| 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 | func Do(i I) { i.Foo() } |
| 14 | |
| 15 | func Baz(b bool, h func(I)) { |
| 16 | var i I |
| 17 | a := func(g func(I)) { |
| 18 | g(i) |
| 19 | } |
| 20 | |
| 21 | if b { |
| 22 | h = Do |
| 23 | } |
| 24 | |
| 25 | a(h) |
| 26 | } |
| 27 | |
| 28 | // Relevant SSA: |
| 29 | // func Baz(b bool, h func(I)): |
| 30 | // t0 = new I (i) |
| 31 | // t1 = make closure Baz$1 [t0] |
| 32 | // if b goto 1 else 2 |
| 33 | // 1: |
| 34 | // jump 2 |
| 35 | // 2: |
| 36 | // t2 = phi [0: h, 1: Do] #h |
| 37 | // t3 = t1(t2) |
| 38 | // return |
| 39 | // |
| 40 | // func Baz$1(g func(I)): |
| 41 | // t0 = *i |
| 42 | // t1 = g(t0) |
| 43 | // return |
| 44 | |
| 45 | // In the edge set Local(i) -> Local(t0), Local(t0) below, |
| 46 | // two occurrences of t0 come from t0 in Baz and Baz$1. |
| 47 | |
| 48 | // WANT: |
| 49 | // Function(Do) -> Local(t2) |
| 50 | // Function(Baz$1) -> Local(t1) |
| 51 | // Local(h) -> Local(t2) |
| 52 | // Local(t0) -> Local(i) |
| 53 | // Local(i) -> Local(t0), Local(t0) |
| 54 |