go result_regalloc 源码
golang result_regalloc 代码
文件路径：/test/abi/result_regalloc.go
// run
// 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.
// Bug: in (*bb).d, the value to be returned was not allocated to
// a register that satisfies its register mask.
package main
type bb struct {
r float64
x []float64
}
//go:noinline
func B(r float64, x []float64) I {
return bb{r, x}
}
func (b bb) d() (int, int) {
if b.r == 0 {
return 0, len(b.x)
}
return len(b.x), len(b.x)
}
type I interface { d() (int, int) }
func D(r I) (int, int) { return r.d() }
//go:noinline
func F() (int, int) {
r := float64(1)
x := []float64{0, 1, 2}
b := B(r, x)
return D(b)
}
func main() {
x, y := F()
if x != 3 || y != 3 {
panic("FAIL")
}
}
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