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ref_clone_changer.h
Go to the documentation of this file.00001 // $Id: ref_clone_changer.h,v 1.10 2003/08/07 23:13:50 pnav Exp $ 00002 // ---------------------------------------------------------------------- 00003 // 00004 // C-Breeze 00005 // C Compiler Framework 00006 // 00007 // Copyright (c) 2000 University of Texas at Austin 00008 // 00009 // Samuel Z. Guyer 00010 // Daniel A. Jimenez 00011 // Calvin Lin 00012 // 00013 // Permission is hereby granted, free of charge, to any person 00014 // obtaining a copy of this software and associated documentation 00015 // files (the "Software"), to deal in the Software without 00016 // restriction, including without limitation the rights to use, copy, 00017 // modify, merge, publish, distribute, sublicense, and/or sell copies 00018 // of the Software, and to permit persons to whom the Software is 00019 // furnished to do so, subject to the following conditions: 00020 // 00021 // The above copyright notice and this permission notice shall be 00022 // included in all copies or substantial portions of the Software. 00023 // 00024 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00025 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00026 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00027 // NONINFRINGEMENT. IN NO EVENT SHALL THE UNIVERSITY OF TEXAS AT 00028 // AUSTIN BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 00029 // IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF 00030 // OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 00031 // THE SOFTWARE. 00032 // 00033 // We acknowledge the C-to-C Translator from MIT Laboratory for 00034 // Computer Science for inspiring parts of the C-Breeze design. 00035 // 00036 // ---------------------------------------------------------------------- 00037 00038 #ifndef CBZ_REF_CLONE_CHANGER_H 00039 #define CBZ_REF_CLONE_CHANGER_H 00040 00041 00042 typedef map< Node *, 00043 Node *, 00044 less< Node * > > node_map; 00045 00046 typedef node_map::iterator node_map_p; 00047 00060 class ref_clone_changer : public Changer 00061 { 00062 public: 00063 00081 static Node * clone(Node * n, bool nil_bad_links); 00082 00083 private: 00084 00085 node_map * map() const { return _map; } 00086 00087 node_map * _map; 00088 00089 ref_clone_changer() 00090 : Changer(Preorder, Subtree, false), 00091 _map(new node_map()) 00092 {} 00093 00094 virtual Node * at_node(Node * the_node, Order ord) 00095 { 00096 Node * newnode = the_node->clone(); 00097 (*_map)[the_node] = newnode; 00098 return newnode; 00099 } 00100 00101 virtual Node * at_decl(declNode * the_decl, Order ord) { 00102 declNode * newnode = (declNode *) this->at_node(the_decl, ord); 00103 newnode->ref_list().clear(); 00104 return newnode; 00105 } 00106 00107 virtual Node * at_label(labelNode * the_label, Order ord) { 00108 labelNode * newnode = (labelNode *) this->at_node(the_label, ord); 00109 newnode->references().clear(); 00110 return newnode; 00111 } 00112 00113 virtual Node * at_switch(switchNode * the_switch, Order ord) { 00114 switchNode * newnode = (switchNode *) this->at_node(the_switch, ord); 00115 newnode->cases().clear(); 00116 return newnode; 00117 } 00118 }; 00119 00120 class ref_fix_walker : public Walker 00121 { 00122 private: 00123 00124 node_map * _map; 00125 bool _nil_bad_links; 00126 00127 Node * lookup(Node * old); 00128 00129 public: 00130 00131 ref_fix_walker(node_map * m, bool nil_bad_links) 00132 : Walker(Preorder, Subtree), 00133 _map(m), 00134 _nil_bad_links(nil_bad_links) 00135 {} 00136 00137 virtual void at_tdef(tdefNode * the_tdef, Order ord); 00138 virtual void at_id(idNode * the_id, Order ord); 00139 virtual void at_call(callNode * the_call, Order ord); 00140 virtual void at_case(caseNode * the_case, Order ord); 00141 virtual void at_goto(gotoNode * the_goto, Order ord); 00142 virtual void at_continue(continueNode * the_continue, Order ord); 00143 virtual void at_break(breakNode * the_break, Order ord); 00144 virtual void at_return(returnNode * the_return, Order ord); 00145 virtual void at_proc(procNode * the_proc, Order ord); 00146 }; 00147 00148 00149 #endif // CBZ_REF_CLONE_CHANGER_H