diff --git a/cl/_testgo/errors/out.ll b/cl/_testgo/errors/out.ll
index 2449b613..930efb98 100644
--- a/cl/_testgo/errors/out.ll
+++ b/cl/_testgo/errors/out.ll
@@ -14,21 +14,19 @@ source_filename = "main"
 @"_llgo_iface$Fh8eUJ-Gw4e6TYuajcFIOSCuqSPKAt5nS4ow7xeGXEU" = linkonce global ptr null
 @__llgo_argc = global ptr null
 @__llgo_argv = global ptr null
-@0 = private unnamed_addr constant [5 x i8] c"main\00", align 1
-@1 = private unnamed_addr constant [9 x i8] c"an error\00", align 1
-@2 = private unnamed_addr constant [4 x i8] c"err\00", align 1
+@0 = private unnamed_addr constant [9 x i8] c"an error\00", align 1
 @_llgo_main.errorString = global ptr null
-@3 = private unnamed_addr constant [6 x i8] c"Error\00", align 1
+@1 = private unnamed_addr constant [6 x i8] c"Error\00", align 1
 @"_llgo_func$zNDVRsWTIpUPKouNUS805RGX--IV9qVK8B31IZbg5to" = linkonce global ptr null
-@4 = private unnamed_addr constant [5 x i8] c"main\00", align 1
+@2 = private unnamed_addr constant [5 x i8] c"main\00", align 1
 @"main.struct$QTufDJA9wEDzuzgkA-ZSrLqW-B6lWN8O25mTSglAoLQ" = global ptr null
-@5 = private unnamed_addr constant [6 x i8] c"Error\00", align 1
+@3 = private unnamed_addr constant [6 x i8] c"Error\00", align 1
 @"_llgo_func$8LHAAczeMU-_MsqDJ4-62jHfhzpiOiRnFkBoaL3mfxg" = linkonce global ptr null
-@6 = private unnamed_addr constant [5 x i8] c"main\00", align 1
-@7 = private unnamed_addr constant [17 x i8] c"main.errorString\00", align 1
-@8 = private unnamed_addr constant [2 x i8] c"s\00", align 1
-@9 = private unnamed_addr constant [1 x i8] zeroinitializer, align 1
-@10 = private unnamed_addr constant [5 x i8] c"main\00", align 1
+@4 = private unnamed_addr constant [5 x i8] c"main\00", align 1
+@5 = private unnamed_addr constant [17 x i8] c"main.errorString\00", align 1
+@6 = private unnamed_addr constant [2 x i8] c"s\00", align 1
+@7 = private unnamed_addr constant [1 x i8] zeroinitializer, align 1
+@8 = private unnamed_addr constant [5 x i8] c"main\00", align 1
 
 define %"github.com/goplus/llgo/internal/runtime.iface" @main.New(%"github.com/goplus/llgo/internal/runtime.String" %0) {
 _llgo_0:
@@ -78,41 +76,25 @@ _llgo_0:
   %3 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %2, i32 0, i32 0
   store ptr @0, ptr %3, align 8
   %4 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %2, i32 0, i32 1
-  store i64 4, ptr %4, align 4
+  store i64 8, ptr %4, align 4
   %5 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %2, align 8
-  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %5)
+  %6 = call %"github.com/goplus/llgo/internal/runtime.iface" @main.New(%"github.com/goplus/llgo/internal/runtime.String" %5)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintIface"(%"github.com/goplus/llgo/internal/runtime.iface" %6)
   call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
-  %6 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
-  %7 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %6, i32 0, i32 0
-  store ptr @1, ptr %7, align 8
-  %8 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %6, i32 0, i32 1
-  store i64 8, ptr %8, align 4
-  %9 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %6, align 8
-  %10 = call %"github.com/goplus/llgo/internal/runtime.iface" @main.New(%"github.com/goplus/llgo/internal/runtime.String" %9)
-  %11 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
-  %12 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %11, i32 0, i32 0
-  store ptr @2, ptr %12, align 8
-  %13 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %11, i32 0, i32 1
-  store i64 3, ptr %13, align 4
-  %14 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %11, align 8
-  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %14)
-  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
-  %15 = extractvalue %"github.com/goplus/llgo/internal/runtime.iface" %10, 0
-  %16 = getelementptr ptr, ptr %15, i64 3
-  %17 = load ptr, ptr %16, align 8
-  %18 = extractvalue %"github.com/goplus/llgo/internal/runtime.iface" %10, 1
-  %19 = alloca { ptr, ptr }, align 8
-  %20 = getelementptr inbounds { ptr, ptr }, ptr %19, i32 0, i32 0
-  store ptr %17, ptr %20, align 8
-  %21 = getelementptr inbounds { ptr, ptr }, ptr %19, i32 0, i32 1
-  store ptr %18, ptr %21, align 8
-  %22 = load { ptr, ptr }, ptr %19, align 8
-  %23 = extractvalue { ptr, ptr } %22, 1
-  %24 = extractvalue { ptr, ptr } %22, 0
-  %25 = call %"github.com/goplus/llgo/internal/runtime.String" %24(ptr %23)
-  call void @"github.com/goplus/llgo/internal/runtime.PrintIface"(%"github.com/goplus/llgo/internal/runtime.iface" %10)
-  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 32)
-  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %25)
+  %7 = extractvalue %"github.com/goplus/llgo/internal/runtime.iface" %6, 0
+  %8 = getelementptr ptr, ptr %7, i64 3
+  %9 = load ptr, ptr %8, align 8
+  %10 = extractvalue %"github.com/goplus/llgo/internal/runtime.iface" %6, 1
+  %11 = alloca { ptr, ptr }, align 8
+  %12 = getelementptr inbounds { ptr, ptr }, ptr %11, i32 0, i32 0
+  store ptr %9, ptr %12, align 8
+  %13 = getelementptr inbounds { ptr, ptr }, ptr %11, i32 0, i32 1
+  store ptr %10, ptr %13, align 8
+  %14 = load { ptr, ptr }, ptr %11, align 8
+  %15 = extractvalue { ptr, ptr } %14, 1
+  %16 = extractvalue { ptr, ptr } %14, 0
+  %17 = call %"github.com/goplus/llgo/internal/runtime.String" %16(ptr %15)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %17)
   call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
   ret i32 0
 }
@@ -123,11 +105,11 @@ declare ptr @"github.com/goplus/llgo/internal/runtime.NewItab"(ptr, ptr)
 
 declare void @"github.com/goplus/llgo/internal/runtime.init"()
 
-declare void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String")
+declare void @"github.com/goplus/llgo/internal/runtime.PrintIface"(%"github.com/goplus/llgo/internal/runtime.iface")
 
 declare void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8)
 
-declare void @"github.com/goplus/llgo/internal/runtime.PrintIface"(%"github.com/goplus/llgo/internal/runtime.iface")
+declare void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String")
 
 define void @"main.init$abi"() {
 _llgo_0:
@@ -142,7 +124,7 @@ _llgo_0:
 _llgo_1:                                          ; preds = %_llgo_0
   %4 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %5 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %4, i32 0, i32 0
-  store ptr @3, ptr %5, align 8
+  store ptr @1, ptr %5, align 8
   %6 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %4, i32 0, i32 1
   store i64 5, ptr %6, align 4
   %7 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %4, align 8
@@ -166,7 +148,7 @@ _llgo_1:                                          ; preds = %_llgo_0
   %19 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %15, align 8
   %20 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %21 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %20, i32 0, i32 0
-  store ptr @4, ptr %21, align 8
+  store ptr @2, ptr %21, align 8
   %22 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %20, i32 0, i32 1
   store i64 4, ptr %22, align 4
   %23 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %20, align 8
@@ -190,7 +172,7 @@ _llgo_0:
   %0 = load ptr, ptr @"main.struct$QTufDJA9wEDzuzgkA-ZSrLqW-B6lWN8O25mTSglAoLQ", align 8
   %1 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %2 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %1, i32 0, i32 0
-  store ptr @5, ptr %2, align 8
+  store ptr @3, ptr %2, align 8
   %3 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %1, i32 0, i32 1
   store i64 5, ptr %3, align 4
   %4 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %1, align 8
@@ -218,13 +200,13 @@ _llgo_0:
   %18 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %14, align 8
   %19 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %20 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %19, i32 0, i32 0
-  store ptr @6, ptr %20, align 8
+  store ptr @4, ptr %20, align 8
   %21 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %19, i32 0, i32 1
   store i64 4, ptr %21, align 4
   %22 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %19, align 8
   %23 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %24 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %23, i32 0, i32 0
-  store ptr @7, ptr %24, align 8
+  store ptr @5, ptr %24, align 8
   %25 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %23, i32 0, i32 1
   store i64 16, ptr %25, align 4
   %26 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %23, align 8
@@ -274,21 +256,21 @@ define void @"main.init$abi3"() {
 _llgo_0:
   %0 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %1 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %0, i32 0, i32 0
-  store ptr @8, ptr %1, align 8
+  store ptr @6, ptr %1, align 8
   %2 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %0, i32 0, i32 1
   store i64 1, ptr %2, align 4
   %3 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %0, align 8
   %4 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 24)
   %5 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %6 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %5, i32 0, i32 0
-  store ptr @9, ptr %6, align 8
+  store ptr @7, ptr %6, align 8
   %7 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %5, i32 0, i32 1
   store i64 0, ptr %7, align 4
   %8 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %5, align 8
   %9 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %3, ptr %4, i64 0, %"github.com/goplus/llgo/internal/runtime.String" %8, i1 false)
   %10 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %11 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %10, i32 0, i32 0
-  store ptr @10, ptr %11, align 8
+  store ptr @8, ptr %11, align 8
   %12 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %10, i32 0, i32 1
   store i64 4, ptr %12, align 4
   %13 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %10, align 8