1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
// asmcheck
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package codegen
// This file contains code generation tests related to the handling of
// map types.
// ------------------- //
// Access Const //
// ------------------- //
// Direct use of constants in fast map access calls (Issue #19015).
func AccessInt1(m map[int]int) int {
// amd64:"MOV[LQ]\t[$]5"
return m[5]
}
func AccessInt2(m map[int]int) bool {
// amd64:"MOV[LQ]\t[$]5"
_, ok := m[5]
return ok
}
func AccessString1(m map[string]int) int {
// amd64:`.*"abc"`
return m["abc"]
}
func AccessString2(m map[string]int) bool {
// amd64:`.*"abc"`
_, ok := m["abc"]
return ok
}
// ------------------- //
// String Conversion //
// ------------------- //
func LookupStringConversionSimple(m map[string]int, bytes []byte) int {
// amd64:-`.*runtime\.slicebytetostring\(`
return m[string(bytes)]
}
func LookupStringConversionStructLit(m map[struct{ string }]int, bytes []byte) int {
// amd64:-`.*runtime\.slicebytetostring\(`
return m[struct{ string }{string(bytes)}]
}
func LookupStringConversionArrayLit(m map[[2]string]int, bytes []byte) int {
// amd64:-`.*runtime\.slicebytetostring\(`
return m[[2]string{string(bytes), string(bytes)}]
}
func LookupStringConversionNestedLit(m map[[1]struct{ s [1]string }]int, bytes []byte) int {
// amd64:-`.*runtime\.slicebytetostring\(`
return m[[1]struct{ s [1]string }{struct{ s [1]string }{s: [1]string{string(bytes)}}}]
}
func LookupStringConversionKeyedArrayLit(m map[[2]string]int, bytes []byte) int {
// amd64:-`.*runtime\.slicebytetostring\(`
return m[[2]string{0: string(bytes)}]
}
// ------------------- //
// Map Clear //
// ------------------- //
// Optimization of map clear idiom (Issue #20138).
func MapClearReflexive(m map[int]int) {
// amd64:`.*runtime\.mapclear`
// amd64:-`.*runtime\.mapiterinit`
for k := range m {
delete(m, k)
}
}
func MapClearIndirect(m map[int]int) {
s := struct{ m map[int]int }{m: m}
// amd64:`.*runtime\.mapclear`
// amd64:-`.*runtime\.mapiterinit`
for k := range s.m {
delete(s.m, k)
}
}
func MapClearPointer(m map[*byte]int) {
// amd64:`.*runtime\.mapclear`
// amd64:-`.*runtime\.mapiterinit`
for k := range m {
delete(m, k)
}
}
func MapClearNotReflexive(m map[float64]int) {
// amd64:`.*runtime\.mapiterinit`
// amd64:-`.*runtime\.mapclear`
for k := range m {
delete(m, k)
}
}
func MapClearInterface(m map[interface{}]int) {
// amd64:`.*runtime\.mapiterinit`
// amd64:-`.*runtime\.mapclear`
for k := range m {
delete(m, k)
}
}
func MapClearSideEffect(m map[int]int) int {
k := 0
// amd64:`.*runtime\.mapiterinit`
// amd64:-`.*runtime\.mapclear`
for k = range m {
delete(m, k)
}
return k
}
func MapLiteralSizing(x int) (map[int]int, map[int]int) {
// This is tested for internal/abi/maps.go:MapBucketCountBits={3,4,5}
// amd64:"MOVL\t[$]33,"
m := map[int]int{
0: 0,
1: 1,
2: 2,
3: 3,
4: 4,
5: 5,
6: 6,
7: 7,
8: 8,
9: 9,
10: 10,
11: 11,
12: 12,
13: 13,
14: 14,
15: 15,
16: 16,
17: 17,
18: 18,
19: 19,
20: 20,
21: 21,
22: 22,
23: 23,
24: 24,
25: 25,
26: 26,
27: 27,
28: 28,
29: 29,
30: 30,
31: 32,
32: 32,
}
// amd64:"MOVL\t[$]33,"
n := map[int]int{
0: 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: 16,
17: 17,
18: 18,
19: 19,
20: 20,
21: 21,
22: 22,
23: 23,
24: 24,
25: 25,
26: 26,
27: 27,
28: 28,
29: 29,
30: 30,
31: 32,
32: 32,
}
return m, n
}
|
