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When a closure is inlined, it may contain other hidden closures, which the inliner will duplicate, rendering the original nested closures as unreachable. Because they are unreachable, they don't get processed in escape analysis, meaning that go/defer statements don't get rewritten, which can then in turn trigger errors in walk. This patch looks for nested hidden closures and marks them as dead, so that they can be skipped later on in the compilation flow. NB: if during escape analysis we rediscover a hidden closure (due to an explicit reference) that was previously marked dead, revive it at that point. Fixes #59404. Change-Id: I76db1e9cf1ee38bd1147aeae823f916dbbbf081b Reviewed-on: https://go-review.googlesource.com/c/go/+/482355 TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Than McIntosh <thanm@google.com> Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
25 lines
432 B
Go
25 lines
432 B
Go
// run
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// Copyright 2023 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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var G func(int) int
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//go:noinline
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func callclo(q, r int) int {
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p := func(z int) int {
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G = func(int) int { return 1 }
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return z + 1
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}
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res := p(q) ^ p(r) // These calls to "p" will be inlined
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G = p
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return res
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}
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func main() {
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callclo(1, 2)
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}
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