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https://github.com/golang/go
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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
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package main
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// Trivial interface call devirtualization test.
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type real struct {
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value int
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}
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func (r *real) Value() int { return r.value }
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type Valuer interface {
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Value() int
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}
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type indirectiface struct {
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a, b, c int
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}
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func (i indirectiface) Value() int {
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return i.a + i.b + i.c
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}
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func main() {
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var r Valuer
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rptr := &real{value: 3}
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r = rptr
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if r.Value() != 3 { // ERROR "de-virtualizing call$"
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panic("not 3")
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}
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// Can't do types that aren't "direct" interfaces (yet).
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r = indirectiface{3, 4, 5}
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if r.Value() != 12 {
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panic("not 12")
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}
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}
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