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3b2f67a597
It doesn't have to. The type in the aux field is authoritative.
There are cases involving casting from interface{} where pointers
have a placeholder pointer type (because the type is not known when
the IData op is generated).
The check was introduced in CL 13447.
Fixes #39459
Change-Id: Id77a57577806a271aeebd20bea5d92d08ee7aa6b
Reviewed-on: https://go-review.googlesource.com/c/go/+/239817
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
23 lines
583 B
Go
23 lines
583 B
Go
// compile
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// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package p
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type T struct { // big enough to be an unSSAable type
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a, b, c, d, e, f int
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}
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func f(x interface{}, p *int) {
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_ = *p // trigger nil check here, removing it from below
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switch x := x.(type) {
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case *T:
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// Zero twice, so one of them will be removed by the deadstore pass
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*x = T{}
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*p = 0 // store op to prevent Zero ops from being optimized by the earlier opt pass rewrite rules
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*x = T{}
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}
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}
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