source: src/SymTab/Mangler.cc@ c653b37

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 no_list persistent-indexer pthread-emulation qualifiedEnum
Last change on this file since c653b37 was e73becf, checked in by Rob Schluntz <rschlunt@…>, 7 years ago

Mangle qualified type names
  • Property mode set to 100644
File size: 14.6 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// Mangler.cc --
8//
9// Author : Richard C. Bilson
10// Created On : Sun May 17 21:40:29 2015
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Mon Sep 25 15:49:26 2017
13// Update Count : 23
14//
15#include "Mangler.h"
16
17#include <algorithm> // for copy, transform
18#include <cassert> // for assert, assertf
19#include <functional> // for const_mem_fun_t, mem_fun
20#include <iterator> // for ostream_iterator, back_insert_ite...
21#include <list> // for _List_iterator, list, _List_const...
22#include <string> // for string, char_traits, operator<<
23
24#include "CodeGen/OperatorTable.h" // for OperatorInfo, operatorLookup
25#include "Common/PassVisitor.h"
26#include "Common/SemanticError.h" // for SemanticError
27#include "Common/utility.h" // for toString
28#include "Parser/LinkageSpec.h" // for Spec, isOverridable, AutoGen, Int...
29#include "SynTree/Declaration.h" // for TypeDecl, DeclarationWithType
30#include "SynTree/Expression.h" // for TypeExpr, Expression, operator<<
31#include "SynTree/Type.h" // for Type, ReferenceToType, Type::Fora...
32
33namespace SymTab {
34 namespace Mangler {
35 namespace {
36 /// Mangles names to a unique C identifier
37 struct Mangler : public WithShortCircuiting, public WithVisitorRef<Mangler>, public WithGuards {
38 Mangler( bool mangleOverridable, bool typeMode, bool mangleGenericParams );
39 Mangler( const Mangler & ) = delete;
40
41 void previsit( BaseSyntaxNode * ) { visit_children = false; }
42
43 void postvisit( ObjectDecl * declaration );
44 void postvisit( FunctionDecl * declaration );
45 void postvisit( TypeDecl * declaration );
46
47 void postvisit( VoidType * voidType );
48 void postvisit( BasicType * basicType );
49 void postvisit( PointerType * pointerType );
50 void postvisit( ArrayType * arrayType );
51 void postvisit( ReferenceType * refType );
52 void postvisit( FunctionType * functionType );
53 void postvisit( StructInstType * aggregateUseType );
54 void postvisit( UnionInstType * aggregateUseType );
55 void postvisit( EnumInstType * aggregateUseType );
56 void postvisit( TypeInstType * aggregateUseType );
57 void postvisit( TraitInstType * inst );
58 void postvisit( TupleType * tupleType );
59 void postvisit( VarArgsType * varArgsType );
60 void postvisit( ZeroType * zeroType );
61 void postvisit( OneType * oneType );
62 void postvisit( QualifiedType * qualType );
63
64 std::string get_mangleName() { return mangleName.str(); }
65 private:
66 std::ostringstream mangleName; ///< Mangled name being constructed
67 typedef std::map< std::string, std::pair< int, int > > VarMapType;
68 VarMapType varNums; ///< Map of type variables to indices
69 int nextVarNum; ///< Next type variable index
70 bool isTopLevel; ///< Is the Mangler at the top level
71 bool mangleOverridable; ///< Specially mangle overridable built-in methods
72 bool typeMode; ///< Produce a unique mangled name for a type
73 bool mangleGenericParams; ///< Include generic parameters in name mangling if true
74 bool inFunctionType = false; ///< Include type qualifiers if false.
75
76 void mangleDecl( DeclarationWithType *declaration );
77 void mangleRef( ReferenceToType *refType, std::string prefix );
78
79 void printQualifiers( Type *type );
80 }; // Mangler
81 } // namespace
82
83 std::string mangle( BaseSyntaxNode * decl, bool mangleOverridable, bool typeMode, bool mangleGenericParams ) {
84 PassVisitor<Mangler> mangler( mangleOverridable, typeMode, mangleGenericParams );
85 maybeAccept( decl, mangler );
86 return mangler.pass.get_mangleName();
87 }
88
89 std::string mangleType( Type * ty ) {
90 PassVisitor<Mangler> mangler( false, true, true );
91 maybeAccept( ty, mangler );
92 return mangler.pass.get_mangleName();
93 }
94
95 std::string mangleConcrete( Type * ty ) {
96 PassVisitor<Mangler> mangler( false, false, false );
97 maybeAccept( ty, mangler );
98 return mangler.pass.get_mangleName();
99 }
100
101 namespace {
102 Mangler::Mangler( bool mangleOverridable, bool typeMode, bool mangleGenericParams )
103 : nextVarNum( 0 ), isTopLevel( true ), mangleOverridable( mangleOverridable ), typeMode( typeMode ), mangleGenericParams( mangleGenericParams ) {}
104
105 void Mangler::mangleDecl( DeclarationWithType * declaration ) {
106 bool wasTopLevel = isTopLevel;
107 if ( isTopLevel ) {
108 varNums.clear();
109 nextVarNum = 0;
110 isTopLevel = false;
111 } // if
112 mangleName << "__";
113 CodeGen::OperatorInfo opInfo;
114 if ( operatorLookup( declaration->get_name(), opInfo ) ) {
115 mangleName << opInfo.outputName;
116 } else {
117 mangleName << declaration->get_name();
118 } // if
119 mangleName << "__";
120 maybeAccept( declaration->get_type(), *visitor );
121 if ( mangleOverridable && LinkageSpec::isOverridable( declaration->get_linkage() ) ) {
122 // want to be able to override autogenerated and intrinsic routines,
123 // so they need a different name mangling
124 if ( declaration->get_linkage() == LinkageSpec::AutoGen ) {
125 mangleName << "autogen__";
126 } else if ( declaration->get_linkage() == LinkageSpec::Intrinsic ) {
127 mangleName << "intrinsic__";
128 } else {
129 // if we add another kind of overridable function, this has to change
130 assert( false && "unknown overrideable linkage" );
131 } // if
132 }
133 isTopLevel = wasTopLevel;
134 }
135
136 void Mangler::postvisit( ObjectDecl * declaration ) {
137 mangleDecl( declaration );
138 }
139
140 void Mangler::postvisit( FunctionDecl * declaration ) {
141 mangleDecl( declaration );
142 }
143
144 void Mangler::postvisit( VoidType * voidType ) {
145 printQualifiers( voidType );
146 mangleName << "v";
147 }
148
149 void Mangler::postvisit( BasicType * basicType ) {
150 static const char *btLetter[] = {
151 "b", // Bool
152 "c", // Char
153 "Sc", // SignedChar
154 "Uc", // UnsignedChar
155 "s", // ShortSignedInt
156 "Us", // ShortUnsignedInt
157 "i", // SignedInt
158 "Ui", // UnsignedInt
159 "l", // LongSignedInt
160 "Ul", // LongUnsignedInt
161 "q", // LongLongSignedInt
162 "Uq", // LongLongUnsignedInt
163 "f", // Float
164 "d", // Double
165 "r", // LongDouble
166 "Xf", // FloatComplex
167 "Xd", // DoubleComplex
168 "Xr", // LongDoubleComplex
169 "If", // FloatImaginary
170 "Id", // DoubleImaginary
171 "Ir", // LongDoubleImaginary
172 "w", // SignedInt128
173 "Uw", // UnsignedInt128
174 "x", // Float80
175 "y", // Float128
176 };
177 static_assert(
178 sizeof(btLetter)/sizeof(btLetter[0]) == BasicType::NUMBER_OF_BASIC_TYPES,
179 "Each basic type kind should have a corresponding mangler letter"
180 );
181
182 printQualifiers( basicType );
183 assert( basicType->get_kind() < sizeof(btLetter)/sizeof(btLetter[0]) );
184 mangleName << btLetter[ basicType->get_kind() ];
185 }
186
187 void Mangler::postvisit( PointerType * pointerType ) {
188 printQualifiers( pointerType );
189 // mangle void (*f)() and void f() to the same name to prevent overloading on functions and function pointers
190 if ( ! dynamic_cast<FunctionType *>( pointerType->base ) ) mangleName << "P";
191 maybeAccept( pointerType->base, *visitor );
192 }
193
194 void Mangler::postvisit( ArrayType * arrayType ) {
195 // TODO: encode dimension
196 printQualifiers( arrayType );
197 mangleName << "A0";
198 maybeAccept( arrayType->base, *visitor );
199 }
200
201 void Mangler::postvisit( ReferenceType * refType ) {
202 // don't print prefix (e.g. 'R') for reference types so that references and non-references do not overload.
203 // Further, do not print the qualifiers for a reference type (but do run printQualifers because of TypeDecls, etc.),
204 // by pretending every reference type is a function parameter.
205 GuardValue( inFunctionType );
206 inFunctionType = true;
207 printQualifiers( refType );
208 maybeAccept( refType->base, *visitor );
209 }
210
211 namespace {
212 inline std::list< Type* > getTypes( const std::list< DeclarationWithType* > decls ) {
213 std::list< Type* > ret;
214 std::transform( decls.begin(), decls.end(), std::back_inserter( ret ),
215 std::mem_fun( &DeclarationWithType::get_type ) );
216 return ret;
217 }
218 }
219
220 void Mangler::postvisit( FunctionType * functionType ) {
221 printQualifiers( functionType );
222 mangleName << "F";
223 // turn on inFunctionType so that printQualifiers does not print most qualifiers for function parameters,
224 // since qualifiers on outermost parameter type do not differentiate function types, e.g.,
225 // void (*)(const int) and void (*)(int) are the same type, but void (*)(const int *) and void (*)(int *) are different
226 GuardValue( inFunctionType );
227 inFunctionType = true;
228 std::list< Type* > returnTypes = getTypes( functionType->returnVals );
229 acceptAll( returnTypes, *visitor );
230 mangleName << "_";
231 std::list< Type* > paramTypes = getTypes( functionType->parameters );
232 acceptAll( paramTypes, *visitor );
233 mangleName << "_";
234 }
235
236 void Mangler::mangleRef( ReferenceToType * refType, std::string prefix ) {
237 printQualifiers( refType );
238
239 mangleName << ( refType->name.length() + prefix.length() ) << prefix << refType->name;
240
241 if ( mangleGenericParams ) {
242 std::list< Expression* >& params = refType->parameters;
243 if ( ! params.empty() ) {
244 mangleName << "_";
245 for ( std::list< Expression* >::const_iterator param = params.begin(); param != params.end(); ++param ) {
246 TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param );
247 assertf(paramType, "Aggregate parameters should be type expressions: %s", toCString(*param));
248 maybeAccept( paramType->type, *visitor );
249 }
250 mangleName << "_";
251 }
252 }
253 }
254
255 void Mangler::postvisit( StructInstType * aggregateUseType ) {
256 mangleRef( aggregateUseType, "s" );
257 }
258
259 void Mangler::postvisit( UnionInstType * aggregateUseType ) {
260 mangleRef( aggregateUseType, "u" );
261 }
262
263 void Mangler::postvisit( EnumInstType * aggregateUseType ) {
264 mangleRef( aggregateUseType, "e" );
265 }
266
267 void Mangler::postvisit( TypeInstType * typeInst ) {
268 VarMapType::iterator varNum = varNums.find( typeInst->get_name() );
269 if ( varNum == varNums.end() ) {
270 mangleRef( typeInst, "t" );
271 } else {
272 printQualifiers( typeInst );
273 std::ostringstream numStream;
274 numStream << varNum->second.first;
275 switch ( (TypeDecl::Kind )varNum->second.second ) {
276 case TypeDecl::Dtype:
277 mangleName << "d";
278 break;
279 case TypeDecl::Ftype:
280 mangleName << "f";
281 break;
282 case TypeDecl::Ttype:
283 mangleName << "tVARGS";
284 break;
285 default:
286 assert( false );
287 } // switch
288 mangleName << numStream.str();
289 } // if
290 }
291
292 void Mangler::postvisit( TraitInstType * inst ) {
293 printQualifiers( inst );
294 mangleName << "_Y" << inst->name << "_";
295 }
296
297 void Mangler::postvisit( TupleType * tupleType ) {
298 printQualifiers( tupleType );
299 mangleName << "T";
300 acceptAll( tupleType->types, *visitor );
301 mangleName << "_";
302 }
303
304 void Mangler::postvisit( VarArgsType * varArgsType ) {
305 printQualifiers( varArgsType );
306 mangleName << "VARGS";
307 }
308
309 void Mangler::postvisit( ZeroType * ) {
310 mangleName << "Z";
311 }
312
313 void Mangler::postvisit( OneType * ) {
314 mangleName << "O";
315 }
316
317 void Mangler::postvisit( QualifiedType * qualType ) {
318 maybeAccept( qualType->parent, *visitor );
319 mangleName << "__";
320 maybeAccept( qualType->child, *visitor );
321 }
322
323 void Mangler::postvisit( TypeDecl * decl ) {
324 static const char *typePrefix[] = { "BT", "BD", "BF" };
325 mangleName << typePrefix[ decl->get_kind() ] << ( decl->name.length() + 1 ) << decl->name;
326 }
327
328 __attribute__((unused)) void printVarMap( const std::map< std::string, std::pair< int, int > > &varMap, std::ostream &os ) {
329 for ( std::map< std::string, std::pair< int, int > >::const_iterator i = varMap.begin(); i != varMap.end(); ++i ) {
330 os << i->first << "(" << i->second.first << "/" << i->second.second << ")" << std::endl;
331 } // for
332 }
333
334 void Mangler::printQualifiers( Type * type ) {
335 // skip if not including qualifiers
336 if ( typeMode ) return;
337 if ( ! type->get_forall().empty() ) {
338 std::list< std::string > assertionNames;
339 int tcount = 0, dcount = 0, fcount = 0, vcount = 0;
340 mangleName << "A";
341 for ( Type::ForallList::iterator i = type->forall.begin(); i != type->forall.end(); ++i ) {
342 switch ( (*i)->get_kind() ) {
343 case TypeDecl::Dtype:
344 dcount++;
345 break;
346 case TypeDecl::Ftype:
347 fcount++;
348 break;
349 case TypeDecl::Ttype:
350 vcount++;
351 break;
352 default:
353 assert( false );
354 } // switch
355 varNums[ (*i)->name ] = std::pair< int, int >( nextVarNum++, (int)(*i)->get_kind() );
356 for ( std::list< DeclarationWithType* >::iterator assert = (*i)->assertions.begin(); assert != (*i)->assertions.end(); ++assert ) {
357 PassVisitor<Mangler> sub_mangler( mangleOverridable, typeMode, mangleGenericParams );
358 sub_mangler.pass.nextVarNum = nextVarNum;
359 sub_mangler.pass.isTopLevel = false;
360 sub_mangler.pass.varNums = varNums;
361 (*assert)->accept( sub_mangler );
362 assertionNames.push_back( sub_mangler.pass.mangleName.str() );
363 } // for
364 } // for
365 mangleName << tcount << "_" << dcount << "_" << fcount << "_" << vcount << "_";
366 std::copy( assertionNames.begin(), assertionNames.end(), std::ostream_iterator< std::string >( mangleName, "" ) );
367 mangleName << "_";
368 } // if
369 if ( ! inFunctionType ) {
370 // these qualifiers do not distinguish the outermost type of a function parameter
371 if ( type->get_const() ) {
372 mangleName << "C";
373 } // if
374 if ( type->get_volatile() ) {
375 mangleName << "V";
376 } // if
377 // Removed due to restrict not affecting function compatibility in GCC
378 // if ( type->get_isRestrict() ) {
379 // mangleName << "E";
380 // } // if
381 if ( type->get_atomic() ) {
382 mangleName << "A";
383 } // if
384 }
385 if ( type->get_mutex() ) {
386 mangleName << "M";
387 } // if
388 if ( type->get_lvalue() ) {
389 // mangle based on whether the type is lvalue, so that the resolver can differentiate lvalues and rvalues
390 mangleName << "L";
391 }
392
393 if ( inFunctionType ) {
394 // turn off inFunctionType so that types can be differentiated for nested qualifiers
395 GuardValue( inFunctionType );
396 inFunctionType = false;
397 }
398 }
399 } // namespace
400 } // namespace Mangler
401} // namespace SymTab
402
403// Local Variables: //
404// tab-width: 4 //
405// mode: c++ //
406// compile-command: "make install" //
407// End: //
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