source: src/ResolvExpr/Resolver.cc@ 2bae7307

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 string with_gc
Last change on this file since 2bae7307 was 843054c2, checked in by Peter A. Buhr <pabuhr@…>, 10 years ago

licencing: seventh groups of files
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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// Resolver.cc --
8//
9// Author : Richard C. Bilson
10// Created On : Sun May 17 12:17:01 2015
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Sun May 17 12:18:17 2015
13// Update Count : 2
14//
15
16#include "Resolver.h"
17#include "AlternativeFinder.h"
18#include "Alternative.h"
19#include "RenameVars.h"
20#include "ResolveTypeof.h"
21#include "SynTree/Statement.h"
22#include "SynTree/Type.h"
23#include "SynTree/Expression.h"
24#include "SynTree/Initializer.h"
25#include "SymTab/Indexer.h"
26#include "utility.h"
27
28#include <iostream>
29using namespace std;
30
31namespace ResolvExpr {
32 class Resolver : public SymTab::Indexer {
33 public:
34 Resolver() : SymTab::Indexer( false ), switchType( 0 ) {}
35
36 virtual void visit( FunctionDecl *functionDecl );
37 virtual void visit( ObjectDecl *functionDecl );
38 virtual void visit( TypeDecl *typeDecl );
39
40 virtual void visit( ExprStmt *exprStmt );
41 virtual void visit( IfStmt *ifStmt );
42 virtual void visit( WhileStmt *whileStmt );
43 virtual void visit( ForStmt *forStmt );
44 virtual void visit( SwitchStmt *switchStmt );
45 virtual void visit( ChooseStmt *switchStmt );
46 virtual void visit( CaseStmt *caseStmt );
47 virtual void visit( ReturnStmt *returnStmt );
48
49 virtual void visit( SingleInit *singleInit );
50 virtual void visit( ListInit *listInit );
51 private:
52 std::list< Type * > functionReturn;
53 Type *initContext;
54 Type *switchType;
55 };
56
57 void resolve( std::list< Declaration * > translationUnit ) {
58 Resolver resolver;
59 acceptAll( translationUnit, resolver );
60#if 0
61 resolver.print( cerr );
62 for ( std::list< Declaration * >::iterator i = translationUnit.begin(); i != translationUnit.end(); ++i ) {
63 (*i)->print( std::cerr );
64 (*i)->accept( resolver );
65 } // for
66#endif
67 }
68
69 Expression *resolveInVoidContext( Expression *expr, const SymTab::Indexer &indexer ) {
70 TypeEnvironment env;
71 return resolveInVoidContext( expr, indexer, env );
72 }
73
74 namespace {
75 void finishExpr( Expression *expr, const TypeEnvironment &env ) {
76 expr->set_env( new TypeSubstitution );
77 env.makeSubstitution( *expr->get_env() );
78 }
79
80 Expression *findVoidExpression( Expression *untyped, const SymTab::Indexer &indexer ) {
81 global_renamer.reset();
82 TypeEnvironment env;
83 Expression *newExpr = resolveInVoidContext( untyped, indexer, env );
84 finishExpr( newExpr, env );
85 return newExpr;
86 }
87
88 Expression *findSingleExpression( Expression *untyped, const SymTab::Indexer &indexer ) {
89 TypeEnvironment env;
90 AlternativeFinder finder( indexer, env );
91 finder.find( untyped );
92#if 0
93 if ( finder.get_alternatives().size() != 1 ) {
94 std::cout << "untyped expr is ";
95 untyped->print( std::cout );
96 std::cout << std::endl << "alternatives are:";
97 for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) {
98 i->print( std::cout );
99 } // for
100 } // if
101#endif
102 assert( finder.get_alternatives().size() == 1 );
103 Alternative &choice = finder.get_alternatives().front();
104 Expression *newExpr = choice.expr->clone();
105 finishExpr( newExpr, choice.env );
106 return newExpr;
107 }
108
109 bool isIntegralType( Type *type ) {
110 if ( dynamic_cast< EnumInstType * >( type ) ) {
111 return true;
112 } else if ( BasicType *bt = dynamic_cast< BasicType * >( type ) ) {
113 return bt->isInteger();
114 } else {
115 return false;
116 } // if
117 }
118
119 Expression *findIntegralExpression( Expression *untyped, const SymTab::Indexer &indexer ) {
120 TypeEnvironment env;
121 AlternativeFinder finder( indexer, env );
122 finder.find( untyped );
123#if 0
124 if ( finder.get_alternatives().size() != 1 ) {
125 std::cout << "untyped expr is ";
126 untyped->print( std::cout );
127 std::cout << std::endl << "alternatives are:";
128 for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) {
129 i->print( std::cout );
130 } // for
131 } // if
132#endif
133 Expression *newExpr = 0;
134 const TypeEnvironment *newEnv = 0;
135 for ( AltList::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) {
136 if ( i->expr->get_results().size() == 1 && isIntegralType( i->expr->get_results().front() ) ) {
137 if ( newExpr ) {
138 throw SemanticError( "Too many interpretations for case control expression", untyped );
139 } else {
140 newExpr = i->expr->clone();
141 newEnv = &i->env;
142 } // if
143 } // if
144 } // for
145 if ( ! newExpr ) {
146 throw SemanticError( "No interpretations for case control expression", untyped );
147 } // if
148 finishExpr( newExpr, *newEnv );
149 return newExpr;
150 }
151
152 }
153
154 void Resolver::visit( ObjectDecl *objectDecl ) {
155 Type *new_type = resolveTypeof( objectDecl->get_type(), *this );
156 objectDecl->set_type( new_type );
157 initContext = new_type;
158 SymTab::Indexer::visit( objectDecl );
159 }
160
161 void Resolver::visit( TypeDecl *typeDecl ) {
162 if ( typeDecl->get_base() ) {
163 Type *new_type = resolveTypeof( typeDecl->get_base(), *this );
164 typeDecl->set_base( new_type );
165 } // if
166 SymTab::Indexer::visit( typeDecl );
167 }
168
169 void Resolver::visit( FunctionDecl *functionDecl ) {
170#if 0
171 std::cout << "resolver visiting functiondecl ";
172 functionDecl->print( std::cout );
173 std::cout << std::endl;
174#endif
175 Type *new_type = resolveTypeof( functionDecl->get_type(), *this );
176 functionDecl->set_type( new_type );
177 std::list< Type * > oldFunctionReturn = functionReturn;
178 functionReturn.clear();
179 for ( std::list< DeclarationWithType * >::const_iterator i = functionDecl->get_functionType()->get_returnVals().begin(); i != functionDecl->get_functionType()->get_returnVals().end(); ++i ) {
180 functionReturn.push_back( (*i)->get_type() );
181 } // for
182 SymTab::Indexer::visit( functionDecl );
183 functionReturn = oldFunctionReturn;
184 }
185
186 void Resolver::visit( ExprStmt *exprStmt ) {
187 if ( exprStmt->get_expr() ) {
188 Expression *newExpr = findVoidExpression( exprStmt->get_expr(), *this );
189 delete exprStmt->get_expr();
190 exprStmt->set_expr( newExpr );
191 } // if
192 }
193
194 void Resolver::visit( IfStmt *ifStmt ) {
195 Expression *newExpr = findSingleExpression( ifStmt->get_condition(), *this );
196 delete ifStmt->get_condition();
197 ifStmt->set_condition( newExpr );
198 Visitor::visit( ifStmt );
199 }
200
201 void Resolver::visit( WhileStmt *whileStmt ) {
202 Expression *newExpr = findSingleExpression( whileStmt->get_condition(), *this );
203 delete whileStmt->get_condition();
204 whileStmt->set_condition( newExpr );
205 Visitor::visit( whileStmt );
206 }
207
208 void Resolver::visit( ForStmt *forStmt ) {
209 // SymTab::Indexer::visit( forStmt );
210 Expression *newExpr;
211 // for statements introduce a level of scope
212 enterScope();
213 maybeAccept( forStmt->get_initialization(), *this );
214 if ( forStmt->get_condition() ) {
215 newExpr = findSingleExpression( forStmt->get_condition(), *this );
216 delete forStmt->get_condition();
217 forStmt->set_condition( newExpr );
218 } // if
219
220 if ( forStmt->get_increment() ) {
221 newExpr = findVoidExpression( forStmt->get_increment(), *this );
222 delete forStmt->get_increment();
223 forStmt->set_increment( newExpr );
224 } // if
225
226 maybeAccept( forStmt->get_condition(), *this );
227 maybeAccept( forStmt->get_increment(), *this );
228 maybeAccept( forStmt->get_body(), *this );
229 leaveScope();
230 }
231
232 template< typename SwitchClass >
233 void handleSwitchStmt( SwitchClass *switchStmt, SymTab::Indexer &visitor ) {
234 Expression *newExpr;
235 newExpr = findIntegralExpression( switchStmt->get_condition(), visitor );
236 delete switchStmt->get_condition();
237 switchStmt->set_condition( newExpr );
238
239 visitor.Visitor::visit( switchStmt );
240 }
241
242 void Resolver::visit( SwitchStmt *switchStmt ) {
243 handleSwitchStmt( switchStmt, *this );
244 }
245
246 void Resolver::visit( ChooseStmt *switchStmt ) {
247 handleSwitchStmt( switchStmt, *this );
248 }
249
250 void Resolver::visit( CaseStmt *caseStmt ) {
251 Visitor::visit( caseStmt );
252 }
253
254 void Resolver::visit( ReturnStmt *returnStmt ) {
255 if ( returnStmt->get_expr() ) {
256 CastExpr *castExpr = new CastExpr( returnStmt->get_expr() );
257 cloneAll( functionReturn, castExpr->get_results() );
258 Expression *newExpr = findSingleExpression( castExpr, *this );
259 delete castExpr;
260 returnStmt->set_expr( newExpr );
261 } // if
262 }
263
264 void Resolver::visit( SingleInit *singleInit ) {
265 if ( singleInit->get_value() ) {
266#if 0
267 if (NameExpr * ne = dynamic_cast<NameExpr*>(singleInit->get_value())) {
268 string n = ne->get_name();
269 if (n == "0") {
270 initContext = new BasicType(Type::Qualifiers(),
271 BasicType::SignedInt);
272 } else {
273 DeclarationWithType * decl = lookupId(n);
274 initContext = decl->get_type();
275 }
276 } else if (ConstantExpr * e =
277 dynamic_cast<ConstantExpr*>(singleInit->get_value())) {
278 Constant *c = e->get_constant();
279 initContext = c->get_type();
280 } else {
281 assert(0);
282 }
283#endif
284 CastExpr *castExpr = new CastExpr( singleInit->get_value(), initContext->clone() );
285 Expression *newExpr = findSingleExpression( castExpr, *this );
286 delete castExpr;
287 singleInit->set_value( newExpr );
288 } // if
289// singleInit->get_value()->accept( *this );
290 }
291
292 void Resolver::visit( ListInit *listInit ) {
293 Visitor::visit(listInit);
294#if 0
295 if ( ArrayType *at = dynamic_cast<ArrayType*>(initContext) ) {
296 std::list<Initializer *>::iterator iter( listInit->begin_initializers() );
297 for ( ; iter != listInit->end_initializers(); ++iter ) {
298 initContext = at->get_base();
299 (*iter)->accept( *this );
300 } // for
301 } else if ( StructInstType *st = dynamic_cast<StructInstType*>(initContext) ) {
302 StructDecl *baseStruct = st->get_baseStruct();
303 std::list<Declaration *>::iterator iter1( baseStruct->get_members().begin() );
304 std::list<Initializer *>::iterator iter2( listInit->begin_initializers() );
305 for ( ; iter1 != baseStruct->get_members().end() && iter2 != listInit->end_initializers(); ++iter2 ) {
306 if ( (*iter2)->get_designators().empty() ) {
307 DeclarationWithType *dt = dynamic_cast<DeclarationWithType *>( *iter1 );
308 initContext = dt->get_type();
309 (*iter2)->accept( *this );
310 ++iter1;
311 } else {
312 StructDecl *st = baseStruct;
313 iter1 = st->get_members().begin();
314 std::list<Expression *>::iterator iter3( (*iter2)->get_designators().begin() );
315 for ( ; iter3 != (*iter2)->get_designators().end(); ++iter3 ) {
316 NameExpr *key = dynamic_cast<NameExpr *>( *iter3 );
317 assert( key );
318 for ( ; iter1 != st->get_members().end(); ++iter1 ) {
319 if ( key->get_name() == (*iter1)->get_name() ) {
320 (*iter1)->print( cout );
321 cout << key->get_name() << endl;
322 ObjectDecl *fred = dynamic_cast<ObjectDecl *>( *iter1 );
323 assert( fred );
324 StructInstType *mary = dynamic_cast<StructInstType*>( fred->get_type() );
325 assert( mary );
326 st = mary->get_baseStruct();
327 iter1 = st->get_members().begin();
328 break;
329 } // if
330 } // for
331 } // for
332 ObjectDecl *fred = dynamic_cast<ObjectDecl *>( *iter1 );
333 assert( fred );
334 initContext = fred->get_type();
335 (*listInit->begin_initializers())->accept( *this );
336 } // if
337 } // for
338 } else if ( UnionInstType *st = dynamic_cast<UnionInstType*>(initContext) ) {
339 DeclarationWithType *dt = dynamic_cast<DeclarationWithType *>( *st->get_baseUnion()->get_members().begin() );
340 initContext = dt->get_type();
341 (*listInit->begin_initializers())->accept( *this );
342 } // if
343#endif
344 }
345} // namespace ResolvExpr
346
347// Local Variables: //
348// tab-width: 4 //
349// mode: c++ //
350// compile-command: "make install" //
351// End: //
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