go/test/fixedbugs/issue41736.go
David Chase f8d80977b7 cmd/compile: correct leaf type when "selecting" singleton register-sized struct
Two part fix:
1) bring the type "correction" forward from a later CL in the expand calls series
2) when a leaf-selwect is rewritten in place, update the type (it might have been
   changed by the type correction in 1).

Fixes #41736.

Change-Id: Id097efd10481bf0ad92aaead81a7207221c144b5
Reviewed-on: https://go-review.googlesource.com/c/go/+/259203
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-10-06 15:37:42 +00:00

106 lines
1.3 KiB
Go

// compile
// Copyright 2020 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
type I struct {
x int64
}
type F struct {
x float64
}
type C struct {
x *complex128
}
type D struct {
x complex64
}
type A [1]*complex128
//go:noinline
func (i I) X() C {
cx := complex(0, float64(i.x))
return C{&cx}
}
//go:noinline
func (f F) X() C {
cx := complex(f.x, 0)
return C{&cx}
}
//go:noinline
func (c C) X() C {
cx := complex(imag(*c.x), real(*c.x))
return C{&cx}
}
//go:noinline
func (d D) X() C {
cx := complex(float64(imag(d.x)), -float64(real(d.x)))
return C{&cx}
}
//go:noinline
func (a A) X() C {
cx := complex(-float64(imag(*a[0])), float64(real(*a[0])))
return C{&cx}
}
//go:noinline
func (i I) id() I {
return i
}
//go:noinline
func (f F) id() F {
return f
}
//go:noinline
func (c C) id() C {
return c
}
//go:noinline
func (d D) id() D {
return d
}
//go:noinline
func (a A) id() A {
return a
}
type T interface {
X() C
}
func G(x []T) []T {
var y []T
for _, a := range x {
var v T
switch u := a.(type) {
case I:
v = u.id()
case F:
v = u.id()
case C:
v = u.id()
case D:
v = u.id()
case A:
v = u.id()
}
y = append(y, v)
}
return y
}