JVM_IR generate range-based loop closer to Java counter loop

KT-48435 KT-48507

compiler/testData/codegen/bytecodeText/forLoop/unsigned/stepThenDifferentStep.kt

@@ -1,5 +1,15 @@
 // TARGET_BACKEND: JVM_IR
 // WITH_RUNTIME
+
+// 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 1u..7u step 3 step 2) {
     }
@@ -11,23 +21,6 @@ fun box(): String {
 // nested call to "step".
 // 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.
-//
-// Expected lowered form of loop:
-//
-//   // Additional statements:
-//   val outerNestedLast = getProgressionLastElement(1u, 7u, 3)
-//
-//   // Standard form of loop over progression
-//   var inductionVar = 1u
-//   val last = getProgressionLastElement(1u, outerNestedLast, 2)
-//   if (inductionVar <= last) {
-//     // Loop is not empty
-//     do {
-//       val i = inductionVar
-//       inductionVar += 2
-//       // Loop body
-//     } while (i != last)
-//   }
 
 // 0 iterator
 // 0 getStart
@@ -40,7 +33,12 @@ fun box(): String {
 // 0 ATHROW
 // 1 INVOKESTATIC kotlin/UnsignedKt.uintCompare
 // 1 IFGT
-// 1 IF_ICMPNE
+// 1 IF_ICMPEQ
 // 2 IF
 // 0 INVOKESTATIC kotlin/UInt.constructor-impl
 // 0 INVOKE\w+ kotlin/UInt.(un)?box-impl
+// 6 ILOAD
+// 4 ISTORE
+// 0 IADD
+// 0 ISUB
+// 1 IINC