| 1 | //
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
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| 3 | //
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| 4 | // The contents of this file are covered under the licence agreement in the
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| 5 | // file "LICENCE" distributed with Cforall.
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| 6 | //
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| 7 | // TypeEnvironment.cc --
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| 8 | //
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| 9 | // Author : Richard C. Bilson
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| 10 | // Created On : Sun May 17 12:19:47 2015
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| 11 | // Last Modified By : Peter A. Buhr
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| 12 | // Last Modified On : Sun May 17 12:23:36 2015
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| 13 | // Update Count : 3
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| 14 | //
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| 15 |
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| 16 | #include <cassert> // for assert
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| 17 | #include <algorithm> // for copy, set_intersection
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| 18 | #include <iterator> // for ostream_iterator, insert_iterator
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| 19 | #include <utility> // for pair
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| 20 |
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| 21 | #include "Common/utility.h" // for maybeClone
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| 22 | #include "SynTree/Type.h" // for Type, FunctionType, Type::Fora...
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| 23 | #include "SynTree/TypeSubstitution.h" // for TypeSubstitution
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| 24 | #include "TypeEnvironment.h"
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| 25 |
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| 26 | namespace ResolvExpr {
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| 27 | // adding this comparison operator significantly improves assertion resolution run time for
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| 28 | // some cases. The current resolution algorithm's speed partially depends on the order of
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| 29 | // assertions. Assertions which have fewer possible matches should appear before
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| 30 | // assertions which have more possible matches. This seems to imply that this could
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| 31 | // be further improved by providing an indexer as an additional argument and ordering based
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| 32 | // on the number of matches of the same kind (object, function) for the names of the
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| 33 | // declarations.
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| 34 | //
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| 35 | // I've seen a TU go from 54 minutes to 1 minute 34 seconds with the addition of this comparator.
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| 36 | bool AssertCompare::operator()( DeclarationWithType * d1, DeclarationWithType * d2 ) const {
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| 37 | // Objects are always less than functions
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| 38 | if ( ObjectDecl * objectDecl1 = dynamic_cast< ObjectDecl * >( d1 ) ) {
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| 39 | if ( ObjectDecl * objectDecl2 = dynamic_cast< ObjectDecl * >( d2 ) ) {
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| 40 | // objects are ordered by name then type pointer, in that order
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| 41 | int cmp = objectDecl1->get_name().compare( objectDecl2->get_name() );
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| 42 | return cmp < 0 ||
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| 43 | ( cmp == 0 && objectDecl1->get_type() < objectDecl2->get_type() );
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| 44 | } else {
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| 45 | return true;
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| 46 | }
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| 47 | } else if ( FunctionDecl * funcDecl1 = dynamic_cast< FunctionDecl * >( d1 ) ) {
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| 48 | if ( FunctionDecl * funcDecl2 = dynamic_cast< FunctionDecl * >( d2 ) ) {
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| 49 | // functions are ordered by name, # parameters, # returnVals, type pointer in that order
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| 50 | FunctionType * ftype1 = funcDecl1->get_functionType();
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| 51 | FunctionType * ftype2 = funcDecl2->get_functionType();
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| 52 | int numThings1 = ftype1->get_parameters().size() + ftype1->get_returnVals().size();
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| 53 | int numThings2 = ftype2->get_parameters().size() + ftype2->get_returnVals().size();
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| 54 | if ( numThings1 < numThings2 ) return true;
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| 55 | if ( numThings1 > numThings2 ) return false;
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| 56 |
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| 57 | // if ( ftype1->get_parameters().size() < ftype2->get_parameters().size() ) return true;
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| 58 | // else if ( ftype1->get_parameters().size() > ftype2->get_parameters().size() ) return false;
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| 59 | // // same number of parameters
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| 60 | // if ( ftype1->get_returnVals().size() < ftype2->get_returnVals().size() ) return true;
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| 61 | // else if ( ftype1->get_returnVals().size() > ftype2->get_returnVals().size() ) return false;
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| 62 | // same number of return vals
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| 63 | // int cmp = funcDecl1->get_name().compare( funcDecl2->get_name() );
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| 64 | // if ( cmp < 0 ) return true;
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| 65 | // else if ( cmp > 0 ) return false;
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| 66 | // // same name
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| 67 | return ftype1 < ftype2;
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| 68 | } else {
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| 69 | return false;
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| 70 | }
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| 71 | } else {
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| 72 | assert( false );
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| 73 | }
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| 74 | }
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| 75 |
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| 76 | void printAssertionSet( const AssertionSet &assertions, std::ostream &os, int indent ) {
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| 77 | for ( AssertionSet::const_iterator i = assertions.begin(); i != assertions.end(); ++i ) {
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| 78 | i->first->print( os, indent );
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| 79 | if ( i->second.isUsed ) {
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| 80 | os << "(used)";
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| 81 | } else {
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| 82 | os << "(not used)";
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| 83 | } // if
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| 84 | } // for
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| 85 | }
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| 86 |
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| 87 | void printOpenVarSet( const OpenVarSet &openVars, std::ostream &os, int indent ) {
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| 88 | os << std::string( indent, ' ' );
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| 89 | for ( OpenVarSet::const_iterator i = openVars.begin(); i != openVars.end(); ++i ) {
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| 90 | os << i->first << "(" << i->second << ") ";
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| 91 | } // for
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| 92 | }
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| 93 |
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| 94 | void EqvClass::initialize( const EqvClass &src, EqvClass &dest ) {
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| 95 | dest.vars = src.vars;
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| 96 | dest.type = maybeClone( src.type );
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| 97 | dest.allowWidening = src.allowWidening;
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| 98 | dest.data = src.data;
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| 99 | }
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| 100 |
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| 101 | EqvClass::EqvClass() : type( 0 ), allowWidening( true ) {
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| 102 | }
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| 103 |
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| 104 | EqvClass::EqvClass( const EqvClass &other ) {
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| 105 | initialize( other, *this );
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| 106 | }
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| 107 |
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| 108 | EqvClass &EqvClass::operator=( const EqvClass &other ) {
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| 109 | if ( this == &other ) return *this;
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| 110 | delete type;
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| 111 | initialize( other, *this );
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| 112 | return *this;
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| 113 | }
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| 114 |
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| 115 | EqvClass::~EqvClass() {
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| 116 | delete type;
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| 117 | }
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| 118 |
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| 119 | void EqvClass::print( std::ostream &os, int indent ) const {
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| 120 | os << std::string( indent, ' ' ) << "( ";
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| 121 | std::copy( vars.begin(), vars.end(), std::ostream_iterator< std::string >( os, " " ) );
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| 122 | os << ")";
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| 123 | if ( type ) {
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| 124 | os << " -> ";
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| 125 | type->print( os, indent );
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| 126 | } // if
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| 127 | if ( ! allowWidening ) {
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| 128 | os << " (no widening)";
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| 129 | } // if
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| 130 | os << std::endl;
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| 131 | }
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| 132 |
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| 133 | bool TypeEnvironment::lookup( const std::string &var, EqvClass &eqvClass ) const {
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| 134 | for ( std::list< EqvClass >::const_iterator i = env.begin(); i != env.end(); ++i ) {
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| 135 | if ( i->vars.find( var ) != i->vars.end() ) {
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| 136 | /// std::cout << var << " is in class ";
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| 137 | /// i->print( std::cout );
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| 138 | eqvClass = *i;
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| 139 | return true;
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| 140 | }
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| 141 | /// std::cout << var << " is not in class ";
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| 142 | /// i->print( std::cout );
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| 143 | } // for
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| 144 | return false;
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| 145 | }
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| 146 |
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| 147 | void TypeEnvironment::add( const EqvClass &eqvClass ) {
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| 148 | std::list< EqvClass >::iterator i = env.begin();
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| 149 | while ( i != env.end() ) {
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| 150 | std::list< EqvClass >::iterator next = i;
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| 151 | next++;
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| 152 | std::set< std::string > intersection;
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| 153 | std::set_intersection( i->vars.begin(), i->vars.end(), eqvClass.vars.begin(), eqvClass.vars.end(), std::inserter( intersection, intersection.begin() ) );
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| 154 | if ( ! intersection.empty() ) {
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| 155 | env.erase( i );
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| 156 | } // if
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| 157 | i = next;
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| 158 | } // while
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| 159 | env.insert( env.end(), eqvClass );
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| 160 | }
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| 161 |
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| 162 | void TypeEnvironment::add( const Type::ForallList &tyDecls ) {
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| 163 | for ( Type::ForallList::const_iterator i = tyDecls.begin(); i != tyDecls.end(); ++i ) {
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| 164 | EqvClass newClass;
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| 165 | newClass.vars.insert( (*i)->get_name() );
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| 166 | newClass.data = TypeDecl::Data{ (*i) };
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| 167 | env.push_back( newClass );
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| 168 | } // for
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| 169 | }
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| 170 |
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| 171 | void TypeEnvironment::makeSubstitution( TypeSubstitution &sub ) const {
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| 172 | for ( std::list< EqvClass >::const_iterator theClass = env.begin(); theClass != env.end(); ++theClass ) {
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| 173 | for ( std::set< std::string >::const_iterator theVar = theClass->vars.begin(); theVar != theClass->vars.end(); ++theVar ) {
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| 174 | /// std::cout << "adding " << *theVar;
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| 175 | if ( theClass->type ) {
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| 176 | /// std::cout << " bound to ";
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| 177 | /// theClass->type->print( std::cout );
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| 178 | /// std::cout << std::endl;
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| 179 | sub.add( *theVar, theClass->type );
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| 180 | } else if ( theVar != theClass->vars.begin() ) {
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| 181 | TypeInstType *newTypeInst = new TypeInstType( Type::Qualifiers(), *theClass->vars.begin(), theClass->data.kind == TypeDecl::Ftype );
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| 182 | /// std::cout << " bound to variable " << *theClass->vars.begin() << std::endl;
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| 183 | sub.add( *theVar, newTypeInst );
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| 184 | delete newTypeInst;
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| 185 | } // if
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| 186 | } // for
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| 187 | } // for
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| 188 | /// std::cerr << "input env is:" << std::endl;
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| 189 | /// print( std::cerr, 8 );
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| 190 | /// std::cerr << "sub is:" << std::endl;
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| 191 | /// sub.print( std::cerr, 8 );
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| 192 | sub.normalize();
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| 193 | }
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| 194 |
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| 195 | void TypeEnvironment::print( std::ostream &os, int indent ) const {
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| 196 | for ( std::list< EqvClass >::const_iterator i = env.begin(); i != env.end(); ++i ) {
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| 197 | i->print( os, indent );
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| 198 | } // for
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| 199 | }
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| 200 |
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| 201 | std::list< EqvClass >::iterator TypeEnvironment::internal_lookup( const std::string &var ) {
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| 202 | for ( std::list< EqvClass >::iterator i = env.begin(); i != env.end(); ++i ) {
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| 203 | if ( i->vars.find( var ) == i->vars.end() ) {
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| 204 | return i;
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| 205 | } // if
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| 206 | } // for
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| 207 | return env.end();
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| 208 | }
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| 209 |
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| 210 | void TypeEnvironment::simpleCombine( const TypeEnvironment &second ) {
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| 211 | env.insert( env.end(), second.env.begin(), second.env.end() );
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| 212 | }
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| 213 |
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| 214 | void TypeEnvironment::combine( const TypeEnvironment &second, Type *(*combineFunc)( Type*, Type* ) ) {
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| 215 | TypeEnvironment secondCopy( second );
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| 216 | for ( std::list< EqvClass >::iterator firstClass = env.begin(); firstClass != env.end(); ++firstClass ) {
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| 217 | EqvClass &newClass = *firstClass;
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| 218 | std::set< std::string > newVars;
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| 219 | for ( std::set< std::string >::const_iterator var = firstClass->vars.begin(); var != firstClass->vars.end(); ++var ) {
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| 220 | std::list< EqvClass >::iterator secondClass = secondCopy.internal_lookup( *var );
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| 221 | if ( secondClass != secondCopy.env.end() ) {
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| 222 | newVars.insert( secondClass->vars.begin(), secondClass->vars.end() );
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| 223 | if ( secondClass->type ) {
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| 224 | if ( newClass.type ) {
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| 225 | Type *newType = combineFunc( newClass.type, secondClass->type );
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| 226 | delete newClass.type;
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| 227 | newClass.type = newType;
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| 228 | newClass.allowWidening = newClass.allowWidening && secondClass->allowWidening;
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| 229 | } else {
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| 230 | newClass.type = secondClass->type->clone();
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| 231 | newClass.allowWidening = secondClass->allowWidening;
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| 232 | } // if
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| 233 | } // if
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| 234 | secondCopy.env.erase( secondClass );
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| 235 | } // if
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| 236 | } // for
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| 237 | newClass.vars.insert( newVars.begin(), newVars.end() );
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| 238 | } // for
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| 239 | for ( std::list< EqvClass >::iterator secondClass = secondCopy.env.begin(); secondClass != secondCopy.env.end(); ++secondClass ) {
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| 240 | env.push_back( *secondClass );
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| 241 | } // for
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| 242 | }
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| 243 |
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| 244 | void TypeEnvironment::extractOpenVars( OpenVarSet &openVars ) const {
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| 245 | for ( std::list< EqvClass >::const_iterator eqvClass = env.begin(); eqvClass != env.end(); ++eqvClass ) {
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| 246 | for ( std::set< std::string >::const_iterator var = eqvClass->vars.begin(); var != eqvClass->vars.end(); ++var ) {
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| 247 | openVars[ *var ] = eqvClass->data;
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| 248 | } // for
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| 249 | } // for
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| 250 | }
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| 251 |
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| 252 | } // namespace ResolvExpr
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| 253 |
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| 254 | // Local Variables: //
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| 255 | // tab-width: 4 //
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| 256 | // mode: c++ //
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| 257 | // compile-command: "make install" //
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| 258 | // End: //
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