jdk8-mips64-public/hotspot: src/share/vm/opto/compile.hpp@04ff2f6cd0eb (annotated)

src/share/vm/opto/compile.hpp@04ff2f6cd0eb (annotated)

src/share/vm/opto/compile.hpp

Tue, 17 Oct 2017 12:58:25 +0800

author: aoqi
date: Tue, 17 Oct 2017 12:58:25 +0800
changeset 7994: 04ff2f6cd0eb
parent 7792: 99edc344d77c
parent 7535: 7ae4e26cb1e0
child 8604: 04d83ba48607
permissions: -rw-r--r--

merge

 /*
  * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_OPTO_COMPILE_HPP
 #define SHARE_VM_OPTO_COMPILE_HPP
 #include "asm/codeBuffer.hpp"
 #include "ci/compilerInterface.hpp"
 #include "code/debugInfoRec.hpp"
 #include "code/exceptionHandlerTable.hpp"
 #include "compiler/compilerOracle.hpp"
 #include "compiler/compileBroker.hpp"
 #include "libadt/dict.hpp"
 #include "libadt/port.hpp"
 #include "libadt/vectset.hpp"
 #include "memory/resourceArea.hpp"
 #include "opto/idealGraphPrinter.hpp"
 #include "opto/phasetype.hpp"
 #include "opto/phase.hpp"
 #include "opto/regmask.hpp"
 #include "runtime/deoptimization.hpp"
 #include "runtime/vmThread.hpp"
 #include "trace/tracing.hpp"
 #include "utilities/ticks.hpp"
 class Block;
 class Bundle;
 class C2Compiler;
 class CallGenerator;
 class ConnectionGraph;
 class InlineTree;
 class Int_Array;
 class Matcher;
 class MachConstantNode;
 class MachConstantBaseNode;
 class MachNode;
 class MachOper;
 class MachSafePointNode;
 class Node;
 class Node_Array;
 class Node_Notes;
 class OptoReg;
 class PhaseCFG;
 class PhaseGVN;
 class PhaseIterGVN;
 class PhaseRegAlloc;
 class PhaseCCP;
 class PhaseCCP_DCE;
 class RootNode;
 class relocInfo;
 class Scope;
 class StartNode;
 class SafePointNode;
 class JVMState;
 class Type;
 class TypeData;
 class TypePtr;
 class TypeOopPtr;
 class TypeFunc;
 class Unique_Node_List;
 class nmethod;
 class WarmCallInfo;
 class Node_Stack;
 struct Final_Reshape_Counts;
 //------------------------------Compile----------------------------------------
 // This class defines a top-level Compiler invocation.
 class Compile : public Phase {
   friend class VMStructs;
  public:
   // Fixed alias indexes.  (See also MergeMemNode.)
   enum {
     AliasIdxTop = 1,  // pseudo-index, aliases to nothing (used as sentinel value)
     AliasIdxBot = 2,  // pseudo-index, aliases to everything
     AliasIdxRaw = 3   // hard-wired index for TypeRawPtr::BOTTOM
   };
   // Variant of TraceTime(NULL, &_t_accumulator, TimeCompiler);
   // Integrated with logging.  If logging is turned on, and dolog is true,
   // then brackets are put into the log, with time stamps and node counts.
   // (The time collection itself is always conditionalized on TimeCompiler.)
   class TracePhase : public TraceTime {
    private:
     Compile*    C;
     CompileLog* _log;
     const char* _phase_name;
     bool _dolog;
    public:
     TracePhase(const char* name, elapsedTimer* accumulator, bool dolog);
     ~TracePhase();
   };
   // Information per category of alias (memory slice)
   class AliasType {
    private:
     friend class Compile;
     int             _index;         // unique index, used with MergeMemNode
     const TypePtr*  _adr_type;      // normalized address type
     ciField*        _field;         // relevant instance field, or null if none
     const Type*     _element;       // relevant array element type, or null if none
     bool            _is_rewritable; // false if the memory is write-once only
     int             _general_index; // if this is type is an instance, the general
                                     // type that this is an instance of
     void Init(int i, const TypePtr* at);
    public:
     int             index()         const { return _index; }
     const TypePtr*  adr_type()      const { return _adr_type; }
     ciField*        field()         const { return _field; }
     const Type*     element()       const { return _element; }
     bool            is_rewritable() const { return _is_rewritable; }
     bool            is_volatile()   const { return (_field ? _field->is_volatile() : false); }
     int             general_index() const { return (_general_index != 0) ? _general_index : _index; }
     void set_rewritable(bool z) { _is_rewritable = z; }
     void set_field(ciField* f) {
       assert(!_field,"");
       _field = f;
       if (f->is_final() || f->is_stable()) {
         // In the case of @Stable, multiple writes are possible but may be assumed to be no-ops.
         _is_rewritable = false;
       }
     }
     void set_element(const Type* e) {
       assert(_element == NULL, "");
       _element = e;
     }
     void print_on(outputStream* st) PRODUCT_RETURN;
   };
   enum {
     logAliasCacheSize = 6,
     AliasCacheSize = (1<<logAliasCacheSize)
   };
   struct AliasCacheEntry { const TypePtr* _adr_type; int _index; };  // simple duple type
   enum {
     trapHistLength = MethodData::_trap_hist_limit
   };
   // Constant entry of the constant table.
   class Constant {
   private:
     BasicType _type;
     union {
       jvalue    _value;
       Metadata* _metadata;
     } _v;
     int       _offset;         // offset of this constant (in bytes) relative to the constant table base.
     float     _freq;
     bool      _can_be_reused;  // true (default) if the value can be shared with other users.
   public:
     Constant() : _type(T_ILLEGAL), _offset(-1), _freq(0.0f), _can_be_reused(true) { _v._value.l = 0; }
     Constant(BasicType type, jvalue value, float freq = 0.0f, bool can_be_reused = true) :
       _type(type),
       _offset(-1),
       _freq(freq),
       _can_be_reused(can_be_reused)
     {
       assert(type != T_METADATA, "wrong constructor");
       _v._value = value;
     }
     Constant(Metadata* metadata, bool can_be_reused = true) :
       _type(T_METADATA),
       _offset(-1),
       _freq(0.0f),
       _can_be_reused(can_be_reused)
     {
       _v._metadata = metadata;
     }
     bool operator==(const Constant& other);
     BasicType type()      const    { return _type; }
     jlong   get_jlong()   const    { return _v._value.j; }
     jfloat  get_jfloat()  const    { return _v._value.f; }
     jdouble get_jdouble() const    { return _v._value.d; }
     jobject get_jobject() const    { return _v._value.l; }
     Metadata* get_metadata() const { return _v._metadata; }
     int         offset()  const    { return _offset; }
     void    set_offset(int offset) {        _offset = offset; }
     float       freq()    const    { return _freq;         }
     void    inc_freq(float freq)   {        _freq += freq; }
     bool    can_be_reused() const  { return _can_be_reused; }
   };
   // Constant table.
   class ConstantTable {
   private:
     GrowableArray<Constant> _constants;          // Constants of this table.
     int                     _size;               // Size in bytes the emitted constant table takes (including padding).
     int                     _table_base_offset;  // Offset of the table base that gets added to the constant offsets.
     int                     _nof_jump_tables;    // Number of jump-tables in this constant table.
     static int qsort_comparator(Constant* a, Constant* b);
     // We use negative frequencies to keep the order of the
     // jump-tables in which they were added.  Otherwise we get into
     // trouble with relocation.
     float next_jump_table_freq() { return -1.0f * (++_nof_jump_tables); }
   public:
     ConstantTable() :
       _size(-1),
       _table_base_offset(-1),  // We can use -1 here since the constant table is always bigger than 2 bytes (-(size / 2), see MachConstantBaseNode::emit).
       _nof_jump_tables(0)
     {}
     int size() const { assert(_size != -1, "not calculated yet"); return _size; }
     int calculate_table_base_offset() const;  // AD specific
     void set_table_base_offset(int x)  { assert(_table_base_offset == -1 || x == _table_base_offset, "can't change"); _table_base_offset = x; }
     int      table_base_offset() const { assert(_table_base_offset != -1, "not set yet");                      return _table_base_offset; }
     void emit(CodeBuffer& cb);
     // Returns the offset of the last entry (the top) of the constant table.
     int  top_offset() const { assert(_constants.top().offset() != -1, "not bound yet"); return _constants.top().offset(); }
     void calculate_offsets_and_size();
     int  find_offset(Constant& con) const;
     void     add(Constant& con);
     Constant add(MachConstantNode* n, BasicType type, jvalue value);
     Constant add(Metadata* metadata);
     Constant add(MachConstantNode* n, MachOper* oper);
     Constant add(MachConstantNode* n, jfloat f) {
       jvalue value; value.f = f;
       return add(n, T_FLOAT, value);
     }
     Constant add(MachConstantNode* n, jdouble d) {
       jvalue value; value.d = d;
       return add(n, T_DOUBLE, value);
     }
     // Jump-table
     Constant  add_jump_table(MachConstantNode* n);
     void     fill_jump_table(CodeBuffer& cb, MachConstantNode* n, GrowableArray<Label*> labels) const;
   };
  private:
   // Fixed parameters to this compilation.
   const int             _compile_id;
   const bool            _save_argument_registers; // save/restore arg regs for trampolines
   const bool            _subsume_loads;         // Load can be matched as part of a larger op.
   const bool            _do_escape_analysis;    // Do escape analysis.
   const bool            _eliminate_boxing;      // Do boxing elimination.
   ciMethod*             _method;                // The method being compiled.
   int                   _entry_bci;             // entry bci for osr methods.
   const TypeFunc*       _tf;                    // My kind of signature
   InlineTree*           _ilt;                   // Ditto (temporary).
   address               _stub_function;         // VM entry for stub being compiled, or NULL
   const char*           _stub_name;             // Name of stub or adapter being compiled, or NULL
   address               _stub_entry_point;      // Compile code entry for generated stub, or NULL
   // Control of this compilation.
   int                   _num_loop_opts;         // Number of iterations for doing loop optimiztions
   int                   _max_inline_size;       // Max inline size for this compilation
   int                   _freq_inline_size;      // Max hot method inline size for this compilation
   int                   _fixed_slots;           // count of frame slots not allocated by the register
                                                 // allocator i.e. locks, original deopt pc, etc.
   uintx                 _max_node_limit;        // Max unique node count during a single compilation.
   // For deopt
   int                   _orig_pc_slot;
   int                   _orig_pc_slot_offset_in_bytes;
   int                   _major_progress;        // Count of something big happening
   bool                  _inlining_progress;     // progress doing incremental inlining?
   bool                  _inlining_incrementally;// Are we doing incremental inlining (post parse)
   bool                  _has_loops;             // True if the method _may_ have some loops
   bool                  _has_split_ifs;         // True if the method _may_ have some split-if
   bool                  _has_unsafe_access;     // True if the method _may_ produce faults in unsafe loads or stores.
   bool                  _has_stringbuilder;     // True StringBuffers or StringBuilders are allocated
   bool                  _has_boxed_value;       // True if a boxed object is allocated
   int                   _max_vector_size;       // Maximum size of generated vectors
   uint                  _trap_hist[trapHistLength];  // Cumulative traps
   bool                  _trap_can_recompile;    // Have we emitted a recompiling trap?
   uint                  _decompile_count;       // Cumulative decompilation counts.
   bool                  _do_inlining;           // True if we intend to do inlining
   bool                  _do_scheduling;         // True if we intend to do scheduling
   bool                  _do_freq_based_layout;  // True if we intend to do frequency based block layout
   bool                  _do_count_invocations;  // True if we generate code to count invocations
   bool                  _do_method_data_update; // True if we generate code to update MethodData*s
   int                   _AliasLevel;            // Locally-adjusted version of AliasLevel flag.
   bool                  _print_assembly;        // True if we should dump assembly code for this compilation
   bool                  _print_inlining;        // True if we should print inlining for this compilation
   bool                  _print_intrinsics;      // True if we should print intrinsics for this compilation
 #ifndef PRODUCT
   bool                  _trace_opto_output;
   bool                  _parsed_irreducible_loop; // True if ciTypeFlow detected irreducible loops during parsing
 #endif
   bool                  _has_irreducible_loop;  // Found irreducible loops
   // JSR 292
   bool                  _has_method_handle_invokes; // True if this method has MethodHandle invokes.
   RTMState              _rtm_state;             // State of Restricted Transactional Memory usage
   // Compilation environment.
   Arena                 _comp_arena;            // Arena with lifetime equivalent to Compile
   ciEnv*                _env;                   // CI interface
   CompileLog*           _log;                   // from CompilerThread
   const char*           _failure_reason;        // for record_failure/failing pattern
   GrowableArray<CallGenerator*>* _intrinsics;   // List of intrinsics.
   GrowableArray<Node*>* _macro_nodes;           // List of nodes which need to be expanded before matching.
   GrowableArray<Node*>* _predicate_opaqs;       // List of Opaque1 nodes for the loop predicates.
   GrowableArray<Node*>* _expensive_nodes;       // List of nodes that are expensive to compute and that we'd better not let the GVN freely common
   ConnectionGraph*      _congraph;
 #ifndef PRODUCT
   IdealGraphPrinter*    _printer;
 #endif
   // Node management
   uint                  _unique;                // Counter for unique Node indices
   VectorSet             _dead_node_list;        // Set of dead nodes
   uint                  _dead_node_count;       // Number of dead nodes; VectorSet::Size() is O(N).
                                                 // So use this to keep count and make the call O(1).
   debug_only(static int _debug_idx;)            // Monotonic counter (not reset), use -XX:BreakAtNode=<idx>
   Arena                 _node_arena;            // Arena for new-space Nodes
   Arena                 _old_arena;             // Arena for old-space Nodes, lifetime during xform
   RootNode*             _root;                  // Unique root of compilation, or NULL after bail-out.
   Node*                 _top;                   // Unique top node.  (Reset by various phases.)
   Node*                 _immutable_memory;      // Initial memory state
   Node*                 _recent_alloc_obj;
   Node*                 _recent_alloc_ctl;
   // Constant table
   ConstantTable         _constant_table;        // The constant table for this compile.
   MachConstantBaseNode* _mach_constant_base_node;  // Constant table base node singleton.
   // Blocked array of debugging and profiling information,
   // tracked per node.
   enum { _log2_node_notes_block_size = 8,
          _node_notes_block_size = (1<<_log2_node_notes_block_size)
   };
   GrowableArray<Node_Notes*>* _node_note_array;
   Node_Notes*           _default_node_notes;  // default notes for new nodes
   // After parsing and every bulk phase we hang onto the Root instruction.
   // The RootNode instruction is where the whole program begins.  It produces
   // the initial Control and BOTTOM for everybody else.
   // Type management
   Arena                 _Compile_types;         // Arena for all types
   Arena*                _type_arena;            // Alias for _Compile_types except in Initialize_shared()
   Dict*                 _type_dict;             // Intern table
   void*                 _type_hwm;              // Last allocation (see Type::operator new/delete)
   size_t                _type_last_size;        // Last allocation size (see Type::operator new/delete)
   ciMethod*             _last_tf_m;             // Cache for
   const TypeFunc*       _last_tf;               //  TypeFunc::make
   AliasType**           _alias_types;           // List of alias types seen so far.
   int                   _num_alias_types;       // Logical length of _alias_types
   int                   _max_alias_types;       // Physical length of _alias_types
   AliasCacheEntry       _alias_cache[AliasCacheSize]; // Gets aliases w/o data structure walking
   // Parsing, optimization
   PhaseGVN*             _initial_gvn;           // Results of parse-time PhaseGVN
   Unique_Node_List*     _for_igvn;              // Initial work-list for next round of Iterative GVN
   WarmCallInfo*         _warm_calls;            // Sorted work-list for heat-based inlining.
   GrowableArray<CallGenerator*> _late_inlines;        // List of CallGenerators to be revisited after
                                                       // main parsing has finished.
   GrowableArray<CallGenerator*> _string_late_inlines; // same but for string operations
   GrowableArray<CallGenerator*> _boxing_late_inlines; // same but for boxing operations
   int                           _late_inlines_pos;    // Where in the queue should the next late inlining candidate go (emulate depth first inlining)
   uint                          _number_of_mh_late_inlines; // number of method handle late inlining still pending
   // Inlining may not happen in parse order which would make
   // PrintInlining output confusing. Keep track of PrintInlining
   // pieces in order.
   class PrintInliningBuffer : public ResourceObj {
    private:
     CallGenerator* _cg;
     stringStream* _ss;
    public:
     PrintInliningBuffer()
       : _cg(NULL) { _ss = new stringStream(); }
     stringStream* ss() const { return _ss; }
     CallGenerator* cg() const { return _cg; }
     void set_cg(CallGenerator* cg) { _cg = cg; }
   };
   GrowableArray<PrintInliningBuffer>* _print_inlining_list;
   int _print_inlining_idx;
   // Only keep nodes in the expensive node list that need to be optimized
   void cleanup_expensive_nodes(PhaseIterGVN &igvn);
   // Use for sorting expensive nodes to bring similar nodes together
   static int cmp_expensive_nodes(Node** n1, Node** n2);
   // Expensive nodes list already sorted?
   bool expensive_nodes_sorted() const;
   // Remove the speculative part of types and clean up the graph
   void remove_speculative_types(PhaseIterGVN &igvn);
   void* _replay_inline_data; // Pointer to data loaded from file
  public:
   outputStream* print_inlining_stream() const {
     return _print_inlining_list->adr_at(_print_inlining_idx)->ss();
   }
   void print_inlining_skip(CallGenerator* cg) {
     if (_print_inlining) {
       _print_inlining_list->adr_at(_print_inlining_idx)->set_cg(cg);
       _print_inlining_idx++;
       _print_inlining_list->insert_before(_print_inlining_idx, PrintInliningBuffer());
     }
   }
   void print_inlining_insert(CallGenerator* cg) {
     if (_print_inlining) {
       for (int i = 0; i < _print_inlining_list->length(); i++) {
         if (_print_inlining_list->adr_at(i)->cg() == cg) {
           _print_inlining_list->insert_before(i+1, PrintInliningBuffer());
           _print_inlining_idx = i+1;
           _print_inlining_list->adr_at(i)->set_cg(NULL);
           return;
         }
       }
       ShouldNotReachHere();
     }
   }
   void print_inlining(ciMethod* method, int inline_level, int bci, const char* msg = NULL) {
     stringStream ss;
     CompileTask::print_inlining(&ss, method, inline_level, bci, msg);
     print_inlining_stream()->print("%s", ss.as_string());
   }
   void* replay_inline_data() const { return _replay_inline_data; }
   // Dump inlining replay data to the stream.
   void dump_inline_data(outputStream* out);
  private:
   // Matching, CFG layout, allocation, code generation
   PhaseCFG*             _cfg;                   // Results of CFG finding
   bool                  _select_24_bit_instr;   // We selected an instruction with a 24-bit result
   bool                  _in_24_bit_fp_mode;     // We are emitting instructions with 24-bit results
   int                   _java_calls;            // Number of java calls in the method
   int                   _inner_loops;           // Number of inner loops in the method
   Matcher*              _matcher;               // Engine to map ideal to machine instructions
   PhaseRegAlloc*        _regalloc;              // Results of register allocation.
   int                   _frame_slots;           // Size of total frame in stack slots
   CodeOffsets           _code_offsets;          // Offsets into the code for various interesting entries
   RegMask               _FIRST_STACK_mask;      // All stack slots usable for spills (depends on frame layout)
   Arena*                _indexSet_arena;        // control IndexSet allocation within PhaseChaitin
   void*                 _indexSet_free_block_list; // free list of IndexSet bit blocks
   int                   _interpreter_frame_size;
   uint                  _node_bundling_limit;
   Bundle*               _node_bundling_base;    // Information for instruction bundling
   // Instruction bits passed off to the VM
   int                   _method_size;           // Size of nmethod code segment in bytes
   CodeBuffer            _code_buffer;           // Where the code is assembled
   int                   _first_block_size;      // Size of unvalidated entry point code / OSR poison code
   ExceptionHandlerTable _handler_table;         // Table of native-code exception handlers
   ImplicitExceptionTable _inc_table;            // Table of implicit null checks in native code
   OopMapSet*            _oop_map_set;           // Table of oop maps (one for each safepoint location)
   static int            _CompiledZap_count;     // counter compared against CompileZap[First/Last]
   BufferBlob*           _scratch_buffer_blob;   // For temporary code buffers.
   relocInfo*            _scratch_locs_memory;   // For temporary code buffers.
   int                   _scratch_const_size;    // For temporary code buffers.
   bool                  _in_scratch_emit_size;  // true when in scratch_emit_size.
  public:
   // Accessors
   // The Compile instance currently active in this (compiler) thread.
   static Compile* current() {
     return (Compile*) ciEnv::current()->compiler_data();
   }
   // ID for this compilation.  Useful for setting breakpoints in the debugger.
   int               compile_id() const          { return _compile_id; }
   // Does this compilation allow instructions to subsume loads?  User
   // instructions that subsume a load may result in an unschedulable
   // instruction sequence.
   bool              subsume_loads() const       { return _subsume_loads; }
   /** Do escape analysis. */
   bool              do_escape_analysis() const  { return _do_escape_analysis; }
   /** Do boxing elimination. */
   bool              eliminate_boxing() const    { return _eliminate_boxing; }
   /** Do aggressive boxing elimination. */
   bool              aggressive_unboxing() const { return _eliminate_boxing && AggressiveUnboxing; }
   bool              save_argument_registers() const { return _save_argument_registers; }
   // Other fixed compilation parameters.
   ciMethod*         method() const              { return _method; }
   int               entry_bci() const           { return _entry_bci; }
   bool              is_osr_compilation() const  { return _entry_bci != InvocationEntryBci; }
   bool              is_method_compilation() const { return (_method != NULL && !_method->flags().is_native()); }
   const TypeFunc*   tf() const                  { assert(_tf!=NULL, ""); return _tf; }
   void         init_tf(const TypeFunc* tf)      { assert(_tf==NULL, ""); _tf = tf; }
   InlineTree*       ilt() const                 { return _ilt; }
   address           stub_function() const       { return _stub_function; }
   const char*       stub_name() const           { return _stub_name; }
   address           stub_entry_point() const    { return _stub_entry_point; }
   // Control of this compilation.
   int               fixed_slots() const         { assert(_fixed_slots >= 0, "");         return _fixed_slots; }
   void          set_fixed_slots(int n)          { _fixed_slots = n; }
   int               major_progress() const      { return _major_progress; }
   void          set_inlining_progress(bool z)   { _inlining_progress = z; }
   int               inlining_progress() const   { return _inlining_progress; }
   void          set_inlining_incrementally(bool z) { _inlining_incrementally = z; }
   int               inlining_incrementally() const { return _inlining_incrementally; }
   void          set_major_progress()            { _major_progress++; }
   void        clear_major_progress()            { _major_progress = 0; }
   int               num_loop_opts() const       { return _num_loop_opts; }
   void          set_num_loop_opts(int n)        { _num_loop_opts = n; }
   int               max_inline_size() const     { return _max_inline_size; }
   void          set_freq_inline_size(int n)     { _freq_inline_size = n; }
   int               freq_inline_size() const    { return _freq_inline_size; }
   void          set_max_inline_size(int n)      { _max_inline_size = n; }
   bool              has_loops() const           { return _has_loops; }
   void          set_has_loops(bool z)           { _has_loops = z; }
   bool              has_split_ifs() const       { return _has_split_ifs; }
   void          set_has_split_ifs(bool z)       { _has_split_ifs = z; }
   bool              has_unsafe_access() const   { return _has_unsafe_access; }
   void          set_has_unsafe_access(bool z)   { _has_unsafe_access = z; }
   bool              has_stringbuilder() const   { return _has_stringbuilder; }
   void          set_has_stringbuilder(bool z)   { _has_stringbuilder = z; }
   bool              has_boxed_value() const     { return _has_boxed_value; }
   void          set_has_boxed_value(bool z)     { _has_boxed_value = z; }
   int               max_vector_size() const     { return _max_vector_size; }
   void          set_max_vector_size(int s)      { _max_vector_size = s; }
   void          set_trap_count(uint r, uint c)  { assert(r < trapHistLength, "oob");        _trap_hist[r] = c; }
   uint              trap_count(uint r) const    { assert(r < trapHistLength, "oob"); return _trap_hist[r]; }
   bool              trap_can_recompile() const  { return _trap_can_recompile; }
   void          set_trap_can_recompile(bool z)  { _trap_can_recompile = z; }
   uint              decompile_count() const     { return _decompile_count; }
   void          set_decompile_count(uint c)     { _decompile_count = c; }
   bool              allow_range_check_smearing() const;
   bool              do_inlining() const         { return _do_inlining; }
   void          set_do_inlining(bool z)         { _do_inlining = z; }
   bool              do_scheduling() const       { return _do_scheduling; }
   void          set_do_scheduling(bool z)       { _do_scheduling = z; }
   bool              do_freq_based_layout() const{ return _do_freq_based_layout; }
   void          set_do_freq_based_layout(bool z){ _do_freq_based_layout = z; }
   bool              do_count_invocations() const{ return _do_count_invocations; }
   void          set_do_count_invocations(bool z){ _do_count_invocations = z; }
   bool              do_method_data_update() const { return _do_method_data_update; }
   void          set_do_method_data_update(bool z) { _do_method_data_update = z; }
   int               AliasLevel() const          { return _AliasLevel; }
   bool              print_assembly() const       { return _print_assembly; }
   void          set_print_assembly(bool z)       { _print_assembly = z; }
   bool              print_inlining() const       { return _print_inlining; }
   void          set_print_inlining(bool z)       { _print_inlining = z; }
   bool              print_intrinsics() const     { return _print_intrinsics; }
   void          set_print_intrinsics(bool z)     { _print_intrinsics = z; }
   RTMState          rtm_state()  const           { return _rtm_state; }
   void          set_rtm_state(RTMState s)        { _rtm_state = s; }
   bool              use_rtm() const              { return (_rtm_state & NoRTM) == 0; }
   bool          profile_rtm() const              { return _rtm_state == ProfileRTM; }
   uint              max_node_limit() const       { return (uint)_max_node_limit; }
   void          set_max_node_limit(uint n)       { _max_node_limit = n; }
   // check the CompilerOracle for special behaviours for this compile
   bool          method_has_option(const char * option) {
     return method() != NULL && method()->has_option(option);
   }
   template<typename T>
   bool          method_has_option_value(const char * option, T& value) {
     return method() != NULL && method()->has_option_value(option, value);
   }
 #ifndef PRODUCT
   bool          trace_opto_output() const       { return _trace_opto_output; }
   bool              parsed_irreducible_loop() const { return _parsed_irreducible_loop; }
   void          set_parsed_irreducible_loop(bool z) { _parsed_irreducible_loop = z; }
   int _in_dump_cnt;  // Required for dumping ir nodes.
 #endif
   bool              has_irreducible_loop() const { return _has_irreducible_loop; }
   void          set_has_irreducible_loop(bool z) { _has_irreducible_loop = z; }
   // JSR 292
   bool              has_method_handle_invokes() const { return _has_method_handle_invokes;     }
   void          set_has_method_handle_invokes(bool z) {        _has_method_handle_invokes = z; }
   Ticks _latest_stage_start_counter;
   void begin_method() {
 #ifndef PRODUCT
     if (_printer) _printer->begin_method(this);
 #endif
     C->_latest_stage_start_counter.stamp();
   }
   void print_method(CompilerPhaseType cpt, int level = 1) {
     EventCompilerPhase event;
     if (event.should_commit()) {
       event.set_starttime(C->_latest_stage_start_counter);
       event.set_phase((u1) cpt);
       event.set_compileID(C->_compile_id);
       event.set_phaseLevel(level);
       event.commit();
     }
 #ifndef PRODUCT
     if (_printer) _printer->print_method(this, CompilerPhaseTypeHelper::to_string(cpt), level);
 #endif
     C->_latest_stage_start_counter.stamp();
   }
   void end_method(int level = 1) {
     EventCompilerPhase event;
     if (event.should_commit()) {
       event.set_starttime(C->_latest_stage_start_counter);
       event.set_phase((u1) PHASE_END);
       event.set_compileID(C->_compile_id);
       event.set_phaseLevel(level);
       event.commit();
     }
 #ifndef PRODUCT
     if (_printer) _printer->end_method();
 #endif
   }
   int           macro_count()             const { return _macro_nodes->length(); }
   int           predicate_count()         const { return _predicate_opaqs->length();}
   int           expensive_count()         const { return _expensive_nodes->length(); }
   Node*         macro_node(int idx)       const { return _macro_nodes->at(idx); }
   Node*         predicate_opaque1_node(int idx) const { return _predicate_opaqs->at(idx);}
   Node*         expensive_node(int idx)   const { return _expensive_nodes->at(idx); }
   ConnectionGraph* congraph()                   { return _congraph;}
   void set_congraph(ConnectionGraph* congraph)  { _congraph = congraph;}
   void add_macro_node(Node * n) {
     //assert(n->is_macro(), "must be a macro node");
     assert(!_macro_nodes->contains(n), " duplicate entry in expand list");
     _macro_nodes->append(n);
   }
   void remove_macro_node(Node * n) {
     // this function may be called twice for a node so check
     // that the node is in the array before attempting to remove it
     if (_macro_nodes->contains(n))
       _macro_nodes->remove(n);
     // remove from _predicate_opaqs list also if it is there
     if (predicate_count() > 0 && _predicate_opaqs->contains(n)){
       _predicate_opaqs->remove(n);
     }
   }
   void add_expensive_node(Node * n);
   void remove_expensive_node(Node * n) {
     if (_expensive_nodes->contains(n)) {
       _expensive_nodes->remove(n);
     }
   }
   void add_predicate_opaq(Node * n) {
     assert(!_predicate_opaqs->contains(n), " duplicate entry in predicate opaque1");
     assert(_macro_nodes->contains(n), "should have already been in macro list");
     _predicate_opaqs->append(n);
   }
   // remove the opaque nodes that protect the predicates so that the unused checks and
   // uncommon traps will be eliminated from the graph.
   void cleanup_loop_predicates(PhaseIterGVN &igvn);
   bool is_predicate_opaq(Node * n) {
     return _predicate_opaqs->contains(n);
   }
   // Are there candidate expensive nodes for optimization?
   bool should_optimize_expensive_nodes(PhaseIterGVN &igvn);
   // Check whether n1 and n2 are similar
   static int cmp_expensive_nodes(Node* n1, Node* n2);
   // Sort expensive nodes to locate similar expensive nodes
   void sort_expensive_nodes();
   // Compilation environment.
   Arena*            comp_arena()                { return &_comp_arena; }
   ciEnv*            env() const                 { return _env; }
   CompileLog*       log() const                 { return _log; }
   bool              failing() const             { return _env->failing() || _failure_reason != NULL; }
   const char*       failure_reason() { return _failure_reason; }
   bool              failure_reason_is(const char* r) { return (r==_failure_reason) || (r!=NULL && _failure_reason!=NULL && strcmp(r, _failure_reason)==0); }
   void record_failure(const char* reason);
   void record_method_not_compilable(const char* reason, bool all_tiers = false) {
     // All bailouts cover "all_tiers" when TieredCompilation is off.
     if (!TieredCompilation) all_tiers = true;
     env()->record_method_not_compilable(reason, all_tiers);
     // Record failure reason.
     record_failure(reason);
   }
   void record_method_not_compilable_all_tiers(const char* reason) {
     record_method_not_compilable(reason, true);
   }
   bool check_node_count(uint margin, const char* reason) {
     if (live_nodes() + margin > max_node_limit()) {
       record_method_not_compilable(reason);
       return true;
     } else {
       return false;
     }
   }
   // Node management
   uint         unique() const              { return _unique; }
   uint         next_unique()               { return _unique++; }
   void         set_unique(uint i)          { _unique = i; }
   static int   debug_idx()                 { return debug_only(_debug_idx)+0; }
   static void  set_debug_idx(int i)        { debug_only(_debug_idx = i); }
   Arena*       node_arena()                { return &_node_arena; }
   Arena*       old_arena()                 { return &_old_arena; }
   RootNode*    root() const                { return _root; }
   void         set_root(RootNode* r)       { _root = r; }
   StartNode*   start() const;              // (Derived from root.)
   void         init_start(StartNode* s);
   Node*        immutable_memory();
   Node*        recent_alloc_ctl() const    { return _recent_alloc_ctl; }
   Node*        recent_alloc_obj() const    { return _recent_alloc_obj; }
   void         set_recent_alloc(Node* ctl, Node* obj) {
                                                   _recent_alloc_ctl = ctl;
                                                   _recent_alloc_obj = obj;
                                            }
   void         record_dead_node(uint idx)  { if (_dead_node_list.test_set(idx)) return;
                                              _dead_node_count++;
                                            }
   bool         is_dead_node(uint idx)      { return _dead_node_list.test(idx) != 0; }
   uint         dead_node_count()           { return _dead_node_count; }
   void         reset_dead_node_list()      { _dead_node_list.Reset();
                                              _dead_node_count = 0;
                                            }
   uint          live_nodes() const         {
     int  val = _unique - _dead_node_count;
     assert (val >= 0, err_msg_res("number of tracked dead nodes %d more than created nodes %d", _unique, _dead_node_count));
             return (uint) val;
                                            }
 #ifdef ASSERT
   uint         count_live_nodes_by_graph_walk();
   void         print_missing_nodes();
 #endif
   // Constant table
   ConstantTable&   constant_table() { return _constant_table; }
   MachConstantBaseNode*     mach_constant_base_node();
   bool                  has_mach_constant_base_node() const { return _mach_constant_base_node != NULL; }
   // Generated by adlc, true if CallNode requires MachConstantBase.
   bool                      needs_clone_jvms();
   // Handy undefined Node
   Node*             top() const                 { return _top; }
   // these are used by guys who need to know about creation and transformation of top:
   Node*             cached_top_node()           { return _top; }
   void          set_cached_top_node(Node* tn);
   GrowableArray<Node_Notes*>* node_note_array() const { return _node_note_array; }
   void set_node_note_array(GrowableArray<Node_Notes*>* arr) { _node_note_array = arr; }
   Node_Notes* default_node_notes() const        { return _default_node_notes; }
   void    set_default_node_notes(Node_Notes* n) { _default_node_notes = n; }
   Node_Notes*       node_notes_at(int idx) {
     return locate_node_notes(_node_note_array, idx, false);
   }
   inline bool   set_node_notes_at(int idx, Node_Notes* value);
   // Copy notes from source to dest, if they exist.
   // Overwrite dest only if source provides something.
   // Return true if information was moved.
   bool copy_node_notes_to(Node* dest, Node* source);
   // Workhorse function to sort out the blocked Node_Notes array:
   inline Node_Notes* locate_node_notes(GrowableArray<Node_Notes*>* arr,
                                        int idx, bool can_grow = false);
   void grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by);
   // Type management
   Arena*            type_arena()                { return _type_arena; }
   Dict*             type_dict()                 { return _type_dict; }
   void*             type_hwm()                  { return _type_hwm; }
   size_t            type_last_size()            { return _type_last_size; }
   int               num_alias_types()           { return _num_alias_types; }
   void          init_type_arena()                       { _type_arena = &_Compile_types; }
   void          set_type_arena(Arena* a)                { _type_arena = a; }
   void          set_type_dict(Dict* d)                  { _type_dict = d; }
   void          set_type_hwm(void* p)                   { _type_hwm = p; }
   void          set_type_last_size(size_t sz)           { _type_last_size = sz; }
   const TypeFunc* last_tf(ciMethod* m) {
     return (m == _last_tf_m) ? _last_tf : NULL;
   }
   void set_last_tf(ciMethod* m, const TypeFunc* tf) {
     assert(m != NULL || tf == NULL, "");
     _last_tf_m = m;
     _last_tf = tf;
   }
   AliasType*        alias_type(int                idx)  { assert(idx < num_alias_types(), "oob"); return _alias_types[idx]; }
   AliasType*        alias_type(const TypePtr* adr_type, ciField* field = NULL) { return find_alias_type(adr_type, false, field); }
   bool         have_alias_type(const TypePtr* adr_type);
   AliasType*        alias_type(ciField*         field);
   int               get_alias_index(const TypePtr* at)  { return alias_type(at)->index(); }
   const TypePtr*    get_adr_type(uint aidx)             { return alias_type(aidx)->adr_type(); }
   int               get_general_index(uint aidx)        { return alias_type(aidx)->general_index(); }
   // Building nodes
   void              rethrow_exceptions(JVMState* jvms);
   void              return_values(JVMState* jvms);
   JVMState*         build_start_state(StartNode* start, const TypeFunc* tf);
   // Decide how to build a call.
   // The profile factor is a discount to apply to this site's interp. profile.
   CallGenerator*    call_generator(ciMethod* call_method, int vtable_index, bool call_does_dispatch,
                                    JVMState* jvms, bool allow_inline, float profile_factor, ciKlass* speculative_receiver_type = NULL,
                                    bool allow_intrinsics = true, bool delayed_forbidden = false);
   bool should_delay_inlining(ciMethod* call_method, JVMState* jvms) {
     return should_delay_string_inlining(call_method, jvms) ||
            should_delay_boxing_inlining(call_method, jvms);
   }
   bool should_delay_string_inlining(ciMethod* call_method, JVMState* jvms);
   bool should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms);
   // Helper functions to identify inlining potential at call-site
   ciMethod* optimize_virtual_call(ciMethod* caller, int bci, ciInstanceKlass* klass,
                                   ciKlass* holder, ciMethod* callee,
                                   const TypeOopPtr* receiver_type, bool is_virtual,
                                   bool &call_does_dispatch, int &vtable_index,
                                   bool check_access = true);
   ciMethod* optimize_inlining(ciMethod* caller, int bci, ciInstanceKlass* klass,
                               ciMethod* callee, const TypeOopPtr* receiver_type,
                               bool check_access = true);
   // Report if there were too many traps at a current method and bci.
   // Report if a trap was recorded, and/or PerMethodTrapLimit was exceeded.
   // If there is no MDO at all, report no trap unless told to assume it.
   bool too_many_traps(ciMethod* method, int bci, Deoptimization::DeoptReason reason);
   // This version, unspecific to a particular bci, asks if
   // PerMethodTrapLimit was exceeded for all inlined methods seen so far.
   bool too_many_traps(Deoptimization::DeoptReason reason,
                       // Privately used parameter for logging:
                       ciMethodData* logmd = NULL);
   // Report if there were too many recompiles at a method and bci.
   bool too_many_recompiles(ciMethod* method, int bci, Deoptimization::DeoptReason reason);
   // Return a bitset with the reasons where deoptimization is allowed,
   // i.e., where there were not too many uncommon traps.
   int _allowed_reasons;
   int      allowed_deopt_reasons() { return _allowed_reasons; }
   void set_allowed_deopt_reasons();
   // Parsing, optimization
   PhaseGVN*         initial_gvn()               { return _initial_gvn; }
   Unique_Node_List* for_igvn()                  { return _for_igvn; }
   inline void       record_for_igvn(Node* n);   // Body is after class Unique_Node_List.
   void          set_initial_gvn(PhaseGVN *gvn)           { _initial_gvn = gvn; }
   void          set_for_igvn(Unique_Node_List *for_igvn) { _for_igvn = for_igvn; }
   // Replace n by nn using initial_gvn, calling hash_delete and
   // record_for_igvn as needed.
   void gvn_replace_by(Node* n, Node* nn);
   void              identify_useful_nodes(Unique_Node_List &useful);
   void              update_dead_node_list(Unique_Node_List &useful);
   void              remove_useless_nodes (Unique_Node_List &useful);
   WarmCallInfo*     warm_calls() const          { return _warm_calls; }
   void          set_warm_calls(WarmCallInfo* l) { _warm_calls = l; }
   WarmCallInfo* pop_warm_call();
   // Record this CallGenerator for inlining at the end of parsing.
   void              add_late_inline(CallGenerator* cg)        {
     _late_inlines.insert_before(_late_inlines_pos, cg);
     _late_inlines_pos++;
   }
   void              prepend_late_inline(CallGenerator* cg)    {
     _late_inlines.insert_before(0, cg);
   }
   void              add_string_late_inline(CallGenerator* cg) {
     _string_late_inlines.push(cg);
   }
   void              add_boxing_late_inline(CallGenerator* cg) {
     _boxing_late_inlines.push(cg);
   }
   void remove_useless_late_inlines(GrowableArray<CallGenerator*>* inlines, Unique_Node_List &useful);
   void dump_inlining();
   bool over_inlining_cutoff() const {
     if (!inlining_incrementally()) {
       return unique() > (uint)NodeCountInliningCutoff;
     } else {
       return live_nodes() > (uint)LiveNodeCountInliningCutoff;
     }
   }
   void inc_number_of_mh_late_inlines() { _number_of_mh_late_inlines++; }
   void dec_number_of_mh_late_inlines() { assert(_number_of_mh_late_inlines > 0, "_number_of_mh_late_inlines < 0 !"); _number_of_mh_late_inlines--; }
   bool has_mh_late_inlines() const     { return _number_of_mh_late_inlines > 0; }
   void inline_incrementally_one(PhaseIterGVN& igvn);
   void inline_incrementally(PhaseIterGVN& igvn);
   void inline_string_calls(bool parse_time);
   void inline_boxing_calls(PhaseIterGVN& igvn);
   // Matching, CFG layout, allocation, code generation
   PhaseCFG*         cfg()                       { return _cfg; }
   bool              select_24_bit_instr() const { return _select_24_bit_instr; }
   bool              in_24_bit_fp_mode() const   { return _in_24_bit_fp_mode; }
   bool              has_java_calls() const      { return _java_calls > 0; }
   int               java_calls() const          { return _java_calls; }
   int               inner_loops() const         { return _inner_loops; }
   Matcher*          matcher()                   { return _matcher; }
   PhaseRegAlloc*    regalloc()                  { return _regalloc; }
   int               frame_slots() const         { return _frame_slots; }
   int               frame_size_in_words() const; // frame_slots in units of the polymorphic 'words'
   int               frame_size_in_bytes() const { return _frame_slots << LogBytesPerInt; }
   RegMask&          FIRST_STACK_mask()          { return _FIRST_STACK_mask; }
   Arena*            indexSet_arena()            { return _indexSet_arena; }
   void*             indexSet_free_block_list()  { return _indexSet_free_block_list; }
   uint              node_bundling_limit()       { return _node_bundling_limit; }
   Bundle*           node_bundling_base()        { return _node_bundling_base; }
   void          set_node_bundling_limit(uint n) { _node_bundling_limit = n; }
   void          set_node_bundling_base(Bundle* b) { _node_bundling_base = b; }
   bool          starts_bundle(const Node *n) const;
   bool          need_stack_bang(int frame_size_in_bytes) const;
   bool          need_register_stack_bang() const;
   void  update_interpreter_frame_size(int size) {
     if (_interpreter_frame_size < size) {
       _interpreter_frame_size = size;
     }
   }
   int           bang_size_in_bytes() const;
   void          set_matcher(Matcher* m)                 { _matcher = m; }
 //void          set_regalloc(PhaseRegAlloc* ra)           { _regalloc = ra; }
   void          set_indexSet_arena(Arena* a)            { _indexSet_arena = a; }
   void          set_indexSet_free_block_list(void* p)   { _indexSet_free_block_list = p; }
   // Remember if this compilation changes hardware mode to 24-bit precision
   void set_24_bit_selection_and_mode(bool selection, bool mode) {
     _select_24_bit_instr = selection;
     _in_24_bit_fp_mode   = mode;
   }
   void  set_java_calls(int z) { _java_calls  = z; }
   void set_inner_loops(int z) { _inner_loops = z; }
   // Instruction bits passed off to the VM
   int               code_size()                 { return _method_size; }
   CodeBuffer*       code_buffer()               { return &_code_buffer; }
   int               first_block_size()          { return _first_block_size; }
   void              set_frame_complete(int off) { _code_offsets.set_value(CodeOffsets::Frame_Complete, off); }
   ExceptionHandlerTable*  handler_table()       { return &_handler_table; }
   ImplicitExceptionTable* inc_table()           { return &_inc_table; }
   OopMapSet*        oop_map_set()               { return _oop_map_set; }
   DebugInformationRecorder* debug_info()        { return env()->debug_info(); }
   Dependencies*     dependencies()              { return env()->dependencies(); }
   static int        CompiledZap_count()         { return _CompiledZap_count; }
   BufferBlob*       scratch_buffer_blob()       { return _scratch_buffer_blob; }
   void         init_scratch_buffer_blob(int const_size);
   void        clear_scratch_buffer_blob();
   void          set_scratch_buffer_blob(BufferBlob* b) { _scratch_buffer_blob = b; }
   relocInfo*        scratch_locs_memory()       { return _scratch_locs_memory; }
   void          set_scratch_locs_memory(relocInfo* b)  { _scratch_locs_memory = b; }
   // emit to scratch blob, report resulting size
   uint              scratch_emit_size(const Node* n);
   void       set_in_scratch_emit_size(bool x)   {        _in_scratch_emit_size = x; }
   bool           in_scratch_emit_size() const   { return _in_scratch_emit_size;     }
   enum ScratchBufferBlob {
     MAX_inst_size       = 1024,
     MAX_locs_size       = 128, // number of relocInfo elements
     MAX_const_size      = 128,
     MAX_stubs_size      = 128
   };
   // Major entry point.  Given a Scope, compile the associated method.
   // For normal compilations, entry_bci is InvocationEntryBci.  For on stack
   // replacement, entry_bci indicates the bytecode for which to compile a
   // continuation.
   Compile(ciEnv* ci_env, C2Compiler* compiler, ciMethod* target,
           int entry_bci, bool subsume_loads, bool do_escape_analysis,
           bool eliminate_boxing);
   // Second major entry point.  From the TypeFunc signature, generate code
   // to pass arguments from the Java calling convention to the C calling
   // convention.
   Compile(ciEnv* ci_env, const TypeFunc *(*gen)(),
           address stub_function, const char *stub_name,
           int is_fancy_jump, bool pass_tls,
           bool save_arg_registers, bool return_pc);
   // From the TypeFunc signature, generate code to pass arguments
   // from Compiled calling convention to Interpreter's calling convention
   void Generate_Compiled_To_Interpreter_Graph(const TypeFunc *tf, address interpreter_entry);
   // From the TypeFunc signature, generate code to pass arguments
   // from Interpreter's calling convention to Compiler's calling convention
   void Generate_Interpreter_To_Compiled_Graph(const TypeFunc *tf);
   // Are we compiling a method?
   bool has_method() { return method() != NULL; }
   // Maybe print some information about this compile.
   void print_compile_messages();
   // Final graph reshaping, a post-pass after the regular optimizer is done.
   bool final_graph_reshaping();
   // returns true if adr is completely contained in the given alias category
   bool must_alias(const TypePtr* adr, int alias_idx);
   // returns true if adr overlaps with the given alias category
   bool can_alias(const TypePtr* adr, int alias_idx);
   // Driver for converting compiler's IR into machine code bits
   void Output();
   // Accessors for node bundling info.
   Bundle* node_bundling(const Node *n);
   bool valid_bundle_info(const Node *n);
   // Schedule and Bundle the instructions
   void ScheduleAndBundle();
   // Build OopMaps for each GC point
   void BuildOopMaps();
   // Append debug info for the node "local" at safepoint node "sfpt" to the
   // "array",   May also consult and add to "objs", which describes the
   // scalar-replaced objects.
   void FillLocArray( int idx, MachSafePointNode* sfpt,
                      Node *local, GrowableArray<ScopeValue*> *array,
                      GrowableArray<ScopeValue*> *objs );
   // If "objs" contains an ObjectValue whose id is "id", returns it, else NULL.
   static ObjectValue* sv_for_node_id(GrowableArray<ScopeValue*> *objs, int id);
   // Requres that "objs" does not contains an ObjectValue whose id matches
   // that of "sv.  Appends "sv".
   static void set_sv_for_object_node(GrowableArray<ScopeValue*> *objs,
                                      ObjectValue* sv );
   // Process an OopMap Element while emitting nodes
   void Process_OopMap_Node(MachNode *mach, int code_offset);
   // Initialize code buffer
   CodeBuffer* init_buffer(uint* blk_starts);
   // Write out basic block data to code buffer
   void fill_buffer(CodeBuffer* cb, uint* blk_starts);
   // Determine which variable sized branches can be shortened
   void shorten_branches(uint* blk_starts, int& code_size, int& reloc_size, int& stub_size);
   // Compute the size of first NumberOfLoopInstrToAlign instructions
   // at the head of a loop.
   void compute_loop_first_inst_sizes();
   // Compute the information for the exception tables
   void FillExceptionTables(uint cnt, uint *call_returns, uint *inct_starts, Label *blk_labels);
   // Stack slots that may be unused by the calling convention but must
   // otherwise be preserved.  On Intel this includes the return address.
   // On PowerPC it includes the 4 words holding the old TOC & LR glue.
   uint in_preserve_stack_slots();
   // "Top of Stack" slots that may be unused by the calling convention but must
   // otherwise be preserved.
   // On Intel these are not necessary and the value can be zero.
   // On Sparc this describes the words reserved for storing a register window
   // when an interrupt occurs.
   static uint out_preserve_stack_slots();
   // Number of outgoing stack slots killed above the out_preserve_stack_slots
   // for calls to C.  Supports the var-args backing area for register parms.
   uint varargs_C_out_slots_killed() const;
   // Number of Stack Slots consumed by a synchronization entry
   int sync_stack_slots() const;
   // Compute the name of old_SP.  See <arch>.ad for frame layout.
   OptoReg::Name compute_old_SP();
 #ifdef ENABLE_ZAP_DEAD_LOCALS
   static bool is_node_getting_a_safepoint(Node*);
   void Insert_zap_nodes();
   Node* call_zap_node(MachSafePointNode* n, int block_no);
 #endif
  private:
   // Phase control:
   void Init(int aliaslevel);                     // Prepare for a single compilation
   int  Inline_Warm();                            // Find more inlining work.
   void Finish_Warm();                            // Give up on further inlines.
   void Optimize();                               // Given a graph, optimize it
   void Code_Gen();                               // Generate code from a graph
   // Management of the AliasType table.
   void grow_alias_types();
   AliasCacheEntry* probe_alias_cache(const TypePtr* adr_type);
   const TypePtr *flatten_alias_type(const TypePtr* adr_type) const;
   AliasType* find_alias_type(const TypePtr* adr_type, bool no_create, ciField* field);
   void verify_top(Node*) const PRODUCT_RETURN;
   // Intrinsic setup.
   void           register_library_intrinsics();                            // initializer
   CallGenerator* make_vm_intrinsic(ciMethod* m, bool is_virtual);          // constructor
   int            intrinsic_insertion_index(ciMethod* m, bool is_virtual);  // helper
   CallGenerator* find_intrinsic(ciMethod* m, bool is_virtual);             // query fn
   void           register_intrinsic(CallGenerator* cg);                    // update fn
 #ifndef PRODUCT
   static juint  _intrinsic_hist_count[vmIntrinsics::ID_LIMIT];
   static jubyte _intrinsic_hist_flags[vmIntrinsics::ID_LIMIT];
 #endif
   // Function calls made by the public function final_graph_reshaping.
   // No need to be made public as they are not called elsewhere.
   void final_graph_reshaping_impl( Node *n, Final_Reshape_Counts &frc);
   void final_graph_reshaping_walk( Node_Stack &nstack, Node *root, Final_Reshape_Counts &frc );
   void eliminate_redundant_card_marks(Node* n);
  public:
   // Note:  Histogram array size is about 1 Kb.
   enum {                        // flag bits:
     _intrinsic_worked = 1,      // succeeded at least once
     _intrinsic_failed = 2,      // tried it but it failed
     _intrinsic_disabled = 4,    // was requested but disabled (e.g., -XX:-InlineUnsafeOps)
     _intrinsic_virtual = 8,     // was seen in the virtual form (rare)
     _intrinsic_both = 16        // was seen in the non-virtual form (usual)
   };
   // Update histogram.  Return boolean if this is a first-time occurrence.
   static bool gather_intrinsic_statistics(vmIntrinsics::ID id,
                                           bool is_virtual, int flags) PRODUCT_RETURN0;
   static void print_intrinsic_statistics() PRODUCT_RETURN;
   // Graph verification code
   // Walk the node list, verifying that there is a one-to-one
   // correspondence between Use-Def edges and Def-Use edges
   // The option no_dead_code enables stronger checks that the
   // graph is strongly connected from root in both directions.
   void verify_graph_edges(bool no_dead_code = false) PRODUCT_RETURN;
   // Verify GC barrier patterns
   void verify_barriers() PRODUCT_RETURN;
   // End-of-run dumps.
   static void print_statistics() PRODUCT_RETURN;
   // Dump formatted assembly
   void dump_asm(int *pcs = NULL, uint pc_limit = 0) PRODUCT_RETURN;
   void dump_pc(int *pcs, int pc_limit, Node *n);
   // Verify ADLC assumptions during startup
   static void adlc_verification() PRODUCT_RETURN;
   // Definitions of pd methods
   static void pd_compiler2_init();
   // Auxiliary method for randomized fuzzing/stressing
   static bool randomized_select(int count);
 };
 #endif // SHARE_VM_OPTO_COMPILE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/opto/compile.hpp@04ff2f6cd0eb (annotated)

src/share/vm/opto/compile.hpp