source: src/InitTweak/InitTweak.cc@ ea91c42

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 ea91c42 was 579263a, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Merge branch 'master' into designations

Conflicts:

src/InitTweak/FixInit.cc
src/SymTab/Autogen.h
src/SynTree/Initializer.cc
src/SynTree/Initializer.h
src/Tuples/TupleExpansion.cc
  • Property mode set to 100644
File size: 21.7 KB
RevLine 
[4d2434a]1#include <algorithm>
[2b46a13]2#include "InitTweak.h"
3#include "SynTree/Visitor.h"
4#include "SynTree/Statement.h"
5#include "SynTree/Initializer.h"
6#include "SynTree/Expression.h"
[f9cebb5]7#include "SynTree/Attribute.h"
[2b46a13]8#include "GenPoly/GenPoly.h"
[4d4882a]9#include "ResolvExpr/typeops.h"
[2b46a13]10
11namespace InitTweak {
[64071c2]12 namespace {
13 class HasDesignations : public Visitor {
14 public:
15 bool hasDesignations = false;
[e4d829b]16 virtual void visit( Designation * des ) {
17 if ( ! des->get_designators().empty() ) hasDesignations = true;
18 else Visitor::visit( des );
[64071c2]19 }
20 };
[2b46a13]21
[dcd73d1]22 class InitDepthChecker : public Visitor {
23 public:
24 bool depthOkay = true;
25 Type * type;
26 int curDepth = 0, maxDepth = 0;
27 InitDepthChecker( Type * type ) : type( type ) {
28 Type * t = type;
29 while ( ArrayType * at = dynamic_cast< ArrayType * >( t ) ) {
30 maxDepth++;
31 t = at->get_base();
32 }
33 maxDepth++;
34 }
35 virtual void visit( ListInit * listInit ) {
36 curDepth++;
37 if ( curDepth > maxDepth ) depthOkay = false;
38 Visitor::visit( listInit );
39 curDepth--;
40 }
41 };
42
[4d2434a]43 class InitFlattener : public Visitor {
[64071c2]44 public:
45 virtual void visit( SingleInit * singleInit );
46 virtual void visit( ListInit * listInit );
47 std::list< Expression * > argList;
48 };
[2b46a13]49
[4d2434a]50 void InitFlattener::visit( SingleInit * singleInit ) {
[64071c2]51 argList.push_back( singleInit->get_value()->clone() );
52 }
[2b46a13]53
[4d2434a]54 void InitFlattener::visit( ListInit * listInit ) {
55 // flatten nested list inits
56 std::list<Initializer*>::iterator it = listInit->begin();
57 for ( ; it != listInit->end(); ++it ) {
[64071c2]58 (*it)->accept( *this );
59 }
60 }
61 }
[2b46a13]62
[64071c2]63 std::list< Expression * > makeInitList( Initializer * init ) {
[4d2434a]64 InitFlattener flattener;
65 maybeAccept( init, flattener );
66 return flattener.argList;
[64071c2]67 }
[2b46a13]68
[64071c2]69 bool isDesignated( Initializer * init ) {
70 HasDesignations finder;
71 maybeAccept( init, finder );
72 return finder.hasDesignations;
[dcd73d1]73 }
74
75 bool checkInitDepth( ObjectDecl * objDecl ) {
76 InitDepthChecker checker( objDecl->get_type() );
77 maybeAccept( objDecl->get_init(), checker );
78 return checker.depthOkay;
[64071c2]79 }
[2b46a13]80
[39f84a4]81 class InitExpander::ExpanderImpl {
82 public:
83 virtual std::list< Expression * > next( std::list< Expression * > & indices ) = 0;
[4d2434a]84 virtual Statement * buildListInit( UntypedExpr * callExpr, std::list< Expression * > & indices ) = 0;
[39f84a4]85 };
86
87 class InitImpl : public InitExpander::ExpanderImpl {
88 public:
[4d2434a]89 InitImpl( Initializer * init ) : init( init ) {}
[39f84a4]90
[7e003011]91 virtual std::list< Expression * > next( __attribute((unused)) std::list< Expression * > & indices ) {
[39f84a4]92 // this is wrong, but just a placeholder for now
[4d2434a]93 // if ( ! flattened ) flatten( indices );
94 // return ! inits.empty() ? makeInitList( inits.front() ) : std::list< Expression * >();
95 return makeInitList( init );
[39f84a4]96 }
[4d2434a]97
98 virtual Statement * buildListInit( UntypedExpr * callExpr, std::list< Expression * > & indices );
[39f84a4]99 private:
[4d2434a]100 Initializer * init;
[39f84a4]101 };
102
103 class ExprImpl : public InitExpander::ExpanderImpl {
104 public:
105 ExprImpl( Expression * expr ) : arg( expr ) {}
106
[9b4c936]107 ~ExprImpl() { delete arg; }
108
[39f84a4]109 virtual std::list< Expression * > next( std::list< Expression * > & indices ) {
110 std::list< Expression * > ret;
111 Expression * expr = maybeClone( arg );
112 if ( expr ) {
113 for ( std::list< Expression * >::reverse_iterator it = indices.rbegin(); it != indices.rend(); ++it ) {
114 // go through indices and layer on subscript exprs ?[?]
115 ++it;
116 UntypedExpr * subscriptExpr = new UntypedExpr( new NameExpr( "?[?]") );
117 subscriptExpr->get_args().push_back( expr );
118 subscriptExpr->get_args().push_back( (*it)->clone() );
119 expr = subscriptExpr;
120 }
121 ret.push_back( expr );
122 }
123 return ret;
124 }
[4d2434a]125
126 virtual Statement * buildListInit( UntypedExpr * callExpr, std::list< Expression * > & indices );
[39f84a4]127 private:
128 Expression * arg;
129 };
130
131 InitExpander::InitExpander( Initializer * init ) : expander( new InitImpl( init ) ) {}
132
133 InitExpander::InitExpander( Expression * expr ) : expander( new ExprImpl( expr ) ) {}
134
135 std::list< Expression * > InitExpander::operator*() {
136 return cur;
137 }
138
139 InitExpander & InitExpander::operator++() {
140 cur = expander->next( indices );
141 return *this;
142 }
143
144 // use array indices list to build switch statement
145 void InitExpander::addArrayIndex( Expression * index, Expression * dimension ) {
146 indices.push_back( index );
147 indices.push_back( dimension );
148 }
149
[4d2434a]150 void InitExpander::clearArrayIndices() {
[9b4c936]151 deleteAll( indices );
[4d2434a]152 indices.clear();
153 }
154
155 namespace {
[f9cebb5]156 /// given index i, dimension d, initializer init, and callExpr f, generates
157 /// if (i < d) f(..., init)
158 /// ++i;
159 /// so that only elements within the range of the array are constructed
[4d2434a]160 template< typename OutIterator >
[f9cebb5]161 void buildCallExpr( UntypedExpr * callExpr, Expression * index, Expression * dimension, Initializer * init, OutIterator out ) {
[4d2434a]162 UntypedExpr * cond = new UntypedExpr( new NameExpr( "?<?") );
163 cond->get_args().push_back( index->clone() );
164 cond->get_args().push_back( dimension->clone() );
165
166 std::list< Expression * > args = makeInitList( init );
167 callExpr->get_args().splice( callExpr->get_args().end(), args );
168
169 *out++ = new IfStmt( noLabels, cond, new ExprStmt( noLabels, callExpr ), NULL );
170
171 UntypedExpr * increment = new UntypedExpr( new NameExpr( "++?" ) );
172 increment->get_args().push_back( new AddressExpr( index->clone() ) );
173 *out++ = new ExprStmt( noLabels, increment );
174 }
175
176 template< typename OutIterator >
177 void build( UntypedExpr * callExpr, InitExpander::IndexList::iterator idx, InitExpander::IndexList::iterator idxEnd, Initializer * init, OutIterator out ) {
178 if ( idx == idxEnd ) return;
179 Expression * index = *idx++;
180 assert( idx != idxEnd );
181 Expression * dimension = *idx++;
182
[f9cebb5]183 // xxx - may want to eventually issue a warning here if we can detect
184 // that the number of elements exceeds to dimension of the array
[4d2434a]185 if ( idx == idxEnd ) {
186 if ( ListInit * listInit = dynamic_cast< ListInit * >( init ) ) {
187 for ( Initializer * init : *listInit ) {
[f9cebb5]188 buildCallExpr( callExpr->clone(), index, dimension, init, out );
[4d2434a]189 }
190 } else {
[f9cebb5]191 buildCallExpr( callExpr->clone(), index, dimension, init, out );
[4d2434a]192 }
193 } else {
194 std::list< Statement * > branches;
195
196 unsigned long cond = 0;
197 ListInit * listInit = dynamic_cast< ListInit * >( init );
198 if ( ! listInit ) {
199 // xxx - this shouldn't be an error, but need a way to
200 // terminate without creating output, so should catch this error
201 throw SemanticError( "unbalanced list initializers" );
202 }
[f9cebb5]203
204 static UniqueName targetLabel( "L__autogen__" );
205 Label switchLabel( targetLabel.newName(), 0, std::list< Attribute * >{ new Attribute("unused") } );
[4d2434a]206 for ( Initializer * init : *listInit ) {
207 Expression * condition;
208 // check for designations
209 // if ( init-> ) {
210 condition = new ConstantExpr( Constant::from_ulong( cond ) );
211 ++cond;
212 // } else {
213 // condition = // ... take designation
214 // cond = // ... take designation+1
215 // }
216 std::list< Statement * > stmts;
217 build( callExpr, idx, idxEnd, init, back_inserter( stmts ) );
[f9cebb5]218 stmts.push_back( new BranchStmt( noLabels, switchLabel, BranchStmt::Break ) );
[4d2434a]219 CaseStmt * caseStmt = new CaseStmt( noLabels, condition, stmts );
220 branches.push_back( caseStmt );
221 }
222 *out++ = new SwitchStmt( noLabels, index->clone(), branches );
[f9cebb5]223 *out++ = new NullStmt( std::list<Label>{ switchLabel } );
[4d2434a]224 }
225 }
226 }
227
228 // if array came with an initializer list: initialize each element
229 // may have more initializers than elements in the array - need to check at each index that
230 // we haven't exceeded size.
231 // may have fewer initializers than elements in the array - need to default construct
232 // remaining elements.
233 // To accomplish this, generate switch statement, consuming all of expander's elements
234 Statement * InitImpl::buildListInit( UntypedExpr * dst, std::list< Expression * > & indices ) {
235 if ( ! init ) return NULL;
[f9cebb5]236 CompoundStmt * block = new CompoundStmt( noLabels );
237 build( dst, indices.begin(), indices.end(), init, back_inserter( block->get_kids() ) );
238 if ( block->get_kids().empty() ) {
239 delete block;
[4d2434a]240 return NULL;
241 } else {
242 init = NULL; // init was consumed in creating the list init
[f9cebb5]243 return block;
[4d2434a]244 }
[39f84a4]245 }
246
[7e003011]247 Statement * ExprImpl::buildListInit( __attribute((unused)) UntypedExpr * dst, __attribute((unused)) std::list< Expression * > & indices ) {
[4d2434a]248 return NULL;
249 }
250
251 Statement * InitExpander::buildListInit( UntypedExpr * dst ) {
252 return expander->buildListInit( dst, indices );
253 }
254
[64071c2]255 bool tryConstruct( ObjectDecl * objDecl ) {
256 return ! LinkageSpec::isBuiltin( objDecl->get_linkage() ) &&
257 (objDecl->get_init() == NULL ||
[1ba88a0]258 ( objDecl->get_init() != NULL && objDecl->get_init()->get_maybeConstructed() ))
[08d5507b]259 && ! objDecl->get_storageClasses().is_extern;
[64071c2]260 }
[2b46a13]261
[4d2434a]262 class CallFinder : public Visitor {
263 public:
264 typedef Visitor Parent;
265 CallFinder( const std::list< std::string > & names ) : names( names ) {}
266
267 virtual void visit( ApplicationExpr * appExpr ) {
268 handleCallExpr( appExpr );
269 }
270
271 virtual void visit( UntypedExpr * untypedExpr ) {
272 handleCallExpr( untypedExpr );
273 }
274
275 std::list< Expression * > * matches;
276 private:
277 const std::list< std::string > names;
278
279 template< typename CallExpr >
280 void handleCallExpr( CallExpr * expr ) {
281 Parent::visit( expr );
282 std::string fname = getFunctionName( expr );
283 if ( std::find( names.begin(), names.end(), fname ) != names.end() ) {
284 matches->push_back( expr );
[cad355a]285 }
[64071c2]286 }
[4d2434a]287 };
288
289 void collectCtorDtorCalls( Statement * stmt, std::list< Expression * > & matches ) {
290 static CallFinder finder( std::list< std::string >{ "?{}", "^?{}" } );
291 finder.matches = &matches;
292 maybeAccept( stmt, finder );
[64071c2]293 }
[4d2434a]294
295 Expression * getCtorDtorCall( Statement * stmt ) {
296 std::list< Expression * > matches;
297 collectCtorDtorCalls( stmt, matches );
298 assert( matches.size() <= 1 );
299 return matches.size() == 1 ? matches.front() : NULL;
300 }
301
[aedfd91]302 namespace {
[599b386]303 DeclarationWithType * getCalledFunction( Expression * expr );
304
305 template<typename CallExpr>
306 DeclarationWithType * handleDerefCalledFunction( CallExpr * expr ) {
307 // (*f)(x) => should get "f"
308 std::string name = getFunctionName( expr );
309 assertf( name == "*?", "Unexpected untyped expression: %s", name.c_str() );
310 assertf( ! expr->get_args().empty(), "Can't get called function from dereference with no arguments" );
311 return getCalledFunction( expr->get_args().front() );
312 }
313
[ee1635c8]314 DeclarationWithType * getCalledFunction( Expression * expr ) {
315 assert( expr );
316 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( expr ) ) {
317 return varExpr->get_var();
318 } else if ( MemberExpr * memberExpr = dynamic_cast< MemberExpr * >( expr ) ) {
319 return memberExpr->get_member();
320 } else if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( expr ) ) {
321 return getCalledFunction( castExpr->get_arg() );
[599b386]322 } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * >( expr ) ) {
323 return handleDerefCalledFunction( untypedExpr );
324 } else if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * > ( expr ) ) {
325 return handleDerefCalledFunction( appExpr );
[f3b0a07]326 } else if ( AddressExpr * addrExpr = dynamic_cast< AddressExpr * >( expr ) ) {
327 return getCalledFunction( addrExpr->get_arg() );
[ee1635c8]328 }
329 return nullptr;
[aedfd91]330 }
331 }
[70f89d00]332
[b7b8674]333 DeclarationWithType * getFunction( Expression * expr ) {
334 if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr ) ) {
335 return getCalledFunction( appExpr->get_function() );
336 } else if ( UntypedExpr * untyped = dynamic_cast< UntypedExpr * > ( expr ) ) {
337 return getCalledFunction( untyped->get_function() );
338 }
339 assertf( false, "getFunction received unknown expression: %s", toString( expr ).c_str() );
340 }
341
[aedfd91]342 ApplicationExpr * isIntrinsicCallExpr( Expression * expr ) {
343 ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr );
344 if ( ! appExpr ) return NULL;
[ee1635c8]345 DeclarationWithType * function = getCalledFunction( appExpr->get_function() );
[f3b0a07]346 assertf( function, "getCalledFunction returned nullptr: %s", toString( appExpr->get_function() ).c_str() );
[64071c2]347 // check for Intrinsic only - don't want to remove all overridable ctor/dtors because autogenerated ctor/dtor
348 // will call all member dtors, and some members may have a user defined dtor.
[ee1635c8]349 return function->get_linkage() == LinkageSpec::Intrinsic ? appExpr : NULL;
[aedfd91]350 }
351
[a465caff]352 namespace {
353 template <typename Predicate>
354 bool allofCtorDtor( Statement * stmt, const Predicate & pred ) {
355 std::list< Expression * > callExprs;
356 collectCtorDtorCalls( stmt, callExprs );
357 // if ( callExprs.empty() ) return false; // xxx - do I still need this check?
358 return std::all_of( callExprs.begin(), callExprs.end(), pred);
359 }
360 }
361
[f9cebb5]362 bool isIntrinsicSingleArgCallStmt( Statement * stmt ) {
[a465caff]363 return allofCtorDtor( stmt, []( Expression * callExpr ){
[4d2434a]364 if ( ApplicationExpr * appExpr = isIntrinsicCallExpr( callExpr ) ) {
[906e24d]365 FunctionType *funcType = GenPoly::getFunctionType( appExpr->get_function()->get_result() );
[4d2434a]366 assert( funcType );
367 return funcType->get_parameters().size() == 1;
368 }
369 return false;
370 });
[64071c2]371 }
[f1b1e4c]372
[a465caff]373 bool isIntrinsicCallStmt( Statement * stmt ) {
374 return allofCtorDtor( stmt, []( Expression * callExpr ) {
375 return isIntrinsicCallExpr( callExpr );
376 });
377 }
378
[64071c2]379 namespace {
380 template<typename CallExpr>
381 Expression *& callArg( CallExpr * callExpr, unsigned int pos ) {
[d1969a6]382 if ( pos >= callExpr->get_args().size() ) assertf( false, "asking for argument that doesn't exist. Return NULL/throw exception?" );
[64071c2]383 for ( Expression *& arg : callExpr->get_args() ) {
384 if ( pos == 0 ) return arg;
385 pos--;
386 }
387 assert( false );
388 }
389 }
[f1b1e4c]390
[64071c2]391 Expression *& getCallArg( Expression * callExpr, unsigned int pos ) {
392 if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( callExpr ) ) {
393 return callArg( appExpr, pos );
394 } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * >( callExpr ) ) {
395 return callArg( untypedExpr, pos );
[f3b0a07]396 } else if ( TupleAssignExpr * tupleExpr = dynamic_cast< TupleAssignExpr * > ( callExpr ) ) {
397 std::list< Statement * > & stmts = tupleExpr->get_stmtExpr()->get_statements()->get_kids();
398 assertf( ! stmts.empty(), "TupleAssignExpr somehow has no statements." );
399 ExprStmt * stmt = safe_dynamic_cast< ExprStmt * >( stmts.back() );
400 TupleExpr * tuple = safe_dynamic_cast< TupleExpr * >( stmt->get_expr() );
401 assertf( ! tuple->get_exprs().empty(), "TupleAssignExpr somehow has empty tuple expr." );
402 return getCallArg( tuple->get_exprs().front(), pos );
[64071c2]403 } else {
[f3b0a07]404 assertf( false, "Unexpected expression type passed to getCallArg: %s", toString( callExpr ).c_str() );
[64071c2]405 }
406 }
[f1b1e4c]407
[64071c2]408 namespace {
[599b386]409 std::string funcName( Expression * func );
410
411 template<typename CallExpr>
412 std::string handleDerefName( CallExpr * expr ) {
413 // (*f)(x) => should get name "f"
414 std::string name = getFunctionName( expr );
415 assertf( name == "*?", "Unexpected untyped expression: %s", name.c_str() );
416 assertf( ! expr->get_args().empty(), "Can't get function name from dereference with no arguments" );
417 return funcName( expr->get_args().front() );
418 }
419
[c738ca4]420 std::string funcName( Expression * func ) {
[64071c2]421 if ( NameExpr * nameExpr = dynamic_cast< NameExpr * >( func ) ) {
422 return nameExpr->get_name();
423 } else if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( func ) ) {
424 return varExpr->get_var()->get_name();
[c738ca4]425 } else if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( func ) ) {
426 return funcName( castExpr->get_arg() );
[ee1635c8]427 } else if ( MemberExpr * memberExpr = dynamic_cast< MemberExpr * >( func ) ) {
428 return memberExpr->get_member()->get_name();
[96a10cdd]429 } else if ( UntypedMemberExpr * memberExpr = dynamic_cast< UntypedMemberExpr * > ( func ) ) {
[fd782b2]430 return funcName( memberExpr->get_member() );
[599b386]431 } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * >( func ) ) {
432 return handleDerefName( untypedExpr );
433 } else if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( func ) ) {
434 return handleDerefName( appExpr );
[64071c2]435 } else {
[d1969a6]436 assertf( false, "Unexpected expression type being called as a function in call expression" );
[64071c2]437 }
438 }
439 }
[70f89d00]440
[64071c2]441 std::string getFunctionName( Expression * expr ) {
[599b386]442 // there's some unforunate overlap here with getCalledFunction. Ideally this would be able to use getCalledFunction and
443 // return the name of the DeclarationWithType, but this needs to work for NameExpr and UntypedMemberExpr, where getCalledFunction
444 // can't possibly do anything reasonable.
[64071c2]445 if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr ) ) {
[c738ca4]446 return funcName( appExpr->get_function() );
[64071c2]447 } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * > ( expr ) ) {
[c738ca4]448 return funcName( untypedExpr->get_function() );
[64071c2]449 } else {
[c738ca4]450 std::cerr << expr << std::endl;
[d1969a6]451 assertf( false, "Unexpected expression type passed to getFunctionName" );
[64071c2]452 }
453 }
[10a7775]454
[64071c2]455 Type * getPointerBase( Type * type ) {
456 if ( PointerType * ptrType = dynamic_cast< PointerType * >( type ) ) {
457 return ptrType->get_base();
458 } else if ( ArrayType * arrayType = dynamic_cast< ArrayType * >( type ) ) {
459 return arrayType->get_base();
460 } else {
461 return NULL;
462 }
463 }
[10a7775]464
[64071c2]465 Type * isPointerType( Type * type ) {
466 if ( getPointerBase( type ) ) return type;
467 else return NULL;
468 }
[40e636a]469
470 class ConstExprChecker : public Visitor {
471 public:
472 ConstExprChecker() : isConstExpr( true ) {}
473
[65dc863]474 using Visitor::visit;
475
[7e003011]476 virtual void visit( __attribute((unused)) ApplicationExpr *applicationExpr ) { isConstExpr = false; }
477 virtual void visit( __attribute((unused)) UntypedExpr *untypedExpr ) { isConstExpr = false; }
[1ba88a0]478 virtual void visit( NameExpr *nameExpr ) {
479 // xxx - temporary hack, because 0 and 1 really should be constexprs, even though they technically aren't in Cforall today
480 if ( nameExpr->get_name() != "0" && nameExpr->get_name() != "1" ) isConstExpr = false;
481 }
482 // virtual void visit( CastExpr *castExpr ) { isConstExpr = false; }
483 virtual void visit( AddressExpr *addressExpr ) {
484 // address of a variable or member expression is constexpr
485 Expression * arg = addressExpr->get_arg();
486 if ( ! dynamic_cast< NameExpr * >( arg) && ! dynamic_cast< VariableExpr * >( arg ) && ! dynamic_cast< MemberExpr * >( arg ) && ! dynamic_cast< UntypedMemberExpr * >( arg ) ) isConstExpr = false;
487 }
[7e003011]488 virtual void visit( __attribute((unused)) LabelAddressExpr *labAddressExpr ) { isConstExpr = false; }
489 virtual void visit( __attribute((unused)) UntypedMemberExpr *memberExpr ) { isConstExpr = false; }
490 virtual void visit( __attribute((unused)) MemberExpr *memberExpr ) { isConstExpr = false; }
491 virtual void visit( __attribute((unused)) VariableExpr *variableExpr ) { isConstExpr = false; }
[40e636a]492 // these might be okay?
493 // virtual void visit( SizeofExpr *sizeofExpr );
494 // virtual void visit( AlignofExpr *alignofExpr );
495 // virtual void visit( UntypedOffsetofExpr *offsetofExpr );
496 // virtual void visit( OffsetofExpr *offsetofExpr );
497 // virtual void visit( OffsetPackExpr *offsetPackExpr );
498 // virtual void visit( AttrExpr *attrExpr );
499 // virtual void visit( CommaExpr *commaExpr );
500 // virtual void visit( LogicalExpr *logicalExpr );
501 // virtual void visit( ConditionalExpr *conditionalExpr );
[7e003011]502 virtual void visit( __attribute((unused)) TypeExpr *typeExpr ) { isConstExpr = false; }
503 virtual void visit( __attribute((unused)) AsmExpr *asmExpr ) { isConstExpr = false; }
504 virtual void visit( __attribute((unused)) UntypedValofExpr *valofExpr ) { isConstExpr = false; }
505 virtual void visit( __attribute((unused)) CompoundLiteralExpr *compLitExpr ) { isConstExpr = false; }
506 virtual void visit( __attribute((unused)) UntypedTupleExpr *tupleExpr ) { isConstExpr = false; }
507 virtual void visit( __attribute((unused)) TupleExpr *tupleExpr ) { isConstExpr = false; }
508 virtual void visit( __attribute((unused)) TupleAssignExpr *tupleExpr ) { isConstExpr = false; }
[40e636a]509
510 bool isConstExpr;
511 };
512
513 bool isConstExpr( Expression * expr ) {
514 if ( expr ) {
515 ConstExprChecker checker;
516 expr->accept( checker );
517 return checker.isConstExpr;
518 }
519 return true;
520 }
521
522 bool isConstExpr( Initializer * init ) {
523 if ( init ) {
524 ConstExprChecker checker;
525 init->accept( checker );
526 return checker.isConstExpr;
527 } // if
528 // for all intents and purposes, no initializer means const expr
529 return true;
530 }
531
[79970ed]532 bool isConstructor( const std::string & str ) { return str == "?{}"; }
533 bool isDestructor( const std::string & str ) { return str == "^?{}"; }
[ee1635c8]534 bool isAssignment( const std::string & str ) { return str == "?=?"; }
[79970ed]535 bool isCtorDtor( const std::string & str ) { return isConstructor( str ) || isDestructor( str ); }
[ee1635c8]536 bool isCtorDtorAssign( const std::string & str ) { return isCtorDtor( str ) || isAssignment( str ); }
[4d4882a]537
[ee1635c8]538 FunctionDecl * isCopyFunction( Declaration * decl, const std::string & fname ) {
[4d4882a]539 FunctionDecl * function = dynamic_cast< FunctionDecl * >( decl );
540 if ( ! function ) return 0;
[ee1635c8]541 if ( function->get_name() != fname ) return 0;
[4d4882a]542 FunctionType * ftype = function->get_functionType();
543 if ( ftype->get_parameters().size() != 2 ) return 0;
544
545 Type * t1 = ftype->get_parameters().front()->get_type();
546 Type * t2 = ftype->get_parameters().back()->get_type();
547 PointerType * ptrType = dynamic_cast< PointerType * > ( t1 );
548 assert( ptrType );
549
[ee1635c8]550 if ( ResolvExpr::typesCompatibleIgnoreQualifiers( ptrType->get_base(), t2, SymTab::Indexer() ) ) {
[4d4882a]551 return function;
552 } else {
[ee1635c8]553 return nullptr;
[4d4882a]554 }
555 }
[ee1635c8]556
[207c7e1d]557 FunctionDecl * isAssignment( Declaration * decl ) {
558 return isCopyFunction( decl, "?=?" );
559 }
560 FunctionDecl * isDestructor( Declaration * decl ) {
561 if ( isDestructor( decl->get_name() ) ) {
562 return dynamic_cast< FunctionDecl * >( decl );
563 }
564 return nullptr;
565 }
566 FunctionDecl * isDefaultConstructor( Declaration * decl ) {
567 if ( isConstructor( decl->get_name() ) ) {
568 if ( FunctionDecl * func = dynamic_cast< FunctionDecl * >( decl ) ) {
569 if ( func->get_functionType()->get_parameters().size() == 1 ) {
570 return func;
571 }
572 }
573 }
574 return nullptr;
575 }
[ee1635c8]576 FunctionDecl * isCopyConstructor( Declaration * decl ) {
577 return isCopyFunction( decl, "?{}" );
578 }
[2b46a13]579}
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