Mark Punzalan
b1ce21bc55
"checked step" (check for a positive step arg) and "negated step" (negate the step arg when the nested step is negative).
45 lines
1.2 KiB
Kotlin
Vendored
45 lines
1.2 KiB
Kotlin
Vendored
// TARGET_BACKEND: JVM_IR
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// WITH_RUNTIME
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fun box(): String {
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for (i in (1u..8u).reversed() step 2) {
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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. However, when the
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// step is constant and > 0, this check does not need to be added.
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//
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// Expected lowered form of loop:
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//
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// // Standard form of loop over progression
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// val last = getProgressionLastElement(8u, 1u, -2)
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// var inductionVar = 8u
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// if (last <= inductionVar) {
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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 += -2
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// // Loop body
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// } while (i != last)
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// }
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//
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// We can't use "0 reversed" in the regex below because "reversed" is in the test filename.
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// 0 INVOKE.*reversed
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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/UProgressionUtilKt.getProgressionLastElement
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// 0 NEW java/lang/IllegalArgumentException
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// 0 ATHROW
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// 1 IFGT
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// 1 IF_ICMPNE
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// 2 IF
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// 0 INVOKESTATIC kotlin/UInt.constructor-impl
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// 0 INVOKE\w+ kotlin/UInt.(un)?box-impl
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