Use AnnotationDescriptor.fqName instead of type

Also use the annotationClass extension property instead of
TypeUtils.getClassDescriptor(annotation.type)

compiler/frontend/src/org/jetbrains/kotlin/resolve/AnnotationChecker.kt

@@ -35,7 +35,6 @@ import org.jetbrains.kotlin.resolve.descriptorUtil.getAnnotationRetention
 import org.jetbrains.kotlin.resolve.descriptorUtil.isRepeatableAnnotation
 import org.jetbrains.kotlin.resolve.inline.InlineUtil
 import org.jetbrains.kotlin.types.KotlinType
-import org.jetbrains.kotlin.types.TypeUtils
 import org.jetbrains.kotlin.types.expressions.ExpressionTypingUtils
 import org.jetbrains.kotlin.types.isError
 
@@ -107,7 +106,7 @@ class AnnotationChecker(private val additionalCheckers: Iterable<AdditionalAnnot
         for (entry in entries) {
             checkAnnotationEntry(entry, actualTargets, trace)
             val descriptor = trace.get(BindingContext.ANNOTATION, entry) ?: continue
-            val classDescriptor = TypeUtils.getClassDescriptor(descriptor.type) ?: continue
+            val classDescriptor = descriptor.annotationClass ?: continue
 
             val useSiteTarget = entry.useSiteTarget?.getAnnotationUseSiteTarget() ?: annotated.getDefaultUseSiteTarget(descriptor)
             val existingTargetsForAnnotation = entryTypesWithAnnotations.getOrPut(descriptor.type) { arrayListOf() }
@@ -169,8 +168,7 @@ class AnnotationChecker(private val additionalCheckers: Iterable<AdditionalAnnot
             val descriptor = trace.get(BindingContext.ANNOTATION, entry) ?: return KotlinTarget.DEFAULT_TARGET_SET
             // For descriptor with error type, all targets are considered as possible
             if (descriptor.type.isError) return KotlinTarget.ALL_TARGET_SET
-            val classDescriptor = TypeUtils.getClassDescriptor(descriptor.type) ?: return KotlinTarget.DEFAULT_TARGET_SET
-            return applicableTargetSet(classDescriptor) ?: KotlinTarget.DEFAULT_TARGET_SET
+            return descriptor.annotationClass?.let(this::applicableTargetSet) ?: KotlinTarget.DEFAULT_TARGET_SET
         }
 
         @JvmStatic fun applicableTargetSet(descriptor: AnnotationDescriptor): Set<KotlinTarget> {

compiler/frontend/src/org/jetbrains/kotlin/resolve/TypeAliasExpander.kt

@@ -142,10 +142,10 @@ class TypeAliasExpander(
     }
 
     private fun checkRepeatedAnnotations(existingAnnotations: Annotations, newAnnotations: Annotations) {
-        val existingAnnotationTypes = existingAnnotations.mapTo(hashSetOf()) { it.type }
+        val existingAnnotationFqNames = existingAnnotations.mapTo(hashSetOf()) { it.fqName }
 
         for (annotation in newAnnotations) {
-            if (annotation.type in existingAnnotationTypes) {
+            if (annotation.fqName in existingAnnotationFqNames) {
                 reportStrategy.repeatedAnnotation(annotation)
             }
         }

compiler/frontend/src/org/jetbrains/kotlin/resolve/checkers/PublishedApiUsageChecker.kt

@@ -25,27 +25,22 @@ import org.jetbrains.kotlin.diagnostics.Errors
 import org.jetbrains.kotlin.psi.KtDeclaration
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.BindingTrace
-import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameSafe
-import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameUnsafe
-import org.jetbrains.kotlin.types.TypeUtils
 
 object PublishedApiUsageChecker {
-
     fun check(
             declaration: KtDeclaration,
             descriptor: DeclarationDescriptor,
             trace: BindingTrace
     ) {
         if (descriptor !is DeclarationDescriptorWithVisibility || descriptor.visibility == Visibilities.INTERNAL) return
-        /*Don't report diagnostic twise*/
+        // Don't report the diagnostic twice
         if (descriptor is PropertyAccessorDescriptor) return
 
         for (entry in declaration.annotationEntries) {
             val annotationDescriptor = trace.get(BindingContext.ANNOTATION, entry) ?: continue
-            val classDescriptor = TypeUtils.getClassDescriptor(annotationDescriptor.type) ?: continue
-            if (classDescriptor.fqNameSafe == KotlinBuiltIns.FQ_NAMES.publishedApi) {
+            if (annotationDescriptor.fqName == KotlinBuiltIns.FQ_NAMES.publishedApi) {
                 trace.report(Errors.NON_INTERNAL_PUBLISHED_API.on(entry))
             }
         }
     }
-}
+}

compiler/frontend/src/org/jetbrains/kotlin/resolve/diagnostics/KotlinSuppressCache.kt

@@ -171,7 +171,7 @@ abstract class KotlinSuppressCache {
             builder.addAll(suppressStringProvider[annotationDescriptor])
         }
 
-        if (!KotlinBuiltIns.isSuppressAnnotation(annotationDescriptor)) return
+        if (annotationDescriptor.fqName != KotlinBuiltIns.FQ_NAMES.suppress) return
 
         // We only add strings and skip other values to facilitate recovery in presence of erroneous code
         for (arrayValue in annotationDescriptor.allValueArguments.values) {

compiler/frontend/src/org/jetbrains/kotlin/resolve/diagnostics/SuppressDiagnosticsByAnnotations.kt

@@ -16,17 +16,12 @@
 
 package org.jetbrains.kotlin.resolve.diagnostics
 
+import org.jetbrains.kotlin.descriptors.SimpleFunctionDescriptor
 import org.jetbrains.kotlin.descriptors.annotations.AnnotationDescriptor
-import org.jetbrains.kotlin.diagnostics.Errors
-import org.jetbrains.kotlin.resolve.DescriptorUtils
-import org.jetbrains.kotlin.diagnostics.Diagnostic
-import org.jetbrains.kotlin.diagnostics.DiagnosticFactory
+import org.jetbrains.kotlin.diagnostics.*
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.psi.KtFunction
-import org.jetbrains.kotlin.descriptors.SimpleFunctionDescriptor
-import org.jetbrains.kotlin.diagnostics.DiagnosticFactory1
 import org.jetbrains.kotlin.psi.KtProperty
-import org.jetbrains.kotlin.diagnostics.DiagnosticFactory0
 
 val FUNCTION_NO_BODY_ERRORS: List<DiagnosticFactory1<KtFunction, SimpleFunctionDescriptor>> =
         listOf(Errors.NON_ABSTRACT_FUNCTION_WITH_NO_BODY, Errors.NON_MEMBER_FUNCTION_NO_BODY)
@@ -36,18 +31,13 @@ val PROPERTY_NOT_INITIALIZED_ERRORS: List<DiagnosticFactory0<KtProperty>> =
 
 abstract class SuppressDiagnosticsByAnnotations(
         diagnosticsToSuppress: List<DiagnosticFactory<out Diagnostic>>,
-        vararg annotationsFqName: FqName
+        vararg annotationFqNames: FqName
 ) : SuppressStringProvider {
 
     private val stringsToSuppress = diagnosticsToSuppress.map { it.name.toLowerCase() }
-    private val expectedFqNames = annotationsFqName.map(FqName::toString)
+    private val expectedFqNames = annotationFqNames.toSet()
 
     override fun get(annotationDescriptor: AnnotationDescriptor): List<String> {
-        val descriptor = DescriptorUtils.getClassDescriptorForType(annotationDescriptor.type)
-        val actualFqName = DescriptorUtils.getFqName(descriptor).asString()
-
-        if (expectedFqNames.any { it == actualFqName }) return stringsToSuppress
-
-        return listOf()
+        return if (annotationDescriptor.fqName in expectedFqNames) stringsToSuppress else emptyList()
     }
 }

compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/descriptors/LazyAnnotations.kt

@@ -23,7 +23,10 @@ import org.jetbrains.kotlin.descriptors.annotations.Annotations
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.KtAnnotationEntry
-import org.jetbrains.kotlin.resolve.*
+import org.jetbrains.kotlin.resolve.AnnotationResolver
+import org.jetbrains.kotlin.resolve.AnnotationResolverImpl
+import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.resolve.BindingTrace
 import org.jetbrains.kotlin.resolve.constants.ConstantValue
 import org.jetbrains.kotlin.resolve.lazy.ForceResolveUtil
 import org.jetbrains.kotlin.resolve.lazy.LazyEntity
@@ -31,7 +34,6 @@ import org.jetbrains.kotlin.resolve.scopes.LexicalScope
 import org.jetbrains.kotlin.resolve.source.toSourceElement
 import org.jetbrains.kotlin.storage.StorageManager
 import org.jetbrains.kotlin.storage.getValue
-import org.jetbrains.kotlin.types.isError
 
 abstract class LazyAnnotationsContext(
         val annotationResolver: AnnotationResolver,
@@ -62,22 +64,7 @@ class LazyAnnotations(
         AnnotationWithTarget(descriptor, target)
     }
 
-    override fun findAnnotation(fqName: FqName): AnnotationDescriptor? {
-        // We can not efficiently check short names here:
-        // an annotation class may be renamed on import
-        for (annotationDescriptor in iterator()) {
-            val annotationType = annotationDescriptor.type
-            if (annotationType.isError) continue
-
-            val descriptor = annotationType.constructor.declarationDescriptor ?: continue
-
-            if (DescriptorUtils.getFqNameSafe(descriptor) == fqName) {
-                return annotationDescriptor
-            }
-        }
-
-        return null
-    }
+    override fun findAnnotation(fqName: FqName): AnnotationDescriptor? = firstOrNull { it.fqName == fqName }
 
     override fun getUseSiteTargetedAnnotations(): List<AnnotationWithTarget> {
         return annotationEntries