[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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| 7 | #include "Common/SemanticError.h" // for SemanticError |
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| 8 | #include "Common/UniqueName.h" // for UniqueName |
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| 9 | #include "Common/utility.h" // for toString, deleteAll, maybeClone |
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| 10 | #include "GenPoly/GenPoly.h" // for getFunctionType |
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[2b46a13] | 11 | #include "InitTweak.h" |
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[d180746] | 12 | #include "Parser/LinkageSpec.h" // for Spec, isBuiltin, Intrinsic |
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| 13 | #include "ResolvExpr/typeops.h" // for typesCompatibleIgnoreQualifiers |
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| 14 | #include "SymTab/Indexer.h" // for Indexer |
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| 15 | #include "SynTree/Attribute.h" // for Attribute |
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| 16 | #include "SynTree/Constant.h" // for Constant |
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| 17 | #include "SynTree/Declaration.h" // for ObjectDecl, DeclarationWithType |
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| 18 | #include "SynTree/Expression.h" // for Expression, UntypedExpr, Applicati... |
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| 19 | #include "SynTree/Initializer.h" // for Initializer, ListInit, Designation |
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| 20 | #include "SynTree/Label.h" // for Label, noLabels |
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| 21 | #include "SynTree/Statement.h" // for CompoundStmt, ExprStmt, BranchStmt |
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| 22 | #include "SynTree/Type.h" // for FunctionType, ArrayType, PointerType |
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| 23 | #include "SynTree/Visitor.h" // for Visitor, maybeAccept |
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[29bc63e] | 24 | #include "Tuples/Tuples.h" // for Tuples::isTtype |
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[d180746] | 25 | |
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| 26 | class UntypedValofExpr; |
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[2b46a13] | 27 | |
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| 28 | namespace InitTweak { |
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[64071c2] | 29 | namespace { |
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| 30 | class HasDesignations : public Visitor { |
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| 31 | public: |
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| 32 | bool hasDesignations = false; |
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[e4d829b] | 33 | virtual void visit( Designation * des ) { |
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| 34 | if ( ! des->get_designators().empty() ) hasDesignations = true; |
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| 35 | else Visitor::visit( des ); |
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[64071c2] | 36 | } |
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| 37 | }; |
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[2b46a13] | 38 | |
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[dcd73d1] | 39 | class InitDepthChecker : public Visitor { |
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| 40 | public: |
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| 41 | bool depthOkay = true; |
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| 42 | Type * type; |
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| 43 | int curDepth = 0, maxDepth = 0; |
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| 44 | InitDepthChecker( Type * type ) : type( type ) { |
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| 45 | Type * t = type; |
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| 46 | while ( ArrayType * at = dynamic_cast< ArrayType * >( t ) ) { |
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| 47 | maxDepth++; |
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| 48 | t = at->get_base(); |
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| 49 | } |
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| 50 | maxDepth++; |
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| 51 | } |
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| 52 | virtual void visit( ListInit * listInit ) { |
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| 53 | curDepth++; |
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| 54 | if ( curDepth > maxDepth ) depthOkay = false; |
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| 55 | Visitor::visit( listInit ); |
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| 56 | curDepth--; |
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| 57 | } |
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| 58 | }; |
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| 59 | |
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[4d2434a] | 60 | class InitFlattener : public Visitor { |
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[64071c2] | 61 | public: |
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| 62 | virtual void visit( SingleInit * singleInit ); |
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| 63 | virtual void visit( ListInit * listInit ); |
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| 64 | std::list< Expression * > argList; |
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| 65 | }; |
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[2b46a13] | 66 | |
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[4d2434a] | 67 | void InitFlattener::visit( SingleInit * singleInit ) { |
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[64071c2] | 68 | argList.push_back( singleInit->get_value()->clone() ); |
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| 69 | } |
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[2b46a13] | 70 | |
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[4d2434a] | 71 | void InitFlattener::visit( ListInit * listInit ) { |
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| 72 | // flatten nested list inits |
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| 73 | std::list<Initializer*>::iterator it = listInit->begin(); |
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| 74 | for ( ; it != listInit->end(); ++it ) { |
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[64071c2] | 75 | (*it)->accept( *this ); |
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| 76 | } |
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| 77 | } |
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| 78 | } |
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[2b46a13] | 79 | |
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[64071c2] | 80 | std::list< Expression * > makeInitList( Initializer * init ) { |
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[4d2434a] | 81 | InitFlattener flattener; |
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| 82 | maybeAccept( init, flattener ); |
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| 83 | return flattener.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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| 87 | HasDesignations finder; |
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| 88 | maybeAccept( init, finder ); |
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| 89 | return finder.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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| 93 | InitDepthChecker checker( objDecl->get_type() ); |
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| 94 | maybeAccept( objDecl->get_init(), checker ); |
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| 95 | return checker.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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| 100 | virtual std::list< Expression * > next( std::list< Expression * > & indices ) = 0; |
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[4d2434a] | 101 | virtual Statement * buildListInit( UntypedExpr * callExpr, std::list< Expression * > & indices ) = 0; |
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[39f84a4] | 102 | }; |
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| 103 | |
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| 104 | class InitImpl : public InitExpander::ExpanderImpl { |
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| 105 | public: |
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[4d2434a] | 106 | InitImpl( Initializer * init ) : init( init ) {} |
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[39f84a4] | 107 | |
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[7e003011] | 108 | virtual std::list< Expression * > next( __attribute((unused)) std::list< Expression * > & indices ) { |
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[39f84a4] | 109 | // this is wrong, but just a placeholder for now |
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[4d2434a] | 110 | // if ( ! flattened ) flatten( indices ); |
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| 111 | // return ! inits.empty() ? makeInitList( inits.front() ) : std::list< Expression * >(); |
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| 112 | return makeInitList( init ); |
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[39f84a4] | 113 | } |
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[4d2434a] | 114 | |
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| 115 | virtual Statement * buildListInit( UntypedExpr * callExpr, std::list< Expression * > & indices ); |
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[39f84a4] | 116 | private: |
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[4d2434a] | 117 | Initializer * init; |
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[39f84a4] | 118 | }; |
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| 119 | |
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| 120 | class ExprImpl : public InitExpander::ExpanderImpl { |
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| 121 | public: |
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| 122 | ExprImpl( Expression * expr ) : arg( expr ) {} |
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| 123 | |
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[9b4c936] | 124 | ~ExprImpl() { delete arg; } |
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| 125 | |
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[39f84a4] | 126 | virtual std::list< Expression * > next( std::list< Expression * > & indices ) { |
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| 127 | std::list< Expression * > ret; |
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| 128 | Expression * expr = maybeClone( arg ); |
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| 129 | if ( expr ) { |
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| 130 | for ( std::list< Expression * >::reverse_iterator it = indices.rbegin(); it != indices.rend(); ++it ) { |
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| 131 | // go through indices and layer on subscript exprs ?[?] |
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| 132 | ++it; |
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| 133 | UntypedExpr * subscriptExpr = new UntypedExpr( new NameExpr( "?[?]") ); |
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| 134 | subscriptExpr->get_args().push_back( expr ); |
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| 135 | subscriptExpr->get_args().push_back( (*it)->clone() ); |
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| 136 | expr = subscriptExpr; |
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| 137 | } |
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| 138 | ret.push_back( expr ); |
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| 139 | } |
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| 140 | return ret; |
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| 141 | } |
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[4d2434a] | 142 | |
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| 143 | virtual Statement * buildListInit( UntypedExpr * callExpr, std::list< Expression * > & indices ); |
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[39f84a4] | 144 | private: |
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| 145 | Expression * arg; |
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| 146 | }; |
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| 147 | |
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| 148 | InitExpander::InitExpander( Initializer * init ) : expander( new InitImpl( init ) ) {} |
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| 149 | |
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| 150 | InitExpander::InitExpander( Expression * expr ) : expander( new ExprImpl( expr ) ) {} |
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| 151 | |
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| 152 | std::list< Expression * > InitExpander::operator*() { |
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| 153 | return cur; |
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| 154 | } |
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| 155 | |
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| 156 | InitExpander & InitExpander::operator++() { |
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| 157 | cur = expander->next( indices ); |
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| 158 | return *this; |
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| 159 | } |
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| 160 | |
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| 161 | // use array indices list to build switch statement |
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| 162 | void InitExpander::addArrayIndex( Expression * index, Expression * dimension ) { |
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| 163 | indices.push_back( index ); |
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| 164 | indices.push_back( dimension ); |
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| 165 | } |
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| 166 | |
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[4d2434a] | 167 | void InitExpander::clearArrayIndices() { |
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[9b4c936] | 168 | deleteAll( indices ); |
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[4d2434a] | 169 | indices.clear(); |
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| 170 | } |
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| 171 | |
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| 172 | namespace { |
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[f9cebb5] | 173 | /// given index i, dimension d, initializer init, and callExpr f, generates |
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| 174 | /// if (i < d) f(..., init) |
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| 175 | /// ++i; |
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| 176 | /// so that only elements within the range of the array are constructed |
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[4d2434a] | 177 | template< typename OutIterator > |
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[f9cebb5] | 178 | void buildCallExpr( UntypedExpr * callExpr, Expression * index, Expression * dimension, Initializer * init, OutIterator out ) { |
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[4d2434a] | 179 | UntypedExpr * cond = new UntypedExpr( new NameExpr( "?<?") ); |
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| 180 | cond->get_args().push_back( index->clone() ); |
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| 181 | cond->get_args().push_back( dimension->clone() ); |
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| 182 | |
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| 183 | std::list< Expression * > args = makeInitList( init ); |
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| 184 | callExpr->get_args().splice( callExpr->get_args().end(), args ); |
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| 185 | |
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[22bc276] | 186 | *out++ = new IfStmt( noLabels, cond, new ExprStmt( noLabels, callExpr ), nullptr ); |
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[4d2434a] | 187 | |
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| 188 | UntypedExpr * increment = new UntypedExpr( new NameExpr( "++?" ) ); |
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[175ad32] | 189 | increment->get_args().push_back( index->clone() ); |
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[4d2434a] | 190 | *out++ = new ExprStmt( noLabels, increment ); |
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| 191 | } |
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| 192 | |
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| 193 | template< typename OutIterator > |
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| 194 | void build( UntypedExpr * callExpr, InitExpander::IndexList::iterator idx, InitExpander::IndexList::iterator idxEnd, Initializer * init, OutIterator out ) { |
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| 195 | if ( idx == idxEnd ) return; |
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| 196 | Expression * index = *idx++; |
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| 197 | assert( idx != idxEnd ); |
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| 198 | Expression * dimension = *idx++; |
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| 199 | |
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[f9cebb5] | 200 | // xxx - may want to eventually issue a warning here if we can detect |
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| 201 | // that the number of elements exceeds to dimension of the array |
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[4d2434a] | 202 | if ( idx == idxEnd ) { |
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| 203 | if ( ListInit * listInit = dynamic_cast< ListInit * >( init ) ) { |
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| 204 | for ( Initializer * init : *listInit ) { |
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[f9cebb5] | 205 | buildCallExpr( callExpr->clone(), index, dimension, init, out ); |
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[4d2434a] | 206 | } |
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| 207 | } else { |
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[f9cebb5] | 208 | buildCallExpr( callExpr->clone(), index, dimension, init, out ); |
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[4d2434a] | 209 | } |
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| 210 | } else { |
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| 211 | std::list< Statement * > branches; |
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| 212 | |
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| 213 | unsigned long cond = 0; |
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| 214 | ListInit * listInit = dynamic_cast< ListInit * >( init ); |
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| 215 | if ( ! listInit ) { |
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| 216 | // xxx - this shouldn't be an error, but need a way to |
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| 217 | // terminate without creating output, so should catch this error |
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| 218 | throw SemanticError( "unbalanced list initializers" ); |
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| 219 | } |
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[f9cebb5] | 220 | |
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| 221 | static UniqueName targetLabel( "L__autogen__" ); |
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| 222 | Label switchLabel( targetLabel.newName(), 0, std::list< Attribute * >{ new Attribute("unused") } ); |
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[4d2434a] | 223 | for ( Initializer * init : *listInit ) { |
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| 224 | Expression * condition; |
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| 225 | // check for designations |
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| 226 | // if ( init-> ) { |
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| 227 | condition = new ConstantExpr( Constant::from_ulong( cond ) ); |
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| 228 | ++cond; |
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| 229 | // } else { |
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| 230 | // condition = // ... take designation |
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| 231 | // cond = // ... take designation+1 |
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| 232 | // } |
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| 233 | std::list< Statement * > stmts; |
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| 234 | build( callExpr, idx, idxEnd, init, back_inserter( stmts ) ); |
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[f9cebb5] | 235 | stmts.push_back( new BranchStmt( noLabels, switchLabel, BranchStmt::Break ) ); |
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[4d2434a] | 236 | CaseStmt * caseStmt = new CaseStmt( noLabels, condition, stmts ); |
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| 237 | branches.push_back( caseStmt ); |
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| 238 | } |
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| 239 | *out++ = new SwitchStmt( noLabels, index->clone(), branches ); |
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[f9cebb5] | 240 | *out++ = new NullStmt( std::list<Label>{ switchLabel } ); |
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[4d2434a] | 241 | } |
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| 242 | } |
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| 243 | } |
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| 244 | |
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| 245 | // if array came with an initializer list: initialize each element |
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| 246 | // may have more initializers than elements in the array - need to check at each index that |
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| 247 | // we haven't exceeded size. |
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| 248 | // may have fewer initializers than elements in the array - need to default construct |
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| 249 | // remaining elements. |
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| 250 | // To accomplish this, generate switch statement, consuming all of expander's elements |
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| 251 | Statement * InitImpl::buildListInit( UntypedExpr * dst, std::list< Expression * > & indices ) { |
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[22bc276] | 252 | if ( ! init ) return nullptr; |
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[f9cebb5] | 253 | CompoundStmt * block = new CompoundStmt( noLabels ); |
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| 254 | build( dst, indices.begin(), indices.end(), init, back_inserter( block->get_kids() ) ); |
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| 255 | if ( block->get_kids().empty() ) { |
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| 256 | delete block; |
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[22bc276] | 257 | return nullptr; |
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[4d2434a] | 258 | } else { |
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[22bc276] | 259 | init = nullptr; // init was consumed in creating the list init |
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[f9cebb5] | 260 | return block; |
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[4d2434a] | 261 | } |
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[39f84a4] | 262 | } |
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| 263 | |
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[22bc276] | 264 | Statement * ExprImpl::buildListInit( UntypedExpr *, std::list< Expression * > & ) { |
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| 265 | return nullptr; |
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[4d2434a] | 266 | } |
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| 267 | |
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| 268 | Statement * InitExpander::buildListInit( UntypedExpr * dst ) { |
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| 269 | return expander->buildListInit( dst, indices ); |
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| 270 | } |
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| 271 | |
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[7fc7cdb] | 272 | Type * getThisType( FunctionType * ftype ) { |
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| 273 | assertf( ftype, "getThisType: nullptr ftype" ); |
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| 274 | ObjectDecl * thisParam = getThisParam( ftype ); |
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| 275 | ReferenceType * refType = strict_dynamic_cast< ReferenceType * >( thisParam->type ); |
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| 276 | return refType->base; |
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| 277 | } |
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| 278 | |
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| 279 | ObjectDecl * getThisParam( FunctionType * ftype ) { |
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| 280 | assertf( ftype, "getThisParam: nullptr ftype" ); |
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| 281 | auto & params = ftype->parameters; |
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| 282 | assertf( ! params.empty(), "getThisParam: ftype with 0 parameters: %s", toString( ftype ).c_str() ); |
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| 283 | return strict_dynamic_cast< ObjectDecl * >( params.front() ); |
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| 284 | } |
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| 285 | |
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[22bc276] | 286 | bool tryConstruct( DeclarationWithType * dwt ) { |
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| 287 | ObjectDecl * objDecl = dynamic_cast< ObjectDecl * >( dwt ); |
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| 288 | if ( ! objDecl ) return false; |
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[64071c2] | 289 | return ! LinkageSpec::isBuiltin( objDecl->get_linkage() ) && |
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[22bc276] | 290 | (objDecl->get_init() == nullptr || |
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| 291 | ( objDecl->get_init() != nullptr && objDecl->get_init()->get_maybeConstructed() )) |
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| 292 | && ! objDecl->get_storageClasses().is_extern |
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[29bc63e] | 293 | && isConstructable( objDecl->type ); |
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| 294 | } |
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| 295 | |
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| 296 | bool isConstructable( Type * type ) { |
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| 297 | return ! dynamic_cast< VarArgsType * >( type ) && ! dynamic_cast< ReferenceType * >( type ) && ! dynamic_cast< FunctionType * >( type ) && ! Tuples::isTtype( type ); |
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[64071c2] | 298 | } |
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[2b46a13] | 299 | |
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[4d2434a] | 300 | class CallFinder : public Visitor { |
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| 301 | public: |
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| 302 | typedef Visitor Parent; |
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| 303 | CallFinder( const std::list< std::string > & names ) : names( names ) {} |
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| 304 | |
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| 305 | virtual void visit( ApplicationExpr * appExpr ) { |
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| 306 | handleCallExpr( appExpr ); |
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| 307 | } |
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| 308 | |
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| 309 | virtual void visit( UntypedExpr * untypedExpr ) { |
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| 310 | handleCallExpr( untypedExpr ); |
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| 311 | } |
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| 312 | |
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| 313 | std::list< Expression * > * matches; |
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| 314 | private: |
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| 315 | const std::list< std::string > names; |
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| 316 | |
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| 317 | template< typename CallExpr > |
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| 318 | void handleCallExpr( CallExpr * expr ) { |
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| 319 | Parent::visit( expr ); |
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| 320 | std::string fname = getFunctionName( expr ); |
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| 321 | if ( std::find( names.begin(), names.end(), fname ) != names.end() ) { |
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| 322 | matches->push_back( expr ); |
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[cad355a] | 323 | } |
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[64071c2] | 324 | } |
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[4d2434a] | 325 | }; |
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| 326 | |
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| 327 | void collectCtorDtorCalls( Statement * stmt, std::list< Expression * > & matches ) { |
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| 328 | static CallFinder finder( std::list< std::string >{ "?{}", "^?{}" } ); |
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| 329 | finder.matches = &matches; |
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| 330 | maybeAccept( stmt, finder ); |
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[64071c2] | 331 | } |
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[4d2434a] | 332 | |
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| 333 | Expression * getCtorDtorCall( Statement * stmt ) { |
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| 334 | std::list< Expression * > matches; |
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| 335 | collectCtorDtorCalls( stmt, matches ); |
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| 336 | assert( matches.size() <= 1 ); |
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[22bc276] | 337 | return matches.size() == 1 ? matches.front() : nullptr; |
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[4d2434a] | 338 | } |
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| 339 | |
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[aedfd91] | 340 | namespace { |
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[599b386] | 341 | DeclarationWithType * getCalledFunction( Expression * expr ); |
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| 342 | |
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| 343 | template<typename CallExpr> |
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| 344 | DeclarationWithType * handleDerefCalledFunction( CallExpr * expr ) { |
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| 345 | // (*f)(x) => should get "f" |
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| 346 | std::string name = getFunctionName( expr ); |
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| 347 | assertf( name == "*?", "Unexpected untyped expression: %s", name.c_str() ); |
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[b128d3e] | 348 | assertf( ! expr->get_args().empty(), "Cannot get called function from dereference with no arguments" ); |
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[599b386] | 349 | return getCalledFunction( expr->get_args().front() ); |
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| 350 | } |
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| 351 | |
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[ee1635c8] | 352 | DeclarationWithType * getCalledFunction( Expression * expr ) { |
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| 353 | assert( expr ); |
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| 354 | if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( expr ) ) { |
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| 355 | return varExpr->get_var(); |
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| 356 | } else if ( MemberExpr * memberExpr = dynamic_cast< MemberExpr * >( expr ) ) { |
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| 357 | return memberExpr->get_member(); |
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| 358 | } else if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( expr ) ) { |
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| 359 | return getCalledFunction( castExpr->get_arg() ); |
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[599b386] | 360 | } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * >( expr ) ) { |
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| 361 | return handleDerefCalledFunction( untypedExpr ); |
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| 362 | } else if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * > ( expr ) ) { |
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| 363 | return handleDerefCalledFunction( appExpr ); |
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[f3b0a07] | 364 | } else if ( AddressExpr * addrExpr = dynamic_cast< AddressExpr * >( expr ) ) { |
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| 365 | return getCalledFunction( addrExpr->get_arg() ); |
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[ee1635c8] | 366 | } |
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| 367 | return nullptr; |
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[aedfd91] | 368 | } |
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| 369 | } |
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[70f89d00] | 370 | |
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[b7b8674] | 371 | DeclarationWithType * getFunction( Expression * expr ) { |
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| 372 | if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr ) ) { |
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| 373 | return getCalledFunction( appExpr->get_function() ); |
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| 374 | } else if ( UntypedExpr * untyped = dynamic_cast< UntypedExpr * > ( expr ) ) { |
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| 375 | return getCalledFunction( untyped->get_function() ); |
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| 376 | } |
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| 377 | assertf( false, "getFunction received unknown expression: %s", toString( expr ).c_str() ); |
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| 378 | } |
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| 379 | |
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[aedfd91] | 380 | ApplicationExpr * isIntrinsicCallExpr( Expression * expr ) { |
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| 381 | ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr ); |
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[22bc276] | 382 | if ( ! appExpr ) return nullptr; |
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[ee1635c8] | 383 | DeclarationWithType * function = getCalledFunction( appExpr->get_function() ); |
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[f3b0a07] | 384 | assertf( function, "getCalledFunction returned nullptr: %s", toString( appExpr->get_function() ).c_str() ); |
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[64071c2] | 385 | // check for Intrinsic only - don't want to remove all overridable ctor/dtors because autogenerated ctor/dtor |
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| 386 | // will call all member dtors, and some members may have a user defined dtor. |
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[22bc276] | 387 | return function->get_linkage() == LinkageSpec::Intrinsic ? appExpr : nullptr; |
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[aedfd91] | 388 | } |
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| 389 | |
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[a465caf] | 390 | namespace { |
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| 391 | template <typename Predicate> |
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| 392 | bool allofCtorDtor( Statement * stmt, const Predicate & pred ) { |
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| 393 | std::list< Expression * > callExprs; |
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| 394 | collectCtorDtorCalls( stmt, callExprs ); |
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| 395 | // if ( callExprs.empty() ) return false; // xxx - do I still need this check? |
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| 396 | return std::all_of( callExprs.begin(), callExprs.end(), pred); |
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| 397 | } |
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| 398 | } |
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| 399 | |
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[f9cebb5] | 400 | bool isIntrinsicSingleArgCallStmt( Statement * stmt ) { |
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[a465caf] | 401 | return allofCtorDtor( stmt, []( Expression * callExpr ){ |
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[4d2434a] | 402 | if ( ApplicationExpr * appExpr = isIntrinsicCallExpr( callExpr ) ) { |
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[906e24d] | 403 | FunctionType *funcType = GenPoly::getFunctionType( appExpr->get_function()->get_result() ); |
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[4d2434a] | 404 | assert( funcType ); |
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| 405 | return funcType->get_parameters().size() == 1; |
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| 406 | } |
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| 407 | return false; |
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| 408 | }); |
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[64071c2] | 409 | } |
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[f1b1e4c] | 410 | |
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[a465caf] | 411 | bool isIntrinsicCallStmt( Statement * stmt ) { |
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| 412 | return allofCtorDtor( stmt, []( Expression * callExpr ) { |
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| 413 | return isIntrinsicCallExpr( callExpr ); |
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| 414 | }); |
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| 415 | } |
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| 416 | |
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[64071c2] | 417 | namespace { |
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| 418 | template<typename CallExpr> |
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| 419 | Expression *& callArg( CallExpr * callExpr, unsigned int pos ) { |
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[a61ad31] | 420 | 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] | 421 | for ( Expression *& arg : callExpr->get_args() ) { |
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| 422 | if ( pos == 0 ) return arg; |
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| 423 | pos--; |
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| 424 | } |
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| 425 | assert( false ); |
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| 426 | } |
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| 427 | } |
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[f1b1e4c] | 428 | |
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[64071c2] | 429 | Expression *& getCallArg( Expression * callExpr, unsigned int pos ) { |
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| 430 | if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( callExpr ) ) { |
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| 431 | return callArg( appExpr, pos ); |
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| 432 | } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * >( callExpr ) ) { |
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| 433 | return callArg( untypedExpr, pos ); |
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[f3b0a07] | 434 | } else if ( TupleAssignExpr * tupleExpr = dynamic_cast< TupleAssignExpr * > ( callExpr ) ) { |
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| 435 | std::list< Statement * > & stmts = tupleExpr->get_stmtExpr()->get_statements()->get_kids(); |
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| 436 | assertf( ! stmts.empty(), "TupleAssignExpr somehow has no statements." ); |
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[e3e16bc] | 437 | ExprStmt * stmt = strict_dynamic_cast< ExprStmt * >( stmts.back() ); |
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| 438 | TupleExpr * tuple = strict_dynamic_cast< TupleExpr * >( stmt->get_expr() ); |
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[f3b0a07] | 439 | assertf( ! tuple->get_exprs().empty(), "TupleAssignExpr somehow has empty tuple expr." ); |
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| 440 | return getCallArg( tuple->get_exprs().front(), pos ); |
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[62a05d1] | 441 | } else if ( ImplicitCopyCtorExpr * copyCtor = dynamic_cast< ImplicitCopyCtorExpr * >( callExpr ) ) { |
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| 442 | return getCallArg( copyCtor->callExpr, pos ); |
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[64071c2] | 443 | } else { |
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[f3b0a07] | 444 | assertf( false, "Unexpected expression type passed to getCallArg: %s", toString( callExpr ).c_str() ); |
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[64071c2] | 445 | } |
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| 446 | } |
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[f1b1e4c] | 447 | |
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[64071c2] | 448 | namespace { |
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[599b386] | 449 | std::string funcName( Expression * func ); |
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| 450 | |
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| 451 | template<typename CallExpr> |
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| 452 | std::string handleDerefName( CallExpr * expr ) { |
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| 453 | // (*f)(x) => should get name "f" |
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| 454 | std::string name = getFunctionName( expr ); |
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| 455 | assertf( name == "*?", "Unexpected untyped expression: %s", name.c_str() ); |
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[b128d3e] | 456 | assertf( ! expr->get_args().empty(), "Cannot get function name from dereference with no arguments" ); |
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[599b386] | 457 | return funcName( expr->get_args().front() ); |
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| 458 | } |
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| 459 | |
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[c738ca4] | 460 | std::string funcName( Expression * func ) { |
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[64071c2] | 461 | if ( NameExpr * nameExpr = dynamic_cast< NameExpr * >( func ) ) { |
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| 462 | return nameExpr->get_name(); |
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| 463 | } else if ( VariableExpr * varExpr = dynamic_cast< VariableExpr * >( func ) ) { |
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| 464 | return varExpr->get_var()->get_name(); |
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[c738ca4] | 465 | } else if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( func ) ) { |
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| 466 | return funcName( castExpr->get_arg() ); |
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[ee1635c8] | 467 | } else if ( MemberExpr * memberExpr = dynamic_cast< MemberExpr * >( func ) ) { |
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| 468 | return memberExpr->get_member()->get_name(); |
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[96a10cd] | 469 | } else if ( UntypedMemberExpr * memberExpr = dynamic_cast< UntypedMemberExpr * > ( func ) ) { |
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[fd782b2] | 470 | return funcName( memberExpr->get_member() ); |
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[599b386] | 471 | } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * >( func ) ) { |
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| 472 | return handleDerefName( untypedExpr ); |
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| 473 | } else if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( func ) ) { |
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| 474 | return handleDerefName( appExpr ); |
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[19a9822] | 475 | } else if ( ConstructorExpr * ctorExpr = dynamic_cast< ConstructorExpr * >( func ) ) { |
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| 476 | return funcName( getCallArg( ctorExpr->get_callExpr(), 0 ) ); |
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[64071c2] | 477 | } else { |
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[19a9822] | 478 | assertf( false, "Unexpected expression type being called as a function in call expression: %s", toString( func ).c_str() ); |
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[64071c2] | 479 | } |
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| 480 | } |
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| 481 | } |
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[70f89d00] | 482 | |
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[64071c2] | 483 | std::string getFunctionName( Expression * expr ) { |
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[599b386] | 484 | // there's some unforunate overlap here with getCalledFunction. Ideally this would be able to use getCalledFunction and |
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| 485 | // return the name of the DeclarationWithType, but this needs to work for NameExpr and UntypedMemberExpr, where getCalledFunction |
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| 486 | // can't possibly do anything reasonable. |
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[64071c2] | 487 | if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr ) ) { |
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[c738ca4] | 488 | return funcName( appExpr->get_function() ); |
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[64071c2] | 489 | } else if ( UntypedExpr * untypedExpr = dynamic_cast< UntypedExpr * > ( expr ) ) { |
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[c738ca4] | 490 | return funcName( untypedExpr->get_function() ); |
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[64071c2] | 491 | } else { |
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[c738ca4] | 492 | std::cerr << expr << std::endl; |
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[d1969a6] | 493 | assertf( false, "Unexpected expression type passed to getFunctionName" ); |
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[64071c2] | 494 | } |
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| 495 | } |
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[10a7775] | 496 | |
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[64071c2] | 497 | Type * getPointerBase( Type * type ) { |
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| 498 | if ( PointerType * ptrType = dynamic_cast< PointerType * >( type ) ) { |
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| 499 | return ptrType->get_base(); |
---|
| 500 | } else if ( ArrayType * arrayType = dynamic_cast< ArrayType * >( type ) ) { |
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| 501 | return arrayType->get_base(); |
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[ce8c12f] | 502 | } else if ( ReferenceType * refType = dynamic_cast< ReferenceType * >( type ) ) { |
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| 503 | return refType->get_base(); |
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[64071c2] | 504 | } else { |
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[22bc276] | 505 | return nullptr; |
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[64071c2] | 506 | } |
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| 507 | } |
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[10a7775] | 508 | |
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[64071c2] | 509 | Type * isPointerType( Type * type ) { |
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| 510 | if ( getPointerBase( type ) ) return type; |
---|
[22bc276] | 511 | else return nullptr; |
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[64071c2] | 512 | } |
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[40e636a] | 513 | |
---|
| 514 | class ConstExprChecker : public Visitor { |
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| 515 | public: |
---|
| 516 | ConstExprChecker() : isConstExpr( true ) {} |
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| 517 | |
---|
[65dc863] | 518 | using Visitor::visit; |
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| 519 | |
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[5809461] | 520 | virtual void visit( ApplicationExpr * ) { isConstExpr = false; } |
---|
| 521 | virtual void visit( UntypedExpr * ) { isConstExpr = false; } |
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| 522 | virtual void visit( NameExpr * ) { isConstExpr = false; } |
---|
[1ba88a0] | 523 | // virtual void visit( CastExpr *castExpr ) { isConstExpr = false; } |
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| 524 | virtual void visit( AddressExpr *addressExpr ) { |
---|
| 525 | // address of a variable or member expression is constexpr |
---|
| 526 | Expression * arg = addressExpr->get_arg(); |
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| 527 | if ( ! dynamic_cast< NameExpr * >( arg) && ! dynamic_cast< VariableExpr * >( arg ) && ! dynamic_cast< MemberExpr * >( arg ) && ! dynamic_cast< UntypedMemberExpr * >( arg ) ) isConstExpr = false; |
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| 528 | } |
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[5809461] | 529 | virtual void visit( UntypedMemberExpr * ) { isConstExpr = false; } |
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| 530 | virtual void visit( MemberExpr * ) { isConstExpr = false; } |
---|
| 531 | virtual void visit( VariableExpr * ) { isConstExpr = false; } |
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[40e636a] | 532 | // these might be okay? |
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| 533 | // virtual void visit( SizeofExpr *sizeofExpr ); |
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| 534 | // virtual void visit( AlignofExpr *alignofExpr ); |
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| 535 | // virtual void visit( UntypedOffsetofExpr *offsetofExpr ); |
---|
| 536 | // virtual void visit( OffsetofExpr *offsetofExpr ); |
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| 537 | // virtual void visit( OffsetPackExpr *offsetPackExpr ); |
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| 538 | // virtual void visit( AttrExpr *attrExpr ); |
---|
| 539 | // virtual void visit( CommaExpr *commaExpr ); |
---|
| 540 | // virtual void visit( LogicalExpr *logicalExpr ); |
---|
| 541 | // virtual void visit( ConditionalExpr *conditionalExpr ); |
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[5809461] | 542 | virtual void visit( TypeExpr * ) { isConstExpr = false; } |
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| 543 | virtual void visit( AsmExpr * ) { isConstExpr = false; } |
---|
| 544 | virtual void visit( UntypedValofExpr * ) { isConstExpr = false; } |
---|
| 545 | virtual void visit( CompoundLiteralExpr * ) { isConstExpr = false; } |
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| 546 | virtual void visit( UntypedTupleExpr * ) { isConstExpr = false; } |
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| 547 | virtual void visit( TupleExpr * ) { isConstExpr = false; } |
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| 548 | virtual void visit( TupleAssignExpr * ) { isConstExpr = false; } |
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[40e636a] | 549 | |
---|
| 550 | bool isConstExpr; |
---|
| 551 | }; |
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| 552 | |
---|
| 553 | bool isConstExpr( Expression * expr ) { |
---|
| 554 | if ( expr ) { |
---|
| 555 | ConstExprChecker checker; |
---|
| 556 | expr->accept( checker ); |
---|
| 557 | return checker.isConstExpr; |
---|
| 558 | } |
---|
| 559 | return true; |
---|
| 560 | } |
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| 561 | |
---|
| 562 | bool isConstExpr( Initializer * init ) { |
---|
| 563 | if ( init ) { |
---|
| 564 | ConstExprChecker checker; |
---|
| 565 | init->accept( checker ); |
---|
| 566 | return checker.isConstExpr; |
---|
| 567 | } // if |
---|
| 568 | // for all intents and purposes, no initializer means const expr |
---|
| 569 | return true; |
---|
| 570 | } |
---|
| 571 | |
---|
[79970ed] | 572 | bool isConstructor( const std::string & str ) { return str == "?{}"; } |
---|
| 573 | bool isDestructor( const std::string & str ) { return str == "^?{}"; } |
---|
[ee1635c8] | 574 | bool isAssignment( const std::string & str ) { return str == "?=?"; } |
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[79970ed] | 575 | bool isCtorDtor( const std::string & str ) { return isConstructor( str ) || isDestructor( str ); } |
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[ee1635c8] | 576 | bool isCtorDtorAssign( const std::string & str ) { return isCtorDtor( str ) || isAssignment( str ); } |
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[4d4882a] | 577 | |
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[ee1635c8] | 578 | FunctionDecl * isCopyFunction( Declaration * decl, const std::string & fname ) { |
---|
[4d4882a] | 579 | FunctionDecl * function = dynamic_cast< FunctionDecl * >( decl ); |
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| 580 | if ( ! function ) return 0; |
---|
[ee1635c8] | 581 | if ( function->get_name() != fname ) return 0; |
---|
[4d4882a] | 582 | FunctionType * ftype = function->get_functionType(); |
---|
| 583 | if ( ftype->get_parameters().size() != 2 ) return 0; |
---|
| 584 | |
---|
[ce8c12f] | 585 | Type * t1 = getPointerBase( ftype->get_parameters().front()->get_type() ); |
---|
[4d4882a] | 586 | Type * t2 = ftype->get_parameters().back()->get_type(); |
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[ce8c12f] | 587 | assert( t1 ); |
---|
[4d4882a] | 588 | |
---|
[ce8c12f] | 589 | if ( ResolvExpr::typesCompatibleIgnoreQualifiers( t1, t2, SymTab::Indexer() ) ) { |
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[4d4882a] | 590 | return function; |
---|
| 591 | } else { |
---|
[ee1635c8] | 592 | return nullptr; |
---|
[4d4882a] | 593 | } |
---|
| 594 | } |
---|
[ee1635c8] | 595 | |
---|
[207c7e1d] | 596 | FunctionDecl * isAssignment( Declaration * decl ) { |
---|
| 597 | return isCopyFunction( decl, "?=?" ); |
---|
| 598 | } |
---|
| 599 | FunctionDecl * isDestructor( Declaration * decl ) { |
---|
| 600 | if ( isDestructor( decl->get_name() ) ) { |
---|
| 601 | return dynamic_cast< FunctionDecl * >( decl ); |
---|
| 602 | } |
---|
| 603 | return nullptr; |
---|
| 604 | } |
---|
| 605 | FunctionDecl * isDefaultConstructor( Declaration * decl ) { |
---|
| 606 | if ( isConstructor( decl->get_name() ) ) { |
---|
| 607 | if ( FunctionDecl * func = dynamic_cast< FunctionDecl * >( decl ) ) { |
---|
| 608 | if ( func->get_functionType()->get_parameters().size() == 1 ) { |
---|
| 609 | return func; |
---|
| 610 | } |
---|
| 611 | } |
---|
| 612 | } |
---|
| 613 | return nullptr; |
---|
| 614 | } |
---|
[ee1635c8] | 615 | FunctionDecl * isCopyConstructor( Declaration * decl ) { |
---|
| 616 | return isCopyFunction( decl, "?{}" ); |
---|
| 617 | } |
---|
[2b46a13] | 618 | } |
---|