go/test/fixedbugs/issue26097.go
Ilya Tocar b71ea0b7dd cmd/compile: mark CMOVLEQF, CMOVWEQF as cloberring AX
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>
2018-06-28 18:39:56 +00:00

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")
}
}