Test framework for inline

compiler/testData/codegen/boxInline/stackHeightBug/1.kt

@@ -0,0 +1,6 @@
+import test.*
+
+fun box(): String {
+    mfun{ "".toLowerCase2() }
+    return "OK"
+}

compiler/testData/codegen/boxInline/stackHeightBug/2.kt

@@ -0,0 +1,8 @@
+package test
+
+inline fun <R> mfun(f: () -> R) {
+    f()
+    f()
+}
+
+public inline fun String.toLowerCase2() : String = ""