source: src/ResolvExpr/CommonType.cc@ 490ff5c3

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 490ff5c3 was 53452de, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Convert CommonType to PassVisitor
  • 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 "Common/PassVisitor.h"
21#include "ResolvExpr/TypeEnvironment.h" // for OpenVarSet, AssertionSet
22#include "SymTab/Indexer.h" // for Indexer
23#include "SynTree/Declaration.h" // for TypeDecl, NamedTypeDecl (ptr...
24#include "SynTree/Type.h" // for BasicType, BasicType::Kind::...
25#include "SynTree/Visitor.h" // for Visitor
26#include "Unify.h" // for unifyExact, bindVar, WidenMode
27#include "typeops.h" // for isFtype
28
29// #define DEBUG
30
31namespace ResolvExpr {
32 struct CommonType : public WithShortCircuiting {
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
36 void previsit( BaseSyntaxNode * ) { visit_children = false; }
37
38 void postvisit( VoidType * voidType );
39 void postvisit( BasicType * basicType );
40 void postvisit( PointerType * pointerType );
41 void postvisit( ArrayType * arrayType );
42 void postvisit( ReferenceType * refType );
43 void postvisit( FunctionType * functionType );
44 void postvisit( StructInstType * aggregateUseType );
45 void postvisit( UnionInstType * aggregateUseType );
46 void postvisit( EnumInstType * aggregateUseType );
47 void postvisit( TraitInstType * aggregateUseType );
48 void postvisit( TypeInstType * aggregateUseType );
49 void postvisit( TupleType * tupleType );
50 void postvisit( VarArgsType * varArgsType );
51 void postvisit( ZeroType * zeroType );
52 void postvisit( OneType * oneType );
53
54 private:
55 template< typename Pointer > void getCommonWithVoidPointer( Pointer* voidPointer, Pointer* otherPointer );
56 template< typename RefType > void handleRefType( RefType *inst, Type *other );
57
58 Type *result;
59 Type *type2; // inherited
60 bool widenFirst, widenSecond;
61 const SymTab::Indexer &indexer;
62 TypeEnvironment &env;
63 const OpenVarSet &openVars;
64 };
65
66 Type * handleReference( Type * t1, Type * t2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment & env, const OpenVarSet &openVars ) {
67 Type * common = nullptr;
68 AssertionSet have, need;
69 OpenVarSet newOpen( openVars );
70 // need unify to bind type variables
71 if ( unify( t1, t2, env, have, need, newOpen, indexer, common ) ) {
72 // std::cerr << "unify success: " << widenFirst << " " << widenSecond << std::endl;
73 if ( (widenFirst || t2->get_qualifiers() <= t1->get_qualifiers()) && (widenSecond || t1->get_qualifiers() <= t2->get_qualifiers()) ) {
74 // std::cerr << "widen okay" << std::endl;
75 common->get_qualifiers() |= t1->get_qualifiers();
76 common->get_qualifiers() |= t2->get_qualifiers();
77 return common;
78 }
79 }
80 // std::cerr << "exact unify failed: " << t1 << " " << t2 << std::endl;
81 return nullptr;
82 }
83
84 Type *commonType( Type *type1, Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars ) {
85 PassVisitor<CommonType> visitor( type2, widenFirst, widenSecond, indexer, env, openVars );
86
87 int depth1 = type1->referenceDepth();
88 int depth2 = type2->referenceDepth();
89 if ( depth1 > 0 || depth2 > 0 ) {
90 int diff = depth1-depth2;
91 // 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.
92 if ( diff > 1 || diff < -1 ) return nullptr;
93
94 // special case where one type has a reference depth of 1 larger than the other
95 if ( diff > 0 || diff < 0 ) {
96 // std::cerr << "reference depth diff: " << diff << std::endl;
97 Type * result = nullptr;
98 ReferenceType * ref1 = dynamic_cast< ReferenceType * >( type1 );
99 ReferenceType * ref2 = dynamic_cast< ReferenceType * >( type2 );
100 if ( diff > 0 ) {
101 // deeper on the left
102 assert( ref1 );
103 result = handleReference( ref1->base, type2, widenFirst, widenSecond, indexer, env, openVars );
104 } else {
105 // deeper on the right
106 assert( ref2 );
107 result = handleReference( type1, ref2->base, widenFirst, widenSecond, indexer, env, openVars );
108 }
109 if ( result && ref1 ) {
110 // formal is reference, so result should be reference
111 // std::cerr << "formal is reference; result should be reference" << std::endl;
112 result = new ReferenceType( ref1->get_qualifiers(), result );
113 }
114 // std::cerr << "common type of reference [" << type1 << "] and [" << type2 << "] is [" << result << "]" << std::endl;
115 return result;
116 }
117 // otherwise, both are reference types of the same depth and this is handled by the CommonType visitor.
118 }
119
120 type1->accept( visitor );
121 Type *result = visitor.pass.get_result();
122 if ( ! result ) {
123 // this appears to be handling for opaque type declarations
124 if ( widenSecond ) {
125 if ( TypeInstType *inst = dynamic_cast< TypeInstType* >( type2 ) ) {
126 if ( NamedTypeDecl *nt = indexer.lookupType( inst->get_name() ) ) {
127 TypeDecl *type = strict_dynamic_cast< TypeDecl* >( nt );
128 if ( type->get_base() ) {
129 Type::Qualifiers tq1 = type1->get_qualifiers(), tq2 = type2->get_qualifiers();
130 AssertionSet have, need;
131 OpenVarSet newOpen( openVars );
132 type1->get_qualifiers() = Type::Qualifiers();
133 type->get_base()->get_qualifiers() = tq1;
134 if ( unifyExact( type1, type->get_base(), env, have, need, newOpen, indexer ) ) {
135 result = type1->clone();
136 result->get_qualifiers() = tq1 | tq2;
137 } // if
138 type1->get_qualifiers() = tq1;
139 type->get_base()->get_qualifiers() = Type::Qualifiers();
140 } // if
141 } // if
142 } // if
143 } // if
144 } // if
145#ifdef DEBUG
146 std::cerr << "============= commonType" << std::endl << "type1 is ";
147 type1->print( std::cerr );
148 std::cerr << " type2 is ";
149 type2->print( std::cerr );
150 if ( result ) {
151 std::cerr << " common type is ";
152 result->print( std::cerr );
153 } else {
154 std::cerr << " no common type";
155 } // if
156 std::cerr << std::endl;
157#endif
158 return result;
159 }
160
161 static const BasicType::Kind combinedType[ BasicType::NUMBER_OF_BASIC_TYPES ][ BasicType::NUMBER_OF_BASIC_TYPES ] =
162 {
163/* Bool Char SignedChar UnsignedChar ShortSignedInt ShortUnsignedInt SignedInt UnsignedInt LongSignedInt LongUnsignedInt LongLongSignedInt LongLongUnsignedInt Float Double LongDouble FloatComplex DoubleComplex LongDoubleComplex FloatImaginary DoubleImaginary LongDoubleImaginary SignedInt128 UnsignedInt128 */
164 /* 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, },
165 /* 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, },
166 /* 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, },
167 /* 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, },
168 /* 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, },
169 /* 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, },
170 /* 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, },
171 /* 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, },
172 /* 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, },
173 /* 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, },
174 /* 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, },
175 /* 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, },
176 /* 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, },
177 /* 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, },
178 /* 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, },
179 /* 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, },
180 /* 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, },
181 /* 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, },
182 /* 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, },
183 /* 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, },
184 /* 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 },
185 /* 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, },
186 /* 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, },
187 };
188
189 CommonType::CommonType( Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars )
190 : result( 0 ), type2( type2 ), widenFirst( widenFirst ), widenSecond( widenSecond ), indexer( indexer ), env( env ), openVars( openVars ) {
191 }
192
193 void CommonType::postvisit( VoidType * ) {}
194
195 void CommonType::postvisit( BasicType *basicType ) {
196 if ( BasicType *otherBasic = dynamic_cast< BasicType* >( type2 ) ) {
197 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ otherBasic->get_kind() ];
198 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= otherBasic->get_qualifiers() ) || widenFirst ) && ( ( newType == otherBasic->get_kind() && basicType->get_qualifiers() <= otherBasic->get_qualifiers() ) || widenSecond ) ) {
199 result = new BasicType( basicType->get_qualifiers() | otherBasic->get_qualifiers(), newType );
200 } // if
201 } else if ( dynamic_cast< EnumInstType * > ( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
202 // use signed int in lieu of the enum/zero/one type
203 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ BasicType::SignedInt ];
204 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= type2->get_qualifiers() ) || widenFirst ) && ( ( newType != basicType->get_kind() && basicType->get_qualifiers() <= type2->get_qualifiers() ) || widenSecond ) ) {
205 result = new BasicType( basicType->get_qualifiers() | type2->get_qualifiers(), newType );
206 } // if
207 } // if
208 }
209
210 template< typename Pointer >
211 void CommonType::getCommonWithVoidPointer( Pointer* voidPointer, Pointer* otherPointer ) {
212 if ( TypeInstType* var = dynamic_cast< TypeInstType* >( otherPointer->get_base() ) ) {
213 OpenVarSet::const_iterator entry = openVars.find( var->get_name() );
214 if ( entry != openVars.end() ) {
215 AssertionSet need, have;
216 WidenMode widen( widenFirst, widenSecond );
217 if ( entry != openVars.end() && ! bindVar(var, voidPointer->get_base(), entry->second, env, need, have, openVars, widen, indexer ) ) return;
218 }
219 }
220 result = voidPointer->clone();
221 result->get_qualifiers() |= otherPointer->get_qualifiers();
222 }
223
224 void CommonType::postvisit( PointerType *pointerType ) {
225 if ( PointerType *otherPointer = dynamic_cast< PointerType* >( type2 ) ) {
226 // std::cerr << "commonType: two pointers: " << pointerType << " / " << otherPointer << std::endl;
227 if ( widenFirst && dynamic_cast< VoidType* >( otherPointer->get_base() ) && ! isFtype(pointerType->get_base()) ) {
228 getCommonWithVoidPointer( otherPointer, pointerType );
229 } else if ( widenSecond && dynamic_cast< VoidType* >( pointerType->get_base() ) && ! isFtype(otherPointer->get_base()) ) {
230 getCommonWithVoidPointer( pointerType, otherPointer );
231 } else if ( ( pointerType->get_base()->get_qualifiers() >= otherPointer->get_base()->get_qualifiers() || widenFirst )
232 && ( pointerType->get_base()->get_qualifiers() <= otherPointer->get_base()->get_qualifiers() || widenSecond ) ) {
233 // std::cerr << "middle case" << std::endl;
234 Type::Qualifiers tq1 = pointerType->get_base()->get_qualifiers(), tq2 = otherPointer->get_base()->get_qualifiers();
235 pointerType->get_base()->get_qualifiers() = Type::Qualifiers();
236 otherPointer->get_base()->get_qualifiers() = Type::Qualifiers();
237 AssertionSet have, need;
238 OpenVarSet newOpen( openVars );
239 if ( unifyExact( pointerType->get_base(), otherPointer->get_base(), env, have, need, newOpen, indexer ) ) {
240 // std::cerr << "unifyExact success" << std::endl;
241 if ( tq1 < tq2 ) {
242 result = pointerType->clone();
243 } else {
244 result = otherPointer->clone();
245 } // if
246 result->get_qualifiers() = tq1 | tq2;
247 } else {
248 /// std::cerr << "place for ptr-to-type" << std::endl;
249 } // if
250 pointerType->get_base()->get_qualifiers() = tq1;
251 otherPointer->get_base()->get_qualifiers() = tq2;
252 } // if
253 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
254 result = pointerType->clone();
255 result->get_qualifiers() |= type2->get_qualifiers();
256 } // if
257 }
258
259 void CommonType::postvisit( ArrayType * ) {}
260
261 void CommonType::postvisit( ReferenceType *refType ) {
262 if ( ReferenceType *otherRef = dynamic_cast< ReferenceType* >( type2 ) ) {
263 // std::cerr << "commonType: both references: " << refType << " / " << otherRef << std::endl;
264 // 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;
265 if ( widenFirst && dynamic_cast< VoidType* >( otherRef->get_base() ) && ! isFtype(refType->get_base()) ) {
266 getCommonWithVoidPointer( otherRef, refType );
267 } else if ( widenSecond && dynamic_cast< VoidType* >( refType->get_base() ) && ! isFtype(otherRef->get_base()) ) {
268 getCommonWithVoidPointer( refType, otherRef );
269 } else if ( ( refType->get_base()->get_qualifiers() >= otherRef->get_base()->get_qualifiers() || widenFirst )
270 && ( refType->get_base()->get_qualifiers() <= otherRef->get_base()->get_qualifiers() || widenSecond ) ) {
271 // std::cerr << "middle case" << std::endl;
272 Type::Qualifiers tq1 = refType->get_base()->get_qualifiers(), tq2 = otherRef->get_base()->get_qualifiers();
273 refType->get_base()->get_qualifiers() = Type::Qualifiers();
274 otherRef->get_base()->get_qualifiers() = Type::Qualifiers();
275 AssertionSet have, need;
276 OpenVarSet newOpen( openVars );
277 if ( unifyExact( refType->get_base(), otherRef->get_base(), env, have, need, newOpen, indexer ) ) {
278 if ( tq1 < tq2 ) {
279 result = refType->clone();
280 } else {
281 result = otherRef->clone();
282 } // if
283 result->get_qualifiers() = tq1 | tq2;
284 } else {
285 /// std::cerr << "place for ptr-to-type" << std::endl;
286 } // if
287 refType->get_base()->get_qualifiers() = tq1;
288 otherRef->get_base()->get_qualifiers() = tq2;
289 } // if
290 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
291 result = refType->clone();
292 result->get_qualifiers() |= type2->get_qualifiers();
293 } // if
294 }
295
296 void CommonType::postvisit( FunctionType * ) {}
297 void CommonType::postvisit( StructInstType * ) {}
298 void CommonType::postvisit( UnionInstType * ) {}
299
300 void CommonType::postvisit( EnumInstType *enumInstType ) {
301 if ( dynamic_cast< BasicType * >( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
302 // reuse BasicType, EnumInstType code by swapping type2 with enumInstType
303 result = commonType( type2, enumInstType, widenSecond, widenFirst, indexer, env, openVars );
304 } // if
305 }
306
307 void CommonType::postvisit( TraitInstType * ) {
308 }
309
310 void CommonType::postvisit( TypeInstType *inst ) {
311 if ( widenFirst ) {
312 NamedTypeDecl *nt = indexer.lookupType( inst->get_name() );
313 if ( nt ) {
314 TypeDecl *type = strict_dynamic_cast< TypeDecl* >( nt );
315 if ( type->get_base() ) {
316 Type::Qualifiers tq1 = inst->get_qualifiers(), tq2 = type2->get_qualifiers();
317 AssertionSet have, need;
318 OpenVarSet newOpen( openVars );
319 type2->get_qualifiers() = Type::Qualifiers();
320 type->get_base()->get_qualifiers() = tq1;
321 if ( unifyExact( type->get_base(), type2, env, have, need, newOpen, indexer ) ) {
322 result = type2->clone();
323 result->get_qualifiers() = tq1 | tq2;
324 } // if
325 type2->get_qualifiers() = tq2;
326 type->get_base()->get_qualifiers() = Type::Qualifiers();
327 } // if
328 } // if
329 } // if
330 }
331
332 void CommonType::postvisit( TupleType * ) {}
333 void CommonType::postvisit( VarArgsType * ) {}
334
335 void CommonType::postvisit( ZeroType *zeroType ) {
336 if ( widenFirst ) {
337 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< PointerType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
338 if ( widenSecond || zeroType->get_qualifiers() <= type2->get_qualifiers() ) {
339 result = type2->clone();
340 result->get_qualifiers() |= zeroType->get_qualifiers();
341 }
342 } else if ( widenSecond && dynamic_cast< OneType* >( type2 ) ) {
343 result = new BasicType( zeroType->get_qualifiers(), BasicType::SignedInt );
344 result->get_qualifiers() |= type2->get_qualifiers();
345 }
346 }
347 }
348
349 void CommonType::postvisit( OneType *oneType ) {
350 if ( widenFirst ) {
351 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
352 if ( widenSecond || oneType->get_qualifiers() <= type2->get_qualifiers() ) {
353 result = type2->clone();
354 result->get_qualifiers() |= oneType->get_qualifiers();
355 }
356 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
357 result = new BasicType( oneType->get_qualifiers(), BasicType::SignedInt );
358 result->get_qualifiers() |= type2->get_qualifiers();
359 }
360 }
361 }
362} // namespace ResolvExpr
363
364// Local Variables: //
365// tab-width: 4 //
366// mode: c++ //
367// compile-command: "make install" //
368// End: //
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