Dmitry Petrov
40 lines
1.2 KiB
Kotlin
Vendored
40 lines
1.2 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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for (i in 1..4 step 1 step 1) {
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}
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return "OK"
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}
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// For "step" progressions in JVM IR, when the step is constant and == 1, and "step" is called on a literal progression which we already
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// know to have a step whose absolute value is 1, we can essentially ignore the "step" call.
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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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// 0 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_ICMPLE
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// 1 IF
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// JVM_IR_TEMPLATES
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// 2 ILOAD
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// 2 ISTORE
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// 0 IADD
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// 0 ISUB
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// 1 IINC |