source: src/SymTab/Autogen.cc@ 0b1376f

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 0b1376f was e4d3ceb, checked in by Peter A. Buhr <pabuhr@…>, 9 years ago

Merge branch 'master' of plg2:software/cfa/cfa-cc
  • 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 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
45 AutogenerateRoutines() : functionNesting( 0 ) {}
46 private:
47 template< typename StmtClass > void visitStatement( StmtClass *stmt );
48
49 std::list< Declaration * > declsToAdd;
50 std::set< std::string > structsDone;
51 unsigned int functionNesting; // current level of nested functions
52 };
53
54 void autogenerateRoutines( std::list< Declaration * > &translationUnit ) {
55 AutogenerateRoutines visitor;
56 acceptAndAdd( translationUnit, visitor, false );
57 }
58
59 bool isUnnamedBitfield( ObjectDecl * obj ) {
60 return obj != NULL && obj->get_name() == "" && obj->get_bitfieldWidth() != NULL;
61 }
62
63 template< typename OutputIterator >
64 void makeScalarFunction( Expression *src, ObjectDecl *dstParam, DeclarationWithType *member, std::string fname, OutputIterator out ) {
65 ObjectDecl *obj = dynamic_cast<ObjectDecl *>( member );
66 // unnamed bit fields are not copied as they cannot be accessed
67 if ( isUnnamedBitfield( obj ) ) return;
68
69 // want to be able to generate assignment, ctor, and dtor generically,
70 // so fname is either ?=?, ?{}, or ^?{}
71 UntypedExpr *fExpr = new UntypedExpr( new NameExpr( fname ) );
72
73 UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) );
74 derefExpr->get_args().push_back( new VariableExpr( dstParam ) );
75
76 // do something special for unnamed members
77 Expression *dstselect = new AddressExpr( new MemberExpr( member, derefExpr ) );
78 fExpr->get_args().push_back( dstselect );
79
80 if ( src ) {
81 fExpr->get_args().push_back( src );
82 }
83
84 Statement * callStmt = new ExprStmt( noLabels, fExpr );
85 if ( (fname == "?{}" || fname == "^?{}") && ( !obj || ( obj && obj->get_bitfieldWidth() == NULL ) ) ) {
86 // implicitly generated ctor/dtor calls should be wrapped
87 // so that later passes are aware they were generated.
88 // xxx - don't mark as an implicit ctor/dtor if obj is a bitfield,
89 // because this causes the address to be taken at codegen, which is illegal in C.
90 callStmt = new ImplicitCtorDtorStmt( callStmt );
91 }
92 *out++ = callStmt;
93 }
94
95 template< typename OutputIterator >
96 void makeUnionFieldsAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, UnionInstType *unionType, OutputIterator out ) {
97 UntypedExpr *copy = new UntypedExpr( new NameExpr( "__builtin_memcpy" ) );
98 copy->get_args().push_back( new VariableExpr( dstParam ) );
99 copy->get_args().push_back( new AddressExpr( new VariableExpr( srcParam ) ) );
100 copy->get_args().push_back( new SizeofExpr( unionType ) );
101
102 *out++ = new ExprStmt( noLabels, copy );
103 }
104
105 //E ?=?(E volatile*, int),
106 // ?=?(E _Atomic volatile*, int);
107 void makeEnumFunctions( EnumDecl *enumDecl, EnumInstType *refType, unsigned int functionNesting, std::list< Declaration * > &declsToAdd ) {
108 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
109
110 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), refType ), 0 );
111 assignType->get_parameters().push_back( dstParam );
112
113 // void ?{}(E *); void ^?{}(E *);
114 FunctionType * ctorType = assignType->clone();
115 FunctionType * dtorType = assignType->clone();
116
117 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 );
118 assignType->get_parameters().push_back( srcParam );
119 // void ?{}(E *, E);
120 FunctionType *copyCtorType = assignType->clone();
121
122 // T ?=?(E *, E);
123 ObjectDecl *returnVal = new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 );
124 assignType->get_returnVals().push_back( returnVal );
125
126 // xxx - should we also generate void ?{}(E *, int) and E ?{}(E *, E)?
127 // right now these cases work, but that might change.
128
129 // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
130 // because each unit generates copies of the default routines for each aggregate.
131 // xxx - Temporary: make these functions intrinsic so they codegen as C assignment.
132 // Really they're something of a cross between instrinsic and autogen, so should
133 // probably make a new linkage type
134 FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, assignType, new CompoundStmt( noLabels ), true, false );
135 FunctionDecl *ctorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, ctorType, new CompoundStmt( noLabels ), true, false );
136 FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, copyCtorType, new CompoundStmt( noLabels ), true, false );
137 FunctionDecl *dtorDecl = new FunctionDecl( "^?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, dtorType, new CompoundStmt( noLabels ), true, false );
138 assignDecl->fixUniqueId();
139 ctorDecl->fixUniqueId();
140 copyCtorDecl->fixUniqueId();
141 dtorDecl->fixUniqueId();
142
143 // enum copy construct and assignment is just C-style assignment.
144 // this looks like a bad recursive call, but code gen will turn it into
145 // a C-style assignment.
146 // This happens before function pointer type conversion, so need to do it manually here
147 VariableExpr * assignVarExpr = new VariableExpr( assignDecl );
148 Type *& assignVarExprType = assignVarExpr->get_results().front();
149 assignVarExprType = new PointerType( Type::Qualifiers(), assignVarExprType );
150 ApplicationExpr * assignExpr = new ApplicationExpr( assignVarExpr );
151 assignExpr->get_args().push_back( new VariableExpr( dstParam ) );
152 assignExpr->get_args().push_back( new VariableExpr( srcParam ) );
153
154 // body is either return stmt or expr stmt
155 assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, assignExpr ) );
156 copyCtorDecl->get_statements()->get_kids().push_back( new ExprStmt( noLabels, assignExpr->clone() ) );
157
158 declsToAdd.push_back( assignDecl );
159 declsToAdd.push_back( ctorDecl );
160 declsToAdd.push_back( copyCtorDecl );
161 declsToAdd.push_back( dtorDecl );
162 }
163
164 /// Clones a reference type, replacing any parameters it may have with a clone of the provided list
165 template< typename GenericInstType >
166 GenericInstType *cloneWithParams( GenericInstType *refType, const std::list< Expression* >& params ) {
167 GenericInstType *clone = refType->clone();
168 clone->get_parameters().clear();
169 cloneAll( params, clone->get_parameters() );
170 return clone;
171 }
172
173 /// 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)
174 TypeDecl *cloneAndRename( TypeDecl *src, const std::string &name ) {
175 // TypeDecl *dst = new TypeDecl( name, src->get_storageClass(), 0, src->get_kind() );
176
177 // if ( src->get_kind() == TypeDecl::Any ) {
178 // TypeInstType *opParamType = new TypeInstType( Type::Qualifiers(), name, dst );
179 // FunctionType *opFunctionType = new FunctionType( Type::Qualifiers(), false );
180 // opFunctionType->get_parameters().push_back(
181 // new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), opParamType->clone() ), 0 ) );
182 // FunctionDecl *ctorAssert = new FunctionDecl( "?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false );
183 // FunctionDecl *dtorAssert = new FunctionDecl( "^?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false );
184
185 // opFunctionType->get_parameters().push_back(
186 // new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, opParamType, 0 ) );
187 // FunctionDecl *copyCtorAssert = new FunctionDecl( "?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false );
188
189 // opFunctionType->get_returnVals().push_back(
190 // new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, opParamType->clone(), 0 ) );
191 // FunctionDecl *assignAssert = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType, 0, false, false );
192
193
194 // dst->get_assertions().push_back( assignAssert );
195 // dst->get_assertions().push_back( ctorAssert );
196 // dst->get_assertions().push_back( dtorAssert );
197 // dst->get_assertions().push_back( copyCtorAssert );
198 // }
199
200 TypeDecl *dst = new TypeDecl( src->get_name(), src->get_storageClass(), 0, src->get_kind() );
201 cloneAll(src->get_assertions(), dst->get_assertions());
202 return dst;
203 }
204
205 void makeStructMemberOp( ObjectDecl * dstParam, Expression * src, DeclarationWithType * field, FunctionDecl * func, TypeSubstitution & genericSubs, bool isGeneric, bool forward = true ) {
206 if ( isGeneric ) {
207 // rewrite member type in terms of the type variables on this operator
208 field = field->clone();
209 genericSubs.apply( field );
210
211 if ( src ) {
212 genericSubs.apply( src );
213 }
214 }
215
216 ObjectDecl * returnVal = NULL;
217 if ( ! func->get_functionType()->get_returnVals().empty() ) {
218 returnVal = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_returnVals().front() );
219 }
220
221 // assign to destination (and return value if generic)
222 if ( ArrayType *array = dynamic_cast< ArrayType * >( field->get_type() ) ) {
223 UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) );
224 derefExpr->get_args().push_back( new VariableExpr( dstParam ) );
225 Expression *dstselect = new MemberExpr( field, derefExpr );
226
227 makeArrayFunction( src, dstselect, array, func->get_name(), back_inserter( func->get_statements()->get_kids() ), forward );
228 if ( isGeneric && returnVal ) {
229 UntypedExpr *derefRet = new UntypedExpr( new NameExpr( "*?" ) );
230 derefRet->get_args().push_back( new VariableExpr( returnVal ) );
231 Expression *retselect = new MemberExpr( field, derefRet );
232
233 makeArrayFunction( src, retselect, array, func->get_name(), back_inserter( func->get_statements()->get_kids() ), forward );
234 }
235 } else {
236 makeScalarFunction( src, dstParam, field, func->get_name(), back_inserter( func->get_statements()->get_kids() ) );
237 if ( isGeneric && returnVal ) makeScalarFunction( src, returnVal, field, func->get_name(), back_inserter( func->get_statements()->get_kids() ) );
238 } // if
239 }
240
241 template<typename Iterator>
242 void makeStructFunctionBody( Iterator member, Iterator end, FunctionDecl * func, TypeSubstitution & genericSubs, bool isGeneric, bool forward = true ) {
243 for ( ; member != end; ++member ) {
244 if ( DeclarationWithType *field = dynamic_cast< DeclarationWithType * >( *member ) ) { // otherwise some form of type declaration, e.g. Aggregate
245 // query the type qualifiers of this field and skip assigning it if it is marked const.
246 // If it is an array type, we need to strip off the array layers to find its qualifiers.
247 Type * type = field->get_type();
248 while ( ArrayType * at = dynamic_cast< ArrayType * >( type ) ) {
249 type = at->get_base();
250 }
251
252 if ( type->get_qualifiers().isConst && func->get_name() == "?=?" ) {
253 // don't assign const members, but do construct/destruct
254 continue;
255 }
256
257 if ( field->get_name() == "" ) {
258 // don't assign to anonymous members
259 // xxx - this is a temporary fix. Anonymous members tie into
260 // our inheritance model. I think the correct way to handle this is to
261 // cast the structure to the type of the member and let the resolver
262 // figure out whether it's valid and have a pass afterwards that fixes
263 // the assignment to use pointer arithmetic with the offset of the
264 // member, much like how generic type members are handled.
265 continue;
266 }
267
268 assert( ! func->get_functionType()->get_parameters().empty() );
269 ObjectDecl * dstParam = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_parameters().front() );
270 ObjectDecl * srcParam = NULL;
271 if ( func->get_functionType()->get_parameters().size() == 2 ) {
272 srcParam = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_parameters().back() );
273 }
274 // srcParam may be NULL, in which case we have default ctor/dtor
275 assert( dstParam );
276
277 Expression *srcselect = srcParam ? new MemberExpr( field, new VariableExpr( srcParam ) ) : NULL;
278 makeStructMemberOp( dstParam, srcselect, field, func, genericSubs, isGeneric, forward );
279 } // if
280 } // for
281 } // makeStructFunctionBody
282
283 /// generate the body of a constructor which takes parameters that match fields, e.g.
284 /// void ?{}(A *, int) and void?{}(A *, int, int) for a struct A which has two int fields.
285 template<typename Iterator>
286 void makeStructFieldCtorBody( Iterator member, Iterator end, FunctionDecl * func, TypeSubstitution & genericSubs, bool isGeneric ) {
287 FunctionType * ftype = func->get_functionType();
288 std::list<DeclarationWithType*> & params = ftype->get_parameters();
289 assert( params.size() >= 2 ); // should not call this function for default ctor, etc.
290
291 // skip 'this' parameter
292 ObjectDecl * dstParam = dynamic_cast<ObjectDecl*>( params.front() );
293 assert( dstParam );
294 std::list<DeclarationWithType*>::iterator parameter = params.begin()+1;
295 for ( ; member != end; ++member ) {
296 if ( DeclarationWithType * field = dynamic_cast<DeclarationWithType*>( *member ) ) {
297 if ( isUnnamedBitfield( dynamic_cast< ObjectDecl * > ( field ) ) ) {
298 // don't make a function whose parameter is an unnamed bitfield
299 continue;
300 } else if ( field->get_name() == "" ) {
301 // don't assign to anonymous members
302 // xxx - this is a temporary fix. Anonymous members tie into
303 // our inheritance model. I think the correct way to handle this is to
304 // cast the structure to the type of the member and let the resolver
305 // figure out whether it's valid and have a pass afterwards that fixes
306 // the assignment to use pointer arithmetic with the offset of the
307 // member, much like how generic type members are handled.
308 continue;
309 } else if ( parameter != params.end() ) {
310 // matching parameter, initialize field with copy ctor
311 Expression *srcselect = new VariableExpr(*parameter);
312 makeStructMemberOp( dstParam, srcselect, field, func, genericSubs, isGeneric );
313 ++parameter;
314 } else {
315 // no matching parameter, initialize field with default ctor
316 makeStructMemberOp( dstParam, NULL, field, func, genericSubs, isGeneric );
317 }
318 }
319 }
320 }
321
322 void makeStructFunctions( StructDecl *aggregateDecl, StructInstType *refType, unsigned int functionNesting, std::list< Declaration * > & declsToAdd ) {
323 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
324
325 // Make function polymorphic in same parameters as generic struct, if applicable
326 bool isGeneric = false; // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for union)
327 std::list< TypeDecl* >& genericParams = aggregateDecl->get_parameters();
328 std::list< Expression* > structParams; // List of matching parameters to put on types
329 TypeSubstitution genericSubs; // Substitutions to make to member types of struct
330 for ( std::list< TypeDecl* >::const_iterator param = genericParams.begin(); param != genericParams.end(); ++param ) {
331 isGeneric = true;
332 TypeDecl *typeParam = cloneAndRename( *param, "_autoassign_" + aggregateDecl->get_name() + "_" + (*param)->get_name() );
333 assignType->get_forall().push_back( typeParam );
334 TypeInstType *newParamType = new TypeInstType( Type::Qualifiers(), typeParam->get_name(), typeParam );
335 genericSubs.add( (*param)->get_name(), newParamType );
336 structParams.push_back( new TypeExpr( newParamType ) );
337 }
338
339 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), cloneWithParams( refType, structParams ) ), 0 );
340 assignType->get_parameters().push_back( dstParam );
341
342 // void ?{}(T *); void ^?{}(T *);
343 FunctionType *ctorType = assignType->clone();
344 FunctionType *dtorType = assignType->clone();
345
346 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, structParams ), 0 );
347 assignType->get_parameters().push_back( srcParam );
348
349 // void ?{}(T *, T);
350 FunctionType *copyCtorType = assignType->clone();
351
352 // T ?=?(T *, T);
353 ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, structParams ), 0 );
354 assignType->get_returnVals().push_back( returnVal );
355
356 // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
357 // because each unit generates copies of the default routines for each aggregate.
358 FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false );
359 FunctionDecl *ctorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, ctorType, new CompoundStmt( noLabels ), true, false );
360 FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, copyCtorType, new CompoundStmt( noLabels ), true, false );
361 FunctionDecl *dtorDecl = new FunctionDecl( "^?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, dtorType, new CompoundStmt( noLabels ), true, false );
362 assignDecl->fixUniqueId();
363 ctorDecl->fixUniqueId();
364 copyCtorDecl->fixUniqueId();
365 dtorDecl->fixUniqueId();
366
367 // create constructors which take each member type as a parameter.
368 // for example, for struct A { int x, y; }; generate
369 // void ?{}(A *, int) and void ?{}(A *, int, int)
370 std::list<Declaration *> memCtors;
371 FunctionType * memCtorType = ctorType->clone();
372 for ( std::list<Declaration *>::iterator i = aggregateDecl->get_members().begin(); i != aggregateDecl->get_members().end(); ++i ) {
373 DeclarationWithType * member = dynamic_cast<DeclarationWithType *>( *i );
374 assert( member );
375 if ( isUnnamedBitfield( dynamic_cast< ObjectDecl * > ( member ) ) ) {
376 // don't make a function whose parameter is an unnamed bitfield
377 continue;
378 } else if ( member->get_name() == "" ) {
379 // don't assign to anonymous members
380 // xxx - this is a temporary fix. Anonymous members tie into
381 // our inheritance model. I think the correct way to handle this is to
382 // cast the structure to the type of the member and let the resolver
383 // figure out whether it's valid and have a pass afterwards that fixes
384 // the assignment to use pointer arithmetic with the offset of the
385 // member, much like how generic type members are handled.
386 continue;
387 }
388 memCtorType->get_parameters().push_back( new ObjectDecl( member->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, member->get_type()->clone(), 0 ) );
389 FunctionDecl * ctor = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, memCtorType->clone(), new CompoundStmt( noLabels ), true, false );
390 ctor->fixUniqueId();
391 makeStructFieldCtorBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), ctor, genericSubs, isGeneric );
392 memCtors.push_back( ctor );
393 }
394 delete memCtorType;
395
396 // generate appropriate calls to member ctor, assignment
397 makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), assignDecl, genericSubs, isGeneric );
398 makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), ctorDecl, genericSubs, isGeneric );
399 makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), copyCtorDecl, genericSubs, isGeneric );
400 // needs to do everything in reverse, so pass "forward" as false
401 makeStructFunctionBody( aggregateDecl->get_members().rbegin(), aggregateDecl->get_members().rend(), dtorDecl, genericSubs, isGeneric, false );
402
403 if ( ! isGeneric ) assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
404
405 declsToAdd.push_back( assignDecl );
406 declsToAdd.push_back( ctorDecl );
407 declsToAdd.push_back( copyCtorDecl );
408 declsToAdd.push_back( dtorDecl );
409 declsToAdd.splice( declsToAdd.end(), memCtors );
410 }
411
412 void makeUnionFunctions( UnionDecl *aggregateDecl, UnionInstType *refType, unsigned int functionNesting, std::list< Declaration * > & declsToAdd ) {
413 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
414
415 // Make function polymorphic in same parameters as generic union, if applicable
416 bool isGeneric = false; // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for struct)
417 std::list< TypeDecl* >& genericParams = aggregateDecl->get_parameters();
418 std::list< Expression* > unionParams; // List of matching parameters to put on types
419 for ( std::list< TypeDecl* >::const_iterator param = genericParams.begin(); param != genericParams.end(); ++param ) {
420 isGeneric = true;
421 TypeDecl *typeParam = cloneAndRename( *param, "_autoassign_" + aggregateDecl->get_name() + "_" + (*param)->get_name() );
422 assignType->get_forall().push_back( typeParam );
423 unionParams.push_back( new TypeExpr( new TypeInstType( Type::Qualifiers(), typeParam->get_name(), typeParam ) ) );
424 }
425
426 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), cloneWithParams( refType, unionParams ) ), 0 );
427 assignType->get_parameters().push_back( dstParam );
428
429 // default ctor/dtor need only first parameter
430 FunctionType * ctorType = assignType->clone();
431 FunctionType * dtorType = assignType->clone();
432
433 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, unionParams ), 0 );
434 assignType->get_parameters().push_back( srcParam );
435
436 // copy ctor needs both parameters
437 FunctionType * copyCtorType = assignType->clone();
438
439 // assignment needs both and return value
440 ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, unionParams ), 0 );
441 assignType->get_returnVals().push_back( returnVal );
442
443 // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
444 // because each unit generates copies of the default routines for each aggregate.
445 FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false );
446 FunctionDecl *ctorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, ctorType, new CompoundStmt( noLabels ), true, false );
447 FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, copyCtorType, NULL, true, false );
448 FunctionDecl *dtorDecl = new FunctionDecl( "^?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, dtorType, new CompoundStmt( noLabels ), true, false );
449
450 assignDecl->fixUniqueId();
451 ctorDecl->fixUniqueId();
452 copyCtorDecl->fixUniqueId();
453 dtorDecl->fixUniqueId();
454
455 makeUnionFieldsAssignment( srcParam, dstParam, cloneWithParams( refType, unionParams ), back_inserter( assignDecl->get_statements()->get_kids() ) );
456 if ( isGeneric ) makeUnionFieldsAssignment( srcParam, returnVal, cloneWithParams( refType, unionParams ), back_inserter( assignDecl->get_statements()->get_kids() ) );
457
458 if ( ! isGeneric ) assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
459
460 // body of assignment and copy ctor is the same
461 copyCtorDecl->set_statements( assignDecl->get_statements()->clone() );
462
463 declsToAdd.push_back( assignDecl );
464 declsToAdd.push_back( ctorDecl );
465 declsToAdd.push_back( copyCtorDecl );
466 declsToAdd.push_back( dtorDecl );
467 }
468
469 void AutogenerateRoutines::visit( EnumDecl *enumDecl ) {
470 if ( ! enumDecl->get_members().empty() ) {
471 EnumInstType *enumInst = new EnumInstType( Type::Qualifiers(), enumDecl->get_name() );
472 // enumInst->set_baseEnum( enumDecl );
473 // declsToAdd.push_back(
474 makeEnumFunctions( enumDecl, enumInst, functionNesting, declsToAdd );
475 }
476 }
477
478 void AutogenerateRoutines::visit( StructDecl *structDecl ) {
479 if ( ! structDecl->get_members().empty() && structsDone.find( structDecl->get_name() ) == structsDone.end() ) {
480 StructInstType structInst( Type::Qualifiers(), structDecl->get_name() );
481 structInst.set_baseStruct( structDecl );
482 makeStructFunctions( structDecl, &structInst, functionNesting, declsToAdd );
483 structsDone.insert( structDecl->get_name() );
484 } // if
485 }
486
487 void AutogenerateRoutines::visit( UnionDecl *unionDecl ) {
488 if ( ! unionDecl->get_members().empty() ) {
489 UnionInstType unionInst( Type::Qualifiers(), unionDecl->get_name() );
490 unionInst.set_baseUnion( unionDecl );
491 makeUnionFunctions( unionDecl, &unionInst, functionNesting, declsToAdd );
492 } // if
493 }
494
495 void AutogenerateRoutines::visit( TypeDecl *typeDecl ) {
496 CompoundStmt *stmts = 0;
497 TypeInstType *typeInst = new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), false );
498 typeInst->set_baseType( typeDecl );
499 ObjectDecl *src = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst->clone(), 0 );
500 ObjectDecl *dst = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), typeInst->clone() ), 0 );
501 if ( typeDecl->get_base() ) {
502 // xxx - generate ctor/dtors for typedecls, e.g.
503 // otype T = int *;
504 stmts = new CompoundStmt( std::list< Label >() );
505 UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );
506 assign->get_args().push_back( new CastExpr( new VariableExpr( dst ), new PointerType( Type::Qualifiers(), typeDecl->get_base()->clone() ) ) );
507 assign->get_args().push_back( new CastExpr( new VariableExpr( src ), typeDecl->get_base()->clone() ) );
508 stmts->get_kids().push_back( new ReturnStmt( std::list< Label >(), assign ) );
509 } // if
510 FunctionType *type = new FunctionType( Type::Qualifiers(), false );
511 type->get_returnVals().push_back( new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst, 0 ) );
512 type->get_parameters().push_back( dst );
513 type->get_parameters().push_back( src );
514 FunctionDecl *func = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::AutoGen, type, stmts, true, false );
515 declsToAdd.push_back( func );
516 }
517
518 void addDecls( std::list< Declaration * > &declsToAdd, std::list< Statement * > &statements, std::list< Statement * >::iterator i ) {
519 for ( std::list< Declaration * >::iterator decl = declsToAdd.begin(); decl != declsToAdd.end(); ++decl ) {
520 statements.insert( i, new DeclStmt( noLabels, *decl ) );
521 } // for
522 declsToAdd.clear();
523 }
524
525 void AutogenerateRoutines::visit( FunctionType *) {
526 // ensure that we don't add assignment ops for types defined as part of the function
527 }
528
529 void AutogenerateRoutines::visit( PointerType *) {
530 // ensure that we don't add assignment ops for types defined as part of the pointer
531 }
532
533 void AutogenerateRoutines::visit( TraitDecl *) {
534 // ensure that we don't add assignment ops for types defined as part of the trait
535 }
536
537 template< typename StmtClass >
538 inline void AutogenerateRoutines::visitStatement( StmtClass *stmt ) {
539 std::set< std::string > oldStructs = structsDone;
540 addVisit( stmt, *this );
541 structsDone = oldStructs;
542 }
543
544 void AutogenerateRoutines::visit( FunctionDecl *functionDecl ) {
545 maybeAccept( functionDecl->get_functionType(), *this );
546 acceptAll( functionDecl->get_oldDecls(), *this );
547 functionNesting += 1;
548 maybeAccept( functionDecl->get_statements(), *this );
549 functionNesting -= 1;
550 }
551
552 void AutogenerateRoutines::visit( CompoundStmt *compoundStmt ) {
553 visitStatement( compoundStmt );
554 }
555
556 void AutogenerateRoutines::visit( SwitchStmt *switchStmt ) {
557 visitStatement( switchStmt );
558 }
559} // SymTab
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