Files
kotlin/compiler/testData/codegen/bytecodeText/forLoop/stepped/stepThenReversed.kt
2019-10-28 15:26:38 +01:00

40 lines
1.1 KiB
Kotlin
Vendored

// TARGET_BACKEND: JVM_IR
fun box(): String {
for (i in (1..8 step 2).reversed()) {
}
return "OK"
}
// For "step" progressions in JVM IR, a call to getProgressionLastElement() is made to compute the "last" value.
// If the step is non-constant, there is a check that it is > 0, and if not, an IllegalArgumentException is thrown. However, when the
// step is constant and > 0, this check does not need to be added.
//
// Expected lowered form of loop:
//
// // Standard form of loop over progression
// val last = 1
// var inductionVar = getProgressionLastElement(1, 8, 2)
// val step = -2
// if (last <= inductionVar) {
// // Loop is not empty
// do {
// val i = inductionVar
// inductionVar += step
// // Loop body
// } while (last <= inductionVar)
// }
// 0 reversed
// 0 iterator
// 0 getStart
// 0 getEnd
// 0 getFirst
// 0 getLast
// 0 getStep
// 1 INVOKESTATIC kotlin/internal/ProgressionUtilKt.getProgressionLastElement
// 0 NEW java/lang/IllegalArgumentException
// 0 ATHROW
// 1 IF_ICMPGT
// 1 IF_ICMPLE
// 2 IF