Dmitry Petrov
43 lines
1.4 KiB
Kotlin
Vendored
43 lines
1.4 KiB
Kotlin
Vendored
// TARGET_BACKEND: JVM_IR
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// IMPORTANT!
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// Please, when your changes cause failures in bytecodeText tests for 'for' loops,
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// examine the resulting bytecode shape carefully.
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// Range and progression-based loops generated with Kotlin compiler should be
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// as close as possible to Java counter loops ('for (int i = a; i < b; ++i) { ... }').
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// Otherwise it may result in performance regression due to missing HotSpot optimizations.
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// Run Kotlin compiler benchmarks (https://github.com/Kotlin/kotlin-benchmarks)
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// with compiler built from your changes if you are not sure.
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fun box(): String {
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val intRange = 1..7
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for (i in intRange 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 "step" is called on a non-literal progression, there is a check to see if that progression's step value is < 0.
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// However, if the progression is of type *Range (e.g., IntRange) instead of *Progression (e.g., IntProgression), this
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// check is not needed since *Range always has step == 1.
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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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// 1 getFirst
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// 1 getLast
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// 0 getStep
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// 1 INVOKESTATIC kotlin/internal/ProgressionUtilKt.getProgressionLastElement
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// 0 NEW java/lang/IllegalArgumentException
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// 0 ATHROW
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// 1 IF_ICMPGT
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// 1 IF_ICMPEQ
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// 2 IF
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// 0 INEG
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// 7 ILOAD
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// 4 ISTORE
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// 0 IADD
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// 0 ISUB
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// 1 IINC |