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source: src/SymTab/Mangler.cc @ f1917fb

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Last change on this file since f1917fb was 2fdbb3b, checked in by Thierry Delisle <tdelisle@…>, 7 years ago
Fixed some warnings
Property mode set to `100644`
File size: 12.6 KB

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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
33	namespace SymTab {
34	namespace Mangler {
35	namespace {
36	/// Mangles names to a unique C identifier
37	struct Mangler : public WithShortCircuiting, public WithVisitorRef<Mangler> {
38	Mangler( bool mangleOverridable, bool typeMode, bool mangleGenericParams );
39	Mangler( const Mangler & );
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( TupleType * tupleType );
58	void postvisit( VarArgsType * varArgsType );
59	void postvisit( ZeroType * zeroType );
60	void postvisit( OneType * oneType );
61
62	std::string get_mangleName() { return mangleName.str(); }
63	private:
64	std::ostringstream mangleName; ///< Mangled name being constructed
65	typedef std::map< std::string, std::pair< int, int > > VarMapType;
66	VarMapType varNums; ///< Map of type variables to indices
67	int nextVarNum; ///< Next type variable index
68	bool isTopLevel; ///< Is the Mangler at the top level
69	bool mangleOverridable; ///< Specially mangle overridable built-in methods
70	bool typeMode; ///< Produce a unique mangled name for a type
71	bool mangleGenericParams; ///< Include generic parameters in name mangling if true
72
73	void mangleDecl( DeclarationWithType *declaration );
74	void mangleRef( ReferenceToType *refType, std::string prefix );
75
76	void printQualifiers( Type *type );
77	}; // Mangler
78	} // namespace
79
80	std::string mangle( BaseSyntaxNode * decl, bool mangleOverridable, bool typeMode, bool mangleGenericParams ) {
81	PassVisitor<Mangler> mangler( mangleOverridable, typeMode, mangleGenericParams );
82	maybeAccept( decl, mangler );
83	return mangler.pass.get_mangleName();
84	}
85
86	std::string mangleType( Type * ty ) {
87	PassVisitor<Mangler> mangler( false, true, true );
88	maybeAccept( ty, mangler );
89	return mangler.pass.get_mangleName();
90	}
91
92	std::string mangleConcrete( Type * ty ) {
93	PassVisitor<Mangler> mangler( false, false, false );
94	maybeAccept( ty, mangler );
95	return mangler.pass.get_mangleName();
96	}
97
98	namespace {
99	Mangler::Mangler( bool mangleOverridable, bool typeMode, bool mangleGenericParams )
100	: nextVarNum( 0 ), isTopLevel( true ), mangleOverridable( mangleOverridable ), typeMode( typeMode ), mangleGenericParams( mangleGenericParams ) {}
101
102	void Mangler::mangleDecl( DeclarationWithType * declaration ) {
103	bool wasTopLevel = isTopLevel;
104	if ( isTopLevel ) {
105	varNums.clear();
106	nextVarNum = 0;
107	isTopLevel = false;
108	} // if
109	mangleName << "__";
110	CodeGen::OperatorInfo opInfo;
111	if ( operatorLookup( declaration->get_name(), opInfo ) ) {
112	mangleName << opInfo.outputName;
113	} else {
114	mangleName << declaration->get_name();
115	} // if
116	mangleName << "__";
117	maybeAccept( declaration->get_type(), *visitor );
118	if ( mangleOverridable && LinkageSpec::isOverridable( declaration->get_linkage() ) ) {
119	// want to be able to override autogenerated and intrinsic routines,
120	// so they need a different name mangling
121	if ( declaration->get_linkage() == LinkageSpec::AutoGen ) {
122	mangleName << "autogen__";
123	} else if ( declaration->get_linkage() == LinkageSpec::Intrinsic ) {
124	mangleName << "intrinsic__";
125	} else {
126	// if we add another kind of overridable function, this has to change
127	assert( false && "unknown overrideable linkage" );
128	} // if
129	}
130	isTopLevel = wasTopLevel;
131	}
132
133	void Mangler::postvisit( ObjectDecl * declaration ) {
134	mangleDecl( declaration );
135	}
136
137	void Mangler::postvisit( FunctionDecl * declaration ) {
138	mangleDecl( declaration );
139	}
140
141	void Mangler::postvisit( VoidType * voidType ) {
142	printQualifiers( voidType );
143	mangleName << "v";
144	}
145
146	void Mangler::postvisit( BasicType * basicType ) {
147	static const char *btLetter[] = {
148	"b", // Bool
149	"c", // Char
150	"Sc", // SignedChar
151	"Uc", // UnsignedChar
152	"s", // ShortSignedInt
153	"Us", // ShortUnsignedInt
154	"i", // SignedInt
155	"Ui", // UnsignedInt
156	"l", // LongSignedInt
157	"Ul", // LongUnsignedInt
158	"q", // LongLongSignedInt
159	"Uq", // LongLongUnsignedInt
160	"f", // Float
161	"d", // Double
162	"r", // LongDouble
163	"Xf", // FloatComplex
164	"Xd", // DoubleComplex
165	"Xr", // LongDoubleComplex
166	"If", // FloatImaginary
167	"Id", // DoubleImaginary
168	"Ir", // LongDoubleImaginary
169	"w", // SignedInt128
170	"Uw", // UnsignedInt128
171	};
172
173	printQualifiers( basicType );
174	mangleName << btLetter[ basicType->get_kind() ];
175	}
176
177	void Mangler::postvisit( PointerType * pointerType ) {
178	printQualifiers( pointerType );
179	mangleName << "P";
180	maybeAccept( pointerType->get_base(), *visitor );
181	}
182
183	void Mangler::postvisit( ArrayType * arrayType ) {
184	// TODO: encode dimension
185	printQualifiers( arrayType );
186	mangleName << "A0";
187	maybeAccept( arrayType->get_base(), *visitor );
188	}
189
190	void Mangler::postvisit( ReferenceType * refType ) {
191	printQualifiers( refType );
192	mangleName << "R";
193	maybeAccept( refType->get_base(), *visitor );
194	}
195
196	namespace {
197	inline std::list< Type* > getTypes( const std::list< DeclarationWithType* > decls ) {
198	std::list< Type* > ret;
199	std::transform( decls.begin(), decls.end(), std::back_inserter( ret ),
200	std::mem_fun( &DeclarationWithType::get_type ) );
201	return ret;
202	}
203	}
204
205	void Mangler::postvisit( FunctionType * functionType ) {
206	printQualifiers( functionType );
207	mangleName << "F";
208	std::list< Type* > returnTypes = getTypes( functionType->get_returnVals() );
209	acceptAll( returnTypes, *visitor );
210	mangleName << "_";
211	std::list< Type* > paramTypes = getTypes( functionType->get_parameters() );
212	acceptAll( paramTypes, *visitor );
213	mangleName << "_";
214	}
215
216	void Mangler::mangleRef( ReferenceToType * refType, std::string prefix ) {
217	printQualifiers( refType );
218
219	mangleName << ( refType->get_name().length() + prefix.length() ) << prefix << refType->get_name();
220
221	if ( mangleGenericParams ) {
222	std::list< Expression* >& params = refType->get_parameters();
223	if ( ! params.empty() ) {
224	mangleName << "_";
225	for ( std::list< Expression* >::const_iterator param = params.begin(); param != params.end(); ++param ) {
226	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
227	assertf(paramType, "Aggregate parameters should be type expressions: %s", toString(*param).c_str());
228	maybeAccept( paramType->get_type(), *visitor );
229	}
230	mangleName << "_";
231	}
232	}
233	}
234
235	void Mangler::postvisit( StructInstType * aggregateUseType ) {
236	mangleRef( aggregateUseType, "s" );
237	}
238
239	void Mangler::postvisit( UnionInstType * aggregateUseType ) {
240	mangleRef( aggregateUseType, "u" );
241	}
242
243	void Mangler::postvisit( EnumInstType * aggregateUseType ) {
244	mangleRef( aggregateUseType, "e" );
245	}
246
247	void Mangler::postvisit( TypeInstType * typeInst ) {
248	VarMapType::iterator varNum = varNums.find( typeInst->get_name() );
249	if ( varNum == varNums.end() ) {
250	mangleRef( typeInst, "t" );
251	} else {
252	printQualifiers( typeInst );
253	std::ostringstream numStream;
254	numStream << varNum->second.first;
255	switch ( (TypeDecl::Kind )varNum->second.second ) {
256	case TypeDecl::Dtype:
257	mangleName << "d";
258	break;
259	case TypeDecl::Ftype:
260	mangleName << "f";
261	break;
262	case TypeDecl::Ttype:
263	mangleName << "tVARGS";
264	break;
265	default:
266	assert( false );
267	} // switch
268	mangleName << numStream.str();
269	} // if
270	}
271
272	void Mangler::postvisit( TupleType * tupleType ) {
273	printQualifiers( tupleType );
274	mangleName << "T";
275	acceptAll( tupleType->types, *visitor );
276	mangleName << "_";
277	}
278
279	void Mangler::postvisit( VarArgsType * varArgsType ) {
280	printQualifiers( varArgsType );
281	mangleName << "VARGS";
282	}
283
284	void Mangler::postvisit( ZeroType * ) {
285	mangleName << "Z";
286	}
287
288	void Mangler::postvisit( OneType * ) {
289	mangleName << "O";
290	}
291
292	void Mangler::postvisit( TypeDecl * decl ) {
293	static const char *typePrefix[] = { "BT", "BD", "BF" };
294	mangleName << typePrefix[ decl->get_kind() ] << ( decl->name.length() + 1 ) << decl->name;
295	}
296
297	__attribute__((unused)) void printVarMap( const std::map< std::string, std::pair< int, int > > &varMap, std::ostream &os ) {
298	for ( std::map< std::string, std::pair< int, int > >::const_iterator i = varMap.begin(); i != varMap.end(); ++i ) {
299	os << i->first << "(" << i->second.first << "/" << i->second.second << ")" << std::endl;
300	} // for
301	}
302
303	void Mangler::printQualifiers( Type * type ) {
304	// skip if not including qualifiers
305	if ( typeMode ) return;
306
307	if ( ! type->get_forall().empty() ) {
308	std::list< std::string > assertionNames;
309	int tcount = 0, dcount = 0, fcount = 0, vcount = 0;
310	mangleName << "A";
311	for ( Type::ForallList::iterator i = type->forall.begin(); i != type->forall.end(); ++i ) {
312	switch ( (*i)->get_kind() ) {
313	case TypeDecl::Dtype:
314	dcount++;
315	break;
316	case TypeDecl::Ftype:
317	fcount++;
318	break;
319	case TypeDecl::Ttype:
320	vcount++;
321	break;
322	default:
323	assert( false );
324	} // switch
325	varNums[ (i)->name ] = std::pair< int, int >( nextVarNum++, (int)(i)->get_kind() );
326	for ( std::list< DeclarationWithType* >::iterator assert = (i)->assertions.begin(); assert != (i)->assertions.end(); ++assert ) {
327	PassVisitor<Mangler> sub_mangler( mangleOverridable, typeMode, mangleGenericParams );
328	sub_mangler.pass.nextVarNum = nextVarNum;
329	sub_mangler.pass.isTopLevel = false;
330	sub_mangler.pass.varNums = varNums;
331	(*assert)->accept( sub_mangler );
332	assertionNames.push_back( sub_mangler.pass.mangleName.str() );
333	} // for
334	} // for
335	mangleName << tcount << "_" << dcount << "_" << fcount << "_" << vcount << "_";
336	std::copy( assertionNames.begin(), assertionNames.end(), std::ostream_iterator< std::string >( mangleName, "" ) );
337	mangleName << "_";
338	} // if
339	if ( type->get_const() ) {
340	mangleName << "C";
341	} // if
342	if ( type->get_volatile() ) {
343	mangleName << "V";
344	} // if
345	if ( type->get_mutex() ) {
346	mangleName << "M";
347	} // if
348	// Removed due to restrict not affecting function compatibility in GCC
349	// if ( type->get_isRestrict() ) {
350	// mangleName << "E";
351	// } // if
352	if ( type->get_lvalue() ) {
353	// mangle based on whether the type is lvalue, so that the resolver can differentiate lvalues and rvalues
354	mangleName << "L";
355	}
356	if ( type->get_atomic() ) {
357	mangleName << "A";
358	} // if
359	}
360	} // namespace
361	} // namespace Mangler
362	} // namespace SymTab
363
364	// Local Variables: //
365	// tab-width: 4 //
366	// mode: c++ //
367	// compile-command: "make install" //
368	// End: //

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