diff --git a/cl/_testrt/named/in.go b/cl/_testrt/named/in.go
new file mode 100644
index 00000000..9a958d8d
--- /dev/null
+++ b/cl/_testrt/named/in.go
@@ -0,0 +1,39 @@
+package main
+
+import "github.com/goplus/llgo/internal/runtime/c"
+
+type mSpanList struct {
+	first *mspan
+	last  *mspan
+}
+
+type minfo struct {
+	span *mspan
+	info int
+}
+
+type mspan struct {
+	next  *mspan
+	prev  *mspan
+	list  *mSpanList
+	info  minfo
+	value int
+	check func(int) int
+}
+
+func main() {
+	m := &mspan{}
+	m.value = 100
+	m.next = &mspan{}
+	m.next.value = 200
+	m.list = &mSpanList{}
+	m.list.last = &mspan{}
+	m.list.last.value = 300
+	m.info.info = 10
+	m.info.span = m
+	m.check = func(n int) int {
+		return m.value * n
+	}
+	c.Printf(c.Str("%d %d %d %d %d %d\n"), m.next.value, m.list.last.value, m.info.info,
+		m.info.span.value, m.check(-2), m.info.span.check(-3))
+}
diff --git a/cl/_testrt/named/out.ll b/cl/_testrt/named/out.ll
new file mode 100644
index 00000000..e7d0af04
--- /dev/null
+++ b/cl/_testrt/named/out.ll
@@ -0,0 +1,143 @@
+; ModuleID = 'main'
+source_filename = "main"
+
+%main.mspan = type { ptr, ptr, ptr, %main.minfo, i64, { ptr, ptr } }
+%main.minfo = type { ptr, i64 }
+%main.mSpanList = type { ptr, ptr }
+
+@"main.init$guard" = global ptr null
+@__llgo_argc = global ptr null
+@__llgo_argv = global ptr null
+@0 = private unnamed_addr constant [19 x i8] c"%d %d %d %d %d %d\0A\00", align 1
+
+define void @main.init() {
+_llgo_0:
+  %0 = load i1, ptr @"main.init$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
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  ret void
+}
+
+define void @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 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 8)
+  %3 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 64)
+  store ptr %3, ptr %2, align 8
+  %4 = load ptr, ptr %2, align 8
+  %5 = getelementptr inbounds %main.mspan, ptr %4, i32 0, i32 4
+  store i64 100, ptr %5, align 4
+  %6 = load ptr, ptr %2, align 8
+  %7 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 64)
+  %8 = getelementptr inbounds %main.mspan, ptr %6, i32 0, i32 0
+  store ptr %7, ptr %8, align 8
+  %9 = load ptr, ptr %2, align 8
+  %10 = getelementptr inbounds %main.mspan, ptr %9, i32 0, i32 0
+  %11 = load ptr, ptr %10, align 8
+  %12 = getelementptr inbounds %main.mspan, ptr %11, i32 0, i32 4
+  store i64 200, ptr %12, align 4
+  %13 = load ptr, ptr %2, align 8
+  %14 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 16)
+  %15 = getelementptr inbounds %main.mspan, ptr %13, i32 0, i32 2
+  store ptr %14, ptr %15, align 8
+  %16 = load ptr, ptr %2, align 8
+  %17 = getelementptr inbounds %main.mspan, ptr %16, i32 0, i32 2
+  %18 = load ptr, ptr %17, align 8
+  %19 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 64)
+  %20 = getelementptr inbounds %main.mSpanList, ptr %18, i32 0, i32 1
+  store ptr %19, ptr %20, align 8
+  %21 = load ptr, ptr %2, align 8
+  %22 = getelementptr inbounds %main.mspan, ptr %21, i32 0, i32 2
+  %23 = load ptr, ptr %22, align 8
+  %24 = getelementptr inbounds %main.mSpanList, ptr %23, i32 0, i32 1
+  %25 = load ptr, ptr %24, align 8
+  %26 = getelementptr inbounds %main.mspan, ptr %25, i32 0, i32 4
+  store i64 300, ptr %26, align 4
+  %27 = load ptr, ptr %2, align 8
+  %28 = getelementptr inbounds %main.mspan, ptr %27, i32 0, i32 3
+  %29 = getelementptr inbounds %main.minfo, ptr %28, i32 0, i32 1
+  store i64 10, ptr %29, align 4
+  %30 = load ptr, ptr %2, align 8
+  %31 = getelementptr inbounds %main.mspan, ptr %30, i32 0, i32 3
+  %32 = load ptr, ptr %2, align 8
+  %33 = getelementptr inbounds %main.minfo, ptr %31, i32 0, i32 0
+  store ptr %32, ptr %33, align 8
+  %34 = load ptr, ptr %2, align 8
+  %35 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 8)
+  %36 = getelementptr inbounds { ptr }, ptr %35, i32 0, i32 0
+  store ptr %2, ptr %36, align 8
+  %37 = alloca { ptr, ptr }, align 8
+  %38 = getelementptr inbounds { ptr, ptr }, ptr %37, i32 0, i32 0
+  store ptr @"main.main$1", ptr %38, align 8
+  %39 = getelementptr inbounds { ptr, ptr }, ptr %37, i32 0, i32 1
+  store ptr %35, ptr %39, align 8
+  %40 = load { ptr, ptr }, ptr %37, align 8
+  %41 = getelementptr inbounds %main.mspan, ptr %34, i32 0, i32 5
+  store { ptr, ptr } %40, ptr %41, align 8
+  %42 = load ptr, ptr %2, align 8
+  %43 = getelementptr inbounds %main.mspan, ptr %42, i32 0, i32 0
+  %44 = load ptr, ptr %43, align 8
+  %45 = getelementptr inbounds %main.mspan, ptr %44, i32 0, i32 4
+  %46 = load i64, ptr %45, align 4
+  %47 = load ptr, ptr %2, align 8
+  %48 = getelementptr inbounds %main.mspan, ptr %47, i32 0, i32 2
+  %49 = load ptr, ptr %48, align 8
+  %50 = getelementptr inbounds %main.mSpanList, ptr %49, i32 0, i32 1
+  %51 = load ptr, ptr %50, align 8
+  %52 = getelementptr inbounds %main.mspan, ptr %51, i32 0, i32 4
+  %53 = load i64, ptr %52, align 4
+  %54 = load ptr, ptr %2, align 8
+  %55 = getelementptr inbounds %main.mspan, ptr %54, i32 0, i32 3
+  %56 = getelementptr inbounds %main.minfo, ptr %55, i32 0, i32 1
+  %57 = load i64, ptr %56, align 4
+  %58 = load ptr, ptr %2, align 8
+  %59 = getelementptr inbounds %main.mspan, ptr %58, i32 0, i32 3
+  %60 = getelementptr inbounds %main.minfo, ptr %59, i32 0, i32 0
+  %61 = load ptr, ptr %60, align 8
+  %62 = getelementptr inbounds %main.mspan, ptr %61, i32 0, i32 4
+  %63 = load i64, ptr %62, align 4
+  %64 = load ptr, ptr %2, align 8
+  %65 = getelementptr inbounds %main.mspan, ptr %64, i32 0, i32 5
+  %66 = load { ptr, ptr }, ptr %65, align 8
+  %67 = extractvalue { ptr, ptr } %66, 1
+  %68 = extractvalue { ptr, ptr } %66, 0
+  %69 = call i64 %68(ptr %67, i64 -2)
+  %70 = load ptr, ptr %2, align 8
+  %71 = getelementptr inbounds %main.mspan, ptr %70, i32 0, i32 3
+  %72 = getelementptr inbounds %main.minfo, ptr %71, i32 0, i32 0
+  %73 = load ptr, ptr %72, align 8
+  %74 = getelementptr inbounds %main.mspan, ptr %73, i32 0, i32 5
+  %75 = load { ptr, ptr }, ptr %74, align 8
+  %76 = extractvalue { ptr, ptr } %75, 1
+  %77 = extractvalue { ptr, ptr } %75, 0
+  %78 = call i64 %77(ptr %76, i64 -3)
+  %79 = call i32 (ptr, ...) @printf(ptr @0, i64 %46, i64 %53, i64 %57, i64 %63, i64 %69, i64 %78)
+  ret void
+}
+
+declare void @"github.com/goplus/llgo/internal/runtime.init"()
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64)
+
+define i64 @"main.main$1"(ptr %0, i64 %1) {
+_llgo_0:
+  %2 = load { ptr }, ptr %0, align 8
+  %3 = extractvalue { ptr } %2, 0
+  %4 = load ptr, ptr %3, align 8
+  %5 = getelementptr inbounds %main.mspan, ptr %4, i32 0, i32 4
+  %6 = load i64, ptr %5, align 4
+  %7 = mul i64 %6, %1
+  ret i64 %7
+}
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64)
+
+declare i32 @printf(ptr, ...)
diff --git a/ssa/package.go b/ssa/package.go
index ff5031a5..1ee6b8cf 100644
--- a/ssa/package.go
+++ b/ssa/package.go
@@ -106,6 +106,7 @@ type aProgram struct {
 	target *Target
 	td     llvm.TargetData
 	// tm  llvm.TargetMachine
+	named map[string]llvm.Type
 
 	intType   llvm.Type
 	int1Type  llvm.Type
@@ -154,7 +155,7 @@ func NewProgram(target *Target) Program {
 		// TODO(xsw): Finalize may cause panic, so comment it.
 		ctx.Finalize()
 	*/
-	return &aProgram{ctx: ctx, gocvt: newGoTypes(), target: target, td: td}
+	return &aProgram{ctx: ctx, gocvt: newGoTypes(), target: target, td: td, named: make(map[string]llvm.Type)}
 }
 
 // SetRuntime sets the runtime.
diff --git a/ssa/type.go b/ssa/type.go
index 6ec4c0a0..0c3e35ea 100644
--- a/ssa/type.go
+++ b/ssa/type.go
@@ -255,7 +255,11 @@ func (p Program) toType(raw types.Type) Type {
 }
 
 func (p Program) toLLVMNamedStruct(name string, raw *types.Struct) llvm.Type {
+	if typ, ok := p.named[name]; ok {
+		return typ
+	}
 	t := p.ctx.StructCreateNamed(name)
+	p.named[name] = t
 	fields := p.toLLVMFields(raw)
 	t.StructSetBody(fields, false)
 	return t
diff --git a/ssa/type_cvt.go b/ssa/type_cvt.go
index d6691f1e..e9cbe538 100644
--- a/ssa/type_cvt.go
+++ b/ssa/type_cvt.go
@@ -26,12 +26,14 @@ import (
 // -----------------------------------------------------------------------------
 
 type goTypes struct {
-	typs map[unsafe.Pointer]unsafe.Pointer
+	typs  map[unsafe.Pointer]unsafe.Pointer
+	named map[string]*types.Named
 }
 
 func newGoTypes() goTypes {
 	typs := make(map[unsafe.Pointer]unsafe.Pointer)
-	return goTypes{typs}
+	named := make(map[string]*types.Named)
+	return goTypes{typs, named}
 }
 
 type Background int
@@ -115,10 +117,16 @@ func (p goTypes) cvtNamed(t *types.Named) (raw *types.Named, cvt bool) {
 	defer func() {
 		p.typs[unsafe.Pointer(t)] = unsafe.Pointer(raw)
 	}()
+	id := t.String()
+	if named, ok := p.named[id]; ok {
+		return named, false
+	}
+	named := types.NewNamed(t.Obj(), types.Typ[types.Int], nil)
+	p.named[id] = named
+	defer delete(p.named, id)
 	if tund, cvt := p.cvtType(t.Underlying()); cvt {
-		old := t.Obj()
-		obj := types.NewTypeName(old.Pos(), old.Pkg(), old.Name(), nil)
-		return types.NewNamed(obj, tund, nil), true
+		named.SetUnderlying(tund)
+		return named, true
 	}
 	return t, false
 }