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go/test/fixedbugs/issue49282.go
hanpro 4f083c7dcf cmd/compile: avoid adding LECall to the entry block when has opendefers
The openDeferRecord always insert vardef/varlive pairs into the entry block, it may destroy the mem chain when LECall's args are writing into the same block. So create a new block before that happens.

Fixes #49282

Change-Id: Ibda6c4a45d960dd412a641f5e02276f663c80785
Reviewed-on: https://go-review.googlesource.com/c/go/+/361410
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Trust: Than McIntosh <thanm@google.com>
Reviewed-by: David Chase <drchase@google.com>
2021-11-06 13:10:06 +00:00

45 lines
639 B
Go

// compile
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package p
//go:noinline
func g(d uintptr, a, m []int, s struct {
a, b, c, d, e int
}, u uint) {
_ = a
_ = m
_ = s
func() {
for i := 0; i < 5; i++ {
_ = a
_ = m
_, _ = s, s
}
}()
}
var One float64 = 1.0
func f(d uintptr) {
var a, m []int
var s struct {
a, b, c, d, e int
}
g(d, a, m, s, uint(One)) // Uint of not-a-constant inserts a conditional, necessary to bug
defer func() uint {
return 0
}()
}
var d uintptr
func h() {
f(d)
}