[f69fac7] | 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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