// TARGET_BACKEND: JVM_IR // IMPORTANT! // Please, when your changes cause failures in bytecodeText tests for 'for' loops, // examine the resulting bytecode shape carefully. // Range and progression-based loops generated with Kotlin compiler should be // as close as possible to Java counter loops ('for (int i = a; i < b; ++i) { ... }'). // Otherwise it may result in performance regression due to missing HotSpot optimizations. // Run Kotlin compiler benchmarks (https://github.com/Kotlin/kotlin-benchmarks) // with compiler built from your changes if you are not sure. 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. // 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 // JVM_IR_TEMPLATES // 3 ILOAD // 2 ISTORE // 0 IADD // 0 ISUB // 1 IINC