go issue38356 源码
golang issue38356 代码
文件路径：/test/fixedbugs/issue38356.go
// compile
// Copyright 2020 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.
// Make sure floating point operations that generate flags
// are scheduled correctly on s390x.
package p
func f1(x, y float64, z int) float64 {
a := x + y // generate flags
if z == 0 { // create basic block that does not clobber flags
return a
}
if a > 0 { // use flags in different basic block
return y
}
return x
}
func f2(x, y float64, z int) float64 {
a := x - y // generate flags
if z == 0 { // create basic block that does not clobber flags
return a
}
if a > 0 { // use flags in different basic block
return y
}
return x
}
func f3(x, y float32, z int) float32 {
a := x + y // generate flags
if z == 0 { // create basic block that does not clobber flags
return a
}
if a > 0 { // use flags in different basic block
return y
}
return x
}
func f4(x, y float32, z int) float32 {
a := x - y // generate flags
if z == 0 { // create basic block that does not clobber flags
return a
}
if a > 0 { // use flags in different basic block
return y
}
return x
}
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