| 1 | //
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
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| 3 | //
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| 4 | // The contents of this file are covered under the licence agreement in the
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| 5 | // file "LICENCE" distributed with Cforall.
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| 6 | //
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| 7 | // MakeLibCfa.cc --
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| 8 | //
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| 9 | // Author : Richard C. Bilson
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| 10 | // Created On : Sat May 16 10:33:33 2015
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| 11 | // Last Modified By : Rob Schluntz
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| 12 | // Last Modified On : Fri Apr 22 13:54:15 2016
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| 13 | // Update Count : 40
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| 14 | //
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| 15 |
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| 16 | #include "MakeLibCfa.h"
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| 17 | #include "SynTree/Visitor.h"
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| 18 | #include "SynTree/Declaration.h"
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| 19 | #include "SynTree/Type.h"
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| 20 | #include "SynTree/Expression.h"
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| 21 | #include "SynTree/Statement.h"
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| 22 | #include "SynTree/Initializer.h"
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| 23 | #include "CodeGen/OperatorTable.h"
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| 24 | #include "Common/UniqueName.h"
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| 25 |
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| 26 | namespace LibCfa {
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| 27 | class MakeLibCfa : public Visitor {
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| 28 | public:
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| 29 | void visit( FunctionDecl* funcDecl );
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| 30 | void visit( ObjectDecl* objDecl );
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| 31 |
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| 32 | std::list< Declaration* > &get_newDecls() { return newDecls; }
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| 33 | private:
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| 34 | std::list< Declaration* > newDecls;
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| 35 | };
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| 36 |
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| 37 | void makeLibCfa( std::list< Declaration* > &prelude ) {
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| 38 | MakeLibCfa maker;
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| 39 | acceptAll( prelude, maker );
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| 40 | prelude.splice( prelude.end(), maker.get_newDecls() );
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| 41 | }
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| 42 |
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| 43 | void MakeLibCfa::visit( FunctionDecl* origFuncDecl ) {
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| 44 | if ( origFuncDecl->get_linkage() != LinkageSpec::Intrinsic ) return;
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| 45 | if ( origFuncDecl->get_statements() ) return;
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| 46 |
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| 47 | FunctionDecl *funcDecl = origFuncDecl->clone();
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| 48 | CodeGen::OperatorInfo opInfo;
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| 49 | bool lookResult = CodeGen::operatorLookup( funcDecl->get_name(), opInfo );
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| 50 | assert( lookResult );
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| 51 | assert( ! funcDecl->get_statements() );
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| 52 | UntypedExpr *newExpr = new UntypedExpr( new NameExpr( funcDecl->get_name() ) );
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| 53 | UniqueName paramNamer( "_p" );
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| 54 | std::list< DeclarationWithType* >::iterator param = funcDecl->get_functionType()->get_parameters().begin();
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| 55 | assert( param != funcDecl->get_functionType()->get_parameters().end() );
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| 56 |
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| 57 | for ( ; param != funcDecl->get_functionType()->get_parameters().end(); ++param ) {
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| 58 | if ( (*param)->get_name() == "" ) {
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| 59 | (*param)->set_name( paramNamer.newName() );
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| 60 | (*param)->set_linkage( LinkageSpec::C );
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| 61 | }
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| 62 | newExpr->get_args().push_back( new VariableExpr( *param ) );
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| 63 | } // for
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| 64 |
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| 65 | funcDecl->set_statements( new CompoundStmt( std::list< Label >() ) );
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| 66 | newDecls.push_back( funcDecl );
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| 67 |
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| 68 | switch ( opInfo.type ) {
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| 69 | case CodeGen::OT_INDEX:
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| 70 | case CodeGen::OT_CALL:
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| 71 | case CodeGen::OT_PREFIX:
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| 72 | case CodeGen::OT_POSTFIX:
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| 73 | case CodeGen::OT_INFIX:
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| 74 | case CodeGen::OT_PREFIXASSIGN:
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| 75 | case CodeGen::OT_POSTFIXASSIGN:
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| 76 | case CodeGen::OT_INFIXASSIGN:
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| 77 | funcDecl->get_statements()->get_kids().push_back( new ReturnStmt( std::list< Label >(), newExpr ) );
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| 78 | break;
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| 79 | case CodeGen::OT_CTOR:
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| 80 | // ctors don't return a value
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| 81 | if ( funcDecl->get_functionType()->get_parameters().size() == 1 ) {
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| 82 | // intrinsic default constructors should do nothing
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| 83 | // delete newExpr;
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| 84 | break;
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| 85 | } else {
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| 86 | assert( funcDecl->get_functionType()->get_parameters().size() == 2 );
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| 87 | // anything else is a single parameter constructor that is effectively a C-style assignment
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| 88 | // delete newExpr->get_function();
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| 89 | assert(newExpr->get_args().size()==2);
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| 90 | newExpr->set_function( new NameExpr( "?=?" ) );
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| 91 | funcDecl->get_statements()->get_kids().push_back( new ExprStmt( std::list< Label >(), newExpr ) );
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| 92 | }
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| 93 | break;
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| 94 | case CodeGen::OT_DTOR:
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| 95 | // intrinsic destructors should do nothing
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| 96 | // delete newExpr;
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| 97 | break;
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| 98 | case CodeGen::OT_CONSTANT:
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| 99 | case CodeGen::OT_LABELADDRESS:
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| 100 | // there are no intrinsic definitions of 0/1 or label addresses as functions
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| 101 | assert( false );
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| 102 | } // switch
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| 103 | }
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| 104 |
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| 105 | void MakeLibCfa::visit( ObjectDecl* origObjDecl ) {
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| 106 | if ( origObjDecl->get_linkage() != LinkageSpec::Intrinsic ) return;
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| 107 |
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| 108 | ObjectDecl *objDecl = origObjDecl->clone();
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| 109 | assert( ! objDecl->get_init() );
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| 110 | std::list< Expression* > noDesignators;
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| 111 | objDecl->set_init( new SingleInit( new NameExpr( objDecl->get_name() ), noDesignators, false ) ); // cannot be constructed
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| 112 | newDecls.push_back( objDecl );
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| 113 | }
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| 114 | } // namespace LibCfa
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