go bug440_64 源码
golang bug440_64 代码
文件路径：/test/fixedbugs/bug440_64.go
// run
// Test for 6g register move bug. The optimizer gets confused
// about 32- vs 64-bit moves during splitContractIndex.
// Issue 3918.
package main
func main() {
const c = 0x123400005678
index, offset := splitContractIndex(c)
if index != (c&0xffffffff)>>5 || offset != c+1 {
println("BUG", index, offset)
}
}
func splitContractIndex(ce uint64) (index uint32, offset uint64) {
h := uint32(ce)
return h >> 5, ce + 1
}
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