source: src/ResolvExpr/CommonType.cc@ c470ada

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 c470ada was 000178a, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Refactor reference CommonType code
  • Property mode set to 100644
File size: 29.6 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 : Mon Sep 25 15:18:17 2017
13// Update Count : 9
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( Type * t1, Type * t2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment & env, const OpenVarSet &openVars ) {
64 Type * common = nullptr;
65 AssertionSet have, need;
66 OpenVarSet newOpen( openVars );
67 // need unify to bind type variables
68 if ( unify( t1, t2, env, have, need, newOpen, indexer, common ) ) {
69 // std::cerr << "unify success: " << widenFirst << " " << widenSecond << std::endl;
70 if ( (widenFirst || t2->get_qualifiers() <= t1->get_qualifiers()) && (widenSecond || t1->get_qualifiers() <= t2->get_qualifiers()) ) {
71 // std::cerr << "widen okay" << std::endl;
72 common->get_qualifiers() |= t1->get_qualifiers();
73 common->get_qualifiers() |= t2->get_qualifiers();
74 return common;
75 }
76 }
77 // std::cerr << "exact unify failed: " << t1 << " " << t2 << std::endl;
78 return nullptr;
79 }
80
81 Type *commonType( Type *type1, Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars ) {
82 CommonType visitor( type2, widenFirst, widenSecond, indexer, env, openVars );
83
84 int depth1 = type1->referenceDepth();
85 int depth2 = type2->referenceDepth();
86 if ( depth1 > 0 || depth2 > 0 ) {
87 int diff = depth1-depth2;
88 // 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.
89 if ( diff > 1 || diff < -1 ) return nullptr;
90
91 // special case where one type has a reference depth of 1 larger than the other
92 if ( diff > 0 || diff < 0 ) {
93 Type * result = nullptr;
94 if ( ReferenceType * ref1 = dynamic_cast< ReferenceType * >( type1 ) ) {
95 // formal is reference, so result should be reference
96 result = handleReference( ref1->base, type2, widenFirst, widenSecond, indexer, env, openVars );
97 if ( result ) result = new ReferenceType( ref1->get_qualifiers(), result );
98 } else {
99 // formal is value, so result should be value
100 ReferenceType * ref2 = strict_dynamic_cast< ReferenceType * > ( type2 );
101 result = handleReference( type1, ref2->base, widenFirst, widenSecond, indexer, env, openVars );
102 }
103 // std::cerr << "common type of reference [" << type1 << "] and [" << type2 << "] is [" << result << "]" << std::endl;
104 return result;
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 SignedInt128 UnsignedInt128 */
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, BasicType::SignedInt128, BasicType::UnsignedInt128, },
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, BasicType::SignedInt128, BasicType::UnsignedInt128, },
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, BasicType::SignedInt128, BasicType::UnsignedInt128, },
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, BasicType::SignedInt128, BasicType::UnsignedInt128, },
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, BasicType::SignedInt128, BasicType::UnsignedInt128, },
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, BasicType::SignedInt128, BasicType::UnsignedInt128, },
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, BasicType::SignedInt128, BasicType::UnsignedInt128, },
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, BasicType::SignedInt128, BasicType::UnsignedInt128, },
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, BasicType::SignedInt128, BasicType::UnsignedInt128, },
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, BasicType::SignedInt128, BasicType::UnsignedInt128, },
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, BasicType::SignedInt128, BasicType::UnsignedInt128, },
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, BasicType::SignedInt128, BasicType::UnsignedInt128, },
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, BasicType::Float, BasicType::Float, },
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, BasicType::Double, BasicType::Double, },
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, BasicType::LongDouble, BasicType::LongDouble, },
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, BasicType::FloatComplex, BasicType::FloatComplex, },
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, BasicType::DoubleComplex, BasicType::DoubleComplex, },
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, 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, BasicType::FloatImaginary, BasicType::FloatImaginary, },
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, BasicType::DoubleImaginary, BasicType::DoubleImaginary, },
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 /* SignedInt128 */ { BasicType::SignedInt128, BasicType::SignedInt128, BasicType::SignedInt128, BasicType::SignedInt128, BasicType::SignedInt128, BasicType::SignedInt128, BasicType::SignedInt128, BasicType::SignedInt128, BasicType::SignedInt128, BasicType::SignedInt128, BasicType::SignedInt128, BasicType::SignedInt128, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::SignedInt128, BasicType::UnsignedInt128, },
175 /* UnsignedInt128 */ { BasicType::UnsignedInt128, BasicType::UnsignedInt128, BasicType::UnsignedInt128, BasicType::UnsignedInt128, BasicType::UnsignedInt128, BasicType::UnsignedInt128, BasicType::UnsignedInt128, BasicType::UnsignedInt128, BasicType::UnsignedInt128, BasicType::UnsignedInt128, BasicType::UnsignedInt128, BasicType::UnsignedInt128, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::UnsignedInt128, BasicType::UnsignedInt128, },
176 };
177
178 CommonType::CommonType( Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars )
179 : result( 0 ), type2( type2 ), widenFirst( widenFirst ), widenSecond( widenSecond ), indexer( indexer ), env( env ), openVars( openVars ) {
180 }
181
182 void CommonType::visit( __attribute((unused)) VoidType *voidType ) {}
183
184 void CommonType::visit( BasicType *basicType ) {
185 if ( BasicType *otherBasic = dynamic_cast< BasicType* >( type2 ) ) {
186 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ otherBasic->get_kind() ];
187 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= otherBasic->get_qualifiers() ) || widenFirst ) && ( ( newType == otherBasic->get_kind() && basicType->get_qualifiers() <= otherBasic->get_qualifiers() ) || widenSecond ) ) {
188 result = new BasicType( basicType->get_qualifiers() | otherBasic->get_qualifiers(), newType );
189 } // if
190 } else if ( dynamic_cast< EnumInstType * > ( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
191 // use signed int in lieu of the enum/zero/one type
192 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ BasicType::SignedInt ];
193 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= type2->get_qualifiers() ) || widenFirst ) && ( ( newType != basicType->get_kind() && basicType->get_qualifiers() <= type2->get_qualifiers() ) || widenSecond ) ) {
194 result = new BasicType( basicType->get_qualifiers() | type2->get_qualifiers(), newType );
195 } // if
196 } // if
197 }
198
199 template< typename Pointer >
200 void CommonType::getCommonWithVoidPointer( Pointer* voidPointer, Pointer* otherPointer ) {
201 if ( TypeInstType* var = dynamic_cast< TypeInstType* >( otherPointer->get_base() ) ) {
202 OpenVarSet::const_iterator entry = openVars.find( var->get_name() );
203 if ( entry != openVars.end() ) {
204 AssertionSet need, have;
205 WidenMode widen( widenFirst, widenSecond );
206 if ( entry != openVars.end() && ! bindVar(var, voidPointer->get_base(), entry->second, env, need, have, openVars, widen, indexer ) ) return;
207 }
208 }
209 result = voidPointer->clone();
210 result->get_qualifiers() |= otherPointer->get_qualifiers();
211 }
212
213 void CommonType::visit( PointerType *pointerType ) {
214 if ( PointerType *otherPointer = dynamic_cast< PointerType* >( type2 ) ) {
215 // std::cerr << "commonType: two pointers: " << pointerType << " / " << otherPointer << std::endl;
216 if ( widenFirst && dynamic_cast< VoidType* >( otherPointer->get_base() ) && ! isFtype(pointerType->get_base()) ) {
217 getCommonWithVoidPointer( otherPointer, pointerType );
218 } else if ( widenSecond && dynamic_cast< VoidType* >( pointerType->get_base() ) && ! isFtype(otherPointer->get_base()) ) {
219 getCommonWithVoidPointer( pointerType, otherPointer );
220 } else if ( ( pointerType->get_base()->get_qualifiers() >= otherPointer->get_base()->get_qualifiers() || widenFirst )
221 && ( pointerType->get_base()->get_qualifiers() <= otherPointer->get_base()->get_qualifiers() || widenSecond ) ) {
222 // std::cerr << "middle case" << std::endl;
223 Type::Qualifiers tq1 = pointerType->get_base()->get_qualifiers(), tq2 = otherPointer->get_base()->get_qualifiers();
224 pointerType->get_base()->get_qualifiers() = Type::Qualifiers();
225 otherPointer->get_base()->get_qualifiers() = Type::Qualifiers();
226 AssertionSet have, need;
227 OpenVarSet newOpen( openVars );
228 if ( unifyExact( pointerType->get_base(), otherPointer->get_base(), env, have, need, newOpen, indexer ) ) {
229 // std::cerr << "unifyExact success" << std::endl;
230 if ( tq1 < tq2 ) {
231 result = pointerType->clone();
232 } else {
233 result = otherPointer->clone();
234 } // if
235 result->get_qualifiers() = tq1 | tq2;
236 } else {
237 /// std::cerr << "place for ptr-to-type" << std::endl;
238 } // if
239 pointerType->get_base()->get_qualifiers() = tq1;
240 otherPointer->get_base()->get_qualifiers() = tq2;
241 } // if
242 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
243 result = pointerType->clone();
244 result->get_qualifiers() |= type2->get_qualifiers();
245 } // if
246 }
247
248 void CommonType::visit( __attribute((unused)) ArrayType *arrayType ) {}
249
250 void CommonType::visit( ReferenceType *refType ) {
251 if ( ReferenceType *otherRef = dynamic_cast< ReferenceType* >( type2 ) ) {
252 // std::cerr << "commonType: both references: " << refType << " / " << otherRef << std::endl;
253 // 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;
254 if ( widenFirst && dynamic_cast< VoidType* >( otherRef->get_base() ) && ! isFtype(refType->get_base()) ) {
255 getCommonWithVoidPointer( otherRef, refType );
256 } else if ( widenSecond && dynamic_cast< VoidType* >( refType->get_base() ) && ! isFtype(otherRef->get_base()) ) {
257 getCommonWithVoidPointer( refType, otherRef );
258 } else if ( ( refType->get_base()->get_qualifiers() >= otherRef->get_base()->get_qualifiers() || widenFirst )
259 && ( refType->get_base()->get_qualifiers() <= otherRef->get_base()->get_qualifiers() || widenSecond ) ) {
260 // std::cerr << "middle case" << std::endl;
261 Type::Qualifiers tq1 = refType->get_base()->get_qualifiers(), tq2 = otherRef->get_base()->get_qualifiers();
262 refType->get_base()->get_qualifiers() = Type::Qualifiers();
263 otherRef->get_base()->get_qualifiers() = Type::Qualifiers();
264 AssertionSet have, need;
265 OpenVarSet newOpen( openVars );
266 if ( unifyExact( refType->get_base(), otherRef->get_base(), env, have, need, newOpen, indexer ) ) {
267 if ( tq1 < tq2 ) {
268 result = refType->clone();
269 } else {
270 result = otherRef->clone();
271 } // if
272 result->get_qualifiers() = tq1 | tq2;
273 } else {
274 /// std::cerr << "place for ptr-to-type" << std::endl;
275 } // if
276 refType->get_base()->get_qualifiers() = tq1;
277 otherRef->get_base()->get_qualifiers() = tq2;
278 } // if
279 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
280 result = refType->clone();
281 result->get_qualifiers() |= type2->get_qualifiers();
282 } // if
283 }
284
285 void CommonType::visit( __attribute((unused)) FunctionType *functionType ) {}
286 void CommonType::visit( __attribute((unused)) StructInstType *aggregateUseType ) {}
287 void CommonType::visit( __attribute((unused)) UnionInstType *aggregateUseType ) {}
288
289 void CommonType::visit( EnumInstType *enumInstType ) {
290 if ( dynamic_cast< BasicType * >( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
291 // reuse BasicType, EnumInstType code by swapping type2 with enumInstType
292 ValueGuard< Type * > temp( type2 );
293 type2 = enumInstType;
294 temp.old->accept( *this );
295 } // if
296 }
297
298 void CommonType::visit( __attribute((unused)) TraitInstType *aggregateUseType ) {
299 }
300
301 void CommonType::visit( TypeInstType *inst ) {
302 if ( widenFirst ) {
303 NamedTypeDecl *nt = indexer.lookupType( inst->get_name() );
304 if ( nt ) {
305 TypeDecl *type = strict_dynamic_cast< TypeDecl* >( nt );
306 if ( type->get_base() ) {
307 Type::Qualifiers tq1 = inst->get_qualifiers(), tq2 = type2->get_qualifiers();
308 AssertionSet have, need;
309 OpenVarSet newOpen( openVars );
310 type2->get_qualifiers() = Type::Qualifiers();
311 type->get_base()->get_qualifiers() = tq1;
312 if ( unifyExact( type->get_base(), type2, env, have, need, newOpen, indexer ) ) {
313 result = type2->clone();
314 result->get_qualifiers() = tq1 | tq2;
315 } // if
316 type2->get_qualifiers() = tq2;
317 type->get_base()->get_qualifiers() = Type::Qualifiers();
318 } // if
319 } // if
320 } // if
321 }
322
323 void CommonType::visit( __attribute((unused)) TupleType *tupleType ) {}
324 void CommonType::visit( __attribute((unused)) VarArgsType *varArgsType ) {}
325
326 void CommonType::visit( ZeroType *zeroType ) {
327 if ( widenFirst ) {
328 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< PointerType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
329 if ( widenSecond || zeroType->get_qualifiers() <= type2->get_qualifiers() ) {
330 result = type2->clone();
331 result->get_qualifiers() |= zeroType->get_qualifiers();
332 }
333 } else if ( widenSecond && dynamic_cast< OneType* >( type2 ) ) {
334 result = new BasicType( zeroType->get_qualifiers(), BasicType::SignedInt );
335 result->get_qualifiers() |= type2->get_qualifiers();
336 }
337 }
338 }
339
340 void CommonType::visit( OneType *oneType ) {
341 if ( widenFirst ) {
342 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
343 if ( widenSecond || oneType->get_qualifiers() <= type2->get_qualifiers() ) {
344 result = type2->clone();
345 result->get_qualifiers() |= oneType->get_qualifiers();
346 }
347 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
348 result = new BasicType( oneType->get_qualifiers(), BasicType::SignedInt );
349 result->get_qualifiers() |= type2->get_qualifiers();
350 }
351 }
352 }
353} // namespace ResolvExpr
354
355// Local Variables: //
356// tab-width: 4 //
357// mode: c++ //
358// compile-command: "make install" //
359// End: //
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