source: translator/ResolvExpr/Resolver.cc@ fe3b61b

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 fe3b61b was 6c3744e, checked in by Peter A. Buhr <pabuhr@…>, 11 years ago

add list initializer, formatting changes
  • Property mode set to 100644
File size: 9.0 KB
Line 
1#include "Resolver.h"
2#include "AlternativeFinder.h"
3#include "Alternative.h"
4#include "RenameVars.h"
5#include "ResolveTypeof.h"
6#include "SynTree/Statement.h"
7#include "SynTree/Type.h"
8#include "SynTree/Expression.h"
9#include "SynTree/Initializer.h"
10#include "SymTab/Indexer.h"
11#include "utility.h"
12
13#include <iostream>
14using namespace std;
15
16namespace ResolvExpr {
17 class Resolver : public SymTab::Indexer {
18 public:
19 Resolver() : SymTab::Indexer( false ), switchType( 0 ) {}
20
21 virtual void visit( FunctionDecl *functionDecl );
22 virtual void visit( ObjectDecl *functionDecl );
23 virtual void visit( TypeDecl *typeDecl );
24
25 virtual void visit( ExprStmt *exprStmt );
26 virtual void visit( IfStmt *ifStmt );
27 virtual void visit( WhileStmt *whileStmt );
28 virtual void visit( ForStmt *forStmt );
29 virtual void visit( SwitchStmt *switchStmt );
30 virtual void visit( ChooseStmt *switchStmt );
31 virtual void visit( CaseStmt *caseStmt );
32 virtual void visit( ReturnStmt *returnStmt );
33
34 virtual void visit( SingleInit *singleInit );
35 virtual void visit( ListInit *listInit );
36 private:
37 std::list< Type * > functionReturn;
38 Type *initContext;
39 Type *switchType;
40 };
41
42 void resolve( std::list< Declaration * > translationUnit ) {
43 Resolver resolver;
44 acceptAll( translationUnit, resolver );
45#if 0
46 for ( std::list< Declaration * >::iterator i = translationUnit.begin(); i != translationUnit.end(); ++i ) {
47 (*i)->print( std::cerr );
48 (*i)->accept( resolver );
49 } // for
50#endif
51 }
52
53 Expression *resolveInVoidContext( Expression *expr, const SymTab::Indexer &indexer ) {
54 TypeEnvironment env;
55 return resolveInVoidContext( expr, indexer, env );
56 }
57
58 namespace {
59 void finishExpr( Expression *expr, const TypeEnvironment &env ) {
60 expr->set_env( new TypeSubstitution );
61 env.makeSubstitution( *expr->get_env() );
62 }
63
64 Expression *findVoidExpression( Expression *untyped, const SymTab::Indexer &indexer ) {
65 global_renamer.reset();
66 TypeEnvironment env;
67 Expression *newExpr = resolveInVoidContext( untyped, indexer, env );
68 finishExpr( newExpr, env );
69 return newExpr;
70 }
71
72 Expression *findSingleExpression( Expression *untyped, const SymTab::Indexer &indexer ) {
73 TypeEnvironment env;
74 AlternativeFinder finder( indexer, env );
75 finder.find( untyped );
76#if 0
77 if ( finder.get_alternatives().size() != 1 ) {
78 std::cout << "untyped expr is ";
79 untyped->print( std::cout );
80 std::cout << std::endl << "alternatives are:";
81 for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) {
82 i->print( std::cout );
83 } // for
84 } // if
85#endif
86 assert( finder.get_alternatives().size() == 1 );
87 Alternative &choice = finder.get_alternatives().front();
88 Expression *newExpr = choice.expr->clone();
89 finishExpr( newExpr, choice.env );
90 return newExpr;
91 }
92
93 bool isIntegralType( Type *type ) {
94 if ( dynamic_cast< EnumInstType * >( type ) ) {
95 return true;
96 } else if ( BasicType *bt = dynamic_cast< BasicType * >( type ) ) {
97 return bt->isInteger();
98 } else {
99 return true;
100 } // if
101 }
102
103 Expression *findIntegralExpression( Expression *untyped, const SymTab::Indexer &indexer ) {
104 TypeEnvironment env;
105 AlternativeFinder finder( indexer, env );
106 finder.find( untyped );
107#if 0
108 if ( finder.get_alternatives().size() != 1 ) {
109 std::cout << "untyped expr is ";
110 untyped->print( std::cout );
111 std::cout << std::endl << "alternatives are:";
112 for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) {
113 i->print( std::cout );
114 } // for
115 } // if
116#endif
117 Expression *newExpr = 0;
118 const TypeEnvironment *newEnv = 0;
119 for ( AltList::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) {
120 if ( i->expr->get_results().size() == 1 && isIntegralType( i->expr->get_results().front() ) ) {
121 if ( newExpr ) {
122 throw SemanticError( "Too many interpretations for switch control expression", untyped );
123 } else {
124 newExpr = i->expr->clone();
125 newEnv = &i->env;
126 } // if
127 } // if
128 } // for
129 if ( !newExpr ) {
130 throw SemanticError( "Too many interpretations for switch control expression", untyped );
131 } // if
132 finishExpr( newExpr, *newEnv );
133 return newExpr;
134 }
135
136 }
137
138 void Resolver::visit( ObjectDecl *objectDecl ) {
139 Type *new_type = resolveTypeof( objectDecl->get_type(), *this );
140 objectDecl->set_type( new_type );
141 initContext = new_type;
142 SymTab::Indexer::visit( objectDecl );
143 }
144
145 void Resolver::visit( TypeDecl *typeDecl ) {
146 if ( typeDecl->get_base() ) {
147 Type *new_type = resolveTypeof( typeDecl->get_base(), *this );
148 typeDecl->set_base( new_type );
149 } // if
150 SymTab::Indexer::visit( typeDecl );
151 }
152
153 void Resolver::visit( FunctionDecl *functionDecl ) {
154#if 0
155 std::cout << "resolver visiting functiondecl ";
156 functionDecl->print( std::cout );
157 std::cout << std::endl;
158#endif
159 Type *new_type = resolveTypeof( functionDecl->get_type(), *this );
160 functionDecl->set_type( new_type );
161 std::list< Type * > oldFunctionReturn = functionReturn;
162 functionReturn.clear();
163 for ( std::list< DeclarationWithType * >::const_iterator i = functionDecl->get_functionType()->get_returnVals().begin(); i != functionDecl->get_functionType()->get_returnVals().end(); ++i ) {
164 functionReturn.push_back( (*i)->get_type() );
165 } // for
166 SymTab::Indexer::visit( functionDecl );
167 functionReturn = oldFunctionReturn;
168 }
169
170 void Resolver::visit( ExprStmt *exprStmt ) {
171 if ( exprStmt->get_expr() ) {
172 Expression *newExpr = findVoidExpression( exprStmt->get_expr(), *this );
173 delete exprStmt->get_expr();
174 exprStmt->set_expr( newExpr );
175 } // if
176 }
177
178 void Resolver::visit( IfStmt *ifStmt ) {
179 Expression *newExpr = findSingleExpression( ifStmt->get_condition(), *this );
180 delete ifStmt->get_condition();
181 ifStmt->set_condition( newExpr );
182 Visitor::visit( ifStmt );
183 }
184
185 void Resolver::visit( WhileStmt *whileStmt ) {
186 Expression *newExpr = findSingleExpression( whileStmt->get_condition(), *this );
187 delete whileStmt->get_condition();
188 whileStmt->set_condition( newExpr );
189 Visitor::visit( whileStmt );
190 }
191
192 void Resolver::visit( ForStmt *forStmt ) {
193 Expression *newExpr;
194 if ( forStmt->get_condition() ) {
195 newExpr = findSingleExpression( forStmt->get_condition(), *this );
196 delete forStmt->get_condition();
197 forStmt->set_condition( newExpr );
198 } // if
199
200 if ( forStmt->get_increment() ) {
201 newExpr = findVoidExpression( forStmt->get_increment(), *this );
202 delete forStmt->get_increment();
203 forStmt->set_increment( newExpr );
204 } // if
205
206 Visitor::visit( forStmt );
207 }
208
209 template< typename SwitchClass >
210 void handleSwitchStmt( SwitchClass *switchStmt, SymTab::Indexer &visitor ) {
211 Expression *newExpr;
212 newExpr = findIntegralExpression( switchStmt->get_condition(), visitor );
213 delete switchStmt->get_condition();
214 switchStmt->set_condition( newExpr );
215
216 visitor.Visitor::visit( switchStmt );
217 }
218
219 void Resolver::visit( SwitchStmt *switchStmt ) {
220 handleSwitchStmt( switchStmt, *this );
221 }
222
223 void Resolver::visit( ChooseStmt *switchStmt ) {
224 handleSwitchStmt( switchStmt, *this );
225 }
226
227 void Resolver::visit( CaseStmt *caseStmt ) {
228 Visitor::visit( caseStmt );
229 }
230
231 void Resolver::visit( ReturnStmt *returnStmt ) {
232 if ( returnStmt->get_expr() ) {
233 CastExpr *castExpr = new CastExpr( returnStmt->get_expr() );
234 cloneAll( functionReturn, castExpr->get_results() );
235 Expression *newExpr = findSingleExpression( castExpr, *this );
236 delete castExpr;
237 returnStmt->set_expr( newExpr );
238 } // if
239 }
240
241 void Resolver::visit( SingleInit *singleInit ) {
242 if ( singleInit->get_value() ) {
243 CastExpr *castExpr = new CastExpr( singleInit->get_value(), initContext->clone() );
244 Expression *newExpr = findSingleExpression( castExpr, *this );
245 delete castExpr;
246 singleInit->set_value( newExpr );
247 } // if
248// singleInit->get_value()->accept( *this );
249 }
250
251 void Resolver::visit( ListInit *listInit ) {
252 if ( ArrayType *at = dynamic_cast<ArrayType*>(initContext) ) {
253 initContext = at->get_base();
254 Visitor::visit( listInit );
255 } else if ( StructInstType *st = dynamic_cast<StructInstType*>(initContext) ) {
256 StructDecl *baseStruct = st->get_baseStruct();
257 std::list<Declaration *>::iterator iter1( baseStruct->get_members().begin() );
258 std::list<Initializer *>::iterator iter2( listInit->begin_initializers() );
259 for ( ; iter1 != baseStruct->get_members().end() && iter2 != listInit->end_initializers() ; ++iter1, ++iter2 ) {
260 DeclarationWithType *dt = dynamic_cast<DeclarationWithType *>( *iter1 );
261 initContext = dt->get_type();
262 (*iter2)->accept( *this );
263 }
264 } else if ( UnionInstType *st = dynamic_cast<UnionInstType*>(initContext) ) {
265 DeclarationWithType *dt = dynamic_cast<DeclarationWithType *>( *st->get_baseUnion()->get_members().begin() );
266 initContext = dt->get_type();
267 (*listInit->begin_initializers())->accept( *this );
268 } // if
269 }
270} // namespace ResolvExpr
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