source: src/SymTab/Autogen.cc@ 1b29996

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 1b29996 was 9f70ab57, checked in by Rob Schluntz <rschlunt@…>, 9 years ago

add forward declarations for autogenerated functions so that a struct becomes an otype as soon as its body is closed
  • Property mode set to 100644
File size: 29.2 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 : Peter A. Buhr
12// Last Modified On : Tue Jul 12 17:47:17 2016
13// Update Count : 2
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 Type * SizeType = 0;
29
30 class AutogenerateRoutines : public Visitor {
31 public:
32 std::list< Declaration * > &get_declsToAdd() { return declsToAdd; }
33
34 virtual void visit( EnumDecl *enumDecl );
35 virtual void visit( StructDecl *structDecl );
36 virtual void visit( UnionDecl *structDecl );
37 virtual void visit( TypeDecl *typeDecl );
38 virtual void visit( TraitDecl *ctxDecl );
39 virtual void visit( FunctionDecl *functionDecl );
40
41 virtual void visit( FunctionType *ftype );
42 virtual void visit( PointerType *ftype );
43
44 virtual void visit( CompoundStmt *compoundStmt );
45 virtual void visit( SwitchStmt *switchStmt );
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 makeUnionFieldsAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, OutputIterator out ) {
67 UntypedExpr *copy = new UntypedExpr( new NameExpr( "__builtin_memcpy" ) );
68 copy->get_args().push_back( new VariableExpr( dstParam ) );
69 copy->get_args().push_back( new AddressExpr( new VariableExpr( srcParam ) ) );
70 copy->get_args().push_back( new SizeofExpr( srcParam->get_type()->clone() ) );
71
72 *out++ = new ExprStmt( noLabels, copy );
73 }
74
75 //E ?=?(E volatile*, int),
76 // ?=?(E _Atomic volatile*, int);
77 void makeEnumFunctions( EnumDecl *enumDecl, EnumInstType *refType, unsigned int functionNesting, std::list< Declaration * > &declsToAdd ) {
78 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
79
80 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), refType ), 0 );
81 assignType->get_parameters().push_back( dstParam );
82
83 // void ?{}(E *); void ^?{}(E *);
84 FunctionType * ctorType = assignType->clone();
85 FunctionType * dtorType = assignType->clone();
86
87 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 );
88 assignType->get_parameters().push_back( srcParam );
89 // void ?{}(E *, E);
90 FunctionType *copyCtorType = assignType->clone();
91
92 // T ?=?(E *, E);
93 ObjectDecl *returnVal = new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 );
94 assignType->get_returnVals().push_back( returnVal );
95
96 // xxx - should we also generate void ?{}(E *, int) and E ?{}(E *, E)?
97 // right now these cases work, but that might change.
98
99 // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
100 // because each unit generates copies of the default routines for each aggregate.
101 // xxx - Temporary: make these functions intrinsic so they codegen as C assignment.
102 // Really they're something of a cross between instrinsic and autogen, so should
103 // probably make a new linkage type
104 FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, assignType, new CompoundStmt( noLabels ), true, false );
105 FunctionDecl *ctorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, ctorType, new CompoundStmt( noLabels ), true, false );
106 FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, copyCtorType, new CompoundStmt( noLabels ), true, false );
107 FunctionDecl *dtorDecl = new FunctionDecl( "^?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, dtorType, new CompoundStmt( noLabels ), true, false );
108 assignDecl->fixUniqueId();
109 ctorDecl->fixUniqueId();
110 copyCtorDecl->fixUniqueId();
111 dtorDecl->fixUniqueId();
112
113 // enum copy construct and assignment is just C-style assignment.
114 // this looks like a bad recursive call, but code gen will turn it into
115 // a C-style assignment.
116 // This happens before function pointer type conversion, so need to do it manually here
117 VariableExpr * assignVarExpr = new VariableExpr( assignDecl );
118 Type *& assignVarExprType = assignVarExpr->get_results().front();
119 assignVarExprType = new PointerType( Type::Qualifiers(), assignVarExprType );
120 ApplicationExpr * assignExpr = new ApplicationExpr( assignVarExpr );
121 assignExpr->get_args().push_back( new VariableExpr( dstParam ) );
122 assignExpr->get_args().push_back( new VariableExpr( srcParam ) );
123
124 // body is either return stmt or expr stmt
125 assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, assignExpr ) );
126 copyCtorDecl->get_statements()->get_kids().push_back( new ExprStmt( noLabels, assignExpr->clone() ) );
127
128 declsToAdd.push_back( assignDecl );
129 declsToAdd.push_back( ctorDecl );
130 declsToAdd.push_back( copyCtorDecl );
131 declsToAdd.push_back( dtorDecl );
132 }
133
134 /// Clones a reference type, replacing any parameters it may have with a clone of the provided list
135 template< typename GenericInstType >
136 GenericInstType *cloneWithParams( GenericInstType *refType, const std::list< Expression* >& params ) {
137 GenericInstType *clone = refType->clone();
138 clone->get_parameters().clear();
139 cloneAll( params, clone->get_parameters() );
140 return clone;
141 }
142
143 /// 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)
144 TypeDecl *cloneAndRename( TypeDecl *src, const std::string &name ) {
145 // TypeDecl *dst = new TypeDecl( name, src->get_storageClass(), 0, src->get_kind() );
146
147 // if ( src->get_kind() == TypeDecl::Any ) {
148 // TypeInstType *opParamType = new TypeInstType( Type::Qualifiers(), name, dst );
149 // FunctionType *opFunctionType = new FunctionType( Type::Qualifiers(), false );
150 // opFunctionType->get_parameters().push_back(
151 // new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), opParamType->clone() ), 0 ) );
152 // FunctionDecl *ctorAssert = new FunctionDecl( "?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false );
153 // FunctionDecl *dtorAssert = new FunctionDecl( "^?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false );
154
155 // opFunctionType->get_parameters().push_back(
156 // new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, opParamType, 0 ) );
157 // FunctionDecl *copyCtorAssert = new FunctionDecl( "?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false );
158
159 // opFunctionType->get_returnVals().push_back(
160 // new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, opParamType->clone(), 0 ) );
161 // FunctionDecl *assignAssert = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType, 0, false, false );
162
163
164 // dst->get_assertions().push_back( assignAssert );
165 // dst->get_assertions().push_back( ctorAssert );
166 // dst->get_assertions().push_back( dtorAssert );
167 // dst->get_assertions().push_back( copyCtorAssert );
168 // }
169
170 TypeDecl *dst = new TypeDecl( src->get_name(), src->get_storageClass(), 0, src->get_kind() );
171 cloneAll(src->get_assertions(), dst->get_assertions());
172 return dst;
173 }
174
175 void makeStructMemberOp( ObjectDecl * dstParam, Expression * src, DeclarationWithType * field, FunctionDecl * func, TypeSubstitution & genericSubs, bool isDynamicLayout, bool forward = true ) {
176// if ( isDynamicLayout && src ) {
177// genericSubs.apply( src );
178// }
179
180 ObjectDecl * returnVal = NULL;
181 if ( ! func->get_functionType()->get_returnVals().empty() ) {
182 returnVal = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_returnVals().front() );
183 }
184
185 InitTweak::InitExpander srcParam( src );
186
187 // assign to destination (and return value if generic)
188 UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) );
189 derefExpr->get_args().push_back( new VariableExpr( dstParam ) );
190 Expression *dstselect = new MemberExpr( field, derefExpr );
191 genImplicitCall( srcParam, dstselect, func->get_name(), back_inserter( func->get_statements()->get_kids() ), field, forward );
192
193 if ( isDynamicLayout && returnVal ) {
194 UntypedExpr *derefRet = new UntypedExpr( new NameExpr( "*?" ) );
195 derefRet->get_args().push_back( new VariableExpr( returnVal ) );
196 Expression *retselect = new MemberExpr( field, derefRet );
197 genImplicitCall( srcParam, retselect, func->get_name(), back_inserter( func->get_statements()->get_kids() ), field, forward );
198 } // if
199 }
200
201 template<typename Iterator>
202 void makeStructFunctionBody( Iterator member, Iterator end, FunctionDecl * func, TypeSubstitution & genericSubs, bool isDynamicLayout, bool forward = true ) {
203 for ( ; member != end; ++member ) {
204 if ( DeclarationWithType *field = dynamic_cast< DeclarationWithType * >( *member ) ) { // otherwise some form of type declaration, e.g. Aggregate
205 // query the type qualifiers of this field and skip assigning it if it is marked const.
206 // If it is an array type, we need to strip off the array layers to find its qualifiers.
207 Type * type = field->get_type();
208 while ( ArrayType * at = dynamic_cast< ArrayType * >( type ) ) {
209 type = at->get_base();
210 }
211
212 if ( type->get_qualifiers().isConst && func->get_name() == "?=?" ) {
213 // don't assign const members, but do construct/destruct
214 continue;
215 }
216
217 if ( field->get_name() == "" ) {
218 // don't assign to anonymous members
219 // xxx - this is a temporary fix. Anonymous members tie into
220 // our inheritance model. I think the correct way to handle this is to
221 // cast the structure to the type of the member and let the resolver
222 // figure out whether it's valid and have a pass afterwards that fixes
223 // the assignment to use pointer arithmetic with the offset of the
224 // member, much like how generic type members are handled.
225 continue;
226 }
227
228 assert( ! func->get_functionType()->get_parameters().empty() );
229 ObjectDecl * dstParam = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_parameters().front() );
230 ObjectDecl * srcParam = NULL;
231 if ( func->get_functionType()->get_parameters().size() == 2 ) {
232 srcParam = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_parameters().back() );
233 }
234 // srcParam may be NULL, in which case we have default ctor/dtor
235 assert( dstParam );
236
237 Expression *srcselect = srcParam ? new MemberExpr( field, new VariableExpr( srcParam ) ) : NULL;
238 makeStructMemberOp( dstParam, srcselect, field, func, genericSubs, isDynamicLayout, forward );
239 } // if
240 } // for
241 } // makeStructFunctionBody
242
243 /// generate the body of a constructor which takes parameters that match fields, e.g.
244 /// void ?{}(A *, int) and void?{}(A *, int, int) for a struct A which has two int fields.
245 template<typename Iterator>
246 void makeStructFieldCtorBody( Iterator member, Iterator end, FunctionDecl * func, TypeSubstitution & genericSubs, bool isDynamicLayout ) {
247 FunctionType * ftype = func->get_functionType();
248 std::list<DeclarationWithType*> & params = ftype->get_parameters();
249 assert( params.size() >= 2 ); // should not call this function for default ctor, etc.
250
251 // skip 'this' parameter
252 ObjectDecl * dstParam = dynamic_cast<ObjectDecl*>( params.front() );
253 assert( dstParam );
254 std::list<DeclarationWithType*>::iterator parameter = params.begin()+1;
255 for ( ; member != end; ++member ) {
256 if ( DeclarationWithType * field = dynamic_cast<DeclarationWithType*>( *member ) ) {
257 if ( isUnnamedBitfield( dynamic_cast< ObjectDecl * > ( field ) ) ) {
258 // don't make a function whose parameter is an unnamed bitfield
259 continue;
260 } else if ( field->get_name() == "" ) {
261 // don't assign to anonymous members
262 // xxx - this is a temporary fix. Anonymous members tie into
263 // our inheritance model. I think the correct way to handle this is to
264 // cast the structure to the type of the member and let the resolver
265 // figure out whether it's valid and have a pass afterwards that fixes
266 // the assignment to use pointer arithmetic with the offset of the
267 // member, much like how generic type members are handled.
268 continue;
269 } else if ( parameter != params.end() ) {
270 // matching parameter, initialize field with copy ctor
271 Expression *srcselect = new VariableExpr(*parameter);
272 makeStructMemberOp( dstParam, srcselect, field, func, genericSubs, isDynamicLayout );
273 ++parameter;
274 } else {
275 // no matching parameter, initialize field with default ctor
276 makeStructMemberOp( dstParam, NULL, field, func, genericSubs, isDynamicLayout );
277 }
278 }
279 }
280 }
281
282 void addForwardDecl( FunctionDecl * functionDecl, std::list< Declaration * > & declsToAdd ) {
283 FunctionDecl * decl = functionDecl->clone();
284 delete decl->get_statements();
285 decl->set_statements( NULL );
286 declsToAdd.push_back( decl );
287 decl->fixUniqueId();
288 }
289
290 void makeStructFunctions( StructDecl *aggregateDecl, StructInstType *refType, unsigned int functionNesting, std::list< Declaration * > & declsToAdd ) {
291 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
292
293 // Make function polymorphic in same parameters as generic struct, if applicable
294 bool isDynamicLayout = false; // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for union)
295 std::list< TypeDecl* >& genericParams = aggregateDecl->get_parameters();
296 std::list< Expression* > structParams; // List of matching parameters to put on types
297 TypeSubstitution genericSubs; // Substitutions to make to member types of struct
298 for ( std::list< TypeDecl* >::const_iterator param = genericParams.begin(); param != genericParams.end(); ++param ) {
299 if ( (*param)->get_kind() == TypeDecl::Any ) isDynamicLayout = true;
300 TypeDecl *typeParam = cloneAndRename( *param, "_autoassign_" + aggregateDecl->get_name() + "_" + (*param)->get_name() );
301 assignType->get_forall().push_back( typeParam );
302 TypeInstType *newParamType = new TypeInstType( Type::Qualifiers(), typeParam->get_name(), typeParam );
303 genericSubs.add( (*param)->get_name(), newParamType );
304 structParams.push_back( new TypeExpr( newParamType ) );
305 }
306
307 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), cloneWithParams( refType, structParams ) ), 0 );
308 assignType->get_parameters().push_back( dstParam );
309
310 // void ?{}(T *); void ^?{}(T *);
311 FunctionType *ctorType = assignType->clone();
312 FunctionType *dtorType = assignType->clone();
313
314 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, structParams ), 0 );
315 assignType->get_parameters().push_back( srcParam );
316
317 // void ?{}(T *, T);
318 FunctionType *copyCtorType = assignType->clone();
319
320 // T ?=?(T *, T);
321 ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, structParams ), 0 );
322 assignType->get_returnVals().push_back( returnVal );
323
324 // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
325 // because each unit generates copies of the default routines for each aggregate.
326 FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false );
327 FunctionDecl *ctorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, ctorType, new CompoundStmt( noLabels ), true, false );
328 FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, copyCtorType, new CompoundStmt( noLabels ), true, false );
329 FunctionDecl *dtorDecl = new FunctionDecl( "^?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, dtorType, new CompoundStmt( noLabels ), true, false );
330 assignDecl->fixUniqueId();
331 ctorDecl->fixUniqueId();
332 copyCtorDecl->fixUniqueId();
333 dtorDecl->fixUniqueId();
334
335 if ( functionNesting == 0 ) {
336 // forward declare if top-level struct, so that
337 // type is complete as soon as its body ends
338 addForwardDecl( assignDecl, declsToAdd );
339 addForwardDecl( ctorDecl, declsToAdd );
340 addForwardDecl( copyCtorDecl, declsToAdd );
341 addForwardDecl( dtorDecl, declsToAdd );
342 }
343
344 // create constructors which take each member type as a parameter.
345 // for example, for struct A { int x, y; }; generate
346 // void ?{}(A *, int) and void ?{}(A *, int, int)
347 std::list<Declaration *> memCtors;
348 FunctionType * memCtorType = ctorType->clone();
349 for ( std::list<Declaration *>::iterator i = aggregateDecl->get_members().begin(); i != aggregateDecl->get_members().end(); ++i ) {
350 DeclarationWithType * member = dynamic_cast<DeclarationWithType *>( *i );
351 assert( member );
352 if ( isUnnamedBitfield( dynamic_cast< ObjectDecl * > ( member ) ) ) {
353 // don't make a function whose parameter is an unnamed bitfield
354 continue;
355 } else if ( member->get_name() == "" ) {
356 // don't assign to anonymous members
357 // xxx - this is a temporary fix. Anonymous members tie into
358 // our inheritance model. I think the correct way to handle this is to
359 // cast the structure to the type of the member and let the resolver
360 // figure out whether it's valid and have a pass afterwards that fixes
361 // the assignment to use pointer arithmetic with the offset of the
362 // member, much like how generic type members are handled.
363 continue;
364 }
365 memCtorType->get_parameters().push_back( new ObjectDecl( member->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, member->get_type()->clone(), 0 ) );
366 FunctionDecl * ctor = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, memCtorType->clone(), new CompoundStmt( noLabels ), true, false );
367 ctor->fixUniqueId();
368 makeStructFieldCtorBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), ctor, genericSubs, isDynamicLayout );
369 memCtors.push_back( ctor );
370 }
371 delete memCtorType;
372
373 // generate appropriate calls to member ctor, assignment
374 makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), assignDecl, genericSubs, isDynamicLayout );
375 makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), ctorDecl, genericSubs, isDynamicLayout );
376 makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), copyCtorDecl, genericSubs, isDynamicLayout );
377 // needs to do everything in reverse, so pass "forward" as false
378 makeStructFunctionBody( aggregateDecl->get_members().rbegin(), aggregateDecl->get_members().rend(), dtorDecl, genericSubs, isDynamicLayout, false );
379
380 if ( ! isDynamicLayout ) assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
381
382 declsToAdd.push_back( assignDecl );
383 declsToAdd.push_back( ctorDecl );
384 declsToAdd.push_back( copyCtorDecl );
385 declsToAdd.push_back( dtorDecl );
386 declsToAdd.splice( declsToAdd.end(), memCtors );
387 }
388
389 void makeUnionFunctions( UnionDecl *aggregateDecl, UnionInstType *refType, unsigned int functionNesting, std::list< Declaration * > & declsToAdd ) {
390 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
391
392 // Make function polymorphic in same parameters as generic union, if applicable
393 bool isDynamicLayout = false; // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for struct)
394 std::list< TypeDecl* >& genericParams = aggregateDecl->get_parameters();
395 std::list< Expression* > unionParams; // List of matching parameters to put on types
396 for ( std::list< TypeDecl* >::const_iterator param = genericParams.begin(); param != genericParams.end(); ++param ) {
397 if ( (*param)->get_kind() == TypeDecl::Any ) isDynamicLayout = true;
398 TypeDecl *typeParam = cloneAndRename( *param, "_autoassign_" + aggregateDecl->get_name() + "_" + (*param)->get_name() );
399 assignType->get_forall().push_back( typeParam );
400 unionParams.push_back( new TypeExpr( new TypeInstType( Type::Qualifiers(), typeParam->get_name(), typeParam ) ) );
401 }
402
403 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), cloneWithParams( refType, unionParams ) ), 0 );
404 assignType->get_parameters().push_back( dstParam );
405
406 // default ctor/dtor need only first parameter
407 FunctionType * ctorType = assignType->clone();
408 FunctionType * dtorType = assignType->clone();
409
410 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, unionParams ), 0 );
411 assignType->get_parameters().push_back( srcParam );
412
413 // copy ctor needs both parameters
414 FunctionType * copyCtorType = assignType->clone();
415
416 // assignment needs both and return value
417 ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, unionParams ), 0 );
418 assignType->get_returnVals().push_back( returnVal );
419
420 // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
421 // because each unit generates copies of the default routines for each aggregate.
422 FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false );
423 FunctionDecl *ctorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, ctorType, new CompoundStmt( noLabels ), true, false );
424 FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, copyCtorType, NULL, true, false );
425 FunctionDecl *dtorDecl = new FunctionDecl( "^?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, dtorType, new CompoundStmt( noLabels ), true, false );
426
427 assignDecl->fixUniqueId();
428 ctorDecl->fixUniqueId();
429 copyCtorDecl->fixUniqueId();
430 dtorDecl->fixUniqueId();
431
432 makeUnionFieldsAssignment( srcParam, dstParam, back_inserter( assignDecl->get_statements()->get_kids() ) );
433 if ( isDynamicLayout ) makeUnionFieldsAssignment( srcParam, returnVal, back_inserter( assignDecl->get_statements()->get_kids() ) );
434 else assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
435
436 // body of assignment and copy ctor is the same
437 copyCtorDecl->set_statements( assignDecl->get_statements()->clone() );
438
439 // create a constructor which takes the first member type as a parameter.
440 // for example, for Union A { int x; double y; }; generate
441 // void ?{}(A *, int)
442 // This is to mimic C's behaviour which initializes the first member of the union.
443 std::list<Declaration *> memCtors;
444 for ( Declaration * member : aggregateDecl->get_members() ) {
445 if ( DeclarationWithType * field = dynamic_cast< DeclarationWithType * >( member ) ) {
446 ObjectDecl * srcParam = new ObjectDecl( "src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, field->get_type()->clone(), 0 );
447
448 FunctionType * memCtorType = ctorType->clone();
449 memCtorType->get_parameters().push_back( srcParam );
450 FunctionDecl * ctor = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, memCtorType, new CompoundStmt( noLabels ), true, false );
451 ctor->fixUniqueId();
452
453 makeUnionFieldsAssignment( srcParam, dstParam, back_inserter( ctor->get_statements()->get_kids() ) );
454 memCtors.push_back( ctor );
455 // only generate a ctor for the first field
456 break;
457 }
458 }
459
460 declsToAdd.push_back( assignDecl );
461 declsToAdd.push_back( ctorDecl );
462 declsToAdd.push_back( copyCtorDecl );
463 declsToAdd.push_back( dtorDecl );
464 declsToAdd.splice( declsToAdd.end(), memCtors );
465 }
466
467 void AutogenerateRoutines::visit( EnumDecl *enumDecl ) {
468 if ( ! enumDecl->get_members().empty() ) {
469 EnumInstType *enumInst = new EnumInstType( Type::Qualifiers(), enumDecl->get_name() );
470 // enumInst->set_baseEnum( enumDecl );
471 // declsToAdd.push_back(
472 makeEnumFunctions( enumDecl, enumInst, functionNesting, declsToAdd );
473 }
474 }
475
476 void AutogenerateRoutines::visit( StructDecl *structDecl ) {
477 if ( ! structDecl->get_members().empty() && structsDone.find( structDecl->get_name() ) == structsDone.end() ) {
478 StructInstType structInst( Type::Qualifiers(), structDecl->get_name() );
479 structInst.set_baseStruct( structDecl );
480 makeStructFunctions( structDecl, &structInst, functionNesting, declsToAdd );
481 structsDone.insert( structDecl->get_name() );
482 } // if
483 }
484
485 void AutogenerateRoutines::visit( UnionDecl *unionDecl ) {
486 if ( ! unionDecl->get_members().empty() ) {
487 UnionInstType unionInst( Type::Qualifiers(), unionDecl->get_name() );
488 unionInst.set_baseUnion( unionDecl );
489 makeUnionFunctions( unionDecl, &unionInst, functionNesting, declsToAdd );
490 } // if
491 }
492
493 void AutogenerateRoutines::visit( TypeDecl *typeDecl ) {
494 CompoundStmt *stmts = 0;
495 TypeInstType *typeInst = new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), false );
496 typeInst->set_baseType( typeDecl );
497 ObjectDecl *src = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst->clone(), 0 );
498 ObjectDecl *dst = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), typeInst->clone() ), 0 );
499 if ( typeDecl->get_base() ) {
500 // xxx - generate ctor/dtors for typedecls, e.g.
501 // otype T = int *;
502 stmts = new CompoundStmt( std::list< Label >() );
503 UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );
504 assign->get_args().push_back( new CastExpr( new VariableExpr( dst ), new PointerType( Type::Qualifiers(), typeDecl->get_base()->clone() ) ) );
505 assign->get_args().push_back( new CastExpr( new VariableExpr( src ), typeDecl->get_base()->clone() ) );
506 stmts->get_kids().push_back( new ReturnStmt( std::list< Label >(), assign ) );
507 } // if
508 FunctionType *type = new FunctionType( Type::Qualifiers(), false );
509 type->get_returnVals().push_back( new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst, 0 ) );
510 type->get_parameters().push_back( dst );
511 type->get_parameters().push_back( src );
512 FunctionDecl *func = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::AutoGen, type, stmts, true, false );
513 declsToAdd.push_back( func );
514 }
515
516 void addDecls( std::list< Declaration * > &declsToAdd, std::list< Statement * > &statements, std::list< Statement * >::iterator i ) {
517 for ( std::list< Declaration * >::iterator decl = declsToAdd.begin(); decl != declsToAdd.end(); ++decl ) {
518 statements.insert( i, new DeclStmt( noLabels, *decl ) );
519 } // for
520 declsToAdd.clear();
521 }
522
523 void AutogenerateRoutines::visit( FunctionType *) {
524 // ensure that we don't add assignment ops for types defined as part of the function
525 }
526
527 void AutogenerateRoutines::visit( PointerType *) {
528 // ensure that we don't add assignment ops for types defined as part of the pointer
529 }
530
531 void AutogenerateRoutines::visit( TraitDecl *) {
532 // ensure that we don't add assignment ops for types defined as part of the trait
533 }
534
535 template< typename StmtClass >
536 inline void AutogenerateRoutines::visitStatement( StmtClass *stmt ) {
537 std::set< std::string > oldStructs = structsDone;
538 addVisit( stmt, *this );
539 structsDone = oldStructs;
540 }
541
542 void AutogenerateRoutines::visit( FunctionDecl *functionDecl ) {
543 maybeAccept( functionDecl->get_functionType(), *this );
544 acceptAll( functionDecl->get_oldDecls(), *this );
545 functionNesting += 1;
546 maybeAccept( functionDecl->get_statements(), *this );
547 functionNesting -= 1;
548 }
549
550 void AutogenerateRoutines::visit( CompoundStmt *compoundStmt ) {
551 visitStatement( compoundStmt );
552 }
553
554 void AutogenerateRoutines::visit( SwitchStmt *switchStmt ) {
555 visitStatement( switchStmt );
556 }
557} // SymTab
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