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source: src/GenPoly/Box.cc@ 888cbe4

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Last change on this file since 888cbe4 was c2ad3c9, checked in by Aaron Moss <a3moss@…>, 9 years ago
fix explicit cast error for returning polymorphic types, also potential infinite loop in findGeneric
Property mode set to `100644`
File size: 109.7 KB

Rev	Line
[51587aa]	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	//
[ae63a18]	7	// Box.cc --
[51587aa]	8	//
	9	// Author : Richard C. Bilson
	10	// Created On : Mon May 18 07:44:20 2015
[bdf1954]	11	// Last Modified By : Rob Schluntz
[189243c]	12	// Last Modified On : Fri May 13 14:51:21 2016
[d63eeb0]	13	// Update Count : 295
[51587aa]	14	//
[51b73452]	15
[4e284ea6]	16	#include <algorithm>
	17	#include <iterator>
	18	#include <list>
	19	#include <map>
[51b73452]	20	#include <set>
[b1a6d6b]	21	#include <stack>
[51b73452]	22	#include <string>
[4e284ea6]	23	#include <utility>
	24	#include <vector>
[51b73452]	25	#include <cassert>
	26
	27	#include "Box.h"
[9d7b3ea]	28	#include "DeclMutator.h"
[51b73452]	29	#include "PolyMutator.h"
	30	#include "FindFunction.h"
[6635c74]	31	#include "ScopedMap.h"
[89173242]	32	#include "ScopedSet.h"
[51b73452]	33	#include "ScrubTyVars.h"
	34
[68cd1ce]	35	#include "Parser/ParseNode.h"
	36
[cdec5af]	37	#include "SynTree/Constant.h"
[4e284ea6]	38	#include "SynTree/Declaration.h"
[51b73452]	39	#include "SynTree/Expression.h"
	40	#include "SynTree/Initializer.h"
	41	#include "SynTree/Mutator.h"
[4e284ea6]	42	#include "SynTree/Statement.h"
	43	#include "SynTree/Type.h"
	44	#include "SynTree/TypeSubstitution.h"
[68cd1ce]	45
[51b73452]	46	#include "ResolvExpr/TypeEnvironment.h"
[dc12481]	47	#include "ResolvExpr/TypeMap.h"
	48	#include "ResolvExpr/typeops.h"
[68cd1ce]	49
[4e284ea6]	50	#include "SymTab/Indexer.h"
[51b73452]	51	#include "SymTab/Mangler.h"
	52
[d3b7937]	53	#include "Common/SemanticError.h"
	54	#include "Common/UniqueName.h"
	55	#include "Common/utility.h"
[51b73452]	56
	57	#include <ext/functional> // temporary
	58
	59	namespace GenPoly {
[01aeade]	60	namespace {
	61	const std::list<Label> noLabels;
	62
[e56cfdb0]	63	FunctionType makeAdapterType( FunctionType adaptee, const TyVarMap &tyVars );
	64
[d1caa6c]	65	/// Abstracts type equality for a list of parameter types
	66	struct TypeList {
	67	TypeList() : params() {}
	68	TypeList( const std::list< Type* > &_params ) : params() { cloneAll(_params, params); }
	69	TypeList( std::list< Type* > &&_params ) : params( _params ) {}
[4e284ea6]	70
[d1caa6c]	71	TypeList( const TypeList &that ) : params() { cloneAll(that.params, params); }
	72	TypeList( TypeList &&that ) : params( std::move( that.params ) ) {}
[4e284ea6]	73
	74	/// Extracts types from a list of TypeExpr*
[d1caa6c]	75	TypeList( const std::list< TypeExpr* >& _params ) : params() {
[4e284ea6]	76	for ( std::list< TypeExpr* >::const_iterator param = _params.begin(); param != _params.end(); ++param ) {
	77	params.push_back( (*param)->get_type()->clone() );
	78	}
	79	}
	80
[d1caa6c]	81	TypeList& operator= ( const TypeList &that ) {
[4e284ea6]	82	deleteAll( params );
	83
[d1caa6c]	84	params.clear();
[4e284ea6]	85	cloneAll( that.params, params );
	86
	87	return *this;
	88	}
	89
[d1caa6c]	90	TypeList& operator= ( TypeList &&that ) {
	91	deleteAll( params );
[4e284ea6]	92
[d1caa6c]	93	params = std::move( that.params );
[4e284ea6]	94
[d1caa6c]	95	return *this;
	96	}
	97
	98	~TypeList() { deleteAll( params ); }
	99
	100	bool operator== ( const TypeList& that ) const {
[4e284ea6]	101	if ( params.size() != that.params.size() ) return false;
[d1caa6c]	102
	103	SymTab::Indexer dummy;
[4e284ea6]	104	for ( std::list< Type* >::const_iterator it = params.begin(), jt = that.params.begin(); it != params.end(); ++it, ++jt ) {
	105	if ( ! ResolvExpr::typesCompatible( it, jt, dummy ) ) return false;
	106	}
	107	return true;
	108	}
	109
	110	std::list< Type* > params; ///< Instantiation parameters
	111	};
	112
[d1caa6c]	113	/// Maps a key and a TypeList to the some value, accounting for scope
	114	template< typename Key, typename Value >
[4e284ea6]	115	class InstantiationMap {
[d1caa6c]	116	/// Wraps value for a specific (Key, TypeList) combination
	117	typedef std::pair< TypeList, Value* > Instantiation;
[0531b5d]	118	/// List of TypeLists paired with their appropriate values
	119	typedef std::vector< Instantiation > ValueList;
	120	/// Underlying map type; maps keys to a linear list of corresponding TypeLists and values
[89173242]	121	typedef ScopedMap< Key*, ValueList > InnerMap;
[4e284ea6]	122
[0531b5d]	123	InnerMap instantiations; ///< instantiations
[4e284ea6]	124
	125	public:
	126	/// Starts a new scope
[0531b5d]	127	void beginScope() { instantiations.beginScope(); }
[4e284ea6]	128
	129	/// Ends a scope
[0531b5d]	130	void endScope() { instantiations.endScope(); }
[4e284ea6]	131
[d1caa6c]	132	/// Gets the value for the (key, typeList) pair, returns NULL on none such.
[0531b5d]	133	Value lookup( Key key, const std::list< TypeExpr* >& params ) const {
	134	TypeList typeList( params );
[4e284ea6]	135
[0531b5d]	136	// scan scopes for matches to the key
	137	for ( typename InnerMap::const_iterator insts = instantiations.find( key ); insts != instantiations.end(); insts = instantiations.findNext( insts, key ) ) {
	138	for ( typename ValueList::const_reverse_iterator inst = insts->second.rbegin(); inst != insts->second.rend(); ++inst ) {
[d1caa6c]	139	if ( inst->first == typeList ) return inst->second;
[4e284ea6]	140	}
	141	}
[0531b5d]	142	// no matching instantiations found
[4e284ea6]	143	return 0;
	144	}
	145
[d1caa6c]	146	/// Adds a value for a (key, typeList) pair to the current scope
	147	void insert( Key key, const std::list< TypeExpr > &params, Value *value ) {
[0531b5d]	148	instantiations[ key ].push_back( Instantiation( TypeList( params ), value ) );
[4e284ea6]	149	}
	150	};
	151
[9d7b3ea]	152	/// Adds layout-generation functions to polymorphic types
	153	class LayoutFunctionBuilder : public DeclMutator {
	154	unsigned int functionNesting; // current level of nested functions
	155	public:
	156	LayoutFunctionBuilder() : functionNesting( 0 ) {}
	157
	158	virtual DeclarationWithType mutate( FunctionDecl functionDecl );
	159	virtual Declaration mutate( StructDecl structDecl );
	160	virtual Declaration mutate( UnionDecl unionDecl );
	161	};
[70a06f6]	162
[f8b961b]	163	/// Replaces polymorphic return types with out-parameters, replaces calls to polymorphic functions with adapter calls as needed, and adds appropriate type variables to the function call
[01aeade]	164	class Pass1 : public PolyMutator {
	165	public:
	166	Pass1();
	167	virtual Expression mutate( ApplicationExpr appExpr );
	168	virtual Expression mutate( AddressExpr addrExpr );
	169	virtual Expression mutate( UntypedExpr expr );
	170	virtual DeclarationWithType* mutate( FunctionDecl *functionDecl );
	171	virtual TypeDecl mutate( TypeDecl typeDecl );
	172	virtual Expression mutate( CommaExpr commaExpr );
	173	virtual Expression mutate( ConditionalExpr condExpr );
[cf16f94]	174	virtual Statement * mutate( ReturnStmt *returnStmt );
[01aeade]	175	virtual Type mutate( PointerType pointerType );
[cf16f94]	176	virtual Type * mutate( FunctionType *functionType );
[ae63a18]	177
[01aeade]	178	virtual void doBeginScope();
	179	virtual void doEndScope();
	180	private:
[5c52b06]	181	/// Pass the extra type parameters from polymorphic generic arguments or return types into a function application
	182	void passArgTypeVars( ApplicationExpr appExpr, Type parmType, Type argBaseType, std::list< Expression >::iterator &arg, const TyVarMap &exprTyVars, std::set< std::string > &seenTypes );
[05d47278]	183	/// passes extra type parameters into a polymorphic function application
[5c52b06]	184	void passTypeVars( ApplicationExpr appExpr, ReferenceToType polyRetType, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars );
[48ca586]	185	/// wraps a function application with a new temporary for the out-parameter return value
[01aeade]	186	Expression addRetParam( ApplicationExpr appExpr, FunctionType function, Type retType, std::list< Expression *>::iterator &arg );
[48ca586]	187	/// Replaces all the type parameters of a generic type with their concrete equivalents under the current environment
	188	void replaceParametersWithConcrete( ApplicationExpr appExpr, std::list< Expression >& params );
	189	/// Replaces a polymorphic type with its concrete equivalant under the current environment (returns itself if concrete).
	190	/// If `doClone` is set to false, will not clone interior types
	191	Type replaceWithConcrete( ApplicationExpr appExpr, Type *type, bool doClone = true );
	192	/// wraps a function application returning a polymorphic type with a new temporary for the out-parameter return value
	193	Expression addPolyRetParam( ApplicationExpr appExpr, FunctionType function, ReferenceToType polyType, std::list< Expression *>::iterator &arg );
[01aeade]	194	Expression applyAdapter( ApplicationExpr appExpr, FunctionType function, std::list< Expression >::iterator &arg, const TyVarMap &exprTyVars );
	195	void boxParam( Type formal, Expression &arg, const TyVarMap &exprTyVars );
	196	void boxParams( ApplicationExpr appExpr, FunctionType function, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars );
	197	void addInferredParams( ApplicationExpr appExpr, FunctionType functionType, std::list< Expression *>::iterator &arg, const TyVarMap &tyVars );
[1194734]	198	/// Stores assignment operators from assertion list in local map of assignment operations
[c2ad3c9]	199	void findTypeOps( const std::list< TypeDecl *> &forall );
[01aeade]	200	void passAdapters( ApplicationExpr appExpr, FunctionType functionType, const TyVarMap &exprTyVars );
	201	FunctionDecl makeAdapter( FunctionType adaptee, FunctionType *realType, const std::string &mangleName, const TyVarMap &tyVars );
[05d47278]	202	/// Replaces intrinsic operator functions with their arithmetic desugaring
[01aeade]	203	Expression handleIntrinsics( ApplicationExpr appExpr );
[05d47278]	204	/// Inserts a new temporary variable into the current scope with an auto-generated name
[01aeade]	205	ObjectDecl makeTemporary( Type type );
[c29d9ce]	206
[c2ad3c9]	207	ScopedMap< std::string, DeclarationWithType* > assignOps; ///< Currently known type variable assignment operators
	208	ScopedMap< std::string, DeclarationWithType* > ctorOps; ///< Currently known type variable constructors
	209	ScopedMap< std::string, DeclarationWithType* > copyOps; ///< Currently known type variable copy constructors
	210	ScopedMap< std::string, DeclarationWithType* > dtorOps; ///< Currently known type variable destructors
[89173242]	211	ResolvExpr::TypeMap< DeclarationWithType > scopedAssignOps; ///< Currently known assignment operators
[c2ad3c9]	212	ResolvExpr::TypeMap< DeclarationWithType > scopedCtorOps; ///< Currently known assignment operators
	213	ResolvExpr::TypeMap< DeclarationWithType > scopedCopyOps; ///< Currently known assignment operators
	214	ResolvExpr::TypeMap< DeclarationWithType > scopedDtorOps; ///< Currently known assignment operators
[89173242]	215	ScopedMap< std::string, DeclarationWithType* > adapters; ///< Set of adapter functions in the current scope
[70a06f6]	216
[01aeade]	217	DeclarationWithType *retval;
	218	bool useRetval;
	219	UniqueName tempNamer;
	220	};
	221
[89173242]	222	/// * Moves polymorphic returns in function types to pointer-type parameters
	223	/// * adds type size and assertion parameters to parameter lists
[01aeade]	224	class Pass2 : public PolyMutator {
	225	public:
	226	template< typename DeclClass >
	227	DeclClass handleDecl( DeclClass decl, Type *type );
	228	virtual DeclarationWithType mutate( FunctionDecl functionDecl );
	229	virtual ObjectDecl mutate( ObjectDecl objectDecl );
	230	virtual TypeDecl mutate( TypeDecl typeDecl );
	231	virtual TypedefDecl mutate( TypedefDecl typedefDecl );
	232	virtual Type mutate( PointerType pointerType );
	233	virtual Type mutate( FunctionType funcType );
[70a06f6]	234
[01aeade]	235	private:
	236	void addAdapters( FunctionType *functionType );
[ae63a18]	237
[01aeade]	238	std::map< UniqueId, std::string > adapterName;
	239	};
	240
[4e284ea6]	241	/// Mutator pass that replaces concrete instantiations of generic types with actual struct declarations, scoped appropriately
	242	class GenericInstantiator : public DeclMutator {
	243	/// Map of (generic type, parameter list) pairs to concrete type instantiations
[d1caa6c]	244	InstantiationMap< AggregateDecl, AggregateDecl > instantiations;
[4e284ea6]	245	/// Namer for concrete types
	246	UniqueName typeNamer;
	247
	248	public:
	249	GenericInstantiator() : DeclMutator(), instantiations(), typeNamer("_conc_") {}
	250
	251	virtual Type* mutate( StructInstType *inst );
	252	virtual Type* mutate( UnionInstType *inst );
	253
	254	// virtual Expression* mutate( MemberExpr *memberExpr );
	255
	256	virtual void doBeginScope();
	257	virtual void doEndScope();
	258	private:
	259	/// Wrap instantiation lookup for structs
	260	StructDecl* lookup( StructInstType inst, const std::list< TypeExpr > &typeSubs ) { return (StructDecl*)instantiations.lookup( inst->get_baseStruct(), typeSubs ); }
	261	/// Wrap instantiation lookup for unions
	262	UnionDecl* lookup( UnionInstType inst, const std::list< TypeExpr > &typeSubs ) { return (UnionDecl*)instantiations.lookup( inst->get_baseUnion(), typeSubs ); }
	263	/// Wrap instantiation insertion for structs
	264	void insert( StructInstType inst, const std::list< TypeExpr > &typeSubs, StructDecl *decl ) { instantiations.insert( inst->get_baseStruct(), typeSubs, decl ); }
	265	/// Wrap instantiation insertion for unions
	266	void insert( UnionInstType inst, const std::list< TypeExpr > &typeSubs, UnionDecl *decl ) { instantiations.insert( inst->get_baseUnion(), typeSubs, decl ); }
	267	};
	268
[8a34677]	269	/// Replaces member and size/align/offsetof expressions on polymorphic generic types with calculated expressions.
	270	/// * Replaces member expressions for polymorphic types with calculated add-field-offset-and-dereference
	271	/// * Calculates polymorphic offsetof expressions from offset array
	272	/// * Inserts dynamic calculation of polymorphic type layouts where needed
	273	class PolyGenericCalculator : public PolyMutator {
	274	public:
[05d47278]	275	template< typename DeclClass >
	276	DeclClass handleDecl( DeclClass decl, Type *type );
	277	virtual DeclarationWithType mutate( FunctionDecl functionDecl );
	278	virtual ObjectDecl mutate( ObjectDecl objectDecl );
	279	virtual TypedefDecl mutate( TypedefDecl objectDecl );
	280	virtual TypeDecl mutate( TypeDecl objectDecl );
	281	virtual Statement mutate( DeclStmt declStmt );
	282	virtual Type mutate( PointerType pointerType );
	283	virtual Type mutate( FunctionType funcType );
	284	virtual Expression mutate( MemberExpr memberExpr );
[8a34677]	285	virtual Expression mutate( SizeofExpr sizeofExpr );
	286	virtual Expression mutate( AlignofExpr alignofExpr );
[2a4b088]	287	virtual Expression mutate( OffsetofExpr offsetofExpr );
[8a34677]	288	virtual Expression mutate( OffsetPackExpr offsetPackExpr );
	289
	290	virtual void doBeginScope();
	291	virtual void doEndScope();
	292
	293	private:
	294	/// Makes a new variable in the current scope with the given name, type & optional initializer
	295	ObjectDecl makeVar( const std::string &name, Type type, Initializer *init = 0 );
	296	/// returns true if the type has a dynamic layout; such a layout will be stored in appropriately-named local variables when the function returns
	297	bool findGeneric( Type *ty );
	298	/// adds type parameters to the layout call; will generate the appropriate parameters if needed
	299	void addOtypeParamsToLayoutCall( UntypedExpr layoutCall, const std::list< Type > &otypeParams );
[aa19ccf]	300
	301	/// Enters a new scope for type-variables, adding the type variables from ty
	302	void beginTypeScope( Type *ty );
	303	/// Exits the type-variable scope
	304	void endTypeScope();
[70a06f6]	305
[8a34677]	306	ScopedSet< std::string > knownLayouts; ///< Set of generic type layouts known in the current scope, indexed by sizeofName
	307	ScopedSet< std::string > knownOffsets; ///< Set of non-generic types for which the offset array exists in the current scope, indexed by offsetofName
[05d47278]	308	};
[b4cd03b7]	309
[f8b961b]	310	/// Replaces initialization of polymorphic values with alloca, declaration of dtype/ftype with appropriate void expression, and sizeof expressions of polymorphic types with the proper variable
[01aeade]	311	class Pass3 : public PolyMutator {
	312	public:
	313	template< typename DeclClass >
	314	DeclClass handleDecl( DeclClass decl, Type *type );
	315	virtual DeclarationWithType mutate( FunctionDecl functionDecl );
	316	virtual ObjectDecl mutate( ObjectDecl objectDecl );
	317	virtual TypedefDecl mutate( TypedefDecl objectDecl );
	318	virtual TypeDecl mutate( TypeDecl objectDecl );
	319	virtual Type mutate( PointerType pointerType );
	320	virtual Type mutate( FunctionType funcType );
	321	private:
	322	};
	323
	324	} // anonymous namespace
	325
[05d47278]	326	/// version of mutateAll with special handling for translation unit so you can check the end of the prelude when debugging
	327	template< typename MutatorType >
	328	inline void mutateTranslationUnit( std::list< Declaration* > &translationUnit, MutatorType &mutator ) {
	329	bool seenIntrinsic = false;
	330	SemanticError errors;
	331	for ( typename std::list< Declaration* >::iterator i = translationUnit.begin(); i != translationUnit.end(); ++i ) {
	332	try {
	333	if ( *i ) {
	334	if ( (*i)->get_linkage() == LinkageSpec::Intrinsic ) {
	335	seenIntrinsic = true;
	336	} else if ( seenIntrinsic ) {
	337	seenIntrinsic = false; // break on this line when debugging for end of prelude
	338	}
[b4cd03b7]	339
[05d47278]	340	i = dynamic_cast< Declaration >( (*i)->acceptMutator( mutator ) );
	341	assert( *i );
	342	} // if
	343	} catch( SemanticError &e ) {
	344	errors.append( e );
	345	} // try
	346	} // for
	347	if ( ! errors.isEmpty() ) {
	348	throw errors;
	349	} // if
	350	}
	351
[01aeade]	352	void box( std::list< Declaration *>& translationUnit ) {
[9d7b3ea]	353	LayoutFunctionBuilder layoutBuilder;
[01aeade]	354	Pass1 pass1;
	355	Pass2 pass2;
[4e284ea6]	356	GenericInstantiator instantiator;
[8a34677]	357	PolyGenericCalculator polyCalculator;
[01aeade]	358	Pass3 pass3;
[70a06f6]	359
[9d7b3ea]	360	layoutBuilder.mutateDeclarationList( translationUnit );
[05d47278]	361	mutateTranslationUnit/All/( translationUnit, pass1 );
	362	mutateTranslationUnit/All/( translationUnit, pass2 );
[4e284ea6]	363	instantiator.mutateDeclarationList( translationUnit );
[8a34677]	364	mutateTranslationUnit/All/( translationUnit, polyCalculator );
[05d47278]	365	mutateTranslationUnit/All/( translationUnit, pass3 );
[6c3744e]	366	}
	367
[9d7b3ea]	368	////////////////////////////////// LayoutFunctionBuilder ////////////////////////////////////////////
	369
	370	DeclarationWithType LayoutFunctionBuilder::mutate( FunctionDecl functionDecl ) {
	371	functionDecl->set_functionType( maybeMutate( functionDecl->get_functionType(), *this ) );
	372	mutateAll( functionDecl->get_oldDecls(), *this );
	373	++functionNesting;
	374	functionDecl->set_statements( maybeMutate( functionDecl->get_statements(), *this ) );
	375	--functionNesting;
	376	return functionDecl;
	377	}
[70a06f6]	378
[9d7b3ea]	379	/// Get a list of type declarations that will affect a layout function
	380	std::list< TypeDecl* > takeOtypeOnly( std::list< TypeDecl* > &decls ) {
	381	std::list< TypeDecl * > otypeDecls;
	382
	383	for ( std::list< TypeDecl* >::const_iterator decl = decls.begin(); decl != decls.end(); ++decl ) {
[3627356]	384	if ( (*decl)->get_kind() == TypeDecl::Any ) {
[9d7b3ea]	385	otypeDecls.push_back( *decl );
	386	}
	387	}
[70a06f6]	388
[9d7b3ea]	389	return otypeDecls;
	390	}
	391
	392	/// Adds parameters for otype layout to a function type
	393	void addOtypeParams( FunctionType layoutFnType, std::list< TypeDecl > &otypeParams ) {
	394	BasicType sizeAlignType( Type::Qualifiers(), BasicType::LongUnsignedInt );
[70a06f6]	395
[9d7b3ea]	396	for ( std::list< TypeDecl* >::const_iterator param = otypeParams.begin(); param != otypeParams.end(); ++param ) {
[2e60a1a]	397	TypeInstType paramType( Type::Qualifiers(), (param)->get_name(), param );
[adc6781]	398	std::string paramName = mangleType( &paramType );
	399	layoutFnType->get_parameters().push_back( new ObjectDecl( sizeofName( paramName ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignType.clone(), 0 ) );
	400	layoutFnType->get_parameters().push_back( new ObjectDecl( alignofName( paramName ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignType.clone(), 0 ) );
[9d7b3ea]	401	}
	402	}
	403
	404	/// Builds a layout function declaration
[adc6781]	405	FunctionDecl buildLayoutFunctionDecl( AggregateDecl typeDecl, unsigned int functionNesting, FunctionType *layoutFnType ) {
[9d7b3ea]	406	// Routines at global scope marked "static" to prevent multiple definitions is separate translation units
	407	// because each unit generates copies of the default routines for each aggregate.
	408	FunctionDecl *layoutDecl = new FunctionDecl(
[adc6781]	409	layoutofName( typeDecl ), functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, layoutFnType, new CompoundStmt( noLabels ), true, false );
[9d7b3ea]	410	layoutDecl->fixUniqueId();
	411	return layoutDecl;
	412	}
	413
	414	/// Makes a unary operation
	415	Expression makeOp( const std::string &name, Expression arg ) {
	416	UntypedExpr *expr = new UntypedExpr( new NameExpr( name ) );
	417	expr->get_args().push_back( arg );
	418	return expr;
	419	}
	420
	421	/// Makes a binary operation
	422	Expression makeOp( const std::string &name, Expression lhs, Expression *rhs ) {
	423	UntypedExpr *expr = new UntypedExpr( new NameExpr( name ) );
	424	expr->get_args().push_back( lhs );
	425	expr->get_args().push_back( rhs );
	426	return expr;
	427	}
	428
	429	/// Returns the dereference of a local pointer variable
	430	Expression derefVar( ObjectDecl var ) {
	431	return makeOp( "*?", new VariableExpr( var ) );
	432	}
	433
	434	/// makes an if-statement with a single-expression if-block and no then block
	435	Statement makeCond( Expression cond, Expression *ifPart ) {
[3627356]	436	return new IfStmt( noLabels, cond, new ExprStmt( noLabels, ifPart ), 0 );
[9d7b3ea]	437	}
	438
	439	/// makes a statement that assigns rhs to lhs if lhs < rhs
	440	Statement makeAssignMax( Expression lhs, Expression *rhs ) {
	441	return makeCond( makeOp( "?<?", lhs, rhs ), makeOp( "?=?", lhs->clone(), rhs->clone() ) );
	442	}
	443
	444	/// makes a statement that aligns lhs to rhs (rhs should be an integer power of two)
	445	Statement makeAlignTo( Expression lhs, Expression *rhs ) {
	446	// check that the lhs is zeroed out to the level of rhs
	447	Expression *ifCond = makeOp( "?&?", lhs, makeOp( "?-?", rhs, new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), "1" ) ) ) );
	448	// if not aligned, increment to alignment
	449	Expression *ifExpr = makeOp( "?+=?", lhs->clone(), makeOp( "?-?", rhs->clone(), ifCond->clone() ) );
	450	return makeCond( ifCond, ifExpr );
	451	}
[70a06f6]	452
[9d7b3ea]	453	/// adds an expression to a compound statement
	454	void addExpr( CompoundStmt stmts, Expression expr ) {
	455	stmts->get_kids().push_back( new ExprStmt( noLabels, expr ) );
	456	}
	457
	458	/// adds a statement to a compound statement
	459	void addStmt( CompoundStmt stmts, Statement stmt ) {
	460	stmts->get_kids().push_back( stmt );
	461	}
[70a06f6]	462
[3627356]	463	Declaration LayoutFunctionBuilder::mutate( StructDecl structDecl ) {
[9d7b3ea]	464	// do not generate layout function for "empty" tag structs
	465	if ( structDecl->get_members().empty() ) return structDecl;
	466
	467	// get parameters that can change layout, exiting early if none
	468	std::list< TypeDecl* > otypeParams = takeOtypeOnly( structDecl->get_parameters() );
	469	if ( otypeParams.empty() ) return structDecl;
	470
	471	// build layout function signature
	472	FunctionType *layoutFnType = new FunctionType( Type::Qualifiers(), false );
	473	BasicType *sizeAlignType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	474	PointerType *sizeAlignOutType = new PointerType( Type::Qualifiers(), sizeAlignType );
[70a06f6]	475
[adc6781]	476	ObjectDecl *sizeParam = new ObjectDecl( sizeofName( structDecl->get_name() ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType, 0 );
[9d7b3ea]	477	layoutFnType->get_parameters().push_back( sizeParam );
[adc6781]	478	ObjectDecl *alignParam = new ObjectDecl( alignofName( structDecl->get_name() ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType->clone(), 0 );
[9d7b3ea]	479	layoutFnType->get_parameters().push_back( alignParam );
[adc6781]	480	ObjectDecl *offsetParam = new ObjectDecl( offsetofName( structDecl->get_name() ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType->clone(), 0 );
[9d7b3ea]	481	layoutFnType->get_parameters().push_back( offsetParam );
	482	addOtypeParams( layoutFnType, otypeParams );
	483
	484	// build function decl
[adc6781]	485	FunctionDecl *layoutDecl = buildLayoutFunctionDecl( structDecl, functionNesting, layoutFnType );
[9d7b3ea]	486
	487	// calculate struct layout in function body
	488
	489	// initialize size and alignment to 0 and 1 (will have at least one member to re-edit size
	490	addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( sizeParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "0" ) ) ) );
	491	addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( alignParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "1" ) ) ) );
	492	unsigned long n_members = 0;
	493	bool firstMember = true;
	494	for ( std::list< Declaration* >::const_iterator member = structDecl->get_members().begin(); member != structDecl->get_members().end(); ++member ) {
	495	DeclarationWithType dwt = dynamic_cast< DeclarationWithType >( *member );
	496	assert( dwt );
[bd91e2a]	497	Type *memberType = dwt->get_type();
[9d7b3ea]	498
	499	if ( firstMember ) {
	500	firstMember = false;
	501	} else {
	502	// make sure all members after the first (automatically aligned at 0) are properly padded for alignment
[bd91e2a]	503	addStmt( layoutDecl->get_statements(), makeAlignTo( derefVar( sizeParam ), new AlignofExpr( memberType->clone() ) ) );
[9d7b3ea]	504	}
[70a06f6]	505
[9d7b3ea]	506	// place current size in the current offset index
[cb4c607]	507	addExpr( layoutDecl->get_statements(), makeOp( "?=?", makeOp( "?[?]", new VariableExpr( offsetParam ), new ConstantExpr( Constant::from_ulong( n_members ) ) ),
[9d7b3ea]	508	derefVar( sizeParam ) ) );
	509	++n_members;
	510
	511	// add member size to current size
[bd91e2a]	512	addExpr( layoutDecl->get_statements(), makeOp( "?+=?", derefVar( sizeParam ), new SizeofExpr( memberType->clone() ) ) );
[70a06f6]	513
[9d7b3ea]	514	// take max of member alignment and global alignment
[bd91e2a]	515	addStmt( layoutDecl->get_statements(), makeAssignMax( derefVar( alignParam ), new AlignofExpr( memberType->clone() ) ) );
[9d7b3ea]	516	}
	517	// make sure the type is end-padded to a multiple of its alignment
	518	addStmt( layoutDecl->get_statements(), makeAlignTo( derefVar( sizeParam ), derefVar( alignParam ) ) );
	519
	520	addDeclarationAfter( layoutDecl );
	521	return structDecl;
	522	}
[70a06f6]	523
[3627356]	524	Declaration LayoutFunctionBuilder::mutate( UnionDecl unionDecl ) {
[9d7b3ea]	525	// do not generate layout function for "empty" tag unions
	526	if ( unionDecl->get_members().empty() ) return unionDecl;
[70a06f6]	527
[9d7b3ea]	528	// get parameters that can change layout, exiting early if none
	529	std::list< TypeDecl* > otypeParams = takeOtypeOnly( unionDecl->get_parameters() );
	530	if ( otypeParams.empty() ) return unionDecl;
	531
	532	// build layout function signature
	533	FunctionType *layoutFnType = new FunctionType( Type::Qualifiers(), false );
	534	BasicType *sizeAlignType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	535	PointerType *sizeAlignOutType = new PointerType( Type::Qualifiers(), sizeAlignType );
[70a06f6]	536
[adc6781]	537	ObjectDecl *sizeParam = new ObjectDecl( sizeofName( unionDecl->get_name() ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType, 0 );
[9d7b3ea]	538	layoutFnType->get_parameters().push_back( sizeParam );
[adc6781]	539	ObjectDecl *alignParam = new ObjectDecl( alignofName( unionDecl->get_name() ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType->clone(), 0 );
[9d7b3ea]	540	layoutFnType->get_parameters().push_back( alignParam );
	541	addOtypeParams( layoutFnType, otypeParams );
	542
	543	// build function decl
[adc6781]	544	FunctionDecl *layoutDecl = buildLayoutFunctionDecl( unionDecl, functionNesting, layoutFnType );
[9d7b3ea]	545
	546	// calculate union layout in function body
	547	addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( sizeParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "1" ) ) ) );
	548	addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( alignParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "1" ) ) ) );
	549	for ( std::list< Declaration* >::const_iterator member = unionDecl->get_members().begin(); member != unionDecl->get_members().end(); ++member ) {
	550	DeclarationWithType dwt = dynamic_cast< DeclarationWithType >( *member );
	551	assert( dwt );
[bd91e2a]	552	Type *memberType = dwt->get_type();
[70a06f6]	553
[9d7b3ea]	554	// take max member size and global size
[bd91e2a]	555	addStmt( layoutDecl->get_statements(), makeAssignMax( derefVar( sizeParam ), new SizeofExpr( memberType->clone() ) ) );
[70a06f6]	556
[9d7b3ea]	557	// take max of member alignment and global alignment
[bd91e2a]	558	addStmt( layoutDecl->get_statements(), makeAssignMax( derefVar( alignParam ), new AlignofExpr( memberType->clone() ) ) );
[9d7b3ea]	559	}
	560	// make sure the type is end-padded to a multiple of its alignment
	561	addStmt( layoutDecl->get_statements(), makeAlignTo( derefVar( sizeParam ), derefVar( alignParam ) ) );
	562
	563	addDeclarationAfter( layoutDecl );
	564	return unionDecl;
	565	}
[70a06f6]	566
[01aeade]	567	////////////////////////////////////////// Pass1 ////////////////////////////////////////////////////
	568
	569	namespace {
[bdf1954]	570	std::string makePolyMonoSuffix( FunctionType * function, const TyVarMap &tyVars ) {
	571	std::stringstream name;
	572
[ed1065c]	573	// NOTE: this function previously used isPolyObj, which failed to produce
	574	// the correct thing in some situations. It's not clear to me why this wasn't working.
	575
[ae63a18]	576	// if the return type or a parameter type involved polymorphic types, then the adapter will need
	577	// to take those polymorphic types as pointers. Therefore, there can be two different functions
[bdf1954]	578	// with the same mangled name, so we need to further mangle the names.
[ed1065c]	579	for ( std::list< DeclarationWithType *>::iterator retval = function->get_returnVals().begin(); retval != function->get_returnVals().end(); ++retval ) {
[ffad73a]	580	if ( isPolyType( (*retval)->get_type(), tyVars ) ) {
[ed1065c]	581	name << "P";
	582	} else {
	583	name << "M";
	584	}
[bdf1954]	585	}
	586	name << "_";
	587	std::list< DeclarationWithType *> &paramList = function->get_parameters();
	588	for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) {
[ffad73a]	589	if ( isPolyType( (*arg)->get_type(), tyVars ) ) {
[bdf1954]	590	name << "P";
	591	} else {
[ae63a18]	592	name << "M";
[bdf1954]	593	}
	594	} // for
	595	return name.str();
	596	}
	597
	598	std::string mangleAdapterName( FunctionType * function, const TyVarMap &tyVars ) {
	599	return SymTab::Mangler::mangle( function ) + makePolyMonoSuffix( function, tyVars );
	600	}
	601
[01aeade]	602	std::string makeAdapterName( const std::string &mangleName ) {
	603	return "_adapter" + mangleName;
	604	}
[6c3744e]	605
[6635c74]	606	Pass1::Pass1() : useRetval( false ), tempNamer( "_temp" ) {}
[01aeade]	607
[c2ad3c9]	608	/// Returns T if the given declaration is a function with parameter (T*) for some TypeInstType T, NULL otherwise
	609	TypeInstType isTypeInstPtrFn( DeclarationWithType decl ) {
	610	if ( FunctionType *funType = getFunctionType( decl->get_type() ) ) {
	611	if ( funType->get_parameters().size() == 1 ) {
	612	if ( PointerType pointer = dynamic_cast< PointerType >( funType->get_parameters().front()->get_type() ) ) {
	613	if ( TypeInstType refType = dynamic_cast< TypeInstType >( pointer->get_base() ) ) {
	614	return refType;
	615	} // if
	616	} // if
	617	} // if
	618	} // if
	619	return 0;
	620	}
	621
	622	/// Returns T if the given declaration is a function with parameters (T*, T) for some TypeInstType T, NULL otherwise
	623	TypeInstType isTypeInstPtrValFn( DeclarationWithType decl ) {
	624	if ( FunctionType *funType = getFunctionType( decl->get_type() ) ) {
	625	if ( funType->get_parameters().size() == 2 ) {
	626	if ( PointerType pointer = dynamic_cast< PointerType >( funType->get_parameters().front()->get_type() ) ) {
	627	if ( TypeInstType refType = dynamic_cast< TypeInstType >( pointer->get_base() ) ) {
	628	if ( TypeInstType refType2 = dynamic_cast< TypeInstType >( funType->get_parameters().back()->get_type() ) ) {
	629	if ( refType->get_name() == refType2->get_name() ) {
	630	return refType;
[01aeade]	631	} // if
	632	} // if
	633	} // if
	634	} // if
	635	} // if
	636	} // if
[1194734]	637	return 0;
[01aeade]	638	}
[c2ad3c9]	639
	640	/// Returns T if the given declaration is (?=?)(T , T) for some TypeInstType T (return not checked, but maybe should be), NULL otherwise
	641	TypeInstType isTypeInstAssignment( DeclarationWithType decl ) {
	642	return decl->get_name() == "?=?" ? isTypeInstPtrValFn( decl ) : 0;
	643	}
[70a06f6]	644
[c2ad3c9]	645	/// Returns T if the given declaration is (?{})(T ) for some TypeInstType T (return not checked, but maybe should be), NULL otherwise
	646	TypeInstType isTypeInstCtor( DeclarationWithType decl ) {
	647	return decl->get_name() == "?{}" ? isTypeInstPtrFn( decl ) : 0;
	648	}
	649
	650	/// Returns T if the given declaration is (?{})(T , T) for some TypeInstType T (return not checked, but maybe should be), NULL otherwise
	651	TypeInstType isTypeInstCopy( DeclarationWithType decl ) {
	652	return decl->get_name() == "?{}" ? isTypeInstPtrValFn( decl ) : 0;
	653	}
	654
	655	/// Returns T if the given declaration is (^?{})(T ) for some TypeInstType T (return not checked, but maybe should be), NULL otherwise
	656	TypeInstType isTypeInstDtor( DeclarationWithType decl ) {
	657	return decl->get_name() == "^?{}" ? isTypeInstPtrFn( decl ) : 0;
	658	}
	659
	660	/// Returns T if the given declaration is a function with parameters (T*, T) for some type T, where neither parameter is cv-qualified,
	661	/// NULL otherwise
	662	Type isNoCvPtrFn( DeclarationWithType decl ) {
	663	if ( FunctionType *funType = getFunctionType( decl->get_type() ) ) {
	664	if ( funType->get_parameters().size() == 1 ) {
	665	Type::Qualifiers defaultQualifiers;
	666	Type *paramType = funType->get_parameters().front()->get_type();
	667	if ( paramType->get_qualifiers() != defaultQualifiers ) return 0;
	668
	669	if ( PointerType pointerType = dynamic_cast< PointerType >( paramType ) ) {
	670	Type *baseType = pointerType->get_base();
	671	if ( baseType->get_qualifiers() == defaultQualifiers ) {
	672	return baseType;
	673	} // if
	674	} // if
	675	} // if
	676	} // if
	677	return 0;
	678	}
	679
	680	/// Returns T if the given declaration is a function with parameters (T*, T) for some type T, where neither parameter is cv-qualified,
	681	/// NULL otherwise
	682	Type isNoCvPtrValFn( DeclarationWithType decl ) {
	683	if ( FunctionType *funType = getFunctionType( decl->get_type() ) ) {
	684	if ( funType->get_parameters().size() == 2 ) {
	685	Type::Qualifiers defaultQualifiers;
	686	Type *paramType1 = funType->get_parameters().front()->get_type();
	687	if ( paramType1->get_qualifiers() != defaultQualifiers ) return 0;
	688	Type *paramType2 = funType->get_parameters().back()->get_type();
	689	if ( paramType2->get_qualifiers() != defaultQualifiers ) return 0;
	690
	691	if ( PointerType pointerType = dynamic_cast< PointerType >( paramType1 ) ) {
	692	Type *baseType1 = pointerType->get_base();
	693	if ( baseType1->get_qualifiers() != defaultQualifiers ) return 0;
	694	SymTab::Indexer dummy;
	695	if ( ResolvExpr::typesCompatible( baseType1, paramType2, dummy ) ) {
	696	return baseType1;
[dc12481]	697	} // if
	698	} // if
	699	} // if
	700	} // if
	701	return 0;
	702	}
[01aeade]	703
[c2ad3c9]	704	/// returns T if the given declaration is: (?=?)(T , T) for some type T (return not checked, but maybe should be), NULL otherwise
	705	/// Only picks assignments where neither parameter is cv-qualified
	706	Type isAssignment( DeclarationWithType decl ) {
	707	return decl->get_name() == "?=?" ? isNoCvPtrValFn( decl ) : 0;
	708	}
	709
	710	/// returns T if the given declaration is: (?{})(T ) for some type T, NULL otherwise
	711	/// Only picks ctors where the parameter is not cv-qualified
	712	Type isCtor( DeclarationWithType decl ) {
	713	return decl->get_name() == "?{}" ? isNoCvPtrFn( decl ) : 0;
	714	}
	715
	716	/// returns T if the given declaration is: (?{})(T , T) for some type T (return not checked, but maybe should be), NULL otherwise
	717	/// Only picks copy constructors where neither parameter is cv-qualified
	718	Type isCopy( DeclarationWithType decl ) {
	719	return decl->get_name() == "?{}" ? isNoCvPtrValFn( decl ) : 0;
	720	}
	721
	722	/// returns T if the given declaration is: (?{})(T ) for some type T, NULL otherwise
	723	/// Only picks ctors where the parameter is not cv-qualified
	724	Type isDtor( DeclarationWithType decl ) {
	725	return decl->get_name() == "^?{}" ? isNoCvPtrFn( decl ) : 0;
	726	}
	727
	728	void Pass1::findTypeOps( const std::list< TypeDecl *> &forall ) {
[ed1065c]	729	// what if a nested function uses an assignment operator?
	730	// assignOps.clear();
[01aeade]	731	for ( std::list< TypeDecl *>::const_iterator i = forall.begin(); i != forall.end(); ++i ) {
	732	for ( std::list< DeclarationWithType >::const_iterator assert = (i)->get_assertions().begin(); assert != (*i)->get_assertions().end(); ++assert ) {
	733	std::string typeName;
[dc12481]	734	if ( TypeInstType typeInst = isTypeInstAssignment( assert ) ) {
[1194734]	735	assignOps[ typeInst->get_name() ] = *assert;
[c2ad3c9]	736	} else if ( TypeInstType typeInst = isTypeInstCtor( assert ) ) {
	737	ctorOps[ typeInst->get_name() ] = *assert;
	738	} else if ( TypeInstType typeInst = isTypeInstCopy( assert ) ) {
	739	copyOps[ typeInst->get_name() ] = *assert;
	740	} else if ( TypeInstType typeInst = isTypeInstDtor( assert ) ) {
	741	dtorOps[ typeInst->get_name() ] = *assert;
[01aeade]	742	} // if
	743	} // for
	744	} // for
	745	}
	746
[82dd287]	747	DeclarationWithType Pass1::mutate( FunctionDecl functionDecl ) {
[89173242]	748	// if this is a assignment function, put it in the map for this scope
[c2ad3c9]	749	if ( Type *paramType = isAssignment( functionDecl ) ) {
	750	if ( ! dynamic_cast< TypeInstType* >( paramType ) ) {
	751	scopedAssignOps.insert( paramType, functionDecl );
	752	}
	753	} else if ( Type *paramType = isCtor( functionDecl ) ) {
	754	if ( ! dynamic_cast< TypeInstType* >( paramType ) ) {
	755	scopedCtorOps.insert( paramType, functionDecl );
	756	}
	757	} else if ( Type *paramType = isCopy( functionDecl ) ) {
	758	if ( ! dynamic_cast< TypeInstType* >( paramType ) ) {
	759	scopedCopyOps.insert( paramType, functionDecl );
	760	}
	761	} else if ( Type *paramType = isDtor( functionDecl ) ) {
	762	if ( ! dynamic_cast< TypeInstType* >( paramType ) ) {
	763	scopedDtorOps.insert( paramType, functionDecl );
[1194734]	764	}
	765	}
[b4cd03b7]	766
[e56cfdb0]	767	if ( functionDecl->get_statements() ) { // empty routine body ?
	768	doBeginScope();
[4b8f918]	769	scopeTyVars.beginScope();
[63c0dbf]	770	assignOps.beginScope();
[c2ad3c9]	771	ctorOps.beginScope();
	772	copyOps.beginScope();
	773	dtorOps.beginScope();
	774
[01aeade]	775	DeclarationWithType *oldRetval = retval;
	776	bool oldUseRetval = useRetval;
[e56cfdb0]	777
	778	// process polymorphic return value
[01aeade]	779	retval = 0;
[aadc9a4]	780	if ( isPolyRet( functionDecl->get_functionType() ) && functionDecl->get_linkage() == LinkageSpec::Cforall ) {
[01aeade]	781	retval = functionDecl->get_functionType()->get_returnVals().front();
[ae63a18]	782
[01aeade]	783	// give names to unnamed return values
	784	if ( retval->get_name() == "" ) {
	785	retval->set_name( "_retparm" );
	786	retval->set_linkage( LinkageSpec::C );
	787	} // if
	788	} // if
[ae63a18]	789
[e56cfdb0]	790	FunctionType *functionType = functionDecl->get_functionType();
[01aeade]	791	makeTyVarMap( functionDecl->get_functionType(), scopeTyVars );
[c2ad3c9]	792	findTypeOps( functionDecl->get_functionType()->get_forall() );
[e56cfdb0]	793
	794	std::list< DeclarationWithType *> &paramList = functionType->get_parameters();
	795	std::list< FunctionType *> functions;
	796	for ( std::list< TypeDecl *>::iterator tyVar = functionType->get_forall().begin(); tyVar != functionType->get_forall().end(); ++tyVar ) {
	797	for ( std::list< DeclarationWithType >::iterator assert = (tyVar)->get_assertions().begin(); assert != (*tyVar)->get_assertions().end(); ++assert ) {
	798	findFunction( (*assert)->get_type(), functions, scopeTyVars, needsAdapter );
	799	} // for
	800	} // for
	801	for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) {
	802	findFunction( (*arg)->get_type(), functions, scopeTyVars, needsAdapter );
	803	} // for
[b4cd03b7]	804
[e56cfdb0]	805	for ( std::list< FunctionType *>::iterator funType = functions.begin(); funType != functions.end(); ++funType ) {
[bdf1954]	806	std::string mangleName = mangleAdapterName( *funType, scopeTyVars );
[e56cfdb0]	807	if ( adapters.find( mangleName ) == adapters.end() ) {
	808	std::string adapterName = makeAdapterName( mangleName );
	809	adapters.insert( std::pair< std::string, DeclarationWithType >( mangleName, new ObjectDecl( adapterName, DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new PointerType( Type::Qualifiers(), makeAdapterType( funType, scopeTyVars ) ), 0 ) ) );
	810	} // if
	811	} // for
	812
[01aeade]	813	functionDecl->set_statements( functionDecl->get_statements()->acceptMutator( *this ) );
[ae63a18]	814
[6f49cdf]	815	scopeTyVars.endScope();
[63c0dbf]	816	assignOps.endScope();
[c2ad3c9]	817	ctorOps.endScope();
	818	copyOps.endScope();
	819	dtorOps.endScope();
[01aeade]	820	retval = oldRetval;
	821	useRetval = oldUseRetval;
[e56cfdb0]	822	doEndScope();
[01aeade]	823	} // if
	824	return functionDecl;
	825	}
[6c3744e]	826
[01aeade]	827	TypeDecl Pass1::mutate( TypeDecl typeDecl ) {
	828	scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind();
	829	return Mutator::mutate( typeDecl );
	830	}
[6c3744e]	831
[01aeade]	832	Expression Pass1::mutate( CommaExpr commaExpr ) {
	833	bool oldUseRetval = useRetval;
	834	useRetval = false;
	835	commaExpr->set_arg1( maybeMutate( commaExpr->get_arg1(), *this ) );
	836	useRetval = oldUseRetval;
	837	commaExpr->set_arg2( maybeMutate( commaExpr->get_arg2(), *this ) );
	838	return commaExpr;
	839	}
[6c3744e]	840
[01aeade]	841	Expression Pass1::mutate( ConditionalExpr condExpr ) {
	842	bool oldUseRetval = useRetval;
	843	useRetval = false;
	844	condExpr->set_arg1( maybeMutate( condExpr->get_arg1(), *this ) );
	845	useRetval = oldUseRetval;
	846	condExpr->set_arg2( maybeMutate( condExpr->get_arg2(), *this ) );
	847	condExpr->set_arg3( maybeMutate( condExpr->get_arg3(), *this ) );
	848	return condExpr;
[6c3744e]	849
[01aeade]	850	}
[6c3744e]	851
[5c52b06]	852	void Pass1::passArgTypeVars( ApplicationExpr appExpr, Type parmType, Type argBaseType, std::list< Expression >::iterator &arg, const TyVarMap &exprTyVars, std::set< std::string > &seenTypes ) {
[4b8f918]	853	Type *polyType = isPolyType( parmType, exprTyVars );
	854	if ( polyType && ! dynamic_cast< TypeInstType* >( polyType ) ) {
	855	std::string typeName = mangleType( polyType );
[adc6781]	856	if ( seenTypes.count( typeName ) ) return;
[5c52b06]	857
	858	arg = appExpr->get_args().insert( arg, new SizeofExpr( argBaseType->clone() ) );
	859	arg++;
	860	arg = appExpr->get_args().insert( arg, new AlignofExpr( argBaseType->clone() ) );
	861	arg++;
[4b8f918]	862	if ( dynamic_cast< StructInstType* >( polyType ) ) {
[5c52b06]	863	if ( StructInstType argBaseStructType = dynamic_cast< StructInstType >( argBaseType ) ) {
[89173242]	864	// zero-length arrays are forbidden by C, so don't pass offset for empty struct
	865	if ( ! argBaseStructType->get_baseStruct()->get_members().empty() ) {
[d75038c]	866	arg = appExpr->get_args().insert( arg, new OffsetPackExpr( argBaseStructType->clone() ) );
[89173242]	867	arg++;
	868	}
[5c52b06]	869	} else {
	870	throw SemanticError( "Cannot pass non-struct type for generic struct" );
	871	}
	872	}
	873
[adc6781]	874	seenTypes.insert( typeName );
[5c52b06]	875	}
	876	}
	877
	878	void Pass1::passTypeVars( ApplicationExpr appExpr, ReferenceToType polyRetType, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars ) {
[7754cde]	879	// pass size/align for type variables
[01aeade]	880	for ( TyVarMap::const_iterator tyParm = exprTyVars.begin(); tyParm != exprTyVars.end(); ++tyParm ) {
	881	ResolvExpr::EqvClass eqvClass;
	882	assert( env );
	883	if ( tyParm->second == TypeDecl::Any ) {
	884	Type *concrete = env->lookup( tyParm->first );
	885	if ( concrete ) {
	886	arg = appExpr->get_args().insert( arg, new SizeofExpr( concrete->clone() ) );
	887	arg++;
[db0b3ce]	888	arg = appExpr->get_args().insert( arg, new AlignofExpr( concrete->clone() ) );
	889	arg++;
[01aeade]	890	} else {
[dc2e7e0]	891	/// xxx - should this be an assertion?
[540de412]	892	throw SemanticError( "unbound type variable: " + tyParm->first + " in application ", appExpr );
[01aeade]	893	} // if
	894	} // if
	895	} // for
[7754cde]	896
	897	// add size/align for generic types to parameter list
	898	if ( appExpr->get_function()->get_results().empty() ) return;
	899	FunctionType *funcType = getFunctionType( appExpr->get_function()->get_results().front() );
	900	assert( funcType );
[ae63a18]	901
[7754cde]	902	std::list< DeclarationWithType* >::const_iterator fnParm = funcType->get_parameters().begin();
	903	std::list< Expression* >::const_iterator fnArg = arg;
[69911c11]	904	std::set< std::string > seenTypes; //< names for generic types we've seen
[7754cde]	905
[5c52b06]	906	// a polymorphic return type may need to be added to the argument list
	907	if ( polyRetType ) {
	908	Type *concRetType = replaceWithConcrete( appExpr, polyRetType );
	909	passArgTypeVars( appExpr, polyRetType, concRetType, arg, exprTyVars, seenTypes );
	910	}
[70a06f6]	911
[5c52b06]	912	// add type information args for presently unseen types in parameter list
	913	for ( ; fnParm != funcType->get_parameters().end() && fnArg != appExpr->get_args().end(); ++fnParm, ++fnArg ) {
	914	VariableExpr fnArgBase = getBaseVar( fnArg );
	915	if ( ! fnArgBase \|\| fnArgBase->get_results().empty() ) continue;
	916	passArgTypeVars( appExpr, (*fnParm)->get_type(), fnArgBase->get_results().front(), arg, exprTyVars, seenTypes );
[7754cde]	917	}
[01aeade]	918	}
[6c3744e]	919
[01aeade]	920	ObjectDecl Pass1::makeTemporary( Type type ) {
[68cd1ce]	921	ObjectDecl *newObj = new ObjectDecl( tempNamer.newName(), DeclarationNode::NoStorageClass, LinkageSpec::C, 0, type, 0 );
[01aeade]	922	stmtsToAdd.push_back( new DeclStmt( noLabels, newObj ) );
	923	return newObj;
	924	}
[6c3744e]	925
[01aeade]	926	Expression Pass1::addRetParam( ApplicationExpr appExpr, FunctionType function, Type retType, std::list< Expression *>::iterator &arg ) {
[cf16f94]	927	// *** Code Removal *** After introducing a temporary variable for all return expressions, the following code appears superfluous.
	928	// if ( useRetval ) {
	929	// assert( retval );
	930	// arg = appExpr->get_args().insert( arg, new VariableExpr( retval ) );
	931	// arg++;
	932	// } else {
	933
	934	// Create temporary to hold return value of polymorphic function and produce that temporary as a result
	935	// using a comma expression. Possibly change comma expression into statement expression "{}" for multiple
	936	// return values.
	937	ObjectDecl *newObj = makeTemporary( retType->clone() );
	938	Expression *paramExpr = new VariableExpr( newObj );
[5c52b06]	939
	940	// If the type of the temporary is not polymorphic, box temporary by taking its address;
	941	// otherwise the temporary is already boxed and can be used directly.
[5f6c42c]	942	if ( ! isPolyType( newObj->get_type(), scopeTyVars, env ) ) {
[cf16f94]	943	paramExpr = new AddressExpr( paramExpr );
[01aeade]	944	} // if
[cf16f94]	945	arg = appExpr->get_args().insert( arg, paramExpr ); // add argument to function call
	946	arg++;
	947	// Build a comma expression to call the function and emulate a normal return.
	948	CommaExpr *commaExpr = new CommaExpr( appExpr, new VariableExpr( newObj ) );
	949	commaExpr->set_env( appExpr->get_env() );
	950	appExpr->set_env( 0 );
	951	return commaExpr;
	952	// } // if
	953	// return appExpr;
[01aeade]	954	}
[6c3744e]	955
[48ca586]	956	void Pass1::replaceParametersWithConcrete( ApplicationExpr appExpr, std::list< Expression >& params ) {
	957	for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
	958	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
	959	assert(paramType && "Aggregate parameters should be type expressions");
	960	paramType->set_type( replaceWithConcrete( appExpr, paramType->get_type(), false ) );
	961	}
	962	}
[b4cd03b7]	963
[48ca586]	964	Type Pass1::replaceWithConcrete( ApplicationExpr appExpr, Type *type, bool doClone ) {
	965	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( type ) ) {
	966	Type *concrete = env->lookup( typeInst->get_name() );
	967	if ( concrete == 0 ) {
	968	throw SemanticError( "Unbound type variable " + typeInst->get_name() + " in ", appExpr );
	969	} // if
	970	return concrete;
	971	} else if ( StructInstType structType = dynamic_cast< StructInstType >( type ) ) {
	972	if ( doClone ) {
	973	structType = structType->clone();
	974	}
	975	replaceParametersWithConcrete( appExpr, structType->get_parameters() );
	976	return structType;
	977	} else if ( UnionInstType unionType = dynamic_cast< UnionInstType >( type ) ) {
	978	if ( doClone ) {
	979	unionType = unionType->clone();
	980	}
	981	replaceParametersWithConcrete( appExpr, unionType->get_parameters() );
	982	return unionType;
	983	}
	984	return type;
	985	}
	986
	987	Expression Pass1::addPolyRetParam( ApplicationExpr appExpr, FunctionType function, ReferenceToType polyType, std::list< Expression *>::iterator &arg ) {
[01aeade]	988	assert( env );
[48ca586]	989	Type *concrete = replaceWithConcrete( appExpr, polyType );
[70a06f6]	990	// add out-parameter for return value
[01aeade]	991	return addRetParam( appExpr, function, concrete, arg );
	992	}
[6c3744e]	993
[01aeade]	994	Expression Pass1::applyAdapter( ApplicationExpr appExpr, FunctionType function, std::list< Expression >::iterator &arg, const TyVarMap &tyVars ) {
	995	Expression *ret = appExpr;
[ffad73a]	996	if ( ! function->get_returnVals().empty() && isPolyType( function->get_returnVals().front()->get_type(), tyVars ) ) {
[01aeade]	997	ret = addRetParam( appExpr, function, function->get_returnVals().front()->get_type(), arg );
	998	} // if
[bdf1954]	999	std::string mangleName = mangleAdapterName( function, tyVars );
[01aeade]	1000	std::string adapterName = makeAdapterName( mangleName );
[b1a6d6b]	1001
[b4cd03b7]	1002	// cast adaptee to void (*)(), since it may have any type inside a polymorphic function
	1003	Type * adapteeType = new PointerType( Type::Qualifiers(), new FunctionType( Type::Qualifiers(), true ) );
	1004	appExpr->get_args().push_front( new CastExpr( appExpr->get_function(), adapteeType ) );
[01aeade]	1005	appExpr->set_function( new NameExpr( adapterName ) );
[ae63a18]	1006
[01aeade]	1007	return ret;
	1008	}
[6c3744e]	1009
[01aeade]	1010	void Pass1::boxParam( Type param, Expression &arg, const TyVarMap &exprTyVars ) {
	1011	assert( ! arg->get_results().empty() );
[1cced28]	1012	if ( isPolyType( param, exprTyVars ) ) {
[9407ed8]	1013	if ( isPolyType( arg->get_results().front() ) ) {
	1014	// if the argument's type is polymorphic, we don't need to box again!
[01aeade]	1015	return;
	1016	} else if ( arg->get_results().front()->get_isLvalue() ) {
[b3ab8f0]	1017	// VariableExpr and MemberExpr are lvalues; need to check this isn't coming from the second arg of a comma expression though (not an lvalue)
[fea7ca7]	1018	// xxx - need to test that this code is still reachable
[b3ab8f0]	1019	if ( CommaExpr commaArg = dynamic_cast< CommaExpr >( arg ) ) {
[bc1ab61]	1020	commaArg->set_arg2( new AddressExpr( commaArg->get_arg2() ) );
[b3ab8f0]	1021	} else {
	1022	arg = new AddressExpr( arg );
	1023	}
[01aeade]	1024	} else {
[bd85400]	1025	// use type computed in unification to declare boxed variables
	1026	Type * newType = param->clone();
	1027	if ( env ) env->apply( newType );
	1028	ObjectDecl *newObj = new ObjectDecl( tempNamer.newName(), DeclarationNode::NoStorageClass, LinkageSpec::C, 0, newType, 0 );
[f6d7e0f]	1029	newObj->get_type()->get_qualifiers() = Type::Qualifiers(); // TODO: is this right???
[01aeade]	1030	stmtsToAdd.push_back( new DeclStmt( noLabels, newObj ) );
	1031	UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );
	1032	assign->get_args().push_back( new VariableExpr( newObj ) );
	1033	assign->get_args().push_back( arg );
	1034	stmtsToAdd.push_back( new ExprStmt( noLabels, assign ) );
	1035	arg = new AddressExpr( new VariableExpr( newObj ) );
	1036	} // if
	1037	} // if
	1038	}
[6c3744e]	1039
[b4cd03b7]	1040	/// cast parameters to polymorphic functions so that types are replaced with
	1041	/// void * if they are type parameters in the formal type.
	1042	/// this gets rid of warnings from gcc.
[01aeade]	1043	void addCast( Expression &actual, Type formal, const TyVarMap &tyVars ) {
[b4cd03b7]	1044	Type * newType = formal->clone();
	1045	if ( getFunctionType( newType ) ) {
	1046	newType = ScrubTyVars::scrub( newType, tyVars );
[01aeade]	1047	actual = new CastExpr( actual, newType );
	1048	} // if
	1049	}
[6c3744e]	1050
[01aeade]	1051	void Pass1::boxParams( ApplicationExpr appExpr, FunctionType function, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars ) {
	1052	for ( std::list< DeclarationWithType *>::const_iterator param = function->get_parameters().begin(); param != function->get_parameters().end(); ++param, ++arg ) {
	1053	assert( arg != appExpr->get_args().end() );
	1054	addCast( arg, (param)->get_type(), exprTyVars );
	1055	boxParam( (param)->get_type(), arg, exprTyVars );
	1056	} // for
	1057	}
[6c3744e]	1058
[01aeade]	1059	void Pass1::addInferredParams( ApplicationExpr appExpr, FunctionType functionType, std::list< Expression *>::iterator &arg, const TyVarMap &tyVars ) {
	1060	std::list< Expression *>::iterator cur = arg;
	1061	for ( std::list< TypeDecl *>::iterator tyVar = functionType->get_forall().begin(); tyVar != functionType->get_forall().end(); ++tyVar ) {
	1062	for ( std::list< DeclarationWithType >::iterator assert = (tyVar)->get_assertions().begin(); assert != (*tyVar)->get_assertions().end(); ++assert ) {
	1063	InferredParams::const_iterator inferParam = appExpr->get_inferParams().find( (*assert)->get_uniqueId() );
[698664b3]	1064	assert( inferParam != appExpr->get_inferParams().end() && "NOTE: Explicit casts of polymorphic functions to compatible monomorphic functions are currently unsupported" );
[01aeade]	1065	Expression *newExpr = inferParam->second.expr->clone();
	1066	addCast( newExpr, (*assert)->get_type(), tyVars );
	1067	boxParam( (*assert)->get_type(), newExpr, tyVars );
	1068	appExpr->get_args().insert( cur, newExpr );
	1069	} // for
	1070	} // for
	1071	}
[6c3744e]	1072
[01aeade]	1073	void makeRetParm( FunctionType *funcType ) {
	1074	DeclarationWithType *retParm = funcType->get_returnVals().front();
[6c3744e]	1075
[01aeade]	1076	// make a new parameter that is a pointer to the type of the old return value
	1077	retParm->set_type( new PointerType( Type::Qualifiers(), retParm->get_type() ) );
	1078	funcType->get_parameters().push_front( retParm );
[6c3744e]	1079
[01aeade]	1080	// we don't need the return value any more
	1081	funcType->get_returnVals().clear();
	1082	}
[6c3744e]	1083
[01aeade]	1084	FunctionType makeAdapterType( FunctionType adaptee, const TyVarMap &tyVars ) {
	1085	// actually make the adapter type
	1086	FunctionType *adapter = adaptee->clone();
[ffad73a]	1087	if ( ! adapter->get_returnVals().empty() && isPolyType( adapter->get_returnVals().front()->get_type(), tyVars ) ) {
[01aeade]	1088	makeRetParm( adapter );
	1089	} // if
[68cd1ce]	1090	adapter->get_parameters().push_front( new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new PointerType( Type::Qualifiers(), new FunctionType( Type::Qualifiers(), true ) ), 0 ) );
[01aeade]	1091	return adapter;
	1092	}
[6c3744e]	1093
[01aeade]	1094	Expression makeAdapterArg( DeclarationWithType param, DeclarationWithType arg, DeclarationWithType realParam, const TyVarMap &tyVars ) {
	1095	assert( param );
	1096	assert( arg );
[ffad73a]	1097	if ( isPolyType( realParam->get_type(), tyVars ) ) {
[30aeb27]	1098	if ( ! isPolyType( arg->get_type() ) ) {
[e56cfdb0]	1099	UntypedExpr deref = new UntypedExpr( new NameExpr( "?" ) );
	1100	deref->get_args().push_back( new CastExpr( new VariableExpr( param ), new PointerType( Type::Qualifiers(), arg->get_type()->clone() ) ) );
	1101	deref->get_results().push_back( arg->get_type()->clone() );
	1102	return deref;
	1103	} // if
[01aeade]	1104	} // if
	1105	return new VariableExpr( param );
	1106	}
[6c3744e]	1107
[01aeade]	1108	void addAdapterParams( ApplicationExpr adapteeApp, std::list< DeclarationWithType >::iterator arg, std::list< DeclarationWithType >::iterator param, std::list< DeclarationWithType >::iterator paramEnd, std::list< DeclarationWithType *>::iterator realParam, const TyVarMap &tyVars ) {
	1109	UniqueName paramNamer( "_p" );
	1110	for ( ; param != paramEnd; ++param, ++arg, ++realParam ) {
	1111	if ( (*param)->get_name() == "" ) {
	1112	(*param)->set_name( paramNamer.newName() );
	1113	(*param)->set_linkage( LinkageSpec::C );
	1114	} // if
	1115	adapteeApp->get_args().push_back( makeAdapterArg( param, arg, *realParam, tyVars ) );
	1116	} // for
	1117	}
[6c3744e]	1118
[01aeade]	1119	FunctionDecl Pass1::makeAdapter( FunctionType adaptee, FunctionType *realType, const std::string &mangleName, const TyVarMap &tyVars ) {
	1120	FunctionType *adapterType = makeAdapterType( adaptee, tyVars );
	1121	adapterType = ScrubTyVars::scrub( adapterType, tyVars );
	1122	DeclarationWithType *adapteeDecl = adapterType->get_parameters().front();
	1123	adapteeDecl->set_name( "_adaptee" );
	1124	ApplicationExpr *adapteeApp = new ApplicationExpr( new CastExpr( new VariableExpr( adapteeDecl ), new PointerType( Type::Qualifiers(), realType ) ) );
	1125	Statement *bodyStmt;
[ae63a18]	1126
[01aeade]	1127	std::list< TypeDecl *>::iterator tyArg = realType->get_forall().begin();
	1128	std::list< TypeDecl *>::iterator tyParam = adapterType->get_forall().begin();
	1129	std::list< TypeDecl *>::iterator realTyParam = adaptee->get_forall().begin();
	1130	for ( ; tyParam != adapterType->get_forall().end(); ++tyArg, ++tyParam, ++realTyParam ) {
	1131	assert( tyArg != realType->get_forall().end() );
	1132	std::list< DeclarationWithType >::iterator assertArg = (tyArg)->get_assertions().begin();
	1133	std::list< DeclarationWithType >::iterator assertParam = (tyParam)->get_assertions().begin();
	1134	std::list< DeclarationWithType >::iterator realAssertParam = (realTyParam)->get_assertions().begin();
	1135	for ( ; assertParam != (*tyParam)->get_assertions().end(); ++assertArg, ++assertParam, ++realAssertParam ) {
	1136	assert( assertArg != (*tyArg)->get_assertions().end() );
	1137	adapteeApp->get_args().push_back( makeAdapterArg( assertParam, assertArg, *realAssertParam, tyVars ) );
	1138	} // for
	1139	} // for
[ae63a18]	1140
[01aeade]	1141	std::list< DeclarationWithType *>::iterator arg = realType->get_parameters().begin();
	1142	std::list< DeclarationWithType *>::iterator param = adapterType->get_parameters().begin();
	1143	std::list< DeclarationWithType *>::iterator realParam = adaptee->get_parameters().begin();
[cc3528f]	1144	param++; // skip adaptee parameter in the adapter type
[01aeade]	1145	if ( realType->get_returnVals().empty() ) {
[cc3528f]	1146	// void return
[01aeade]	1147	addAdapterParams( adapteeApp, arg, param, adapterType->get_parameters().end(), realParam, tyVars );
	1148	bodyStmt = new ExprStmt( noLabels, adapteeApp );
[ffad73a]	1149	} else if ( isPolyType( adaptee->get_returnVals().front()->get_type(), tyVars ) ) {
[cc3528f]	1150	// return type T
[01aeade]	1151	if ( (*param)->get_name() == "" ) {
	1152	(*param)->set_name( "_ret" );
	1153	(*param)->set_linkage( LinkageSpec::C );
	1154	} // if
	1155	UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );
	1156	UntypedExpr deref = new UntypedExpr( new NameExpr( "?" ) );
	1157	deref->get_args().push_back( new CastExpr( new VariableExpr( *param++ ), new PointerType( Type::Qualifiers(), realType->get_returnVals().front()->get_type()->clone() ) ) );
	1158	assign->get_args().push_back( deref );
	1159	addAdapterParams( adapteeApp, arg, param, adapterType->get_parameters().end(), realParam, tyVars );
	1160	assign->get_args().push_back( adapteeApp );
	1161	bodyStmt = new ExprStmt( noLabels, assign );
	1162	} else {
	1163	// adapter for a function that returns a monomorphic value
	1164	addAdapterParams( adapteeApp, arg, param, adapterType->get_parameters().end(), realParam, tyVars );
	1165	bodyStmt = new ReturnStmt( noLabels, adapteeApp );
	1166	} // if
	1167	CompoundStmt *adapterBody = new CompoundStmt( noLabels );
	1168	adapterBody->get_kids().push_back( bodyStmt );
	1169	std::string adapterName = makeAdapterName( mangleName );
[de62360d]	1170	return new FunctionDecl( adapterName, DeclarationNode::NoStorageClass, LinkageSpec::C, adapterType, adapterBody, false, false );
[01aeade]	1171	}
[6c3744e]	1172
[c29d9ce]	1173	void Pass1::passAdapters( ApplicationExpr * appExpr, FunctionType * functionType, const TyVarMap & exprTyVars ) {
[e497c1d]	1174	// collect a list of function types passed as parameters or implicit parameters (assertions)
[01aeade]	1175	std::list< DeclarationWithType *> &paramList = functionType->get_parameters();
	1176	std::list< FunctionType *> functions;
	1177	for ( std::list< TypeDecl *>::iterator tyVar = functionType->get_forall().begin(); tyVar != functionType->get_forall().end(); ++tyVar ) {
	1178	for ( std::list< DeclarationWithType >::iterator assert = (tyVar)->get_assertions().begin(); assert != (*tyVar)->get_assertions().end(); ++assert ) {
	1179	findFunction( (*assert)->get_type(), functions, exprTyVars, needsAdapter );
	1180	} // for
	1181	} // for
	1182	for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) {
	1183	findFunction( (*arg)->get_type(), functions, exprTyVars, needsAdapter );
	1184	} // for
[e497c1d]	1185
[e56cfdb0]	1186	// parameter function types for which an appropriate adapter has been generated. we cannot use the types
	1187	// after applying substitutions, since two different parameter types may be unified to the same type
[01aeade]	1188	std::set< std::string > adaptersDone;
[e497c1d]	1189
[01aeade]	1190	for ( std::list< FunctionType *>::iterator funType = functions.begin(); funType != functions.end(); ++funType ) {
[c29d9ce]	1191	FunctionType originalFunction = (funType)->clone();
[01aeade]	1192	FunctionType realFunction = (funType)->clone();
	1193	std::string mangleName = SymTab::Mangler::mangle( realFunction );
[e497c1d]	1194
[e56cfdb0]	1195	// only attempt to create an adapter or pass one as a parameter if we haven't already done so for this
	1196	// pre-substitution parameter function type.
[01aeade]	1197	if ( adaptersDone.find( mangleName ) == adaptersDone.end() ) {
[e497c1d]	1198	adaptersDone.insert( adaptersDone.begin(), mangleName );
[ae63a18]	1199
[e56cfdb0]	1200	// apply substitution to type variables to figure out what the adapter's type should look like
[e497c1d]	1201	assert( env );
	1202	env->apply( realFunction );
[ae63a18]	1203	mangleName = SymTab::Mangler::mangle( realFunction );
[bdf1954]	1204	mangleName += makePolyMonoSuffix( originalFunction, exprTyVars );
[e497c1d]	1205
[6635c74]	1206	typedef ScopedMap< std::string, DeclarationWithType* >::iterator AdapterIter;
	1207	AdapterIter adapter = adapters.find( mangleName );
[e56cfdb0]	1208	if ( adapter == adapters.end() ) {
	1209	// adapter has not been created yet in the current scope, so define it
	1210	FunctionDecl newAdapter = makeAdapter( funType, realFunction, mangleName, exprTyVars );
[6635c74]	1211	std::pair< AdapterIter, bool > answer = adapters.insert( std::pair< std::string, DeclarationWithType *>( mangleName, newAdapter ) );
	1212	adapter = answer.first;
[e56cfdb0]	1213	stmtsToAdd.push_back( new DeclStmt( noLabels, newAdapter ) );
[c29d9ce]	1214	} // if
[e56cfdb0]	1215	assert( adapter != adapters.end() );
	1216
	1217	// add the appropriate adapter as a parameter
	1218	appExpr->get_args().push_front( new VariableExpr( adapter->second ) );
[01aeade]	1219	} // if
	1220	} // for
[e56cfdb0]	1221	} // passAdapters
[6c3744e]	1222
[78dd0da]	1223	Expression makeIncrDecrExpr( ApplicationExpr appExpr, Type *polyType, bool isIncr ) {
[01aeade]	1224	NameExpr *opExpr;
	1225	if ( isIncr ) {
	1226	opExpr = new NameExpr( "?+=?" );
	1227	} else {
	1228	opExpr = new NameExpr( "?-=?" );
[6c3744e]	1229	} // if
[01aeade]	1230	UntypedExpr *addAssign = new UntypedExpr( opExpr );
	1231	if ( AddressExpr address = dynamic_cast< AddressExpr >( appExpr->get_args().front() ) ) {
	1232	addAssign->get_args().push_back( address->get_arg() );
	1233	} else {
	1234	addAssign->get_args().push_back( appExpr->get_args().front() );
[6c3744e]	1235	} // if
[adc6781]	1236	addAssign->get_args().push_back( new NameExpr( sizeofName( mangleType( polyType ) ) ) );
[01aeade]	1237	addAssign->get_results().front() = appExpr->get_results().front()->clone();
	1238	if ( appExpr->get_env() ) {
	1239	addAssign->set_env( appExpr->get_env() );
[6c3744e]	1240	appExpr->set_env( 0 );
	1241	} // if
[01aeade]	1242	appExpr->get_args().clear();
	1243	delete appExpr;
	1244	return addAssign;
	1245	}
	1246
	1247	Expression Pass1::handleIntrinsics( ApplicationExpr appExpr ) {
	1248	if ( VariableExpr varExpr = dynamic_cast< VariableExpr >( appExpr->get_function() ) ) {
	1249	if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic ) {
	1250	if ( varExpr->get_var()->get_name() == "?[?]" ) {
	1251	assert( ! appExpr->get_results().empty() );
	1252	assert( appExpr->get_args().size() == 2 );
[ffad73a]	1253	Type *baseType1 = isPolyPtr( appExpr->get_args().front()->get_results().front(), scopeTyVars, env );
	1254	Type *baseType2 = isPolyPtr( appExpr->get_args().back()->get_results().front(), scopeTyVars, env );
[ae63a18]	1255	assert( ! baseType1 \|\| ! baseType2 ); // the arguments cannot both be polymorphic pointers
[01aeade]	1256	UntypedExpr *ret = 0;
[ae63a18]	1257	if ( baseType1 \|\| baseType2 ) { // one of the arguments is a polymorphic pointer
[01aeade]	1258	ret = new UntypedExpr( new NameExpr( "?+?" ) );
	1259	} // if
[ffad73a]	1260	if ( baseType1 ) {
[01aeade]	1261	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1262	multiply->get_args().push_back( appExpr->get_args().back() );
[adc6781]	1263	multiply->get_args().push_back( new SizeofExpr( baseType1->clone() ) );
[01aeade]	1264	ret->get_args().push_back( appExpr->get_args().front() );
	1265	ret->get_args().push_back( multiply );
[ffad73a]	1266	} else if ( baseType2 ) {
[01aeade]	1267	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1268	multiply->get_args().push_back( appExpr->get_args().front() );
[adc6781]	1269	multiply->get_args().push_back( new SizeofExpr( baseType2->clone() ) );
[01aeade]	1270	ret->get_args().push_back( multiply );
	1271	ret->get_args().push_back( appExpr->get_args().back() );
	1272	} // if
[ffad73a]	1273	if ( baseType1 \|\| baseType2 ) {
[01aeade]	1274	ret->get_results().push_front( appExpr->get_results().front()->clone() );
	1275	if ( appExpr->get_env() ) {
	1276	ret->set_env( appExpr->get_env() );
	1277	appExpr->set_env( 0 );
	1278	} // if
	1279	appExpr->get_args().clear();
	1280	delete appExpr;
	1281	return ret;
	1282	} // if
	1283	} else if ( varExpr->get_var()->get_name() == "*?" ) {
	1284	assert( ! appExpr->get_results().empty() );
	1285	assert( ! appExpr->get_args().empty() );
[ffad73a]	1286	if ( isPolyType( appExpr->get_results().front(), scopeTyVars, env ) ) {
[01aeade]	1287	Expression *ret = appExpr->get_args().front();
	1288	delete ret->get_results().front();
	1289	ret->get_results().front() = appExpr->get_results().front()->clone();
	1290	if ( appExpr->get_env() ) {
	1291	ret->set_env( appExpr->get_env() );
	1292	appExpr->set_env( 0 );
	1293	} // if
	1294	appExpr->get_args().clear();
	1295	delete appExpr;
	1296	return ret;
	1297	} // if
	1298	} else if ( varExpr->get_var()->get_name() == "?++" \|\| varExpr->get_var()->get_name() == "?--" ) {
	1299	assert( ! appExpr->get_results().empty() );
	1300	assert( appExpr->get_args().size() == 1 );
[ffad73a]	1301	if ( Type *baseType = isPolyPtr( appExpr->get_results().front(), scopeTyVars, env ) ) {
[01aeade]	1302	Type *tempType = appExpr->get_results().front()->clone();
	1303	if ( env ) {
	1304	env->apply( tempType );
	1305	} // if
	1306	ObjectDecl *newObj = makeTemporary( tempType );
	1307	VariableExpr *tempExpr = new VariableExpr( newObj );
	1308	UntypedExpr *assignExpr = new UntypedExpr( new NameExpr( "?=?" ) );
	1309	assignExpr->get_args().push_back( tempExpr->clone() );
	1310	if ( AddressExpr address = dynamic_cast< AddressExpr >( appExpr->get_args().front() ) ) {
	1311	assignExpr->get_args().push_back( address->get_arg()->clone() );
	1312	} else {
	1313	assignExpr->get_args().push_back( appExpr->get_args().front()->clone() );
	1314	} // if
[ffad73a]	1315	CommaExpr *firstComma = new CommaExpr( assignExpr, makeIncrDecrExpr( appExpr, baseType, varExpr->get_var()->get_name() == "?++" ) );
[01aeade]	1316	return new CommaExpr( firstComma, tempExpr );
	1317	} // if
	1318	} else if ( varExpr->get_var()->get_name() == "++?" \|\| varExpr->get_var()->get_name() == "--?" ) {
	1319	assert( ! appExpr->get_results().empty() );
	1320	assert( appExpr->get_args().size() == 1 );
[ffad73a]	1321	if ( Type *baseType = isPolyPtr( appExpr->get_results().front(), scopeTyVars, env ) ) {
	1322	return makeIncrDecrExpr( appExpr, baseType, varExpr->get_var()->get_name() == "++?" );
[01aeade]	1323	} // if
	1324	} else if ( varExpr->get_var()->get_name() == "?+?" \|\| varExpr->get_var()->get_name() == "?-?" ) {
	1325	assert( ! appExpr->get_results().empty() );
	1326	assert( appExpr->get_args().size() == 2 );
[ffad73a]	1327	Type *baseType1 = isPolyPtr( appExpr->get_args().front()->get_results().front(), scopeTyVars, env );
	1328	Type *baseType2 = isPolyPtr( appExpr->get_args().back()->get_results().front(), scopeTyVars, env );
	1329	if ( baseType1 && baseType2 ) {
[01aeade]	1330	UntypedExpr *divide = new UntypedExpr( new NameExpr( "?/?" ) );
	1331	divide->get_args().push_back( appExpr );
[adc6781]	1332	divide->get_args().push_back( new SizeofExpr( baseType1->clone() ) );
[01aeade]	1333	divide->get_results().push_front( appExpr->get_results().front()->clone() );
	1334	if ( appExpr->get_env() ) {
	1335	divide->set_env( appExpr->get_env() );
	1336	appExpr->set_env( 0 );
	1337	} // if
	1338	return divide;
[ffad73a]	1339	} else if ( baseType1 ) {
[01aeade]	1340	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1341	multiply->get_args().push_back( appExpr->get_args().back() );
[adc6781]	1342	multiply->get_args().push_back( new SizeofExpr( baseType1->clone() ) );
[01aeade]	1343	appExpr->get_args().back() = multiply;
[ffad73a]	1344	} else if ( baseType2 ) {
[01aeade]	1345	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1346	multiply->get_args().push_back( appExpr->get_args().front() );
[adc6781]	1347	multiply->get_args().push_back( new SizeofExpr( baseType2->clone() ) );
[01aeade]	1348	appExpr->get_args().front() = multiply;
	1349	} // if
	1350	} else if ( varExpr->get_var()->get_name() == "?+=?" \|\| varExpr->get_var()->get_name() == "?-=?" ) {
	1351	assert( ! appExpr->get_results().empty() );
	1352	assert( appExpr->get_args().size() == 2 );
[ffad73a]	1353	Type *baseType = isPolyPtr( appExpr->get_results().front(), scopeTyVars, env );
	1354	if ( baseType ) {
[01aeade]	1355	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1356	multiply->get_args().push_back( appExpr->get_args().back() );
[adc6781]	1357	multiply->get_args().push_back( new SizeofExpr( baseType->clone() ) );
[01aeade]	1358	appExpr->get_args().back() = multiply;
	1359	} // if
	1360	} // if
	1361	return appExpr;
	1362	} // if
[6c3744e]	1363	} // if
[01aeade]	1364	return 0;
	1365	}
[6c3744e]	1366
[01aeade]	1367	Expression Pass1::mutate( ApplicationExpr appExpr ) {
[e56cfdb0]	1368	// std::cerr << "mutate appExpr: ";
	1369	// for ( TyVarMap::iterator i = scopeTyVars.begin(); i != scopeTyVars.end(); ++i ) {
	1370	// std::cerr << i->first << " ";
	1371	// }
	1372	// std::cerr << "\n";
[01aeade]	1373	bool oldUseRetval = useRetval;
	1374	useRetval = false;
	1375	appExpr->get_function()->acceptMutator( *this );
	1376	mutateAll( appExpr->get_args(), *this );
	1377	useRetval = oldUseRetval;
[ae63a18]	1378
[01aeade]	1379	assert( ! appExpr->get_function()->get_results().empty() );
	1380	PointerType pointer = dynamic_cast< PointerType >( appExpr->get_function()->get_results().front() );
	1381	assert( pointer );
	1382	FunctionType function = dynamic_cast< FunctionType >( pointer->get_base() );
	1383	assert( function );
[ae63a18]	1384
[01aeade]	1385	if ( Expression *newExpr = handleIntrinsics( appExpr ) ) {
	1386	return newExpr;
	1387	} // if
[ae63a18]	1388
[01aeade]	1389	Expression *ret = appExpr;
[ae63a18]	1390
[01aeade]	1391	std::list< Expression *>::iterator arg = appExpr->get_args().begin();
	1392	std::list< Expression *>::iterator paramBegin = appExpr->get_args().begin();
[ae63a18]	1393
[bfae637]	1394	TyVarMap exprTyVars( (TypeDecl::Kind)-1 );
[5c52b06]	1395	makeTyVarMap( function, exprTyVars );
[dc12481]	1396	ReferenceToType *polyRetType = isPolyRet( function );
[5c52b06]	1397
[dc12481]	1398	if ( polyRetType ) {
[5c52b06]	1399	ret = addPolyRetParam( appExpr, function, polyRetType, arg );
[01aeade]	1400	} else if ( needsAdapter( function, scopeTyVars ) ) {
[e56cfdb0]	1401	// std::cerr << "needs adapter: ";
[2e3a379]	1402	// printTyVarMap( std::cerr, scopeTyVars );
	1403	// std::cerr << *env << std::endl;
[01aeade]	1404	// change the application so it calls the adapter rather than the passed function
	1405	ret = applyAdapter( appExpr, function, arg, scopeTyVars );
	1406	} // if
	1407	arg = appExpr->get_args().begin();
[ae63a18]	1408
[5c52b06]	1409	passTypeVars( appExpr, polyRetType, arg, exprTyVars );
[01aeade]	1410	addInferredParams( appExpr, function, arg, exprTyVars );
[51b73452]	1411
[01aeade]	1412	arg = paramBegin;
[ae63a18]	1413
[01aeade]	1414	boxParams( appExpr, function, arg, exprTyVars );
	1415	passAdapters( appExpr, function, exprTyVars );
[6c3744e]	1416
[01aeade]	1417	return ret;
	1418	}
[6c3744e]	1419
[01aeade]	1420	Expression Pass1::mutate( UntypedExpr expr ) {
[ffad73a]	1421	if ( ! expr->get_results().empty() && isPolyType( expr->get_results().front(), scopeTyVars, env ) ) {
[01aeade]	1422	if ( NameExpr name = dynamic_cast< NameExpr >( expr->get_function() ) ) {
	1423	if ( name->get_name() == "*?" ) {
	1424	Expression *ret = expr->get_args().front();
	1425	expr->get_args().clear();
	1426	delete expr;
	1427	return ret->acceptMutator( *this );
	1428	} // if
	1429	} // if
	1430	} // if
	1431	return PolyMutator::mutate( expr );
	1432	}
[6c3744e]	1433
[01aeade]	1434	Expression Pass1::mutate( AddressExpr addrExpr ) {
	1435	assert( ! addrExpr->get_arg()->get_results().empty() );
[cf16f94]	1436
	1437	bool needs = false;
	1438	if ( UntypedExpr expr = dynamic_cast< UntypedExpr >( addrExpr->get_arg() ) ) {
[5f6c42c]	1439	if ( ! expr->get_results().empty() && isPolyType( expr->get_results().front(), scopeTyVars, env ) ) {
[cf16f94]	1440	if ( NameExpr name = dynamic_cast< NameExpr >( expr->get_function() ) ) {
	1441	if ( name->get_name() == "*?" ) {
	1442	if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr->get_args().front() ) ) {
	1443	assert( ! appExpr->get_function()->get_results().empty() );
	1444	PointerType pointer = dynamic_cast< PointerType >( appExpr->get_function()->get_results().front() );
	1445	assert( pointer );
	1446	FunctionType function = dynamic_cast< FunctionType >( pointer->get_base() );
	1447	assert( function );
	1448	needs = needsAdapter( function, scopeTyVars );
	1449	} // if
	1450	} // if
	1451	} // if
	1452	} // if
	1453	} // if
[fea7ca7]	1454	// isPolyType check needs to happen before mutating addrExpr arg, so pull it forward
	1455	// out of the if condition.
	1456	bool polytype = isPolyType( addrExpr->get_arg()->get_results().front(), scopeTyVars, env );
[01aeade]	1457	addrExpr->set_arg( mutateExpression( addrExpr->get_arg() ) );
[fea7ca7]	1458	if ( polytype \|\| needs ) {
[01aeade]	1459	Expression *ret = addrExpr->get_arg();
	1460	delete ret->get_results().front();
	1461	ret->get_results().front() = addrExpr->get_results().front()->clone();
	1462	addrExpr->set_arg( 0 );
	1463	delete addrExpr;
	1464	return ret;
	1465	} else {
	1466	return addrExpr;
	1467	} // if
	1468	}
[6c3744e]	1469
[b10c9959]	1470	/// Wraps a function declaration in a new pointer-to-function variable expression
	1471	VariableExpr wrapFunctionDecl( DeclarationWithType functionDecl ) {
	1472	// line below cloned from FixFunction.cc
	1473	ObjectDecl *functionObj = new ObjectDecl( functionDecl->get_name(), functionDecl->get_storageClass(), functionDecl->get_linkage(), 0,
	1474	new PointerType( Type::Qualifiers(), functionDecl->get_type()->clone() ), 0 );
	1475	functionObj->set_mangleName( functionDecl->get_mangleName() );
	1476	return new VariableExpr( functionObj );
	1477	}
[70a06f6]	1478
[c2ad3c9]	1479	/// Finds the operation declaration for a given type in one of the two maps
	1480	DeclarationWithType* findOpForType( Type formalType, const ScopedMap< std::string, DeclarationWithType >& ops, ResolvExpr::TypeMap< DeclarationWithType >& scopedOps ) {
	1481	if ( TypeInstType formalTypeInstType = dynamic_cast< TypeInstType >( formalType ) ) {
	1482	ScopedMap< std::string, DeclarationWithType *>::const_iterator opIt = ops.find( formalTypeInstType->get_name() );
	1483	return opIt == ops.end() ? 0 : opIt->second;
	1484	} else {
	1485	return scopedOps.find( formalType );
	1486	}
	1487	}
	1488
	1489	/// Adds an assertion parameter to the application expression for the actual assertion declaration valued with the assert op
	1490	void addAssertionFor( ApplicationExpr appExpr, DeclarationWithType actualDecl, DeclarationWithType *assertOp ) {
	1491	appExpr->get_inferParams()[ actualDecl->get_uniqueId() ]
	1492	= ParamEntry( assertOp->get_uniqueId(), assertOp->get_type()->clone(), actualDecl->get_type()->clone(), wrapFunctionDecl( assertOp ) );
	1493	}
	1494
[cf16f94]	1495	Statement * Pass1::mutate( ReturnStmt *returnStmt ) {
	1496	if ( retval && returnStmt->get_expr() ) {
	1497	assert( ! returnStmt->get_expr()->get_results().empty() );
	1498	// *** Code Removal *** After introducing a temporary variable for all return expressions, the following code appears superfluous.
	1499	// if ( returnStmt->get_expr()->get_results().front()->get_isLvalue() ) {
[ae63a18]	1500	// by this point, a cast expr on a polymorphic return value is redundant
[cf16f94]	1501	while ( CastExpr castExpr = dynamic_cast< CastExpr >( returnStmt->get_expr() ) ) {
	1502	returnStmt->set_expr( castExpr->get_arg() );
	1503	returnStmt->get_expr()->set_env( castExpr->get_env() );
	1504	castExpr->set_env( 0 );
	1505	castExpr->set_arg( 0 );
	1506	delete castExpr;
[5f6c42c]	1507	} //while
[1194734]	1508
	1509	// find assignment operator for (polymorphic) return type
[b10c9959]	1510	ApplicationExpr *assignExpr = 0;
[1194734]	1511	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( retval->get_type() ) ) {
[b10c9959]	1512	// find assignment operator for type variable
[63c0dbf]	1513	ScopedMap< std::string, DeclarationWithType *>::const_iterator assignIter = assignOps.find( typeInst->get_name() );
[1194734]	1514	if ( assignIter == assignOps.end() ) {
	1515	throw SemanticError( "Attempt to return dtype or ftype object in ", returnStmt->get_expr() );
	1516	} // if
[b10c9959]	1517	assignExpr = new ApplicationExpr( new VariableExpr( assignIter->second ) );
[1194734]	1518	} else if ( ReferenceToType refType = dynamic_cast< ReferenceToType >( retval->get_type() ) ) {
[b10c9959]	1519	// find assignment operator for generic type
[dc12481]	1520	DeclarationWithType *functionDecl = scopedAssignOps.find( refType );
	1521	if ( ! functionDecl ) {
[1194734]	1522	throw SemanticError( "Attempt to return dtype or ftype generic object in ", returnStmt->get_expr() );
	1523	}
[b10c9959]	1524
	1525	// wrap it up in an application expression
	1526	assignExpr = new ApplicationExpr( wrapFunctionDecl( functionDecl ) );
	1527	assignExpr->set_env( env->clone() );
	1528
	1529	// find each of its needed secondary assignment operators
	1530	std::list< Expression* > &tyParams = refType->get_parameters();
	1531	std::list< TypeDecl* > &forallParams = functionDecl->get_type()->get_forall();
	1532	std::list< Expression* >::const_iterator tyIt = tyParams.begin();
	1533	std::list< TypeDecl* >::const_iterator forallIt = forallParams.begin();
	1534	for ( ; tyIt != tyParams.end() && forallIt != forallParams.end(); ++tyIt, ++forallIt ) {
[ae7014e]	1535	// Add appropriate mapping to assignment expression environment
[b10c9959]	1536	TypeExpr formalTypeExpr = dynamic_cast< TypeExpr >( *tyIt );
	1537	assert( formalTypeExpr && "type parameters must be type expressions" );
	1538	Type *formalType = formalTypeExpr->get_type();
[ae7014e]	1539	assignExpr->get_env()->add( (*forallIt)->get_name(), formalType );
	1540
[c2ad3c9]	1541	// skip non-otype parameters (ftype/dtype)
[ae7014e]	1542	if ( (*forallIt)->get_kind() != TypeDecl::Any ) continue;
	1543
[c2ad3c9]	1544	// find otype operators for formal type
	1545	DeclarationWithType *assertAssign = findOpForType( formalType, assignOps, scopedAssignOps );
	1546	if ( ! assertAssign ) throw SemanticError( "No assignment operation found for ", formalType );
	1547
	1548	DeclarationWithType *assertCtor = findOpForType( formalType, ctorOps, scopedCtorOps );
	1549	if ( ! assertCtor ) throw SemanticError( "No default constructor found for ", formalType );
[b10c9959]	1550
[c2ad3c9]	1551	DeclarationWithType *assertCopy = findOpForType( formalType, copyOps, scopedCopyOps );
	1552	if ( ! assertCopy ) throw SemanticError( "No copy constructor found for ", formalType );
	1553
	1554	DeclarationWithType *assertDtor = findOpForType( formalType, dtorOps, scopedDtorOps );
	1555	if ( ! assertDtor ) throw SemanticError( "No destructor found for ", formalType );
	1556
	1557	// add inferred parameters for otype operators to assignment expression
	1558	// NOTE: Code here assumes that first four assertions are assign op, ctor, copy ctor, dtor, in that order
[ae7014e]	1559	std::list< DeclarationWithType* > &asserts = (*forallIt)->get_assertions();
[c2ad3c9]	1560	assert( asserts.size() >= 4 && "Type param needs otype operator assertions" );
	1561
	1562	std::list< DeclarationWithType* >::iterator actualIt = asserts.begin();
	1563	addAssertionFor( assignExpr, *actualIt, assertAssign );
	1564	++actualIt;
	1565	addAssertionFor( assignExpr, *actualIt, assertCtor );
	1566	++actualIt;
	1567	addAssertionFor( assignExpr, *actualIt, assertCopy );
	1568	++actualIt;
	1569	addAssertionFor( assignExpr, *actualIt, assertDtor );
	1570
	1571	//DeclarationWithType *actualDecl = asserts.front();
	1572	//assignExpr->get_inferParams()[ actualDecl->get_uniqueId() ]
	1573	// = ParamEntry( assertAssign->get_uniqueId(), assertAssign->get_type()->clone(), actualDecl->get_type()->clone(), wrapFunctionDecl( assertAssign ) );
[b10c9959]	1574	}
[1194734]	1575	}
[b10c9959]	1576	assert( assignExpr );
[1194734]	1577
	1578	// replace return statement with appropriate assignment to out parameter
[cf16f94]	1579	Expression *retParm = new NameExpr( retval->get_name() );
	1580	retParm->get_results().push_back( new PointerType( Type::Qualifiers(), retval->get_type()->clone() ) );
	1581	assignExpr->get_args().push_back( retParm );
	1582	assignExpr->get_args().push_back( returnStmt->get_expr() );
	1583	stmtsToAdd.push_back( new ExprStmt( noLabels, mutateExpression( assignExpr ) ) );
	1584	// } else {
	1585	// useRetval = true;
	1586	// stmtsToAdd.push_back( new ExprStmt( noLabels, mutateExpression( returnStmt->get_expr() ) ) );
	1587	// useRetval = false;
	1588	// } // if
	1589	returnStmt->set_expr( 0 );
[01aeade]	1590	} else {
[cf16f94]	1591	returnStmt->set_expr( mutateExpression( returnStmt->get_expr() ) );
[01aeade]	1592	} // if
[cf16f94]	1593	return returnStmt;
[01aeade]	1594	}
[6c3744e]	1595
[01aeade]	1596	Type * Pass1::mutate( PointerType *pointerType ) {
[6f49cdf]	1597	scopeTyVars.beginScope();
[01aeade]	1598	makeTyVarMap( pointerType, scopeTyVars );
[ae63a18]	1599
[01aeade]	1600	Type *ret = Mutator::mutate( pointerType );
[ae63a18]	1601
[6f49cdf]	1602	scopeTyVars.endScope();
[01aeade]	1603	return ret;
	1604	}
[6c3744e]	1605
[01aeade]	1606	Type * Pass1::mutate( FunctionType *functionType ) {
[6f49cdf]	1607	scopeTyVars.beginScope();
[01aeade]	1608	makeTyVarMap( functionType, scopeTyVars );
[ae63a18]	1609
[01aeade]	1610	Type *ret = Mutator::mutate( functionType );
[ae63a18]	1611
[6f49cdf]	1612	scopeTyVars.endScope();
[01aeade]	1613	return ret;
	1614	}
[51b73452]	1615
[01aeade]	1616	void Pass1::doBeginScope() {
[6635c74]	1617	adapters.beginScope();
[1194734]	1618	scopedAssignOps.beginScope();
[c2ad3c9]	1619	scopedCtorOps.beginScope();
	1620	scopedCopyOps.beginScope();
	1621	scopedDtorOps.beginScope();
[01aeade]	1622	}
[b1a6d6b]	1623
[01aeade]	1624	void Pass1::doEndScope() {
[6635c74]	1625	adapters.endScope();
[1194734]	1626	scopedAssignOps.endScope();
[c2ad3c9]	1627	scopedCtorOps.endScope();
	1628	scopedCopyOps.endScope();
	1629	scopedDtorOps.endScope();
[01aeade]	1630	}
[51b73452]	1631
	1632	////////////////////////////////////////// Pass2 ////////////////////////////////////////////////////
	1633
[01aeade]	1634	void Pass2::addAdapters( FunctionType *functionType ) {
	1635	std::list< DeclarationWithType *> &paramList = functionType->get_parameters();
	1636	std::list< FunctionType *> functions;
	1637	for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) {
	1638	Type orig = (arg)->get_type();
	1639	findAndReplaceFunction( orig, functions, scopeTyVars, needsAdapter );
	1640	(*arg)->set_type( orig );
	1641	}
	1642	std::set< std::string > adaptersDone;
	1643	for ( std::list< FunctionType *>::iterator funType = functions.begin(); funType != functions.end(); ++funType ) {
[bdf1954]	1644	std::string mangleName = mangleAdapterName( *funType, scopeTyVars );
[01aeade]	1645	if ( adaptersDone.find( mangleName ) == adaptersDone.end() ) {
	1646	std::string adapterName = makeAdapterName( mangleName );
[68cd1ce]	1647	paramList.push_front( new ObjectDecl( adapterName, DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new PointerType( Type::Qualifiers(), makeAdapterType( *funType, scopeTyVars ) ), 0 ) );
[01aeade]	1648	adaptersDone.insert( adaptersDone.begin(), mangleName );
	1649	}
	1650	}
[5f6c42c]	1651	// deleteAll( functions );
[01aeade]	1652	}
[6c3744e]	1653
[01aeade]	1654	template< typename DeclClass >
	1655	DeclClass * Pass2::handleDecl( DeclClass decl, Type type ) {
	1656	DeclClass ret = static_cast< DeclClass >( Mutator::mutate( decl ) );
[6c3744e]	1657
[01aeade]	1658	return ret;
	1659	}
[6c3744e]	1660
[01aeade]	1661	DeclarationWithType * Pass2::mutate( FunctionDecl *functionDecl ) {
	1662	return handleDecl( functionDecl, functionDecl->get_functionType() );
	1663	}
[6c3744e]	1664
[01aeade]	1665	ObjectDecl * Pass2::mutate( ObjectDecl *objectDecl ) {
	1666	return handleDecl( objectDecl, objectDecl->get_type() );
	1667	}
[6c3744e]	1668
[01aeade]	1669	TypeDecl * Pass2::mutate( TypeDecl *typeDecl ) {
	1670	scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind();
	1671	if ( typeDecl->get_base() ) {
	1672	return handleDecl( typeDecl, typeDecl->get_base() );
	1673	} else {
	1674	return Mutator::mutate( typeDecl );
	1675	}
	1676	}
[6c3744e]	1677
[01aeade]	1678	TypedefDecl * Pass2::mutate( TypedefDecl *typedefDecl ) {
	1679	return handleDecl( typedefDecl, typedefDecl->get_base() );
	1680	}
[6c3744e]	1681
[01aeade]	1682	Type * Pass2::mutate( PointerType *pointerType ) {
[6f49cdf]	1683	scopeTyVars.beginScope();
[01aeade]	1684	makeTyVarMap( pointerType, scopeTyVars );
[ae63a18]	1685
[01aeade]	1686	Type *ret = Mutator::mutate( pointerType );
[ae63a18]	1687
[6f49cdf]	1688	scopeTyVars.endScope();
[01aeade]	1689	return ret;
	1690	}
[6c3744e]	1691
[01aeade]	1692	Type Pass2::mutate( FunctionType funcType ) {
[6f49cdf]	1693	scopeTyVars.beginScope();
[01aeade]	1694	makeTyVarMap( funcType, scopeTyVars );
[7754cde]	1695
	1696	// move polymorphic return type to parameter list
[aadc9a4]	1697	if ( isPolyRet( funcType ) ) {
[01aeade]	1698	DeclarationWithType *ret = funcType->get_returnVals().front();
	1699	ret->set_type( new PointerType( Type::Qualifiers(), ret->get_type() ) );
	1700	funcType->get_parameters().push_front( ret );
	1701	funcType->get_returnVals().pop_front();
	1702	}
[7754cde]	1703
	1704	// add size/align and assertions for type parameters to parameter list
[01aeade]	1705	std::list< DeclarationWithType *>::iterator last = funcType->get_parameters().begin();
	1706	std::list< DeclarationWithType *> inferredParams;
[78dd0da]	1707	ObjectDecl newObj( "", DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), 0 );
[05d47278]	1708	ObjectDecl newPtr( "", DeclarationNode::NoStorageClass, LinkageSpec::C, 0,
	1709	new PointerType( Type::Qualifiers(), new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ) ), 0 );
[01aeade]	1710	for ( std::list< TypeDecl *>::const_iterator tyParm = funcType->get_forall().begin(); tyParm != funcType->get_forall().end(); ++tyParm ) {
[db0b3ce]	1711	ObjectDecl sizeParm, alignParm;
	1712	// add all size and alignment parameters to parameter list
[01aeade]	1713	if ( (*tyParm)->get_kind() == TypeDecl::Any ) {
[78dd0da]	1714	TypeInstType parmType( Type::Qualifiers(), (tyParm)->get_name(), tyParm );
[adc6781]	1715	std::string parmName = mangleType( &parmType );
[ae63a18]	1716
[78dd0da]	1717	sizeParm = newObj.clone();
[adc6781]	1718	sizeParm->set_name( sizeofName( parmName ) );
[db0b3ce]	1719	last = funcType->get_parameters().insert( last, sizeParm );
	1720	++last;
[78dd0da]	1721
	1722	alignParm = newObj.clone();
[adc6781]	1723	alignParm->set_name( alignofName( parmName ) );
[db0b3ce]	1724	last = funcType->get_parameters().insert( last, alignParm );
[01aeade]	1725	++last;
	1726	}
[e56cfdb0]	1727	// move all assertions into parameter list
[01aeade]	1728	for ( std::list< DeclarationWithType >::iterator assert = (tyParm)->get_assertions().begin(); assert != (*tyParm)->get_assertions().end(); ++assert ) {
[f8b961b]	1729	// assert = (assert)->acceptMutator( *this );
[01aeade]	1730	inferredParams.push_back( *assert );
	1731	}
	1732	(*tyParm)->get_assertions().clear();
	1733	}
[7754cde]	1734
[5c52b06]	1735	// add size/align for generic parameter types to parameter list
[b18b0b5]	1736	std::set< std::string > seenTypes; // sizeofName for generic types we've seen
[7754cde]	1737	for ( std::list< DeclarationWithType* >::const_iterator fnParm = last; fnParm != funcType->get_parameters().end(); ++fnParm ) {
[4b8f918]	1738	Type polyType = isPolyType( (fnParm)->get_type(), scopeTyVars );
	1739	if ( polyType && ! dynamic_cast< TypeInstType* >( polyType ) ) {
	1740	std::string typeName = mangleType( polyType );
[adc6781]	1741	if ( seenTypes.count( typeName ) ) continue;
[ae63a18]	1742
[05d47278]	1743	ObjectDecl sizeParm, alignParm, *offsetParm;
[7754cde]	1744	sizeParm = newObj.clone();
[adc6781]	1745	sizeParm->set_name( sizeofName( typeName ) );
[7754cde]	1746	last = funcType->get_parameters().insert( last, sizeParm );
	1747	++last;
	1748
	1749	alignParm = newObj.clone();
[adc6781]	1750	alignParm->set_name( alignofName( typeName ) );
[7754cde]	1751	last = funcType->get_parameters().insert( last, alignParm );
	1752	++last;
	1753
[4b8f918]	1754	if ( StructInstType polyBaseStruct = dynamic_cast< StructInstType >( polyType ) ) {
[89173242]	1755	// NOTE zero-length arrays are illegal in C, so empty structs have no offset array
	1756	if ( ! polyBaseStruct->get_baseStruct()->get_members().empty() ) {
	1757	offsetParm = newPtr.clone();
[adc6781]	1758	offsetParm->set_name( offsetofName( typeName ) );
[89173242]	1759	last = funcType->get_parameters().insert( last, offsetParm );
	1760	++last;
	1761	}
[05d47278]	1762	}
	1763
[adc6781]	1764	seenTypes.insert( typeName );
[7754cde]	1765	}
	1766	}
	1767
	1768	// splice assertion parameters into parameter list
[01aeade]	1769	funcType->get_parameters().splice( last, inferredParams );
	1770	addAdapters( funcType );
	1771	mutateAll( funcType->get_returnVals(), *this );
	1772	mutateAll( funcType->get_parameters(), *this );
[ae63a18]	1773
[6f49cdf]	1774	scopeTyVars.endScope();
[01aeade]	1775	return funcType;
	1776	}
[51b73452]	1777
[4e284ea6]	1778	//////////////////////////////////////// GenericInstantiator //////////////////////////////////////////////////
	1779
	1780	/// Makes substitutions of params into baseParams; returns true if all parameters substituted for a concrete type
	1781	bool makeSubstitutions( const std::list< TypeDecl* >& baseParams, const std::list< Expression* >& params, std::list< TypeExpr* >& out ) {
	1782	bool allConcrete = true; // will finish the substitution list even if they're not all concrete
	1783
	1784	// substitute concrete types for given parameters, and incomplete types for placeholders
	1785	std::list< TypeDecl* >::const_iterator baseParam = baseParams.begin();
	1786	std::list< Expression* >::const_iterator param = params.begin();
	1787	for ( ; baseParam != baseParams.end() && param != params.end(); ++baseParam, ++param ) {
	1788	// switch ( (*baseParam)->get_kind() ) {
	1789	// case TypeDecl::Any: { // any type is a valid substitution here; complete types can be used to instantiate generics
	1790	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
	1791	assert(paramType && "Aggregate parameters should be type expressions");
	1792	out.push_back( paramType->clone() );
	1793	// check that the substituted type isn't a type variable itself
	1794	if ( dynamic_cast< TypeInstType* >( paramType->get_type() ) ) {
	1795	allConcrete = false;
	1796	}
	1797	// break;
	1798	// }
	1799	// case TypeDecl::Dtype: // dtype can be consistently replaced with void [only pointers, which become void*]
	1800	// out.push_back( new TypeExpr( new VoidType( Type::Qualifiers() ) ) );
	1801	// break;
	1802	// case TypeDecl::Ftype: // pointer-to-ftype can be consistently replaced with void (*)(void) [similar to dtype]
	1803	// out.push_back( new TypeExpr( new FunctionType( Type::Qualifiers(), false ) ) );
	1804	// break;
	1805	// }
	1806	}
	1807
	1808	// if any parameters left over, not done
	1809	if ( baseParam != baseParams.end() ) return false;
	1810	// // if not enough parameters given, substitute remaining incomplete types for placeholders
	1811	// for ( ; baseParam != baseParams.end(); ++baseParam ) {
	1812	// switch ( (*baseParam)->get_kind() ) {
	1813	// case TypeDecl::Any: // no more substitutions here, fail early
	1814	// return false;
	1815	// case TypeDecl::Dtype: // dtype can be consistently replaced with void [only pointers, which become void*]
	1816	// out.push_back( new TypeExpr( new VoidType( Type::Qualifiers() ) ) );
	1817	// break;
	1818	// case TypeDecl::Ftype: // pointer-to-ftype can be consistently replaced with void (*)(void) [similar to dtype]
	1819	// out.push_back( new TypeExpr( new FunctionType( Type::Qualifiers(), false ) ) );
	1820	// break;
	1821	// }
	1822	// }
	1823
	1824	return allConcrete;
	1825	}
	1826
	1827	/// Substitutes types of members of in according to baseParams => typeSubs, appending the result to out
	1828	void substituteMembers( const std::list< Declaration* >& in, const std::list< TypeDecl* >& baseParams, const std::list< TypeExpr* >& typeSubs,
	1829	std::list< Declaration* >& out ) {
	1830	// substitute types into new members
	1831	TypeSubstitution subs( baseParams.begin(), baseParams.end(), typeSubs.begin() );
	1832	for ( std::list< Declaration* >::const_iterator member = in.begin(); member != in.end(); ++member ) {
	1833	Declaration newMember = (member)->clone();
	1834	subs.apply(newMember);
	1835	out.push_back( newMember );
	1836	}
	1837	}
	1838
	1839	Type* GenericInstantiator::mutate( StructInstType *inst ) {
	1840	// mutate subtypes
	1841	Type *mutated = Mutator::mutate( inst );
	1842	inst = dynamic_cast< StructInstType* >( mutated );
	1843	if ( ! inst ) return mutated;
	1844
	1845	// exit early if no need for further mutation
	1846	if ( inst->get_parameters().empty() ) return inst;
	1847	assert( inst->get_baseParameters() && "Base struct has parameters" );
	1848
	1849	// check if type can be concretely instantiated; put substitutions into typeSubs
	1850	std::list< TypeExpr* > typeSubs;
	1851	if ( ! makeSubstitutions( *inst->get_baseParameters(), inst->get_parameters(), typeSubs ) ) {
	1852	deleteAll( typeSubs );
	1853	return inst;
	1854	}
	1855
	1856	// make concrete instantiation of generic type
	1857	StructDecl *concDecl = lookup( inst, typeSubs );
	1858	if ( ! concDecl ) {
	1859	// set concDecl to new type, insert type declaration into statements to add
	1860	concDecl = new StructDecl( typeNamer.newName( inst->get_name() ) );
	1861	substituteMembers( inst->get_baseStruct()->get_members(), *inst->get_baseParameters(), typeSubs, concDecl->get_members() );
	1862	DeclMutator::addDeclaration( concDecl );
	1863	insert( inst, typeSubs, concDecl );
	1864	}
	1865	StructInstType *newInst = new StructInstType( inst->get_qualifiers(), concDecl->get_name() );
	1866	newInst->set_baseStruct( concDecl );
	1867
	1868	deleteAll( typeSubs );
	1869	delete inst;
	1870	return newInst;
	1871	}
	1872
	1873	Type* GenericInstantiator::mutate( UnionInstType *inst ) {
	1874	// mutate subtypes
	1875	Type *mutated = Mutator::mutate( inst );
	1876	inst = dynamic_cast< UnionInstType* >( mutated );
	1877	if ( ! inst ) return mutated;
	1878
	1879	// exit early if no need for further mutation
	1880	if ( inst->get_parameters().empty() ) return inst;
	1881	assert( inst->get_baseParameters() && "Base union has parameters" );
	1882
	1883	// check if type can be concretely instantiated; put substitutions into typeSubs
	1884	std::list< TypeExpr* > typeSubs;
	1885	if ( ! makeSubstitutions( *inst->get_baseParameters(), inst->get_parameters(), typeSubs ) ) {
	1886	deleteAll( typeSubs );
	1887	return inst;
	1888	}
	1889
	1890	// make concrete instantiation of generic type
	1891	UnionDecl *concDecl = lookup( inst, typeSubs );
	1892	if ( ! concDecl ) {
	1893	// set concDecl to new type, insert type declaration into statements to add
	1894	concDecl = new UnionDecl( typeNamer.newName( inst->get_name() ) );
	1895	substituteMembers( inst->get_baseUnion()->get_members(), *inst->get_baseParameters(), typeSubs, concDecl->get_members() );
	1896	DeclMutator::addDeclaration( concDecl );
	1897	insert( inst, typeSubs, concDecl );
	1898	}
	1899	UnionInstType *newInst = new UnionInstType( inst->get_qualifiers(), concDecl->get_name() );
	1900	newInst->set_baseUnion( concDecl );
	1901
	1902	deleteAll( typeSubs );
	1903	delete inst;
	1904	return newInst;
	1905	}
	1906
	1907	// /// Gets the base struct or union declaration for a member expression; NULL if not applicable
	1908	// AggregateDecl* getMemberBaseDecl( MemberExpr *memberExpr ) {
	1909	// // get variable for member aggregate
	1910	// VariableExpr varExpr = dynamic_cast< VariableExpr >( memberExpr->get_aggregate() );
	1911	// if ( ! varExpr ) return NULL;
	1912	//
	1913	// // get object for variable
	1914	// ObjectDecl objectDecl = dynamic_cast< ObjectDecl >( varExpr->get_var() );
	1915	// if ( ! objectDecl ) return NULL;
	1916	//
	1917	// // get base declaration from object type
	1918	// Type *objectType = objectDecl->get_type();
	1919	// StructInstType structType = dynamic_cast< StructInstType >( objectType );
	1920	// if ( structType ) return structType->get_baseStruct();
	1921	// UnionInstType unionType = dynamic_cast< UnionInstType >( objectType );
	1922	// if ( unionType ) return unionType->get_baseUnion();
	1923	//
	1924	// return NULL;
	1925	// }
	1926	//
	1927	// /// Finds the declaration with the given name, returning decls.end() if none such
	1928	// std::list< Declaration* >::const_iterator findDeclNamed( const std::list< Declaration* > &decls, const std::string &name ) {
	1929	// for( std::list< Declaration* >::const_iterator decl = decls.begin(); decl != decls.end(); ++decl ) {
	1930	// if ( (*decl)->get_name() == name ) return decl;
	1931	// }
	1932	// return decls.end();
	1933	// }
	1934	//
	1935	// Expression* Instantiate::mutate( MemberExpr *memberExpr ) {
	1936	// // mutate, exiting early if no longer MemberExpr
	1937	// Expression *expr = Mutator::mutate( memberExpr );
	1938	// memberExpr = dynamic_cast< MemberExpr* >( expr );
	1939	// if ( ! memberExpr ) return expr;
	1940	//
	1941	// // get declaration of member and base declaration of member, exiting early if not found
	1942	// AggregateDecl *memberBase = getMemberBaseDecl( memberExpr );
	1943	// if ( ! memberBase ) return memberExpr;
	1944	// DeclarationWithType *memberDecl = memberExpr->get_member();
	1945	// std::list< Declaration* >::const_iterator baseIt = findDeclNamed( memberBase->get_members(), memberDecl->get_name() );
	1946	// if ( baseIt == memberBase->get_members().end() ) return memberExpr;
	1947	// DeclarationWithType baseDecl = dynamic_cast< DeclarationWithType >( *baseIt );
	1948	// if ( ! baseDecl ) return memberExpr;
	1949	//
	1950	// // check if stated type of the member is not the type of the member's declaration; if so, need a cast
	1951	// // this SHOULD be safe, I don't think anything but the void-replacements I put in for dtypes would make it past the typechecker
	1952	// SymTab::Indexer dummy;
	1953	// if ( ResolvExpr::typesCompatible( memberDecl->get_type(), baseDecl->get_type(), dummy ) ) return memberExpr;
	1954	// else return new CastExpr( memberExpr, memberDecl->get_type() );
	1955	// }
	1956
	1957	void GenericInstantiator::doBeginScope() {
	1958	DeclMutator::doBeginScope();
	1959	instantiations.beginScope();
	1960	}
	1961
	1962	void GenericInstantiator::doEndScope() {
	1963	DeclMutator::doEndScope();
	1964	instantiations.endScope();
	1965	}
	1966
[4b8f918]	1967	////////////////////////////////////////// PolyGenericCalculator ////////////////////////////////////////////////////
[51b73452]	1968
[aa19ccf]	1969	void PolyGenericCalculator::beginTypeScope( Type *ty ) {
	1970	scopeTyVars.beginScope();
	1971	makeTyVarMap( ty, scopeTyVars );
	1972	}
	1973
	1974	void PolyGenericCalculator::endTypeScope() {
	1975	scopeTyVars.endScope();
	1976	}
[51b73452]	1977
[01aeade]	1978	template< typename DeclClass >
[8a34677]	1979	DeclClass * PolyGenericCalculator::handleDecl( DeclClass decl, Type type ) {
[aa19ccf]	1980	beginTypeScope( type );
	1981	knownLayouts.beginScope();
	1982	knownOffsets.beginScope();
[ae63a18]	1983
[01aeade]	1984	DeclClass ret = static_cast< DeclClass >( Mutator::mutate( decl ) );
[6c3744e]	1985
[aa19ccf]	1986	knownOffsets.endScope();
	1987	knownLayouts.endScope();
	1988	endTypeScope();
[01aeade]	1989	return ret;
	1990	}
[6c3744e]	1991
[8a34677]	1992	ObjectDecl * PolyGenericCalculator::mutate( ObjectDecl *objectDecl ) {
[01aeade]	1993	return handleDecl( objectDecl, objectDecl->get_type() );
	1994	}
[6c3744e]	1995
[8a34677]	1996	DeclarationWithType * PolyGenericCalculator::mutate( FunctionDecl *functionDecl ) {
[01aeade]	1997	return handleDecl( functionDecl, functionDecl->get_functionType() );
	1998	}
[6c3744e]	1999
[8a34677]	2000	TypedefDecl * PolyGenericCalculator::mutate( TypedefDecl *typedefDecl ) {
[01aeade]	2001	return handleDecl( typedefDecl, typedefDecl->get_base() );
	2002	}
[6c3744e]	2003
[8a34677]	2004	TypeDecl * PolyGenericCalculator::mutate( TypeDecl *typeDecl ) {
[01aeade]	2005	scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind();
	2006	return Mutator::mutate( typeDecl );
	2007	}
[51b73452]	2008
[8a34677]	2009	Type * PolyGenericCalculator::mutate( PointerType *pointerType ) {
[aa19ccf]	2010	beginTypeScope( pointerType );
[ae63a18]	2011
[01aeade]	2012	Type *ret = Mutator::mutate( pointerType );
[ae63a18]	2013
[aa19ccf]	2014	endTypeScope();
[01aeade]	2015	return ret;
	2016	}
[6c3744e]	2017
[8a34677]	2018	Type * PolyGenericCalculator::mutate( FunctionType *funcType ) {
[aa19ccf]	2019	beginTypeScope( funcType );
[ae63a18]	2020
[8a34677]	2021	// make sure that any type information passed into the function is accounted for
	2022	for ( std::list< DeclarationWithType* >::const_iterator fnParm = funcType->get_parameters().begin(); fnParm != funcType->get_parameters().end(); ++fnParm ) {
	2023	// condition here duplicates that in Pass2::mutate( FunctionType* )
[4b8f918]	2024	Type polyType = isPolyType( (fnParm)->get_type(), scopeTyVars );
	2025	if ( polyType && ! dynamic_cast< TypeInstType* >( polyType ) ) {
	2026	knownLayouts.insert( mangleType( polyType ) );
[8a34677]	2027	}
	2028	}
[70a06f6]	2029
[8a34677]	2030	Type *ret = Mutator::mutate( funcType );
[ae63a18]	2031
[aa19ccf]	2032	endTypeScope();
[01aeade]	2033	return ret;
[6c3744e]	2034	}
[51b73452]	2035
[8a34677]	2036	Statement PolyGenericCalculator::mutate( DeclStmt declStmt ) {
[01aeade]	2037	if ( ObjectDecl objectDecl = dynamic_cast< ObjectDecl >( declStmt->get_decl() ) ) {
[8a34677]	2038	if ( findGeneric( objectDecl->get_type() ) ) {
[e01559c]	2039	// change initialization of a polymorphic value object
	2040	// to allocate storage with alloca
[ffad73a]	2041	Type *declType = objectDecl->get_type();
[01aeade]	2042	UntypedExpr *alloc = new UntypedExpr( new NameExpr( "__builtin_alloca" ) );
[adc6781]	2043	alloc->get_args().push_back( new NameExpr( sizeofName( mangleType( declType ) ) ) );
[e01559c]	2044
	2045	delete objectDecl->get_init();
	2046
	2047	std::list<Expression*> designators;
[974906e2]	2048	objectDecl->set_init( new SingleInit( alloc, designators, false ) ); // not constructed
[01aeade]	2049	}
	2050	}
	2051	return Mutator::mutate( declStmt );
	2052	}
[05d47278]	2053
[2a4b088]	2054	/// Finds the member in the base list that matches the given declaration; returns its index, or -1 if not present
	2055	long findMember( DeclarationWithType memberDecl, std::list< Declaration > &baseDecls ) {
	2056	long i = 0;
	2057	for(std::list< Declaration* >::const_iterator decl = baseDecls.begin(); decl != baseDecls.end(); ++decl, ++i ) {
	2058	if ( memberDecl->get_name() != (*decl)->get_name() ) continue;
	2059
	2060	if ( DeclarationWithType declWithType = dynamic_cast< DeclarationWithType >( *decl ) ) {
[bed4d37c]	2061	if ( memberDecl->get_mangleName().empty() \|\| declWithType->get_mangleName().empty()
	2062	\|\| memberDecl->get_mangleName() == declWithType->get_mangleName() ) return i;
[2a4b088]	2063	else continue;
	2064	} else return i;
	2065	}
	2066	return -1;
	2067	}
	2068
	2069	/// Returns an index expression into the offset array for a type
	2070	Expression makeOffsetIndex( Type objectType, long i ) {
	2071	std::stringstream offset_namer;
	2072	offset_namer << i;
	2073	ConstantExpr *fieldIndex = new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), offset_namer.str() ) );
	2074	UntypedExpr *fieldOffset = new UntypedExpr( new NameExpr( "?[?]" ) );
[adc6781]	2075	fieldOffset->get_args().push_back( new NameExpr( offsetofName( mangleType( objectType ) ) ) );
[2a4b088]	2076	fieldOffset->get_args().push_back( fieldIndex );
	2077	return fieldOffset;
	2078	}
	2079
	2080	/// Returns an expression dereferenced n times
	2081	Expression makeDerefdVar( Expression derefdVar, long n ) {
	2082	for ( int i = 1; i < n; ++i ) {
	2083	UntypedExpr derefExpr = new UntypedExpr( new NameExpr( "?" ) );
	2084	derefExpr->get_args().push_back( derefdVar );
[10a7775]	2085	// xxx - should set results on derefExpr
[2a4b088]	2086	derefdVar = derefExpr;
	2087	}
	2088	return derefdVar;
	2089	}
[d63eeb0]	2090
[8a34677]	2091	Expression PolyGenericCalculator::mutate( MemberExpr memberExpr ) {
[05d47278]	2092	// mutate, exiting early if no longer MemberExpr
	2093	Expression *expr = Mutator::mutate( memberExpr );
	2094	memberExpr = dynamic_cast< MemberExpr* >( expr );
	2095	if ( ! memberExpr ) return expr;
	2096
	2097	// get declaration for base struct, exiting early if not found
[8488c715]	2098	int varDepth;
	2099	VariableExpr *varExpr = getBaseVar( memberExpr->get_aggregate(), &varDepth );
[05d47278]	2100	if ( ! varExpr ) return memberExpr;
	2101	ObjectDecl objectDecl = dynamic_cast< ObjectDecl >( varExpr->get_var() );
	2102	if ( ! objectDecl ) return memberExpr;
	2103
	2104	// only mutate member expressions for polymorphic types
[8488c715]	2105	int tyDepth;
	2106	Type *objectType = hasPolyBase( objectDecl->get_type(), scopeTyVars, &tyDepth );
[05d47278]	2107	if ( ! objectType ) return memberExpr;
[8a34677]	2108	findGeneric( objectType ); // ensure layout for this type is available
[05d47278]	2109
[4318107]	2110	Expression *newMemberExpr = 0;
[05d47278]	2111	if ( StructInstType structType = dynamic_cast< StructInstType >( objectType ) ) {
[2a4b088]	2112	// look up offset index
	2113	long i = findMember( memberExpr->get_member(), structType->get_baseStruct()->get_members() );
	2114	if ( i == -1 ) return memberExpr;
[05d47278]	2115
[2a4b088]	2116	// replace member expression with pointer to base plus offset
	2117	UntypedExpr *fieldLoc = new UntypedExpr( new NameExpr( "?+?" ) );
	2118	fieldLoc->get_args().push_back( makeDerefdVar( varExpr->clone(), varDepth ) );
	2119	fieldLoc->get_args().push_back( makeOffsetIndex( objectType, i ) );
[4318107]	2120	newMemberExpr = fieldLoc;
[98735ef]	2121	} else if ( dynamic_cast< UnionInstType* >( objectType ) ) {
[2a4b088]	2122	// union members are all at offset zero, so build appropriately-dereferenced variable
[4318107]	2123	newMemberExpr = makeDerefdVar( varExpr->clone(), varDepth );
[2a4b088]	2124	} else return memberExpr;
[4318107]	2125	assert( newMemberExpr );
	2126
[4067aa8]	2127	Type *memberType = memberExpr->get_member()->get_type();
	2128	if ( ! isPolyType( memberType, scopeTyVars ) ) {
	2129	// Not all members of a polymorphic type are themselves of polymorphic type; in this case the member expression should be wrapped and dereferenced to form an lvalue
	2130	CastExpr *ptrCastExpr = new CastExpr( newMemberExpr, new PointerType( Type::Qualifiers(), memberType->clone() ) );
[4318107]	2131	UntypedExpr derefExpr = new UntypedExpr( new NameExpr( "?" ) );
	2132	derefExpr->get_args().push_back( ptrCastExpr );
	2133	newMemberExpr = derefExpr;
	2134	}
	2135
	2136	delete memberExpr;
	2137	return newMemberExpr;
[2a4b088]	2138	}
[05d47278]	2139
[8a34677]	2140	ObjectDecl PolyGenericCalculator::makeVar( const std::string &name, Type type, Initializer *init ) {
	2141	ObjectDecl *newObj = new ObjectDecl( name, DeclarationNode::NoStorageClass, LinkageSpec::C, 0, type, init );
	2142	stmtsToAdd.push_back( new DeclStmt( noLabels, newObj ) );
	2143	return newObj;
	2144	}
	2145
	2146	void PolyGenericCalculator::addOtypeParamsToLayoutCall( UntypedExpr layoutCall, const std::list< Type > &otypeParams ) {
	2147	for ( std::list< Type* >::const_iterator param = otypeParams.begin(); param != otypeParams.end(); ++param ) {
	2148	if ( findGeneric( *param ) ) {
	2149	// push size/align vars for a generic parameter back
[adc6781]	2150	std::string paramName = mangleType( *param );
	2151	layoutCall->get_args().push_back( new NameExpr( sizeofName( paramName ) ) );
	2152	layoutCall->get_args().push_back( new NameExpr( alignofName( paramName ) ) );
[8a34677]	2153	} else {
	2154	layoutCall->get_args().push_back( new SizeofExpr( (*param)->clone() ) );
	2155	layoutCall->get_args().push_back( new AlignofExpr( (*param)->clone() ) );
	2156	}
	2157	}
	2158	}
	2159
	2160	/// returns true if any of the otype parameters have a dynamic layout and puts all otype parameters in the output list
	2161	bool findGenericParams( std::list< TypeDecl* > &baseParams, std::list< Expression* > &typeParams, std::list< Type* > &out ) {
	2162	bool hasDynamicLayout = false;
	2163
	2164	std::list< TypeDecl* >::const_iterator baseParam = baseParams.begin();
	2165	std::list< Expression* >::const_iterator typeParam = typeParams.begin();
	2166	for ( ; baseParam != baseParams.end() && typeParam != typeParams.end(); ++baseParam, ++typeParam ) {
	2167	// skip non-otype parameters
	2168	if ( (*baseParam)->get_kind() != TypeDecl::Any ) continue;
	2169	TypeExpr typeExpr = dynamic_cast< TypeExpr >( *typeParam );
	2170	assert( typeExpr && "all otype parameters should be type expressions" );
	2171
	2172	Type *type = typeExpr->get_type();
	2173	out.push_back( type );
	2174	if ( isPolyType( type ) ) hasDynamicLayout = true;
	2175	}
	2176	assert( baseParam == baseParams.end() && typeParam == typeParams.end() );
	2177
	2178	return hasDynamicLayout;
	2179	}
	2180
	2181	bool PolyGenericCalculator::findGeneric( Type *ty ) {
[c2ad3c9]	2182	ty = replaceTypeInst( ty, env );
	2183
[8a34677]	2184	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( ty ) ) {
	2185	if ( scopeTyVars.find( typeInst->get_name() ) != scopeTyVars.end() ) {
	2186	// NOTE assumes here that getting put in the scopeTyVars included having the layout variables set
	2187	return true;
	2188	}
	2189	return false;
	2190	} else if ( StructInstType structTy = dynamic_cast< StructInstType >( ty ) ) {
	2191	// check if this type already has a layout generated for it
[adc6781]	2192	std::string typeName = mangleType( ty );
	2193	if ( knownLayouts.find( typeName ) != knownLayouts.end() ) return true;
[8a34677]	2194
	2195	// check if any of the type parameters have dynamic layout; if none do, this type is (or will be) monomorphized
	2196	std::list< Type* > otypeParams;
	2197	if ( ! findGenericParams( *structTy->get_baseParameters(), structTy->get_parameters(), otypeParams ) ) return false;
	2198
	2199	// insert local variables for layout and generate call to layout function
[adc6781]	2200	knownLayouts.insert( typeName ); // done early so as not to interfere with the later addition of parameters to the layout call
[8a34677]	2201	Type *layoutType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	2202
	2203	int n_members = structTy->get_baseStruct()->get_members().size();
	2204	if ( n_members == 0 ) {
	2205	// all empty structs have the same layout - size 1, align 1
[cc3528f]	2206	makeVar( sizeofName( typeName ), layoutType, new SingleInit( new ConstantExpr( Constant::from_ulong( (unsigned long)1 ) ) ) );
	2207	makeVar( alignofName( typeName ), layoutType->clone(), new SingleInit( new ConstantExpr( Constant::from_ulong( (unsigned long)1 ) ) ) );
[8a34677]	2208	// NOTE zero-length arrays are forbidden in C, so empty structs have no offsetof array
	2209	} else {
[adc6781]	2210	ObjectDecl *sizeVar = makeVar( sizeofName( typeName ), layoutType );
	2211	ObjectDecl *alignVar = makeVar( alignofName( typeName ), layoutType->clone() );
[cb4c607]	2212	ObjectDecl *offsetVar = makeVar( offsetofName( typeName ), new ArrayType( Type::Qualifiers(), layoutType->clone(), new ConstantExpr( Constant::from_int( n_members ) ), false, false ) );
[8a34677]	2213
	2214	// generate call to layout function
[adc6781]	2215	UntypedExpr *layoutCall = new UntypedExpr( new NameExpr( layoutofName( structTy->get_baseStruct() ) ) );
[8a34677]	2216	layoutCall->get_args().push_back( new AddressExpr( new VariableExpr( sizeVar ) ) );
	2217	layoutCall->get_args().push_back( new AddressExpr( new VariableExpr( alignVar ) ) );
	2218	layoutCall->get_args().push_back( new VariableExpr( offsetVar ) );
	2219	addOtypeParamsToLayoutCall( layoutCall, otypeParams );
	2220
	2221	stmtsToAdd.push_back( new ExprStmt( noLabels, layoutCall ) );
	2222	}
	2223
	2224	return true;
	2225	} else if ( UnionInstType unionTy = dynamic_cast< UnionInstType >( ty ) ) {
	2226	// check if this type already has a layout generated for it
[adc6781]	2227	std::string typeName = mangleType( ty );
	2228	if ( knownLayouts.find( typeName ) != knownLayouts.end() ) return true;
[8a34677]	2229
	2230	// check if any of the type parameters have dynamic layout; if none do, this type is (or will be) monomorphized
	2231	std::list< Type* > otypeParams;
	2232	if ( ! findGenericParams( *unionTy->get_baseParameters(), unionTy->get_parameters(), otypeParams ) ) return false;
	2233
	2234	// insert local variables for layout and generate call to layout function
[adc6781]	2235	knownLayouts.insert( typeName ); // done early so as not to interfere with the later addition of parameters to the layout call
[8a34677]	2236	Type *layoutType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	2237
[adc6781]	2238	ObjectDecl *sizeVar = makeVar( sizeofName( typeName ), layoutType );
	2239	ObjectDecl *alignVar = makeVar( alignofName( typeName ), layoutType->clone() );
[8a34677]	2240
	2241	// generate call to layout function
[adc6781]	2242	UntypedExpr *layoutCall = new UntypedExpr( new NameExpr( layoutofName( unionTy->get_baseUnion() ) ) );
[8a34677]	2243	layoutCall->get_args().push_back( new AddressExpr( new VariableExpr( sizeVar ) ) );
	2244	layoutCall->get_args().push_back( new AddressExpr( new VariableExpr( alignVar ) ) );
	2245	addOtypeParamsToLayoutCall( layoutCall, otypeParams );
	2246
	2247	stmtsToAdd.push_back( new ExprStmt( noLabels, layoutCall ) );
	2248
	2249	return true;
	2250	}
	2251
	2252	return false;
	2253	}
	2254
	2255	Expression PolyGenericCalculator::mutate( SizeofExpr sizeofExpr ) {
	2256	Type *ty = sizeofExpr->get_type();
	2257	if ( findGeneric( ty ) ) {
[adc6781]	2258	Expression *ret = new NameExpr( sizeofName( mangleType( ty ) ) );
[8a34677]	2259	delete sizeofExpr;
	2260	return ret;
	2261	}
	2262	return sizeofExpr;
	2263	}
	2264
	2265	Expression PolyGenericCalculator::mutate( AlignofExpr alignofExpr ) {
	2266	Type *ty = alignofExpr->get_type();
	2267	if ( findGeneric( ty ) ) {
[adc6781]	2268	Expression *ret = new NameExpr( alignofName( mangleType( ty ) ) );
[8a34677]	2269	delete alignofExpr;
	2270	return ret;
	2271	}
	2272	return alignofExpr;
	2273	}
	2274
	2275	Expression PolyGenericCalculator::mutate( OffsetofExpr offsetofExpr ) {
[2a4b088]	2276	// mutate, exiting early if no longer OffsetofExpr
	2277	Expression *expr = Mutator::mutate( offsetofExpr );
	2278	offsetofExpr = dynamic_cast< OffsetofExpr* >( expr );
	2279	if ( ! offsetofExpr ) return expr;
	2280
	2281	// only mutate expressions for polymorphic structs/unions
[8a34677]	2282	Type *ty = offsetofExpr->get_type();
	2283	if ( ! findGeneric( ty ) ) return offsetofExpr;
[2a4b088]	2284
	2285	if ( StructInstType structType = dynamic_cast< StructInstType >( ty ) ) {
	2286	// replace offsetof expression by index into offset array
	2287	long i = findMember( offsetofExpr->get_member(), structType->get_baseStruct()->get_members() );
	2288	if ( i == -1 ) return offsetofExpr;
	2289
	2290	Expression *offsetInd = makeOffsetIndex( ty, i );
	2291	delete offsetofExpr;
	2292	return offsetInd;
[5c52b06]	2293	} else if ( dynamic_cast< UnionInstType* >( ty ) ) {
[2a4b088]	2294	// all union members are at offset zero
	2295	delete offsetofExpr;
	2296	return new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), std::string("0") ) );
	2297	} else return offsetofExpr;
[05d47278]	2298	}
	2299
[8a34677]	2300	Expression PolyGenericCalculator::mutate( OffsetPackExpr offsetPackExpr ) {
	2301	StructInstType *ty = offsetPackExpr->get_type();
	2302
	2303	Expression *ret = 0;
	2304	if ( findGeneric( ty ) ) {
	2305	// pull offset back from generated type information
[adc6781]	2306	ret = new NameExpr( offsetofName( mangleType( ty ) ) );
[8a34677]	2307	} else {
[adc6781]	2308	std::string offsetName = offsetofName( mangleType( ty ) );
[8a34677]	2309	if ( knownOffsets.find( offsetName ) != knownOffsets.end() ) {
	2310	// use the already-generated offsets for this type
	2311	ret = new NameExpr( offsetName );
	2312	} else {
	2313	knownOffsets.insert( offsetName );
	2314
	2315	std::list< Declaration* > &baseMembers = ty->get_baseStruct()->get_members();
	2316	Type *offsetType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	2317
	2318	// build initializer list for offset array
	2319	std::list< Initializer* > inits;
	2320	for ( std::list< Declaration* >::const_iterator member = baseMembers.begin(); member != baseMembers.end(); ++member ) {
	2321	DeclarationWithType *memberDecl;
	2322	if ( DeclarationWithType origMember = dynamic_cast< DeclarationWithType >( *member ) ) {
	2323	memberDecl = origMember->clone();
	2324	} else {
	2325	memberDecl = new ObjectDecl( (*member)->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, offsetType->clone(), 0 );
	2326	}
	2327	inits.push_back( new SingleInit( new OffsetofExpr( ty->clone(), memberDecl ) ) );
	2328	}
	2329
	2330	// build the offset array and replace the pack with a reference to it
[cb4c607]	2331	ObjectDecl *offsetArray = makeVar( offsetName, new ArrayType( Type::Qualifiers(), offsetType, new ConstantExpr( Constant::from_ulong( baseMembers.size() ) ), false, false ),
[8a34677]	2332	new ListInit( inits ) );
	2333	ret = new VariableExpr( offsetArray );
	2334	}
	2335	}
	2336
	2337	delete offsetPackExpr;
	2338	return ret;
	2339	}
	2340
	2341	void PolyGenericCalculator::doBeginScope() {
	2342	knownLayouts.beginScope();
	2343	knownOffsets.beginScope();
	2344	}
	2345
	2346	void PolyGenericCalculator::doEndScope() {
	2347	knownLayouts.endScope();
[adc6781]	2348	knownOffsets.endScope();
[8a34677]	2349	}
	2350
[05d47278]	2351	////////////////////////////////////////// Pass3 ////////////////////////////////////////////////////
	2352
	2353	template< typename DeclClass >
	2354	DeclClass * Pass3::handleDecl( DeclClass decl, Type type ) {
[6f49cdf]	2355	scopeTyVars.beginScope();
[05d47278]	2356	makeTyVarMap( type, scopeTyVars );
	2357
	2358	DeclClass ret = static_cast< DeclClass >( Mutator::mutate( decl ) );
	2359	ScrubTyVars::scrub( decl, scopeTyVars );
	2360
[6f49cdf]	2361	scopeTyVars.endScope();
[05d47278]	2362	return ret;
	2363	}
	2364
	2365	ObjectDecl * Pass3::mutate( ObjectDecl *objectDecl ) {
	2366	return handleDecl( objectDecl, objectDecl->get_type() );
	2367	}
	2368
	2369	DeclarationWithType * Pass3::mutate( FunctionDecl *functionDecl ) {
	2370	return handleDecl( functionDecl, functionDecl->get_functionType() );
	2371	}
	2372
	2373	TypedefDecl * Pass3::mutate( TypedefDecl *typedefDecl ) {
	2374	return handleDecl( typedefDecl, typedefDecl->get_base() );
	2375	}
	2376
	2377	TypeDecl * Pass3::mutate( TypeDecl *typeDecl ) {
	2378	// Initializer *init = 0;
	2379	// std::list< Expression *> designators;
	2380	// scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind();
	2381	// if ( typeDecl->get_base() ) {
	2382	// init = new SimpleInit( new SizeofExpr( handleDecl( typeDecl, typeDecl->get_base() ) ), designators );
	2383	// }
	2384	// return new ObjectDecl( typeDecl->get_name(), Declaration::Extern, LinkageSpec::C, 0, new BasicType( Type::Qualifiers(), BasicType::UnsignedInt ), init );
	2385
	2386	scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind();
	2387	return Mutator::mutate( typeDecl );
	2388	}
	2389
	2390	Type * Pass3::mutate( PointerType *pointerType ) {
[6f49cdf]	2391	scopeTyVars.beginScope();
[05d47278]	2392	makeTyVarMap( pointerType, scopeTyVars );
	2393
	2394	Type *ret = Mutator::mutate( pointerType );
	2395
[6f49cdf]	2396	scopeTyVars.endScope();
[05d47278]	2397	return ret;
	2398	}
	2399
	2400	Type * Pass3::mutate( FunctionType *functionType ) {
[6f49cdf]	2401	scopeTyVars.beginScope();
[05d47278]	2402	makeTyVarMap( functionType, scopeTyVars );
	2403
	2404	Type *ret = Mutator::mutate( functionType );
	2405
[6f49cdf]	2406	scopeTyVars.endScope();
[05d47278]	2407	return ret;
	2408	}
[01aeade]	2409	} // anonymous namespace
[51b73452]	2410	} // namespace GenPoly
[01aeade]	2411
[51587aa]	2412	// Local Variables: //
	2413	// tab-width: 4 //
	2414	// mode: c++ //
	2415	// compile-command: "make install" //
	2416	// End: //

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