source: src/SymTab/TypeEquality.cc@ b6fd751

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 b6fd751 was 89e6ffc, checked in by Aaron Moss <a3moss@…>, 9 years ago

Added support for ZeroType and OneType to all relevant visitors
  • Property mode set to 100644
File size: 6.4 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// TypeEquality.cc --
8//
9// Author : Rob Schluntz
10// Created On : Tue Jul 07 16:28:29 2015
11// Last Modified By : Rob Schluntz
12// Last Modified On : Mon Jul 20 14:16:11 2015
13// Update Count : 37
14//
15
16#include <list>
17#include <iterator>
18#include "Validate.h"
19#include "SynTree/Visitor.h"
20#include "SynTree/Type.h"
21#include "SynTree/Statement.h"
22#include "SynTree/TypeSubstitution.h"
23#include "Indexer.h"
24#include "TypeEquality.h"
25
26namespace SymTab {
27 class TypeEquality : public Visitor {
28 public:
29 TypeEquality( Type * other, bool vlaErr ) : result( true ), other( other ),
30 vlaErr( vlaErr ) {}
31 bool result;
32
33 private:
34 virtual void visit( FunctionType *funcType );
35 virtual void visit( VoidType *voidType );
36 virtual void visit( BasicType *basicType );
37 virtual void visit( PointerType *pointerType );
38 virtual void visit( ArrayType *arrayType );
39 virtual void visit( StructInstType *structInst );
40 virtual void visit( UnionInstType *unionInst );
41 virtual void visit( EnumInstType *enumInst );
42 virtual void visit( TypeInstType *typeInst );
43 virtual void visit( VarArgsType *varArgsType );
44 virtual void visit( ZeroType *zeroType );
45 virtual void visit( OneType *oneType );
46
47 void handleQualifiers( Type * t );
48
49 Type * other;
50 bool vlaErr;
51 };
52
53 bool typeEquals( Type * t1, Type * t2, bool vlaErr ) {
54 TypeEquality teq( t2, vlaErr );
55 t1->accept( teq );
56 return teq.result;
57 }
58
59 void TypeEquality::handleQualifiers( Type * t ) {
60 result = result && t->get_qualifiers() == other->get_qualifiers();
61 }
62
63 void TypeEquality::visit( VoidType *voidType ) {
64 handleQualifiers( voidType );
65 if ( ! dynamic_cast< VoidType * >( other ) ) {
66 result = false;
67 }
68 }
69
70 void TypeEquality::visit( BasicType *basicType ) {
71 handleQualifiers( basicType );
72 if ( BasicType * bt = dynamic_cast< BasicType * >( other ) ) {
73 result = result && basicType->get_kind() == bt->get_kind();
74 } else {
75 result = false;
76 }
77 }
78
79 void TypeEquality::visit( PointerType *pointerType ) {
80 handleQualifiers( pointerType );
81 if ( PointerType * pt = dynamic_cast< PointerType * >( other ) ) {
82 other = pt->get_base();
83 pointerType->get_base()->accept( *this );
84 } else {
85 result = false;
86 }
87 }
88
89 void TypeEquality::visit( ArrayType *arrayType ) {
90 handleQualifiers( arrayType );
91
92 if ( ArrayType * at = dynamic_cast< ArrayType * >( other ) ) {
93 // to be equal, array types must both be VLA or both not VLA
94 // and must both have a dimension expression or not have a dimension
95 result = result && arrayType->get_isVarLen() == at->get_isVarLen()
96 && ((arrayType->get_dimension() != 0 && at->get_dimension() != 0)
97 || (arrayType->get_dimension() == 0 && at->get_dimension() == 0));
98
99 if ( vlaErr ) {
100 // useful for comparing typedef types - in this case, we
101 // want types to appear distinct if either is a VLA type
102 if ( arrayType->get_isVarLen() || at->get_isVarLen() ) {
103 result = false;
104 }
105 }
106
107 if ( ! arrayType->get_isVarLen() && ! at->get_isVarLen() &&
108 arrayType->get_dimension() != 0 && at->get_dimension() != 0 ) {
109 ConstantExpr * ce1 = dynamic_cast< ConstantExpr * >( arrayType->get_dimension() );
110 ConstantExpr * ce2 = dynamic_cast< ConstantExpr * >( at->get_dimension() );
111 assert(ce1 && ce2);
112
113 Constant * c1 = ce1->get_constant();
114 Constant * c2 = ce2->get_constant();
115
116 result = result && c1->get_value() == c2->get_value();
117 }
118
119 other = at->get_base();
120 arrayType->get_base()->accept( *this );
121 } else {
122 result = false;
123 }
124 }
125
126 void TypeEquality::visit( FunctionType *funcType ) {
127 handleQualifiers( funcType );
128
129 if ( FunctionType * ft = dynamic_cast< FunctionType * >( other ) ) {
130 // function types must have the same number of return types
131 // and parameters to be equivalent
132 result = result && funcType->get_returnVals().size() == ft->get_returnVals().size()
133 && funcType->get_parameters().size() == ft->get_parameters().size()
134 && funcType->get_isVarArgs() == ft->get_isVarArgs();
135
136 std::list< DeclarationWithType * >::iterator it1, it2;
137
138 // return types must be equivalent
139 it1 = funcType->get_returnVals().begin();
140 it2 = ft->get_returnVals().begin();
141 for ( ; it1 != funcType->get_returnVals().end(); ++it1, ++it2 ) {
142 if ( ! result ) return;
143 other = (*it2)->get_type();
144 (*it1)->get_type()->accept( *this );
145 }
146
147 // parameter types must be equivalent
148 it1 = funcType->get_parameters().begin();
149 it2 = ft->get_parameters().begin();
150 for ( ; it1 != funcType->get_parameters().end(); ++it1, ++it2 ) {
151 if ( ! result ) return;
152 other = (*it2)->get_type();
153 (*it1)->get_type()->accept( *this );
154 }
155 } else {
156 result = false;
157 }
158 }
159
160 // aggregate types only need to have the same name
161 void TypeEquality::visit( StructInstType *structInst ) {
162 handleQualifiers( structInst );
163 if ( StructInstType * st = dynamic_cast< StructInstType * >( other ) ) {
164 result = result && structInst->get_name() == st->get_name();
165 } else {
166 result = false;
167 }
168 }
169
170 void TypeEquality::visit( UnionInstType *unionInst ) {
171 handleQualifiers( unionInst );
172 if ( UnionInstType * ut = dynamic_cast< UnionInstType * >( other ) ) {
173 result = result && unionInst->get_name() == ut->get_name();
174 } else {
175 result = false;
176 }
177 }
178
179 void TypeEquality::visit( EnumInstType *enumInst ) {
180 handleQualifiers( enumInst );
181 if ( EnumInstType * et = dynamic_cast< EnumInstType * >( other ) ) {
182 result = result && enumInst->get_name() == et->get_name();
183 } else {
184 result = false;
185 }
186 }
187
188 void TypeEquality::visit( TypeInstType *typeInst ) {
189 handleQualifiers( typeInst );
190 if ( TypeInstType * tt = dynamic_cast< TypeInstType * >( other ) ) {
191 result = result && typeInst->get_name() == tt->get_name();
192 } else {
193 result = false;
194 }
195 }
196
197 void TypeEquality::visit( VarArgsType *varArgsType ) {
198 handleQualifiers( varArgsType );
199 if ( ! dynamic_cast< VarArgsType * >( other ) ) {
200 result = false;
201 }
202 }
203
204 void TypeEquality::visit( ZeroType *zeroType ) {
205 handleQualifiers( zeroType );
206 if ( ! dynamic_cast< ZeroType * >( other ) ) {
207 result = false;
208 }
209 }
210
211 void TypeEquality::visit( OneType *oneType ) {
212 handleQualifiers( oneType );
213 if ( ! dynamic_cast< OneType * >( other ) ) {
214 result = false;
215 }
216 }
217} // namespace SymTab
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