[68f9c43] | 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 | // GcTracer.h -- |
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| 8 | // |
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| 9 | // Author : Aaron B. Moss |
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| 10 | // Created On : Thu Mar 15 14:47:00 2018 |
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| 11 | // Last Modified By : Aaron B. Moss |
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| 12 | // Last Modified On : Thu Mar 15 14:47:00 2018 |
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| 13 | // Update Count : 1 |
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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> |
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| 19 | |
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| 20 | #include "BaseSyntaxNode.h" |
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| 21 | #include "Expression.h" |
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[2efe4b8] | 22 | #include "Label.h" |
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[bd06384] | 23 | #include "Type.h" |
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[68f9c43] | 24 | |
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| 25 | #include "Common/GC.h" |
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| 26 | #include "Common/PassVisitor.h" |
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| 27 | |
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| 28 | class Expression; |
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| 29 | |
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| 30 | /// Implements `trace` method for syntax nodes |
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| 31 | class GcTracer final : public WithShortCircuiting, public WithVisitorRef<GcTracer> { |
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| 32 | const GC& gc; |
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| 33 | |
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| 34 | public: |
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| 35 | GcTracer( const GC& gc ) : gc(gc) {} |
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| 36 | |
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[34dcc474] | 37 | // mark node and children |
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| 38 | |
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[68f9c43] | 39 | void previsit( BaseSyntaxNode * node ) { |
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| 40 | // skip tree if already seen |
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[24de7b1] | 41 | if ( node->mark == gc.mark ) { |
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| 42 | visit_children = false; |
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| 43 | return; |
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| 44 | } |
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[68f9c43] | 45 | |
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| 46 | // mark node |
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| 47 | node->mark = gc.mark; |
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| 48 | } |
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| 49 | |
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[34dcc474] | 50 | // add visits left out by PassVisitor |
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| 51 | |
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[24de7b1] | 52 | void postvisit( Constant* con ) { |
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| 53 | maybeAccept( con->get_type(), *visitor ); |
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| 54 | } |
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| 55 | |
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[2efe4b8] | 56 | void postvisit( AggregateDecl* decl ) { |
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| 57 | acceptAll( decl->attributes, *visitor ); |
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| 58 | } |
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| 59 | |
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[5af7306] | 60 | void postvisit( DeclarationWithType* decl ) { |
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| 61 | maybeAccept( decl->asmName, *visitor ); |
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| 62 | } |
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| 63 | |
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| 64 | private: |
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| 65 | void visit( InferredParams& inferParams ) { |
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| 66 | for ( auto& entry : inferParams ) { |
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| 67 | maybeAccept( entry.second.actualType, *visitor ); |
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| 68 | maybeAccept( entry.second.formalType, *visitor ); |
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| 69 | maybeAccept( entry.second.expr, *visitor ); |
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| 70 | visit( *entry.second.inferParams ); |
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| 71 | } |
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| 72 | } |
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| 73 | |
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| 74 | public: |
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[68f9c43] | 75 | void postvisit( Expression* expr ) { |
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| 76 | maybeAccept( expr->env, *visitor ); |
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[5af7306] | 77 | visit( expr->inferParams ); |
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[68f9c43] | 78 | } |
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[bd06384] | 79 | |
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[42107b4] | 80 | void postvisit( OffsetofExpr* expr ) { |
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| 81 | postvisit( static_cast<Expression*>(expr) ); |
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| 82 | maybeAccept( expr->member, *visitor ); |
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| 83 | } |
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| 84 | |
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[2efe4b8] | 85 | void postvisit( UniqueExpr* expr ) { |
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| 86 | postvisit( static_cast<Expression*>(expr) ); |
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| 87 | maybeAccept( expr->object, *visitor ); |
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| 88 | maybeAccept( expr->var, *visitor ); |
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| 89 | } |
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| 90 | |
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[34dcc474] | 91 | void postvisit( UntypedExpr* expr ) { |
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| 92 | postvisit( static_cast<Expression*>(expr) ); |
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| 93 | maybeAccept( expr->function, *visitor ); |
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| 94 | } |
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| 95 | |
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[24de7b1] | 96 | void postvisit( VariableExpr* expr ) { |
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| 97 | postvisit( static_cast<Expression*>(expr) ); |
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| 98 | maybeAccept( expr->var, *visitor ); // not in PassVisitor because it causes cycle |
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| 99 | } |
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| 100 | |
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[2efe4b8] | 101 | private: |
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| 102 | void visit( Label& lbl ) { |
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| 103 | acceptAll( lbl.get_attributes(), *visitor ); |
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[f6f0cca3] | 104 | // maybeAccept( lbl.get_statement(), *visitor ); // introduces infinite loop in tracer |
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[2efe4b8] | 105 | } |
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| 106 | |
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| 107 | public: |
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| 108 | void postvisit( Statement* stmt ) { |
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| 109 | for ( Label& l : stmt->labels ) { |
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| 110 | visit( l ); |
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| 111 | } |
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| 112 | } |
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| 113 | |
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[b5aa3d8] | 114 | void postvisit( Type* type ) { |
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| 115 | acceptAll( type->attributes, *visitor ); |
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| 116 | } |
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| 117 | |
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[824a2dc] | 118 | void postvisit( EnumInstType* type ) { |
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| 119 | postvisit( static_cast<Type*>(type) ); |
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| 120 | maybeAccept( type->baseEnum, *visitor ); |
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| 121 | } |
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| 122 | |
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[b5aa3d8] | 123 | void postvisit( PointerType* type ) { |
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| 124 | postvisit( static_cast<Type*>(type) ); |
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| 125 | maybeAccept( type->dimension, *visitor ); |
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[bd06384] | 126 | } |
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[824a2dc] | 127 | |
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| 128 | void postvisit( StructInstType* type ) { |
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| 129 | postvisit( static_cast<Type*>(type) ); |
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| 130 | maybeAccept( type->baseStruct, *visitor ); |
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| 131 | } |
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| 132 | |
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| 133 | void postvisit( TraitInstType* type ) { |
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| 134 | postvisit( static_cast<Type*>(type) ); |
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| 135 | maybeAccept( type->baseTrait, *visitor ); |
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| 136 | } |
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| 137 | |
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| 138 | void postvisit( TypeInstType* type ) { |
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| 139 | postvisit( static_cast<Type*>(type) ); |
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| 140 | maybeAccept( type->baseType, *visitor ); |
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| 141 | } |
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| 142 | |
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| 143 | void postvisit( UnionInstType* type ) { |
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| 144 | postvisit( static_cast<Type*>(type) ); |
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| 145 | maybeAccept( type->baseUnion, *visitor ); |
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| 146 | } |
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[68f9c43] | 147 | }; |
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| 148 | |
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| 149 | /// Traces entire translation unit recursively |
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| 150 | static inline const GC& operator<< ( const GC& gc, const std::list<Declaration*>& translationUnit ) { |
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| 151 | PassVisitor<GcTracer> tracer{ gc }; |
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[8d7bef2] | 152 | acceptAll( const_cast<std::list<Declaration*>&>( translationUnit ), tracer ); |
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[68f9c43] | 153 | return gc; |
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| 154 | } |
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| 155 | |
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| 156 | // Local Variables: // |
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| 157 | // tab-width: 4 // |
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| 158 | // mode: c++ // |
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| 159 | // compile-command: "make install" // |
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| 160 | // End: // |
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