kotlin/compiler/testData/codegen/bytecodeText/nullCheckOptimization/kt12839.kt at 8103f0ba60bc51a8f785fc0bb4889121eb302da7 - kotlin - Gitea: Git with a cup of tea

jlengrand/kotlin

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Mads Ager 690b8e0ac9 JVM_IR: Optimize null checks.

Introduce lowering to remove null checks for primitive type
expressions and replace them with true/false. Side-effects
are preserved.

Generate ifnull/ifnonnull instructions for null checks instead
of materializing a null literal for an equality check.

2019-01-19 09:43:43 +01:00

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Kotlin

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 fun test() {
     val value = System.getProperty("key")
     if (value != null) {
         value.toUpperCase()
     }
 }
 // 1 IFNULL
 // 0 IFNONNULL