[FIR] Use SpecialNames.NO_NAME_PROVIDED everywhere

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/FirConflictsHelpers.kt

@@ -33,12 +33,11 @@ import org.jetbrains.kotlin.fir.util.ListMultimap
 import org.jetbrains.kotlin.fir.visitors.FirVisitorVoid
 import org.jetbrains.kotlin.name.CallableId
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.name.SpecialNames
 import org.jetbrains.kotlin.utils.SmartSet
 
 internal class FirDefaultDeclarationPresenter : FirDeclarationPresenter
 
-private val NO_NAME_PROVIDED = Name.special("<no name provided>")
-
 private val MAIN_FUNCTION_SHAPES = setOf(
     "<>[]():kotlin/Unit",
     "<>[](kotlin/Array<kotlin/String,>,):kotlin/Unit",
@@ -74,9 +73,9 @@ private val FirSimpleFunction.representsMainFunctionAllowingConflictingOverloads
 // - see tests with `fun () {}`.
 // you can't redeclare something that has no name.
 private fun FirDeclaration.isCollectable() = when (this) {
-    is FirSimpleFunction -> source?.kind !is KtFakeSourceElementKind && name != NO_NAME_PROVIDED
+    is FirSimpleFunction -> source?.kind !is KtFakeSourceElementKind && name != SpecialNames.NO_NAME_PROVIDED
     is FirProperty -> source?.kind !is KtFakeSourceElementKind.EnumGeneratedDeclaration
-    is FirRegularClass -> name != NO_NAME_PROVIDED
+    is FirRegularClass -> name != SpecialNames.NO_NAME_PROVIDED
     else -> true
 }
 

compiler/fir/fir-serialization/src/org/jetbrains/kotlin/fir/serialization/FirElementSerializer.kt

@@ -527,7 +527,7 @@ class FirElementSerializer private constructor(
                 function.name
             }
             is FirAnonymousFunction -> {
-                if (function.isLambda) SpecialNames.ANONYMOUS else Name.special("<no name provided>")
+                if (function.isLambda) SpecialNames.ANONYMOUS else SpecialNames.NO_NAME_PROVIDED
             }
             else -> throw AssertionError("Unsupported function: ${function.render()}")
         }

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrClassifierStorage.kt

@@ -35,6 +35,7 @@ import org.jetbrains.kotlin.ir.types.impl.IrSimpleTypeImpl
 import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.name.SpecialNames
 import org.jetbrains.kotlin.name.StandardClassIds
 import org.jetbrains.kotlin.utils.addToStdlib.runIf
 import org.jetbrains.kotlin.utils.addToStdlib.runUnless
@@ -382,7 +383,7 @@ class Fir2IrClassifierStorage(
     fun registerIrAnonymousObject(
         anonymousObject: FirAnonymousObject,
         visibility: Visibility = Visibilities.Local,
-        name: Name = Name.special("<no name provided>"),
+        name: Name = SpecialNames.NO_NAME_PROVIDED,
         irParent: IrDeclarationParent? = null
     ): IrClass {
         val origin = IrDeclarationOrigin.DEFINED

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrDeclarationStorage.kt

@@ -580,7 +580,7 @@ class Fir2IrDeclarationStorage(
             return createIrLazyFunction(function as FirSimpleFunction, signature, irParent, updatedOrigin)
         }
         val name = simpleFunction?.name
-            ?: if (isLambda) SpecialNames.ANONYMOUS else Name.special("<no name provided>")
+            ?: if (isLambda) SpecialNames.ANONYMOUS else SpecialNames.NO_NAME_PROVIDED
         val visibility = simpleFunction?.visibility ?: Visibilities.Local
         val isSuspend =
             if (isLambda) ((function as FirAnonymousFunction).typeRef as? FirResolvedTypeRef)?.type?.isSuspendOrKSuspendFunctionType(session) == true