1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // MLEMutator.h -- |
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8 | // |
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9 | // Author : Rodolfo G. Esteves |
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10 | // Created On : Mon May 18 07:44:20 2015 |
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11 | // Last Modified By : Andrew Beach |
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12 | // Last Modified On : Tue Jan 21 10:33:00 2020 |
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13 | // Update Count : 47 |
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14 | // |
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15 | |
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16 | #pragma once |
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17 | |
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18 | #include <list> // for list |
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19 | #include <map> // for map |
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20 | #include <string> // for string |
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21 | #include <set> // for unordered_set |
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22 | |
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23 | #include "Common/PassVisitor.h" |
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24 | #include "Common/SemanticError.h" // for SemanticError |
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25 | #include "SynTree/Label.h" // for Label |
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26 | #include "SynTree/Mutator.h" // for Mutator |
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27 | #include "SynTree/SynTree.h" // for Visitor Nodes |
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28 | |
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29 | namespace ControlStruct { |
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30 | class LabelGenerator; |
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31 | |
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32 | class MultiLevelExitMutator : public WithVisitorRef<MultiLevelExitMutator>, |
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33 | public WithShortCircuiting, public WithGuards { |
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34 | public: |
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35 | class Entry; |
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36 | MultiLevelExitMutator( std::map<Label, Statement *> *t, LabelGenerator *gen = 0 ) : |
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37 | targetTable( t ), breakLabel(std::string("")), generator( gen ) {} |
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38 | ~MultiLevelExitMutator(); |
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39 | |
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40 | void premutate( CompoundStmt *cmpndStmt ); |
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41 | Statement * postmutate( BranchStmt *branchStmt ) throw ( SemanticErrorException ); |
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42 | void premutate( WhileStmt *whileStmt ); |
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43 | Statement * postmutate( WhileStmt *whileStmt ); |
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44 | void premutate( ForStmt *forStmt ); |
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45 | Statement * postmutate( ForStmt *forStmt ); |
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46 | void premutate( CaseStmt *caseStmt ); |
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47 | void premutate( IfStmt *ifStmt ); |
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48 | Statement * postmutate( IfStmt *ifStmt ); |
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49 | void premutate( SwitchStmt *switchStmt ); |
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50 | Statement * postmutate( SwitchStmt *switchStmt ); |
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51 | void premutate( TryStmt *tryStmt ); |
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52 | Statement * postmutate( TryStmt *tryStmt ); |
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53 | void premutate( FinallyStmt *finallyStmt ); |
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54 | |
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55 | Statement *mutateLoop( Statement *bodyLoop, Entry &e ); |
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56 | |
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57 | Label &get_breakLabel() { return breakLabel; } |
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58 | void set_breakLabel( Label newValue ) { breakLabel = newValue; } |
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59 | |
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60 | class Entry { |
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61 | public: |
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62 | // specialized constructors for each combination of statement with labelled break/continue/fallthrough that is valid to cleanup the use cases |
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63 | explicit Entry( ForStmt *stmt, Label breakExit, Label contExit ) : |
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64 | stmt( stmt ), breakExit( breakExit ), contExit( contExit ) {} |
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65 | |
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66 | explicit Entry( WhileStmt *stmt, Label breakExit, Label contExit ) : |
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67 | stmt( stmt ), breakExit( breakExit ), contExit( contExit ) {} |
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68 | |
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69 | explicit Entry( CompoundStmt *stmt, Label breakExit ) : |
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70 | stmt( stmt ), breakExit( breakExit ) {} |
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71 | |
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72 | explicit Entry( IfStmt *stmt, Label breakExit ) : |
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73 | stmt( stmt ), breakExit( breakExit ) {} |
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74 | |
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75 | explicit Entry( CaseStmt *stmt, Label fallExit ) : |
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76 | stmt( stmt ), fallExit( fallExit ) {} |
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77 | |
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78 | explicit Entry( SwitchStmt *stmt, Label breakExit, Label fallDefaultExit ) : |
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79 | stmt( stmt ), breakExit( breakExit ), fallDefaultExit( fallDefaultExit ) {} |
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80 | |
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81 | explicit Entry( TryStmt *stmt, Label breakExit ) : |
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82 | stmt( stmt ), breakExit( breakExit ) {} |
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83 | |
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84 | bool operator==( const Statement *other ) { return stmt == other; } |
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85 | bool operator!=( const Statement *other ) { return stmt != other; } |
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86 | |
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87 | bool operator==( const Entry &other ) { return stmt == other.get_controlStructure(); } |
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88 | |
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89 | Statement *get_controlStructure() const { return stmt; } |
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90 | |
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91 | Label useContExit() { contUsed = true; return contExit; } |
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92 | Label useBreakExit() { breakUsed = true; return breakExit; } |
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93 | Label useFallExit() { fallUsed = true; return fallExit; } |
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94 | Label useFallDefaultExit() { fallDefaultUsed = true; return fallDefaultExit; } |
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95 | |
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96 | bool isContUsed() const { return contUsed; } |
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97 | bool isBreakUsed() const { return breakUsed; } |
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98 | bool isFallUsed() const { return fallUsed; } |
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99 | bool isFallDefaultUsed() const { return fallDefaultUsed; } |
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100 | void seenDefault() { fallDefaultValid = false; } |
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101 | bool isFallDefaultValid() const { return fallDefaultValid; } |
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102 | private: |
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103 | Statement *stmt; |
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104 | Label breakExit, contExit, fallExit, fallDefaultExit; |
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105 | bool breakUsed = false, contUsed = false, fallUsed = false, fallDefaultUsed = false; |
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106 | bool fallDefaultValid = true; |
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107 | }; |
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108 | |
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109 | private: |
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110 | std::map< Label, Statement * > *targetTable; |
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111 | std::set< Label > fallthroughLabels; |
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112 | std::list< Entry > enclosingControlStructures; |
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113 | Label breakLabel; |
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114 | LabelGenerator *generator; |
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115 | |
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116 | template< typename LoopClass > |
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117 | void prehandleLoopStmt( LoopClass * loopStmt ); |
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118 | |
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119 | template< typename LoopClass > |
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120 | Statement * posthandleLoopStmt( LoopClass * loopStmt ); |
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121 | |
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122 | void fixBlock( std::list< Statement * > &kids, bool caseClause = false ); |
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123 | }; |
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124 | } // namespace ControlStruct |
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125 | |
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126 | // Local Variables: // |
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127 | // tab-width: 4 // |
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128 | // mode: c++ // |
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129 | // compile-command: "make install" // |
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130 | // End: // |
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