source: src/ResolvExpr/CommonType.cpp@ 1a8b17a

Last change on this file since 1a8b17a was c5f69fd, checked in by Peter A. Buhr <pabuhr@…>, 14 months ago

clean up naming of float-point types, and start to add new ARM floating-point types
  • Property mode set to 100644
File size: 50.1 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// CommonType.cpp --
8//
9// Author : Richard C. Bilson
10// Created On : Sun May 17 06:59:27 2015
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Thu Feb 14 17:10:10 2019
13// Update Count : 24
14//
15
16#include "CommonType.hpp"
17
18#include <cassert> // for strict_dynamic_cast
19#include <map> // for _Rb_tree_const_iterator
20#include <utility> // for pair
21
22#include "AST/Decl.hpp"
23#include "AST/Pass.hpp"
24#include "AST/Type.hpp"
25#include "Unify.hpp" // for unifyExact, WidenMode
26#include "Typeops.hpp" // for isFtype
27#include "Tuples/Tuples.hpp"
28
29// #define DEBUG
30#ifdef DEBUG
31#define PRINT(x) x
32#else
33#define PRINT(x)
34#endif
35
36namespace ResolvExpr {
37
38namespace {
39
40 // GENERATED START, DO NOT EDIT
41 // GENERATED BY BasicTypes-gen.cpp
42 #define BT ast::BasicKind::
43 static const ast::BasicKind commonTypes[BT NUMBER_OF_BASIC_TYPES][BT NUMBER_OF_BASIC_TYPES] = { // nearest common ancestor
44 /* B C SC UC SI SUI
45 I UI LI LUI LLI LLUI
46 IB UIB _FH _FH _F _FC
47 F FC _FX _FXC FD _FDC
48 D DC F80X _FDXC F80 _FB
49 _FLDC FB LD LDC _FBX _FLDXC
50 */
51 {
52 /* B */ BT Bool, BT Char, BT SignedChar, BT UnsignedChar, BT ShortSignedInt, BT ShortUnsignedInt,
53 BT SignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
54 BT SignedInt128, BT UnsignedInt128, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
55 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
56 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
57 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
58 },
59 {
60 /* C */ BT Char, BT Char, BT SignedChar, BT UnsignedChar, BT ShortSignedInt, BT ShortUnsignedInt,
61 BT SignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
62 BT SignedInt128, BT UnsignedInt128, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
63 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
64 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
65 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
66 },
67 {
68 /* SC */ BT SignedChar, BT SignedChar, BT SignedChar, BT UnsignedChar, BT ShortSignedInt, BT ShortUnsignedInt,
69 BT SignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
70 BT SignedInt128, BT UnsignedInt128, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
71 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
72 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
73 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
74 },
75 {
76 /* UC */ BT UnsignedChar, BT UnsignedChar, BT UnsignedChar, BT UnsignedChar, BT ShortSignedInt, BT ShortUnsignedInt,
77 BT SignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
78 BT SignedInt128, BT UnsignedInt128, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
79 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
80 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
81 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
82 },
83 {
84 /* SI */ BT ShortSignedInt, BT ShortSignedInt, BT ShortSignedInt, BT ShortSignedInt, BT ShortSignedInt, BT ShortUnsignedInt,
85 BT SignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
86 BT SignedInt128, BT UnsignedInt128, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
87 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
88 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
89 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
90 },
91 {
92 /* SUI */ BT ShortUnsignedInt, BT ShortUnsignedInt, BT ShortUnsignedInt, BT ShortUnsignedInt, BT ShortUnsignedInt, BT ShortUnsignedInt,
93 BT SignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
94 BT SignedInt128, BT UnsignedInt128, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
95 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
96 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
97 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
98 },
99 {
100 /* I */ BT SignedInt, BT SignedInt, BT SignedInt, BT SignedInt, BT SignedInt, BT SignedInt,
101 BT SignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
102 BT SignedInt128, BT UnsignedInt128, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
103 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
104 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
105 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
106 },
107 {
108 /* UI */ BT UnsignedInt, BT UnsignedInt, BT UnsignedInt, BT UnsignedInt, BT UnsignedInt, BT UnsignedInt,
109 BT UnsignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
110 BT SignedInt128, BT UnsignedInt128, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
111 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
112 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
113 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
114 },
115 {
116 /* LI */ BT LongSignedInt, BT LongSignedInt, BT LongSignedInt, BT LongSignedInt, BT LongSignedInt, BT LongSignedInt,
117 BT LongSignedInt, BT LongSignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
118 BT SignedInt128, BT UnsignedInt128, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
119 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
120 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
121 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
122 },
123 {
124 /* LUI */ BT LongUnsignedInt, BT LongUnsignedInt, BT LongUnsignedInt, BT LongUnsignedInt, BT LongUnsignedInt, BT LongUnsignedInt,
125 BT LongUnsignedInt, BT LongUnsignedInt, BT LongUnsignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
126 BT SignedInt128, BT UnsignedInt128, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
127 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
128 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
129 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
130 },
131 {
132 /* LLI */ BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongSignedInt,
133 BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
134 BT SignedInt128, BT UnsignedInt128, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
135 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
136 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
137 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
138 },
139 {
140 /* LLUI */ BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt,
141 BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt,
142 BT SignedInt128, BT UnsignedInt128, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
143 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
144 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
145 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
146 },
147 {
148 /* IB */ BT SignedInt128, BT SignedInt128, BT SignedInt128, BT SignedInt128, BT SignedInt128, BT SignedInt128,
149 BT SignedInt128, BT SignedInt128, BT SignedInt128, BT SignedInt128, BT SignedInt128, BT SignedInt128,
150 BT SignedInt128, BT UnsignedInt128, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
151 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
152 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
153 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
154 },
155 {
156 /* UIB */ BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128,
157 BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128,
158 BT UnsignedInt128, BT UnsignedInt128, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
159 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
160 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
161 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
162 },
163 {
164 /* _FH */ BT Float16, BT Float16, BT Float16, BT Float16, BT Float16, BT Float16,
165 BT Float16, BT Float16, BT Float16, BT Float16, BT Float16, BT Float16,
166 BT Float16, BT Float16, BT Float16, BT Float16Complex, BT Float32, BT Float32Complex,
167 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
168 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
169 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
170 },
171 {
172 /* _FH */ BT Float16Complex, BT Float16Complex, BT Float16Complex, BT Float16Complex, BT Float16Complex, BT Float16Complex,
173 BT Float16Complex, BT Float16Complex, BT Float16Complex, BT Float16Complex, BT Float16Complex, BT Float16Complex,
174 BT Float16Complex, BT Float16Complex, BT Float16Complex, BT Float16Complex, BT Float32Complex, BT Float32Complex,
175 BT FloatComplex, BT FloatComplex, BT Float32xComplex, BT Float32xComplex, BT Float64Complex, BT Float64Complex,
176 BT DoubleComplex, BT DoubleComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float128Complex,
177 BT Float128Complex, BT Float128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT Float128xComplex, BT Float128xComplex,
178 },
179 {
180 /* _F */ BT Float32, BT Float32, BT Float32, BT Float32, BT Float32, BT Float32,
181 BT Float32, BT Float32, BT Float32, BT Float32, BT Float32, BT Float32,
182 BT Float32, BT Float32, BT Float32, BT Float32Complex, BT Float32, BT Float32Complex,
183 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
184 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
185 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
186 },
187 {
188 /* _FC */ BT Float32Complex, BT Float32Complex, BT Float32Complex, BT Float32Complex, BT Float32Complex, BT Float32Complex,
189 BT Float32Complex, BT Float32Complex, BT Float32Complex, BT Float32Complex, BT Float32Complex, BT Float32Complex,
190 BT Float32Complex, BT Float32Complex, BT Float32Complex, BT Float32Complex, BT Float32Complex, BT Float32Complex,
191 BT FloatComplex, BT FloatComplex, BT Float32xComplex, BT Float32xComplex, BT Float64Complex, BT Float64Complex,
192 BT DoubleComplex, BT DoubleComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float128Complex,
193 BT Float128Complex, BT Float128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT Float128xComplex, BT Float128xComplex,
194 },
195 {
196 /* F */ BT Float, BT Float, BT Float, BT Float, BT Float, BT Float,
197 BT Float, BT Float, BT Float, BT Float, BT Float, BT Float,
198 BT Float, BT Float, BT Float, BT FloatComplex, BT Float, BT FloatComplex,
199 BT Float, BT FloatComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
200 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
201 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
202 },
203 {
204 /* FC */ BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex,
205 BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex,
206 BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex,
207 BT FloatComplex, BT FloatComplex, BT Float32xComplex, BT Float32xComplex, BT Float64Complex, BT Float64Complex,
208 BT DoubleComplex, BT DoubleComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float128Complex,
209 BT Float128Complex, BT Float128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT Float128xComplex, BT Float128xComplex,
210 },
211 {
212 /* _FX */ BT Float32x, BT Float32x, BT Float32x, BT Float32x, BT Float32x, BT Float32x,
213 BT Float32x, BT Float32x, BT Float32x, BT Float32x, BT Float32x, BT Float32x,
214 BT Float32x, BT Float32x, BT Float32x, BT Float32xComplex, BT Float32x, BT Float32xComplex,
215 BT Float32x, BT Float32xComplex, BT Float32x, BT Float32xComplex, BT Float64, BT Float64Complex,
216 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
217 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
218 },
219 {
220 /* _FXC */ BT Float32xComplex, BT Float32xComplex, BT Float32xComplex, BT Float32xComplex, BT Float32xComplex, BT Float32xComplex,
221 BT Float32xComplex, BT Float32xComplex, BT Float32xComplex, BT Float32xComplex, BT Float32xComplex, BT Float32xComplex,
222 BT Float32xComplex, BT Float32xComplex, BT Float32xComplex, BT Float32xComplex, BT Float32xComplex, BT Float32xComplex,
223 BT Float32xComplex, BT Float32xComplex, BT Float32xComplex, BT Float32xComplex, BT Float64Complex, BT Float64Complex,
224 BT DoubleComplex, BT DoubleComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float128Complex,
225 BT Float128Complex, BT Float128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT Float128xComplex, BT Float128xComplex,
226 },
227 {
228 /* FD */ BT Float64, BT Float64, BT Float64, BT Float64, BT Float64, BT Float64,
229 BT Float64, BT Float64, BT Float64, BT Float64, BT Float64, BT Float64,
230 BT Float64, BT Float64, BT Float64, BT Float64Complex, BT Float64, BT Float64Complex,
231 BT Float64, BT Float64Complex, BT Float64, BT Float64Complex, BT Float64, BT Float64Complex,
232 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
233 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
234 },
235 {
236 /* _FDC */ BT Float64Complex, BT Float64Complex, BT Float64Complex, BT Float64Complex, BT Float64Complex, BT Float64Complex,
237 BT Float64Complex, BT Float64Complex, BT Float64Complex, BT Float64Complex, BT Float64Complex, BT Float64Complex,
238 BT Float64Complex, BT Float64Complex, BT Float64Complex, BT Float64Complex, BT Float64Complex, BT Float64Complex,
239 BT Float64Complex, BT Float64Complex, BT Float64Complex, BT Float64Complex, BT Float64Complex, BT Float64Complex,
240 BT DoubleComplex, BT DoubleComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float128Complex,
241 BT Float128Complex, BT Float128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT Float128xComplex, BT Float128xComplex,
242 },
243 {
244 /* D */ BT Double, BT Double, BT Double, BT Double, BT Double, BT Double,
245 BT Double, BT Double, BT Double, BT Double, BT Double, BT Double,
246 BT Double, BT Double, BT Double, BT DoubleComplex, BT Double, BT DoubleComplex,
247 BT Double, BT DoubleComplex, BT Double, BT DoubleComplex, BT Double, BT DoubleComplex,
248 BT Double, BT DoubleComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
249 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
250 },
251 {
252 /* DC */ BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex,
253 BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex,
254 BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex,
255 BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex,
256 BT DoubleComplex, BT DoubleComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float128Complex,
257 BT Float128Complex, BT Float128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT Float128xComplex, BT Float128xComplex,
258 },
259 {
260 /* F80X */ BT Float64x, BT Float64x, BT Float64x, BT Float64x, BT Float64x, BT Float64x,
261 BT Float64x, BT Float64x, BT Float64x, BT Float64x, BT Float64x, BT Float64x,
262 BT Float64x, BT Float64x, BT Float64x, BT Float64xComplex, BT Float64x, BT Float64xComplex,
263 BT Float64x, BT Float64xComplex, BT Float64x, BT Float64xComplex, BT Float64x, BT Float64xComplex,
264 BT Float64x, BT Float64xComplex, BT Float64x, BT Float64xComplex, BT Float80, BT Float128,
265 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
266 },
267 {
268 /* _FDXC */ BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex,
269 BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex,
270 BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex,
271 BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex,
272 BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float64xComplex, BT Float128Complex,
273 BT Float128Complex, BT Float128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT Float128xComplex, BT Float128xComplex,
274 },
275 {
276 /* F80 */ BT Float80, BT Float80, BT Float80, BT Float80, BT Float80, BT Float80,
277 BT Float80, BT Float80, BT Float80, BT Float80, BT Float80, BT Float80,
278 BT Float80, BT Float80, BT Float80, BT Float64xComplex, BT Float80, BT Float64xComplex,
279 BT Float80, BT Float64xComplex, BT Float80, BT Float64xComplex, BT Float80, BT Float64xComplex,
280 BT Float80, BT Float64xComplex, BT Float80, BT Float64xComplex, BT Float80, BT Float128,
281 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
282 },
283 {
284 /* _FB */ BT Float128, BT Float128, BT Float128, BT Float128, BT Float128, BT Float128,
285 BT Float128, BT Float128, BT Float128, BT Float128, BT Float128, BT Float128,
286 BT Float128, BT Float128, BT Float128, BT Float128Complex, BT Float128, BT Float128Complex,
287 BT Float128, BT Float128Complex, BT Float128, BT Float128Complex, BT Float128, BT Float128Complex,
288 BT Float128, BT Float128Complex, BT Float128, BT Float128Complex, BT Float128, BT Float128,
289 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
290 },
291 {
292 /* _FLDC */ BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex,
293 BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex,
294 BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex,
295 BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex,
296 BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex, BT Float128Complex,
297 BT Float128Complex, BT Float128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT Float128xComplex, BT Float128xComplex,
298 },
299 {
300 /* FB */ BT uuFloat128, BT uuFloat128, BT uuFloat128, BT uuFloat128, BT uuFloat128, BT uuFloat128,
301 BT uuFloat128, BT uuFloat128, BT uuFloat128, BT uuFloat128, BT uuFloat128, BT uuFloat128,
302 BT uuFloat128, BT uuFloat128, BT uuFloat128, BT Float128Complex, BT uuFloat128, BT Float128Complex,
303 BT uuFloat128, BT Float128Complex, BT uuFloat128, BT Float128Complex, BT uuFloat128, BT Float128Complex,
304 BT uuFloat128, BT Float128Complex, BT uuFloat128, BT Float128Complex, BT uuFloat128, BT uuFloat128,
305 BT Float128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
306 },
307 {
308 /* LD */ BT LongDouble, BT LongDouble, BT LongDouble, BT LongDouble, BT LongDouble, BT LongDouble,
309 BT LongDouble, BT LongDouble, BT LongDouble, BT LongDouble, BT LongDouble, BT LongDouble,
310 BT LongDouble, BT LongDouble, BT LongDouble, BT LongDoubleComplex, BT LongDouble, BT LongDoubleComplex,
311 BT LongDouble, BT LongDoubleComplex, BT LongDouble, BT LongDoubleComplex, BT LongDouble, BT LongDoubleComplex,
312 BT LongDouble, BT LongDoubleComplex, BT LongDouble, BT LongDoubleComplex, BT LongDouble, BT LongDouble,
313 BT LongDoubleComplex, BT LongDouble, BT LongDouble, BT LongDoubleComplex, BT Float128x, BT Float128xComplex,
314 },
315 {
316 /* LDC */ BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex,
317 BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex,
318 BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex,
319 BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex,
320 BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex,
321 BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT Float128xComplex, BT Float128xComplex,
322 },
323 {
324 /* _FBX */ BT Float128x, BT Float128x, BT Float128x, BT Float128x, BT Float128x, BT Float128x,
325 BT Float128x, BT Float128x, BT Float128x, BT Float128x, BT Float128x, BT Float128x,
326 BT Float128x, BT Float128x, BT Float128x, BT Float128xComplex, BT Float128x, BT Float128xComplex,
327 BT Float128x, BT Float128xComplex, BT Float128x, BT Float128xComplex, BT Float128x, BT Float128xComplex,
328 BT Float128x, BT Float128xComplex, BT Float128x, BT Float128xComplex, BT Float128x, BT Float128x,
329 BT Float128xComplex, BT Float128x, BT Float128x, BT Float128xComplex, BT Float128x, BT Float128xComplex,
330 },
331 {
332 /* _FLDXC */ BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex,
333 BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex,
334 BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex,
335 BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex,
336 BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex,
337 BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex, BT Float128xComplex,
338 },
339 }; // commonTypes
340 #undef BT
341 // GENERATED END
342 static_assert(
343 sizeof(commonTypes)/sizeof(commonTypes[0][0]) == ast::BasicKind::NUMBER_OF_BASIC_TYPES * ast::BasicKind::NUMBER_OF_BASIC_TYPES,
344 "Each basic type kind should have a corresponding row in the combined type matrix"
345 );
346
347class CommonType final : public ast::WithShortCircuiting {
348 const ast::Type * type2;
349 WidenMode widen;
350 ast::TypeEnvironment & tenv;
351 const ast::OpenVarSet & open;
352 ast::AssertionSet & need;
353 ast::AssertionSet & have;
354public:
355 ast::ptr< ast::Type > result;
356
357 CommonType(
358 const ast::Type * t2, WidenMode w,
359 ast::TypeEnvironment & env, const ast::OpenVarSet & o,
360 ast::AssertionSet & need, ast::AssertionSet & have )
361 : type2( t2 ), widen( w ), tenv( env ), open( o ), need (need), have (have) ,result() {}
362
363 void previsit( const ast::Node * ) { visit_children = false; }
364
365 void postvisit( const ast::VoidType * ) {}
366
367 void postvisit( const ast::BasicType * basic ) {
368 if ( auto basic2 = dynamic_cast< const ast::BasicType * >( type2 ) ) {
369 ast::BasicKind kind;
370 if (basic->kind != basic2->kind && !widen.first && !widen.second) return;
371 else if (!widen.first) kind = basic->kind; // widen.second
372 else if (!widen.second) kind = basic2->kind;
373 else kind = commonTypes[ basic->kind ][ basic2->kind ];
374 // xxx - what does qualifiers even do here??
375 if ( (basic->qualifiers >= basic2->qualifiers || widen.first)
376 && (basic->qualifiers <= basic2->qualifiers || widen.second) ) {
377 result = new ast::BasicType{ kind, basic->qualifiers | basic2->qualifiers };
378 }
379 } else if (
380 dynamic_cast< const ast::ZeroType * >( type2 )
381 || dynamic_cast< const ast::OneType * >( type2 )
382 ) {
383 if (widen.second) {
384 result = new ast::BasicType{ basic->kind, basic->qualifiers | type2->qualifiers };
385 }
386 } else if ( const ast::EnumInstType * enumInst = dynamic_cast< const ast::EnumInstType * >( type2 ) ) {
387 const ast::EnumDecl* enumDecl = enumInst->base;
388 if ( !enumDecl->isCfa ) {
389 ast::BasicKind kind = commonTypes[ basic->kind ][ ast::BasicKind::SignedInt ];
390 if (
391 ( ( kind == basic->kind && basic->qualifiers >= type2->qualifiers )
392 || widen.first )
393 && ( ( kind != basic->kind && basic->qualifiers <= type2->qualifiers )
394 || widen.second )
395 ) {
396 result = new ast::BasicType{ kind, basic->qualifiers | type2->qualifiers };
397 }
398 }
399 }
400 }
401
402private:
403 template< typename Pointer >
404 void getCommonWithVoidPointer( const Pointer * voidPtr, const Pointer * oPtr ) {
405 const ast::Type * base = oPtr->base;
406 if ( auto var = dynamic_cast< const ast::TypeInstType * >( base ) ) {
407 auto entry = open.find( *var );
408 if ( entry != open.end() ) {
409 ast::AssertionSet need, have;
410 if ( ! tenv.bindVar(
411 var, voidPtr->base, entry->second, need, have, open, widen )
412 ) return;
413 }
414 }
415 result = voidPtr;
416 add_qualifiers( result, oPtr->qualifiers );
417 }
418
419public:
420 void postvisit( const ast::PointerType * pointer ) {
421 if ( auto pointer2 = dynamic_cast< const ast::PointerType * >( type2 ) ) {
422 if (
423 widen.first
424 && pointer2->base.as< ast::VoidType >()
425 && ! ast::isFtype( pointer->base )
426 ) {
427 getCommonWithVoidPointer( pointer2, pointer );
428 } else if (
429 widen.second
430 && pointer->base.as< ast::VoidType >()
431 && ! ast::isFtype( pointer2->base )
432 ) {
433 getCommonWithVoidPointer( pointer, pointer2 );
434 } else if (
435 ( pointer->base->qualifiers >= pointer2->base->qualifiers || widen.first )
436 && ( pointer->base->qualifiers <= pointer2->base->qualifiers || widen.second )
437 ) {
438 ast::CV::Qualifiers q1 = pointer->base->qualifiers;
439 ast::CV::Qualifiers q2 = pointer2->base->qualifiers;
440
441 // force t{1,2} to be cloned if their qualifiers must be stripped, so that
442 // pointer{,2}->base are unchanged
443 ast::ptr< ast::Type > t1{ pointer->base }, t2{ pointer2->base };
444 reset_qualifiers( t1 );
445 reset_qualifiers( t2 );
446
447 ast::OpenVarSet newOpen{ open };
448 if ( unifyExact( t1, t2, tenv, have, need, newOpen, noWiden() ) ) {
449 result = pointer;
450 if ( q1.val != q2.val ) {
451 // reset result->base->qualifiers to be union of two base qualifiers
452 strict_dynamic_cast< ast::PointerType * >(
453 result.get_and_mutate()
454 )->base.get_and_mutate()->qualifiers = q1 | q2;
455 }
456 } else if ( isFtype (t1) && isFtype (t2) ) {
457 auto f1 = t1.as<ast::FunctionType>();
458 if (!f1) return;
459 auto f2 = t2.strict_as<ast::FunctionType>();
460
461 assertf(f1->returns.size() <= 1, "Function return should not be a list");
462 assertf(f2->returns.size() <= 1, "Function return should not be a list");
463
464 if (
465 ( f1->params.size() != f2->params.size() || f1->returns.size() != f2->returns.size() )
466 && ! f1->isTtype()
467 && ! f2->isTtype()
468 ) return;
469
470 auto params1 = flattenList( f1->params, tenv );
471 auto params2 = flattenList( f2->params, tenv );
472
473 auto crnt1 = params1.begin();
474 auto crnt2 = params2.begin();
475 auto end1 = params1.end();
476 auto end2 = params2.end();
477
478 while (crnt1 != end1 && crnt2 != end2 ) {
479 const ast::Type * arg1 = *crnt1;
480 const ast::Type * arg2 = *crnt2;
481
482 bool isTuple1 = Tuples::isTtype( t1 );
483 bool isTuple2 = Tuples::isTtype( t2 );
484
485 // assumes here that ttype *must* be last parameter
486 if ( isTuple1 && ! isTuple2 ) {
487 // combine remainder of list2, then unify
488 if (unifyExact(
489 arg1, tupleFromTypes( crnt2, end2 ), tenv, need, have, open,
490 noWiden() )) {
491 break;
492 } else return;
493 } else if ( ! isTuple1 && isTuple2 ) {
494 // combine remainder of list1, then unify
495 if (unifyExact(
496 tupleFromTypes( crnt1, end1 ), arg2, tenv, need, have, open,
497 noWiden() )) {
498 break;
499 } else return;
500 }
501
502 // allow qualifiers of pointer and reference base to become more specific
503 if (auto ref1 = dynamic_cast<const ast::ReferenceType *> (arg1)) {
504 if (auto ref2 = dynamic_cast<const ast::ReferenceType *> (arg2)) {
505 ast::ptr<ast::Type> base1 = ref1->base;
506 ast::ptr<ast::Type> base2 = ref2->base;
507
508 // xxx - assume LHS is always the target type
509
510 if ( ! ((widen.second && ref2->qualifiers.is_mutex)
511 || (ref1->qualifiers.is_mutex == ref2->qualifiers.is_mutex ))) return;
512
513 if ( (widen.second && base1->qualifiers <= base2->qualifiers ) || (base2->qualifiers == base1->qualifiers) ) {
514
515 reset_qualifiers(base1);
516 reset_qualifiers(base2);
517
518 if ( !unifyExact(
519 base1, base2, tenv, need, have, open, noWiden() )
520 ) return;
521 }
522 } else return;
523 } else if (auto ptr1 = dynamic_cast<const ast::PointerType *> (arg1)) {
524 if (auto ptr2 = dynamic_cast<const ast::PointerType *> (arg2)) {
525 ast::ptr<ast::Type> base1 = ptr1->base;
526 ast::ptr<ast::Type> base2 = ptr2->base;
527
528 // xxx - assume LHS is always the target type
529 // a function accepting const can always be called by non-const arg
530
531 if ( (widen.second && base1->qualifiers <= base2->qualifiers ) || (base2->qualifiers == base1->qualifiers) ) {
532
533 reset_qualifiers(base1);
534 reset_qualifiers(base2);
535
536 if ( ! unifyExact(
537 base1, base2, tenv, need, have, open, noWiden() )
538 ) return;
539 }
540 } else return;
541 } else if (! unifyExact(
542 arg1, arg2, tenv, need, have, open, noWiden() )) {
543 return;
544 }
545 ++crnt1; ++crnt2;
546 }
547 if ( crnt1 != end1 ) {
548 // try unifying empty tuple with ttype
549 const ast::Type * t1 = *crnt1;
550 if (! Tuples::isTtype( t1 ) ) return;
551 if (! unifyExact(
552 t1, tupleFromTypes( crnt2, end2 ), tenv, need, have, open,
553 noWiden() )) return;
554 } else if ( crnt2 != end2 ) {
555 // try unifying empty tuple with ttype
556 const ast::Type * t2 = *crnt2;
557 if ( !Tuples::isTtype( t2 ) ) return;
558 if ( !unifyExact(
559 tupleFromTypes( crnt1, end1 ), t2, tenv, need, have, open,
560 noWiden() )) return;
561 }
562 if ((f1->returns.size() == 0 && f2->returns.size() == 0)
563 || (f1->returns.size() == 1 && f2->returns.size() == 1 && unifyExact(f1->returns[0], f2->returns[0], tenv, need, have, open, noWiden()))) {
564 result = pointer;
565
566 for (auto & assn : f1->assertions) {
567 auto i = need.find(assn);
568 if (i != need.end()) i->second.isUsed = true;
569 auto j = have.find(assn);
570 if (j != have.end()) j->second.isUsed = true;
571 }
572
573 for (auto & assn : f2->assertions) {
574 auto i = need.find(assn);
575 if (i != need.end()) i->second.isUsed = true;
576 auto j = have.find(assn);
577 if (j != have.end()) j->second.isUsed = true;
578 }
579 }
580 } // if ftype
581 }
582 } else if ( widen.second && dynamic_cast< const ast::ZeroType * >( type2 ) ) {
583 result = pointer;
584 add_qualifiers( result, type2->qualifiers );
585 }
586 }
587
588 void postvisit( const ast::ArrayType * ) {}
589
590 void postvisit( const ast::ReferenceType * ref ) {
591 if ( auto ref2 = dynamic_cast< const ast::ReferenceType * >( type2 ) ) {
592 if (
593 widen.first && ref2->base.as< ast::VoidType >() && ! ast::isFtype( ref->base )
594 ) {
595 getCommonWithVoidPointer( ref2, ref );
596 } else if (
597 widen.second && ref->base.as< ast::VoidType>() && ! ast::isFtype( ref2->base )
598 ) {
599 getCommonWithVoidPointer( ref, ref2 );
600 } else if (
601 ( ref->base->qualifiers >= ref2->base->qualifiers || widen.first )
602 && ( ref->base->qualifiers <= ref2->base->qualifiers || widen.second )
603 ) {
604 ast::CV::Qualifiers q1 = ref->base->qualifiers, q2 = ref2->base->qualifiers;
605
606 // force t{1,2} to be cloned if their qualifiers must be stripped, so that
607 // ref{,2}->base are unchanged
608 ast::ptr< ast::Type > t1{ ref->base }, t2{ ref2->base };
609 reset_qualifiers( t1 );
610 reset_qualifiers( t2 );
611
612 ast::OpenVarSet newOpen{ open };
613 if ( unifyExact( t1, t2, tenv, have, need, newOpen, noWiden() ) ) {
614 result = ref;
615 if ( q1.val != q2.val ) {
616 // reset result->base->qualifiers to be union of two base qualifiers
617 strict_dynamic_cast< ast::ReferenceType * >(
618 result.get_and_mutate()
619 )->base.get_and_mutate()->qualifiers = q1 | q2;
620 }
621 }
622 }
623 } else if ( widen.second && dynamic_cast< const ast::ZeroType * >( type2 ) ) {
624 result = ref;
625 add_qualifiers( result, type2->qualifiers );
626 } else {
627 if (!dynamic_cast<const ast::EnumInstType *>(type2))
628 result = commonType( type2, ref, tenv, need, have, open, widen );
629 }
630 }
631
632 void postvisit( const ast::FunctionType * ) {}
633
634 void postvisit( const ast::StructInstType * ) {}
635
636 void postvisit( const ast::UnionInstType * ) {}
637
638 void postvisit( const ast::EnumInstType * param ) {
639 auto argAsEnumInst = dynamic_cast<const ast::EnumInstType *>(type2);
640 if ( argAsEnumInst ) {
641 const ast::EnumDecl* paramDecl = param->base;
642 const ast::EnumDecl* argDecl = argAsEnumInst->base;
643 if (argDecl->isSubTypeOf(paramDecl)) result = param;
644 } else if ( param->base && !param->base->isCfa ) {
645 auto basicType = new ast::BasicType( ast::BasicKind::UnsignedInt );
646 result = commonType( basicType, type2, tenv, need, have, open, widen);
647 }
648 }
649
650 void postvisit( const ast::TraitInstType * ) {}
651
652 void postvisit( const ast::TypeInstType * ) {}
653
654 void postvisit( const ast::TupleType * ) {}
655
656 void postvisit( const ast::VarArgsType * ) {}
657
658 void postvisit( const ast::ZeroType * zero ) {
659 if ( !widen.first ) return;
660 if ( dynamic_cast< const ast::BasicType * >( type2 )
661 || dynamic_cast< const ast::PointerType * >( type2 ) ) {
662 if ( widen.second || zero->qualifiers <= type2->qualifiers ) {
663 result = type2;
664 add_qualifiers( result, zero->qualifiers );
665 }
666 } else if ( widen.second && dynamic_cast< const ast::OneType * >( type2 ) ) {
667 result = new ast::BasicType{
668 ast::BasicKind::SignedInt, zero->qualifiers | type2->qualifiers };
669 } else if ( const ast::EnumInstType * enumInst = dynamic_cast< const ast::EnumInstType * >( type2 ) ) {
670 const ast::EnumDecl * enumDecl = enumInst->base;
671 if ( !enumDecl->base ) {
672 if ( widen.second || zero->qualifiers <= type2->qualifiers ) {
673 result = type2;
674 add_qualifiers( result, zero->qualifiers );
675 }
676 }
677 }
678 }
679
680 void postvisit( const ast::OneType * one ) {
681 if ( !widen.first ) return;
682 if ( dynamic_cast< const ast::BasicType * >( type2 ) ) {
683 if ( widen.second || one->qualifiers <= type2->qualifiers ) {
684 result = type2;
685 add_qualifiers( result, one->qualifiers );
686 }
687 } else if ( widen.second && dynamic_cast< const ast::ZeroType * >( type2 ) ) {
688 result = new ast::BasicType{
689 ast::BasicKind::SignedInt, one->qualifiers | type2->qualifiers };
690 } else if ( const ast::EnumInstType * enumInst = dynamic_cast< const ast::EnumInstType * >( type2 ) ) {
691 const ast::EnumDecl * enumDecl = enumInst->base;
692 if ( !enumDecl->base ) {
693 if ( widen.second || one->qualifiers <= type2->qualifiers ) {
694 result = type2;
695 add_qualifiers( result, one->qualifiers );
696 }
697 }
698 }
699 }
700};
701
702// size_t CommonType::traceId = Stats::Heap::new_stacktrace_id("CommonType");
703
704ast::ptr< ast::Type > handleReference(
705 const ast::ptr< ast::Type > & t1, const ast::ptr< ast::Type > & t2, WidenMode widen,
706 ast::TypeEnvironment & env,
707 const ast::OpenVarSet & open
708) {
709 ast::ptr<ast::Type> common;
710 ast::AssertionSet have, need;
711 ast::OpenVarSet newOpen( open );
712
713 // need unify to bind type variables
714 if ( unify( t1, t2, env, have, need, newOpen, common ) ) {
715 ast::CV::Qualifiers q1 = t1->qualifiers, q2 = t2->qualifiers;
716 PRINT(
717 std::cerr << "unify success: " << widenFirst << " " << widenSecond << std::endl;
718 )
719 if ( ( widen.first || q2 <= q1 ) && ( widen.second || q1 <= q2 ) ) {
720 PRINT(
721 std::cerr << "widen okay" << std::endl;
722 )
723 add_qualifiers( common, q1 | q2 );
724 return common;
725 }
726 }
727
728 PRINT(
729 std::cerr << "exact unify failed: " << t1 << " " << t2 << std::endl;
730 )
731 return { nullptr };
732}
733
734} // namespace
735
736ast::ptr< ast::Type > commonType(
737 const ast::ptr< ast::Type > & type1, const ast::ptr< ast::Type > & type2,
738 ast::TypeEnvironment & env, ast::AssertionSet & need, ast::AssertionSet & have,
739 const ast::OpenVarSet & open, WidenMode widen
740) {
741 unsigned depth1 = type1->referenceDepth();
742 unsigned depth2 = type2->referenceDepth();
743
744 if ( depth1 != depth2 ) { // implies depth1 > 0 || depth2 > 0
745 PRINT(
746 std::cerr << "reference depth diff: " << (depth1-depth2) << std::endl;
747 )
748 ast::ptr< ast::Type > result;
749 const ast::ReferenceType * ref1 = type1.as< ast::ReferenceType >();
750 const ast::ReferenceType * ref2 = type2.as< ast::ReferenceType >();
751
752 if ( depth1 > depth2 ) {
753 assert( ref1 );
754 result = handleReference( ref1->base, type2, widen, env, open );
755 } else { // Implies depth1 < depth2
756 assert( ref2 );
757 result = handleReference( type1, ref2->base, widen, env, open );
758 }
759
760 if ( result && ref1 ) {
761 // formal is reference, so result should be reference
762 PRINT(
763 std::cerr << "formal is reference; result should be reference" << std::endl;
764 )
765 result = new ast::ReferenceType{ result, ref1->qualifiers };
766 }
767
768 PRINT(
769 std::cerr << "common type of reference [" << type1 << "] and [" << type2 << "] is "
770 "[" << result << "]" << std::endl;
771 )
772 return result;
773 }
774 // otherwise both are reference types of the same depth and this is handled by the visitor
775 return ast::Pass<CommonType>::read( type1.get(),
776 type2, widen, env, open, need, have );
777}
778
779} // namespace ResolvExpr
780
781// Local Variables: //
782// tab-width: 4 //
783// mode: c++ //
784// compile-command: "make install" //
785// End: //
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