| 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 B struct { |
| 14 | p int |
| 15 | } |
| 16 | |
| 17 | func (b B) Foo() {} |
| 18 | |
| 19 | func Baz(i, j *I, b, c bool) { |
| 20 | if b { |
| 21 | i = j |
| 22 | } |
| 23 | *i = B{9} |
| 24 | if c { |
| 25 | (*i).Foo() |
| 26 | } else { |
| 27 | (*j).Foo() |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | // Relevant SSA: |
| 32 | // func Baz(i *I, j *I, b bool, c bool): |
| 33 | // if b goto 1 else 2 |
| 34 | // 1: |
| 35 | // jump 2 |
| 36 | // 2: |
| 37 | // t0 = phi [0: i, 1: j] #i |
| 38 | // t1 = local B (complit) |
| 39 | // t2 = &t1.p [#0] |
| 40 | // *t2 = 9:int |
| 41 | // t3 = *t1 |
| 42 | // t4 = make I <- B (t3) |
| 43 | // *t0 = t4 |
| 44 | // if c goto 3 else 5 |
| 45 | // 3: |
| 46 | // t5 = *t0 |
| 47 | // t6 = invoke t5.Foo() |
| 48 | // jump 4 |
| 49 | // 4: |
| 50 | // return |
| 51 | // 5: |
| 52 | // t7 = *j |
| 53 | // t8 = invoke t7.Foo() |
| 54 | // jump 4 |
| 55 | |
| 56 | // Flow chain showing that B reaches (*i).foo(): |
| 57 | // t3 (B) -> t4 -> t0 -> t5 |
| 58 | // Flow chain showing that B reaches (*j).foo(): |
| 59 | // t3 (B) -> t4 -> t0 <--> j -> t7 |
| 60 | |
| 61 | // WANT: |
| 62 | // Local(t0) -> Local(i), Local(j), Local(t5) |
| 63 | // Local(i) -> Local(t0) |
| 64 | // Local(j) -> Local(t0), Local(t7) |
| 65 | // Local(t3) -> Local(t4) |
| 66 | // Local(t4) -> Local(t0) |
| 67 |
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