Build compiler with -Xjvm-default=all + @JvmDefaultCompatibility when needed

compiler/frontend/build.gradle.kts

@@ -24,8 +24,4 @@ dependencies {
 sourceSets {
     "main" { projectDefault() }
     "test" {}
-}
-
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
-    kotlinOptions.freeCompilerArgs += "-Xjvm-default=compatibility"
 }

compiler/frontend/src/org/jetbrains/kotlin/extensions/internal/NonStableExtensionPoints.kt

@@ -55,8 +55,6 @@ interface TypeResolutionInterceptorExtension {
 
 @InternalNonStableExtensionPoints
 interface CallResolutionInterceptorExtension {
-    @Suppress("DEPRECATION")
-    @JvmDefault
     fun interceptResolvedCallAtomCandidate(
         candidateDescriptor: CallableDescriptor,
         completedCallAtom: ResolvedCallAtom,
@@ -65,8 +63,6 @@ interface CallResolutionInterceptorExtension {
         diagnostics: Collection<KotlinCallDiagnostic>
     ): CallableDescriptor = candidateDescriptor
 
-    @Suppress("DEPRECATION")
-    @JvmDefault
     fun interceptCandidates(
         candidates: Collection<NewResolutionOldInference.MyCandidate>,
         context: BasicCallResolutionContext,
@@ -77,8 +73,6 @@ interface CallResolutionInterceptorExtension {
         tracing: TracingStrategy
     ): Collection<NewResolutionOldInference.MyCandidate> = candidates
 
-    @Suppress("DEPRECATION")
-    @JvmDefault
     fun interceptFunctionCandidates(
         candidates: Collection<FunctionDescriptor>,
         scopeTower: ImplicitScopeTower,
@@ -89,8 +83,6 @@ interface CallResolutionInterceptorExtension {
         location: LookupLocation
     ): Collection<FunctionDescriptor> = candidates
 
-    @Suppress("DEPRECATION")
-    @JvmDefault
     fun interceptFunctionCandidates(
         candidates: Collection<FunctionDescriptor>,
         scopeTower: ImplicitScopeTower,
@@ -103,8 +95,6 @@ interface CallResolutionInterceptorExtension {
         extensionReceiver: ReceiverValueWithSmartCastInfo?
     ): Collection<FunctionDescriptor> = candidates
 
-    @Suppress("DEPRECATION")
-    @JvmDefault
     fun interceptVariableCandidates(
         candidates: Collection<VariableDescriptor>,
         scopeTower: ImplicitScopeTower,
@@ -115,8 +105,6 @@ interface CallResolutionInterceptorExtension {
         location: LookupLocation
     ): Collection<VariableDescriptor> = candidates
 
-    @Suppress("DEPRECATION")
-    @JvmDefault
     fun interceptVariableCandidates(
         candidates: Collection<VariableDescriptor>,
         scopeTower: ImplicitScopeTower,

compiler/frontend/src/org/jetbrains/kotlin/resolve/extensions/SyntheticResolveExtension.kt

@@ -144,8 +144,6 @@ interface SyntheticResolveExtension {
 
     fun getSyntheticFunctionNames(thisDescriptor: ClassDescriptor): List<Name> = emptyList()
 
-    @Suppress("DEPRECATION")
-    @JvmDefault
     fun getSyntheticPropertiesNames(thisDescriptor: ClassDescriptor): List<Name> = emptyList()
 
     fun getSyntheticNestedClassNames(thisDescriptor: ClassDescriptor): List<Name> = emptyList()
@@ -155,8 +153,6 @@ interface SyntheticResolveExtension {
      * or null in case it needs to run resolution and inference and/or it is very costly.
      * Override this method if resolution started to fail with recursion.
      */
-    @Suppress("DEPRECATION")
-    @JvmDefault
     fun getPossibleSyntheticNestedClassNames(thisDescriptor: ClassDescriptor): List<Name>? = getSyntheticNestedClassNames(thisDescriptor)
 
     fun addSyntheticSupertypes(thisDescriptor: ClassDescriptor, supertypes: MutableList<KotlinType>) {}

compiler/plugin-api/build.gradle.kts

@@ -15,8 +15,4 @@ sourceSets {
     "test" {}
 }
 
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
-    kotlinOptions.freeCompilerArgs += "-Xjvm-default=all-compatibility"
-}
-
 optInToExperimentalCompilerApi()

compiler/plugin-api/src/org/jetbrains/kotlin/compiler/plugin/CommandLineProcessor.kt

@@ -20,6 +20,7 @@ import org.jetbrains.kotlin.config.CompilerConfiguration
 import org.jetbrains.kotlin.config.CompilerConfigurationKey
 
 @ExperimentalCompilerApi
+@JvmDefaultWithCompatibility
 interface CommandLineProcessor {
     val pluginId: String
     val pluginOptions: Collection<AbstractCliOption>

compiler/psi/src/org/jetbrains/kotlin/psi/KtImportDirective.java

@@ -83,12 +83,6 @@ public class KtImportDirective extends KtElementImplStub<KotlinImportDirectiveSt
         return new ImportContent.ExpressionBased(reference);
     }
 
-    @Nullable
-    @Override
-    public Name getImportedName() {
-        return KtImportInfo.DefaultImpls.getImportedName(this);
-    }
-
     @Override
     @Nullable
     @IfNotParsed