Add tests for converting expressions of function types to suspending functional types

compiler/testData/codegen/box/suspendConversion/basicSuspendConversionGenerics.kt

@@ -0,0 +1,54 @@
+// !LANGUAGE: +SuspendConversion
+// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
+// WITH_RUNTIME
+
+class Inv2<T, K>
+
+inline fun <reified T> materialize(): T = T::class.java.newInstance()
+
+inline fun <reified T> foo1(crossinline f: suspend (T) -> String): T = materialize()
+inline fun <reified T> foo2(crossinline f: suspend () -> T): T = materialize()
+inline fun <reified T, K> foo3(crossinline f: suspend (T) -> K): Inv2<T, K> = Inv2()
+
+fun <T> foo11(f: suspend (T) -> String): T = 1 as T
+fun <T> foo21(f: suspend () -> T): T = "" as T
+fun <T, K> foo31(f: suspend (T) -> K): Inv2<T, K> = Inv2()
+
+fun <I> id(e: I): I = e
+
+fun test(f: (Int) -> String, g: () -> String) {
+    val a0 = foo1(f)
+    val a01 = foo11(f)
+    <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.Int")!>a0<!>
+    <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.Int")!>a01<!>
+
+    val a1 = foo2(g)
+    val a11 = foo21(g)
+    <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.String")!>a1<!>
+    <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.String")!>a11<!>
+
+    val a2 = foo3(f)
+    val a21 = foo31(f)
+    <!DEBUG_INFO_EXPRESSION_TYPE("Inv2<kotlin.Int, kotlin.String>")!>a2<!>
+    <!DEBUG_INFO_EXPRESSION_TYPE("Inv2<kotlin.Int, kotlin.String>")!>a21<!>
+
+    val a3 = foo1(id(f))
+    val a31 = foo11(id(f))
+    <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.Int")!>a3<!>
+    <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.Int")!>a31<!>
+
+    val a4 = foo2(id(g))
+    val a41 = foo21(id(g))
+    <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.String")!>a4<!>
+    <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.String")!>a41<!>
+
+    val a5 = foo3(id(f))
+    val a51 = foo31(id(f))
+    <!DEBUG_INFO_EXPRESSION_TYPE("Inv2<kotlin.Int, kotlin.String>")!>a5<!>
+    <!DEBUG_INFO_EXPRESSION_TYPE("Inv2<kotlin.Int, kotlin.String>")!>a51<!>
+}
+
+fun box(): String {
+    test({ it.toString() }, { "" })
+    return "OK"
+}