| 1 | // Copyright 2021 The Go Authors. All rights reserved. |
|---|---|
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | // go:build ignore |
| 6 | |
| 7 | package testdata |
| 8 | |
| 9 | type I interface { |
| 10 | Foo() string |
| 11 | } |
| 12 | |
| 13 | type J interface { |
| 14 | I |
| 15 | } |
| 16 | |
| 17 | type B struct { |
| 18 | p string |
| 19 | } |
| 20 | |
| 21 | func (b B) Foo() string { return b.p } |
| 22 | |
| 23 | func Baz(b1, b2 B, c1 chan I, c2 chan J) { |
| 24 | for { |
| 25 | select { |
| 26 | case c1 <- b1: |
| 27 | print("b1") |
| 28 | case c2 <- b2: |
| 29 | print("b2") |
| 30 | case <-c1: |
| 31 | print("c1") |
| 32 | case k := <-c2: |
| 33 | print(k.Foo()) |
| 34 | return |
| 35 | } |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | // Relevant SSA: |
| 40 | // func Baz(b1 B, b2 B, c1 chan I, c2 chan J): |
| 41 | // ... |
| 42 | // t2 = *t0 |
| 43 | // t3 = make I <- B (t2) |
| 44 | // t4 = *t1 |
| 45 | // t5 = make J <- B (t4) |
| 46 | // t6 = select blocking [c1<-t3, c2<-t5, <-c1, <-c2] (index int, ok bool, I, J) |
| 47 | // t7 = extract t6 #0 |
| 48 | // t8 = t7 == 0:int |
| 49 | // if t8 goto 2 else 3 |
| 50 | // ... |
| 51 | // 8: |
| 52 | // t15 = extract t6 #3 |
| 53 | // t16 = invoke t15.Foo() |
| 54 | // t17 = print(t18) |
| 55 | |
| 56 | // WANT: |
| 57 | // Local(t3) -> Channel(chan testdata.I) |
| 58 | // Local(t5) -> Channel(chan testdata.J) |
| 59 | // Channel(chan testdata.I) -> Local(t6[2]) |
| 60 | // Channel(chan testdata.J) -> Local(t6[3]) |
| 61 |