FIR: Simplify resolution for qualifier receiver

Seems there's no need anymore in ClassifierPrioritized group

.idea/runConfigurations.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
+      <set>
+        <option value="com.android.tools.idea.compose.preview.runconfiguration.ComposePreviewRunConfigurationProducer" />
+      </set>
+    </option>
+  </component>
+</project>

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/FirCallResolver.kt

@@ -167,9 +167,6 @@ class FirCallResolver(
             name,
             explicitReceiver,
             argumentList,
-            isPotentialQualifierPart = qualifiedAccess !is FirFunctionCall &&
-                    qualifiedAccess.explicitReceiver is FirResolvedQualifier &&
-                    qualifiedResolver.isPotentialQualifierPartPosition(),
             isImplicitInvoke = qualifiedAccess is FirImplicitInvokeCall,
             typeArguments,
             session,
@@ -450,7 +447,6 @@ class FirCallResolver(
             name,
             explicitReceiver = null,
             delegatedConstructorCall.argumentList,
-            isPotentialQualifierPart = false,
             isImplicitInvoke = false,
             typeArguments = typeArguments,
             session,
@@ -499,7 +495,6 @@ class FirCallResolver(
             name = reference.name,
             explicitReceiver = null,
             annotation.argumentList,
-            isPotentialQualifierPart = false,
             isImplicitInvoke = false,
             typeArguments = emptyList(),
             session,
@@ -610,7 +605,6 @@ class FirCallResolver(
             callableReferenceAccess.calleeReference.name,
             callableReferenceAccess.explicitReceiver,
             FirEmptyArgumentList,
-            isPotentialQualifierPart = false,
             isImplicitInvoke = false,
             emptyList(),
             session,

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/Candidate.kt

@@ -43,7 +43,6 @@ data class CallInfo(
 
     val explicitReceiver: FirExpression?,
     val argumentList: FirArgumentList,
-    val isPotentialQualifierPart: Boolean,
     val isImplicitInvoke: Boolean,
 
     val typeArguments: List<FirTypeProjection>,

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/tower/FirTowerResolveTask.kt

@@ -162,16 +162,8 @@ internal open class FirTowerResolveTask(
     ) {
         val qualifierReceiver = createQualifierReceiver(resolvedQualifier, session, components.scopeSession)
 
-        when {
+        processQualifierScopes(info, qualifierReceiver)
-            info.isPotentialQualifierPart -> {
+        processClassifierScope(info, qualifierReceiver)
-                processClassifierScope(info, qualifierReceiver, prioritized = true)
-                processQualifierScopes(info, qualifierReceiver)
-            }
-            else -> {
-                processQualifierScopes(info, qualifierReceiver)
-                processClassifierScope(info, qualifierReceiver, prioritized = false)
-            }
-        }
 
         if (resolvedQualifier.symbol != null) {
             val typeRef = resolvedQualifier.typeRef
@@ -208,7 +200,7 @@ internal open class FirTowerResolveTask(
     }
 
     private suspend fun processClassifierScope(
-        info: CallInfo, qualifierReceiver: QualifierReceiver?, prioritized: Boolean
+        info: CallInfo, qualifierReceiver: QualifierReceiver?
     ) {
         if (qualifierReceiver == null) return
         if (info.callKind != CallKind.CallableReference &&
@@ -216,10 +208,9 @@ internal open class FirTowerResolveTask(
             qualifierReceiver.classSymbol != qualifierReceiver.originalSymbol
         ) return
         val scope = qualifierReceiver.classifierScope() ?: return
-        val group = if (prioritized) TowerGroup.ClassifierPrioritized else TowerGroup.Classifier
         processLevel(
             scope.toScopeTowerLevel(includeInnerConstructors = false), info,
-            group
+            TowerGroup.Classifier
         )
     }
 

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/tower/TowerGroup.kt

@@ -28,23 +28,21 @@ sealed class TowerGroupKind(val index: Byte) : Comparable<TowerGroupKind> {
 
     object Start : TowerGroupKind(0b0)
 
-    object ClassifierPrioritized : TowerGroupKind(1)
+    object Qualifier : TowerGroupKind(1)
 
-    object Qualifier : TowerGroupKind(2)
+    object Classifier : TowerGroupKind(2)
 
-    object Classifier : TowerGroupKind(3)
+    class TopPrioritized(depth: Int) : WithDepth(3, depth)
 
-    class TopPrioritized(depth: Int) : WithDepth(4, depth)
+    object Member : TowerGroupKind(4)
 
-    object Member : TowerGroupKind(5)
+    class Local(depth: Int) : WithDepth(5, depth)
 
-    class Local(depth: Int) : WithDepth(6, depth)
+    class ImplicitOrNonLocal(depth: Int, val kindForDebugSake: String) : WithDepth(6, depth)
 
-    class ImplicitOrNonLocal(depth: Int, val kindForDebugSake: String) : WithDepth(7, depth)
+    object InvokeExtension : TowerGroupKind(7)
 
-    object InvokeExtension : TowerGroupKind(8)
+    object QualifierValue : TowerGroupKind(8)
-
-    object QualifierValue : TowerGroupKind(9)
 
     object Last : TowerGroupKind(0b1111)
 
@@ -151,8 +149,6 @@ private constructor(
 
         val Start = kindOf(TowerGroupKind.Start)
 
-        val ClassifierPrioritized = kindOf(TowerGroupKind.ClassifierPrioritized)
-
         val Qualifier = kindOf(TowerGroupKind.Qualifier)
 
         val Classifier = kindOf(TowerGroupKind.Classifier)

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirSyntheticCallGenerator.kt

@@ -210,7 +210,6 @@ class FirSyntheticCallGenerator(
         name = name,
         explicitReceiver = null,
         argumentList = argumentList,
-        isPotentialQualifierPart = false,
         isImplicitInvoke = false,
         typeArguments = emptyList(),
         session = session,

idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/resolver/candidateInfoProviders.kt

@@ -10,7 +10,6 @@ import org.jetbrains.kotlin.fir.declarations.FirFile
 import org.jetbrains.kotlin.fir.declarations.FirVariable
 import org.jetbrains.kotlin.fir.resolve.calls.*
 import org.jetbrains.kotlin.fir.resolve.inference.receiverType
-import org.jetbrains.kotlin.fir.symbols.impl.FirVariableSymbol
 import org.jetbrains.kotlin.fir.types.coneType
 import org.jetbrains.kotlin.resolve.calls.tasks.ExplicitReceiverKind
 
@@ -48,7 +47,6 @@ abstract class AbstractCandidateInfoProvider(
             typeArguments = typeArgumentList,
             containingDeclarations = emptyList(), // TODO - maybe we should pass declarations from context here (no visible differences atm)
             containingFile = firFile,
-            isPotentialQualifierPart = false,
             isImplicitInvoke = false,
             session = firSession,
         )