mirror of
https://github.com/golang/go
synced 2024-07-03 00:40:45 +00:00
a1bcee4f1c
Gccgo CL 184998 added optimizations for one- and two-case select statements. But it didn't handle break statement in the select case correctly. The fix is CL 185519. This CL adds a test. Change-Id: Ide1b199f106172b41dd77c1f6e0d662fccdd8cc5 Reviewed-on: https://go-review.googlesource.com/c/go/+/185520 Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
56 lines
826 B
Go
56 lines
826 B
Go
// run
|
|
|
|
// Copyright 2019 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.
|
|
|
|
// Test break statements in a select.
|
|
// Gccgo had a bug in handling this.
|
|
// Test 1,2,3-case selects, so it covers both the general
|
|
// code path and the specialized optimizations for one-
|
|
// and two-case selects.
|
|
|
|
package main
|
|
|
|
var ch = make(chan int)
|
|
|
|
func main() {
|
|
go func() {
|
|
for {
|
|
ch <- 5
|
|
}
|
|
}()
|
|
|
|
select {
|
|
case <-ch:
|
|
break
|
|
panic("unreachable")
|
|
}
|
|
|
|
select {
|
|
default:
|
|
break
|
|
panic("unreachable")
|
|
}
|
|
|
|
select {
|
|
case <-ch:
|
|
break
|
|
panic("unreachable")
|
|
default:
|
|
break
|
|
panic("unreachable")
|
|
}
|
|
|
|
select {
|
|
case <-ch:
|
|
break
|
|
panic("unreachable")
|
|
case ch <- 10:
|
|
panic("unreachable")
|
|
default:
|
|
break
|
|
panic("unreachable")
|
|
}
|
|
}
|