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cmd/compile: add shift optimization test

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For #69635

Change-Id: Id5696dc9724c3b3afcd7b60a6994f98c5309eb0e
Reviewed-on: https://go-review.googlesource.com/c/go/+/621755
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
This commit is contained in:
Youlin Feng 2024-10-22 12:57:13 +08:00 committed by Gopher Robot
parent dd4fee7ec6
commit bb07aa644b
1 changed files with 13 additions and 0 deletions
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13
test/codegen/issue69635.go Normal file
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@ -0,0 +1,13 @@
// asmcheck
// Copyright 2024 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.
package codegen
func calc(a uint64) uint64 {
v := a >> 20 & 0x7f
// amd64: `SHRQ\s\$17, AX$`, `ANDL\s\$1016, AX$`
return v << 3
}