source: src/ResolvExpr/CommonType.cc@ ce7ed2c

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 ce7ed2c was ecd4923, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Remove unnecessary attribute unused
  • Property mode set to 100644
File size: 29.5 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 // std::cerr << "reference depth diff: " << diff << std::endl;
94 Type * result = nullptr;
95 ReferenceType * ref1 = dynamic_cast< ReferenceType * >( type1 );
96 ReferenceType * ref2 = dynamic_cast< ReferenceType * >( type2 );
97 if ( diff > 0 ) {
98 // deeper on the left
99 assert( ref1 );
100 result = handleReference( ref1->base, type2, widenFirst, widenSecond, indexer, env, openVars );
101 } else {
102 // deeper on the right
103 assert( ref2 );
104 result = handleReference( type1, ref2->base, widenFirst, widenSecond, indexer, env, openVars );
105 }
106 if ( result && ref1 ) {
107 // formal is reference, so result should be reference
108 // std::cerr << "formal is reference; result should be reference" << std::endl;
109 result = new ReferenceType( ref1->get_qualifiers(), result );
110 }
111 // std::cerr << "common type of reference [" << type1 << "] and [" << type2 << "] is [" << result << "]" << std::endl;
112 return result;
113 }
114 // otherwise, both are reference types of the same depth and this is handled by the CommonType visitor.
115 }
116
117 type1->accept( visitor );
118 Type *result = visitor.get_result();
119 if ( ! result ) {
120 // this appears to be handling for opaque type declarations
121 if ( widenSecond ) {
122 if ( TypeInstType *inst = dynamic_cast< TypeInstType* >( type2 ) ) {
123 if ( NamedTypeDecl *nt = indexer.lookupType( inst->get_name() ) ) {
124 TypeDecl *type = strict_dynamic_cast< TypeDecl* >( nt );
125 if ( type->get_base() ) {
126 Type::Qualifiers tq1 = type1->get_qualifiers(), tq2 = type2->get_qualifiers();
127 AssertionSet have, need;
128 OpenVarSet newOpen( openVars );
129 type1->get_qualifiers() = Type::Qualifiers();
130 type->get_base()->get_qualifiers() = tq1;
131 if ( unifyExact( type1, type->get_base(), env, have, need, newOpen, indexer ) ) {
132 result = type1->clone();
133 result->get_qualifiers() = tq1 | tq2;
134 } // if
135 type1->get_qualifiers() = tq1;
136 type->get_base()->get_qualifiers() = Type::Qualifiers();
137 } // if
138 } // if
139 } // if
140 } // if
141 } // if
142#ifdef DEBUG
143 std::cerr << "============= commonType" << std::endl << "type1 is ";
144 type1->print( std::cerr );
145 std::cerr << " type2 is ";
146 type2->print( std::cerr );
147 if ( result ) {
148 std::cerr << " common type is ";
149 result->print( std::cerr );
150 } else {
151 std::cerr << " no common type";
152 } // if
153 std::cerr << std::endl;
154#endif
155 return result;
156 }
157
158 static const BasicType::Kind combinedType[ BasicType::NUMBER_OF_BASIC_TYPES ][ BasicType::NUMBER_OF_BASIC_TYPES ] =
159 {
160/* Bool Char SignedChar UnsignedChar ShortSignedInt ShortUnsignedInt SignedInt UnsignedInt LongSignedInt LongUnsignedInt LongLongSignedInt LongLongUnsignedInt Float Double LongDouble FloatComplex DoubleComplex LongDoubleComplex FloatImaginary DoubleImaginary LongDoubleImaginary SignedInt128 UnsignedInt128 */
161 /* 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, },
162 /* 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, },
163 /* 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, },
164 /* 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, },
165 /* 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, },
166 /* 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, },
167 /* 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, },
168 /* 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, },
169 /* 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, },
170 /* 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, },
171 /* 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, },
172 /* 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, },
173 /* 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, },
174 /* 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, },
175 /* 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, },
176 /* 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, },
177 /* 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, },
178 /* 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, },
179 /* 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, },
180 /* 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, },
181 /* 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 },
182 /* 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, },
183 /* 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, },
184 };
185
186 CommonType::CommonType( Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars )
187 : result( 0 ), type2( type2 ), widenFirst( widenFirst ), widenSecond( widenSecond ), indexer( indexer ), env( env ), openVars( openVars ) {
188 }
189
190 void CommonType::visit( VoidType * ) {}
191
192 void CommonType::visit( BasicType *basicType ) {
193 if ( BasicType *otherBasic = dynamic_cast< BasicType* >( type2 ) ) {
194 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ otherBasic->get_kind() ];
195 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= otherBasic->get_qualifiers() ) || widenFirst ) && ( ( newType == otherBasic->get_kind() && basicType->get_qualifiers() <= otherBasic->get_qualifiers() ) || widenSecond ) ) {
196 result = new BasicType( basicType->get_qualifiers() | otherBasic->get_qualifiers(), newType );
197 } // if
198 } else if ( dynamic_cast< EnumInstType * > ( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
199 // use signed int in lieu of the enum/zero/one type
200 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ BasicType::SignedInt ];
201 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= type2->get_qualifiers() ) || widenFirst ) && ( ( newType != basicType->get_kind() && basicType->get_qualifiers() <= type2->get_qualifiers() ) || widenSecond ) ) {
202 result = new BasicType( basicType->get_qualifiers() | type2->get_qualifiers(), newType );
203 } // if
204 } // if
205 }
206
207 template< typename Pointer >
208 void CommonType::getCommonWithVoidPointer( Pointer* voidPointer, Pointer* otherPointer ) {
209 if ( TypeInstType* var = dynamic_cast< TypeInstType* >( otherPointer->get_base() ) ) {
210 OpenVarSet::const_iterator entry = openVars.find( var->get_name() );
211 if ( entry != openVars.end() ) {
212 AssertionSet need, have;
213 WidenMode widen( widenFirst, widenSecond );
214 if ( entry != openVars.end() && ! bindVar(var, voidPointer->get_base(), entry->second, env, need, have, openVars, widen, indexer ) ) return;
215 }
216 }
217 result = voidPointer->clone();
218 result->get_qualifiers() |= otherPointer->get_qualifiers();
219 }
220
221 void CommonType::visit( PointerType *pointerType ) {
222 if ( PointerType *otherPointer = dynamic_cast< PointerType* >( type2 ) ) {
223 // std::cerr << "commonType: two pointers: " << pointerType << " / " << otherPointer << std::endl;
224 if ( widenFirst && dynamic_cast< VoidType* >( otherPointer->get_base() ) && ! isFtype(pointerType->get_base()) ) {
225 getCommonWithVoidPointer( otherPointer, pointerType );
226 } else if ( widenSecond && dynamic_cast< VoidType* >( pointerType->get_base() ) && ! isFtype(otherPointer->get_base()) ) {
227 getCommonWithVoidPointer( pointerType, otherPointer );
228 } else if ( ( pointerType->get_base()->get_qualifiers() >= otherPointer->get_base()->get_qualifiers() || widenFirst )
229 && ( pointerType->get_base()->get_qualifiers() <= otherPointer->get_base()->get_qualifiers() || widenSecond ) ) {
230 // std::cerr << "middle case" << std::endl;
231 Type::Qualifiers tq1 = pointerType->get_base()->get_qualifiers(), tq2 = otherPointer->get_base()->get_qualifiers();
232 pointerType->get_base()->get_qualifiers() = Type::Qualifiers();
233 otherPointer->get_base()->get_qualifiers() = Type::Qualifiers();
234 AssertionSet have, need;
235 OpenVarSet newOpen( openVars );
236 if ( unifyExact( pointerType->get_base(), otherPointer->get_base(), env, have, need, newOpen, indexer ) ) {
237 // std::cerr << "unifyExact success" << std::endl;
238 if ( tq1 < tq2 ) {
239 result = pointerType->clone();
240 } else {
241 result = otherPointer->clone();
242 } // if
243 result->get_qualifiers() = tq1 | tq2;
244 } else {
245 /// std::cerr << "place for ptr-to-type" << std::endl;
246 } // if
247 pointerType->get_base()->get_qualifiers() = tq1;
248 otherPointer->get_base()->get_qualifiers() = tq2;
249 } // if
250 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
251 result = pointerType->clone();
252 result->get_qualifiers() |= type2->get_qualifiers();
253 } // if
254 }
255
256 void CommonType::visit( ArrayType * ) {}
257
258 void CommonType::visit( ReferenceType *refType ) {
259 if ( ReferenceType *otherRef = dynamic_cast< ReferenceType* >( type2 ) ) {
260 // std::cerr << "commonType: both references: " << refType << " / " << otherRef << std::endl;
261 // 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;
262 if ( widenFirst && dynamic_cast< VoidType* >( otherRef->get_base() ) && ! isFtype(refType->get_base()) ) {
263 getCommonWithVoidPointer( otherRef, refType );
264 } else if ( widenSecond && dynamic_cast< VoidType* >( refType->get_base() ) && ! isFtype(otherRef->get_base()) ) {
265 getCommonWithVoidPointer( refType, otherRef );
266 } else if ( ( refType->get_base()->get_qualifiers() >= otherRef->get_base()->get_qualifiers() || widenFirst )
267 && ( refType->get_base()->get_qualifiers() <= otherRef->get_base()->get_qualifiers() || widenSecond ) ) {
268 // std::cerr << "middle case" << std::endl;
269 Type::Qualifiers tq1 = refType->get_base()->get_qualifiers(), tq2 = otherRef->get_base()->get_qualifiers();
270 refType->get_base()->get_qualifiers() = Type::Qualifiers();
271 otherRef->get_base()->get_qualifiers() = Type::Qualifiers();
272 AssertionSet have, need;
273 OpenVarSet newOpen( openVars );
274 if ( unifyExact( refType->get_base(), otherRef->get_base(), env, have, need, newOpen, indexer ) ) {
275 if ( tq1 < tq2 ) {
276 result = refType->clone();
277 } else {
278 result = otherRef->clone();
279 } // if
280 result->get_qualifiers() = tq1 | tq2;
281 } else {
282 /// std::cerr << "place for ptr-to-type" << std::endl;
283 } // if
284 refType->get_base()->get_qualifiers() = tq1;
285 otherRef->get_base()->get_qualifiers() = tq2;
286 } // if
287 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
288 result = refType->clone();
289 result->get_qualifiers() |= type2->get_qualifiers();
290 } // if
291 }
292
293 void CommonType::visit( FunctionType * ) {}
294 void CommonType::visit( StructInstType * ) {}
295 void CommonType::visit( UnionInstType * ) {}
296
297 void CommonType::visit( EnumInstType *enumInstType ) {
298 if ( dynamic_cast< BasicType * >( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
299 // reuse BasicType, EnumInstType code by swapping type2 with enumInstType
300 ValueGuard< Type * > temp( type2 );
301 type2 = enumInstType;
302 temp.old->accept( *this );
303 } // if
304 }
305
306 void CommonType::visit( TraitInstType * ) {
307 }
308
309 void CommonType::visit( TypeInstType *inst ) {
310 if ( widenFirst ) {
311 NamedTypeDecl *nt = indexer.lookupType( inst->get_name() );
312 if ( nt ) {
313 TypeDecl *type = strict_dynamic_cast< TypeDecl* >( nt );
314 if ( type->get_base() ) {
315 Type::Qualifiers tq1 = inst->get_qualifiers(), tq2 = type2->get_qualifiers();
316 AssertionSet have, need;
317 OpenVarSet newOpen( openVars );
318 type2->get_qualifiers() = Type::Qualifiers();
319 type->get_base()->get_qualifiers() = tq1;
320 if ( unifyExact( type->get_base(), type2, env, have, need, newOpen, indexer ) ) {
321 result = type2->clone();
322 result->get_qualifiers() = tq1 | tq2;
323 } // if
324 type2->get_qualifiers() = tq2;
325 type->get_base()->get_qualifiers() = Type::Qualifiers();
326 } // if
327 } // if
328 } // if
329 }
330
331 void CommonType::visit( TupleType * ) {}
332 void CommonType::visit( VarArgsType * ) {}
333
334 void CommonType::visit( ZeroType *zeroType ) {
335 if ( widenFirst ) {
336 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< PointerType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
337 if ( widenSecond || zeroType->get_qualifiers() <= type2->get_qualifiers() ) {
338 result = type2->clone();
339 result->get_qualifiers() |= zeroType->get_qualifiers();
340 }
341 } else if ( widenSecond && dynamic_cast< OneType* >( type2 ) ) {
342 result = new BasicType( zeroType->get_qualifiers(), BasicType::SignedInt );
343 result->get_qualifiers() |= type2->get_qualifiers();
344 }
345 }
346 }
347
348 void CommonType::visit( OneType *oneType ) {
349 if ( widenFirst ) {
350 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
351 if ( widenSecond || oneType->get_qualifiers() <= type2->get_qualifiers() ) {
352 result = type2->clone();
353 result->get_qualifiers() |= oneType->get_qualifiers();
354 }
355 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
356 result = new BasicType( oneType->get_qualifiers(), BasicType::SignedInt );
357 result->get_qualifiers() |= type2->get_qualifiers();
358 }
359 }
360 }
361} // namespace ResolvExpr
362
363// Local Variables: //
364// tab-width: 4 //
365// mode: c++ //
366// compile-command: "make install" //
367// End: //
Note: See TracBrowser for help on using the repository browser.