source: src/SymTab/Autogen.cc@ 2ee5426

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 2ee5426 was 906e24d, checked in by Rob Schluntz <rschlunt@…>, 9 years ago

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