FIR: initial support of suspend conversion for function reference

compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/adaptedWithCoercionToUnit.kt

@@ -1,7 +1,6 @@
 // !LANGUAGE: +SuspendConversion
 // WITH_RUNTIME
 // WITH_COROUTINES
-// IGNORE_BACKEND_FIR: JVM_IR
 
 import helpers.*
 import kotlin.coroutines.*

compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/adaptedWithDefaultArguments.kt

@@ -1,7 +1,6 @@
 // !LANGUAGE: +SuspendConversion
 // WITH_RUNTIME
 // WITH_COROUTINES
-// IGNORE_BACKEND_FIR: JVM_IR
 
 import helpers.*
 import kotlin.coroutines.*

compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/crossInline.kt

@@ -1,7 +1,6 @@
 // !LANGUAGE: +SuspendConversion
 // WITH_RUNTIME
 // WITH_COROUTINES
-// IGNORE_BACKEND_FIR: JVM_IR
 
 import helpers.*
 import kotlin.coroutines.*

compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/inlineAdaptedWithCoercionToUnit.kt

@@ -1,7 +1,6 @@
 // !LANGUAGE: +SuspendConversion
 // WITH_RUNTIME
 // WITH_COROUTINES
-// IGNORE_BACKEND_FIR: JVM_IR
 
 import helpers.*
 import kotlin.coroutines.*

compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/inlineAdaptedWithDefaultArguments.kt

@@ -1,7 +1,6 @@
 // !LANGUAGE: +SuspendConversion
 // WITH_RUNTIME
 // WITH_COROUTINES
-// IGNORE_BACKEND_FIR: JVM_IR
 
 import helpers.*
 import kotlin.coroutines.*

compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/inlineSimple.kt

@@ -1,7 +1,6 @@
 // !LANGUAGE: +SuspendConversion
 // WITH_RUNTIME
 // WITH_COROUTINES
-// IGNORE_BACKEND_FIR: JVM_IR
 
 import helpers.*
 import kotlin.coroutines.*

compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/inlineWithParameters.kt

@@ -1,7 +1,6 @@
 // !LANGUAGE: +SuspendConversion
 // WITH_RUNTIME
 // WITH_COROUTINES
-// IGNORE_BACKEND_FIR: JVM_IR
 
 import helpers.*
 import kotlin.coroutines.*

compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/simple.kt

@@ -1,7 +1,6 @@
 // !LANGUAGE: +SuspendConversion
 // WITH_RUNTIME
 // WITH_COROUTINES
-// IGNORE_BACKEND_FIR: JVM_IR
 
 import helpers.*
 import kotlin.coroutines.*

compiler/testData/codegen/box/callableReference/adaptedReferences/suspendConversion/withParameters.kt

@@ -1,7 +1,6 @@
 // !LANGUAGE: +SuspendConversion
 // WITH_RUNTIME
 // WITH_COROUTINES
-// IGNORE_BACKEND_FIR: JVM_IR
 
 import helpers.*
 import kotlin.coroutines.*

compiler/testData/diagnostics/tests/suspendConversion/basicSuspendConversionForCallableReference.fir.kt

@@ -9,10 +9,10 @@ fun bar2(x: Int) {}
 fun bar2(s: String) {}
 
 fun test() {
-    <!INAPPLICABLE_CANDIDATE!>foo1<!>(::bar1)
+    foo1(::bar1)
 
-    <!INAPPLICABLE_CANDIDATE!>foo2<!>(42, <!UNRESOLVED_REFERENCE!>::bar2<!>)
-    <!INAPPLICABLE_CANDIDATE!>foo2<!>("str", <!UNRESOLVED_REFERENCE!>::bar2<!>)
+    foo2(42, ::bar2)
+    foo2("str", ::bar2)
 
     <!INAPPLICABLE_CANDIDATE!>foo2<!>(42, ::bar1)
 }

compiler/testData/diagnostics/tests/suspendConversion/suspendConversionCompatibility.fir.kt

@@ -22,7 +22,7 @@ object Test2 {
 
         fun test() {
             val result = foo(::bar)
-            <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.Int")!>result<!>
+            <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.String")!>result<!>
         }
     }
 }

compiler/testData/diagnostics/tests/suspendConversion/suspendConversionCompatibilityInDisabledMode.fir.kt

@@ -11,7 +11,7 @@ object Test1 {
 
         fun test() {
             val result = foo(::bar)
-            <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.Int")!>result<!>
+            <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.String")!>result<!>
         }
     }
 }
@@ -29,7 +29,7 @@ object Test2 {
 
             fun test() {
                 val result = foo(::bar)
-                <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.Double")!>result<!>
+                <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.String")!>result<!>
             }
         }
     }

compiler/testData/diagnostics/tests/suspendConversion/suspendConversionDisabled.fir.kt

@@ -20,7 +20,7 @@ fun test(
     <!INAPPLICABLE_CANDIDATE!>foo2<!>(f2)
     <!INAPPLICABLE_CANDIDATE!>foo3<!>(f3)
 
-    <!INAPPLICABLE_CANDIDATE!>foo1<!>(::bar)
+    foo1(::bar)
 
     <!INAPPLICABLE_CANDIDATE!>foo1<!>(f2)
     <!INAPPLICABLE_CANDIDATE!>foo1<!>(f3)

compiler/testData/diagnostics/tests/suspendConversion/suspendConversionWithFunInterfaces.fir.kt

@@ -1,21 +0,0 @@
-// !LANGUAGE: +SuspendConversion
-// !DIAGNOSTICS: -UNUSED_PARAMETER
-
-fun interface SuspendRunnable {
-    suspend fun invoke()
-}
-
-fun foo1(s: SuspendRunnable) {}
-fun bar1() {}
-
-fun bar2(s: String = ""): Int = 0
-
-fun bar3() {}
-suspend fun bar3(s: String = ""): Int = 0
-
-fun test() {
-    <!INAPPLICABLE_CANDIDATE!>foo1<!>(::bar1)
-    <!INAPPLICABLE_CANDIDATE!>foo1<!>(::bar2)
-
-    foo1(::bar3) // Should be ambiguity
-}

compiler/testData/diagnostics/tests/suspendConversion/suspendConversionWithFunInterfaces.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !LANGUAGE: +SuspendConversion
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 

compiler/testData/diagnostics/tests/suspendConversion/suspendConversionWithReferenceAdaptation.fir.kt

@@ -14,8 +14,8 @@ fun unitCoercionAndDefaults(f: suspend () -> Unit) {}
 fun all(s: String = ""): Int = 0
 
 fun test() {
-    <!INAPPLICABLE_CANDIDATE!>unitCoercion<!>(::foo)
-    <!INAPPLICABLE_CANDIDATE!>defaults<!>(::bar)
+    unitCoercion(::foo)
+    defaults(::bar)
     <!INAPPLICABLE_CANDIDATE!>varargs<!>(::baz)
-    <!INAPPLICABLE_CANDIDATE!>unitCoercionAndDefaults<!>(::all)
+    unitCoercionAndDefaults(::all)
 }

compiler/testData/diagnostics/tests/unitConversion/chainedFunSuspendUnitConversion.fir.kt

@@ -14,5 +14,5 @@ abstract class SubInt : () -> Int
 fun test(f: () -> String, s: SubInt) {
     <!INAPPLICABLE_CANDIDATE!>foo<!>(f)
     <!INAPPLICABLE_CANDIDATE!>foo<!>(s)
-    <!INAPPLICABLE_CANDIDATE!>foo<!>(::bar)
+    foo(::bar)
 }

compiler/testData/diagnostics/tests/unitConversion/chainedUnitSuspendConversion.fir.kt

@@ -8,7 +8,7 @@ fun bar(): String = ""
 abstract class SubInt : () -> Int
 
 fun test(g: () -> Double, s: SubInt) {
-    <!INAPPLICABLE_CANDIDATE!>foo<!>(::bar)
+    foo(::bar)
     <!INAPPLICABLE_CANDIDATE!>foo<!>(g)
     <!INAPPLICABLE_CANDIDATE!>foo<!>(s)
 }

compiler/testData/ir/irText/expressions/callableReferences/suspendConversion.fir.txt

@@ -59,30 +59,50 @@ FILE fqName:<root> fileName:/suspendConversion.kt
         fn: FUNCTION_REFERENCE 'public final fun foo0 (): kotlin.Unit [suspend] declared in <root>' type=kotlin.reflect.KSuspendFunction0<kotlin.Unit> origin=null reflectionTarget=<same>
   FUN name:testSuspendPlain visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
-      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/useSuspend]>#' type=IrErrorType
-        FUNCTION_REFERENCE 'public final fun foo1 (): kotlin.Unit declared in <root>' type=kotlin.reflect.KFunction0<kotlin.Unit> origin=null reflectionTarget=<same>
+      CALL 'public final fun useSuspend (fn: kotlin.coroutines.SuspendFunction0<kotlin.Unit>): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
+        fn: FUN_EXPR type=kotlin.coroutines.SuspendFunction0<kotlin.Unit> origin=ADAPTED_FUNCTION_REFERENCE
+          FUN ADAPTER_FOR_CALLABLE_REFERENCE name:foo1 visibility:local modality:FINAL <> () returnType:kotlin.Unit [suspend]
+            BLOCK_BODY
+              CALL 'public final fun foo1 (): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
   FUN name:testSuspendWithArgs visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
-      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/useSuspendInt]>#' type=IrErrorType
-        FUNCTION_REFERENCE 'public final fun fooInt (x: kotlin.Int): kotlin.Unit declared in <root>' type=kotlin.reflect.KFunction1<kotlin.Int, kotlin.Unit> origin=null reflectionTarget=<same>
+      CALL 'public final fun useSuspendInt (fn: kotlin.coroutines.SuspendFunction1<kotlin.Int, kotlin.Unit>): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
+        fn: FUN_EXPR type=kotlin.coroutines.SuspendFunction1<kotlin.Int, kotlin.Unit> origin=ADAPTED_FUNCTION_REFERENCE
+          FUN ADAPTER_FOR_CALLABLE_REFERENCE name:fooInt visibility:local modality:FINAL <> (p0:kotlin.Int) returnType:kotlin.Unit [suspend]
+            VALUE_PARAMETER ADAPTER_PARAMETER_FOR_CALLABLE_REFERENCE name:p0 index:0 type:kotlin.Int
+            BLOCK_BODY
+              CALL 'public final fun fooInt (x: kotlin.Int): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
+                x: GET_VAR 'p0: kotlin.Int declared in <root>.testSuspendWithArgs.fooInt' type=kotlin.Int origin=null
   FUN name:testWithVararg visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
-      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/useSuspend]>#' type=IrErrorType
-        FUNCTION_REFERENCE 'public final fun foo2 (vararg xs: kotlin.Int): kotlin.Unit declared in <root>' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.Unit> origin=null reflectionTarget=<same>
+      CALL 'public final fun useSuspend (fn: kotlin.coroutines.SuspendFunction0<kotlin.Unit>): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
+        fn: FUN_EXPR type=kotlin.coroutines.SuspendFunction0<kotlin.Unit> origin=ADAPTED_FUNCTION_REFERENCE
+          FUN ADAPTER_FOR_CALLABLE_REFERENCE name:foo2 visibility:local modality:FINAL <> () returnType:kotlin.Unit [suspend]
+            BLOCK_BODY
+              CALL 'public final fun foo2 (vararg xs: kotlin.Int): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
   FUN name:testWithVarargMapped visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
       ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/useSuspendInt]>#' type=IrErrorType
         FUNCTION_REFERENCE 'public final fun foo2 (vararg xs: kotlin.Int): kotlin.Unit declared in <root>' type=kotlin.reflect.KFunction1<kotlin.IntArray, kotlin.Unit> origin=null reflectionTarget=<same>
   FUN name:testWithCoercionToUnit visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
-      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/useSuspend]>#' type=IrErrorType
-        FUNCTION_REFERENCE 'public final fun foo3 (): kotlin.Int declared in <root>' type=kotlin.reflect.KFunction0<kotlin.Int> origin=null reflectionTarget=<same>
+      CALL 'public final fun useSuspend (fn: kotlin.coroutines.SuspendFunction0<kotlin.Unit>): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
+        fn: FUN_EXPR type=kotlin.coroutines.SuspendFunction0<kotlin.Unit> origin=ADAPTED_FUNCTION_REFERENCE
+          FUN ADAPTER_FOR_CALLABLE_REFERENCE name:foo3 visibility:local modality:FINAL <> () returnType:kotlin.Unit [suspend]
+            BLOCK_BODY
+              RETURN type=kotlin.Nothing from='local final fun foo3 (): kotlin.Unit [suspend] declared in <root>.testWithCoercionToUnit'
+                CALL 'public final fun foo3 (): kotlin.Int declared in <root>' type=kotlin.Int origin=null
   FUN name:testWithDefaults visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
-      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/useSuspend]>#' type=IrErrorType
-        FUNCTION_REFERENCE 'public final fun foo4 (i: kotlin.Int): kotlin.Unit declared in <root>' type=kotlin.reflect.KFunction1<kotlin.Int, kotlin.Unit> origin=null reflectionTarget=<same>
+      CALL 'public final fun useSuspend (fn: kotlin.coroutines.SuspendFunction0<kotlin.Unit>): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
+        fn: FUN_EXPR type=kotlin.coroutines.SuspendFunction0<kotlin.Unit> origin=ADAPTED_FUNCTION_REFERENCE
+          FUN ADAPTER_FOR_CALLABLE_REFERENCE name:foo4 visibility:local modality:FINAL <> () returnType:kotlin.Unit [suspend]
+            BLOCK_BODY
+              CALL 'public final fun foo4 (i: kotlin.Int): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
   FUN name:testWithBoundReceiver visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
-      ERROR_CALL 'Unresolved reference: <Inapplicable(INAPPLICABLE): [/useSuspend]>#' type=IrErrorType
-        FUNCTION_REFERENCE 'public final fun bar (): kotlin.Unit declared in <root>.C' type=kotlin.reflect.KFunction0<kotlin.Unit> origin=null reflectionTarget=<same>
-          $this: CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in <root>.C' type=<root>.C origin=null
+      CALL 'public final fun useSuspend (fn: kotlin.coroutines.SuspendFunction0<kotlin.Unit>): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
+        fn: FUN_EXPR type=kotlin.coroutines.SuspendFunction0<kotlin.Unit> origin=ADAPTED_FUNCTION_REFERENCE
+          FUN ADAPTER_FOR_CALLABLE_REFERENCE name:bar visibility:local modality:FINAL <> () returnType:kotlin.Unit [suspend]
+            BLOCK_BODY
+              CALL 'public final fun bar (): kotlin.Unit declared in <root>.C' type=kotlin.Unit origin=null