diff --git a/cl/_testgo/strucintf/out.ll b/cl/_testgo/strucintf/out.ll
index e69de29b..de0f7f58 100644
--- a/cl/_testgo/strucintf/out.ll
+++ b/cl/_testgo/strucintf/out.ll
@@ -0,0 +1,150 @@
+; ModuleID = 'main'
+source_filename = "main"
+
+%"github.com/goplus/llgo/internal/runtime.eface" = type { ptr, ptr }
+%"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 }
+
+@"main.init$guard" = global ptr null
+@__llgo_argc = global ptr null
+@__llgo_argv = global ptr null
+@"_llgo_struct$K-dZ9QotZfVPz2a0YdRa9vmZUuDXPTqZOlMShKEDJtk" = global ptr null
+@"main.struct$MYpsoM99ZwFY087IpUOkIw1zjBA_sgFXVodmn1m-G88" = global ptr null
+@0 = private unnamed_addr constant [12 x i8] c"Bar: not ok\00", align 1
+@1 = private unnamed_addr constant [10 x i8] c"F: not ok\00", align 1
+
+define void @main.init() {
+_llgo_0:
+  %0 = load i1, ptr @"main.init$guard", align 1
+  br i1 %0, label %_llgo_2, label %_llgo_1
+
+_llgo_1:                                          ; preds = %_llgo_0
+  store i1 true, ptr @"main.init$guard", align 1
+  call void @"github.com/goplus/llgo/_demo/interf/foo.init"()
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  ret void
+}
+
+define i32 @main(i32 %0, ptr %1) {
+_llgo_0:
+  store i32 %0, ptr @__llgo_argc, align 4
+  store ptr %1, ptr @__llgo_argv, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.init"()
+  call void @main.init()
+  %2 = alloca { i64 }, align 8
+  %3 = call ptr @"github.com/goplus/llgo/internal/runtime.Zeroinit"(ptr %2, i64 8)
+  %4 = call %"github.com/goplus/llgo/internal/runtime.eface" @"github.com/goplus/llgo/_demo/interf/foo.Bar"()
+  %5 = extractvalue %"github.com/goplus/llgo/internal/runtime.eface" %4, 0
+  %6 = load ptr, ptr @"_llgo_struct$K-dZ9QotZfVPz2a0YdRa9vmZUuDXPTqZOlMShKEDJtk", align 8
+  %7 = icmp eq ptr %5, %6
+  %8 = extractvalue %"github.com/goplus/llgo/internal/runtime.eface" %4, 1
+  %9 = ptrtoint ptr %8 to i64
+  %10 = alloca { i64 }, align 8
+  %11 = getelementptr inbounds { i64 }, ptr %10, i32 0, i32 0
+  store i64 %9, ptr %11, align 4
+  %12 = load { i64 }, ptr %10, align 4
+  %13 = alloca { { i64 }, i1 }, align 8
+  %14 = getelementptr inbounds { { i64 }, i1 }, ptr %13, i32 0, i32 0
+  store { i64 } %12, ptr %14, align 4
+  %15 = getelementptr inbounds { { i64 }, i1 }, ptr %13, i32 0, i32 1
+  store i1 true, ptr %15, align 1
+  %16 = load { { i64 }, i1 }, ptr %13, align 4
+  %17 = alloca { { i64 }, i1 }, align 8
+  %18 = getelementptr inbounds { { i64 }, i1 }, ptr %17, i32 0, i32 0
+  store { i64 } zeroinitializer, ptr %18, align 4
+  %19 = getelementptr inbounds { { i64 }, i1 }, ptr %17, i32 0, i32 1
+  store i1 false, ptr %19, align 1
+  %20 = load { { i64 }, i1 }, ptr %17, align 4
+  %21 = select i1 %7, { { i64 }, i1 } %16, { { i64 }, i1 } %20
+  %22 = extractvalue { { i64 }, i1 } %21, 0
+  store { i64 } %22, ptr %3, align 4
+  %23 = extractvalue { { i64 }, i1 } %21, 1
+  br i1 %23, label %_llgo_1, label %_llgo_3
+
+_llgo_1:                                          ; preds = %_llgo_0
+  %24 = getelementptr inbounds { i64 }, ptr %3, i32 0, i32 0
+  %25 = load i64, ptr %24, align 4
+  call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %25)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_3, %_llgo_1
+  %26 = alloca { i64 }, align 8
+  %27 = call ptr @"github.com/goplus/llgo/internal/runtime.Zeroinit"(ptr %26, i64 8)
+  %28 = call %"github.com/goplus/llgo/internal/runtime.eface" @"github.com/goplus/llgo/_demo/interf/foo.F"()
+  %29 = extractvalue %"github.com/goplus/llgo/internal/runtime.eface" %28, 0
+  %30 = load ptr, ptr @"main.struct$MYpsoM99ZwFY087IpUOkIw1zjBA_sgFXVodmn1m-G88", align 8
+  %31 = icmp eq ptr %29, %30
+  %32 = extractvalue %"github.com/goplus/llgo/internal/runtime.eface" %28, 1
+  %33 = ptrtoint ptr %32 to i64
+  %34 = alloca { i64 }, align 8
+  %35 = getelementptr inbounds { i64 }, ptr %34, i32 0, i32 0
+  store i64 %33, ptr %35, align 4
+  %36 = load { i64 }, ptr %34, align 4
+  %37 = alloca { { i64 }, i1 }, align 8
+  %38 = getelementptr inbounds { { i64 }, i1 }, ptr %37, i32 0, i32 0
+  store { i64 } %36, ptr %38, align 4
+  %39 = getelementptr inbounds { { i64 }, i1 }, ptr %37, i32 0, i32 1
+  store i1 true, ptr %39, align 1
+  %40 = load { { i64 }, i1 }, ptr %37, align 4
+  %41 = alloca { { i64 }, i1 }, align 8
+  %42 = getelementptr inbounds { { i64 }, i1 }, ptr %41, i32 0, i32 0
+  store { i64 } zeroinitializer, ptr %42, align 4
+  %43 = getelementptr inbounds { { i64 }, i1 }, ptr %41, i32 0, i32 1
+  store i1 false, ptr %43, align 1
+  %44 = load { { i64 }, i1 }, ptr %41, align 4
+  %45 = select i1 %31, { { i64 }, i1 } %40, { { i64 }, i1 } %44
+  %46 = extractvalue { { i64 }, i1 } %45, 0
+  store { i64 } %46, ptr %27, align 4
+  %47 = extractvalue { { i64 }, i1 } %45, 1
+  br i1 %47, label %_llgo_4, label %_llgo_6
+
+_llgo_3:                                          ; preds = %_llgo_0
+  %48 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %49 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %48, i32 0, i32 0
+  store ptr @0, ptr %49, align 8
+  %50 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %48, i32 0, i32 1
+  store i64 11, ptr %50, align 4
+  %51 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %48, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %51)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
+  br label %_llgo_2
+
+_llgo_4:                                          ; preds = %_llgo_2
+  %52 = getelementptr inbounds { i64 }, ptr %27, i32 0, i32 0
+  %53 = load i64, ptr %52, align 4
+  call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %53)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
+  br label %_llgo_5
+
+_llgo_5:                                          ; preds = %_llgo_6, %_llgo_4
+  ret i32 0
+
+_llgo_6:                                          ; preds = %_llgo_2
+  %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 @1, ptr %55, align 8
+  %56 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %54, i32 0, i32 1
+  store i64 9, ptr %56, align 4
+  %57 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %54, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %57)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
+  br label %_llgo_5
+}
+
+declare void @"github.com/goplus/llgo/_demo/interf/foo.init"()
+
+declare void @"github.com/goplus/llgo/internal/runtime.init"()
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.Zeroinit"(ptr, i64)
+
+declare %"github.com/goplus/llgo/internal/runtime.eface" @"github.com/goplus/llgo/_demo/interf/foo.Bar"()
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64)
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8)
+
+declare %"github.com/goplus/llgo/internal/runtime.eface" @"github.com/goplus/llgo/_demo/interf/foo.F"()
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String")
diff --git a/ssa/abi/abi.go b/ssa/abi/abi.go
index 14775932..05b09df6 100644
--- a/ssa/abi/abi.go
+++ b/ssa/abi/abi.go
@@ -36,41 +36,41 @@ const (
 	BitCast       // store other value (need bitcast) directly in the interface value
 )
 
-func KindOf(raw types.Type, is32Bits bool) (ret Kind) {
+func KindOf(raw types.Type, lvl int, is32Bits bool) (Kind, types.Type, int) {
 	switch t := raw.Underlying().(type) {
 	case *types.Basic:
 		kind := t.Kind()
 		switch {
 		case types.Bool <= kind && kind <= types.Uintptr:
 			if is32Bits && (kind == types.Int64 || kind == types.Uint64) {
-				return Indirect
+				return Indirect, raw, lvl
 			}
-			return Integer
+			return Integer, raw, lvl
 		case kind == types.Float32:
-			return BitCast
+			return BitCast, raw, lvl
 		case kind == types.Float64 || kind == types.Complex64:
 			if is32Bits {
-				return Indirect
+				return Indirect, raw, lvl
 			}
-			return BitCast
+			return BitCast, raw, lvl
 		case kind == types.UnsafePointer:
-			return Pointer
+			return Pointer, raw, lvl
 		}
 	case *types.Pointer, *types.Signature, *types.Map, *types.Chan:
-		return Pointer
+		return Pointer, raw, lvl
 	case *types.Struct:
 		if t.NumFields() == 1 {
-			return KindOf(t.Field(0).Type(), is32Bits)
+			return KindOf(t.Field(0).Type(), lvl+1, is32Bits)
 		}
 	case *types.Interface, *types.Slice:
 	case *types.Array:
 		if t.Len() == 1 {
-			return KindOf(t.Elem(), is32Bits)
+			return KindOf(t.Elem(), lvl+1, is32Bits)
 		}
 	default:
 		panic("unkown type")
 	}
-	return Indirect
+	return Indirect, raw, lvl
 }
 
 // -----------------------------------------------------------------------------
diff --git a/ssa/interface.go b/ssa/interface.go
index 51a7900b..ea06e88f 100644
--- a/ssa/interface.go
+++ b/ssa/interface.go
@@ -178,23 +178,43 @@ func (b Builder) makeIntfByIntptr(tinter Type, rawIntf *types.Interface, typ Typ
 	panic("todo")
 }
 
-func (b Builder) valFromData(t Type, data Expr) Expr {
-	kind := abi.KindOf(t.raw.Type, b.Prog.is32Bits)
+func (b Builder) valFromData(typ Type, data llvm.Value) Expr {
+	prog := b.Prog
+	kind, real, lvl := abi.KindOf(typ.raw.Type, 0, prog.is32Bits)
 	switch kind {
 	case abi.Indirect:
 		impl := b.impl
-		tll := t.ll
+		tll := typ.ll
 		tptr := llvm.PointerType(tll, 0)
-		ptr := llvm.CreatePointerCast(impl, data.impl, tptr)
-		return Expr{llvm.CreateLoad(impl, tll, ptr), t}
+		ptr := llvm.CreatePointerCast(impl, data, tptr)
+		return Expr{llvm.CreateLoad(impl, tll, ptr), typ}
 	case abi.Pointer:
-		return Expr{data.impl, t}
+		return Expr{data, typ}
+	}
+	t := typ
+	if lvl > 0 {
+		t = prog.rawType(real)
+	}
+	switch kind {
 	case abi.Integer:
-		x := castUintptr(b, data.impl, b.Prog.Uintptr())
-		return Expr{castInt(b, x, t), t}
+		x := castUintptr(b, data, prog.Uintptr())
+		return b.buildVal(typ, castInt(b, x, t), lvl)
 	case abi.BitCast:
-		x := castUintptr(b, data.impl, b.Prog.Uintptr())
-		return Expr{llvm.CreateBitCast(b.impl, x, t.ll), t}
+		x := castUintptr(b, data, prog.Uintptr())
+		return b.buildVal(typ, llvm.CreateBitCast(b.impl, x, t.ll), lvl)
+	}
+	panic("todo")
+}
+
+func (b Builder) buildVal(typ Type, val llvm.Value, lvl int) Expr {
+	if lvl == 0 {
+		return Expr{val, typ}
+	}
+	switch t := typ.raw.Type.Underlying().(type) {
+	case *types.Struct:
+		telem := b.Prog.rawType(t.Field(0).Type())
+		elem := b.buildVal(telem, val, lvl-1)
+		return Expr{aggregateValue(b.impl, typ.ll, elem.impl), typ}
 	}
 	panic("todo")
 }
@@ -248,7 +268,7 @@ func (b Builder) TypeAssert(x Expr, assertedTyp Type, commaOk bool) Expr {
 	if commaOk {
 		prog := b.Prog
 		t := prog.Tuple(assertedTyp, prog.Bool())
-		val := b.valFromData(assertedTyp, b.InterfaceData(x))
+		val := b.valFromData(assertedTyp, b.faceData(x.impl))
 		zero := prog.Zero(assertedTyp)
 		valTrue := aggregateValue(b.impl, t.ll, val.impl, prog.BoolVal(true).impl)
 		valFalse := aggregateValue(b.impl, t.ll, zero.impl, prog.BoolVal(false).impl)
@@ -259,7 +279,7 @@ func (b Builder) TypeAssert(x Expr, assertedTyp Type, commaOk bool) Expr {
 	b.SetBlock(blks[1])
 	b.Panic(b.Str("type assertion failed"))
 	b.SetBlock(blks[0])
-	return b.valFromData(assertedTyp, b.InterfaceData(x))
+	return b.valFromData(assertedTyp, b.faceData(x.impl))
 }
 
 /*
@@ -337,8 +357,11 @@ func (b Builder) InterfaceData(x Expr) Expr {
 	if debugInstr {
 		log.Printf("InterfaceData %v\n", x.impl)
 	}
-	ptr := llvm.CreateExtractValue(b.impl, x.impl, 1)
-	return Expr{ptr, b.Prog.VoidPtr()}
+	return Expr{b.faceData(x.impl), b.Prog.VoidPtr()}
+}
+
+func (b Builder) faceData(x llvm.Value) llvm.Value {
+	return llvm.CreateExtractValue(b.impl, x, 1)
 }
 
 func (b Builder) faceAbiType(x Expr) Expr {