diff --git a/cl/_testgo/strucintf/out.ll b/cl/_testgo/strucintf/out.ll
index 07c3ac59..9e09848f 100644
--- a/cl/_testgo/strucintf/out.ll
+++ b/cl/_testgo/strucintf/out.ll
@@ -3,8 +3,7 @@ source_filename = "main"
 
 %"github.com/goplus/llgo/internal/runtime.eface" = type { ptr, ptr }
 %"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 }
-%"github.com/goplus/llgo/internal/abi.StructField" = type { %"github.com/goplus/llgo/internal/abi.Name", ptr, i64 }
-%"github.com/goplus/llgo/internal/abi.Name" = type { ptr }
+%"github.com/goplus/llgo/internal/abi.StructField" = type { %"github.com/goplus/llgo/internal/runtime.String", ptr, i64, %"github.com/goplus/llgo/internal/runtime.String", i1 }
 %"github.com/goplus/llgo/internal/runtime.Slice" = type { ptr, i64, i64 }
 
 @"main.init$guard" = global ptr null
@@ -270,14 +269,14 @@ _llgo_0:
   %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, i1 false)
+  %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 @5, 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
-  %14 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 24)
+  %14 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 56)
   %15 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %14, i64 0
   store %"github.com/goplus/llgo/internal/abi.StructField" %9, ptr %15, align 8
   %16 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
@@ -288,7 +287,7 @@ _llgo_0:
   %19 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %16, i32 0, i32 2
   store i64 1, ptr %19, align 4
   %20 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %16, align 8
-  %21 = call ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String" %13, %"github.com/goplus/llgo/internal/runtime.Slice" %20)
+  %21 = call ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String" %13, i64 8, %"github.com/goplus/llgo/internal/runtime.Slice" %20)
   store ptr %21, ptr @"main.struct$MYpsoM99ZwFY087IpUOkIw1zjBA_sgFXVodmn1m-G88", align 8
   %22 = load ptr, ptr @"_llgo_struct$K-dZ9QotZfVPz2a0YdRa9vmZUuDXPTqZOlMShKEDJtk", align 8
   %23 = icmp eq ptr %22, null
@@ -308,14 +307,14 @@ _llgo_1:                                          ; preds = %_llgo_0
   %31 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %29, i32 0, i32 1
   store i64 0, ptr %31, align 4
   %32 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %29, align 8
-  %33 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %27, ptr %28, i64 0, %"github.com/goplus/llgo/internal/runtime.String" %32, i1 true, i1 false)
+  %33 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %27, ptr %28, i64 0, %"github.com/goplus/llgo/internal/runtime.String" %32, i1 false)
   %34 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %35 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %34, i32 0, i32 0
   store ptr @8, ptr %35, align 8
   %36 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %34, i32 0, i32 1
   store i64 4, ptr %36, align 4
   %37 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %34, align 8
-  %38 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 24)
+  %38 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 56)
   %39 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %38, i64 0
   store %"github.com/goplus/llgo/internal/abi.StructField" %33, ptr %39, align 8
   %40 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
@@ -326,7 +325,7 @@ _llgo_1:                                          ; preds = %_llgo_0
   %43 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %40, i32 0, i32 2
   store i64 1, ptr %43, align 4
   %44 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %40, align 8
-  %45 = call ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String" %37, %"github.com/goplus/llgo/internal/runtime.Slice" %44)
+  %45 = call ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String" %37, i64 8, %"github.com/goplus/llgo/internal/runtime.Slice" %44)
   store ptr %45, ptr @"_llgo_struct$K-dZ9QotZfVPz2a0YdRa9vmZUuDXPTqZOlMShKEDJtk", align 8
   br label %_llgo_2
 
@@ -334,9 +333,9 @@ _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
   ret void
 }
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Struct"(i64, %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+declare ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String", i64, %"github.com/goplus/llgo/internal/runtime.Slice")
 
-declare %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String", ptr, i64, %"github.com/goplus/llgo/internal/runtime.String", i1, i1)
+declare %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String", ptr, i64, %"github.com/goplus/llgo/internal/runtime.String", i1)
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64)
 
diff --git a/cl/_testgo/struczero/in.go b/cl/_testgo/struczero/in.go
index 589b75f2..ce583d11 100644
--- a/cl/_testgo/struczero/in.go
+++ b/cl/_testgo/struczero/in.go
@@ -20,6 +20,7 @@ func Bar(v any) (ret foo.Foo, ok bool) {
 func main() {
 	ret, ok := Foo(nil)
 	println(ret.pb, ret.f, "notOk:", !ok)
+
 	ret2, ok2 := Bar(foo.Foo{})
 	println(ret2.Pb(), ret2.F, ok2)
 }
diff --git a/cl/_testgo/struczero/out.ll b/cl/_testgo/struczero/out.ll
index 60b85986..8299781b 100644
--- a/cl/_testgo/struczero/out.ll
+++ b/cl/_testgo/struczero/out.ll
@@ -5,8 +5,7 @@ source_filename = "main"
 %"github.com/goplus/llgo/internal/runtime.eface" = type { ptr, ptr }
 %main.bar = type { ptr, float }
 %"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 }
-%"github.com/goplus/llgo/internal/abi.StructField" = type { %"github.com/goplus/llgo/internal/abi.Name", ptr, i64 }
-%"github.com/goplus/llgo/internal/abi.Name" = type { ptr }
+%"github.com/goplus/llgo/internal/abi.StructField" = type { %"github.com/goplus/llgo/internal/runtime.String", ptr, i64, %"github.com/goplus/llgo/internal/runtime.String", i1 }
 %"github.com/goplus/llgo/internal/runtime.Slice" = type { ptr, i64, i64 }
 
 @"main.init$guard" = global ptr null
@@ -21,13 +20,15 @@ source_filename = "main"
 @3 = private unnamed_addr constant [2 x i8] c"F\00", align 1
 @4 = private unnamed_addr constant [1 x i8] zeroinitializer, align 1
 @5 = private unnamed_addr constant [5 x i8] c"main\00", align 1
-@6 = private unnamed_addr constant [43 x i8] c"github.com/goplus/llgo/cl/internal/foo.Foo\00", align 1
-@7 = private unnamed_addr constant [3 x i8] c"pb\00", align 1
-@8 = private unnamed_addr constant [1 x i8] zeroinitializer, align 1
-@9 = private unnamed_addr constant [2 x i8] c"f\00", align 1
-@10 = private unnamed_addr constant [1 x i8] zeroinitializer, align 1
-@11 = private unnamed_addr constant [5 x i8] c"main\00", align 1
-@12 = private unnamed_addr constant [9 x i8] c"main.bar\00", align 1
+@6 = private unnamed_addr constant [5 x i8] c"main\00", align 1
+@7 = private unnamed_addr constant [43 x i8] c"github.com/goplus/llgo/cl/internal/foo.Foo\00", align 1
+@8 = private unnamed_addr constant [3 x i8] c"pb\00", align 1
+@9 = private unnamed_addr constant [1 x i8] zeroinitializer, align 1
+@10 = private unnamed_addr constant [2 x i8] c"f\00", align 1
+@11 = private unnamed_addr constant [1 x i8] zeroinitializer, align 1
+@12 = private unnamed_addr constant [5 x i8] c"main\00", align 1
+@13 = private unnamed_addr constant [5 x i8] c"main\00", align 1
+@14 = private unnamed_addr constant [9 x i8] c"main.bar\00", align 1
 
 define { %"github.com/goplus/llgo/cl/internal/foo.Foo", i1 } @main.Bar(%"github.com/goplus/llgo/internal/runtime.eface" %0) {
 _llgo_0:
@@ -217,7 +218,7 @@ _llgo_1:                                          ; preds = %_llgo_0
   %9 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %7, i32 0, i32 1
   store i64 0, ptr %9, align 4
   %10 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %7, align 8
-  %11 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %5, ptr %6, i64 0, %"github.com/goplus/llgo/internal/runtime.String" %10, i1 false, i1 false)
+  %11 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %5, ptr %6, i64 0, %"github.com/goplus/llgo/internal/runtime.String" %10, i1 false)
   %12 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %13 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %12, i32 0, i32 0
   store ptr @3, ptr %13, align 8
@@ -231,14 +232,14 @@ _llgo_1:                                          ; preds = %_llgo_0
   %19 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %17, i32 0, i32 1
   store i64 0, ptr %19, align 4
   %20 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %17, align 8
-  %21 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %15, ptr %16, i64 8, %"github.com/goplus/llgo/internal/runtime.String" %20, i1 true, i1 false)
+  %21 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %15, ptr %16, i64 8, %"github.com/goplus/llgo/internal/runtime.String" %20, i1 false)
   %22 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %23 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %22, i32 0, i32 0
   store ptr @5, ptr %23, align 8
   %24 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %22, i32 0, i32 1
   store i64 4, ptr %24, align 4
   %25 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %22, align 8
-  %26 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 48)
+  %26 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 112)
   %27 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %26, i64 0
   store %"github.com/goplus/llgo/internal/abi.StructField" %11, ptr %27, align 8
   %28 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %26, i64 1
@@ -251,81 +252,93 @@ _llgo_1:                                          ; preds = %_llgo_0
   %32 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %29, i32 0, i32 2
   store i64 2, ptr %32, align 4
   %33 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %29, align 8
-  %34 = call ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String" %25, %"github.com/goplus/llgo/internal/runtime.Slice" %33)
+  %34 = call ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String" %25, i64 16, %"github.com/goplus/llgo/internal/runtime.Slice" %33)
   %35 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
   %36 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %35, i32 0, i32 0
   store ptr @6, ptr %36, align 8
   %37 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %35, i32 0, i32 1
-  store i64 42, ptr %37, align 4
+  store i64 4, ptr %37, align 4
   %38 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %35, align 8
-  %39 = call ptr @"github.com/goplus/llgo/internal/runtime.Named"(%"github.com/goplus/llgo/internal/runtime.String" %38, ptr %34)
-  store ptr %39, ptr @"github.com/goplus/llgo/cl/internal/foo.Foo", align 8
+  %39 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %40 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %39, i32 0, i32 0
+  store ptr @7, ptr %40, align 8
+  %41 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %39, i32 0, i32 1
+  store i64 42, ptr %41, align 4
+  %42 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %39, align 8
+  %43 = call ptr @"github.com/goplus/llgo/internal/runtime.Named"(%"github.com/goplus/llgo/internal/runtime.String" %38, %"github.com/goplus/llgo/internal/runtime.String" %42, ptr %34, { ptr, i64, i64 } zeroinitializer)
+  store ptr %43, ptr @"github.com/goplus/llgo/cl/internal/foo.Foo", align 8
   br label %_llgo_2
 
 _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
-  %40 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
-  %41 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %40, i32 0, i32 0
-  store ptr @7, ptr %41, align 8
-  %42 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %40, i32 0, i32 1
-  store i64 2, ptr %42, align 4
-  %43 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %40, align 8
-  %44 = load ptr, ptr @"*_llgo_byte", align 8
-  %45 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
-  %46 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %45, i32 0, i32 0
-  store ptr @8, ptr %46, align 8
-  %47 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %45, i32 0, i32 1
-  store i64 0, ptr %47, align 4
-  %48 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %45, align 8
-  %49 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %43, ptr %44, i64 0, %"github.com/goplus/llgo/internal/runtime.String" %48, i1 false, i1 false)
-  %50 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
-  %51 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %50, i32 0, i32 0
-  store ptr @9, ptr %51, align 8
-  %52 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %50, i32 0, i32 1
-  store i64 1, ptr %52, align 4
-  %53 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %50, align 8
-  %54 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 13)
-  %55 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
-  %56 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %55, i32 0, i32 0
-  store ptr @10, ptr %56, align 8
-  %57 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %55, i32 0, i32 1
-  store i64 0, ptr %57, align 4
-  %58 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %55, align 8
-  %59 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %53, ptr %54, i64 8, %"github.com/goplus/llgo/internal/runtime.String" %58, i1 false, i1 false)
-  %60 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
-  %61 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %60, i32 0, i32 0
-  store ptr @11, ptr %61, align 8
-  %62 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %60, i32 0, i32 1
-  store i64 4, ptr %62, align 4
-  %63 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %60, align 8
-  %64 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 48)
-  %65 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %64, i64 0
-  store %"github.com/goplus/llgo/internal/abi.StructField" %49, ptr %65, align 8
-  %66 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %64, i64 1
-  store %"github.com/goplus/llgo/internal/abi.StructField" %59, ptr %66, align 8
-  %67 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
-  %68 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %67, i32 0, i32 0
-  store ptr %64, ptr %68, align 8
-  %69 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %67, i32 0, i32 1
-  store i64 2, ptr %69, align 4
-  %70 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %67, i32 0, i32 2
-  store i64 2, ptr %70, align 4
-  %71 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %67, align 8
-  %72 = call ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String" %63, %"github.com/goplus/llgo/internal/runtime.Slice" %71)
-  %73 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
-  %74 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %73, i32 0, i32 0
-  store ptr @12, ptr %74, align 8
-  %75 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %73, i32 0, i32 1
-  store i64 8, ptr %75, align 4
-  %76 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %73, align 8
-  %77 = call ptr @"github.com/goplus/llgo/internal/runtime.Named"(%"github.com/goplus/llgo/internal/runtime.String" %76, ptr %72)
-  store ptr %77, ptr @main.bar, align 8
+  %44 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %45 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %44, i32 0, i32 0
+  store ptr @8, ptr %45, align 8
+  %46 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %44, i32 0, i32 1
+  store i64 2, ptr %46, align 4
+  %47 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %44, align 8
+  %48 = load ptr, ptr @"*_llgo_byte", align 8
+  %49 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %50 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %49, i32 0, i32 0
+  store ptr @9, ptr %50, align 8
+  %51 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %49, i32 0, i32 1
+  store i64 0, ptr %51, align 4
+  %52 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %49, align 8
+  %53 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %47, ptr %48, i64 0, %"github.com/goplus/llgo/internal/runtime.String" %52, i1 false)
+  %54 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %55 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %54, i32 0, i32 0
+  store ptr @10, ptr %55, align 8
+  %56 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %54, i32 0, i32 1
+  store i64 1, ptr %56, align 4
+  %57 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %54, align 8
+  %58 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 13)
+  %59 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %60 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %59, i32 0, i32 0
+  store ptr @11, ptr %60, align 8
+  %61 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %59, i32 0, i32 1
+  store i64 0, ptr %61, align 4
+  %62 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %59, align 8
+  %63 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %57, ptr %58, i64 8, %"github.com/goplus/llgo/internal/runtime.String" %62, i1 false)
+  %64 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %65 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %64, i32 0, i32 0
+  store ptr @12, ptr %65, align 8
+  %66 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %64, i32 0, i32 1
+  store i64 4, ptr %66, align 4
+  %67 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %64, align 8
+  %68 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 112)
+  %69 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %68, i64 0
+  store %"github.com/goplus/llgo/internal/abi.StructField" %53, ptr %69, align 8
+  %70 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %68, i64 1
+  store %"github.com/goplus/llgo/internal/abi.StructField" %63, ptr %70, align 8
+  %71 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
+  %72 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %71, i32 0, i32 0
+  store ptr %68, ptr %72, align 8
+  %73 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %71, i32 0, i32 1
+  store i64 2, ptr %73, align 4
+  %74 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %71, i32 0, i32 2
+  store i64 2, ptr %74, align 4
+  %75 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %71, align 8
+  %76 = call ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String" %67, i64 16, %"github.com/goplus/llgo/internal/runtime.Slice" %75)
+  %77 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %78 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %77, i32 0, i32 0
+  store ptr @13, ptr %78, align 8
+  %79 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %77, i32 0, i32 1
+  store i64 4, ptr %79, align 4
+  %80 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %77, align 8
+  %81 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %82 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %81, i32 0, i32 0
+  store ptr @14, ptr %82, align 8
+  %83 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %81, i32 0, i32 1
+  store i64 8, ptr %83, align 4
+  %84 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %81, align 8
+  %85 = call ptr @"github.com/goplus/llgo/internal/runtime.Named"(%"github.com/goplus/llgo/internal/runtime.String" %80, %"github.com/goplus/llgo/internal/runtime.String" %84, ptr %76, { ptr, i64, i64 } zeroinitializer)
+  store ptr %85, ptr @main.bar, align 8
   ret void
 }
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Struct"(i64, %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+declare ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String", i64, %"github.com/goplus/llgo/internal/runtime.Slice")
 
-declare %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String", ptr, i64, %"github.com/goplus/llgo/internal/runtime.String", i1, i1)
+declare %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String", ptr, i64, %"github.com/goplus/llgo/internal/runtime.String", i1)
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64)
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Named"(%"github.com/goplus/llgo/internal/runtime.String", ptr)
+declare ptr @"github.com/goplus/llgo/internal/runtime.Named"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", ptr, %"github.com/goplus/llgo/internal/runtime.Slice")
diff --git a/cl/_testrt/concat/out.ll b/cl/_testrt/concat/out.ll
index f850807f..1ef2685d 100644
--- a/cl/_testrt/concat/out.ll
+++ b/cl/_testrt/concat/out.ll
@@ -25,37 +25,26 @@ _llgo_0:
   %4 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %2, i32 0, i32 1
   store i64 0, ptr %4, align 4
   %5 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %2, align 8
-  %6 = extractvalue %"github.com/goplus/llgo/internal/runtime.String" %5, 0
-  %7 = extractvalue %"github.com/goplus/llgo/internal/runtime.String" %5, 1
   br label %_llgo_1
 
 _llgo_1:                                          ; preds = %_llgo_2, %_llgo_0
-  %8 = phi ptr [ %6, %_llgo_0 ], [ %22, %_llgo_2 ]
-  %9 = phi i64 [ %7, %_llgo_0 ], [ %23, %_llgo_2 ]
-  %10 = phi i64 [ -1, %_llgo_0 ], [ %15, %_llgo_2 ]
-  %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 %8, ptr %12, align 8
-  %13 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %11, i32 0, i32 1
-  store i64 %9, ptr %13, align 4
-  %14 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %11, align 8
-  %15 = add i64 %10, 1
-  %16 = icmp slt i64 %15, %1
-  br i1 %16, label %_llgo_2, label %_llgo_3
+  %6 = phi %"github.com/goplus/llgo/internal/runtime.String" [ %5, %_llgo_0 ], [ %14, %_llgo_2 ]
+  %7 = phi i64 [ -1, %_llgo_0 ], [ %8, %_llgo_2 ]
+  %8 = add i64 %7, 1
+  %9 = icmp slt i64 %8, %1
+  br i1 %9, label %_llgo_2, label %_llgo_3
 
 _llgo_2:                                          ; preds = %_llgo_1
-  %17 = icmp slt i64 %15, 0
-  call void @"github.com/goplus/llgo/internal/runtime.AssertIndexRange"(i1 %17)
-  %18 = extractvalue %"github.com/goplus/llgo/internal/runtime.Slice" %0, 0
-  %19 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %18, i64 %15
-  %20 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %19, align 8
-  %21 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.StringCat"(%"github.com/goplus/llgo/internal/runtime.String" %14, %"github.com/goplus/llgo/internal/runtime.String" %20)
-  %22 = extractvalue %"github.com/goplus/llgo/internal/runtime.String" %21, 0
-  %23 = extractvalue %"github.com/goplus/llgo/internal/runtime.String" %21, 1
+  %10 = icmp slt i64 %8, 0
+  call void @"github.com/goplus/llgo/internal/runtime.AssertIndexRange"(i1 %10)
+  %11 = extractvalue %"github.com/goplus/llgo/internal/runtime.Slice" %0, 0
+  %12 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %11, i64 %8
+  %13 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %12, align 8
+  %14 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.StringCat"(%"github.com/goplus/llgo/internal/runtime.String" %6, %"github.com/goplus/llgo/internal/runtime.String" %13)
   br label %_llgo_1
 
 _llgo_3:                                          ; preds = %_llgo_1
-  ret %"github.com/goplus/llgo/internal/runtime.String" %14
+  ret %"github.com/goplus/llgo/internal/runtime.String" %6
 }
 
 define %"github.com/goplus/llgo/internal/runtime.String" @main.info(%"github.com/goplus/llgo/internal/runtime.String" %0) {
diff --git a/cl/_testrt/gblarray/out.ll b/cl/_testrt/gblarray/out.ll
index 2fc333fb..45de88a6 100644
--- a/cl/_testrt/gblarray/out.ll
+++ b/cl/_testrt/gblarray/out.ll
@@ -1,8 +1,8 @@
 ; ModuleID = 'main'
 source_filename = "main"
 
-%"github.com/goplus/llgo/internal/abi.Type" = type { i64, i64, i32, i8, i8, i8, i8, { ptr, ptr }, ptr, %"github.com/goplus/llgo/internal/abi.Name", ptr }
-%"github.com/goplus/llgo/internal/abi.Name" = type { ptr }
+%"github.com/goplus/llgo/internal/abi.Type" = type { i64, i64, i32, i8, i8, i8, i8, { ptr, ptr }, ptr, %"github.com/goplus/llgo/internal/runtime.String", ptr }
+%"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 }
 
 @main.basicTypes = global [25 x ptr] undef
 @"main.init$guard" = global ptr null
@@ -20,7 +20,7 @@ _llgo_0:
 
 define ptr @main.basicType(i64 %0) {
 _llgo_0:
-  %1 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 64)
+  %1 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 72)
   %2 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %1, i32 0, i32 0
   %3 = getelementptr inbounds i64, ptr @main.sizeBasicTypes, i64 %0
   %4 = load i64, ptr %3, align 4
diff --git a/cl/compile.go b/cl/compile.go
index 991c136e..7105730d 100644
--- a/cl/compile.go
+++ b/cl/compile.go
@@ -522,7 +522,7 @@ func (p *context) compilePhis(b llssa.Builder, block *ssa.BasicBlock) int {
 			}
 			for i := 0; i < n; i++ {
 				iv := block.Instrs[i].(*ssa.Phi)
-				p.bvals[iv] = rets[i].Do(b)
+				p.bvals[iv] = rets[i]
 			}
 			return n
 		}
@@ -540,7 +540,8 @@ func (p *context) compilePhi(b llssa.Builder, v *ssa.Phi) (ret llssa.Expr) {
 			bblks[i] = p.fn.Block(pred.Index)
 		}
 		edges := v.Edges
-		phi.AddIncoming(b, bblks, func(i int) llssa.Expr {
+		phi.AddIncoming(b, bblks, func(i int, blk llssa.BasicBlock) llssa.Expr {
+			b.SetBlockEx(blk, llssa.BeforeLast, false)
 			return p.compileValue(b, edges[i])
 		})
 	})
@@ -784,7 +785,7 @@ func (p *context) compileInstr(b llssa.Builder, instr ssa.Instruction) {
 		val := p.compileValue(b, v.Value)
 		b.MapUpdate(m, key, val)
 	case *ssa.Panic:
-		arg := p.compileValue(b, v.X).Do(b)
+		arg := p.compileValue(b, v.X)
 		b.Panic(arg)
 	default:
 		panic(fmt.Sprintf("compileInstr: unknown instr - %T\n", instr))
@@ -856,7 +857,7 @@ func (p *context) compileValues(b llssa.Builder, vals []ssa.Value, hasVArg int)
 	n := len(vals) - hasVArg
 	ret := make([]llssa.Expr, n)
 	for i := 0; i < n; i++ {
-		ret[i] = p.compileValue(b, vals[i]).Do(b)
+		ret[i] = p.compileValue(b, vals[i])
 	}
 	if hasVArg > 0 {
 		ret = p.compileVArg(ret, b, vals[n])
diff --git a/internal/abi/llgo_autogen.lla b/internal/abi/llgo_autogen.lla
index 0d23b976..2eb60535 100644
Binary files a/internal/abi/llgo_autogen.lla and b/internal/abi/llgo_autogen.lla differ
diff --git a/internal/abi/type.go b/internal/abi/type.go
index b43621a9..8cf09096 100644
--- a/internal/abi/type.go
+++ b/internal/abi/type.go
@@ -20,6 +20,15 @@ import (
 	"unsafe"
 )
 
+// IsExported reports whether name starts with an upper-case letter.
+func IsExported(name string) bool {
+	if len(name) > 0 {
+		c := name[0]
+		return 'A' <= c && c <= 'Z'
+	}
+	return false
+}
+
 // -----------------------------------------------------------------------------
 
 // Type is the runtime representation of a Go type.
@@ -46,8 +55,8 @@ type Type struct {
 	// If the KindGCProg bit is set in kind, GCData is a GC program.
 	// Otherwise it is a ptrmask bitmap. See mbitmap.go for details.
 	GCData     *byte
-	Str_       Name  // string form
-	PtrToThis_ *Type // type for pointer to this type, may be nil
+	Str_       string // string form
+	PtrToThis_ *Type  // type for pointer to this type, may be nil
 }
 
 // A Kind represents the specific kind of type that a Type represents.
@@ -209,43 +218,57 @@ func (p *FuncType) Variadic() bool {
 }
 
 type StructField struct {
-	Name   Name    // name is always non-empty
+	Name_  string  // name is always non-empty
 	Typ    *Type   // type of field
 	Offset uintptr // byte offset of field
+
+	Tag_      string
+	Embedded_ bool
 }
 
+// Embedded reports whether the field is embedded.
 func (f *StructField) Embedded() bool {
-	return f.Name.IsEmbedded()
+	return f.Embedded_
+}
+
+// Exported reports whether the field is exported.
+func (f *StructField) Exported() bool {
+	return IsExported(f.Name_)
 }
 
 type StructType struct {
 	Type
-	PkgPath Name
-	Fields  []StructField
+	PkgPath_ string
+	Fields   []StructField
 }
 
 type InterfaceType struct {
 	Type
-	PkgPath Name      // import path
-	Methods []Imethod // sorted by hash
+	PkgPath_ string    // import path
+	Methods  []Imethod // sorted by hash
 }
 
 type Text = unsafe.Pointer // TODO(xsw): to be confirmed
 
 // Method on non-interface type
 type Method struct {
-	Name_ Name      // name of method
+	Name_ string    // name of method
 	Mtyp_ *FuncType // method type (without receiver)
 	Ifn_  Text      // fn used in interface call (one-word receiver)
 	Tfn_  Text      // fn used for normal method call
 }
 
+// Exported reports whether the method is exported.
+func (p *Method) Exported() bool {
+	return IsExported(p.Name_)
+}
+
 // UncommonType is present only for defined types or types with methods
 // (if T is a defined type, the uncommonTypes for T and *T have methods).
 // Using a pointer to this struct reduces the overall size required
 // to describe a non-defined type with no methods.
 type UncommonType struct {
-	PkgPath_ Name   // import path; empty for built-in types like int, string
+	PkgPath_ string // import path; empty for built-in types like int, string
 	Mcount   uint16 // number of methods
 	Xcount   uint16 // number of exported methods
 	Moff     uint32 // offset from this uncommontype to [mcount]Method
@@ -267,7 +290,7 @@ func (t *UncommonType) ExportedMethods() []Method {
 
 // Imethod represents a method on an interface type
 type Imethod struct {
-	Name_ Name      // name of method
+	Name_ string    // name of method
 	Typ_  *FuncType // .(*FuncType) underneath
 }
 
@@ -285,6 +308,70 @@ func (t *Type) Common() *Type {
 	return t
 }
 
+type structTypeUncommon struct {
+	StructType
+	u UncommonType
+}
+
+// Uncommon returns a pointer to T's "uncommon" data if there is any, otherwise nil
+func (t *Type) Uncommon() *UncommonType {
+	if t.TFlag&TFlagUncommon == 0 {
+		return nil
+	}
+	switch t.Kind() {
+	case Struct:
+		return &(*structTypeUncommon)(unsafe.Pointer(t)).u
+	case Pointer:
+		type u struct {
+			PtrType
+			u UncommonType
+		}
+		return &(*u)(unsafe.Pointer(t)).u
+	case Func:
+		type u struct {
+			FuncType
+			u UncommonType
+		}
+		return &(*u)(unsafe.Pointer(t)).u
+	case Slice:
+		type u struct {
+			SliceType
+			u UncommonType
+		}
+		return &(*u)(unsafe.Pointer(t)).u
+	case Array:
+		type u struct {
+			ArrayType
+			u UncommonType
+		}
+		return &(*u)(unsafe.Pointer(t)).u
+	case Chan:
+		type u struct {
+			ChanType
+			u UncommonType
+		}
+		return &(*u)(unsafe.Pointer(t)).u
+	case Map:
+		type u struct {
+			MapType
+			u UncommonType
+		}
+		return &(*u)(unsafe.Pointer(t)).u
+	case Interface:
+		type u struct {
+			InterfaceType
+			u UncommonType
+		}
+		return &(*u)(unsafe.Pointer(t)).u
+	default:
+		type u struct {
+			Type
+			u UncommonType
+		}
+		return &(*u)(unsafe.Pointer(t)).u
+	}
+}
+
 // Len returns the length of t if t is an array type, otherwise 0
 func (t *Type) Len() int {
 	if t.Kind() == Array {
@@ -369,6 +456,7 @@ func addChecked(p unsafe.Pointer, x uintptr, whySafe string) unsafe.Pointer {
 	return unsafe.Pointer(uintptr(p) + x)
 }
 
+/*
 // Name is an encoded type Name with optional extra data.
 //
 // The first byte is a bit field containing:
@@ -519,5 +607,6 @@ func NewName(n, tag string, exported, embedded bool) Name {
 
 	return Name{Bytes: &b[0]}
 }
+*/
 
 // -----------------------------------------------------------------------------
diff --git a/internal/runtime/c/c.go b/internal/runtime/c/c.go
index eb502d92..3d200e36 100644
--- a/internal/runtime/c/c.go
+++ b/internal/runtime/c/c.go
@@ -42,8 +42,8 @@ var Stderr FilePtr
 //go:linkname Str llgo.cstr
 func Str(string) *Char
 
-//go:linkname Advance llgo.advance
-func Advance(ptr Pointer, offset int) Pointer
+// llgo:link Advance llgo.advance
+func Advance[PtrT any](ptr PtrT, offset int) PtrT { return ptr }
 
 //go:linkname Alloca llgo.alloca
 func Alloca(size uintptr) Pointer
diff --git a/internal/runtime/llgo_autogen.lla b/internal/runtime/llgo_autogen.lla
index e2f90b84..6b788455 100644
Binary files a/internal/runtime/llgo_autogen.lla and b/internal/runtime/llgo_autogen.lla differ
diff --git a/internal/runtime/runtime2.go b/internal/runtime/runtime2.go
deleted file mode 100644
index 69d80ae1..00000000
--- a/internal/runtime/runtime2.go
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package runtime
-
-import (
-	"unsafe"
-)
-
-type eface struct {
-	_type *_type
-	data  unsafe.Pointer
-}
-
-type iface struct {
-	tab  *itab
-	data unsafe.Pointer
-}
-
-// layout of Itab known to compilers
-// allocated in non-garbage-collected memory
-// Needs to be in sync with
-// ../cmd/compile/internal/reflectdata/reflect.go:/^func.WriteTabs.
-type itab struct {
-	inter *interfacetype
-	_type *_type
-	hash  uint32 // copy of _type.hash. Used for type switches.
-	_     [4]byte
-	fun   [1]uintptr // variable sized. fun[0]==0 means _type does not implement inter.
-}
-
-/*
-func efaceOf(ep *any) *eface {
-	return (*eface)(unsafe.Pointer(ep))
-}
-
-func MakeInterface(inter *InterfaceType, typ *Type, data unsafe.Pointer) Interface {
-	tab := &itab{inter: inter, _type: typ, hash: 0, fun: [1]uintptr{0}}
-	return Interface{
-		tab: tab, data: data,
-	}
-}
-*/
diff --git a/internal/runtime/type.go b/internal/runtime/type.go
index 36ce1a0f..8e8b4332 100644
--- a/internal/runtime/type.go
+++ b/internal/runtime/type.go
@@ -12,11 +12,9 @@ import (
 
 type _type = abi.Type
 
-type interfacetype = abi.InterfaceType
-
+/*
 type maptype = abi.MapType
 
-/*
 type arraytype = abi.ArrayType
 
 type chantype = abi.ChanType
diff --git a/internal/runtime/z_face.go b/internal/runtime/z_face.go
new file mode 100644
index 00000000..c7611fd3
--- /dev/null
+++ b/internal/runtime/z_face.go
@@ -0,0 +1,205 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package runtime
+
+import (
+	"unsafe"
+
+	"github.com/goplus/llgo/internal/abi"
+	"github.com/goplus/llgo/internal/runtime/c"
+)
+
+type eface struct {
+	_type *_type
+	data  unsafe.Pointer
+}
+
+type iface struct {
+	tab  *itab
+	data unsafe.Pointer
+}
+
+type interfacetype = abi.InterfaceType
+
+// layout of Itab known to compilers
+// allocated in non-garbage-collected memory
+// Needs to be in sync with
+// ../cmd/compile/internal/reflectdata/reflect.go:/^func.WriteTabs.
+type itab struct {
+	inter *interfacetype
+	_type *_type
+	hash  uint32 // copy of _type.hash. Used for type switches.
+	_     [4]byte
+	fun   [1]uintptr // variable sized. fun[0]==0 means _type does not implement inter.
+}
+
+// -----------------------------------------------------------------------------
+
+type (
+	Eface = eface
+	Iface = iface
+	Itab  = itab
+)
+
+type FuncType = abi.FuncType
+type InterfaceType = abi.InterfaceType
+
+// ToEface converts an iface to an eface.
+func ToEface(i Iface) Eface {
+	return Eface{i.tab._type, i.data}
+}
+
+// -----------------------------------------------------------------------------
+
+const (
+	typeHdrSize         = unsafe.Sizeof(abi.Type{})
+	funcTypeHdrSize     = unsafe.Sizeof(abi.FuncType{})
+	uncommonTypeHdrSize = unsafe.Sizeof(abi.UncommonType{})
+	methodSize          = unsafe.Sizeof(abi.Method{})
+	pointerSize         = unsafe.Sizeof(uintptr(0))
+	itabHdrSize         = unsafe.Sizeof(itab{}) - pointerSize
+)
+
+// Func returns a function type.
+func Func(in, out []*Type, variadic bool) *FuncType {
+	n := len(in) + len(out)
+	ptr := AllocU(funcTypeHdrSize + uintptr(n)*pointerSize)
+	c.Memset(ptr, 0, funcTypeHdrSize)
+
+	ret := (*abi.FuncType)(ptr)
+	ret.Size_ = pointerSize
+	ret.Hash = uint32(abi.Func) // TODO(xsw): hash
+	ret.Kind_ = uint8(abi.Func)
+	ret.InCount = uint16(len(in))
+	ret.OutCount = uint16(len(out))
+	if variadic {
+		ret.OutCount |= 1 << 15
+	}
+
+	data := (**Type)(c.Advance(ptr, int(funcTypeHdrSize)))
+	params := unsafe.Slice(data, n)
+	copy(params, in)
+	copy(params[len(in):], out)
+	return ret
+}
+
+// Imethod returns an interface method.
+func Imethod(name string, typ *FuncType) abi.Imethod {
+	return abi.Imethod{
+		Name_: name,
+		Typ_:  typ,
+	}
+}
+
+// Method returns a method.
+func Method(name string, typ *FuncType, ifn, tfn abi.Text) abi.Method {
+	return abi.Method{
+		Name_: name,
+		Mtyp_: typ,
+		Ifn_:  ifn,
+		Tfn_:  tfn,
+	}
+}
+
+// Named returns a named type.
+func Named(pkgPath, name string, underlying *Type, methods []abi.Method) *Type {
+	tflag := underlying.TFlag
+	size := typeHdrSize
+	n := len(methods)
+	if n > 0 || pkgPath != "" {
+		size += uncommonTypeHdrSize + uintptr(n)*methodSize
+		tflag |= abi.TFlagUncommon
+	}
+	ptr := AllocU(size)
+
+	ret := (*Type)(ptr)
+	*ret = *underlying
+	ret.TFlag = tflag | abi.TFlagNamed
+	ret.Str_ = name
+
+	xcount := 0
+	for _, m := range methods {
+		if !m.Exported() {
+			break
+		}
+		xcount++
+	}
+
+	uncommon := (*abi.UncommonType)(c.Advance(ptr, int(typeHdrSize)))
+	uncommon.PkgPath_ = pkgPath
+	uncommon.Mcount = uint16(n)
+	uncommon.Xcount = uint16(xcount)
+	uncommon.Moff = uint32(uncommonTypeHdrSize)
+
+	data := (*abi.Method)(c.Advance(ptr, int(typeHdrSize+uncommonTypeHdrSize)))
+	copy(unsafe.Slice(data, n), methods)
+	return ret
+}
+
+// Interface returns an interface type.
+func Interface(pkgPath string, methods []abi.Imethod) *Type {
+	ret := &abi.InterfaceType{
+		Type: Type{
+			Size_: unsafe.Sizeof(eface{}),
+			Hash:  uint32(abi.Interface), // TODO(xsw): hash
+			Kind_: uint8(abi.Interface),
+		},
+		PkgPath_: pkgPath,
+		Methods:  methods,
+	}
+	return &ret.Type
+}
+
+// NewItab returns a new itab.
+func NewItab(inter *InterfaceType, typ *Type) *Itab {
+	n := len(inter.Methods)
+	size := itabHdrSize + uintptr(n)*pointerSize
+	ptr := AllocU(size)
+
+	ret := (*Itab)(ptr)
+	ret.inter = inter
+	ret._type = typ
+	ret.hash = typ.Hash
+
+	u := typ.Uncommon()
+	if u == nil {
+		ret.fun[0] = 0
+	} else {
+		data := (*uintptr)(c.Advance(ptr, int(itabHdrSize)))
+		mthds := methods(u, inter.PkgPath_)
+		for i, m := range inter.Methods {
+			fn := findMethod(mthds, m)
+			if fn == nil {
+				ret.fun[0] = 0
+				break
+			}
+			*c.Advance(data, i) = uintptr(fn)
+		}
+	}
+	return ret
+}
+
+func findMethod(mthds []abi.Method, im abi.Imethod) abi.Text {
+	imName := im.Name_
+	for _, m := range mthds {
+		mName := m.Name_
+		if mName >= imName {
+			if mName == imName && m.Mtyp_ == im.Typ_ {
+				return m.Ifn_
+			}
+			break
+		}
+	}
+	return nil
+}
+
+func methods(u *abi.UncommonType, from string) []abi.Method {
+	if u.PkgPath_ == from {
+		return u.Methods()
+	}
+	return u.ExportedMethods()
+}
+
+// -----------------------------------------------------------------------------
diff --git a/internal/runtime/z_type.go b/internal/runtime/z_type.go
index 403c37b0..aa4431bb 100644
--- a/internal/runtime/z_type.go
+++ b/internal/runtime/z_type.go
@@ -20,104 +20,29 @@ import (
 	"unsafe"
 
 	"github.com/goplus/llgo/internal/abi"
-	"github.com/goplus/llgo/internal/runtime/c"
-)
-
-type (
-	Eface = eface
-	Iface = iface
-	Itab  = itab
 )
 
 type Kind = abi.Kind
 type Type = abi.Type
 
-type FuncType = abi.FuncType
-type InterfaceType = abi.InterfaceType
-
 // -----------------------------------------------------------------------------
 
-// Func returns a function type.
-func Func(in, out []*Type, variadic bool) *FuncType {
-	const (
-		funcTypeHdrSize = unsafe.Sizeof(abi.FuncType{})
-		pointerSize     = unsafe.Sizeof(uintptr(0))
-	)
+/*
+type Name = abi.Name
 
-	n := len(in) + len(out)
-	ptr := AllocU(funcTypeHdrSize + uintptr(n)*pointerSize)
-	c.Memset(ptr, 0, funcTypeHdrSize)
+// NewName creates a new name.
+func NewName(name string, exported bool) Name {
+	return abi.NewName(name, "", exported, false)
+}
 
-	ret := (*abi.FuncType)(ptr)
-	ret.Size_ = pointerSize
-	ret.Hash = uint32(abi.Func) // TODO(xsw): hash
-	ret.Kind_ = uint8(abi.Func)
-	ret.InCount = uint16(len(in))
-	ret.OutCount = uint16(len(out))
-	if variadic {
-		ret.OutCount |= 1 << 15
-	}
-
-	data := (**Type)(c.Advance(ptr, int(funcTypeHdrSize)))
-	params := unsafe.Slice(data, n)
-	copy(params, in)
-	copy(params[len(in):], out)
-	return ret
-}
-
-// Imethod returns an interface method.
-func Imethod(name string, typ *FuncType, exported bool) abi.Imethod {
-	n := abi.NewName(name, "", exported, false)
-	return abi.Imethod{
-		Name_: n,
-		Typ_:  typ,
-	}
-}
-
-// Method returns a method.
-func Method(name string, typ *FuncType, fn abi.Text, exported bool) abi.Method {
-	n := abi.NewName(name, "", exported, false)
-	return abi.Method{
-		Name_: n,
-		Mtyp_: typ,
-		Ifn_:  fn,
-		Tfn_:  fn,
-	}
-}
-
-// -----------------------------------------------------------------------------
-
-// Named returns a named type.
-func Named(name string, typ *Type) *Type {
-	ret := *typ // TODO(xsw): named type
-	return &ret
-}
-
-// Interface returns an interface type.
-func Interface(pkgPath string) *Type {
-	// TODO(xsw): pkgPath
-	// npkg := abi.NewName(pkgPath, "", false, false)
-	ret := &abi.InterfaceType{
-		Type: Type{
-			Size_: unsafe.Sizeof(eface{}),
-			Hash:  uint32(abi.Interface), // TODO(xsw): hash
-			Kind_: uint8(abi.Interface),
-		},
-		//PkgPath: npkg,
-		Methods: nil,
-	}
-	return &ret.Type
-}
-
-// NewItab returns a new itab.
-func NewItab(inter *InterfaceType, typ *Type) *Itab {
-	return &itab{
-		inter: inter,
-		_type: typ,
-		hash:  typ.Hash,
-		//fun: nil, TODO(xsw)
+// NewPkgName creates a package name.
+func NewPkgName(pkgPath string) (ret Name) {
+	if len(pkgPath) > 0 {
+		ret = abi.NewName(pkgPath, "", false, false)
 	}
+	return
 }
+*/
 
 // -----------------------------------------------------------------------------
 
@@ -180,31 +105,32 @@ func basicType(kind abi.Kind) *Type {
 // -----------------------------------------------------------------------------
 
 // StructField returns a struct field.
-func StructField(name string, typ *Type, off uintptr, tag string, exported, embedded bool) abi.StructField {
-	n := abi.NewName(name, tag, exported, embedded)
+func StructField(name string, typ *Type, off uintptr, tag string, embedded bool) abi.StructField {
 	return abi.StructField{
-		Name:   n,
-		Typ:    typ,
-		Offset: off,
+		Name_:     name,
+		Typ:       typ,
+		Offset:    off,
+		Tag_:      tag,
+		Embedded_: embedded,
 	}
 }
 
 // Struct returns a struct type.
-func Struct(size uintptr, pkgPath string, fields ...abi.StructField) *Type {
-	// TODO(xsw): pkgPath
-	// npkg := abi.NewName(pkgPath, "", false, false)
+func Struct(pkgPath string, size uintptr, fields ...abi.StructField) *Type {
 	ret := &abi.StructType{
 		Type: Type{
 			Size_: size,
 			Hash:  uint32(abi.Struct), // TODO(xsw): hash
 			Kind_: uint8(abi.Struct),
 		},
-		// PkgPath: npkg,
-		Fields: fields,
+		PkgPath_: pkgPath,
+		Fields:   fields,
 	}
 	return &ret.Type
 }
 
+// -----------------------------------------------------------------------------
+
 // Pointer returns a pointer type.
 func Pointer(elem *Type) *Type {
 	ret := &abi.PtrType{
diff --git a/ssa/expr.go b/ssa/expr.go
index 0258755c..5e7b50af 100644
--- a/ssa/expr.go
+++ b/ssa/expr.go
@@ -41,16 +41,6 @@ func (v Expr) IsNil() bool {
 	return v.Type == nil
 }
 
-// Do evaluates the delay expression and returns the result.
-func (v Expr) Do(b Builder) Expr { // TODO(xsw): can we remove this method?
-	switch vt := v.Type; vt.kind {
-	case vkPhisExpr:
-		e := vt.raw.Type.(*phisExprTy)
-		return b.aggregateValue(e.Type, e.phis...)
-	}
-	return v
-}
-
 // -----------------------------------------------------------------------------
 
 type pyVarTy struct {
@@ -73,26 +63,6 @@ func pyVarExpr(mod Expr, name string) Expr {
 
 // -----------------------------------------------------------------------------
 
-type phisExprTy struct {
-	phis []llvm.Value
-	Type
-}
-
-func (p phisExprTy) Underlying() types.Type {
-	panic("don't call")
-}
-
-func (p phisExprTy) String() string {
-	return "phisExpr"
-}
-
-func phisExpr(t Type, phis []llvm.Value) Expr {
-	tphi := &aType{raw: rawType{&phisExprTy{phis, t}}, kind: vkPhisExpr}
-	return Expr{Type: tphi}
-}
-
-// -----------------------------------------------------------------------------
-
 func (p Program) Zero(t Type) Expr {
 	var ret llvm.Value
 	switch u := t.raw.Type.Underlying().(type) {
@@ -121,6 +91,8 @@ func (p Program) Zero(t Type) Expr {
 			flds[i] = p.Zero(p.rawType(u.Field(i).Type())).impl
 		}
 		ret = llvm.ConstStruct(flds, false)
+	case *types.Slice:
+		ret = p.Zero(p.rtType("Slice")).impl
 	default:
 		log.Panicln("todo:", u)
 	}
@@ -221,6 +193,12 @@ func (b Builder) Str(v string) (ret Expr) {
 	return Expr{aggregateValue(b.impl, prog.rtString(), data, size), prog.String()}
 }
 
+func (b Builder) pkgName(pkgPath string) Expr {
+	// TODO(xsw): use a global cache
+	// return b.Call(b.Pkg.rtFunc("NewPkgName"), b.Str(pkgPath))
+	return b.Str(pkgPath)
+}
+
 // unsafeString(data *byte, size int) string
 func (b Builder) unsafeString(data, size llvm.Value) Expr {
 	prog := b.Prog
@@ -528,14 +506,6 @@ func llvmFields(vals []Expr, t *types.Struct, b Builder) (ret []llvm.Value) {
 	return
 }
 
-func llvmDelayValues(f func(i int) Expr, n int) []llvm.Value {
-	ret := make([]llvm.Value, n)
-	for i := 0; i < n; i++ {
-		ret[i] = f(i).impl
-	}
-	return ret
-}
-
 func llvmPredBlocks(preds []BasicBlock) []llvm.BasicBlock {
 	ret := make([]llvm.BasicBlock, len(preds))
 	for i, v := range preds {
@@ -544,60 +514,115 @@ func llvmPredBlocks(preds []BasicBlock) []llvm.BasicBlock {
 	return ret
 }
 
-// Phi represents a phi node.
-type Phi struct {
+type aPhi struct {
 	Expr
+	// phis []llvm.Value
 }
 
+// Phi represents a phi node.
+type Phi = *aPhi
+
+/*
+func (b Builder) newPhi(t Type, phis []llvm.Value) Phi {
+	ret := b.aggregateValue(t, phis...)
+	return &aPhi{ret, phis}
+}
+*/
+
 // AddIncoming adds incoming values to a phi node.
-func (p Phi) AddIncoming(b Builder, preds []BasicBlock, f func(i int) Expr) {
+func (p Phi) AddIncoming(b Builder, preds []BasicBlock, f func(i int, blk BasicBlock) Expr) {
 	bs := llvmPredBlocks(preds)
-	if p.kind != vkPhisExpr { // normal phi node
-		vs := llvmDelayValues(f, len(preds))
-		p.impl.AddIncoming(vs, bs)
-		return
-	}
-	e := p.raw.Type.(*phisExprTy)
-	phis := e.phis
-	vals := make([][]llvm.Value, len(phis))
-	for iblk, blk := range preds {
-		last := blk.last.LastInstruction()
-		b.impl.SetInsertPointBefore(last)
-		impl := b.impl
-		val := f(iblk).impl
-		for i := range phis {
-			if iblk == 0 {
-				vals[i] = make([]llvm.Value, len(preds))
+	/*
+		phis := p.phis
+		if phis != nil {
+			vals := make([][]llvm.Value, len(phis))
+			for iblk, blk := range preds {
+				val := f(iblk, blk).impl
+				impl := b.impl
+				b.SetBlockEx(blk, BeforeLast, false)
+				for i := range phis {
+					if iblk == 0 {
+						vals[i] = make([]llvm.Value, len(preds))
+					}
+					vals[i][iblk] = llvm.CreateExtractValue(impl, val, i)
+				}
 			}
-			vals[i][iblk] = llvm.CreateExtractValue(impl, val, i)
+			for i, phi := range phis {
+				phi.AddIncoming(vals[i], bs)
+			}
+		} else */
+	{
+		vals := make([]llvm.Value, len(preds))
+		for iblk, blk := range preds {
+			vals[iblk] = f(iblk, blk).impl
 		}
-	}
-	for i, phi := range phis {
-		phi.AddIncoming(vals[i], bs)
+		p.impl.AddIncoming(vals, bs)
 	}
 }
 
 // Phi returns a phi node.
 func (b Builder) Phi(t Type) Phi {
 	impl := b.impl
-	switch tund := t.raw.Type.Underlying().(type) {
-	case *types.Basic:
-		kind := tund.Kind()
-		switch kind {
-		case types.String:
-			prog := b.Prog
-			phis := make([]llvm.Value, 2)
-			phis[0] = llvm.CreatePHI(impl, prog.tyVoidPtr())
-			phis[1] = llvm.CreatePHI(impl, prog.tyInt())
-			return Phi{phisExpr(t, phis)}
+	/*
+		switch tund := t.raw.Type.Underlying().(type) {
+		case *types.Basic:
+			kind := tund.Kind()
+			switch kind {
+			case types.String:
+				phis := createStringPhis(impl, make([]llvm.Value, 0, 2), b.Prog)
+				return b.newPhi(t, phis)
+			}
+		case *types.Struct:
+			phis := createStrucPhis(impl, nil, tund, b.Prog)
+			return b.newPhi(t, phis)
+		default:
+			log.Panicf("todo: %T\n", tund)
 		}
-	case *types.Struct:
-		panic("todo")
-	}
+	*/
 	phi := llvm.CreatePHI(impl, t.ll)
-	return Phi{Expr{phi, t}}
+	return &aPhi{Expr{phi, t}} //, nil}
 }
 
+/*
+func createStringPhis(b llvm.Builder, phis []llvm.Value, prog Program) []llvm.Value {
+	phis = append(phis, llvm.CreatePHI(b, prog.tyVoidPtr()))
+	return append(phis, llvm.CreatePHI(b, prog.tyInt()))
+}
+
+func createStrucPhis(b llvm.Builder, phis []llvm.Value, t *types.Struct, prog Program) []llvm.Value {
+	n := t.NumFields()
+	if phis == nil {
+		phis = make([]llvm.Value, 0, n)
+	}
+	for i := 0; i < n; i++ {
+		fld := t.Field(i)
+		switch tfld := fld.Type().Underlying().(type) {
+		case *types.Basic:
+			kind := tfld.Kind()
+			switch kind {
+			case types.String:
+				phis = createStringPhis(b, phis, prog)
+			default:
+				phis = createBasicPhi(b, phis, tfld, prog)
+			}
+		case *types.Pointer:
+			phis = createBasicPhi(b, phis, tfld, prog)
+		case *types.Struct:
+			phis = createStrucPhis(b, phis, tfld, prog)
+		default:
+			panic("todo")
+		}
+	}
+	return phis
+}
+
+func createBasicPhi(b llvm.Builder, phis []llvm.Value, t types.Type, prog Program) []llvm.Value {
+	tll := prog.rawType(t).ll
+	phi := llvm.CreatePHI(b, tll)
+	return append(phis, phi)
+}
+*/
+
 // -----------------------------------------------------------------------------
 
 // Advance returns the pointer ptr advanced by offset.
diff --git a/ssa/interface.go b/ssa/interface.go
index 51d8ab37..217d231a 100644
--- a/ssa/interface.go
+++ b/ssa/interface.go
@@ -59,10 +59,19 @@ func (b Builder) abiTypeOf(t types.Type) Expr {
 	panic("todo")
 }
 
+// func Named(pkgPath, name string, underlying *Type, methods []abi.Method)
 func (b Builder) abiNamedOf(t *types.Named) Expr {
 	under := b.abiTypeOf(t.Underlying())
 	name := NameOf(t)
-	return b.Call(b.Pkg.rtFunc("Named"), b.Str(name), under)
+
+	prog := b.Prog
+	pkg := b.Pkg
+	pkgPath := b.pkgName(pkg.Path())
+	fn := pkg.rtFunc("Named")
+	tSlice := lastParamType(prog, fn)
+	// TODO(xsw): methods
+	methods := prog.Zero(tSlice)
+	return b.Call(fn, pkgPath, b.Str(name), under, methods)
 }
 
 func (b Builder) abiPointerOf(t *types.Pointer) Expr {
@@ -70,7 +79,7 @@ func (b Builder) abiPointerOf(t *types.Pointer) Expr {
 	return b.Call(b.Pkg.rtFunc("Pointer"), elem)
 }
 
-// func Struct(size uintptr, pkgPath string, fields []abi.StructField) *abi.Type
+// func Struct(pkgPath string, size uintptr, fields []abi.StructField)
 func (b Builder) abiStructOf(t *types.Struct) Expr {
 	pkg := b.Pkg
 	prog := b.Prog
@@ -84,20 +93,24 @@ func (b Builder) abiStructOf(t *types.Struct) Expr {
 		off := uintptr(prog.OffsetOf(typ, i))
 		flds[i] = b.structField(sfAbi, prog, f, off, t.Tag(i))
 	}
-	pkgPath := b.Str(pkg.Path())
-	params := strucAbi.raw.Type.(*types.Signature).Params()
-	tSlice := prog.rawType(params.At(params.Len() - 1).Type().(*types.Slice))
+	pkgPath := b.pkgName(pkg.Path())
+	tSlice := lastParamType(prog, strucAbi)
 	fldSlice := b.SliceLit(tSlice, flds...)
-	return b.Call(strucAbi, pkgPath, fldSlice)
+	size := prog.IntVal(prog.SizeOf(typ), prog.Uintptr())
+	return b.Call(strucAbi, pkgPath, size, fldSlice)
 }
 
-// func StructField(name string, typ *abi.Type, off uintptr, tag string, exported, embedded bool) abi.StructField
+func lastParamType(prog Program, fn Expr) Type {
+	params := fn.raw.Type.(*types.Signature).Params()
+	return prog.rawType(params.At(params.Len() - 1).Type())
+}
+
+// func StructField(name string, typ *abi.Type, off uintptr, tag string, embedded bool) abi.StructField
 func (b Builder) structField(sfAbi Expr, prog Program, f *types.Var, offset uintptr, tag string) Expr {
 	name := b.Str(f.Name())
 	typ := b.abiType(f.Type())
-	exported := prog.Val(f.Exported())
 	embedded := prog.Val(f.Embedded())
-	return b.Call(sfAbi, name, typ, prog.Val(offset), b.Str(tag), exported, embedded)
+	return b.Call(sfAbi, name, typ, prog.Val(offset), b.Str(tag), embedded)
 }
 
 // abiType returns the abi type of the specified type.
@@ -296,21 +309,20 @@ func (b Builder) TypeAssert(x Expr, assertedTyp Type, commaOk bool) Expr {
 	eq := b.BinOp(token.EQL, tx, tabi)
 	if commaOk {
 		prog := b.Prog
-		t := prog.Tuple(assertedTyp, prog.Bool())
+		t := prog.Struct(assertedTyp, prog.Bool())
 		blks := b.Func.MakeBlocks(3)
 		b.If(eq, blks[0], blks[1])
 
 		b.SetBlockEx(blks[2], AtEnd, false)
 		phi := b.Phi(t)
-		phi.AddIncoming(b, blks[:2], func(i int) Expr {
+		phi.AddIncoming(b, blks[:2], func(i int, blk BasicBlock) Expr {
+			b.SetBlockEx(blk, AtEnd, false)
 			if i == 0 {
-				b.SetBlockEx(blks[0], AtEnd, false)
 				val := b.valFromData(assertedTyp, b.faceData(x.impl))
 				valTrue := aggregateValue(b.impl, t.ll, val.impl, prog.BoolVal(true).impl)
 				b.Jump(blks[2])
 				return Expr{valTrue, t}
 			}
-			b.SetBlockEx(blks[1], AtEnd, false)
 			zero := prog.Zero(assertedTyp)
 			valFalse := aggregateValue(b.impl, t.ll, zero.impl, prog.BoolVal(false).impl)
 			b.Jump(blks[2])
diff --git a/ssa/package.go b/ssa/package.go
index 6eb26db1..5df247db 100644
--- a/ssa/package.go
+++ b/ssa/package.go
@@ -19,6 +19,7 @@ package ssa
 import (
 	"go/token"
 	"go/types"
+	"strconv"
 	"unsafe"
 
 	"github.com/goplus/llgo/ssa/abi"
@@ -296,13 +297,13 @@ func (p Program) NewPackage(name, pkgPath string) Package {
 	return ret
 }
 
-// Tuple returns a tuple type.
-func (p Program) Tuple(typs ...Type) Type {
+// Struct returns a struct type.
+func (p Program) Struct(typs ...Type) Type {
 	els := make([]*types.Var, len(typs))
 	for i, t := range typs {
-		els[i] = types.NewParam(token.NoPos, nil, "", t.raw.Type)
+		els[i] = types.NewParam(token.NoPos, nil, "_llgo_f"+strconv.Itoa(i), t.raw.Type)
 	}
-	return p.rawType(types.NewTuple(els...))
+	return p.rawType(types.NewStruct(els, nil))
 }
 
 /*
diff --git a/ssa/ssa_test.go b/ssa/ssa_test.go
index 3e23e756..b6123bd3 100644
--- a/ssa/ssa_test.go
+++ b/ssa/ssa_test.go
@@ -109,9 +109,7 @@ func TestCvtType(t *testing.T) {
 }
 
 func TestUserdefExpr(t *testing.T) {
-	b := &phisExprTy{}
 	c := &pyVarTy{}
-	_ = b.String()
 	_ = c.String()
 	test := func(a types.Type) {
 		defer func() {
@@ -121,7 +119,6 @@ func TestUserdefExpr(t *testing.T) {
 		}()
 		a.Underlying()
 	}
-	test(b)
 	test(c)
 }
 
diff --git a/ssa/stmt_builder.go b/ssa/stmt_builder.go
index 8e2507de..178d6f3e 100644
--- a/ssa/stmt_builder.go
+++ b/ssa/stmt_builder.go
@@ -80,6 +80,7 @@ type InsertPoint int
 const (
 	AtEnd InsertPoint = iota
 	AtStart
+	BeforeLast
 	afterInit
 )
 
@@ -93,6 +94,8 @@ func (b Builder) SetBlockEx(blk BasicBlock, pos InsertPoint, setBlk bool) Builde
 		b.impl.SetInsertPointAtEnd(blk.last)
 	case AtStart:
 		b.impl.SetInsertPointBefore(blk.first.FirstInstruction())
+	case BeforeLast:
+		b.impl.SetInsertPointBefore(blk.last.LastInstruction())
 	case afterInit:
 		b.impl.SetInsertPointBefore(instrAfterInit(blk.first))
 	default:
diff --git a/ssa/type.go b/ssa/type.go
index ece67e4c..2b1f3608 100644
--- a/ssa/type.go
+++ b/ssa/type.go
@@ -53,7 +53,6 @@ const (
 	vkEface
 	vkIface
 	vkStruct
-	vkPhisExpr = -1
 )
 
 // -----------------------------------------------------------------------------