diff --git a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/Ir.kt b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/Ir.kt
index 25dc9d83bab..3cedcfde7cc 100644
--- a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/Ir.kt
+++ b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/Ir.kt
@@ -12,7 +12,6 @@ import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.SimpleFunctionDescriptor
 import org.jetbrains.kotlin.descriptors.findClassAcrossModuleDependencies
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
-import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
 import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 import org.jetbrains.kotlin.ir.declarations.IrPackageFragment
@@ -111,9 +110,6 @@ open class BuiltinSymbolsBase(protected val irBuiltIns: IrBuiltIns, protected va
     val longProgression = progression("LongProgression")
     val progressionClasses = listOfNotNull(charProgression, intProgression, longProgression, uIntProgression, uLongProgression)
 
-    @ObsoleteDescriptorBasedAPI
-    val progressionClassesTypes = progressionClasses.map { it.descriptor.defaultType }.toSet()
-
     val getProgressionLastElementByReturnType = builtInsPackage("kotlin", "internal")
         .getContributedFunctions(Name.identifier("getProgressionLastElement"), NoLookupLocation.FROM_BACKEND)
         .filter { it.containingDeclaration !is BuiltInsPackageFragment }
@@ -155,9 +151,6 @@ open class BuiltinSymbolsBase(protected val irBuiltIns: IrBuiltIns, protected va
 
     val integerClasses = listOf(byte, short, int, long)
 
-    @ObsoleteDescriptorBasedAPI
-    val integerClassesTypes = integerClasses.map { it.descriptor.defaultType }
-
     val arrayOf = getSimpleFunction(Name.identifier("arrayOf")) {
         it.extensionReceiverParameter == null && it.dispatchReceiverParameter == null && it.valueParameters.size == 1 &&
                 it.valueParameters[0].isVararg
diff --git a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/loops/ProgressionType.kt b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/loops/ProgressionType.kt
index 8e933751237..db1d41970a7 100644
--- a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/loops/ProgressionType.kt
+++ b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/loops/ProgressionType.kt
@@ -10,7 +10,6 @@ package org.jetbrains.kotlin.backend.common.lower.loops
 import org.jetbrains.kotlin.backend.common.CommonBackendContext
 import org.jetbrains.kotlin.backend.common.ir.Symbols
 import org.jetbrains.kotlin.backend.common.lower.DeclarationIrBuilder
-import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
 import org.jetbrains.kotlin.ir.builders.irChar
 import org.jetbrains.kotlin.ir.builders.irInt
 import org.jetbrains.kotlin.ir.builders.irLong
@@ -190,7 +189,6 @@ internal abstract class UnsignedProgressionType(
     }
 }
 
-@OptIn(ObsoleteDescriptorBasedAPI::class)
 internal class UIntProgressionType(symbols: Symbols<CommonBackendContext>) :
     UnsignedProgressionType(
         symbols,
@@ -208,7 +206,6 @@ internal class UIntProgressionType(symbols: Symbols<CommonBackendContext>) :
     override fun DeclarationIrBuilder.zeroStepExpression() = irInt(0)
 }
 
-@OptIn(ObsoleteDescriptorBasedAPI::class)
 internal class ULongProgressionType(symbols: Symbols<CommonBackendContext>) :
     UnsignedProgressionType(
         symbols,
diff --git a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/loops/handlers/ReversedHandler.kt b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/loops/handlers/ReversedHandler.kt
index 3c9e18faa0e..b0aaf0f08d4 100644
--- a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/loops/handlers/ReversedHandler.kt
+++ b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/loops/handlers/ReversedHandler.kt
@@ -10,18 +10,16 @@ import org.jetbrains.kotlin.backend.common.lower.loops.HeaderInfoBuilder
 import org.jetbrains.kotlin.backend.common.lower.loops.HeaderInfoFromCallHandler
 import org.jetbrains.kotlin.backend.common.lower.matchers.Quantifier
 import org.jetbrains.kotlin.backend.common.lower.matchers.createIrCallMatcher
-import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
 import org.jetbrains.kotlin.ir.expressions.IrCall
 import org.jetbrains.kotlin.ir.symbols.IrSymbol
-import org.jetbrains.kotlin.ir.types.toKotlinType
+import org.jetbrains.kotlin.ir.types.defaultType
 import org.jetbrains.kotlin.name.FqName
 
 /** Builds a [HeaderInfo] for calls to reverse an iterable. */
-@OptIn(ObsoleteDescriptorBasedAPI::class)
 internal class ReversedHandler(context: CommonBackendContext, private val visitor: HeaderInfoBuilder) :
     HeaderInfoFromCallHandler<Nothing?> {
 
-    private val symbols = context.ir.symbols
+    private val progressionClassesTypes = context.ir.symbols.progressionClasses.map { it.defaultType }.toSet()
 
     // Use Quantifier.ANY so we can handle all reversed iterables in the same manner.
     override val matcher =
@@ -29,7 +27,7 @@ internal class ReversedHandler(context: CommonBackendContext, private val visito
             // Matcher for reversed progression.
             callee {
                 fqName { it == FqName("kotlin.ranges.reversed") }
-                extensionReceiver { it != null && it.type.toKotlinType() in symbols.progressionClassesTypes }
+                extensionReceiver { it != null && it.type in progressionClassesTypes }
                 parameterCount { it == 0 }
             }