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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
264 B
Kotlin
Vendored
10 lines
264 B
Kotlin
Vendored
fun test(a: Any?, b: Any?, c: Any?) {
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when (null) {
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a -> throw IllegalArgumentException("a is null")
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b -> throw IllegalArgumentException("b is null")
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c -> throw IllegalArgumentException("c is null")
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}
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}
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// 0 areEqual
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// 3 IFNONNULL |