mirror of
https://github.com/golang/go
synced 2024-11-14 08:40:27 -07:00
22 lines
514 B
Go
22 lines
514 B
Go
// run
|
|
|
|
// Test for 8g register move bug. The optimizer gets confused
|
|
// about 16- vs 32-bit moves during splitContractIndex.
|
|
|
|
// Issue 3910.
|
|
|
|
package main
|
|
|
|
func main() {
|
|
const c = 0x12345678
|
|
index, n, offset := splitContractIndex(c)
|
|
if index != int((c&0xffff)>>5) || n != int(c&(1<<5-1)) || offset != (c>>16)&(1<<14-1) {
|
|
println("BUG", index, n, offset)
|
|
}
|
|
}
|
|
|
|
func splitContractIndex(ce uint32) (index, n, offset int) {
|
|
h := uint16(ce)
|
|
return int(h >> 5), int(h & (1<<5 - 1)), int(ce>>16) & (1<<14 - 1)
|
|
}
|