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go/test/fixedbugs/issue45344.go
Cherry Zhang 5579ee169f cmd/compile: in expand calls, preserve pointer store type but decompose aggregate args
In CL 305672 we preserve the pointer type of a store by just not
decomposing it. But this can be problematic when the source of
the store is a direct interface aggregate type (e.g.
struct { x map[int]int }.

In this CL we take a different approach: we preserve the store
type when generating the new store, but also decompose the source.

Fixes #45344.

Change-Id: If5dd496458dee95aa649c6d106b96a6cdcf3e60d
Reviewed-on: https://go-review.googlesource.com/c/go/+/306669
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
2021-04-02 00:45:56 +00:00

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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.
// Issue 45344: expand_calls does not handle direct interface
// typed argument well.
package p
type T struct {
a map[int]int
}
func F(t T) {
G(t)
}
func G(...interface{})