[KN] CInterop: __attribute__((objc_direct)) support

Merge-request: KT-MR-8828
Merged-by: Gleb Lukianets <Gleb.Lukianets@jetbrains.com>

kotlin-native/backend.native/tests/interop/objc/direct/direct.def

@@ -0,0 +1,2 @@
+language = Objective-C
+headerFilter = **/direct.h

kotlin-native/backend.native/tests/interop/objc/direct/direct.h

@@ -0,0 +1,32 @@
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+__attribute__((objc_runtime_name("CC")))
+__attribute__((swift_name("CC")))
+@interface CallingConventions : NSObject
+
++ (NSUInteger)regular:(NSUInteger)arg;
+- (NSUInteger)regular:(NSUInteger)arg;
+
++ (NSUInteger)direct:(NSUInteger)arg __attribute__((objc_direct));
+- (NSUInteger)direct:(NSUInteger)arg __attribute__((objc_direct));
+
+@end
+
+@interface CallingConventions(Ext)
+
++ (NSUInteger)regularExt:(NSUInteger)arg;
+- (NSUInteger)regularExt:(NSUInteger)arg;
+
++ (NSUInteger)directExt:(NSUInteger)arg __attribute__((objc_direct));
+- (NSUInteger)directExt:(NSUInteger)arg __attribute__((objc_direct));
+
+@end
+
+__attribute__((objc_runtime_name("CCH")))
+__attribute__((swift_name("CCH")))
+@interface CallingConventionsHeir : CallingConventions
+@end
+
+NS_ASSUME_NONNULL_END

kotlin-native/backend.native/tests/interop/objc/direct/direct.m

@@ -0,0 +1,27 @@
+#import "direct.h"
+
+#define TEST_METHOD_IMPL(NAME) (NSUInteger)NAME:(NSUInteger)arg { return arg; }
+
+@implementation CallingConventions : NSObject
+
++ TEST_METHOD_IMPL(regular);
+- TEST_METHOD_IMPL(regular);
+
++ TEST_METHOD_IMPL(direct);
+- TEST_METHOD_IMPL(direct);
+
+@end
+
+@implementation CallingConventions(Ext)
+
++ TEST_METHOD_IMPL(regularExt);
+- TEST_METHOD_IMPL(regularExt);
+
++ TEST_METHOD_IMPL(directExt);
+- TEST_METHOD_IMPL(directExt);
+
+@end
+
+@implementation CallingConventionsHeir
+
+@end

kotlin-native/backend.native/tests/interop/objc/direct/main.kt

@@ -0,0 +1,46 @@
+import direct.*
+import kotlinx.cinterop.*
+import kotlin.test.*
+
+class CallingConventionsNativeHeir() : CallingConventions() {
+    // nothing
+}
+
+typealias CC = CallingConventions
+typealias CCH = CallingConventionsHeir
+typealias CCN = CallingConventionsNativeHeir
+
+// KT-54610
+fun main(args: Array<String>) {
+    autoreleasepool {
+        val cc = CC()
+        val cch = CCH()
+        val ccn = CCN()
+
+        assertEquals(42UL, CC.regular(42))
+        assertEquals(42UL, cc.regular(42))
+        assertEquals(42UL, CC.regularExt(42))
+        assertEquals(42UL, cc.regularExt(42))
+
+        assertEquals(42UL, CCH.regular(42))
+        assertEquals(42UL, cch.regular(42))
+        assertEquals(42UL, CCH.regularExt(42))
+        assertEquals(42UL, cch.regularExt(42))
+
+        assertEquals(42UL, ccn.regular(42UL))
+        assertEquals(42UL, ccn.regularExt(42UL))
+
+        assertEquals(42UL, CC.direct(42))
+        assertEquals(42UL, cc.direct(42))
+        assertEquals(42UL, CC.directExt(42))
+        assertEquals(42UL, cc.directExt(42))
+
+        assertEquals(42UL, CCH.direct(42))
+        assertEquals(42UL, cch .direct(42))
+        assertEquals(42UL, CCH.directExt(42))
+        assertEquals(42UL, cch .directExt(42))
+
+        assertEquals(42UL, ccn .direct(42UL))
+        assertEquals(42UL, ccn .directExt(42UL))
+    }
+}