FIC: Support conversions for suspend functions

compiler/fir/resolve/tests/org/jetbrains/kotlin/fir/FirDiagnosticsSmokeTestGenerated.java

@@ -7833,6 +7833,11 @@ public class FirDiagnosticsSmokeTestGenerated extends AbstractFirDiagnosticsSmok
         public void testSeveralConversionsForFunInterface() throws Exception {
             runTest("compiler/testData/diagnostics/tests/funInterface/severalConversionsForFunInterface.kt");
         }
+
+        @TestMetadata("suspendFunInterfaceConversion.kt")
+        public void testSuspendFunInterfaceConversion() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/funInterface/suspendFunInterfaceConversion.kt");
+        }
     }
 
     @TestMetadata("compiler/testData/diagnostics/tests/functionAsExpression")

compiler/frontend.java/src/org/jetbrains/kotlin/load/java/sam/SingleAbstractMethodUtils.java

@@ -129,7 +129,7 @@ public class SingleAbstractMethodUtils {
 
         return FunctionTypesKt.createFunctionType(
                 DescriptorUtilsKt.getBuiltIns(function), Annotations.Companion.getEMPTY(),
-                receiverType, parameterTypes, parameterNames, returnType
+                receiverType, parameterTypes, parameterNames, returnType, function.isSuspend()
         );
     }
 

compiler/testData/diagnostics/tests/funInterface/suspendFunInterfaceConversion.kt

@@ -0,0 +1,14 @@
+// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions +SamConversionPerArgument +FunctionInterfaceConversion
+// !DIAGNOSTICS: -UNUSED_PARAMETER -NOTHING_TO_INLINE
+
+fun interface SuspendRunnable {
+    suspend fun invoke()
+}
+
+fun run(r: SuspendRunnable) {}
+
+suspend fun bar() {}
+
+fun test() {
+    run(::bar)
+}

compiler/testData/diagnostics/tests/funInterface/suspendFunInterfaceConversion.txt

@@ -0,0 +1,12 @@
+package
+
+public suspend fun bar(): kotlin.Unit
+public fun run(/*0*/ r: SuspendRunnable): kotlin.Unit
+public fun test(): kotlin.Unit
+
+public interface SuspendRunnable {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public abstract suspend fun invoke(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestGenerated.java

@@ -7915,6 +7915,11 @@ public class DiagnosticsTestGenerated extends AbstractDiagnosticsTest {
             public void testSeveralConversionsForFunInterface() throws Exception {
                 runTest("compiler/testData/diagnostics/tests/funInterface/severalConversionsForFunInterface.kt");
             }
+
+            @TestMetadata("suspendFunInterfaceConversion.kt")
+            public void testSuspendFunInterfaceConversion() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/funInterface/suspendFunInterfaceConversion.kt");
+            }
         }
 
         @TestMetadata("compiler/testData/diagnostics/tests/functionAsExpression")

compiler/tests/org/jetbrains/kotlin/checkers/javac/DiagnosticsUsingJavacTestGenerated.java

@@ -7910,6 +7910,11 @@ public class DiagnosticsUsingJavacTestGenerated extends AbstractDiagnosticsUsing
             public void testSeveralConversionsForFunInterface() throws Exception {
                 runTest("compiler/testData/diagnostics/tests/funInterface/severalConversionsForFunInterface.kt");
             }
+
+            @TestMetadata("suspendFunInterfaceConversion.kt")
+            public void testSuspendFunInterfaceConversion() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/funInterface/suspendFunInterfaceConversion.kt");
+            }
         }
 
         @TestMetadata("compiler/testData/diagnostics/tests/functionAsExpression")