1 | // |
---|
2 | // Cforall Version 1.0.0 Copyright (C) 2019 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 | // Pass.hpp -- |
---|
8 | // |
---|
9 | // Author : Thierry Delisle |
---|
10 | // Created On : Thu May 09 15:37:05 2019 |
---|
11 | // Last Modified By : |
---|
12 | // Last Modified On : |
---|
13 | // Update Count : |
---|
14 | // |
---|
15 | |
---|
16 | #pragma once |
---|
17 | // IWYU pragma: private, include "AST/Pass.hpp" |
---|
18 | |
---|
19 | #include <functional> |
---|
20 | #include <list> |
---|
21 | #include <stack> |
---|
22 | |
---|
23 | #include "AST/Fwd.hpp" |
---|
24 | #include "AST/Node.hpp" |
---|
25 | |
---|
26 | #include "AST/Attribute.hpp" |
---|
27 | #include "AST/Decl.hpp" |
---|
28 | #include "AST/Expr.hpp" |
---|
29 | #include "AST/Init.hpp" |
---|
30 | #include "AST/Stmt.hpp" |
---|
31 | #include "AST/Type.hpp" |
---|
32 | |
---|
33 | #include "AST/Visitor.hpp" |
---|
34 | |
---|
35 | #include "AST/SymbolTable.hpp" |
---|
36 | |
---|
37 | #include "AST/ForallSubstitutionTable.hpp" |
---|
38 | |
---|
39 | // Private prelude header, needed for some of the magic tricks this class pulls off |
---|
40 | #include "AST/Pass.proto.hpp" |
---|
41 | |
---|
42 | namespace ast { |
---|
43 | //------------------------------------------------------------------------------------------------- |
---|
44 | // Templated visitor type |
---|
45 | // To use declare a Pass< YOUR VISITOR TYPE > |
---|
46 | // The visitor type should specify the previsit/postvisit for types that are desired. |
---|
47 | // Note: previsit/postvisit must be **public** members |
---|
48 | // |
---|
49 | // Several additional features are available through inheritance |
---|
50 | // | PureVisitor - makes the visitor pure, it never modifies nodes in place and always |
---|
51 | // clones nodes it needs to make changes to |
---|
52 | // | WithTypeSubstitution - provides polymorphic const TypeSubstitution * env for the |
---|
53 | // current expression |
---|
54 | // | WithStmtsToAdd - provides the ability to insert statements before or after the current |
---|
55 | // statement by adding new statements into stmtsToAddBefore or |
---|
56 | // stmtsToAddAfter respectively. |
---|
57 | // | WithDeclsToAdd - provides the ability to insert declarations before or after the |
---|
58 | // current declarations by adding new DeclStmt into declsToAddBefore or |
---|
59 | // declsToAddAfter respectively. |
---|
60 | // | WithShortCircuiting - provides the ability to skip visiting child nodes; set visit_children |
---|
61 | // to false in pre{visit,visit} to skip visiting children |
---|
62 | // | WithGuards - provides the ability to save/restore data like a LIFO stack; to save, |
---|
63 | // call GuardValue with the variable to save, the variable will |
---|
64 | // automatically be restored to its previous value after the |
---|
65 | // corresponding postvisit/postmutate teminates. |
---|
66 | // | WithVisitorRef - provides an pointer to the templated visitor wrapper |
---|
67 | // | WithSymbolTable - provides symbol table functionality |
---|
68 | // | WithForallSubstitutor - maintains links between TypeInstType and TypeDecl under mutation |
---|
69 | //------------------------------------------------------------------------------------------------- |
---|
70 | template< typename core_t > |
---|
71 | class Pass final : public ast::Visitor { |
---|
72 | public: |
---|
73 | using core_type = core_t; |
---|
74 | using type = Pass<core_t>; |
---|
75 | |
---|
76 | /// Forward any arguments to the pass constructor |
---|
77 | /// Propagate 'this' if necessary |
---|
78 | template< typename... Args > |
---|
79 | Pass( Args &&... args) |
---|
80 | : core( std::forward<Args>( args )... ) |
---|
81 | { |
---|
82 | // After the pass is constructed, check if it wants the have a pointer to the wrapping visitor |
---|
83 | type * const * visitor = __pass::visitor(core, 0); |
---|
84 | if(visitor) { |
---|
85 | *const_cast<type **>( visitor ) = this; |
---|
86 | } |
---|
87 | } |
---|
88 | |
---|
89 | virtual ~Pass() = default; |
---|
90 | |
---|
91 | /// Construct and run a pass on a translation unit. |
---|
92 | template< typename... Args > |
---|
93 | static void run( std::list< ptr<Decl> > & decls, Args &&... args ) { |
---|
94 | Pass<core_t> visitor( std::forward<Args>( args )... ); |
---|
95 | accept_all( decls, visitor ); |
---|
96 | } |
---|
97 | |
---|
98 | template< typename... Args > |
---|
99 | static void run( std::list< ptr<Decl> > & decls ) { |
---|
100 | Pass<core_t> visitor; |
---|
101 | accept_all( decls, visitor ); |
---|
102 | } |
---|
103 | |
---|
104 | /// Storage for the actual pass |
---|
105 | core_t core; |
---|
106 | |
---|
107 | /// Visit function declarations |
---|
108 | const ast::DeclWithType * visit( const ast::ObjectDecl * ) override final; |
---|
109 | const ast::DeclWithType * visit( const ast::FunctionDecl * ) override final; |
---|
110 | const ast::Decl * visit( const ast::StructDecl * ) override final; |
---|
111 | const ast::Decl * visit( const ast::UnionDecl * ) override final; |
---|
112 | const ast::Decl * visit( const ast::EnumDecl * ) override final; |
---|
113 | const ast::Decl * visit( const ast::TraitDecl * ) override final; |
---|
114 | const ast::Decl * visit( const ast::TypeDecl * ) override final; |
---|
115 | const ast::Decl * visit( const ast::TypedefDecl * ) override final; |
---|
116 | const ast::AsmDecl * visit( const ast::AsmDecl * ) override final; |
---|
117 | const ast::StaticAssertDecl * visit( const ast::StaticAssertDecl * ) override final; |
---|
118 | const ast::CompoundStmt * visit( const ast::CompoundStmt * ) override final; |
---|
119 | const ast::Stmt * visit( const ast::ExprStmt * ) override final; |
---|
120 | const ast::Stmt * visit( const ast::AsmStmt * ) override final; |
---|
121 | const ast::Stmt * visit( const ast::DirectiveStmt * ) override final; |
---|
122 | const ast::Stmt * visit( const ast::IfStmt * ) override final; |
---|
123 | const ast::Stmt * visit( const ast::WhileStmt * ) override final; |
---|
124 | const ast::Stmt * visit( const ast::ForStmt * ) override final; |
---|
125 | const ast::Stmt * visit( const ast::SwitchStmt * ) override final; |
---|
126 | const ast::Stmt * visit( const ast::CaseStmt * ) override final; |
---|
127 | const ast::Stmt * visit( const ast::BranchStmt * ) override final; |
---|
128 | const ast::Stmt * visit( const ast::ReturnStmt * ) override final; |
---|
129 | const ast::Stmt * visit( const ast::ThrowStmt * ) override final; |
---|
130 | const ast::Stmt * visit( const ast::TryStmt * ) override final; |
---|
131 | const ast::Stmt * visit( const ast::CatchStmt * ) override final; |
---|
132 | const ast::Stmt * visit( const ast::FinallyStmt * ) override final; |
---|
133 | const ast::Stmt * visit( const ast::SuspendStmt * ) override final; |
---|
134 | const ast::Stmt * visit( const ast::WaitForStmt * ) override final; |
---|
135 | const ast::Decl * visit( const ast::WithStmt * ) override final; |
---|
136 | const ast::NullStmt * visit( const ast::NullStmt * ) override final; |
---|
137 | const ast::Stmt * visit( const ast::DeclStmt * ) override final; |
---|
138 | const ast::Stmt * visit( const ast::ImplicitCtorDtorStmt * ) override final; |
---|
139 | const ast::Expr * visit( const ast::ApplicationExpr * ) override final; |
---|
140 | const ast::Expr * visit( const ast::UntypedExpr * ) override final; |
---|
141 | const ast::Expr * visit( const ast::NameExpr * ) override final; |
---|
142 | const ast::Expr * visit( const ast::AddressExpr * ) override final; |
---|
143 | const ast::Expr * visit( const ast::LabelAddressExpr * ) override final; |
---|
144 | const ast::Expr * visit( const ast::CastExpr * ) override final; |
---|
145 | const ast::Expr * visit( const ast::KeywordCastExpr * ) override final; |
---|
146 | const ast::Expr * visit( const ast::VirtualCastExpr * ) override final; |
---|
147 | const ast::Expr * visit( const ast::UntypedMemberExpr * ) override final; |
---|
148 | const ast::Expr * visit( const ast::MemberExpr * ) override final; |
---|
149 | const ast::Expr * visit( const ast::VariableExpr * ) override final; |
---|
150 | const ast::Expr * visit( const ast::ConstantExpr * ) override final; |
---|
151 | const ast::Expr * visit( const ast::SizeofExpr * ) override final; |
---|
152 | const ast::Expr * visit( const ast::AlignofExpr * ) override final; |
---|
153 | const ast::Expr * visit( const ast::UntypedOffsetofExpr * ) override final; |
---|
154 | const ast::Expr * visit( const ast::OffsetofExpr * ) override final; |
---|
155 | const ast::Expr * visit( const ast::OffsetPackExpr * ) override final; |
---|
156 | const ast::Expr * visit( const ast::LogicalExpr * ) override final; |
---|
157 | const ast::Expr * visit( const ast::ConditionalExpr * ) override final; |
---|
158 | const ast::Expr * visit( const ast::CommaExpr * ) override final; |
---|
159 | const ast::Expr * visit( const ast::TypeExpr * ) override final; |
---|
160 | const ast::Expr * visit( const ast::AsmExpr * ) override final; |
---|
161 | const ast::Expr * visit( const ast::ImplicitCopyCtorExpr * ) override final; |
---|
162 | const ast::Expr * visit( const ast::ConstructorExpr * ) override final; |
---|
163 | const ast::Expr * visit( const ast::CompoundLiteralExpr * ) override final; |
---|
164 | const ast::Expr * visit( const ast::RangeExpr * ) override final; |
---|
165 | const ast::Expr * visit( const ast::UntypedTupleExpr * ) override final; |
---|
166 | const ast::Expr * visit( const ast::TupleExpr * ) override final; |
---|
167 | const ast::Expr * visit( const ast::TupleIndexExpr * ) override final; |
---|
168 | const ast::Expr * visit( const ast::TupleAssignExpr * ) override final; |
---|
169 | const ast::Expr * visit( const ast::StmtExpr * ) override final; |
---|
170 | const ast::Expr * visit( const ast::UniqueExpr * ) override final; |
---|
171 | const ast::Expr * visit( const ast::UntypedInitExpr * ) override final; |
---|
172 | const ast::Expr * visit( const ast::InitExpr * ) override final; |
---|
173 | const ast::Expr * visit( const ast::DeletedExpr * ) override final; |
---|
174 | const ast::Expr * visit( const ast::DefaultArgExpr * ) override final; |
---|
175 | const ast::Expr * visit( const ast::GenericExpr * ) override final; |
---|
176 | const ast::Type * visit( const ast::VoidType * ) override final; |
---|
177 | const ast::Type * visit( const ast::BasicType * ) override final; |
---|
178 | const ast::Type * visit( const ast::PointerType * ) override final; |
---|
179 | const ast::Type * visit( const ast::ArrayType * ) override final; |
---|
180 | const ast::Type * visit( const ast::ReferenceType * ) override final; |
---|
181 | const ast::Type * visit( const ast::QualifiedType * ) override final; |
---|
182 | const ast::Type * visit( const ast::FunctionType * ) override final; |
---|
183 | const ast::Type * visit( const ast::StructInstType * ) override final; |
---|
184 | const ast::Type * visit( const ast::UnionInstType * ) override final; |
---|
185 | const ast::Type * visit( const ast::EnumInstType * ) override final; |
---|
186 | const ast::Type * visit( const ast::TraitInstType * ) override final; |
---|
187 | const ast::Type * visit( const ast::TypeInstType * ) override final; |
---|
188 | const ast::Type * visit( const ast::TupleType * ) override final; |
---|
189 | const ast::Type * visit( const ast::TypeofType * ) override final; |
---|
190 | const ast::Type * visit( const ast::VarArgsType * ) override final; |
---|
191 | const ast::Type * visit( const ast::ZeroType * ) override final; |
---|
192 | const ast::Type * visit( const ast::OneType * ) override final; |
---|
193 | const ast::Type * visit( const ast::GlobalScopeType * ) override final; |
---|
194 | const ast::Designation * visit( const ast::Designation * ) override final; |
---|
195 | const ast::Init * visit( const ast::SingleInit * ) override final; |
---|
196 | const ast::Init * visit( const ast::ListInit * ) override final; |
---|
197 | const ast::Init * visit( const ast::ConstructorInit * ) override final; |
---|
198 | const ast::Attribute * visit( const ast::Attribute * ) override final; |
---|
199 | const ast::TypeSubstitution * visit( const ast::TypeSubstitution * ) override final; |
---|
200 | |
---|
201 | template<typename core_type> |
---|
202 | friend void accept_all( std::list< ptr<Decl> > & decls, Pass<core_type>& visitor ); |
---|
203 | private: |
---|
204 | |
---|
205 | bool __visit_children() { __pass::bool_ref * ptr = __pass::visit_children(core, 0); return ptr ? *ptr : true; } |
---|
206 | |
---|
207 | private: |
---|
208 | const ast::Stmt * call_accept( const ast::Stmt * ); |
---|
209 | const ast::Expr * call_accept( const ast::Expr * ); |
---|
210 | |
---|
211 | template< typename node_t > |
---|
212 | auto call_accept( const node_t * node ) -> typename std::enable_if< |
---|
213 | !std::is_base_of<ast::Expr, node_t>::value && |
---|
214 | !std::is_base_of<ast::Stmt, node_t>::value |
---|
215 | , decltype( node->accept(*this) ) |
---|
216 | >::type; |
---|
217 | |
---|
218 | template< template <class...> class container_t > |
---|
219 | container_t< ptr<Stmt> > call_accept( const container_t< ptr<Stmt> > & ); |
---|
220 | |
---|
221 | template< template <class...> class container_t, typename node_t > |
---|
222 | container_t< ptr<node_t> > call_accept( const container_t< ptr<node_t> > & container ); |
---|
223 | |
---|
224 | /// Mutate forall-list, accounting for presence of type substitution map |
---|
225 | template<typename node_t> |
---|
226 | void mutate_forall( const node_t *& ); |
---|
227 | |
---|
228 | public: |
---|
229 | /// Logic to call the accept and mutate the parent if needed, delegates call to accept |
---|
230 | template<typename node_t, typename parent_t, typename child_t> |
---|
231 | void maybe_accept(const node_t * &, child_t parent_t::* child); |
---|
232 | |
---|
233 | private: |
---|
234 | /// Internal RAII guard for symbol table features |
---|
235 | struct guard_symtab { |
---|
236 | guard_symtab( Pass<core_t> & pass ): pass( pass ) { __pass::symtab::enter(pass.core, 0); } |
---|
237 | ~guard_symtab() { __pass::symtab::leave(pass.core, 0); } |
---|
238 | Pass<core_t> & pass; |
---|
239 | }; |
---|
240 | |
---|
241 | /// Internal RAII guard for scope features |
---|
242 | struct guard_scope { |
---|
243 | guard_scope( Pass<core_t> & pass ): pass( pass ) { __pass::scope::enter(pass.core, 0); } |
---|
244 | ~guard_scope() { __pass::scope::leave(pass.core, 0); } |
---|
245 | Pass<core_t> & pass; |
---|
246 | }; |
---|
247 | |
---|
248 | /// Internal RAII guard for forall substitutions |
---|
249 | struct guard_forall_subs { |
---|
250 | guard_forall_subs( Pass<core_t> & pass, const ParameterizedType * type ) |
---|
251 | : pass( pass ), type( type ) { __pass::forall::enter(pass.core, 0, type ); } |
---|
252 | ~guard_forall_subs() { __pass::forall::leave(pass.core, 0, type ); } |
---|
253 | Pass<core_t> & pass; |
---|
254 | const ParameterizedType * type; |
---|
255 | }; |
---|
256 | |
---|
257 | private: |
---|
258 | bool inFunction = false; |
---|
259 | }; |
---|
260 | |
---|
261 | /// Apply a pass to an entire translation unit |
---|
262 | template<typename core_t> |
---|
263 | void accept_all( std::list< ast::ptr<ast::Decl> > &, ast::Pass<core_t> & visitor ); |
---|
264 | |
---|
265 | //------------------------------------------------------------------------------------------------- |
---|
266 | // PASS ACCESSORIES |
---|
267 | //------------------------------------------------------------------------------------------------- |
---|
268 | |
---|
269 | /// Keep track of the polymorphic const TypeSubstitution * env for the current expression |
---|
270 | |
---|
271 | /// If used the visitor will always clone nodes. |
---|
272 | struct PureVisitor {}; |
---|
273 | |
---|
274 | struct WithConstTypeSubstitution { |
---|
275 | const TypeSubstitution * env = nullptr; |
---|
276 | }; |
---|
277 | |
---|
278 | /// Used if visitor requires added statements before or after the current node. |
---|
279 | /// The Pass template handles what *before* and *after* means automatically |
---|
280 | template< template<class...> class container_t = std::list > |
---|
281 | struct WithStmtsToAdd { |
---|
282 | container_t< ptr<Stmt> > stmtsToAddBefore; |
---|
283 | container_t< ptr<Stmt> > stmtsToAddAfter; |
---|
284 | }; |
---|
285 | |
---|
286 | /// Used if visitor requires added declarations before or after the current node. |
---|
287 | /// The Pass template handles what *before* and *after* means automatically |
---|
288 | template< template<class...> class container_t = std::list > |
---|
289 | struct WithDeclsToAdd { |
---|
290 | container_t< ptr<Decl> > declsToAddBefore; |
---|
291 | container_t< ptr<Decl> > declsToAddAfter; |
---|
292 | }; |
---|
293 | |
---|
294 | /// Use if visitation should stop at certain levels |
---|
295 | /// set visit_children false of all child nodes should be ignored |
---|
296 | struct WithShortCircuiting { |
---|
297 | __pass::bool_ref visit_children; |
---|
298 | }; |
---|
299 | |
---|
300 | /// Used to restore values/functions/etc. when the Pass finishes visiting this node |
---|
301 | class WithGuards { |
---|
302 | __pass::at_cleanup_t at_cleanup = [](__pass::cleanup_func_t, void*) { |
---|
303 | std::cerr << "No cleanup function was set" << std::endl; |
---|
304 | abort(); |
---|
305 | }; |
---|
306 | |
---|
307 | template< typename core_t> |
---|
308 | friend auto __pass::at_cleanup( core_t & core, int ) -> decltype( &core.at_cleanup ); |
---|
309 | public: |
---|
310 | |
---|
311 | /// When this node is finished being visited, restore the value of a variable |
---|
312 | template< typename T > |
---|
313 | void GuardValue( T& val ) { |
---|
314 | at_cleanup( [ val ]( void * newVal ) { |
---|
315 | * static_cast< T * >( newVal ) = val; |
---|
316 | }, static_cast< void * >( & val ) ); |
---|
317 | } |
---|
318 | |
---|
319 | /// On the object, all beginScope now and endScope when the current node is finished being visited |
---|
320 | template< typename T > |
---|
321 | void GuardScope( T& val ) { |
---|
322 | val.beginScope(); |
---|
323 | at_cleanup( []( void * val ) { |
---|
324 | static_cast< T * >( val )->endScope(); |
---|
325 | }, static_cast< void * >( & val ) ); |
---|
326 | } |
---|
327 | |
---|
328 | /// When this node is finished being visited, call a function |
---|
329 | template< typename Func > |
---|
330 | void GuardAction( Func func ) { |
---|
331 | at_cleanup( [func](void *) { func(); }, nullptr ); |
---|
332 | } |
---|
333 | |
---|
334 | /// When this node is finished being visited, call a member of an object. |
---|
335 | template<typename T> |
---|
336 | void GuardMethod( T * obj, void (T::*method)() ) { |
---|
337 | at_cleanup( [ method ]( void * object ) { |
---|
338 | static_cast< T * >( object )->method(); |
---|
339 | }, static_cast< void * >( obj ) ); |
---|
340 | } |
---|
341 | }; |
---|
342 | |
---|
343 | /// Used to get a pointer to the pass with its wrapped type |
---|
344 | template<typename core_t> |
---|
345 | struct WithVisitorRef { |
---|
346 | Pass<core_t> * const visitor = nullptr; |
---|
347 | }; |
---|
348 | |
---|
349 | /// Use when the templated visitor should update the symbol table |
---|
350 | struct WithSymbolTable { |
---|
351 | SymbolTable symtab; |
---|
352 | }; |
---|
353 | |
---|
354 | /// Use when the templated visitor needs to keep TypeInstType instances properly linked to TypeDecl |
---|
355 | struct WithForallSubstitutor { |
---|
356 | ForallSubstitutionTable subs; |
---|
357 | }; |
---|
358 | |
---|
359 | } |
---|
360 | |
---|
361 | #include "Common/Stats.h" |
---|
362 | |
---|
363 | namespace ast { |
---|
364 | extern struct PassVisitorStats { |
---|
365 | size_t depth = 0; |
---|
366 | Stats::Counters::MaxCounter<double> * max; |
---|
367 | Stats::Counters::AverageCounter<double> * avg; |
---|
368 | } pass_visitor_stats; |
---|
369 | } |
---|
370 | |
---|
371 | #include "AST/Pass.impl.hpp" |
---|