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source: src/ResolvExpr/CommonType.cc @ f1149ac

Last change on this file since f1149ac was f1149ac, checked in by JiadaL <j82liang@…>, 3 months ago
Remove unused variables
Property mode set to `100644`
File size: 51.2 KB

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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.cc --
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.h" // for unifyExact, WidenMode
26	#include "typeops.h" // for isFtype
27	#include "Tuples/Tuples.h"
28
29	// #define DEBUG
30	#ifdef DEBUG
31	#define PRINT(x) x
32	#else
33	#define PRINT(x)
34	#endif
35
36	namespace ResolvExpr {
37
38	// GENERATED START, DO NOT EDIT
39	// GENERATED BY BasicTypes-gen.cc
40	#define BT ast::BasicType::
41	static const BT Kind commonTypes[BT NUMBER_OF_BASIC_TYPES][BT NUMBER_OF_BASIC_TYPES] = { // nearest common ancestor
42	/* B C SC UC SI SUI
43	I UI LI LUI LLI LLUI
44	IB UIB _FH _FH _F _FC
45	F FC _FX _FXC FD _FDC
46	D DC F80X _FDXC F80 _FB
47	_FLDC FB LD LDC _FBX _FLDXC
48	*/
49	{
50	/* B */ BT Bool, BT Char, BT SignedChar, BT UnsignedChar, BT ShortSignedInt, BT ShortUnsignedInt,
51	BT SignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
52	BT SignedInt128, BT UnsignedInt128, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
53	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
54	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
55	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
56	},
57	{
58	/* C */ BT Char, BT Char, BT SignedChar, BT UnsignedChar, BT ShortSignedInt, BT ShortUnsignedInt,
59	BT SignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
60	BT SignedInt128, BT UnsignedInt128, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
61	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
62	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
63	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
64	},
65	{
66	/* SC */ BT SignedChar, BT SignedChar, BT SignedChar, BT UnsignedChar, BT ShortSignedInt, BT ShortUnsignedInt,
67	BT SignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
68	BT SignedInt128, BT UnsignedInt128, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
69	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
70	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
71	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
72	},
73	{
74	/* UC */ BT UnsignedChar, BT UnsignedChar, BT UnsignedChar, BT UnsignedChar, BT ShortSignedInt, BT ShortUnsignedInt,
75	BT SignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
76	BT SignedInt128, BT UnsignedInt128, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
77	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
78	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
79	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
80	},
81	{
82	/* SI */ BT ShortSignedInt, BT ShortSignedInt, BT ShortSignedInt, BT ShortSignedInt, BT ShortSignedInt, BT ShortUnsignedInt,
83	BT SignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
84	BT SignedInt128, BT UnsignedInt128, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
85	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
86	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
87	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
88	},
89	{
90	/* SUI */ BT ShortUnsignedInt, BT ShortUnsignedInt, BT ShortUnsignedInt, BT ShortUnsignedInt, BT ShortUnsignedInt, BT ShortUnsignedInt,
91	BT SignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
92	BT SignedInt128, BT UnsignedInt128, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
93	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
94	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
95	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
96	},
97	{
98	/* I */ BT SignedInt, BT SignedInt, BT SignedInt, BT SignedInt, BT SignedInt, BT SignedInt,
99	BT SignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
100	BT SignedInt128, BT UnsignedInt128, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
101	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
102	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
103	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
104	},
105	{
106	/* UI */ BT UnsignedInt, BT UnsignedInt, BT UnsignedInt, BT UnsignedInt, BT UnsignedInt, BT UnsignedInt,
107	BT UnsignedInt, BT UnsignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
108	BT SignedInt128, BT UnsignedInt128, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
109	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
110	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
111	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
112	},
113	{
114	/* LI */ BT LongSignedInt, BT LongSignedInt, BT LongSignedInt, BT LongSignedInt, BT LongSignedInt, BT LongSignedInt,
115	BT LongSignedInt, BT LongSignedInt, BT LongSignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
116	BT SignedInt128, BT UnsignedInt128, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
117	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
118	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
119	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
120	},
121	{
122	/* LUI */ BT LongUnsignedInt, BT LongUnsignedInt, BT LongUnsignedInt, BT LongUnsignedInt, BT LongUnsignedInt, BT LongUnsignedInt,
123	BT LongUnsignedInt, BT LongUnsignedInt, BT LongUnsignedInt, BT LongUnsignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
124	BT SignedInt128, BT UnsignedInt128, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
125	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
126	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
127	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
128	},
129	{
130	/* LLI */ BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongSignedInt,
131	BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongSignedInt, BT LongLongUnsignedInt,
132	BT SignedInt128, BT UnsignedInt128, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
133	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
134	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
135	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
136	},
137	{
138	/* LLUI */ BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt,
139	BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt, BT LongLongUnsignedInt,
140	BT SignedInt128, BT UnsignedInt128, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
141	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
142	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
143	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
144	},
145	{
146	/* IB */ BT SignedInt128, BT SignedInt128, BT SignedInt128, BT SignedInt128, BT SignedInt128, BT SignedInt128,
147	BT SignedInt128, BT SignedInt128, BT SignedInt128, BT SignedInt128, BT SignedInt128, BT SignedInt128,
148	BT SignedInt128, BT UnsignedInt128, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
149	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
150	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
151	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
152	},
153	{
154	/* UIB */ BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128,
155	BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128, BT UnsignedInt128,
156	BT UnsignedInt128, BT UnsignedInt128, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
157	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
158	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
159	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
160	},
161	{
162	/* _FH */ BT uFloat16, BT uFloat16, BT uFloat16, BT uFloat16, BT uFloat16, BT uFloat16,
163	BT uFloat16, BT uFloat16, BT uFloat16, BT uFloat16, BT uFloat16, BT uFloat16,
164	BT uFloat16, BT uFloat16, BT uFloat16, BT uFloat16Complex, BT uFloat32, BT uFloat32Complex,
165	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
166	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
167	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
168	},
169	{
170	/* _FH */ BT uFloat16Complex, BT uFloat16Complex, BT uFloat16Complex, BT uFloat16Complex, BT uFloat16Complex, BT uFloat16Complex,
171	BT uFloat16Complex, BT uFloat16Complex, BT uFloat16Complex, BT uFloat16Complex, BT uFloat16Complex, BT uFloat16Complex,
172	BT uFloat16Complex, BT uFloat16Complex, BT uFloat16Complex, BT uFloat16Complex, BT uFloat32Complex, BT uFloat32Complex,
173	BT FloatComplex, BT FloatComplex, BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat64Complex, BT uFloat64Complex,
174	BT DoubleComplex, BT DoubleComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat128Complex,
175	BT uFloat128Complex, BT uFloat128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT uFloat128xComplex, BT uFloat128xComplex,
176	},
177	{
178	/* _F */ BT uFloat32, BT uFloat32, BT uFloat32, BT uFloat32, BT uFloat32, BT uFloat32,
179	BT uFloat32, BT uFloat32, BT uFloat32, BT uFloat32, BT uFloat32, BT uFloat32,
180	BT uFloat32, BT uFloat32, BT uFloat32, BT uFloat32Complex, BT uFloat32, BT uFloat32Complex,
181	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
182	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
183	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
184	},
185	{
186	/* _FC */ BT uFloat32Complex, BT uFloat32Complex, BT uFloat32Complex, BT uFloat32Complex, BT uFloat32Complex, BT uFloat32Complex,
187	BT uFloat32Complex, BT uFloat32Complex, BT uFloat32Complex, BT uFloat32Complex, BT uFloat32Complex, BT uFloat32Complex,
188	BT uFloat32Complex, BT uFloat32Complex, BT uFloat32Complex, BT uFloat32Complex, BT uFloat32Complex, BT uFloat32Complex,
189	BT FloatComplex, BT FloatComplex, BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat64Complex, BT uFloat64Complex,
190	BT DoubleComplex, BT DoubleComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat128Complex,
191	BT uFloat128Complex, BT uFloat128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT uFloat128xComplex, BT uFloat128xComplex,
192	},
193	{
194	/* F */ BT Float, BT Float, BT Float, BT Float, BT Float, BT Float,
195	BT Float, BT Float, BT Float, BT Float, BT Float, BT Float,
196	BT Float, BT Float, BT Float, BT FloatComplex, BT Float, BT FloatComplex,
197	BT Float, BT FloatComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
198	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
199	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
200	},
201	{
202	/* FC */ BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex,
203	BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex,
204	BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex, BT FloatComplex,
205	BT FloatComplex, BT FloatComplex, BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat64Complex, BT uFloat64Complex,
206	BT DoubleComplex, BT DoubleComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat128Complex,
207	BT uFloat128Complex, BT uFloat128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT uFloat128xComplex, BT uFloat128xComplex,
208	},
209	{
210	/* _FX */ BT uFloat32x, BT uFloat32x, BT uFloat32x, BT uFloat32x, BT uFloat32x, BT uFloat32x,
211	BT uFloat32x, BT uFloat32x, BT uFloat32x, BT uFloat32x, BT uFloat32x, BT uFloat32x,
212	BT uFloat32x, BT uFloat32x, BT uFloat32x, BT uFloat32xComplex, BT uFloat32x, BT uFloat32xComplex,
213	BT uFloat32x, BT uFloat32xComplex, BT uFloat32x, BT uFloat32xComplex, BT uFloat64, BT uFloat64Complex,
214	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
215	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
216	},
217	{
218	/* _FXC */ BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat32xComplex,
219	BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat32xComplex,
220	BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat32xComplex,
221	BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat32xComplex, BT uFloat64Complex, BT uFloat64Complex,
222	BT DoubleComplex, BT DoubleComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat128Complex,
223	BT uFloat128Complex, BT uFloat128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT uFloat128xComplex, BT uFloat128xComplex,
224	},
225	{
226	/* FD */ BT uFloat64, BT uFloat64, BT uFloat64, BT uFloat64, BT uFloat64, BT uFloat64,
227	BT uFloat64, BT uFloat64, BT uFloat64, BT uFloat64, BT uFloat64, BT uFloat64,
228	BT uFloat64, BT uFloat64, BT uFloat64, BT uFloat64Complex, BT uFloat64, BT uFloat64Complex,
229	BT uFloat64, BT uFloat64Complex, BT uFloat64, BT uFloat64Complex, BT uFloat64, BT uFloat64Complex,
230	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
231	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
232	},
233	{
234	/* _FDC */ BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex,
235	BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex,
236	BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex,
237	BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex, BT uFloat64Complex,
238	BT DoubleComplex, BT DoubleComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat128Complex,
239	BT uFloat128Complex, BT uFloat128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT uFloat128xComplex, BT uFloat128xComplex,
240	},
241	{
242	/* D */ BT Double, BT Double, BT Double, BT Double, BT Double, BT Double,
243	BT Double, BT Double, BT Double, BT Double, BT Double, BT Double,
244	BT Double, BT Double, BT Double, BT DoubleComplex, BT Double, BT DoubleComplex,
245	BT Double, BT DoubleComplex, BT Double, BT DoubleComplex, BT Double, BT DoubleComplex,
246	BT Double, BT DoubleComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
247	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
248	},
249	{
250	/* DC */ BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex,
251	BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex, BT DoubleComplex,
252	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 uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat128Complex,
255	BT uFloat128Complex, BT uFloat128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT uFloat128xComplex, BT uFloat128xComplex,
256	},
257	{
258	/* F80X */ BT uFloat64x, BT uFloat64x, BT uFloat64x, BT uFloat64x, BT uFloat64x, BT uFloat64x,
259	BT uFloat64x, BT uFloat64x, BT uFloat64x, BT uFloat64x, BT uFloat64x, BT uFloat64x,
260	BT uFloat64x, BT uFloat64x, BT uFloat64x, BT uFloat64xComplex, BT uFloat64x, BT uFloat64xComplex,
261	BT uFloat64x, BT uFloat64xComplex, BT uFloat64x, BT uFloat64xComplex, BT uFloat64x, BT uFloat64xComplex,
262	BT uFloat64x, BT uFloat64xComplex, BT uFloat64x, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
263	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
264	},
265	{
266	/* _FDXC */ BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex,
267	BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex,
268	BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex,
269	BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex,
270	BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat64xComplex, BT uFloat128Complex,
271	BT uFloat128Complex, BT uFloat128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT uFloat128xComplex, BT uFloat128xComplex,
272	},
273	{
274	/* F80 */ BT uuFloat80, BT uuFloat80, BT uuFloat80, BT uuFloat80, BT uuFloat80, BT uuFloat80,
275	BT uuFloat80, BT uuFloat80, BT uuFloat80, BT uuFloat80, BT uuFloat80, BT uuFloat80,
276	BT uuFloat80, BT uuFloat80, BT uuFloat80, BT uFloat64xComplex, BT uuFloat80, BT uFloat64xComplex,
277	BT uuFloat80, BT uFloat64xComplex, BT uuFloat80, BT uFloat64xComplex, BT uuFloat80, BT uFloat64xComplex,
278	BT uuFloat80, BT uFloat64xComplex, BT uuFloat80, BT uFloat64xComplex, BT uuFloat80, BT uFloat128,
279	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
280	},
281	{
282	/* _FB */ BT uFloat128, BT uFloat128, BT uFloat128, BT uFloat128, BT uFloat128, BT uFloat128,
283	BT uFloat128, BT uFloat128, BT uFloat128, BT uFloat128, BT uFloat128, BT uFloat128,
284	BT uFloat128, BT uFloat128, BT uFloat128, BT uFloat128Complex, BT uFloat128, BT uFloat128Complex,
285	BT uFloat128, BT uFloat128Complex, BT uFloat128, BT uFloat128Complex, BT uFloat128, BT uFloat128Complex,
286	BT uFloat128, BT uFloat128Complex, BT uFloat128, BT uFloat128Complex, BT uFloat128, BT uFloat128,
287	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
288	},
289	{
290	/* _FLDC */ BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex,
291	BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex,
292	BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex,
293	BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex,
294	BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex, BT uFloat128Complex,
295	BT uFloat128Complex, BT uFloat128Complex, BT LongDoubleComplex, BT LongDoubleComplex, BT uFloat128xComplex, BT uFloat128xComplex,
296	},
297	{
298	/* FB */ BT uuFloat128, BT uuFloat128, BT uuFloat128, BT uuFloat128, BT uuFloat128, BT uuFloat128,
299	BT uuFloat128, BT uuFloat128, BT uuFloat128, BT uuFloat128, BT uuFloat128, BT uuFloat128,
300	BT uuFloat128, BT uuFloat128, BT uuFloat128, BT uFloat128Complex, BT uuFloat128, BT uFloat128Complex,
301	BT uuFloat128, BT uFloat128Complex, BT uuFloat128, BT uFloat128Complex, BT uuFloat128, BT uFloat128Complex,
302	BT uuFloat128, BT uFloat128Complex, BT uuFloat128, BT uFloat128Complex, BT uuFloat128, BT uuFloat128,
303	BT uFloat128Complex, BT uuFloat128, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
304	},
305	{
306	/* LD */ BT LongDouble, BT LongDouble, BT LongDouble, BT LongDouble, BT LongDouble, BT LongDouble,
307	BT LongDouble, BT LongDouble, BT LongDouble, BT LongDouble, BT LongDouble, BT LongDouble,
308	BT LongDouble, BT LongDouble, BT LongDouble, BT LongDoubleComplex, BT LongDouble, BT LongDoubleComplex,
309	BT LongDouble, BT LongDoubleComplex, BT LongDouble, BT LongDoubleComplex, BT LongDouble, BT LongDoubleComplex,
310	BT LongDouble, BT LongDoubleComplex, BT LongDouble, BT LongDoubleComplex, BT LongDouble, BT LongDouble,
311	BT LongDoubleComplex, BT LongDouble, BT LongDouble, BT LongDoubleComplex, BT uFloat128x, BT uFloat128xComplex,
312	},
313	{
314	/* LDC */ BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex,
315	BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex, BT LongDoubleComplex,
316	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 uFloat128xComplex, BT uFloat128xComplex,
320	},
321	{
322	/* _FBX */ BT uFloat128x, BT uFloat128x, BT uFloat128x, BT uFloat128x, BT uFloat128x, BT uFloat128x,
323	BT uFloat128x, BT uFloat128x, BT uFloat128x, BT uFloat128x, BT uFloat128x, BT uFloat128x,
324	BT uFloat128x, BT uFloat128x, BT uFloat128x, BT uFloat128xComplex, BT uFloat128x, BT uFloat128xComplex,
325	BT uFloat128x, BT uFloat128xComplex, BT uFloat128x, BT uFloat128xComplex, BT uFloat128x, BT uFloat128xComplex,
326	BT uFloat128x, BT uFloat128xComplex, BT uFloat128x, BT uFloat128xComplex, BT uFloat128x, BT uFloat128x,
327	BT uFloat128xComplex, BT uFloat128x, BT uFloat128x, BT uFloat128xComplex, BT uFloat128x, BT uFloat128xComplex,
328	},
329	{
330	/* _FLDXC */ BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex,
331	BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex,
332	BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex,
333	BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex,
334	BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex,
335	BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex, BT uFloat128xComplex,
336	},
337	}; // commonTypes
338	#undef BT
339	// GENERATED END
340	static_assert(
341	sizeof(commonTypes)/sizeof(commonTypes[0][0]) == ast::BasicType::NUMBER_OF_BASIC_TYPES * ast::BasicType::NUMBER_OF_BASIC_TYPES,
342	"Each basic type kind should have a corresponding row in the combined type matrix"
343	);
344
345	class CommonType final : public ast::WithShortCircuiting {
346	const ast::Type * type2;
347	WidenMode widen;
348	ast::TypeEnvironment & tenv;
349	const ast::OpenVarSet & open;
350	ast::AssertionSet & need;
351	ast::AssertionSet & have;
352	public:
353	static size_t traceId;
354	ast::ptr< ast::Type > result;
355
356	CommonType(
357	const ast::Type * t2, WidenMode w,
358	ast::TypeEnvironment & env, const ast::OpenVarSet & o,
359	ast::AssertionSet & need, ast::AssertionSet & have )
360	: type2( t2 ), widen( w ), tenv( env ), open( o ), need (need), have (have) ,result() {}
361
362	void previsit( const ast::Node * ) { visit_children = false; }
363
364	void postvisit( const ast::VoidType * ) {}
365
366	void postvisit( const ast::BasicType * basic ) {
367	if ( auto basic2 = dynamic_cast< const ast::BasicType * >( type2 ) ) {
368	ast::BasicType::Kind kind;
369	if (basic->kind != basic2->kind && !widen.first && !widen.second) return;
370	else if (!widen.first) kind = basic->kind; // widen.second
371	else if (!widen.second) kind = basic2->kind;
372	else kind = commonTypes[ basic->kind ][ basic2->kind ];
373	// xxx - what does qualifiers even do here??
374	if ( (basic->qualifiers >= basic2->qualifiers \|\| widen.first)
375	&& (basic->qualifiers <= basic2->qualifiers \|\| widen.second) ) {
376	result = new ast::BasicType{ kind, basic->qualifiers \| basic2->qualifiers };
377	}
378	} else if (
379	dynamic_cast< const ast::ZeroType * >( type2 )
380	\|\| dynamic_cast< const ast::OneType * >( type2 )
381	) {
382	if (widen.second) {
383	result = new ast::BasicType{ basic->kind, basic->qualifiers \| type2->qualifiers };
384	}
385	} else if ( const ast::EnumInstType * enumInst = dynamic_cast< const ast::EnumInstType * >( type2 ) ) {
386	const ast::EnumDecl* enumDecl = enumInst->base;
387	if ( enumDecl->base ) {
388	result = enumDecl->base.get();
389	} else {
390	ast::BasicType::Kind kind = commonTypes[ basic->kind ][ ast::BasicType::SignedInt ];
391	if (
392	( ( kind == basic->kind && basic->qualifiers >= type2->qualifiers )
393	\|\| widen.first )
394	&& ( ( kind != basic->kind && basic->qualifiers <= type2->qualifiers )
395	\|\| widen.second )
396	) {
397	result = new ast::BasicType{ kind, basic->qualifiers \| type2->qualifiers };
398	}
399	}
400	} else if ( dynamic_cast< const ast::EnumPosType * >( type2 ) ) {
401	ast::BasicType::Kind kind = commonTypes[ basic->kind ][ ast::BasicType::SignedInt ];
402	if (
403	( ( kind == basic->kind && basic->qualifiers >= type2->qualifiers )
404	\|\| widen.first )
405	&& ( ( kind != basic->kind && basic->qualifiers <= type2->qualifiers )
406	\|\| widen.second )
407	) {
408	result = new ast::BasicType{ kind, basic->qualifiers \| type2->qualifiers };
409	}
410	}
411	}
412
413	private:
414	template< typename Pointer >
415	void getCommonWithVoidPointer( const Pointer * voidPtr, const Pointer * oPtr ) {
416	const ast::Type * base = oPtr->base;
417	if ( auto var = dynamic_cast< const ast::TypeInstType * >( base ) ) {
418	auto entry = open.find( *var );
419	if ( entry != open.end() ) {
420	ast::AssertionSet need, have;
421	if ( ! tenv.bindVar(
422	var, voidPtr->base, entry->second, need, have, open, widen )
423	) return;
424	}
425	}
426	result = voidPtr;
427	add_qualifiers( result, oPtr->qualifiers );
428	}
429
430	// For a typed enum, we want to unify type1 with the base type of the enum
431	bool tryResolveWithTypedEnum( const ast::Type * type1 ) {
432	if (auto enumInst = dynamic_cast<const ast::EnumInstType *> (type2) ) {
433	ast::OpenVarSet newOpen{ open };
434	if (enumInst->base->base
435	&& unifyExact(type1, enumInst->base->base, tenv, need, have, newOpen, widen)) {
436	result = type1;
437	return true;
438	}
439	}
440	return false;
441	}
442
443	public:
444	void postvisit( const ast::PointerType * pointer ) {
445	if ( auto pointer2 = dynamic_cast< const ast::PointerType * >( type2 ) ) {
446	if (
447	widen.first
448	&& pointer2->base.as< ast::VoidType >()
449	&& ! ast::isFtype( pointer->base )
450	) {
451	getCommonWithVoidPointer( pointer2, pointer );
452	} else if (
453	widen.second
454	&& pointer->base.as< ast::VoidType >()
455	&& ! ast::isFtype( pointer2->base )
456	) {
457	getCommonWithVoidPointer( pointer, pointer2 );
458	} else if (
459	( pointer->base->qualifiers >= pointer2->base->qualifiers \|\| widen.first )
460	&& ( pointer->base->qualifiers <= pointer2->base->qualifiers \|\| widen.second )
461	) {
462	ast::CV::Qualifiers q1 = pointer->base->qualifiers;
463	ast::CV::Qualifiers q2 = pointer2->base->qualifiers;
464
465	// force t{1,2} to be cloned if their qualifiers must be stripped, so that
466	// pointer{,2}->base are unchanged
467	ast::ptr< ast::Type > t1{ pointer->base }, t2{ pointer2->base };
468	reset_qualifiers( t1 );
469	reset_qualifiers( t2 );
470
471	ast::OpenVarSet newOpen{ open };
472	if ( unifyExact( t1, t2, tenv, have, need, newOpen, noWiden() ) ) {
473	result = pointer;
474	if ( q1.val != q2.val ) {
475	// reset result->base->qualifiers to be union of two base qualifiers
476	strict_dynamic_cast< ast::PointerType * >(
477	result.get_and_mutate()
478	)->base.get_and_mutate()->qualifiers = q1 \| q2;
479	}
480	} else if ( isFtype (t1) && isFtype (t2) ) {
481	auto f1 = t1.as<ast::FunctionType>();
482	if (!f1) return;
483	auto f2 = t2.strict_as<ast::FunctionType>();
484
485	assertf(f1->returns.size() <= 1, "Function return should not be a list");
486	assertf(f2->returns.size() <= 1, "Function return should not be a list");
487
488	if (
489	( f1->params.size() != f2->params.size() \|\| f1->returns.size() != f2->returns.size() )
490	&& ! f1->isTtype()
491	&& ! f2->isTtype()
492	) return;
493
494	auto params1 = flattenList( f1->params, tenv );
495	auto params2 = flattenList( f2->params, tenv );
496
497	auto crnt1 = params1.begin();
498	auto crnt2 = params2.begin();
499	auto end1 = params1.end();
500	auto end2 = params2.end();
501
502	while (crnt1 != end1 && crnt2 != end2 ) {
503	const ast::Type * arg1 = *crnt1;
504	const ast::Type * arg2 = *crnt2;
505
506	bool isTuple1 = Tuples::isTtype( t1 );
507	bool isTuple2 = Tuples::isTtype( t2 );
508
509	// assumes here that ttype must be last parameter
510	if ( isTuple1 && ! isTuple2 ) {
511	// combine remainder of list2, then unify
512	if (unifyExact(
513	arg1, tupleFromTypes( crnt2, end2 ), tenv, need, have, open,
514	noWiden() )) {
515	break;
516	} else return;
517	} else if ( ! isTuple1 && isTuple2 ) {
518	// combine remainder of list1, then unify
519	if (unifyExact(
520	tupleFromTypes( crnt1, end1 ), arg2, tenv, need, have, open,
521	noWiden() )) {
522	break;
523	} else return;
524	}
525
526	// allow qualifiers of pointer and reference base to become more specific
527	if (auto ref1 = dynamic_cast<const ast::ReferenceType *> (arg1)) {
528	if (auto ref2 = dynamic_cast<const ast::ReferenceType *> (arg2)) {
529	ast::ptr<ast::Type> base1 = ref1->base;
530	ast::ptr<ast::Type> base2 = ref2->base;
531
532	// xxx - assume LHS is always the target type
533
534	if ( ! ((widen.second && ref2->qualifiers.is_mutex)
535	\|\| (ref1->qualifiers.is_mutex == ref2->qualifiers.is_mutex ))) return;
536
537	if ( (widen.second && base1->qualifiers <= base2->qualifiers ) \|\| (base2->qualifiers == base1->qualifiers) ) {
538
539	reset_qualifiers(base1);
540	reset_qualifiers(base2);
541
542	if ( !unifyExact(
543	base1, base2, tenv, need, have, open, noWiden() )
544	) return;
545	}
546	} else return;
547	} else if (auto ptr1 = dynamic_cast<const ast::PointerType *> (arg1)) {
548	if (auto ptr2 = dynamic_cast<const ast::PointerType *> (arg2)) {
549	ast::ptr<ast::Type> base1 = ptr1->base;
550	ast::ptr<ast::Type> base2 = ptr2->base;
551
552	// xxx - assume LHS is always the target type
553	// a function accepting const can always be called by non-const arg
554
555	if ( (widen.second && base1->qualifiers <= base2->qualifiers ) \|\| (base2->qualifiers == base1->qualifiers) ) {
556
557	reset_qualifiers(base1);
558	reset_qualifiers(base2);
559
560	if ( ! unifyExact(
561	base1, base2, tenv, need, have, open, noWiden() )
562	) return;
563	}
564	} else return;
565	} else if (! unifyExact(
566	arg1, arg2, tenv, need, have, open, noWiden() )) {
567	return;
568	}
569	++crnt1; ++crnt2;
570	}
571	if ( crnt1 != end1 ) {
572	// try unifying empty tuple with ttype
573	const ast::Type * t1 = *crnt1;
574	if (! Tuples::isTtype( t1 ) ) return;
575	if (! unifyExact(
576	t1, tupleFromTypes( crnt2, end2 ), tenv, need, have, open,
577	noWiden() )) return;
578	} else if ( crnt2 != end2 ) {
579	// try unifying empty tuple with ttype
580	const ast::Type * t2 = *crnt2;
581	if ( !Tuples::isTtype( t2 ) ) return;
582	if ( !unifyExact(
583	tupleFromTypes( crnt1, end1 ), t2, tenv, need, have, open,
584	noWiden() )) return;
585	}
586	if ((f1->returns.size() == 0 && f2->returns.size() == 0)
587	\|\| (f1->returns.size() == 1 && f2->returns.size() == 1 && unifyExact(f1->returns[0], f2->returns[0], tenv, need, have, open, noWiden()))) {
588	result = pointer;
589
590	for (auto & assn : f1->assertions) {
591	auto i = need.find(assn);
592	if (i != need.end()) i->second.isUsed = true;
593	auto j = have.find(assn);
594	if (j != have.end()) j->second.isUsed = true;
595	}
596
597	for (auto & assn : f2->assertions) {
598	auto i = need.find(assn);
599	if (i != need.end()) i->second.isUsed = true;
600	auto j = have.find(assn);
601	if (j != have.end()) j->second.isUsed = true;
602	}
603	}
604	} // if ftype
605	}
606	} else if ( widen.second && dynamic_cast< const ast::ZeroType * >( type2 ) ) {
607	result = pointer;
608	add_qualifiers( result, type2->qualifiers );
609	} else {
610	tryResolveWithTypedEnum( pointer );
611	}
612	}
613
614	void postvisit( const ast::ArrayType * arr ) {
615	// xxx - does it make sense?
616	tryResolveWithTypedEnum( arr );
617	}
618
619	void postvisit( const ast::ReferenceType * ref ) {
620	if ( auto ref2 = dynamic_cast< const ast::ReferenceType * >( type2 ) ) {
621	if (
622	widen.first && ref2->base.as< ast::VoidType >() && ! ast::isFtype( ref->base )
623	) {
624	getCommonWithVoidPointer( ref2, ref );
625	} else if (
626	widen.second && ref->base.as< ast::VoidType>() && ! ast::isFtype( ref2->base )
627	) {
628	getCommonWithVoidPointer( ref, ref2 );
629	} else if (
630	( ref->base->qualifiers >= ref2->base->qualifiers \|\| widen.first )
631	&& ( ref->base->qualifiers <= ref2->base->qualifiers \|\| widen.second )
632	) {
633	ast::CV::Qualifiers q1 = ref->base->qualifiers, q2 = ref2->base->qualifiers;
634
635	// force t{1,2} to be cloned if their qualifiers must be stripped, so that
636	// ref{,2}->base are unchanged
637	ast::ptr< ast::Type > t1{ ref->base }, t2{ ref2->base };
638	reset_qualifiers( t1 );
639	reset_qualifiers( t2 );
640
641	ast::OpenVarSet newOpen{ open };
642	if ( unifyExact( t1, t2, tenv, have, need, newOpen, noWiden() ) ) {
643	result = ref;
644	if ( q1.val != q2.val ) {
645	// reset result->base->qualifiers to be union of two base qualifiers
646	strict_dynamic_cast< ast::ReferenceType * >(
647	result.get_and_mutate()
648	)->base.get_and_mutate()->qualifiers = q1 \| q2;
649	}
650	}
651	}
652	} else if ( widen.second && dynamic_cast< const ast::ZeroType * >( type2 ) ) {
653	result = ref;
654	add_qualifiers( result, type2->qualifiers );
655	} else {
656	if (!dynamic_cast<const ast::EnumInstType *>(type2))
657	result = commonType( type2, ref, tenv, need, have, open, widen );
658	}
659	}
660
661	void postvisit( const ast::FunctionType * func) {
662	tryResolveWithTypedEnum( func );
663	}
664
665	void postvisit( const ast::StructInstType * inst ) {
666	tryResolveWithTypedEnum( inst );
667	}
668
669	void postvisit( const ast::UnionInstType * inst ) {
670	tryResolveWithTypedEnum( inst );
671	}
672
673	void postvisit( const ast::EnumInstType * enumInst ) {
674	if (!dynamic_cast<const ast::EnumInstType *>(type2))
675	result = commonType( type2, enumInst, tenv, need, have, open, widen);
676	}
677
678	void postvisit( const ast::TraitInstType * ) {}
679
680	void postvisit( const ast::TypeInstType * ) {}
681
682	void postvisit( const ast::TupleType * tuple ) {
683	tryResolveWithTypedEnum( tuple );
684	}
685
686	void postvisit( const ast::VarArgsType * ) {}
687
688	void postvisit( const ast::ZeroType * zero ) {
689	if ( !widen.first ) return;
690	if ( dynamic_cast< const ast::BasicType * >( type2 )
691	\|\| dynamic_cast< const ast::PointerType * >( type2 ) ) {
692	if ( widen.second \|\| zero->qualifiers <= type2->qualifiers ) {
693	result = type2;
694	add_qualifiers( result, zero->qualifiers );
695	}
696	} else if ( widen.second && dynamic_cast< const ast::OneType * >( type2 ) ) {
697	result = new ast::BasicType{
698	ast::BasicType::SignedInt, zero->qualifiers \| type2->qualifiers };
699	} else if ( const ast::EnumInstType * enumInst = dynamic_cast< const ast::EnumInstType * >( type2 ) ) {
700	const ast::EnumDecl * enumDecl = enumInst->base;
701	if ( enumDecl->base ) {
702	if ( tryResolveWithTypedEnum( zero ) )
703	add_qualifiers( result, zero->qualifiers );
704	} else {
705	if ( widen.second \|\| zero->qualifiers <= type2->qualifiers ) {
706	result = type2;
707	add_qualifiers( result, zero->qualifiers );
708	}
709	}
710	}
711	}
712
713	void postvisit( const ast::OneType * one ) {
714	if ( !widen.first ) return;
715	if ( dynamic_cast< const ast::BasicType * >( type2 ) ) {
716	if ( widen.second \|\| one->qualifiers <= type2->qualifiers ) {
717	result = type2;
718	add_qualifiers( result, one->qualifiers );
719	}
720	} else if ( widen.second && dynamic_cast< const ast::ZeroType * >( type2 ) ) {
721	result = new ast::BasicType{
722	ast::BasicType::SignedInt, one->qualifiers \| type2->qualifiers };
723	} else if ( const ast::EnumInstType * enumInst = dynamic_cast< const ast::EnumInstType * >( type2 ) ) {
724	const ast::EnumDecl * enumBase = enumInst->base;
725	if ( enumBase->base ) {
726	if ( tryResolveWithTypedEnum( one ))
727	add_qualifiers( result, one->qualifiers );
728	} else {
729	if ( widen.second \|\| one->qualifiers <= type2->qualifiers ) {
730	result = type2;
731	add_qualifiers( result, one->qualifiers );
732	}
733	}
734	}
735	}
736	};
737
738	// size_t CommonType::traceId = Stats::Heap::new_stacktrace_id("CommonType");
739
740	namespace {
741	ast::ptr< ast::Type > handleReference(
742	const ast::ptr< ast::Type > & t1, const ast::ptr< ast::Type > & t2, WidenMode widen,
743	ast::TypeEnvironment & env,
744	const ast::OpenVarSet & open
745	) {
746	ast::ptr<ast::Type> common;
747	ast::AssertionSet have, need;
748	ast::OpenVarSet newOpen{ open };
749
750	// need unify to bind type variables
751	if ( unify( t1, t2, env, have, need, newOpen, common ) ) {
752	ast::CV::Qualifiers q1 = t1->qualifiers, q2 = t2->qualifiers;
753	PRINT(
754	std::cerr << "unify success: " << widenFirst << " " << widenSecond << std::endl;
755	)
756	if ( ( widen.first \|\| q2 <= q1 ) && ( widen.second \|\| q1 <= q2 ) ) {
757	PRINT(
758	std::cerr << "widen okay" << std::endl;
759	)
760	add_qualifiers( common, q1 \| q2 );
761	return common;
762	}
763	}
764
765	PRINT(
766	std::cerr << "exact unify failed: " << t1 << " " << t2 << std::endl;
767	)
768	return { nullptr };
769	}
770	}
771
772	ast::ptr< ast::Type > commonType(
773	const ast::ptr< ast::Type > & type1, const ast::ptr< ast::Type > & type2,
774	ast::TypeEnvironment & env, ast::AssertionSet & need, ast::AssertionSet & have,
775	const ast::OpenVarSet & open, WidenMode widen
776	) {
777	unsigned depth1 = type1->referenceDepth();
778	unsigned depth2 = type2->referenceDepth();
779
780	if ( depth1 != depth2 ) { // implies depth1 > 0 \|\| depth2 > 0
781	PRINT(
782	std::cerr << "reference depth diff: " << (depth1-depth2) << std::endl;
783	)
784	ast::ptr< ast::Type > result;
785	const ast::ReferenceType * ref1 = type1.as< ast::ReferenceType >();
786	const ast::ReferenceType * ref2 = type2.as< ast::ReferenceType >();
787
788	if ( depth1 > depth2 ) {
789	assert( ref1 );
790	result = handleReference( ref1->base, type2, widen, env, open );
791	} else { // Implies depth1 < depth2
792	assert( ref2 );
793	result = handleReference( type1, ref2->base, widen, env, open );
794	}
795
796	if ( result && ref1 ) {
797	// formal is reference, so result should be reference
798	PRINT(
799	std::cerr << "formal is reference; result should be reference" << std::endl;
800	)
801	result = new ast::ReferenceType{ result, ref1->qualifiers };
802	}
803
804	PRINT(
805	std::cerr << "common type of reference [" << type1 << "] and [" << type2 << "] is "
806	"[" << result << "]" << std::endl;
807	)
808	return result;
809	}
810	// otherwise both are reference types of the same depth and this is handled by the visitor
811	ast::Pass<CommonType> visitor{ type2, widen, env, open, need, have };
812	type1->accept( visitor );
813	// ast::ptr< ast::Type > result = visitor.core.result;
814
815	return visitor.core.result;
816	}
817
818	} // namespace ResolvExpr
819
820	// Local Variables: //
821	// tab-width: 4 //
822	// mode: c++ //
823	// compile-command: "make install" //
824	// End: //

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