Always do stack spilling during inline cause of dex problem

Dex issue: https://issuetracker.google.com/issues/68796377

  #KT-20844 Fixed

compiler/testData/codegen/box/optimizations/kt20844.kt

@@ -0,0 +1,9 @@
+//WITH_RUNTIME
+
+fun foo(x: String, ys: List<String>) =
+        x + ys.fold("", { a, b -> a + b })
+
+var flag = true
+
+fun box(): String =
+        foo("O", if (flag) listOf("k").map { it.toUpperCase() } else listOf())

compiler/testData/codegen/boxInline/optimizations/kt20844.kt

@@ -0,0 +1,27 @@
+// FILE: 1.kt
+//WITH_RUNTIME
+package test
+
+data class Address(
+        val createdTimeMs: Long = 0,
+        val firstName: String = "",
+        val lastName: String = ""
+)
+
+inline fun String.switchIfEmpty(provider: () -> String): String {
+    return if (isEmpty()) provider() else this
+}
+
+// FILE: 2.kt
+
+import test.*
+
+fun box(): String {
+    val address = Address()
+    val result = address.copy(
+            firstName = address.firstName.switchIfEmpty { "O" },
+            lastName = address.lastName.switchIfEmpty { "K" }
+    )
+
+    return result.firstName + result.lastName
+}

compiler/testData/codegen/bytecodeText/storeStackBeforeInline/simple.kt

@@ -9,6 +9,6 @@ fun foo() : Int {
     return foobar(1, bar(2), 3)
 }
 
-// 1 ISTORE
-// 5 ILOAD
+// 3 ISTORE
+// 7 ILOAD
 // 0 InlineMarker