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db9341a024
When we deadcode-remove a block which is a write barrier test, remove that block from the list of write barrier test blocks. Fixes #25516 Change-Id: I1efe732d5476003eab4ad6bf67d0340d7874ff0c Reviewed-on: https://go-review.googlesource.com/115037 Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
27 lines
558 B
Go
27 lines
558 B
Go
// compile
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// Copyright 2018 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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// Make sure dead write barriers are handled correctly.
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package main
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func f(p **int) {
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// The trick here is to eliminate the block containing the write barrier,
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// but only after the write barrier branches are inserted.
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// This requires some delicate code.
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i := 0
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var b []bool
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var s string
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for true {
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if b[i] {
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var a []string
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s = a[len(s)]
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i = 0
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}
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*p = nil
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}
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}
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