Mark Punzalan
b1ce21bc55
"checked step" (check for a positive step arg) and "negated step" (negate the step arg when the nested step is negative).
44 lines
1.1 KiB
Kotlin
Vendored
44 lines
1.1 KiB
Kotlin
Vendored
// TARGET_BACKEND: JVM_IR
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fun one() = 1
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fun box(): String {
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for (i in 1..7 step one()) {
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}
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return "OK"
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}
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// For "step" progressions in JVM IR, a call to getProgressionLastElement() is made to compute the "last" value.
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// If the step is non-constant, there is a check that it is > 0, and if not, an IllegalArgumentException is thrown.
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//
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// Expected lowered form of loop:
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//
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// // Additional statements:
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// var stepArg = one()
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// if (stepArg <= 0) throw IllegalArgumentException("Step must be positive, was: $stepArg.")
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//
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// // Standard form of loop over progression
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// var inductionVar = 1
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// val last = getProgressionLastElement(1, 7, stepArg)
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// if (inductionVar <= last) {
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// // Loop is not empty
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// do {
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// val i = inductionVar
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// inductionVar += stepArg
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// // Loop body
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// } while (i != last)
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// }
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// 0 iterator
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// 0 getStart
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// 0 getEnd
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// 0 getFirst
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// 0 getLast
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// 0 getStep
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// 1 INVOKESTATIC kotlin/internal/ProgressionUtilKt.getProgressionLastElement
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// 1 NEW java/lang/IllegalArgumentException
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// 1 ATHROW
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// 1 IF_ICMPGT
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// 1 IF_ICMPNE
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// 1 IFGT
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// 3 IF |