mirror of
https://github.com/golang/go
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48 lines
826 B
Go
48 lines
826 B
Go
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// run
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//go: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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// wasm is excluded because the compiler chatter about register abi pragma ends up
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// on stdout, and causes the expected output to not match.
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package main
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import "fmt"
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type i4 struct {
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a, b, c, d int
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}
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//go:noinline
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func spills(px *i4) {
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}
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//go:registerparams
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//go:noinline
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func F(x i4) i4 {
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ab := x.a + x.b
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bc := x.b + x.c
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cd := x.c + x.d
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ad := x.a + x.d
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ba := x.a - x.b
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cb := x.b - x.c
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dc := x.c - x.d
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da := x.a - x.d
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i := i4{ab*bc + da, cd*ad + cb, ba*cb + ad, dc*da + bc}
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spills(&i)
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return i
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}
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func main() {
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x := i4{1, 2, 3, 4}
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y := x
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z := F(x)
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if z != (i4{12, 34, 6, 8}) {
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fmt.Printf("y=%v, z=%v\n", y, z)
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}
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}
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