mirror of
https://github.com/jlengrand/kotlin.git
synced 2026-05-09 00:21:47 +00:00
fb6eafddf1
Simplify ifs when branches have condition true/false.
Simplify blocks containing only a variable declaration
and a variable get of the same variable. Simplify to
just the condition.
Do not introduce temporary variables for constants for
null checks. Constants have no side-effects and can be
reloaded freely instead of going through a local.
This simplifies code such as "42.toLong()!!" so that the
resulting code has no branches and uses no locals. The
simplifications happen as follows:
```
block
temp = 42.toLong()
when
(temp == null) throw NPE
(true) load temp
---> null test simplification
block
temp = 42.toLong()
when
(false) throw NPE
(true) load temp
---> when simplification
block
temp = 42.toLong()
load temp
---> block simplification
42.toLong()
```
10 lines
97 B
Kotlin
Vendored
10 lines
97 B
Kotlin
Vendored
fun box(): String {
|
|
42!!
|
|
42.toLong()!!
|
|
return "OK"!!
|
|
}
|
|
|
|
// 0 LOAD
|
|
// 0 STORE
|
|
// 0 IF
|