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The defer wrapping feature added to the compiler's "order" phase creates temporaries into which it copies defer arguments. If one of these temps is large enough that we place it into the defer closure by address (as opposed to by value), then the temp in question can't be reused later on in the order phase, nor do we want a VARKILL annotation for it at the end of the current block scope. Test written by Cherry. Updates #40724. Change-Id: Iec7efd87ec5a3e3d7de41cdcc7f39c093ed1e815 Reviewed-on: https://go-review.googlesource.com/c/go/+/312869 Trust: Than McIntosh <thanm@google.com> Run-TryBot: Than McIntosh <thanm@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
38 lines
469 B
Go
38 lines
469 B
Go
// run
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//go:build !wasm
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// +build !wasm
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// Copyright 2021 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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//go:noinline
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func F() {
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b := g()
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defer g2(b)
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n := g()[20]
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println(n)
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}
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type T [45]int
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var x = 0
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//go:noinline
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func g() T {
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x++
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return T{20: x}
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}
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//go:noinline
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func g2(t T) {
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if t[20] != 1 {
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println("FAIL", t[20])
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}
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}
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func main() { F() }
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