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source: src/SymTab/Mangler.cc @ 1f133dc

ADTaaron-thesisarm-ehast-experimentalcleanup-dtorsdeferred_resndemanglerenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprno_listpersistent-indexerpthread-emulationqualifiedEnum

Last change on this file since 1f133dc 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
33	namespace 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: //

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