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566e3e074c
This triggers three times while building std, once in image/png and twice in go/internal/gccgoimporter. There are no instances in std in which a more aggressive optimization would have triggered. This doesn't necessarily avoid an allocation, because escape analysis is already able in many cases to use a temporary backing for the string, but it does at a minimum avoid the runtime call and copy. Fixes #24937 Change-Id: I7019e85638ba8cd7e2f03890e672558b858579bc Reviewed-on: https://go-review.googlesource.com/108035 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
16 lines
305 B
Go
16 lines
305 B
Go
// run
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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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package main
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func main() {
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x := []byte{'a'}
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switch string(x) {
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case func() string { x[0] = 'b'; return "b" }():
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panic("FAIL")
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}
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}
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