diff --git a/cl/_testgo/equal/out.ll b/cl/_testgo/equal/out.ll
index 3502028b..acc08baa 100644
--- a/cl/_testgo/equal/out.ll
+++ b/cl/_testgo/equal/out.ll
@@ -497,7 +497,7 @@ _llgo_9:                                          ; preds = %_llgo_8
   %19 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %18, 0
   %20 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %19, i64 0, 1
   %21 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %20, i64 0, 2
-  %22 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @3, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %21)
+  %22 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @3, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %21)
   store ptr %22, ptr @_llgo_any, align 8
   br label %_llgo_10
 
@@ -518,7 +518,7 @@ _llgo_11:                                         ; preds = %_llgo_10
   %33 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %32, 0
   %34 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %33, i64 0, 1
   %35 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %34, i64 0, 2
-  %36 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @3, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %35)
+  %36 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @3, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %35)
   %37 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @8, i64 1 }, ptr %36, i64 32, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, i1 false)
   %38 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 224)
   %39 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %38, i64 0
@@ -630,7 +630,7 @@ declare %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/l
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.NewNamed"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", i64, i64, i64, i64)
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
 
 declare void @"github.com/goplus/llgo/internal/runtime.InitNamed"(ptr, ptr, %"github.com/goplus/llgo/internal/runtime.Slice", %"github.com/goplus/llgo/internal/runtime.Slice")
 
diff --git a/cl/_testgo/errors/out.ll b/cl/_testgo/errors/out.ll
index 265da252..3a93baf5 100644
--- a/cl/_testgo/errors/out.ll
+++ b/cl/_testgo/errors/out.ll
@@ -161,7 +161,7 @@ _llgo_5:                                          ; preds = %_llgo_4
   %44 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %42, 0
   %45 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %44, i64 1, 1
   %46 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %45, i64 1, 2
-  %47 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %46)
+  %47 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %46)
   store ptr %47, ptr @"_llgo_iface$Fh8eUJ-Gw4e6TYuajcFIOSCuqSPKAt5nS4ow7xeGXEU", align 8
   br label %_llgo_6
 
@@ -187,7 +187,7 @@ declare void @"github.com/goplus/llgo/internal/runtime.SetDirectIface"(ptr)
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.PointerTo"(ptr)
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.NewItab"(ptr, ptr)
 
diff --git a/cl/_testgo/ifaceconv/out.ll b/cl/_testgo/ifaceconv/out.ll
index 127bf889..c1c7cc96 100644
--- a/cl/_testgo/ifaceconv/out.ll
+++ b/cl/_testgo/ifaceconv/out.ll
@@ -556,7 +556,7 @@ _llgo_12:                                         ; preds = %_llgo_11, %_llgo_10
   %35 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %33, 0
   %36 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %35, i64 1, 1
   %37 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %36, i64 1, 2
-  %38 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %37)
+  %38 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %37)
   store ptr %38, ptr @"main.iface$brpgdLtIeRlPi8QUoTgPCXzlehUkncg7v9aITo-GsF4", align 8
   %39 = call ptr @"github.com/goplus/llgo/internal/runtime.NewNamedInterface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" { ptr @6, i64 2 })
   %40 = load ptr, ptr @_llgo_main.I2, align 8
@@ -599,7 +599,7 @@ _llgo_16:                                         ; preds = %_llgo_15, %_llgo_14
   %59 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %56, 0
   %60 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %59, i64 2, 1
   %61 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %60, i64 2, 2
-  %62 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %61)
+  %62 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %61)
   store ptr %62, ptr @"main.iface$gZBF8fFlqIMZ9M6lT2VWPyc3eu5Co6j0WoKGIEgDPAw", align 8
   %63 = call ptr @"github.com/goplus/llgo/internal/runtime.NewNamed"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" { ptr @9, i64 2 }, i64 25, i64 0, i64 1, i64 1)
   %64 = load ptr, ptr @_llgo_main.C1, align 8
@@ -721,7 +721,7 @@ declare ptr @"github.com/goplus/llgo/internal/runtime.Func"(%"github.com/goplus/
 
 declare void @"github.com/goplus/llgo/internal/runtime.SetDirectIface"(ptr)
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.NewItab"(ptr, ptr)
 
diff --git a/cl/_testgo/ifaceprom/out.ll b/cl/_testgo/ifaceprom/out.ll
index 64cd3438..664638b3 100644
--- a/cl/_testgo/ifaceprom/out.ll
+++ b/cl/_testgo/ifaceprom/out.ll
@@ -563,7 +563,7 @@ _llgo_10:                                         ; preds = %_llgo_9, %_llgo_8
   %76 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %73, 0
   %77 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %76, i64 2, 1
   %78 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %77, i64 2, 2
-  %79 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @1, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %78)
+  %79 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @1, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %78)
   store ptr %79, ptr @"main.iface$zZ89tENb5h_KNjvpxf1TXPfaWFYn0IZrZwyVf42lRtA", align 8
   %80 = call ptr @"github.com/goplus/llgo/internal/runtime.NewNamedInterface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @1, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" { ptr @6, i64 1 })
   %81 = load ptr, ptr @_llgo_main.I, align 8
@@ -613,7 +613,7 @@ declare ptr @"github.com/goplus/llgo/internal/runtime.Func"(%"github.com/goplus/
 
 declare void @"github.com/goplus/llgo/internal/runtime.SetDirectIface"(ptr)
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.NewItab"(ptr, ptr)
 
diff --git a/cl/_testgo/interface/out.ll b/cl/_testgo/interface/out.ll
index 7ab39e50..8aab03d4 100644
--- a/cl/_testgo/interface/out.ll
+++ b/cl/_testgo/interface/out.ll
@@ -441,7 +441,7 @@ _llgo_28:                                         ; preds = %_llgo_27, %_llgo_26
   %120 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %117, 0
   %121 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %120, i64 2, 1
   %122 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %121, i64 2, 2
-  %123 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %122)
+  %123 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %122)
   store ptr %123, ptr @"main.iface$sO8a1LvuUsjXwiwaC6sR9-L4DiYgiOnZi7iosyShJXg", align 8
   ret void
 }
@@ -468,7 +468,7 @@ declare void @"github.com/goplus/llgo/internal/runtime.InitNamedInterface"(ptr,
 
 declare i1 @"github.com/goplus/llgo/internal/runtime.Implements"(ptr, ptr)
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.NewItab"(ptr, ptr)
 
diff --git a/cl/_testgo/invoke/out.ll b/cl/_testgo/invoke/out.ll
index 9080bdff..3ec87a22 100644
--- a/cl/_testgo/invoke/out.ll
+++ b/cl/_testgo/invoke/out.ll
@@ -606,7 +606,7 @@ _llgo_13:                                         ; preds = %_llgo_6
   %72 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %70, 0
   %73 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %72, i64 1, 1
   %74 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %73, i64 1, 2
-  %75 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @8, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %74)
+  %75 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @8, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %74)
   store ptr %75, ptr @"_llgo_iface$uRUteI7wmSy7y7ODhGzk0FdDaxGKMhVSSu6HZEv9aa0", align 8
   br label %_llgo_14
 
@@ -1004,7 +1004,7 @@ _llgo_61:                                         ; preds = %_llgo_60
   %275 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %272, 0
   %276 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %275, i64 2, 1
   %277 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %276, i64 2, 2
-  %278 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @8, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %277)
+  %278 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @8, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %277)
   store ptr %278, ptr @"_llgo_iface$jwmSdgh1zvY_TDIgLzCkvkbiyrdwl9N806DH0JGcyMI", align 8
   br label %_llgo_62
 
@@ -1043,7 +1043,7 @@ _llgo_67:                                         ; preds = %_llgo_66
   %292 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %291, 0
   %293 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %292, i64 0, 1
   %294 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %293, i64 0, 2
-  %295 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @8, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %294)
+  %295 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @8, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %294)
   store ptr %295, ptr @_llgo_any, align 8
   br label %_llgo_68
 
@@ -1067,7 +1067,7 @@ declare ptr @"github.com/goplus/llgo/internal/runtime.Func"(%"github.com/goplus/
 
 declare void @"github.com/goplus/llgo/internal/runtime.SetDirectIface"(ptr)
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.NewItab"(ptr, ptr)
 
diff --git a/cl/_testgo/reader/out.ll b/cl/_testgo/reader/out.ll
index 57145f4d..465752fe 100644
--- a/cl/_testgo/reader/out.ll
+++ b/cl/_testgo/reader/out.ll
@@ -1154,7 +1154,7 @@ _llgo_29:                                         ; preds = %_llgo_28
   %106 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %104, 0
   %107 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %106, i64 1, 1
   %108 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %107, i64 1, 2
-  %109 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %108)
+  %109 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %108)
   store ptr %109, ptr @"_llgo_iface$eN81k1zqixGTyagHw_4nqH4mGfwwehTOCTXUlbT9kzk", align 8
   br label %_llgo_30
 
@@ -1288,7 +1288,7 @@ _llgo_39:                                         ; preds = %_llgo_38
   %191 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %188, 0
   %192 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %191, i64 2, 1
   %193 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %192, i64 2, 2
-  %194 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %193)
+  %194 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %193)
   store ptr %194, ptr @"_llgo_iface$L2Ik-AJcd0jsoBw5fQ07pQpfUM-kh78Wn2bOeak6M3I", align 8
   br label %_llgo_40
 
@@ -1393,7 +1393,7 @@ _llgo_47:                                         ; preds = %_llgo_46
   %256 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %254, 0
   %257 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %256, i64 1, 1
   %258 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %257, i64 1, 2
-  %259 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %258)
+  %259 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %258)
   store ptr %259, ptr @"_llgo_iface$Ly4zXiUMEac-hYAMw6b6miJ1JEhGfLyBWyBOhpsRZcU", align 8
   br label %_llgo_48
 
@@ -1673,7 +1673,7 @@ _llgo_63:                                         ; preds = %_llgo_62
   %440 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %438, 0
   %441 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %440, i64 1, 1
   %442 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %441, i64 1, 2
-  %443 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %442)
+  %443 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %442)
   store ptr %443, ptr @"_llgo_iface$OFO8Us9n8ajWCabGedeuoJ-Za2zAMk4Jh0FunAcUCFE", align 8
   br label %_llgo_64
 
@@ -1719,7 +1719,7 @@ _llgo_65:                                         ; preds = %_llgo_64
   %471 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %469, 0
   %472 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %471, i64 1, 1
   %473 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %472, i64 1, 2
-  %474 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %473)
+  %474 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %473)
   store ptr %474, ptr @"_llgo_iface$Fh8eUJ-Gw4e6TYuajcFIOSCuqSPKAt5nS4ow7xeGXEU", align 8
   br label %_llgo_66
 
@@ -1743,7 +1743,7 @@ declare void @"github.com/goplus/llgo/internal/runtime.InitNamedInterface"(ptr,
 
 declare i1 @"github.com/goplus/llgo/internal/runtime.Implements"(ptr, ptr)
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.NewItab"(ptr, ptr)
 
diff --git a/cl/_testgo/reflect/out.ll b/cl/_testgo/reflect/out.ll
index 36b0b9a1..22d9b9ee 100644
--- a/cl/_testgo/reflect/out.ll
+++ b/cl/_testgo/reflect/out.ll
@@ -1159,7 +1159,7 @@ _llgo_15:                                         ; preds = %_llgo_14
   %78 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %76, 0
   %79 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %78, i64 1, 1
   %80 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %79, i64 1, 2
-  %81 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @3, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %80)
+  %81 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @3, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %80)
   store ptr %81, ptr @"_llgo_iface$VdBKYV8-gcMjZtZfcf-u2oKoj9Lu3VXwuG8TGCW2S4A", align 8
   br label %_llgo_16
 
@@ -1173,7 +1173,7 @@ _llgo_17:                                         ; preds = %_llgo_16
   %85 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %84, 0
   %86 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %85, i64 0, 1
   %87 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %86, i64 0, 2
-  %88 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @3, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %87)
+  %88 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @3, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %87)
   store ptr %88, ptr @_llgo_any, align 8
   br label %_llgo_18
 
@@ -1187,7 +1187,7 @@ _llgo_19:                                         ; preds = %_llgo_18
   %92 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %91, 0
   %93 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %92, i64 0, 1
   %94 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %93, i64 0, 2
-  %95 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @3, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %94)
+  %95 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @3, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %94)
   %96 = call ptr @"github.com/goplus/llgo/internal/runtime.SliceOf"(ptr %95)
   store ptr %96, ptr @"[]_llgo_any", align 8
   br label %_llgo_20
@@ -1390,7 +1390,7 @@ declare void @"github.com/goplus/llgo/internal/runtime.InitNamed"(ptr, ptr, %"gi
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.PointerTo"(ptr)
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.NewItab"(ptr, ptr)
 
diff --git a/cl/_testrt/makemap/out.ll b/cl/_testrt/makemap/out.ll
index b205df40..fac1e3c0 100644
--- a/cl/_testrt/makemap/out.ll
+++ b/cl/_testrt/makemap/out.ll
@@ -964,7 +964,7 @@ _llgo_9:                                          ; preds = %_llgo_8
   %59 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %58, 0
   %60 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %59, i64 0, 1
   %61 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %60, i64 0, 2
-  %62 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @4, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %61)
+  %62 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @4, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %61)
   store ptr %62, ptr @_llgo_any, align 8
   br label %_llgo_10
 
@@ -978,7 +978,7 @@ _llgo_11:                                         ; preds = %_llgo_10
   %66 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %65, 0
   %67 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %66, i64 0, 1
   %68 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %67, i64 0, 2
-  %69 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @4, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %68)
+  %69 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @4, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %68)
   %70 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 34)
   %71 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 40)
   %72 = call ptr @"github.com/goplus/llgo/internal/runtime.ArrayOf"(i64 8, ptr %71)
@@ -987,7 +987,7 @@ _llgo_11:                                         ; preds = %_llgo_10
   %75 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %74, 0
   %76 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %75, i64 0, 1
   %77 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %76, i64 0, 2
-  %78 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @4, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %77)
+  %78 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @4, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %77)
   %79 = call ptr @"github.com/goplus/llgo/internal/runtime.ArrayOf"(i64 8, ptr %78)
   %80 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @1, i64 4 }, ptr %79, i64 8, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, i1 false)
   %81 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 34)
@@ -1313,7 +1313,7 @@ declare void @"github.com/goplus/llgo/internal/runtime.MapDelete"(ptr, ptr, ptr)
 
 declare void @"github.com/goplus/llgo/internal/runtime.Panic"(%"github.com/goplus/llgo/internal/runtime.eface")
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
 
 ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
 declare void @llvm.memset(ptr nocapture writeonly, i8, i64, i1 immarg) #0
diff --git a/cl/_testrt/tpabi/out.ll b/cl/_testrt/tpabi/out.ll
index b360728f..bc5237ae 100644
--- a/cl/_testrt/tpabi/out.ll
+++ b/cl/_testrt/tpabi/out.ll
@@ -286,7 +286,7 @@ _llgo_13:                                         ; preds = %_llgo_12
   %66 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %64, 0
   %67 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %66, i64 1, 1
   %68 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %67, i64 1, 2
-  %69 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @1, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %68)
+  %69 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @1, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %68)
   store ptr %69, ptr @"_llgo_iface$BP0p_lUsEd-IbbtJVukGmgrdQkqzcoYzSiwgUvgFvUs", align 8
   br label %_llgo_14
 
@@ -320,7 +320,7 @@ declare ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64)
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.PointerTo"(ptr)
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.NewItab"(ptr, ptr)
 
diff --git a/cl/_testrt/tpmap/out.ll b/cl/_testrt/tpmap/out.ll
index 92acc106..58ccc9c8 100644
--- a/cl/_testrt/tpmap/out.ll
+++ b/cl/_testrt/tpmap/out.ll
@@ -208,7 +208,7 @@ _llgo_13:                                         ; preds = %_llgo_12
   %28 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %27, 0
   %29 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %28, i64 0, 1
   %30 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %29, i64 0, 2
-  %31 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %30)
+  %31 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %30)
   store ptr %31, ptr @_llgo_any, align 8
   br label %_llgo_14
 
@@ -218,7 +218,7 @@ _llgo_14:                                         ; preds = %_llgo_13, %_llgo_12
   %34 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %33, 0
   %35 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %34, i64 0, 1
   %36 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %35, i64 0, 2
-  %37 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %36)
+  %37 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @0, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %36)
   %38 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @4, i64 1 }, ptr %37, i64 0, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, i1 false)
   %39 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 56)
   %40 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %39, i64 0
@@ -344,7 +344,7 @@ declare %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/l
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64)
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.PointerTo"(ptr)
 
diff --git a/cl/_testrt/tpmethod/out.ll b/cl/_testrt/tpmethod/out.ll
index 2ca867f9..a11bcdf2 100644
--- a/cl/_testrt/tpmethod/out.ll
+++ b/cl/_testrt/tpmethod/out.ll
@@ -477,7 +477,7 @@ _llgo_21:                                         ; preds = %_llgo_20
   %196 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" undef, ptr %194, 0
   %197 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %196, i64 1, 1
   %198 = insertvalue %"github.com/goplus/llgo/internal/runtime.Slice" %197, i64 1, 2
-  %199 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @1, i64 4 }, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %198)
+  %199 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" { ptr @1, i64 4 }, %"github.com/goplus/llgo/internal/runtime.Slice" %198)
   store ptr %199, ptr @"_llgo_iface$siNiE0pGpvdoyzPUhSP4dREmGht9v7Axb0C9hezIyDM", align 8
   br label %_llgo_22
 
@@ -507,7 +507,7 @@ declare void @"github.com/goplus/llgo/internal/runtime.InitNamed"(ptr, ptr, %"gi
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.PointerTo"(ptr)
 
-declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.NewItab"(ptr, ptr)
 
diff --git a/internal/runtime/z_face.go b/internal/runtime/z_face.go
index c9c93c65..333738d7 100644
--- a/internal/runtime/z_face.go
+++ b/internal/runtime/z_face.go
@@ -211,7 +211,6 @@ func Func(in, out []*Type, variadic bool) *FuncType {
 			Align_:      uint8(pointerAlign),
 			FieldAlign_: uint8(pointerAlign),
 			Kind_:       uint8(abi.Func),
-			Str_:        "func(...)",
 		},
 		In:  in,
 		Out: out,
@@ -219,9 +218,12 @@ func Func(in, out []*Type, variadic bool) *FuncType {
 	if variadic {
 		ret.TFlag |= abi.TFlagVariadic
 	}
+	ret.Str_ = funcStr(ret)
 	return ret
 }
 
+// NewNamedInterface returns an interface type.
+// Don't call NewNamed for named interface type.
 func NewNamedInterface(pkgPath, name string) *InterfaceType {
 	if pkgPath != "" {
 		name = pkgName(pkgPath) + "." + name
@@ -263,9 +265,7 @@ func InitNamedInterface(ret *InterfaceType, methods []Imethod) {
 	}
 }
 
-// Interface returns an interface type.
-// Don't call NewNamed for named interface type.
-func Interface(pkgPath, name string, methods []Imethod) *InterfaceType {
+func Interface(pkgPath string, methods []Imethod) *InterfaceType {
 	ret := &abi.InterfaceType{
 		Type: Type{
 			Size_:       unsafe.Sizeof(eface{}),
@@ -274,7 +274,6 @@ func Interface(pkgPath, name string, methods []Imethod) *InterfaceType {
 			Align_:      uint8(pointerAlign),
 			FieldAlign_: uint8(pointerAlign),
 			Kind_:       uint8(abi.Interface),
-			Str_:        name,
 		},
 		PkgPath_: pkgPath,
 		Methods:  methods,
@@ -284,6 +283,7 @@ func Interface(pkgPath, name string, methods []Imethod) *InterfaceType {
 	} else {
 		ret.Equal = interequal
 	}
+	ret.Str_ = interfaceStr(ret)
 	return ret
 }
 
@@ -482,4 +482,55 @@ func SetClosure(t *abi.Type) {
 	t.TFlag |= abi.TFlagClosure
 }
 
+func interfaceStr(ft *abi.InterfaceType) string {
+	repr := make([]byte, 0, 64)
+	repr = append(repr, "interface {"...)
+	for i, t := range ft.Methods {
+		if i > 0 {
+			repr = append(repr, "; "...)
+		}
+		repr = append(repr, ' ')
+		repr = append(repr, t.Name_...)
+		repr = append(repr, t.Typ_.String()[4:]...)
+	}
+	if len(ft.Methods) > 0 {
+		repr = append(repr, ' ')
+	}
+	repr = append(repr, '}')
+	return string(repr)
+}
+
+func funcStr(ft *abi.FuncType) string {
+	repr := make([]byte, 0, 64)
+	repr = append(repr, "func("...)
+	for i, t := range ft.In {
+		if i > 0 {
+			repr = append(repr, ", "...)
+		}
+		if ft.Variadic() && i == len(ft.In)-1 {
+			repr = append(repr, "..."...)
+			repr = append(repr, (*abi.SliceType)(unsafe.Pointer(t)).Elem.String()...)
+		} else {
+			repr = append(repr, t.String()...)
+		}
+	}
+	repr = append(repr, ')')
+	out := ft.Out
+	if len(out) == 1 {
+		repr = append(repr, ' ')
+	} else if len(out) > 1 {
+		repr = append(repr, " ("...)
+	}
+	for i, t := range out {
+		if i > 0 {
+			repr = append(repr, ", "...)
+		}
+		repr = append(repr, t.String()...)
+	}
+	if len(out) > 1 {
+		repr = append(repr, ')')
+	}
+	return string(repr)
+}
+
 // -----------------------------------------------------------------------------
diff --git a/internal/runtime/z_type.go b/internal/runtime/z_type.go
index 1440f842..f46fbe29 100644
--- a/internal/runtime/z_type.go
+++ b/internal/runtime/z_type.go
@@ -272,7 +272,7 @@ func ArrayOf(length uintptr, elem *Type) *Type {
 			Align_:      elem.Align_,
 			FieldAlign_: elem.FieldAlign_,
 			Kind_:       uint8(abi.Array),
-			Str_:        "[...]" + elem.String(), // TODO(xsw): itoa
+			Str_:        "[" + string(itoa(make([]byte, 20), uint64(length))) + "]" + elem.String(),
 		},
 		Elem:  elem,
 		Slice: SliceOf(elem),
diff --git a/ssa/abitype.go b/ssa/abitype.go
index a338f84e..9bd329e4 100644
--- a/ssa/abitype.go
+++ b/ssa/abitype.go
@@ -187,7 +187,7 @@ func (b Builder) abiInterfaceOf(t *types.Interface) func() Expr {
 		fn := pkg.rtFunc("Interface")
 		tSlice := lastParamType(prog, fn)
 		methodSlice := b.SliceLit(tSlice, methods...)
-		return b.Call(fn, b.Str(pkg.Path()), b.Str(""), methodSlice)
+		return b.Call(fn, b.Str(pkg.Path()), methodSlice)
 	}
 }