserted
2303   // _index_and_count[i * 2 + 1]: the number of ops to be inserted at index
2304   intStack    _index_and_count;
2305 
2306   // the LIR_Ops to be inserted
2307   LIR_OpList  _ops;
2308 
2309   void append_new(int index, int count)  { _index_and_count.append(index); _index_and_count.append(count); }
2310   void set_index_at(int i, int value)    { _index_and_count.at_put((i << 1),     value); }
2311   void set_count_at(int i, int value)    { _index_and_count.at_put((i << 1) + 1, value); }
2312 
2313 #ifdef ASSERT
2314   void verify();
2315 #endif
2316  public:
2317   LIR_InsertionBuffer() : _lir(NULL), _index_and_count(8), _ops(8) { }
2318 
2319   // must be called before using the insertion buffer
2320   void init(LIR_List* lir)  { assert(!initialized(), "already initialized"); _lir = lir; _index_and_count.clear(); _ops.clear(); }
2321   bool initialized() const  { return _lir != NULL; }
2322   // called automatically when the buffer is appended to the LIR_List
2323   void finish()             { _lir = NULL; }
2324 
2325   // accessors
2326   LIR_List*  lir_list() const             { return _lir; }
2327   int number_of_insertion_points() const  { return _index_and_count.length() >> 1; }
2328   int index_at(int i) const               { return _index_and_count.at((i << 1));     }
2329   int count_at(int i) const               { return _index_and_count.at((i << 1) + 1); }
2330 
2331   int number_of_ops() const               { return _ops.length(); }
2332   LIR_Op* op_at(int i) const              { return _ops.at(i); }
2333 
2334   // append an instruction to the buffer
2335   void append(int index, LIR_Op* op);
2336 
2337   // instruction
2338   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)); }
2339 };
2340 
2341 
2342 //
2343 // LIR_OpVisitState is used for manipulating LIR_Ops in an abstract way.
2344 // Calling a LIR_Op's visit function with a LIR_OpVisitState causes
2345 // information about the input, output and temporaries used by the
2346 // op to be recorded.  It also records whether the op has call semantics
2347 // and also records all the CodeEmitInfos used by this op.
2348 //
2349 
2350 
2351 class LIR_OpVisitState: public StackObj {
2352  public:
2353   typedef enum { inputMode, firstMode = inputMode, tempMode, outputMode, numModes, invalidMode = -1 } OprMode;
2354 
2355   enum {
2356     maxNumberOfOperands = 20,
2357     maxNumberOfInfos = 4
2358   };
2359 
2360  private:
2361   LIR_Op*          _op;
2362 
2363   // optimization: the operands and infos are not stored in a variable-length
2364   //               list, but in a fixed-size array to save time of size checks and resizing
2365   int              _oprs_len[numModes];
2366   LIR_Opr*         _oprs_new[numModes][maxNumberOfOperands];
2367   int _info_len;
2368   CodeEmitInfo*    _info_new[maxNumberOfInfos];
2369 
2370   bool             _has_call;
2371   bool             _has_slow_case;
2372 
2373 
2374   // only include register operands
2375   // addresses are decomposed to the base and index registers
2376   // constants and stack operands are ignored
2377   void append(LIR_Opr& opr, OprMode mode) {
2378     assert(opr->is_valid(), "should not call this otherwise");
2379     assert(mode >= 0 && mode < numModes, "bad mode");
2380 
2381     if (opr->is_register()) {
2382        assert(_oprs_len[mode] < maxNumberOfOperands, "array overflow");
2383       _oprs_new[mode][_oprs_len[mode]++] = &opr;
2384 
2385     } else if (opr->is_pointer()) {
2386       LIR_Address* address = opr->as_address_ptr();
2387       if (address != NULL) {
2388         // special handling for addresses: add base and index register of the address
2389         // both are always input operands or temp if we want to extend
2390         // their liveness!
2391         if (mode == outputMode) {
2392           mode = inputMode;
2393         }
2394         assert (mode == inputMode || mode == tempMode, "input or temp only for addresses");
2395         if (address->_base->is_valid()) {
2396           assert(address->_base->is_register(), "must be");
2397           assert(_oprs_len[mode] < maxNumberOfOperands, "array overflow");
2398           _oprs_new[mode][_oprs_len[mode]++] = &address->_base;
2399         }
2400         if (address->_index->is_valid()) {
2401           assert(address->_index->is_register(), "must be");
2402           assert(_oprs_len[mode] < maxNumberOfOperands, "array overflow");
2403           _oprs_new[mode][_oprs_len[mode]++] = &address->_index;
2404         }
2405 
2406       } else {
2407         assert(opr->is_constant(), "constant operands are not processed");
2408       }
2409     } else {
2410       assert(opr->is_stack(), "stack operands are not processed");
2411     }
2412   }
2413 
2414   void append(CodeEmitInfo* info) {
2415     assert(info != NULL, "should not call this otherwise");
2416     assert(_info_len < maxNumberOfInfos, "array overflow");
2417     _info_new[_info_len++] = info;
2418   }
2419 
2420  public:
2421   LIR_OpVisitState()         { reset(); }
2422 
2423   LIR_Op* op() const         { return _op; }
2424   void set_op(LIR_Op* op)    { reset(); _op = op; }
2425 
2426   bool has_call() const      { return _has_call; }
2427   bool has_slow_case() const { return _has_slow_case; }
2428 
2429   void reset() {
2430     _op = NULL;
2431     _has_call = false;
2432     _has_slow_case = false;
2433 
2434     _oprs_len[inputMode] = 0;
2435     _oprs_len[tempMode] = 0;
2436     _oprs_len[outputMode] = 0;
2437     _info_len = 0;
2438   }
2439 
2440 
2441   int opr_count(OprMode mode) const {
2442     assert(mode >= 0 && mode < numModes, "bad mode");
2443     return _oprs_len[mode];
2444   }
2445 
2446   LIR_Opr opr_at(OprMode mode, int index) const {
2447     assert(mode >= 0 && mode < numModes, "bad mode");
2448     assert(index >= 0 && index < _oprs_len[mode], "index out of bound");
2449     return *_oprs_new[mode][index];
2450   }
2451 
2452   void set_opr_at(OprMode mode, int index, LIR_Opr opr) const {
2453     assert(mode >= 0 && mode < numModes, "bad mode");
2454     assert(index >= 0 && index < _oprs_len[mode], "index out of bound");
2455     *_oprs_new[mode][index] = opr;
2456   }
2457 
2458   int info_count() const {
2459     return _info_len;
2460   }
2461 
2462   CodeEmitInfo* info_at(int index) const {
2463     assert(index < _info_len, "index out of bounds");
2464     return _info_new[index];
2465   }
2466 
2467   XHandlers* all_xhandler();
2468 
2469   // collects all register operands of the instruction
2470   void visit(LIR_Op* op);
2471 
2472 #ifdef ASSERT
2473   // check that an operation has no operands
2474   bool no_operands(LIR_Op* op);
2475 #endif
2476 
2477   // LIR_Op visitor functions use these to fill in the state
2478   void do_input(LIR_Opr& opr)             { append(opr, LIR_OpVisitState::inputMode); }
2479   void do_output(LIR_Opr& opr)            { append(opr, LIR_OpVisitState::outputMode); }
2480   void do_temp(LIR_Opr& opr)              { append(opr, LIR_OpVisitState::tempMode); }
2481   void do_info(CodeEmitInfo* info)        { append(info); }
2482 
2483   void do_stub(CodeStub* stub);
2484   void do_call()                          { _has_call = true; }
2485   void do_slow_case()                     { _has_slow_case = true; }
2486   void do_slow_case(CodeEmitInfo* info) {
2487     _has_slow_case = true;
2488     append(info);
2489   }
2490 };
2491 
2492 
2493 inline LIR_Opr LIR_Opr::illegalOpr()   { return LIR_OprFact::illegalOpr; };
2494 
2495 inline LIR_Opr LIR_Opr::nullOpr()   { return LIR_OprFact::nullOpr; };
2496 
2497 #endif // SHARE_C1_C1_LIR_HPP