[Native] Simplify irCatch from IrUtils2

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/EntryPoint.kt

@@ -64,7 +64,7 @@ internal fun makeEntryPoint(generationState: NativeGenerationState): IrFunction
                 }
                 +irReturn(irInt(0))
             }
-            catches += irCatch(context.irBuiltIns.throwableType).apply {
+            catches += irCatch().apply {
                 result = irBlock {
                     +irCall(context.ir.symbols.processUnhandledException).apply {
                         putValueArgument(0, irGet(catchParameter))

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/cgen/CBridgeGenUtils.kt

@@ -225,7 +225,7 @@ internal class KotlinCallBuilder(private val irBuilder: IrBuilderWithScope, priv
                     // Note: generating try-catch as finally blocks are already lowered.
                     val result = irTemporary(IrTryImpl(startOffset, endOffset, kotlinCall.type).apply {
                         tryResult = kotlinCall
-                        catches += irCatch(context.irBuiltIns.throwableType).apply {
+                        catches += irCatch().apply {
                             result = irBlock(kotlinCall) {
                                 cleanup.forEach { +it() }
                                 +irThrow(irGet(catchParameter))

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/util/IrUtils2.kt

@@ -9,18 +9,16 @@ import org.jetbrains.kotlin.backend.konan.KonanBackendContext
 import org.jetbrains.kotlin.backend.konan.descriptors.synthesizedName
 import org.jetbrains.kotlin.backend.konan.ir.buildSimpleAnnotation
 import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
-import org.jetbrains.kotlin.descriptors.ParameterDescriptor
 import org.jetbrains.kotlin.descriptors.impl.PackageFragmentDescriptorImpl
 import org.jetbrains.kotlin.ir.IrFileEntry
 import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
 import org.jetbrains.kotlin.ir.builders.IrBuilderWithScope
+import org.jetbrains.kotlin.ir.builders.declarations.buildVariable
 import org.jetbrains.kotlin.ir.builders.irCall
 import org.jetbrains.kotlin.ir.builders.parent
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.declarations.impl.IrFieldImpl
 import org.jetbrains.kotlin.ir.declarations.impl.IrFileImpl
-import org.jetbrains.kotlin.ir.declarations.impl.IrValueParameterImpl
-import org.jetbrains.kotlin.ir.declarations.impl.IrVariableImpl
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.IrCallImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrCatchImpl
@@ -28,8 +26,6 @@ import org.jetbrains.kotlin.ir.expressions.impl.IrConstImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrExpressionBodyImpl
 import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
 import org.jetbrains.kotlin.ir.symbols.impl.IrFieldSymbolImpl
-import org.jetbrains.kotlin.ir.symbols.impl.IrValueParameterSymbolImpl
-import org.jetbrains.kotlin.ir.symbols.impl.IrVariableSymbolImpl
 import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.types.classifierOrFail
 import org.jetbrains.kotlin.ir.types.makeNullable
@@ -131,22 +127,20 @@ internal fun irCall(startOffset: Int, endOffset: Int, irFunction: IrSimpleFuncti
             }
         }
 
-fun IrBuilderWithScope.irCatch(type: IrType) =
+fun IrBuilderWithScope.irCatch() =
         IrCatchImpl(
                 startOffset, endOffset,
-                IrVariableImpl(
+                buildVariable(
+                        this@irCatch.parent,
                         startOffset,
                         endOffset,
                         IrDeclarationOrigin.IR_TEMPORARY_VARIABLE,
-                        IrVariableSymbolImpl(),
                         Name.identifier("e"),
-                        type,
+                        context.irBuiltIns.throwableType,
-                        false,
+                        isVar = false,
-                        false,
+                        isConst = false,
-                        false
+                        isLateinit = false
-                ).apply {
+                )
-                    parent = this@irCatch.parent
-                }
         )
 
 fun IrClass.defaultOrNullableType(hasQuestionMark: Boolean) =