nodeBuilder.hpp

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/* Copyright 1994 - 1996 LongView Technologies L.L.C. $Revision: 1.26 $ */
/* Copyright (c) 2006, Sun Microsystems, Inc.
All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the 
following conditions are met:

    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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          disclaimer in the documentation and/or other materials provided with the distribution.
    * Neither the name of Sun Microsystems nor the names of its contributors may be used to endorse or promote products derived 
          from this software without specific prior written permission.

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# ifdef DELTA_COMPILER

// The NodeBuilder generates the intermediate representation for a method or block.

class AssignNode;
class TypeTestNode;
class ContextInitNode;
class Inliner;

class NodeBuilder: public CustomizedMethodClosure {
 private:
  ExprStack*    _exprStack;             // current expression stack
  Inliner*      _inliner;               // my inliner
  InlinedScope* _scope;                 // scope for which this NodeBuilder is generating code
  Node*         _current;               // where new nodes are appended

  void append_exit(Node* exitNode);     // append an exit node (UncommonNode, Return, etc.)
  void append1(Node* node);
  void branch (MergeNode* target);
  void comment(char* s);
  GrowableArray<PReg*>* copyCurrentExprStack();
  void access_temporary(int no, int context, bool push);
  GrowableArray<PReg*>* pass_arguments(PReg* self, int nofArgs);
  void splitMergeExpr(Expr* expr, TypeTestNode* test);
  GrowableArray<Expr*>* splittablePaths(const Expr* expr, const TypeTestNode* test) const;
  GrowableArray<NonTrivialNode*>* nodesBetween(Node* from, Node* to);
  MergeNode* insertMergeBefore(Node* n);
  Expr* copy_into_context(Expr* e, int no);
  void materialize(PReg* r, GrowableArray<BlockPReg*>* materialized);   // materialize block (always call before storing/assigning PReg)

  bool abortIfDead(Expr* e);                                            // helper function for dead code handling
  void generate_subinterval(MethodInterval* m, bool produces_result);   // generate subinterval (e.g., code in then branch)
  void constant_if_node(IfNode* node, ConstantExpr* cond);              // code for if with const condition
  TypeTestNode* makeTestNode(bool cond, PReg* r);                       // make boolean type test node

  // for Inliner
  void gen_normal_send(SendInfo* info, int nofArgs, SAPReg* result);
  void gen_self_send  (SendInfo* info, int nofArgs, SAPReg* result);
  void gen_super_send (SendInfo* info, int nofArgs, SAPReg* result);

  friend class Inliner;
  friend class CompilerInliningPolicy;
  friend class PrimInliner;
 protected:
  void abort();

 public:
  static Node*  EndOfCode;              // "at end of code" marker
  
  NodeBuilder();
  void initialize(InlinedScope* scope);

  InlinedScope* scope() const           { return _scope; }
  ExprStack* exprStack() const          { return _exprStack; }
  Node* current() const                 { return _current; }
  void setCurrent(Node* n)              { assert(n != EndOfCode, "bad node"); _current = n; }
  void append (Node* node);             // append a node
  bool is_in_dead_code() const          { return _current == EndOfCode; }
  Inliner* inliner() const              { return _inliner; }
  void removeContextCreation();         // remove context creation node 
  PReg* float_at(int fno);

 public:
  void if_node(IfNode* node);
  void cond_node(CondNode* node);
  void while_node(WhileNode* node);
  void primitive_call_node(PrimitiveCallNode* node);
  void dll_call_node(DLLCallNode* node);

 public:
  void allocate_temporaries(int nofTemps);

  void push_self();
  void push_tos();
  void push_literal(oop obj);

  void push_argument(int no);
  void push_temporary(int no);
  void push_temporary(int no, int context);
  void push_instVar(int offset);
  void push_global(associationOop obj);

  void store_temporary(int no);
  void store_temporary(int no, int context);
  void store_instVar(int offset);
  void store_global(associationOop obj);

  void pop();

  void normal_send(InterpretedIC* ic);
  void self_send  (InterpretedIC* ic);
  void super_send (InterpretedIC* ic);

  void double_equal();
  void double_not_equal();

  void method_return(int nofArgs);
  void nonlocal_return(int nofArgs);

  void allocate_closure(AllocationType type, int nofArgs, methodOop meth);
  void allocate_context(int nofTemps, bool forMethod);

  void set_self_via_context();
  void copy_self_into_context();
  void copy_argument_into_context(int argNo, int no);

  void zap_scope();

  void predict_prim_call(primitive_desc* pdesc, int failure_start);

  void float_allocate(int nofFloatTemps, int nofFloatExprs);
  void float_floatify(Floats::Function f, int fno);
  void float_move(int fno, int from);
  void float_set(int fno, doubleOop value);
  void float_nullary(Floats::Function f, int fno);
  void float_unary(Floats::Function f, int fno);
  void float_binary(Floats::Function f, int fno);
  void float_unaryToOop(Floats::Function f, int fno);
  void float_binaryToOop(Floats::Function f, int fno);
};


# endif

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