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-rw-r--r--test/fixedbugs/issue2615.go547
1 files changed, 547 insertions, 0 deletions
diff --git a/test/fixedbugs/issue2615.go b/test/fixedbugs/issue2615.go
new file mode 100644
index 000000000..686e1e1ad
--- /dev/null
+++ b/test/fixedbugs/issue2615.go
@@ -0,0 +1,547 @@
+// run
+
+// Copyright 2012 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.
+
+// Issue 2615: a long chain of else if's causes an overflow
+// in the parser stack.
+
+package main
+
+// test returns the index of the lowest set bit in a 256-bit vector.
+func test(x [4]uint64) int {
+ if x[0]&(1<<0) != 0 {
+ return 0
+ } else if x[0]&(1<<1) != 0 {
+ return 1
+ } else if x[0]&(1<<2) != 0 {
+ return 2
+ } else if x[0]&(1<<3) != 0 {
+ return 3
+ } else if x[0]&(1<<4) != 0 {
+ return 4
+ } else if x[0]&(1<<5) != 0 {
+ return 5
+ } else if x[0]&(1<<6) != 0 {
+ return 6
+ } else if x[0]&(1<<7) != 0 {
+ return 7
+ } else if x[0]&(1<<8) != 0 {
+ return 8
+ } else if x[0]&(1<<9) != 0 {
+ return 9
+ } else if x[0]&(1<<10) != 0 {
+ return 10
+ } else if x[0]&(1<<11) != 0 {
+ return 11
+ } else if x[0]&(1<<12) != 0 {
+ return 12
+ } else if x[0]&(1<<13) != 0 {
+ return 13
+ } else if x[0]&(1<<14) != 0 {
+ return 14
+ } else if x[0]&(1<<15) != 0 {
+ return 15
+ } else if x[0]&(1<<16) != 0 {
+ return 16
+ } else if x[0]&(1<<17) != 0 {
+ return 17
+ } else if x[0]&(1<<18) != 0 {
+ return 18
+ } else if x[0]&(1<<19) != 0 {
+ return 19
+ } else if x[0]&(1<<20) != 0 {
+ return 20
+ } else if x[0]&(1<<21) != 0 {
+ return 21
+ } else if x[0]&(1<<22) != 0 {
+ return 22
+ } else if x[0]&(1<<23) != 0 {
+ return 23
+ } else if x[0]&(1<<24) != 0 {
+ return 24
+ } else if x[0]&(1<<25) != 0 {
+ return 25
+ } else if x[0]&(1<<26) != 0 {
+ return 26
+ } else if x[0]&(1<<27) != 0 {
+ return 27
+ } else if x[0]&(1<<28) != 0 {
+ return 28
+ } else if x[0]&(1<<29) != 0 {
+ return 29
+ } else if x[0]&(1<<30) != 0 {
+ return 30
+ } else if x[0]&(1<<31) != 0 {
+ return 31
+ } else if x[0]&(1<<32) != 0 {
+ return 32
+ } else if x[0]&(1<<33) != 0 {
+ return 33
+ } else if x[0]&(1<<34) != 0 {
+ return 34
+ } else if x[0]&(1<<35) != 0 {
+ return 35
+ } else if x[0]&(1<<36) != 0 {
+ return 36
+ } else if x[0]&(1<<37) != 0 {
+ return 37
+ } else if x[0]&(1<<38) != 0 {
+ return 38
+ } else if x[0]&(1<<39) != 0 {
+ return 39
+ } else if x[0]&(1<<40) != 0 {
+ return 40
+ } else if x[0]&(1<<41) != 0 {
+ return 41
+ } else if x[0]&(1<<42) != 0 {
+ return 42
+ } else if x[0]&(1<<43) != 0 {
+ return 43
+ } else if x[0]&(1<<44) != 0 {
+ return 44
+ } else if x[0]&(1<<45) != 0 {
+ return 45
+ } else if x[0]&(1<<46) != 0 {
+ return 46
+ } else if x[0]&(1<<47) != 0 {
+ return 47
+ } else if x[0]&(1<<48) != 0 {
+ return 48
+ } else if x[0]&(1<<49) != 0 {
+ return 49
+ } else if x[0]&(1<<50) != 0 {
+ return 50
+ } else if x[0]&(1<<51) != 0 {
+ return 51
+ } else if x[0]&(1<<52) != 0 {
+ return 52
+ } else if x[0]&(1<<53) != 0 {
+ return 53
+ } else if x[0]&(1<<54) != 0 {
+ return 54
+ } else if x[0]&(1<<55) != 0 {
+ return 55
+ } else if x[0]&(1<<56) != 0 {
+ return 56
+ } else if x[0]&(1<<57) != 0 {
+ return 57
+ } else if x[0]&(1<<58) != 0 {
+ return 58
+ } else if x[0]&(1<<59) != 0 {
+ return 59
+ } else if x[0]&(1<<60) != 0 {
+ return 60
+ } else if x[0]&(1<<61) != 0 {
+ return 61
+ } else if x[0]&(1<<62) != 0 {
+ return 62
+ } else if x[0]&(1<<63) != 0 {
+ return 63
+ } else if x[1]&(1<<0) != 0 {
+ return 64
+ } else if x[1]&(1<<1) != 0 {
+ return 65
+ } else if x[1]&(1<<2) != 0 {
+ return 66
+ } else if x[1]&(1<<3) != 0 {
+ return 67
+ } else if x[1]&(1<<4) != 0 {
+ return 68
+ } else if x[1]&(1<<5) != 0 {
+ return 69
+ } else if x[1]&(1<<6) != 0 {
+ return 70
+ } else if x[1]&(1<<7) != 0 {
+ return 71
+ } else if x[1]&(1<<8) != 0 {
+ return 72
+ } else if x[1]&(1<<9) != 0 {
+ return 73
+ } else if x[1]&(1<<10) != 0 {
+ return 74
+ } else if x[1]&(1<<11) != 0 {
+ return 75
+ } else if x[1]&(1<<12) != 0 {
+ return 76
+ } else if x[1]&(1<<13) != 0 {
+ return 77
+ } else if x[1]&(1<<14) != 0 {
+ return 78
+ } else if x[1]&(1<<15) != 0 {
+ return 79
+ } else if x[1]&(1<<16) != 0 {
+ return 80
+ } else if x[1]&(1<<17) != 0 {
+ return 81
+ } else if x[1]&(1<<18) != 0 {
+ return 82
+ } else if x[1]&(1<<19) != 0 {
+ return 83
+ } else if x[1]&(1<<20) != 0 {
+ return 84
+ } else if x[1]&(1<<21) != 0 {
+ return 85
+ } else if x[1]&(1<<22) != 0 {
+ return 86
+ } else if x[1]&(1<<23) != 0 {
+ return 87
+ } else if x[1]&(1<<24) != 0 {
+ return 88
+ } else if x[1]&(1<<25) != 0 {
+ return 89
+ } else if x[1]&(1<<26) != 0 {
+ return 90
+ } else if x[1]&(1<<27) != 0 {
+ return 91
+ } else if x[1]&(1<<28) != 0 {
+ return 92
+ } else if x[1]&(1<<29) != 0 {
+ return 93
+ } else if x[1]&(1<<30) != 0 {
+ return 94
+ } else if x[1]&(1<<31) != 0 {
+ return 95
+ } else if x[1]&(1<<32) != 0 {
+ return 96
+ } else if x[1]&(1<<33) != 0 {
+ return 97
+ } else if x[1]&(1<<34) != 0 {
+ return 98
+ } else if x[1]&(1<<35) != 0 {
+ return 99
+ } else if x[1]&(1<<36) != 0 {
+ return 100
+ } else if x[1]&(1<<37) != 0 {
+ return 101
+ } else if x[1]&(1<<38) != 0 {
+ return 102
+ } else if x[1]&(1<<39) != 0 {
+ return 103
+ } else if x[1]&(1<<40) != 0 {
+ return 104
+ } else if x[1]&(1<<41) != 0 {
+ return 105
+ } else if x[1]&(1<<42) != 0 {
+ return 106
+ } else if x[1]&(1<<43) != 0 {
+ return 107
+ } else if x[1]&(1<<44) != 0 {
+ return 108
+ } else if x[1]&(1<<45) != 0 {
+ return 109
+ } else if x[1]&(1<<46) != 0 {
+ return 110
+ } else if x[1]&(1<<47) != 0 {
+ return 111
+ } else if x[1]&(1<<48) != 0 {
+ return 112
+ } else if x[1]&(1<<49) != 0 {
+ return 113
+ } else if x[1]&(1<<50) != 0 {
+ return 114
+ } else if x[1]&(1<<51) != 0 {
+ return 115
+ } else if x[1]&(1<<52) != 0 {
+ return 116
+ } else if x[1]&(1<<53) != 0 {
+ return 117
+ } else if x[1]&(1<<54) != 0 {
+ return 118
+ } else if x[1]&(1<<55) != 0 {
+ return 119
+ } else if x[1]&(1<<56) != 0 {
+ return 120
+ } else if x[1]&(1<<57) != 0 {
+ return 121
+ } else if x[1]&(1<<58) != 0 {
+ return 122
+ } else if x[1]&(1<<59) != 0 {
+ return 123
+ } else if x[1]&(1<<60) != 0 {
+ return 124
+ } else if x[1]&(1<<61) != 0 {
+ return 125
+ } else if x[1]&(1<<62) != 0 {
+ return 126
+ } else if x[1]&(1<<63) != 0 {
+ return 127
+ } else if x[2]&(1<<0) != 0 {
+ return 128
+ } else if x[2]&(1<<1) != 0 {
+ return 129
+ } else if x[2]&(1<<2) != 0 {
+ return 130
+ } else if x[2]&(1<<3) != 0 {
+ return 131
+ } else if x[2]&(1<<4) != 0 {
+ return 132
+ } else if x[2]&(1<<5) != 0 {
+ return 133
+ } else if x[2]&(1<<6) != 0 {
+ return 134
+ } else if x[2]&(1<<7) != 0 {
+ return 135
+ } else if x[2]&(1<<8) != 0 {
+ return 136
+ } else if x[2]&(1<<9) != 0 {
+ return 137
+ } else if x[2]&(1<<10) != 0 {
+ return 138
+ } else if x[2]&(1<<11) != 0 {
+ return 139
+ } else if x[2]&(1<<12) != 0 {
+ return 140
+ } else if x[2]&(1<<13) != 0 {
+ return 141
+ } else if x[2]&(1<<14) != 0 {
+ return 142
+ } else if x[2]&(1<<15) != 0 {
+ return 143
+ } else if x[2]&(1<<16) != 0 {
+ return 144
+ } else if x[2]&(1<<17) != 0 {
+ return 145
+ } else if x[2]&(1<<18) != 0 {
+ return 146
+ } else if x[2]&(1<<19) != 0 {
+ return 147
+ } else if x[2]&(1<<20) != 0 {
+ return 148
+ } else if x[2]&(1<<21) != 0 {
+ return 149
+ } else if x[2]&(1<<22) != 0 {
+ return 150
+ } else if x[2]&(1<<23) != 0 {
+ return 151
+ } else if x[2]&(1<<24) != 0 {
+ return 152
+ } else if x[2]&(1<<25) != 0 {
+ return 153
+ } else if x[2]&(1<<26) != 0 {
+ return 154
+ } else if x[2]&(1<<27) != 0 {
+ return 155
+ } else if x[2]&(1<<28) != 0 {
+ return 156
+ } else if x[2]&(1<<29) != 0 {
+ return 157
+ } else if x[2]&(1<<30) != 0 {
+ return 158
+ } else if x[2]&(1<<31) != 0 {
+ return 159
+ } else if x[2]&(1<<32) != 0 {
+ return 160
+ } else if x[2]&(1<<33) != 0 {
+ return 161
+ } else if x[2]&(1<<34) != 0 {
+ return 162
+ } else if x[2]&(1<<35) != 0 {
+ return 163
+ } else if x[2]&(1<<36) != 0 {
+ return 164
+ } else if x[2]&(1<<37) != 0 {
+ return 165
+ } else if x[2]&(1<<38) != 0 {
+ return 166
+ } else if x[2]&(1<<39) != 0 {
+ return 167
+ } else if x[2]&(1<<40) != 0 {
+ return 168
+ } else if x[2]&(1<<41) != 0 {
+ return 169
+ } else if x[2]&(1<<42) != 0 {
+ return 170
+ } else if x[2]&(1<<43) != 0 {
+ return 171
+ } else if x[2]&(1<<44) != 0 {
+ return 172
+ } else if x[2]&(1<<45) != 0 {
+ return 173
+ } else if x[2]&(1<<46) != 0 {
+ return 174
+ } else if x[2]&(1<<47) != 0 {
+ return 175
+ } else if x[2]&(1<<48) != 0 {
+ return 176
+ } else if x[2]&(1<<49) != 0 {
+ return 177
+ } else if x[2]&(1<<50) != 0 {
+ return 178
+ } else if x[2]&(1<<51) != 0 {
+ return 179
+ } else if x[2]&(1<<52) != 0 {
+ return 180
+ } else if x[2]&(1<<53) != 0 {
+ return 181
+ } else if x[2]&(1<<54) != 0 {
+ return 182
+ } else if x[2]&(1<<55) != 0 {
+ return 183
+ } else if x[2]&(1<<56) != 0 {
+ return 184
+ } else if x[2]&(1<<57) != 0 {
+ return 185
+ } else if x[2]&(1<<58) != 0 {
+ return 186
+ } else if x[2]&(1<<59) != 0 {
+ return 187
+ } else if x[2]&(1<<60) != 0 {
+ return 188
+ } else if x[2]&(1<<61) != 0 {
+ return 189
+ } else if x[2]&(1<<62) != 0 {
+ return 190
+ } else if x[2]&(1<<63) != 0 {
+ return 191
+ } else if x[3]&(1<<0) != 0 {
+ return 192
+ } else if x[3]&(1<<1) != 0 {
+ return 193
+ } else if x[3]&(1<<2) != 0 {
+ return 194
+ } else if x[3]&(1<<3) != 0 {
+ return 195
+ } else if x[3]&(1<<4) != 0 {
+ return 196
+ } else if x[3]&(1<<5) != 0 {
+ return 197
+ } else if x[3]&(1<<6) != 0 {
+ return 198
+ } else if x[3]&(1<<7) != 0 {
+ return 199
+ } else if x[3]&(1<<8) != 0 {
+ return 200
+ } else if x[3]&(1<<9) != 0 {
+ return 201
+ } else if x[3]&(1<<10) != 0 {
+ return 202
+ } else if x[3]&(1<<11) != 0 {
+ return 203
+ } else if x[3]&(1<<12) != 0 {
+ return 204
+ } else if x[3]&(1<<13) != 0 {
+ return 205
+ } else if x[3]&(1<<14) != 0 {
+ return 206
+ } else if x[3]&(1<<15) != 0 {
+ return 207
+ } else if x[3]&(1<<16) != 0 {
+ return 208
+ } else if x[3]&(1<<17) != 0 {
+ return 209
+ } else if x[3]&(1<<18) != 0 {
+ return 210
+ } else if x[3]&(1<<19) != 0 {
+ return 211
+ } else if x[3]&(1<<20) != 0 {
+ return 212
+ } else if x[3]&(1<<21) != 0 {
+ return 213
+ } else if x[3]&(1<<22) != 0 {
+ return 214
+ } else if x[3]&(1<<23) != 0 {
+ return 215
+ } else if x[3]&(1<<24) != 0 {
+ return 216
+ } else if x[3]&(1<<25) != 0 {
+ return 217
+ } else if x[3]&(1<<26) != 0 {
+ return 218
+ } else if x[3]&(1<<27) != 0 {
+ return 219
+ } else if x[3]&(1<<28) != 0 {
+ return 220
+ } else if x[3]&(1<<29) != 0 {
+ return 221
+ } else if x[3]&(1<<30) != 0 {
+ return 222
+ } else if x[3]&(1<<31) != 0 {
+ return 223
+ } else if x[3]&(1<<32) != 0 {
+ return 224
+ } else if x[3]&(1<<33) != 0 {
+ return 225
+ } else if x[3]&(1<<34) != 0 {
+ return 226
+ } else if x[3]&(1<<35) != 0 {
+ return 227
+ } else if x[3]&(1<<36) != 0 {
+ return 228
+ } else if x[3]&(1<<37) != 0 {
+ return 229
+ } else if x[3]&(1<<38) != 0 {
+ return 230
+ } else if x[3]&(1<<39) != 0 {
+ return 231
+ } else if x[3]&(1<<40) != 0 {
+ return 232
+ } else if x[3]&(1<<41) != 0 {
+ return 233
+ } else if x[3]&(1<<42) != 0 {
+ return 234
+ } else if x[3]&(1<<43) != 0 {
+ return 235
+ } else if x[3]&(1<<44) != 0 {
+ return 236
+ } else if x[3]&(1<<45) != 0 {
+ return 237
+ } else if x[3]&(1<<46) != 0 {
+ return 238
+ } else if x[3]&(1<<47) != 0 {
+ return 239
+ } else if x[3]&(1<<48) != 0 {
+ return 240
+ } else if x[3]&(1<<49) != 0 {
+ return 241
+ } else if x[3]&(1<<50) != 0 {
+ return 242
+ } else if x[3]&(1<<51) != 0 {
+ return 243
+ } else if x[3]&(1<<52) != 0 {
+ return 244
+ } else if x[3]&(1<<53) != 0 {
+ return 245
+ } else if x[3]&(1<<54) != 0 {
+ return 246
+ } else if x[3]&(1<<55) != 0 {
+ return 247
+ } else if x[3]&(1<<56) != 0 {
+ return 248
+ } else if x[3]&(1<<57) != 0 {
+ return 249
+ } else if x[3]&(1<<58) != 0 {
+ return 250
+ } else if x[3]&(1<<59) != 0 {
+ return 251
+ } else if x[3]&(1<<60) != 0 {
+ return 252
+ } else if x[3]&(1<<61) != 0 {
+ return 253
+ } else if x[3]&(1<<62) != 0 {
+ return 254
+ } else if x[3]&(1<<63) != 0 {
+ return 255
+ }
+ return -1
+}
+
+func main() {
+ const ones = ^uint64(0)
+ for i := 0; i < 256; i++ {
+ bits := [4]uint64{ones, ones, ones, ones}
+
+ // clear bottom i bits
+ bits[i/64] ^= 1<<(uint(i)&63) - 1
+ for j := i/64 - 1; j >= 0; j-- {
+ bits[j] = 0
+ }
+
+ k := test(bits)
+ if k != i {
+ print("test(bits)=", k, " want ", i, "\n")
+ panic("failed")
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 18:40:01 +0000