JVM KT-49092 fix stack corruption in redundant boxing elimination

compiler/testData/codegen/box/boxingOptimization/kt49092a.kt

@@ -0,0 +1,9 @@
+fun foo(x: Any, y: Any) {}
+
+val y = true
+val z = 1L
+
+fun box(): String {
+    var q = "Failed"
+    foo(if (y) { q = "OK"; z } else "", return q)
+}

compiler/testData/codegen/box/boxingOptimization/kt49092b.kt

@@ -0,0 +1,9 @@
+fun foo(x: Any, y: Any) {}
+
+val y = false
+val z = 1L
+
+fun box(): String {
+    var q = "Failed"
+    foo(if (y) "" else { q = "OK"; z }, return q)
+}

compiler/testData/codegen/box/boxingOptimization/kt49092c.kt

@@ -0,0 +1,10 @@
+fun foo(x: Any, y: Any) {}
+
+val y = false
+val zInt = 1
+val zLong = 1L
+
+fun box(): String {
+    var q = "Failed"
+    foo(if (y) zInt else { q = "OK"; zLong }, return q)
+}

compiler/testData/codegen/box/boxingOptimization/kt49092d.kt

@@ -0,0 +1,9 @@
+fun foo(x: Any, y: Any) {}
+
+val y = true
+val z = 1
+
+fun box(): String {
+    var q = "Failed"
+    foo(if (y) { q = "OK"; z } else "", return q)
+}

compiler/testData/codegen/box/boxingOptimization/kt49092e.kt

@@ -0,0 +1,10 @@
+fun foo(x: Any, y: Any) {}
+
+val y = true
+val zByte = 1.toByte()
+val zShort = 1.toShort()
+
+fun box(): String {
+    var q = "Failed"
+    foo(if (y) { q = "OK"; zByte } else zShort, return q)
+}

compiler/testData/codegen/box/boxingOptimization/kt49092f.kt

@@ -0,0 +1,10 @@
+fun foo(x: Any, y: Any) {}
+
+val y = true
+val z = 1L
+
+fun box(): String {
+    var q = "Failed"
+    val v = if (y) { q = "OK"; z } else ""
+    foo(v, return q)
+}