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https://github.com/golang/go
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c015f76acb
Added a test that exercises named results Change-Id: Ie228b68f4f846266595a95e0f65a6e4b8bf79635 Reviewed-on: https://go-review.googlesource.com/c/go/+/297029 Trust: David Chase <drchase@google.com> Run-TryBot: David Chase <drchase@google.com> Reviewed-by: Cherry Zhang <cherryyz@google.com>
92 lines
1.4 KiB
Go
92 lines
1.4 KiB
Go
// run
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//go:build !wasm
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// +build !wasm
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// Copyright 2021 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"fmt"
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)
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var sink *string
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var y int
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//go:registerparams
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//go:noinline
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func F(a, b, c *int) (x int) {
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x = *a
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G(&x)
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x += *b
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G(&x)
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x += *c
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G(&x)
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return
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}
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//go:registerparams
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//go:noinline
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func G(x *int) {
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y += *x
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fmt.Println("y = ", y)
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}
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//go:registerparams
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//go:noinline
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func X() {
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*sink += " !!!!!!!!!!!!!!!"
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}
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//go:registerparams
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//go:noinline
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func H(s, t string) (result string) { // result leaks to heap
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result = "Aloha! " + s + " " + t
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sink = &result
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r := ""
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if len(s) <= len(t) {
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r = "OKAY! "
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X()
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}
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return r + result
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}
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//go:registerparams
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//go:noinline
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func K(s, t string) (result string) { // result spills
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result = "Aloha! " + s + " " + t
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r := ""
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if len(s) <= len(t) {
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r = "OKAY! "
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X()
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}
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return r + result
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}
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func main() {
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a, b, c := 1, 4, 16
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x := F(&a, &b, &c)
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fmt.Printf("x = %d\n", x)
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y := H("Hello", "World!")
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fmt.Println("len(y) =", len(y))
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fmt.Println("y =", y)
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z := H("Hello", "Pal!")
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fmt.Println("len(z) =", len(z))
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fmt.Println("z =", z)
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fmt.Println()
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y = K("Hello", "World!")
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fmt.Println("len(y) =", len(y))
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fmt.Println("y =", y)
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z = K("Hello", "Pal!")
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fmt.Println("len(z) =", len(z))
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fmt.Println("z =", z)
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}
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