source: src/ResolvExpr/ConversionCost.cc@ f1149ac

Last change on this file since f1149ac was 0522ebe, checked in by JiadaL <j82liang@…>, 19 months ago

Add EnumPosType to type system
  • Property mode set to 100644
File size: 28.2 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// ConversionCost.cc --
8//
9// Author : Richard C. Bilson
10// Created On : Sun May 17 07:06:19 2015
11// Last Modified By : Andrew Beach
12// Last Modified On : Wed Jul 29 16:11:00 2020
13// Update Count : 28
14//
15
16#include "ConversionCost.h"
17
18#include <cassert> // for assert
19#include <list> // for list, list<>::const_iterator
20#include <string> // for operator==, string
21
22#include "ResolvExpr/Cost.h" // for Cost
23#include "ResolvExpr/Unify.h" // for typesCompatibleIgnoreQualifiers
24#include "ResolvExpr/PtrsAssignable.hpp" // for ptrsAssignable
25
26namespace ResolvExpr {
27
28#if 0
29#define PRINT(x) x
30#else
31#define PRINT(x)
32#endif
33
34 // GENERATED START, DO NOT EDIT
35 // GENERATED BY BasicTypes-gen.cc
36 /* EXTENDED INTEGRAL RANK HIERARCHY (root to leaves)
37 _Bool
38 char signed char unsigned char
39 signed short int unsigned short int
40 signed int unsigned int
41 signed long int unsigned long int
42 signed long long int unsigned long long int
43 __int128 unsigned __int128
44 _Float16 _Float16 _Complex
45 _Float32 _Float32 _Complex
46 float float _Complex
47 _Float32x _Float32x _Complex
48 _Float64 _Float64 _Complex
49 double double _Complex
50 _Float64x _Float64x _Complex
51 __float80
52 _Float128 _Float128 _Complex
53 __float128
54 long double long double _Complex
55 _Float128x _Float128x _Complex
56 */
57 // GENERATED END
58
59 // GENERATED START, DO NOT EDIT
60 // GENERATED BY BasicTypes-gen.cc
61 static const int costMatrix[ast::BasicType::NUMBER_OF_BASIC_TYPES][ast::BasicType::NUMBER_OF_BASIC_TYPES] = { // path length from root to node
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 */
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
99 }; // costMatrix
100 static const int maxIntCost = 15;
101 // GENERATED END
102 static_assert(
103 sizeof(costMatrix)/sizeof(costMatrix[0][0]) == ast::BasicType::NUMBER_OF_BASIC_TYPES * ast::BasicType::NUMBER_OF_BASIC_TYPES,
104 "Missing row in the cost matrix"
105 );
106
107 // GENERATED START, DO NOT EDIT
108 // GENERATED BY BasicTypes-gen.cc
109 static const int signMatrix[ast::BasicType::NUMBER_OF_BASIC_TYPES][ast::BasicType::NUMBER_OF_BASIC_TYPES] = { // number of sign changes in safe conversion
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 */
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
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, },
147 }; // signMatrix
148 // GENERATED END
149 static_assert(
150 sizeof(signMatrix)/sizeof(signMatrix[0][0]) == ast::BasicType::NUMBER_OF_BASIC_TYPES * ast::BasicType::NUMBER_OF_BASIC_TYPES,
151 "Missing row in the sign matrix"
152 );
153
154namespace {
155 int localPtrsAssignable(const ast::Type * t1, const ast::Type * t2,
156 const ast::SymbolTable &, const ast::TypeEnvironment & env ) {
157 return ptrsAssignable( t1, t2, env );
158 }
159}
160
161Cost conversionCost(
162 const ast::Type * src, const ast::Type * dst, bool srcIsLvalue,
163 const ast::SymbolTable & symtab, const ast::TypeEnvironment & env
164) {
165 if ( const ast::TypeInstType * inst = dynamic_cast< const ast::TypeInstType * >( dst ) ) {
166 if ( const ast::EqvClass * eqv = env.lookup( *inst ) ) {
167 if ( eqv->bound ) {
168 return conversionCost(src, eqv->bound, srcIsLvalue, symtab, env );
169 } else {
170 return Cost::infinity;
171 }
172 } else if ( const ast::NamedTypeDecl * named = symtab.lookupType( inst->name ) ) {
173 const ast::TypeDecl * type = dynamic_cast< const ast::TypeDecl * >( named );
174 assertf( type, "Unexpected typedef." );
175 if ( type->base ) {
176 return conversionCost( src, type->base, srcIsLvalue, symtab, env ) + Cost::safe;
177 }
178 }
179 }
180 if ( typesCompatibleIgnoreQualifiers( src, dst, env ) ) {
181 return Cost::zero;
182 } else if ( dynamic_cast< const ast::VoidType * >( dst ) ) {
183 return Cost::safe;
184 } else if ( const ast::ReferenceType * refType =
185 dynamic_cast< const ast::ReferenceType * >( dst ) ) {
186 return convertToReferenceCost( src, refType, srcIsLvalue, symtab, env, localPtrsAssignable );
187 } else {
188 return ast::Pass<ConversionCost>::read( src, dst, srcIsLvalue, symtab, env, conversionCost );
189 }
190}
191
192static Cost convertToReferenceCost( const ast::Type * src, const ast::Type * dst, bool srcIsLvalue,
193 int diff, const ast::SymbolTable & symtab, const ast::TypeEnvironment & env,
194 PtrsCalculation func ) {
195 if ( 0 < diff ) {
196 Cost cost = convertToReferenceCost(
197 strict_dynamic_cast< const ast::ReferenceType * >( src )->base, dst,
198 srcIsLvalue, (diff - 1), symtab, env, func );
199 cost.incReference();
200 return cost;
201 } else if ( diff < -1 ) {
202 Cost cost = convertToReferenceCost(
203 src, strict_dynamic_cast< const ast::ReferenceType * >( dst )->base,
204 srcIsLvalue, (diff + 1), symtab, env, func );
205 cost.incReference();
206 return cost;
207 } else if ( 0 == diff ) {
208 const ast::ReferenceType * srcAsRef = dynamic_cast< const ast::ReferenceType * >( src );
209 const ast::ReferenceType * dstAsRef = dynamic_cast< const ast::ReferenceType * >( dst );
210 if ( srcAsRef && dstAsRef ) {
211 ast::CV::Qualifiers tq1 = srcAsRef->base->qualifiers;
212 ast::CV::Qualifiers tq2 = dstAsRef->base->qualifiers;
213 if ( tq1 <= tq2 && typesCompatibleIgnoreQualifiers(
214 srcAsRef->base, dstAsRef->base, env ) ) {
215 if ( tq1 == tq2 ) {
216 return Cost::zero;
217 } else {
218 return Cost::safe;
219 }
220 } else {
221 int assignResult = func( srcAsRef->base, dstAsRef->base, symtab, env );
222 if ( 0 < assignResult ) {
223 return Cost::safe;
224 } else if ( assignResult < 0 ) {
225 return Cost::unsafe;
226 }
227 }
228 } else {
229 return ast::Pass<ConversionCost>::read( src, dst, srcIsLvalue, symtab, env, conversionCost );
230 }
231 } else {
232 assert( -1 == diff );
233 const ast::ReferenceType * dstAsRef = dynamic_cast< const ast::ReferenceType * >( dst );
234 assert( dstAsRef );
235 if ( typesCompatibleIgnoreQualifiers( src, dstAsRef->base, env ) ) {
236 if ( srcIsLvalue ) {
237 if ( src->qualifiers == dstAsRef->base->qualifiers ) {
238 return Cost::reference;
239 } else if ( src->qualifiers < dstAsRef->base->qualifiers ) {
240 return Cost::safe;
241 } else {
242 return Cost::unsafe;
243 }
244 } else if ( dstAsRef->base->is_const() ) {
245 return Cost::safe;
246 } else {
247 return Cost::unsafe;
248 }
249 }
250 }
251 return Cost::infinity;
252}
253
254Cost convertToReferenceCost( const ast::Type * src, const ast::ReferenceType * dst,
255 bool srcIsLvalue, const ast::SymbolTable & symtab, const ast::TypeEnvironment & env,
256 PtrsCalculation func ) {
257 int sdepth = src->referenceDepth(), ddepth = dst->referenceDepth();
258 return convertToReferenceCost( src, dst, srcIsLvalue, sdepth - ddepth, symtab, env, func );
259}
260
261void ConversionCost::postvisit( const ast::VoidType * voidType ) {
262 (void)voidType;
263 cost = Cost::infinity;
264}
265
266void ConversionCost::conversionCostFromBasicToBasic( const ast::BasicType * src, const ast::BasicType* dest ) {
267 int tableResult = costMatrix[ src->kind ][ dest->kind ];
268 if ( tableResult == -1 ) {
269 cost = Cost::unsafe;
270 } else {
271 cost = Cost::zero;
272 cost.incSafe( tableResult );
273 cost.incSign( signMatrix[ src->kind ][ dest->kind ] );
274 }
275}
276
277void ConversionCost::postvisit( const ast::BasicType * basicType ) {
278 if ( const ast::BasicType * dstAsBasic = dynamic_cast< const ast::BasicType * >( dst ) ) {
279 conversionCostFromBasicToBasic( basicType, dstAsBasic );
280 }
281 else if ( const ast::EnumInstType * enumInst = dynamic_cast< const ast::EnumInstType * >( dst ) ) {
282 auto enumDecl = enumInst->base;
283 if ( enumDecl->base.get() ) {
284 // cost = costCalc( basicType, baseType, srcIsLvalue, symtab, env );
285 // cost.incUnsafe();
286 cost = Cost::infinity;
287 } else {
288 cost = Cost::unsafe;
289 }
290 }
291}
292
293void ConversionCost::postvisit( const ast::PointerType * pointerType ) {
294 if ( const ast::PointerType * dstAsPtr = dynamic_cast< const ast::PointerType * >( dst ) ) {
295 ast::CV::Qualifiers tq1 = pointerType->base->qualifiers;
296 ast::CV::Qualifiers tq2 = dstAsPtr->base->qualifiers;
297 if ( tq1 <= tq2 && typesCompatibleIgnoreQualifiers(
298 pointerType->base, dstAsPtr->base, env ) ) {
299 if ( tq1 == tq2 ) {
300 cost = Cost::zero;
301 } else {
302 cost = Cost::safe;
303 }
304 }
305 /*
306 else if ( const ast::FunctionType * dstFunc = dstAsPtr->base.as<ast::FunctionType>()) {
307 if (const ast::FunctionType * srcFunc = pointerType->base.as<ast::FunctionType>()) {
308 if (dstFunc->params.empty() && dstFunc->isVarArgs ) {
309 cost = Cost::unsafe; // assign any function to variadic fptr
310 }
311 }
312 else {
313 ast::AssertionSet need, have; // unused
314 ast::OpenVarSet open;
315 env.extractOpenVars(open);
316 ast::TypeEnvironment tenv = env;
317 if ( unify(dstAsPtr->base, pointerType->base, tenv, need, have, open, symtab) ) {
318 cost = Cost::safe;
319 }
320 }
321 // else infinity
322 }
323 */
324 else {
325 int assignResult = ptrsAssignable( pointerType->base, dstAsPtr->base, env );
326 if ( 0 < assignResult && tq1 <= tq2 ) {
327 if ( tq1 == tq2 ) {
328 cost = Cost::safe;
329 } else {
330 cost = Cost::safe + Cost::safe;
331 }
332 } else if ( assignResult < 0 ) {
333 cost = Cost::unsafe;
334 } // else Cost::infinity
335 }
336 }
337}
338
339void ConversionCost::postvisit( const ast::ArrayType * arrayType ) {
340 (void)arrayType;
341}
342
343void ConversionCost::postvisit( const ast::ReferenceType * refType ) {
344 assert( nullptr == dynamic_cast< const ast::ReferenceType * >( dst ) );
345
346 cost = costCalc( refType->base, dst, srcIsLvalue, symtab, env );
347
348 // xxx - should qualifiers be considered in pass-by-value?
349 /*
350 if ( refType->base->qualifiers == dst->qualifiers ) {
351 cost.incReference();
352 } else if ( refType->base->qualifiers < dst->qualifiers ) {
353 cost.incSafe();
354 } else {
355 cost.incUnsafe();
356 }
357 */
358 cost.incReference();
359}
360
361void ConversionCost::postvisit( const ast::FunctionType * functionType ) {
362 (void)functionType;
363}
364
365void ConversionCost::postvisit( const ast::EnumInstType * ) {
366 static ast::ptr<ast::BasicType> integer = { new ast::BasicType( ast::BasicType::SignedInt ) };
367 cost = costCalc( integer, dst, srcIsLvalue, symtab, env );
368 // }
369 if ( cost < Cost::unsafe ) {
370 cost.incSafe();
371 }
372}
373
374void ConversionCost::postvisit( const ast::EnumPosType * ) {
375 static ast::ptr<ast::BasicType> integer = { new ast::BasicType( ast::BasicType::SignedInt ) };
376 cost = costCalc( integer, dst, srcIsLvalue, symtab, env );
377 if ( cost < Cost::unsafe ) {
378 cost.incSafe();
379 }
380}
381
382void ConversionCost::postvisit( const ast::TraitInstType * traitInstType ) {
383 (void)traitInstType;
384}
385
386void ConversionCost::postvisit( const ast::TypeInstType * typeInstType ) {
387 if ( const ast::EqvClass * eqv = env.lookup( *typeInstType ) ) {
388 cost = costCalc( eqv->bound, dst, srcIsLvalue, symtab, env );
389 } else if ( const ast::TypeInstType * dstAsInst =
390 dynamic_cast< const ast::TypeInstType * >( dst ) ) {
391 if ( *typeInstType == *dstAsInst ) {
392 cost = Cost::zero;
393 }
394 } else if ( const ast::NamedTypeDecl * namedType = symtab.lookupType( typeInstType->name ) ) {
395 const ast::TypeDecl * type = dynamic_cast< const ast::TypeDecl * >( namedType );
396 assertf( type, "Unexpected typedef.");
397 if ( type->base ) {
398 cost = costCalc( type->base, dst, srcIsLvalue, symtab, env ) + Cost::safe;
399 }
400 }
401}
402
403void ConversionCost::postvisit( const ast::TupleType * tupleType ) {
404 Cost c = Cost::zero;
405 if ( const ast::TupleType * dstAsTuple = dynamic_cast< const ast::TupleType * >( dst ) ) {
406 auto srcIt = tupleType->types.begin();
407 auto dstIt = dstAsTuple->types.begin();
408 auto srcEnd = tupleType->types.end();
409 auto dstEnd = dstAsTuple->types.end();
410 while ( srcIt != srcEnd && dstIt != dstEnd ) {
411 Cost newCost = costCalc( * srcIt++, * dstIt++, srcIsLvalue, symtab, env );
412 if ( newCost == Cost::infinity ) {
413 return;
414 }
415 c += newCost;
416 }
417 if ( dstIt != dstEnd ) {
418 cost = Cost::infinity;
419 } else {
420 cost = c;
421 }
422 }
423}
424
425void ConversionCost::postvisit( const ast::VarArgsType * varArgsType ) {
426 (void)varArgsType;
427 if ( dynamic_cast< const ast::VarArgsType * >( dst ) ) {
428 cost = Cost::zero;
429 }
430}
431
432void ConversionCost::postvisit( const ast::ZeroType * zeroType ) {
433 (void)zeroType;
434 if ( dynamic_cast< const ast::ZeroType * >( dst ) ) {
435 cost = Cost::zero;
436 } else if ( const ast::BasicType * dstAsBasic =
437 dynamic_cast< const ast::BasicType * >( dst ) ) {
438 int tableResult = costMatrix[ ast::BasicType::SignedInt ][ dstAsBasic->kind ];
439 if ( -1 == tableResult ) {
440 cost = Cost::unsafe;
441 } else {
442 cost = Cost::zero;
443 cost.incSafe( tableResult + 1 );
444 cost.incSign( signMatrix[ ast::BasicType::SignedInt ][ dstAsBasic->kind ] );
445 }
446 // this has the effect of letting any expr such as x+0, x+1 to be typed
447 // the same as x, instead of at least int. are we willing to sacrifice this little
448 // bit of coherence with C?
449 // TODO: currently this does not work when no zero/one overloads exist. Find a fix for it.
450 // cost = Cost::zero;
451 } else if ( dynamic_cast< const ast::PointerType * >( dst ) ) {
452 cost = Cost::zero;
453 // +1 for zero_t ->, +1 for disambiguation
454 cost.incSafe( maxIntCost + 2 );
455 // assuming 0p is supposed to be used for pointers?
456 }
457}
458
459void ConversionCost::postvisit( const ast::OneType * oneType ) {
460 (void)oneType;
461 if ( dynamic_cast< const ast::OneType * >( dst ) ) {
462 cost = Cost::zero;
463 } else if ( const ast::BasicType * dstAsBasic =
464 dynamic_cast< const ast::BasicType * >( dst ) ) {
465 int tableResult = costMatrix[ ast::BasicType::SignedInt ][ dstAsBasic->kind ];
466 if ( -1 == tableResult ) {
467 cost = Cost::unsafe;
468 } else {
469 cost = Cost::zero;
470 cost.incSafe( tableResult + 1 );
471 cost.incSign( signMatrix[ ast::BasicType::SignedInt ][ dstAsBasic->kind ] );
472 }
473 }
474}
475
476// size_t ConversionCost::traceId = Stats::Heap::new_stacktrace_id("ConversionCost");
477
478} // namespace ResolvExpr
479
480// Local Variables: //
481// tab-width: 4 //
482// mode: c++ //
483// compile-command: "make install" //
484// End: //
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