[K/N][Tests] Move filecheck and cinterop tests to /native/

^KT-61259

native/native.tests/testData/codegen/fileCheck/single_tls_load.kt

@@ -0,0 +1,36 @@
+// TARGET_BACKEND: NATIVE
+// FILECHECK_STAGE: OptimizeTLSDataLoads
+
+class Wrapper(x: Int)
+
+// CHECK-LABEL: define internal fastcc %struct.ObjHeader* @"kfun:#f(kotlin.Int;kotlin.String){}kotlin.String"
+fun f(x: Int, s: String): String {
+    // https://youtrack.jetbrains.com/issue/KT-64880/K-N-EnterFrame-runtime-function-should-be-always-inlined-in-OPT-mode
+    // Remove `|call fastcc void @EnterFrame` below, after KT-64880 is fixed
+    // `call .. @EnterFrame` may or may not be inlined.
+    // - in case it would be inlined, several `load .. currentThreadDataNode` would happen, and only first of them must stay
+    // after `OptimizeTLSDataLoads` optimizaion phase.
+    // - in case of no-inline, several `call .. @EnterFrame` may remain in function code.
+
+    // CHECK: {{_ZN6kotlin2mm14ThreadRegistry22currentThreadDataNode_E|call fastcc void @EnterFrame}}
+    // CHECK-NOT: _ZN6kotlin2mm14ThreadRegistry22currentThreadDataNode_E
+    if (x < 0) throw IllegalStateException()
+    if (x > 0) return f(x - 1, s)
+    val b = Wrapper(2)
+    val a = listOf(x, x, Wrapper(1), 2, x)
+    return buildString {
+        for (i in a) { appendLine("$s i") }
+    }
+// CHECK-LABEL: epilogue:
+}
+
+fun box(): String {
+    val result = f(10, "123456")
+    return if (result == "123456 i\n" +
+        "123456 i\n" +
+        "123456 i\n" +
+        "123456 i\n" +
+        "123456 i\n")
+        "OK"
+    else "FAIL: $result"
+}