IR: make IrGetValue.copyWithOffsets an extension function

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/inline/FunctionInlining.kt

@@ -662,9 +662,6 @@ class FunctionInlining(
 
         fun withLocation(startOffset: Int, endOffset: Int) =
             IrGetValueImpl(startOffset, endOffset, type, symbol, origin)
-
-        override fun copyWithOffsets(newStartOffset: Int, newEndOffset: Int): IrGetValue =
-            withLocation(newStartOffset, newEndOffset)
     }
 }
 

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/IrGetValue.kt

@@ -8,8 +8,6 @@ package org.jetbrains.kotlin.ir.expressions
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 
 abstract class IrGetValue : IrValueAccessExpression() {
-    abstract fun copyWithOffsets(newStartOffset: Int, newEndOffset: Int): IrGetValue
-
     override fun <R, D> accept(visitor: IrElementVisitor<R, D>, data: D): R =
         visitor.visitGetValue(this, data)
 }

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/impl/IrGetValueImpl.kt

@@ -23,7 +23,7 @@ class IrGetValueImpl(
         symbol: IrValueSymbol,
         origin: IrStatementOrigin? = null
     ) : this(startOffset, endOffset, symbol.owner.type, symbol, origin)
-
-    override fun copyWithOffsets(newStartOffset: Int, newEndOffset: Int): IrGetValue =
-        IrGetValueImpl(newStartOffset, newEndOffset, type, symbol, origin)
 }
+
+fun IrGetValue.copyWithOffsets(newStartOffset: Int, newEndOffset: Int): IrGetValue =
+    IrGetValueImpl(newStartOffset, newEndOffset, type, symbol, origin)