LOGGER: dump ir to string (partly)

(cherry picked from commit 674f32e46c78dac18877497651f6b27e1eed1dcc)

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/Logger.kt

@@ -29,13 +29,18 @@ internal class Logger(val generator: CodeGenerator, override val context: Contex
 
 //-----------------------------------------------------------------------------//
 
-fun ir2string(ir: IrElement?): String {
+fun ir2string(ir: IrElement?): String = ir2stringWhole(ir).takeWhile { it != '\n' }
+
+//-----------------------------------------------------------------------------//
+
+fun ir2stringWhole(ir: IrElement?): String {
   val strWriter = StringWriter()
 
   ir?.accept(DumpIrTreeVisitor(strWriter), "")
-  return strWriter.toString().takeWhile { it != '\n' }
+  return strWriter.toString()
 }
 
+
 //-----------------------------------------------------------------------------//
 
 fun llvm2string(value: LLVMValueRef?): String {