[d180746] | 1 | #include <algorithm> // for find, all_of |
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[e3e16bc] | 2 | #include <cassert> // for assertf, assert, strict_dynamic_cast |
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[d180746] | 3 | #include <iostream> // for ostream, cerr, endl |
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| 4 | #include <iterator> // for back_insert_iterator, back_inserter |
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| 5 | #include <memory> // for __shared_ptr |
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| 6 | |
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[9e1d485] | 7 | #include "AST/Type.hpp" |
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[fd236ed] | 8 | #include "Common/PassVisitor.h" |
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[d180746] | 9 | #include "Common/SemanticError.h" // for SemanticError |
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| 10 | #include "Common/UniqueName.h" // for UniqueName |
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| 11 | #include "Common/utility.h" // for toString, deleteAll, maybeClone |
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| 12 | #include "GenPoly/GenPoly.h" // for getFunctionType |
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[2b46a13] | 13 | #include "InitTweak.h" |
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[d180746] | 14 | #include "Parser/LinkageSpec.h" // for Spec, isBuiltin, Intrinsic |
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| 15 | #include "ResolvExpr/typeops.h" // for typesCompatibleIgnoreQualifiers |
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[f5c3b6c] | 16 | #include "SymTab/Autogen.h" |
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[d180746] | 17 | #include "SymTab/Indexer.h" // for Indexer |
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| 18 | #include "SynTree/Attribute.h" // for Attribute |
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| 19 | #include "SynTree/Constant.h" // for Constant |
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| 20 | #include "SynTree/Declaration.h" // for ObjectDecl, DeclarationWithType |
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| 21 | #include "SynTree/Expression.h" // for Expression, UntypedExpr, Applicati... |
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| 22 | #include "SynTree/Initializer.h" // for Initializer, ListInit, Designation |
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[ba3706f] | 23 | #include "SynTree/Label.h" // for Label |
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[d180746] | 24 | #include "SynTree/Statement.h" // for CompoundStmt, ExprStmt, BranchStmt |
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| 25 | #include "SynTree/Type.h" // for FunctionType, ArrayType, PointerType |
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| 26 | #include "SynTree/Visitor.h" // for Visitor, maybeAccept |
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[29bc63e] | 27 | #include "Tuples/Tuples.h" // for Tuples::isTtype |
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[d180746] | 28 | |
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| 29 | class UntypedValofExpr; |
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[2b46a13] | 30 | |
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| 31 | namespace InitTweak { |
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[64071c2] | 32 | namespace { |
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[1fbeebd] | 33 | struct HasDesignations : public WithShortCircuiting { |
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[64071c2] | 34 | bool hasDesignations = false; |
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[fd236ed] | 35 | |
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| 36 | void previsit( BaseSyntaxNode * ) { |
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| 37 | // short circuit if we already know there are designations |
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| 38 | if ( hasDesignations ) visit_children = false; |
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| 39 | } |
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| 40 | |
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| 41 | void previsit( Designation * des ) { |
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| 42 | // short circuit if we already know there are designations |
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| 43 | if ( hasDesignations ) visit_children = false; |
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| 44 | else if ( ! des->get_designators().empty() ) { |
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| 45 | hasDesignations = true; |
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| 46 | visit_children = false; |
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| 47 | } |
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[64071c2] | 48 | } |
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| 49 | }; |
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[2b46a13] | 50 | |
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[ef3d798] | 51 | struct InitDepthChecker : public WithGuards { |
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[dcd73d1] | 52 | bool depthOkay = true; |
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| 53 | Type * type; |
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| 54 | int curDepth = 0, maxDepth = 0; |
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| 55 | InitDepthChecker( Type * type ) : type( type ) { |
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| 56 | Type * t = type; |
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| 57 | while ( ArrayType * at = dynamic_cast< ArrayType * >( t ) ) { |
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| 58 | maxDepth++; |
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| 59 | t = at->get_base(); |
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| 60 | } |
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| 61 | maxDepth++; |
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| 62 | } |
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[ef3d798] | 63 | void previsit( ListInit * ) { |
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[dcd73d1] | 64 | curDepth++; |
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[ef3d798] | 65 | GuardAction( [this]() { curDepth--; } ); |
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[dcd73d1] | 66 | if ( curDepth > maxDepth ) depthOkay = false; |
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| 67 | } |
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| 68 | }; |
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| 69 | |
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[c3f551b] | 70 | struct InitFlattener : public WithShortCircuiting { |
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| 71 | void previsit( SingleInit * singleInit ) { |
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| 72 | visit_children = false; |
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| 73 | argList.push_back( singleInit->value->clone() ); |
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| 74 | } |
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[64071c2] | 75 | std::list< Expression * > argList; |
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| 76 | }; |
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[2b46a13] | 77 | |
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[64071c2] | 78 | } |
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[2b46a13] | 79 | |
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[64071c2] | 80 | std::list< Expression * > makeInitList( Initializer * init ) { |
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[c3f551b] | 81 | PassVisitor<InitFlattener> flattener; |
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[4d2434a] | 82 | maybeAccept( init, flattener ); |
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[c3f551b] | 83 | return flattener.pass.argList; |
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[64071c2] | 84 | } |
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[2b46a13] | 85 | |
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[64071c2] | 86 | bool isDesignated( Initializer * init ) { |
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[fd236ed] | 87 | PassVisitor<HasDesignations> finder; |
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[64071c2] | 88 | maybeAccept( init, finder ); |
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[fd236ed] | 89 | return finder.pass.hasDesignations; |
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[dcd73d1] | 90 | } |
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| 91 | |
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| 92 | bool checkInitDepth( ObjectDecl * objDecl ) { |
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[ef3d798] | 93 | PassVisitor<InitDepthChecker> checker( objDecl->type ); |
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| 94 | maybeAccept( objDecl->init, checker ); |
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| 95 | return checker.pass.depthOkay; |
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[64071c2] | 96 | } |
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[2b46a13] | 97 | |
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[39f84a4] | 98 | class InitExpander::ExpanderImpl { |
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| 99 | public: |
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[3351cc0] | 100 | virtual ~ExpanderImpl() = default; |
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[39f84a4] | 101 | virtual std::list< Expression * > next( std::list< Expression * > & indices ) = 0; |
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[4d2434a] | 102 | virtual Statement * buildListInit( UntypedExpr * callExpr, std::list< Expression * > & indices ) = 0; |
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[39f84a4] | 103 | }; |
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| 104 | |
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| 105 | class InitImpl : public InitExpander::ExpanderImpl { |
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| 106 | public: |
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[4d2434a] | 107 | InitImpl( Initializer * init ) : init( init ) {} |
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[bd41764] | 108 | virtual ~InitImpl() = default; |
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[39f84a4] | 109 | |
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[7e003011] | 110 | virtual std::list< Expression * > next( __attribute((unused)) std::list< Expression * > & indices ) { |
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[39f84a4] | 111 | // this is wrong, but just a placeholder for now |
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[4d2434a] | 112 | // if ( ! flattened ) flatten( indices ); |
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| 113 | // return ! inits.empty() ? makeInitList( inits.front() ) : std::list< Expression * >(); |
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| 114 | return makeInitList( init ); |
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[39f84a4] | 115 | } |
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[4d2434a] | 116 | |
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| 117 | virtual Statement * buildListInit( UntypedExpr * callExpr, std::list< Expression * > & indices ); |
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[39f84a4] | 118 | private: |
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[4d2434a] | 119 | Initializer * init; |
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[39f84a4] | 120 | }; |
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| 121 | |
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| 122 | class ExprImpl : public InitExpander::ExpanderImpl { |
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| 123 | public: |
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| 124 | ExprImpl( Expression * expr ) : arg( expr ) {} |
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[bd41764] | 125 | virtual ~ExprImpl() { delete arg; } |
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[9b4c936] | 126 | |
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[39f84a4] | 127 | virtual std::list< Expression * > next( std::list< Expression * > & indices ) { |
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| 128 | std::list< Expression * > ret; |
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| 129 | Expression * expr = maybeClone( arg ); |
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| 130 | if ( expr ) { |
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| 131 | for ( std::list< Expression * >::reverse_iterator it = indices.rbegin(); it != indices.rend(); ++it ) { |
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| 132 | // go through indices and layer on subscript exprs ?[?] |
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| 133 | ++it; |
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| 134 | UntypedExpr * subscriptExpr = new UntypedExpr( new NameExpr( "?[?]") ); |
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| 135 | subscriptExpr->get_args().push_back( expr ); |
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| 136 | subscriptExpr->get_args().push_back( (*it)->clone() ); |
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| 137 | expr = subscriptExpr; |
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| 138 | } |
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| 139 | ret.push_back( expr ); |
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| 140 | } |
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| 141 | return ret; |
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| 142 | } |
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[4d2434a] | 143 | |
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| 144 | virtual Statement * buildListInit( UntypedExpr * callExpr, std::list< Expression * > & indices ); |
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[39f84a4] | 145 | private: |
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| 146 | Expression * arg; |
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| 147 | }; |
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| 148 | |
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| 149 | InitExpander::InitExpander( Initializer * init ) : expander( new InitImpl( init ) ) {} |
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| 150 | |
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| 151 | InitExpander::InitExpander( Expression * expr ) : expander( new ExprImpl( expr ) ) {} |
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| 152 | |
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| 153 | std::list< Expression * > InitExpander::operator*() { |
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| 154 | return cur; |
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| 155 | } |
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| 156 | |
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| 157 | InitExpander & InitExpander::operator++() { |
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| 158 | cur = expander->next( indices ); |
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| 159 | return *this; |
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| 160 | } |
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| 161 | |
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| 162 | // use array indices list to build switch statement |
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| 163 | void InitExpander::addArrayIndex( Expression * index, Expression * dimension ) { |
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| 164 | indices.push_back( index ); |
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| 165 | indices.push_back( dimension ); |
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| 166 | } |
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| 167 | |
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[4d2434a] | 168 | void InitExpander::clearArrayIndices() { |
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[9b4c936] | 169 | deleteAll( indices ); |
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[4d2434a] | 170 | indices.clear(); |
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[1a5ad8c] | 171 | } |
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| 172 | |
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| 173 | bool InitExpander::addReference() { |
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| 174 | bool added = false; |
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| 175 | for ( Expression *& expr : cur ) { |
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| 176 | expr = new AddressExpr( expr ); |
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| 177 | added = true; |
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| 178 | } |
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| 179 | return added; |
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[4d2434a] | 180 | } |
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| 181 | |
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| 182 | namespace { |
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[f9cebb5] | 183 | /// given index i, dimension d, initializer init, and callExpr f, generates |
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| 184 | /// if (i < d) f(..., init) |
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| 185 | /// ++i; |
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| 186 | /// so that only elements within the range of the array are constructed |
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[4d2434a] | 187 | template< typename OutIterator > |
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[f9cebb5] | 188 | void buildCallExpr( UntypedExpr * callExpr, Expression * index, Expression * dimension, Initializer * init, OutIterator out ) { |
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[4d2434a] | 189 | UntypedExpr * cond = new UntypedExpr( new NameExpr( "?<?") ); |
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| 190 | cond->get_args().push_back( index->clone() ); |
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| 191 | cond->get_args().push_back( dimension->clone() ); |
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| 192 | |
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| 193 | std::list< Expression * > args = makeInitList( init ); |
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| 194 | callExpr->get_args().splice( callExpr->get_args().end(), args ); |
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| 195 | |
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[ba3706f] | 196 | *out++ = new IfStmt( cond, new ExprStmt( callExpr ), nullptr ); |
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[4d2434a] | 197 | |
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| 198 | UntypedExpr * increment = new UntypedExpr( new NameExpr( "++?" ) ); |
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[175ad32] | 199 | increment->get_args().push_back( index->clone() ); |
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[ba3706f] | 200 | *out++ = new ExprStmt( increment ); |
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[4d2434a] | 201 | } |
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| 202 | |
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| 203 | template< typename OutIterator > |
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| 204 | void build( UntypedExpr * callExpr, InitExpander::IndexList::iterator idx, InitExpander::IndexList::iterator idxEnd, Initializer * init, OutIterator out ) { |
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| 205 | if ( idx == idxEnd ) return; |
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| 206 | Expression * index = *idx++; |
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| 207 | assert( idx != idxEnd ); |
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| 208 | Expression * dimension = *idx++; |
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| 209 | |
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[f9cebb5] | 210 | // xxx - may want to eventually issue a warning here if we can detect |
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| 211 | // that the number of elements exceeds to dimension of the array |
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[4d2434a] | 212 | if ( idx == idxEnd ) { |
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| 213 | if ( ListInit * listInit = dynamic_cast< ListInit * >( init ) ) { |
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| 214 | for ( Initializer * init : *listInit ) { |
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[f9cebb5] | 215 | buildCallExpr( callExpr->clone(), index, dimension, init, out ); |
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[4d2434a] | 216 | } |
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| 217 | } else { |
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[f9cebb5] | 218 | buildCallExpr( callExpr->clone(), index, dimension, init, out ); |
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[4d2434a] | 219 | } |
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| 220 | } else { |
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| 221 | std::list< Statement * > branches; |
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| 222 | |
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| 223 | unsigned long cond = 0; |
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| 224 | ListInit * listInit = dynamic_cast< ListInit * >( init ); |
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| 225 | if ( ! listInit ) { |
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| 226 | // xxx - this shouldn't be an error, but need a way to |
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| 227 | // terminate without creating output, so should catch this error |
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[a16764a6] | 228 | SemanticError( init->location, "unbalanced list initializers" ); |
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[4d2434a] | 229 | } |
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[f9cebb5] | 230 | |
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| 231 | static UniqueName targetLabel( "L__autogen__" ); |
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| 232 | Label switchLabel( targetLabel.newName(), 0, std::list< Attribute * >{ new Attribute("unused") } ); |
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[4d2434a] | 233 | for ( Initializer * init : *listInit ) { |
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| 234 | Expression * condition; |
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| 235 | // check for designations |
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| 236 | // if ( init-> ) { |
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| 237 | condition = new ConstantExpr( Constant::from_ulong( cond ) ); |
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| 238 | ++cond; |
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| 239 | // } else { |
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| 240 | // condition = // ... take designation |
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| 241 | // cond = // ... take designation+1 |
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| 242 | // } |
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| 243 | std::list< Statement * > stmts; |
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| 244 | build( callExpr, idx, idxEnd, init, back_inserter( stmts ) ); |
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[ba3706f] | 245 | stmts.push_back( new BranchStmt( switchLabel, BranchStmt::Break ) ); |
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| 246 | CaseStmt * caseStmt = new CaseStmt( condition, stmts ); |
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[4d2434a] | 247 | branches.push_back( caseStmt ); |
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| 248 | } |
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[ba3706f] | 249 | *out++ = new SwitchStmt( index->clone(), branches ); |
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| 250 | *out++ = new NullStmt( { switchLabel } ); |
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[4d2434a] | 251 | } |
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| 252 | } |
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| 253 | } |
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| 254 | |
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| 255 | // if array came with an initializer list: initialize each element |
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| 256 | // may have more initializers than elements in the array - need to check at each index that |
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| 257 | // we haven't exceeded size. |
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| 258 | // may have fewer initializers than elements in the array - need to default construct |
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| 259 | // remaining elements. |
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| 260 | // To accomplish this, generate switch statement, consuming all of expander's elements |
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| 261 | Statement * InitImpl::buildListInit( UntypedExpr * dst, std::list< Expression * > & indices ) { |
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[22bc276] | 262 | if ( ! init ) return nullptr; |
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[ba3706f] | 263 | CompoundStmt * block = new CompoundStmt(); |
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[f9cebb5] | 264 | build( dst, indices.begin(), indices.end(), init, back_inserter( block->get_kids() ) ); |
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| 265 | if ( block->get_kids().empty() ) { |
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| 266 | delete block; |
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[22bc276] | 267 | return nullptr; |
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[4d2434a] | 268 | } else { |
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[22bc276] | 269 | init = nullptr; // init was consumed in creating the list init |
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[f9cebb5] | 270 | return block; |
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[4d2434a] | 271 | } |
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[39f84a4] | 272 | } |
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| 273 | |
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[22bc276] | 274 | Statement * ExprImpl::buildListInit( UntypedExpr *, std::list< Expression * > & ) { |
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| 275 | return nullptr; |
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[4d2434a] | 276 | } |
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| 277 | |
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| 278 | Statement * InitExpander::buildListInit( UntypedExpr * dst ) { |
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| 279 | return expander->buildListInit( dst, indices ); |
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| 280 | } |
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| 281 | |
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[549c006] | 282 | Type * getTypeofThis( FunctionType * ftype ) { |
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| 283 | assertf( ftype, "getTypeofThis: nullptr ftype" ); |
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| 284 | ObjectDecl * thisParam = getParamThis( ftype ); |
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[7fc7cdb] | 285 | ReferenceType * refType = strict_dynamic_cast< ReferenceType * >( thisParam->type ); |
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| 286 | return refType->base; |
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| 287 | } |
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| 288 | |
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[549c006] | 289 | ObjectDecl * getParamThis( FunctionType * ftype ) { |
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| 290 | assertf( ftype, "getParamThis: nullptr ftype" ); |
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[7fc7cdb] | 291 | auto & params = ftype->parameters; |
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[549c006] | 292 | assertf( ! params.empty(), "getParamThis: ftype with 0 parameters: %s", toString( ftype ).c_str() ); |
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[7fc7cdb] | 293 | return strict_dynamic_cast< ObjectDecl * >( params.front() ); |
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| 294 | } |
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| 295 | |
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[22bc276] | 296 | bool tryConstruct( DeclarationWithType * dwt ) { |
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| 297 | ObjectDecl * objDecl = dynamic_cast< ObjectDecl * >( dwt ); |
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| 298 | if ( ! objDecl ) return false; |
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[df7a162] | 299 | return (objDecl->get_init() == nullptr || |
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[22bc276] | 300 | ( objDecl->get_init() != nullptr && objDecl->get_init()->get_maybeConstructed() )) |
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| 301 | && ! objDecl->get_storageClasses().is_extern |
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[29bc63e] | 302 | && isConstructable( objDecl->type ); |
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| 303 | } |
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| 304 | |
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| 305 | bool isConstructable( Type * type ) { |
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| 306 | return ! dynamic_cast< VarArgsType * >( type ) && ! dynamic_cast< ReferenceType * >( type ) && ! dynamic_cast< FunctionType * >( type ) && ! Tuples::isTtype( type ); |
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[64071c2] | 307 | } |
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[2b46a13] | 308 | |
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[0a6aad4] | 309 | struct CallFinder { |
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[4d2434a] | 310 | CallFinder( const std::list< std::string > & names ) : names( names ) {} |
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| 311 | |
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[0a6aad4] | 312 | void postvisit( ApplicationExpr * appExpr ) { |
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[4d2434a] | 313 | handleCallExpr( appExpr ); |
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| 314 | } |
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| 315 | |
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[0a6aad4] | 316 | void postvisit( UntypedExpr * untypedExpr ) { |
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[4d2434a] | 317 | handleCallExpr( untypedExpr ); |
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| 318 | } |
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| 319 | |
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| 320 | std::list< Expression * > * matches; |
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| 321 | private: |
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| 322 | const std::list< std::string > names; |
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| 323 | |
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| 324 | template< typename CallExpr > |
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| 325 | void handleCallExpr( CallExpr * expr ) { |
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| 326 | std::string fname = getFunctionName( expr ); |
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| 327 | if ( std::find( names.begin(), names.end(), fname ) != names.end() ) { |
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| 328 | matches->push_back( expr ); |
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[cad355a] | 329 | } |
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[64071c2] | 330 | } |
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[4d2434a] | 331 | }; |
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| 332 | |
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| 333 | void collectCtorDtorCalls( Statement * stmt, std::list< Expression * > & matches ) { |
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[0a6aad4] | 334 | static PassVisitor<CallFinder> finder( std::list< std::string >{ "?{}", "^?{}" } ); |
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| 335 | finder.pass.matches = &matches; |
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[4d2434a] | 336 | maybeAccept( stmt, finder ); |
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[64071c2] | 337 | } |
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[4d2434a] | 338 | |
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| 339 | Expression * getCtorDtorCall( Statement * stmt ) { |
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| 340 | std::list< Expression * > matches; |
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| 341 | collectCtorDtorCalls( stmt, matches ); |
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| 342 | assert( matches.size() <= 1 ); |
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[22bc276] | 343 | return matches.size() == 1 ? matches.front() : nullptr; |
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[4d2434a] | 344 | } |
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| 345 | |
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[aedfd91] | 346 | namespace { |
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[599b386] | 347 | DeclarationWithType * getCalledFunction( Expression * expr ); |
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| 348 | |
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| 349 | template<typename CallExpr> |
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| 350 | DeclarationWithType * handleDerefCalledFunction( CallExpr * expr ) { |
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| 351 | // (*f)(x) => should get "f" |
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| 352 | std::string name = getFunctionName( expr ); |
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| 353 | assertf( name == "*?", "Unexpected untyped expression: %s", name.c_str() ); |
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[b128d3e] | 354 | assertf( ! expr->get_args().empty(), "Cannot get called function from dereference with no arguments" ); |
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[599b386] | 355 | return getCalledFunction( expr->get_args().front() ); |
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| 356 | } |
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| 357 | |
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[ee1635c8] | 358 | DeclarationWithType * getCalledFunction( Expression * expr ) { |
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| 359 | assert( expr ); |
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| 360 | if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( expr ) ) { |
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[6fc5c14] | 361 | return varExpr->var; |
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[ee1635c8] | 362 | } else if ( MemberExpr * memberExpr = dynamic_cast< MemberExpr * >( expr ) ) { |
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[6fc5c14] | 363 | return memberExpr->member; |
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[ee1635c8] | 364 | } else if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( expr ) ) { |
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[6fc5c14] | 365 | return getCalledFunction( castExpr->arg ); |
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[599b386] | 366 | } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * >( expr ) ) { |
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| 367 | return handleDerefCalledFunction( untypedExpr ); |
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| 368 | } else if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * > ( expr ) ) { |
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| 369 | return handleDerefCalledFunction( appExpr ); |
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[f3b0a07] | 370 | } else if ( AddressExpr * addrExpr = dynamic_cast< AddressExpr * >( expr ) ) { |
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[6fc5c14] | 371 | return getCalledFunction( addrExpr->arg ); |
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| 372 | } else if ( CommaExpr * commaExpr = dynamic_cast< CommaExpr * >( expr ) ) { |
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| 373 | return getCalledFunction( commaExpr->arg2 ); |
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[ee1635c8] | 374 | } |
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| 375 | return nullptr; |
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[aedfd91] | 376 | } |
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| 377 | } |
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[70f89d00] | 378 | |
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[b7b8674] | 379 | DeclarationWithType * getFunction( Expression * expr ) { |
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| 380 | if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr ) ) { |
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| 381 | return getCalledFunction( appExpr->get_function() ); |
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| 382 | } else if ( UntypedExpr * untyped = dynamic_cast< UntypedExpr * > ( expr ) ) { |
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| 383 | return getCalledFunction( untyped->get_function() ); |
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| 384 | } |
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| 385 | assertf( false, "getFunction received unknown expression: %s", toString( expr ).c_str() ); |
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| 386 | } |
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| 387 | |
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[aedfd91] | 388 | ApplicationExpr * isIntrinsicCallExpr( Expression * expr ) { |
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| 389 | ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr ); |
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[22bc276] | 390 | if ( ! appExpr ) return nullptr; |
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[ee1635c8] | 391 | DeclarationWithType * function = getCalledFunction( appExpr->get_function() ); |
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[f3b0a07] | 392 | assertf( function, "getCalledFunction returned nullptr: %s", toString( appExpr->get_function() ).c_str() ); |
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[64071c2] | 393 | // check for Intrinsic only - don't want to remove all overridable ctor/dtors because autogenerated ctor/dtor |
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| 394 | // will call all member dtors, and some members may have a user defined dtor. |
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[22bc276] | 395 | return function->get_linkage() == LinkageSpec::Intrinsic ? appExpr : nullptr; |
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[aedfd91] | 396 | } |
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| 397 | |
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[a465caf] | 398 | namespace { |
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| 399 | template <typename Predicate> |
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| 400 | bool allofCtorDtor( Statement * stmt, const Predicate & pred ) { |
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| 401 | std::list< Expression * > callExprs; |
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| 402 | collectCtorDtorCalls( stmt, callExprs ); |
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| 403 | // if ( callExprs.empty() ) return false; // xxx - do I still need this check? |
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| 404 | return std::all_of( callExprs.begin(), callExprs.end(), pred); |
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| 405 | } |
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| 406 | } |
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| 407 | |
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[f9cebb5] | 408 | bool isIntrinsicSingleArgCallStmt( Statement * stmt ) { |
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[a465caf] | 409 | return allofCtorDtor( stmt, []( Expression * callExpr ){ |
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[4d2434a] | 410 | if ( ApplicationExpr * appExpr = isIntrinsicCallExpr( callExpr ) ) { |
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[f072892] | 411 | FunctionType *funcType = GenPoly::getFunctionType( appExpr->function->result ); |
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[4d2434a] | 412 | assert( funcType ); |
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| 413 | return funcType->get_parameters().size() == 1; |
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| 414 | } |
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| 415 | return false; |
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| 416 | }); |
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[64071c2] | 417 | } |
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[f1b1e4c] | 418 | |
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[a465caf] | 419 | bool isIntrinsicCallStmt( Statement * stmt ) { |
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| 420 | return allofCtorDtor( stmt, []( Expression * callExpr ) { |
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| 421 | return isIntrinsicCallExpr( callExpr ); |
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| 422 | }); |
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| 423 | } |
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| 424 | |
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[64071c2] | 425 | namespace { |
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| 426 | template<typename CallExpr> |
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| 427 | Expression *& callArg( CallExpr * callExpr, unsigned int pos ) { |
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[a61ad31] | 428 | if ( pos >= callExpr->get_args().size() ) assertf( false, "getCallArg for argument that doesn't exist: (%u); %s.", pos, toString( callExpr ).c_str() ); |
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[64071c2] | 429 | for ( Expression *& arg : callExpr->get_args() ) { |
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| 430 | if ( pos == 0 ) return arg; |
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| 431 | pos--; |
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| 432 | } |
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| 433 | assert( false ); |
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| 434 | } |
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| 435 | } |
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[f1b1e4c] | 436 | |
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[64071c2] | 437 | Expression *& getCallArg( Expression * callExpr, unsigned int pos ) { |
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| 438 | if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( callExpr ) ) { |
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| 439 | return callArg( appExpr, pos ); |
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| 440 | } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * >( callExpr ) ) { |
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| 441 | return callArg( untypedExpr, pos ); |
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[f3b0a07] | 442 | } else if ( TupleAssignExpr * tupleExpr = dynamic_cast< TupleAssignExpr * > ( callExpr ) ) { |
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| 443 | std::list< Statement * > & stmts = tupleExpr->get_stmtExpr()->get_statements()->get_kids(); |
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| 444 | assertf( ! stmts.empty(), "TupleAssignExpr somehow has no statements." ); |
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[e3e16bc] | 445 | ExprStmt * stmt = strict_dynamic_cast< ExprStmt * >( stmts.back() ); |
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| 446 | TupleExpr * tuple = strict_dynamic_cast< TupleExpr * >( stmt->get_expr() ); |
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[f3b0a07] | 447 | assertf( ! tuple->get_exprs().empty(), "TupleAssignExpr somehow has empty tuple expr." ); |
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| 448 | return getCallArg( tuple->get_exprs().front(), pos ); |
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[62a05d1] | 449 | } else if ( ImplicitCopyCtorExpr * copyCtor = dynamic_cast< ImplicitCopyCtorExpr * >( callExpr ) ) { |
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| 450 | return getCallArg( copyCtor->callExpr, pos ); |
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[64071c2] | 451 | } else { |
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[f3b0a07] | 452 | assertf( false, "Unexpected expression type passed to getCallArg: %s", toString( callExpr ).c_str() ); |
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[64071c2] | 453 | } |
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| 454 | } |
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[f1b1e4c] | 455 | |
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[64071c2] | 456 | namespace { |
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[599b386] | 457 | std::string funcName( Expression * func ); |
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| 458 | |
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| 459 | template<typename CallExpr> |
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| 460 | std::string handleDerefName( CallExpr * expr ) { |
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| 461 | // (*f)(x) => should get name "f" |
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| 462 | std::string name = getFunctionName( expr ); |
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| 463 | assertf( name == "*?", "Unexpected untyped expression: %s", name.c_str() ); |
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[b128d3e] | 464 | assertf( ! expr->get_args().empty(), "Cannot get function name from dereference with no arguments" ); |
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[599b386] | 465 | return funcName( expr->get_args().front() ); |
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| 466 | } |
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| 467 | |
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[c738ca4] | 468 | std::string funcName( Expression * func ) { |
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[64071c2] | 469 | if ( NameExpr * nameExpr = dynamic_cast< NameExpr * >( func ) ) { |
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| 470 | return nameExpr->get_name(); |
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| 471 | } else if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( func ) ) { |
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| 472 | return varExpr->get_var()->get_name(); |
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[c738ca4] | 473 | } else if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( func ) ) { |
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| 474 | return funcName( castExpr->get_arg() ); |
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[ee1635c8] | 475 | } else if ( MemberExpr * memberExpr = dynamic_cast< MemberExpr * >( func ) ) { |
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| 476 | return memberExpr->get_member()->get_name(); |
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[96a10cd] | 477 | } else if ( UntypedMemberExpr * memberExpr = dynamic_cast< UntypedMemberExpr * > ( func ) ) { |
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[fd782b2] | 478 | return funcName( memberExpr->get_member() ); |
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[599b386] | 479 | } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * >( func ) ) { |
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| 480 | return handleDerefName( untypedExpr ); |
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| 481 | } else if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( func ) ) { |
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| 482 | return handleDerefName( appExpr ); |
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[19a9822] | 483 | } else if ( ConstructorExpr * ctorExpr = dynamic_cast< ConstructorExpr * >( func ) ) { |
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| 484 | return funcName( getCallArg( ctorExpr->get_callExpr(), 0 ) ); |
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[64071c2] | 485 | } else { |
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[19a9822] | 486 | assertf( false, "Unexpected expression type being called as a function in call expression: %s", toString( func ).c_str() ); |
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[64071c2] | 487 | } |
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| 488 | } |
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| 489 | } |
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[70f89d00] | 490 | |
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[64071c2] | 491 | std::string getFunctionName( Expression * expr ) { |
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[599b386] | 492 | // there's some unforunate overlap here with getCalledFunction. Ideally this would be able to use getCalledFunction and |
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| 493 | // return the name of the DeclarationWithType, but this needs to work for NameExpr and UntypedMemberExpr, where getCalledFunction |
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| 494 | // can't possibly do anything reasonable. |
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[64071c2] | 495 | if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr ) ) { |
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[c738ca4] | 496 | return funcName( appExpr->get_function() ); |
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[64071c2] | 497 | } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * > ( expr ) ) { |
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[c738ca4] | 498 | return funcName( untypedExpr->get_function() ); |
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[64071c2] | 499 | } else { |
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[c738ca4] | 500 | std::cerr << expr << std::endl; |
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[d1969a6] | 501 | assertf( false, "Unexpected expression type passed to getFunctionName" ); |
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[64071c2] | 502 | } |
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| 503 | } |
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[10a7775] | 504 | |
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[64071c2] | 505 | Type * getPointerBase( Type * type ) { |
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| 506 | if ( PointerType * ptrType = dynamic_cast< PointerType * >( type ) ) { |
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| 507 | return ptrType->get_base(); |
---|
| 508 | } else if ( ArrayType * arrayType = dynamic_cast< ArrayType * >( type ) ) { |
---|
| 509 | return arrayType->get_base(); |
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[ce8c12f] | 510 | } else if ( ReferenceType * refType = dynamic_cast< ReferenceType * >( type ) ) { |
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| 511 | return refType->get_base(); |
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[64071c2] | 512 | } else { |
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[22bc276] | 513 | return nullptr; |
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[64071c2] | 514 | } |
---|
| 515 | } |
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[9e1d485] | 516 | const ast::Type* getPointerBase( const ast::Type* t ) { |
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| 517 | if ( const ast::PointerType* p = dynamic_cast< const ast::PointerType* >( t ) ) { |
---|
| 518 | return p->base; |
---|
| 519 | } else if ( const ast::ArrayType* a = dynamic_cast< const ast::ArrayType* >( t ) ) { |
---|
| 520 | return a->base; |
---|
| 521 | } else if ( const ast::ReferenceType* r = dynamic_cast< const ast::ReferenceType* >( t ) ) { |
---|
| 522 | return r->base; |
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| 523 | } else return nullptr; |
---|
| 524 | } |
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[10a7775] | 525 | |
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[64071c2] | 526 | Type * isPointerType( Type * type ) { |
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| 527 | if ( getPointerBase( type ) ) return type; |
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[22bc276] | 528 | else return nullptr; |
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[64071c2] | 529 | } |
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[40e636a] | 530 | |
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[f5c3b6c] | 531 | ApplicationExpr * createBitwiseAssignment( Expression * dst, Expression * src ) { |
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| 532 | static FunctionDecl * assign = nullptr; |
---|
| 533 | if ( ! assign ) { |
---|
| 534 | // temporary? Generate a fake assignment operator to represent bitwise assignments. |
---|
| 535 | // This operator could easily exist as a real function, but it's tricky because nothing should resolve to this function. |
---|
| 536 | TypeDecl * td = new TypeDecl( "T", noStorageClasses, nullptr, TypeDecl::Dtype, true ); |
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| 537 | assign = new FunctionDecl( "?=?", noStorageClasses, LinkageSpec::Intrinsic, SymTab::genAssignType( new TypeInstType( noQualifiers, td->name, td ) ), nullptr ); |
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| 538 | } |
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| 539 | if ( dynamic_cast< ReferenceType * >( dst->result ) ) { |
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[5002738] | 540 | for (int depth = dst->result->referenceDepth(); depth > 0; depth--) { |
---|
| 541 | dst = new AddressExpr( dst ); |
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| 542 | } |
---|
[f5c3b6c] | 543 | } else { |
---|
| 544 | dst = new CastExpr( dst, new ReferenceType( noQualifiers, dst->result->clone() ) ); |
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| 545 | } |
---|
| 546 | if ( dynamic_cast< ReferenceType * >( src->result ) ) { |
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[5002738] | 547 | for (int depth = src->result->referenceDepth(); depth > 0; depth--) { |
---|
| 548 | src = new AddressExpr( src ); |
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| 549 | } |
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[ba89e9b7] | 550 | // src = new CastExpr( src, new ReferenceType( noQualifiers, src->result->stripReferences()->clone() ) ); |
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[f5c3b6c] | 551 | } |
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| 552 | return new ApplicationExpr( VariableExpr::functionPointer( assign ), { dst, src } ); |
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| 553 | } |
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| 554 | |
---|
[c5f3c68] | 555 | struct ConstExprChecker : public WithShortCircuiting { |
---|
| 556 | // most expressions are not const expr |
---|
| 557 | void previsit( Expression * ) { isConstExpr = false; visit_children = false; } |
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[40e636a] | 558 | |
---|
[c5f3c68] | 559 | void previsit( AddressExpr *addressExpr ) { |
---|
| 560 | visit_children = false; |
---|
[65dc863] | 561 | |
---|
[1ba88a0] | 562 | // address of a variable or member expression is constexpr |
---|
| 563 | Expression * arg = addressExpr->get_arg(); |
---|
| 564 | if ( ! dynamic_cast< NameExpr * >( arg) && ! dynamic_cast< VariableExpr * >( arg ) && ! dynamic_cast< MemberExpr * >( arg ) && ! dynamic_cast< UntypedMemberExpr * >( arg ) ) isConstExpr = false; |
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| 565 | } |
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[c5f3c68] | 566 | |
---|
| 567 | // these expressions may be const expr, depending on their children |
---|
| 568 | void previsit( SizeofExpr * ) {} |
---|
| 569 | void previsit( AlignofExpr * ) {} |
---|
| 570 | void previsit( UntypedOffsetofExpr * ) {} |
---|
| 571 | void previsit( OffsetofExpr * ) {} |
---|
| 572 | void previsit( OffsetPackExpr * ) {} |
---|
| 573 | void previsit( AttrExpr * ) {} |
---|
| 574 | void previsit( CommaExpr * ) {} |
---|
| 575 | void previsit( LogicalExpr * ) {} |
---|
| 576 | void previsit( ConditionalExpr * ) {} |
---|
| 577 | void previsit( CastExpr * ) {} |
---|
| 578 | void previsit( ConstantExpr * ) {} |
---|
| 579 | |
---|
[caab997] | 580 | void previsit( VariableExpr * varExpr ) { |
---|
| 581 | visit_children = false; |
---|
| 582 | |
---|
| 583 | if ( EnumInstType * inst = dynamic_cast< EnumInstType * >( varExpr->result ) ) { |
---|
| 584 | long long int value; |
---|
| 585 | if ( inst->baseEnum->valueOf( varExpr->var, value ) ) { |
---|
| 586 | // enumerators are const expr |
---|
| 587 | return; |
---|
| 588 | } |
---|
| 589 | } |
---|
| 590 | isConstExpr = false; |
---|
| 591 | } |
---|
| 592 | |
---|
[c5f3c68] | 593 | bool isConstExpr = true; |
---|
[40e636a] | 594 | }; |
---|
| 595 | |
---|
| 596 | bool isConstExpr( Expression * expr ) { |
---|
| 597 | if ( expr ) { |
---|
[c5f3c68] | 598 | PassVisitor<ConstExprChecker> checker; |
---|
[40e636a] | 599 | expr->accept( checker ); |
---|
[c5f3c68] | 600 | return checker.pass.isConstExpr; |
---|
[40e636a] | 601 | } |
---|
| 602 | return true; |
---|
| 603 | } |
---|
| 604 | |
---|
| 605 | bool isConstExpr( Initializer * init ) { |
---|
| 606 | if ( init ) { |
---|
[c5f3c68] | 607 | PassVisitor<ConstExprChecker> checker; |
---|
[40e636a] | 608 | init->accept( checker ); |
---|
[c5f3c68] | 609 | return checker.pass.isConstExpr; |
---|
[40e636a] | 610 | } // if |
---|
| 611 | // for all intents and purposes, no initializer means const expr |
---|
| 612 | return true; |
---|
| 613 | } |
---|
| 614 | |
---|
[79970ed] | 615 | bool isConstructor( const std::string & str ) { return str == "?{}"; } |
---|
| 616 | bool isDestructor( const std::string & str ) { return str == "^?{}"; } |
---|
[ee1635c8] | 617 | bool isAssignment( const std::string & str ) { return str == "?=?"; } |
---|
[79970ed] | 618 | bool isCtorDtor( const std::string & str ) { return isConstructor( str ) || isDestructor( str ); } |
---|
[ee1635c8] | 619 | bool isCtorDtorAssign( const std::string & str ) { return isCtorDtor( str ) || isAssignment( str ); } |
---|
[4d4882a] | 620 | |
---|
[ee1635c8] | 621 | FunctionDecl * isCopyFunction( Declaration * decl, const std::string & fname ) { |
---|
[4d4882a] | 622 | FunctionDecl * function = dynamic_cast< FunctionDecl * >( decl ); |
---|
[0a267c1] | 623 | if ( ! function ) return nullptr; |
---|
| 624 | if ( function->name != fname ) return nullptr; |
---|
| 625 | FunctionType * ftype = function->type; |
---|
| 626 | if ( ftype->parameters.size() != 2 ) return nullptr; |
---|
[4d4882a] | 627 | |
---|
[ce8c12f] | 628 | Type * t1 = getPointerBase( ftype->get_parameters().front()->get_type() ); |
---|
[0a267c1] | 629 | Type * t2 = ftype->parameters.back()->get_type(); |
---|
[ce8c12f] | 630 | assert( t1 ); |
---|
[4d4882a] | 631 | |
---|
[ce8c12f] | 632 | if ( ResolvExpr::typesCompatibleIgnoreQualifiers( t1, t2, SymTab::Indexer() ) ) { |
---|
[4d4882a] | 633 | return function; |
---|
| 634 | } else { |
---|
[ee1635c8] | 635 | return nullptr; |
---|
[4d4882a] | 636 | } |
---|
| 637 | } |
---|
[ee1635c8] | 638 | |
---|
[207c7e1d] | 639 | FunctionDecl * isAssignment( Declaration * decl ) { |
---|
| 640 | return isCopyFunction( decl, "?=?" ); |
---|
| 641 | } |
---|
| 642 | FunctionDecl * isDestructor( Declaration * decl ) { |
---|
| 643 | if ( isDestructor( decl->get_name() ) ) { |
---|
| 644 | return dynamic_cast< FunctionDecl * >( decl ); |
---|
| 645 | } |
---|
| 646 | return nullptr; |
---|
| 647 | } |
---|
| 648 | FunctionDecl * isDefaultConstructor( Declaration * decl ) { |
---|
[0a267c1] | 649 | if ( isConstructor( decl->name ) ) { |
---|
[207c7e1d] | 650 | if ( FunctionDecl * func = dynamic_cast< FunctionDecl * >( decl ) ) { |
---|
[0a267c1] | 651 | if ( func->type->parameters.size() == 1 ) { |
---|
[207c7e1d] | 652 | return func; |
---|
| 653 | } |
---|
| 654 | } |
---|
| 655 | } |
---|
| 656 | return nullptr; |
---|
| 657 | } |
---|
[ee1635c8] | 658 | FunctionDecl * isCopyConstructor( Declaration * decl ) { |
---|
| 659 | return isCopyFunction( decl, "?{}" ); |
---|
| 660 | } |
---|
[2b46a13] | 661 | } |
---|