Minor, move IrClass.primaryConstructor to 'ir.tree'

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/IrUtils.kt

@@ -395,9 +395,6 @@ fun IrClass.simpleFunctions() = declarations.flatMap {
     }
 }
 
-val IrClass.primaryConstructor: IrConstructor?
-    get() = constructors.singleOrNull(IrConstructor::isPrimary)
-
 fun IrClass.createParameterDeclarations() {
     assert (thisReceiver == null)
 

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmInlineClassLowering.kt

@@ -8,7 +8,6 @@ package org.jetbrains.kotlin.backend.jvm.lower
 import org.jetbrains.kotlin.backend.common.FileLoweringPass
 import org.jetbrains.kotlin.backend.common.ir.copyParameterDeclarationsFrom
 import org.jetbrains.kotlin.backend.common.ir.passTypeArgumentsFrom
-import org.jetbrains.kotlin.backend.common.ir.primaryConstructor
 import org.jetbrains.kotlin.backend.common.lower.createIrBuilder
 import org.jetbrains.kotlin.backend.common.lower.irBlockBody
 import org.jetbrains.kotlin.backend.common.phaser.makeIrFilePhase
@@ -324,7 +323,7 @@ private class JvmInlineClassLowering(private val context: JvmBackendContext) : F
 
     private fun buildPrimaryInlineClassConstructor(irClass: IrClass, irConstructor: IrConstructor) {
         // Add the default primary constructor
-        val primaryConstructor = irClass.addConstructor {
+        irClass.addConstructor {
             updateFrom(irConstructor)
             visibility = Visibilities.PRIVATE
             origin = JvmLoweredDeclarationOrigin.SYNTHETIC_INLINE_CLASS_MEMBER

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/inlineclasses/InlineClassAbi.kt

@@ -5,7 +5,6 @@
 
 package org.jetbrains.kotlin.backend.jvm.lower.inlineclasses
 
-import org.jetbrains.kotlin.backend.common.ir.primaryConstructor
 import org.jetbrains.kotlin.backend.jvm.ir.erasedUpperBound
 import org.jetbrains.kotlin.codegen.state.md5base64
 import org.jetbrains.kotlin.ir.declarations.*

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/IrUtils.kt

@@ -189,6 +189,9 @@ val IrClassSymbol.constructors: Sequence<IrConstructorSymbol>
 val IrClass.constructors: Sequence<IrConstructor>
     get() = this.declarations.asSequence().filterIsInstance<IrConstructor>()
 
+val IrClass.primaryConstructor: IrConstructor?
+    get() = this.declarations.singleOrNull { it is IrConstructor && it.isPrimary } as IrConstructor?
+
 val IrDeclarationContainer.properties: Sequence<IrProperty>
     get() = declarations.asSequence().filterIsInstance<IrProperty>()