| 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 | // ExpressionNode.cc -- |
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| 8 | // |
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| 9 | // Author : Rodolfo G. Esteves |
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| 10 | // Created On : Sat May 16 13:17:07 2015 |
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| 11 | // Last Modified By : Peter A. Buhr |
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| 12 | // Last Modified On : Thu Jul 27 21:42:38 2017 |
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| 13 | // Update Count : 567 |
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| 14 | // |
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| 15 | |
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| 16 | #include <climits> // access INT_MAX, UINT_MAX, LONG_MAX, ULONG_MAX, LLONG_MAX |
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| 17 | #include <sstream> |
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| 18 | |
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| 19 | #include "ParseNode.h" |
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| 20 | #include "TypeData.h" |
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| 21 | #include "SynTree/Constant.h" |
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| 22 | #include "SynTree/Expression.h" |
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| 23 | #include "SynTree/Declaration.h" |
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| 24 | #include "parserutility.h" |
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| 25 | |
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| 26 | using namespace std; |
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| 27 | |
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| 28 | //############################################################################## |
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| 29 | |
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| 30 | // Difficult to separate extra parts of constants during lexing because actions are not allow in the middle of patterns: |
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| 31 | // |
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| 32 | // prefix action constant action suffix |
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| 33 | // |
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| 34 | // Alternatively, breaking a pattern using BEGIN does not work if the following pattern can be empty: |
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| 35 | // |
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| 36 | // constant BEGIN CONT ... |
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| 37 | // <CONT>(...)? BEGIN 0 ... // possible empty suffix |
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| 38 | // |
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| 39 | // because the CONT rule is NOT triggered if the pattern is empty. Hence, constants are reparsed here to determine their |
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| 40 | // type. |
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| 41 | |
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| 42 | Type::Qualifiers noQualifiers; // no qualifiers on constants |
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| 43 | |
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| 44 | static inline bool checkU( char c ) { return c == 'u' || c == 'U'; } |
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| 45 | static inline bool checkL( char c ) { return c == 'l' || c == 'L'; } |
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| 46 | static inline bool checkF( char c ) { return c == 'f' || c == 'F'; } |
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| 47 | static inline bool checkD( char c ) { return c == 'd' || c == 'D'; } |
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| 48 | static inline bool checkI( char c ) { return c == 'i' || c == 'I'; } |
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| 49 | static inline bool checkX( char c ) { return c == 'x' || c == 'X'; } |
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| 50 | |
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| 51 | Expression * build_constantInteger( const std::string & str ) { |
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| 52 | static const BasicType::Kind kind[2][3] = { |
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| 53 | { BasicType::SignedInt, BasicType::LongSignedInt, BasicType::LongLongSignedInt }, |
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| 54 | { BasicType::UnsignedInt, BasicType::LongUnsignedInt, BasicType::LongLongUnsignedInt }, |
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| 55 | }; |
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| 56 | bool dec = true, Unsigned = false; // decimal, unsigned constant |
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| 57 | int size; // 0 => int, 1 => long, 2 => long long |
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| 58 | unsigned long long int v; // converted integral value |
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| 59 | size_t last = str.length() - 1; // last character of constant |
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| 60 | Expression * ret; |
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| 61 | |
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| 62 | // special constants |
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| 63 | if ( str == "0" ) { |
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| 64 | ret = new ConstantExpr( Constant( (Type *)new ZeroType( noQualifiers ), str, (unsigned long long int)0 ) ); |
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| 65 | goto CLEANUP; |
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| 66 | } // if |
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| 67 | if ( str == "1" ) { |
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| 68 | ret = new ConstantExpr( Constant( (Type *)new OneType( noQualifiers ), str, (unsigned long long int)1 ) ); |
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| 69 | goto CLEANUP; |
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| 70 | } // if |
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| 71 | |
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| 72 | if ( str[0] == '0' ) { // octal/hex constant ? |
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| 73 | dec = false; |
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| 74 | if ( last != 0 && checkX( str[1] ) ) { // hex constant ? |
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| 75 | sscanf( (char *)str.c_str(), "%llx", &v ); |
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| 76 | //printf( "%llx %llu\n", v, v ); |
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| 77 | } else { // octal constant |
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| 78 | sscanf( (char *)str.c_str(), "%llo", &v ); |
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| 79 | //printf( "%llo %llu\n", v, v ); |
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| 80 | } // if |
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| 81 | } else { // decimal constant ? |
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| 82 | sscanf( (char *)str.c_str(), "%llu", &v ); |
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| 83 | //printf( "%llu %llu\n", v, v ); |
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| 84 | } // if |
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| 85 | |
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| 86 | if ( v <= INT_MAX ) { // signed int |
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| 87 | size = 0; |
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| 88 | } else if ( v <= UINT_MAX && ! dec ) { // unsigned int |
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| 89 | size = 0; |
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| 90 | Unsigned = true; // unsigned |
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| 91 | } else if ( v <= LONG_MAX ) { // signed long int |
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| 92 | size = 1; |
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| 93 | } else if ( v <= ULONG_MAX && ( ! dec || LONG_MAX == LLONG_MAX ) ) { // signed long int |
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| 94 | size = 1; |
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| 95 | Unsigned = true; // unsigned long int |
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| 96 | } else if ( v <= LLONG_MAX ) { // signed long long int |
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| 97 | size = 2; |
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| 98 | } else { // unsigned long long int |
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| 99 | size = 2; |
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| 100 | Unsigned = true; // unsigned long long int |
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| 101 | } // if |
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| 102 | |
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| 103 | if ( checkU( str[last] ) ) { // suffix 'u' ? |
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| 104 | Unsigned = true; |
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| 105 | if ( last > 0 && checkL( str[last - 1] ) ) { // suffix 'l' ? |
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| 106 | size = 1; |
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| 107 | if ( last > 1 && checkL( str[last - 2] ) ) { // suffix 'll' ? |
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| 108 | size = 2; |
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| 109 | } // if |
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| 110 | } // if |
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| 111 | } else if ( checkL( str[ last ] ) ) { // suffix 'l' ? |
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| 112 | size = 1; |
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| 113 | if ( last > 0 && checkL( str[last - 1] ) ) { // suffix 'll' ? |
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| 114 | size = 2; |
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| 115 | if ( last > 1 && checkU( str[last - 2] ) ) { // suffix 'u' ? |
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| 116 | Unsigned = true; |
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| 117 | } // if |
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| 118 | } else { |
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| 119 | if ( last > 0 && checkU( str[last - 1] ) ) { // suffix 'u' ? |
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| 120 | Unsigned = true; |
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| 121 | } // if |
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| 122 | } // if |
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| 123 | } // if |
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| 124 | |
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| 125 | ret = new ConstantExpr( Constant( new BasicType( noQualifiers, kind[Unsigned][size] ), str, v ) ); |
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| 126 | CLEANUP: |
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| 127 | delete &str; // created by lex |
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| 128 | return ret; |
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| 129 | } // build_constantInteger |
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| 130 | |
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| 131 | Expression * build_constantFloat( const std::string & str ) { |
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| 132 | static const BasicType::Kind kind[2][3] = { |
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| 133 | { BasicType::Float, BasicType::Double, BasicType::LongDouble }, |
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| 134 | { BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex }, |
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| 135 | }; |
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| 136 | |
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| 137 | bool complx = false; // real, complex |
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| 138 | int size = 1; // 0 => float, 1 => double (default), 2 => long double |
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| 139 | // floating-point constant has minimum of 2 characters: 1. or .1 |
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| 140 | size_t last = str.length() - 1; |
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| 141 | double v; |
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| 142 | |
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| 143 | sscanf( str.c_str(), "%lg", &v ); |
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| 144 | |
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| 145 | if ( checkI( str[last] ) ) { // imaginary ? |
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| 146 | complx = true; |
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| 147 | last -= 1; // backup one character |
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| 148 | } // if |
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| 149 | |
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| 150 | if ( checkF( str[last] ) ) { // float ? |
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| 151 | size = 0; |
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| 152 | } else if ( checkD( str[last] ) ) { // double ? |
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| 153 | size = 1; |
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| 154 | } else if ( checkL( str[last] ) ) { // long double ? |
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| 155 | size = 2; |
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| 156 | } // if |
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| 157 | if ( ! complx && checkI( str[last - 1] ) ) { // imaginary ? |
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| 158 | complx = true; |
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| 159 | } // if |
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| 160 | |
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| 161 | Expression * ret = new ConstantExpr( Constant( new BasicType( noQualifiers, kind[complx][size] ), str, v ) ); |
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| 162 | delete &str; // created by lex |
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| 163 | return ret; |
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| 164 | } // build_constantFloat |
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| 165 | |
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| 166 | Expression * build_constantChar( const std::string & str ) { |
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| 167 | Expression * ret = new ConstantExpr( Constant( new BasicType( noQualifiers, BasicType::Char ), str, (unsigned long long int)(unsigned char)str[1] ) ); |
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| 168 | delete &str; // created by lex |
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| 169 | return ret; |
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| 170 | } // build_constantChar |
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| 171 | |
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| 172 | ConstantExpr * build_constantStr( const std::string & str ) { |
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| 173 | // string should probably be a primitive type |
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| 174 | ArrayType * at = new ArrayType( noQualifiers, new BasicType( Type::Qualifiers( Type::Const ), BasicType::Char ), |
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| 175 | new ConstantExpr( Constant::from_ulong( str.size() + 1 - 2 ) ), // +1 for '\0' and -2 for '"' |
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| 176 | false, false ); |
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| 177 | ConstantExpr * ret = new ConstantExpr( Constant( at, str, (unsigned long long int)0 ) ); // constant 0 is ignored for pure string value |
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| 178 | delete &str; // created by lex |
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| 179 | return ret; |
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| 180 | } // build_constantStr |
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| 181 | |
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| 182 | Expression * build_field_name_FLOATINGconstant( const std::string & str ) { |
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| 183 | // str is of the form A.B -> separate at the . and return member expression |
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| 184 | int a, b; |
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| 185 | char dot; |
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| 186 | std::stringstream ss( str ); |
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| 187 | ss >> a >> dot >> b; |
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| 188 | UntypedMemberExpr * ret = new UntypedMemberExpr( new ConstantExpr( Constant::from_int( b ) ), new ConstantExpr( Constant::from_int( a ) ) ); |
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| 189 | delete &str; |
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| 190 | return ret; |
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| 191 | } // build_field_name_FLOATINGconstant |
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| 192 | |
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| 193 | Expression * make_field_name_fraction_constants( Expression * fieldName, Expression * fracts ) { |
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| 194 | if ( fracts ) { |
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| 195 | if ( UntypedMemberExpr * memberExpr = dynamic_cast< UntypedMemberExpr * >( fracts ) ) { |
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| 196 | memberExpr->set_member( make_field_name_fraction_constants( fieldName, memberExpr->get_aggregate() ) ); |
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| 197 | return memberExpr; |
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| 198 | } else { |
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| 199 | return new UntypedMemberExpr( fracts, fieldName ); |
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| 200 | } |
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| 201 | } |
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| 202 | return fieldName; |
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| 203 | } // make_field_name_fraction_constants |
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| 204 | |
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| 205 | Expression * build_field_name_fraction_constants( Expression * fieldName, ExpressionNode * fracts ) { |
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| 206 | return make_field_name_fraction_constants( fieldName, maybeMoveBuild< Expression >( fracts ) ); |
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| 207 | } // build_field_name_fraction_constants |
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| 208 | |
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| 209 | Expression * build_field_name_REALFRACTIONconstant( const std::string & str ) { |
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| 210 | if ( str.find_first_not_of( "0123456789", 1 ) != string::npos ) throw SemanticError( "invalid tuple index " + str ); |
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| 211 | Expression * ret = build_constantInteger( *new std::string( str.substr(1) ) ); |
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| 212 | delete &str; |
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| 213 | return ret; |
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| 214 | } // build_field_name_REALFRACTIONconstant |
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| 215 | |
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| 216 | Expression * build_field_name_REALDECIMALconstant( const std::string & str ) { |
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| 217 | if ( str[str.size()-1] != '.' ) throw SemanticError( "invalid tuple index " + str ); |
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| 218 | Expression * ret = build_constantInteger( *new std::string( str.substr( 0, str.size()-1 ) ) ); |
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| 219 | delete &str; |
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| 220 | return ret; |
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| 221 | } // build_field_name_REALDECIMALconstant |
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| 222 | |
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| 223 | NameExpr * build_varref( const string * name ) { |
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| 224 | NameExpr * expr = new NameExpr( *name, nullptr ); |
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| 225 | delete name; |
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| 226 | return expr; |
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| 227 | } // build_varref |
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| 228 | |
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| 229 | |
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| 230 | static const char * OperName[] = { // must harmonize with OperKinds |
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| 231 | // diadic |
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| 232 | "SizeOf", "AlignOf", "OffsetOf", "?+?", "?-?", "?\\?", "?*?", "?/?", "?%?", "||", "&&", |
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| 233 | "?|?", "?&?", "?^?", "Cast", "?<<?", "?>>?", "?<?", "?>?", "?<=?", "?>=?", "?==?", "?!=?", |
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| 234 | "?=?", "?@=?", "?\\=?", "?*=?", "?/=?", "?%=?", "?+=?", "?-=?", "?<<=?", "?>>=?", "?&=?", "?^=?", "?|=?", |
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| 235 | "?[?]", "...", |
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| 236 | // monadic |
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| 237 | "+?", "-?", "AddressOf", "*?", "!?", "~?", "++?", "?++", "--?", "?--", "&&" |
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| 238 | }; // OperName |
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| 239 | |
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| 240 | Expression * build_cast( DeclarationNode * decl_node, ExpressionNode * expr_node ) { |
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| 241 | Type * targetType = maybeMoveBuildType( decl_node ); |
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| 242 | if ( dynamic_cast< VoidType * >( targetType ) ) { |
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| 243 | delete targetType; |
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| 244 | return new CastExpr( maybeMoveBuild< Expression >(expr_node) ); |
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| 245 | } else { |
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| 246 | return new CastExpr( maybeMoveBuild< Expression >(expr_node), targetType ); |
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| 247 | } // if |
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| 248 | } // build_cast |
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| 249 | |
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| 250 | Expression * build_virtual_cast( DeclarationNode * decl_node, ExpressionNode * expr_node ) { |
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| 251 | Type * targetType = maybeMoveBuildType( decl_node ); |
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| 252 | Expression * castArg = maybeMoveBuild< Expression >( expr_node ); |
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| 253 | return new VirtualCastExpr( castArg, targetType ); |
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| 254 | } // build_virtual_cast |
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| 255 | |
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| 256 | Expression * build_fieldSel( ExpressionNode * expr_node, Expression * member ) { |
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| 257 | UntypedMemberExpr * ret = new UntypedMemberExpr( member, maybeMoveBuild< Expression >(expr_node) ); |
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| 258 | return ret; |
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| 259 | } // build_fieldSel |
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| 260 | |
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| 261 | Expression * build_pfieldSel( ExpressionNode * expr_node, Expression * member ) { |
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| 262 | UntypedExpr * deref = new UntypedExpr( new NameExpr( "*?" ) ); |
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| 263 | deref->location = expr_node->location; |
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| 264 | deref->get_args().push_back( maybeMoveBuild< Expression >(expr_node) ); |
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| 265 | UntypedMemberExpr * ret = new UntypedMemberExpr( member, deref ); |
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| 266 | return ret; |
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| 267 | } // build_pfieldSel |
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| 268 | |
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| 269 | Expression * build_addressOf( ExpressionNode * expr_node ) { |
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| 270 | return new AddressExpr( maybeMoveBuild< Expression >(expr_node) ); |
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| 271 | } // build_addressOf |
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| 272 | |
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| 273 | Expression * build_sizeOfexpr( ExpressionNode * expr_node ) { |
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| 274 | return new SizeofExpr( maybeMoveBuild< Expression >(expr_node) ); |
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| 275 | } // build_sizeOfexpr |
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| 276 | |
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| 277 | Expression * build_sizeOftype( DeclarationNode * decl_node ) { |
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| 278 | return new SizeofExpr( maybeMoveBuildType( decl_node ) ); |
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| 279 | } // build_sizeOftype |
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| 280 | |
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| 281 | Expression * build_alignOfexpr( ExpressionNode * expr_node ) { |
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| 282 | return new AlignofExpr( maybeMoveBuild< Expression >(expr_node) ); |
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| 283 | } // build_alignOfexpr |
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| 284 | |
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| 285 | Expression * build_alignOftype( DeclarationNode * decl_node ) { |
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| 286 | return new AlignofExpr( maybeMoveBuildType( decl_node) ); |
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| 287 | } // build_alignOftype |
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| 288 | |
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| 289 | Expression * build_offsetOf( DeclarationNode * decl_node, NameExpr * member ) { |
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| 290 | Expression * ret = new UntypedOffsetofExpr( maybeMoveBuildType( decl_node ), member->get_name() ); |
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| 291 | delete member; |
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| 292 | return ret; |
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| 293 | } // build_offsetOf |
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| 294 | |
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| 295 | Expression * build_and_or( ExpressionNode * expr_node1, ExpressionNode * expr_node2, bool kind ) { |
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| 296 | return new LogicalExpr( notZeroExpr( maybeMoveBuild< Expression >(expr_node1) ), notZeroExpr( maybeMoveBuild< Expression >(expr_node2) ), kind ); |
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| 297 | } // build_and_or |
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| 298 | |
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| 299 | Expression * build_unary_val( OperKinds op, ExpressionNode * expr_node ) { |
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| 300 | std::list< Expression * > args; |
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| 301 | args.push_back( maybeMoveBuild< Expression >(expr_node) ); |
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| 302 | return new UntypedExpr( new NameExpr( OperName[ (int)op ] ), args ); |
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| 303 | } // build_unary_val |
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| 304 | |
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| 305 | Expression * build_unary_ptr( OperKinds op, ExpressionNode * expr_node ) { |
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| 306 | std::list< Expression * > args; |
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| 307 | args.push_back( new AddressExpr( maybeMoveBuild< Expression >(expr_node) ) ); |
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| 308 | return new UntypedExpr( new NameExpr( OperName[ (int)op ] ), args ); |
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| 309 | } // build_unary_ptr |
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| 310 | |
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| 311 | Expression * build_binary_val( OperKinds op, ExpressionNode * expr_node1, ExpressionNode * expr_node2 ) { |
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| 312 | std::list< Expression * > args; |
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| 313 | args.push_back( maybeMoveBuild< Expression >(expr_node1) ); |
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| 314 | args.push_back( maybeMoveBuild< Expression >(expr_node2) ); |
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| 315 | return new UntypedExpr( new NameExpr( OperName[ (int)op ] ), args ); |
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| 316 | } // build_binary_val |
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| 317 | |
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| 318 | Expression * build_binary_ptr( OperKinds op, ExpressionNode * expr_node1, ExpressionNode * expr_node2 ) { |
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| 319 | std::list< Expression * > args; |
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| 320 | args.push_back( new AddressExpr( maybeMoveBuild< Expression >(expr_node1) ) ); |
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| 321 | args.push_back( maybeMoveBuild< Expression >(expr_node2) ); |
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| 322 | return new UntypedExpr( new NameExpr( OperName[ (int)op ] ), args ); |
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| 323 | } // build_binary_ptr |
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| 324 | |
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| 325 | Expression * build_cond( ExpressionNode * expr_node1, ExpressionNode * expr_node2, ExpressionNode * expr_node3 ) { |
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| 326 | return new ConditionalExpr( notZeroExpr( maybeMoveBuild< Expression >(expr_node1) ), maybeMoveBuild< Expression >(expr_node2), maybeMoveBuild< Expression >(expr_node3) ); |
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| 327 | } // build_cond |
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| 328 | |
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| 329 | Expression * build_comma( ExpressionNode * expr_node1, ExpressionNode * expr_node2 ) { |
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| 330 | return new CommaExpr( maybeMoveBuild< Expression >(expr_node1), maybeMoveBuild< Expression >(expr_node2) ); |
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| 331 | } // build_comma |
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| 332 | |
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| 333 | Expression * build_attrexpr( NameExpr * var, ExpressionNode * expr_node ) { |
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| 334 | return new AttrExpr( var, maybeMoveBuild< Expression >(expr_node) ); |
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| 335 | } // build_attrexpr |
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| 336 | |
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| 337 | Expression * build_attrtype( NameExpr * var, DeclarationNode * decl_node ) { |
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| 338 | return new AttrExpr( var, maybeMoveBuildType( decl_node ) ); |
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| 339 | } // build_attrtype |
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| 340 | |
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| 341 | Expression * build_tuple( ExpressionNode * expr_node ) { |
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| 342 | std::list< Expression * > exprs; |
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| 343 | buildMoveList( expr_node, exprs ); |
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| 344 | return new UntypedTupleExpr( exprs );; |
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| 345 | } // build_tuple |
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| 346 | |
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| 347 | Expression * build_func( ExpressionNode * function, ExpressionNode * expr_node ) { |
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| 348 | std::list< Expression * > args; |
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| 349 | buildMoveList( expr_node, args ); |
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| 350 | return new UntypedExpr( maybeMoveBuild< Expression >(function), args, nullptr ); |
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| 351 | } // build_func |
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| 352 | |
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| 353 | Expression * build_range( ExpressionNode * low, ExpressionNode * high ) { |
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| 354 | return new RangeExpr( maybeMoveBuild< Expression >( low ), maybeMoveBuild< Expression >( high ) ); |
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| 355 | } // build_range |
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| 356 | |
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| 357 | Expression * build_asmexpr( ExpressionNode * inout, ConstantExpr * constraint, ExpressionNode * operand ) { |
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| 358 | return new AsmExpr( maybeMoveBuild< Expression >( inout ), constraint, maybeMoveBuild< Expression >(operand) ); |
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| 359 | } // build_asmexpr |
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| 360 | |
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| 361 | Expression * build_valexpr( StatementNode * s ) { |
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| 362 | return new StmtExpr( dynamic_cast< CompoundStmt * >(maybeMoveBuild< Statement >(s) ) ); |
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| 363 | } // build_valexpr |
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| 364 | |
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| 365 | Expression * build_typevalue( DeclarationNode * decl ) { |
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| 366 | return new TypeExpr( maybeMoveBuildType( decl ) ); |
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| 367 | } // build_typevalue |
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| 368 | |
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| 369 | Expression * build_compoundLiteral( DeclarationNode * decl_node, InitializerNode * kids ) { |
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| 370 | Declaration * newDecl = maybeBuild< Declaration >(decl_node); // compound literal type |
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| 371 | if ( DeclarationWithType * newDeclWithType = dynamic_cast< DeclarationWithType * >( newDecl ) ) { // non-sue compound-literal type |
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| 372 | return new CompoundLiteralExpr( newDeclWithType->get_type(), maybeMoveBuild< Initializer >(kids) ); |
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| 373 | // these types do not have associated type information |
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| 374 | } else if ( StructDecl * newDeclStructDecl = dynamic_cast< StructDecl * >( newDecl ) ) { |
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| 375 | if ( newDeclStructDecl->has_body() ) { |
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| 376 | return new CompoundLiteralExpr( new StructInstType( Type::Qualifiers(), newDeclStructDecl ), maybeMoveBuild< Initializer >(kids) ); |
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| 377 | } else { |
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| 378 | return new CompoundLiteralExpr( new StructInstType( Type::Qualifiers(), newDeclStructDecl->get_name() ), maybeMoveBuild< Initializer >(kids) ); |
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| 379 | } // if |
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| 380 | } else if ( UnionDecl * newDeclUnionDecl = dynamic_cast< UnionDecl * >( newDecl ) ) { |
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| 381 | if ( newDeclUnionDecl->has_body() ) { |
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| 382 | return new CompoundLiteralExpr( new UnionInstType( Type::Qualifiers(), newDeclUnionDecl ), maybeMoveBuild< Initializer >(kids) ); |
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| 383 | } else { |
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| 384 | return new CompoundLiteralExpr( new UnionInstType( Type::Qualifiers(), newDeclUnionDecl->get_name() ), maybeMoveBuild< Initializer >(kids) ); |
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| 385 | } // if |
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| 386 | } else if ( EnumDecl * newDeclEnumDecl = dynamic_cast< EnumDecl * >( newDecl ) ) { |
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| 387 | if ( newDeclEnumDecl->has_body() ) { |
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| 388 | return new CompoundLiteralExpr( new EnumInstType( Type::Qualifiers(), newDeclEnumDecl ), maybeMoveBuild< Initializer >(kids) ); |
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| 389 | } else { |
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| 390 | return new CompoundLiteralExpr( new EnumInstType( Type::Qualifiers(), newDeclEnumDecl->get_name() ), maybeMoveBuild< Initializer >(kids) ); |
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| 391 | } // if |
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| 392 | } else { |
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| 393 | assert( false ); |
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| 394 | } // if |
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| 395 | } // build_compoundLiteral |
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| 396 | |
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| 397 | // Local Variables: // |
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| 398 | // tab-width: 4 // |
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| 399 | // mode: c++ // |
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| 400 | // compile-command: "make install" // |
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| 401 | // End: // |
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