Context Navigation

source: src/GenPoly/Box.cc@ fc638d2

Visit:

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors deferred_resn demangler enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr new-env no_list persistent-indexer pthread-emulation qualifiedEnum resolv-new with_gc

Last change on this file since fc638d2 was 2c57025, checked in by Rob Schluntz <rschlunt@…>, 9 years ago
add support for built-in sized trait which decouples size/alignment information from otype parameters, add test for sized trait
Property mode set to `100644`
File size: 96.6 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
[ca35c51]	11	// Last Modified By : Peter A. Buhr
	12	// Last Modified On : Wed Jun 29 21:43:03 2016
	13	// Update Count : 296
[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"
[89173242]	31	#include "ScopedSet.h"
[51b73452]	32	#include "ScrubTyVars.h"
	33
[68cd1ce]	34	#include "Parser/ParseNode.h"
	35
[cdec5af]	36	#include "SynTree/Constant.h"
[4e284ea6]	37	#include "SynTree/Declaration.h"
[51b73452]	38	#include "SynTree/Expression.h"
	39	#include "SynTree/Initializer.h"
	40	#include "SynTree/Mutator.h"
[4e284ea6]	41	#include "SynTree/Statement.h"
	42	#include "SynTree/Type.h"
	43	#include "SynTree/TypeSubstitution.h"
[68cd1ce]	44
[51b73452]	45	#include "ResolvExpr/TypeEnvironment.h"
[dc12481]	46	#include "ResolvExpr/TypeMap.h"
	47	#include "ResolvExpr/typeops.h"
[68cd1ce]	48
[4e284ea6]	49	#include "SymTab/Indexer.h"
[51b73452]	50	#include "SymTab/Mangler.h"
	51
[e491159]	52	#include "Common/ScopedMap.h"
[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
[9d7b3ea]	65	/// Adds layout-generation functions to polymorphic types
[62e5546]	66	class LayoutFunctionBuilder final : public DeclMutator {
[9d7b3ea]	67	unsigned int functionNesting; // current level of nested functions
	68	public:
	69	LayoutFunctionBuilder() : functionNesting( 0 ) {}
	70
[62e5546]	71	using DeclMutator::mutate;
	72	virtual DeclarationWithType mutate( FunctionDecl functionDecl ) override;
	73	virtual Declaration mutate( StructDecl structDecl ) override;
	74	virtual Declaration mutate( UnionDecl unionDecl ) override;
[9d7b3ea]	75	};
[70a06f6]	76
[f8b961b]	77	/// 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
[62e5546]	78	class Pass1 final : public PolyMutator {
[01aeade]	79	public:
	80	Pass1();
[62e5546]	81
	82	using PolyMutator::mutate;
	83	virtual Expression mutate( ApplicationExpr appExpr ) override;
	84	virtual Expression mutate( AddressExpr addrExpr ) override;
	85	virtual Expression mutate( UntypedExpr expr ) override;
	86	virtual DeclarationWithType* mutate( FunctionDecl *functionDecl ) override;
	87	virtual TypeDecl mutate( TypeDecl typeDecl ) override;
	88	virtual Expression mutate( CommaExpr commaExpr ) override;
	89	virtual Expression mutate( ConditionalExpr condExpr ) override;
	90	virtual Statement * mutate( ReturnStmt *returnStmt ) override;
	91	virtual Type mutate( PointerType pointerType ) override;
	92	virtual Type * mutate( FunctionType *functionType ) override;
	93
	94	virtual void doBeginScope() override;
	95	virtual void doEndScope() override;
[01aeade]	96	private:
[5c52b06]	97	/// Pass the extra type parameters from polymorphic generic arguments or return types into a function application
	98	void passArgTypeVars( ApplicationExpr appExpr, Type parmType, Type argBaseType, std::list< Expression >::iterator &arg, const TyVarMap &exprTyVars, std::set< std::string > &seenTypes );
[05d47278]	99	/// passes extra type parameters into a polymorphic function application
[d9fa60a]	100	void passTypeVars( ApplicationExpr appExpr, Type polyRetType, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars );
[48ca586]	101	/// wraps a function application with a new temporary for the out-parameter return value
[01aeade]	102	Expression addRetParam( ApplicationExpr appExpr, FunctionType function, Type retType, std::list< Expression *>::iterator &arg );
[48ca586]	103	/// Replaces all the type parameters of a generic type with their concrete equivalents under the current environment
	104	void replaceParametersWithConcrete( ApplicationExpr appExpr, std::list< Expression >& params );
	105	/// Replaces a polymorphic type with its concrete equivalant under the current environment (returns itself if concrete).
	106	/// If `doClone` is set to false, will not clone interior types
	107	Type replaceWithConcrete( ApplicationExpr appExpr, Type *type, bool doClone = true );
	108	/// wraps a function application returning a polymorphic type with a new temporary for the out-parameter return value
[d9fa60a]	109	Expression addDynRetParam( ApplicationExpr appExpr, FunctionType function, Type polyType, std::list< Expression *>::iterator &arg );
[01aeade]	110	Expression applyAdapter( ApplicationExpr appExpr, FunctionType function, std::list< Expression >::iterator &arg, const TyVarMap &exprTyVars );
	111	void boxParam( Type formal, Expression &arg, const TyVarMap &exprTyVars );
	112	void boxParams( ApplicationExpr appExpr, FunctionType function, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars );
	113	void addInferredParams( ApplicationExpr appExpr, FunctionType functionType, std::list< Expression *>::iterator &arg, const TyVarMap &tyVars );
[1194734]	114	/// Stores assignment operators from assertion list in local map of assignment operations
[8c49c0e]	115	void findTypeOps( const Type::ForallList &forall );
[01aeade]	116	void passAdapters( ApplicationExpr appExpr, FunctionType functionType, const TyVarMap &exprTyVars );
	117	FunctionDecl makeAdapter( FunctionType adaptee, FunctionType *realType, const std::string &mangleName, const TyVarMap &tyVars );
[05d47278]	118	/// Replaces intrinsic operator functions with their arithmetic desugaring
[01aeade]	119	Expression handleIntrinsics( ApplicationExpr appExpr );
[05d47278]	120	/// Inserts a new temporary variable into the current scope with an auto-generated name
[01aeade]	121	ObjectDecl makeTemporary( Type type );
[c29d9ce]	122
[c2ad3c9]	123	ScopedMap< std::string, DeclarationWithType* > assignOps; ///< Currently known type variable assignment operators
	124	ScopedMap< std::string, DeclarationWithType* > ctorOps; ///< Currently known type variable constructors
	125	ScopedMap< std::string, DeclarationWithType* > copyOps; ///< Currently known type variable copy constructors
	126	ScopedMap< std::string, DeclarationWithType* > dtorOps; ///< Currently known type variable destructors
[89173242]	127	ResolvExpr::TypeMap< DeclarationWithType > scopedAssignOps; ///< Currently known assignment operators
[c2ad3c9]	128	ResolvExpr::TypeMap< DeclarationWithType > scopedCtorOps; ///< Currently known assignment operators
	129	ResolvExpr::TypeMap< DeclarationWithType > scopedCopyOps; ///< Currently known assignment operators
	130	ResolvExpr::TypeMap< DeclarationWithType > scopedDtorOps; ///< Currently known assignment operators
[89173242]	131	ScopedMap< std::string, DeclarationWithType* > adapters; ///< Set of adapter functions in the current scope
[70a06f6]	132
[01aeade]	133	DeclarationWithType *retval;
	134	bool useRetval;
	135	UniqueName tempNamer;
	136	};
	137
[89173242]	138	/// * Moves polymorphic returns in function types to pointer-type parameters
	139	/// * adds type size and assertion parameters to parameter lists
[62e5546]	140	class Pass2 final : public PolyMutator {
[01aeade]	141	public:
	142	template< typename DeclClass >
	143	DeclClass handleDecl( DeclClass decl, Type *type );
[62e5546]	144
	145	using PolyMutator::mutate;
	146	virtual DeclarationWithType mutate( FunctionDecl functionDecl ) override;
	147	virtual ObjectDecl mutate( ObjectDecl objectDecl ) override;
	148	virtual TypeDecl mutate( TypeDecl typeDecl ) override;
	149	virtual TypedefDecl mutate( TypedefDecl typedefDecl ) override;
	150	virtual Type mutate( PointerType pointerType ) override;
	151	virtual Type mutate( FunctionType funcType ) override;
[70a06f6]	152
[01aeade]	153	private:
	154	void addAdapters( FunctionType *functionType );
[ae63a18]	155
[01aeade]	156	std::map< UniqueId, std::string > adapterName;
	157	};
	158
[8a34677]	159	/// Replaces member and size/align/offsetof expressions on polymorphic generic types with calculated expressions.
	160	/// * Replaces member expressions for polymorphic types with calculated add-field-offset-and-dereference
	161	/// * Calculates polymorphic offsetof expressions from offset array
	162	/// * Inserts dynamic calculation of polymorphic type layouts where needed
[62e5546]	163	class PolyGenericCalculator final : public PolyMutator {
[8a34677]	164	public:
[1ba88a0]	165	typedef PolyMutator Parent;
	166	using Parent::mutate;
	167
[05d47278]	168	template< typename DeclClass >
	169	DeclClass handleDecl( DeclClass decl, Type *type );
[62e5546]	170	virtual DeclarationWithType mutate( FunctionDecl functionDecl ) override;
	171	virtual ObjectDecl mutate( ObjectDecl objectDecl ) override;
	172	virtual TypedefDecl mutate( TypedefDecl objectDecl ) override;
	173	virtual TypeDecl mutate( TypeDecl objectDecl ) override;
	174	virtual Statement mutate( DeclStmt declStmt ) override;
	175	virtual Type mutate( PointerType pointerType ) override;
	176	virtual Type mutate( FunctionType funcType ) override;
	177	virtual Expression mutate( MemberExpr memberExpr ) override;
	178	virtual Expression mutate( SizeofExpr sizeofExpr ) override;
	179	virtual Expression mutate( AlignofExpr alignofExpr ) override;
	180	virtual Expression mutate( OffsetofExpr offsetofExpr ) override;
	181	virtual Expression mutate( OffsetPackExpr offsetPackExpr ) override;
	182
	183	virtual void doBeginScope() override;
	184	virtual void doEndScope() override;
[8a34677]	185
	186	private:
	187	/// Makes a new variable in the current scope with the given name, type & optional initializer
	188	ObjectDecl makeVar( const std::string &name, Type type, Initializer *init = 0 );
	189	/// returns true if the type has a dynamic layout; such a layout will be stored in appropriately-named local variables when the function returns
	190	bool findGeneric( Type *ty );
	191	/// adds type parameters to the layout call; will generate the appropriate parameters if needed
	192	void addOtypeParamsToLayoutCall( UntypedExpr layoutCall, const std::list< Type > &otypeParams );
[aa19ccf]	193
	194	/// Enters a new scope for type-variables, adding the type variables from ty
	195	void beginTypeScope( Type *ty );
	196	/// Exits the type-variable scope
	197	void endTypeScope();
[70a06f6]	198
[8a34677]	199	ScopedSet< std::string > knownLayouts; ///< Set of generic type layouts known in the current scope, indexed by sizeofName
	200	ScopedSet< std::string > knownOffsets; ///< Set of non-generic types for which the offset array exists in the current scope, indexed by offsetofName
[05d47278]	201	};
[b4cd03b7]	202
[f8b961b]	203	/// 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
[62e5546]	204	class Pass3 final : public PolyMutator {
[01aeade]	205	public:
	206	template< typename DeclClass >
	207	DeclClass handleDecl( DeclClass decl, Type *type );
[62e5546]	208
	209	using PolyMutator::mutate;
	210	virtual DeclarationWithType mutate( FunctionDecl functionDecl ) override;
	211	virtual ObjectDecl mutate( ObjectDecl objectDecl ) override;
	212	virtual TypedefDecl mutate( TypedefDecl objectDecl ) override;
	213	virtual TypeDecl mutate( TypeDecl objectDecl ) override;
	214	virtual Type mutate( PointerType pointerType ) override;
	215	virtual Type mutate( FunctionType funcType ) override;
[01aeade]	216	private:
	217	};
	218
	219	} // anonymous namespace
	220
[05d47278]	221	/// version of mutateAll with special handling for translation unit so you can check the end of the prelude when debugging
	222	template< typename MutatorType >
	223	inline void mutateTranslationUnit( std::list< Declaration* > &translationUnit, MutatorType &mutator ) {
	224	bool seenIntrinsic = false;
	225	SemanticError errors;
	226	for ( typename std::list< Declaration* >::iterator i = translationUnit.begin(); i != translationUnit.end(); ++i ) {
	227	try {
	228	if ( *i ) {
	229	if ( (*i)->get_linkage() == LinkageSpec::Intrinsic ) {
	230	seenIntrinsic = true;
	231	} else if ( seenIntrinsic ) {
	232	seenIntrinsic = false; // break on this line when debugging for end of prelude
	233	}
[b4cd03b7]	234
[05d47278]	235	i = dynamic_cast< Declaration >( (*i)->acceptMutator( mutator ) );
	236	assert( *i );
	237	} // if
	238	} catch( SemanticError &e ) {
	239	errors.append( e );
	240	} // try
	241	} // for
	242	if ( ! errors.isEmpty() ) {
	243	throw errors;
	244	} // if
	245	}
	246
[01aeade]	247	void box( std::list< Declaration *>& translationUnit ) {
[9d7b3ea]	248	LayoutFunctionBuilder layoutBuilder;
[01aeade]	249	Pass1 pass1;
	250	Pass2 pass2;
[8a34677]	251	PolyGenericCalculator polyCalculator;
[01aeade]	252	Pass3 pass3;
[70a06f6]	253
[9d7b3ea]	254	layoutBuilder.mutateDeclarationList( translationUnit );
[05d47278]	255	mutateTranslationUnit/All/( translationUnit, pass1 );
	256	mutateTranslationUnit/All/( translationUnit, pass2 );
[8a34677]	257	mutateTranslationUnit/All/( translationUnit, polyCalculator );
[05d47278]	258	mutateTranslationUnit/All/( translationUnit, pass3 );
[6c3744e]	259	}
	260
[9d7b3ea]	261	////////////////////////////////// LayoutFunctionBuilder ////////////////////////////////////////////
	262
	263	DeclarationWithType LayoutFunctionBuilder::mutate( FunctionDecl functionDecl ) {
	264	functionDecl->set_functionType( maybeMutate( functionDecl->get_functionType(), *this ) );
	265	mutateAll( functionDecl->get_oldDecls(), *this );
	266	++functionNesting;
	267	functionDecl->set_statements( maybeMutate( functionDecl->get_statements(), *this ) );
	268	--functionNesting;
	269	return functionDecl;
	270	}
[70a06f6]	271
[9d7b3ea]	272	/// Get a list of type declarations that will affect a layout function
	273	std::list< TypeDecl* > takeOtypeOnly( std::list< TypeDecl* > &decls ) {
	274	std::list< TypeDecl * > otypeDecls;
	275
	276	for ( std::list< TypeDecl* >::const_iterator decl = decls.begin(); decl != decls.end(); ++decl ) {
[2c57025]	277	if ( (*decl)->isComplete() ) {
[9d7b3ea]	278	otypeDecls.push_back( *decl );
	279	}
	280	}
[70a06f6]	281
[9d7b3ea]	282	return otypeDecls;
	283	}
	284
	285	/// Adds parameters for otype layout to a function type
	286	void addOtypeParams( FunctionType layoutFnType, std::list< TypeDecl > &otypeParams ) {
	287	BasicType sizeAlignType( Type::Qualifiers(), BasicType::LongUnsignedInt );
[70a06f6]	288
[9d7b3ea]	289	for ( std::list< TypeDecl* >::const_iterator param = otypeParams.begin(); param != otypeParams.end(); ++param ) {
[2e60a1a]	290	TypeInstType paramType( Type::Qualifiers(), (param)->get_name(), param );
[adc6781]	291	std::string paramName = mangleType( &paramType );
	292	layoutFnType->get_parameters().push_back( new ObjectDecl( sizeofName( paramName ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignType.clone(), 0 ) );
	293	layoutFnType->get_parameters().push_back( new ObjectDecl( alignofName( paramName ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignType.clone(), 0 ) );
[9d7b3ea]	294	}
	295	}
	296
	297	/// Builds a layout function declaration
[adc6781]	298	FunctionDecl buildLayoutFunctionDecl( AggregateDecl typeDecl, unsigned int functionNesting, FunctionType *layoutFnType ) {
[9d7b3ea]	299	// Routines at global scope marked "static" to prevent multiple definitions is separate translation units
	300	// because each unit generates copies of the default routines for each aggregate.
	301	FunctionDecl *layoutDecl = new FunctionDecl(
[adc6781]	302	layoutofName( typeDecl ), functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, layoutFnType, new CompoundStmt( noLabels ), true, false );
[9d7b3ea]	303	layoutDecl->fixUniqueId();
	304	return layoutDecl;
	305	}
	306
	307	/// Makes a unary operation
	308	Expression makeOp( const std::string &name, Expression arg ) {
	309	UntypedExpr *expr = new UntypedExpr( new NameExpr( name ) );
	310	expr->get_args().push_back( arg );
	311	return expr;
	312	}
	313
	314	/// Makes a binary operation
	315	Expression makeOp( const std::string &name, Expression lhs, Expression *rhs ) {
	316	UntypedExpr *expr = new UntypedExpr( new NameExpr( name ) );
	317	expr->get_args().push_back( lhs );
	318	expr->get_args().push_back( rhs );
	319	return expr;
	320	}
	321
	322	/// Returns the dereference of a local pointer variable
	323	Expression derefVar( ObjectDecl var ) {
	324	return makeOp( "*?", new VariableExpr( var ) );
	325	}
	326
	327	/// makes an if-statement with a single-expression if-block and no then block
	328	Statement makeCond( Expression cond, Expression *ifPart ) {
[3627356]	329	return new IfStmt( noLabels, cond, new ExprStmt( noLabels, ifPart ), 0 );
[9d7b3ea]	330	}
	331
	332	/// makes a statement that assigns rhs to lhs if lhs < rhs
	333	Statement makeAssignMax( Expression lhs, Expression *rhs ) {
	334	return makeCond( makeOp( "?<?", lhs, rhs ), makeOp( "?=?", lhs->clone(), rhs->clone() ) );
	335	}
	336
	337	/// makes a statement that aligns lhs to rhs (rhs should be an integer power of two)
	338	Statement makeAlignTo( Expression lhs, Expression *rhs ) {
	339	// check that the lhs is zeroed out to the level of rhs
	340	Expression *ifCond = makeOp( "?&?", lhs, makeOp( "?-?", rhs, new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), "1" ) ) ) );
	341	// if not aligned, increment to alignment
	342	Expression *ifExpr = makeOp( "?+=?", lhs->clone(), makeOp( "?-?", rhs->clone(), ifCond->clone() ) );
	343	return makeCond( ifCond, ifExpr );
	344	}
[70a06f6]	345
[9d7b3ea]	346	/// adds an expression to a compound statement
	347	void addExpr( CompoundStmt stmts, Expression expr ) {
	348	stmts->get_kids().push_back( new ExprStmt( noLabels, expr ) );
	349	}
	350
	351	/// adds a statement to a compound statement
	352	void addStmt( CompoundStmt stmts, Statement stmt ) {
	353	stmts->get_kids().push_back( stmt );
	354	}
[70a06f6]	355
[3627356]	356	Declaration LayoutFunctionBuilder::mutate( StructDecl structDecl ) {
[9d7b3ea]	357	// do not generate layout function for "empty" tag structs
	358	if ( structDecl->get_members().empty() ) return structDecl;
	359
	360	// get parameters that can change layout, exiting early if none
	361	std::list< TypeDecl* > otypeParams = takeOtypeOnly( structDecl->get_parameters() );
	362	if ( otypeParams.empty() ) return structDecl;
	363
	364	// build layout function signature
	365	FunctionType *layoutFnType = new FunctionType( Type::Qualifiers(), false );
	366	BasicType *sizeAlignType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	367	PointerType *sizeAlignOutType = new PointerType( Type::Qualifiers(), sizeAlignType );
[70a06f6]	368
[adc6781]	369	ObjectDecl *sizeParam = new ObjectDecl( sizeofName( structDecl->get_name() ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType, 0 );
[9d7b3ea]	370	layoutFnType->get_parameters().push_back( sizeParam );
[adc6781]	371	ObjectDecl *alignParam = new ObjectDecl( alignofName( structDecl->get_name() ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType->clone(), 0 );
[9d7b3ea]	372	layoutFnType->get_parameters().push_back( alignParam );
[adc6781]	373	ObjectDecl *offsetParam = new ObjectDecl( offsetofName( structDecl->get_name() ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType->clone(), 0 );
[9d7b3ea]	374	layoutFnType->get_parameters().push_back( offsetParam );
	375	addOtypeParams( layoutFnType, otypeParams );
	376
	377	// build function decl
[adc6781]	378	FunctionDecl *layoutDecl = buildLayoutFunctionDecl( structDecl, functionNesting, layoutFnType );
[9d7b3ea]	379
	380	// calculate struct layout in function body
	381
	382	// initialize size and alignment to 0 and 1 (will have at least one member to re-edit size
	383	addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( sizeParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "0" ) ) ) );
	384	addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( alignParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "1" ) ) ) );
	385	unsigned long n_members = 0;
	386	bool firstMember = true;
	387	for ( std::list< Declaration* >::const_iterator member = structDecl->get_members().begin(); member != structDecl->get_members().end(); ++member ) {
	388	DeclarationWithType dwt = dynamic_cast< DeclarationWithType >( *member );
	389	assert( dwt );
[bd91e2a]	390	Type *memberType = dwt->get_type();
[9d7b3ea]	391
	392	if ( firstMember ) {
	393	firstMember = false;
	394	} else {
	395	// make sure all members after the first (automatically aligned at 0) are properly padded for alignment
[bd91e2a]	396	addStmt( layoutDecl->get_statements(), makeAlignTo( derefVar( sizeParam ), new AlignofExpr( memberType->clone() ) ) );
[9d7b3ea]	397	}
[70a06f6]	398
[9d7b3ea]	399	// place current size in the current offset index
[cb4c607]	400	addExpr( layoutDecl->get_statements(), makeOp( "?=?", makeOp( "?[?]", new VariableExpr( offsetParam ), new ConstantExpr( Constant::from_ulong( n_members ) ) ),
[9d7b3ea]	401	derefVar( sizeParam ) ) );
	402	++n_members;
	403
	404	// add member size to current size
[bd91e2a]	405	addExpr( layoutDecl->get_statements(), makeOp( "?+=?", derefVar( sizeParam ), new SizeofExpr( memberType->clone() ) ) );
[70a06f6]	406
[9d7b3ea]	407	// take max of member alignment and global alignment
[bd91e2a]	408	addStmt( layoutDecl->get_statements(), makeAssignMax( derefVar( alignParam ), new AlignofExpr( memberType->clone() ) ) );
[9d7b3ea]	409	}
	410	// make sure the type is end-padded to a multiple of its alignment
	411	addStmt( layoutDecl->get_statements(), makeAlignTo( derefVar( sizeParam ), derefVar( alignParam ) ) );
	412
	413	addDeclarationAfter( layoutDecl );
	414	return structDecl;
	415	}
[70a06f6]	416
[3627356]	417	Declaration LayoutFunctionBuilder::mutate( UnionDecl unionDecl ) {
[9d7b3ea]	418	// do not generate layout function for "empty" tag unions
	419	if ( unionDecl->get_members().empty() ) return unionDecl;
[70a06f6]	420
[9d7b3ea]	421	// get parameters that can change layout, exiting early if none
	422	std::list< TypeDecl* > otypeParams = takeOtypeOnly( unionDecl->get_parameters() );
	423	if ( otypeParams.empty() ) return unionDecl;
	424
	425	// build layout function signature
	426	FunctionType *layoutFnType = new FunctionType( Type::Qualifiers(), false );
	427	BasicType *sizeAlignType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	428	PointerType *sizeAlignOutType = new PointerType( Type::Qualifiers(), sizeAlignType );
[70a06f6]	429
[adc6781]	430	ObjectDecl *sizeParam = new ObjectDecl( sizeofName( unionDecl->get_name() ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType, 0 );
[9d7b3ea]	431	layoutFnType->get_parameters().push_back( sizeParam );
[adc6781]	432	ObjectDecl *alignParam = new ObjectDecl( alignofName( unionDecl->get_name() ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType->clone(), 0 );
[9d7b3ea]	433	layoutFnType->get_parameters().push_back( alignParam );
	434	addOtypeParams( layoutFnType, otypeParams );
	435
	436	// build function decl
[adc6781]	437	FunctionDecl *layoutDecl = buildLayoutFunctionDecl( unionDecl, functionNesting, layoutFnType );
[9d7b3ea]	438
	439	// calculate union layout in function body
	440	addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( sizeParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "1" ) ) ) );
	441	addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( alignParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "1" ) ) ) );
	442	for ( std::list< Declaration* >::const_iterator member = unionDecl->get_members().begin(); member != unionDecl->get_members().end(); ++member ) {
	443	DeclarationWithType dwt = dynamic_cast< DeclarationWithType >( *member );
	444	assert( dwt );
[bd91e2a]	445	Type *memberType = dwt->get_type();
[70a06f6]	446
[9d7b3ea]	447	// take max member size and global size
[bd91e2a]	448	addStmt( layoutDecl->get_statements(), makeAssignMax( derefVar( sizeParam ), new SizeofExpr( memberType->clone() ) ) );
[70a06f6]	449
[9d7b3ea]	450	// take max of member alignment and global alignment
[bd91e2a]	451	addStmt( layoutDecl->get_statements(), makeAssignMax( derefVar( alignParam ), new AlignofExpr( memberType->clone() ) ) );
[9d7b3ea]	452	}
	453	// make sure the type is end-padded to a multiple of its alignment
	454	addStmt( layoutDecl->get_statements(), makeAlignTo( derefVar( sizeParam ), derefVar( alignParam ) ) );
	455
	456	addDeclarationAfter( layoutDecl );
	457	return unionDecl;
	458	}
[70a06f6]	459
[01aeade]	460	////////////////////////////////////////// Pass1 ////////////////////////////////////////////////////
	461
	462	namespace {
[bdf1954]	463	std::string makePolyMonoSuffix( FunctionType * function, const TyVarMap &tyVars ) {
	464	std::stringstream name;
	465
[ed1065c]	466	// NOTE: this function previously used isPolyObj, which failed to produce
	467	// the correct thing in some situations. It's not clear to me why this wasn't working.
	468
[ae63a18]	469	// if the return type or a parameter type involved polymorphic types, then the adapter will need
	470	// to take those polymorphic types as pointers. Therefore, there can be two different functions
[bdf1954]	471	// with the same mangled name, so we need to further mangle the names.
[ed1065c]	472	for ( std::list< DeclarationWithType *>::iterator retval = function->get_returnVals().begin(); retval != function->get_returnVals().end(); ++retval ) {
[ffad73a]	473	if ( isPolyType( (*retval)->get_type(), tyVars ) ) {
[ed1065c]	474	name << "P";
	475	} else {
	476	name << "M";
	477	}
[bdf1954]	478	}
	479	name << "_";
	480	std::list< DeclarationWithType *> &paramList = function->get_parameters();
	481	for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) {
[ffad73a]	482	if ( isPolyType( (*arg)->get_type(), tyVars ) ) {
[bdf1954]	483	name << "P";
	484	} else {
[ae63a18]	485	name << "M";
[bdf1954]	486	}
	487	} // for
	488	return name.str();
	489	}
	490
	491	std::string mangleAdapterName( FunctionType * function, const TyVarMap &tyVars ) {
	492	return SymTab::Mangler::mangle( function ) + makePolyMonoSuffix( function, tyVars );
	493	}
	494
[01aeade]	495	std::string makeAdapterName( const std::string &mangleName ) {
	496	return "_adapter" + mangleName;
	497	}
[6c3744e]	498
[6635c74]	499	Pass1::Pass1() : useRetval( false ), tempNamer( "_temp" ) {}
[01aeade]	500
[c2ad3c9]	501	/// Returns T if the given declaration is a function with parameter (T*) for some TypeInstType T, NULL otherwise
	502	TypeInstType isTypeInstPtrFn( DeclarationWithType decl ) {
	503	if ( FunctionType *funType = getFunctionType( decl->get_type() ) ) {
	504	if ( funType->get_parameters().size() == 1 ) {
	505	if ( PointerType pointer = dynamic_cast< PointerType >( funType->get_parameters().front()->get_type() ) ) {
	506	if ( TypeInstType refType = dynamic_cast< TypeInstType >( pointer->get_base() ) ) {
	507	return refType;
	508	} // if
	509	} // if
	510	} // if
	511	} // if
	512	return 0;
	513	}
[9799ec8]	514
[c2ad3c9]	515	/// Returns T if the given declaration is a function with parameters (T*, T) for some TypeInstType T, NULL otherwise
	516	TypeInstType isTypeInstPtrValFn( DeclarationWithType decl ) {
	517	if ( FunctionType *funType = getFunctionType( decl->get_type() ) ) {
	518	if ( funType->get_parameters().size() == 2 ) {
	519	if ( PointerType pointer = dynamic_cast< PointerType >( funType->get_parameters().front()->get_type() ) ) {
	520	if ( TypeInstType refType = dynamic_cast< TypeInstType >( pointer->get_base() ) ) {
	521	if ( TypeInstType refType2 = dynamic_cast< TypeInstType >( funType->get_parameters().back()->get_type() ) ) {
	522	if ( refType->get_name() == refType2->get_name() ) {
	523	return refType;
[01aeade]	524	} // if
	525	} // if
	526	} // if
	527	} // if
	528	} // if
	529	} // if
[1194734]	530	return 0;
[01aeade]	531	}
[9799ec8]	532
[c2ad3c9]	533	/// Returns T if the given declaration is (?=?)(T , T) for some TypeInstType T (return not checked, but maybe should be), NULL otherwise
	534	TypeInstType isTypeInstAssignment( DeclarationWithType decl ) {
	535	return decl->get_name() == "?=?" ? isTypeInstPtrValFn( decl ) : 0;
	536	}
[70a06f6]	537
[c2ad3c9]	538	/// Returns T if the given declaration is (?{})(T ) for some TypeInstType T (return not checked, but maybe should be), NULL otherwise
	539	TypeInstType isTypeInstCtor( DeclarationWithType decl ) {
	540	return decl->get_name() == "?{}" ? isTypeInstPtrFn( decl ) : 0;
	541	}
	542
	543	/// Returns T if the given declaration is (?{})(T , T) for some TypeInstType T (return not checked, but maybe should be), NULL otherwise
	544	TypeInstType isTypeInstCopy( DeclarationWithType decl ) {
	545	return decl->get_name() == "?{}" ? isTypeInstPtrValFn( decl ) : 0;
	546	}
	547
	548	/// Returns T if the given declaration is (^?{})(T ) for some TypeInstType T (return not checked, but maybe should be), NULL otherwise
	549	TypeInstType isTypeInstDtor( DeclarationWithType decl ) {
	550	return decl->get_name() == "^?{}" ? isTypeInstPtrFn( decl ) : 0;
	551	}
	552
	553	/// Returns T if the given declaration is a function with parameters (T*, T) for some type T, where neither parameter is cv-qualified,
	554	/// NULL otherwise
	555	Type isNoCvPtrFn( DeclarationWithType decl ) {
	556	if ( FunctionType *funType = getFunctionType( decl->get_type() ) ) {
	557	if ( funType->get_parameters().size() == 1 ) {
	558	Type::Qualifiers defaultQualifiers;
	559	Type *paramType = funType->get_parameters().front()->get_type();
	560	if ( paramType->get_qualifiers() != defaultQualifiers ) return 0;
	561
	562	if ( PointerType pointerType = dynamic_cast< PointerType >( paramType ) ) {
	563	Type *baseType = pointerType->get_base();
	564	if ( baseType->get_qualifiers() == defaultQualifiers ) {
	565	return baseType;
	566	} // if
	567	} // if
	568	} // if
	569	} // if
	570	return 0;
	571	}
[9799ec8]	572
[c2ad3c9]	573	/// Returns T if the given declaration is a function with parameters (T*, T) for some type T, where neither parameter is cv-qualified,
	574	/// NULL otherwise
	575	Type isNoCvPtrValFn( DeclarationWithType decl ) {
	576	if ( FunctionType *funType = getFunctionType( decl->get_type() ) ) {
	577	if ( funType->get_parameters().size() == 2 ) {
	578	Type::Qualifiers defaultQualifiers;
	579	Type *paramType1 = funType->get_parameters().front()->get_type();
	580	if ( paramType1->get_qualifiers() != defaultQualifiers ) return 0;
	581	Type *paramType2 = funType->get_parameters().back()->get_type();
	582	if ( paramType2->get_qualifiers() != defaultQualifiers ) return 0;
	583
	584	if ( PointerType pointerType = dynamic_cast< PointerType >( paramType1 ) ) {
	585	Type *baseType1 = pointerType->get_base();
	586	if ( baseType1->get_qualifiers() != defaultQualifiers ) return 0;
	587	SymTab::Indexer dummy;
	588	if ( ResolvExpr::typesCompatible( baseType1, paramType2, dummy ) ) {
	589	return baseType1;
[dc12481]	590	} // if
	591	} // if
	592	} // if
	593	} // if
	594	return 0;
	595	}
[01aeade]	596
[c2ad3c9]	597	/// returns T if the given declaration is: (?=?)(T , T) for some type T (return not checked, but maybe should be), NULL otherwise
	598	/// Only picks assignments where neither parameter is cv-qualified
	599	Type isAssignment( DeclarationWithType decl ) {
	600	return decl->get_name() == "?=?" ? isNoCvPtrValFn( decl ) : 0;
	601	}
	602
	603	/// returns T if the given declaration is: (?{})(T ) for some type T, NULL otherwise
	604	/// Only picks ctors where the parameter is not cv-qualified
	605	Type isCtor( DeclarationWithType decl ) {
	606	return decl->get_name() == "?{}" ? isNoCvPtrFn( decl ) : 0;
	607	}
	608
	609	/// returns T if the given declaration is: (?{})(T , T) for some type T (return not checked, but maybe should be), NULL otherwise
	610	/// Only picks copy constructors where neither parameter is cv-qualified
	611	Type isCopy( DeclarationWithType decl ) {
	612	return decl->get_name() == "?{}" ? isNoCvPtrValFn( decl ) : 0;
	613	}
	614
	615	/// returns T if the given declaration is: (?{})(T ) for some type T, NULL otherwise
	616	/// Only picks ctors where the parameter is not cv-qualified
	617	Type isDtor( DeclarationWithType decl ) {
	618	return decl->get_name() == "^?{}" ? isNoCvPtrFn( decl ) : 0;
	619	}
	620
[8c49c0e]	621	void Pass1::findTypeOps( const Type::ForallList &forall ) {
[ed1065c]	622	// what if a nested function uses an assignment operator?
	623	// assignOps.clear();
[8c49c0e]	624	for ( Type::ForallList::const_iterator i = forall.begin(); i != forall.end(); ++i ) {
[01aeade]	625	for ( std::list< DeclarationWithType >::const_iterator assert = (i)->get_assertions().begin(); assert != (*i)->get_assertions().end(); ++assert ) {
	626	std::string typeName;
[dc12481]	627	if ( TypeInstType typeInst = isTypeInstAssignment( assert ) ) {
[1194734]	628	assignOps[ typeInst->get_name() ] = *assert;
[c2ad3c9]	629	} else if ( TypeInstType typeInst = isTypeInstCtor( assert ) ) {
	630	ctorOps[ typeInst->get_name() ] = *assert;
	631	} else if ( TypeInstType typeInst = isTypeInstCopy( assert ) ) {
	632	copyOps[ typeInst->get_name() ] = *assert;
	633	} else if ( TypeInstType typeInst = isTypeInstDtor( assert ) ) {
	634	dtorOps[ typeInst->get_name() ] = *assert;
[01aeade]	635	} // if
	636	} // for
	637	} // for
	638	}
	639
[82dd287]	640	DeclarationWithType Pass1::mutate( FunctionDecl functionDecl ) {
[89173242]	641	// if this is a assignment function, put it in the map for this scope
[c2ad3c9]	642	if ( Type *paramType = isAssignment( functionDecl ) ) {
	643	if ( ! dynamic_cast< TypeInstType* >( paramType ) ) {
	644	scopedAssignOps.insert( paramType, functionDecl );
	645	}
	646	} else if ( Type *paramType = isCtor( functionDecl ) ) {
	647	if ( ! dynamic_cast< TypeInstType* >( paramType ) ) {
	648	scopedCtorOps.insert( paramType, functionDecl );
	649	}
	650	} else if ( Type *paramType = isCopy( functionDecl ) ) {
	651	if ( ! dynamic_cast< TypeInstType* >( paramType ) ) {
	652	scopedCopyOps.insert( paramType, functionDecl );
	653	}
	654	} else if ( Type *paramType = isDtor( functionDecl ) ) {
	655	if ( ! dynamic_cast< TypeInstType* >( paramType ) ) {
	656	scopedDtorOps.insert( paramType, functionDecl );
[1194734]	657	}
	658	}
[b4cd03b7]	659
[e56cfdb0]	660	if ( functionDecl->get_statements() ) { // empty routine body ?
	661	doBeginScope();
[4b8f918]	662	scopeTyVars.beginScope();
[63c0dbf]	663	assignOps.beginScope();
[c2ad3c9]	664	ctorOps.beginScope();
	665	copyOps.beginScope();
	666	dtorOps.beginScope();
[9799ec8]	667
[01aeade]	668	DeclarationWithType *oldRetval = retval;
	669	bool oldUseRetval = useRetval;
[e56cfdb0]	670
	671	// process polymorphic return value
[01aeade]	672	retval = 0;
[3bb195cb]	673	if ( isDynRet( functionDecl->get_functionType() ) && functionDecl->get_linkage() == LinkageSpec::Cforall ) {
[01aeade]	674	retval = functionDecl->get_functionType()->get_returnVals().front();
[ae63a18]	675
[01aeade]	676	// give names to unnamed return values
	677	if ( retval->get_name() == "" ) {
	678	retval->set_name( "_retparm" );
	679	retval->set_linkage( LinkageSpec::C );
	680	} // if
	681	} // if
[ae63a18]	682
[e56cfdb0]	683	FunctionType *functionType = functionDecl->get_functionType();
[01aeade]	684	makeTyVarMap( functionDecl->get_functionType(), scopeTyVars );
[c2ad3c9]	685	findTypeOps( functionDecl->get_functionType()->get_forall() );
[e56cfdb0]	686
	687	std::list< DeclarationWithType *> &paramList = functionType->get_parameters();
	688	std::list< FunctionType *> functions;
[8c49c0e]	689	for ( Type::ForallList::iterator tyVar = functionType->get_forall().begin(); tyVar != functionType->get_forall().end(); ++tyVar ) {
[e56cfdb0]	690	for ( std::list< DeclarationWithType >::iterator assert = (tyVar)->get_assertions().begin(); assert != (*tyVar)->get_assertions().end(); ++assert ) {
	691	findFunction( (*assert)->get_type(), functions, scopeTyVars, needsAdapter );
	692	} // for
	693	} // for
	694	for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) {
	695	findFunction( (*arg)->get_type(), functions, scopeTyVars, needsAdapter );
	696	} // for
[b4cd03b7]	697
[e56cfdb0]	698	for ( std::list< FunctionType *>::iterator funType = functions.begin(); funType != functions.end(); ++funType ) {
[bdf1954]	699	std::string mangleName = mangleAdapterName( *funType, scopeTyVars );
[e56cfdb0]	700	if ( adapters.find( mangleName ) == adapters.end() ) {
	701	std::string adapterName = makeAdapterName( mangleName );
	702	adapters.insert( std::pair< std::string, DeclarationWithType >( mangleName, new ObjectDecl( adapterName, DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new PointerType( Type::Qualifiers(), makeAdapterType( funType, scopeTyVars ) ), 0 ) ) );
	703	} // if
	704	} // for
	705
[01aeade]	706	functionDecl->set_statements( functionDecl->get_statements()->acceptMutator( *this ) );
[ae63a18]	707
[6f49cdf]	708	scopeTyVars.endScope();
[63c0dbf]	709	assignOps.endScope();
[c2ad3c9]	710	ctorOps.endScope();
	711	copyOps.endScope();
	712	dtorOps.endScope();
[01aeade]	713	retval = oldRetval;
	714	useRetval = oldUseRetval;
[e56cfdb0]	715	doEndScope();
[01aeade]	716	} // if
	717	return functionDecl;
	718	}
[6c3744e]	719
[01aeade]	720	TypeDecl Pass1::mutate( TypeDecl typeDecl ) {
[2c57025]	721	addToTyVarMap( typeDecl, scopeTyVars );
[01aeade]	722	return Mutator::mutate( typeDecl );
	723	}
[6c3744e]	724
[01aeade]	725	Expression Pass1::mutate( CommaExpr commaExpr ) {
	726	bool oldUseRetval = useRetval;
	727	useRetval = false;
	728	commaExpr->set_arg1( maybeMutate( commaExpr->get_arg1(), *this ) );
	729	useRetval = oldUseRetval;
	730	commaExpr->set_arg2( maybeMutate( commaExpr->get_arg2(), *this ) );
	731	return commaExpr;
	732	}
[6c3744e]	733
[01aeade]	734	Expression Pass1::mutate( ConditionalExpr condExpr ) {
	735	bool oldUseRetval = useRetval;
	736	useRetval = false;
	737	condExpr->set_arg1( maybeMutate( condExpr->get_arg1(), *this ) );
	738	useRetval = oldUseRetval;
	739	condExpr->set_arg2( maybeMutate( condExpr->get_arg2(), *this ) );
	740	condExpr->set_arg3( maybeMutate( condExpr->get_arg3(), *this ) );
	741	return condExpr;
[6c3744e]	742
[01aeade]	743	}
[6c3744e]	744
[5c52b06]	745	void Pass1::passArgTypeVars( ApplicationExpr appExpr, Type parmType, Type argBaseType, std::list< Expression >::iterator &arg, const TyVarMap &exprTyVars, std::set< std::string > &seenTypes ) {
[4b8f918]	746	Type *polyType = isPolyType( parmType, exprTyVars );
	747	if ( polyType && ! dynamic_cast< TypeInstType* >( polyType ) ) {
	748	std::string typeName = mangleType( polyType );
[adc6781]	749	if ( seenTypes.count( typeName ) ) return;
[5c52b06]	750
	751	arg = appExpr->get_args().insert( arg, new SizeofExpr( argBaseType->clone() ) );
	752	arg++;
	753	arg = appExpr->get_args().insert( arg, new AlignofExpr( argBaseType->clone() ) );
	754	arg++;
[4b8f918]	755	if ( dynamic_cast< StructInstType* >( polyType ) ) {
[5c52b06]	756	if ( StructInstType argBaseStructType = dynamic_cast< StructInstType >( argBaseType ) ) {
[89173242]	757	// zero-length arrays are forbidden by C, so don't pass offset for empty struct
	758	if ( ! argBaseStructType->get_baseStruct()->get_members().empty() ) {
[d75038c]	759	arg = appExpr->get_args().insert( arg, new OffsetPackExpr( argBaseStructType->clone() ) );
[89173242]	760	arg++;
	761	}
[5c52b06]	762	} else {
	763	throw SemanticError( "Cannot pass non-struct type for generic struct" );
	764	}
	765	}
	766
[adc6781]	767	seenTypes.insert( typeName );
[5c52b06]	768	}
	769	}
	770
[d9fa60a]	771	void Pass1::passTypeVars( ApplicationExpr appExpr, Type polyRetType, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars ) {
[7754cde]	772	// pass size/align for type variables
[01aeade]	773	for ( TyVarMap::const_iterator tyParm = exprTyVars.begin(); tyParm != exprTyVars.end(); ++tyParm ) {
	774	ResolvExpr::EqvClass eqvClass;
	775	assert( env );
[2c57025]	776	if ( tyParm->second.isComplete ) {
[01aeade]	777	Type *concrete = env->lookup( tyParm->first );
	778	if ( concrete ) {
	779	arg = appExpr->get_args().insert( arg, new SizeofExpr( concrete->clone() ) );
	780	arg++;
[db0b3ce]	781	arg = appExpr->get_args().insert( arg, new AlignofExpr( concrete->clone() ) );
	782	arg++;
[01aeade]	783	} else {
[ea5daeb]	784	// xxx - should this be an assertion?
[540de412]	785	throw SemanticError( "unbound type variable: " + tyParm->first + " in application ", appExpr );
[01aeade]	786	} // if
	787	} // if
	788	} // for
[7754cde]	789
	790	// add size/align for generic types to parameter list
[906e24d]	791	if ( ! appExpr->get_function()->has_result() ) return;
	792	FunctionType *funcType = getFunctionType( appExpr->get_function()->get_result() );
[7754cde]	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;
[ea5daeb]	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	}
[70a06f6]	804
[5c52b06]	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 );
[906e24d]	808	if ( ! fnArgBase ) continue; // xxx - previously had check for non-empty fnArgBase results
	809	passArgTypeVars( appExpr, (*fnParm)->get_type(), fnArgBase->get_result(), 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	// Create temporary to hold return value of polymorphic function and produce that temporary as a result
	821	// using a comma expression. Possibly change comma expression into statement expression "{}" for multiple
	822	// return values.
[d9fa60a]	823	assert( retType );
[cf16f94]	824	ObjectDecl *newObj = makeTemporary( retType->clone() );
	825	Expression *paramExpr = new VariableExpr( newObj );
[5c52b06]	826
	827	// If the type of the temporary is not polymorphic, box temporary by taking its address;
	828	// otherwise the temporary is already boxed and can be used directly.
[5f6c42c]	829	if ( ! isPolyType( newObj->get_type(), scopeTyVars, env ) ) {
[cf16f94]	830	paramExpr = new AddressExpr( paramExpr );
[01aeade]	831	} // if
[cf16f94]	832	arg = appExpr->get_args().insert( arg, paramExpr ); // add argument to function call
	833	arg++;
	834	// Build a comma expression to call the function and emulate a normal return.
	835	CommaExpr *commaExpr = new CommaExpr( appExpr, new VariableExpr( newObj ) );
	836	commaExpr->set_env( appExpr->get_env() );
	837	appExpr->set_env( 0 );
	838	return commaExpr;
[01aeade]	839	}
[6c3744e]	840
[48ca586]	841	void Pass1::replaceParametersWithConcrete( ApplicationExpr appExpr, std::list< Expression >& params ) {
	842	for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
	843	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
	844	assert(paramType && "Aggregate parameters should be type expressions");
	845	paramType->set_type( replaceWithConcrete( appExpr, paramType->get_type(), false ) );
	846	}
	847	}
[b4cd03b7]	848
[48ca586]	849	Type Pass1::replaceWithConcrete( ApplicationExpr appExpr, Type *type, bool doClone ) {
	850	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( type ) ) {
	851	Type *concrete = env->lookup( typeInst->get_name() );
	852	if ( concrete == 0 ) {
	853	throw SemanticError( "Unbound type variable " + typeInst->get_name() + " in ", appExpr );
	854	} // if
	855	return concrete;
	856	} else if ( StructInstType structType = dynamic_cast< StructInstType >( type ) ) {
	857	if ( doClone ) {
	858	structType = structType->clone();
	859	}
	860	replaceParametersWithConcrete( appExpr, structType->get_parameters() );
	861	return structType;
	862	} else if ( UnionInstType unionType = dynamic_cast< UnionInstType >( type ) ) {
	863	if ( doClone ) {
	864	unionType = unionType->clone();
	865	}
	866	replaceParametersWithConcrete( appExpr, unionType->get_parameters() );
	867	return unionType;
	868	}
	869	return type;
	870	}
	871
[d9fa60a]	872	Expression Pass1::addDynRetParam( ApplicationExpr appExpr, FunctionType function, Type dynType, std::list< Expression *>::iterator &arg ) {
[01aeade]	873	assert( env );
[3bb195cb]	874	Type *concrete = replaceWithConcrete( appExpr, dynType );
[70a06f6]	875	// add out-parameter for return value
[01aeade]	876	return addRetParam( appExpr, function, concrete, arg );
	877	}
[6c3744e]	878
[01aeade]	879	Expression Pass1::applyAdapter( ApplicationExpr appExpr, FunctionType function, std::list< Expression >::iterator &arg, const TyVarMap &tyVars ) {
	880	Expression *ret = appExpr;
[3bb195cb]	881	// if ( ! function->get_returnVals().empty() && isPolyType( function->get_returnVals().front()->get_type(), tyVars ) ) {
	882	if ( isDynRet( function, tyVars ) ) {
[01aeade]	883	ret = addRetParam( appExpr, function, function->get_returnVals().front()->get_type(), arg );
	884	} // if
[bdf1954]	885	std::string mangleName = mangleAdapterName( function, tyVars );
[01aeade]	886	std::string adapterName = makeAdapterName( mangleName );
[b1a6d6b]	887
[b4cd03b7]	888	// cast adaptee to void (*)(), since it may have any type inside a polymorphic function
	889	Type * adapteeType = new PointerType( Type::Qualifiers(), new FunctionType( Type::Qualifiers(), true ) );
	890	appExpr->get_args().push_front( new CastExpr( appExpr->get_function(), adapteeType ) );
[906e24d]	891	appExpr->set_function( new NameExpr( adapterName ) ); // xxx - result is never set on NameExpr
[ae63a18]	892
[01aeade]	893	return ret;
	894	}
[6c3744e]	895
[01aeade]	896	void Pass1::boxParam( Type param, Expression &arg, const TyVarMap &exprTyVars ) {
[906e24d]	897	assert( arg->has_result() );
[1cced28]	898	if ( isPolyType( param, exprTyVars ) ) {
[906e24d]	899	if ( isPolyType( arg->get_result() ) ) {
[9407ed8]	900	// if the argument's type is polymorphic, we don't need to box again!
[01aeade]	901	return;
[906e24d]	902	} else if ( arg->get_result()->get_isLvalue() ) {
[b3ab8f0]	903	// VariableExpr and MemberExpr are lvalues; need to check this isn't coming from the second arg of a comma expression though (not an lvalue)
[fea7ca7]	904	// xxx - need to test that this code is still reachable
[b3ab8f0]	905	if ( CommaExpr commaArg = dynamic_cast< CommaExpr >( arg ) ) {
[bc1ab61]	906	commaArg->set_arg2( new AddressExpr( commaArg->get_arg2() ) );
[b3ab8f0]	907	} else {
	908	arg = new AddressExpr( arg );
	909	}
[01aeade]	910	} else {
[bd85400]	911	// use type computed in unification to declare boxed variables
	912	Type * newType = param->clone();
	913	if ( env ) env->apply( newType );
	914	ObjectDecl *newObj = new ObjectDecl( tempNamer.newName(), DeclarationNode::NoStorageClass, LinkageSpec::C, 0, newType, 0 );
[f6d7e0f]	915	newObj->get_type()->get_qualifiers() = Type::Qualifiers(); // TODO: is this right???
[01aeade]	916	stmtsToAdd.push_back( new DeclStmt( noLabels, newObj ) );
	917	UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );
	918	assign->get_args().push_back( new VariableExpr( newObj ) );
	919	assign->get_args().push_back( arg );
	920	stmtsToAdd.push_back( new ExprStmt( noLabels, assign ) );
	921	arg = new AddressExpr( new VariableExpr( newObj ) );
	922	} // if
	923	} // if
	924	}
[6c3744e]	925
[b4cd03b7]	926	/// cast parameters to polymorphic functions so that types are replaced with
	927	/// void * if they are type parameters in the formal type.
	928	/// this gets rid of warnings from gcc.
[01aeade]	929	void addCast( Expression &actual, Type formal, const TyVarMap &tyVars ) {
[ea5daeb]	930	if ( getFunctionType( formal ) ) {
	931	Type * newType = formal->clone();
[b4cd03b7]	932	newType = ScrubTyVars::scrub( newType, tyVars );
[01aeade]	933	actual = new CastExpr( actual, newType );
	934	} // if
	935	}
[6c3744e]	936
[01aeade]	937	void Pass1::boxParams( ApplicationExpr appExpr, FunctionType function, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars ) {
	938	for ( std::list< DeclarationWithType *>::const_iterator param = function->get_parameters().begin(); param != function->get_parameters().end(); ++param, ++arg ) {
	939	assert( arg != appExpr->get_args().end() );
	940	addCast( arg, (param)->get_type(), exprTyVars );
	941	boxParam( (param)->get_type(), arg, exprTyVars );
	942	} // for
	943	}
[6c3744e]	944
[01aeade]	945	void Pass1::addInferredParams( ApplicationExpr appExpr, FunctionType functionType, std::list< Expression *>::iterator &arg, const TyVarMap &tyVars ) {
	946	std::list< Expression *>::iterator cur = arg;
[8c49c0e]	947	for ( Type::ForallList::iterator tyVar = functionType->get_forall().begin(); tyVar != functionType->get_forall().end(); ++tyVar ) {
[01aeade]	948	for ( std::list< DeclarationWithType >::iterator assert = (tyVar)->get_assertions().begin(); assert != (*tyVar)->get_assertions().end(); ++assert ) {
	949	InferredParams::const_iterator inferParam = appExpr->get_inferParams().find( (*assert)->get_uniqueId() );
[698664b3]	950	assert( inferParam != appExpr->get_inferParams().end() && "NOTE: Explicit casts of polymorphic functions to compatible monomorphic functions are currently unsupported" );
[01aeade]	951	Expression *newExpr = inferParam->second.expr->clone();
	952	addCast( newExpr, (*assert)->get_type(), tyVars );
	953	boxParam( (*assert)->get_type(), newExpr, tyVars );
	954	appExpr->get_args().insert( cur, newExpr );
	955	} // for
	956	} // for
	957	}
[6c3744e]	958
[01aeade]	959	void makeRetParm( FunctionType *funcType ) {
	960	DeclarationWithType *retParm = funcType->get_returnVals().front();
[6c3744e]	961
[01aeade]	962	// make a new parameter that is a pointer to the type of the old return value
	963	retParm->set_type( new PointerType( Type::Qualifiers(), retParm->get_type() ) );
	964	funcType->get_parameters().push_front( retParm );
[6c3744e]	965
[01aeade]	966	// we don't need the return value any more
	967	funcType->get_returnVals().clear();
	968	}
[6c3744e]	969
[01aeade]	970	FunctionType makeAdapterType( FunctionType adaptee, const TyVarMap &tyVars ) {
	971	// actually make the adapter type
	972	FunctionType *adapter = adaptee->clone();
[3bb195cb]	973	// if ( ! adapter->get_returnVals().empty() && isPolyType( adapter->get_returnVals().front()->get_type(), tyVars ) ) {
	974	if ( isDynRet( adapter, tyVars ) ) {
[01aeade]	975	makeRetParm( adapter );
	976	} // if
[68cd1ce]	977	adapter->get_parameters().push_front( new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new PointerType( Type::Qualifiers(), new FunctionType( Type::Qualifiers(), true ) ), 0 ) );
[01aeade]	978	return adapter;
	979	}
[6c3744e]	980
[01aeade]	981	Expression makeAdapterArg( DeclarationWithType param, DeclarationWithType arg, DeclarationWithType realParam, const TyVarMap &tyVars ) {
	982	assert( param );
	983	assert( arg );
[ffad73a]	984	if ( isPolyType( realParam->get_type(), tyVars ) ) {
[30aeb27]	985	if ( ! isPolyType( arg->get_type() ) ) {
[e56cfdb0]	986	UntypedExpr deref = new UntypedExpr( new NameExpr( "?" ) );
	987	deref->get_args().push_back( new CastExpr( new VariableExpr( param ), new PointerType( Type::Qualifiers(), arg->get_type()->clone() ) ) );
[906e24d]	988	deref->set_result( arg->get_type()->clone() );
[e56cfdb0]	989	return deref;
	990	} // if
[01aeade]	991	} // if
	992	return new VariableExpr( param );
	993	}
[6c3744e]	994
[01aeade]	995	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 ) {
	996	UniqueName paramNamer( "_p" );
	997	for ( ; param != paramEnd; ++param, ++arg, ++realParam ) {
	998	if ( (*param)->get_name() == "" ) {
	999	(*param)->set_name( paramNamer.newName() );
	1000	(*param)->set_linkage( LinkageSpec::C );
	1001	} // if
	1002	adapteeApp->get_args().push_back( makeAdapterArg( param, arg, *realParam, tyVars ) );
	1003	} // for
	1004	}
[6c3744e]	1005
[01aeade]	1006	FunctionDecl Pass1::makeAdapter( FunctionType adaptee, FunctionType *realType, const std::string &mangleName, const TyVarMap &tyVars ) {
	1007	FunctionType *adapterType = makeAdapterType( adaptee, tyVars );
	1008	adapterType = ScrubTyVars::scrub( adapterType, tyVars );
	1009	DeclarationWithType *adapteeDecl = adapterType->get_parameters().front();
	1010	adapteeDecl->set_name( "_adaptee" );
	1011	ApplicationExpr *adapteeApp = new ApplicationExpr( new CastExpr( new VariableExpr( adapteeDecl ), new PointerType( Type::Qualifiers(), realType ) ) );
	1012	Statement *bodyStmt;
[ae63a18]	1013
[8c49c0e]	1014	Type::ForallList::iterator tyArg = realType->get_forall().begin();
	1015	Type::ForallList::iterator tyParam = adapterType->get_forall().begin();
	1016	Type::ForallList::iterator realTyParam = adaptee->get_forall().begin();
[01aeade]	1017	for ( ; tyParam != adapterType->get_forall().end(); ++tyArg, ++tyParam, ++realTyParam ) {
	1018	assert( tyArg != realType->get_forall().end() );
	1019	std::list< DeclarationWithType >::iterator assertArg = (tyArg)->get_assertions().begin();
	1020	std::list< DeclarationWithType >::iterator assertParam = (tyParam)->get_assertions().begin();
	1021	std::list< DeclarationWithType >::iterator realAssertParam = (realTyParam)->get_assertions().begin();
	1022	for ( ; assertParam != (*tyParam)->get_assertions().end(); ++assertArg, ++assertParam, ++realAssertParam ) {
	1023	assert( assertArg != (*tyArg)->get_assertions().end() );
	1024	adapteeApp->get_args().push_back( makeAdapterArg( assertParam, assertArg, *realAssertParam, tyVars ) );
	1025	} // for
	1026	} // for
[ae63a18]	1027
[01aeade]	1028	std::list< DeclarationWithType *>::iterator arg = realType->get_parameters().begin();
	1029	std::list< DeclarationWithType *>::iterator param = adapterType->get_parameters().begin();
	1030	std::list< DeclarationWithType *>::iterator realParam = adaptee->get_parameters().begin();
[cc3528f]	1031	param++; // skip adaptee parameter in the adapter type
[01aeade]	1032	if ( realType->get_returnVals().empty() ) {
[cc3528f]	1033	// void return
[01aeade]	1034	addAdapterParams( adapteeApp, arg, param, adapterType->get_parameters().end(), realParam, tyVars );
	1035	bodyStmt = new ExprStmt( noLabels, adapteeApp );
[3bb195cb]	1036	// } else if ( isPolyType( adaptee->get_returnVals().front()->get_type(), tyVars ) ) {
	1037	} else if ( isDynType( adaptee->get_returnVals().front()->get_type(), tyVars ) ) {
[cc3528f]	1038	// return type T
[01aeade]	1039	if ( (*param)->get_name() == "" ) {
	1040	(*param)->set_name( "_ret" );
	1041	(*param)->set_linkage( LinkageSpec::C );
	1042	} // if
	1043	UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );
	1044	UntypedExpr deref = new UntypedExpr( new NameExpr( "?" ) );
	1045	deref->get_args().push_back( new CastExpr( new VariableExpr( *param++ ), new PointerType( Type::Qualifiers(), realType->get_returnVals().front()->get_type()->clone() ) ) );
	1046	assign->get_args().push_back( deref );
	1047	addAdapterParams( adapteeApp, arg, param, adapterType->get_parameters().end(), realParam, tyVars );
	1048	assign->get_args().push_back( adapteeApp );
	1049	bodyStmt = new ExprStmt( noLabels, assign );
	1050	} else {
	1051	// adapter for a function that returns a monomorphic value
	1052	addAdapterParams( adapteeApp, arg, param, adapterType->get_parameters().end(), realParam, tyVars );
	1053	bodyStmt = new ReturnStmt( noLabels, adapteeApp );
	1054	} // if
	1055	CompoundStmt *adapterBody = new CompoundStmt( noLabels );
	1056	adapterBody->get_kids().push_back( bodyStmt );
	1057	std::string adapterName = makeAdapterName( mangleName );
[de62360d]	1058	return new FunctionDecl( adapterName, DeclarationNode::NoStorageClass, LinkageSpec::C, adapterType, adapterBody, false, false );
[01aeade]	1059	}
[6c3744e]	1060
[c29d9ce]	1061	void Pass1::passAdapters( ApplicationExpr * appExpr, FunctionType * functionType, const TyVarMap & exprTyVars ) {
[e497c1d]	1062	// collect a list of function types passed as parameters or implicit parameters (assertions)
[01aeade]	1063	std::list< DeclarationWithType *> &paramList = functionType->get_parameters();
	1064	std::list< FunctionType *> functions;
[8c49c0e]	1065	for ( Type::ForallList::iterator tyVar = functionType->get_forall().begin(); tyVar != functionType->get_forall().end(); ++tyVar ) {
[01aeade]	1066	for ( std::list< DeclarationWithType >::iterator assert = (tyVar)->get_assertions().begin(); assert != (*tyVar)->get_assertions().end(); ++assert ) {
	1067	findFunction( (*assert)->get_type(), functions, exprTyVars, needsAdapter );
	1068	} // for
	1069	} // for
	1070	for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) {
	1071	findFunction( (*arg)->get_type(), functions, exprTyVars, needsAdapter );
	1072	} // for
[e497c1d]	1073
[e56cfdb0]	1074	// parameter function types for which an appropriate adapter has been generated. we cannot use the types
	1075	// after applying substitutions, since two different parameter types may be unified to the same type
[01aeade]	1076	std::set< std::string > adaptersDone;
[e497c1d]	1077
[01aeade]	1078	for ( std::list< FunctionType *>::iterator funType = functions.begin(); funType != functions.end(); ++funType ) {
[c29d9ce]	1079	FunctionType originalFunction = (funType)->clone();
[01aeade]	1080	FunctionType realFunction = (funType)->clone();
	1081	std::string mangleName = SymTab::Mangler::mangle( realFunction );
[e497c1d]	1082
[e56cfdb0]	1083	// only attempt to create an adapter or pass one as a parameter if we haven't already done so for this
	1084	// pre-substitution parameter function type.
[01aeade]	1085	if ( adaptersDone.find( mangleName ) == adaptersDone.end() ) {
[e497c1d]	1086	adaptersDone.insert( adaptersDone.begin(), mangleName );
[ae63a18]	1087
[e56cfdb0]	1088	// apply substitution to type variables to figure out what the adapter's type should look like
[e497c1d]	1089	assert( env );
	1090	env->apply( realFunction );
[ae63a18]	1091	mangleName = SymTab::Mangler::mangle( realFunction );
[bdf1954]	1092	mangleName += makePolyMonoSuffix( originalFunction, exprTyVars );
[e497c1d]	1093
[6635c74]	1094	typedef ScopedMap< std::string, DeclarationWithType* >::iterator AdapterIter;
	1095	AdapterIter adapter = adapters.find( mangleName );
[e56cfdb0]	1096	if ( adapter == adapters.end() ) {
	1097	// adapter has not been created yet in the current scope, so define it
	1098	FunctionDecl newAdapter = makeAdapter( funType, realFunction, mangleName, exprTyVars );
[6635c74]	1099	std::pair< AdapterIter, bool > answer = adapters.insert( std::pair< std::string, DeclarationWithType *>( mangleName, newAdapter ) );
	1100	adapter = answer.first;
[e56cfdb0]	1101	stmtsToAdd.push_back( new DeclStmt( noLabels, newAdapter ) );
[c29d9ce]	1102	} // if
[e56cfdb0]	1103	assert( adapter != adapters.end() );
	1104
	1105	// add the appropriate adapter as a parameter
	1106	appExpr->get_args().push_front( new VariableExpr( adapter->second ) );
[01aeade]	1107	} // if
	1108	} // for
[e56cfdb0]	1109	} // passAdapters
[6c3744e]	1110
[78dd0da]	1111	Expression makeIncrDecrExpr( ApplicationExpr appExpr, Type *polyType, bool isIncr ) {
[01aeade]	1112	NameExpr *opExpr;
	1113	if ( isIncr ) {
	1114	opExpr = new NameExpr( "?+=?" );
	1115	} else {
	1116	opExpr = new NameExpr( "?-=?" );
[6c3744e]	1117	} // if
[01aeade]	1118	UntypedExpr *addAssign = new UntypedExpr( opExpr );
	1119	if ( AddressExpr address = dynamic_cast< AddressExpr >( appExpr->get_args().front() ) ) {
	1120	addAssign->get_args().push_back( address->get_arg() );
	1121	} else {
	1122	addAssign->get_args().push_back( appExpr->get_args().front() );
[6c3744e]	1123	} // if
[adc6781]	1124	addAssign->get_args().push_back( new NameExpr( sizeofName( mangleType( polyType ) ) ) );
[906e24d]	1125	addAssign->set_result( appExpr->get_result()->clone() );
[01aeade]	1126	if ( appExpr->get_env() ) {
	1127	addAssign->set_env( appExpr->get_env() );
[6c3744e]	1128	appExpr->set_env( 0 );
	1129	} // if
[01aeade]	1130	appExpr->get_args().clear();
	1131	delete appExpr;
	1132	return addAssign;
	1133	}
	1134
	1135	Expression Pass1::handleIntrinsics( ApplicationExpr appExpr ) {
	1136	if ( VariableExpr varExpr = dynamic_cast< VariableExpr >( appExpr->get_function() ) ) {
	1137	if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic ) {
	1138	if ( varExpr->get_var()->get_name() == "?[?]" ) {
[906e24d]	1139	assert( appExpr->has_result() );
[01aeade]	1140	assert( appExpr->get_args().size() == 2 );
[906e24d]	1141	Type *baseType1 = isPolyPtr( appExpr->get_args().front()->get_result(), scopeTyVars, env );
	1142	Type *baseType2 = isPolyPtr( appExpr->get_args().back()->get_result(), scopeTyVars, env );
[ae63a18]	1143	assert( ! baseType1 \|\| ! baseType2 ); // the arguments cannot both be polymorphic pointers
[01aeade]	1144	UntypedExpr *ret = 0;
[ae63a18]	1145	if ( baseType1 \|\| baseType2 ) { // one of the arguments is a polymorphic pointer
[01aeade]	1146	ret = new UntypedExpr( new NameExpr( "?+?" ) );
	1147	} // if
[ffad73a]	1148	if ( baseType1 ) {
[01aeade]	1149	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1150	multiply->get_args().push_back( appExpr->get_args().back() );
[adc6781]	1151	multiply->get_args().push_back( new SizeofExpr( baseType1->clone() ) );
[01aeade]	1152	ret->get_args().push_back( appExpr->get_args().front() );
	1153	ret->get_args().push_back( multiply );
[ffad73a]	1154	} else if ( baseType2 ) {
[01aeade]	1155	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1156	multiply->get_args().push_back( appExpr->get_args().front() );
[adc6781]	1157	multiply->get_args().push_back( new SizeofExpr( baseType2->clone() ) );
[01aeade]	1158	ret->get_args().push_back( multiply );
	1159	ret->get_args().push_back( appExpr->get_args().back() );
	1160	} // if
[ffad73a]	1161	if ( baseType1 \|\| baseType2 ) {
[906e24d]	1162	ret->set_result( appExpr->get_result()->clone() );
[01aeade]	1163	if ( appExpr->get_env() ) {
	1164	ret->set_env( appExpr->get_env() );
	1165	appExpr->set_env( 0 );
	1166	} // if
	1167	appExpr->get_args().clear();
	1168	delete appExpr;
	1169	return ret;
	1170	} // if
	1171	} else if ( varExpr->get_var()->get_name() == "*?" ) {
[906e24d]	1172	assert( appExpr->has_result() );
[01aeade]	1173	assert( ! appExpr->get_args().empty() );
[906e24d]	1174	if ( isPolyType( appExpr->get_result(), scopeTyVars, env ) ) {
[01aeade]	1175	Expression *ret = appExpr->get_args().front();
[906e24d]	1176	delete ret->get_result();
	1177	ret->set_result( appExpr->get_result()->clone() );
[01aeade]	1178	if ( appExpr->get_env() ) {
	1179	ret->set_env( appExpr->get_env() );
	1180	appExpr->set_env( 0 );
	1181	} // if
	1182	appExpr->get_args().clear();
	1183	delete appExpr;
	1184	return ret;
	1185	} // if
	1186	} else if ( varExpr->get_var()->get_name() == "?++" \|\| varExpr->get_var()->get_name() == "?--" ) {
[906e24d]	1187	assert( appExpr->has_result() );
[01aeade]	1188	assert( appExpr->get_args().size() == 1 );
[906e24d]	1189	if ( Type *baseType = isPolyPtr( appExpr->get_result(), scopeTyVars, env ) ) {
	1190	Type *tempType = appExpr->get_result()->clone();
[01aeade]	1191	if ( env ) {
	1192	env->apply( tempType );
	1193	} // if
	1194	ObjectDecl *newObj = makeTemporary( tempType );
	1195	VariableExpr *tempExpr = new VariableExpr( newObj );
	1196	UntypedExpr *assignExpr = new UntypedExpr( new NameExpr( "?=?" ) );
	1197	assignExpr->get_args().push_back( tempExpr->clone() );
	1198	if ( AddressExpr address = dynamic_cast< AddressExpr >( appExpr->get_args().front() ) ) {
	1199	assignExpr->get_args().push_back( address->get_arg()->clone() );
	1200	} else {
	1201	assignExpr->get_args().push_back( appExpr->get_args().front()->clone() );
	1202	} // if
[ffad73a]	1203	CommaExpr *firstComma = new CommaExpr( assignExpr, makeIncrDecrExpr( appExpr, baseType, varExpr->get_var()->get_name() == "?++" ) );
[01aeade]	1204	return new CommaExpr( firstComma, tempExpr );
	1205	} // if
	1206	} else if ( varExpr->get_var()->get_name() == "++?" \|\| varExpr->get_var()->get_name() == "--?" ) {
[906e24d]	1207	assert( appExpr->has_result() );
[01aeade]	1208	assert( appExpr->get_args().size() == 1 );
[906e24d]	1209	if ( Type *baseType = isPolyPtr( appExpr->get_result(), scopeTyVars, env ) ) {
[ffad73a]	1210	return makeIncrDecrExpr( appExpr, baseType, varExpr->get_var()->get_name() == "++?" );
[01aeade]	1211	} // if
	1212	} else if ( varExpr->get_var()->get_name() == "?+?" \|\| varExpr->get_var()->get_name() == "?-?" ) {
[906e24d]	1213	assert( appExpr->has_result() );
[01aeade]	1214	assert( appExpr->get_args().size() == 2 );
[906e24d]	1215	Type *baseType1 = isPolyPtr( appExpr->get_args().front()->get_result(), scopeTyVars, env );
	1216	Type *baseType2 = isPolyPtr( appExpr->get_args().back()->get_result(), scopeTyVars, env );
[ffad73a]	1217	if ( baseType1 && baseType2 ) {
[01aeade]	1218	UntypedExpr *divide = new UntypedExpr( new NameExpr( "?/?" ) );
	1219	divide->get_args().push_back( appExpr );
[adc6781]	1220	divide->get_args().push_back( new SizeofExpr( baseType1->clone() ) );
[906e24d]	1221	divide->set_result( appExpr->get_result()->clone() );
[01aeade]	1222	if ( appExpr->get_env() ) {
	1223	divide->set_env( appExpr->get_env() );
	1224	appExpr->set_env( 0 );
	1225	} // if
	1226	return divide;
[ffad73a]	1227	} else if ( baseType1 ) {
[01aeade]	1228	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1229	multiply->get_args().push_back( appExpr->get_args().back() );
[adc6781]	1230	multiply->get_args().push_back( new SizeofExpr( baseType1->clone() ) );
[01aeade]	1231	appExpr->get_args().back() = multiply;
[ffad73a]	1232	} else if ( baseType2 ) {
[01aeade]	1233	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1234	multiply->get_args().push_back( appExpr->get_args().front() );
[adc6781]	1235	multiply->get_args().push_back( new SizeofExpr( baseType2->clone() ) );
[01aeade]	1236	appExpr->get_args().front() = multiply;
	1237	} // if
	1238	} else if ( varExpr->get_var()->get_name() == "?+=?" \|\| varExpr->get_var()->get_name() == "?-=?" ) {
[906e24d]	1239	assert( appExpr->has_result() );
[01aeade]	1240	assert( appExpr->get_args().size() == 2 );
[906e24d]	1241	Type *baseType = isPolyPtr( appExpr->get_result(), scopeTyVars, env );
[ffad73a]	1242	if ( baseType ) {
[01aeade]	1243	UntypedExpr multiply = new UntypedExpr( new NameExpr( "??" ) );
	1244	multiply->get_args().push_back( appExpr->get_args().back() );
[adc6781]	1245	multiply->get_args().push_back( new SizeofExpr( baseType->clone() ) );
[01aeade]	1246	appExpr->get_args().back() = multiply;
	1247	} // if
	1248	} // if
	1249	return appExpr;
	1250	} // if
[6c3744e]	1251	} // if
[01aeade]	1252	return 0;
	1253	}
[6c3744e]	1254
[01aeade]	1255	Expression Pass1::mutate( ApplicationExpr appExpr ) {
[e56cfdb0]	1256	// std::cerr << "mutate appExpr: ";
	1257	// for ( TyVarMap::iterator i = scopeTyVars.begin(); i != scopeTyVars.end(); ++i ) {
	1258	// std::cerr << i->first << " ";
	1259	// }
	1260	// std::cerr << "\n";
[01aeade]	1261	bool oldUseRetval = useRetval;
	1262	useRetval = false;
	1263	appExpr->get_function()->acceptMutator( *this );
	1264	mutateAll( appExpr->get_args(), *this );
	1265	useRetval = oldUseRetval;
[ae63a18]	1266
[906e24d]	1267	assert( appExpr->get_function()->has_result() );
	1268	PointerType pointer = safe_dynamic_cast< PointerType >( appExpr->get_function()->get_result() );
	1269	FunctionType function = safe_dynamic_cast< FunctionType >( pointer->get_base() );
[ae63a18]	1270
[01aeade]	1271	if ( Expression *newExpr = handleIntrinsics( appExpr ) ) {
	1272	return newExpr;
	1273	} // if
[ae63a18]	1274
[01aeade]	1275	Expression *ret = appExpr;
[ae63a18]	1276
[01aeade]	1277	std::list< Expression *>::iterator arg = appExpr->get_args().begin();
	1278	std::list< Expression *>::iterator paramBegin = appExpr->get_args().begin();
[ae63a18]	1279
[2c57025]	1280	TyVarMap exprTyVars( TypeDecl::Data{} );
[5c52b06]	1281	makeTyVarMap( function, exprTyVars );
[3bb195cb]	1282	ReferenceToType *dynRetType = isDynRet( function, exprTyVars );
[d9fa60a]	1283	Type *concRetType = appExpr->get_result();// ?: dynRetType; // xxx - is concRetType a good name?
[5c52b06]	1284
[3bb195cb]	1285	if ( dynRetType ) {
[33a7b6d]	1286	ret = addDynRetParam( appExpr, function, concRetType, arg ); // xxx - used to use dynRetType instead of concRetType
[01aeade]	1287	} else if ( needsAdapter( function, scopeTyVars ) ) {
[e56cfdb0]	1288	// std::cerr << "needs adapter: ";
[2e3a379]	1289	// printTyVarMap( std::cerr, scopeTyVars );
	1290	// std::cerr << *env << std::endl;
[01aeade]	1291	// change the application so it calls the adapter rather than the passed function
	1292	ret = applyAdapter( appExpr, function, arg, scopeTyVars );
	1293	} // if
	1294	arg = appExpr->get_args().begin();
[ae63a18]	1295
[33a7b6d]	1296	passTypeVars( appExpr, concRetType, arg, exprTyVars ); // xxx - used to use dynRetType instead of concRetType
[01aeade]	1297	addInferredParams( appExpr, function, arg, exprTyVars );
[51b73452]	1298
[01aeade]	1299	arg = paramBegin;
[ae63a18]	1300
[01aeade]	1301	boxParams( appExpr, function, arg, exprTyVars );
	1302	passAdapters( appExpr, function, exprTyVars );
[6c3744e]	1303
[01aeade]	1304	return ret;
	1305	}
[6c3744e]	1306
[01aeade]	1307	Expression Pass1::mutate( UntypedExpr expr ) {
[906e24d]	1308	if ( expr->has_result() && isPolyType( expr->get_result(), scopeTyVars, env ) ) {
[01aeade]	1309	if ( NameExpr name = dynamic_cast< NameExpr >( expr->get_function() ) ) {
	1310	if ( name->get_name() == "*?" ) {
	1311	Expression *ret = expr->get_args().front();
	1312	expr->get_args().clear();
	1313	delete expr;
	1314	return ret->acceptMutator( *this );
	1315	} // if
	1316	} // if
	1317	} // if
	1318	return PolyMutator::mutate( expr );
	1319	}
[6c3744e]	1320
[01aeade]	1321	Expression Pass1::mutate( AddressExpr addrExpr ) {
[906e24d]	1322	assert( addrExpr->get_arg()->has_result() && ! addrExpr->get_arg()->get_result()->isVoid() );
[cf16f94]	1323
	1324	bool needs = false;
	1325	if ( UntypedExpr expr = dynamic_cast< UntypedExpr >( addrExpr->get_arg() ) ) {
[906e24d]	1326	if ( expr->has_result() && isPolyType( expr->get_result(), scopeTyVars, env ) ) {
[cf16f94]	1327	if ( NameExpr name = dynamic_cast< NameExpr >( expr->get_function() ) ) {
	1328	if ( name->get_name() == "*?" ) {
	1329	if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr->get_args().front() ) ) {
[906e24d]	1330	assert( appExpr->get_function()->has_result() );
	1331	PointerType pointer = safe_dynamic_cast< PointerType >( appExpr->get_function()->get_result() );
	1332	FunctionType function = safe_dynamic_cast< FunctionType >( pointer->get_base() );
[cf16f94]	1333	needs = needsAdapter( function, scopeTyVars );
	1334	} // if
	1335	} // if
	1336	} // if
	1337	} // if
	1338	} // if
[fea7ca7]	1339	// isPolyType check needs to happen before mutating addrExpr arg, so pull it forward
	1340	// out of the if condition.
[906e24d]	1341	bool polytype = isPolyType( addrExpr->get_arg()->get_result(), scopeTyVars, env );
[01aeade]	1342	addrExpr->set_arg( mutateExpression( addrExpr->get_arg() ) );
[fea7ca7]	1343	if ( polytype \|\| needs ) {
[01aeade]	1344	Expression *ret = addrExpr->get_arg();
[906e24d]	1345	delete ret->get_result();
	1346	ret->set_result( addrExpr->get_result()->clone() );
[01aeade]	1347	addrExpr->set_arg( 0 );
	1348	delete addrExpr;
	1349	return ret;
	1350	} else {
	1351	return addrExpr;
	1352	} // if
	1353	}
[6c3744e]	1354
[b10c9959]	1355	/// Wraps a function declaration in a new pointer-to-function variable expression
	1356	VariableExpr wrapFunctionDecl( DeclarationWithType functionDecl ) {
	1357	// line below cloned from FixFunction.cc
[9799ec8]	1358	// xxx - functionObj is never added to a list of declarations...
[33a7b6d]	1359	// alternatively, this function could return a new VariableExpr( functionDecl ) and change the result type of the new expression
[b10c9959]	1360	ObjectDecl *functionObj = new ObjectDecl( functionDecl->get_name(), functionDecl->get_storageClass(), functionDecl->get_linkage(), 0,
	1361	new PointerType( Type::Qualifiers(), functionDecl->get_type()->clone() ), 0 );
	1362	functionObj->set_mangleName( functionDecl->get_mangleName() );
[9799ec8]	1363	functionObj->set_scopeLevel( functionDecl->get_scopeLevel() );
[b10c9959]	1364	return new VariableExpr( functionObj );
	1365	}
[70a06f6]	1366
[c2ad3c9]	1367	/// Finds the operation declaration for a given type in one of the two maps
	1368	DeclarationWithType* findOpForType( Type formalType, const ScopedMap< std::string, DeclarationWithType >& ops, ResolvExpr::TypeMap< DeclarationWithType >& scopedOps ) {
	1369	if ( TypeInstType formalTypeInstType = dynamic_cast< TypeInstType >( formalType ) ) {
	1370	ScopedMap< std::string, DeclarationWithType *>::const_iterator opIt = ops.find( formalTypeInstType->get_name() );
	1371	return opIt == ops.end() ? 0 : opIt->second;
	1372	} else {
	1373	return scopedOps.find( formalType );
	1374	}
	1375	}
	1376
	1377	/// Adds an assertion parameter to the application expression for the actual assertion declaration valued with the assert op
	1378	void addAssertionFor( ApplicationExpr appExpr, DeclarationWithType actualDecl, DeclarationWithType *assertOp ) {
	1379	appExpr->get_inferParams()[ actualDecl->get_uniqueId() ]
	1380	= ParamEntry( assertOp->get_uniqueId(), assertOp->get_type()->clone(), actualDecl->get_type()->clone(), wrapFunctionDecl( assertOp ) );
	1381	}
[9799ec8]	1382
[cf16f94]	1383	Statement * Pass1::mutate( ReturnStmt *returnStmt ) {
	1384	if ( retval && returnStmt->get_expr() ) {
[906e24d]	1385	assert( returnStmt->get_expr()->has_result() && ! returnStmt->get_expr()->get_result()->isVoid() );
[cf16f94]	1386	// *** Code Removal *** After introducing a temporary variable for all return expressions, the following code appears superfluous.
	1387	// if ( returnStmt->get_expr()->get_results().front()->get_isLvalue() ) {
[ae63a18]	1388	// by this point, a cast expr on a polymorphic return value is redundant
[cf16f94]	1389	while ( CastExpr castExpr = dynamic_cast< CastExpr >( returnStmt->get_expr() ) ) {
	1390	returnStmt->set_expr( castExpr->get_arg() );
	1391	returnStmt->get_expr()->set_env( castExpr->get_env() );
	1392	castExpr->set_env( 0 );
	1393	castExpr->set_arg( 0 );
	1394	delete castExpr;
[5f6c42c]	1395	} //while
[1194734]	1396
	1397	// find assignment operator for (polymorphic) return type
[b10c9959]	1398	ApplicationExpr *assignExpr = 0;
[1194734]	1399	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( retval->get_type() ) ) {
[b10c9959]	1400	// find assignment operator for type variable
[63c0dbf]	1401	ScopedMap< std::string, DeclarationWithType *>::const_iterator assignIter = assignOps.find( typeInst->get_name() );
[1194734]	1402	if ( assignIter == assignOps.end() ) {
	1403	throw SemanticError( "Attempt to return dtype or ftype object in ", returnStmt->get_expr() );
	1404	} // if
[b10c9959]	1405	assignExpr = new ApplicationExpr( new VariableExpr( assignIter->second ) );
[1194734]	1406	} else if ( ReferenceToType refType = dynamic_cast< ReferenceToType >( retval->get_type() ) ) {
[b10c9959]	1407	// find assignment operator for generic type
[dc12481]	1408	DeclarationWithType *functionDecl = scopedAssignOps.find( refType );
	1409	if ( ! functionDecl ) {
[1194734]	1410	throw SemanticError( "Attempt to return dtype or ftype generic object in ", returnStmt->get_expr() );
	1411	}
[b10c9959]	1412
	1413	// wrap it up in an application expression
	1414	assignExpr = new ApplicationExpr( wrapFunctionDecl( functionDecl ) );
	1415	assignExpr->set_env( env->clone() );
	1416
	1417	// find each of its needed secondary assignment operators
	1418	std::list< Expression* > &tyParams = refType->get_parameters();
[8c49c0e]	1419	Type::ForallList &forallParams = functionDecl->get_type()->get_forall();
[b10c9959]	1420	std::list< Expression* >::const_iterator tyIt = tyParams.begin();
[8c49c0e]	1421	Type::ForallList::const_iterator forallIt = forallParams.begin();
[b10c9959]	1422	for ( ; tyIt != tyParams.end() && forallIt != forallParams.end(); ++tyIt, ++forallIt ) {
[ae7014e]	1423	// Add appropriate mapping to assignment expression environment
[b10c9959]	1424	TypeExpr formalTypeExpr = dynamic_cast< TypeExpr >( *tyIt );
	1425	assert( formalTypeExpr && "type parameters must be type expressions" );
	1426	Type *formalType = formalTypeExpr->get_type();
[ae7014e]	1427	assignExpr->get_env()->add( (*forallIt)->get_name(), formalType );
	1428
[c2ad3c9]	1429	// skip non-otype parameters (ftype/dtype)
[2c57025]	1430	// xxx - should this check whether the type is complete instead?
[ae7014e]	1431	if ( (*forallIt)->get_kind() != TypeDecl::Any ) continue;
	1432
[c2ad3c9]	1433	// find otype operators for formal type
	1434	DeclarationWithType *assertAssign = findOpForType( formalType, assignOps, scopedAssignOps );
	1435	if ( ! assertAssign ) throw SemanticError( "No assignment operation found for ", formalType );
	1436
	1437	DeclarationWithType *assertCtor = findOpForType( formalType, ctorOps, scopedCtorOps );
	1438	if ( ! assertCtor ) throw SemanticError( "No default constructor found for ", formalType );
[b10c9959]	1439
[c2ad3c9]	1440	DeclarationWithType *assertCopy = findOpForType( formalType, copyOps, scopedCopyOps );
	1441	if ( ! assertCopy ) throw SemanticError( "No copy constructor found for ", formalType );
	1442
	1443	DeclarationWithType *assertDtor = findOpForType( formalType, dtorOps, scopedDtorOps );
	1444	if ( ! assertDtor ) throw SemanticError( "No destructor found for ", formalType );
[9799ec8]	1445
[c2ad3c9]	1446	// add inferred parameters for otype operators to assignment expression
	1447	// NOTE: Code here assumes that first four assertions are assign op, ctor, copy ctor, dtor, in that order
[ae7014e]	1448	std::list< DeclarationWithType* > &asserts = (*forallIt)->get_assertions();
[c2ad3c9]	1449	assert( asserts.size() >= 4 && "Type param needs otype operator assertions" );
	1450
	1451	std::list< DeclarationWithType* >::iterator actualIt = asserts.begin();
	1452	addAssertionFor( assignExpr, *actualIt, assertAssign );
	1453	++actualIt;
	1454	addAssertionFor( assignExpr, *actualIt, assertCtor );
	1455	++actualIt;
	1456	addAssertionFor( assignExpr, *actualIt, assertCopy );
	1457	++actualIt;
	1458	addAssertionFor( assignExpr, *actualIt, assertDtor );
[9799ec8]	1459
[b10c9959]	1460	}
[1194734]	1461	}
[b10c9959]	1462	assert( assignExpr );
[1194734]	1463
	1464	// replace return statement with appropriate assignment to out parameter
[cf16f94]	1465	Expression *retParm = new NameExpr( retval->get_name() );
[906e24d]	1466	retParm->set_result( new PointerType( Type::Qualifiers(), retval->get_type()->clone() ) );
[cf16f94]	1467	assignExpr->get_args().push_back( retParm );
	1468	assignExpr->get_args().push_back( returnStmt->get_expr() );
	1469	stmtsToAdd.push_back( new ExprStmt( noLabels, mutateExpression( assignExpr ) ) );
	1470	// } else {
	1471	// useRetval = true;
	1472	// stmtsToAdd.push_back( new ExprStmt( noLabels, mutateExpression( returnStmt->get_expr() ) ) );
	1473	// useRetval = false;
	1474	// } // if
	1475	returnStmt->set_expr( 0 );
[01aeade]	1476	} else {
[cf16f94]	1477	returnStmt->set_expr( mutateExpression( returnStmt->get_expr() ) );
[01aeade]	1478	} // if
[cf16f94]	1479	return returnStmt;
[01aeade]	1480	}
[6c3744e]	1481
[01aeade]	1482	Type * Pass1::mutate( PointerType *pointerType ) {
[6f49cdf]	1483	scopeTyVars.beginScope();
[01aeade]	1484	makeTyVarMap( pointerType, scopeTyVars );
[ae63a18]	1485
[01aeade]	1486	Type *ret = Mutator::mutate( pointerType );
[ae63a18]	1487
[6f49cdf]	1488	scopeTyVars.endScope();
[01aeade]	1489	return ret;
	1490	}
[6c3744e]	1491
[01aeade]	1492	Type * Pass1::mutate( FunctionType *functionType ) {
[6f49cdf]	1493	scopeTyVars.beginScope();
[01aeade]	1494	makeTyVarMap( functionType, scopeTyVars );
[ae63a18]	1495
[01aeade]	1496	Type *ret = Mutator::mutate( functionType );
[ae63a18]	1497
[6f49cdf]	1498	scopeTyVars.endScope();
[01aeade]	1499	return ret;
	1500	}
[51b73452]	1501
[01aeade]	1502	void Pass1::doBeginScope() {
[6635c74]	1503	adapters.beginScope();
[1194734]	1504	scopedAssignOps.beginScope();
[c2ad3c9]	1505	scopedCtorOps.beginScope();
	1506	scopedCopyOps.beginScope();
	1507	scopedDtorOps.beginScope();
[01aeade]	1508	}
[b1a6d6b]	1509
[01aeade]	1510	void Pass1::doEndScope() {
[6635c74]	1511	adapters.endScope();
[1194734]	1512	scopedAssignOps.endScope();
[c2ad3c9]	1513	scopedCtorOps.endScope();
	1514	scopedCopyOps.endScope();
	1515	scopedDtorOps.endScope();
[01aeade]	1516	}
[51b73452]	1517
	1518	////////////////////////////////////////// Pass2 ////////////////////////////////////////////////////
	1519
[01aeade]	1520	void Pass2::addAdapters( FunctionType *functionType ) {
	1521	std::list< DeclarationWithType *> &paramList = functionType->get_parameters();
	1522	std::list< FunctionType *> functions;
	1523	for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) {
	1524	Type orig = (arg)->get_type();
	1525	findAndReplaceFunction( orig, functions, scopeTyVars, needsAdapter );
	1526	(*arg)->set_type( orig );
	1527	}
	1528	std::set< std::string > adaptersDone;
	1529	for ( std::list< FunctionType *>::iterator funType = functions.begin(); funType != functions.end(); ++funType ) {
[bdf1954]	1530	std::string mangleName = mangleAdapterName( *funType, scopeTyVars );
[01aeade]	1531	if ( adaptersDone.find( mangleName ) == adaptersDone.end() ) {
	1532	std::string adapterName = makeAdapterName( mangleName );
[68cd1ce]	1533	paramList.push_front( new ObjectDecl( adapterName, DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new PointerType( Type::Qualifiers(), makeAdapterType( *funType, scopeTyVars ) ), 0 ) );
[01aeade]	1534	adaptersDone.insert( adaptersDone.begin(), mangleName );
	1535	}
	1536	}
[5f6c42c]	1537	// deleteAll( functions );
[01aeade]	1538	}
[6c3744e]	1539
[01aeade]	1540	template< typename DeclClass >
	1541	DeclClass * Pass2::handleDecl( DeclClass decl, Type type ) {
	1542	DeclClass ret = static_cast< DeclClass >( Mutator::mutate( decl ) );
[6c3744e]	1543
[01aeade]	1544	return ret;
	1545	}
[6c3744e]	1546
[01aeade]	1547	DeclarationWithType * Pass2::mutate( FunctionDecl *functionDecl ) {
	1548	return handleDecl( functionDecl, functionDecl->get_functionType() );
	1549	}
[6c3744e]	1550
[01aeade]	1551	ObjectDecl * Pass2::mutate( ObjectDecl *objectDecl ) {
	1552	return handleDecl( objectDecl, objectDecl->get_type() );
	1553	}
[6c3744e]	1554
[01aeade]	1555	TypeDecl * Pass2::mutate( TypeDecl *typeDecl ) {
[2c57025]	1556	addToTyVarMap( typeDecl, scopeTyVars );
[01aeade]	1557	if ( typeDecl->get_base() ) {
	1558	return handleDecl( typeDecl, typeDecl->get_base() );
	1559	} else {
	1560	return Mutator::mutate( typeDecl );
	1561	}
	1562	}
[6c3744e]	1563
[01aeade]	1564	TypedefDecl * Pass2::mutate( TypedefDecl *typedefDecl ) {
	1565	return handleDecl( typedefDecl, typedefDecl->get_base() );
	1566	}
[6c3744e]	1567
[01aeade]	1568	Type * Pass2::mutate( PointerType *pointerType ) {
[6f49cdf]	1569	scopeTyVars.beginScope();
[01aeade]	1570	makeTyVarMap( pointerType, scopeTyVars );
[ae63a18]	1571
[01aeade]	1572	Type *ret = Mutator::mutate( pointerType );
[ae63a18]	1573
[6f49cdf]	1574	scopeTyVars.endScope();
[01aeade]	1575	return ret;
	1576	}
[6c3744e]	1577
[01aeade]	1578	Type Pass2::mutate( FunctionType funcType ) {
[6f49cdf]	1579	scopeTyVars.beginScope();
[01aeade]	1580	makeTyVarMap( funcType, scopeTyVars );
[7754cde]	1581
	1582	// move polymorphic return type to parameter list
[3bb195cb]	1583	if ( isDynRet( funcType ) ) {
[d9fa60a]	1584	ObjectDecl ret = safe_dynamic_cast< ObjectDecl >( funcType->get_returnVals().front() );
[01aeade]	1585	ret->set_type( new PointerType( Type::Qualifiers(), ret->get_type() ) );
	1586	funcType->get_parameters().push_front( ret );
	1587	funcType->get_returnVals().pop_front();
[d9fa60a]	1588	ret->set_init( nullptr ); // xxx - memory leak?
[01aeade]	1589	}
[7754cde]	1590
	1591	// add size/align and assertions for type parameters to parameter list
[01aeade]	1592	std::list< DeclarationWithType *>::iterator last = funcType->get_parameters().begin();
	1593	std::list< DeclarationWithType *> inferredParams;
[78dd0da]	1594	ObjectDecl newObj( "", DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), 0 );
[05d47278]	1595	ObjectDecl newPtr( "", DeclarationNode::NoStorageClass, LinkageSpec::C, 0,
	1596	new PointerType( Type::Qualifiers(), new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ) ), 0 );
[8c49c0e]	1597	for ( Type::ForallList::const_iterator tyParm = funcType->get_forall().begin(); tyParm != funcType->get_forall().end(); ++tyParm ) {
[db0b3ce]	1598	ObjectDecl sizeParm, alignParm;
	1599	// add all size and alignment parameters to parameter list
[2c57025]	1600	if ( (*tyParm)->isComplete() ) {
[78dd0da]	1601	TypeInstType parmType( Type::Qualifiers(), (tyParm)->get_name(), tyParm );
[adc6781]	1602	std::string parmName = mangleType( &parmType );
[ae63a18]	1603
[78dd0da]	1604	sizeParm = newObj.clone();
[adc6781]	1605	sizeParm->set_name( sizeofName( parmName ) );
[db0b3ce]	1606	last = funcType->get_parameters().insert( last, sizeParm );
	1607	++last;
[78dd0da]	1608
	1609	alignParm = newObj.clone();
[adc6781]	1610	alignParm->set_name( alignofName( parmName ) );
[db0b3ce]	1611	last = funcType->get_parameters().insert( last, alignParm );
[01aeade]	1612	++last;
	1613	}
[e56cfdb0]	1614	// move all assertions into parameter list
[01aeade]	1615	for ( std::list< DeclarationWithType >::iterator assert = (tyParm)->get_assertions().begin(); assert != (*tyParm)->get_assertions().end(); ++assert ) {
[f8b961b]	1616	// assert = (assert)->acceptMutator( *this );
[01aeade]	1617	inferredParams.push_back( *assert );
	1618	}
	1619	(*tyParm)->get_assertions().clear();
	1620	}
[7754cde]	1621
[5c52b06]	1622	// add size/align for generic parameter types to parameter list
[b18b0b5]	1623	std::set< std::string > seenTypes; // sizeofName for generic types we've seen
[7754cde]	1624	for ( std::list< DeclarationWithType* >::const_iterator fnParm = last; fnParm != funcType->get_parameters().end(); ++fnParm ) {
[4b8f918]	1625	Type polyType = isPolyType( (fnParm)->get_type(), scopeTyVars );
	1626	if ( polyType && ! dynamic_cast< TypeInstType* >( polyType ) ) {
	1627	std::string typeName = mangleType( polyType );
[adc6781]	1628	if ( seenTypes.count( typeName ) ) continue;
[ae63a18]	1629
[05d47278]	1630	ObjectDecl sizeParm, alignParm, *offsetParm;
[7754cde]	1631	sizeParm = newObj.clone();
[adc6781]	1632	sizeParm->set_name( sizeofName( typeName ) );
[7754cde]	1633	last = funcType->get_parameters().insert( last, sizeParm );
	1634	++last;
	1635
	1636	alignParm = newObj.clone();
[adc6781]	1637	alignParm->set_name( alignofName( typeName ) );
[7754cde]	1638	last = funcType->get_parameters().insert( last, alignParm );
	1639	++last;
	1640
[4b8f918]	1641	if ( StructInstType polyBaseStruct = dynamic_cast< StructInstType >( polyType ) ) {
[89173242]	1642	// NOTE zero-length arrays are illegal in C, so empty structs have no offset array
	1643	if ( ! polyBaseStruct->get_baseStruct()->get_members().empty() ) {
	1644	offsetParm = newPtr.clone();
[adc6781]	1645	offsetParm->set_name( offsetofName( typeName ) );
[89173242]	1646	last = funcType->get_parameters().insert( last, offsetParm );
	1647	++last;
	1648	}
[05d47278]	1649	}
	1650
[adc6781]	1651	seenTypes.insert( typeName );
[7754cde]	1652	}
	1653	}
	1654
	1655	// splice assertion parameters into parameter list
[01aeade]	1656	funcType->get_parameters().splice( last, inferredParams );
	1657	addAdapters( funcType );
	1658	mutateAll( funcType->get_returnVals(), *this );
	1659	mutateAll( funcType->get_parameters(), *this );
[ae63a18]	1660
[6f49cdf]	1661	scopeTyVars.endScope();
[01aeade]	1662	return funcType;
	1663	}
[51b73452]	1664
[4b8f918]	1665	////////////////////////////////////////// PolyGenericCalculator ////////////////////////////////////////////////////
[51b73452]	1666
[aa19ccf]	1667	void PolyGenericCalculator::beginTypeScope( Type *ty ) {
	1668	scopeTyVars.beginScope();
	1669	makeTyVarMap( ty, scopeTyVars );
	1670	}
	1671
	1672	void PolyGenericCalculator::endTypeScope() {
	1673	scopeTyVars.endScope();
	1674	}
[51b73452]	1675
[01aeade]	1676	template< typename DeclClass >
[8a34677]	1677	DeclClass * PolyGenericCalculator::handleDecl( DeclClass decl, Type type ) {
[aa19ccf]	1678	beginTypeScope( type );
[1ba88a0]	1679	// knownLayouts.beginScope();
	1680	// knownOffsets.beginScope();
[ae63a18]	1681
[1ba88a0]	1682	DeclClass ret = static_cast< DeclClass >( Parent::mutate( decl ) );
[6c3744e]	1683
[1ba88a0]	1684	// knownOffsets.endScope();
	1685	// knownLayouts.endScope();
[aa19ccf]	1686	endTypeScope();
[01aeade]	1687	return ret;
	1688	}
[6c3744e]	1689
[8a34677]	1690	ObjectDecl * PolyGenericCalculator::mutate( ObjectDecl *objectDecl ) {
[01aeade]	1691	return handleDecl( objectDecl, objectDecl->get_type() );
	1692	}
[6c3744e]	1693
[8a34677]	1694	DeclarationWithType * PolyGenericCalculator::mutate( FunctionDecl *functionDecl ) {
[1ba88a0]	1695	knownLayouts.beginScope();
	1696	knownOffsets.beginScope();
	1697
	1698	DeclarationWithType * decl = handleDecl( functionDecl, functionDecl->get_functionType() );
	1699	knownOffsets.endScope();
	1700	knownLayouts.endScope();
	1701	return decl;
[01aeade]	1702	}
[6c3744e]	1703
[8a34677]	1704	TypedefDecl * PolyGenericCalculator::mutate( TypedefDecl *typedefDecl ) {
[01aeade]	1705	return handleDecl( typedefDecl, typedefDecl->get_base() );
	1706	}
[6c3744e]	1707
[8a34677]	1708	TypeDecl * PolyGenericCalculator::mutate( TypeDecl *typeDecl ) {
[2c57025]	1709	addToTyVarMap( typeDecl, scopeTyVars );
[1ba88a0]	1710	return Parent::mutate( typeDecl );
[01aeade]	1711	}
[51b73452]	1712
[8a34677]	1713	Type * PolyGenericCalculator::mutate( PointerType *pointerType ) {
[aa19ccf]	1714	beginTypeScope( pointerType );
[ae63a18]	1715
[1ba88a0]	1716	Type *ret = Parent::mutate( pointerType );
[ae63a18]	1717
[aa19ccf]	1718	endTypeScope();
[01aeade]	1719	return ret;
	1720	}
[6c3744e]	1721
[8a34677]	1722	Type * PolyGenericCalculator::mutate( FunctionType *funcType ) {
[aa19ccf]	1723	beginTypeScope( funcType );
[ae63a18]	1724
[8a34677]	1725	// make sure that any type information passed into the function is accounted for
	1726	for ( std::list< DeclarationWithType* >::const_iterator fnParm = funcType->get_parameters().begin(); fnParm != funcType->get_parameters().end(); ++fnParm ) {
	1727	// condition here duplicates that in Pass2::mutate( FunctionType* )
[4b8f918]	1728	Type polyType = isPolyType( (fnParm)->get_type(), scopeTyVars );
	1729	if ( polyType && ! dynamic_cast< TypeInstType* >( polyType ) ) {
	1730	knownLayouts.insert( mangleType( polyType ) );
[8a34677]	1731	}
	1732	}
[70a06f6]	1733
[1ba88a0]	1734	Type *ret = Parent::mutate( funcType );
[ae63a18]	1735
[aa19ccf]	1736	endTypeScope();
[01aeade]	1737	return ret;
[6c3744e]	1738	}
[51b73452]	1739
[8a34677]	1740	Statement PolyGenericCalculator::mutate( DeclStmt declStmt ) {
[01aeade]	1741	if ( ObjectDecl objectDecl = dynamic_cast< ObjectDecl >( declStmt->get_decl() ) ) {
[8a34677]	1742	if ( findGeneric( objectDecl->get_type() ) ) {
[e01559c]	1743	// change initialization of a polymorphic value object
	1744	// to allocate storage with alloca
[ffad73a]	1745	Type *declType = objectDecl->get_type();
[01aeade]	1746	UntypedExpr *alloc = new UntypedExpr( new NameExpr( "__builtin_alloca" ) );
[adc6781]	1747	alloc->get_args().push_back( new NameExpr( sizeofName( mangleType( declType ) ) ) );
[e01559c]	1748
	1749	delete objectDecl->get_init();
	1750
	1751	std::list<Expression*> designators;
[974906e2]	1752	objectDecl->set_init( new SingleInit( alloc, designators, false ) ); // not constructed
[01aeade]	1753	}
	1754	}
[1ba88a0]	1755	return Parent::mutate( declStmt );
[01aeade]	1756	}
[05d47278]	1757
[2a4b088]	1758	/// Finds the member in the base list that matches the given declaration; returns its index, or -1 if not present
	1759	long findMember( DeclarationWithType memberDecl, std::list< Declaration > &baseDecls ) {
	1760	long i = 0;
	1761	for(std::list< Declaration* >::const_iterator decl = baseDecls.begin(); decl != baseDecls.end(); ++decl, ++i ) {
	1762	if ( memberDecl->get_name() != (*decl)->get_name() ) continue;
	1763
	1764	if ( DeclarationWithType declWithType = dynamic_cast< DeclarationWithType >( *decl ) ) {
[bed4d37c]	1765	if ( memberDecl->get_mangleName().empty() \|\| declWithType->get_mangleName().empty()
	1766	\|\| memberDecl->get_mangleName() == declWithType->get_mangleName() ) return i;
[2a4b088]	1767	else continue;
	1768	} else return i;
	1769	}
	1770	return -1;
	1771	}
	1772
	1773	/// Returns an index expression into the offset array for a type
	1774	Expression makeOffsetIndex( Type objectType, long i ) {
	1775	std::stringstream offset_namer;
	1776	offset_namer << i;
	1777	ConstantExpr *fieldIndex = new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), offset_namer.str() ) );
	1778	UntypedExpr *fieldOffset = new UntypedExpr( new NameExpr( "?[?]" ) );
[adc6781]	1779	fieldOffset->get_args().push_back( new NameExpr( offsetofName( mangleType( objectType ) ) ) );
[2a4b088]	1780	fieldOffset->get_args().push_back( fieldIndex );
	1781	return fieldOffset;
	1782	}
	1783
	1784	/// Returns an expression dereferenced n times
	1785	Expression makeDerefdVar( Expression derefdVar, long n ) {
	1786	for ( int i = 1; i < n; ++i ) {
	1787	UntypedExpr derefExpr = new UntypedExpr( new NameExpr( "?" ) );
	1788	derefExpr->get_args().push_back( derefdVar );
[10a7775]	1789	// xxx - should set results on derefExpr
[2a4b088]	1790	derefdVar = derefExpr;
	1791	}
	1792	return derefdVar;
	1793	}
[d63eeb0]	1794
[8a34677]	1795	Expression PolyGenericCalculator::mutate( MemberExpr memberExpr ) {
[05d47278]	1796	// mutate, exiting early if no longer MemberExpr
[1ba88a0]	1797	Expression *expr = Parent::mutate( memberExpr );
[05d47278]	1798	memberExpr = dynamic_cast< MemberExpr* >( expr );
	1799	if ( ! memberExpr ) return expr;
	1800
	1801	// get declaration for base struct, exiting early if not found
[8488c715]	1802	int varDepth;
	1803	VariableExpr *varExpr = getBaseVar( memberExpr->get_aggregate(), &varDepth );
[05d47278]	1804	if ( ! varExpr ) return memberExpr;
	1805	ObjectDecl objectDecl = dynamic_cast< ObjectDecl >( varExpr->get_var() );
	1806	if ( ! objectDecl ) return memberExpr;
	1807
	1808	// only mutate member expressions for polymorphic types
[8488c715]	1809	int tyDepth;
	1810	Type *objectType = hasPolyBase( objectDecl->get_type(), scopeTyVars, &tyDepth );
[05d47278]	1811	if ( ! objectType ) return memberExpr;
[8a34677]	1812	findGeneric( objectType ); // ensure layout for this type is available
[05d47278]	1813
[ea5daeb]	1814	// replace member expression with dynamically-computed layout expression
[4318107]	1815	Expression *newMemberExpr = 0;
[05d47278]	1816	if ( StructInstType structType = dynamic_cast< StructInstType >( objectType ) ) {
[2a4b088]	1817	// look up offset index
	1818	long i = findMember( memberExpr->get_member(), structType->get_baseStruct()->get_members() );
	1819	if ( i == -1 ) return memberExpr;
[05d47278]	1820
[2a4b088]	1821	// replace member expression with pointer to base plus offset
	1822	UntypedExpr *fieldLoc = new UntypedExpr( new NameExpr( "?+?" ) );
	1823	fieldLoc->get_args().push_back( makeDerefdVar( varExpr->clone(), varDepth ) );
	1824	fieldLoc->get_args().push_back( makeOffsetIndex( objectType, i ) );
[4318107]	1825	newMemberExpr = fieldLoc;
[98735ef]	1826	} else if ( dynamic_cast< UnionInstType* >( objectType ) ) {
[2a4b088]	1827	// union members are all at offset zero, so build appropriately-dereferenced variable
[4318107]	1828	newMemberExpr = makeDerefdVar( varExpr->clone(), varDepth );
[2a4b088]	1829	} else return memberExpr;
[4318107]	1830	assert( newMemberExpr );
	1831
[4067aa8]	1832	Type *memberType = memberExpr->get_member()->get_type();
	1833	if ( ! isPolyType( memberType, scopeTyVars ) ) {
	1834	// 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
	1835	CastExpr *ptrCastExpr = new CastExpr( newMemberExpr, new PointerType( Type::Qualifiers(), memberType->clone() ) );
[4318107]	1836	UntypedExpr derefExpr = new UntypedExpr( new NameExpr( "?" ) );
	1837	derefExpr->get_args().push_back( ptrCastExpr );
	1838	newMemberExpr = derefExpr;
	1839	}
	1840
	1841	delete memberExpr;
	1842	return newMemberExpr;
[2a4b088]	1843	}
[05d47278]	1844
[8a34677]	1845	ObjectDecl PolyGenericCalculator::makeVar( const std::string &name, Type type, Initializer *init ) {
	1846	ObjectDecl *newObj = new ObjectDecl( name, DeclarationNode::NoStorageClass, LinkageSpec::C, 0, type, init );
	1847	stmtsToAdd.push_back( new DeclStmt( noLabels, newObj ) );
	1848	return newObj;
	1849	}
	1850
	1851	void PolyGenericCalculator::addOtypeParamsToLayoutCall( UntypedExpr layoutCall, const std::list< Type > &otypeParams ) {
	1852	for ( std::list< Type* >::const_iterator param = otypeParams.begin(); param != otypeParams.end(); ++param ) {
	1853	if ( findGeneric( *param ) ) {
	1854	// push size/align vars for a generic parameter back
[adc6781]	1855	std::string paramName = mangleType( *param );
	1856	layoutCall->get_args().push_back( new NameExpr( sizeofName( paramName ) ) );
	1857	layoutCall->get_args().push_back( new NameExpr( alignofName( paramName ) ) );
[8a34677]	1858	} else {
	1859	layoutCall->get_args().push_back( new SizeofExpr( (*param)->clone() ) );
	1860	layoutCall->get_args().push_back( new AlignofExpr( (*param)->clone() ) );
	1861	}
	1862	}
	1863	}
	1864
	1865	/// returns true if any of the otype parameters have a dynamic layout and puts all otype parameters in the output list
	1866	bool findGenericParams( std::list< TypeDecl* > &baseParams, std::list< Expression* > &typeParams, std::list< Type* > &out ) {
	1867	bool hasDynamicLayout = false;
	1868
	1869	std::list< TypeDecl* >::const_iterator baseParam = baseParams.begin();
	1870	std::list< Expression* >::const_iterator typeParam = typeParams.begin();
	1871	for ( ; baseParam != baseParams.end() && typeParam != typeParams.end(); ++baseParam, ++typeParam ) {
	1872	// skip non-otype parameters
[2c57025]	1873	if ( ! (*baseParam)->isComplete() ) continue;
[8a34677]	1874	TypeExpr typeExpr = dynamic_cast< TypeExpr >( *typeParam );
	1875	assert( typeExpr && "all otype parameters should be type expressions" );
	1876
	1877	Type *type = typeExpr->get_type();
	1878	out.push_back( type );
	1879	if ( isPolyType( type ) ) hasDynamicLayout = true;
	1880	}
	1881	assert( baseParam == baseParams.end() && typeParam == typeParams.end() );
	1882
	1883	return hasDynamicLayout;
	1884	}
	1885
	1886	bool PolyGenericCalculator::findGeneric( Type *ty ) {
[c2ad3c9]	1887	ty = replaceTypeInst( ty, env );
[9799ec8]	1888
[8a34677]	1889	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( ty ) ) {
	1890	if ( scopeTyVars.find( typeInst->get_name() ) != scopeTyVars.end() ) {
	1891	// NOTE assumes here that getting put in the scopeTyVars included having the layout variables set
	1892	return true;
	1893	}
	1894	return false;
	1895	} else if ( StructInstType structTy = dynamic_cast< StructInstType >( ty ) ) {
	1896	// check if this type already has a layout generated for it
[adc6781]	1897	std::string typeName = mangleType( ty );
	1898	if ( knownLayouts.find( typeName ) != knownLayouts.end() ) return true;
[8a34677]	1899
	1900	// check if any of the type parameters have dynamic layout; if none do, this type is (or will be) monomorphized
	1901	std::list< Type* > otypeParams;
	1902	if ( ! findGenericParams( *structTy->get_baseParameters(), structTy->get_parameters(), otypeParams ) ) return false;
	1903
	1904	// insert local variables for layout and generate call to layout function
[adc6781]	1905	knownLayouts.insert( typeName ); // done early so as not to interfere with the later addition of parameters to the layout call
[8a34677]	1906	Type *layoutType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	1907
	1908	int n_members = structTy->get_baseStruct()->get_members().size();
	1909	if ( n_members == 0 ) {
	1910	// all empty structs have the same layout - size 1, align 1
[cc3528f]	1911	makeVar( sizeofName( typeName ), layoutType, new SingleInit( new ConstantExpr( Constant::from_ulong( (unsigned long)1 ) ) ) );
	1912	makeVar( alignofName( typeName ), layoutType->clone(), new SingleInit( new ConstantExpr( Constant::from_ulong( (unsigned long)1 ) ) ) );
[8a34677]	1913	// NOTE zero-length arrays are forbidden in C, so empty structs have no offsetof array
	1914	} else {
[adc6781]	1915	ObjectDecl *sizeVar = makeVar( sizeofName( typeName ), layoutType );
	1916	ObjectDecl *alignVar = makeVar( alignofName( typeName ), layoutType->clone() );
[cb4c607]	1917	ObjectDecl *offsetVar = makeVar( offsetofName( typeName ), new ArrayType( Type::Qualifiers(), layoutType->clone(), new ConstantExpr( Constant::from_int( n_members ) ), false, false ) );
[8a34677]	1918
	1919	// generate call to layout function
[adc6781]	1920	UntypedExpr *layoutCall = new UntypedExpr( new NameExpr( layoutofName( structTy->get_baseStruct() ) ) );
[8a34677]	1921	layoutCall->get_args().push_back( new AddressExpr( new VariableExpr( sizeVar ) ) );
	1922	layoutCall->get_args().push_back( new AddressExpr( new VariableExpr( alignVar ) ) );
	1923	layoutCall->get_args().push_back( new VariableExpr( offsetVar ) );
	1924	addOtypeParamsToLayoutCall( layoutCall, otypeParams );
	1925
	1926	stmtsToAdd.push_back( new ExprStmt( noLabels, layoutCall ) );
	1927	}
	1928
	1929	return true;
	1930	} else if ( UnionInstType unionTy = dynamic_cast< UnionInstType >( ty ) ) {
	1931	// check if this type already has a layout generated for it
[adc6781]	1932	std::string typeName = mangleType( ty );
	1933	if ( knownLayouts.find( typeName ) != knownLayouts.end() ) return true;
[8a34677]	1934
	1935	// check if any of the type parameters have dynamic layout; if none do, this type is (or will be) monomorphized
	1936	std::list< Type* > otypeParams;
	1937	if ( ! findGenericParams( *unionTy->get_baseParameters(), unionTy->get_parameters(), otypeParams ) ) return false;
	1938
	1939	// insert local variables for layout and generate call to layout function
[adc6781]	1940	knownLayouts.insert( typeName ); // done early so as not to interfere with the later addition of parameters to the layout call
[8a34677]	1941	Type *layoutType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	1942
[adc6781]	1943	ObjectDecl *sizeVar = makeVar( sizeofName( typeName ), layoutType );
	1944	ObjectDecl *alignVar = makeVar( alignofName( typeName ), layoutType->clone() );
[8a34677]	1945
	1946	// generate call to layout function
[adc6781]	1947	UntypedExpr *layoutCall = new UntypedExpr( new NameExpr( layoutofName( unionTy->get_baseUnion() ) ) );
[8a34677]	1948	layoutCall->get_args().push_back( new AddressExpr( new VariableExpr( sizeVar ) ) );
	1949	layoutCall->get_args().push_back( new AddressExpr( new VariableExpr( alignVar ) ) );
	1950	addOtypeParamsToLayoutCall( layoutCall, otypeParams );
	1951
	1952	stmtsToAdd.push_back( new ExprStmt( noLabels, layoutCall ) );
	1953
	1954	return true;
	1955	}
	1956
	1957	return false;
	1958	}
	1959
	1960	Expression PolyGenericCalculator::mutate( SizeofExpr sizeofExpr ) {
	1961	Type *ty = sizeofExpr->get_type();
	1962	if ( findGeneric( ty ) ) {
[adc6781]	1963	Expression *ret = new NameExpr( sizeofName( mangleType( ty ) ) );
[8a34677]	1964	delete sizeofExpr;
	1965	return ret;
	1966	}
	1967	return sizeofExpr;
	1968	}
	1969
	1970	Expression PolyGenericCalculator::mutate( AlignofExpr alignofExpr ) {
	1971	Type *ty = alignofExpr->get_type();
	1972	if ( findGeneric( ty ) ) {
[adc6781]	1973	Expression *ret = new NameExpr( alignofName( mangleType( ty ) ) );
[8a34677]	1974	delete alignofExpr;
	1975	return ret;
	1976	}
	1977	return alignofExpr;
	1978	}
	1979
	1980	Expression PolyGenericCalculator::mutate( OffsetofExpr offsetofExpr ) {
[2a4b088]	1981	// mutate, exiting early if no longer OffsetofExpr
[1ba88a0]	1982	Expression *expr = Parent::mutate( offsetofExpr );
[2a4b088]	1983	offsetofExpr = dynamic_cast< OffsetofExpr* >( expr );
	1984	if ( ! offsetofExpr ) return expr;
	1985
	1986	// only mutate expressions for polymorphic structs/unions
[8a34677]	1987	Type *ty = offsetofExpr->get_type();
	1988	if ( ! findGeneric( ty ) ) return offsetofExpr;
[2a4b088]	1989
	1990	if ( StructInstType structType = dynamic_cast< StructInstType >( ty ) ) {
	1991	// replace offsetof expression by index into offset array
	1992	long i = findMember( offsetofExpr->get_member(), structType->get_baseStruct()->get_members() );
	1993	if ( i == -1 ) return offsetofExpr;
	1994
	1995	Expression *offsetInd = makeOffsetIndex( ty, i );
	1996	delete offsetofExpr;
	1997	return offsetInd;
[5c52b06]	1998	} else if ( dynamic_cast< UnionInstType* >( ty ) ) {
[2a4b088]	1999	// all union members are at offset zero
	2000	delete offsetofExpr;
[ca35c51]	2001	return new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), "0" ) );
[2a4b088]	2002	} else return offsetofExpr;
[05d47278]	2003	}
	2004
[8a34677]	2005	Expression PolyGenericCalculator::mutate( OffsetPackExpr offsetPackExpr ) {
	2006	StructInstType *ty = offsetPackExpr->get_type();
	2007
	2008	Expression *ret = 0;
	2009	if ( findGeneric( ty ) ) {
	2010	// pull offset back from generated type information
[adc6781]	2011	ret = new NameExpr( offsetofName( mangleType( ty ) ) );
[8a34677]	2012	} else {
[adc6781]	2013	std::string offsetName = offsetofName( mangleType( ty ) );
[8a34677]	2014	if ( knownOffsets.find( offsetName ) != knownOffsets.end() ) {
	2015	// use the already-generated offsets for this type
	2016	ret = new NameExpr( offsetName );
	2017	} else {
	2018	knownOffsets.insert( offsetName );
	2019
	2020	std::list< Declaration* > &baseMembers = ty->get_baseStruct()->get_members();
	2021	Type *offsetType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt );
	2022
	2023	// build initializer list for offset array
	2024	std::list< Initializer* > inits;
	2025	for ( std::list< Declaration* >::const_iterator member = baseMembers.begin(); member != baseMembers.end(); ++member ) {
	2026	DeclarationWithType *memberDecl;
	2027	if ( DeclarationWithType origMember = dynamic_cast< DeclarationWithType >( *member ) ) {
	2028	memberDecl = origMember->clone();
	2029	} else {
	2030	memberDecl = new ObjectDecl( (*member)->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, offsetType->clone(), 0 );
	2031	}
	2032	inits.push_back( new SingleInit( new OffsetofExpr( ty->clone(), memberDecl ) ) );
	2033	}
	2034
	2035	// build the offset array and replace the pack with a reference to it
[cb4c607]	2036	ObjectDecl *offsetArray = makeVar( offsetName, new ArrayType( Type::Qualifiers(), offsetType, new ConstantExpr( Constant::from_ulong( baseMembers.size() ) ), false, false ),
[8a34677]	2037	new ListInit( inits ) );
	2038	ret = new VariableExpr( offsetArray );
	2039	}
	2040	}
	2041
	2042	delete offsetPackExpr;
	2043	return ret;
	2044	}
	2045
	2046	void PolyGenericCalculator::doBeginScope() {
	2047	knownLayouts.beginScope();
	2048	knownOffsets.beginScope();
	2049	}
	2050
	2051	void PolyGenericCalculator::doEndScope() {
	2052	knownLayouts.endScope();
[adc6781]	2053	knownOffsets.endScope();
[8a34677]	2054	}
	2055
[05d47278]	2056	////////////////////////////////////////// Pass3 ////////////////////////////////////////////////////
	2057
	2058	template< typename DeclClass >
	2059	DeclClass * Pass3::handleDecl( DeclClass decl, Type type ) {
[6f49cdf]	2060	scopeTyVars.beginScope();
[05d47278]	2061	makeTyVarMap( type, scopeTyVars );
	2062
	2063	DeclClass ret = static_cast< DeclClass >( Mutator::mutate( decl ) );
[f18a711]	2064	ScrubTyVars::scrub( decl, scopeTyVars );
[05d47278]	2065
[6f49cdf]	2066	scopeTyVars.endScope();
[05d47278]	2067	return ret;
	2068	}
	2069
	2070	ObjectDecl * Pass3::mutate( ObjectDecl *objectDecl ) {
	2071	return handleDecl( objectDecl, objectDecl->get_type() );
	2072	}
	2073
	2074	DeclarationWithType * Pass3::mutate( FunctionDecl *functionDecl ) {
	2075	return handleDecl( functionDecl, functionDecl->get_functionType() );
	2076	}
	2077
	2078	TypedefDecl * Pass3::mutate( TypedefDecl *typedefDecl ) {
	2079	return handleDecl( typedefDecl, typedefDecl->get_base() );
	2080	}
	2081
	2082	TypeDecl * Pass3::mutate( TypeDecl *typeDecl ) {
	2083	// Initializer *init = 0;
	2084	// std::list< Expression *> designators;
[2c57025]	2085	// addToTyVarMap( typeDecl, scopeTyVars );
[05d47278]	2086	// if ( typeDecl->get_base() ) {
	2087	// init = new SimpleInit( new SizeofExpr( handleDecl( typeDecl, typeDecl->get_base() ) ), designators );
	2088	// }
	2089	// return new ObjectDecl( typeDecl->get_name(), Declaration::Extern, LinkageSpec::C, 0, new BasicType( Type::Qualifiers(), BasicType::UnsignedInt ), init );
	2090
[2c57025]	2091	addToTyVarMap( typeDecl, scopeTyVars );
[05d47278]	2092	return Mutator::mutate( typeDecl );
	2093	}
	2094
	2095	Type * Pass3::mutate( PointerType *pointerType ) {
[6f49cdf]	2096	scopeTyVars.beginScope();
[05d47278]	2097	makeTyVarMap( pointerType, scopeTyVars );
	2098
	2099	Type *ret = Mutator::mutate( pointerType );
	2100
[6f49cdf]	2101	scopeTyVars.endScope();
[05d47278]	2102	return ret;
	2103	}
	2104
	2105	Type * Pass3::mutate( FunctionType *functionType ) {
[6f49cdf]	2106	scopeTyVars.beginScope();
[05d47278]	2107	makeTyVarMap( functionType, scopeTyVars );
	2108
	2109	Type *ret = Mutator::mutate( functionType );
	2110
[6f49cdf]	2111	scopeTyVars.endScope();
[05d47278]	2112	return ret;
	2113	}
[01aeade]	2114	} // anonymous namespace
[51b73452]	2115	} // namespace GenPoly
[01aeade]	2116
[51587aa]	2117	// Local Variables: //
	2118	// tab-width: 4 //
	2119	// mode: c++ //
	2120	// compile-command: "make install" //
	2121	// End: //

Note: See TracBrowser for help on using the repository browser.

Download in other formats: