source: src/ResolvExpr/CommonType.cc@ 6d267ca

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 6d267ca was e6cee92, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Fix TupleAssignment code for references
  • Property mode set to 100644
File size: 26.0 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 int depth1 = type1->referenceDepth();
84 int depth2 = type2->referenceDepth();
85 if ( depth1 > 0 || depth2 > 0 ) {
86 int diff = depth1-depth2;
87 // TODO: should it be possible for commonType to generate complicated conversions? I would argue no, only conversions that involve types of the same reference level or a difference of 1 should be allowed.
88 if ( diff > 1 || diff < -1 ) return nullptr;
89
90 // special case where one type has a reference depth of 1 larger than the other
91 if ( diff > 0 ) {
92 return handleReference( safe_dynamic_cast<ReferenceType *>( type1 ), type2, widenFirst, widenSecond, indexer, env, openVars );
93 } else if ( diff < 0 ) {
94 return handleReference( safe_dynamic_cast<ReferenceType *>( type2 ), type1, widenSecond, widenFirst, indexer, env, openVars );
95 }
96 // otherwise, both are reference types of the same depth and this is handled by the CommonType visitor.
97 }
98
99 type1->accept( visitor );
100 Type *result = visitor.get_result();
101 if ( ! result ) {
102 // this appears to be handling for opaque type declarations
103 if ( widenSecond ) {
104 if ( TypeInstType *inst = dynamic_cast< TypeInstType* >( type2 ) ) {
105 if ( NamedTypeDecl *nt = indexer.lookupType( inst->get_name() ) ) {
106 TypeDecl *type = safe_dynamic_cast< TypeDecl* >( nt );
107 if ( type->get_base() ) {
108 Type::Qualifiers tq1 = type1->get_qualifiers(), tq2 = type2->get_qualifiers();
109 AssertionSet have, need;
110 OpenVarSet newOpen( openVars );
111 type1->get_qualifiers() = Type::Qualifiers();
112 type->get_base()->get_qualifiers() = tq1;
113 if ( unifyExact( type1, type->get_base(), env, have, need, newOpen, indexer ) ) {
114 result = type1->clone();
115 result->get_qualifiers() = tq1 | tq2;
116 } // if
117 type1->get_qualifiers() = tq1;
118 type->get_base()->get_qualifiers() = Type::Qualifiers();
119 } // if
120 } // if
121 } // if
122 } // if
123 } // if
124#ifdef DEBUG
125 std::cout << "============= commonType" << std::endl << "type1 is ";
126 type1->print( std::cout );
127 std::cout << " type2 is ";
128 type2->print( std::cout );
129 if ( result ) {
130 std::cout << " common type is ";
131 result->print( std::cout );
132 } else {
133 std::cout << " no common type";
134 } // if
135 std::cout << std::endl;
136#endif
137 return result;
138 }
139
140 static const BasicType::Kind combinedType[ BasicType::NUMBER_OF_BASIC_TYPES ][ BasicType::NUMBER_OF_BASIC_TYPES ] =
141 {
142/* Bool Char SignedChar UnsignedChar ShortSignedInt ShortUnsignedInt SignedInt UnsignedInt LongSignedInt LongUnsignedInt LongLongSignedInt LongLongUnsignedInt Float Double LongDouble FloatComplex DoubleComplex LongDoubleComplex FloatImaginary DoubleImaginary LongDoubleImaginary */
143 /* 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 },
144 /* 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 },
145 /* 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 },
146 /* 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 },
147 /* 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 },
148 /* 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 },
149 /* 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 },
150 /* 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 },
151 /* 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 },
152 /* 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 },
153 /* 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 },
154 /* 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 },
155 /* 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 },
156 /* 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 },
157 /* 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 },
158 /* 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 },
159 /* 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 },
160 /* 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 },
161 /* 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 },
162 /* 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 },
163 /* 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 }
164 };
165
166 CommonType::CommonType( Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars )
167 : result( 0 ), type2( type2 ), widenFirst( widenFirst ), widenSecond( widenSecond ), indexer( indexer ), env( env ), openVars( openVars ) {
168 }
169
170 void CommonType::visit( __attribute((unused)) VoidType *voidType ) {}
171
172 void CommonType::visit( BasicType *basicType ) {
173 if ( BasicType *otherBasic = dynamic_cast< BasicType* >( type2 ) ) {
174 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ otherBasic->get_kind() ];
175 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= otherBasic->get_qualifiers() ) || widenFirst ) && ( ( newType == otherBasic->get_kind() && basicType->get_qualifiers() <= otherBasic->get_qualifiers() ) || widenSecond ) ) {
176 result = new BasicType( basicType->get_qualifiers() | otherBasic->get_qualifiers(), newType );
177 } // if
178 } else if ( dynamic_cast< EnumInstType * > ( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
179 // use signed int in lieu of the enum/zero/one type
180 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ BasicType::SignedInt ];
181 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= type2->get_qualifiers() ) || widenFirst ) && ( ( newType != basicType->get_kind() && basicType->get_qualifiers() <= type2->get_qualifiers() ) || widenSecond ) ) {
182 result = new BasicType( basicType->get_qualifiers() | type2->get_qualifiers(), newType );
183 } // if
184 } // if
185 }
186
187 template< typename Pointer >
188 void CommonType::getCommonWithVoidPointer( Pointer* voidPointer, Pointer* otherPointer ) {
189 if ( TypeInstType* var = dynamic_cast< TypeInstType* >( otherPointer->get_base() ) ) {
190 OpenVarSet::const_iterator entry = openVars.find( var->get_name() );
191 if ( entry != openVars.end() ) {
192 AssertionSet need, have;
193 WidenMode widen( widenFirst, widenSecond );
194 if ( entry != openVars.end() && ! bindVar(var, voidPointer->get_base(), entry->second, env, need, have, openVars, widen, indexer ) ) return;
195 }
196 }
197 result = voidPointer->clone();
198 result->get_qualifiers() |= otherPointer->get_qualifiers();
199 }
200
201 void CommonType::visit( PointerType *pointerType ) {
202 if ( PointerType *otherPointer = dynamic_cast< PointerType* >( type2 ) ) {
203 if ( widenFirst && dynamic_cast< VoidType* >( otherPointer->get_base() ) && ! isFtype(pointerType->get_base()) ) {
204 getCommonWithVoidPointer( otherPointer, pointerType );
205 } else if ( widenSecond && dynamic_cast< VoidType* >( pointerType->get_base() ) && ! isFtype(otherPointer->get_base()) ) {
206 getCommonWithVoidPointer( pointerType, otherPointer );
207 } else if ( ( pointerType->get_base()->get_qualifiers() >= otherPointer->get_base()->get_qualifiers() || widenFirst )
208 && ( pointerType->get_base()->get_qualifiers() <= otherPointer->get_base()->get_qualifiers() || widenSecond ) ) {
209 Type::Qualifiers tq1 = pointerType->get_base()->get_qualifiers(), tq2 = otherPointer->get_base()->get_qualifiers();
210 pointerType->get_base()->get_qualifiers() = Type::Qualifiers();
211 otherPointer->get_base()->get_qualifiers() = Type::Qualifiers();
212 AssertionSet have, need;
213 OpenVarSet newOpen( openVars );
214 if ( unifyExact( pointerType->get_base(), otherPointer->get_base(), env, have, need, newOpen, indexer ) ) {
215 if ( tq1 < tq2 ) {
216 result = pointerType->clone();
217 } else {
218 result = otherPointer->clone();
219 } // if
220 result->get_qualifiers() = tq1 | tq2;
221 } else {
222 /// std::cout << "place for ptr-to-type" << std::endl;
223 } // if
224 pointerType->get_base()->get_qualifiers() = tq1;
225 otherPointer->get_base()->get_qualifiers() = tq2;
226 } // if
227 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
228 result = pointerType->clone();
229 result->get_qualifiers() |= type2->get_qualifiers();
230 } // if
231 }
232
233 void CommonType::visit( __attribute((unused)) ArrayType *arrayType ) {}
234
235 void CommonType::visit( ReferenceType *refType ) {
236 if ( ReferenceType *otherRef = dynamic_cast< ReferenceType* >( type2 ) ) {
237 if ( widenFirst && dynamic_cast< VoidType* >( otherRef->get_base() ) && ! isFtype(refType->get_base()) ) {
238 getCommonWithVoidPointer( otherRef, refType );
239 } else if ( widenSecond && dynamic_cast< VoidType* >( refType->get_base() ) && ! isFtype(otherRef->get_base()) ) {
240 getCommonWithVoidPointer( refType, otherRef );
241 } else if ( ( refType->get_base()->get_qualifiers() >= otherRef->get_base()->get_qualifiers() || widenFirst )
242 && ( refType->get_base()->get_qualifiers() <= otherRef->get_base()->get_qualifiers() || widenSecond ) ) {
243 Type::Qualifiers tq1 = refType->get_base()->get_qualifiers(), tq2 = otherRef->get_base()->get_qualifiers();
244 refType->get_base()->get_qualifiers() = Type::Qualifiers();
245 otherRef->get_base()->get_qualifiers() = Type::Qualifiers();
246 AssertionSet have, need;
247 OpenVarSet newOpen( openVars );
248 if ( unifyExact( refType->get_base(), otherRef->get_base(), env, have, need, newOpen, indexer ) ) {
249 if ( tq1 < tq2 ) {
250 result = refType->clone();
251 } else {
252 result = otherRef->clone();
253 } // if
254 result->get_qualifiers() = tq1 | tq2;
255 } else {
256 /// std::cout << "place for ptr-to-type" << std::endl;
257 } // if
258 refType->get_base()->get_qualifiers() = tq1;
259 otherRef->get_base()->get_qualifiers() = tq2;
260 } // if
261 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
262 result = refType->clone();
263 result->get_qualifiers() |= type2->get_qualifiers();
264 } // if
265 }
266
267 void CommonType::visit( __attribute((unused)) FunctionType *functionType ) {}
268 void CommonType::visit( __attribute((unused)) StructInstType *aggregateUseType ) {}
269 void CommonType::visit( __attribute((unused)) UnionInstType *aggregateUseType ) {}
270
271 void CommonType::visit( EnumInstType *enumInstType ) {
272 if ( dynamic_cast< BasicType * >( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
273 // reuse BasicType, EnumInstType code by swapping type2 with enumInstType
274 ValueGuard< Type * > temp( type2 );
275 type2 = enumInstType;
276 temp.old->accept( *this );
277 } // if
278 }
279
280 void CommonType::visit( __attribute((unused)) TraitInstType *aggregateUseType ) {
281 }
282
283 void CommonType::visit( TypeInstType *inst ) {
284 if ( widenFirst ) {
285 NamedTypeDecl *nt = indexer.lookupType( inst->get_name() );
286 if ( nt ) {
287 TypeDecl *type = safe_dynamic_cast< TypeDecl* >( nt );
288 if ( type->get_base() ) {
289 Type::Qualifiers tq1 = inst->get_qualifiers(), tq2 = type2->get_qualifiers();
290 AssertionSet have, need;
291 OpenVarSet newOpen( openVars );
292 type2->get_qualifiers() = Type::Qualifiers();
293 type->get_base()->get_qualifiers() = tq1;
294 if ( unifyExact( type->get_base(), type2, env, have, need, newOpen, indexer ) ) {
295 result = type2->clone();
296 result->get_qualifiers() = tq1 | tq2;
297 } // if
298 type2->get_qualifiers() = tq2;
299 type->get_base()->get_qualifiers() = Type::Qualifiers();
300 } // if
301 } // if
302 } // if
303 }
304
305 void CommonType::visit( __attribute((unused)) TupleType *tupleType ) {}
306 void CommonType::visit( __attribute((unused)) VarArgsType *varArgsType ) {}
307
308 void CommonType::visit( ZeroType *zeroType ) {
309 if ( widenFirst ) {
310 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< PointerType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
311 if ( widenSecond || zeroType->get_qualifiers() <= type2->get_qualifiers() ) {
312 result = type2->clone();
313 result->get_qualifiers() |= zeroType->get_qualifiers();
314 }
315 } else if ( widenSecond && dynamic_cast< OneType* >( type2 ) ) {
316 result = new BasicType( zeroType->get_qualifiers(), BasicType::SignedInt );
317 result->get_qualifiers() |= type2->get_qualifiers();
318 }
319 }
320 }
321
322 void CommonType::visit( OneType *oneType ) {
323 if ( widenFirst ) {
324 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
325 if ( widenSecond || oneType->get_qualifiers() <= type2->get_qualifiers() ) {
326 result = type2->clone();
327 result->get_qualifiers() |= oneType->get_qualifiers();
328 }
329 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
330 result = new BasicType( oneType->get_qualifiers(), BasicType::SignedInt );
331 result->get_qualifiers() |= type2->get_qualifiers();
332 }
333 }
334 }
335} // namespace ResolvExpr
336
337// Local Variables: //
338// tab-width: 4 //
339// mode: c++ //
340// compile-command: "make install" //
341// End: //
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