cmd/compile/internal/types: shorten struct type names

They are in the types package, no need to mention the Type suffix.

Change-Id: Ie4fe1e3c1793514145e33f9df373d715f63e1aad
Reviewed-on: https://go-review.googlesource.com/39911
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

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

@@ -58,7 +58,7 @@ func expandiface(t *types.Type) {
 
 	// Access fields directly to avoid recursively calling dowidth
 	// within Type.Fields().
-	t.Extra.(*types.InterType).Fields.Set(fields)
+	t.Extra.(*types.Interface).Fields.Set(fields)
 }
 
 func offmod(t *types.Type) {
@@ -337,7 +337,7 @@ func dowidth(t *types.Type) {
 		w = widstruct(t1, t1.Recvs(), 0, 0)
 		w = widstruct(t1, t1.Params(), w, Widthreg)
 		w = widstruct(t1, t1.Results(), w, Widthreg)
-		t1.Extra.(*types.FuncType).Argwid = w
+		t1.Extra.(*types.Func).Argwid = w
 		if w%int64(Widthreg) != 0 {
 			Warn("bad type %v %d\n", t1, w)
 		}

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

@@ -505,16 +505,16 @@ func (p *importer) typ() *types.Type {
 		t = p.newtyp(TARRAY)
 		bound := p.int64()
 		elem := p.typ()
-		t.Extra = &types.ArrayType{Elem: elem, Bound: bound}
+		t.Extra = &types.Array{Elem: elem, Bound: bound}
 
 	case sliceTag:
 		t = p.newtyp(TSLICE)
 		elem := p.typ()
-		t.Extra = types.SliceType{Elem: elem}
+		t.Extra = types.Slice{Elem: elem}
 
 	case dddTag:
 		t = p.newtyp(TDDDFIELD)
-		t.Extra = types.DDDFieldType{T: p.typ()}
+		t.Extra = types.DDDField{T: p.typ()}
 
 	case structTag:
 		t = p.newtyp(TSTRUCT)
@@ -523,7 +523,7 @@ func (p *importer) typ() *types.Type {
 
 	case pointerTag:
 		t = p.newtyp(types.Tptr)
-		t.Extra = types.PtrType{Elem: p.typ()}
+		t.Extra = types.Ptr{Elem: p.typ()}
 
 	case signatureTag:
 		t = p.newtyp(TFUNC)

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

@@ -24,18 +24,18 @@ func TestSizeof(t *testing.T) {
 	}{
 		{Sym{}, 60, 104},
 		{Type{}, 52, 88},
-		{MapType{}, 20, 40},
-		{ForwardType{}, 20, 32},
-		{FuncType{}, 28, 48},
-		{StructType{}, 12, 24},
-		{InterType{}, 4, 8},
-		{ChanType{}, 8, 16},
-		{ArrayType{}, 12, 16},
-		{DDDFieldType{}, 4, 8},
-		{FuncArgsType{}, 4, 8},
-		{ChanArgsType{}, 4, 8},
-		{PtrType{}, 4, 8},
-		{SliceType{}, 4, 8},
+		{Map{}, 20, 40},
+		{Forward{}, 20, 32},
+		{Func{}, 28, 48},
+		{Struct{}, 12, 24},
+		{Interface{}, 4, 8},
+		{Chan{}, 8, 16},
+		{Array{}, 12, 16},
+		{DDDField{}, 4, 8},
+		{FuncArgs{}, 4, 8},
+		{ChanArgs{}, 4, 8},
+		{Ptr{}, 4, 8},
+		{Slice{}, 4, 8},
 	}
 
 	for _, tt := range tests {