jdk8-mips64-public/hotspot: src/share/vm/opto/callnode.hpp@f90c822e73f8 (annotated)

src/share/vm/opto/callnode.hpp@f90c822e73f8 (annotated)

src/share/vm/opto/callnode.hpp

Wed, 27 Apr 2016 01:25:04 +0800

author: aoqi
date: Wed, 27 Apr 2016 01:25:04 +0800
changeset 0: f90c822e73f8
child 6876: 710a3c8b516e
permissions: -rw-r--r--

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http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

 /*
  * Copyright (c) 1997, 2013, 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_CALLNODE_HPP
 #define SHARE_VM_OPTO_CALLNODE_HPP
 #include "opto/connode.hpp"
 #include "opto/mulnode.hpp"
 #include "opto/multnode.hpp"
 #include "opto/opcodes.hpp"
 #include "opto/phaseX.hpp"
 #include "opto/type.hpp"
 // Portions of code courtesy of Clifford Click
 // Optimization - Graph Style
 class Chaitin;
 class NamedCounter;
 class MultiNode;
 class  SafePointNode;
 class   CallNode;
 class     CallJavaNode;
 class       CallStaticJavaNode;
 class       CallDynamicJavaNode;
 class     CallRuntimeNode;
 class       CallLeafNode;
 class         CallLeafNoFPNode;
 class     AllocateNode;
 class       AllocateArrayNode;
 class     BoxLockNode;
 class     LockNode;
 class     UnlockNode;
 class JVMState;
 class OopMap;
 class State;
 class StartNode;
 class MachCallNode;
 class FastLockNode;
 //------------------------------StartNode--------------------------------------
 // The method start node
 class StartNode : public MultiNode {
   virtual uint cmp( const Node &n ) const;
   virtual uint size_of() const; // Size is bigger
 public:
   const TypeTuple *_domain;
   StartNode( Node *root, const TypeTuple *domain ) : MultiNode(2), _domain(domain) {
     init_class_id(Class_Start);
     init_req(0,this);
     init_req(1,root);
   }
   virtual int Opcode() const;
   virtual bool pinned() const { return true; };
   virtual const Type *bottom_type() const;
   virtual const TypePtr *adr_type() const { return TypePtr::BOTTOM; }
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual void  calling_convention( BasicType* sig_bt, VMRegPair *parm_reg, uint length ) const;
   virtual const RegMask &in_RegMask(uint) const;
   virtual Node *match( const ProjNode *proj, const Matcher *m );
   virtual uint ideal_reg() const { return 0; }
 #ifndef PRODUCT
   virtual void  dump_spec(outputStream *st) const;
 #endif
 };
 //------------------------------StartOSRNode-----------------------------------
 // The method start node for on stack replacement code
 class StartOSRNode : public StartNode {
 public:
   StartOSRNode( Node *root, const TypeTuple *domain ) : StartNode(root, domain) {}
   virtual int   Opcode() const;
   static  const TypeTuple *osr_domain();
 };
 //------------------------------ParmNode---------------------------------------
 // Incoming parameters
 class ParmNode : public ProjNode {
   static const char * const names[TypeFunc::Parms+1];
 public:
   ParmNode( StartNode *src, uint con ) : ProjNode(src,con) {
     init_class_id(Class_Parm);
   }
   virtual int Opcode() const;
   virtual bool  is_CFG() const { return (_con == TypeFunc::Control); }
   virtual uint ideal_reg() const;
 #ifndef PRODUCT
   virtual void dump_spec(outputStream *st) const;
 #endif
 };
 //------------------------------ReturnNode-------------------------------------
 // Return from subroutine node
 class ReturnNode : public Node {
 public:
   ReturnNode( uint edges, Node *cntrl, Node *i_o, Node *memory, Node *retadr, Node *frameptr );
   virtual int Opcode() const;
   virtual bool  is_CFG() const { return true; }
   virtual uint hash() const { return NO_HASH; }  // CFG nodes do not hash
   virtual bool depends_only_on_test() const { return false; }
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual uint ideal_reg() const { return NotAMachineReg; }
   virtual uint match_edge(uint idx) const;
 #ifndef PRODUCT
   virtual void dump_req(outputStream *st = tty) const;
 #endif
 };
 //------------------------------RethrowNode------------------------------------
 // Rethrow of exception at call site.  Ends a procedure before rethrowing;
 // ends the current basic block like a ReturnNode.  Restores registers and
 // unwinds stack.  Rethrow happens in the caller's method.
 class RethrowNode : public Node {
  public:
   RethrowNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *ret_adr, Node *exception );
   virtual int Opcode() const;
   virtual bool  is_CFG() const { return true; }
   virtual uint hash() const { return NO_HASH; }  // CFG nodes do not hash
   virtual bool depends_only_on_test() const { return false; }
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual uint match_edge(uint idx) const;
   virtual uint ideal_reg() const { return NotAMachineReg; }
 #ifndef PRODUCT
   virtual void dump_req(outputStream *st = tty) const;
 #endif
 };
 //------------------------------TailCallNode-----------------------------------
 // Pop stack frame and jump indirect
 class TailCallNode : public ReturnNode {
 public:
   TailCallNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *retadr, Node *target, Node *moop )
     : ReturnNode( TypeFunc::Parms+2, cntrl, i_o, memory, frameptr, retadr ) {
     init_req(TypeFunc::Parms, target);
     init_req(TypeFunc::Parms+1, moop);
   }
   virtual int Opcode() const;
   virtual uint match_edge(uint idx) const;
 };
 //------------------------------TailJumpNode-----------------------------------
 // Pop stack frame and jump indirect
 class TailJumpNode : public ReturnNode {
 public:
   TailJumpNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *target, Node *ex_oop)
     : ReturnNode(TypeFunc::Parms+2, cntrl, i_o, memory, frameptr, Compile::current()->top()) {
     init_req(TypeFunc::Parms, target);
     init_req(TypeFunc::Parms+1, ex_oop);
   }
   virtual int Opcode() const;
   virtual uint match_edge(uint idx) const;
 };
 //-------------------------------JVMState-------------------------------------
 // A linked list of JVMState nodes captures the whole interpreter state,
 // plus GC roots, for all active calls at some call site in this compilation
 // unit.  (If there is no inlining, then the list has exactly one link.)
 // This provides a way to map the optimized program back into the interpreter,
 // or to let the GC mark the stack.
 class JVMState : public ResourceObj {
   friend class VMStructs;
 public:
   typedef enum {
     Reexecute_Undefined = -1, // not defined -- will be translated into false later
     Reexecute_False     =  0, // false       -- do not reexecute
     Reexecute_True      =  1  // true        -- reexecute the bytecode
   } ReexecuteState; //Reexecute State
 private:
   JVMState*         _caller;    // List pointer for forming scope chains
   uint              _depth;     // One more than caller depth, or one.
   uint              _locoff;    // Offset to locals in input edge mapping
   uint              _stkoff;    // Offset to stack in input edge mapping
   uint              _monoff;    // Offset to monitors in input edge mapping
   uint              _scloff;    // Offset to fields of scalar objs in input edge mapping
   uint              _endoff;    // Offset to end of input edge mapping
   uint              _sp;        // Jave Expression Stack Pointer for this state
   int               _bci;       // Byte Code Index of this JVM point
   ReexecuteState    _reexecute; // Whether this bytecode need to be re-executed
   ciMethod*         _method;    // Method Pointer
   SafePointNode*    _map;       // Map node associated with this scope
 public:
   friend class Compile;
   friend class PreserveReexecuteState;
   // Because JVMState objects live over the entire lifetime of the
   // Compile object, they are allocated into the comp_arena, which
   // does not get resource marked or reset during the compile process
   void *operator new( size_t x, Compile* C ) throw() { return C->comp_arena()->Amalloc(x); }
   void operator delete( void * ) { } // fast deallocation
   // Create a new JVMState, ready for abstract interpretation.
   JVMState(ciMethod* method, JVMState* caller);
   JVMState(int stack_size);  // root state; has a null method
   // Access functions for the JVM
   // ... --|--- loc ---|--- stk ---|--- arg ---|--- mon ---|--- scl ---|
   //       \ locoff    \ stkoff    \ argoff    \ monoff    \ scloff    \ endoff
   uint              locoff() const { return _locoff; }
   uint              stkoff() const { return _stkoff; }
   uint              argoff() const { return _stkoff + _sp; }
   uint              monoff() const { return _monoff; }
   uint              scloff() const { return _scloff; }
   uint              endoff() const { return _endoff; }
   uint              oopoff() const { return debug_end(); }
   int            loc_size() const { return stkoff() - locoff(); }
   int            stk_size() const { return monoff() - stkoff(); }
   int            mon_size() const { return scloff() - monoff(); }
   int            scl_size() const { return endoff() - scloff(); }
   bool        is_loc(uint i) const { return locoff() <= i && i < stkoff(); }
   bool        is_stk(uint i) const { return stkoff() <= i && i < monoff(); }
   bool        is_mon(uint i) const { return monoff() <= i && i < scloff(); }
   bool        is_scl(uint i) const { return scloff() <= i && i < endoff(); }
   uint                      sp() const { return _sp; }
   int                      bci() const { return _bci; }
   bool        should_reexecute() const { return _reexecute==Reexecute_True; }
   bool  is_reexecute_undefined() const { return _reexecute==Reexecute_Undefined; }
   bool              has_method() const { return _method != NULL; }
   ciMethod*             method() const { assert(has_method(), ""); return _method; }
   JVMState*             caller() const { return _caller; }
   SafePointNode*           map() const { return _map; }
   uint                   depth() const { return _depth; }
   uint             debug_start() const; // returns locoff of root caller
   uint               debug_end() const; // returns endoff of self
   uint              debug_size() const {
     return loc_size() + sp() + mon_size() + scl_size();
   }
   uint        debug_depth()  const; // returns sum of debug_size values at all depths
   // Returns the JVM state at the desired depth (1 == root).
   JVMState* of_depth(int d) const;
   // Tells if two JVM states have the same call chain (depth, methods, & bcis).
   bool same_calls_as(const JVMState* that) const;
   // Monitors (monitors are stored as (boxNode, objNode) pairs
   enum { logMonitorEdges = 1 };
   int  nof_monitors()              const { return mon_size() >> logMonitorEdges; }
   int  monitor_depth()             const { return nof_monitors() + (caller() ? caller()->monitor_depth() : 0); }
   int  monitor_box_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 0; }
   int  monitor_obj_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 1; }
   bool is_monitor_box(uint off)    const {
     assert(is_mon(off), "should be called only for monitor edge");
     return (0 == bitfield(off - monoff(), 0, logMonitorEdges));
   }
   bool is_monitor_use(uint off)    const { return (is_mon(off)
                                                    && is_monitor_box(off))
                                              || (caller() && caller()->is_monitor_use(off)); }
   // Initialization functions for the JVM
   void              set_locoff(uint off) { _locoff = off; }
   void              set_stkoff(uint off) { _stkoff = off; }
   void              set_monoff(uint off) { _monoff = off; }
   void              set_scloff(uint off) { _scloff = off; }
   void              set_endoff(uint off) { _endoff = off; }
   void              set_offsets(uint off) {
     _locoff = _stkoff = _monoff = _scloff = _endoff = off;
   }
   void              set_map(SafePointNode *map) { _map = map; }
   void              set_sp(uint sp) { _sp = sp; }
                     // _reexecute is initialized to "undefined" for a new bci
   void              set_bci(int bci) {if(_bci != bci)_reexecute=Reexecute_Undefined; _bci = bci; }
   void              set_should_reexecute(bool reexec) {_reexecute = reexec ? Reexecute_True : Reexecute_False;}
   // Miscellaneous utility functions
   JVMState* clone_deep(Compile* C) const;    // recursively clones caller chain
   JVMState* clone_shallow(Compile* C) const; // retains uncloned caller
   void      set_map_deep(SafePointNode *map);// reset map for all callers
   void      adapt_position(int delta);       // Adapt offsets in in-array after adding an edge.
   int       interpreter_frame_size() const;
 #ifndef PRODUCT
   void      format(PhaseRegAlloc *regalloc, const Node *n, outputStream* st) const;
   void      dump_spec(outputStream *st) const;
   void      dump_on(outputStream* st) const;
   void      dump() const {
     dump_on(tty);
   }
 #endif
 };
 //------------------------------SafePointNode----------------------------------
 // A SafePointNode is a subclass of a MultiNode for convenience (and
 // potential code sharing) only - conceptually it is independent of
 // the Node semantics.
 class SafePointNode : public MultiNode {
   virtual uint           cmp( const Node &n ) const;
   virtual uint           size_of() const;       // Size is bigger
 public:
   SafePointNode(uint edges, JVMState* jvms,
                 // A plain safepoint advertises no memory effects (NULL):
                 const TypePtr* adr_type = NULL)
     : MultiNode( edges ),
       _jvms(jvms),
       _oop_map(NULL),
       _adr_type(adr_type)
   {
     init_class_id(Class_SafePoint);
   }
   OopMap*         _oop_map;   // Array of OopMap info (8-bit char) for GC
   JVMState* const _jvms;      // Pointer to list of JVM State objects
   const TypePtr*  _adr_type;  // What type of memory does this node produce?
   // Many calls take *all* of memory as input,
   // but some produce a limited subset of that memory as output.
   // The adr_type reports the call's behavior as a store, not a load.
   virtual JVMState* jvms() const { return _jvms; }
   void set_jvms(JVMState* s) {
     *(JVMState**)&_jvms = s;  // override const attribute in the accessor
   }
   OopMap *oop_map() const { return _oop_map; }
   void set_oop_map(OopMap *om) { _oop_map = om; }
  private:
   void verify_input(JVMState* jvms, uint idx) const {
     assert(verify_jvms(jvms), "jvms must match");
     Node* n = in(idx);
     assert((!n->bottom_type()->isa_long() && !n->bottom_type()->isa_double()) ||
            in(idx + 1)->is_top(), "2nd half of long/double");
   }
  public:
   // Functionality from old debug nodes which has changed
   Node *local(JVMState* jvms, uint idx) const {
     verify_input(jvms, jvms->locoff() + idx);
     return in(jvms->locoff() + idx);
   }
   Node *stack(JVMState* jvms, uint idx) const {
     verify_input(jvms, jvms->stkoff() + idx);
     return in(jvms->stkoff() + idx);
   }
   Node *argument(JVMState* jvms, uint idx) const {
     verify_input(jvms, jvms->argoff() + idx);
     return in(jvms->argoff() + idx);
   }
   Node *monitor_box(JVMState* jvms, uint idx) const {
     assert(verify_jvms(jvms), "jvms must match");
     return in(jvms->monitor_box_offset(idx));
   }
   Node *monitor_obj(JVMState* jvms, uint idx) const {
     assert(verify_jvms(jvms), "jvms must match");
     return in(jvms->monitor_obj_offset(idx));
   }
   void  set_local(JVMState* jvms, uint idx, Node *c);
   void  set_stack(JVMState* jvms, uint idx, Node *c) {
     assert(verify_jvms(jvms), "jvms must match");
     set_req(jvms->stkoff() + idx, c);
   }
   void  set_argument(JVMState* jvms, uint idx, Node *c) {
     assert(verify_jvms(jvms), "jvms must match");
     set_req(jvms->argoff() + idx, c);
   }
   void ensure_stack(JVMState* jvms, uint stk_size) {
     assert(verify_jvms(jvms), "jvms must match");
     int grow_by = (int)stk_size - (int)jvms->stk_size();
     if (grow_by > 0)  grow_stack(jvms, grow_by);
   }
   void grow_stack(JVMState* jvms, uint grow_by);
   // Handle monitor stack
   void push_monitor( const FastLockNode *lock );
   void pop_monitor ();
   Node *peek_monitor_box() const;
   Node *peek_monitor_obj() const;
   // Access functions for the JVM
   Node *control  () const { return in(TypeFunc::Control  ); }
   Node *i_o      () const { return in(TypeFunc::I_O      ); }
   Node *memory   () const { return in(TypeFunc::Memory   ); }
   Node *returnadr() const { return in(TypeFunc::ReturnAdr); }
   Node *frameptr () const { return in(TypeFunc::FramePtr ); }
   void set_control  ( Node *c ) { set_req(TypeFunc::Control,c); }
   void set_i_o      ( Node *c ) { set_req(TypeFunc::I_O    ,c); }
   void set_memory   ( Node *c ) { set_req(TypeFunc::Memory ,c); }
   MergeMemNode* merged_memory() const {
     return in(TypeFunc::Memory)->as_MergeMem();
   }
   // The parser marks useless maps as dead when it's done with them:
   bool is_killed() { return in(TypeFunc::Control) == NULL; }
   // Exception states bubbling out of subgraphs such as inlined calls
   // are recorded here.  (There might be more than one, hence the "next".)
   // This feature is used only for safepoints which serve as "maps"
   // for JVM states during parsing, intrinsic expansion, etc.
   SafePointNode*         next_exception() const;
   void               set_next_exception(SafePointNode* n);
   bool                   has_exceptions() const { return next_exception() != NULL; }
   // Standard Node stuff
   virtual int            Opcode() const;
   virtual bool           pinned() const { return true; }
   virtual const Type    *Value( PhaseTransform *phase ) const;
   virtual const Type    *bottom_type() const { return Type::CONTROL; }
   virtual const TypePtr *adr_type() const { return _adr_type; }
   virtual Node          *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual Node          *Identity( PhaseTransform *phase );
   virtual uint           ideal_reg() const { return 0; }
   virtual const RegMask &in_RegMask(uint) const;
   virtual const RegMask &out_RegMask() const;
   virtual uint           match_edge(uint idx) const;
   static  bool           needs_polling_address_input();
 #ifndef PRODUCT
   virtual void           dump_spec(outputStream *st) const;
 #endif
 };
 //------------------------------SafePointScalarObjectNode----------------------
 // A SafePointScalarObjectNode represents the state of a scalarized object
 // at a safepoint.
 class SafePointScalarObjectNode: public TypeNode {
   uint _first_index; // First input edge relative index of a SafePoint node where
                      // states of the scalarized object fields are collected.
                      // It is relative to the last (youngest) jvms->_scloff.
   uint _n_fields;    // Number of non-static fields of the scalarized object.
   DEBUG_ONLY(AllocateNode* _alloc;)
   virtual uint hash() const ; // { return NO_HASH; }
   virtual uint cmp( const Node &n ) const;
   uint first_index() const { return _first_index; }
 public:
   SafePointScalarObjectNode(const TypeOopPtr* tp,
 #ifdef ASSERT
                             AllocateNode* alloc,
 #endif
                             uint first_index, uint n_fields);
   virtual int Opcode() const;
   virtual uint           ideal_reg() const;
   virtual const RegMask &in_RegMask(uint) const;
   virtual const RegMask &out_RegMask() const;
   virtual uint           match_edge(uint idx) const;
   uint first_index(JVMState* jvms) const {
     assert(jvms != NULL, "missed JVMS");
     return jvms->scloff() + _first_index;
   }
   uint n_fields()    const { return _n_fields; }
 #ifdef ASSERT
   AllocateNode* alloc() const { return _alloc; }
 #endif
   virtual uint size_of() const { return sizeof(*this); }
   // Assumes that "this" is an argument to a safepoint node "s", and that
   // "new_call" is being created to correspond to "s".  But the difference
   // between the start index of the jvmstates of "new_call" and "s" is
   // "jvms_adj".  Produce and return a SafePointScalarObjectNode that
   // corresponds appropriately to "this" in "new_call".  Assumes that
   // "sosn_map" is a map, specific to the translation of "s" to "new_call",
   // mapping old SafePointScalarObjectNodes to new, to avoid multiple copies.
   SafePointScalarObjectNode* clone(Dict* sosn_map) const;
 #ifndef PRODUCT
   virtual void              dump_spec(outputStream *st) const;
 #endif
 };
 // Simple container for the outgoing projections of a call.  Useful
 // for serious surgery on calls.
 class CallProjections : public StackObj {
 public:
   Node* fallthrough_proj;
   Node* fallthrough_catchproj;
   Node* fallthrough_memproj;
   Node* fallthrough_ioproj;
   Node* catchall_catchproj;
   Node* catchall_memproj;
   Node* catchall_ioproj;
   Node* resproj;
   Node* exobj;
 };
 class CallGenerator;
 //------------------------------CallNode---------------------------------------
 // Call nodes now subsume the function of debug nodes at callsites, so they
 // contain the functionality of a full scope chain of debug nodes.
 class CallNode : public SafePointNode {
   friend class VMStructs;
 public:
   const TypeFunc *_tf;        // Function type
   address      _entry_point;  // Address of method being called
   float        _cnt;          // Estimate of number of times called
   CallGenerator* _generator;  // corresponding CallGenerator for some late inline calls
   CallNode(const TypeFunc* tf, address addr, const TypePtr* adr_type)
     : SafePointNode(tf->domain()->cnt(), NULL, adr_type),
       _tf(tf),
       _entry_point(addr),
       _cnt(COUNT_UNKNOWN),
       _generator(NULL)
   {
     init_class_id(Class_Call);
   }
   const TypeFunc* tf()         const { return _tf; }
   const address  entry_point() const { return _entry_point; }
   const float    cnt()         const { return _cnt; }
   CallGenerator* generator()   const { return _generator; }
   void set_tf(const TypeFunc* tf)       { _tf = tf; }
   void set_entry_point(address p)       { _entry_point = p; }
   void set_cnt(float c)                 { _cnt = c; }
   void set_generator(CallGenerator* cg) { _generator = cg; }
   virtual const Type *bottom_type() const;
   virtual const Type *Value( PhaseTransform *phase ) const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   virtual Node *Identity( PhaseTransform *phase ) { return this; }
   virtual uint        cmp( const Node &n ) const;
   virtual uint        size_of() const = 0;
   virtual void        calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const;
   virtual Node       *match( const ProjNode *proj, const Matcher *m );
   virtual uint        ideal_reg() const { return NotAMachineReg; }
   // Are we guaranteed that this node is a safepoint?  Not true for leaf calls and
   // for some macro nodes whose expansion does not have a safepoint on the fast path.
   virtual bool        guaranteed_safepoint()  { return true; }
   // For macro nodes, the JVMState gets modified during expansion. If calls
   // use MachConstantBase, it gets modified during matching. So when cloning
   // the node the JVMState must be cloned. Default is not to clone.
   virtual void clone_jvms(Compile* C) {
     if (C->needs_clone_jvms() && jvms() != NULL) {
       set_jvms(jvms()->clone_deep(C));
       jvms()->set_map_deep(this);
     }
   }
   // Returns true if the call may modify n
   virtual bool        may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase);
   // Does this node have a use of n other than in debug information?
   bool                has_non_debug_use(Node *n);
   // Returns the unique CheckCastPP of a call
   // or result projection is there are several CheckCastPP
   // or returns NULL if there is no one.
   Node *result_cast();
   // Does this node returns pointer?
   bool returns_pointer() const {
     const TypeTuple *r = tf()->range();
     return (r->cnt() > TypeFunc::Parms &&
             r->field_at(TypeFunc::Parms)->isa_ptr());
   }
   // Collect all the interesting edges from a call for use in
   // replacing the call by something else.  Used by macro expansion
   // and the late inlining support.
   void extract_projections(CallProjections* projs, bool separate_io_proj);
   virtual uint match_edge(uint idx) const;
 #ifndef PRODUCT
   virtual void        dump_req(outputStream *st = tty) const;
   virtual void        dump_spec(outputStream *st) const;
 #endif
 };
 //------------------------------CallJavaNode-----------------------------------
 // Make a static or dynamic subroutine call node using Java calling
 // convention.  (The "Java" calling convention is the compiler's calling
 // convention, as opposed to the interpreter's or that of native C.)
 class CallJavaNode : public CallNode {
   friend class VMStructs;
 protected:
   virtual uint cmp( const Node &n ) const;
   virtual uint size_of() const; // Size is bigger
   bool    _optimized_virtual;
   bool    _method_handle_invoke;
   ciMethod* _method;            // Method being direct called
 public:
   const int       _bci;         // Byte Code Index of call byte code
   CallJavaNode(const TypeFunc* tf , address addr, ciMethod* method, int bci)
     : CallNode(tf, addr, TypePtr::BOTTOM),
       _method(method), _bci(bci),
       _optimized_virtual(false),
       _method_handle_invoke(false)
   {
     init_class_id(Class_CallJava);
   }
   virtual int   Opcode() const;
   ciMethod* method() const                { return _method; }
   void  set_method(ciMethod *m)           { _method = m; }
   void  set_optimized_virtual(bool f)     { _optimized_virtual = f; }
   bool  is_optimized_virtual() const      { return _optimized_virtual; }
   void  set_method_handle_invoke(bool f)  { _method_handle_invoke = f; }
   bool  is_method_handle_invoke() const   { return _method_handle_invoke; }
 #ifndef PRODUCT
   virtual void  dump_spec(outputStream *st) const;
 #endif
 };
 //------------------------------CallStaticJavaNode-----------------------------
 // Make a direct subroutine call using Java calling convention (for static
 // calls and optimized virtual calls, plus calls to wrappers for run-time
 // routines); generates static stub.
 class CallStaticJavaNode : public CallJavaNode {
   virtual uint cmp( const Node &n ) const;
   virtual uint size_of() const; // Size is bigger
 public:
   CallStaticJavaNode(Compile* C, const TypeFunc* tf, address addr, ciMethod* method, int bci)
     : CallJavaNode(tf, addr, method, bci), _name(NULL) {
     init_class_id(Class_CallStaticJava);
     if (C->eliminate_boxing() && (method != NULL) && method->is_boxing_method()) {
       init_flags(Flag_is_macro);
       C->add_macro_node(this);
     }
     _is_scalar_replaceable = false;
     _is_non_escaping = false;
   }
   CallStaticJavaNode(const TypeFunc* tf, address addr, const char* name, int bci,
                      const TypePtr* adr_type)
     : CallJavaNode(tf, addr, NULL, bci), _name(name) {
     init_class_id(Class_CallStaticJava);
     // This node calls a runtime stub, which often has narrow memory effects.
     _adr_type = adr_type;
     _is_scalar_replaceable = false;
     _is_non_escaping = false;
   }
   const char *_name;      // Runtime wrapper name
   // Result of Escape Analysis
   bool _is_scalar_replaceable;
   bool _is_non_escaping;
   // If this is an uncommon trap, return the request code, else zero.
   int uncommon_trap_request() const;
   static int extract_uncommon_trap_request(const Node* call);
   bool is_boxing_method() const {
     return is_macro() && (method() != NULL) && method()->is_boxing_method();
   }
   // Later inlining modifies the JVMState, so we need to clone it
   // when the call node is cloned (because it is macro node).
   virtual void  clone_jvms(Compile* C) {
     if ((jvms() != NULL) && is_boxing_method()) {
       set_jvms(jvms()->clone_deep(C));
       jvms()->set_map_deep(this);
     }
   }
   virtual int         Opcode() const;
 #ifndef PRODUCT
   virtual void        dump_spec(outputStream *st) const;
 #endif
 };
 //------------------------------CallDynamicJavaNode----------------------------
 // Make a dispatched call using Java calling convention.
 class CallDynamicJavaNode : public CallJavaNode {
   virtual uint cmp( const Node &n ) const;
   virtual uint size_of() const; // Size is bigger
 public:
   CallDynamicJavaNode( const TypeFunc *tf , address addr, ciMethod* method, int vtable_index, int bci ) : CallJavaNode(tf,addr,method,bci), _vtable_index(vtable_index) {
     init_class_id(Class_CallDynamicJava);
   }
   int _vtable_index;
   virtual int   Opcode() const;
 #ifndef PRODUCT
   virtual void  dump_spec(outputStream *st) const;
 #endif
 };
 //------------------------------CallRuntimeNode--------------------------------
 // Make a direct subroutine call node into compiled C++ code.
 class CallRuntimeNode : public CallNode {
   virtual uint cmp( const Node &n ) const;
   virtual uint size_of() const; // Size is bigger
 public:
   CallRuntimeNode(const TypeFunc* tf, address addr, const char* name,
                   const TypePtr* adr_type)
     : CallNode(tf, addr, adr_type),
       _name(name)
   {
     init_class_id(Class_CallRuntime);
   }
   const char *_name;            // Printable name, if _method is NULL
   virtual int   Opcode() const;
   virtual void  calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const;
 #ifndef PRODUCT
   virtual void  dump_spec(outputStream *st) const;
 #endif
 };
 //------------------------------CallLeafNode-----------------------------------
 // Make a direct subroutine call node into compiled C++ code, without
 // safepoints
 class CallLeafNode : public CallRuntimeNode {
 public:
   CallLeafNode(const TypeFunc* tf, address addr, const char* name,
                const TypePtr* adr_type)
     : CallRuntimeNode(tf, addr, name, adr_type)
   {
     init_class_id(Class_CallLeaf);
   }
   virtual int   Opcode() const;
   virtual bool        guaranteed_safepoint()  { return false; }
 #ifndef PRODUCT
   virtual void  dump_spec(outputStream *st) const;
 #endif
 };
 //------------------------------CallLeafNoFPNode-------------------------------
 // CallLeafNode, not using floating point or using it in the same manner as
 // the generated code
 class CallLeafNoFPNode : public CallLeafNode {
 public:
   CallLeafNoFPNode(const TypeFunc* tf, address addr, const char* name,
                    const TypePtr* adr_type)
     : CallLeafNode(tf, addr, name, adr_type)
   {
   }
   virtual int   Opcode() const;
 };
 //------------------------------Allocate---------------------------------------
 // High-level memory allocation
 //
 //  AllocateNode and AllocateArrayNode are subclasses of CallNode because they will
 //  get expanded into a code sequence containing a call.  Unlike other CallNodes,
 //  they have 2 memory projections and 2 i_o projections (which are distinguished by
 //  the _is_io_use flag in the projection.)  This is needed when expanding the node in
 //  order to differentiate the uses of the projection on the normal control path from
 //  those on the exception return path.
 //
 class AllocateNode : public CallNode {
 public:
   enum {
     // Output:
     RawAddress  = TypeFunc::Parms,    // the newly-allocated raw address
     // Inputs:
     AllocSize   = TypeFunc::Parms,    // size (in bytes) of the new object
     KlassNode,                        // type (maybe dynamic) of the obj.
     InitialTest,                      // slow-path test (may be constant)
     ALength,                          // array length (or TOP if none)
     ParmLimit
   };
   static const TypeFunc* alloc_type(const Type* t) {
     const Type** fields = TypeTuple::fields(ParmLimit - TypeFunc::Parms);
     fields[AllocSize]   = TypeInt::POS;
     fields[KlassNode]   = TypeInstPtr::NOTNULL;
     fields[InitialTest] = TypeInt::BOOL;
     fields[ALength]     = t;  // length (can be a bad length)
     const TypeTuple *domain = TypeTuple::make(ParmLimit, fields);
     // create result type (range)
     fields = TypeTuple::fields(1);
     fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
     const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
     return TypeFunc::make(domain, range);
   }
   // Result of Escape Analysis
   bool _is_scalar_replaceable;
   bool _is_non_escaping;
   virtual uint size_of() const; // Size is bigger
   AllocateNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio,
                Node *size, Node *klass_node, Node *initial_test);
   // Expansion modifies the JVMState, so we need to clone it
   virtual void  clone_jvms(Compile* C) {
     if (jvms() != NULL) {
       set_jvms(jvms()->clone_deep(C));
       jvms()->set_map_deep(this);
     }
   }
   virtual int Opcode() const;
   virtual uint ideal_reg() const { return Op_RegP; }
   virtual bool        guaranteed_safepoint()  { return false; }
   // allocations do not modify their arguments
   virtual bool        may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase) { return false;}
   // Pattern-match a possible usage of AllocateNode.
   // Return null if no allocation is recognized.
   // The operand is the pointer produced by the (possible) allocation.
   // It must be a projection of the Allocate or its subsequent CastPP.
   // (Note:  This function is defined in file graphKit.cpp, near
   // GraphKit::new_instance/new_array, whose output it recognizes.)
   // The 'ptr' may not have an offset unless the 'offset' argument is given.
   static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase);
   // Fancy version which uses AddPNode::Ideal_base_and_offset to strip
   // an offset, which is reported back to the caller.
   // (Note:  AllocateNode::Ideal_allocation is defined in graphKit.cpp.)
   static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase,
                                         intptr_t& offset);
   // Dig the klass operand out of a (possible) allocation site.
   static Node* Ideal_klass(Node* ptr, PhaseTransform* phase) {
     AllocateNode* allo = Ideal_allocation(ptr, phase);
     return (allo == NULL) ? NULL : allo->in(KlassNode);
   }
   // Conservatively small estimate of offset of first non-header byte.
   int minimum_header_size() {
     return is_AllocateArray() ? arrayOopDesc::base_offset_in_bytes(T_BYTE) :
                                 instanceOopDesc::base_offset_in_bytes();
   }
   // Return the corresponding initialization barrier (or null if none).
   // Walks out edges to find it...
   // (Note: Both InitializeNode::allocation and AllocateNode::initialization
   // are defined in graphKit.cpp, which sets up the bidirectional relation.)
   InitializeNode* initialization();
   // Convenience for initialization->maybe_set_complete(phase)
   bool maybe_set_complete(PhaseGVN* phase);
 };
 //------------------------------AllocateArray---------------------------------
 //
 // High-level array allocation
 //
 class AllocateArrayNode : public AllocateNode {
 public:
   AllocateArrayNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio,
                     Node* size, Node* klass_node, Node* initial_test,
                     Node* count_val
                     )
     : AllocateNode(C, atype, ctrl, mem, abio, size, klass_node,
                    initial_test)
   {
     init_class_id(Class_AllocateArray);
     set_req(AllocateNode::ALength,        count_val);
   }
   virtual int Opcode() const;
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   // Dig the length operand out of a array allocation site.
   Node* Ideal_length() {
     return in(AllocateNode::ALength);
   }
   // Dig the length operand out of a array allocation site and narrow the
   // type with a CastII, if necesssary
   Node* make_ideal_length(const TypeOopPtr* ary_type, PhaseTransform *phase, bool can_create = true);
   // Pattern-match a possible usage of AllocateArrayNode.
   // Return null if no allocation is recognized.
   static AllocateArrayNode* Ideal_array_allocation(Node* ptr, PhaseTransform* phase) {
     AllocateNode* allo = Ideal_allocation(ptr, phase);
     return (allo == NULL || !allo->is_AllocateArray())
            ? NULL : allo->as_AllocateArray();
   }
 };
 //------------------------------AbstractLockNode-----------------------------------
 class AbstractLockNode: public CallNode {
 private:
   enum {
     Regular = 0,  // Normal lock
     NonEscObj,    // Lock is used for non escaping object
     Coarsened,    // Lock was coarsened
     Nested        // Nested lock
   } _kind;
 #ifndef PRODUCT
   NamedCounter* _counter;
 #endif
 protected:
   // helper functions for lock elimination
   //
   bool find_matching_unlock(const Node* ctrl, LockNode* lock,
                             GrowableArray<AbstractLockNode*> &lock_ops);
   bool find_lock_and_unlock_through_if(Node* node, LockNode* lock,
                                        GrowableArray<AbstractLockNode*> &lock_ops);
   bool find_unlocks_for_region(const RegionNode* region, LockNode* lock,
                                GrowableArray<AbstractLockNode*> &lock_ops);
   LockNode *find_matching_lock(UnlockNode* unlock);
   // Update the counter to indicate that this lock was eliminated.
   void set_eliminated_lock_counter() PRODUCT_RETURN;
 public:
   AbstractLockNode(const TypeFunc *tf)
     : CallNode(tf, NULL, TypeRawPtr::BOTTOM),
       _kind(Regular)
   {
 #ifndef PRODUCT
     _counter = NULL;
 #endif
   }
   virtual int Opcode() const = 0;
   Node *   obj_node() const       {return in(TypeFunc::Parms + 0); }
   Node *   box_node() const       {return in(TypeFunc::Parms + 1); }
   Node *   fastlock_node() const  {return in(TypeFunc::Parms + 2); }
   void     set_box_node(Node* box) { set_req(TypeFunc::Parms + 1, box); }
   const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;}
   virtual uint size_of() const { return sizeof(*this); }
   bool is_eliminated()  const { return (_kind != Regular); }
   bool is_non_esc_obj() const { return (_kind == NonEscObj); }
   bool is_coarsened()   const { return (_kind == Coarsened); }
   bool is_nested()      const { return (_kind == Nested); }
   void set_non_esc_obj() { _kind = NonEscObj; set_eliminated_lock_counter(); }
   void set_coarsened()   { _kind = Coarsened; set_eliminated_lock_counter(); }
   void set_nested()      { _kind = Nested; set_eliminated_lock_counter(); }
   // locking does not modify its arguments
   virtual bool may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase){ return false;}
 #ifndef PRODUCT
   void create_lock_counter(JVMState* s);
   NamedCounter* counter() const { return _counter; }
 #endif
 };
 //------------------------------Lock---------------------------------------
 // High-level lock operation
 //
 // This is a subclass of CallNode because it is a macro node which gets expanded
 // into a code sequence containing a call.  This node takes 3 "parameters":
 //    0  -  object to lock
 //    1 -   a BoxLockNode
 //    2 -   a FastLockNode
 //
 class LockNode : public AbstractLockNode {
 public:
   static const TypeFunc *lock_type() {
     // create input type (domain)
     const Type **fields = TypeTuple::fields(3);
     fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL;  // Object to be Locked
     fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM;    // Address of stack location for lock
     fields[TypeFunc::Parms+2] = TypeInt::BOOL;         // FastLock
     const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+3,fields);
     // create result type (range)
     fields = TypeTuple::fields(0);
     const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
     return TypeFunc::make(domain,range);
   }
   virtual int Opcode() const;
   virtual uint size_of() const; // Size is bigger
   LockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) {
     init_class_id(Class_Lock);
     init_flags(Flag_is_macro);
     C->add_macro_node(this);
   }
   virtual bool        guaranteed_safepoint()  { return false; }
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   // Expansion modifies the JVMState, so we need to clone it
   virtual void  clone_jvms(Compile* C) {
     if (jvms() != NULL) {
       set_jvms(jvms()->clone_deep(C));
       jvms()->set_map_deep(this);
     }
   }
   bool is_nested_lock_region(); // Is this Lock nested?
 };
 //------------------------------Unlock---------------------------------------
 // High-level unlock operation
 class UnlockNode : public AbstractLockNode {
 public:
   virtual int Opcode() const;
   virtual uint size_of() const; // Size is bigger
   UnlockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) {
     init_class_id(Class_Unlock);
     init_flags(Flag_is_macro);
     C->add_macro_node(this);
   }
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
   // unlock is never a safepoint
   virtual bool        guaranteed_safepoint()  { return false; }
 };
 #endif // SHARE_VM_OPTO_CALLNODE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/opto/callnode.hpp@f90c822e73f8 (annotated)

src/share/vm/opto/callnode.hpp