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      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_rvalue_visitor.h
     26  *
     27  * Generic class to implement the common pattern we have of wanting to
     28  * visit each ir_rvalue * and possibly change that node to a different
     29  * class.  Just implement handle_rvalue() and you will be called with
     30  * a pointer to each rvalue in the tree.
     31  */
     32 
     33 class ir_rvalue_base_visitor : public ir_hierarchical_visitor {
     34 public:
     35    ir_visitor_status rvalue_visit(ir_assignment *);
     36    ir_visitor_status rvalue_visit(ir_call *);
     37    ir_visitor_status rvalue_visit(ir_dereference_array *);
     38    ir_visitor_status rvalue_visit(ir_dereference_record *);
     39    ir_visitor_status rvalue_visit(ir_discard *);
     40    ir_visitor_status rvalue_visit(ir_expression *);
     41    ir_visitor_status rvalue_visit(ir_if *);
     42    ir_visitor_status rvalue_visit(ir_return *);
     43    ir_visitor_status rvalue_visit(ir_swizzle *);
     44    ir_visitor_status rvalue_visit(ir_texture *);
     45    ir_visitor_status rvalue_visit(ir_emit_vertex *);
     46    ir_visitor_status rvalue_visit(ir_end_primitive *);
     47 
     48    virtual void handle_rvalue(ir_rvalue **rvalue) = 0;
     49 };
     50 
     51 class ir_rvalue_visitor : public ir_rvalue_base_visitor {
     52 public:
     53 
     54    virtual ir_visitor_status visit_leave(ir_assignment *);
     55    virtual ir_visitor_status visit_leave(ir_call *);
     56    virtual ir_visitor_status visit_leave(ir_dereference_array *);
     57    virtual ir_visitor_status visit_leave(ir_dereference_record *);
     58    virtual ir_visitor_status visit_leave(ir_discard *);
     59    virtual ir_visitor_status visit_leave(ir_expression *);
     60    virtual ir_visitor_status visit_leave(ir_if *);
     61    virtual ir_visitor_status visit_leave(ir_return *);
     62    virtual ir_visitor_status visit_leave(ir_swizzle *);
     63    virtual ir_visitor_status visit_leave(ir_texture *);
     64    virtual ir_visitor_status visit_leave(ir_emit_vertex *);
     65    virtual ir_visitor_status visit_leave(ir_end_primitive *);
     66 };
     67 
     68 class ir_rvalue_enter_visitor : public ir_rvalue_base_visitor {
     69 public:
     70 
     71    virtual ir_visitor_status visit_enter(ir_assignment *);
     72    virtual ir_visitor_status visit_enter(ir_call *);
     73    virtual ir_visitor_status visit_enter(ir_dereference_array *);
     74    virtual ir_visitor_status visit_enter(ir_dereference_record *);
     75    virtual ir_visitor_status visit_enter(ir_discard *);
     76    virtual ir_visitor_status visit_enter(ir_expression *);
     77    virtual ir_visitor_status visit_enter(ir_if *);
     78    virtual ir_visitor_status visit_enter(ir_return *);
     79    virtual ir_visitor_status visit_enter(ir_swizzle *);
     80    virtual ir_visitor_status visit_enter(ir_texture *);
     81    virtual ir_visitor_status visit_enter(ir_emit_vertex *);
     82    virtual ir_visitor_status visit_enter(ir_end_primitive *);
     83 };
     84