source: src/ResolvExpr/AlternativeFinder.h@ 53452de

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 53452de was 6d2f993, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Move referenceToRvalueConversion declaration
  • Property mode set to 100644
File size: 8.0 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// AlternativeFinder.h --
8//
9// Author : Richard C. Bilson
10// Created On : Sat May 16 23:56:12 2015
11// Last Modified By : Andrew Beach
12// Last Modified On : Wed Jul 26 11:24:00 2017
13// Update Count : 4
14//
15
16#pragma once
17
18#include <algorithm> // for copy
19#include <list> // for list
20#include <string> // for string
21
22#include "Alternative.h" // for AltList, Alternative
23#include "ExplodedActual.h" // for ExplodedActual
24#include "ResolvExpr/Cost.h" // for Cost, Cost::infinity
25#include "ResolvExpr/TypeEnvironment.h" // for AssertionSet, OpenVarSet
26#include "SynTree/Visitor.h" // for Visitor
27#include "SynTree/SynTree.h" // for Visitor Nodes
28
29namespace SymTab {
30class Indexer;
31} // namespace SymTab
32
33namespace ResolvExpr {
34 struct ArgPack;
35
36 /// First index is which argument, second index is which alternative for that argument,
37 /// third index is which exploded element of that alternative
38 using ExplodedArgs = std::vector< std::vector< ExplodedActual > >;
39
40 class AlternativeFinder : public Visitor {
41 public:
42 AlternativeFinder( const SymTab::Indexer &indexer, const TypeEnvironment &env );
43
44 AlternativeFinder( const AlternativeFinder& o )
45 : indexer(o.indexer), alternatives(o.alternatives), env(o.env),
46 targetType(o.targetType) {}
47
48 AlternativeFinder( AlternativeFinder&& o )
49 : indexer(o.indexer), alternatives(std::move(o.alternatives)), env(o.env),
50 targetType(o.targetType) {}
51
52 AlternativeFinder& operator= ( const AlternativeFinder& o ) {
53 if (&o == this) return *this;
54
55 // horrific nasty hack to rebind references...
56 alternatives.~AltList();
57 new(this) AlternativeFinder(o);
58 return *this;
59 }
60
61 AlternativeFinder& operator= ( AlternativeFinder&& o ) {
62 if (&o == this) return *this;
63
64 // horrific nasty hack to rebind references...
65 alternatives.~AltList();
66 new(this) AlternativeFinder(std::move(o));
67 return *this;
68 }
69
70 void find( Expression *expr, bool adjust = false, bool prune = true, bool failFast = true );
71 /// Calls find with the adjust flag set; adjustment turns array and function types into equivalent pointer types
72 void findWithAdjustment( Expression *expr );
73 /// Calls find with the adjust flag set and prune flag unset; pruning ensures there is at most one alternative per result type
74 void findWithoutPrune( Expression *expr );
75 /// Calls find with the adjust and prune flags set, failFast flags unset; fail fast ensures that there is at least one resulting alternative
76 void maybeFind( Expression *expr );
77 AltList &get_alternatives() { return alternatives; }
78
79 // make this look like an STL container so that we can apply generic algorithms
80 typedef Alternative value_type;
81 typedef AltList::iterator iterator;
82 typedef AltList::const_iterator const_iterator;
83 AltList::iterator begin() { return alternatives.begin(); }
84 AltList::iterator end() { return alternatives.end(); }
85 AltList::const_iterator begin() const { return alternatives.begin(); }
86 AltList::const_iterator end() const { return alternatives.end(); }
87
88 const SymTab::Indexer &get_indexer() const { return indexer; }
89 const TypeEnvironment &get_environ() const { return env; }
90
91 /// Runs a new alternative finder on each element in [begin, end)
92 /// and writes each alternative finder to out.
93 template< typename InputIterator, typename OutputIterator >
94 void findSubExprs( InputIterator begin, InputIterator end, OutputIterator out );
95 private:
96 virtual void visit( ApplicationExpr *applicationExpr );
97 virtual void visit( UntypedExpr *untypedExpr );
98 virtual void visit( AddressExpr *addressExpr );
99 virtual void visit( LabelAddressExpr *labelExpr );
100 virtual void visit( CastExpr *castExpr );
101 virtual void visit( VirtualCastExpr *castExpr );
102 virtual void visit( UntypedMemberExpr *memberExpr );
103 virtual void visit( MemberExpr *memberExpr );
104 virtual void visit( NameExpr *variableExpr );
105 virtual void visit( VariableExpr *variableExpr );
106 virtual void visit( ConstantExpr *constantExpr );
107 virtual void visit( SizeofExpr *sizeofExpr );
108 virtual void visit( AlignofExpr *alignofExpr );
109 virtual void visit( UntypedOffsetofExpr *offsetofExpr );
110 virtual void visit( OffsetofExpr *offsetofExpr );
111 virtual void visit( OffsetPackExpr *offsetPackExpr );
112 virtual void visit( AttrExpr *attrExpr );
113 virtual void visit( LogicalExpr *logicalExpr );
114 virtual void visit( ConditionalExpr *conditionalExpr );
115 virtual void visit( CommaExpr *commaExpr );
116 virtual void visit( ImplicitCopyCtorExpr * impCpCtorExpr );
117 virtual void visit( ConstructorExpr * ctorExpr );
118 virtual void visit( RangeExpr * rangeExpr );
119 virtual void visit( UntypedTupleExpr *tupleExpr );
120 virtual void visit( TupleExpr *tupleExpr );
121 virtual void visit( TupleIndexExpr *tupleExpr );
122 virtual void visit( TupleAssignExpr *tupleExpr );
123 virtual void visit( UniqueExpr *unqExpr );
124 virtual void visit( StmtExpr *stmtExpr );
125 virtual void visit( UntypedInitExpr *initExpr );
126
127 /// Adds alternatives for anonymous members
128 void addAnonConversions( const Alternative & alt );
129 /// Adds alternatives for member expressions, given the aggregate, conversion cost for that aggregate, and name of the member
130 template< typename StructOrUnionType > void addAggMembers( StructOrUnionType *aggInst, Expression *expr, const Cost &newCost, const TypeEnvironment & env, Expression * member );
131 /// Adds alternatives for member expressions where the left side has tuple type
132 void addTupleMembers( TupleType * tupleType, Expression *expr, const Cost &newCost, const TypeEnvironment & env, Expression * member );
133 /// Adds alternatives for offsetof expressions, given the base type and name of the member
134 template< typename StructOrUnionType > void addOffsetof( StructOrUnionType *aggInst, const std::string &name );
135 /// Takes a final result and checks if its assertions can be satisfied
136 template<typename OutputIterator>
137 void validateFunctionAlternative( const Alternative &func, ArgPack& result, const std::vector<ArgPack>& results, OutputIterator out );
138 /// Finds matching alternatives for a function, given a set of arguments
139 template<typename OutputIterator>
140 void makeFunctionAlternatives( const Alternative &func, FunctionType *funcType, const ExplodedArgs& args, OutputIterator out );
141 /// Checks if assertion parameters match for a new alternative
142 template< typename OutputIterator >
143 void inferParameters( const AssertionSet &need, AssertionSet &have, const Alternative &newAlt, OpenVarSet &openVars, OutputIterator out );
144
145 const SymTab::Indexer &indexer;
146 AltList alternatives;
147 const TypeEnvironment &env;
148 Type * targetType = nullptr;
149 }; // AlternativeFinder
150
151 Expression *resolveInVoidContext( Expression *expr, const SymTab::Indexer &indexer, TypeEnvironment &env );
152
153 template< typename InputIterator, typename OutputIterator >
154 void findMinCost( InputIterator begin, InputIterator end, OutputIterator out ) {
155 AltList alternatives;
156
157 // select the alternatives that have the minimum parameter cost
158 Cost minCost = Cost::infinity;
159 for ( InputIterator i = begin; i != end; ++i ) {
160 if ( i->cost < minCost ) {
161 minCost = i->cost;
162 i->cost = i->cvtCost;
163 alternatives.clear();
164 alternatives.push_back( *i );
165 } else if ( i->cost == minCost ) {
166 i->cost = i->cvtCost;
167 alternatives.push_back( *i );
168 }
169 }
170 std::copy( alternatives.begin(), alternatives.end(), out );
171 }
172
173 Cost sumCost( const AltList &in );
174 void printAlts( const AltList &list, std::ostream &os, unsigned int indentAmt = 0 );
175
176 template< typename InputIterator >
177 void simpleCombineEnvironments( InputIterator begin, InputIterator end, TypeEnvironment &result ) {
178 while ( begin != end ) {
179 result.simpleCombine( (*begin++).env );
180 }
181 }
182
183} // namespace ResolvExpr
184
185// Local Variables: //
186// tab-width: 4 //
187// mode: c++ //
188// compile-command: "make install" //
189// End: //
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