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 | // ConversionCost.cc -- |
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8 | // |
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9 | // Author : Richard C. Bilson |
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10 | // Created On : Sun May 17 07:06:19 2015 |
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11 | // Last Modified By : Andrew Beach |
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12 | // Last Modified On : Wed Jul 29 16:11:00 2020 |
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13 | // Update Count : 28 |
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14 | // |
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15 | |
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16 | #include "ConversionCost.h" |
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17 | |
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18 | #include <cassert> // for assert |
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19 | #include <list> // for list, list<>::const_iterator |
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20 | #include <string> // for operator==, string |
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21 | |
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22 | #include "ResolvExpr/Cost.h" // for Cost |
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23 | #include "ResolvExpr/Unify.h" // for typesCompatibleIgnoreQualifiers |
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24 | #include "ResolvExpr/PtrsAssignable.hpp" // for ptrsAssignable |
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25 | |
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26 | namespace ResolvExpr { |
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27 | |
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28 | #if 0 |
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29 | #define PRINT(x) x |
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30 | #else |
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31 | #define PRINT(x) |
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32 | #endif |
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33 | |
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34 | // GENERATED START, DO NOT EDIT |
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35 | // GENERATED BY BasicTypes-gen.cc |
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36 | /* EXTENDED INTEGRAL RANK HIERARCHY (root to leaves) |
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37 | _Bool |
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38 | char signed char unsigned char |
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39 | signed short int unsigned short int |
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40 | signed int unsigned int |
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41 | signed long int unsigned long int |
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42 | signed long long int unsigned long long int |
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43 | __int128 unsigned __int128 |
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44 | _Float16 _Float16 _Complex |
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45 | _Float32 _Float32 _Complex |
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46 | float float _Complex |
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47 | _Float32x _Float32x _Complex |
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48 | _Float64 _Float64 _Complex |
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49 | double double _Complex |
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50 | _Float64x _Float64x _Complex |
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51 | __float80 |
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52 | _Float128 _Float128 _Complex |
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53 | __float128 |
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54 | long double long double _Complex |
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55 | _Float128x _Float128x _Complex |
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56 | */ |
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57 | // GENERATED END |
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58 | |
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59 | // GENERATED START, DO NOT EDIT |
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60 | // GENERATED BY BasicTypes-gen.cc |
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61 | static const int costMatrix[ast::BasicType::NUMBER_OF_BASIC_TYPES][ast::BasicType::NUMBER_OF_BASIC_TYPES] = { // path length from root to node |
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62 | /* B C SC UC SI SUI I UI LI LUI LLI LLUI IB UIB _FH _FH _F _FC F FC _FX _FXC FD _FDC D DC F80X_FDXC F80 _FB_FLDC FB LD LDC _FBX_FLDXC */ |
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63 | /* B */ { 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 17, 16, 18, 17, }, |
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64 | /* C */ { -1, 0, 1, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 16, 15, 17, 16, }, |
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65 | /* SC */ { -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 16, 15, 17, 16, }, |
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66 | /* UC */ { -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 16, 15, 17, 16, }, |
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67 | /* SI */ { -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 15, 14, 16, 15, }, |
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68 | /* SUI */ { -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 15, 14, 16, 15, }, |
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69 | /* I */ { -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 14, 13, 15, 14, }, |
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70 | /* UI */ { -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 14, 13, 15, 14, }, |
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71 | /* LI */ { -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 13, 12, 14, 13, }, |
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72 | /* LUI */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 13, 12, 14, 13, }, |
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73 | /* LLI */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 12, 11, 13, 12, }, |
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74 | /* LLUI */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 12, 11, 13, 12, }, |
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75 | /* IB */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 11, 10, 12, 11, }, |
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76 | /* UIB */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 11, 10, 12, 11, }, |
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77 | /* _FH */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 10, 9, 11, 10, }, |
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78 | /* _FH */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, 1, -1, 2, -1, 3, -1, 4, -1, 5, -1, 6, -1, -1, 7, -1, -1, 8, -1, 9, }, |
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79 | /* _F */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 9, 8, 10, 9, }, |
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80 | /* _FC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, 1, -1, 2, -1, 3, -1, 4, -1, 5, -1, -1, 6, -1, -1, 7, -1, 8, }, |
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81 | /* F */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 8, 7, 9, 8, }, |
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82 | /* FC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, 1, -1, 2, -1, 3, -1, 4, -1, -1, 5, -1, -1, 6, -1, 7, }, |
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83 | /* _FX */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 7, 6, 8, 7, }, |
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84 | /* _FXC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, 1, -1, 2, -1, 3, -1, -1, 4, -1, -1, 5, -1, 6, }, |
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85 | /* FD */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 6, 5, 7, 6, }, |
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86 | /* _FDC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, 1, -1, 2, -1, -1, 3, -1, -1, 4, -1, 5, }, |
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87 | /* D */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, 4, 5, 4, 6, 5, }, |
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88 | /* DC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, 1, -1, -1, 2, -1, -1, 3, -1, 4, }, |
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89 | /* F80X */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 4, 3, 5, 4, }, |
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90 | /* _FDXC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, -1, 1, -1, -1, 2, -1, 3, }, |
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91 | /* F80 */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 0, 1, 2, 2, 3, 3, 4, 4, }, |
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92 | /* _FB */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, 2, 3, 3, }, |
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93 | /* _FLDC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, -1, 1, -1, 2, }, |
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94 | /* FB */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 0, 1, 2, 2, 3, }, |
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95 | /* LD */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, 2, }, |
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96 | /* LDC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, 1, }, |
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97 | /* _FBX */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, }, |
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98 | /* _FLDXC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, }, |
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99 | }; // costMatrix |
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100 | static const int maxIntCost = 15; |
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101 | // GENERATED END |
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102 | static_assert( |
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103 | sizeof(costMatrix)/sizeof(costMatrix[0][0]) == ast::BasicType::NUMBER_OF_BASIC_TYPES * ast::BasicType::NUMBER_OF_BASIC_TYPES, |
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104 | "Missing row in the cost matrix" |
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105 | ); |
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106 | |
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107 | // GENERATED START, DO NOT EDIT |
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108 | // GENERATED BY BasicTypes-gen.cc |
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109 | static const int signMatrix[ast::BasicType::NUMBER_OF_BASIC_TYPES][ast::BasicType::NUMBER_OF_BASIC_TYPES] = { // number of sign changes in safe conversion |
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110 | /* B C SC UC SI SUI I UI LI LUI LLI LLUI IB UIB _FH _FH _F _FC F FC _FX _FXC FD _FDC D DC F80X_FDXC F80 _FB_FLDC FB LD LDC _FBX_FLDXC */ |
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111 | /* B */ { 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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112 | /* C */ { -1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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113 | /* SC */ { -1, -1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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114 | /* UC */ { -1, -1, -1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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115 | /* SI */ { -1, -1, -1, -1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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116 | /* SUI */ { -1, -1, -1, -1, -1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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117 | /* I */ { -1, -1, -1, -1, -1, -1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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118 | /* UI */ { -1, -1, -1, -1, -1, -1, -1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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119 | /* LI */ { -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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120 | /* LUI */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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121 | /* LLI */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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122 | /* LLUI */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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123 | /* IB */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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124 | /* UIB */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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125 | /* _FH */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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126 | /* _FH */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, -1, 0, -1, -1, 0, -1, 0, }, |
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127 | /* _F */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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128 | /* _FC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, -1, 0, -1, -1, 0, -1, 0, }, |
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129 | /* F */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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130 | /* FC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, -1, 0, -1, -1, 0, -1, 0, }, |
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131 | /* _FX */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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132 | /* _FXC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, 0, -1, 0, -1, 0, -1, -1, 0, -1, -1, 0, -1, 0, }, |
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133 | /* FD */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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134 | /* _FDC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, 0, -1, 0, -1, -1, 0, -1, -1, 0, -1, 0, }, |
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135 | /* D */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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136 | /* DC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, 0, -1, -1, 0, -1, -1, 0, -1, 0, }, |
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137 | /* F80X */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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138 | /* _FDXC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, -1, 0, -1, -1, 0, -1, 0, }, |
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139 | /* F80 */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, |
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140 | /* _FB */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, }, |
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141 | /* _FLDC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, -1, 0, -1, 0, }, |
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142 | /* FB */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, }, |
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143 | /* LD */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, }, |
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144 | /* LDC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, 0, }, |
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145 | /* _FBX */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, }, |
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146 | /* _FLDXC */ { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, }, |
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147 | }; // signMatrix |
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148 | // GENERATED END |
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149 | static_assert( |
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150 | sizeof(signMatrix)/sizeof(signMatrix[0][0]) == ast::BasicType::NUMBER_OF_BASIC_TYPES * ast::BasicType::NUMBER_OF_BASIC_TYPES, |
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151 | "Missing row in the sign matrix" |
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152 | ); |
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153 | |
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154 | namespace { |
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155 | int localPtrsAssignable(const ast::Type * t1, const ast::Type * t2, |
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156 | const ast::SymbolTable &, const ast::TypeEnvironment & env ) { |
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157 | return ptrsAssignable( t1, t2, env ); |
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158 | } |
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159 | } |
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160 | |
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161 | Cost conversionCost( |
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162 | const ast::Type * src, const ast::Type * dst, bool srcIsLvalue, |
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163 | const ast::SymbolTable & symtab, const ast::TypeEnvironment & env |
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164 | ) { |
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165 | if ( const ast::TypeInstType * inst = dynamic_cast< const ast::TypeInstType * >( dst ) ) { |
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166 | if ( const ast::EqvClass * eqv = env.lookup( *inst ) ) { |
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167 | if ( eqv->bound ) { |
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168 | return conversionCost(src, eqv->bound, srcIsLvalue, symtab, env ); |
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169 | } else { |
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170 | return Cost::infinity; |
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171 | } |
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172 | } else if ( const ast::NamedTypeDecl * named = symtab.lookupType( inst->name ) ) { |
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173 | const ast::TypeDecl * type = dynamic_cast< const ast::TypeDecl * >( named ); |
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174 | assertf( type, "Unexpected typedef." ); |
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175 | if ( type->base ) { |
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176 | return conversionCost( src, type->base, srcIsLvalue, symtab, env ) + Cost::safe; |
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177 | } |
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178 | } |
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179 | } |
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180 | if ( typesCompatibleIgnoreQualifiers( src, dst, env ) ) { |
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181 | return Cost::zero; |
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182 | } else if ( dynamic_cast< const ast::VoidType * >( dst ) ) { |
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183 | return Cost::safe; |
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184 | } else if ( const ast::ReferenceType * refType = |
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185 | dynamic_cast< const ast::ReferenceType * >( dst ) ) { |
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186 | return convertToReferenceCost( src, refType, srcIsLvalue, symtab, env, localPtrsAssignable ); |
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187 | } else { |
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188 | return ast::Pass<ConversionCost>::read( src, dst, srcIsLvalue, symtab, env, conversionCost ); |
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189 | } |
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190 | } |
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191 | |
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192 | static Cost convertToReferenceCost( const ast::Type * src, const ast::Type * dst, bool srcIsLvalue, |
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193 | int diff, const ast::SymbolTable & symtab, const ast::TypeEnvironment & env, |
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194 | PtrsCalculation func ) { |
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195 | if ( 0 < diff ) { |
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196 | Cost cost = convertToReferenceCost( |
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197 | strict_dynamic_cast< const ast::ReferenceType * >( src )->base, dst, |
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198 | srcIsLvalue, (diff - 1), symtab, env, func ); |
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199 | cost.incReference(); |
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200 | return cost; |
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201 | } else if ( diff < -1 ) { |
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202 | Cost cost = convertToReferenceCost( |
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203 | src, strict_dynamic_cast< const ast::ReferenceType * >( dst )->base, |
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204 | srcIsLvalue, (diff + 1), symtab, env, func ); |
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205 | cost.incReference(); |
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206 | return cost; |
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207 | } else if ( 0 == diff ) { |
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208 | const ast::ReferenceType * srcAsRef = dynamic_cast< const ast::ReferenceType * >( src ); |
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209 | const ast::ReferenceType * dstAsRef = dynamic_cast< const ast::ReferenceType * >( dst ); |
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210 | if ( srcAsRef && dstAsRef ) { |
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211 | ast::CV::Qualifiers tq1 = srcAsRef->base->qualifiers; |
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212 | ast::CV::Qualifiers tq2 = dstAsRef->base->qualifiers; |
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213 | if ( tq1 <= tq2 && typesCompatibleIgnoreQualifiers( |
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214 | srcAsRef->base, dstAsRef->base, env ) ) { |
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215 | if ( tq1 == tq2 ) { |
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216 | return Cost::zero; |
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217 | } else { |
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218 | return Cost::safe; |
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219 | } |
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220 | } else { |
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221 | int assignResult = func( srcAsRef->base, dstAsRef->base, symtab, env ); |
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222 | if ( 0 < assignResult ) { |
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223 | return Cost::safe; |
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224 | } else if ( assignResult < 0 ) { |
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225 | return Cost::unsafe; |
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226 | } |
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227 | } |
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228 | } else { |
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229 | return ast::Pass<ConversionCost>::read( src, dst, srcIsLvalue, symtab, env, conversionCost ); |
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230 | } |
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231 | } else { |
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232 | assert( -1 == diff ); |
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233 | const ast::ReferenceType * dstAsRef = dynamic_cast< const ast::ReferenceType * >( dst ); |
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234 | assert( dstAsRef ); |
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235 | if ( typesCompatibleIgnoreQualifiers( src, dstAsRef->base, env ) ) { |
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236 | if ( srcIsLvalue ) { |
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237 | if ( src->qualifiers == dstAsRef->base->qualifiers ) { |
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238 | return Cost::reference; |
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239 | } else if ( src->qualifiers < dstAsRef->base->qualifiers ) { |
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240 | return Cost::safe; |
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241 | } else { |
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242 | return Cost::unsafe; |
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243 | } |
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244 | } else if ( dstAsRef->base->is_const() ) { |
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245 | return Cost::safe; |
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246 | } else { |
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247 | return Cost::unsafe; |
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248 | } |
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249 | } |
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250 | } |
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251 | return Cost::infinity; |
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252 | } |
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253 | |
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254 | Cost convertToReferenceCost( const ast::Type * src, const ast::ReferenceType * dst, |
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255 | bool srcIsLvalue, const ast::SymbolTable & symtab, const ast::TypeEnvironment & env, |
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256 | PtrsCalculation func ) { |
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257 | int sdepth = src->referenceDepth(), ddepth = dst->referenceDepth(); |
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258 | return convertToReferenceCost( src, dst, srcIsLvalue, sdepth - ddepth, symtab, env, func ); |
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259 | } |
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260 | |
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261 | void ConversionCost::postvisit( const ast::VoidType * voidType ) { |
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262 | (void)voidType; |
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263 | cost = Cost::infinity; |
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264 | } |
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265 | |
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266 | void ConversionCost::conversionCostFromBasicToBasic( const ast::BasicType * src, const ast::BasicType* dest ) { |
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267 | int tableResult = costMatrix[ src->kind ][ dest->kind ]; |
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268 | if ( tableResult == -1 ) { |
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269 | cost = Cost::unsafe; |
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270 | } else { |
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271 | cost = Cost::zero; |
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272 | cost.incSafe( tableResult ); |
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273 | cost.incSign( signMatrix[ src->kind ][ dest->kind ] ); |
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274 | } |
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275 | } |
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276 | |
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277 | void ConversionCost::postvisit( const ast::BasicType * basicType ) { |
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278 | if ( const ast::BasicType * dstAsBasic = dynamic_cast< const ast::BasicType * >( dst ) ) { |
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279 | conversionCostFromBasicToBasic( basicType, dstAsBasic ); |
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280 | } |
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281 | else if ( const ast::EnumInstType * enumInst = dynamic_cast< const ast::EnumInstType * >( dst ) ) { |
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282 | auto enumDecl = enumInst->base; |
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283 | if ( enumDecl->base.get() ) { |
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284 | // cost = costCalc( basicType, baseType, srcIsLvalue, symtab, env ); |
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285 | // cost.incUnsafe(); |
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286 | cost = Cost::infinity; |
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287 | } else { |
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288 | cost = Cost::unsafe; |
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289 | } |
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290 | } else if ( dynamic_cast< const ast::EnumPosType *>(dst) ) { |
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291 | static ast::ptr<ast::BasicType> integer = { new ast::BasicType( ast::BasicType::SignedInt ) }; |
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292 | cost = costCalc( basicType, integer, srcIsLvalue, symtab, env ); |
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293 | } |
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294 | } |
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295 | |
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296 | void ConversionCost::postvisit( const ast::PointerType * pointerType ) { |
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297 | if ( const ast::PointerType * dstAsPtr = dynamic_cast< const ast::PointerType * >( dst ) ) { |
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298 | ast::CV::Qualifiers tq1 = pointerType->base->qualifiers; |
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299 | ast::CV::Qualifiers tq2 = dstAsPtr->base->qualifiers; |
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300 | if ( tq1 <= tq2 && typesCompatibleIgnoreQualifiers( |
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301 | pointerType->base, dstAsPtr->base, env ) ) { |
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302 | if ( tq1 == tq2 ) { |
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303 | cost = Cost::zero; |
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304 | } else { |
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305 | cost = Cost::safe; |
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306 | } |
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307 | } |
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308 | /* |
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309 | else if ( const ast::FunctionType * dstFunc = dstAsPtr->base.as<ast::FunctionType>()) { |
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310 | if (const ast::FunctionType * srcFunc = pointerType->base.as<ast::FunctionType>()) { |
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311 | if (dstFunc->params.empty() && dstFunc->isVarArgs ) { |
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312 | cost = Cost::unsafe; // assign any function to variadic fptr |
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313 | } |
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314 | } |
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315 | else { |
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316 | ast::AssertionSet need, have; // unused |
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317 | ast::OpenVarSet open; |
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318 | env.extractOpenVars(open); |
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319 | ast::TypeEnvironment tenv = env; |
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320 | if ( unify(dstAsPtr->base, pointerType->base, tenv, need, have, open, symtab) ) { |
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321 | cost = Cost::safe; |
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322 | } |
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323 | } |
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324 | // else infinity |
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325 | } |
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326 | */ |
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327 | else { |
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328 | int assignResult = ptrsAssignable( pointerType->base, dstAsPtr->base, env ); |
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329 | if ( 0 < assignResult && tq1 <= tq2 ) { |
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330 | if ( tq1 == tq2 ) { |
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331 | cost = Cost::safe; |
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332 | } else { |
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333 | cost = Cost::safe + Cost::safe; |
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334 | } |
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335 | } else if ( assignResult < 0 ) { |
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336 | cost = Cost::unsafe; |
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337 | } // else Cost::infinity |
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338 | } |
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339 | } |
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340 | } |
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341 | |
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342 | void ConversionCost::postvisit( const ast::ArrayType * arrayType ) { |
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343 | (void)arrayType; |
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344 | } |
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345 | |
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346 | void ConversionCost::postvisit( const ast::ReferenceType * refType ) { |
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347 | assert( nullptr == dynamic_cast< const ast::ReferenceType * >( dst ) ); |
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348 | |
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349 | cost = costCalc( refType->base, dst, srcIsLvalue, symtab, env ); |
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350 | |
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351 | // xxx - should qualifiers be considered in pass-by-value? |
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352 | /* |
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353 | if ( refType->base->qualifiers == dst->qualifiers ) { |
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354 | cost.incReference(); |
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355 | } else if ( refType->base->qualifiers < dst->qualifiers ) { |
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356 | cost.incSafe(); |
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357 | } else { |
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358 | cost.incUnsafe(); |
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359 | } |
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360 | */ |
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361 | cost.incReference(); |
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362 | } |
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363 | |
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364 | void ConversionCost::postvisit( const ast::FunctionType * functionType ) { |
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365 | (void)functionType; |
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366 | } |
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367 | |
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368 | void ConversionCost::postvisit( const ast::EnumInstType * ) { |
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369 | static ast::ptr<ast::BasicType> integer = { new ast::BasicType( ast::BasicType::SignedInt ) }; |
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370 | cost = costCalc( integer, dst, srcIsLvalue, symtab, env ); |
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371 | if ( cost < Cost::unsafe ) { |
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372 | cost.incSafe(); |
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373 | } |
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374 | } |
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375 | |
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376 | void ConversionCost::postvisit( const ast::EnumPosType * src ) { |
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377 | if ( dynamic_cast<const ast::EnumPosType *>( dst ) ) { |
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378 | // cost = costCalc( src->instance, dstBase->instance, srcIsLvalue, symtab, env ); |
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379 | // if ( cost < Cost::unsafe ) cost.incSafe(); |
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380 | cost = Cost::zero; |
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381 | } else if ( auto dstBase = dynamic_cast<const ast::EnumInstType *>( dst ) ) { |
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382 | cost = costCalc( src->instance, dstBase, srcIsLvalue, symtab, env ); |
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383 | if ( cost < Cost::unsafe ) cost.incSafe(); |
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384 | } else { |
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385 | static ast::ptr<ast::BasicType> integer = { new ast::BasicType( ast::BasicType::SignedInt ) }; |
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386 | cost = costCalc( integer, dst, srcIsLvalue, symtab, env ); |
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387 | if ( cost < Cost::unsafe ) { |
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388 | cost.incSafe(); |
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389 | } |
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390 | } |
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391 | |
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392 | } |
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393 | |
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394 | void ConversionCost::postvisit( const ast::TraitInstType * traitInstType ) { |
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395 | (void)traitInstType; |
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396 | } |
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397 | |
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398 | void ConversionCost::postvisit( const ast::TypeInstType * typeInstType ) { |
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399 | if ( const ast::EqvClass * eqv = env.lookup( *typeInstType ) ) { |
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400 | cost = costCalc( eqv->bound, dst, srcIsLvalue, symtab, env ); |
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401 | } else if ( const ast::TypeInstType * dstAsInst = |
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402 | dynamic_cast< const ast::TypeInstType * >( dst ) ) { |
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403 | if ( *typeInstType == *dstAsInst ) { |
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404 | cost = Cost::zero; |
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405 | } |
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406 | } else if ( const ast::NamedTypeDecl * namedType = symtab.lookupType( typeInstType->name ) ) { |
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407 | const ast::TypeDecl * type = dynamic_cast< const ast::TypeDecl * >( namedType ); |
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408 | assertf( type, "Unexpected typedef."); |
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409 | if ( type->base ) { |
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410 | cost = costCalc( type->base, dst, srcIsLvalue, symtab, env ) + Cost::safe; |
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411 | } |
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412 | } |
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413 | } |
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414 | |
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415 | void ConversionCost::postvisit( const ast::TupleType * tupleType ) { |
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416 | Cost c = Cost::zero; |
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417 | if ( const ast::TupleType * dstAsTuple = dynamic_cast< const ast::TupleType * >( dst ) ) { |
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418 | auto srcIt = tupleType->types.begin(); |
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419 | auto dstIt = dstAsTuple->types.begin(); |
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420 | auto srcEnd = tupleType->types.end(); |
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421 | auto dstEnd = dstAsTuple->types.end(); |
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422 | while ( srcIt != srcEnd && dstIt != dstEnd ) { |
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423 | Cost newCost = costCalc( * srcIt++, * dstIt++, srcIsLvalue, symtab, env ); |
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424 | if ( newCost == Cost::infinity ) { |
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425 | return; |
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426 | } |
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427 | c += newCost; |
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428 | } |
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429 | if ( dstIt != dstEnd ) { |
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430 | cost = Cost::infinity; |
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431 | } else { |
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432 | cost = c; |
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433 | } |
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434 | } |
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435 | } |
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436 | |
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437 | void ConversionCost::postvisit( const ast::VarArgsType * varArgsType ) { |
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438 | (void)varArgsType; |
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439 | if ( dynamic_cast< const ast::VarArgsType * >( dst ) ) { |
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440 | cost = Cost::zero; |
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441 | } |
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442 | } |
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443 | |
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444 | void ConversionCost::postvisit( const ast::ZeroType * zeroType ) { |
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445 | (void)zeroType; |
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446 | if ( dynamic_cast< const ast::ZeroType * >( dst ) ) { |
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447 | cost = Cost::zero; |
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448 | } else if ( const ast::BasicType * dstAsBasic = |
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449 | dynamic_cast< const ast::BasicType * >( dst ) ) { |
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450 | int tableResult = costMatrix[ ast::BasicType::SignedInt ][ dstAsBasic->kind ]; |
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451 | if ( -1 == tableResult ) { |
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452 | cost = Cost::unsafe; |
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453 | } else { |
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454 | cost = Cost::zero; |
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455 | cost.incSafe( tableResult + 1 ); |
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456 | cost.incSign( signMatrix[ ast::BasicType::SignedInt ][ dstAsBasic->kind ] ); |
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457 | } |
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458 | // this has the effect of letting any expr such as x+0, x+1 to be typed |
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459 | // the same as x, instead of at least int. are we willing to sacrifice this little |
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460 | // bit of coherence with C? |
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461 | // TODO: currently this does not work when no zero/one overloads exist. Find a fix for it. |
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462 | // cost = Cost::zero; |
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463 | } else if ( dynamic_cast< const ast::PointerType * >( dst ) ) { |
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464 | cost = Cost::zero; |
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465 | // +1 for zero_t ->, +1 for disambiguation |
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466 | cost.incSafe( maxIntCost + 2 ); |
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467 | // assuming 0p is supposed to be used for pointers? |
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468 | } |
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469 | } |
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470 | |
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471 | void ConversionCost::postvisit( const ast::OneType * oneType ) { |
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472 | (void)oneType; |
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473 | if ( dynamic_cast< const ast::OneType * >( dst ) ) { |
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474 | cost = Cost::zero; |
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475 | } else if ( const ast::BasicType * dstAsBasic = |
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476 | dynamic_cast< const ast::BasicType * >( dst ) ) { |
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477 | int tableResult = costMatrix[ ast::BasicType::SignedInt ][ dstAsBasic->kind ]; |
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478 | if ( -1 == tableResult ) { |
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479 | cost = Cost::unsafe; |
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480 | } else { |
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481 | cost = Cost::zero; |
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482 | cost.incSafe( tableResult + 1 ); |
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483 | cost.incSign( signMatrix[ ast::BasicType::SignedInt ][ dstAsBasic->kind ] ); |
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484 | } |
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485 | } |
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486 | } |
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487 | |
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488 | // size_t ConversionCost::traceId = Stats::Heap::new_stacktrace_id("ConversionCost"); |
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489 | |
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490 | } // namespace ResolvExpr |
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491 | |
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492 | // Local Variables: // |
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493 | // tab-width: 4 // |
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494 | // mode: c++ // |
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495 | // compile-command: "make install" // |
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496 | // End: // |
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