[51587aa] | 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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[a08ba92] | 7 | // LabelFixer.h -- |
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[51587aa] | 8 | // |
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[843054c2] | 9 | // Author : Rodolfo G. Esteves |
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[51587aa] | 10 | // Created On : Mon May 18 07:44:20 2015 |
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[2871210] | 11 | // Last Modified By : Peter A. Buhr |
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| 12 | // Last Modified On : Mon Jun 29 17:24:39 2015 |
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| 13 | // Update Count : 29 |
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[51587aa] | 14 | // |
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[a08ba92] | 15 | |
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[51b7345] | 16 | #ifndef LABEL_FIXER_H |
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| 17 | #define LABEL_FIXER_H |
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| 18 | |
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| 19 | #include "utility.h" |
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| 20 | #include "SynTree/SynTree.h" |
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| 21 | #include "SynTree/Visitor.h" |
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| 22 | #include "LabelGenerator.h" |
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| 23 | |
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| 24 | #include <map> |
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| 25 | |
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| 26 | namespace ControlStruct { |
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[82dd287] | 27 | /// normalizes label definitions and generates multi-level exit labels |
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[a08ba92] | 28 | class LabelFixer : public Visitor { |
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| 29 | typedef Visitor Parent; |
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[d9a0e76] | 30 | public: |
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[a08ba92] | 31 | LabelFixer( LabelGenerator *gen = 0 ); |
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| 32 | |
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| 33 | std::map < Label, Statement * > *resolveJumps() throw ( SemanticError ); |
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| 34 | |
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| 35 | // Declarations |
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| 36 | virtual void visit( FunctionDecl *functionDecl ); |
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| 37 | |
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| 38 | // Statements |
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| 39 | void visit( Statement *stmt ); |
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| 40 | |
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| 41 | virtual void visit( CompoundStmt *stmt ) { visit( (Statement *)stmt ); return Parent::visit( stmt ); } |
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| 42 | virtual void visit( NullStmt *stmt ) { visit( (Statement *)stmt ); return Parent::visit( stmt ); } |
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| 43 | virtual void visit( ExprStmt *stmt ) { visit( (Statement *)stmt ); return Parent::visit( stmt ); } |
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| 44 | virtual void visit( IfStmt *stmt ) { visit( (Statement *)stmt ); return Parent::visit( stmt ); } |
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| 45 | virtual void visit( WhileStmt *stmt ) { visit( (Statement *)stmt ); return Parent::visit( stmt ); } |
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| 46 | virtual void visit( ForStmt *stmt ) { visit( (Statement *)stmt ); return Parent::visit( stmt ); } |
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| 47 | virtual void visit( SwitchStmt *stmt ) { visit( (Statement *)stmt ); return Parent::visit( stmt ); } |
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| 48 | virtual void visit( ChooseStmt *stmt ) { visit( (Statement *)stmt ); return Parent::visit( stmt ); } |
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| 49 | virtual void visit( FallthruStmt *stmt ) { visit( (Statement *)stmt ); return Parent::visit( stmt ); } |
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| 50 | virtual void visit( CaseStmt *stmt ) { visit( (Statement *)stmt ); return Parent::visit( stmt ); } |
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| 51 | virtual void visit( ReturnStmt *stmt ) { visit( (Statement *)stmt ); return Parent::visit( stmt ); } |
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| 52 | virtual void visit( TryStmt *stmt ) { visit( (Statement *)stmt ); return Parent::visit( stmt ); } |
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| 53 | virtual void visit( CatchStmt *stmt ) { visit( (Statement *)stmt ); return Parent::visit( stmt ); } |
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| 54 | virtual void visit( DeclStmt *stmt ) { visit( (Statement *)stmt ); return Parent::visit( stmt ); } |
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| 55 | virtual void visit( BranchStmt *branchStmt ); |
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[1869adf] | 56 | virtual void visit( UntypedExpr *untyped ); |
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[a08ba92] | 57 | |
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| 58 | Label setLabelsDef( std::list< Label > &, Statement *definition ); |
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[1869adf] | 59 | template< typename UsageNode > |
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| 60 | void setLabelsUsg( Label, UsageNode *usage = 0 ); |
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[d9a0e76] | 61 | |
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| 62 | private: |
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[a08ba92] | 63 | class Entry { |
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[1869adf] | 64 | public: |
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| 65 | union UsageLoc { |
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| 66 | Statement * stmt; |
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| 67 | Expression * expr; |
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| 68 | |
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| 69 | void accept( Visitor &visitor ); |
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| 70 | }; |
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| 71 | |
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| 72 | Entry( Statement *to ) : definition( to ) {} |
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| 73 | Entry( Statement *to, Statement *from ); |
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| 74 | Entry( Statement *to, Expression *from ); |
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[a08ba92] | 75 | bool used() { return ( usage.empty() ); } |
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| 76 | bool defined() { return ( definition != 0 ); } |
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| 77 | bool insideLoop(); |
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| 78 | |
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| 79 | Label get_label() const { return label; } |
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[be5aa1b] | 80 | void set_label( Label lab ) { label = lab; } |
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| 81 | |
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[a08ba92] | 82 | Statement *get_definition() const { return definition; } |
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[be5aa1b] | 83 | void set_definition( Statement *def ) { definition = def; } |
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[a08ba92] | 84 | |
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[1869adf] | 85 | std::list< UsageLoc > &get_uses() { return usage; } |
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| 86 | void add_use( Statement *use ) { |
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| 87 | UsageLoc loc; |
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| 88 | loc.stmt = use; |
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| 89 | usage.push_back( loc ); |
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| 90 | } |
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| 91 | void add_use( Expression *use ) { |
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| 92 | UsageLoc loc; |
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| 93 | loc.expr = use; |
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| 94 | usage.push_back( loc ); |
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| 95 | } |
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| 96 | |
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[2871210] | 97 | void add_uses ( Entry &other ) { usage.insert( usage.end(), other.usage.begin(), other.usage.end() ); } |
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[a08ba92] | 98 | private: |
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| 99 | Label label; |
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| 100 | Statement *definition; |
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[1869adf] | 101 | std::list<UsageLoc> usage; |
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[a08ba92] | 102 | }; |
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| 103 | |
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| 104 | std::map < Label, Entry *> labelTable; |
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| 105 | LabelGenerator *generator; |
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[1869adf] | 106 | Statement * currentStatement; |
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[d9a0e76] | 107 | }; |
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[51b7345] | 108 | } // namespace ControlStruct |
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| 109 | |
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[d9a0e76] | 110 | #endif // LABEL_FIXER_H |
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[51b7345] | 111 | |
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[51587aa] | 112 | // Local Variables: // |
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| 113 | // tab-width: 4 // |
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| 114 | // mode: c++ // |
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| 115 | // compile-command: "make install" // |
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| 116 | // End: // |
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