internal/cabi: check and skip param empty type

This commit is contained in:
visualfc
2025-08-15 21:29:43 +08:00
parent 28962a1c6c
commit 04bb3eb5a9
11 changed files with 444 additions and 14 deletions

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@@ -0,0 +1,54 @@
; ModuleID = '../../wrap/empty.c'
source_filename = "../../wrap/empty.c"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "amd64-unknown-linux-gnu"
%struct.empty = type {}
; Function Attrs: noinline nounwind optnone uwtable
define dso_local void @demo1() #0 {
%1 = alloca %struct.empty, align 1
%2 = alloca %struct.empty, align 1
%3 = bitcast %struct.empty* %1 to i8*
%4 = bitcast %struct.empty* %2 to i8*
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 1 %3, i8* align 1 %4, i64 0, i1 false)
ret void
}
; Function Attrs: argmemonly nofree nounwind willreturn
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg) #1
; Function Attrs: noinline nounwind optnone uwtable
define dso_local i32 @demo2(i32 noundef %0) #0 {
%2 = alloca %struct.empty, align 1
%3 = alloca i32, align 4
store i32 %0, i32* %3, align 4
%4 = load i32, i32* %3, align 4
ret i32 %4
}
; Function Attrs: noinline nounwind optnone uwtable
define dso_local i32 @demo3(i32 noundef %0, i32 noundef %1) #0 {
%3 = alloca %struct.empty, align 1
%4 = alloca i32, align 4
%5 = alloca i32, align 4
store i32 %0, i32* %4, align 4
store i32 %1, i32* %5, align 4
%6 = load i32, i32* %4, align 4
%7 = load i32, i32* %5, align 4
%8 = add nsw i32 %6, %7
ret i32 %8
}
attributes #0 = { noinline nounwind optnone uwtable "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { argmemonly nofree nounwind willreturn }
!llvm.module.flags = !{!0, !1, !2, !3, !4}
!llvm.ident = !{!5}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 7, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{i32 7, !"frame-pointer", i32 2}
!5 = !{!"Apple clang version 14.0.3 (clang-1403.0.22.14.1)"}

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@@ -0,0 +1,58 @@
; ModuleID = '../../wrap/empty.c'
source_filename = "../../wrap/empty.c"
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64-unknown-linux-gnu"
%struct.empty = type {}
; Function Attrs: noinline nounwind optnone uwtable
define dso_local void @demo1() #0 {
%1 = alloca %struct.empty, align 1
%2 = alloca %struct.empty, align 1
%3 = bitcast %struct.empty* %1 to i8*
%4 = bitcast %struct.empty* %2 to i8*
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 1 %3, i8* align 1 %4, i64 0, i1 false)
ret void
}
; Function Attrs: argmemonly nofree nounwind willreturn
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg) #1
; Function Attrs: noinline nounwind optnone uwtable
define dso_local i32 @demo2(i32 noundef %0) #0 {
%2 = alloca %struct.empty, align 1
%3 = alloca i32, align 4
store i32 %0, i32* %3, align 4
%4 = load i32, i32* %3, align 4
ret i32 %4
}
; Function Attrs: noinline nounwind optnone uwtable
define dso_local i32 @demo3(i32 noundef %0, i32 noundef %1) #0 {
%3 = alloca %struct.empty, align 1
%4 = alloca i32, align 4
%5 = alloca i32, align 4
store i32 %0, i32* %4, align 4
store i32 %1, i32* %5, align 4
%6 = load i32, i32* %4, align 4
%7 = load i32, i32* %5, align 4
%8 = add nsw i32 %6, %7
ret i32 %8
}
attributes #0 = { noinline nounwind optnone uwtable "frame-pointer"="non-leaf" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+neon,+v8a" }
attributes #1 = { argmemonly nofree nounwind willreturn }
!llvm.module.flags = !{!0, !1, !2, !3, !4, !5, !6, !7, !8}
!llvm.ident = !{!9}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"branch-target-enforcement", i32 0}
!2 = !{i32 8, !"sign-return-address", i32 0}
!3 = !{i32 8, !"sign-return-address-all", i32 0}
!4 = !{i32 8, !"sign-return-address-with-bkey", i32 0}
!5 = !{i32 7, !"PIC Level", i32 2}
!6 = !{i32 7, !"PIE Level", i32 2}
!7 = !{i32 7, !"uwtable", i32 2}
!8 = !{i32 7, !"frame-pointer", i32 1}
!9 = !{!"Apple clang version 14.0.3 (clang-1403.0.22.14.1)"}

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@@ -0,0 +1,58 @@
; ModuleID = '../../wrap/empty.c'
source_filename = "../../wrap/empty.c"
target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "armv6kz-unknown-linux-gnueabihf"
%struct.empty = type {}
; Function Attrs: noinline nounwind optnone
define dso_local void @demo1() #0 {
%1 = alloca %struct.empty, align 1
%2 = alloca %struct.empty, align 1
%3 = bitcast %struct.empty* %1 to i8*
%4 = bitcast %struct.empty* %2 to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 %3, i8* align 1 %4, i32 0, i1 false)
ret void
}
; Function Attrs: argmemonly nofree nounwind willreturn
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i32, i1 immarg) #1
; Function Attrs: noinline nounwind optnone
define dso_local i32 @demo2(i32 noundef %0) #0 {
%2 = alloca %struct.empty, align 1
%3 = alloca i32, align 4
store i32 %0, i32* %3, align 4
%4 = load i32, i32* %3, align 4
ret i32 %4
}
; Function Attrs: noinline nounwind optnone
define dso_local i32 @demo3(i32 noundef %0, i32 noundef %1) #0 {
%3 = alloca %struct.empty, align 1
%4 = alloca i32, align 4
%5 = alloca i32, align 4
store i32 %0, i32* %4, align 4
store i32 %1, i32* %5, align 4
%6 = load i32, i32* %4, align 4
%7 = load i32, i32* %5, align 4
%8 = add nsw i32 %6, %7
ret i32 %8
}
attributes #0 = { noinline nounwind optnone "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="arm1176jzf-s" "target-features"="+armv6kz,+dsp,+fp64,+strict-align,+vfp2,+vfp2sp,-aes,-d32,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fullfp16,-neon,-sha2,-thumb-mode,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp" }
attributes #1 = { argmemonly nofree nounwind willreturn }
!llvm.module.flags = !{!0, !1, !2, !3, !4, !5, !6, !7, !8}
!llvm.ident = !{!9}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 1, !"min_enum_size", i32 4}
!2 = !{i32 8, !"branch-target-enforcement", i32 0}
!3 = !{i32 8, !"sign-return-address", i32 0}
!4 = !{i32 8, !"sign-return-address-all", i32 0}
!5 = !{i32 8, !"sign-return-address-with-bkey", i32 0}
!6 = !{i32 7, !"PIC Level", i32 2}
!7 = !{i32 7, !"PIE Level", i32 2}
!8 = !{i32 7, !"frame-pointer", i32 2}
!9 = !{!"Apple clang version 14.0.3 (clang-1403.0.22.14.1)"}

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@@ -0,0 +1,57 @@
; ModuleID = '../../wrap/empty.c'
source_filename = "../../wrap/empty.c"
target datalayout = "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-f64:32:64-f80:32-n8:16:32-S128"
target triple = "i386-unknown-linux-gnu"
%struct.empty = type {}
; Function Attrs: noinline nounwind optnone uwtable
define dso_local void @demo1(%struct.empty* noalias sret(%struct.empty) align 1 %0) #0 {
%2 = alloca i8*, align 4
%3 = alloca %struct.empty, align 1
%4 = bitcast %struct.empty* %0 to i8*
store i8* %4, i8** %2, align 4
%5 = bitcast %struct.empty* %0 to i8*
%6 = bitcast %struct.empty* %3 to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 %5, i8* align 1 %6, i32 0, i1 false)
ret void
}
; Function Attrs: argmemonly nofree nounwind willreturn
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i32, i1 immarg) #1
; Function Attrs: noinline nounwind optnone uwtable
define dso_local i32 @demo2(i32 noundef %0) #0 {
%2 = alloca %struct.empty, align 1
%3 = alloca i32, align 4
store i32 %0, i32* %3, align 4
%4 = load i32, i32* %3, align 4
ret i32 %4
}
; Function Attrs: noinline nounwind optnone uwtable
define dso_local i32 @demo3(i32 noundef %0, i32 noundef %1) #0 {
%3 = alloca %struct.empty, align 1
%4 = alloca i32, align 4
%5 = alloca i32, align 4
store i32 %0, i32* %4, align 4
store i32 %1, i32* %5, align 4
%6 = load i32, i32* %4, align 4
%7 = load i32, i32* %5, align 4
%8 = add nsw i32 %6, %7
ret i32 %8
}
attributes #0 = { noinline nounwind optnone uwtable "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="pentium4" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { argmemonly nofree nounwind willreturn }
!llvm.module.flags = !{!0, !1, !2, !3, !4, !5}
!llvm.ident = !{!6}
!0 = !{i32 1, !"NumRegisterParameters", i32 0}
!1 = !{i32 1, !"wchar_size", i32 4}
!2 = !{i32 7, !"PIC Level", i32 2}
!3 = !{i32 7, !"PIE Level", i32 2}
!4 = !{i32 7, !"uwtable", i32 2}
!5 = !{i32 7, !"frame-pointer", i32 2}
!6 = !{!"Apple clang version 14.0.3 (clang-1403.0.22.14.1)"}

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@@ -0,0 +1,53 @@
; ModuleID = '../../wrap/empty.c'
source_filename = "../../wrap/empty.c"
target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n64-S128"
target triple = "riscv64-unknown-unknown-elf"
%struct.empty = type {}
; Function Attrs: noinline nounwind optnone
define dso_local void @demo1() #0 {
%1 = alloca %struct.empty, align 1
%2 = alloca %struct.empty, align 1
%3 = bitcast %struct.empty* %1 to i8*
%4 = bitcast %struct.empty* %2 to i8*
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 1 %3, i8* align 1 %4, i64 0, i1 false)
ret void
}
; Function Attrs: argmemonly nofree nounwind willreturn
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg) #1
; Function Attrs: noinline nounwind optnone
define dso_local signext i32 @demo2(i32 noundef signext %0) #0 {
%2 = alloca %struct.empty, align 1
%3 = alloca i32, align 4
store i32 %0, i32* %3, align 4
%4 = load i32, i32* %3, align 4
ret i32 %4
}
; Function Attrs: noinline nounwind optnone
define dso_local signext i32 @demo3(i32 noundef signext %0, i32 noundef signext %1) #0 {
%3 = alloca %struct.empty, align 1
%4 = alloca i32, align 4
%5 = alloca i32, align 4
store i32 %0, i32* %4, align 4
store i32 %1, i32* %5, align 4
%6 = load i32, i32* %4, align 4
%7 = load i32, i32* %5, align 4
%8 = add nsw i32 %6, %7
ret i32 %8
}
attributes #0 = { noinline nounwind optnone "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+64bit,+a,+c,+m,+relax,-save-restore" }
attributes #1 = { argmemonly nofree nounwind willreturn }
!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 1, !"target-abi", !"lp64"}
!2 = !{i32 7, !"frame-pointer", i32 2}
!3 = !{i32 1, !"SmallDataLimit", i32 8}
!4 = !{!"Apple clang version 14.0.3 (clang-1403.0.22.14.1)"}

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@@ -0,0 +1,50 @@
; ModuleID = '../../wrap/empty.c'
source_filename = "../../wrap/empty.c"
target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-f128:64-n32:64-S128-ni:1:10:20"
target triple = "wasm32-unknown-emscripten"
%struct.empty = type {}
; Function Attrs: noinline nounwind optnone
define hidden void @demo1() #0 {
%1 = alloca %struct.empty, align 1
%2 = alloca %struct.empty, align 1
%3 = bitcast %struct.empty* %1 to i8*
%4 = bitcast %struct.empty* %2 to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 %3, i8* align 1 %4, i32 0, i1 false)
ret void
}
; Function Attrs: argmemonly nofree nounwind willreturn
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i32, i1 immarg) #1
; Function Attrs: noinline nounwind optnone
define hidden i32 @demo2(i32 noundef %0) #0 {
%2 = alloca %struct.empty, align 1
%3 = alloca i32, align 4
store i32 %0, i32* %3, align 4
%4 = load i32, i32* %3, align 4
ret i32 %4
}
; Function Attrs: noinline nounwind optnone
define hidden i32 @demo3(i32 noundef %0, i32 noundef %1) #0 {
%3 = alloca %struct.empty, align 1
%4 = alloca i32, align 4
%5 = alloca i32, align 4
store i32 %0, i32* %4, align 4
store i32 %1, i32* %5, align 4
%6 = load i32, i32* %4, align 4
%7 = load i32, i32* %5, align 4
%8 = add nsw i32 %6, %7
ret i32 %8
}
attributes #0 = { noinline nounwind optnone "frame-pointer"="none" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="generic" }
attributes #1 = { argmemonly nofree nounwind willreturn }
!llvm.module.flags = !{!0}
!llvm.ident = !{!1}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{!"Apple clang version 14.0.3 (clang-1403.0.22.14.1)"}

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@@ -0,0 +1,57 @@
package main
import "unsafe"
const (
LLGoFiles = "../wrap/empty.c"
)
//go:linkname printf C.printf
func printf(format *byte, __llgo_va_list ...any) int32
func assert(info string, b bool) {
if !b {
printf(unsafe.StringData("Assertion failed: %s\n\000"), unsafe.StringData(info))
}
}
func main() {}
type empty struct {
}
//go:linkname cdemo1 C.demo1
func cdemo1(empty) empty
func demo1(a empty) empty {
return a
}
func init() {
assert("cdemo1", cdemo1(empty{}) == empty{})
assert("demo1", demo1(empty{}) == empty{})
}
//go:linkname cdemo2 C.demo2
func cdemo2(int32, empty) int32
func demo2(v int32, a empty) int32 {
return v
}
func init() {
assert("cdemo2", cdemo2(100, empty{}) == 100)
assert("demo2", demo2(100, empty{}) == 100)
}
//go:linkname cdemo3 C.demo3
func cdemo3(int32, empty, int32) int32
func demo3(v int32, a empty, v2 int32) int32 {
return v + v2
}
func init() {
assert("cdemo3", cdemo3(1, empty{}, 100) == 101)
assert("demo3", demo3(1, empty{}, 100) == 101)
}

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@@ -0,0 +1,14 @@
struct empty {
};
struct empty demo1(struct empty a) {
return a;
}
int demo2(int v, struct empty a) {
return v;
}
int demo3(int v, struct empty a, int v2) {
return v + v2;
}

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@@ -78,7 +78,6 @@ func (p *TypeInfoAmd64) GetTypeInfo(ctx llvm.Context, typ llvm.Type, bret bool)
if typ.TypeKind() == llvm.VoidTypeKind {
info.Kind = AttrVoid
return info
} else if typ.TypeKind() == llvm.PointerTypeKind {
}
info.Size = p.Sizeof(typ)
info.Align = p.Alignof(typ)

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@@ -128,11 +128,11 @@ type TypeInfoSys interface {
type AttrKind int
const (
AttrNone AttrKind = iota
AttrVoid // return type void
AttrPointer // type => type*
AttrWidthType // type => width int i16/i24/i32/i40/i48/i56/i64 float/double
AttrWidthType2 // type => width two int {i64,i16} float/double
AttrNone AttrKind = iota // keep org type
AttrVoid // return type void / param type void (size == 0) skip
AttrPointer // type => type*
AttrWidthType // type => width int i16/i24/i32/i40/i48/i56/i64 float/double
AttrWidthType2 // type => width two int {i64,i16} float/double
)
type FuncInfo struct {
@@ -146,7 +146,7 @@ func (p *FuncInfo) HasWrap() bool {
return true
}
for _, t := range p.Params {
if t.Kind > AttrVoid {
if t.Kind > AttrNone {
return true
}
}
@@ -178,6 +178,9 @@ func funcInlineHint(ctx llvm.Context) llvm.Attribute {
func (p *Transformer) IsWrapType(ctx llvm.Context, typ llvm.Type, bret bool) bool {
if p.sys != nil {
if !bret && (typ.TypeKind() == llvm.VoidTypeKind || p.Sizeof(typ) == 0) {
return true
}
return p.sys.IsWrapType(ctx, typ, bret)
}
return false
@@ -185,6 +188,14 @@ func (p *Transformer) IsWrapType(ctx llvm.Context, typ llvm.Type, bret bool) boo
func (p *Transformer) GetTypeInfo(ctx llvm.Context, typ llvm.Type, bret bool) *TypeInfo {
if p.sys != nil {
if typ.TypeKind() == llvm.VoidTypeKind {
return &TypeInfo{Type: typ, Kind: AttrVoid, Type1: ctx.VoidType()}
} else if p.Sizeof(typ) == 0 {
if bret {
return &TypeInfo{Type: typ, Kind: AttrNone, Type1: typ}
}
return &TypeInfo{Type: typ, Kind: AttrVoid, Type1: ctx.VoidType()}
}
return p.sys.GetTypeInfo(ctx, typ, bret)
}
panic("not implment: " + p.GOARCH)
@@ -228,6 +239,8 @@ func (p *Transformer) transformFuncType(ctx llvm.Context, info *FuncInfo) (llvm.
for _, ti := range info.Params {
switch ti.Kind {
case AttrVoid:
// skip
case AttrNone, AttrWidthType:
paramTypes = append(paramTypes, ti.Type1)
case AttrPointer:
@@ -294,9 +307,15 @@ func (p *Transformer) transformFuncBody(ctx llvm.Context, info *FuncInfo, fn llv
index++
}
for i, ti := range info.Params {
nv := params[index]
var nv llvm.Value
switch ti.Kind {
default:
nv = params[index]
case AttrVoid:
nv = llvm.ConstNull(ti.Type)
fn.Param(i).ReplaceAllUsesWith(nv)
// skip
continue
case AttrPointer:
nv = b.CreateLoad(ti.Type, params[index], "")
case AttrWidthType:
@@ -366,6 +385,8 @@ func (p *Transformer) transformCallInstr(ctx llvm.Context, call llvm.Value) bool
switch ti.Kind {
default:
nparams = append(nparams, param)
case AttrVoid:
// none
case AttrPointer:
ptr := llvm.CreateAlloca(b, ti.Type)
b.CreateStore(param, ptr)
@@ -510,6 +531,8 @@ func (p *Transformer) transformCallbackFunc(m llvm.Module, fn llvm.Value) (wrap
for _, ti := range info.Params {
switch ti.Kind {
default:
case AttrVoid:
// none
case AttrPointer:
nparams = append(nparams, b.CreateLoad(ti.Type, params[index], ""))
case AttrWidthType:

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@@ -128,7 +128,7 @@ func testFunc(t *testing.T, ctx context, td llvm.TargetData, fn llvm.Value, cfn
t.Fatalf("%v %v: bad param type %v != %v", ctx, fn.Name(), ft, cft)
}
for i, pt := range pts {
if !checkType(td, pt, cpts[i]) {
if !checkType(td, pt, cpts[i], false) {
t.Fatalf("%v %v: bad param type %v != %v", ctx, fn.Name(), ft, cft)
}
if i == 0 {
@@ -140,18 +140,25 @@ func testFunc(t *testing.T, ctx context, td llvm.TargetData, fn llvm.Value, cfn
t.Fatalf("%v %v: bad param attr type %v != %v", ctx, fn.Name(), ft, cft)
}
}
if !checkType(td, ft.ReturnType(), cft.ReturnType()) {
if !checkType(td, ft.ReturnType(), cft.ReturnType(), true) {
t.Fatalf("%v %v: bad return type %v != %v", ctx, fn.Name(), ft, cft)
}
}
func checkType(td llvm.TargetData, ft llvm.Type, cft llvm.Type) bool {
func checkType(td llvm.TargetData, ft llvm.Type, cft llvm.Type, bret bool) bool {
if ft == cft {
return true
}
if ft.TypeKind() == llvm.VoidTypeKind && cft.TypeKind() == llvm.VoidTypeKind {
if bret {
if ft.TypeKind() == llvm.VoidTypeKind && (cft.TypeKind() == llvm.VoidTypeKind || td.TypeAllocSize(cft) == 0) {
return true
} else if cft.TypeKind() == llvm.VoidTypeKind && (ft.TypeKind() == llvm.VoidTypeKind || td.TypeAllocSize(ft) == 0) {
return true
}
} else if ft.TypeKind() == llvm.VoidTypeKind && cft.TypeKind() == llvm.VoidTypeKind {
return true
} else if ft.TypeKind() == llvm.VoidTypeKind || cft.TypeKind() == llvm.VoidTypeKind {
}
if ft.TypeKind() == llvm.VoidTypeKind || cft.TypeKind() == llvm.VoidTypeKind {
return false
}
if td.ABITypeAlignment(ft) != td.ABITypeAlignment(cft) {
@@ -169,7 +176,7 @@ func checkType(td llvm.TargetData, ft llvm.Type, cft llvm.Type) bool {
return true
}
for i, t := range et {
if !checkType(td, t, cet[i]) {
if !checkType(td, t, cet[i], bret) {
return false
}
}