JVM_IR KT-34594 strip fake variable initialization during inlining

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