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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
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// errorcheck -0 -d=ssa/phiopt/debug=3
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package main
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func f0(a bool) bool {
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x := false
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if a {
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x = true
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} else {
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x = false
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}
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return x // ERROR "converted OpPhi to OpCopy$"
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}
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func f1(a bool) bool {
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x := false
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if a {
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x = false
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} else {
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x = true
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}
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return x // ERROR "converted OpPhi to OpNot$"
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}
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func f2(a, b int) bool {
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x := true
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if a == b {
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x = false
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}
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return x // ERROR "converted OpPhi to OpNot$"
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}
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func f3(a, b int) bool {
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x := false
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if a == b {
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x = true
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}
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return x // ERROR "converted OpPhi to OpCopy$"
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}
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func main() {
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}
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