source: src/SymTab/Mangler.cc@ 4c3ee8d

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 4c3ee8d was 3530f39a, checked in by Rob Schluntz <rschlunt@…>, 7 years ago

Fix mangling for float80/128
  • Property mode set to 100644
File size: 14.3 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
63 std::string get_mangleName() { return mangleName.str(); }
64 private:
65 std::ostringstream mangleName; ///< Mangled name being constructed
66 typedef std::map< std::string, std::pair< int, int > > VarMapType;
67 VarMapType varNums; ///< Map of type variables to indices
68 int nextVarNum; ///< Next type variable index
69 bool isTopLevel; ///< Is the Mangler at the top level
70 bool mangleOverridable; ///< Specially mangle overridable built-in methods
71 bool typeMode; ///< Produce a unique mangled name for a type
72 bool mangleGenericParams; ///< Include generic parameters in name mangling if true
73 bool inFunctionType = false; ///< Include type qualifiers if false.
74
75 void mangleDecl( DeclarationWithType *declaration );
76 void mangleRef( ReferenceToType *refType, std::string prefix );
77
78 void printQualifiers( Type *type );
79 }; // Mangler
80 } // namespace
81
82 std::string mangle( BaseSyntaxNode * decl, bool mangleOverridable, bool typeMode, bool mangleGenericParams ) {
83 PassVisitor<Mangler> mangler( mangleOverridable, typeMode, mangleGenericParams );
84 maybeAccept( decl, mangler );
85 return mangler.pass.get_mangleName();
86 }
87
88 std::string mangleType( Type * ty ) {
89 PassVisitor<Mangler> mangler( false, true, true );
90 maybeAccept( ty, mangler );
91 return mangler.pass.get_mangleName();
92 }
93
94 std::string mangleConcrete( Type * ty ) {
95 PassVisitor<Mangler> mangler( false, false, false );
96 maybeAccept( ty, mangler );
97 return mangler.pass.get_mangleName();
98 }
99
100 namespace {
101 Mangler::Mangler( bool mangleOverridable, bool typeMode, bool mangleGenericParams )
102 : nextVarNum( 0 ), isTopLevel( true ), mangleOverridable( mangleOverridable ), typeMode( typeMode ), mangleGenericParams( mangleGenericParams ) {}
103
104 void Mangler::mangleDecl( DeclarationWithType * declaration ) {
105 bool wasTopLevel = isTopLevel;
106 if ( isTopLevel ) {
107 varNums.clear();
108 nextVarNum = 0;
109 isTopLevel = false;
110 } // if
111 mangleName << "__";
112 CodeGen::OperatorInfo opInfo;
113 if ( operatorLookup( declaration->get_name(), opInfo ) ) {
114 mangleName << opInfo.outputName;
115 } else {
116 mangleName << declaration->get_name();
117 } // if
118 mangleName << "__";
119 maybeAccept( declaration->get_type(), *visitor );
120 if ( mangleOverridable && LinkageSpec::isOverridable( declaration->get_linkage() ) ) {
121 // want to be able to override autogenerated and intrinsic routines,
122 // so they need a different name mangling
123 if ( declaration->get_linkage() == LinkageSpec::AutoGen ) {
124 mangleName << "autogen__";
125 } else if ( declaration->get_linkage() == LinkageSpec::Intrinsic ) {
126 mangleName << "intrinsic__";
127 } else {
128 // if we add another kind of overridable function, this has to change
129 assert( false && "unknown overrideable linkage" );
130 } // if
131 }
132 isTopLevel = wasTopLevel;
133 }
134
135 void Mangler::postvisit( ObjectDecl * declaration ) {
136 mangleDecl( declaration );
137 }
138
139 void Mangler::postvisit( FunctionDecl * declaration ) {
140 mangleDecl( declaration );
141 }
142
143 void Mangler::postvisit( VoidType * voidType ) {
144 printQualifiers( voidType );
145 mangleName << "v";
146 }
147
148 void Mangler::postvisit( BasicType * basicType ) {
149 static const char *btLetter[] = {
150 "b", // Bool
151 "c", // Char
152 "Sc", // SignedChar
153 "Uc", // UnsignedChar
154 "s", // ShortSignedInt
155 "Us", // ShortUnsignedInt
156 "i", // SignedInt
157 "Ui", // UnsignedInt
158 "l", // LongSignedInt
159 "Ul", // LongUnsignedInt
160 "q", // LongLongSignedInt
161 "Uq", // LongLongUnsignedInt
162 "f", // Float
163 "d", // Double
164 "r", // LongDouble
165 "Xf", // FloatComplex
166 "Xd", // DoubleComplex
167 "Xr", // LongDoubleComplex
168 "If", // FloatImaginary
169 "Id", // DoubleImaginary
170 "Ir", // LongDoubleImaginary
171 "w", // SignedInt128
172 "Uw", // UnsignedInt128
173 "x", // Float80
174 "y", // Float128
175 };
176 static_assert(
177 sizeof(btLetter)/sizeof(btLetter[0]) == BasicType::NUMBER_OF_BASIC_TYPES,
178 "Each basic type kind should have a corresponding mangler letter"
179 );
180
181 printQualifiers( basicType );
182 assert( basicType->get_kind() < sizeof(btLetter)/sizeof(btLetter[0]) );
183 mangleName << btLetter[ basicType->get_kind() ];
184 }
185
186 void Mangler::postvisit( PointerType * pointerType ) {
187 printQualifiers( pointerType );
188 // mangle void (*f)() and void f() to the same name to prevent overloading on functions and function pointers
189 if ( ! dynamic_cast<FunctionType *>( pointerType->base ) ) mangleName << "P";
190 maybeAccept( pointerType->base, *visitor );
191 }
192
193 void Mangler::postvisit( ArrayType * arrayType ) {
194 // TODO: encode dimension
195 printQualifiers( arrayType );
196 mangleName << "A0";
197 maybeAccept( arrayType->base, *visitor );
198 }
199
200 void Mangler::postvisit( ReferenceType * refType ) {
201 // don't print prefix (e.g. 'R') for reference types so that references and non-references do not overload.
202 // Further, do not print the qualifiers for a reference type (but do run printQualifers because of TypeDecls, etc.),
203 // by pretending every reference type is a function parameter.
204 GuardValue( inFunctionType );
205 inFunctionType = true;
206 printQualifiers( refType );
207 maybeAccept( refType->base, *visitor );
208 }
209
210 namespace {
211 inline std::list< Type* > getTypes( const std::list< DeclarationWithType* > decls ) {
212 std::list< Type* > ret;
213 std::transform( decls.begin(), decls.end(), std::back_inserter( ret ),
214 std::mem_fun( &DeclarationWithType::get_type ) );
215 return ret;
216 }
217 }
218
219 void Mangler::postvisit( FunctionType * functionType ) {
220 printQualifiers( functionType );
221 mangleName << "F";
222 // turn on inFunctionType so that printQualifiers does not print most qualifiers for function parameters,
223 // since qualifiers on outermost parameter type do not differentiate function types, e.g.,
224 // void (*)(const int) and void (*)(int) are the same type, but void (*)(const int *) and void (*)(int *) are different
225 GuardValue( inFunctionType );
226 inFunctionType = true;
227 std::list< Type* > returnTypes = getTypes( functionType->returnVals );
228 acceptAll( returnTypes, *visitor );
229 mangleName << "_";
230 std::list< Type* > paramTypes = getTypes( functionType->parameters );
231 acceptAll( paramTypes, *visitor );
232 mangleName << "_";
233 }
234
235 void Mangler::mangleRef( ReferenceToType * refType, std::string prefix ) {
236 printQualifiers( refType );
237
238 mangleName << ( refType->name.length() + prefix.length() ) << prefix << refType->name;
239
240 if ( mangleGenericParams ) {
241 std::list< Expression* >& params = refType->parameters;
242 if ( ! params.empty() ) {
243 mangleName << "_";
244 for ( std::list< Expression* >::const_iterator param = params.begin(); param != params.end(); ++param ) {
245 TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param );
246 assertf(paramType, "Aggregate parameters should be type expressions: %s", toCString(*param));
247 maybeAccept( paramType->type, *visitor );
248 }
249 mangleName << "_";
250 }
251 }
252 }
253
254 void Mangler::postvisit( StructInstType * aggregateUseType ) {
255 mangleRef( aggregateUseType, "s" );
256 }
257
258 void Mangler::postvisit( UnionInstType * aggregateUseType ) {
259 mangleRef( aggregateUseType, "u" );
260 }
261
262 void Mangler::postvisit( EnumInstType * aggregateUseType ) {
263 mangleRef( aggregateUseType, "e" );
264 }
265
266 void Mangler::postvisit( TypeInstType * typeInst ) {
267 VarMapType::iterator varNum = varNums.find( typeInst->get_name() );
268 if ( varNum == varNums.end() ) {
269 mangleRef( typeInst, "t" );
270 } else {
271 printQualifiers( typeInst );
272 std::ostringstream numStream;
273 numStream << varNum->second.first;
274 switch ( (TypeDecl::Kind )varNum->second.second ) {
275 case TypeDecl::Dtype:
276 mangleName << "d";
277 break;
278 case TypeDecl::Ftype:
279 mangleName << "f";
280 break;
281 case TypeDecl::Ttype:
282 mangleName << "tVARGS";
283 break;
284 default:
285 assert( false );
286 } // switch
287 mangleName << numStream.str();
288 } // if
289 }
290
291 void Mangler::postvisit( TraitInstType * inst ) {
292 printQualifiers( inst );
293 mangleName << "_Y" << inst->name << "_";
294 }
295
296 void Mangler::postvisit( TupleType * tupleType ) {
297 printQualifiers( tupleType );
298 mangleName << "T";
299 acceptAll( tupleType->types, *visitor );
300 mangleName << "_";
301 }
302
303 void Mangler::postvisit( VarArgsType * varArgsType ) {
304 printQualifiers( varArgsType );
305 mangleName << "VARGS";
306 }
307
308 void Mangler::postvisit( ZeroType * ) {
309 mangleName << "Z";
310 }
311
312 void Mangler::postvisit( OneType * ) {
313 mangleName << "O";
314 }
315
316 void Mangler::postvisit( TypeDecl * decl ) {
317 static const char *typePrefix[] = { "BT", "BD", "BF" };
318 mangleName << typePrefix[ decl->get_kind() ] << ( decl->name.length() + 1 ) << decl->name;
319 }
320
321 __attribute__((unused)) void printVarMap( const std::map< std::string, std::pair< int, int > > &varMap, std::ostream &os ) {
322 for ( std::map< std::string, std::pair< int, int > >::const_iterator i = varMap.begin(); i != varMap.end(); ++i ) {
323 os << i->first << "(" << i->second.first << "/" << i->second.second << ")" << std::endl;
324 } // for
325 }
326
327 void Mangler::printQualifiers( Type * type ) {
328 // skip if not including qualifiers
329 if ( typeMode ) return;
330 if ( ! type->get_forall().empty() ) {
331 std::list< std::string > assertionNames;
332 int tcount = 0, dcount = 0, fcount = 0, vcount = 0;
333 mangleName << "A";
334 for ( Type::ForallList::iterator i = type->forall.begin(); i != type->forall.end(); ++i ) {
335 switch ( (*i)->get_kind() ) {
336 case TypeDecl::Dtype:
337 dcount++;
338 break;
339 case TypeDecl::Ftype:
340 fcount++;
341 break;
342 case TypeDecl::Ttype:
343 vcount++;
344 break;
345 default:
346 assert( false );
347 } // switch
348 varNums[ (*i)->name ] = std::pair< int, int >( nextVarNum++, (int)(*i)->get_kind() );
349 for ( std::list< DeclarationWithType* >::iterator assert = (*i)->assertions.begin(); assert != (*i)->assertions.end(); ++assert ) {
350 PassVisitor<Mangler> sub_mangler( mangleOverridable, typeMode, mangleGenericParams );
351 sub_mangler.pass.nextVarNum = nextVarNum;
352 sub_mangler.pass.isTopLevel = false;
353 sub_mangler.pass.varNums = varNums;
354 (*assert)->accept( sub_mangler );
355 assertionNames.push_back( sub_mangler.pass.mangleName.str() );
356 } // for
357 } // for
358 mangleName << tcount << "_" << dcount << "_" << fcount << "_" << vcount << "_";
359 std::copy( assertionNames.begin(), assertionNames.end(), std::ostream_iterator< std::string >( mangleName, "" ) );
360 mangleName << "_";
361 } // if
362 if ( ! inFunctionType ) {
363 // these qualifiers do not distinguish the outermost type of a function parameter
364 if ( type->get_const() ) {
365 mangleName << "C";
366 } // if
367 if ( type->get_volatile() ) {
368 mangleName << "V";
369 } // if
370 // Removed due to restrict not affecting function compatibility in GCC
371 // if ( type->get_isRestrict() ) {
372 // mangleName << "E";
373 // } // if
374 if ( type->get_atomic() ) {
375 mangleName << "A";
376 } // if
377 }
378 if ( type->get_mutex() ) {
379 mangleName << "M";
380 } // if
381 if ( type->get_lvalue() ) {
382 // mangle based on whether the type is lvalue, so that the resolver can differentiate lvalues and rvalues
383 mangleName << "L";
384 }
385
386 if ( inFunctionType ) {
387 // turn off inFunctionType so that types can be differentiated for nested qualifiers
388 GuardValue( inFunctionType );
389 inFunctionType = false;
390 }
391 }
392 } // namespace
393 } // namespace Mangler
394} // namespace SymTab
395
396// Local Variables: //
397// tab-width: 4 //
398// mode: c++ //
399// compile-command: "make install" //
400// End: //
Note: See TracBrowser for help on using the repository browser.