[68f9c43] | 1 | // |
---|
| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo |
---|
| 3 | // |
---|
| 4 | // The contents of this file are covered under the licence agreement in the |
---|
| 5 | // file "LICENCE" distributed with Cforall. |
---|
| 6 | // |
---|
| 7 | // GcTracer.h -- |
---|
| 8 | // |
---|
| 9 | // Author : Aaron B. Moss |
---|
| 10 | // Created On : Thu Mar 15 14:47:00 2018 |
---|
| 11 | // Last Modified By : Aaron B. Moss |
---|
| 12 | // Last Modified On : Thu Mar 15 14:47:00 2018 |
---|
| 13 | // Update Count : 1 |
---|
| 14 | // |
---|
| 15 | |
---|
| 16 | #pragma once |
---|
| 17 | |
---|
| 18 | #include <list> |
---|
| 19 | |
---|
| 20 | #include "BaseSyntaxNode.h" |
---|
| 21 | #include "Expression.h" |
---|
[bd06384] | 22 | #include "Type.h" |
---|
[68f9c43] | 23 | |
---|
| 24 | #include "Common/GC.h" |
---|
| 25 | #include "Common/PassVisitor.h" |
---|
| 26 | |
---|
| 27 | class Expression; |
---|
| 28 | |
---|
| 29 | /// Implements `trace` method for syntax nodes |
---|
| 30 | class GcTracer final : public WithShortCircuiting, public WithVisitorRef<GcTracer> { |
---|
| 31 | const GC& gc; |
---|
| 32 | |
---|
| 33 | public: |
---|
| 34 | GcTracer( const GC& gc ) : gc(gc) {} |
---|
| 35 | |
---|
[34dcc474] | 36 | // mark node and children |
---|
| 37 | |
---|
[68f9c43] | 38 | void previsit( BaseSyntaxNode * node ) { |
---|
| 39 | // skip tree if already seen |
---|
[24de7b1] | 40 | if ( node->mark == gc.mark ) { |
---|
| 41 | visit_children = false; |
---|
| 42 | return; |
---|
| 43 | } |
---|
[68f9c43] | 44 | |
---|
| 45 | // mark node |
---|
| 46 | node->mark = gc.mark; |
---|
| 47 | } |
---|
| 48 | |
---|
[34dcc474] | 49 | // add visits left out by PassVisitor |
---|
| 50 | |
---|
[24de7b1] | 51 | void postvisit( Constant* con ) { |
---|
| 52 | maybeAccept( con->get_type(), *visitor ); |
---|
| 53 | } |
---|
| 54 | |
---|
[68f9c43] | 55 | void postvisit( Expression* expr ) { |
---|
| 56 | maybeAccept( expr->env, *visitor ); |
---|
| 57 | } |
---|
[bd06384] | 58 | |
---|
[34dcc474] | 59 | void postvisit( UntypedExpr* expr ) { |
---|
| 60 | postvisit( static_cast<Expression*>(expr) ); |
---|
| 61 | maybeAccept( expr->function, *visitor ); |
---|
| 62 | } |
---|
| 63 | |
---|
[24de7b1] | 64 | void postvisit( VariableExpr* expr ) { |
---|
| 65 | postvisit( static_cast<Expression*>(expr) ); |
---|
| 66 | maybeAccept( expr->var, *visitor ); // not in PassVisitor because it causes cycle |
---|
| 67 | } |
---|
| 68 | |
---|
[b5aa3d8] | 69 | void postvisit( Type* type ) { |
---|
| 70 | acceptAll( type->attributes, *visitor ); |
---|
| 71 | } |
---|
| 72 | |
---|
| 73 | void postvisit( PointerType* type ) { |
---|
| 74 | postvisit( static_cast<Type*>(type) ); |
---|
| 75 | maybeAccept( type->dimension, *visitor ); |
---|
[bd06384] | 76 | } |
---|
[68f9c43] | 77 | }; |
---|
| 78 | |
---|
| 79 | /// Traces entire translation unit recursively |
---|
| 80 | static inline const GC& operator<< ( const GC& gc, const std::list<Declaration*>& translationUnit ) { |
---|
| 81 | PassVisitor<GcTracer> tracer{ gc }; |
---|
[8d7bef2] | 82 | acceptAll( const_cast<std::list<Declaration*>&>( translationUnit ), tracer ); |
---|
[68f9c43] | 83 | return gc; |
---|
| 84 | } |
---|
| 85 | |
---|
| 86 | // Local Variables: // |
---|
| 87 | // tab-width: 4 // |
---|
| 88 | // mode: c++ // |
---|
| 89 | // compile-command: "make install" // |
---|
| 90 | // End: // |
---|