src/share/vm/adlc/output_h.cpp

rev 1838 : 6961690: load oops from constant table on SPARC
Summary: oops should be loaded from the constant table of an nmethod instead of materializing them with a long code sequence.
Reviewed-by:

*** 1548,1558 ****
          is_pc_relative = true;
        attr = (Attribute *)attr->_next;
      }
  
      // virtual functions for encode and format
!     //
      // Output the opcode function and the encode function here using the
      // encoding class information in the _insencode slot.
      if ( instr->_insencode ) {
        fprintf(fp,"  virtual void           emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const;\n");
      }
--- 1548,1563 ----
          is_pc_relative = true;
        attr = (Attribute *)attr->_next;
      }
  
      // virtual functions for encode and format
! 
!     // Virtual function for evaluating the constant.
!     if (instr->is_mach_constant()) {
!       fprintf(fp,"  virtual void           eval_constant();\n");
!     }
! 
      // Output the opcode function and the encode function here using the
      // encoding class information in the _insencode slot.
      if ( instr->_insencode ) {
        fprintf(fp,"  virtual void           emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const;\n");
      }
*** 1750,1759 ****
--- 1755,1765 ----
      fprintf(fp, " }\n");
  
      // Virtual methods which are only generated to override base class
      if( instr->expands() || instr->needs_projections() ||
          instr->has_temps() ||
+         instr->is_mach_constant() ||
          instr->_matrule != NULL &&
          instr->num_opnds() != instr->num_unique_opnds() ) {
        fprintf(fp,"  virtual MachNode      *Expand(State *state, Node_List &proj_list, Node* mem);\n");
      }
  
*** 1778,1805 ****
      }
  
      // Declare short branch methods, if applicable
      instr->declare_short_branch_methods(fp);
  
-     // Instructions containing a constant that will be entered into the
-     // float/double table redefine the base virtual function
- #ifdef SPARC
-     // Sparc doubles entries in the constant table require more space for
-     // alignment. (expires 9/98)
-     int table_entries = (3 * instr->num_consts( _globalNames, Form::idealD ))
-       + instr->num_consts( _globalNames, Form::idealF );
- #else
-     int table_entries = instr->num_consts( _globalNames, Form::idealD )
-       + instr->num_consts( _globalNames, Form::idealF );
- #endif
-     if( table_entries != 0 ) {
-       fprintf(fp,"  virtual int            const_size() const {");
-       fprintf(fp,   " return %d;", table_entries);
-       fprintf(fp, " }\n");
-     }
- 
- 
      // See if there is an "ins_pipe" declaration for this instruction
      if (instr->_ins_pipe) {
        fprintf(fp,"  static  const Pipeline *pipeline_class();\n");
        fprintf(fp,"  virtual const Pipeline *pipeline() const;\n");
      }
--- 1784,1793 ----