source: src/ResolvExpr/CommonType.cc@ a493682

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors deferred_resn demangler enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr new-env no_list persistent-indexer pthread-emulation qualifiedEnum resolv-new with_gc
Last change on this file since a493682 was 65cec25, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Compute common type when reference types are involved
  • Property mode set to 100644
File size: 25.7 KB
Line 
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// CommonType.cc --
8//
9// Author : Richard C. Bilson
10// Created On : Sun May 17 06:59:27 2015
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Thu Mar 16 16:24:31 2017
13// Update Count : 7
14//
15
16#include "typeops.h"
17#include "SynTree/Type.h"
18#include "Unify.h"
19
20/// #define DEBUG
21
22namespace ResolvExpr {
23 class CommonType : public Visitor {
24 public:
25 CommonType( Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars );
26 Type *get_result() const { return result; }
27 private:
28 virtual void visit( VoidType *voidType );
29 virtual void visit( BasicType *basicType );
30 virtual void visit( PointerType *pointerType );
31 virtual void visit( ArrayType *arrayType );
32 virtual void visit( ReferenceType *refType );
33 virtual void visit( FunctionType *functionType );
34 virtual void visit( StructInstType *aggregateUseType );
35 virtual void visit( UnionInstType *aggregateUseType );
36 virtual void visit( EnumInstType *aggregateUseType );
37 virtual void visit( TraitInstType *aggregateUseType );
38 virtual void visit( TypeInstType *aggregateUseType );
39 virtual void visit( TupleType *tupleType );
40 virtual void visit( VarArgsType *varArgsType );
41 virtual void visit( ZeroType *zeroType );
42 virtual void visit( OneType *oneType );
43
44 template< typename Pointer > void getCommonWithVoidPointer( Pointer* voidPointer, Pointer* otherPointer );
45 template< typename RefType > void handleRefType( RefType *inst, Type *other );
46
47 Type *result;
48 Type *type2; // inherited
49 bool widenFirst, widenSecond;
50 const SymTab::Indexer &indexer;
51 TypeEnvironment &env;
52 const OpenVarSet &openVars;
53 };
54
55 Type * handleReference( ReferenceType * refType, Type * other, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment & env, const OpenVarSet &openVars ) {
56 Type * result = nullptr, * common = nullptr;
57 AssertionSet have, need;
58 OpenVarSet newOpen( openVars );
59 // need unify to bind type variables
60 if ( unify( refType->get_base(), other, env, have, need, newOpen, indexer, common ) ) {
61 // std::cerr << "unify success" << std::endl;
62 if ( widenSecond ) {
63 if ( widenFirst || other->get_qualifiers() <= refType->get_qualifiers() ) {
64 result = new ReferenceType( refType->get_qualifiers(), common ); // refType->clone();
65 result->get_qualifiers() |= other->get_qualifiers();
66 }
67 } else if ( widenFirst ) {
68 if ( widenSecond || refType->get_qualifiers() <= other->get_qualifiers() ) {
69 result = common;
70 result->get_qualifiers() |= refType->get_qualifiers();
71 }
72 }
73 } else {
74 // std::cerr << "exact unify failed: " << refType << " " << other << std::endl;
75 }
76 // std::cerr << "common type of reference [" << refType << "] and non-reference [" << other << "] is [" << result << "]" << std::endl;
77 return result;
78 }
79
80 Type *commonType( Type *type1, Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars ) {
81 CommonType visitor( type2, widenFirst, widenSecond, indexer, env, openVars );
82
83 ReferenceType * refType1 = dynamic_cast< ReferenceType * >( type1 );
84 ReferenceType * refType2 = dynamic_cast< ReferenceType * >( type2 );
85 if ( (refType1 || refType2) && (! refType1 || ! refType2) ) {
86 // handle the case where exactly one of the types is a reference type specially
87 if ( refType1 ) {
88 return handleReference( refType1, type2, widenFirst, widenSecond, indexer, env, openVars );
89 } else if ( refType2 ) {
90 return handleReference( refType2, type1, widenSecond, widenFirst, indexer, env, openVars );
91 }
92 }
93
94 type1->accept( visitor );
95 Type *result = visitor.get_result();
96 if ( ! result ) {
97 // this appears to be handling for opaque type declarations
98 if ( widenSecond ) {
99 if ( TypeInstType *inst = dynamic_cast< TypeInstType* >( type2 ) ) {
100 if ( NamedTypeDecl *nt = indexer.lookupType( inst->get_name() ) ) {
101 TypeDecl *type = safe_dynamic_cast< TypeDecl* >( nt );
102 if ( type->get_base() ) {
103 Type::Qualifiers tq1 = type1->get_qualifiers(), tq2 = type2->get_qualifiers();
104 AssertionSet have, need;
105 OpenVarSet newOpen( openVars );
106 type1->get_qualifiers() = Type::Qualifiers();
107 type->get_base()->get_qualifiers() = tq1;
108 if ( unifyExact( type1, type->get_base(), env, have, need, newOpen, indexer ) ) {
109 result = type1->clone();
110 result->get_qualifiers() = tq1 | tq2;
111 } // if
112 type1->get_qualifiers() = tq1;
113 type->get_base()->get_qualifiers() = Type::Qualifiers();
114 } // if
115 } // if
116 } // if
117 } // if
118 } // if
119#ifdef DEBUG
120 std::cout << "============= commonType" << std::endl << "type1 is ";
121 type1->print( std::cout );
122 std::cout << " type2 is ";
123 type2->print( std::cout );
124 if ( result ) {
125 std::cout << " common type is ";
126 result->print( std::cout );
127 } else {
128 std::cout << " no common type";
129 } // if
130 std::cout << std::endl;
131#endif
132 return result;
133 }
134
135 static const BasicType::Kind combinedType[ BasicType::NUMBER_OF_BASIC_TYPES ][ BasicType::NUMBER_OF_BASIC_TYPES ] =
136 {
137/* Bool Char SignedChar UnsignedChar ShortSignedInt ShortUnsignedInt SignedInt UnsignedInt LongSignedInt LongUnsignedInt LongLongSignedInt LongLongUnsignedInt Float Double LongDouble FloatComplex DoubleComplex LongDoubleComplex FloatImaginary DoubleImaginary LongDoubleImaginary */
138 /* Bool */ { BasicType::Bool, BasicType::Char, BasicType::SignedChar, BasicType::UnsignedChar, BasicType::ShortSignedInt, BasicType::ShortUnsignedInt, BasicType::SignedInt, BasicType::UnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
139 /* Char */ { BasicType::Char, BasicType::Char, BasicType::UnsignedChar, BasicType::UnsignedChar, BasicType::ShortSignedInt, BasicType::ShortUnsignedInt, BasicType::SignedInt, BasicType::UnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
140 /* SignedChar */ { BasicType::SignedChar, BasicType::UnsignedChar, BasicType::SignedChar, BasicType::UnsignedChar, BasicType::ShortSignedInt, BasicType::ShortUnsignedInt, BasicType::SignedInt, BasicType::UnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
141 /* UnsignedChar */ { BasicType::UnsignedChar, BasicType::UnsignedChar, BasicType::UnsignedChar, BasicType::UnsignedChar, BasicType::ShortSignedInt, BasicType::ShortUnsignedInt, BasicType::SignedInt, BasicType::UnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
142 /* ShortSignedInt */ { BasicType::ShortSignedInt, BasicType::ShortSignedInt, BasicType::ShortSignedInt, BasicType::ShortSignedInt, BasicType::ShortSignedInt, BasicType::ShortUnsignedInt, BasicType::SignedInt, BasicType::UnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
143 /* ShortUnsignedInt */ { BasicType::ShortUnsignedInt, BasicType::ShortUnsignedInt, BasicType::ShortUnsignedInt, BasicType::ShortUnsignedInt, BasicType::ShortUnsignedInt, BasicType::ShortUnsignedInt, BasicType::SignedInt, BasicType::UnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
144 /* SignedInt */ { BasicType::SignedInt, BasicType::SignedInt, BasicType::SignedInt, BasicType::SignedInt, BasicType::SignedInt, BasicType::SignedInt, BasicType::SignedInt, BasicType::UnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
145 /* UnsignedInt */ { BasicType::UnsignedInt, BasicType::UnsignedInt, BasicType::UnsignedInt, BasicType::UnsignedInt, BasicType::UnsignedInt, BasicType::UnsignedInt, BasicType::UnsignedInt, BasicType::UnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
146 /* LongSignedInt */ { BasicType::LongSignedInt, BasicType::LongSignedInt, BasicType::LongSignedInt, BasicType::LongSignedInt, BasicType::LongSignedInt, BasicType::LongSignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
147 /* LongUnsignedInt */ { BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
148 /* LongLongSignedInt */ { BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
149 /* LongLongUnsignedInt */ { BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
150 /* Float */ { BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
151 /* Double */ { BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::LongDouble, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
152 /* LongDouble */ { BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex },
153 /* FloatComplex */ { BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
154 /* DoubleComplex */ { BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
155 /* LongDoubleComplex */ { BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex },
156 /* FloatImaginary */ { BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatImaginary, BasicType::DoubleImaginary, BasicType::LongDoubleImaginary },
157 /* DoubleImaginary */ { BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::DoubleImaginary, BasicType::DoubleImaginary, BasicType::LongDoubleImaginary },
158 /* LongDoubleImaginary */ { BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleImaginary, BasicType::LongDoubleImaginary, BasicType::LongDoubleImaginary }
159 };
160
161 CommonType::CommonType( Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars )
162 : result( 0 ), type2( type2 ), widenFirst( widenFirst ), widenSecond( widenSecond ), indexer( indexer ), env( env ), openVars( openVars ) {
163 }
164
165 void CommonType::visit( __attribute((unused)) VoidType *voidType ) {}
166
167 void CommonType::visit( BasicType *basicType ) {
168 if ( BasicType *otherBasic = dynamic_cast< BasicType* >( type2 ) ) {
169 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ otherBasic->get_kind() ];
170 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= otherBasic->get_qualifiers() ) || widenFirst ) && ( ( newType == otherBasic->get_kind() && basicType->get_qualifiers() <= otherBasic->get_qualifiers() ) || widenSecond ) ) {
171 result = new BasicType( basicType->get_qualifiers() | otherBasic->get_qualifiers(), newType );
172 } // if
173 } else if ( dynamic_cast< EnumInstType * > ( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
174 // use signed int in lieu of the enum/zero/one type
175 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ BasicType::SignedInt ];
176 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= type2->get_qualifiers() ) || widenFirst ) && ( ( newType != basicType->get_kind() && basicType->get_qualifiers() <= type2->get_qualifiers() ) || widenSecond ) ) {
177 result = new BasicType( basicType->get_qualifiers() | type2->get_qualifiers(), newType );
178 } // if
179 } // if
180 }
181
182 template< typename Pointer >
183 void CommonType::getCommonWithVoidPointer( Pointer* voidPointer, Pointer* otherPointer ) {
184 if ( TypeInstType* var = dynamic_cast< TypeInstType* >( otherPointer->get_base() ) ) {
185 OpenVarSet::const_iterator entry = openVars.find( var->get_name() );
186 if ( entry != openVars.end() ) {
187 AssertionSet need, have;
188 WidenMode widen( widenFirst, widenSecond );
189 if ( entry != openVars.end() && ! bindVar(var, voidPointer->get_base(), entry->second, env, need, have, openVars, widen, indexer ) ) return;
190 }
191 }
192 result = voidPointer->clone();
193 result->get_qualifiers() |= otherPointer->get_qualifiers();
194 }
195
196 void CommonType::visit( PointerType *pointerType ) {
197 if ( PointerType *otherPointer = dynamic_cast< PointerType* >( type2 ) ) {
198 if ( widenFirst && dynamic_cast< VoidType* >( otherPointer->get_base() ) && ! isFtype(pointerType->get_base()) ) {
199 getCommonWithVoidPointer( otherPointer, pointerType );
200 } else if ( widenSecond && dynamic_cast< VoidType* >( pointerType->get_base() ) && ! isFtype(otherPointer->get_base()) ) {
201 getCommonWithVoidPointer( pointerType, otherPointer );
202 } else if ( ( pointerType->get_base()->get_qualifiers() >= otherPointer->get_base()->get_qualifiers() || widenFirst )
203 && ( pointerType->get_base()->get_qualifiers() <= otherPointer->get_base()->get_qualifiers() || widenSecond ) ) {
204 Type::Qualifiers tq1 = pointerType->get_base()->get_qualifiers(), tq2 = otherPointer->get_base()->get_qualifiers();
205 pointerType->get_base()->get_qualifiers() = Type::Qualifiers();
206 otherPointer->get_base()->get_qualifiers() = Type::Qualifiers();
207 AssertionSet have, need;
208 OpenVarSet newOpen( openVars );
209 if ( unifyExact( pointerType->get_base(), otherPointer->get_base(), env, have, need, newOpen, indexer ) ) {
210 if ( tq1 < tq2 ) {
211 result = pointerType->clone();
212 } else {
213 result = otherPointer->clone();
214 } // if
215 result->get_qualifiers() = tq1 | tq2;
216 } else {
217 /// std::cout << "place for ptr-to-type" << std::endl;
218 } // if
219 pointerType->get_base()->get_qualifiers() = tq1;
220 otherPointer->get_base()->get_qualifiers() = tq2;
221 } // if
222 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
223 result = pointerType->clone();
224 result->get_qualifiers() |= type2->get_qualifiers();
225 } // if
226 }
227
228 void CommonType::visit( __attribute((unused)) ArrayType *arrayType ) {}
229
230 void CommonType::visit( ReferenceType *refType ) {
231 if ( ReferenceType *otherRef = dynamic_cast< ReferenceType* >( type2 ) ) {
232 if ( widenFirst && dynamic_cast< VoidType* >( otherRef->get_base() ) && ! isFtype(refType->get_base()) ) {
233 getCommonWithVoidPointer( otherRef, refType );
234 } else if ( widenSecond && dynamic_cast< VoidType* >( refType->get_base() ) && ! isFtype(otherRef->get_base()) ) {
235 getCommonWithVoidPointer( refType, otherRef );
236 } else if ( ( refType->get_base()->get_qualifiers() >= otherRef->get_base()->get_qualifiers() || widenFirst )
237 && ( refType->get_base()->get_qualifiers() <= otherRef->get_base()->get_qualifiers() || widenSecond ) ) {
238 Type::Qualifiers tq1 = refType->get_base()->get_qualifiers(), tq2 = otherRef->get_base()->get_qualifiers();
239 refType->get_base()->get_qualifiers() = Type::Qualifiers();
240 otherRef->get_base()->get_qualifiers() = Type::Qualifiers();
241 AssertionSet have, need;
242 OpenVarSet newOpen( openVars );
243 if ( unifyExact( refType->get_base(), otherRef->get_base(), env, have, need, newOpen, indexer ) ) {
244 if ( tq1 < tq2 ) {
245 result = refType->clone();
246 } else {
247 result = otherRef->clone();
248 } // if
249 result->get_qualifiers() = tq1 | tq2;
250 } else {
251 /// std::cout << "place for ptr-to-type" << std::endl;
252 } // if
253 refType->get_base()->get_qualifiers() = tq1;
254 otherRef->get_base()->get_qualifiers() = tq2;
255 } // if
256 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
257 result = refType->clone();
258 result->get_qualifiers() |= type2->get_qualifiers();
259 } // if
260 }
261
262 void CommonType::visit( __attribute((unused)) FunctionType *functionType ) {}
263 void CommonType::visit( __attribute((unused)) StructInstType *aggregateUseType ) {}
264 void CommonType::visit( __attribute((unused)) UnionInstType *aggregateUseType ) {}
265
266 void CommonType::visit( EnumInstType *enumInstType ) {
267 if ( dynamic_cast< BasicType * >( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
268 // reuse BasicType, EnumInstType code by swapping type2 with enumInstType
269 ValueGuard< Type * > temp( type2 );
270 type2 = enumInstType;
271 temp.old->accept( *this );
272 } // if
273 }
274
275 void CommonType::visit( __attribute((unused)) TraitInstType *aggregateUseType ) {
276 }
277
278 void CommonType::visit( TypeInstType *inst ) {
279 if ( widenFirst ) {
280 NamedTypeDecl *nt = indexer.lookupType( inst->get_name() );
281 if ( nt ) {
282 TypeDecl *type = safe_dynamic_cast< TypeDecl* >( nt );
283 if ( type->get_base() ) {
284 Type::Qualifiers tq1 = inst->get_qualifiers(), tq2 = type2->get_qualifiers();
285 AssertionSet have, need;
286 OpenVarSet newOpen( openVars );
287 type2->get_qualifiers() = Type::Qualifiers();
288 type->get_base()->get_qualifiers() = tq1;
289 if ( unifyExact( type->get_base(), type2, env, have, need, newOpen, indexer ) ) {
290 result = type2->clone();
291 result->get_qualifiers() = tq1 | tq2;
292 } // if
293 type2->get_qualifiers() = tq2;
294 type->get_base()->get_qualifiers() = Type::Qualifiers();
295 } // if
296 } // if
297 } // if
298 }
299
300 void CommonType::visit( __attribute((unused)) TupleType *tupleType ) {}
301 void CommonType::visit( __attribute((unused)) VarArgsType *varArgsType ) {}
302
303 void CommonType::visit( ZeroType *zeroType ) {
304 if ( widenFirst ) {
305 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< PointerType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
306 if ( widenSecond || zeroType->get_qualifiers() <= type2->get_qualifiers() ) {
307 result = type2->clone();
308 result->get_qualifiers() |= zeroType->get_qualifiers();
309 }
310 } else if ( widenSecond && dynamic_cast< OneType* >( type2 ) ) {
311 result = new BasicType( zeroType->get_qualifiers(), BasicType::SignedInt );
312 result->get_qualifiers() |= type2->get_qualifiers();
313 }
314 }
315 }
316
317 void CommonType::visit( OneType *oneType ) {
318 if ( widenFirst ) {
319 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
320 if ( widenSecond || oneType->get_qualifiers() <= type2->get_qualifiers() ) {
321 result = type2->clone();
322 result->get_qualifiers() |= oneType->get_qualifiers();
323 }
324 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
325 result = new BasicType( oneType->get_qualifiers(), BasicType::SignedInt );
326 result->get_qualifiers() |= type2->get_qualifiers();
327 }
328 }
329 }
330} // namespace ResolvExpr
331
332// Local Variables: //
333// tab-width: 4 //
334// mode: c++ //
335// compile-command: "make install" //
336// End: //
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