ir_constant_folding.h

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * \file ir_constant_folding.h
  26  * Replace constant-valued expressions with references to constant values.
  27  */
  28
  29 class ir_constant_folding_visitor : public ir_visitor {
  30 public:
  31    ir_constant_folding_visitor()
  32    {
  33       /* empty */
  34    }
  35
  36    virtual ~ir_constant_folding_visitor()
  37    {
  38       /* empty */
  39    }
  40
  41    /**
  42     * \name Visit methods
  43     *
  44     * As typical for the visitor pattern, there must be one \c visit method for
  45     * each concrete subclass of \c ir_instruction.  Virtual base classes within
  46     * the hierarchy should not have \c visit methods.
  47     */
  48    /*@{*/
  49    virtual void visit(ir_variable *);
  50    virtual void visit(ir_function_signature *);
  51    virtual void visit(ir_function *);
  52    virtual void visit(ir_expression *);
  53    virtual void visit(ir_swizzle *);
  54    virtual void visit(ir_dereference *);
  55    virtual void visit(ir_assignment *);
  56    virtual void visit(ir_constant *);
  57    virtual void visit(ir_call *);
  58    virtual void visit(ir_return *);
  59    virtual void visit(ir_if *);
  60    virtual void visit(ir_loop *);
  61    virtual void visit(ir_loop_jump *);
  62    /*@}*/
  63 };