JVM_IR KT-34594 strip fake variable initialization during inlining

compiler/testData/codegen/bytecodeText/capturedVarsOptimization/sharedSlotsWithCapturedVars.kt

@@ -17,13 +17,13 @@ fun box(): String {
 }
 
 
-// Shared variable slots (x1, x2):
-// 4 ILOAD 6
-// 4 ISTORE 6
-
 // Temporary variable for 'x2++' + store to fake variable marking the outer `run`:
 // 2 ISTORE 1
 
 // 0 NEW
 // 0 GETFIELD
 // 0 PUTFIELD
+
+// No fake variables for @InlineOnly functions
+// 0 ILOAD 6
+// 0 ISTORE 6

compiler/testData/codegen/bytecodeText/coroutines/debug/localVariableCorrectLabel.kt

@@ -14,7 +14,7 @@ fun main(args: Array<String>) {
 @BuilderInference
 suspend fun SequenceScope<Int>.awaitSeq(): Int = 42
 
-// 1 LINENUMBER 9 L19
-// 1 LOCALVARIABLE a I L[0-9]+ L18
+// 1 LINENUMBER 9 L18
+// 1 LOCALVARIABLE a I L[0-9]+ L17
 
 // IGNORE_BACKEND_FIR: JVM_IR

compiler/testData/codegen/bytecodeText/forLoop/forInIterableWithIndex/forInEmptyListWithIndex.kt

@@ -16,5 +16,5 @@ fun box(): String {
 // 0 component1
 // 0 component2
 
-// The 1st ICONST_0 is for initializing the list. 2nd is for initializing the index in the lowered for-loop.
-// 2 ICONST_0
+// - Initializing the index in the lowered for-loop.
+// 1 ICONST_0

compiler/testData/codegen/bytecodeText/forLoop/forInSequenceWithIndex/forInEmptySequenceWithIndex.kt

@@ -16,5 +16,5 @@ fun box(): String {
 // 0 component1
 // 0 component2
 
-// The 1st ICONST_0 is for initializing the list. 2nd is for initializing the index in the lowered for-loop.
-// 2 ICONST_0
+// - Initializing the index in the lowered for-loop.
+// 1 ICONST_0

compiler/testData/codegen/bytecodeText/inline/inlineArgumentSlots.kt

@@ -49,4 +49,5 @@ class A {
 
 fun calcRequiredLayoutSize(count: Int, max: Int, toInt: Int) = 0
 
-// 3 ISTORE 10
+
+// 2 ISTORE 10

compiler/testData/codegen/bytecodeText/inline/noFakeVariableForInlineOnlyFun.kt

@@ -1,17 +1,23 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+
 @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
 @kotlin.internal.InlineOnly
-inline fun inlineOnlyFun() = 42
+inline fun inlineOnlyFun(): Int {
+    var unused = 0
+    var used1 = 0
+    var used2 = 0
+    ++used2
+    return 42 + used1
+}
 
 fun test() = inlineOnlyFun()
 
 // JVM_TEMPLATES
 // 1 LDC 0
-// 1 ICONST_0
-// 0 ISTORE 1
-// 2 ISTORE 0
+// 5 ICONST_0
+// 6 ISTORE
 
 // JVM_IR_TEMPLATES
 // 0 LDC 0
-// 0 ICONST_0
-// 0 ISTORE 1
-// 0 ISTORE 0
+// 5 ICONST_0
+// 5 ISTORE

compiler/testData/codegen/bytecodeText/inline/noFakeVariableForInlineOnlyFunFromStdlib.kt

@@ -0,0 +1,9 @@
+// WITH_RUNTIME
+
+import kotlin.math.sin
+
+fun test(x: Double) = sin(x)
+
+// 0 LDC 0
+// 0 ICONST_0
+// 0 ISTORE

compiler/testData/codegen/bytecodeText/inline/noFakeVariableForInlineOnlyFunMap.kt

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+fun test(xs: List<String>) =
+    xs.map { it.length }
+
+// $i$f$map, $i$f$mapTo, $i$a$-map-NoFakeVariableForInlineOnlyFunMapKt$test$1
+// 3 ICONST_0
+// 3 ISTORE

compiler/testData/codegen/bytecodeText/inline/noFakeVariableForInlineOnlyFunWithLambda.kt

@@ -0,0 +1,14 @@
+// WITH_RUNTIME
+
+fun test() = run {
+    var tmp = 0
+    "OK"
+}
+
+// 2 LOCALVARIABLE
+// 1 LOCALVARIABLE tmp I
+// 1 LOCALVARIABLE \$i\$a\$-run-NoFakeVariableForInlineOnlyFunWithLambdaKt\$test\$1 I
+
+// 0 LDC 0
+// 2 ICONST_0
+// 2 ISTORE