source: src/ResolvExpr/CommonType.cc@ 76a395a

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 76a395a was e3e16bc, checked in by Thierry Delisle <tdelisle@…>, 8 years ago

Renamed safe_dynamic_cast to strict_dynamic_cast
  • Property mode set to 100644
File size: 27.3 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 <cassert> // for strict_dynamic_cast
17#include <map> // for _Rb_tree_const_iterator
18#include <utility> // for pair
19
20#include "ResolvExpr/TypeEnvironment.h" // for OpenVarSet, AssertionSet
21#include "SymTab/Indexer.h" // for Indexer
22#include "SynTree/Declaration.h" // for TypeDecl, NamedTypeDecl (ptr...
23#include "SynTree/Type.h" // for BasicType, BasicType::Kind::...
24#include "SynTree/Visitor.h" // for Visitor
25#include "Unify.h" // for unifyExact, bindVar, WidenMode
26#include "typeops.h" // for isFtype
27
28// #define DEBUG
29
30namespace ResolvExpr {
31 class CommonType : public Visitor {
32 public:
33 CommonType( Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars );
34 Type *get_result() const { return result; }
35 private:
36 virtual void visit( VoidType *voidType );
37 virtual void visit( BasicType *basicType );
38 virtual void visit( PointerType *pointerType );
39 virtual void visit( ArrayType *arrayType );
40 virtual void visit( ReferenceType *refType );
41 virtual void visit( FunctionType *functionType );
42 virtual void visit( StructInstType *aggregateUseType );
43 virtual void visit( UnionInstType *aggregateUseType );
44 virtual void visit( EnumInstType *aggregateUseType );
45 virtual void visit( TraitInstType *aggregateUseType );
46 virtual void visit( TypeInstType *aggregateUseType );
47 virtual void visit( TupleType *tupleType );
48 virtual void visit( VarArgsType *varArgsType );
49 virtual void visit( ZeroType *zeroType );
50 virtual void visit( OneType *oneType );
51
52 template< typename Pointer > void getCommonWithVoidPointer( Pointer* voidPointer, Pointer* otherPointer );
53 template< typename RefType > void handleRefType( RefType *inst, Type *other );
54
55 Type *result;
56 Type *type2; // inherited
57 bool widenFirst, widenSecond;
58 const SymTab::Indexer &indexer;
59 TypeEnvironment &env;
60 const OpenVarSet &openVars;
61 };
62
63 Type * handleReference( ReferenceType * refType, Type * other, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment & env, const OpenVarSet &openVars ) {
64 Type * result = nullptr, * common = nullptr;
65 AssertionSet have, need;
66 OpenVarSet newOpen( openVars );
67 // need unify to bind type variables
68 if ( unify( refType->get_base(), other, env, have, need, newOpen, indexer, common ) ) {
69 // std::cerr << "unify success" << std::endl;
70 if ( widenSecond ) {
71 // std::cerr << "widen second" << std::endl;
72 if ( widenFirst || other->get_qualifiers() <= refType->get_qualifiers() ) {
73 result = new ReferenceType( refType->get_qualifiers(), common ); // refType->clone();
74 result->get_qualifiers() |= other->get_qualifiers();
75 }
76 } else if ( widenFirst ) {
77 // std::cerr << "widen first" << std::endl;
78 if ( widenSecond || refType->get_qualifiers() <= other->get_qualifiers() ) {
79 result = common;
80 result->get_qualifiers() |= refType->get_qualifiers();
81 }
82 }
83 } else {
84 // std::cerr << "exact unify failed: " << refType << " " << other << std::endl;
85 }
86 // std::cerr << "common type of reference [" << refType << "] and non-reference [" << other << "] is [" << result << "]" << std::endl;
87 return result;
88 }
89
90 Type *commonType( Type *type1, Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars ) {
91 CommonType visitor( type2, widenFirst, widenSecond, indexer, env, openVars );
92
93 int depth1 = type1->referenceDepth();
94 int depth2 = type2->referenceDepth();
95 if ( depth1 > 0 || depth2 > 0 ) {
96 int diff = depth1-depth2;
97 // 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.
98 if ( diff > 1 || diff < -1 ) return nullptr;
99
100 // special case where one type has a reference depth of 1 larger than the other
101 if ( diff > 0 ) {
102 return handleReference( strict_dynamic_cast<ReferenceType *>( type1 ), type2, widenFirst, widenSecond, indexer, env, openVars );
103 } else if ( diff < 0 ) {
104 return handleReference( strict_dynamic_cast<ReferenceType *>( type2 ), type1, widenSecond, widenFirst, indexer, env, openVars );
105 }
106 // otherwise, both are reference types of the same depth and this is handled by the CommonType visitor.
107 }
108
109 type1->accept( visitor );
110 Type *result = visitor.get_result();
111 if ( ! result ) {
112 // this appears to be handling for opaque type declarations
113 if ( widenSecond ) {
114 if ( TypeInstType *inst = dynamic_cast< TypeInstType* >( type2 ) ) {
115 if ( NamedTypeDecl *nt = indexer.lookupType( inst->get_name() ) ) {
116 TypeDecl *type = strict_dynamic_cast< TypeDecl* >( nt );
117 if ( type->get_base() ) {
118 Type::Qualifiers tq1 = type1->get_qualifiers(), tq2 = type2->get_qualifiers();
119 AssertionSet have, need;
120 OpenVarSet newOpen( openVars );
121 type1->get_qualifiers() = Type::Qualifiers();
122 type->get_base()->get_qualifiers() = tq1;
123 if ( unifyExact( type1, type->get_base(), env, have, need, newOpen, indexer ) ) {
124 result = type1->clone();
125 result->get_qualifiers() = tq1 | tq2;
126 } // if
127 type1->get_qualifiers() = tq1;
128 type->get_base()->get_qualifiers() = Type::Qualifiers();
129 } // if
130 } // if
131 } // if
132 } // if
133 } // if
134#ifdef DEBUG
135 std::cerr << "============= commonType" << std::endl << "type1 is ";
136 type1->print( std::cerr );
137 std::cerr << " type2 is ";
138 type2->print( std::cerr );
139 if ( result ) {
140 std::cerr << " common type is ";
141 result->print( std::cerr );
142 } else {
143 std::cerr << " no common type";
144 } // if
145 std::cerr << std::endl;
146#endif
147 return result;
148 }
149
150 static const BasicType::Kind combinedType[ BasicType::NUMBER_OF_BASIC_TYPES ][ BasicType::NUMBER_OF_BASIC_TYPES ] =
151 {
152/* Bool Char SignedChar UnsignedChar ShortSignedInt ShortUnsignedInt SignedInt UnsignedInt LongSignedInt LongUnsignedInt LongLongSignedInt LongLongUnsignedInt Float Double LongDouble FloatComplex DoubleComplex LongDoubleComplex FloatImaginary DoubleImaginary LongDoubleImaginary */
153 /* 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 },
154 /* 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 },
155 /* 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 },
156 /* 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 },
157 /* 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 },
158 /* 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 },
159 /* 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 },
160 /* 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 },
161 /* 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 },
162 /* 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 },
163 /* 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 },
164 /* 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 },
165 /* 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 },
166 /* 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 },
167 /* 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 },
168 /* 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 },
169 /* 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 },
170 /* 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 },
171 /* 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 },
172 /* 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 },
173 /* 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 }
174 };
175
176 CommonType::CommonType( Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars )
177 : result( 0 ), type2( type2 ), widenFirst( widenFirst ), widenSecond( widenSecond ), indexer( indexer ), env( env ), openVars( openVars ) {
178 }
179
180 void CommonType::visit( __attribute((unused)) VoidType *voidType ) {}
181
182 void CommonType::visit( BasicType *basicType ) {
183 if ( BasicType *otherBasic = dynamic_cast< BasicType* >( type2 ) ) {
184 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ otherBasic->get_kind() ];
185 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= otherBasic->get_qualifiers() ) || widenFirst ) && ( ( newType == otherBasic->get_kind() && basicType->get_qualifiers() <= otherBasic->get_qualifiers() ) || widenSecond ) ) {
186 result = new BasicType( basicType->get_qualifiers() | otherBasic->get_qualifiers(), newType );
187 } // if
188 } else if ( dynamic_cast< EnumInstType * > ( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
189 // use signed int in lieu of the enum/zero/one type
190 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ BasicType::SignedInt ];
191 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= type2->get_qualifiers() ) || widenFirst ) && ( ( newType != basicType->get_kind() && basicType->get_qualifiers() <= type2->get_qualifiers() ) || widenSecond ) ) {
192 result = new BasicType( basicType->get_qualifiers() | type2->get_qualifiers(), newType );
193 } // if
194 } // if
195 }
196
197 template< typename Pointer >
198 void CommonType::getCommonWithVoidPointer( Pointer* voidPointer, Pointer* otherPointer ) {
199 if ( TypeInstType* var = dynamic_cast< TypeInstType* >( otherPointer->get_base() ) ) {
200 OpenVarSet::const_iterator entry = openVars.find( var->get_name() );
201 if ( entry != openVars.end() ) {
202 AssertionSet need, have;
203 WidenMode widen( widenFirst, widenSecond );
204 if ( entry != openVars.end() && ! bindVar(var, voidPointer->get_base(), entry->second, env, need, have, openVars, widen, indexer ) ) return;
205 }
206 }
207 result = voidPointer->clone();
208 result->get_qualifiers() |= otherPointer->get_qualifiers();
209 }
210
211 void CommonType::visit( PointerType *pointerType ) {
212 if ( PointerType *otherPointer = dynamic_cast< PointerType* >( type2 ) ) {
213 // std::cerr << "commonType: two pointers: " << pointerType << " / " << otherPointer << std::endl;
214 if ( widenFirst && dynamic_cast< VoidType* >( otherPointer->get_base() ) && ! isFtype(pointerType->get_base()) ) {
215 getCommonWithVoidPointer( otherPointer, pointerType );
216 } else if ( widenSecond && dynamic_cast< VoidType* >( pointerType->get_base() ) && ! isFtype(otherPointer->get_base()) ) {
217 getCommonWithVoidPointer( pointerType, otherPointer );
218 } else if ( ( pointerType->get_base()->get_qualifiers() >= otherPointer->get_base()->get_qualifiers() || widenFirst )
219 && ( pointerType->get_base()->get_qualifiers() <= otherPointer->get_base()->get_qualifiers() || widenSecond ) ) {
220 // std::cerr << "middle case" << std::endl;
221 Type::Qualifiers tq1 = pointerType->get_base()->get_qualifiers(), tq2 = otherPointer->get_base()->get_qualifiers();
222 pointerType->get_base()->get_qualifiers() = Type::Qualifiers();
223 otherPointer->get_base()->get_qualifiers() = Type::Qualifiers();
224 AssertionSet have, need;
225 OpenVarSet newOpen( openVars );
226 if ( unifyExact( pointerType->get_base(), otherPointer->get_base(), env, have, need, newOpen, indexer ) ) {
227 // std::cerr << "unifyExact success" << std::endl;
228 if ( tq1 < tq2 ) {
229 result = pointerType->clone();
230 } else {
231 result = otherPointer->clone();
232 } // if
233 result->get_qualifiers() = tq1 | tq2;
234 } else {
235 /// std::cerr << "place for ptr-to-type" << std::endl;
236 } // if
237 pointerType->get_base()->get_qualifiers() = tq1;
238 otherPointer->get_base()->get_qualifiers() = tq2;
239 } // if
240 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
241 result = pointerType->clone();
242 result->get_qualifiers() |= type2->get_qualifiers();
243 } // if
244 }
245
246 void CommonType::visit( __attribute((unused)) ArrayType *arrayType ) {}
247
248 void CommonType::visit( ReferenceType *refType ) {
249 if ( ReferenceType *otherRef = dynamic_cast< ReferenceType* >( type2 ) ) {
250 // std::cerr << "commonType: both references: " << refType << " / " << otherRef << std::endl;
251 // std::cerr << ( refType->get_base()->get_qualifiers() >= otherRef->get_base()->get_qualifiers() || widenFirst ) << (refType->get_base()->get_qualifiers() <= otherRef->get_base()->get_qualifiers() || widenSecond) << std::endl;
252 if ( widenFirst && dynamic_cast< VoidType* >( otherRef->get_base() ) && ! isFtype(refType->get_base()) ) {
253 getCommonWithVoidPointer( otherRef, refType );
254 } else if ( widenSecond && dynamic_cast< VoidType* >( refType->get_base() ) && ! isFtype(otherRef->get_base()) ) {
255 getCommonWithVoidPointer( refType, otherRef );
256 } else if ( ( refType->get_base()->get_qualifiers() >= otherRef->get_base()->get_qualifiers() || widenFirst )
257 && ( refType->get_base()->get_qualifiers() <= otherRef->get_base()->get_qualifiers() || widenSecond ) ) {
258 // std::cerr << "middle case" << std::endl;
259 Type::Qualifiers tq1 = refType->get_base()->get_qualifiers(), tq2 = otherRef->get_base()->get_qualifiers();
260 refType->get_base()->get_qualifiers() = Type::Qualifiers();
261 otherRef->get_base()->get_qualifiers() = Type::Qualifiers();
262 AssertionSet have, need;
263 OpenVarSet newOpen( openVars );
264 if ( unifyExact( refType->get_base(), otherRef->get_base(), env, have, need, newOpen, indexer ) ) {
265 if ( tq1 < tq2 ) {
266 result = refType->clone();
267 } else {
268 result = otherRef->clone();
269 } // if
270 result->get_qualifiers() = tq1 | tq2;
271 } else {
272 /// std::cerr << "place for ptr-to-type" << std::endl;
273 } // if
274 refType->get_base()->get_qualifiers() = tq1;
275 otherRef->get_base()->get_qualifiers() = tq2;
276 } // if
277 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
278 result = refType->clone();
279 result->get_qualifiers() |= type2->get_qualifiers();
280 } // if
281 }
282
283 void CommonType::visit( __attribute((unused)) FunctionType *functionType ) {}
284 void CommonType::visit( __attribute((unused)) StructInstType *aggregateUseType ) {}
285 void CommonType::visit( __attribute((unused)) UnionInstType *aggregateUseType ) {}
286
287 void CommonType::visit( EnumInstType *enumInstType ) {
288 if ( dynamic_cast< BasicType * >( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
289 // reuse BasicType, EnumInstType code by swapping type2 with enumInstType
290 ValueGuard< Type * > temp( type2 );
291 type2 = enumInstType;
292 temp.old->accept( *this );
293 } // if
294 }
295
296 void CommonType::visit( __attribute((unused)) TraitInstType *aggregateUseType ) {
297 }
298
299 void CommonType::visit( TypeInstType *inst ) {
300 if ( widenFirst ) {
301 NamedTypeDecl *nt = indexer.lookupType( inst->get_name() );
302 if ( nt ) {
303 TypeDecl *type = strict_dynamic_cast< TypeDecl* >( nt );
304 if ( type->get_base() ) {
305 Type::Qualifiers tq1 = inst->get_qualifiers(), tq2 = type2->get_qualifiers();
306 AssertionSet have, need;
307 OpenVarSet newOpen( openVars );
308 type2->get_qualifiers() = Type::Qualifiers();
309 type->get_base()->get_qualifiers() = tq1;
310 if ( unifyExact( type->get_base(), type2, env, have, need, newOpen, indexer ) ) {
311 result = type2->clone();
312 result->get_qualifiers() = tq1 | tq2;
313 } // if
314 type2->get_qualifiers() = tq2;
315 type->get_base()->get_qualifiers() = Type::Qualifiers();
316 } // if
317 } // if
318 } // if
319 }
320
321 void CommonType::visit( __attribute((unused)) TupleType *tupleType ) {}
322 void CommonType::visit( __attribute((unused)) VarArgsType *varArgsType ) {}
323
324 void CommonType::visit( ZeroType *zeroType ) {
325 if ( widenFirst ) {
326 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< PointerType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
327 if ( widenSecond || zeroType->get_qualifiers() <= type2->get_qualifiers() ) {
328 result = type2->clone();
329 result->get_qualifiers() |= zeroType->get_qualifiers();
330 }
331 } else if ( widenSecond && dynamic_cast< OneType* >( type2 ) ) {
332 result = new BasicType( zeroType->get_qualifiers(), BasicType::SignedInt );
333 result->get_qualifiers() |= type2->get_qualifiers();
334 }
335 }
336 }
337
338 void CommonType::visit( OneType *oneType ) {
339 if ( widenFirst ) {
340 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
341 if ( widenSecond || oneType->get_qualifiers() <= type2->get_qualifiers() ) {
342 result = type2->clone();
343 result->get_qualifiers() |= oneType->get_qualifiers();
344 }
345 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
346 result = new BasicType( oneType->get_qualifiers(), BasicType::SignedInt );
347 result->get_qualifiers() |= type2->get_qualifiers();
348 }
349 }
350 }
351} // namespace ResolvExpr
352
353// Local Variables: //
354// tab-width: 4 //
355// mode: c++ //
356// compile-command: "make install" //
357// End: //
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