source: src/InitTweak/InitTweak.h @ b9dae14c

arm-ehjacob/cs343-translationnew-ast-unique-expr
Last change on this file since b9dae14c was 16ba4a6, checked in by Fangren Yu <f37yu@…>, 13 months ago

factor out resolver calls in pre-resolution stage

  • Property mode set to 100644
File size: 7.5 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// InitTweak.h --
8//
9// Author           : Rob Schluntz
10// Created On       : Fri May 13 11:26:36 2016
11// Last Modified By : Andrew Beach
12// Last Modified On : Fri Jul 19 14:18:00 2019
13// Update Count     : 6
14//
15
16#pragma once
17
18#include <list>               // for list
19#include <memory>             // for shared_ptr
20#include <string>             // for string, allocator
21#include <vector>
22
23#include "AST/Fwd.hpp"        // for AST nodes
24#include "SynTree/SynTree.h"  // for Visitor Nodes
25
26// helper functions for initialization
27namespace InitTweak {
28        const FunctionDecl * isAssignment( const Declaration * decl );
29        const FunctionDecl * isDestructor( const Declaration * decl );
30        const FunctionDecl * isDefaultConstructor( const Declaration * decl );
31        const FunctionDecl * isCopyConstructor( const Declaration * decl );
32        const FunctionDecl * isCopyFunction( const Declaration * decl, const std::string & fname );
33        bool isCopyFunction( const ast::FunctionDecl * decl );
34
35        /// returns the base type of the first parameter to a constructor/destructor/assignment function
36        Type * getTypeofThis( FunctionType * ftype );
37
38        /// returns the first parameter of a constructor/destructor/assignment function
39        ObjectDecl * getParamThis( FunctionType * ftype );
40        const ast::ObjectDecl * getParamThis(const ast::FunctionDecl * func);
41
42        /// generate a bitwise assignment operation.
43        ApplicationExpr * createBitwiseAssignment( Expression * dst, Expression * src );
44
45        ast::Expr * createBitwiseAssignment( const ast::Expr * dst, const ast::Expr * src);
46
47        /// transform Initializer into an argument list that can be passed to a call expression
48        std::list< Expression * > makeInitList( Initializer * init );
49        std::vector< ast::ptr< ast::Expr > > makeInitList( const ast::Init * init );
50
51        /// True if the resolver should try to construct dwt
52        bool tryConstruct( DeclarationWithType * dwt );
53        bool tryConstruct( const ast::DeclWithType * dwt );
54
55        /// True if the type can have a user-defined constructor
56        bool isConstructable( Type * t );
57        bool isConstructable( const ast::Type * t );
58
59        /// True if the Initializer contains designations
60        bool isDesignated( Initializer * init );
61        bool isDesignated( const ast::Init * init );
62
63        /// True if the ObjectDecl's Initializer nesting level is not deeper than the depth of its
64        /// type, where the depth of its type is the number of nested ArrayTypes + 1
65        bool checkInitDepth( ObjectDecl * objDecl );
66        bool checkInitDepth( const ast::ObjectDecl * objDecl );
67
68        /// returns the declaration of the function called by the expr (must be ApplicationExpr or UntypedExpr)
69        DeclarationWithType * getFunction( Expression * expr );
70        const DeclarationWithType * getFunction( const Expression * expr );
71        const ast::DeclWithType * getFunction( const ast::Expr * expr );
72
73        /// Non-Null if expr is a call expression whose target function is intrinsic
74        ApplicationExpr * isIntrinsicCallExpr( Expression * expr );
75        const ast::ApplicationExpr * isIntrinsicCallExpr( const ast::Expr * expr);
76
77        /// True if stmt is a call statement where the function called is intrinsic and takes one parameter.
78        /// Intended to be used for default ctor/dtor calls, but might have use elsewhere.
79        /// Currently has assertions that make it less than fully general.
80        bool isIntrinsicSingleArgCallStmt( Statement * stmt );
81        bool isIntrinsicSingleArgCallStmt( const ast::Stmt * stmt );
82
83        /// True if stmt is a call statement where the function called is intrinsic.
84        bool isIntrinsicCallStmt( Statement * stmt );
85
86        /// get all Ctor/Dtor call expressions from a Statement
87        void collectCtorDtorCalls( Statement * stmt, std::list< Expression * > & matches );
88        std::vector< const ast::Expr * > collectCtorDtorCalls( const ast::Stmt * stmt );
89
90        /// get the Ctor/Dtor call expression from a Statement that looks like a generated ctor/dtor call
91        Expression * getCtorDtorCall( Statement * stmt );
92
93        /// returns the name of the function being called
94        std::string getFunctionName( Expression * expr );
95        std::string getFunctionName( const ast::Expr * expr );
96
97        /// returns the argument to a call expression in position N indexed from 0
98        Expression *& getCallArg( Expression * callExpr, unsigned int pos );
99        const ast::Expr * getCallArg( const ast::Expr * call, unsigned pos );
100
101        /// returns the base type of a PointerType or ArrayType, else returns NULL
102        Type * getPointerBase( Type * );
103        const ast::Type* getPointerBase( const ast::Type* );
104
105        /// returns the argument if it is a PointerType or ArrayType, else returns NULL
106        Type * isPointerType( Type * );
107
108        /// returns true if expr is trivially a compile-time constant
109        bool isConstExpr( Expression * expr );
110        bool isConstExpr( Initializer * init );
111
112        bool isConstExpr( const ast::Expr * expr );
113        bool isConstExpr( const ast::Init * init );
114
115        /// Modifies objDecl to have:
116        ///    __attribute__((section (".data#")))
117        /// which makes gcc put the declared variable in the data section,
118        /// which is helpful for global constants on newer gcc versions,
119        /// so that CFA's generated initialization won't segfault when writing it via a const cast.
120        /// The trailing # is an injected assembly comment, to suppress the "a" in
121        ///    .section .data,"a"
122        ///    .section .data#,"a"
123        /// to avoid assembler warning "ignoring changed section attributes for .data"
124        void addDataSectonAttribute( ObjectDecl * objDecl );
125
126        void addDataSectionAttribute( ast::ObjectDecl * objDecl );
127
128        class InitExpander_old {
129        public:
130                // expand by stepping through init to get each list of arguments
131                InitExpander_old( Initializer * init );
132
133                // always expand to expr
134                InitExpander_old( Expression * expr );
135
136                // iterator-like interface
137                std::list< Expression * > operator*();
138                InitExpander_old & operator++();
139
140                // builds statement which has the same semantics as a C-style list initializer
141                // (for array initializers) using callExpr as the base expression to perform initialization
142                Statement * buildListInit( UntypedExpr * callExpr );
143                void addArrayIndex( Expression * index, Expression * dimension );
144                void clearArrayIndices();
145                bool addReference();
146
147                class ExpanderImpl;
148
149                typedef std::list< Expression * > IndexList;
150        private:
151                std::shared_ptr< ExpanderImpl > expander;
152                std::list< Expression * > cur;
153
154                // invariant: list of size 2N (elements come in pairs [index, dimension])
155                IndexList indices;
156        };
157
158        class InitExpander_new {
159        public:
160                using IndexList = std::vector< ast::ptr< ast::Expr > >;
161                class ExpanderImpl;
162
163        private:
164                std::shared_ptr< ExpanderImpl > expander;
165                std::vector< ast::ptr< ast::Expr > > crnt;
166                // invariant: list of size 2N (elements come in pairs [index, dimension])
167                IndexList indices;
168
169        public:
170                /// Expand by stepping through init to get each list of arguments
171                InitExpander_new( const ast::Init * init );
172
173                /// Always expand to expression
174                InitExpander_new( const ast::Expr * expr );
175
176                std::vector< ast::ptr< ast::Expr > > operator* ();
177                InitExpander_new & operator++ ();
178
179                /// builds statement which has the same semantics as a C-style list initializer (for array
180                /// initializers) using callExpr as the base expression to perform initialization.
181                /// Mutates callExpr
182                ast::ptr< ast::Stmt > buildListInit( ast::UntypedExpr * callExpr );
183
184                void addArrayIndex( const ast::Expr * index, const ast::Expr * dimension );
185
186                void clearArrayIndices();
187
188                bool addReference();
189        };
190} // namespace
191
192// Local Variables: //
193// tab-width: 4 //
194// mode: c++ //
195// compile-command: "make install" //
196// End: //
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