cmd/compile: remove vestigial TDDDFIELD

Change-Id: I4a582f8efcf413665a7513c163334fa8d978a7e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/194437
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/cmd/compile/internal/gc/fmt.go

@@ -864,9 +864,6 @@ func typefmt(t *types.Type, flag FmtFlag, mode fmtMode, depth int) string {
 	case TUNSAFEPTR:
 		return "unsafe.Pointer"
 
-	case TDDDFIELD:
-		return mode.Sprintf("%v <%v> %v", t.Etype, t.Sym, t.DDDField())
-
 	case Txxx:
 		return "Txxx"
 	}

src/cmd/compile/internal/gc/types.go

@@ -54,8 +54,5 @@ const (
 	TFUNCARGS = types.TFUNCARGS
 	TCHANARGS = types.TCHANARGS
 
-	// pseudo-types for import/export
-	TDDDFIELD = types.TDDDFIELD // wrapper: contained type is a ... field
-
 	NTYPE = types.NTYPE
 )

src/cmd/compile/internal/types/etype_string.go

@@ -4,9 +4,52 @@ package types
 
 import "strconv"
 
-const _EType_name = "xxxINT8UINT8INT16UINT16INT32UINT32INT64UINT64INTUINTUINTPTRCOMPLEX64COMPLEX128FLOAT32FLOAT64BOOLPTRFUNCSLICEARRAYSTRUCTCHANMAPINTERFORWANYSTRINGUNSAFEPTRIDEALNILBLANKFUNCARGSCHANARGSDDDFIELDSSATUPLENTYPE"
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[Txxx-0]
+	_ = x[TINT8-1]
+	_ = x[TUINT8-2]
+	_ = x[TINT16-3]
+	_ = x[TUINT16-4]
+	_ = x[TINT32-5]
+	_ = x[TUINT32-6]
+	_ = x[TINT64-7]
+	_ = x[TUINT64-8]
+	_ = x[TINT-9]
+	_ = x[TUINT-10]
+	_ = x[TUINTPTR-11]
+	_ = x[TCOMPLEX64-12]
+	_ = x[TCOMPLEX128-13]
+	_ = x[TFLOAT32-14]
+	_ = x[TFLOAT64-15]
+	_ = x[TBOOL-16]
+	_ = x[TPTR-17]
+	_ = x[TFUNC-18]
+	_ = x[TSLICE-19]
+	_ = x[TARRAY-20]
+	_ = x[TSTRUCT-21]
+	_ = x[TCHAN-22]
+	_ = x[TMAP-23]
+	_ = x[TINTER-24]
+	_ = x[TFORW-25]
+	_ = x[TANY-26]
+	_ = x[TSTRING-27]
+	_ = x[TUNSAFEPTR-28]
+	_ = x[TIDEAL-29]
+	_ = x[TNIL-30]
+	_ = x[TBLANK-31]
+	_ = x[TFUNCARGS-32]
+	_ = x[TCHANARGS-33]
+	_ = x[TSSA-34]
+	_ = x[TTUPLE-35]
+	_ = x[NTYPE-36]
+}
 
-var _EType_index = [...]uint8{0, 3, 7, 12, 17, 23, 28, 34, 39, 45, 48, 52, 59, 68, 78, 85, 92, 96, 99, 103, 108, 113, 119, 123, 126, 131, 135, 138, 144, 153, 158, 161, 166, 174, 182, 190, 193, 198, 203}
+const _EType_name = "xxxINT8UINT8INT16UINT16INT32UINT32INT64UINT64INTUINTUINTPTRCOMPLEX64COMPLEX128FLOAT32FLOAT64BOOLPTRFUNCSLICEARRAYSTRUCTCHANMAPINTERFORWANYSTRINGUNSAFEPTRIDEALNILBLANKFUNCARGSCHANARGSSSATUPLENTYPE"
+
+var _EType_index = [...]uint8{0, 3, 7, 12, 17, 23, 28, 34, 39, 45, 48, 52, 59, 68, 78, 85, 92, 96, 99, 103, 108, 113, 119, 123, 126, 131, 135, 138, 144, 153, 158, 161, 166, 174, 182, 185, 190, 195}
 
 func (i EType) String() string {
 	if i >= EType(len(_EType_index)-1) {

src/cmd/compile/internal/types/sizeof_test.go

@@ -31,7 +31,6 @@ func TestSizeof(t *testing.T) {
 		{Interface{}, 8, 16},
 		{Chan{}, 8, 16},
 		{Array{}, 12, 16},
-		{DDDField{}, 4, 8},
 		{FuncArgs{}, 4, 8},
 		{ChanArgs{}, 4, 8},
 		{Ptr{}, 4, 8},

src/cmd/compile/internal/types/type.go

@@ -65,9 +65,6 @@ const (
 	TFUNCARGS
 	TCHANARGS
 
-	// pseudo-types for import/export
-	TDDDFIELD // wrapper: contained type is a ... field
-
 	// SSA backend types
 	TSSA   // internal types used by SSA backend (flags, memory, etc.)
 	TTUPLE // a pair of types, used by SSA backend
@@ -128,7 +125,6 @@ type Type struct {
 	// TFUNC: *Func
 	// TSTRUCT: *Struct
 	// TINTER: *Interface
-	// TDDDFIELD: DDDField
 	// TFUNCARGS: FuncArgs
 	// TCHANARGS: ChanArgs
 	// TCHAN: *Chan
@@ -305,11 +301,6 @@ type Ptr struct {
 	Elem *Type // element type
 }
 
-// DDDField contains Type fields specific to TDDDFIELD types.
-type DDDField struct {
-	T *Type // reference to a slice type for ... args
-}
-
 // ChanArgs contains Type fields specific to TCHANARGS types.
 type ChanArgs struct {
 	T *Type // reference to a chan type whose elements need a width check
@@ -470,8 +461,6 @@ func New(et EType) *Type {
 		t.Extra = ChanArgs{}
 	case TFUNCARGS:
 		t.Extra = FuncArgs{}
-	case TDDDFIELD:
-		t.Extra = DDDField{}
 	case TCHAN:
 		t.Extra = new(Chan)
 	case TTUPLE:
@@ -573,13 +562,6 @@ func NewPtr(elem *Type) *Type {
 	return t
 }
 
-// NewDDDField returns a new TDDDFIELD type for slice type s.
-func NewDDDField(s *Type) *Type {
-	t := New(TDDDFIELD)
-	t.Extra = DDDField{T: s}
-	return t
-}
-
 // NewChanArgs returns a new TCHANARGS type for channel type c.
 func NewChanArgs(c *Type) *Type {
 	t := New(TCHANARGS)
@@ -799,12 +781,6 @@ func (t *Type) Elem() *Type {
 	return nil
 }
 
-// DDDField returns the slice ... type for TDDDFIELD type t.
-func (t *Type) DDDField() *Type {
-	t.wantEtype(TDDDFIELD)
-	return t.Extra.(DDDField).T
-}
-
 // ChanArgs returns the channel type for TCHANARGS type t.
 func (t *Type) ChanArgs() *Type {
 	t.wantEtype(TCHANARGS)