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https://github.com/golang/go
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e97ab0a0ac
The reg[] array in .../gc is where truth lies. The copy in .../ARCH is incorrect as it is mostly not updated to reflect regalloc decisions. This bug was introduced in the rewrite https://go-review.googlesource.com/#/c/7853/. The new reg[] array was introduced in .../gc but not all of the uses were removed in the .../ARCH directories. Fixes #12133 Change-Id: I6364fc403cdab92d802d17f2913ba1607734037c Reviewed-on: https://go-review.googlesource.com/13630 Reviewed-by: Russ Cox <rsc@golang.org>
27 lines
541 B
Go
27 lines
541 B
Go
// run
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// Copyright 2015 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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// Issue 12133. The CX register was getting clobbered
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// because we did not keep track of its allocation correctly.
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package main
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import "fmt"
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func main() {
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want := uint(48)
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got := f1(48)
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if got != want {
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fmt.Println("got", got, ", wanted", want)
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panic("bad")
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}
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}
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func f1(v1 uint) uint {
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switch {
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} // prevent inlining
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return v1 >> ((1 >> v1) + (1 >> v1))
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}
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