| 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() |
| 11 | } |
| 12 | |
| 13 | type A struct{} |
| 14 | |
| 15 | func (a A) Foo() {} |
| 16 | |
| 17 | type B struct{} |
| 18 | |
| 19 | func (b B) Foo() {} |
| 20 | |
| 21 | func Do(a A, b B) map[I]I { |
| 22 | m := make(map[I]I) |
| 23 | m[a] = B{} |
| 24 | m[b] = b |
| 25 | return m |
| 26 | } |
| 27 | |
| 28 | func Baz(a A, b B) { |
| 29 | var x []I |
| 30 | for k, v := range Do(a, b) { |
| 31 | k.Foo() |
| 32 | v.Foo() |
| 33 | |
| 34 | x = append(x, k) |
| 35 | } |
| 36 | |
| 37 | x[len(x)-1].Foo() |
| 38 | } |
| 39 | |
| 40 | // Relevant SSA: |
| 41 | // func Baz(a A, b B): |
| 42 | // ... |
| 43 | // t4 = Do(t2, t3) |
| 44 | // t5 = range t4 |
| 45 | // jump 1 |
| 46 | // 1: |
| 47 | // t6 = phi [0: nil:[]I, 2: t16] #x |
| 48 | // t7 = next t5 |
| 49 | // t8 = extract t7 #0 |
| 50 | // if t8 goto 2 else 3 |
| 51 | // 2: |
| 52 | // t9 = extract t7 #1 |
| 53 | // t10 = extract t7 #2 |
| 54 | // t11 = invoke t9.Foo() |
| 55 | // t12 = invoke t10.Foo() |
| 56 | // ... |
| 57 | // jump 1 |
| 58 | // 3: |
| 59 | // t17 = len(t6) |
| 60 | // t18 = t17 - 1:int |
| 61 | // t19 = &t6[t18] |
| 62 | // t20 = *t19 |
| 63 | // t21 = invoke t20.Foo() |
| 64 | // return |
| 65 | |
| 66 | // WANT: |
| 67 | // Baz: Do(t2, t3) -> Do; invoke t10.Foo() -> B.Foo; invoke t20.Foo() -> A.Foo, B.Foo; invoke t9.Foo() -> A.Foo, B.Foo |
| 68 |
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