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source: src/GenPoly/Box.cc@ 3da470c

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Last change on this file since 3da470c was 8a34677, checked in by Aaron Moss <a3moss@…>, 9 years ago
Move layout function generation into renamed MemberExprFixer pass
Property mode set to `100644`
File size: 102.4 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
[bd85400]	11	// Last Modified By : Peter A. Buhr
	12	// Last Modified On : Fri Feb 5 16:45:07 2016
	13	// Update Count : 286
[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 );
	135
	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	};
	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
[01aeade]	199	void findAssignOps( const std::list< TypeDecl *> &forall );
	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
[89173242]	207	std::map< std::string, DeclarationWithType *> assignOps; ///< Currently known type variable assignment operators
	208	ResolvExpr::TypeMap< DeclarationWithType > scopedAssignOps; ///< Currently known assignment operators
	209	ScopedMap< std::string, DeclarationWithType* > adapters; ///< Set of adapter functions in the current scope
	210
[01aeade]	211	DeclarationWithType *retval;
	212	bool useRetval;
	213	UniqueName tempNamer;
	214	};
	215
[89173242]	216	/// * Moves polymorphic returns in function types to pointer-type parameters
	217	/// * adds type size and assertion parameters to parameter lists
[01aeade]	218	class Pass2 : public PolyMutator {
	219	public:
	220	template< typename DeclClass >
	221	DeclClass handleDecl( DeclClass decl, Type *type );
	222	virtual DeclarationWithType mutate( FunctionDecl functionDecl );
	223	virtual ObjectDecl mutate( ObjectDecl objectDecl );
	224	virtual TypeDecl mutate( TypeDecl typeDecl );
	225	virtual TypedefDecl mutate( TypedefDecl typedefDecl );
	226	virtual Type mutate( PointerType pointerType );
	227	virtual Type mutate( FunctionType funcType );
[8a34677]	228
[01aeade]	229	private:
	230	void addAdapters( FunctionType *functionType );
[ae63a18]	231
[01aeade]	232	std::map< UniqueId, std::string > adapterName;
[89173242]	233	};
	234
[4e284ea6]	235	/// Mutator pass that replaces concrete instantiations of generic types with actual struct declarations, scoped appropriately
	236	class GenericInstantiator : public DeclMutator {
	237	/// Map of (generic type, parameter list) pairs to concrete type instantiations
[d1caa6c]	238	InstantiationMap< AggregateDecl, AggregateDecl > instantiations;
[4e284ea6]	239	/// Namer for concrete types
	240	UniqueName typeNamer;
	241
	242	public:
	243	GenericInstantiator() : DeclMutator(), instantiations(), typeNamer("_conc_") {}
	244
	245	virtual Type* mutate( StructInstType *inst );
	246	virtual Type* mutate( UnionInstType *inst );
	247
	248	// virtual Expression* mutate( MemberExpr *memberExpr );
	249
	250	virtual void doBeginScope();
	251	virtual void doEndScope();
	252	private:
	253	/// Wrap instantiation lookup for structs
	254	StructDecl* lookup( StructInstType inst, const std::list< TypeExpr > &typeSubs ) { return (StructDecl*)instantiations.lookup( inst->get_baseStruct(), typeSubs ); }
	255	/// Wrap instantiation lookup for unions
	256	UnionDecl* lookup( UnionInstType inst, const std::list< TypeExpr > &typeSubs ) { return (UnionDecl*)instantiations.lookup( inst->get_baseUnion(), typeSubs ); }
	257	/// Wrap instantiation insertion for structs
	258	void insert( StructInstType inst, const std::list< TypeExpr > &typeSubs, StructDecl *decl ) { instantiations.insert( inst->get_baseStruct(), typeSubs, decl ); }
	259	/// Wrap instantiation insertion for unions
	260	void insert( UnionInstType inst, const std::list< TypeExpr > &typeSubs, UnionDecl *decl ) { instantiations.insert( inst->get_baseUnion(), typeSubs, decl ); }
	261	};
	262
[8a34677]	263	/// Replaces member and size/align/offsetof expressions on polymorphic generic types with calculated expressions.
	264	/// * Replaces member expressions for polymorphic types with calculated add-field-offset-and-dereference
	265	/// * Calculates polymorphic offsetof expressions from offset array
	266	/// * Inserts dynamic calculation of polymorphic type layouts where needed
	267	class PolyGenericCalculator : public PolyMutator {
	268	public:
[05d47278]	269	template< typename DeclClass >
	270	DeclClass handleDecl( DeclClass decl, Type *type );
	271	virtual DeclarationWithType mutate( FunctionDecl functionDecl );
	272	virtual ObjectDecl mutate( ObjectDecl objectDecl );
	273	virtual TypedefDecl mutate( TypedefDecl objectDecl );
	274	virtual TypeDecl mutate( TypeDecl objectDecl );
	275	virtual Statement mutate( DeclStmt declStmt );
	276	virtual Type mutate( PointerType pointerType );
	277	virtual Type mutate( FunctionType funcType );
	278	virtual Expression mutate( MemberExpr memberExpr );
[8a34677]	279	virtual Expression mutate( SizeofExpr sizeofExpr );
	280	virtual Expression mutate( AlignofExpr alignofExpr );
[2a4b088]	281	virtual Expression mutate( OffsetofExpr offsetofExpr );
[8a34677]	282	virtual Expression mutate( OffsetPackExpr offsetPackExpr );
	283
	284	virtual void doBeginScope();
	285	virtual void doEndScope();
	286
	287	private:
	288	/// Makes a new variable in the current scope with the given name, type & optional initializer
	289	ObjectDecl makeVar( const std::string &name, Type type, Initializer *init = 0 );
	290	/// returns true if the type has a dynamic layout; such a layout will be stored in appropriately-named local variables when the function returns
	291	bool findGeneric( Type *ty );
	292	/// adds type parameters to the layout call; will generate the appropriate parameters if needed
	293	void addOtypeParamsToLayoutCall( UntypedExpr layoutCall, const std::list< Type > &otypeParams );
	294
	295	ScopedSet< std::string > knownLayouts; ///< Set of generic type layouts known in the current scope, indexed by sizeofName
	296	ScopedSet< std::string > knownOffsets; ///< Set of non-generic types for which the offset array exists in the current scope, indexed by offsetofName
[05d47278]	297	};
[b4cd03b7]	298
[f8b961b]	299	/// 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]	300	class Pass3 : public PolyMutator {
	301	public:
	302	template< typename DeclClass >
	303	DeclClass handleDecl( DeclClass decl, Type *type );
	304	virtual DeclarationWithType mutate( FunctionDecl functionDecl );
	305	virtual ObjectDecl mutate( ObjectDecl objectDecl );
	306	virtual TypedefDecl mutate( TypedefDecl objectDecl );
	307	virtual TypeDecl mutate( TypeDecl objectDecl );
	308	virtual Type mutate( PointerType pointerType );
	309	virtual Type mutate( FunctionType funcType );
	310	private:
	311	};
	312
	313	} // anonymous namespace
	314
[05d47278]	315	/// version of mutateAll with special handling for translation unit so you can check the end of the prelude when debugging
	316	template< typename MutatorType >
	317	inline void mutateTranslationUnit( std::list< Declaration* > &translationUnit, MutatorType &mutator ) {
	318	bool seenIntrinsic = false;
	319	SemanticError errors;
	320	for ( typename std::list< Declaration* >::iterator i = translationUnit.begin(); i != translationUnit.end(); ++i ) {
	321	try {
	322	if ( *i ) {
	323	if ( (*i)->get_linkage() == LinkageSpec::Intrinsic ) {
	324	seenIntrinsic = true;
	325	} else if ( seenIntrinsic ) {
	326	seenIntrinsic = false; // break on this line when debugging for end of prelude
	327	}
[b4cd03b7]	328
[05d47278]	329	i = dynamic_cast< Declaration >( (*i)->acceptMutator( mutator ) );
	330	assert( *i );
	331	} // if
	332	} catch( SemanticError &e ) {
	333	errors.append( e );
	334	} // try
	335	} // for
	336	if ( ! errors.isEmpty() ) {
	337	throw errors;
	338	} // if
	339	}
	340
[01aeade]	341	void box( std::list< Declaration *>& translationUnit ) {
[9d7b3ea]	342	LayoutFunctionBuilder layoutBuilder;
[01aeade]	343	Pass1 pass1;
	344	Pass2 pass2;
[4e284ea6]	345	GenericInstantiator instantiator;
[8a34677]	346	PolyGenericCalculator polyCalculator;
[01aeade]	347	Pass3 pass3;
[4e284ea6]	348
[9d7b3ea]	349	layoutBuilder.mutateDeclarationList( translationUnit );
[05d47278]	350	mutateTranslationUnit/All/( translationUnit, pass1 );
	351	mutateTranslationUnit/All/( translationUnit, pass2 );
[4e284ea6]	352	instantiator.mutateDeclarationList( translationUnit );
[8a34677]	353	mutateTranslationUnit/All/( translationUnit, polyCalculator );
[05d47278]	354	mutateTranslationUnit/All/( translationUnit, pass3 );
[6c3744e]	355	}
	356
[9d7b3ea]	357	////////////////////////////////// LayoutFunctionBuilder ////////////////////////////////////////////
	358
	359	DeclarationWithType LayoutFunctionBuilder::mutate( FunctionDecl functionDecl ) {
	360	functionDecl->set_functionType( maybeMutate( functionDecl->get_functionType(), *this ) );
	361	mutateAll( functionDecl->get_oldDecls(), *this );
	362	++functionNesting;
	363	functionDecl->set_statements( maybeMutate( functionDecl->get_statements(), *this ) );
	364	--functionNesting;
	365	return functionDecl;
	366	}
	367
	368	/// Get a list of type declarations that will affect a layout function
	369	std::list< TypeDecl* > takeOtypeOnly( std::list< TypeDecl* > &decls ) {
	370	std::list< TypeDecl * > otypeDecls;
	371
	372	for ( std::list< TypeDecl* >::const_iterator decl = decls.begin(); decl != decls.end(); ++decl ) {
[3627356]	373	if ( (*decl)->get_kind() == TypeDecl::Any ) {
[9d7b3ea]	374	otypeDecls.push_back( *decl );
	375	}
	376	}
	377
	378	return otypeDecls;
	379	}
	380
	381	/// Adds parameters for otype layout to a function type
	382	void addOtypeParams( FunctionType layoutFnType, std::list< TypeDecl > &otypeParams ) {
	383	BasicType sizeAlignType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	384
	385	for ( std::list< TypeDecl* >::const_iterator param = otypeParams.begin(); param != otypeParams.end(); ++param ) {
[2e60a1a]	386	TypeInstType paramType( Type::Qualifiers(), (param)->get_name(), param );
	387	layoutFnType->get_parameters().push_back( new ObjectDecl( sizeofName( &paramType ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignType.clone(), 0 ) );
	388	layoutFnType->get_parameters().push_back( new ObjectDecl( alignofName( &paramType ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignType.clone(), 0 ) );
[9d7b3ea]	389	}
	390	}
	391
	392	/// Builds a layout function declaration
	393	FunctionDecl buildLayoutFunctionDecl( const std::string &typeName, unsigned int functionNesting, FunctionType layoutFnType ) {
	394	// Routines at global scope marked "static" to prevent multiple definitions is separate translation units
	395	// because each unit generates copies of the default routines for each aggregate.
	396	FunctionDecl *layoutDecl = new FunctionDecl(
	397	"__layoutof_" + typeName, functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, layoutFnType, new CompoundStmt( noLabels ), true, false );
	398	layoutDecl->fixUniqueId();
	399	return layoutDecl;
	400	}
	401
	402	/// Makes a unary operation
	403	Expression makeOp( const std::string &name, Expression arg ) {
	404	UntypedExpr *expr = new UntypedExpr( new NameExpr( name ) );
	405	expr->get_args().push_back( arg );
	406	return expr;
	407	}
	408
	409	/// Makes a binary operation
	410	Expression makeOp( const std::string &name, Expression lhs, Expression *rhs ) {
	411	UntypedExpr *expr = new UntypedExpr( new NameExpr( name ) );
	412	expr->get_args().push_back( lhs );
	413	expr->get_args().push_back( rhs );
	414	return expr;
	415	}
	416
	417	/// Returns the dereference of a local pointer variable
	418	Expression derefVar( ObjectDecl var ) {
	419	return makeOp( "*?", new VariableExpr( var ) );
	420	}
	421
	422	/// makes an if-statement with a single-expression if-block and no then block
	423	Statement makeCond( Expression cond, Expression *ifPart ) {
[3627356]	424	return new IfStmt( noLabels, cond, new ExprStmt( noLabels, ifPart ), 0 );
[9d7b3ea]	425	}
	426
	427	/// makes a statement that assigns rhs to lhs if lhs < rhs
	428	Statement makeAssignMax( Expression lhs, Expression *rhs ) {
	429	return makeCond( makeOp( "?<?", lhs, rhs ), makeOp( "?=?", lhs->clone(), rhs->clone() ) );
	430	}
	431
	432	/// makes a statement that aligns lhs to rhs (rhs should be an integer power of two)
	433	Statement makeAlignTo( Expression lhs, Expression *rhs ) {
	434	// check that the lhs is zeroed out to the level of rhs
	435	Expression *ifCond = makeOp( "?&?", lhs, makeOp( "?-?", rhs, new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), "1" ) ) ) );
	436	// if not aligned, increment to alignment
	437	Expression *ifExpr = makeOp( "?+=?", lhs->clone(), makeOp( "?-?", rhs->clone(), ifCond->clone() ) );
	438	return makeCond( ifCond, ifExpr );
	439	}
	440
	441	/// adds an expression to a compound statement
	442	void addExpr( CompoundStmt stmts, Expression expr ) {
	443	stmts->get_kids().push_back( new ExprStmt( noLabels, expr ) );
	444	}
	445
	446	/// adds a statement to a compound statement
	447	void addStmt( CompoundStmt stmts, Statement stmt ) {
	448	stmts->get_kids().push_back( stmt );
	449	}
	450
[3627356]	451	Declaration LayoutFunctionBuilder::mutate( StructDecl structDecl ) {
[9d7b3ea]	452	// do not generate layout function for "empty" tag structs
	453	if ( structDecl->get_members().empty() ) return structDecl;
	454
	455	// get parameters that can change layout, exiting early if none
	456	std::list< TypeDecl* > otypeParams = takeOtypeOnly( structDecl->get_parameters() );
	457	if ( otypeParams.empty() ) return structDecl;
	458
	459	// build layout function signature
	460	FunctionType *layoutFnType = new FunctionType( Type::Qualifiers(), false );
	461	BasicType *sizeAlignType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	462	PointerType *sizeAlignOutType = new PointerType( Type::Qualifiers(), sizeAlignType );
	463
	464	ObjectDecl *sizeParam = new ObjectDecl( "__sizeof_" + structDecl->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType, 0 );
	465	layoutFnType->get_parameters().push_back( sizeParam );
	466	ObjectDecl *alignParam = new ObjectDecl( "__alignof_" + structDecl->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType->clone(), 0 );
	467	layoutFnType->get_parameters().push_back( alignParam );
	468	ObjectDecl *offsetParam = new ObjectDecl( "__offsetof_" + structDecl->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType->clone(), 0 );
	469	layoutFnType->get_parameters().push_back( offsetParam );
	470	addOtypeParams( layoutFnType, otypeParams );
	471
	472	// build function decl
	473	FunctionDecl *layoutDecl = buildLayoutFunctionDecl( structDecl->get_name(), functionNesting, layoutFnType );
	474
	475	// calculate struct layout in function body
	476
	477	// initialize size and alignment to 0 and 1 (will have at least one member to re-edit size
	478	addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( sizeParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "0" ) ) ) );
	479	addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( alignParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "1" ) ) ) );
	480	unsigned long n_members = 0;
	481	bool firstMember = true;
	482	for ( std::list< Declaration* >::const_iterator member = structDecl->get_members().begin(); member != structDecl->get_members().end(); ++member ) {
	483	DeclarationWithType dwt = dynamic_cast< DeclarationWithType >( *member );
	484	assert( dwt );
[bd91e2a]	485	Type *memberType = dwt->get_type();
[9d7b3ea]	486
	487	if ( firstMember ) {
	488	firstMember = false;
	489	} else {
	490	// make sure all members after the first (automatically aligned at 0) are properly padded for alignment
[bd91e2a]	491	addStmt( layoutDecl->get_statements(), makeAlignTo( derefVar( sizeParam ), new AlignofExpr( memberType->clone() ) ) );
[9d7b3ea]	492	}
	493
	494	// place current size in the current offset index
	495	addExpr( layoutDecl->get_statements(), makeOp( "?=?", makeOp( "?[?]", new VariableExpr( offsetParam ), new ConstantExpr( Constant::from( n_members ) ) ),
	496	derefVar( sizeParam ) ) );
	497	++n_members;
	498
	499	// add member size to current size
[bd91e2a]	500	addExpr( layoutDecl->get_statements(), makeOp( "?+=?", derefVar( sizeParam ), new SizeofExpr( memberType->clone() ) ) );
[9d7b3ea]	501
	502	// take max of member alignment and global alignment
[bd91e2a]	503	addStmt( layoutDecl->get_statements(), makeAssignMax( derefVar( alignParam ), new AlignofExpr( memberType->clone() ) ) );
[9d7b3ea]	504	}
	505	// make sure the type is end-padded to a multiple of its alignment
	506	addStmt( layoutDecl->get_statements(), makeAlignTo( derefVar( sizeParam ), derefVar( alignParam ) ) );
	507
	508	addDeclarationAfter( layoutDecl );
	509	return structDecl;
	510	}
	511
[3627356]	512	Declaration LayoutFunctionBuilder::mutate( UnionDecl unionDecl ) {
[9d7b3ea]	513	// do not generate layout function for "empty" tag unions
	514	if ( unionDecl->get_members().empty() ) return unionDecl;
	515
	516	// get parameters that can change layout, exiting early if none
	517	std::list< TypeDecl* > otypeParams = takeOtypeOnly( unionDecl->get_parameters() );
	518	if ( otypeParams.empty() ) return unionDecl;
	519
	520	// build layout function signature
	521	FunctionType *layoutFnType = new FunctionType( Type::Qualifiers(), false );
	522	BasicType *sizeAlignType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	523	PointerType *sizeAlignOutType = new PointerType( Type::Qualifiers(), sizeAlignType );
	524
	525	ObjectDecl *sizeParam = new ObjectDecl( "__sizeof_" + unionDecl->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType, 0 );
	526	layoutFnType->get_parameters().push_back( sizeParam );
	527	ObjectDecl *alignParam = new ObjectDecl( "__alignof_" + unionDecl->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType->clone(), 0 );
	528	layoutFnType->get_parameters().push_back( alignParam );
	529	addOtypeParams( layoutFnType, otypeParams );
	530
	531	// build function decl
	532	FunctionDecl *layoutDecl = buildLayoutFunctionDecl( unionDecl->get_name(), functionNesting, layoutFnType );
	533
	534	// calculate union layout in function body
	535	addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( sizeParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "1" ) ) ) );
	536	addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( alignParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "1" ) ) ) );
	537	for ( std::list< Declaration* >::const_iterator member = unionDecl->get_members().begin(); member != unionDecl->get_members().end(); ++member ) {
	538	DeclarationWithType dwt = dynamic_cast< DeclarationWithType >( *member );
	539	assert( dwt );
[bd91e2a]	540	Type *memberType = dwt->get_type();
[9d7b3ea]	541
	542	// take max member size and global size
[bd91e2a]	543	addStmt( layoutDecl->get_statements(), makeAssignMax( derefVar( sizeParam ), new SizeofExpr( memberType->clone() ) ) );
[9d7b3ea]	544
	545	// take max of member alignment and global alignment
[bd91e2a]	546	addStmt( layoutDecl->get_statements(), makeAssignMax( derefVar( alignParam ), new AlignofExpr( memberType->clone() ) ) );
[9d7b3ea]	547	}
	548	// make sure the type is end-padded to a multiple of its alignment
	549	addStmt( layoutDecl->get_statements(), makeAlignTo( derefVar( sizeParam ), derefVar( alignParam ) ) );
	550
	551	addDeclarationAfter( layoutDecl );
	552	return unionDecl;
	553	}
	554
[01aeade]	555	////////////////////////////////////////// Pass1 ////////////////////////////////////////////////////
	556
	557	namespace {
[bdf1954]	558	std::string makePolyMonoSuffix( FunctionType * function, const TyVarMap &tyVars ) {
	559	std::stringstream name;
	560
[ed1065c]	561	// NOTE: this function previously used isPolyObj, which failed to produce
	562	// the correct thing in some situations. It's not clear to me why this wasn't working.
	563
[ae63a18]	564	// if the return type or a parameter type involved polymorphic types, then the adapter will need
	565	// to take those polymorphic types as pointers. Therefore, there can be two different functions
[bdf1954]	566	// with the same mangled name, so we need to further mangle the names.
[ed1065c]	567	for ( std::list< DeclarationWithType *>::iterator retval = function->get_returnVals().begin(); retval != function->get_returnVals().end(); ++retval ) {
[ffad73a]	568	if ( isPolyType( (*retval)->get_type(), tyVars ) ) {
[ed1065c]	569	name << "P";
	570	} else {
	571	name << "M";
	572	}
[bdf1954]	573	}
	574	name << "_";
	575	std::list< DeclarationWithType *> &paramList = function->get_parameters();
	576	for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) {
[ffad73a]	577	if ( isPolyType( (*arg)->get_type(), tyVars ) ) {
[bdf1954]	578	name << "P";
	579	} else {
[ae63a18]	580	name << "M";
[bdf1954]	581	}
	582	} // for
	583	return name.str();
	584	}
	585
	586	std::string mangleAdapterName( FunctionType * function, const TyVarMap &tyVars ) {
	587	return SymTab::Mangler::mangle( function ) + makePolyMonoSuffix( function, tyVars );
	588	}
	589
[01aeade]	590	std::string makeAdapterName( const std::string &mangleName ) {
	591	return "_adapter" + mangleName;
	592	}
[6c3744e]	593
[6635c74]	594	Pass1::Pass1() : useRetval( false ), tempNamer( "_temp" ) {}
[01aeade]	595
[dc12481]	596	/// Returns T if the given declaration is (?=?)(T , T) for some TypeInstType T (return not checked, but maybe should be), NULL otherwise
	597	TypeInstType isTypeInstAssignment( DeclarationWithType decl ) {
[01aeade]	598	if ( decl->get_name() == "?=?" ) {
[1194734]	599	if ( FunctionType *funType = getFunctionType( decl->get_type() ) ) {
	600	if ( funType->get_parameters().size() == 2 ) {
	601	if ( PointerType pointer = dynamic_cast< PointerType >( funType->get_parameters().front()->get_type() ) ) {
[dc12481]	602	if ( TypeInstType refType = dynamic_cast< TypeInstType >( pointer->get_base() ) ) {
	603	if ( TypeInstType refType2 = dynamic_cast< TypeInstType >( funType->get_parameters().back()->get_type() ) ) {
[1194734]	604	if ( refType->get_name() == refType2->get_name() ) {
	605	return refType;
[cf16f94]	606	} // if
[01aeade]	607	} // if
	608	} // if
	609	} // if
	610	} // if
	611	} // if
	612	} // if
[1194734]	613	return 0;
[01aeade]	614	}
[dc12481]	615
	616	/// returns T if the given declaration is: (?=?)(T , T) for some type T (return not checked, but maybe should be), NULL otherwise
	617	/// Only picks assignments where neither parameter is cv-qualified
	618	Type isAssignment( DeclarationWithType decl ) {
	619	if ( decl->get_name() == "?=?" ) {
	620	if ( FunctionType *funType = getFunctionType( decl->get_type() ) ) {
	621	if ( funType->get_parameters().size() == 2 ) {
	622	Type::Qualifiers defaultQualifiers;
	623	Type *paramType1 = funType->get_parameters().front()->get_type();
	624	if ( paramType1->get_qualifiers() != defaultQualifiers ) return 0;
	625	Type *paramType2 = funType->get_parameters().back()->get_type();
	626	if ( paramType2->get_qualifiers() != defaultQualifiers ) return 0;
	627
	628	if ( PointerType pointerType = dynamic_cast< PointerType >( paramType1 ) ) {
	629	Type *baseType1 = pointerType->get_base();
	630	if ( baseType1->get_qualifiers() != defaultQualifiers ) return 0;
	631	SymTab::Indexer dummy;
	632	if ( ResolvExpr::typesCompatible( baseType1, paramType2, dummy ) ) {
	633	return baseType1;
	634	} // if
	635	} // if
	636	} // if
	637	} // if
	638	} // if
	639	return 0;
	640	}
[01aeade]	641
	642	void Pass1::findAssignOps( const std::list< TypeDecl *> &forall ) {
[ed1065c]	643	// what if a nested function uses an assignment operator?
	644	// assignOps.clear();
[01aeade]	645	for ( std::list< TypeDecl *>::const_iterator i = forall.begin(); i != forall.end(); ++i ) {
	646	for ( std::list< DeclarationWithType >::const_iterator assert = (i)->get_assertions().begin(); assert != (*i)->get_assertions().end(); ++assert ) {
	647	std::string typeName;
[dc12481]	648	if ( TypeInstType typeInst = isTypeInstAssignment( assert ) ) {
[1194734]	649	assignOps[ typeInst->get_name() ] = *assert;
[01aeade]	650	} // if
	651	} // for
	652	} // for
	653	}
	654
[82dd287]	655	DeclarationWithType Pass1::mutate( FunctionDecl functionDecl ) {
[89173242]	656	// if this is a assignment function, put it in the map for this scope
[dc12481]	657	if ( Type *assignedType = isAssignment( functionDecl ) ) {
	658	if ( ! dynamic_cast< TypeInstType* >( assignedType ) ) {
	659	scopedAssignOps.insert( assignedType, functionDecl );
[1194734]	660	}
	661	}
[b4cd03b7]	662
[e56cfdb0]	663	if ( functionDecl->get_statements() ) { // empty routine body ?
	664	doBeginScope();
[01aeade]	665	TyVarMap oldtyVars = scopeTyVars;
[ed1065c]	666	std::map< std::string, DeclarationWithType *> oldassignOps = assignOps;
[01aeade]	667	DeclarationWithType *oldRetval = retval;
	668	bool oldUseRetval = useRetval;
[e56cfdb0]	669
	670	// process polymorphic return value
[01aeade]	671	retval = 0;
[aadc9a4]	672	if ( isPolyRet( functionDecl->get_functionType() ) && functionDecl->get_linkage() == LinkageSpec::Cforall ) {
[01aeade]	673	retval = functionDecl->get_functionType()->get_returnVals().front();
[ae63a18]	674
[01aeade]	675	// give names to unnamed return values
	676	if ( retval->get_name() == "" ) {
	677	retval->set_name( "_retparm" );
	678	retval->set_linkage( LinkageSpec::C );
	679	} // if
	680	} // if
[ae63a18]	681
[e56cfdb0]	682	FunctionType *functionType = functionDecl->get_functionType();
[01aeade]	683	makeTyVarMap( functionDecl->get_functionType(), scopeTyVars );
	684	findAssignOps( functionDecl->get_functionType()->get_forall() );
[e56cfdb0]	685
	686	std::list< DeclarationWithType *> &paramList = functionType->get_parameters();
	687	std::list< FunctionType *> functions;
	688	for ( std::list< TypeDecl *>::iterator tyVar = functionType->get_forall().begin(); tyVar != functionType->get_forall().end(); ++tyVar ) {
	689	for ( std::list< DeclarationWithType >::iterator assert = (tyVar)->get_assertions().begin(); assert != (*tyVar)->get_assertions().end(); ++assert ) {
	690	findFunction( (*assert)->get_type(), functions, scopeTyVars, needsAdapter );
	691	} // for
	692	} // for
	693	for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) {
	694	findFunction( (*arg)->get_type(), functions, scopeTyVars, needsAdapter );
	695	} // for
[b4cd03b7]	696
[e56cfdb0]	697	for ( std::list< FunctionType *>::iterator funType = functions.begin(); funType != functions.end(); ++funType ) {
[bdf1954]	698	std::string mangleName = mangleAdapterName( *funType, scopeTyVars );
[e56cfdb0]	699	if ( adapters.find( mangleName ) == adapters.end() ) {
	700	std::string adapterName = makeAdapterName( mangleName );
	701	adapters.insert( std::pair< std::string, DeclarationWithType >( mangleName, new ObjectDecl( adapterName, DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new PointerType( Type::Qualifiers(), makeAdapterType( funType, scopeTyVars ) ), 0 ) ) );
	702	} // if
	703	} // for
	704
[01aeade]	705	functionDecl->set_statements( functionDecl->get_statements()->acceptMutator( *this ) );
[ae63a18]	706
[01aeade]	707	scopeTyVars = oldtyVars;
[ed1065c]	708	assignOps = oldassignOps;
[e56cfdb0]	709	// std::cerr << "end FunctionDecl: ";
	710	// for ( TyVarMap::iterator i = scopeTyVars.begin(); i != scopeTyVars.end(); ++i ) {
	711	// std::cerr << i->first << " ";
	712	// }
	713	// std::cerr << "\n";
[01aeade]	714	retval = oldRetval;
	715	useRetval = oldUseRetval;
[e56cfdb0]	716	doEndScope();
[01aeade]	717	} // if
	718	return functionDecl;
	719	}
[6c3744e]	720
[01aeade]	721	TypeDecl Pass1::mutate( TypeDecl typeDecl ) {
	722	scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind();
	723	return Mutator::mutate( typeDecl );
	724	}
[6c3744e]	725
[01aeade]	726	Expression Pass1::mutate( CommaExpr commaExpr ) {
	727	bool oldUseRetval = useRetval;
	728	useRetval = false;
	729	commaExpr->set_arg1( maybeMutate( commaExpr->get_arg1(), *this ) );
	730	useRetval = oldUseRetval;
	731	commaExpr->set_arg2( maybeMutate( commaExpr->get_arg2(), *this ) );
	732	return commaExpr;
	733	}
[6c3744e]	734
[01aeade]	735	Expression Pass1::mutate( ConditionalExpr condExpr ) {
	736	bool oldUseRetval = useRetval;
	737	useRetval = false;
	738	condExpr->set_arg1( maybeMutate( condExpr->get_arg1(), *this ) );
	739	useRetval = oldUseRetval;
	740	condExpr->set_arg2( maybeMutate( condExpr->get_arg2(), *this ) );
	741	condExpr->set_arg3( maybeMutate( condExpr->get_arg3(), *this ) );
	742	return condExpr;
[6c3744e]	743
[01aeade]	744	}
[6c3744e]	745
[5c52b06]	746	void Pass1::passArgTypeVars( ApplicationExpr appExpr, Type parmType, Type argBaseType, std::list< Expression >::iterator &arg, const TyVarMap &exprTyVars, std::set< std::string > &seenTypes ) {
	747	Type *polyBase = hasPolyBase( parmType, exprTyVars );
	748	if ( polyBase && ! dynamic_cast< TypeInstType* >( polyBase ) ) {
	749	std::string sizeName = sizeofName( polyBase );
	750	if ( seenTypes.count( sizeName ) ) return;
	751
	752	arg = appExpr->get_args().insert( arg, new SizeofExpr( argBaseType->clone() ) );
	753	arg++;
	754	arg = appExpr->get_args().insert( arg, new AlignofExpr( argBaseType->clone() ) );
	755	arg++;
	756	if ( dynamic_cast< StructInstType* >( polyBase ) ) {
	757	if ( StructInstType argBaseStructType = dynamic_cast< StructInstType >( argBaseType ) ) {
[89173242]	758	// zero-length arrays are forbidden by C, so don't pass offset for empty struct
	759	if ( ! argBaseStructType->get_baseStruct()->get_members().empty() ) {
[d75038c]	760	arg = appExpr->get_args().insert( arg, new OffsetPackExpr( argBaseStructType->clone() ) );
[89173242]	761	arg++;
	762	}
[5c52b06]	763	} else {
	764	throw SemanticError( "Cannot pass non-struct type for generic struct" );
	765	}
	766	}
	767
	768	seenTypes.insert( sizeName );
	769	}
	770	}
	771
	772	void Pass1::passTypeVars( ApplicationExpr appExpr, ReferenceToType polyRetType, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars ) {
[7754cde]	773	// pass size/align for type variables
[01aeade]	774	for ( TyVarMap::const_iterator tyParm = exprTyVars.begin(); tyParm != exprTyVars.end(); ++tyParm ) {
	775	ResolvExpr::EqvClass eqvClass;
	776	assert( env );
	777	if ( tyParm->second == TypeDecl::Any ) {
	778	Type *concrete = env->lookup( tyParm->first );
	779	if ( concrete ) {
	780	arg = appExpr->get_args().insert( arg, new SizeofExpr( concrete->clone() ) );
	781	arg++;
[db0b3ce]	782	arg = appExpr->get_args().insert( arg, new AlignofExpr( concrete->clone() ) );
	783	arg++;
[01aeade]	784	} else {
	785	throw SemanticError( "unbound type variable in application ", appExpr );
	786	} // if
	787	} // if
	788	} // for
[7754cde]	789
	790	// add size/align for generic types to parameter list
	791	if ( appExpr->get_function()->get_results().empty() ) return;
	792	FunctionType *funcType = getFunctionType( appExpr->get_function()->get_results().front() );
	793	assert( funcType );
[ae63a18]	794
[7754cde]	795	std::list< DeclarationWithType* >::const_iterator fnParm = funcType->get_parameters().begin();
	796	std::list< Expression* >::const_iterator fnArg = arg;
[69911c11]	797	std::set< std::string > seenTypes; //< names for generic types we've seen
[7754cde]	798
[5c52b06]	799	// a polymorphic return type may need to be added to the argument list
	800	if ( polyRetType ) {
	801	Type *concRetType = replaceWithConcrete( appExpr, polyRetType );
	802	passArgTypeVars( appExpr, polyRetType, concRetType, arg, exprTyVars, seenTypes );
	803	}
	804
	805	// add type information args for presently unseen types in parameter list
	806	for ( ; fnParm != funcType->get_parameters().end() && fnArg != appExpr->get_args().end(); ++fnParm, ++fnArg ) {
	807	VariableExpr fnArgBase = getBaseVar( fnArg );
	808	if ( ! fnArgBase \|\| fnArgBase->get_results().empty() ) continue;
	809	passArgTypeVars( appExpr, (*fnParm)->get_type(), fnArgBase->get_results().front(), arg, exprTyVars, seenTypes );
[7754cde]	810	}
[01aeade]	811	}
[6c3744e]	812
[01aeade]	813	ObjectDecl Pass1::makeTemporary( Type type ) {
[68cd1ce]	814	ObjectDecl *newObj = new ObjectDecl( tempNamer.newName(), DeclarationNode::NoStorageClass, LinkageSpec::C, 0, type, 0 );
[01aeade]	815	stmtsToAdd.push_back( new DeclStmt( noLabels, newObj ) );
	816	return newObj;
	817	}
[6c3744e]	818
[01aeade]	819	Expression Pass1::addRetParam( ApplicationExpr appExpr, FunctionType function, Type retType, std::list< Expression *>::iterator &arg ) {
[cf16f94]	820	// *** Code Removal *** After introducing a temporary variable for all return expressions, the following code appears superfluous.
	821	// if ( useRetval ) {
	822	// assert( retval );
	823	// arg = appExpr->get_args().insert( arg, new VariableExpr( retval ) );
	824	// arg++;
	825	// } else {
	826
	827	// Create temporary to hold return value of polymorphic function and produce that temporary as a result
	828	// using a comma expression. Possibly change comma expression into statement expression "{}" for multiple
	829	// return values.
	830	ObjectDecl *newObj = makeTemporary( retType->clone() );
	831	Expression *paramExpr = new VariableExpr( newObj );
[5c52b06]	832
	833	// If the type of the temporary is not polymorphic, box temporary by taking its address;
	834	// otherwise the temporary is already boxed and can be used directly.
[5f6c42c]	835	if ( ! isPolyType( newObj->get_type(), scopeTyVars, env ) ) {
[cf16f94]	836	paramExpr = new AddressExpr( paramExpr );
[01aeade]	837	} // if
[cf16f94]	838	arg = appExpr->get_args().insert( arg, paramExpr ); // add argument to function call
	839	arg++;
	840	// Build a comma expression to call the function and emulate a normal return.
	841	CommaExpr *commaExpr = new CommaExpr( appExpr, new VariableExpr( newObj ) );
	842	commaExpr->set_env( appExpr->get_env() );
	843	appExpr->set_env( 0 );
	844	return commaExpr;
	845	// } // if
	846	// return appExpr;
[01aeade]	847	}
[6c3744e]	848
[48ca586]	849	void Pass1::replaceParametersWithConcrete( ApplicationExpr appExpr, std::list< Expression >& params ) {
	850	for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
	851	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
	852	assert(paramType && "Aggregate parameters should be type expressions");
	853	paramType->set_type( replaceWithConcrete( appExpr, paramType->get_type(), false ) );
	854	}
	855	}
[b4cd03b7]	856
[48ca586]	857	Type Pass1::replaceWithConcrete( ApplicationExpr appExpr, Type *type, bool doClone ) {
	858	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( type ) ) {
	859	Type *concrete = env->lookup( typeInst->get_name() );
	860	if ( concrete == 0 ) {
	861	throw SemanticError( "Unbound type variable " + typeInst->get_name() + " in ", appExpr );
	862	} // if
	863	return concrete;
	864	} else if ( StructInstType structType = dynamic_cast< StructInstType >( type ) ) {
	865	if ( doClone ) {
	866	structType = structType->clone();
	867	}
	868	replaceParametersWithConcrete( appExpr, structType->get_parameters() );
	869	return structType;
	870	} else if ( UnionInstType unionType = dynamic_cast< UnionInstType >( type ) ) {
	871	if ( doClone ) {
	872	unionType = unionType->clone();
	873	}
	874	replaceParametersWithConcrete( appExpr, unionType->get_parameters() );
	875	return unionType;
	876	}
	877	return type;
	878	}
	879
	880	Expression Pass1::addPolyRetParam( ApplicationExpr appExpr, FunctionType function, ReferenceToType polyType, std::list< Expression *>::iterator &arg ) {
[01aeade]	881	assert( env );
[48ca586]	882	Type *concrete = replaceWithConcrete( appExpr, polyType );
[5c52b06]	883	// add out-parameter for return value
[01aeade]	884	return addRetParam( appExpr, function, concrete, arg );
	885	}
[6c3744e]	886
[01aeade]	887	Expression Pass1::applyAdapter( ApplicationExpr appExpr, FunctionType function, std::list< Expression >::iterator &arg, const TyVarMap &tyVars ) {
	888	Expression *ret = appExpr;
[ffad73a]	889	if ( ! function->get_returnVals().empty() && isPolyType( function->get_returnVals().front()->get_type(), tyVars ) ) {
[01aeade]	890	ret = addRetParam( appExpr, function, function->get_returnVals().front()->get_type(), arg );
	891	} // if
[bdf1954]	892	std::string mangleName = mangleAdapterName( function, tyVars );
[01aeade]	893	std::string adapterName = makeAdapterName( mangleName );
[b1a6d6b]	894
[b4cd03b7]	895	// cast adaptee to void (*)(), since it may have any type inside a polymorphic function
	896	Type * adapteeType = new PointerType( Type::Qualifiers(), new FunctionType( Type::Qualifiers(), true ) );
	897	appExpr->get_args().push_front( new CastExpr( appExpr->get_function(), adapteeType ) );
[01aeade]	898	appExpr->set_function( new NameExpr( adapterName ) );
[ae63a18]	899
[01aeade]	900	return ret;
	901	}
[6c3744e]	902
[01aeade]	903	void Pass1::boxParam( Type param, Expression &arg, const TyVarMap &exprTyVars ) {
	904	assert( ! arg->get_results().empty() );
[1cced28]	905	if ( isPolyType( param, exprTyVars ) ) {
[9407ed8]	906	if ( isPolyType( arg->get_results().front() ) ) {
	907	// if the argument's type is polymorphic, we don't need to box again!
[01aeade]	908	return;
	909	} else if ( arg->get_results().front()->get_isLvalue() ) {
[b3ab8f0]	910	// VariableExpr and MemberExpr are lvalues; need to check this isn't coming from the second arg of a comma expression though (not an lvalue)
	911	if ( CommaExpr commaArg = dynamic_cast< CommaExpr >( arg ) ) {
[bc1ab61]	912	commaArg->set_arg2( new AddressExpr( commaArg->get_arg2() ) );
[b3ab8f0]	913	} else {
	914	arg = new AddressExpr( arg );
	915	}
[01aeade]	916	} else {
[bd85400]	917	// use type computed in unification to declare boxed variables
	918	Type * newType = param->clone();
	919	if ( env ) env->apply( newType );
	920	ObjectDecl *newObj = new ObjectDecl( tempNamer.newName(), DeclarationNode::NoStorageClass, LinkageSpec::C, 0, newType, 0 );
[f6d7e0f]	921	newObj->get_type()->get_qualifiers() = Type::Qualifiers(); // TODO: is this right???
[01aeade]	922	stmtsToAdd.push_back( new DeclStmt( noLabels, newObj ) );
	923	UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );
	924	assign->get_args().push_back( new VariableExpr( newObj ) );
	925	assign->get_args().push_back( arg );
	926	stmtsToAdd.push_back( new ExprStmt( noLabels, assign ) );
	927	arg = new AddressExpr( new VariableExpr( newObj ) );
	928	} // if
	929	} // if
	930	}
[6c3744e]	931
[b4cd03b7]	932	/// cast parameters to polymorphic functions so that types are replaced with
	933	/// void * if they are type parameters in the formal type.
	934	/// this gets rid of warnings from gcc.
[01aeade]	935	void addCast( Expression &actual, Type formal, const TyVarMap &tyVars ) {
[b4cd03b7]	936	Type * newType = formal->clone();
	937	if ( getFunctionType( newType ) ) {
	938	newType = ScrubTyVars::scrub( newType, tyVars );
[01aeade]	939	actual = new CastExpr( actual, newType );
	940	} // if
	941	}
[6c3744e]	942
[01aeade]	943	void Pass1::boxParams( ApplicationExpr appExpr, FunctionType function, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars ) {
	944	for ( std::list< DeclarationWithType *>::const_iterator param = function->get_parameters().begin(); param != function->get_parameters().end(); ++param, ++arg ) {
	945	assert( arg != appExpr->get_args().end() );
	946	addCast( arg, (param)->get_type(), exprTyVars );
	947	boxParam( (param)->get_type(), arg, exprTyVars );
	948	} // for
	949	}
[6c3744e]	950
[01aeade]	951	void Pass1::addInferredParams( ApplicationExpr appExpr, FunctionType functionType, std::list< Expression *>::iterator &arg, const TyVarMap &tyVars ) {
	952	std::list< Expression *>::iterator cur = arg;
	953	for ( std::list< TypeDecl *>::iterator tyVar = functionType->get_forall().begin(); tyVar != functionType->get_forall().end(); ++tyVar ) {
	954	for ( std::list< DeclarationWithType >::iterator assert = (tyVar)->get_assertions().begin(); assert != (*tyVar)->get_assertions().end(); ++assert ) {
	955	InferredParams::const_iterator inferParam = appExpr->get_inferParams().find( (*assert)->get_uniqueId() );
[698664b3]	956	assert( inferParam != appExpr->get_inferParams().end() && "NOTE: Explicit casts of polymorphic functions to compatible monomorphic functions are currently unsupported" );
[01aeade]	957	Expression *newExpr = inferParam->second.expr->clone();
	958	addCast( newExpr, (*assert)->get_type(), tyVars );
	959	boxParam( (*assert)->get_type(), newExpr, tyVars );
	960	appExpr->get_args().insert( cur, newExpr );
	961	} // for
	962	} // for
	963	}
[6c3744e]	964
[01aeade]	965	void makeRetParm( FunctionType *funcType ) {
	966	DeclarationWithType *retParm = funcType->get_returnVals().front();
[6c3744e]	967
[01aeade]	968	// make a new parameter that is a pointer to the type of the old return value
	969	retParm->set_type( new PointerType( Type::Qualifiers(), retParm->get_type() ) );
	970	funcType->get_parameters().push_front( retParm );
[6c3744e]	971
[01aeade]	972	// we don't need the return value any more
	973	funcType->get_returnVals().clear();
	974	}
[6c3744e]	975
[01aeade]	976	FunctionType makeAdapterType( FunctionType adaptee, const TyVarMap &tyVars ) {
	977	// actually make the adapter type
	978	FunctionType *adapter = adaptee->clone();
[ffad73a]	979	if ( ! adapter->get_returnVals().empty() && isPolyType( adapter->get_returnVals().front()->get_type(), tyVars ) ) {
[01aeade]	980	makeRetParm( adapter );
	981	} // if
[68cd1ce]	982	adapter->get_parameters().push_front( new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new PointerType( Type::Qualifiers(), new FunctionType( Type::Qualifiers(), true ) ), 0 ) );
[01aeade]	983	return adapter;
	984	}
[6c3744e]	985
[01aeade]	986	Expression makeAdapterArg( DeclarationWithType param, DeclarationWithType arg, DeclarationWithType realParam, const TyVarMap &tyVars ) {
	987	assert( param );
	988	assert( arg );
[ffad73a]	989	if ( isPolyType( realParam->get_type(), tyVars ) ) {
[30aeb27]	990	if ( ! isPolyType( arg->get_type() ) ) {
[e56cfdb0]	991	UntypedExpr deref = new UntypedExpr( new NameExpr( "?" ) );
	992	deref->get_args().push_back( new CastExpr( new VariableExpr( param ), new PointerType( Type::Qualifiers(), arg->get_type()->clone() ) ) );
	993	deref->get_results().push_back( arg->get_type()->clone() );
	994	return deref;
	995	} // if
[01aeade]	996	} // if
	997	return new VariableExpr( param );
	998	}
[6c3744e]	999
[01aeade]	1000	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 ) {
	1001	UniqueName paramNamer( "_p" );
	1002	for ( ; param != paramEnd; ++param, ++arg, ++realParam ) {
	1003	if ( (*param)->get_name() == "" ) {
	1004	(*param)->set_name( paramNamer.newName() );
	1005	(*param)->set_linkage( LinkageSpec::C );
	1006	} // if
	1007	adapteeApp->get_args().push_back( makeAdapterArg( param, arg, *realParam, tyVars ) );
	1008	} // for
	1009	}
[6c3744e]	1010
[01aeade]	1011	FunctionDecl Pass1::makeAdapter( FunctionType adaptee, FunctionType *realType, const std::string &mangleName, const TyVarMap &tyVars ) {
	1012	FunctionType *adapterType = makeAdapterType( adaptee, tyVars );
	1013	adapterType = ScrubTyVars::scrub( adapterType, tyVars );
	1014	DeclarationWithType *adapteeDecl = adapterType->get_parameters().front();
	1015	adapteeDecl->set_name( "_adaptee" );
	1016	ApplicationExpr *adapteeApp = new ApplicationExpr( new CastExpr( new VariableExpr( adapteeDecl ), new PointerType( Type::Qualifiers(), realType ) ) );
	1017	Statement *bodyStmt;
[ae63a18]	1018
[01aeade]	1019	std::list< TypeDecl *>::iterator tyArg = realType->get_forall().begin();
	1020	std::list< TypeDecl *>::iterator tyParam = adapterType->get_forall().begin();
	1021	std::list< TypeDecl *>::iterator realTyParam = adaptee->get_forall().begin();
	1022	for ( ; tyParam != adapterType->get_forall().end(); ++tyArg, ++tyParam, ++realTyParam ) {
	1023	assert( tyArg != realType->get_forall().end() );
	1024	std::list< DeclarationWithType >::iterator assertArg = (tyArg)->get_assertions().begin();
	1025	std::list< DeclarationWithType >::iterator assertParam = (tyParam)->get_assertions().begin();
	1026	std::list< DeclarationWithType >::iterator realAssertParam = (realTyParam)->get_assertions().begin();
	1027	for ( ; assertParam != (*tyParam)->get_assertions().end(); ++assertArg, ++assertParam, ++realAssertParam ) {
	1028	assert( assertArg != (*tyArg)->get_assertions().end() );
	1029	adapteeApp->get_args().push_back( makeAdapterArg( assertParam, assertArg, *realAssertParam, tyVars ) );
	1030	} // for
	1031	} // for
[ae63a18]	1032
[01aeade]	1033	std::list< DeclarationWithType *>::iterator arg = realType->get_parameters().begin();
	1034	std::list< DeclarationWithType *>::iterator param = adapterType->get_parameters().begin();
	1035	std::list< DeclarationWithType *>::iterator realParam = adaptee->get_parameters().begin();
	1036	param++; // skip adaptee parameter
	1037	if ( realType->get_returnVals().empty() ) {
	1038	addAdapterParams( adapteeApp, arg, param, adapterType->get_parameters().end(), realParam, tyVars );
	1039	bodyStmt = new ExprStmt( noLabels, adapteeApp );
[ffad73a]	1040	} else if ( isPolyType( adaptee->get_returnVals().front()->get_type(), tyVars ) ) {
[01aeade]	1041	if ( (*param)->get_name() == "" ) {
	1042	(*param)->set_name( "_ret" );
	1043	(*param)->set_linkage( LinkageSpec::C );
	1044	} // if
	1045	UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );
	1046	UntypedExpr deref = new UntypedExpr( new NameExpr( "?" ) );
	1047	deref->get_args().push_back( new CastExpr( new VariableExpr( *param++ ), new PointerType( Type::Qualifiers(), realType->get_returnVals().front()->get_type()->clone() ) ) );
	1048	assign->get_args().push_back( deref );
	1049	addAdapterParams( adapteeApp, arg, param, adapterType->get_parameters().end(), realParam, tyVars );
	1050	assign->get_args().push_back( adapteeApp );
	1051	bodyStmt = new ExprStmt( noLabels, assign );
	1052	} else {
	1053	// adapter for a function that returns a monomorphic value
	1054	addAdapterParams( adapteeApp, arg, param, adapterType->get_parameters().end(), realParam, tyVars );
	1055	bodyStmt = new ReturnStmt( noLabels, adapteeApp );
	1056	} // if
	1057	CompoundStmt *adapterBody = new CompoundStmt( noLabels );
	1058	adapterBody->get_kids().push_back( bodyStmt );
	1059	std::string adapterName = makeAdapterName( mangleName );
[de62360d]	1060	return new FunctionDecl( adapterName, DeclarationNode::NoStorageClass, LinkageSpec::C, adapterType, adapterBody, false, false );
[01aeade]	1061	}
[6c3744e]	1062
[c29d9ce]	1063	void Pass1::passAdapters( ApplicationExpr * appExpr, FunctionType * functionType, const TyVarMap & exprTyVars ) {
[e497c1d]	1064	// collect a list of function types passed as parameters or implicit parameters (assertions)
[01aeade]	1065	std::list< DeclarationWithType *> &paramList = functionType->get_parameters();
	1066	std::list< FunctionType *> functions;
	1067	for ( std::list< TypeDecl *>::iterator tyVar = functionType->get_forall().begin(); tyVar != functionType->get_forall().end(); ++tyVar ) {
	1068	for ( std::list< DeclarationWithType >::iterator assert = (tyVar)->get_assertions().begin(); assert != (*tyVar)->get_assertions().end(); ++assert ) {
	1069	findFunction( (*assert)->get_type(), functions, exprTyVars, needsAdapter );
	1070	} // for
	1071	} // for
	1072	for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) {
	1073	findFunction( (*arg)->get_type(), functions, exprTyVars, needsAdapter );
	1074	} // for
[e497c1d]	1075
[e56cfdb0]	1076	// parameter function types for which an appropriate adapter has been generated. we cannot use the types
	1077	// after applying substitutions, since two different parameter types may be unified to the same type
[01aeade]	1078	std::set< std::string > adaptersDone;
[e497c1d]	1079
[01aeade]	1080	for ( std::list< FunctionType *>::iterator funType = functions.begin(); funType != functions.end(); ++funType ) {
[c29d9ce]	1081	FunctionType originalFunction = (funType)->clone();
[01aeade]	1082	FunctionType realFunction = (funType)->clone();
	1083	std::string mangleName = SymTab::Mangler::mangle( realFunction );
[e497c1d]	1084
[e56cfdb0]	1085	// only attempt to create an adapter or pass one as a parameter if we haven't already done so for this
	1086	// pre-substitution parameter function type.
[01aeade]	1087	if ( adaptersDone.find( mangleName ) == adaptersDone.end() ) {
[e497c1d]	1088	adaptersDone.insert( adaptersDone.begin(), mangleName );
[ae63a18]	1089
[e56cfdb0]	1090	// apply substitution to type variables to figure out what the adapter's type should look like
[e497c1d]	1091	assert( env );
	1092	env->apply( realFunction );
[ae63a18]	1093	mangleName = SymTab::Mangler::mangle( realFunction );
[bdf1954]	1094	mangleName += makePolyMonoSuffix( originalFunction, exprTyVars );
[e497c1d]	1095
[6635c74]	1096	typedef ScopedMap< std::string, DeclarationWithType* >::iterator AdapterIter;
	1097	AdapterIter adapter = adapters.find( mangleName );
[e56cfdb0]	1098	if ( adapter == adapters.end() ) {
	1099	// adapter has not been created yet in the current scope, so define it
	1100	FunctionDecl newAdapter = makeAdapter( funType, realFunction, mangleName, exprTyVars );
[6635c74]	1101	std::pair< AdapterIter, bool > answer = adapters.insert( std::pair< std::string, DeclarationWithType *>( mangleName, newAdapter ) );
	1102	adapter = answer.first;
[e56cfdb0]	1103	stmtsToAdd.push_back( new DeclStmt( noLabels, newAdapter ) );
[c29d9ce]	1104	} // if
[e56cfdb0]	1105	assert( adapter != adapters.end() );
	1106
	1107	// add the appropriate adapter as a parameter
	1108	appExpr->get_args().push_front( new VariableExpr( adapter->second ) );
[01aeade]	1109	} // if
	1110	} // for
[e56cfdb0]	1111	} // passAdapters
[6c3744e]	1112
[78dd0da]	1113	Expression makeIncrDecrExpr( ApplicationExpr appExpr, Type *polyType, bool isIncr ) {
[01aeade]	1114	NameExpr *opExpr;
	1115	if ( isIncr ) {
	1116	opExpr = new NameExpr( "?+=?" );
	1117	} else {
	1118	opExpr = new NameExpr( "?-=?" );
[6c3744e]	1119	} // if
[01aeade]	1120	UntypedExpr *addAssign = new UntypedExpr( opExpr );
	1121	if ( AddressExpr address = dynamic_cast< AddressExpr >( appExpr->get_args().front() ) ) {
	1122	addAssign->get_args().push_back( address->get_arg() );
	1123	} else {
	1124	addAssign->get_args().push_back( appExpr->get_args().front() );
[6c3744e]	1125	} // if
[78dd0da]	1126	addAssign->get_args().push_back( new NameExpr( sizeofName( polyType ) ) );
[01aeade]	1127	addAssign->get_results().front() = appExpr->get_results().front()->clone();
	1128	if ( appExpr->get_env() ) {
	1129	addAssign->set_env( appExpr->get_env() );
[6c3744e]	1130	appExpr->set_env( 0 );
	1131	} // if
[01aeade]	1132	appExpr->get_args().clear();
	1133	delete appExpr;
	1134	return addAssign;
	1135	}
	1136
	1137	Expression Pass1::handleIntrinsics( ApplicationExpr appExpr ) {
	1138	if ( VariableExpr varExpr = dynamic_cast< VariableExpr >( appExpr->get_function() ) ) {
	1139	if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic ) {
	1140	if ( varExpr->get_var()->get_name() == "?[?]" ) {
	1141	assert( ! appExpr->get_results().empty() );
	1142	assert( appExpr->get_args().size() == 2 );
[ffad73a]	1143	Type *baseType1 = isPolyPtr( appExpr->get_args().front()->get_results().front(), scopeTyVars, env );
	1144	Type *baseType2 = isPolyPtr( appExpr->get_args().back()->get_results().front(), scopeTyVars, env );
[ae63a18]	1145	assert( ! baseType1 \|\| ! baseType2 ); // the arguments cannot both be polymorphic pointers
[01aeade]	1146	UntypedExpr *ret = 0;
[ae63a18]	1147	if ( baseType1 \|\| baseType2 ) { // one of the arguments is a polymorphic pointer
[01aeade]	1148	ret = new UntypedExpr( new NameExpr( "?+?" ) );
	1149	} // if
[ffad73a]	1150	if ( baseType1 ) {
[01aeade]	1151	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1152	multiply->get_args().push_back( appExpr->get_args().back() );
[ffad73a]	1153	multiply->get_args().push_back( new NameExpr( sizeofName( baseType1 ) ) );
[01aeade]	1154	ret->get_args().push_back( appExpr->get_args().front() );
	1155	ret->get_args().push_back( multiply );
[ffad73a]	1156	} else if ( baseType2 ) {
[01aeade]	1157	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1158	multiply->get_args().push_back( appExpr->get_args().front() );
[ffad73a]	1159	multiply->get_args().push_back( new NameExpr( sizeofName( baseType2 ) ) );
[01aeade]	1160	ret->get_args().push_back( multiply );
	1161	ret->get_args().push_back( appExpr->get_args().back() );
	1162	} // if
[ffad73a]	1163	if ( baseType1 \|\| baseType2 ) {
[01aeade]	1164	ret->get_results().push_front( appExpr->get_results().front()->clone() );
	1165	if ( appExpr->get_env() ) {
	1166	ret->set_env( appExpr->get_env() );
	1167	appExpr->set_env( 0 );
	1168	} // if
	1169	appExpr->get_args().clear();
	1170	delete appExpr;
	1171	return ret;
	1172	} // if
	1173	} else if ( varExpr->get_var()->get_name() == "*?" ) {
	1174	assert( ! appExpr->get_results().empty() );
	1175	assert( ! appExpr->get_args().empty() );
[ffad73a]	1176	if ( isPolyType( appExpr->get_results().front(), scopeTyVars, env ) ) {
[01aeade]	1177	Expression *ret = appExpr->get_args().front();
	1178	delete ret->get_results().front();
	1179	ret->get_results().front() = appExpr->get_results().front()->clone();
	1180	if ( appExpr->get_env() ) {
	1181	ret->set_env( appExpr->get_env() );
	1182	appExpr->set_env( 0 );
	1183	} // if
	1184	appExpr->get_args().clear();
	1185	delete appExpr;
	1186	return ret;
	1187	} // if
	1188	} else if ( varExpr->get_var()->get_name() == "?++" \|\| varExpr->get_var()->get_name() == "?--" ) {
	1189	assert( ! appExpr->get_results().empty() );
	1190	assert( appExpr->get_args().size() == 1 );
[ffad73a]	1191	if ( Type *baseType = isPolyPtr( appExpr->get_results().front(), scopeTyVars, env ) ) {
[01aeade]	1192	Type *tempType = appExpr->get_results().front()->clone();
	1193	if ( env ) {
	1194	env->apply( tempType );
	1195	} // if
	1196	ObjectDecl *newObj = makeTemporary( tempType );
	1197	VariableExpr *tempExpr = new VariableExpr( newObj );
	1198	UntypedExpr *assignExpr = new UntypedExpr( new NameExpr( "?=?" ) );
	1199	assignExpr->get_args().push_back( tempExpr->clone() );
	1200	if ( AddressExpr address = dynamic_cast< AddressExpr >( appExpr->get_args().front() ) ) {
	1201	assignExpr->get_args().push_back( address->get_arg()->clone() );
	1202	} else {
	1203	assignExpr->get_args().push_back( appExpr->get_args().front()->clone() );
	1204	} // if
[ffad73a]	1205	CommaExpr *firstComma = new CommaExpr( assignExpr, makeIncrDecrExpr( appExpr, baseType, varExpr->get_var()->get_name() == "?++" ) );
[01aeade]	1206	return new CommaExpr( firstComma, tempExpr );
	1207	} // if
	1208	} else if ( varExpr->get_var()->get_name() == "++?" \|\| varExpr->get_var()->get_name() == "--?" ) {
	1209	assert( ! appExpr->get_results().empty() );
	1210	assert( appExpr->get_args().size() == 1 );
[ffad73a]	1211	if ( Type *baseType = isPolyPtr( appExpr->get_results().front(), scopeTyVars, env ) ) {
	1212	return makeIncrDecrExpr( appExpr, baseType, varExpr->get_var()->get_name() == "++?" );
[01aeade]	1213	} // if
	1214	} else if ( varExpr->get_var()->get_name() == "?+?" \|\| varExpr->get_var()->get_name() == "?-?" ) {
	1215	assert( ! appExpr->get_results().empty() );
	1216	assert( appExpr->get_args().size() == 2 );
[ffad73a]	1217	Type *baseType1 = isPolyPtr( appExpr->get_args().front()->get_results().front(), scopeTyVars, env );
	1218	Type *baseType2 = isPolyPtr( appExpr->get_args().back()->get_results().front(), scopeTyVars, env );
	1219	if ( baseType1 && baseType2 ) {
[01aeade]	1220	UntypedExpr *divide = new UntypedExpr( new NameExpr( "?/?" ) );
	1221	divide->get_args().push_back( appExpr );
[ffad73a]	1222	divide->get_args().push_back( new NameExpr( sizeofName( baseType1 ) ) );
[01aeade]	1223	divide->get_results().push_front( appExpr->get_results().front()->clone() );
	1224	if ( appExpr->get_env() ) {
	1225	divide->set_env( appExpr->get_env() );
	1226	appExpr->set_env( 0 );
	1227	} // if
	1228	return divide;
[ffad73a]	1229	} else if ( baseType1 ) {
[01aeade]	1230	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1231	multiply->get_args().push_back( appExpr->get_args().back() );
[ffad73a]	1232	multiply->get_args().push_back( new NameExpr( sizeofName( baseType1 ) ) );
[01aeade]	1233	appExpr->get_args().back() = multiply;
[ffad73a]	1234	} else if ( baseType2 ) {
[01aeade]	1235	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1236	multiply->get_args().push_back( appExpr->get_args().front() );
[ffad73a]	1237	multiply->get_args().push_back( new NameExpr( sizeofName( baseType2 ) ) );
[01aeade]	1238	appExpr->get_args().front() = multiply;
	1239	} // if
	1240	} else if ( varExpr->get_var()->get_name() == "?+=?" \|\| varExpr->get_var()->get_name() == "?-=?" ) {
	1241	assert( ! appExpr->get_results().empty() );
	1242	assert( appExpr->get_args().size() == 2 );
[ffad73a]	1243	Type *baseType = isPolyPtr( appExpr->get_results().front(), scopeTyVars, env );
	1244	if ( baseType ) {
[01aeade]	1245	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1246	multiply->get_args().push_back( appExpr->get_args().back() );
[ffad73a]	1247	multiply->get_args().push_back( new NameExpr( sizeofName( baseType ) ) );
[01aeade]	1248	appExpr->get_args().back() = multiply;
	1249	} // if
	1250	} // if
	1251	return appExpr;
	1252	} // if
[6c3744e]	1253	} // if
[01aeade]	1254	return 0;
	1255	}
[6c3744e]	1256
[01aeade]	1257	Expression Pass1::mutate( ApplicationExpr appExpr ) {
[e56cfdb0]	1258	// std::cerr << "mutate appExpr: ";
	1259	// for ( TyVarMap::iterator i = scopeTyVars.begin(); i != scopeTyVars.end(); ++i ) {
	1260	// std::cerr << i->first << " ";
	1261	// }
	1262	// std::cerr << "\n";
[01aeade]	1263	bool oldUseRetval = useRetval;
	1264	useRetval = false;
	1265	appExpr->get_function()->acceptMutator( *this );
	1266	mutateAll( appExpr->get_args(), *this );
	1267	useRetval = oldUseRetval;
[ae63a18]	1268
[01aeade]	1269	assert( ! appExpr->get_function()->get_results().empty() );
	1270	PointerType pointer = dynamic_cast< PointerType >( appExpr->get_function()->get_results().front() );
	1271	assert( pointer );
	1272	FunctionType function = dynamic_cast< FunctionType >( pointer->get_base() );
	1273	assert( function );
[ae63a18]	1274
[01aeade]	1275	if ( Expression *newExpr = handleIntrinsics( appExpr ) ) {
	1276	return newExpr;
	1277	} // if
[ae63a18]	1278
[01aeade]	1279	Expression *ret = appExpr;
[ae63a18]	1280
[01aeade]	1281	std::list< Expression *>::iterator arg = appExpr->get_args().begin();
	1282	std::list< Expression *>::iterator paramBegin = appExpr->get_args().begin();
[ae63a18]	1283
[5c52b06]	1284	TyVarMap exprTyVars;
	1285	makeTyVarMap( function, exprTyVars );
[dc12481]	1286	ReferenceToType *polyRetType = isPolyRet( function );
[5c52b06]	1287
[dc12481]	1288	if ( polyRetType ) {
[5c52b06]	1289	ret = addPolyRetParam( appExpr, function, polyRetType, arg );
[01aeade]	1290	} else if ( needsAdapter( function, scopeTyVars ) ) {
[e56cfdb0]	1291	// std::cerr << "needs adapter: ";
	1292	// for ( TyVarMap::iterator i = scopeTyVars.begin(); i != scopeTyVars.end(); ++i ) {
	1293	// std::cerr << i->first << " ";
	1294	// }
	1295	// std::cerr << "\n";
[01aeade]	1296	// change the application so it calls the adapter rather than the passed function
	1297	ret = applyAdapter( appExpr, function, arg, scopeTyVars );
	1298	} // if
	1299	arg = appExpr->get_args().begin();
[ae63a18]	1300
[5c52b06]	1301	passTypeVars( appExpr, polyRetType, arg, exprTyVars );
[01aeade]	1302	addInferredParams( appExpr, function, arg, exprTyVars );
[51b73452]	1303
[01aeade]	1304	arg = paramBegin;
[ae63a18]	1305
[01aeade]	1306	boxParams( appExpr, function, arg, exprTyVars );
[6c3744e]	1307
[01aeade]	1308	passAdapters( appExpr, function, exprTyVars );
[6c3744e]	1309
[01aeade]	1310	return ret;
	1311	}
[6c3744e]	1312
[01aeade]	1313	Expression Pass1::mutate( UntypedExpr expr ) {
[ffad73a]	1314	if ( ! expr->get_results().empty() && isPolyType( expr->get_results().front(), scopeTyVars, env ) ) {
[01aeade]	1315	if ( NameExpr name = dynamic_cast< NameExpr >( expr->get_function() ) ) {
	1316	if ( name->get_name() == "*?" ) {
	1317	Expression *ret = expr->get_args().front();
	1318	expr->get_args().clear();
	1319	delete expr;
	1320	return ret->acceptMutator( *this );
	1321	} // if
	1322	} // if
	1323	} // if
	1324	return PolyMutator::mutate( expr );
	1325	}
[6c3744e]	1326
[01aeade]	1327	Expression Pass1::mutate( AddressExpr addrExpr ) {
	1328	assert( ! addrExpr->get_arg()->get_results().empty() );
[cf16f94]	1329
	1330	bool needs = false;
	1331	if ( UntypedExpr expr = dynamic_cast< UntypedExpr >( addrExpr->get_arg() ) ) {
[5f6c42c]	1332	if ( ! expr->get_results().empty() && isPolyType( expr->get_results().front(), scopeTyVars, env ) ) {
[cf16f94]	1333	if ( NameExpr name = dynamic_cast< NameExpr >( expr->get_function() ) ) {
	1334	if ( name->get_name() == "*?" ) {
	1335	if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr->get_args().front() ) ) {
	1336	assert( ! appExpr->get_function()->get_results().empty() );
	1337	PointerType pointer = dynamic_cast< PointerType >( appExpr->get_function()->get_results().front() );
	1338	assert( pointer );
	1339	FunctionType function = dynamic_cast< FunctionType >( pointer->get_base() );
	1340	assert( function );
	1341	needs = needsAdapter( function, scopeTyVars );
	1342	} // if
	1343	} // if
	1344	} // if
	1345	} // if
	1346	} // if
[01aeade]	1347	addrExpr->set_arg( mutateExpression( addrExpr->get_arg() ) );
[5f6c42c]	1348	if ( isPolyType( addrExpr->get_arg()->get_results().front(), scopeTyVars, env ) \|\| needs ) {
[01aeade]	1349	Expression *ret = addrExpr->get_arg();
	1350	delete ret->get_results().front();
	1351	ret->get_results().front() = addrExpr->get_results().front()->clone();
	1352	addrExpr->set_arg( 0 );
	1353	delete addrExpr;
	1354	return ret;
	1355	} else {
	1356	return addrExpr;
	1357	} // if
	1358	}
[6c3744e]	1359
[b10c9959]	1360	/// Wraps a function declaration in a new pointer-to-function variable expression
	1361	VariableExpr wrapFunctionDecl( DeclarationWithType functionDecl ) {
	1362	// line below cloned from FixFunction.cc
	1363	ObjectDecl *functionObj = new ObjectDecl( functionDecl->get_name(), functionDecl->get_storageClass(), functionDecl->get_linkage(), 0,
	1364	new PointerType( Type::Qualifiers(), functionDecl->get_type()->clone() ), 0 );
	1365	functionObj->set_mangleName( functionDecl->get_mangleName() );
	1366	return new VariableExpr( functionObj );
	1367	}
	1368
[cf16f94]	1369	Statement * Pass1::mutate( ReturnStmt *returnStmt ) {
	1370	if ( retval && returnStmt->get_expr() ) {
	1371	assert( ! returnStmt->get_expr()->get_results().empty() );
	1372	// *** Code Removal *** After introducing a temporary variable for all return expressions, the following code appears superfluous.
	1373	// if ( returnStmt->get_expr()->get_results().front()->get_isLvalue() ) {
[ae63a18]	1374	// by this point, a cast expr on a polymorphic return value is redundant
[cf16f94]	1375	while ( CastExpr castExpr = dynamic_cast< CastExpr >( returnStmt->get_expr() ) ) {
	1376	returnStmt->set_expr( castExpr->get_arg() );
	1377	returnStmt->get_expr()->set_env( castExpr->get_env() );
	1378	castExpr->set_env( 0 );
	1379	castExpr->set_arg( 0 );
	1380	delete castExpr;
[5f6c42c]	1381	} //while
[1194734]	1382
	1383	// find assignment operator for (polymorphic) return type
[b10c9959]	1384	ApplicationExpr *assignExpr = 0;
[1194734]	1385	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( retval->get_type() ) ) {
[b10c9959]	1386	// find assignment operator for type variable
[1194734]	1387	std::map< std::string, DeclarationWithType *>::const_iterator assignIter = assignOps.find( typeInst->get_name() );
	1388	if ( assignIter == assignOps.end() ) {
	1389	throw SemanticError( "Attempt to return dtype or ftype object in ", returnStmt->get_expr() );
	1390	} // if
[b10c9959]	1391	assignExpr = new ApplicationExpr( new VariableExpr( assignIter->second ) );
[1194734]	1392	} else if ( ReferenceToType refType = dynamic_cast< ReferenceToType >( retval->get_type() ) ) {
[b10c9959]	1393	// find assignment operator for generic type
[dc12481]	1394	DeclarationWithType *functionDecl = scopedAssignOps.find( refType );
	1395	if ( ! functionDecl ) {
[1194734]	1396	throw SemanticError( "Attempt to return dtype or ftype generic object in ", returnStmt->get_expr() );
	1397	}
[b10c9959]	1398
	1399	// wrap it up in an application expression
	1400	assignExpr = new ApplicationExpr( wrapFunctionDecl( functionDecl ) );
	1401	assignExpr->set_env( env->clone() );
	1402
	1403	// find each of its needed secondary assignment operators
	1404	std::list< Expression* > &tyParams = refType->get_parameters();
	1405	std::list< TypeDecl* > &forallParams = functionDecl->get_type()->get_forall();
	1406	std::list< Expression* >::const_iterator tyIt = tyParams.begin();
	1407	std::list< TypeDecl* >::const_iterator forallIt = forallParams.begin();
	1408	for ( ; tyIt != tyParams.end() && forallIt != forallParams.end(); ++tyIt, ++forallIt ) {
[ae7014e]	1409	// Add appropriate mapping to assignment expression environment
[b10c9959]	1410	TypeExpr formalTypeExpr = dynamic_cast< TypeExpr >( *tyIt );
	1411	assert( formalTypeExpr && "type parameters must be type expressions" );
	1412	Type *formalType = formalTypeExpr->get_type();
[ae7014e]	1413	assignExpr->get_env()->add( (*forallIt)->get_name(), formalType );
	1414
	1415	// skip types with no assign op (ftype/dtype)
	1416	if ( (*forallIt)->get_kind() != TypeDecl::Any ) continue;
	1417
	1418	// find assignment operator for formal type
[b10c9959]	1419	DeclarationWithType *assertAssign = 0;
	1420	if ( TypeInstType formalTypeInstType = dynamic_cast< TypeInstType >( formalType ) ) {
	1421	std::map< std::string, DeclarationWithType *>::const_iterator assertAssignIt = assignOps.find( formalTypeInstType->get_name() );
	1422	if ( assertAssignIt == assignOps.end() ) {
	1423	throw SemanticError( "No assignment operation found for ", formalTypeInstType );
	1424	}
	1425	assertAssign = assertAssignIt->second;
[dc12481]	1426	} else {
	1427	assertAssign = scopedAssignOps.find( formalType );
	1428	if ( ! assertAssign ) {
	1429	throw SemanticError( "No assignment operation found for ", formalType );
[b10c9959]	1430	}
[dc12481]	1431	}
[b10c9959]	1432
[ae7014e]	1433	// add inferred parameter for field assignment operator to assignment expression
	1434	std::list< DeclarationWithType* > &asserts = (*forallIt)->get_assertions();
	1435	assert( ! asserts.empty() && "Type param needs assignment operator assertion" );
	1436	DeclarationWithType *actualDecl = asserts.front();
[b10c9959]	1437	assignExpr->get_inferParams()[ actualDecl->get_uniqueId() ]
	1438	= ParamEntry( assertAssign->get_uniqueId(), assertAssign->get_type()->clone(), actualDecl->get_type()->clone(), wrapFunctionDecl( assertAssign ) );
	1439	}
[1194734]	1440	}
[b10c9959]	1441	assert( assignExpr );
[1194734]	1442
	1443	// replace return statement with appropriate assignment to out parameter
[cf16f94]	1444	Expression *retParm = new NameExpr( retval->get_name() );
	1445	retParm->get_results().push_back( new PointerType( Type::Qualifiers(), retval->get_type()->clone() ) );
	1446	assignExpr->get_args().push_back( retParm );
	1447	assignExpr->get_args().push_back( returnStmt->get_expr() );
	1448	stmtsToAdd.push_back( new ExprStmt( noLabels, mutateExpression( assignExpr ) ) );
	1449	// } else {
	1450	// useRetval = true;
	1451	// stmtsToAdd.push_back( new ExprStmt( noLabels, mutateExpression( returnStmt->get_expr() ) ) );
	1452	// useRetval = false;
	1453	// } // if
	1454	returnStmt->set_expr( 0 );
[01aeade]	1455	} else {
[cf16f94]	1456	returnStmt->set_expr( mutateExpression( returnStmt->get_expr() ) );
[01aeade]	1457	} // if
[cf16f94]	1458	return returnStmt;
[01aeade]	1459	}
[6c3744e]	1460
[01aeade]	1461	Type * Pass1::mutate( PointerType *pointerType ) {
	1462	TyVarMap oldtyVars = scopeTyVars;
	1463	makeTyVarMap( pointerType, scopeTyVars );
[ae63a18]	1464
[01aeade]	1465	Type *ret = Mutator::mutate( pointerType );
[ae63a18]	1466
[01aeade]	1467	scopeTyVars = oldtyVars;
	1468	return ret;
	1469	}
[6c3744e]	1470
[01aeade]	1471	Type * Pass1::mutate( FunctionType *functionType ) {
	1472	TyVarMap oldtyVars = scopeTyVars;
	1473	makeTyVarMap( functionType, scopeTyVars );
[ae63a18]	1474
[01aeade]	1475	Type *ret = Mutator::mutate( functionType );
[ae63a18]	1476
[01aeade]	1477	scopeTyVars = oldtyVars;
	1478	return ret;
	1479	}
[51b73452]	1480
[01aeade]	1481	void Pass1::doBeginScope() {
[6635c74]	1482	adapters.beginScope();
[1194734]	1483	scopedAssignOps.beginScope();
[01aeade]	1484	}
[b1a6d6b]	1485
[01aeade]	1486	void Pass1::doEndScope() {
[6635c74]	1487	adapters.endScope();
[1194734]	1488	scopedAssignOps.endScope();
[01aeade]	1489	}
[51b73452]	1490
	1491	////////////////////////////////////////// Pass2 ////////////////////////////////////////////////////
	1492
[01aeade]	1493	void Pass2::addAdapters( FunctionType *functionType ) {
	1494	std::list< DeclarationWithType *> &paramList = functionType->get_parameters();
	1495	std::list< FunctionType *> functions;
	1496	for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) {
	1497	Type orig = (arg)->get_type();
	1498	findAndReplaceFunction( orig, functions, scopeTyVars, needsAdapter );
	1499	(*arg)->set_type( orig );
	1500	}
	1501	std::set< std::string > adaptersDone;
	1502	for ( std::list< FunctionType *>::iterator funType = functions.begin(); funType != functions.end(); ++funType ) {
[bdf1954]	1503	std::string mangleName = mangleAdapterName( *funType, scopeTyVars );
[01aeade]	1504	if ( adaptersDone.find( mangleName ) == adaptersDone.end() ) {
	1505	std::string adapterName = makeAdapterName( mangleName );
[68cd1ce]	1506	paramList.push_front( new ObjectDecl( adapterName, DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new PointerType( Type::Qualifiers(), makeAdapterType( *funType, scopeTyVars ) ), 0 ) );
[01aeade]	1507	adaptersDone.insert( adaptersDone.begin(), mangleName );
	1508	}
	1509	}
[5f6c42c]	1510	// deleteAll( functions );
[01aeade]	1511	}
[6c3744e]	1512
[01aeade]	1513	template< typename DeclClass >
	1514	DeclClass * Pass2::handleDecl( DeclClass decl, Type type ) {
	1515	DeclClass ret = static_cast< DeclClass >( Mutator::mutate( decl ) );
[6c3744e]	1516
[01aeade]	1517	return ret;
	1518	}
[6c3744e]	1519
[01aeade]	1520	DeclarationWithType * Pass2::mutate( FunctionDecl *functionDecl ) {
	1521	return handleDecl( functionDecl, functionDecl->get_functionType() );
	1522	}
[6c3744e]	1523
[01aeade]	1524	ObjectDecl * Pass2::mutate( ObjectDecl *objectDecl ) {
	1525	return handleDecl( objectDecl, objectDecl->get_type() );
	1526	}
[6c3744e]	1527
[01aeade]	1528	TypeDecl * Pass2::mutate( TypeDecl *typeDecl ) {
	1529	scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind();
	1530	if ( typeDecl->get_base() ) {
	1531	return handleDecl( typeDecl, typeDecl->get_base() );
	1532	} else {
	1533	return Mutator::mutate( typeDecl );
	1534	}
	1535	}
[6c3744e]	1536
[01aeade]	1537	TypedefDecl * Pass2::mutate( TypedefDecl *typedefDecl ) {
	1538	return handleDecl( typedefDecl, typedefDecl->get_base() );
	1539	}
[6c3744e]	1540
[01aeade]	1541	Type * Pass2::mutate( PointerType *pointerType ) {
	1542	TyVarMap oldtyVars = scopeTyVars;
	1543	makeTyVarMap( pointerType, scopeTyVars );
[ae63a18]	1544
[01aeade]	1545	Type *ret = Mutator::mutate( pointerType );
[ae63a18]	1546
[01aeade]	1547	scopeTyVars = oldtyVars;
	1548	return ret;
	1549	}
[6c3744e]	1550
[01aeade]	1551	Type Pass2::mutate( FunctionType funcType ) {
	1552	TyVarMap oldtyVars = scopeTyVars;
	1553	makeTyVarMap( funcType, scopeTyVars );
[7754cde]	1554
	1555	// move polymorphic return type to parameter list
[aadc9a4]	1556	if ( isPolyRet( funcType ) ) {
[01aeade]	1557	DeclarationWithType *ret = funcType->get_returnVals().front();
	1558	ret->set_type( new PointerType( Type::Qualifiers(), ret->get_type() ) );
	1559	funcType->get_parameters().push_front( ret );
	1560	funcType->get_returnVals().pop_front();
	1561	}
[7754cde]	1562
	1563	// add size/align and assertions for type parameters to parameter list
[01aeade]	1564	std::list< DeclarationWithType *>::iterator last = funcType->get_parameters().begin();
	1565	std::list< DeclarationWithType *> inferredParams;
[78dd0da]	1566	ObjectDecl newObj( "", DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), 0 );
[05d47278]	1567	ObjectDecl newPtr( "", DeclarationNode::NoStorageClass, LinkageSpec::C, 0,
	1568	new PointerType( Type::Qualifiers(), new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ) ), 0 );
[01aeade]	1569	for ( std::list< TypeDecl *>::const_iterator tyParm = funcType->get_forall().begin(); tyParm != funcType->get_forall().end(); ++tyParm ) {
[db0b3ce]	1570	ObjectDecl sizeParm, alignParm;
	1571	// add all size and alignment parameters to parameter list
[01aeade]	1572	if ( (*tyParm)->get_kind() == TypeDecl::Any ) {
[78dd0da]	1573	TypeInstType parmType( Type::Qualifiers(), (tyParm)->get_name(), tyParm );
[ae63a18]	1574
[78dd0da]	1575	sizeParm = newObj.clone();
	1576	sizeParm->set_name( sizeofName( &parmType ) );
[db0b3ce]	1577	last = funcType->get_parameters().insert( last, sizeParm );
	1578	++last;
[78dd0da]	1579
	1580	alignParm = newObj.clone();
	1581	alignParm->set_name( alignofName( &parmType ) );
[db0b3ce]	1582	last = funcType->get_parameters().insert( last, alignParm );
[01aeade]	1583	++last;
	1584	}
[e56cfdb0]	1585	// move all assertions into parameter list
[01aeade]	1586	for ( std::list< DeclarationWithType >::iterator assert = (tyParm)->get_assertions().begin(); assert != (*tyParm)->get_assertions().end(); ++assert ) {
[f8b961b]	1587	// assert = (assert)->acceptMutator( *this );
[01aeade]	1588	inferredParams.push_back( *assert );
	1589	}
	1590	(*tyParm)->get_assertions().clear();
	1591	}
[7754cde]	1592
[5c52b06]	1593	// add size/align for generic parameter types to parameter list
[b18b0b5]	1594	std::set< std::string > seenTypes; // sizeofName for generic types we've seen
[7754cde]	1595	for ( std::list< DeclarationWithType* >::const_iterator fnParm = last; fnParm != funcType->get_parameters().end(); ++fnParm ) {
[32805db]	1596	Type polyBase = hasPolyBase( (fnParm)->get_type(), scopeTyVars );
	1597	if ( polyBase && ! dynamic_cast< TypeInstType* >( polyBase ) ) {
	1598	std::string sizeName = sizeofName( polyBase );
[7754cde]	1599	if ( seenTypes.count( sizeName ) ) continue;
[ae63a18]	1600
[05d47278]	1601	ObjectDecl sizeParm, alignParm, *offsetParm;
[7754cde]	1602	sizeParm = newObj.clone();
	1603	sizeParm->set_name( sizeName );
	1604	last = funcType->get_parameters().insert( last, sizeParm );
	1605	++last;
	1606
	1607	alignParm = newObj.clone();
[32805db]	1608	alignParm->set_name( alignofName( polyBase ) );
[7754cde]	1609	last = funcType->get_parameters().insert( last, alignParm );
	1610	++last;
	1611
[89173242]	1612	if ( StructInstType polyBaseStruct = dynamic_cast< StructInstType >( polyBase ) ) {
	1613	// NOTE zero-length arrays are illegal in C, so empty structs have no offset array
	1614	if ( ! polyBaseStruct->get_baseStruct()->get_members().empty() ) {
	1615	offsetParm = newPtr.clone();
	1616	offsetParm->set_name( offsetofName( polyBase ) );
	1617	last = funcType->get_parameters().insert( last, offsetParm );
	1618	++last;
	1619	}
[05d47278]	1620	}
	1621
[7754cde]	1622	seenTypes.insert( sizeName );
	1623	}
	1624	}
	1625
	1626	// splice assertion parameters into parameter list
[01aeade]	1627	funcType->get_parameters().splice( last, inferredParams );
	1628	addAdapters( funcType );
	1629	mutateAll( funcType->get_returnVals(), *this );
	1630	mutateAll( funcType->get_parameters(), *this );
[ae63a18]	1631
[01aeade]	1632	scopeTyVars = oldtyVars;
	1633	return funcType;
	1634	}
[51b73452]	1635
[4e284ea6]	1636	//////////////////////////////////////// GenericInstantiator //////////////////////////////////////////////////
	1637
	1638	/// Makes substitutions of params into baseParams; returns true if all parameters substituted for a concrete type
	1639	bool makeSubstitutions( const std::list< TypeDecl* >& baseParams, const std::list< Expression* >& params, std::list< TypeExpr* >& out ) {
	1640	bool allConcrete = true; // will finish the substitution list even if they're not all concrete
	1641
	1642	// substitute concrete types for given parameters, and incomplete types for placeholders
	1643	std::list< TypeDecl* >::const_iterator baseParam = baseParams.begin();
	1644	std::list< Expression* >::const_iterator param = params.begin();
	1645	for ( ; baseParam != baseParams.end() && param != params.end(); ++baseParam, ++param ) {
	1646	// switch ( (*baseParam)->get_kind() ) {
	1647	// case TypeDecl::Any: { // any type is a valid substitution here; complete types can be used to instantiate generics
	1648	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
	1649	assert(paramType && "Aggregate parameters should be type expressions");
	1650	out.push_back( paramType->clone() );
	1651	// check that the substituted type isn't a type variable itself
	1652	if ( dynamic_cast< TypeInstType* >( paramType->get_type() ) ) {
	1653	allConcrete = false;
	1654	}
	1655	// break;
	1656	// }
	1657	// case TypeDecl::Dtype: // dtype can be consistently replaced with void [only pointers, which become void*]
	1658	// out.push_back( new TypeExpr( new VoidType( Type::Qualifiers() ) ) );
	1659	// break;
	1660	// case TypeDecl::Ftype: // pointer-to-ftype can be consistently replaced with void (*)(void) [similar to dtype]
	1661	// out.push_back( new TypeExpr( new FunctionType( Type::Qualifiers(), false ) ) );
	1662	// break;
	1663	// }
	1664	}
	1665
	1666	// if any parameters left over, not done
	1667	if ( baseParam != baseParams.end() ) return false;
	1668	// // if not enough parameters given, substitute remaining incomplete types for placeholders
	1669	// for ( ; baseParam != baseParams.end(); ++baseParam ) {
	1670	// switch ( (*baseParam)->get_kind() ) {
	1671	// case TypeDecl::Any: // no more substitutions here, fail early
	1672	// return false;
	1673	// case TypeDecl::Dtype: // dtype can be consistently replaced with void [only pointers, which become void*]
	1674	// out.push_back( new TypeExpr( new VoidType( Type::Qualifiers() ) ) );
	1675	// break;
	1676	// case TypeDecl::Ftype: // pointer-to-ftype can be consistently replaced with void (*)(void) [similar to dtype]
	1677	// out.push_back( new TypeExpr( new FunctionType( Type::Qualifiers(), false ) ) );
	1678	// break;
	1679	// }
	1680	// }
	1681
	1682	return allConcrete;
	1683	}
	1684
	1685	/// Substitutes types of members of in according to baseParams => typeSubs, appending the result to out
	1686	void substituteMembers( const std::list< Declaration* >& in, const std::list< TypeDecl* >& baseParams, const std::list< TypeExpr* >& typeSubs,
	1687	std::list< Declaration* >& out ) {
	1688	// substitute types into new members
	1689	TypeSubstitution subs( baseParams.begin(), baseParams.end(), typeSubs.begin() );
	1690	for ( std::list< Declaration* >::const_iterator member = in.begin(); member != in.end(); ++member ) {
	1691	Declaration newMember = (member)->clone();
	1692	subs.apply(newMember);
	1693	out.push_back( newMember );
	1694	}
	1695	}
	1696
	1697	Type* GenericInstantiator::mutate( StructInstType *inst ) {
	1698	// mutate subtypes
	1699	Type *mutated = Mutator::mutate( inst );
	1700	inst = dynamic_cast< StructInstType* >( mutated );
	1701	if ( ! inst ) return mutated;
	1702
	1703	// exit early if no need for further mutation
	1704	if ( inst->get_parameters().empty() ) return inst;
	1705	assert( inst->get_baseParameters() && "Base struct has parameters" );
	1706
	1707	// check if type can be concretely instantiated; put substitutions into typeSubs
	1708	std::list< TypeExpr* > typeSubs;
	1709	if ( ! makeSubstitutions( *inst->get_baseParameters(), inst->get_parameters(), typeSubs ) ) {
	1710	deleteAll( typeSubs );
	1711	return inst;
	1712	}
	1713
	1714	// make concrete instantiation of generic type
	1715	StructDecl *concDecl = lookup( inst, typeSubs );
	1716	if ( ! concDecl ) {
	1717	// set concDecl to new type, insert type declaration into statements to add
	1718	concDecl = new StructDecl( typeNamer.newName( inst->get_name() ) );
	1719	substituteMembers( inst->get_baseStruct()->get_members(), *inst->get_baseParameters(), typeSubs, concDecl->get_members() );
	1720	DeclMutator::addDeclaration( concDecl );
	1721	insert( inst, typeSubs, concDecl );
	1722	}
	1723	StructInstType *newInst = new StructInstType( inst->get_qualifiers(), concDecl->get_name() );
	1724	newInst->set_baseStruct( concDecl );
	1725
	1726	deleteAll( typeSubs );
	1727	delete inst;
	1728	return newInst;
	1729	}
	1730
	1731	Type* GenericInstantiator::mutate( UnionInstType *inst ) {
	1732	// mutate subtypes
	1733	Type *mutated = Mutator::mutate( inst );
	1734	inst = dynamic_cast< UnionInstType* >( mutated );
	1735	if ( ! inst ) return mutated;
	1736
	1737	// exit early if no need for further mutation
	1738	if ( inst->get_parameters().empty() ) return inst;
	1739	assert( inst->get_baseParameters() && "Base union has parameters" );
	1740
	1741	// check if type can be concretely instantiated; put substitutions into typeSubs
	1742	std::list< TypeExpr* > typeSubs;
	1743	if ( ! makeSubstitutions( *inst->get_baseParameters(), inst->get_parameters(), typeSubs ) ) {
	1744	deleteAll( typeSubs );
	1745	return inst;
	1746	}
	1747
	1748	// make concrete instantiation of generic type
	1749	UnionDecl *concDecl = lookup( inst, typeSubs );
	1750	if ( ! concDecl ) {
	1751	// set concDecl to new type, insert type declaration into statements to add
	1752	concDecl = new UnionDecl( typeNamer.newName( inst->get_name() ) );
	1753	substituteMembers( inst->get_baseUnion()->get_members(), *inst->get_baseParameters(), typeSubs, concDecl->get_members() );
	1754	DeclMutator::addDeclaration( concDecl );
	1755	insert( inst, typeSubs, concDecl );
	1756	}
	1757	UnionInstType *newInst = new UnionInstType( inst->get_qualifiers(), concDecl->get_name() );
	1758	newInst->set_baseUnion( concDecl );
	1759
	1760	deleteAll( typeSubs );
	1761	delete inst;
	1762	return newInst;
	1763	}
	1764
	1765	// /// Gets the base struct or union declaration for a member expression; NULL if not applicable
	1766	// AggregateDecl* getMemberBaseDecl( MemberExpr *memberExpr ) {
	1767	// // get variable for member aggregate
	1768	// VariableExpr varExpr = dynamic_cast< VariableExpr >( memberExpr->get_aggregate() );
	1769	// if ( ! varExpr ) return NULL;
	1770	//
	1771	// // get object for variable
	1772	// ObjectDecl objectDecl = dynamic_cast< ObjectDecl >( varExpr->get_var() );
	1773	// if ( ! objectDecl ) return NULL;
	1774	//
	1775	// // get base declaration from object type
	1776	// Type *objectType = objectDecl->get_type();
	1777	// StructInstType structType = dynamic_cast< StructInstType >( objectType );
	1778	// if ( structType ) return structType->get_baseStruct();
	1779	// UnionInstType unionType = dynamic_cast< UnionInstType >( objectType );
	1780	// if ( unionType ) return unionType->get_baseUnion();
	1781	//
	1782	// return NULL;
	1783	// }
	1784	//
	1785	// /// Finds the declaration with the given name, returning decls.end() if none such
	1786	// std::list< Declaration* >::const_iterator findDeclNamed( const std::list< Declaration* > &decls, const std::string &name ) {
	1787	// for( std::list< Declaration* >::const_iterator decl = decls.begin(); decl != decls.end(); ++decl ) {
	1788	// if ( (*decl)->get_name() == name ) return decl;
	1789	// }
	1790	// return decls.end();
	1791	// }
	1792	//
	1793	// Expression* Instantiate::mutate( MemberExpr *memberExpr ) {
	1794	// // mutate, exiting early if no longer MemberExpr
	1795	// Expression *expr = Mutator::mutate( memberExpr );
	1796	// memberExpr = dynamic_cast< MemberExpr* >( expr );
	1797	// if ( ! memberExpr ) return expr;
	1798	//
	1799	// // get declaration of member and base declaration of member, exiting early if not found
	1800	// AggregateDecl *memberBase = getMemberBaseDecl( memberExpr );
	1801	// if ( ! memberBase ) return memberExpr;
	1802	// DeclarationWithType *memberDecl = memberExpr->get_member();
	1803	// std::list< Declaration* >::const_iterator baseIt = findDeclNamed( memberBase->get_members(), memberDecl->get_name() );
	1804	// if ( baseIt == memberBase->get_members().end() ) return memberExpr;
	1805	// DeclarationWithType baseDecl = dynamic_cast< DeclarationWithType >( *baseIt );
	1806	// if ( ! baseDecl ) return memberExpr;
	1807	//
	1808	// // check if stated type of the member is not the type of the member's declaration; if so, need a cast
	1809	// // this SHOULD be safe, I don't think anything but the void-replacements I put in for dtypes would make it past the typechecker
	1810	// SymTab::Indexer dummy;
	1811	// if ( ResolvExpr::typesCompatible( memberDecl->get_type(), baseDecl->get_type(), dummy ) ) return memberExpr;
	1812	// else return new CastExpr( memberExpr, memberDecl->get_type() );
	1813	// }
	1814
	1815	void GenericInstantiator::doBeginScope() {
	1816	DeclMutator::doBeginScope();
	1817	instantiations.beginScope();
	1818	}
	1819
	1820	void GenericInstantiator::doEndScope() {
	1821	DeclMutator::doEndScope();
	1822	instantiations.endScope();
	1823	}
	1824
[05d47278]	1825	////////////////////////////////////////// MemberExprFixer ////////////////////////////////////////////////////
[51b73452]	1826
[01aeade]	1827	template< typename DeclClass >
[8a34677]	1828	DeclClass * PolyGenericCalculator::handleDecl( DeclClass decl, Type type ) {
[01aeade]	1829	TyVarMap oldtyVars = scopeTyVars;
	1830	makeTyVarMap( type, scopeTyVars );
[ae63a18]	1831
[01aeade]	1832	DeclClass ret = static_cast< DeclClass >( Mutator::mutate( decl ) );
[6c3744e]	1833
[01aeade]	1834	scopeTyVars = oldtyVars;
	1835	return ret;
	1836	}
[6c3744e]	1837
[8a34677]	1838	ObjectDecl * PolyGenericCalculator::mutate( ObjectDecl *objectDecl ) {
[01aeade]	1839	return handleDecl( objectDecl, objectDecl->get_type() );
	1840	}
[6c3744e]	1841
[8a34677]	1842	DeclarationWithType * PolyGenericCalculator::mutate( FunctionDecl *functionDecl ) {
[01aeade]	1843	return handleDecl( functionDecl, functionDecl->get_functionType() );
	1844	}
[6c3744e]	1845
[8a34677]	1846	TypedefDecl * PolyGenericCalculator::mutate( TypedefDecl *typedefDecl ) {
[01aeade]	1847	return handleDecl( typedefDecl, typedefDecl->get_base() );
	1848	}
[6c3744e]	1849
[8a34677]	1850	TypeDecl * PolyGenericCalculator::mutate( TypeDecl *typeDecl ) {
[01aeade]	1851	scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind();
	1852	return Mutator::mutate( typeDecl );
	1853	}
[51b73452]	1854
[8a34677]	1855	Type * PolyGenericCalculator::mutate( PointerType *pointerType ) {
[01aeade]	1856	TyVarMap oldtyVars = scopeTyVars;
	1857	makeTyVarMap( pointerType, scopeTyVars );
[ae63a18]	1858
[01aeade]	1859	Type *ret = Mutator::mutate( pointerType );
[ae63a18]	1860
[01aeade]	1861	scopeTyVars = oldtyVars;
	1862	return ret;
	1863	}
[6c3744e]	1864
[8a34677]	1865	Type * PolyGenericCalculator::mutate( FunctionType *funcType ) {
[01aeade]	1866	TyVarMap oldtyVars = scopeTyVars;
[8a34677]	1867	makeTyVarMap( funcType, scopeTyVars );
[ae63a18]	1868
[8a34677]	1869	// make sure that any type information passed into the function is accounted for
	1870	for ( std::list< DeclarationWithType* >::const_iterator fnParm = funcType->get_parameters().begin(); fnParm != funcType->get_parameters().end(); ++fnParm ) {
	1871	// condition here duplicates that in Pass2::mutate( FunctionType* )
	1872	Type polyBase = hasPolyBase( (fnParm)->get_type(), scopeTyVars );
	1873	if ( polyBase && ! dynamic_cast< TypeInstType* >( polyBase ) ) {
	1874	knownLayouts.insert( sizeofName( polyBase ) );
	1875	}
	1876	}
	1877
	1878	Type *ret = Mutator::mutate( funcType );
[ae63a18]	1879
[01aeade]	1880	scopeTyVars = oldtyVars;
	1881	return ret;
[6c3744e]	1882	}
[51b73452]	1883
[8a34677]	1884	Statement PolyGenericCalculator::mutate( DeclStmt declStmt ) {
[01aeade]	1885	if ( ObjectDecl objectDecl = dynamic_cast< ObjectDecl >( declStmt->get_decl() ) ) {
[8a34677]	1886	if ( findGeneric( objectDecl->get_type() ) ) {
[e01559c]	1887	// change initialization of a polymorphic value object
	1888	// to allocate storage with alloca
[ffad73a]	1889	Type *declType = objectDecl->get_type();
[01aeade]	1890	UntypedExpr *alloc = new UntypedExpr( new NameExpr( "__builtin_alloca" ) );
[ffad73a]	1891	alloc->get_args().push_back( new NameExpr( sizeofName( declType ) ) );
[e01559c]	1892
	1893	delete objectDecl->get_init();
	1894
	1895	std::list<Expression*> designators;
	1896	objectDecl->set_init( new SingleInit( alloc, designators ) );
[01aeade]	1897	}
	1898	}
	1899	return Mutator::mutate( declStmt );
	1900	}
[05d47278]	1901
[2a4b088]	1902	/// Finds the member in the base list that matches the given declaration; returns its index, or -1 if not present
	1903	long findMember( DeclarationWithType memberDecl, std::list< Declaration > &baseDecls ) {
	1904	long i = 0;
	1905	for(std::list< Declaration* >::const_iterator decl = baseDecls.begin(); decl != baseDecls.end(); ++decl, ++i ) {
	1906	if ( memberDecl->get_name() != (*decl)->get_name() ) continue;
	1907
	1908	if ( DeclarationWithType declWithType = dynamic_cast< DeclarationWithType >( *decl ) ) {
[bed4d37c]	1909	if ( memberDecl->get_mangleName().empty() \|\| declWithType->get_mangleName().empty()
	1910	\|\| memberDecl->get_mangleName() == declWithType->get_mangleName() ) return i;
[2a4b088]	1911	else continue;
	1912	} else return i;
	1913	}
	1914	return -1;
	1915	}
	1916
	1917	/// Returns an index expression into the offset array for a type
	1918	Expression makeOffsetIndex( Type objectType, long i ) {
	1919	std::stringstream offset_namer;
	1920	offset_namer << i;
	1921	ConstantExpr *fieldIndex = new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), offset_namer.str() ) );
	1922	UntypedExpr *fieldOffset = new UntypedExpr( new NameExpr( "?[?]" ) );
	1923	fieldOffset->get_args().push_back( new NameExpr( offsetofName( objectType ) ) );
	1924	fieldOffset->get_args().push_back( fieldIndex );
	1925	return fieldOffset;
	1926	}
	1927
	1928	/// Returns an expression dereferenced n times
	1929	Expression makeDerefdVar( Expression derefdVar, long n ) {
	1930	for ( int i = 1; i < n; ++i ) {
	1931	UntypedExpr derefExpr = new UntypedExpr( new NameExpr( "?" ) );
	1932	derefExpr->get_args().push_back( derefdVar );
	1933	derefdVar = derefExpr;
	1934	}
	1935	return derefdVar;
	1936	}
	1937
[8a34677]	1938	Expression PolyGenericCalculator::mutate( MemberExpr memberExpr ) {
[05d47278]	1939	// mutate, exiting early if no longer MemberExpr
	1940	Expression *expr = Mutator::mutate( memberExpr );
	1941	memberExpr = dynamic_cast< MemberExpr* >( expr );
	1942	if ( ! memberExpr ) return expr;
	1943
	1944	// get declaration for base struct, exiting early if not found
[8488c715]	1945	int varDepth;
	1946	VariableExpr *varExpr = getBaseVar( memberExpr->get_aggregate(), &varDepth );
[05d47278]	1947	if ( ! varExpr ) return memberExpr;
	1948	ObjectDecl objectDecl = dynamic_cast< ObjectDecl >( varExpr->get_var() );
	1949	if ( ! objectDecl ) return memberExpr;
	1950
	1951	// only mutate member expressions for polymorphic types
[8488c715]	1952	int tyDepth;
	1953	Type *objectType = hasPolyBase( objectDecl->get_type(), scopeTyVars, &tyDepth );
[05d47278]	1954	if ( ! objectType ) return memberExpr;
[8a34677]	1955	findGeneric( objectType ); // ensure layout for this type is available
[05d47278]	1956
[4318107]	1957	Expression *newMemberExpr = 0;
[05d47278]	1958	if ( StructInstType structType = dynamic_cast< StructInstType >( objectType ) ) {
[2a4b088]	1959	// look up offset index
	1960	long i = findMember( memberExpr->get_member(), structType->get_baseStruct()->get_members() );
	1961	if ( i == -1 ) return memberExpr;
[05d47278]	1962
[2a4b088]	1963	// replace member expression with pointer to base plus offset
	1964	UntypedExpr *fieldLoc = new UntypedExpr( new NameExpr( "?+?" ) );
	1965	fieldLoc->get_args().push_back( makeDerefdVar( varExpr->clone(), varDepth ) );
	1966	fieldLoc->get_args().push_back( makeOffsetIndex( objectType, i ) );
[4318107]	1967	newMemberExpr = fieldLoc;
[98735ef]	1968	} else if ( dynamic_cast< UnionInstType* >( objectType ) ) {
[2a4b088]	1969	// union members are all at offset zero, so build appropriately-dereferenced variable
[4318107]	1970	newMemberExpr = makeDerefdVar( varExpr->clone(), varDepth );
[2a4b088]	1971	} else return memberExpr;
[4318107]	1972	assert( newMemberExpr );
	1973
[4067aa8]	1974	Type *memberType = memberExpr->get_member()->get_type();
	1975	if ( ! isPolyType( memberType, scopeTyVars ) ) {
	1976	// 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
	1977	CastExpr *ptrCastExpr = new CastExpr( newMemberExpr, new PointerType( Type::Qualifiers(), memberType->clone() ) );
[4318107]	1978	UntypedExpr derefExpr = new UntypedExpr( new NameExpr( "?" ) );
	1979	derefExpr->get_args().push_back( ptrCastExpr );
	1980	newMemberExpr = derefExpr;
	1981	}
	1982
	1983	delete memberExpr;
	1984	return newMemberExpr;
[2a4b088]	1985	}
[05d47278]	1986
[8a34677]	1987	ObjectDecl PolyGenericCalculator::makeVar( const std::string &name, Type type, Initializer *init ) {
	1988	ObjectDecl *newObj = new ObjectDecl( name, DeclarationNode::NoStorageClass, LinkageSpec::C, 0, type, init );
	1989	stmtsToAdd.push_back( new DeclStmt( noLabels, newObj ) );
	1990	return newObj;
	1991	}
	1992
	1993	void PolyGenericCalculator::addOtypeParamsToLayoutCall( UntypedExpr layoutCall, const std::list< Type > &otypeParams ) {
	1994	for ( std::list< Type* >::const_iterator param = otypeParams.begin(); param != otypeParams.end(); ++param ) {
	1995	if ( findGeneric( *param ) ) {
	1996	// push size/align vars for a generic parameter back
	1997	layoutCall->get_args().push_back( new NameExpr( sizeofName( *param ) ) );
	1998	layoutCall->get_args().push_back( new NameExpr( alignofName( *param ) ) );
	1999	} else {
	2000	layoutCall->get_args().push_back( new SizeofExpr( (*param)->clone() ) );
	2001	layoutCall->get_args().push_back( new AlignofExpr( (*param)->clone() ) );
	2002	}
	2003	}
	2004	}
	2005
	2006	/// returns true if any of the otype parameters have a dynamic layout and puts all otype parameters in the output list
	2007	bool findGenericParams( std::list< TypeDecl* > &baseParams, std::list< Expression* > &typeParams, std::list< Type* > &out ) {
	2008	bool hasDynamicLayout = false;
	2009
	2010	std::list< TypeDecl* >::const_iterator baseParam = baseParams.begin();
	2011	std::list< Expression* >::const_iterator typeParam = typeParams.begin();
	2012	for ( ; baseParam != baseParams.end() && typeParam != typeParams.end(); ++baseParam, ++typeParam ) {
	2013	// skip non-otype parameters
	2014	if ( (*baseParam)->get_kind() != TypeDecl::Any ) continue;
	2015	TypeExpr typeExpr = dynamic_cast< TypeExpr >( *typeParam );
	2016	assert( typeExpr && "all otype parameters should be type expressions" );
	2017
	2018	Type *type = typeExpr->get_type();
	2019	out.push_back( type );
	2020	if ( isPolyType( type ) ) hasDynamicLayout = true;
	2021	}
	2022	assert( baseParam == baseParams.end() && typeParam == typeParams.end() );
	2023
	2024	return hasDynamicLayout;
	2025	}
	2026
	2027	bool PolyGenericCalculator::findGeneric( Type *ty ) {
	2028	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( ty ) ) {
	2029	// duplicate logic from isPolyType()
	2030	if ( env ) {
	2031	if ( Type *newType = env->lookup( typeInst->get_name() ) ) {
	2032	return findGeneric( newType );
	2033	} // if
	2034	} // if
	2035	if ( scopeTyVars.find( typeInst->get_name() ) != scopeTyVars.end() ) {
	2036	// NOTE assumes here that getting put in the scopeTyVars included having the layout variables set
	2037	return true;
	2038	}
	2039	return false;
	2040	} else if ( StructInstType structTy = dynamic_cast< StructInstType >( ty ) ) {
	2041	// check if this type already has a layout generated for it
	2042	std::string sizeName = sizeofName( ty );
	2043	if ( knownLayouts.find( sizeName ) != knownLayouts.end() ) return true;
	2044
	2045	// check if any of the type parameters have dynamic layout; if none do, this type is (or will be) monomorphized
	2046	std::list< Type* > otypeParams;
	2047	if ( ! findGenericParams( *structTy->get_baseParameters(), structTy->get_parameters(), otypeParams ) ) return false;
	2048
	2049	// insert local variables for layout and generate call to layout function
	2050	knownLayouts.insert( sizeName ); // done early so as not to interfere with the later addition of parameters to the layout call
	2051	Type *layoutType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	2052
	2053	int n_members = structTy->get_baseStruct()->get_members().size();
	2054	if ( n_members == 0 ) {
	2055	// all empty structs have the same layout - size 1, align 1
	2056	makeVar( sizeName, layoutType, new SingleInit( new ConstantExpr( Constant::from( (unsigned long)1 ) ) ) );
	2057	makeVar( alignofName( ty ), layoutType->clone(), new SingleInit( new ConstantExpr( Constant::from( (unsigned long)1 ) ) ) );
	2058	// NOTE zero-length arrays are forbidden in C, so empty structs have no offsetof array
	2059	} else {
	2060	ObjectDecl *sizeVar = makeVar( sizeName, layoutType );
	2061	ObjectDecl *alignVar = makeVar( alignofName( ty ), layoutType->clone() );
	2062	ObjectDecl *offsetVar = makeVar( offsetofName( ty ), new ArrayType( Type::Qualifiers(), layoutType->clone(), new ConstantExpr( Constant::from( n_members ) ), false, false ) );
	2063
	2064	// generate call to layout function
	2065	UntypedExpr *layoutCall = new UntypedExpr( new NameExpr( "__layoutof_" + structTy->get_baseStruct()->get_name() ) );
	2066	layoutCall->get_args().push_back( new AddressExpr( new VariableExpr( sizeVar ) ) );
	2067	layoutCall->get_args().push_back( new AddressExpr( new VariableExpr( alignVar ) ) );
	2068	layoutCall->get_args().push_back( new VariableExpr( offsetVar ) );
	2069	addOtypeParamsToLayoutCall( layoutCall, otypeParams );
	2070
	2071	stmtsToAdd.push_back( new ExprStmt( noLabels, layoutCall ) );
	2072	}
	2073
	2074	return true;
	2075	} else if ( UnionInstType unionTy = dynamic_cast< UnionInstType >( ty ) ) {
	2076	// check if this type already has a layout generated for it
	2077	std::string sizeName = sizeofName( ty );
	2078	if ( knownLayouts.find( sizeName ) != knownLayouts.end() ) return true;
	2079
	2080	// check if any of the type parameters have dynamic layout; if none do, this type is (or will be) monomorphized
	2081	std::list< Type* > otypeParams;
	2082	if ( ! findGenericParams( *unionTy->get_baseParameters(), unionTy->get_parameters(), otypeParams ) ) return false;
	2083
	2084	// insert local variables for layout and generate call to layout function
	2085	knownLayouts.insert( sizeName ); // done early so as not to interfere with the later addition of parameters to the layout call
	2086	Type *layoutType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	2087
	2088	ObjectDecl *sizeVar = makeVar( sizeName, layoutType );
	2089	ObjectDecl *alignVar = makeVar( alignofName( ty ), layoutType->clone() );
	2090
	2091	// generate call to layout function
	2092	UntypedExpr *layoutCall = new UntypedExpr( new NameExpr( "__layoutof_" + unionTy->get_baseUnion()->get_name() ) );
	2093	layoutCall->get_args().push_back( new AddressExpr( new VariableExpr( sizeVar ) ) );
	2094	layoutCall->get_args().push_back( new AddressExpr( new VariableExpr( alignVar ) ) );
	2095	addOtypeParamsToLayoutCall( layoutCall, otypeParams );
	2096
	2097	stmtsToAdd.push_back( new ExprStmt( noLabels, layoutCall ) );
	2098
	2099	return true;
	2100	}
	2101
	2102	return false;
	2103	}
	2104
	2105	Expression PolyGenericCalculator::mutate( SizeofExpr sizeofExpr ) {
	2106	Type *ty = sizeofExpr->get_type();
	2107	if ( findGeneric( ty ) ) {
	2108	Expression *ret = new NameExpr( sizeofName( ty ) );
	2109	delete sizeofExpr;
	2110	return ret;
	2111	}
	2112	return sizeofExpr;
	2113	}
	2114
	2115	Expression PolyGenericCalculator::mutate( AlignofExpr alignofExpr ) {
	2116	Type *ty = alignofExpr->get_type();
	2117	if ( findGeneric( ty ) ) {
	2118	Expression *ret = new NameExpr( alignofName( ty ) );
	2119	delete alignofExpr;
	2120	return ret;
	2121	}
	2122	return alignofExpr;
	2123	}
	2124
	2125	Expression PolyGenericCalculator::mutate( OffsetofExpr offsetofExpr ) {
[2a4b088]	2126	// mutate, exiting early if no longer OffsetofExpr
	2127	Expression *expr = Mutator::mutate( offsetofExpr );
	2128	offsetofExpr = dynamic_cast< OffsetofExpr* >( expr );
	2129	if ( ! offsetofExpr ) return expr;
	2130
	2131	// only mutate expressions for polymorphic structs/unions
[8a34677]	2132	Type *ty = offsetofExpr->get_type();
	2133	if ( ! findGeneric( ty ) ) return offsetofExpr;
	2134
[2a4b088]	2135	if ( StructInstType structType = dynamic_cast< StructInstType >( ty ) ) {
	2136	// replace offsetof expression by index into offset array
	2137	long i = findMember( offsetofExpr->get_member(), structType->get_baseStruct()->get_members() );
	2138	if ( i == -1 ) return offsetofExpr;
	2139
	2140	Expression *offsetInd = makeOffsetIndex( ty, i );
	2141	delete offsetofExpr;
	2142	return offsetInd;
[5c52b06]	2143	} else if ( dynamic_cast< UnionInstType* >( ty ) ) {
[2a4b088]	2144	// all union members are at offset zero
	2145	delete offsetofExpr;
	2146	return new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), std::string("0") ) );
	2147	} else return offsetofExpr;
[05d47278]	2148	}
	2149
[8a34677]	2150	Expression PolyGenericCalculator::mutate( OffsetPackExpr offsetPackExpr ) {
	2151	StructInstType *ty = offsetPackExpr->get_type();
	2152
	2153	Expression *ret = 0;
	2154	if ( findGeneric( ty ) ) {
	2155	// pull offset back from generated type information
	2156	ret = new NameExpr( offsetofName( ty ) );
	2157	} else {
	2158	std::string offsetName = offsetofName( ty );
	2159	if ( knownOffsets.find( offsetName ) != knownOffsets.end() ) {
	2160	// use the already-generated offsets for this type
	2161	ret = new NameExpr( offsetName );
	2162	} else {
	2163	knownOffsets.insert( offsetName );
	2164
	2165	std::list< Declaration* > &baseMembers = ty->get_baseStruct()->get_members();
	2166	Type *offsetType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	2167
	2168	// build initializer list for offset array
	2169	std::list< Initializer* > inits;
	2170	for ( std::list< Declaration* >::const_iterator member = baseMembers.begin(); member != baseMembers.end(); ++member ) {
	2171	DeclarationWithType *memberDecl;
	2172	if ( DeclarationWithType origMember = dynamic_cast< DeclarationWithType >( *member ) ) {
	2173	memberDecl = origMember->clone();
	2174	} else {
	2175	memberDecl = new ObjectDecl( (*member)->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, offsetType->clone(), 0 );
	2176	}
	2177	inits.push_back( new SingleInit( new OffsetofExpr( ty->clone(), memberDecl ) ) );
	2178	}
	2179
	2180	// build the offset array and replace the pack with a reference to it
	2181	ObjectDecl *offsetArray = makeVar( offsetName, new ArrayType( Type::Qualifiers(), offsetType, new ConstantExpr( Constant::from( baseMembers.size() ) ), false, false ),
	2182	new ListInit( inits ) );
	2183	ret = new VariableExpr( offsetArray );
	2184	}
	2185	}
	2186
	2187	delete offsetPackExpr;
	2188	return ret;
	2189	}
	2190
	2191	void PolyGenericCalculator::doBeginScope() {
	2192	knownLayouts.beginScope();
	2193	knownOffsets.beginScope();
	2194	}
	2195
	2196	void PolyGenericCalculator::doEndScope() {
	2197	knownLayouts.endScope();
	2198	knownOffsets.beginScope();
	2199	}
	2200
[05d47278]	2201	////////////////////////////////////////// Pass3 ////////////////////////////////////////////////////
	2202
	2203	template< typename DeclClass >
	2204	DeclClass * Pass3::handleDecl( DeclClass decl, Type type ) {
	2205	TyVarMap oldtyVars = scopeTyVars;
	2206	makeTyVarMap( type, scopeTyVars );
	2207
	2208	DeclClass ret = static_cast< DeclClass >( Mutator::mutate( decl ) );
	2209	ScrubTyVars::scrub( decl, scopeTyVars );
	2210
	2211	scopeTyVars = oldtyVars;
	2212	return ret;
	2213	}
	2214
	2215	ObjectDecl * Pass3::mutate( ObjectDecl *objectDecl ) {
	2216	return handleDecl( objectDecl, objectDecl->get_type() );
	2217	}
	2218
	2219	DeclarationWithType * Pass3::mutate( FunctionDecl *functionDecl ) {
	2220	return handleDecl( functionDecl, functionDecl->get_functionType() );
	2221	}
	2222
	2223	TypedefDecl * Pass3::mutate( TypedefDecl *typedefDecl ) {
	2224	return handleDecl( typedefDecl, typedefDecl->get_base() );
	2225	}
	2226
	2227	TypeDecl * Pass3::mutate( TypeDecl *typeDecl ) {
	2228	// Initializer *init = 0;
	2229	// std::list< Expression *> designators;
	2230	// scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind();
	2231	// if ( typeDecl->get_base() ) {
	2232	// init = new SimpleInit( new SizeofExpr( handleDecl( typeDecl, typeDecl->get_base() ) ), designators );
	2233	// }
	2234	// return new ObjectDecl( typeDecl->get_name(), Declaration::Extern, LinkageSpec::C, 0, new BasicType( Type::Qualifiers(), BasicType::UnsignedInt ), init );
	2235
	2236	scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind();
	2237	return Mutator::mutate( typeDecl );
	2238	}
	2239
	2240	Type * Pass3::mutate( PointerType *pointerType ) {
	2241	TyVarMap oldtyVars = scopeTyVars;
	2242	makeTyVarMap( pointerType, scopeTyVars );
	2243
	2244	Type *ret = Mutator::mutate( pointerType );
	2245
	2246	scopeTyVars = oldtyVars;
	2247	return ret;
	2248	}
	2249
	2250	Type * Pass3::mutate( FunctionType *functionType ) {
	2251	TyVarMap oldtyVars = scopeTyVars;
	2252	makeTyVarMap( functionType, scopeTyVars );
	2253
	2254	Type *ret = Mutator::mutate( functionType );
	2255
	2256	scopeTyVars = oldtyVars;
	2257	return ret;
	2258	}
[01aeade]	2259	} // anonymous namespace
[51b73452]	2260	} // namespace GenPoly
[01aeade]	2261
[51587aa]	2262	// Local Variables: //
	2263	// tab-width: 4 //
	2264	// mode: c++ //
	2265	// compile-command: "make install" //
	2266	// End: //

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