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 | // Box.cc -- |
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8 | // |
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9 | // Author : Richard C. Bilson |
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10 | // Created On : Mon May 18 07:44:20 2015 |
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11 | // Last Modified By : Peter A. Buhr |
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12 | // Last Modified On : Fri Feb 5 16:45:07 2016 |
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13 | // Update Count : 286 |
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14 | // |
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15 | |
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16 | #include <set> |
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17 | #include <stack> |
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18 | #include <string> |
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19 | #include <iterator> |
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20 | #include <algorithm> |
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21 | #include <cassert> |
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22 | |
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23 | #include "Box.h" |
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24 | #include "DeclMutator.h" |
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25 | #include "InstantiateGeneric.h" |
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26 | #include "PolyMutator.h" |
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27 | #include "FindFunction.h" |
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28 | #include "ScrubTyVars.h" |
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29 | |
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30 | #include "Parser/ParseNode.h" |
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31 | |
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32 | #include "SynTree/Constant.h" |
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33 | #include "SynTree/Type.h" |
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34 | #include "SynTree/Expression.h" |
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35 | #include "SynTree/Initializer.h" |
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36 | #include "SynTree/Statement.h" |
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37 | #include "SynTree/Mutator.h" |
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38 | |
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39 | #include "ResolvExpr/TypeEnvironment.h" |
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40 | #include "ResolvExpr/TypeMap.h" |
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41 | #include "ResolvExpr/typeops.h" |
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42 | |
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43 | #include "SymTab/Mangler.h" |
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44 | |
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45 | #include "Common/SemanticError.h" |
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46 | #include "Common/UniqueName.h" |
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47 | #include "Common/utility.h" |
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48 | |
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49 | #include <ext/functional> // temporary |
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50 | |
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51 | namespace GenPoly { |
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52 | namespace { |
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53 | const std::list<Label> noLabels; |
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54 | |
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55 | FunctionType *makeAdapterType( FunctionType *adaptee, const TyVarMap &tyVars ); |
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56 | |
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57 | /// Adds layout-generation functions to polymorphic types |
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58 | class LayoutFunctionBuilder : public DeclMutator { |
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59 | unsigned int functionNesting; // current level of nested functions |
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60 | public: |
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61 | LayoutFunctionBuilder() : functionNesting( 0 ) {} |
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62 | |
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63 | virtual DeclarationWithType *mutate( FunctionDecl *functionDecl ); |
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64 | virtual Declaration *mutate( StructDecl *structDecl ); |
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65 | virtual Declaration *mutate( UnionDecl *unionDecl ); |
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66 | }; |
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67 | |
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68 | /// Replaces polymorphic return types with out-parameters, replaces calls to polymorphic functions with adapter calls as needed, and adds appropriate type variables to the function call |
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69 | class Pass1 : public PolyMutator { |
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70 | public: |
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71 | Pass1(); |
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72 | virtual Expression *mutate( ApplicationExpr *appExpr ); |
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73 | virtual Expression *mutate( AddressExpr *addrExpr ); |
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74 | virtual Expression *mutate( UntypedExpr *expr ); |
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75 | virtual DeclarationWithType* mutate( FunctionDecl *functionDecl ); |
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76 | virtual TypeDecl *mutate( TypeDecl *typeDecl ); |
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77 | virtual Expression *mutate( CommaExpr *commaExpr ); |
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78 | virtual Expression *mutate( ConditionalExpr *condExpr ); |
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79 | virtual Statement * mutate( ReturnStmt *returnStmt ); |
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80 | virtual Type *mutate( PointerType *pointerType ); |
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81 | virtual Type * mutate( FunctionType *functionType ); |
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82 | |
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83 | virtual void doBeginScope(); |
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84 | virtual void doEndScope(); |
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85 | private: |
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86 | /// Makes a new temporary array holding the offsets of the fields of `type`, and returns a new variable expression referencing it |
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87 | Expression *makeOffsetArray( StructInstType *type ); |
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88 | /// Pass the extra type parameters from polymorphic generic arguments or return types into a function application |
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89 | void passArgTypeVars( ApplicationExpr *appExpr, Type *parmType, Type *argBaseType, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars, std::set< std::string > &seenTypes ); |
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90 | /// passes extra type parameters into a polymorphic function application |
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91 | void passTypeVars( ApplicationExpr *appExpr, ReferenceToType *polyRetType, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars ); |
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92 | /// wraps a function application with a new temporary for the out-parameter return value |
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93 | Expression *addRetParam( ApplicationExpr *appExpr, FunctionType *function, Type *retType, std::list< Expression *>::iterator &arg ); |
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94 | /// Replaces all the type parameters of a generic type with their concrete equivalents under the current environment |
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95 | void replaceParametersWithConcrete( ApplicationExpr *appExpr, std::list< Expression* >& params ); |
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96 | /// Replaces a polymorphic type with its concrete equivalant under the current environment (returns itself if concrete). |
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97 | /// If `doClone` is set to false, will not clone interior types |
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98 | Type *replaceWithConcrete( ApplicationExpr *appExpr, Type *type, bool doClone = true ); |
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99 | /// wraps a function application returning a polymorphic type with a new temporary for the out-parameter return value |
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100 | Expression *addPolyRetParam( ApplicationExpr *appExpr, FunctionType *function, ReferenceToType *polyType, std::list< Expression *>::iterator &arg ); |
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101 | Expression *applyAdapter( ApplicationExpr *appExpr, FunctionType *function, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars ); |
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102 | void boxParam( Type *formal, Expression *&arg, const TyVarMap &exprTyVars ); |
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103 | void boxParams( ApplicationExpr *appExpr, FunctionType *function, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars ); |
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104 | void addInferredParams( ApplicationExpr *appExpr, FunctionType *functionType, std::list< Expression *>::iterator &arg, const TyVarMap &tyVars ); |
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105 | /// Stores assignment operators from assertion list in local map of assignment operations |
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106 | void findAssignOps( const std::list< TypeDecl *> &forall ); |
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107 | void passAdapters( ApplicationExpr *appExpr, FunctionType *functionType, const TyVarMap &exprTyVars ); |
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108 | FunctionDecl *makeAdapter( FunctionType *adaptee, FunctionType *realType, const std::string &mangleName, const TyVarMap &tyVars ); |
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109 | /// Replaces intrinsic operator functions with their arithmetic desugaring |
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110 | Expression *handleIntrinsics( ApplicationExpr *appExpr ); |
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111 | /// Inserts a new temporary variable into the current scope with an auto-generated name |
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112 | ObjectDecl *makeTemporary( Type *type ); |
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113 | |
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114 | typedef std::map< std::string, DeclarationWithType *> AdapterMap; |
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115 | std::map< std::string, DeclarationWithType *> assignOps; |
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116 | ResolvExpr::TypeMap< DeclarationWithType > scopedAssignOps; |
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117 | std::stack< AdapterMap > adapters; |
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118 | DeclarationWithType *retval; |
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119 | bool useRetval; |
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120 | UniqueName tempNamer; |
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121 | }; |
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122 | |
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123 | /// Moves polymorphic returns in function types to pointer-type parameters, adds type size and assertion parameters to parameter lists as well |
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124 | class Pass2 : public PolyMutator { |
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125 | public: |
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126 | template< typename DeclClass > |
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127 | DeclClass *handleDecl( DeclClass *decl, Type *type ); |
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128 | virtual DeclarationWithType *mutate( FunctionDecl *functionDecl ); |
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129 | virtual ObjectDecl *mutate( ObjectDecl *objectDecl ); |
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130 | virtual TypeDecl *mutate( TypeDecl *typeDecl ); |
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131 | virtual TypedefDecl *mutate( TypedefDecl *typedefDecl ); |
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132 | virtual Type *mutate( PointerType *pointerType ); |
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133 | virtual Type *mutate( FunctionType *funcType ); |
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134 | private: |
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135 | void addAdapters( FunctionType *functionType ); |
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136 | |
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137 | std::map< UniqueId, std::string > adapterName; |
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138 | }; |
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139 | |
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140 | /// Replaces member expressions for polymorphic types with calculated add-field-offset-and-dereference; |
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141 | /// also fixes offsetof expressions. |
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142 | class MemberExprFixer : public PolyMutator { |
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143 | public: |
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144 | template< typename DeclClass > |
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145 | DeclClass *handleDecl( DeclClass *decl, Type *type ); |
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146 | virtual DeclarationWithType *mutate( FunctionDecl *functionDecl ); |
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147 | virtual ObjectDecl *mutate( ObjectDecl *objectDecl ); |
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148 | virtual TypedefDecl *mutate( TypedefDecl *objectDecl ); |
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149 | virtual TypeDecl *mutate( TypeDecl *objectDecl ); |
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150 | virtual Statement *mutate( DeclStmt *declStmt ); |
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151 | virtual Type *mutate( PointerType *pointerType ); |
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152 | virtual Type *mutate( FunctionType *funcType ); |
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153 | virtual Expression *mutate( MemberExpr *memberExpr ); |
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154 | virtual Expression *mutate( OffsetofExpr *offsetofExpr ); |
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155 | }; |
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156 | |
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157 | /// Replaces initialization of polymorphic values with alloca, declaration of dtype/ftype with appropriate void expression, and sizeof expressions of polymorphic types with the proper variable |
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158 | class Pass3 : public PolyMutator { |
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159 | public: |
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160 | template< typename DeclClass > |
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161 | DeclClass *handleDecl( DeclClass *decl, Type *type ); |
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162 | virtual DeclarationWithType *mutate( FunctionDecl *functionDecl ); |
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163 | virtual ObjectDecl *mutate( ObjectDecl *objectDecl ); |
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164 | virtual TypedefDecl *mutate( TypedefDecl *objectDecl ); |
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165 | virtual TypeDecl *mutate( TypeDecl *objectDecl ); |
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166 | virtual Type *mutate( PointerType *pointerType ); |
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167 | virtual Type *mutate( FunctionType *funcType ); |
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168 | private: |
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169 | }; |
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170 | |
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171 | } // anonymous namespace |
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172 | |
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173 | /// version of mutateAll with special handling for translation unit so you can check the end of the prelude when debugging |
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174 | template< typename MutatorType > |
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175 | inline void mutateTranslationUnit( std::list< Declaration* > &translationUnit, MutatorType &mutator ) { |
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176 | bool seenIntrinsic = false; |
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177 | SemanticError errors; |
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178 | for ( typename std::list< Declaration* >::iterator i = translationUnit.begin(); i != translationUnit.end(); ++i ) { |
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179 | try { |
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180 | if ( *i ) { |
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181 | if ( (*i)->get_linkage() == LinkageSpec::Intrinsic ) { |
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182 | seenIntrinsic = true; |
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183 | } else if ( seenIntrinsic ) { |
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184 | seenIntrinsic = false; // break on this line when debugging for end of prelude |
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185 | } |
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186 | |
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187 | *i = dynamic_cast< Declaration* >( (*i)->acceptMutator( mutator ) ); |
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188 | assert( *i ); |
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189 | } // if |
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190 | } catch( SemanticError &e ) { |
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191 | errors.append( e ); |
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192 | } // try |
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193 | } // for |
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194 | if ( ! errors.isEmpty() ) { |
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195 | throw errors; |
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196 | } // if |
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197 | } |
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198 | |
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199 | void box( std::list< Declaration *>& translationUnit ) { |
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200 | LayoutFunctionBuilder layoutBuilder; |
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201 | Pass1 pass1; |
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202 | Pass2 pass2; |
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203 | MemberExprFixer memberFixer; |
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204 | Pass3 pass3; |
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205 | layoutBuilder.mutateDeclarationList( translationUnit ); |
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206 | mutateTranslationUnit/*All*/( translationUnit, pass1 ); |
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207 | mutateTranslationUnit/*All*/( translationUnit, pass2 ); |
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208 | instantiateGeneric( translationUnit ); |
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209 | mutateTranslationUnit/*All*/( translationUnit, memberFixer ); |
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210 | mutateTranslationUnit/*All*/( translationUnit, pass3 ); |
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211 | } |
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212 | |
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213 | ////////////////////////////////// LayoutFunctionBuilder //////////////////////////////////////////// |
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214 | |
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215 | DeclarationWithType *LayoutFunctionBuilder::mutate( FunctionDecl *functionDecl ) { |
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216 | functionDecl->set_functionType( maybeMutate( functionDecl->get_functionType(), *this ) ); |
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217 | mutateAll( functionDecl->get_oldDecls(), *this ); |
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218 | ++functionNesting; |
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219 | functionDecl->set_statements( maybeMutate( functionDecl->get_statements(), *this ) ); |
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220 | --functionNesting; |
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221 | return functionDecl; |
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222 | } |
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223 | |
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224 | /// Get a list of type declarations that will affect a layout function |
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225 | std::list< TypeDecl* > takeOtypeOnly( std::list< TypeDecl* > &decls ) { |
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226 | std::list< TypeDecl * > otypeDecls; |
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227 | |
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228 | for ( std::list< TypeDecl* >::const_iterator decl = decls.begin(); decl != decls.end(); ++decl ) { |
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229 | if ( (*decl)->get_kind() == TypeDecl::Any ) { |
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230 | otypeDecls.push_back( *decl ); |
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231 | } |
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232 | } |
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233 | |
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234 | return otypeDecls; |
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235 | } |
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236 | |
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237 | /// Adds parameters for otype layout to a function type |
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238 | void addOtypeParams( FunctionType *layoutFnType, std::list< TypeDecl* > &otypeParams ) { |
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239 | BasicType sizeAlignType( Type::Qualifiers(), BasicType::LongUnsignedInt ); |
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240 | |
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241 | for ( std::list< TypeDecl* >::const_iterator param = otypeParams.begin(); param != otypeParams.end(); ++param ) { |
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242 | layoutFnType->get_parameters().push_back( new ObjectDecl( sizeofName( (*param)->get_base() ), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignType.clone(), 0 ) ); |
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243 | } |
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244 | } |
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245 | |
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246 | /// Builds a layout function declaration |
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247 | FunctionDecl *buildLayoutFunctionDecl( const std::string &typeName, unsigned int functionNesting, FunctionType *layoutFnType ) { |
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248 | // Routines at global scope marked "static" to prevent multiple definitions is separate translation units |
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249 | // because each unit generates copies of the default routines for each aggregate. |
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250 | FunctionDecl *layoutDecl = new FunctionDecl( |
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251 | "__layoutof_" + typeName, functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, layoutFnType, new CompoundStmt( noLabels ), true, false ); |
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252 | layoutDecl->fixUniqueId(); |
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253 | return layoutDecl; |
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254 | } |
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255 | |
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256 | /// Makes a unary operation |
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257 | Expression *makeOp( const std::string &name, Expression *arg ) { |
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258 | UntypedExpr *expr = new UntypedExpr( new NameExpr( name ) ); |
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259 | expr->get_args().push_back( arg ); |
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260 | return expr; |
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261 | } |
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262 | |
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263 | /// Makes a binary operation |
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264 | Expression *makeOp( const std::string &name, Expression *lhs, Expression *rhs ) { |
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265 | UntypedExpr *expr = new UntypedExpr( new NameExpr( name ) ); |
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266 | expr->get_args().push_back( lhs ); |
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267 | expr->get_args().push_back( rhs ); |
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268 | return expr; |
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269 | } |
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270 | |
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271 | /// Returns the dereference of a local pointer variable |
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272 | Expression *derefVar( ObjectDecl *var ) { |
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273 | return makeOp( "*?", new VariableExpr( var ) ); |
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274 | } |
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275 | |
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276 | /// makes an if-statement with a single-expression if-block and no then block |
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277 | Statement *makeCond( Expression *cond, Expression *ifPart ) { |
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278 | return new IfStmt( noLabels, cond, new ExprStmt( noLabels, ifPart ), 0 ); |
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279 | } |
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280 | |
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281 | /// makes a statement that assigns rhs to lhs if lhs < rhs |
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282 | Statement *makeAssignMax( Expression *lhs, Expression *rhs ) { |
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283 | return makeCond( makeOp( "?<?", lhs, rhs ), makeOp( "?=?", lhs->clone(), rhs->clone() ) ); |
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284 | } |
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285 | |
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286 | /// makes a statement that aligns lhs to rhs (rhs should be an integer power of two) |
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287 | Statement *makeAlignTo( Expression *lhs, Expression *rhs ) { |
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288 | // check that the lhs is zeroed out to the level of rhs |
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289 | Expression *ifCond = makeOp( "?&?", lhs, makeOp( "?-?", rhs, new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), "1" ) ) ) ); |
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290 | // if not aligned, increment to alignment |
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291 | Expression *ifExpr = makeOp( "?+=?", lhs->clone(), makeOp( "?-?", rhs->clone(), ifCond->clone() ) ); |
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292 | return makeCond( ifCond, ifExpr ); |
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293 | } |
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294 | |
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295 | /// adds an expression to a compound statement |
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296 | void addExpr( CompoundStmt *stmts, Expression *expr ) { |
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297 | stmts->get_kids().push_back( new ExprStmt( noLabels, expr ) ); |
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298 | } |
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299 | |
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300 | /// adds a statement to a compound statement |
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301 | void addStmt( CompoundStmt *stmts, Statement *stmt ) { |
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302 | stmts->get_kids().push_back( stmt ); |
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303 | } |
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304 | |
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305 | Declaration *LayoutFunctionBuilder::mutate( StructDecl *structDecl ) { |
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306 | // do not generate layout function for "empty" tag structs |
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307 | if ( structDecl->get_members().empty() ) return structDecl; |
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308 | |
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309 | // get parameters that can change layout, exiting early if none |
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310 | std::list< TypeDecl* > otypeParams = takeOtypeOnly( structDecl->get_parameters() ); |
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311 | if ( otypeParams.empty() ) return structDecl; |
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312 | |
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313 | // build layout function signature |
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314 | FunctionType *layoutFnType = new FunctionType( Type::Qualifiers(), false ); |
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315 | BasicType *sizeAlignType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ); |
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316 | PointerType *sizeAlignOutType = new PointerType( Type::Qualifiers(), sizeAlignType ); |
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317 | |
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318 | ObjectDecl *sizeParam = new ObjectDecl( "__sizeof_" + structDecl->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType, 0 ); |
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319 | layoutFnType->get_parameters().push_back( sizeParam ); |
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320 | ObjectDecl *alignParam = new ObjectDecl( "__alignof_" + structDecl->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType->clone(), 0 ); |
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321 | layoutFnType->get_parameters().push_back( alignParam ); |
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322 | ObjectDecl *offsetParam = new ObjectDecl( "__offsetof_" + structDecl->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType->clone(), 0 ); |
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323 | layoutFnType->get_parameters().push_back( offsetParam ); |
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324 | addOtypeParams( layoutFnType, otypeParams ); |
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325 | |
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326 | // build function decl |
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327 | FunctionDecl *layoutDecl = buildLayoutFunctionDecl( structDecl->get_name(), functionNesting, layoutFnType ); |
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328 | |
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329 | // calculate struct layout in function body |
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330 | |
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331 | // initialize size and alignment to 0 and 1 (will have at least one member to re-edit size |
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332 | addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( sizeParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "0" ) ) ) ); |
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333 | addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( alignParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "1" ) ) ) ); |
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334 | unsigned long n_members = 0; |
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335 | bool firstMember = true; |
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336 | for ( std::list< Declaration* >::const_iterator member = structDecl->get_members().begin(); member != structDecl->get_members().end(); ++member ) { |
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337 | DeclarationWithType *dwt = dynamic_cast< DeclarationWithType * >( *member ); |
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338 | assert( dwt ); |
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339 | |
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340 | if ( firstMember ) { |
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341 | firstMember = false; |
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342 | } else { |
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343 | // make sure all members after the first (automatically aligned at 0) are properly padded for alignment |
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344 | addStmt( layoutDecl->get_statements(), makeAlignTo( derefVar( sizeParam ), new AlignofExpr( dwt->get_type() ) ) ); |
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345 | } |
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346 | |
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347 | // place current size in the current offset index |
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348 | addExpr( layoutDecl->get_statements(), makeOp( "?=?", makeOp( "?[?]", new VariableExpr( offsetParam ), new ConstantExpr( Constant::from( n_members ) ) ), |
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349 | derefVar( sizeParam ) ) ); |
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350 | ++n_members; |
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351 | |
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352 | // add member size to current size |
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353 | addExpr( layoutDecl->get_statements(), makeOp( "?+=?", derefVar( sizeParam ), new SizeofExpr( dwt->get_type() ) ) ); |
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354 | |
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355 | // take max of member alignment and global alignment |
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356 | addStmt( layoutDecl->get_statements(), makeAssignMax( derefVar( alignParam ), new AlignofExpr( dwt->get_type() ) ) ); |
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357 | } |
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358 | // make sure the type is end-padded to a multiple of its alignment |
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359 | addStmt( layoutDecl->get_statements(), makeAlignTo( derefVar( sizeParam ), derefVar( alignParam ) ) ); |
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360 | |
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361 | addDeclarationAfter( layoutDecl ); |
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362 | return structDecl; |
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363 | } |
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364 | |
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365 | Declaration *LayoutFunctionBuilder::mutate( UnionDecl *unionDecl ) { |
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366 | // do not generate layout function for "empty" tag unions |
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367 | if ( unionDecl->get_members().empty() ) return unionDecl; |
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368 | |
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369 | // get parameters that can change layout, exiting early if none |
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370 | std::list< TypeDecl* > otypeParams = takeOtypeOnly( unionDecl->get_parameters() ); |
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371 | if ( otypeParams.empty() ) return unionDecl; |
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372 | |
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373 | // build layout function signature |
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374 | FunctionType *layoutFnType = new FunctionType( Type::Qualifiers(), false ); |
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375 | BasicType *sizeAlignType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ); |
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376 | PointerType *sizeAlignOutType = new PointerType( Type::Qualifiers(), sizeAlignType ); |
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377 | |
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378 | ObjectDecl *sizeParam = new ObjectDecl( "__sizeof_" + unionDecl->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType, 0 ); |
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379 | layoutFnType->get_parameters().push_back( sizeParam ); |
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380 | ObjectDecl *alignParam = new ObjectDecl( "__alignof_" + unionDecl->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, sizeAlignOutType->clone(), 0 ); |
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381 | layoutFnType->get_parameters().push_back( alignParam ); |
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382 | addOtypeParams( layoutFnType, otypeParams ); |
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383 | |
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384 | // build function decl |
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385 | FunctionDecl *layoutDecl = buildLayoutFunctionDecl( unionDecl->get_name(), functionNesting, layoutFnType ); |
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386 | |
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387 | // calculate union layout in function body |
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388 | addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( sizeParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "1" ) ) ) ); |
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389 | addExpr( layoutDecl->get_statements(), makeOp( "?=?", derefVar( alignParam ), new ConstantExpr( Constant( sizeAlignType->clone(), "1" ) ) ) ); |
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390 | for ( std::list< Declaration* >::const_iterator member = unionDecl->get_members().begin(); member != unionDecl->get_members().end(); ++member ) { |
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391 | DeclarationWithType *dwt = dynamic_cast< DeclarationWithType * >( *member ); |
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392 | assert( dwt ); |
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393 | |
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394 | // take max member size and global size |
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395 | addStmt( layoutDecl->get_statements(), makeAssignMax( derefVar( sizeParam ), new SizeofExpr( dwt->get_type() ) ) ); |
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396 | |
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397 | // take max of member alignment and global alignment |
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398 | addStmt( layoutDecl->get_statements(), makeAssignMax( derefVar( alignParam ), new AlignofExpr( dwt->get_type() ) ) ); |
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399 | } |
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400 | // make sure the type is end-padded to a multiple of its alignment |
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401 | addStmt( layoutDecl->get_statements(), makeAlignTo( derefVar( sizeParam ), derefVar( alignParam ) ) ); |
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402 | |
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403 | addDeclarationAfter( layoutDecl ); |
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404 | return unionDecl; |
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405 | } |
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406 | |
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407 | ////////////////////////////////////////// Pass1 //////////////////////////////////////////////////// |
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408 | |
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409 | namespace { |
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410 | std::string makePolyMonoSuffix( FunctionType * function, const TyVarMap &tyVars ) { |
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411 | std::stringstream name; |
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412 | |
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413 | // NOTE: this function previously used isPolyObj, which failed to produce |
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414 | // the correct thing in some situations. It's not clear to me why this wasn't working. |
---|
415 | |
---|
416 | // if the return type or a parameter type involved polymorphic types, then the adapter will need |
---|
417 | // to take those polymorphic types as pointers. Therefore, there can be two different functions |
---|
418 | // with the same mangled name, so we need to further mangle the names. |
---|
419 | for ( std::list< DeclarationWithType *>::iterator retval = function->get_returnVals().begin(); retval != function->get_returnVals().end(); ++retval ) { |
---|
420 | if ( isPolyType( (*retval)->get_type(), tyVars ) ) { |
---|
421 | name << "P"; |
---|
422 | } else { |
---|
423 | name << "M"; |
---|
424 | } |
---|
425 | } |
---|
426 | name << "_"; |
---|
427 | std::list< DeclarationWithType *> ¶mList = function->get_parameters(); |
---|
428 | for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) { |
---|
429 | if ( isPolyType( (*arg)->get_type(), tyVars ) ) { |
---|
430 | name << "P"; |
---|
431 | } else { |
---|
432 | name << "M"; |
---|
433 | } |
---|
434 | } // for |
---|
435 | return name.str(); |
---|
436 | } |
---|
437 | |
---|
438 | std::string mangleAdapterName( FunctionType * function, const TyVarMap &tyVars ) { |
---|
439 | return SymTab::Mangler::mangle( function ) + makePolyMonoSuffix( function, tyVars ); |
---|
440 | } |
---|
441 | |
---|
442 | std::string makeAdapterName( const std::string &mangleName ) { |
---|
443 | return "_adapter" + mangleName; |
---|
444 | } |
---|
445 | |
---|
446 | Pass1::Pass1() : useRetval( false ), tempNamer( "_temp" ) { |
---|
447 | adapters.push(AdapterMap()); |
---|
448 | } |
---|
449 | |
---|
450 | /// Returns T if the given declaration is (*?=?)(T *, T) for some TypeInstType T (return not checked, but maybe should be), NULL otherwise |
---|
451 | TypeInstType *isTypeInstAssignment( DeclarationWithType *decl ) { |
---|
452 | if ( decl->get_name() == "?=?" ) { |
---|
453 | if ( FunctionType *funType = getFunctionType( decl->get_type() ) ) { |
---|
454 | if ( funType->get_parameters().size() == 2 ) { |
---|
455 | if ( PointerType *pointer = dynamic_cast< PointerType *>( funType->get_parameters().front()->get_type() ) ) { |
---|
456 | if ( TypeInstType *refType = dynamic_cast< TypeInstType *>( pointer->get_base() ) ) { |
---|
457 | if ( TypeInstType *refType2 = dynamic_cast< TypeInstType *>( funType->get_parameters().back()->get_type() ) ) { |
---|
458 | if ( refType->get_name() == refType2->get_name() ) { |
---|
459 | return refType; |
---|
460 | } // if |
---|
461 | } // if |
---|
462 | } // if |
---|
463 | } // if |
---|
464 | } // if |
---|
465 | } // if |
---|
466 | } // if |
---|
467 | return 0; |
---|
468 | } |
---|
469 | |
---|
470 | /// returns T if the given declaration is: (*?=?)(T *, T) for some type T (return not checked, but maybe should be), NULL otherwise |
---|
471 | /// Only picks assignments where neither parameter is cv-qualified |
---|
472 | Type *isAssignment( DeclarationWithType *decl ) { |
---|
473 | if ( decl->get_name() == "?=?" ) { |
---|
474 | if ( FunctionType *funType = getFunctionType( decl->get_type() ) ) { |
---|
475 | if ( funType->get_parameters().size() == 2 ) { |
---|
476 | Type::Qualifiers defaultQualifiers; |
---|
477 | Type *paramType1 = funType->get_parameters().front()->get_type(); |
---|
478 | if ( paramType1->get_qualifiers() != defaultQualifiers ) return 0; |
---|
479 | Type *paramType2 = funType->get_parameters().back()->get_type(); |
---|
480 | if ( paramType2->get_qualifiers() != defaultQualifiers ) return 0; |
---|
481 | |
---|
482 | if ( PointerType *pointerType = dynamic_cast< PointerType* >( paramType1 ) ) { |
---|
483 | Type *baseType1 = pointerType->get_base(); |
---|
484 | if ( baseType1->get_qualifiers() != defaultQualifiers ) return 0; |
---|
485 | SymTab::Indexer dummy; |
---|
486 | if ( ResolvExpr::typesCompatible( baseType1, paramType2, dummy ) ) { |
---|
487 | return baseType1; |
---|
488 | } // if |
---|
489 | } // if |
---|
490 | } // if |
---|
491 | } // if |
---|
492 | } // if |
---|
493 | return 0; |
---|
494 | } |
---|
495 | |
---|
496 | void Pass1::findAssignOps( const std::list< TypeDecl *> &forall ) { |
---|
497 | // what if a nested function uses an assignment operator? |
---|
498 | // assignOps.clear(); |
---|
499 | for ( std::list< TypeDecl *>::const_iterator i = forall.begin(); i != forall.end(); ++i ) { |
---|
500 | for ( std::list< DeclarationWithType *>::const_iterator assert = (*i)->get_assertions().begin(); assert != (*i)->get_assertions().end(); ++assert ) { |
---|
501 | std::string typeName; |
---|
502 | if ( TypeInstType *typeInst = isTypeInstAssignment( *assert ) ) { |
---|
503 | assignOps[ typeInst->get_name() ] = *assert; |
---|
504 | } // if |
---|
505 | } // for |
---|
506 | } // for |
---|
507 | } |
---|
508 | |
---|
509 | DeclarationWithType *Pass1::mutate( FunctionDecl *functionDecl ) { |
---|
510 | // if this is a polymorphic assignment function, put it in the map for this scope |
---|
511 | if ( Type *assignedType = isAssignment( functionDecl ) ) { |
---|
512 | if ( ! dynamic_cast< TypeInstType* >( assignedType ) ) { |
---|
513 | scopedAssignOps.insert( assignedType, functionDecl ); |
---|
514 | } |
---|
515 | } |
---|
516 | |
---|
517 | if ( functionDecl->get_statements() ) { // empty routine body ? |
---|
518 | doBeginScope(); |
---|
519 | TyVarMap oldtyVars = scopeTyVars; |
---|
520 | std::map< std::string, DeclarationWithType *> oldassignOps = assignOps; |
---|
521 | DeclarationWithType *oldRetval = retval; |
---|
522 | bool oldUseRetval = useRetval; |
---|
523 | |
---|
524 | // process polymorphic return value |
---|
525 | retval = 0; |
---|
526 | if ( isPolyRet( functionDecl->get_functionType() ) && functionDecl->get_linkage() == LinkageSpec::Cforall ) { |
---|
527 | retval = functionDecl->get_functionType()->get_returnVals().front(); |
---|
528 | |
---|
529 | // give names to unnamed return values |
---|
530 | if ( retval->get_name() == "" ) { |
---|
531 | retval->set_name( "_retparm" ); |
---|
532 | retval->set_linkage( LinkageSpec::C ); |
---|
533 | } // if |
---|
534 | } // if |
---|
535 | |
---|
536 | FunctionType *functionType = functionDecl->get_functionType(); |
---|
537 | makeTyVarMap( functionDecl->get_functionType(), scopeTyVars ); |
---|
538 | findAssignOps( functionDecl->get_functionType()->get_forall() ); |
---|
539 | |
---|
540 | std::list< DeclarationWithType *> ¶mList = functionType->get_parameters(); |
---|
541 | std::list< FunctionType *> functions; |
---|
542 | for ( std::list< TypeDecl *>::iterator tyVar = functionType->get_forall().begin(); tyVar != functionType->get_forall().end(); ++tyVar ) { |
---|
543 | for ( std::list< DeclarationWithType *>::iterator assert = (*tyVar)->get_assertions().begin(); assert != (*tyVar)->get_assertions().end(); ++assert ) { |
---|
544 | findFunction( (*assert)->get_type(), functions, scopeTyVars, needsAdapter ); |
---|
545 | } // for |
---|
546 | } // for |
---|
547 | for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) { |
---|
548 | findFunction( (*arg)->get_type(), functions, scopeTyVars, needsAdapter ); |
---|
549 | } // for |
---|
550 | |
---|
551 | AdapterMap & adapters = Pass1::adapters.top(); |
---|
552 | for ( std::list< FunctionType *>::iterator funType = functions.begin(); funType != functions.end(); ++funType ) { |
---|
553 | std::string mangleName = mangleAdapterName( *funType, scopeTyVars ); |
---|
554 | if ( adapters.find( mangleName ) == adapters.end() ) { |
---|
555 | std::string adapterName = makeAdapterName( mangleName ); |
---|
556 | adapters.insert( std::pair< std::string, DeclarationWithType *>( mangleName, new ObjectDecl( adapterName, DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new PointerType( Type::Qualifiers(), makeAdapterType( *funType, scopeTyVars ) ), 0 ) ) ); |
---|
557 | } // if |
---|
558 | } // for |
---|
559 | |
---|
560 | functionDecl->set_statements( functionDecl->get_statements()->acceptMutator( *this ) ); |
---|
561 | |
---|
562 | scopeTyVars = oldtyVars; |
---|
563 | assignOps = oldassignOps; |
---|
564 | // std::cerr << "end FunctionDecl: "; |
---|
565 | // for ( TyVarMap::iterator i = scopeTyVars.begin(); i != scopeTyVars.end(); ++i ) { |
---|
566 | // std::cerr << i->first << " "; |
---|
567 | // } |
---|
568 | // std::cerr << "\n"; |
---|
569 | retval = oldRetval; |
---|
570 | useRetval = oldUseRetval; |
---|
571 | doEndScope(); |
---|
572 | } // if |
---|
573 | return functionDecl; |
---|
574 | } |
---|
575 | |
---|
576 | TypeDecl *Pass1::mutate( TypeDecl *typeDecl ) { |
---|
577 | scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind(); |
---|
578 | return Mutator::mutate( typeDecl ); |
---|
579 | } |
---|
580 | |
---|
581 | Expression *Pass1::mutate( CommaExpr *commaExpr ) { |
---|
582 | bool oldUseRetval = useRetval; |
---|
583 | useRetval = false; |
---|
584 | commaExpr->set_arg1( maybeMutate( commaExpr->get_arg1(), *this ) ); |
---|
585 | useRetval = oldUseRetval; |
---|
586 | commaExpr->set_arg2( maybeMutate( commaExpr->get_arg2(), *this ) ); |
---|
587 | return commaExpr; |
---|
588 | } |
---|
589 | |
---|
590 | Expression *Pass1::mutate( ConditionalExpr *condExpr ) { |
---|
591 | bool oldUseRetval = useRetval; |
---|
592 | useRetval = false; |
---|
593 | condExpr->set_arg1( maybeMutate( condExpr->get_arg1(), *this ) ); |
---|
594 | useRetval = oldUseRetval; |
---|
595 | condExpr->set_arg2( maybeMutate( condExpr->get_arg2(), *this ) ); |
---|
596 | condExpr->set_arg3( maybeMutate( condExpr->get_arg3(), *this ) ); |
---|
597 | return condExpr; |
---|
598 | |
---|
599 | } |
---|
600 | |
---|
601 | Expression *Pass1::makeOffsetArray( StructInstType *ty ) { |
---|
602 | std::list< Declaration* > &baseMembers = ty->get_baseStruct()->get_members(); |
---|
603 | |
---|
604 | // make a new temporary array |
---|
605 | Type *offsetType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ); |
---|
606 | std::stringstream lenGen; |
---|
607 | lenGen << baseMembers.size(); |
---|
608 | ConstantExpr *lenExpr = new ConstantExpr( Constant( offsetType->clone(), lenGen.str() ) ); |
---|
609 | ObjectDecl *arrayTemp = makeTemporary( new ArrayType( Type::Qualifiers(), offsetType, lenExpr, false, false ) ); |
---|
610 | |
---|
611 | // build initializer list for temporary |
---|
612 | std::list< Initializer* > inits; |
---|
613 | for ( std::list< Declaration* >::const_iterator member = baseMembers.begin(); member != baseMembers.end(); ++member ) { |
---|
614 | DeclarationWithType *memberDecl; |
---|
615 | if ( DeclarationWithType *origMember = dynamic_cast< DeclarationWithType* >( *member ) ) { |
---|
616 | memberDecl = origMember->clone(); |
---|
617 | } else { |
---|
618 | memberDecl = new ObjectDecl( (*member)->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, offsetType->clone(), 0 ); |
---|
619 | } |
---|
620 | inits.push_back( new SingleInit( new OffsetofExpr( ty->clone(), memberDecl ) ) ); |
---|
621 | } |
---|
622 | arrayTemp->set_init( new ListInit( inits ) ); |
---|
623 | |
---|
624 | // return variable pointing to temporary |
---|
625 | return new VariableExpr( arrayTemp ); |
---|
626 | } |
---|
627 | |
---|
628 | void Pass1::passArgTypeVars( ApplicationExpr *appExpr, Type *parmType, Type *argBaseType, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars, std::set< std::string > &seenTypes ) { |
---|
629 | Type *polyBase = hasPolyBase( parmType, exprTyVars ); |
---|
630 | if ( polyBase && ! dynamic_cast< TypeInstType* >( polyBase ) ) { |
---|
631 | std::string sizeName = sizeofName( polyBase ); |
---|
632 | if ( seenTypes.count( sizeName ) ) return; |
---|
633 | |
---|
634 | arg = appExpr->get_args().insert( arg, new SizeofExpr( argBaseType->clone() ) ); |
---|
635 | arg++; |
---|
636 | arg = appExpr->get_args().insert( arg, new AlignofExpr( argBaseType->clone() ) ); |
---|
637 | arg++; |
---|
638 | if ( dynamic_cast< StructInstType* >( polyBase ) ) { |
---|
639 | if ( StructInstType *argBaseStructType = dynamic_cast< StructInstType* >( argBaseType ) ) { |
---|
640 | arg = appExpr->get_args().insert( arg, makeOffsetArray( argBaseStructType ) ); |
---|
641 | arg++; |
---|
642 | } else { |
---|
643 | throw SemanticError( "Cannot pass non-struct type for generic struct" ); |
---|
644 | } |
---|
645 | } |
---|
646 | |
---|
647 | seenTypes.insert( sizeName ); |
---|
648 | } |
---|
649 | } |
---|
650 | |
---|
651 | void Pass1::passTypeVars( ApplicationExpr *appExpr, ReferenceToType *polyRetType, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars ) { |
---|
652 | // pass size/align for type variables |
---|
653 | for ( TyVarMap::const_iterator tyParm = exprTyVars.begin(); tyParm != exprTyVars.end(); ++tyParm ) { |
---|
654 | ResolvExpr::EqvClass eqvClass; |
---|
655 | assert( env ); |
---|
656 | if ( tyParm->second == TypeDecl::Any ) { |
---|
657 | Type *concrete = env->lookup( tyParm->first ); |
---|
658 | if ( concrete ) { |
---|
659 | arg = appExpr->get_args().insert( arg, new SizeofExpr( concrete->clone() ) ); |
---|
660 | arg++; |
---|
661 | arg = appExpr->get_args().insert( arg, new AlignofExpr( concrete->clone() ) ); |
---|
662 | arg++; |
---|
663 | } else { |
---|
664 | throw SemanticError( "unbound type variable in application ", appExpr ); |
---|
665 | } // if |
---|
666 | } // if |
---|
667 | } // for |
---|
668 | |
---|
669 | // add size/align for generic types to parameter list |
---|
670 | if ( appExpr->get_function()->get_results().empty() ) return; |
---|
671 | FunctionType *funcType = getFunctionType( appExpr->get_function()->get_results().front() ); |
---|
672 | assert( funcType ); |
---|
673 | |
---|
674 | std::list< DeclarationWithType* >::const_iterator fnParm = funcType->get_parameters().begin(); |
---|
675 | std::list< Expression* >::const_iterator fnArg = arg; |
---|
676 | std::set< std::string > seenTypes; //< names for generic types we've seen |
---|
677 | |
---|
678 | // a polymorphic return type may need to be added to the argument list |
---|
679 | if ( polyRetType ) { |
---|
680 | Type *concRetType = replaceWithConcrete( appExpr, polyRetType ); |
---|
681 | passArgTypeVars( appExpr, polyRetType, concRetType, arg, exprTyVars, seenTypes ); |
---|
682 | } |
---|
683 | |
---|
684 | // add type information args for presently unseen types in parameter list |
---|
685 | for ( ; fnParm != funcType->get_parameters().end() && fnArg != appExpr->get_args().end(); ++fnParm, ++fnArg ) { |
---|
686 | VariableExpr *fnArgBase = getBaseVar( *fnArg ); |
---|
687 | if ( ! fnArgBase || fnArgBase->get_results().empty() ) continue; |
---|
688 | passArgTypeVars( appExpr, (*fnParm)->get_type(), fnArgBase->get_results().front(), arg, exprTyVars, seenTypes ); |
---|
689 | } |
---|
690 | } |
---|
691 | |
---|
692 | ObjectDecl *Pass1::makeTemporary( Type *type ) { |
---|
693 | ObjectDecl *newObj = new ObjectDecl( tempNamer.newName(), DeclarationNode::NoStorageClass, LinkageSpec::C, 0, type, 0 ); |
---|
694 | stmtsToAdd.push_back( new DeclStmt( noLabels, newObj ) ); |
---|
695 | return newObj; |
---|
696 | } |
---|
697 | |
---|
698 | Expression *Pass1::addRetParam( ApplicationExpr *appExpr, FunctionType *function, Type *retType, std::list< Expression *>::iterator &arg ) { |
---|
699 | // ***** Code Removal ***** After introducing a temporary variable for all return expressions, the following code appears superfluous. |
---|
700 | // if ( useRetval ) { |
---|
701 | // assert( retval ); |
---|
702 | // arg = appExpr->get_args().insert( arg, new VariableExpr( retval ) ); |
---|
703 | // arg++; |
---|
704 | // } else { |
---|
705 | |
---|
706 | // Create temporary to hold return value of polymorphic function and produce that temporary as a result |
---|
707 | // using a comma expression. Possibly change comma expression into statement expression "{}" for multiple |
---|
708 | // return values. |
---|
709 | ObjectDecl *newObj = makeTemporary( retType->clone() ); |
---|
710 | Expression *paramExpr = new VariableExpr( newObj ); |
---|
711 | |
---|
712 | // If the type of the temporary is not polymorphic, box temporary by taking its address; |
---|
713 | // otherwise the temporary is already boxed and can be used directly. |
---|
714 | if ( ! isPolyType( newObj->get_type(), scopeTyVars, env ) ) { |
---|
715 | paramExpr = new AddressExpr( paramExpr ); |
---|
716 | } // if |
---|
717 | arg = appExpr->get_args().insert( arg, paramExpr ); // add argument to function call |
---|
718 | arg++; |
---|
719 | // Build a comma expression to call the function and emulate a normal return. |
---|
720 | CommaExpr *commaExpr = new CommaExpr( appExpr, new VariableExpr( newObj ) ); |
---|
721 | commaExpr->set_env( appExpr->get_env() ); |
---|
722 | appExpr->set_env( 0 ); |
---|
723 | return commaExpr; |
---|
724 | // } // if |
---|
725 | // return appExpr; |
---|
726 | } |
---|
727 | |
---|
728 | void Pass1::replaceParametersWithConcrete( ApplicationExpr *appExpr, std::list< Expression* >& params ) { |
---|
729 | for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) { |
---|
730 | TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param ); |
---|
731 | assert(paramType && "Aggregate parameters should be type expressions"); |
---|
732 | paramType->set_type( replaceWithConcrete( appExpr, paramType->get_type(), false ) ); |
---|
733 | } |
---|
734 | } |
---|
735 | |
---|
736 | Type *Pass1::replaceWithConcrete( ApplicationExpr *appExpr, Type *type, bool doClone ) { |
---|
737 | if ( TypeInstType *typeInst = dynamic_cast< TypeInstType * >( type ) ) { |
---|
738 | Type *concrete = env->lookup( typeInst->get_name() ); |
---|
739 | if ( concrete == 0 ) { |
---|
740 | throw SemanticError( "Unbound type variable " + typeInst->get_name() + " in ", appExpr ); |
---|
741 | } // if |
---|
742 | return concrete; |
---|
743 | } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) { |
---|
744 | if ( doClone ) { |
---|
745 | structType = structType->clone(); |
---|
746 | } |
---|
747 | replaceParametersWithConcrete( appExpr, structType->get_parameters() ); |
---|
748 | return structType; |
---|
749 | } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) { |
---|
750 | if ( doClone ) { |
---|
751 | unionType = unionType->clone(); |
---|
752 | } |
---|
753 | replaceParametersWithConcrete( appExpr, unionType->get_parameters() ); |
---|
754 | return unionType; |
---|
755 | } |
---|
756 | return type; |
---|
757 | } |
---|
758 | |
---|
759 | Expression *Pass1::addPolyRetParam( ApplicationExpr *appExpr, FunctionType *function, ReferenceToType *polyType, std::list< Expression *>::iterator &arg ) { |
---|
760 | assert( env ); |
---|
761 | Type *concrete = replaceWithConcrete( appExpr, polyType ); |
---|
762 | // add out-parameter for return value |
---|
763 | return addRetParam( appExpr, function, concrete, arg ); |
---|
764 | } |
---|
765 | |
---|
766 | Expression *Pass1::applyAdapter( ApplicationExpr *appExpr, FunctionType *function, std::list< Expression *>::iterator &arg, const TyVarMap &tyVars ) { |
---|
767 | Expression *ret = appExpr; |
---|
768 | if ( ! function->get_returnVals().empty() && isPolyType( function->get_returnVals().front()->get_type(), tyVars ) ) { |
---|
769 | ret = addRetParam( appExpr, function, function->get_returnVals().front()->get_type(), arg ); |
---|
770 | } // if |
---|
771 | std::string mangleName = mangleAdapterName( function, tyVars ); |
---|
772 | std::string adapterName = makeAdapterName( mangleName ); |
---|
773 | |
---|
774 | // cast adaptee to void (*)(), since it may have any type inside a polymorphic function |
---|
775 | Type * adapteeType = new PointerType( Type::Qualifiers(), new FunctionType( Type::Qualifiers(), true ) ); |
---|
776 | appExpr->get_args().push_front( new CastExpr( appExpr->get_function(), adapteeType ) ); |
---|
777 | appExpr->set_function( new NameExpr( adapterName ) ); |
---|
778 | |
---|
779 | return ret; |
---|
780 | } |
---|
781 | |
---|
782 | void Pass1::boxParam( Type *param, Expression *&arg, const TyVarMap &exprTyVars ) { |
---|
783 | assert( ! arg->get_results().empty() ); |
---|
784 | if ( isPolyType( param, exprTyVars ) ) { |
---|
785 | if ( isPolyType( arg->get_results().front() ) ) { |
---|
786 | // if the argument's type is polymorphic, we don't need to box again! |
---|
787 | return; |
---|
788 | } else if ( arg->get_results().front()->get_isLvalue() ) { |
---|
789 | // VariableExpr and MemberExpr are lvalues |
---|
790 | arg = new AddressExpr( arg ); |
---|
791 | } else { |
---|
792 | // use type computed in unification to declare boxed variables |
---|
793 | Type * newType = param->clone(); |
---|
794 | if ( env ) env->apply( newType ); |
---|
795 | ObjectDecl *newObj = new ObjectDecl( tempNamer.newName(), DeclarationNode::NoStorageClass, LinkageSpec::C, 0, newType, 0 ); |
---|
796 | newObj->get_type()->get_qualifiers() = Type::Qualifiers(); // TODO: is this right??? |
---|
797 | stmtsToAdd.push_back( new DeclStmt( noLabels, newObj ) ); |
---|
798 | UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) ); |
---|
799 | assign->get_args().push_back( new VariableExpr( newObj ) ); |
---|
800 | assign->get_args().push_back( arg ); |
---|
801 | stmtsToAdd.push_back( new ExprStmt( noLabels, assign ) ); |
---|
802 | arg = new AddressExpr( new VariableExpr( newObj ) ); |
---|
803 | } // if |
---|
804 | } // if |
---|
805 | } |
---|
806 | |
---|
807 | /// cast parameters to polymorphic functions so that types are replaced with |
---|
808 | /// void * if they are type parameters in the formal type. |
---|
809 | /// this gets rid of warnings from gcc. |
---|
810 | void addCast( Expression *&actual, Type *formal, const TyVarMap &tyVars ) { |
---|
811 | Type * newType = formal->clone(); |
---|
812 | if ( getFunctionType( newType ) ) { |
---|
813 | newType = ScrubTyVars::scrub( newType, tyVars ); |
---|
814 | actual = new CastExpr( actual, newType ); |
---|
815 | } // if |
---|
816 | } |
---|
817 | |
---|
818 | void Pass1::boxParams( ApplicationExpr *appExpr, FunctionType *function, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars ) { |
---|
819 | for ( std::list< DeclarationWithType *>::const_iterator param = function->get_parameters().begin(); param != function->get_parameters().end(); ++param, ++arg ) { |
---|
820 | assert( arg != appExpr->get_args().end() ); |
---|
821 | addCast( *arg, (*param)->get_type(), exprTyVars ); |
---|
822 | boxParam( (*param)->get_type(), *arg, exprTyVars ); |
---|
823 | } // for |
---|
824 | } |
---|
825 | |
---|
826 | void Pass1::addInferredParams( ApplicationExpr *appExpr, FunctionType *functionType, std::list< Expression *>::iterator &arg, const TyVarMap &tyVars ) { |
---|
827 | std::list< Expression *>::iterator cur = arg; |
---|
828 | for ( std::list< TypeDecl *>::iterator tyVar = functionType->get_forall().begin(); tyVar != functionType->get_forall().end(); ++tyVar ) { |
---|
829 | for ( std::list< DeclarationWithType *>::iterator assert = (*tyVar)->get_assertions().begin(); assert != (*tyVar)->get_assertions().end(); ++assert ) { |
---|
830 | InferredParams::const_iterator inferParam = appExpr->get_inferParams().find( (*assert)->get_uniqueId() ); |
---|
831 | assert( inferParam != appExpr->get_inferParams().end() && "NOTE: Explicit casts of polymorphic functions to compatible monomorphic functions are currently unsupported" ); |
---|
832 | Expression *newExpr = inferParam->second.expr->clone(); |
---|
833 | addCast( newExpr, (*assert)->get_type(), tyVars ); |
---|
834 | boxParam( (*assert)->get_type(), newExpr, tyVars ); |
---|
835 | appExpr->get_args().insert( cur, newExpr ); |
---|
836 | } // for |
---|
837 | } // for |
---|
838 | } |
---|
839 | |
---|
840 | void makeRetParm( FunctionType *funcType ) { |
---|
841 | DeclarationWithType *retParm = funcType->get_returnVals().front(); |
---|
842 | |
---|
843 | // make a new parameter that is a pointer to the type of the old return value |
---|
844 | retParm->set_type( new PointerType( Type::Qualifiers(), retParm->get_type() ) ); |
---|
845 | funcType->get_parameters().push_front( retParm ); |
---|
846 | |
---|
847 | // we don't need the return value any more |
---|
848 | funcType->get_returnVals().clear(); |
---|
849 | } |
---|
850 | |
---|
851 | FunctionType *makeAdapterType( FunctionType *adaptee, const TyVarMap &tyVars ) { |
---|
852 | // actually make the adapter type |
---|
853 | FunctionType *adapter = adaptee->clone(); |
---|
854 | if ( ! adapter->get_returnVals().empty() && isPolyType( adapter->get_returnVals().front()->get_type(), tyVars ) ) { |
---|
855 | makeRetParm( adapter ); |
---|
856 | } // if |
---|
857 | adapter->get_parameters().push_front( new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new PointerType( Type::Qualifiers(), new FunctionType( Type::Qualifiers(), true ) ), 0 ) ); |
---|
858 | return adapter; |
---|
859 | } |
---|
860 | |
---|
861 | Expression *makeAdapterArg( DeclarationWithType *param, DeclarationWithType *arg, DeclarationWithType *realParam, const TyVarMap &tyVars ) { |
---|
862 | assert( param ); |
---|
863 | assert( arg ); |
---|
864 | if ( isPolyType( realParam->get_type(), tyVars ) ) { |
---|
865 | if ( ! isPolyType( arg->get_type() ) ) { |
---|
866 | UntypedExpr *deref = new UntypedExpr( new NameExpr( "*?" ) ); |
---|
867 | deref->get_args().push_back( new CastExpr( new VariableExpr( param ), new PointerType( Type::Qualifiers(), arg->get_type()->clone() ) ) ); |
---|
868 | deref->get_results().push_back( arg->get_type()->clone() ); |
---|
869 | return deref; |
---|
870 | } // if |
---|
871 | } // if |
---|
872 | return new VariableExpr( param ); |
---|
873 | } |
---|
874 | |
---|
875 | void addAdapterParams( ApplicationExpr *adapteeApp, std::list< DeclarationWithType *>::iterator arg, std::list< DeclarationWithType *>::iterator param, std::list< DeclarationWithType *>::iterator paramEnd, std::list< DeclarationWithType *>::iterator realParam, const TyVarMap &tyVars ) { |
---|
876 | UniqueName paramNamer( "_p" ); |
---|
877 | for ( ; param != paramEnd; ++param, ++arg, ++realParam ) { |
---|
878 | if ( (*param)->get_name() == "" ) { |
---|
879 | (*param)->set_name( paramNamer.newName() ); |
---|
880 | (*param)->set_linkage( LinkageSpec::C ); |
---|
881 | } // if |
---|
882 | adapteeApp->get_args().push_back( makeAdapterArg( *param, *arg, *realParam, tyVars ) ); |
---|
883 | } // for |
---|
884 | } |
---|
885 | |
---|
886 | |
---|
887 | |
---|
888 | FunctionDecl *Pass1::makeAdapter( FunctionType *adaptee, FunctionType *realType, const std::string &mangleName, const TyVarMap &tyVars ) { |
---|
889 | FunctionType *adapterType = makeAdapterType( adaptee, tyVars ); |
---|
890 | adapterType = ScrubTyVars::scrub( adapterType, tyVars ); |
---|
891 | DeclarationWithType *adapteeDecl = adapterType->get_parameters().front(); |
---|
892 | adapteeDecl->set_name( "_adaptee" ); |
---|
893 | ApplicationExpr *adapteeApp = new ApplicationExpr( new CastExpr( new VariableExpr( adapteeDecl ), new PointerType( Type::Qualifiers(), realType ) ) ); |
---|
894 | Statement *bodyStmt; |
---|
895 | |
---|
896 | std::list< TypeDecl *>::iterator tyArg = realType->get_forall().begin(); |
---|
897 | std::list< TypeDecl *>::iterator tyParam = adapterType->get_forall().begin(); |
---|
898 | std::list< TypeDecl *>::iterator realTyParam = adaptee->get_forall().begin(); |
---|
899 | for ( ; tyParam != adapterType->get_forall().end(); ++tyArg, ++tyParam, ++realTyParam ) { |
---|
900 | assert( tyArg != realType->get_forall().end() ); |
---|
901 | std::list< DeclarationWithType *>::iterator assertArg = (*tyArg)->get_assertions().begin(); |
---|
902 | std::list< DeclarationWithType *>::iterator assertParam = (*tyParam)->get_assertions().begin(); |
---|
903 | std::list< DeclarationWithType *>::iterator realAssertParam = (*realTyParam)->get_assertions().begin(); |
---|
904 | for ( ; assertParam != (*tyParam)->get_assertions().end(); ++assertArg, ++assertParam, ++realAssertParam ) { |
---|
905 | assert( assertArg != (*tyArg)->get_assertions().end() ); |
---|
906 | adapteeApp->get_args().push_back( makeAdapterArg( *assertParam, *assertArg, *realAssertParam, tyVars ) ); |
---|
907 | } // for |
---|
908 | } // for |
---|
909 | |
---|
910 | std::list< DeclarationWithType *>::iterator arg = realType->get_parameters().begin(); |
---|
911 | std::list< DeclarationWithType *>::iterator param = adapterType->get_parameters().begin(); |
---|
912 | std::list< DeclarationWithType *>::iterator realParam = adaptee->get_parameters().begin(); |
---|
913 | param++; // skip adaptee parameter |
---|
914 | if ( realType->get_returnVals().empty() ) { |
---|
915 | addAdapterParams( adapteeApp, arg, param, adapterType->get_parameters().end(), realParam, tyVars ); |
---|
916 | bodyStmt = new ExprStmt( noLabels, adapteeApp ); |
---|
917 | } else if ( isPolyType( adaptee->get_returnVals().front()->get_type(), tyVars ) ) { |
---|
918 | if ( (*param)->get_name() == "" ) { |
---|
919 | (*param)->set_name( "_ret" ); |
---|
920 | (*param)->set_linkage( LinkageSpec::C ); |
---|
921 | } // if |
---|
922 | UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) ); |
---|
923 | UntypedExpr *deref = new UntypedExpr( new NameExpr( "*?" ) ); |
---|
924 | deref->get_args().push_back( new CastExpr( new VariableExpr( *param++ ), new PointerType( Type::Qualifiers(), realType->get_returnVals().front()->get_type()->clone() ) ) ); |
---|
925 | assign->get_args().push_back( deref ); |
---|
926 | addAdapterParams( adapteeApp, arg, param, adapterType->get_parameters().end(), realParam, tyVars ); |
---|
927 | assign->get_args().push_back( adapteeApp ); |
---|
928 | bodyStmt = new ExprStmt( noLabels, assign ); |
---|
929 | } else { |
---|
930 | // adapter for a function that returns a monomorphic value |
---|
931 | addAdapterParams( adapteeApp, arg, param, adapterType->get_parameters().end(), realParam, tyVars ); |
---|
932 | bodyStmt = new ReturnStmt( noLabels, adapteeApp ); |
---|
933 | } // if |
---|
934 | CompoundStmt *adapterBody = new CompoundStmt( noLabels ); |
---|
935 | adapterBody->get_kids().push_back( bodyStmt ); |
---|
936 | std::string adapterName = makeAdapterName( mangleName ); |
---|
937 | return new FunctionDecl( adapterName, DeclarationNode::NoStorageClass, LinkageSpec::C, adapterType, adapterBody, false, false ); |
---|
938 | } |
---|
939 | |
---|
940 | void Pass1::passAdapters( ApplicationExpr * appExpr, FunctionType * functionType, const TyVarMap & exprTyVars ) { |
---|
941 | // collect a list of function types passed as parameters or implicit parameters (assertions) |
---|
942 | std::list< DeclarationWithType *> ¶mList = functionType->get_parameters(); |
---|
943 | std::list< FunctionType *> functions; |
---|
944 | for ( std::list< TypeDecl *>::iterator tyVar = functionType->get_forall().begin(); tyVar != functionType->get_forall().end(); ++tyVar ) { |
---|
945 | for ( std::list< DeclarationWithType *>::iterator assert = (*tyVar)->get_assertions().begin(); assert != (*tyVar)->get_assertions().end(); ++assert ) { |
---|
946 | findFunction( (*assert)->get_type(), functions, exprTyVars, needsAdapter ); |
---|
947 | } // for |
---|
948 | } // for |
---|
949 | for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) { |
---|
950 | findFunction( (*arg)->get_type(), functions, exprTyVars, needsAdapter ); |
---|
951 | } // for |
---|
952 | |
---|
953 | // parameter function types for which an appropriate adapter has been generated. we cannot use the types |
---|
954 | // after applying substitutions, since two different parameter types may be unified to the same type |
---|
955 | std::set< std::string > adaptersDone; |
---|
956 | |
---|
957 | for ( std::list< FunctionType *>::iterator funType = functions.begin(); funType != functions.end(); ++funType ) { |
---|
958 | FunctionType *originalFunction = (*funType)->clone(); |
---|
959 | FunctionType *realFunction = (*funType)->clone(); |
---|
960 | std::string mangleName = SymTab::Mangler::mangle( realFunction ); |
---|
961 | |
---|
962 | // only attempt to create an adapter or pass one as a parameter if we haven't already done so for this |
---|
963 | // pre-substitution parameter function type. |
---|
964 | if ( adaptersDone.find( mangleName ) == adaptersDone.end() ) { |
---|
965 | adaptersDone.insert( adaptersDone.begin(), mangleName ); |
---|
966 | |
---|
967 | // apply substitution to type variables to figure out what the adapter's type should look like |
---|
968 | assert( env ); |
---|
969 | env->apply( realFunction ); |
---|
970 | mangleName = SymTab::Mangler::mangle( realFunction ); |
---|
971 | mangleName += makePolyMonoSuffix( originalFunction, exprTyVars ); |
---|
972 | |
---|
973 | AdapterMap & adapters = Pass1::adapters.top(); |
---|
974 | AdapterMap::iterator adapter = adapters.find( mangleName ); |
---|
975 | if ( adapter == adapters.end() ) { |
---|
976 | // adapter has not been created yet in the current scope, so define it |
---|
977 | FunctionDecl *newAdapter = makeAdapter( *funType, realFunction, mangleName, exprTyVars ); |
---|
978 | adapter = adapters.insert( adapters.begin(), std::pair< std::string, DeclarationWithType *>( mangleName, newAdapter ) ); |
---|
979 | stmtsToAdd.push_back( new DeclStmt( noLabels, newAdapter ) ); |
---|
980 | } // if |
---|
981 | assert( adapter != adapters.end() ); |
---|
982 | |
---|
983 | // add the appropriate adapter as a parameter |
---|
984 | appExpr->get_args().push_front( new VariableExpr( adapter->second ) ); |
---|
985 | } // if |
---|
986 | } // for |
---|
987 | } // passAdapters |
---|
988 | |
---|
989 | Expression *makeIncrDecrExpr( ApplicationExpr *appExpr, Type *polyType, bool isIncr ) { |
---|
990 | NameExpr *opExpr; |
---|
991 | if ( isIncr ) { |
---|
992 | opExpr = new NameExpr( "?+=?" ); |
---|
993 | } else { |
---|
994 | opExpr = new NameExpr( "?-=?" ); |
---|
995 | } // if |
---|
996 | UntypedExpr *addAssign = new UntypedExpr( opExpr ); |
---|
997 | if ( AddressExpr *address = dynamic_cast< AddressExpr *>( appExpr->get_args().front() ) ) { |
---|
998 | addAssign->get_args().push_back( address->get_arg() ); |
---|
999 | } else { |
---|
1000 | addAssign->get_args().push_back( appExpr->get_args().front() ); |
---|
1001 | } // if |
---|
1002 | addAssign->get_args().push_back( new NameExpr( sizeofName( polyType ) ) ); |
---|
1003 | addAssign->get_results().front() = appExpr->get_results().front()->clone(); |
---|
1004 | if ( appExpr->get_env() ) { |
---|
1005 | addAssign->set_env( appExpr->get_env() ); |
---|
1006 | appExpr->set_env( 0 ); |
---|
1007 | } // if |
---|
1008 | appExpr->get_args().clear(); |
---|
1009 | delete appExpr; |
---|
1010 | return addAssign; |
---|
1011 | } |
---|
1012 | |
---|
1013 | Expression *Pass1::handleIntrinsics( ApplicationExpr *appExpr ) { |
---|
1014 | if ( VariableExpr *varExpr = dynamic_cast< VariableExpr *>( appExpr->get_function() ) ) { |
---|
1015 | if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic ) { |
---|
1016 | if ( varExpr->get_var()->get_name() == "?[?]" ) { |
---|
1017 | assert( ! appExpr->get_results().empty() ); |
---|
1018 | assert( appExpr->get_args().size() == 2 ); |
---|
1019 | Type *baseType1 = isPolyPtr( appExpr->get_args().front()->get_results().front(), scopeTyVars, env ); |
---|
1020 | Type *baseType2 = isPolyPtr( appExpr->get_args().back()->get_results().front(), scopeTyVars, env ); |
---|
1021 | assert( ! baseType1 || ! baseType2 ); // the arguments cannot both be polymorphic pointers |
---|
1022 | UntypedExpr *ret = 0; |
---|
1023 | if ( baseType1 || baseType2 ) { // one of the arguments is a polymorphic pointer |
---|
1024 | ret = new UntypedExpr( new NameExpr( "?+?" ) ); |
---|
1025 | } // if |
---|
1026 | if ( baseType1 ) { |
---|
1027 | UntypedExpr *multiply = new UntypedExpr( new NameExpr( "?*?" ) ); |
---|
1028 | multiply->get_args().push_back( appExpr->get_args().back() ); |
---|
1029 | multiply->get_args().push_back( new NameExpr( sizeofName( baseType1 ) ) ); |
---|
1030 | ret->get_args().push_back( appExpr->get_args().front() ); |
---|
1031 | ret->get_args().push_back( multiply ); |
---|
1032 | } else if ( baseType2 ) { |
---|
1033 | UntypedExpr *multiply = new UntypedExpr( new NameExpr( "?*?" ) ); |
---|
1034 | multiply->get_args().push_back( appExpr->get_args().front() ); |
---|
1035 | multiply->get_args().push_back( new NameExpr( sizeofName( baseType2 ) ) ); |
---|
1036 | ret->get_args().push_back( multiply ); |
---|
1037 | ret->get_args().push_back( appExpr->get_args().back() ); |
---|
1038 | } // if |
---|
1039 | if ( baseType1 || baseType2 ) { |
---|
1040 | ret->get_results().push_front( appExpr->get_results().front()->clone() ); |
---|
1041 | if ( appExpr->get_env() ) { |
---|
1042 | ret->set_env( appExpr->get_env() ); |
---|
1043 | appExpr->set_env( 0 ); |
---|
1044 | } // if |
---|
1045 | appExpr->get_args().clear(); |
---|
1046 | delete appExpr; |
---|
1047 | return ret; |
---|
1048 | } // if |
---|
1049 | } else if ( varExpr->get_var()->get_name() == "*?" ) { |
---|
1050 | assert( ! appExpr->get_results().empty() ); |
---|
1051 | assert( ! appExpr->get_args().empty() ); |
---|
1052 | if ( isPolyType( appExpr->get_results().front(), scopeTyVars, env ) ) { |
---|
1053 | Expression *ret = appExpr->get_args().front(); |
---|
1054 | delete ret->get_results().front(); |
---|
1055 | ret->get_results().front() = appExpr->get_results().front()->clone(); |
---|
1056 | if ( appExpr->get_env() ) { |
---|
1057 | ret->set_env( appExpr->get_env() ); |
---|
1058 | appExpr->set_env( 0 ); |
---|
1059 | } // if |
---|
1060 | appExpr->get_args().clear(); |
---|
1061 | delete appExpr; |
---|
1062 | return ret; |
---|
1063 | } // if |
---|
1064 | } else if ( varExpr->get_var()->get_name() == "?++" || varExpr->get_var()->get_name() == "?--" ) { |
---|
1065 | assert( ! appExpr->get_results().empty() ); |
---|
1066 | assert( appExpr->get_args().size() == 1 ); |
---|
1067 | if ( Type *baseType = isPolyPtr( appExpr->get_results().front(), scopeTyVars, env ) ) { |
---|
1068 | Type *tempType = appExpr->get_results().front()->clone(); |
---|
1069 | if ( env ) { |
---|
1070 | env->apply( tempType ); |
---|
1071 | } // if |
---|
1072 | ObjectDecl *newObj = makeTemporary( tempType ); |
---|
1073 | VariableExpr *tempExpr = new VariableExpr( newObj ); |
---|
1074 | UntypedExpr *assignExpr = new UntypedExpr( new NameExpr( "?=?" ) ); |
---|
1075 | assignExpr->get_args().push_back( tempExpr->clone() ); |
---|
1076 | if ( AddressExpr *address = dynamic_cast< AddressExpr *>( appExpr->get_args().front() ) ) { |
---|
1077 | assignExpr->get_args().push_back( address->get_arg()->clone() ); |
---|
1078 | } else { |
---|
1079 | assignExpr->get_args().push_back( appExpr->get_args().front()->clone() ); |
---|
1080 | } // if |
---|
1081 | CommaExpr *firstComma = new CommaExpr( assignExpr, makeIncrDecrExpr( appExpr, baseType, varExpr->get_var()->get_name() == "?++" ) ); |
---|
1082 | return new CommaExpr( firstComma, tempExpr ); |
---|
1083 | } // if |
---|
1084 | } else if ( varExpr->get_var()->get_name() == "++?" || varExpr->get_var()->get_name() == "--?" ) { |
---|
1085 | assert( ! appExpr->get_results().empty() ); |
---|
1086 | assert( appExpr->get_args().size() == 1 ); |
---|
1087 | if ( Type *baseType = isPolyPtr( appExpr->get_results().front(), scopeTyVars, env ) ) { |
---|
1088 | return makeIncrDecrExpr( appExpr, baseType, varExpr->get_var()->get_name() == "++?" ); |
---|
1089 | } // if |
---|
1090 | } else if ( varExpr->get_var()->get_name() == "?+?" || varExpr->get_var()->get_name() == "?-?" ) { |
---|
1091 | assert( ! appExpr->get_results().empty() ); |
---|
1092 | assert( appExpr->get_args().size() == 2 ); |
---|
1093 | Type *baseType1 = isPolyPtr( appExpr->get_args().front()->get_results().front(), scopeTyVars, env ); |
---|
1094 | Type *baseType2 = isPolyPtr( appExpr->get_args().back()->get_results().front(), scopeTyVars, env ); |
---|
1095 | if ( baseType1 && baseType2 ) { |
---|
1096 | UntypedExpr *divide = new UntypedExpr( new NameExpr( "?/?" ) ); |
---|
1097 | divide->get_args().push_back( appExpr ); |
---|
1098 | divide->get_args().push_back( new NameExpr( sizeofName( baseType1 ) ) ); |
---|
1099 | divide->get_results().push_front( appExpr->get_results().front()->clone() ); |
---|
1100 | if ( appExpr->get_env() ) { |
---|
1101 | divide->set_env( appExpr->get_env() ); |
---|
1102 | appExpr->set_env( 0 ); |
---|
1103 | } // if |
---|
1104 | return divide; |
---|
1105 | } else if ( baseType1 ) { |
---|
1106 | UntypedExpr *multiply = new UntypedExpr( new NameExpr( "?*?" ) ); |
---|
1107 | multiply->get_args().push_back( appExpr->get_args().back() ); |
---|
1108 | multiply->get_args().push_back( new NameExpr( sizeofName( baseType1 ) ) ); |
---|
1109 | appExpr->get_args().back() = multiply; |
---|
1110 | } else if ( baseType2 ) { |
---|
1111 | UntypedExpr *multiply = new UntypedExpr( new NameExpr( "?*?" ) ); |
---|
1112 | multiply->get_args().push_back( appExpr->get_args().front() ); |
---|
1113 | multiply->get_args().push_back( new NameExpr( sizeofName( baseType2 ) ) ); |
---|
1114 | appExpr->get_args().front() = multiply; |
---|
1115 | } // if |
---|
1116 | } else if ( varExpr->get_var()->get_name() == "?+=?" || varExpr->get_var()->get_name() == "?-=?" ) { |
---|
1117 | assert( ! appExpr->get_results().empty() ); |
---|
1118 | assert( appExpr->get_args().size() == 2 ); |
---|
1119 | Type *baseType = isPolyPtr( appExpr->get_results().front(), scopeTyVars, env ); |
---|
1120 | if ( baseType ) { |
---|
1121 | UntypedExpr *multiply = new UntypedExpr( new NameExpr( "?*?" ) ); |
---|
1122 | multiply->get_args().push_back( appExpr->get_args().back() ); |
---|
1123 | multiply->get_args().push_back( new NameExpr( sizeofName( baseType ) ) ); |
---|
1124 | appExpr->get_args().back() = multiply; |
---|
1125 | } // if |
---|
1126 | } // if |
---|
1127 | return appExpr; |
---|
1128 | } // if |
---|
1129 | } // if |
---|
1130 | return 0; |
---|
1131 | } |
---|
1132 | |
---|
1133 | Expression *Pass1::mutate( ApplicationExpr *appExpr ) { |
---|
1134 | // std::cerr << "mutate appExpr: "; |
---|
1135 | // for ( TyVarMap::iterator i = scopeTyVars.begin(); i != scopeTyVars.end(); ++i ) { |
---|
1136 | // std::cerr << i->first << " "; |
---|
1137 | // } |
---|
1138 | // std::cerr << "\n"; |
---|
1139 | bool oldUseRetval = useRetval; |
---|
1140 | useRetval = false; |
---|
1141 | appExpr->get_function()->acceptMutator( *this ); |
---|
1142 | mutateAll( appExpr->get_args(), *this ); |
---|
1143 | useRetval = oldUseRetval; |
---|
1144 | |
---|
1145 | assert( ! appExpr->get_function()->get_results().empty() ); |
---|
1146 | PointerType *pointer = dynamic_cast< PointerType *>( appExpr->get_function()->get_results().front() ); |
---|
1147 | assert( pointer ); |
---|
1148 | FunctionType *function = dynamic_cast< FunctionType *>( pointer->get_base() ); |
---|
1149 | assert( function ); |
---|
1150 | |
---|
1151 | if ( Expression *newExpr = handleIntrinsics( appExpr ) ) { |
---|
1152 | return newExpr; |
---|
1153 | } // if |
---|
1154 | |
---|
1155 | Expression *ret = appExpr; |
---|
1156 | |
---|
1157 | std::list< Expression *>::iterator arg = appExpr->get_args().begin(); |
---|
1158 | std::list< Expression *>::iterator paramBegin = appExpr->get_args().begin(); |
---|
1159 | |
---|
1160 | TyVarMap exprTyVars; |
---|
1161 | makeTyVarMap( function, exprTyVars ); |
---|
1162 | ReferenceToType *polyRetType = isPolyRet( function ); |
---|
1163 | |
---|
1164 | if ( polyRetType ) { |
---|
1165 | ret = addPolyRetParam( appExpr, function, polyRetType, arg ); |
---|
1166 | } else if ( needsAdapter( function, scopeTyVars ) ) { |
---|
1167 | // std::cerr << "needs adapter: "; |
---|
1168 | // for ( TyVarMap::iterator i = scopeTyVars.begin(); i != scopeTyVars.end(); ++i ) { |
---|
1169 | // std::cerr << i->first << " "; |
---|
1170 | // } |
---|
1171 | // std::cerr << "\n"; |
---|
1172 | // change the application so it calls the adapter rather than the passed function |
---|
1173 | ret = applyAdapter( appExpr, function, arg, scopeTyVars ); |
---|
1174 | } // if |
---|
1175 | arg = appExpr->get_args().begin(); |
---|
1176 | |
---|
1177 | passTypeVars( appExpr, polyRetType, arg, exprTyVars ); |
---|
1178 | addInferredParams( appExpr, function, arg, exprTyVars ); |
---|
1179 | |
---|
1180 | arg = paramBegin; |
---|
1181 | |
---|
1182 | boxParams( appExpr, function, arg, exprTyVars ); |
---|
1183 | |
---|
1184 | passAdapters( appExpr, function, exprTyVars ); |
---|
1185 | |
---|
1186 | return ret; |
---|
1187 | } |
---|
1188 | |
---|
1189 | Expression *Pass1::mutate( UntypedExpr *expr ) { |
---|
1190 | if ( ! expr->get_results().empty() && isPolyType( expr->get_results().front(), scopeTyVars, env ) ) { |
---|
1191 | if ( NameExpr *name = dynamic_cast< NameExpr *>( expr->get_function() ) ) { |
---|
1192 | if ( name->get_name() == "*?" ) { |
---|
1193 | Expression *ret = expr->get_args().front(); |
---|
1194 | expr->get_args().clear(); |
---|
1195 | delete expr; |
---|
1196 | return ret->acceptMutator( *this ); |
---|
1197 | } // if |
---|
1198 | } // if |
---|
1199 | } // if |
---|
1200 | return PolyMutator::mutate( expr ); |
---|
1201 | } |
---|
1202 | |
---|
1203 | Expression *Pass1::mutate( AddressExpr *addrExpr ) { |
---|
1204 | assert( ! addrExpr->get_arg()->get_results().empty() ); |
---|
1205 | |
---|
1206 | bool needs = false; |
---|
1207 | if ( UntypedExpr *expr = dynamic_cast< UntypedExpr *>( addrExpr->get_arg() ) ) { |
---|
1208 | if ( ! expr->get_results().empty() && isPolyType( expr->get_results().front(), scopeTyVars, env ) ) { |
---|
1209 | if ( NameExpr *name = dynamic_cast< NameExpr *>( expr->get_function() ) ) { |
---|
1210 | if ( name->get_name() == "*?" ) { |
---|
1211 | if ( ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( expr->get_args().front() ) ) { |
---|
1212 | assert( ! appExpr->get_function()->get_results().empty() ); |
---|
1213 | PointerType *pointer = dynamic_cast< PointerType *>( appExpr->get_function()->get_results().front() ); |
---|
1214 | assert( pointer ); |
---|
1215 | FunctionType *function = dynamic_cast< FunctionType *>( pointer->get_base() ); |
---|
1216 | assert( function ); |
---|
1217 | needs = needsAdapter( function, scopeTyVars ); |
---|
1218 | } // if |
---|
1219 | } // if |
---|
1220 | } // if |
---|
1221 | } // if |
---|
1222 | } // if |
---|
1223 | addrExpr->set_arg( mutateExpression( addrExpr->get_arg() ) ); |
---|
1224 | if ( isPolyType( addrExpr->get_arg()->get_results().front(), scopeTyVars, env ) || needs ) { |
---|
1225 | Expression *ret = addrExpr->get_arg(); |
---|
1226 | delete ret->get_results().front(); |
---|
1227 | ret->get_results().front() = addrExpr->get_results().front()->clone(); |
---|
1228 | addrExpr->set_arg( 0 ); |
---|
1229 | delete addrExpr; |
---|
1230 | return ret; |
---|
1231 | } else { |
---|
1232 | return addrExpr; |
---|
1233 | } // if |
---|
1234 | } |
---|
1235 | |
---|
1236 | /// Wraps a function declaration in a new pointer-to-function variable expression |
---|
1237 | VariableExpr *wrapFunctionDecl( DeclarationWithType *functionDecl ) { |
---|
1238 | // line below cloned from FixFunction.cc |
---|
1239 | ObjectDecl *functionObj = new ObjectDecl( functionDecl->get_name(), functionDecl->get_storageClass(), functionDecl->get_linkage(), 0, |
---|
1240 | new PointerType( Type::Qualifiers(), functionDecl->get_type()->clone() ), 0 ); |
---|
1241 | functionObj->set_mangleName( functionDecl->get_mangleName() ); |
---|
1242 | return new VariableExpr( functionObj ); |
---|
1243 | } |
---|
1244 | |
---|
1245 | Statement * Pass1::mutate( ReturnStmt *returnStmt ) { |
---|
1246 | if ( retval && returnStmt->get_expr() ) { |
---|
1247 | assert( ! returnStmt->get_expr()->get_results().empty() ); |
---|
1248 | // ***** Code Removal ***** After introducing a temporary variable for all return expressions, the following code appears superfluous. |
---|
1249 | // if ( returnStmt->get_expr()->get_results().front()->get_isLvalue() ) { |
---|
1250 | // by this point, a cast expr on a polymorphic return value is redundant |
---|
1251 | while ( CastExpr *castExpr = dynamic_cast< CastExpr *>( returnStmt->get_expr() ) ) { |
---|
1252 | returnStmt->set_expr( castExpr->get_arg() ); |
---|
1253 | returnStmt->get_expr()->set_env( castExpr->get_env() ); |
---|
1254 | castExpr->set_env( 0 ); |
---|
1255 | castExpr->set_arg( 0 ); |
---|
1256 | delete castExpr; |
---|
1257 | } //while |
---|
1258 | |
---|
1259 | // find assignment operator for (polymorphic) return type |
---|
1260 | ApplicationExpr *assignExpr = 0; |
---|
1261 | if ( TypeInstType *typeInst = dynamic_cast< TypeInstType *>( retval->get_type() ) ) { |
---|
1262 | // find assignment operator for type variable |
---|
1263 | std::map< std::string, DeclarationWithType *>::const_iterator assignIter = assignOps.find( typeInst->get_name() ); |
---|
1264 | if ( assignIter == assignOps.end() ) { |
---|
1265 | throw SemanticError( "Attempt to return dtype or ftype object in ", returnStmt->get_expr() ); |
---|
1266 | } // if |
---|
1267 | assignExpr = new ApplicationExpr( new VariableExpr( assignIter->second ) ); |
---|
1268 | } else if ( ReferenceToType *refType = dynamic_cast< ReferenceToType *>( retval->get_type() ) ) { |
---|
1269 | // find assignment operator for generic type |
---|
1270 | DeclarationWithType *functionDecl = scopedAssignOps.find( refType ); |
---|
1271 | if ( ! functionDecl ) { |
---|
1272 | throw SemanticError( "Attempt to return dtype or ftype generic object in ", returnStmt->get_expr() ); |
---|
1273 | } |
---|
1274 | |
---|
1275 | // wrap it up in an application expression |
---|
1276 | assignExpr = new ApplicationExpr( wrapFunctionDecl( functionDecl ) ); |
---|
1277 | assignExpr->set_env( env->clone() ); |
---|
1278 | |
---|
1279 | // find each of its needed secondary assignment operators |
---|
1280 | std::list< Expression* > &tyParams = refType->get_parameters(); |
---|
1281 | std::list< TypeDecl* > &forallParams = functionDecl->get_type()->get_forall(); |
---|
1282 | std::list< Expression* >::const_iterator tyIt = tyParams.begin(); |
---|
1283 | std::list< TypeDecl* >::const_iterator forallIt = forallParams.begin(); |
---|
1284 | for ( ; tyIt != tyParams.end() && forallIt != forallParams.end(); ++tyIt, ++forallIt ) { |
---|
1285 | if ( (*forallIt)->get_kind() != TypeDecl::Any ) continue; // skip types with no assign op (ftype/dtype) |
---|
1286 | |
---|
1287 | std::list< DeclarationWithType* > &asserts = (*forallIt)->get_assertions(); |
---|
1288 | assert( ! asserts.empty() && "Type param needs assignment operator assertion" ); |
---|
1289 | DeclarationWithType *actualDecl = asserts.front(); |
---|
1290 | TypeInstType *actualType = isTypeInstAssignment( actualDecl ); |
---|
1291 | assert( actualType && "First assertion of type with assertions should be assignment operator" ); |
---|
1292 | TypeExpr *formalTypeExpr = dynamic_cast< TypeExpr* >( *tyIt ); |
---|
1293 | assert( formalTypeExpr && "type parameters must be type expressions" ); |
---|
1294 | Type *formalType = formalTypeExpr->get_type(); |
---|
1295 | assignExpr->get_env()->add( actualType->get_name(), formalType ); |
---|
1296 | |
---|
1297 | DeclarationWithType *assertAssign = 0; |
---|
1298 | if ( TypeInstType *formalTypeInstType = dynamic_cast< TypeInstType* >( formalType ) ) { |
---|
1299 | std::map< std::string, DeclarationWithType *>::const_iterator assertAssignIt = assignOps.find( formalTypeInstType->get_name() ); |
---|
1300 | if ( assertAssignIt == assignOps.end() ) { |
---|
1301 | throw SemanticError( "No assignment operation found for ", formalTypeInstType ); |
---|
1302 | } |
---|
1303 | assertAssign = assertAssignIt->second; |
---|
1304 | } else { |
---|
1305 | assertAssign = scopedAssignOps.find( formalType ); |
---|
1306 | if ( ! assertAssign ) { |
---|
1307 | throw SemanticError( "No assignment operation found for ", formalType ); |
---|
1308 | } |
---|
1309 | } |
---|
1310 | |
---|
1311 | |
---|
1312 | assignExpr->get_inferParams()[ actualDecl->get_uniqueId() ] |
---|
1313 | = ParamEntry( assertAssign->get_uniqueId(), assertAssign->get_type()->clone(), actualDecl->get_type()->clone(), wrapFunctionDecl( assertAssign ) ); |
---|
1314 | } |
---|
1315 | } |
---|
1316 | assert( assignExpr ); |
---|
1317 | |
---|
1318 | // replace return statement with appropriate assignment to out parameter |
---|
1319 | Expression *retParm = new NameExpr( retval->get_name() ); |
---|
1320 | retParm->get_results().push_back( new PointerType( Type::Qualifiers(), retval->get_type()->clone() ) ); |
---|
1321 | assignExpr->get_args().push_back( retParm ); |
---|
1322 | assignExpr->get_args().push_back( returnStmt->get_expr() ); |
---|
1323 | stmtsToAdd.push_back( new ExprStmt( noLabels, mutateExpression( assignExpr ) ) ); |
---|
1324 | // } else { |
---|
1325 | // useRetval = true; |
---|
1326 | // stmtsToAdd.push_back( new ExprStmt( noLabels, mutateExpression( returnStmt->get_expr() ) ) ); |
---|
1327 | // useRetval = false; |
---|
1328 | // } // if |
---|
1329 | returnStmt->set_expr( 0 ); |
---|
1330 | } else { |
---|
1331 | returnStmt->set_expr( mutateExpression( returnStmt->get_expr() ) ); |
---|
1332 | } // if |
---|
1333 | return returnStmt; |
---|
1334 | } |
---|
1335 | |
---|
1336 | Type * Pass1::mutate( PointerType *pointerType ) { |
---|
1337 | TyVarMap oldtyVars = scopeTyVars; |
---|
1338 | makeTyVarMap( pointerType, scopeTyVars ); |
---|
1339 | |
---|
1340 | Type *ret = Mutator::mutate( pointerType ); |
---|
1341 | |
---|
1342 | scopeTyVars = oldtyVars; |
---|
1343 | return ret; |
---|
1344 | } |
---|
1345 | |
---|
1346 | Type * Pass1::mutate( FunctionType *functionType ) { |
---|
1347 | TyVarMap oldtyVars = scopeTyVars; |
---|
1348 | makeTyVarMap( functionType, scopeTyVars ); |
---|
1349 | |
---|
1350 | Type *ret = Mutator::mutate( functionType ); |
---|
1351 | |
---|
1352 | scopeTyVars = oldtyVars; |
---|
1353 | return ret; |
---|
1354 | } |
---|
1355 | |
---|
1356 | void Pass1::doBeginScope() { |
---|
1357 | // push a copy of the current map |
---|
1358 | adapters.push(adapters.top()); |
---|
1359 | scopedAssignOps.beginScope(); |
---|
1360 | } |
---|
1361 | |
---|
1362 | void Pass1::doEndScope() { |
---|
1363 | adapters.pop(); |
---|
1364 | scopedAssignOps.endScope(); |
---|
1365 | } |
---|
1366 | |
---|
1367 | ////////////////////////////////////////// Pass2 //////////////////////////////////////////////////// |
---|
1368 | |
---|
1369 | void Pass2::addAdapters( FunctionType *functionType ) { |
---|
1370 | std::list< DeclarationWithType *> ¶mList = functionType->get_parameters(); |
---|
1371 | std::list< FunctionType *> functions; |
---|
1372 | for ( std::list< DeclarationWithType *>::iterator arg = paramList.begin(); arg != paramList.end(); ++arg ) { |
---|
1373 | Type *orig = (*arg)->get_type(); |
---|
1374 | findAndReplaceFunction( orig, functions, scopeTyVars, needsAdapter ); |
---|
1375 | (*arg)->set_type( orig ); |
---|
1376 | } |
---|
1377 | std::set< std::string > adaptersDone; |
---|
1378 | for ( std::list< FunctionType *>::iterator funType = functions.begin(); funType != functions.end(); ++funType ) { |
---|
1379 | std::string mangleName = mangleAdapterName( *funType, scopeTyVars ); |
---|
1380 | if ( adaptersDone.find( mangleName ) == adaptersDone.end() ) { |
---|
1381 | std::string adapterName = makeAdapterName( mangleName ); |
---|
1382 | paramList.push_front( new ObjectDecl( adapterName, DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new PointerType( Type::Qualifiers(), makeAdapterType( *funType, scopeTyVars ) ), 0 ) ); |
---|
1383 | adaptersDone.insert( adaptersDone.begin(), mangleName ); |
---|
1384 | } |
---|
1385 | } |
---|
1386 | // deleteAll( functions ); |
---|
1387 | } |
---|
1388 | |
---|
1389 | template< typename DeclClass > |
---|
1390 | DeclClass * Pass2::handleDecl( DeclClass *decl, Type *type ) { |
---|
1391 | DeclClass *ret = static_cast< DeclClass *>( Mutator::mutate( decl ) ); |
---|
1392 | |
---|
1393 | return ret; |
---|
1394 | } |
---|
1395 | |
---|
1396 | DeclarationWithType * Pass2::mutate( FunctionDecl *functionDecl ) { |
---|
1397 | return handleDecl( functionDecl, functionDecl->get_functionType() ); |
---|
1398 | } |
---|
1399 | |
---|
1400 | ObjectDecl * Pass2::mutate( ObjectDecl *objectDecl ) { |
---|
1401 | return handleDecl( objectDecl, objectDecl->get_type() ); |
---|
1402 | } |
---|
1403 | |
---|
1404 | TypeDecl * Pass2::mutate( TypeDecl *typeDecl ) { |
---|
1405 | scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind(); |
---|
1406 | if ( typeDecl->get_base() ) { |
---|
1407 | return handleDecl( typeDecl, typeDecl->get_base() ); |
---|
1408 | } else { |
---|
1409 | return Mutator::mutate( typeDecl ); |
---|
1410 | } |
---|
1411 | } |
---|
1412 | |
---|
1413 | TypedefDecl * Pass2::mutate( TypedefDecl *typedefDecl ) { |
---|
1414 | return handleDecl( typedefDecl, typedefDecl->get_base() ); |
---|
1415 | } |
---|
1416 | |
---|
1417 | Type * Pass2::mutate( PointerType *pointerType ) { |
---|
1418 | TyVarMap oldtyVars = scopeTyVars; |
---|
1419 | makeTyVarMap( pointerType, scopeTyVars ); |
---|
1420 | |
---|
1421 | Type *ret = Mutator::mutate( pointerType ); |
---|
1422 | |
---|
1423 | scopeTyVars = oldtyVars; |
---|
1424 | return ret; |
---|
1425 | } |
---|
1426 | |
---|
1427 | Type *Pass2::mutate( FunctionType *funcType ) { |
---|
1428 | TyVarMap oldtyVars = scopeTyVars; |
---|
1429 | makeTyVarMap( funcType, scopeTyVars ); |
---|
1430 | |
---|
1431 | // move polymorphic return type to parameter list |
---|
1432 | if ( isPolyRet( funcType ) ) { |
---|
1433 | DeclarationWithType *ret = funcType->get_returnVals().front(); |
---|
1434 | ret->set_type( new PointerType( Type::Qualifiers(), ret->get_type() ) ); |
---|
1435 | funcType->get_parameters().push_front( ret ); |
---|
1436 | funcType->get_returnVals().pop_front(); |
---|
1437 | } |
---|
1438 | |
---|
1439 | // add size/align and assertions for type parameters to parameter list |
---|
1440 | std::list< DeclarationWithType *>::iterator last = funcType->get_parameters().begin(); |
---|
1441 | std::list< DeclarationWithType *> inferredParams; |
---|
1442 | ObjectDecl newObj( "", DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), 0 ); |
---|
1443 | ObjectDecl newPtr( "", DeclarationNode::NoStorageClass, LinkageSpec::C, 0, |
---|
1444 | new PointerType( Type::Qualifiers(), new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ) ), 0 ); |
---|
1445 | // ObjectDecl *newFunPtr = new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), new FunctionType( Type::Qualifiers(), true ) ), 0 ); |
---|
1446 | for ( std::list< TypeDecl *>::const_iterator tyParm = funcType->get_forall().begin(); tyParm != funcType->get_forall().end(); ++tyParm ) { |
---|
1447 | ObjectDecl *sizeParm, *alignParm; |
---|
1448 | // add all size and alignment parameters to parameter list |
---|
1449 | if ( (*tyParm)->get_kind() == TypeDecl::Any ) { |
---|
1450 | TypeInstType parmType( Type::Qualifiers(), (*tyParm)->get_name(), *tyParm ); |
---|
1451 | |
---|
1452 | sizeParm = newObj.clone(); |
---|
1453 | sizeParm->set_name( sizeofName( &parmType ) ); |
---|
1454 | last = funcType->get_parameters().insert( last, sizeParm ); |
---|
1455 | ++last; |
---|
1456 | |
---|
1457 | alignParm = newObj.clone(); |
---|
1458 | alignParm->set_name( alignofName( &parmType ) ); |
---|
1459 | last = funcType->get_parameters().insert( last, alignParm ); |
---|
1460 | ++last; |
---|
1461 | } |
---|
1462 | // move all assertions into parameter list |
---|
1463 | for ( std::list< DeclarationWithType *>::iterator assert = (*tyParm)->get_assertions().begin(); assert != (*tyParm)->get_assertions().end(); ++assert ) { |
---|
1464 | // *assert = (*assert)->acceptMutator( *this ); |
---|
1465 | inferredParams.push_back( *assert ); |
---|
1466 | } |
---|
1467 | (*tyParm)->get_assertions().clear(); |
---|
1468 | } |
---|
1469 | |
---|
1470 | // add size/align for generic parameter types to parameter list |
---|
1471 | std::set< std::string > seenTypes; // sizeofName for generic types we've seen |
---|
1472 | for ( std::list< DeclarationWithType* >::const_iterator fnParm = last; fnParm != funcType->get_parameters().end(); ++fnParm ) { |
---|
1473 | Type *polyBase = hasPolyBase( (*fnParm)->get_type(), scopeTyVars ); |
---|
1474 | if ( polyBase && ! dynamic_cast< TypeInstType* >( polyBase ) ) { |
---|
1475 | std::string sizeName = sizeofName( polyBase ); |
---|
1476 | if ( seenTypes.count( sizeName ) ) continue; |
---|
1477 | |
---|
1478 | ObjectDecl *sizeParm, *alignParm, *offsetParm; |
---|
1479 | sizeParm = newObj.clone(); |
---|
1480 | sizeParm->set_name( sizeName ); |
---|
1481 | last = funcType->get_parameters().insert( last, sizeParm ); |
---|
1482 | ++last; |
---|
1483 | |
---|
1484 | alignParm = newObj.clone(); |
---|
1485 | alignParm->set_name( alignofName( polyBase ) ); |
---|
1486 | last = funcType->get_parameters().insert( last, alignParm ); |
---|
1487 | ++last; |
---|
1488 | |
---|
1489 | if ( dynamic_cast< StructInstType* >( polyBase ) ) { |
---|
1490 | offsetParm = newPtr.clone(); |
---|
1491 | offsetParm->set_name( offsetofName( polyBase ) ); |
---|
1492 | last = funcType->get_parameters().insert( last, offsetParm ); |
---|
1493 | ++last; |
---|
1494 | } |
---|
1495 | |
---|
1496 | seenTypes.insert( sizeName ); |
---|
1497 | } |
---|
1498 | } |
---|
1499 | |
---|
1500 | // splice assertion parameters into parameter list |
---|
1501 | funcType->get_parameters().splice( last, inferredParams ); |
---|
1502 | addAdapters( funcType ); |
---|
1503 | mutateAll( funcType->get_returnVals(), *this ); |
---|
1504 | mutateAll( funcType->get_parameters(), *this ); |
---|
1505 | |
---|
1506 | scopeTyVars = oldtyVars; |
---|
1507 | return funcType; |
---|
1508 | } |
---|
1509 | |
---|
1510 | ////////////////////////////////////////// MemberExprFixer //////////////////////////////////////////////////// |
---|
1511 | |
---|
1512 | template< typename DeclClass > |
---|
1513 | DeclClass * MemberExprFixer::handleDecl( DeclClass *decl, Type *type ) { |
---|
1514 | TyVarMap oldtyVars = scopeTyVars; |
---|
1515 | makeTyVarMap( type, scopeTyVars ); |
---|
1516 | |
---|
1517 | DeclClass *ret = static_cast< DeclClass *>( Mutator::mutate( decl ) ); |
---|
1518 | |
---|
1519 | scopeTyVars = oldtyVars; |
---|
1520 | return ret; |
---|
1521 | } |
---|
1522 | |
---|
1523 | ObjectDecl * MemberExprFixer::mutate( ObjectDecl *objectDecl ) { |
---|
1524 | return handleDecl( objectDecl, objectDecl->get_type() ); |
---|
1525 | } |
---|
1526 | |
---|
1527 | DeclarationWithType * MemberExprFixer::mutate( FunctionDecl *functionDecl ) { |
---|
1528 | return handleDecl( functionDecl, functionDecl->get_functionType() ); |
---|
1529 | } |
---|
1530 | |
---|
1531 | TypedefDecl * MemberExprFixer::mutate( TypedefDecl *typedefDecl ) { |
---|
1532 | return handleDecl( typedefDecl, typedefDecl->get_base() ); |
---|
1533 | } |
---|
1534 | |
---|
1535 | TypeDecl * MemberExprFixer::mutate( TypeDecl *typeDecl ) { |
---|
1536 | scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind(); |
---|
1537 | return Mutator::mutate( typeDecl ); |
---|
1538 | } |
---|
1539 | |
---|
1540 | Type * MemberExprFixer::mutate( PointerType *pointerType ) { |
---|
1541 | TyVarMap oldtyVars = scopeTyVars; |
---|
1542 | makeTyVarMap( pointerType, scopeTyVars ); |
---|
1543 | |
---|
1544 | Type *ret = Mutator::mutate( pointerType ); |
---|
1545 | |
---|
1546 | scopeTyVars = oldtyVars; |
---|
1547 | return ret; |
---|
1548 | } |
---|
1549 | |
---|
1550 | Type * MemberExprFixer::mutate( FunctionType *functionType ) { |
---|
1551 | TyVarMap oldtyVars = scopeTyVars; |
---|
1552 | makeTyVarMap( functionType, scopeTyVars ); |
---|
1553 | |
---|
1554 | Type *ret = Mutator::mutate( functionType ); |
---|
1555 | |
---|
1556 | scopeTyVars = oldtyVars; |
---|
1557 | return ret; |
---|
1558 | } |
---|
1559 | |
---|
1560 | Statement *MemberExprFixer::mutate( DeclStmt *declStmt ) { |
---|
1561 | if ( ObjectDecl *objectDecl = dynamic_cast< ObjectDecl *>( declStmt->get_decl() ) ) { |
---|
1562 | if ( isPolyType( objectDecl->get_type(), scopeTyVars ) ) { |
---|
1563 | // change initialization of a polymorphic value object |
---|
1564 | // to allocate storage with alloca |
---|
1565 | Type *declType = objectDecl->get_type(); |
---|
1566 | UntypedExpr *alloc = new UntypedExpr( new NameExpr( "__builtin_alloca" ) ); |
---|
1567 | alloc->get_args().push_back( new NameExpr( sizeofName( declType ) ) ); |
---|
1568 | |
---|
1569 | delete objectDecl->get_init(); |
---|
1570 | |
---|
1571 | std::list<Expression*> designators; |
---|
1572 | objectDecl->set_init( new SingleInit( alloc, designators ) ); |
---|
1573 | } |
---|
1574 | } |
---|
1575 | return Mutator::mutate( declStmt ); |
---|
1576 | } |
---|
1577 | |
---|
1578 | /// Finds the member in the base list that matches the given declaration; returns its index, or -1 if not present |
---|
1579 | long findMember( DeclarationWithType *memberDecl, std::list< Declaration* > &baseDecls ) { |
---|
1580 | long i = 0; |
---|
1581 | for(std::list< Declaration* >::const_iterator decl = baseDecls.begin(); decl != baseDecls.end(); ++decl, ++i ) { |
---|
1582 | if ( memberDecl->get_name() != (*decl)->get_name() ) continue; |
---|
1583 | |
---|
1584 | if ( DeclarationWithType *declWithType = dynamic_cast< DeclarationWithType* >( *decl ) ) { |
---|
1585 | if ( memberDecl->get_mangleName().empty() || declWithType->get_mangleName().empty() |
---|
1586 | || memberDecl->get_mangleName() == declWithType->get_mangleName() ) return i; |
---|
1587 | else continue; |
---|
1588 | } else return i; |
---|
1589 | } |
---|
1590 | return -1; |
---|
1591 | } |
---|
1592 | |
---|
1593 | /// Returns an index expression into the offset array for a type |
---|
1594 | Expression *makeOffsetIndex( Type *objectType, long i ) { |
---|
1595 | std::stringstream offset_namer; |
---|
1596 | offset_namer << i; |
---|
1597 | ConstantExpr *fieldIndex = new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), offset_namer.str() ) ); |
---|
1598 | UntypedExpr *fieldOffset = new UntypedExpr( new NameExpr( "?[?]" ) ); |
---|
1599 | fieldOffset->get_args().push_back( new NameExpr( offsetofName( objectType ) ) ); |
---|
1600 | fieldOffset->get_args().push_back( fieldIndex ); |
---|
1601 | return fieldOffset; |
---|
1602 | } |
---|
1603 | |
---|
1604 | /// Returns an expression dereferenced n times |
---|
1605 | Expression *makeDerefdVar( Expression *derefdVar, long n ) { |
---|
1606 | for ( int i = 1; i < n; ++i ) { |
---|
1607 | UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) ); |
---|
1608 | derefExpr->get_args().push_back( derefdVar ); |
---|
1609 | derefdVar = derefExpr; |
---|
1610 | } |
---|
1611 | return derefdVar; |
---|
1612 | } |
---|
1613 | |
---|
1614 | Expression *MemberExprFixer::mutate( MemberExpr *memberExpr ) { |
---|
1615 | // mutate, exiting early if no longer MemberExpr |
---|
1616 | Expression *expr = Mutator::mutate( memberExpr ); |
---|
1617 | memberExpr = dynamic_cast< MemberExpr* >( expr ); |
---|
1618 | if ( ! memberExpr ) return expr; |
---|
1619 | |
---|
1620 | // get declaration for base struct, exiting early if not found |
---|
1621 | int varDepth; |
---|
1622 | VariableExpr *varExpr = getBaseVar( memberExpr->get_aggregate(), &varDepth ); |
---|
1623 | if ( ! varExpr ) return memberExpr; |
---|
1624 | ObjectDecl *objectDecl = dynamic_cast< ObjectDecl* >( varExpr->get_var() ); |
---|
1625 | if ( ! objectDecl ) return memberExpr; |
---|
1626 | |
---|
1627 | // only mutate member expressions for polymorphic types |
---|
1628 | int tyDepth; |
---|
1629 | Type *objectType = hasPolyBase( objectDecl->get_type(), scopeTyVars, &tyDepth ); |
---|
1630 | if ( ! objectType ) return memberExpr; |
---|
1631 | |
---|
1632 | Expression *newMemberExpr = 0; |
---|
1633 | if ( StructInstType *structType = dynamic_cast< StructInstType* >( objectType ) ) { |
---|
1634 | // look up offset index |
---|
1635 | long i = findMember( memberExpr->get_member(), structType->get_baseStruct()->get_members() ); |
---|
1636 | if ( i == -1 ) return memberExpr; |
---|
1637 | |
---|
1638 | // replace member expression with pointer to base plus offset |
---|
1639 | UntypedExpr *fieldLoc = new UntypedExpr( new NameExpr( "?+?" ) ); |
---|
1640 | fieldLoc->get_args().push_back( makeDerefdVar( varExpr->clone(), varDepth ) ); |
---|
1641 | fieldLoc->get_args().push_back( makeOffsetIndex( objectType, i ) ); |
---|
1642 | newMemberExpr = fieldLoc; |
---|
1643 | } else if ( dynamic_cast< UnionInstType* >( objectType ) ) { |
---|
1644 | // union members are all at offset zero, so build appropriately-dereferenced variable |
---|
1645 | newMemberExpr = makeDerefdVar( varExpr->clone(), varDepth ); |
---|
1646 | } else return memberExpr; |
---|
1647 | assert( newMemberExpr ); |
---|
1648 | |
---|
1649 | Type *memberType = memberExpr->get_member()->get_type(); |
---|
1650 | if ( ! isPolyType( memberType, scopeTyVars ) ) { |
---|
1651 | // Not all members of a polymorphic type are themselves of polymorphic type; in this case the member expression should be wrapped and dereferenced to form an lvalue |
---|
1652 | CastExpr *ptrCastExpr = new CastExpr( newMemberExpr, new PointerType( Type::Qualifiers(), memberType->clone() ) ); |
---|
1653 | UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) ); |
---|
1654 | derefExpr->get_args().push_back( ptrCastExpr ); |
---|
1655 | newMemberExpr = derefExpr; |
---|
1656 | } |
---|
1657 | |
---|
1658 | delete memberExpr; |
---|
1659 | return newMemberExpr; |
---|
1660 | } |
---|
1661 | |
---|
1662 | Expression *MemberExprFixer::mutate( OffsetofExpr *offsetofExpr ) { |
---|
1663 | // mutate, exiting early if no longer OffsetofExpr |
---|
1664 | Expression *expr = Mutator::mutate( offsetofExpr ); |
---|
1665 | offsetofExpr = dynamic_cast< OffsetofExpr* >( expr ); |
---|
1666 | if ( ! offsetofExpr ) return expr; |
---|
1667 | |
---|
1668 | // only mutate expressions for polymorphic structs/unions |
---|
1669 | Type *ty = isPolyType( offsetofExpr->get_type(), scopeTyVars ); |
---|
1670 | if ( ! ty ) return offsetofExpr; |
---|
1671 | |
---|
1672 | if ( StructInstType *structType = dynamic_cast< StructInstType* >( ty ) ) { |
---|
1673 | // replace offsetof expression by index into offset array |
---|
1674 | long i = findMember( offsetofExpr->get_member(), structType->get_baseStruct()->get_members() ); |
---|
1675 | if ( i == -1 ) return offsetofExpr; |
---|
1676 | |
---|
1677 | Expression *offsetInd = makeOffsetIndex( ty, i ); |
---|
1678 | delete offsetofExpr; |
---|
1679 | return offsetInd; |
---|
1680 | } else if ( dynamic_cast< UnionInstType* >( ty ) ) { |
---|
1681 | // all union members are at offset zero |
---|
1682 | delete offsetofExpr; |
---|
1683 | return new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), std::string("0") ) ); |
---|
1684 | } else return offsetofExpr; |
---|
1685 | } |
---|
1686 | |
---|
1687 | ////////////////////////////////////////// Pass3 //////////////////////////////////////////////////// |
---|
1688 | |
---|
1689 | template< typename DeclClass > |
---|
1690 | DeclClass * Pass3::handleDecl( DeclClass *decl, Type *type ) { |
---|
1691 | TyVarMap oldtyVars = scopeTyVars; |
---|
1692 | makeTyVarMap( type, scopeTyVars ); |
---|
1693 | |
---|
1694 | DeclClass *ret = static_cast< DeclClass *>( Mutator::mutate( decl ) ); |
---|
1695 | ScrubTyVars::scrub( decl, scopeTyVars ); |
---|
1696 | |
---|
1697 | scopeTyVars = oldtyVars; |
---|
1698 | return ret; |
---|
1699 | } |
---|
1700 | |
---|
1701 | ObjectDecl * Pass3::mutate( ObjectDecl *objectDecl ) { |
---|
1702 | return handleDecl( objectDecl, objectDecl->get_type() ); |
---|
1703 | } |
---|
1704 | |
---|
1705 | DeclarationWithType * Pass3::mutate( FunctionDecl *functionDecl ) { |
---|
1706 | return handleDecl( functionDecl, functionDecl->get_functionType() ); |
---|
1707 | } |
---|
1708 | |
---|
1709 | TypedefDecl * Pass3::mutate( TypedefDecl *typedefDecl ) { |
---|
1710 | return handleDecl( typedefDecl, typedefDecl->get_base() ); |
---|
1711 | } |
---|
1712 | |
---|
1713 | TypeDecl * Pass3::mutate( TypeDecl *typeDecl ) { |
---|
1714 | // Initializer *init = 0; |
---|
1715 | // std::list< Expression *> designators; |
---|
1716 | // scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind(); |
---|
1717 | // if ( typeDecl->get_base() ) { |
---|
1718 | // init = new SimpleInit( new SizeofExpr( handleDecl( typeDecl, typeDecl->get_base() ) ), designators ); |
---|
1719 | // } |
---|
1720 | // return new ObjectDecl( typeDecl->get_name(), Declaration::Extern, LinkageSpec::C, 0, new BasicType( Type::Qualifiers(), BasicType::UnsignedInt ), init ); |
---|
1721 | |
---|
1722 | scopeTyVars[ typeDecl->get_name() ] = typeDecl->get_kind(); |
---|
1723 | return Mutator::mutate( typeDecl ); |
---|
1724 | } |
---|
1725 | |
---|
1726 | Type * Pass3::mutate( PointerType *pointerType ) { |
---|
1727 | TyVarMap oldtyVars = scopeTyVars; |
---|
1728 | makeTyVarMap( pointerType, scopeTyVars ); |
---|
1729 | |
---|
1730 | Type *ret = Mutator::mutate( pointerType ); |
---|
1731 | |
---|
1732 | scopeTyVars = oldtyVars; |
---|
1733 | return ret; |
---|
1734 | } |
---|
1735 | |
---|
1736 | Type * Pass3::mutate( FunctionType *functionType ) { |
---|
1737 | TyVarMap oldtyVars = scopeTyVars; |
---|
1738 | makeTyVarMap( functionType, scopeTyVars ); |
---|
1739 | |
---|
1740 | Type *ret = Mutator::mutate( functionType ); |
---|
1741 | |
---|
1742 | scopeTyVars = oldtyVars; |
---|
1743 | return ret; |
---|
1744 | } |
---|
1745 | } // anonymous namespace |
---|
1746 | } // namespace GenPoly |
---|
1747 | |
---|
1748 | // Local Variables: // |
---|
1749 | // tab-width: 4 // |
---|
1750 | // mode: c++ // |
---|
1751 | // compile-command: "make install" // |
---|
1752 | // End: // |
---|