mirror of
https://github.com/golang/go
synced 2024-11-26 20:31:25 -07:00
b71ea0b7dd
Code generation for OpAMD64CMOV[WLQ]EQF uses AX as a scratch register, but only CMOVQEQF, correctly lets compiler know. Mark other 2 as clobbering AX. Fixes #26097 Change-Id: I2a65bd67bf18a540898b4a0ae6c8766e0b767b19 Reviewed-on: https://go-review.googlesource.com/121336 Run-TryBot: Ilya Tocar <ilya.tocar@intel.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Heschi Kreinick <heschi@google.com> Reviewed-by: Giovanni Bajo <rasky@develer.com>
48 lines
829 B
Go
48 lines
829 B
Go
// run
|
|
|
|
// Copyright 2018 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 main
|
|
|
|
//go:noinline
|
|
func cmovClobberAX64(v1, v2 int64, x1, x2 float64) int64 {
|
|
r := v1
|
|
if x1 == x2 {
|
|
r = v2
|
|
}
|
|
return r
|
|
}
|
|
|
|
//go:noinline
|
|
func cmovClobberAX32(v1, v2 int32, x1, x2 float64) int32 {
|
|
r := v1
|
|
if x1 == x2 {
|
|
r = v2
|
|
}
|
|
return r
|
|
}
|
|
|
|
//go:noinline
|
|
func cmovClobberAX16(v1, v2 int16, x1, x2 float64) int16 {
|
|
r := v1
|
|
if x1 == x2 {
|
|
r = v2
|
|
}
|
|
return r
|
|
}
|
|
|
|
func main() {
|
|
if cmovClobberAX16(1, 2, 4.0, 5.0) != 1 {
|
|
panic("CMOVQEQF causes incorrect code")
|
|
}
|
|
if cmovClobberAX32(1, 2, 4.0, 5.0) != 1 {
|
|
panic("CMOVQEQF causes incorrect code")
|
|
}
|
|
if cmovClobberAX64(1, 2, 4.0, 5.0) != 1 {
|
|
panic("CMOVQEQF causes incorrect code")
|
|
}
|
|
|
|
}
|