mirror of
https://github.com/golang/go
synced 2024-11-24 20:20:03 -07:00
e197f467d5
* Decreases the generated code slightly. * Similar to phiopt pass from gcc, except it only handles booleans. Handling Eq/Neq had no impact on the generated code. name old time/op new time/op delta Template 453ms ± 4% 451ms ± 4% ~ (p=0.468 n=24+24) GoTypes 1.55s ± 1% 1.55s ± 2% ~ (p=0.287 n=24+25) Compiler 6.53s ± 2% 6.56s ± 1% +0.46% (p=0.050 n=23+23) MakeBash 45.8s ± 2% 45.7s ± 2% ~ (p=0.866 n=24+25) name old text-bytes new text-bytes delta HelloSize 676k ± 0% 676k ± 0% ~ (all samples are equal) CmdGoSize 8.07M ± 0% 8.07M ± 0% -0.03% (p=0.000 n=25+25) Change-Id: Ia62477b7554127958a14cb27f85849b095d63663 Reviewed-on: https://go-review.googlesource.com/20090 Reviewed-by: Keith Randall <khr@golang.org> Run-TryBot: Alexandru Moșoi <alexandru@mosoi.ro> TryBot-Result: Gobot Gobot <gobot@golang.org>
44 lines
574 B
Go
44 lines
574 B
Go
// +build amd64
|
|
// errorcheck -0 -d=ssa/phiopt/debug=3
|
|
|
|
package main
|
|
|
|
func f0(a bool) bool {
|
|
x := false
|
|
if a {
|
|
x = true
|
|
} else {
|
|
x = false
|
|
}
|
|
return x // ERROR "converted OpPhi to OpCopy$"
|
|
}
|
|
|
|
func f1(a bool) bool {
|
|
x := false
|
|
if a {
|
|
x = false
|
|
} else {
|
|
x = true
|
|
}
|
|
return x // ERROR "converted OpPhi to OpNot$"
|
|
}
|
|
|
|
func f2(a, b int) bool {
|
|
x := true
|
|
if a == b {
|
|
x = false
|
|
}
|
|
return x // ERROR "converted OpPhi to OpNot$"
|
|
}
|
|
|
|
func f3(a, b int) bool {
|
|
x := false
|
|
if a == b {
|
|
x = true
|
|
}
|
|
return x // ERROR "converted OpPhi to OpCopy$"
|
|
}
|
|
|
|
func main() {
|
|
}
|