mirror of
https://github.com/golang/go
synced 2024-11-06 05:36:13 -07:00
1b15c7f102
If -d=ssa/PASS/debug=N is specified (N >= 2) for a rewrite pass (e.g. lower), when a Value (or Block) is rewritten, print the Value (or Block) before and after. For #31915. Updates #19013. Change-Id: I80eadd44302ae736bc7daed0ef68529ab7a16776 Reviewed-on: https://go-review.googlesource.com/c/go/+/176718 Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
40 lines
599 B
Go
40 lines
599 B
Go
// errorcheck -0 -d=ssa/opt/debug=1
|
|
|
|
package main
|
|
|
|
// Trivial interface call devirtualization test.
|
|
|
|
type real struct {
|
|
value int
|
|
}
|
|
|
|
func (r *real) Value() int { return r.value }
|
|
|
|
type Valuer interface {
|
|
Value() int
|
|
}
|
|
|
|
type indirectiface struct {
|
|
a, b, c int
|
|
}
|
|
|
|
func (i indirectiface) Value() int {
|
|
return i.a + i.b + i.c
|
|
}
|
|
|
|
func main() {
|
|
var r Valuer
|
|
rptr := &real{value: 3}
|
|
r = rptr
|
|
|
|
if r.Value() != 3 { // ERROR "de-virtualizing call$"
|
|
panic("not 3")
|
|
}
|
|
|
|
// Can't do types that aren't "direct" interfaces (yet).
|
|
r = indirectiface{3, 4, 5}
|
|
if r.Value() != 12 {
|
|
panic("not 12")
|
|
}
|
|
}
|