source: src/ResolvExpr/ConversionCost.cc@ 70f89d00

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors ctor deferred_resn demangler enum forall-pointer-decay gc_noraii jacob/cs343-translation jenkins-sandbox memory 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 70f89d00 was 4040425, checked in by Peter A. Buhr <pabuhr@…>, 10 years ago

change keyword type to otype and context to trait
  • Property mode set to 100644
File size: 9.5 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// ConversionCost.cc --
8//
9// Author : Richard C. Bilson
10// Created On : Sun May 17 07:06:19 2015
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Wed Mar 2 17:35:46 2016
13// Update Count : 6
14//
15
16#include "ConversionCost.h"
17#include "typeops.h"
18#include "SynTree/Type.h"
19#include "SynTree/Visitor.h"
20#include "SymTab/Indexer.h"
21
22namespace ResolvExpr {
23 const Cost Cost::zero = Cost( 0, 0, 0 );
24 const Cost Cost::infinity = Cost( -1, -1, -1 );
25
26 Cost conversionCost( Type *src, Type *dest, const SymTab::Indexer &indexer, const TypeEnvironment &env ) {
27 if ( TypeInstType *destAsTypeInst = dynamic_cast< TypeInstType* >( dest ) ) {
28 EqvClass eqvClass;
29 NamedTypeDecl *namedType;
30/// std::cout << "type inst " << destAsTypeInst->get_name();
31 if ( env.lookup( destAsTypeInst->get_name(), eqvClass ) ) {
32 return conversionCost( src, eqvClass.type, indexer, env );
33 } else if ( ( namedType = indexer.lookupType( destAsTypeInst->get_name() ) ) ) {
34/// std::cout << " found" << std::endl;
35 TypeDecl *type = dynamic_cast< TypeDecl* >( namedType );
36 // all typedefs should be gone by this point
37 assert( type );
38 if ( type->get_base() ) {
39 return conversionCost( src, type->get_base(), indexer, env ) + Cost( 0, 0, 1 );
40 } // if
41 } // if
42/// std::cout << " not found" << std::endl;
43 } // if
44/// std::cout << "src is ";
45/// src->print( std::cout );
46/// std::cout << std::endl << "dest is ";
47/// dest->print( std::cout );
48/// std::cout << std::endl << "env is" << std::endl;
49/// env.print( std::cout, 8 );
50 if ( typesCompatibleIgnoreQualifiers( src, dest, indexer, env ) ) {
51/// std::cout << "compatible!" << std::endl;
52 return Cost( 0, 0, 0 );
53 } else if ( dynamic_cast< VoidType* >( dest ) ) {
54 return Cost( 0, 0, 1 );
55 } else {
56 ConversionCost converter( dest, indexer, env );
57 src->accept( converter );
58 if ( converter.get_cost() == Cost::infinity ) {
59 return Cost::infinity;
60 } else {
61 return converter.get_cost() + Cost( 0, 0, 0 );
62 } // if
63 } // if
64 }
65
66 ConversionCost::ConversionCost( Type *dest, const SymTab::Indexer &indexer, const TypeEnvironment &env )
67 : dest( dest ), indexer( indexer ), cost( Cost::infinity ), env( env ) {
68 }
69
70/*
71 Old
72 ===
73 Double
74 |
75 Float
76 |
77 ULong
78 / \
79 UInt Long
80 \ /
81 Int
82 |
83 Ushort
84 |
85 Short
86 |
87 Uchar
88 / \
89 Schar Char
90
91 New
92 ===
93 +-----LongDoubleComplex--+
94 LongDouble--+ | +-LongDoubleImag
95 | +---DoubleComplex---+ |
96 Double------+ | +----DoubleImag
97 | +-FloatComplex-+ |
98 Float---------+ +-------FloatImag
99 |
100 ULongLong
101 |
102 LongLong
103 |
104 ULong
105 / \
106 UInt Long
107 \ /
108 Int
109 |
110 Ushort
111 |
112 Short
113 |
114 Uchar
115 / \
116 Schar Char
117 \ /
118 Bool
119*/
120
121 static const int costMatrix[ BasicType::NUMBER_OF_BASIC_TYPES ][ BasicType::NUMBER_OF_BASIC_TYPES ] =
122 {
123 /* Src \ Dest: Bool Char SChar UChar Short UShort Int UInt Long ULong LLong ULLong Float Double LDbl FCplex DCplex LDCplex FImag DImag LDImag */
124 /* Bool */ { 0, 1, 1, 2, 3, 4, 5, 6, 6, 7, 8, 9, 10, 11, 12, 11, 12, 13, -1, -1, -1 },
125 /* Char */ { -1, 0, -1, 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 10, 11, 10, 11, 12, -1, -1, -1 },
126 /* SChar */ { -1, -1, 0, 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 10, 11, 10, 11, 12, -1, -1, -1 },
127 /* UChar */ { -1, -1, -1, 0, 1, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10, 9, 10, 11, -1, -1, -1 },
128 /* Short */ { -1, -1, -1, -1, 0, 1, 2, 3, 3, 4, 5, 6, 7, 8, 9, 8, 9, 10, -1, -1, -1 },
129 /* UShort */{ -1, -1, -1, -1, -1, 0, 1, 2, 2, 3, 4, 5, 6, 7, 8, 7, 8, 9, -1, -1, -1 },
130 /* Int */ { -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 3, 4, 5, 6, 7, 6, 7, 8, -1, -1, -1 },
131 /* UInt */ { -1, -1, -1, -1, -1, -1, -1, 0, -1, 1, 2, 3, 4, 5, 6, 5, 6, 7, -1, -1, -1 },
132 /* Long */ { -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 5, 6, 7, -1, -1, -1 },
133 /* ULong */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 4, 5, 6, -1, -1, -1 },
134 /* LLong */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 3, 4, 5, -1, -1, -1 },
135 /* ULLong */{ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 2, 3, 4, -1, -1, -1 },
136 /* Float */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 1, 2, 3, -1, -1, -1 },
137 /* Double */{ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, -1, 1, 2, -1, -1, -1 },
138 /* LDbl */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, -1, 1, -1, -1, -1 },
139 /* FCplex */{ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, -1, -1, -1 },
140 /* DCplex */{ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, -1, -1, -1 },
141 /* LDCplex */{ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, -1, -1 },
142 /* FImag */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 3, 0, 1, 2 },
143 /* DImag */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, -1, 0, 1 },
144 /* LDImag */{ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, -1, -1, 0 }
145 };
146
147 void ConversionCost::visit(VoidType *voidType) {
148 cost = Cost::infinity;
149 }
150
151 void ConversionCost::visit(BasicType *basicType) {
152 if ( BasicType *destAsBasic = dynamic_cast< BasicType* >( dest ) ) {
153 int tableResult = costMatrix[ basicType->get_kind() ][ destAsBasic->get_kind() ];
154 if ( tableResult == -1 ) {
155 cost = Cost( 1, 0, 0 );
156 } else {
157 cost = Cost( 0, 0, tableResult );
158 } // if
159 } // if
160 }
161
162 void ConversionCost::visit(PointerType *pointerType) {
163 if ( PointerType *destAsPtr = dynamic_cast< PointerType* >( dest ) ) {
164 if ( pointerType->get_base()->get_qualifiers() <= destAsPtr->get_base()->get_qualifiers() && typesCompatibleIgnoreQualifiers( pointerType->get_base(), destAsPtr->get_base(), indexer, env ) ) {
165 cost = Cost( 0, 0, 1 );
166 } else {
167 int assignResult = ptrsAssignable( pointerType->get_base(), destAsPtr->get_base(), env );
168 if ( assignResult < 0 ) {
169 cost = Cost( 0, 0, 1 );
170 } else if ( assignResult > 0 ) {
171 cost = Cost( 1, 0, 0 );
172 } // if
173 } // if
174 } // if
175 }
176
177 void ConversionCost::visit(ArrayType *arrayType) {
178 }
179
180 void ConversionCost::visit(FunctionType *functionType) {
181 }
182
183 void ConversionCost::visit(StructInstType *inst) {
184 if ( StructInstType *destAsInst = dynamic_cast< StructInstType* >( dest ) ) {
185 if ( inst->get_name() == destAsInst->get_name() ) {
186 cost = Cost::zero;
187 } // if
188 } // if
189 }
190
191 void ConversionCost::visit(UnionInstType *inst) {
192 if ( StructInstType *destAsInst = dynamic_cast< StructInstType* >( dest ) ) {
193 if ( inst->get_name() == destAsInst->get_name() ) {
194 cost = Cost::zero;
195 } // if
196 } // if
197 }
198
199 void ConversionCost::visit(EnumInstType *inst) {
200 static Type::Qualifiers q;
201 static BasicType integer( q, BasicType::SignedInt );
202 integer.accept( *this );
203 if ( cost < Cost( 1, 0, 0 ) ) {
204 cost.incSafe();
205 } // if
206 }
207
208 void ConversionCost::visit(TraitInstType *inst) {
209 }
210
211 void ConversionCost::visit(TypeInstType *inst) {
212 EqvClass eqvClass;
213 NamedTypeDecl *namedType;
214 if ( env.lookup( inst->get_name(), eqvClass ) ) {
215 cost = conversionCost( eqvClass.type, dest, indexer, env );
216 } else if ( TypeInstType *destAsInst = dynamic_cast< TypeInstType* >( dest ) ) {
217 if ( inst->get_name() == destAsInst->get_name() ) {
218 cost = Cost::zero;
219 }
220 } else if ( ( namedType = indexer.lookupType( inst->get_name() ) ) ) {
221 TypeDecl *type = dynamic_cast< TypeDecl* >( namedType );
222 // all typedefs should be gone by this point
223 assert( type );
224 if ( type->get_base() ) {
225 cost = conversionCost( type->get_base(), dest, indexer, env ) + Cost( 0, 0, 1 );
226 } // if
227 } // if
228 }
229
230 void ConversionCost::visit(TupleType *tupleType) {
231 Cost c;
232 if ( TupleType *destAsTuple = dynamic_cast< TupleType* >( dest ) ) {
233 std::list< Type* >::const_iterator srcIt = tupleType->get_types().begin();
234 std::list< Type* >::const_iterator destIt = destAsTuple->get_types().begin();
235 while ( srcIt != tupleType->get_types().end() ) {
236 Cost newCost = conversionCost( *srcIt++, *destIt++, indexer, env );
237 if ( newCost == Cost::infinity ) {
238 return;
239 } // if
240 c += newCost;
241 } // while
242 if ( destIt != destAsTuple->get_types().end() ) {
243 cost = Cost::infinity;
244 } else {
245 cost = c;
246 } // if
247 } // if
248 }
249
250 void ConversionCost::visit(VarArgsType *varArgsType) {
251 if ( dynamic_cast< VarArgsType* >( dest ) ) {
252 cost = Cost::zero;
253 }
254 }
255} // namespace ResolvExpr
256
257// Local Variables: //
258// tab-width: 4 //
259// mode: c++ //
260// compile-command: "make install" //
261// End: //
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