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| author | Matthew Dempsky <mdempsky@google.com> | 2021-02-17 17:49:40 -0800 |
|---|---|---|
| committer | Dmitri Shuralyov <dmitshur@golang.org> | 2021-03-01 18:01:46 +0000 |
| commit | ddeae6b248e5130fe634047c3ca5964f5fa4e3dd (patch) | |
| tree | b083127b5ce2e163386a1aa669d2d411baa26e42 /test | |
| parent | b7e0eb49d8bb76ea0d98db53beef7209d9bd96d9 (diff) | |
| download | go-ddeae6b248e5130fe634047c3ca5964f5fa4e3dd.tar.gz go-ddeae6b248e5130fe634047c3ca5964f5fa4e3dd.zip | |
[release-branch.go1.16] cmd/compile: declare inlined result params early for empty returns
The code for delayed declaration of inlined result parameters only
handles non-empty return statements. This is generally okay, because
we already early declare if there are any (non-blank) named result
parameters.
But if a user writes a function with only blank result parameters and
with exactly one return statement, which is empty, then they could end
up hitting the dreaded "Value live at entry" ICE.
This CL fixes the issue by ensuring we always early declare inlined
result parameters if there are any empty return statements.
Fixes #44358.
Change-Id: I315f3853be436452883b1ce31da1bdffdf24d506
Reviewed-on: https://go-review.googlesource.com/c/go/+/293293
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/296569
Diffstat (limited to 'test')
| -rw-r--r-- | test/fixedbugs/issue44355.dir/a.go | 7 | ||||
| -rw-r--r-- | test/fixedbugs/issue44355.dir/b.go | 9 | ||||
| -rw-r--r-- | test/fixedbugs/issue44355.go | 7 |
3 files changed, 23 insertions, 0 deletions
diff --git a/test/fixedbugs/issue44355.dir/a.go b/test/fixedbugs/issue44355.dir/a.go new file mode 100644 index 0000000000..0f63c6fd98 --- /dev/null +++ b/test/fixedbugs/issue44355.dir/a.go @@ -0,0 +1,7 @@ +// Copyright 2021 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. + +package a + +func F() (_ *int) { return nil } diff --git a/test/fixedbugs/issue44355.dir/b.go b/test/fixedbugs/issue44355.dir/b.go new file mode 100644 index 0000000000..09d5bde887 --- /dev/null +++ b/test/fixedbugs/issue44355.dir/b.go @@ -0,0 +1,9 @@ +// Copyright 2021 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. + +package b + +import "./a" + +var _ = a.F() diff --git a/test/fixedbugs/issue44355.go b/test/fixedbugs/issue44355.go new file mode 100644 index 0000000000..d406838588 --- /dev/null +++ b/test/fixedbugs/issue44355.go @@ -0,0 +1,7 @@ +// compiledir + +// Copyright 2021 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. + +package ignored |