| 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 | // ScrubTyVars.cc -- |
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| 8 | // |
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| 9 | // Author : Richard C. Bilson |
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| 10 | // Created On : Mon May 18 07:44:20 2015 |
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| 11 | // Last Modified By : Peter A. Buhr |
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| 12 | // Last Modified On : Thu Mar 16 15:44:27 2017 |
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| 13 | // Update Count : 3 |
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| 14 | // |
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| 15 | |
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| 16 | #include <utility> // for pair |
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| 17 | |
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| 18 | #include "GenPoly.h" // for mangleType, TyVarMap, alignof... |
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| 19 | #include "GenPoly/ErasableScopedMap.h" // for ErasableScopedMap<>::const_it... |
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| 20 | #include "ScrubTyVars.h" |
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| 21 | #include "SynTree/Declaration.h" // for TypeDecl, TypeDecl::Data, Typ... |
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| 22 | #include "SynTree/Expression.h" // for Expression (ptr only), NameExpr |
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| 23 | #include "SynTree/Mutator.h" // for Mutator |
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| 24 | #include "SynTree/Type.h" // for PointerType, TypeInstType, Type |
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| 25 | |
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| 26 | namespace GenPoly { |
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| 27 | Type * ScrubTyVars::postmutate( TypeInstType * typeInst ) { |
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| 28 | if ( ! tyVars ) { |
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| 29 | if ( typeInst->get_isFtype() ) { |
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| 30 | delete typeInst; |
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| 31 | return new PointerType( Type::Qualifiers(), new FunctionType( Type::Qualifiers(), true ) ); |
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| 32 | } else { |
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| 33 | PointerType * ret = new PointerType( Type::Qualifiers(), new VoidType( typeInst->get_qualifiers() ) ); |
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| 34 | delete typeInst; |
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| 35 | return ret; |
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| 36 | } |
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| 37 | } |
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| 38 | |
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| 39 | TyVarMap::const_iterator tyVar = tyVars->find( typeInst->name ); |
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| 40 | if ( tyVar != tyVars->end() ) { |
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| 41 | switch ( tyVar->second.kind ) { |
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| 42 | case TypeDecl::Dtype: |
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| 43 | case TypeDecl::Ttype: |
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| 44 | { |
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| 45 | PointerType * ret = new PointerType( Type::Qualifiers(), new VoidType( typeInst->get_qualifiers() ) ); |
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| 46 | delete typeInst; |
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| 47 | return ret; |
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| 48 | } |
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| 49 | case TypeDecl::Ftype: |
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| 50 | delete typeInst; |
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| 51 | return new PointerType( Type::Qualifiers(), new FunctionType( Type::Qualifiers(), true ) ); |
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| 52 | default: |
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| 53 | assertf(false, "Unhandled tyvar kind: %d", tyVar->second.kind); |
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| 54 | } // switch |
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| 55 | } // if |
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| 56 | return typeInst; |
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| 57 | } |
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| 58 | |
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| 59 | Type * ScrubTyVars::mutateAggregateType( Type * ty ) { |
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| 60 | if ( shouldScrub( ty ) ) { |
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| 61 | PointerType * ret = new PointerType( Type::Qualifiers(), new VoidType( ty->get_qualifiers() ) ); |
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| 62 | delete ty; |
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| 63 | return ret; |
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| 64 | } |
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| 65 | return ty; |
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| 66 | } |
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| 67 | |
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| 68 | Type * ScrubTyVars::postmutate( StructInstType * structInst ) { |
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| 69 | return mutateAggregateType( structInst ); |
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| 70 | } |
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| 71 | |
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| 72 | Type * ScrubTyVars::postmutate( UnionInstType * unionInst ) { |
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| 73 | return mutateAggregateType( unionInst ); |
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| 74 | } |
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| 75 | |
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| 76 | void ScrubTyVars::primeBaseScrub( Type * type ) { |
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| 77 | // need to determine whether type needs to be scrubbed to determine whether |
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| 78 | // automatic recursion is necessary |
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| 79 | if ( Type * t = shouldScrub( type ) ) { |
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| 80 | visit_children = false; |
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| 81 | GuardValue( dynType ); |
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| 82 | dynType = t; |
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| 83 | } |
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| 84 | } |
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| 85 | |
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| 86 | Expression * ScrubTyVars::postmutate( SizeofExpr * szeof ) { |
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| 87 | // sizeof( T ) => _sizeof_T parameter, which is the size of T |
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| 88 | if ( dynType ) { |
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| 89 | Expression *expr = new NameExpr( sizeofName( mangleType( dynType ) ) ); |
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| 90 | return expr; |
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| 91 | } // if |
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| 92 | return szeof; |
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| 93 | } |
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| 94 | |
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| 95 | Expression * ScrubTyVars::postmutate( AlignofExpr * algnof ) { |
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| 96 | // alignof( T ) => _alignof_T parameter, which is the alignment of T |
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| 97 | if ( dynType ) { |
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| 98 | Expression *expr = new NameExpr( alignofName( mangleType( dynType ) ) ); |
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| 99 | return expr; |
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| 100 | } // if |
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| 101 | return algnof; |
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| 102 | } |
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| 103 | |
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| 104 | Type * ScrubTyVars::postmutate( PointerType * pointer ) { |
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| 105 | if ( dynType ) { |
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| 106 | Type * ret = dynType->acceptMutator( *visitor ); |
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| 107 | ret->get_qualifiers() |= pointer->get_qualifiers(); |
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| 108 | pointer->base = nullptr; |
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| 109 | delete pointer; |
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| 110 | return ret; |
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| 111 | } |
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| 112 | return pointer; |
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| 113 | } |
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| 114 | } // namespace GenPoly |
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| 115 | |
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| 116 | // Local Variables: // |
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| 117 | // tab-width: 4 // |
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| 118 | // mode: c++ // |
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| 119 | // compile-command: "make install" // |
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| 120 | // End: // |
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