1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2019 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 | // Util.hpp -- General utilities for working with the AST. |
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8 | // |
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9 | // Author : Andrew Beach |
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10 | // Created On : Wed Jan 19 9:46:00 2022 |
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11 | // Last Modified By : Andrew Beach |
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12 | // Last Modified On : Fri Feb 18 9:42:00 2022 |
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13 | // Update Count : 0 |
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14 | // |
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15 | |
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16 | #include "Util.hpp" |
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17 | |
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18 | #include "Decl.hpp" |
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19 | #include "Node.hpp" |
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20 | #include "Pass.hpp" |
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21 | #include "TranslationUnit.hpp" |
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22 | #include "Common/ScopedMap.h" |
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23 | |
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24 | #include <vector> |
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25 | |
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26 | namespace ast { |
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27 | |
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28 | namespace { |
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29 | |
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30 | /// Check that ast::ptr/strong references do not form a cycle. |
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31 | struct NoStrongCyclesCore { |
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32 | std::vector<const Node *> parents; |
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33 | |
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34 | void previsit( const Node * node ) { |
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35 | for ( auto & parent : parents ) { |
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36 | assert( parent != node ); |
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37 | } |
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38 | parents.push_back( node ); |
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39 | } |
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40 | |
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41 | void postvisit( const Node * node ) { |
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42 | assert( !parents.empty() ); |
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43 | assert( parents.back() == node ); |
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44 | parents.pop_back(); |
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45 | } |
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46 | }; |
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47 | |
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48 | struct InvariantCore { |
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49 | // To save on the number of visits: this is a kind of composed core. |
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50 | // None of the passes should make changes so ordering doesn't matter. |
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51 | NoStrongCyclesCore no_strong_cycles; |
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52 | |
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53 | void previsit( const Node * node ) { |
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54 | no_strong_cycles.previsit( node ); |
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55 | } |
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56 | |
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57 | void postvisit( const Node * node ) { |
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58 | no_strong_cycles.postvisit( node ); |
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59 | } |
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60 | }; |
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61 | |
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62 | } // namespace |
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63 | |
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64 | void checkInvariants( TranslationUnit & transUnit ) { |
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65 | ast::Pass<InvariantCore>::run( transUnit ); |
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66 | } |
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67 | |
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68 | } // namespace ast |
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