source: src/SymTab/Autogen.cc@ 18f69df

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors ctor deferred_resn demangler enum forall-pointer-decay 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 18f69df was 0b4d93ab, checked in by Rob Schluntz <rschlunt@…>, 9 years ago

fix bug where field constructors would generate calls to constructors for anonymous members and unnamed bitfields
  • Property mode set to 100644
File size: 28.9 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// Autogen.cc --
8//
9// Author : Rob Schluntz
10// Created On : Thu Mar 03 15:45:56 2016
11// Last Modified By : Rob Schluntz
12// Last Modified On : Thu May 26 14:14:09 2016
13// Update Count : 1
14//
15
16#include <list>
17#include <iterator>
18#include "SynTree/Visitor.h"
19#include "SynTree/Type.h"
20#include "SynTree/Statement.h"
21#include "SynTree/TypeSubstitution.h"
22#include "Common/utility.h"
23#include "AddVisit.h"
24#include "MakeLibCfa.h"
25#include "Autogen.h"
26
27namespace SymTab {
28 class AutogenerateRoutines : public Visitor {
29 public:
30 std::list< Declaration * > &get_declsToAdd() { return declsToAdd; }
31
32 virtual void visit( EnumDecl *enumDecl );
33 virtual void visit( StructDecl *structDecl );
34 virtual void visit( UnionDecl *structDecl );
35 virtual void visit( TypeDecl *typeDecl );
36 virtual void visit( TraitDecl *ctxDecl );
37 virtual void visit( FunctionDecl *functionDecl );
38
39 virtual void visit( FunctionType *ftype );
40 virtual void visit( PointerType *ftype );
41
42 virtual void visit( CompoundStmt *compoundStmt );
43 virtual void visit( SwitchStmt *switchStmt );
44 virtual void visit( ChooseStmt *chooseStmt );
45 // virtual void visit( CaseStmt *caseStmt );
46
47 AutogenerateRoutines() : functionNesting( 0 ) {}
48 private:
49 template< typename StmtClass > void visitStatement( StmtClass *stmt );
50
51 std::list< Declaration * > declsToAdd;
52 std::set< std::string > structsDone;
53 unsigned int functionNesting; // current level of nested functions
54 };
55
56 void autogenerateRoutines( std::list< Declaration * > &translationUnit ) {
57 AutogenerateRoutines visitor;
58 acceptAndAdd( translationUnit, visitor, false );
59 }
60
61 bool isUnnamedBitfield( ObjectDecl * obj ) {
62 return obj != NULL && obj->get_name() == "" && obj->get_bitfieldWidth() != NULL;
63 }
64
65 template< typename OutputIterator >
66 void makeScalarFunction( Expression *src, ObjectDecl *dstParam, DeclarationWithType *member, std::string fname, OutputIterator out ) {
67 ObjectDecl *obj = dynamic_cast<ObjectDecl *>( member );
68 // unnamed bit fields are not copied as they cannot be accessed
69 if ( isUnnamedBitfield( obj ) ) return;
70
71 // want to be able to generate assignment, ctor, and dtor generically,
72 // so fname is either ?=?, ?{}, or ^?{}
73 UntypedExpr *fExpr = new UntypedExpr( new NameExpr( fname ) );
74
75 UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) );
76 derefExpr->get_args().push_back( new VariableExpr( dstParam ) );
77
78 // do something special for unnamed members
79 Expression *dstselect = new AddressExpr( new MemberExpr( member, derefExpr ) );
80 fExpr->get_args().push_back( dstselect );
81
82 if ( src ) {
83 fExpr->get_args().push_back( src );
84 }
85
86 *out++ = new ExprStmt( noLabels, fExpr );
87 }
88
89 template< typename OutputIterator >
90 void makeUnionFieldsAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, UnionInstType *unionType, OutputIterator out ) {
91 UntypedExpr *copy = new UntypedExpr( new NameExpr( "__builtin_memcpy" ) );
92 copy->get_args().push_back( new VariableExpr( dstParam ) );
93 copy->get_args().push_back( new AddressExpr( new VariableExpr( srcParam ) ) );
94 copy->get_args().push_back( new SizeofExpr( unionType ) );
95
96 *out++ = new ExprStmt( noLabels, copy );
97 }
98
99 //E ?=?(E volatile*, int),
100 // ?=?(E _Atomic volatile*, int);
101 void makeEnumFunctions( EnumDecl *enumDecl, EnumInstType *refType, unsigned int functionNesting, std::list< Declaration * > &declsToAdd ) {
102 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
103
104 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), refType ), 0 );
105 assignType->get_parameters().push_back( dstParam );
106
107 // void ?{}(E *); void ^?{}(E *);
108 FunctionType * ctorType = assignType->clone();
109 FunctionType * dtorType = assignType->clone();
110
111 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 );
112 assignType->get_parameters().push_back( srcParam );
113 // void ?{}(E *, E);
114 FunctionType *copyCtorType = assignType->clone();
115
116 // T ?=?(E *, E);
117 ObjectDecl *returnVal = new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 );
118 assignType->get_returnVals().push_back( returnVal );
119
120 // xxx - should we also generate void ?{}(E *, int) and E ?{}(E *, E)?
121 // right now these cases work, but that might change.
122
123 // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
124 // because each unit generates copies of the default routines for each aggregate.
125 // xxx - Temporary: make these functions intrinsic so they codegen as C assignment.
126 // Really they're something of a cross between instrinsic and autogen, so should
127 // probably make a new linkage type
128 FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, assignType, new CompoundStmt( noLabels ), true, false );
129 FunctionDecl *ctorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, ctorType, new CompoundStmt( noLabels ), true, false );
130 FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, copyCtorType, new CompoundStmt( noLabels ), true, false );
131 FunctionDecl *dtorDecl = new FunctionDecl( "^?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, dtorType, new CompoundStmt( noLabels ), true, false );
132 assignDecl->fixUniqueId();
133 ctorDecl->fixUniqueId();
134 copyCtorDecl->fixUniqueId();
135 dtorDecl->fixUniqueId();
136
137 // enum copy construct and assignment is just C-style assignment.
138 // this looks like a bad recursive call, but code gen will turn it into
139 // a C-style assignment.
140 // This happens before function pointer type conversion, so need to do it manually here
141 VariableExpr * assignVarExpr = new VariableExpr( assignDecl );
142 Type *& assignVarExprType = assignVarExpr->get_results().front();
143 assignVarExprType = new PointerType( Type::Qualifiers(), assignVarExprType );
144 ApplicationExpr * assignExpr = new ApplicationExpr( assignVarExpr );
145 assignExpr->get_args().push_back( new VariableExpr( dstParam ) );
146 assignExpr->get_args().push_back( new VariableExpr( srcParam ) );
147
148 // body is either return stmt or expr stmt
149 assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, assignExpr ) );
150 copyCtorDecl->get_statements()->get_kids().push_back( new ExprStmt( noLabels, assignExpr->clone() ) );
151
152 declsToAdd.push_back( assignDecl );
153 declsToAdd.push_back( ctorDecl );
154 declsToAdd.push_back( copyCtorDecl );
155 declsToAdd.push_back( dtorDecl );
156 }
157
158 /// Clones a reference type, replacing any parameters it may have with a clone of the provided list
159 template< typename GenericInstType >
160 GenericInstType *cloneWithParams( GenericInstType *refType, const std::list< Expression* >& params ) {
161 GenericInstType *clone = refType->clone();
162 clone->get_parameters().clear();
163 cloneAll( params, clone->get_parameters() );
164 return clone;
165 }
166
167 /// Creates a new type decl that's the same as src, but renamed and with only the ?=?, ?{} (default and copy), and ^?{} assertions (for complete types only)
168 TypeDecl *cloneAndRename( TypeDecl *src, const std::string &name ) {
169 // TypeDecl *dst = new TypeDecl( name, src->get_storageClass(), 0, src->get_kind() );
170
171 // if ( src->get_kind() == TypeDecl::Any ) {
172 // TypeInstType *opParamType = new TypeInstType( Type::Qualifiers(), name, dst );
173 // FunctionType *opFunctionType = new FunctionType( Type::Qualifiers(), false );
174 // opFunctionType->get_parameters().push_back(
175 // new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), opParamType->clone() ), 0 ) );
176 // FunctionDecl *ctorAssert = new FunctionDecl( "?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false );
177 // FunctionDecl *dtorAssert = new FunctionDecl( "^?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false );
178
179 // opFunctionType->get_parameters().push_back(
180 // new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, opParamType, 0 ) );
181 // FunctionDecl *copyCtorAssert = new FunctionDecl( "?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false );
182
183 // opFunctionType->get_returnVals().push_back(
184 // new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, opParamType->clone(), 0 ) );
185 // FunctionDecl *assignAssert = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType, 0, false, false );
186
187
188 // dst->get_assertions().push_back( assignAssert );
189 // dst->get_assertions().push_back( ctorAssert );
190 // dst->get_assertions().push_back( dtorAssert );
191 // dst->get_assertions().push_back( copyCtorAssert );
192 // }
193
194 TypeDecl *dst = new TypeDecl( src->get_name(), src->get_storageClass(), 0, src->get_kind() );
195 cloneAll(src->get_assertions(), dst->get_assertions());
196 return dst;
197 }
198
199 void makeStructMemberOp( ObjectDecl * dstParam, Expression * src, DeclarationWithType * field, FunctionDecl * func, TypeSubstitution & genericSubs, bool isGeneric, bool forward = true ) {
200 if ( isGeneric ) {
201 // rewrite member type in terms of the type variables on this operator
202 field = field->clone();
203 genericSubs.apply( field );
204
205 if ( src ) {
206 genericSubs.apply( src );
207 }
208 }
209
210 ObjectDecl * returnVal = NULL;
211 if ( ! func->get_functionType()->get_returnVals().empty() ) {
212 returnVal = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_returnVals().front() );
213 }
214
215 // assign to destination (and return value if generic)
216 if ( ArrayType *array = dynamic_cast< ArrayType * >( field->get_type() ) ) {
217 UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) );
218 derefExpr->get_args().push_back( new VariableExpr( dstParam ) );
219 Expression *dstselect = new MemberExpr( field, derefExpr );
220
221 makeArrayFunction( src, dstselect, array, func->get_name(), back_inserter( func->get_statements()->get_kids() ), forward );
222 if ( isGeneric && returnVal ) {
223 UntypedExpr *derefRet = new UntypedExpr( new NameExpr( "*?" ) );
224 derefRet->get_args().push_back( new VariableExpr( returnVal ) );
225 Expression *retselect = new MemberExpr( field, derefRet );
226
227 makeArrayFunction( src, retselect, array, func->get_name(), back_inserter( func->get_statements()->get_kids() ), forward );
228 }
229 } else {
230 makeScalarFunction( src, dstParam, field, func->get_name(), back_inserter( func->get_statements()->get_kids() ) );
231 if ( isGeneric && returnVal ) makeScalarFunction( src, returnVal, field, func->get_name(), back_inserter( func->get_statements()->get_kids() ) );
232 } // if
233 }
234
235 template<typename Iterator>
236 void makeStructFunctionBody( Iterator member, Iterator end, FunctionDecl * func, TypeSubstitution & genericSubs, bool isGeneric, bool forward = true ) {
237 for ( ; member != end; ++member ) {
238 if ( DeclarationWithType *field = dynamic_cast< DeclarationWithType * >( *member ) ) { // otherwise some form of type declaration, e.g. Aggregate
239 // query the type qualifiers of this field and skip assigning it if it is marked const.
240 // If it is an array type, we need to strip off the array layers to find its qualifiers.
241 Type * type = field->get_type();
242 while ( ArrayType * at = dynamic_cast< ArrayType * >( type ) ) {
243 type = at->get_base();
244 }
245
246 if ( type->get_qualifiers().isConst ) {
247 // don't assign const members
248 continue;
249 }
250
251 if ( field->get_name() == "" ) {
252 // don't assign to anonymous members
253 // xxx - this is a temporary fix. Anonymous members tie into
254 // our inheritance model. I think the correct way to handle this is to
255 // cast the structure to the type of the member and let the resolver
256 // figure out whether it's valid and have a pass afterwards that fixes
257 // the assignment to use pointer arithmetic with the offset of the
258 // member, much like how generic type members are handled.
259 continue;
260 }
261
262 assert( ! func->get_functionType()->get_parameters().empty() );
263 ObjectDecl * dstParam = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_parameters().front() );
264 ObjectDecl * srcParam = NULL;
265 if ( func->get_functionType()->get_parameters().size() == 2 ) {
266 srcParam = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_parameters().back() );
267 }
268 // srcParam may be NULL, in which case we have default ctor/dtor
269 assert( dstParam );
270
271 Expression *srcselect = srcParam ? new MemberExpr( field, new VariableExpr( srcParam ) ) : NULL;
272 makeStructMemberOp( dstParam, srcselect, field, func, genericSubs, isGeneric, forward );
273 } // if
274 } // for
275 } // makeStructFunctionBody
276
277 /// generate the body of a constructor which takes parameters that match fields, e.g.
278 /// void ?{}(A *, int) and void?{}(A *, int, int) for a struct A which has two int fields.
279 template<typename Iterator>
280 void makeStructFieldCtorBody( Iterator member, Iterator end, FunctionDecl * func, TypeSubstitution & genericSubs, bool isGeneric ) {
281 FunctionType * ftype = func->get_functionType();
282 std::list<DeclarationWithType*> & params = ftype->get_parameters();
283 assert( params.size() >= 2 ); // should not call this function for default ctor, etc.
284
285 // skip 'this' parameter
286 ObjectDecl * dstParam = dynamic_cast<ObjectDecl*>( params.front() );
287 assert( dstParam );
288 std::list<DeclarationWithType*>::iterator parameter = params.begin()+1;
289 for ( ; member != end; ++member ) {
290 if ( DeclarationWithType * field = dynamic_cast<DeclarationWithType*>( *member ) ) {
291 if ( isUnnamedBitfield( dynamic_cast< ObjectDecl * > ( field ) ) ) {
292 // don't make a function whose parameter is an unnamed bitfield
293 continue;
294 } else if ( field->get_name() == "" ) {
295 // don't assign to anonymous members
296 // xxx - this is a temporary fix. Anonymous members tie into
297 // our inheritance model. I think the correct way to handle this is to
298 // cast the structure to the type of the member and let the resolver
299 // figure out whether it's valid and have a pass afterwards that fixes
300 // the assignment to use pointer arithmetic with the offset of the
301 // member, much like how generic type members are handled.
302 continue;
303 } else if ( parameter != params.end() ) {
304 // matching parameter, initialize field with copy ctor
305 Expression *srcselect = new VariableExpr(*parameter);
306 makeStructMemberOp( dstParam, srcselect, field, func, genericSubs, isGeneric );
307 ++parameter;
308 } else {
309 // no matching parameter, initialize field with default ctor
310 makeStructMemberOp( dstParam, NULL, field, func, genericSubs, isGeneric );
311 }
312 }
313 }
314 }
315
316 void makeStructFunctions( StructDecl *aggregateDecl, StructInstType *refType, unsigned int functionNesting, std::list< Declaration * > & declsToAdd ) {
317 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
318
319 // Make function polymorphic in same parameters as generic struct, if applicable
320 bool isGeneric = false; // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for union)
321 std::list< TypeDecl* >& genericParams = aggregateDecl->get_parameters();
322 std::list< Expression* > structParams; // List of matching parameters to put on types
323 TypeSubstitution genericSubs; // Substitutions to make to member types of struct
324 for ( std::list< TypeDecl* >::const_iterator param = genericParams.begin(); param != genericParams.end(); ++param ) {
325 isGeneric = true;
326 TypeDecl *typeParam = cloneAndRename( *param, "_autoassign_" + aggregateDecl->get_name() + "_" + (*param)->get_name() );
327 assignType->get_forall().push_back( typeParam );
328 TypeInstType *newParamType = new TypeInstType( Type::Qualifiers(), typeParam->get_name(), typeParam );
329 genericSubs.add( (*param)->get_name(), newParamType );
330 structParams.push_back( new TypeExpr( newParamType ) );
331 }
332
333 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), cloneWithParams( refType, structParams ) ), 0 );
334 assignType->get_parameters().push_back( dstParam );
335
336 // void ?{}(T *); void ^?{}(T *);
337 FunctionType *ctorType = assignType->clone();
338 FunctionType *dtorType = assignType->clone();
339
340 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, structParams ), 0 );
341 assignType->get_parameters().push_back( srcParam );
342
343 // void ?{}(T *, T);
344 FunctionType *copyCtorType = assignType->clone();
345
346 // T ?=?(T *, T);
347 ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, structParams ), 0 );
348 assignType->get_returnVals().push_back( returnVal );
349
350 // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
351 // because each unit generates copies of the default routines for each aggregate.
352 FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false );
353 FunctionDecl *ctorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, ctorType, new CompoundStmt( noLabels ), true, false );
354 FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, copyCtorType, new CompoundStmt( noLabels ), true, false );
355 FunctionDecl *dtorDecl = new FunctionDecl( "^?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, dtorType, new CompoundStmt( noLabels ), true, false );
356 assignDecl->fixUniqueId();
357 ctorDecl->fixUniqueId();
358 copyCtorDecl->fixUniqueId();
359 dtorDecl->fixUniqueId();
360
361 // create constructors which take each member type as a parameter.
362 // for example, for struct A { int x, y; }; generate
363 // void ?{}(A *, int) and void ?{}(A *, int, int)
364 std::list<Declaration *> memCtors;
365 FunctionType * memCtorType = ctorType->clone();
366 for ( std::list<Declaration *>::iterator i = aggregateDecl->get_members().begin(); i != aggregateDecl->get_members().end(); ++i ) {
367 DeclarationWithType * member = dynamic_cast<DeclarationWithType *>( *i );
368 assert( member );
369 if ( isUnnamedBitfield( dynamic_cast< ObjectDecl * > ( member ) ) ) {
370 // don't make a function whose parameter is an unnamed bitfield
371 continue;
372 } else if ( member->get_name() == "" ) {
373 // don't assign to anonymous members
374 // xxx - this is a temporary fix. Anonymous members tie into
375 // our inheritance model. I think the correct way to handle this is to
376 // cast the structure to the type of the member and let the resolver
377 // figure out whether it's valid and have a pass afterwards that fixes
378 // the assignment to use pointer arithmetic with the offset of the
379 // member, much like how generic type members are handled.
380 continue;
381 }
382 memCtorType->get_parameters().push_back( new ObjectDecl( member->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, member->get_type()->clone(), 0 ) );
383 FunctionDecl * ctor = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, memCtorType->clone(), new CompoundStmt( noLabels ), true, false );
384 ctor->fixUniqueId();
385 makeStructFieldCtorBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), ctor, genericSubs, isGeneric );
386 memCtors.push_back( ctor );
387 }
388 delete memCtorType;
389
390 // generate appropriate calls to member ctor, assignment
391 makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), assignDecl, genericSubs, isGeneric );
392 makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), ctorDecl, genericSubs, isGeneric );
393 makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), copyCtorDecl, genericSubs, isGeneric );
394 // needs to do everything in reverse, so pass "forward" as false
395 makeStructFunctionBody( aggregateDecl->get_members().rbegin(), aggregateDecl->get_members().rend(), dtorDecl, genericSubs, isGeneric, false );
396
397 if ( ! isGeneric ) assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
398
399 declsToAdd.push_back( assignDecl );
400 declsToAdd.push_back( ctorDecl );
401 declsToAdd.push_back( copyCtorDecl );
402 declsToAdd.push_back( dtorDecl );
403 declsToAdd.splice( declsToAdd.end(), memCtors );
404 }
405
406 void makeUnionFunctions( UnionDecl *aggregateDecl, UnionInstType *refType, unsigned int functionNesting, std::list< Declaration * > & declsToAdd ) {
407 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
408
409 // Make function polymorphic in same parameters as generic union, if applicable
410 bool isGeneric = false; // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for struct)
411 std::list< TypeDecl* >& genericParams = aggregateDecl->get_parameters();
412 std::list< Expression* > unionParams; // List of matching parameters to put on types
413 for ( std::list< TypeDecl* >::const_iterator param = genericParams.begin(); param != genericParams.end(); ++param ) {
414 isGeneric = true;
415 TypeDecl *typeParam = cloneAndRename( *param, "_autoassign_" + aggregateDecl->get_name() + "_" + (*param)->get_name() );
416 assignType->get_forall().push_back( typeParam );
417 unionParams.push_back( new TypeExpr( new TypeInstType( Type::Qualifiers(), typeParam->get_name(), typeParam ) ) );
418 }
419
420 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), cloneWithParams( refType, unionParams ) ), 0 );
421 assignType->get_parameters().push_back( dstParam );
422
423 // default ctor/dtor need only first parameter
424 FunctionType * ctorType = assignType->clone();
425 FunctionType * dtorType = assignType->clone();
426
427 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, unionParams ), 0 );
428 assignType->get_parameters().push_back( srcParam );
429
430 // copy ctor needs both parameters
431 FunctionType * copyCtorType = assignType->clone();
432
433 // assignment needs both and return value
434 ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, unionParams ), 0 );
435 assignType->get_returnVals().push_back( returnVal );
436
437 // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
438 // because each unit generates copies of the default routines for each aggregate.
439 FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false );
440 FunctionDecl *ctorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, ctorType, new CompoundStmt( noLabels ), true, false );
441 FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, copyCtorType, NULL, true, false );
442 FunctionDecl *dtorDecl = new FunctionDecl( "^?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, dtorType, new CompoundStmt( noLabels ), true, false );
443
444 assignDecl->fixUniqueId();
445 ctorDecl->fixUniqueId();
446 copyCtorDecl->fixUniqueId();
447 dtorDecl->fixUniqueId();
448
449 makeUnionFieldsAssignment( srcParam, dstParam, cloneWithParams( refType, unionParams ), back_inserter( assignDecl->get_statements()->get_kids() ) );
450 if ( isGeneric ) makeUnionFieldsAssignment( srcParam, returnVal, cloneWithParams( refType, unionParams ), back_inserter( assignDecl->get_statements()->get_kids() ) );
451
452 if ( ! isGeneric ) assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
453
454 // body of assignment and copy ctor is the same
455 copyCtorDecl->set_statements( assignDecl->get_statements()->clone() );
456
457 declsToAdd.push_back( assignDecl );
458 declsToAdd.push_back( ctorDecl );
459 declsToAdd.push_back( copyCtorDecl );
460 declsToAdd.push_back( dtorDecl );
461 }
462
463 void AutogenerateRoutines::visit( EnumDecl *enumDecl ) {
464 if ( ! enumDecl->get_members().empty() ) {
465 EnumInstType *enumInst = new EnumInstType( Type::Qualifiers(), enumDecl->get_name() );
466 // enumInst->set_baseEnum( enumDecl );
467 // declsToAdd.push_back(
468 makeEnumFunctions( enumDecl, enumInst, functionNesting, declsToAdd );
469 }
470 }
471
472 void AutogenerateRoutines::visit( StructDecl *structDecl ) {
473 if ( ! structDecl->get_members().empty() && structsDone.find( structDecl->get_name() ) == structsDone.end() ) {
474 StructInstType structInst( Type::Qualifiers(), structDecl->get_name() );
475 structInst.set_baseStruct( structDecl );
476 makeStructFunctions( structDecl, &structInst, functionNesting, declsToAdd );
477 structsDone.insert( structDecl->get_name() );
478 } // if
479 }
480
481 void AutogenerateRoutines::visit( UnionDecl *unionDecl ) {
482 if ( ! unionDecl->get_members().empty() ) {
483 UnionInstType unionInst( Type::Qualifiers(), unionDecl->get_name() );
484 unionInst.set_baseUnion( unionDecl );
485 makeUnionFunctions( unionDecl, &unionInst, functionNesting, declsToAdd );
486 } // if
487 }
488
489 void AutogenerateRoutines::visit( TypeDecl *typeDecl ) {
490 CompoundStmt *stmts = 0;
491 TypeInstType *typeInst = new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), false );
492 typeInst->set_baseType( typeDecl );
493 ObjectDecl *src = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst->clone(), 0 );
494 ObjectDecl *dst = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), typeInst->clone() ), 0 );
495 if ( typeDecl->get_base() ) {
496 // xxx - generate ctor/dtors for typedecls, e.g.
497 // otype T = int *;
498 stmts = new CompoundStmt( std::list< Label >() );
499 UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );
500 assign->get_args().push_back( new CastExpr( new VariableExpr( dst ), new PointerType( Type::Qualifiers(), typeDecl->get_base()->clone() ) ) );
501 assign->get_args().push_back( new CastExpr( new VariableExpr( src ), typeDecl->get_base()->clone() ) );
502 stmts->get_kids().push_back( new ReturnStmt( std::list< Label >(), assign ) );
503 } // if
504 FunctionType *type = new FunctionType( Type::Qualifiers(), false );
505 type->get_returnVals().push_back( new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst, 0 ) );
506 type->get_parameters().push_back( dst );
507 type->get_parameters().push_back( src );
508 FunctionDecl *func = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::AutoGen, type, stmts, true, false );
509 declsToAdd.push_back( func );
510 }
511
512 void addDecls( std::list< Declaration * > &declsToAdd, std::list< Statement * > &statements, std::list< Statement * >::iterator i ) {
513 for ( std::list< Declaration * >::iterator decl = declsToAdd.begin(); decl != declsToAdd.end(); ++decl ) {
514 statements.insert( i, new DeclStmt( noLabels, *decl ) );
515 } // for
516 declsToAdd.clear();
517 }
518
519 void AutogenerateRoutines::visit( FunctionType *) {
520 // ensure that we don't add assignment ops for types defined as part of the function
521 }
522
523 void AutogenerateRoutines::visit( PointerType *) {
524 // ensure that we don't add assignment ops for types defined as part of the pointer
525 }
526
527 void AutogenerateRoutines::visit( TraitDecl *) {
528 // ensure that we don't add assignment ops for types defined as part of the trait
529 }
530
531 template< typename StmtClass >
532 inline void AutogenerateRoutines::visitStatement( StmtClass *stmt ) {
533 std::set< std::string > oldStructs = structsDone;
534 addVisit( stmt, *this );
535 structsDone = oldStructs;
536 }
537
538 void AutogenerateRoutines::visit( FunctionDecl *functionDecl ) {
539 maybeAccept( functionDecl->get_functionType(), *this );
540 acceptAll( functionDecl->get_oldDecls(), *this );
541 functionNesting += 1;
542 maybeAccept( functionDecl->get_statements(), *this );
543 functionNesting -= 1;
544 }
545
546 void AutogenerateRoutines::visit( CompoundStmt *compoundStmt ) {
547 visitStatement( compoundStmt );
548 }
549
550 void AutogenerateRoutines::visit( SwitchStmt *switchStmt ) {
551 visitStatement( switchStmt );
552 }
553
554 void AutogenerateRoutines::visit( ChooseStmt *switchStmt ) {
555 visitStatement( switchStmt );
556 }
557
558 // void AutogenerateRoutines::visit( CaseStmt *caseStmt ) {
559 // visitStatement( caseStmt );
560 // }
561} // SymTab
Note: See TracBrowser for help on using the repository browser.