K2 Scripting: add FIR2IR conversion for FirScript

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/impl/IrScriptImpl.kt

@@ -24,9 +24,9 @@ class IrScriptImpl(
     override val symbol: IrScriptSymbol,
     override var name: Name,
     override val factory: IrFactory,
+    override val startOffset: Int,
+    override val endOffset: Int,
 ) : IrScript() {
-    override val startOffset: Int get() = UNDEFINED_OFFSET
-    override val endOffset: Int get() = UNDEFINED_OFFSET
     override var origin: IrDeclarationOrigin = SCRIPT_ORIGIN
 
     private var _parent: IrDeclarationParent? = null

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

@@ -127,6 +127,8 @@ open class DeepCopyIrTreeWithSymbols(
             symbolRemapper.getDeclaredScript(declaration.symbol),
             declaration.name,
             declaration.factory,
+            declaration.startOffset,
+            declaration.endOffset
         ).also { scriptCopy ->
             scriptCopy.thisReceiver = declaration.thisReceiver.transform()
             declaration.statements.mapTo(scriptCopy.statements) { it.transform() }

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

@@ -429,9 +429,11 @@ open class SymbolTable(
 
     @ObsoleteDescriptorBasedAPI
     fun declareScript(
+        startOffset: Int,
+        endOffset: Int,
         descriptor: ScriptDescriptor,
         scriptFactory: (IrScriptSymbol) -> IrScript = { symbol: IrScriptSymbol ->
-            IrScriptImpl(symbol, nameProvider.nameForDeclaration(descriptor), irFactory)
+            IrScriptImpl(symbol, nameProvider.nameForDeclaration(descriptor), irFactory, startOffset, endOffset)
         }
     ): IrScript {
         return scriptSymbolTable.declare(
@@ -441,6 +443,18 @@ open class SymbolTable(
         )
     }
 
+    fun declareScript(
+        sig: IdSignature,
+        symbolFactory: () -> IrScriptSymbol,
+        scriptFactory: (IrScriptSymbol) -> IrScript
+    ): IrScript {
+        return scriptSymbolTable.declare(
+            sig,
+            symbolFactory,
+            scriptFactory
+        )
+    }
+
     @ObsoleteDescriptorBasedAPI
     override fun referenceScript(descriptor: ScriptDescriptor): IrScriptSymbol =
         scriptSymbolTable.referenced(descriptor) { IrScriptSymbolImpl(descriptor) }