source: src/Common/PassVisitor.h@ b96d7c1

ADT arm-eh ast-experimental cleanup-dtors enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since b96d7c1 was 02fdb8e, checked in by Thierry Delisle <tdelisle@…>, 6 years ago

Added WithConstTypeSubstitution accessory on pass visitor.
Mostly exploratory work, figuring out what can be const
  • Property mode set to 100644
File size: 21.6 KB
Line 
1#pragma once
2
3// IWYU pragma: private, include "Common/PassVisitor.h"
4
5#include <stack>
6#include <type_traits>
7
8#include "Common/Stats.h"
9#include "Common/utility.h"
10
11#include "SynTree/Mutator.h"
12#include "SynTree/Visitor.h"
13
14#include "SymTab/Indexer.h"
15
16#include "SynTree/Attribute.h"
17#include "SynTree/Initializer.h"
18#include "SynTree/Statement.h"
19#include "SynTree/Type.h"
20#include "SynTree/Declaration.h"
21#include "SynTree/Expression.h"
22#include "SynTree/Constant.h"
23
24class TypeSubstitution;
25
26#include "PassVisitor.proto.h"
27
28//-------------------------------------------------------------------------------------------------------------------------------------------------------------------------
29// Templated visitor type
30// To use declare a PassVisitor< YOUR VISITOR TYPE >
31// The visitor type should specify the previsit/postvisit/premutate/postmutate for types that are desired.
32// Note: previsit/postvisit/premutate/postmutate must be **public** members
33//
34// Several additional features are available through inheritance
35// | WithTypeSubstitution - provides polymorphic TypeSubstitution * env for the current expression
36// | WithStmtsToAdd - provides the ability to insert statements before or after the current statement by adding new statements into
37// stmtsToAddBefore or stmtsToAddAfter respectively.
38// | WithShortCircuiting - provides the ability to skip visiting child nodes; set visit_children to false in pre{visit,mutate} to skip visiting children
39// | WithGuards - provides the ability to save/restore data like a LIFO stack; to save, call GuardValue with the variable to save, the variable
40// will automatically be restored to its previous value after the corresponding postvisit/postmutate teminates.
41//-------------------------------------------------------------------------------------------------------------------------------------------------------------------------
42template< typename pass_type >
43class PassVisitor final : public Visitor, public Mutator {
44public:
45
46 template< typename... Args >
47 PassVisitor(Args &&... args)
48 : pass( std::forward<Args>( args )... )
49 {
50 typedef PassVisitor<pass_type> this_t;
51 this_t * const * visitor = visitor_impl(pass, 0);
52 if(visitor) {
53 *const_cast<this_t **>( visitor ) = this;
54 }
55 }
56
57 virtual ~PassVisitor() = default;
58
59 pass_type pass;
60
61 virtual void visit( ObjectDecl * objectDecl ) override final;
62 virtual void visit( FunctionDecl * functionDecl ) override final;
63 virtual void visit( StructDecl * aggregateDecl ) override final;
64 virtual void visit( UnionDecl * aggregateDecl ) override final;
65 virtual void visit( EnumDecl * aggregateDecl ) override final;
66 virtual void visit( TraitDecl * aggregateDecl ) override final;
67 virtual void visit( TypeDecl * typeDecl ) override final;
68 virtual void visit( TypedefDecl * typeDecl ) override final;
69 virtual void visit( AsmDecl * asmDecl ) override final;
70 virtual void visit( StaticAssertDecl * assertDecl ) override final;
71
72 virtual void visit( CompoundStmt * compoundStmt ) override final;
73 virtual void visit( ExprStmt * exprStmt ) override final;
74 virtual void visit( AsmStmt * asmStmt ) override final;
75 virtual void visit( DirectiveStmt * dirStmt ) override final;
76 virtual void visit( IfStmt * ifStmt ) override final;
77 virtual void visit( WhileStmt * whileStmt ) override final;
78 virtual void visit( ForStmt * forStmt ) override final;
79 virtual void visit( SwitchStmt * switchStmt ) override final;
80 virtual void visit( CaseStmt * caseStmt ) override final;
81 virtual void visit( BranchStmt * branchStmt ) override final;
82 virtual void visit( ReturnStmt * returnStmt ) override final;
83 virtual void visit( ThrowStmt * throwStmt ) override final;
84 virtual void visit( TryStmt * tryStmt ) override final;
85 virtual void visit( CatchStmt * catchStmt ) override final;
86 virtual void visit( FinallyStmt * finallyStmt ) override final;
87 virtual void visit( WaitForStmt * waitforStmt ) override final;
88 virtual void visit( WithStmt * withStmt ) override final;
89 virtual void visit( NullStmt * nullStmt ) override final;
90 virtual void visit( DeclStmt * declStmt ) override final;
91 virtual void visit( ImplicitCtorDtorStmt * impCtorDtorStmt ) override final;
92
93 virtual void visit( ApplicationExpr * applicationExpr ) override final;
94 virtual void visit( UntypedExpr * untypedExpr ) override final;
95 virtual void visit( NameExpr * nameExpr ) override final;
96 virtual void visit( CastExpr * castExpr ) override final;
97 virtual void visit( KeywordCastExpr * castExpr ) override final;
98 virtual void visit( VirtualCastExpr * castExpr ) override final;
99 virtual void visit( AddressExpr * addressExpr ) override final;
100 virtual void visit( LabelAddressExpr * labAddressExpr ) override final;
101 virtual void visit( UntypedMemberExpr * memberExpr ) override final;
102 virtual void visit( MemberExpr * memberExpr ) override final;
103 virtual void visit( VariableExpr * variableExpr ) override final;
104 virtual void visit( ConstantExpr * constantExpr ) override final;
105 virtual void visit( SizeofExpr * sizeofExpr ) override final;
106 virtual void visit( AlignofExpr * alignofExpr ) override final;
107 virtual void visit( UntypedOffsetofExpr * offsetofExpr ) override final;
108 virtual void visit( OffsetofExpr * offsetofExpr ) override final;
109 virtual void visit( OffsetPackExpr * offsetPackExpr ) override final;
110 virtual void visit( AttrExpr * attrExpr ) override final;
111 virtual void visit( LogicalExpr * logicalExpr ) override final;
112 virtual void visit( ConditionalExpr * conditionalExpr ) override final;
113 virtual void visit( CommaExpr * commaExpr ) override final;
114 virtual void visit( TypeExpr * typeExpr ) override final;
115 virtual void visit( AsmExpr * asmExpr ) override final;
116 virtual void visit( ImplicitCopyCtorExpr * impCpCtorExpr ) override final;
117 virtual void visit( ConstructorExpr * ctorExpr ) override final;
118 virtual void visit( CompoundLiteralExpr * compLitExpr ) override final;
119 virtual void visit( RangeExpr * rangeExpr ) override final;
120 virtual void visit( UntypedTupleExpr * tupleExpr ) override final;
121 virtual void visit( TupleExpr * tupleExpr ) override final;
122 virtual void visit( TupleIndexExpr * tupleExpr ) override final;
123 virtual void visit( TupleAssignExpr * assignExpr ) override final;
124 virtual void visit( StmtExpr * stmtExpr ) override final;
125 virtual void visit( UniqueExpr * uniqueExpr ) override final;
126 virtual void visit( UntypedInitExpr * initExpr ) override final;
127 virtual void visit( InitExpr * initExpr ) override final;
128 virtual void visit( DeletedExpr * delExpr ) override final;
129 virtual void visit( DefaultArgExpr * argExpr ) override final;
130 virtual void visit( GenericExpr * genExpr ) override final;
131
132 virtual void visit( VoidType * basicType ) override final;
133 virtual void visit( BasicType * basicType ) override final;
134 virtual void visit( PointerType * pointerType ) override final;
135 virtual void visit( ArrayType * arrayType ) override final;
136 virtual void visit( ReferenceType * referenceType ) override final;
137 virtual void visit( QualifiedType * qualType ) override final;
138 virtual void visit( FunctionType * functionType ) override final;
139 virtual void visit( StructInstType * aggregateUseType ) override final;
140 virtual void visit( UnionInstType * aggregateUseType ) override final;
141 virtual void visit( EnumInstType * aggregateUseType ) override final;
142 virtual void visit( TraitInstType * aggregateUseType ) override final;
143 virtual void visit( TypeInstType * aggregateUseType ) override final;
144 virtual void visit( TupleType * tupleType ) override final;
145 virtual void visit( TypeofType * typeofType ) override final;
146 virtual void visit( AttrType * attrType ) override final;
147 virtual void visit( VarArgsType * varArgsType ) override final;
148 virtual void visit( ZeroType * zeroType ) override final;
149 virtual void visit( OneType * oneType ) override final;
150 virtual void visit( GlobalScopeType * globalType ) override final;
151
152 virtual void visit( Designation * designation ) override final;
153 virtual void visit( SingleInit * singleInit ) override final;
154 virtual void visit( ListInit * listInit ) override final;
155 virtual void visit( ConstructorInit * ctorInit ) override final;
156
157 virtual void visit( Subrange * subrange ) override final;
158
159 virtual void visit( Constant * constant ) override final;
160
161 virtual void visit( Attribute * attribute ) override final;
162
163 virtual DeclarationWithType * mutate( ObjectDecl * objectDecl ) override final;
164 virtual DeclarationWithType * mutate( FunctionDecl * functionDecl ) override final;
165 virtual Declaration * mutate( StructDecl * aggregateDecl ) override final;
166 virtual Declaration * mutate( UnionDecl * aggregateDecl ) override final;
167 virtual Declaration * mutate( EnumDecl * aggregateDecl ) override final;
168 virtual Declaration * mutate( TraitDecl * aggregateDecl ) override final;
169 virtual Declaration * mutate( TypeDecl * typeDecl ) override final;
170 virtual Declaration * mutate( TypedefDecl * typeDecl ) override final;
171 virtual AsmDecl * mutate( AsmDecl * asmDecl ) override final;
172 virtual StaticAssertDecl * mutate( StaticAssertDecl * assertDecl ) override final;
173
174 virtual CompoundStmt * mutate( CompoundStmt * compoundStmt ) override final;
175 virtual Statement * mutate( ExprStmt * exprStmt ) override final;
176 virtual Statement * mutate( AsmStmt * asmStmt ) override final;
177 virtual Statement * mutate( DirectiveStmt * dirStmt ) override final;
178 virtual Statement * mutate( IfStmt * ifStmt ) override final;
179 virtual Statement * mutate( WhileStmt * whileStmt ) override final;
180 virtual Statement * mutate( ForStmt * forStmt ) override final;
181 virtual Statement * mutate( SwitchStmt * switchStmt ) override final;
182 virtual Statement * mutate( CaseStmt * caseStmt ) override final;
183 virtual Statement * mutate( BranchStmt * branchStmt ) override final;
184 virtual Statement * mutate( ReturnStmt * returnStmt ) override final;
185 virtual Statement * mutate( ThrowStmt * throwStmt ) override final;
186 virtual Statement * mutate( TryStmt * tryStmt ) override final;
187 virtual Statement * mutate( CatchStmt * catchStmt ) override final;
188 virtual Statement * mutate( FinallyStmt * finallyStmt ) override final;
189 virtual Statement * mutate( WaitForStmt * waitforStmt ) override final;
190 virtual Statement * mutate( WithStmt * withStmt ) override final;
191 virtual NullStmt * mutate( NullStmt * nullStmt ) override final;
192 virtual Statement * mutate( DeclStmt * declStmt ) override final;
193 virtual Statement * mutate( ImplicitCtorDtorStmt * impCtorDtorStmt ) override final;
194
195 virtual Expression * mutate( ApplicationExpr * applicationExpr ) override final;
196 virtual Expression * mutate( UntypedExpr * untypedExpr ) override final;
197 virtual Expression * mutate( NameExpr * nameExpr ) override final;
198 virtual Expression * mutate( AddressExpr * addrExpr ) override final;
199 virtual Expression * mutate( LabelAddressExpr * labAddressExpr ) override final;
200 virtual Expression * mutate( CastExpr * castExpr ) override final;
201 virtual Expression * mutate( KeywordCastExpr * castExpr ) override final;
202 virtual Expression * mutate( VirtualCastExpr * castExpr ) override final;
203 virtual Expression * mutate( UntypedMemberExpr * memberExpr ) override final;
204 virtual Expression * mutate( MemberExpr * memberExpr ) override final;
205 virtual Expression * mutate( VariableExpr * variableExpr ) override final;
206 virtual Expression * mutate( ConstantExpr * constantExpr ) override final;
207 virtual Expression * mutate( SizeofExpr * sizeofExpr ) override final;
208 virtual Expression * mutate( AlignofExpr * alignofExpr ) override final;
209 virtual Expression * mutate( UntypedOffsetofExpr * offsetofExpr ) override final;
210 virtual Expression * mutate( OffsetofExpr * offsetofExpr ) override final;
211 virtual Expression * mutate( OffsetPackExpr * offsetPackExpr ) override final;
212 virtual Expression * mutate( AttrExpr * attrExpr ) override final;
213 virtual Expression * mutate( LogicalExpr * logicalExpr ) override final;
214 virtual Expression * mutate( ConditionalExpr * conditionalExpr ) override final;
215 virtual Expression * mutate( CommaExpr * commaExpr ) override final;
216 virtual Expression * mutate( TypeExpr * typeExpr ) override final;
217 virtual Expression * mutate( AsmExpr * asmExpr ) override final;
218 virtual Expression * mutate( ImplicitCopyCtorExpr * impCpCtorExpr ) override final;
219 virtual Expression * mutate( ConstructorExpr * ctorExpr ) override final;
220 virtual Expression * mutate( CompoundLiteralExpr * compLitExpr ) override final;
221 virtual Expression * mutate( RangeExpr * rangeExpr ) override final;
222 virtual Expression * mutate( UntypedTupleExpr * tupleExpr ) override final;
223 virtual Expression * mutate( TupleExpr * tupleExpr ) override final;
224 virtual Expression * mutate( TupleIndexExpr * tupleExpr ) override final;
225 virtual Expression * mutate( TupleAssignExpr * assignExpr ) override final;
226 virtual Expression * mutate( StmtExpr * stmtExpr ) override final;
227 virtual Expression * mutate( UniqueExpr * uniqueExpr ) override final;
228 virtual Expression * mutate( UntypedInitExpr * initExpr ) override final;
229 virtual Expression * mutate( InitExpr * initExpr ) override final;
230 virtual Expression * mutate( DeletedExpr * delExpr ) override final;
231 virtual Expression * mutate( DefaultArgExpr * argExpr ) override final;
232 virtual Expression * mutate( GenericExpr * genExpr ) override final;
233
234 virtual Type * mutate( VoidType * basicType ) override final;
235 virtual Type * mutate( BasicType * basicType ) override final;
236 virtual Type * mutate( PointerType * pointerType ) override final;
237 virtual Type * mutate( ArrayType * arrayType ) override final;
238 virtual Type * mutate( ReferenceType * referenceType ) override final;
239 virtual Type * mutate( QualifiedType * qualType ) override final;
240 virtual Type * mutate( FunctionType * functionType ) override final;
241 virtual Type * mutate( StructInstType * aggregateUseType ) override final;
242 virtual Type * mutate( UnionInstType * aggregateUseType ) override final;
243 virtual Type * mutate( EnumInstType * aggregateUseType ) override final;
244 virtual Type * mutate( TraitInstType * aggregateUseType ) override final;
245 virtual Type * mutate( TypeInstType * aggregateUseType ) override final;
246 virtual Type * mutate( TupleType * tupleType ) override final;
247 virtual Type * mutate( TypeofType * typeofType ) override final;
248 virtual Type * mutate( AttrType * attrType ) override final;
249 virtual Type * mutate( VarArgsType * varArgsType ) override final;
250 virtual Type * mutate( ZeroType * zeroType ) override final;
251 virtual Type * mutate( OneType * oneType ) override final;
252 virtual Type * mutate( GlobalScopeType * globalType ) override final;
253
254 virtual Designation * mutate( Designation * designation ) override final;
255 virtual Initializer * mutate( SingleInit * singleInit ) override final;
256 virtual Initializer * mutate( ListInit * listInit ) override final;
257 virtual Initializer * mutate( ConstructorInit * ctorInit ) override final;
258
259 virtual Subrange * mutate( Subrange * subrange ) override final;
260
261 virtual Constant * mutate( Constant * constant ) override final;
262
263 virtual Attribute * mutate( Attribute * attribute ) override final;
264
265 virtual TypeSubstitution * mutate( TypeSubstitution * sub ) final;
266
267private:
268 bool inFunction = false;
269
270 template<typename pass_t> friend void acceptAll( std::list< Declaration* > &decls, PassVisitor< pass_t >& visitor );
271 template<typename pass_t> friend void mutateAll( std::list< Declaration* > &decls, PassVisitor< pass_t >& visitor );
272 template< typename TreeType, typename pass_t > friend void maybeAccept_impl( TreeType * tree, PassVisitor< pass_t > & visitor );
273 template< typename TreeType, typename pass_t > friend void maybeMutate_impl( TreeType *& tree, PassVisitor< pass_t > & mutator );
274 template< typename Container, typename pass_t > friend void maybeAccept_impl( Container & container, PassVisitor< pass_t > & visitor );
275 template< typename Container, typename pass_t > friend void maybeMutate_impl( Container & container, PassVisitor< pass_t > & mutator );
276
277 template<typename node_type> void call_previsit ( node_type * node ) { previsit_impl ( pass, node, 0 ); }
278 template<typename node_type> void call_postvisit( node_type * node ) { postvisit_impl( pass, node, 0 ); }
279
280 template<typename node_type> void call_premutate ( node_type * node ) { premutate_impl( pass, node, 0 ); }
281 template<typename return_type, typename node_type> return_type call_postmutate ( node_type * node ) { return postmutate_impl<return_type>( pass, node, 0 ); }
282
283 void call_beginScope() { begin_scope_impl( pass, 0 ); }
284 void call_endScope () { end_scope_impl ( pass, 0 ); }
285
286 void set_env( TypeSubstitution * env ) { set_env_impl( pass, env, 0); }
287
288 template< typename func_t >
289 void handleStatementList( std::list< Statement * > & statements, func_t func );
290 void visitStatementList ( std::list< Statement* > &statements );
291 void mutateStatementList( std::list< Statement* > &statements );
292
293 template< typename func_t >
294 Statement * handleStatement( Statement * stmt, func_t func );
295 Statement * visitStatement ( Statement * stmt );
296 Statement * mutateStatement( Statement * stmt );
297
298 template< typename func_t >
299 Expression * handleExpression( Expression * expr, func_t func );
300 Expression * visitExpression ( Expression * expr );
301 Expression * mutateExpression( Expression * expr );
302
303
304 auto get_env_ptr () -> decltype(env_impl( pass, 0)) { return env_impl( pass, 0); }
305 std::list< Statement* > * get_beforeStmts() { return stmtsToAddBefore_impl( pass, 0); }
306 std::list< Statement* > * get_afterStmts () { return stmtsToAddAfter_impl ( pass, 0); }
307 std::list< Declaration* > * get_beforeDecls() { return declsToAddBefore_impl( pass, 0); }
308 std::list< Declaration* > * get_afterDecls () { return declsToAddAfter_impl ( pass, 0); }
309
310 bool get_visit_children () { bool_ref * ptr = visit_children_impl(pass, 0); return ptr ? *ptr : true; }
311 bool_ref * get_visit_children_ptr() { return visit_children_impl(pass, 0); }
312
313 void indexerScopeEnter () { indexer_impl_enterScope ( pass, 0 ); }
314 void indexerScopeLeave () { indexer_impl_leaveScope ( pass, 0 ); }
315 void indexerAddId ( DeclarationWithType * node ) { indexer_impl_addId ( pass, 0, node ); }
316 void indexerAddType ( NamedTypeDecl * node ) { indexer_impl_addType ( pass, 0, node ); }
317 void indexerAddStruct ( const std::string & id ) { indexer_impl_addStruct ( pass, 0, id ); }
318 void indexerAddStruct ( StructDecl * node ) { indexer_impl_addStruct ( pass, 0, node ); }
319 void indexerAddStructFwd( StructDecl * node ) { indexer_impl_addStructFwd( pass, 0, node ); }
320 void indexerAddEnum ( EnumDecl * node ) { indexer_impl_addEnum ( pass, 0, node ); }
321 void indexerAddUnion ( const std::string & id ) { indexer_impl_addUnion ( pass, 0, id ); }
322 void indexerAddUnion ( UnionDecl * node ) { indexer_impl_addUnion ( pass, 0, node ); }
323 void indexerAddUnionFwd ( UnionDecl * node ) { indexer_impl_addUnionFwd ( pass, 0, node ); }
324 void indexerAddTrait ( TraitDecl * node ) { indexer_impl_addTrait ( pass, 0, node ); }
325 void indexerAddWith ( std::list< Expression * > & exprs, BaseSyntaxNode * withStmt ) { indexer_impl_addWith( pass, 0, exprs, withStmt ); }
326
327
328 template< typename TreeType, typename VisitorType >
329 friend inline void indexerScopedAccept( TreeType * tree, VisitorType &visitor );
330
331 template< typename TreeType, typename VisitorType >
332 friend inline void indexerScopedMutate( TreeType *& tree, VisitorType &visitor );
333};
334
335template<typename pass_type, typename T>
336void GuardValue( pass_type * pass, T& val ) {
337 pass->at_cleanup( [ val ]( void * newVal ) {
338 * static_cast< T * >( newVal ) = val;
339 }, static_cast< void * >( & val ) );
340}
341
342class WithTypeSubstitution {
343protected:
344 WithTypeSubstitution() = default;
345 ~WithTypeSubstitution() = default;
346
347public:
348 TypeSubstitution * env = nullptr;
349};
350
351class WithConstTypeSubstitution {
352protected:
353 WithConstTypeSubstitution() = default;
354 ~WithConstTypeSubstitution() = default;
355
356public:
357 const TypeSubstitution * env = nullptr;
358};
359
360class WithStmtsToAdd {
361protected:
362 WithStmtsToAdd() = default;
363 ~WithStmtsToAdd() = default;
364
365public:
366 std::list< Statement* > stmtsToAddBefore;
367 std::list< Statement* > stmtsToAddAfter;
368};
369
370class WithDeclsToAdd {
371protected:
372 WithDeclsToAdd() = default;
373 ~WithDeclsToAdd() {
374 assert( declsToAddBefore.empty() );
375 }
376
377public:
378 std::list< Declaration* > declsToAddBefore;
379 std::list< Declaration* > declsToAddAfter;
380};
381
382class WithShortCircuiting {
383protected:
384 WithShortCircuiting() = default;
385 ~WithShortCircuiting() = default;
386
387public:
388 bool_ref visit_children;
389};
390
391class WithGuards {
392protected:
393 WithGuards() = default;
394 ~WithGuards() = default;
395
396public:
397 at_cleanup_t at_cleanup;
398
399 template< typename T >
400 void GuardValue( T& val ) {
401 at_cleanup( [ val ]( void * newVal ) {
402 * static_cast< T * >( newVal ) = val;
403 }, static_cast< void * >( & val ) );
404 }
405
406 template< typename T >
407 void GuardScope( T& val ) {
408 val.beginScope();
409 at_cleanup( []( void * val ) {
410 static_cast< T * >( val )->endScope();
411 }, static_cast< void * >( & val ) );
412 }
413
414 template< typename Func >
415 void GuardAction( Func func ) {
416 at_cleanup( [func](__attribute__((unused)) void *) { func(); }, nullptr );
417 }
418};
419
420template<typename pass_type>
421class WithVisitorRef {
422protected:
423 WithVisitorRef() {}
424 ~WithVisitorRef() {}
425
426public:
427 PassVisitor<pass_type> * const visitor = nullptr;
428};
429
430class WithIndexer {
431protected:
432 WithIndexer() {}
433 ~WithIndexer() {}
434
435public:
436 SymTab::Indexer indexer;
437};
438
439#include "Common/Stats.h"
440
441extern struct PassVisitorStats {
442 size_t depth = 0;
443 Stats::Counters::MaxCounter<double> * max = nullptr;
444 Stats::Counters::AverageCounter<double> * avg = nullptr;
445} pass_visitor_stats;
446
447#include "SynTree/TypeSubstitution.h"
448#include "PassVisitor.impl.h"
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