cmd/internal: remove SymKind values that are only checked for, never set

Change-Id: Id152767c033c12966e9e12ae303b99f38776f919
Reviewed-on: https://go-review.googlesource.com/40987
Run-TryBot: Michael Hudson-Doyle <michael.hudson@canonical.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

src/cmd/internal/obj/mips/asm0.go

@@ -606,10 +606,6 @@ func (c *ctxt0) aclass(a *obj.Addr) int {
 			if s == nil {
 				break
 			}
-			if s.Type == objabi.SCONST {
-				c.instoffset = a.Offset
-				goto consize
-			}
 
 			c.instoffset = a.Offset
 			if s.Type == objabi.STLSBSS {

src/cmd/internal/obj/plist.go

@@ -162,7 +162,7 @@ func (ctxt *Link) Globl(s *LSym, size int64, flag int) {
 	s.Set(AttrOnList, true)
 	ctxt.Data = append(ctxt.Data, s)
 	s.Size = size
-	if s.Type == 0 || s.Type == objabi.SXREF {
+	if s.Type == 0 {
 		s.Type = objabi.SBSS
 	}
 	if flag&DUPOK != 0 {

src/cmd/internal/obj/ppc64/asm9.go

@@ -810,10 +810,6 @@ func (c *ctxt9) aclass(a *obj.Addr) int {
 			if s == nil {
 				break
 			}
-			if s.Type == objabi.SCONST {
-				c.instoffset = a.Offset
-				goto consize
-			}
 
 			c.instoffset = a.Offset
 

src/cmd/internal/obj/s390x/asmz.go

@@ -558,9 +558,6 @@ func (c *ctxtz) aclass(a *obj.Addr) int {
 				break
 			}
 			c.instoffset = a.Offset
-			if s.Type == objabi.SCONST {
-				goto consize
-			}
 
 			return C_SYMADDR
 

src/cmd/internal/objabi/symkind.go

@@ -54,10 +54,6 @@ const (
 	SNOPTRBSS
 	// Thread-local data that is initally all 0s
 	STLSBSS
-	// TODO(mwhudson): outside of the linker, these values are
-	// only checked for, not set, so they should be removed.
-	SXREF
-	SCONST
 	// Debugging data
 	SDWARFINFO
 )

src/cmd/internal/objabi/symkind_string.go

@@ -4,9 +4,9 @@ package objabi
 
 import "fmt"
 
-const _SymKind_name = "SxxxSTEXTSRODATASNOPTRDATASDATASBSSSNOPTRBSSSTLSBSSSXREFSCONSTSDWARFINFO"
+const _SymKind_name = "SxxxSTEXTSRODATASNOPTRDATASDATASBSSSNOPTRBSSSTLSBSSSDWARFINFO"
 
-var _SymKind_index = [...]uint8{0, 4, 9, 16, 26, 31, 35, 44, 51, 56, 62, 72}
+var _SymKind_index = [...]uint8{0, 4, 9, 16, 26, 31, 35, 44, 51, 61}
 
 func (i SymKind) String() string {
 	if i < 0 || i >= SymKind(len(_SymKind_index)-1) {

src/cmd/internal/objfile/goobj.go

@@ -53,8 +53,6 @@ func (f *goobjFile) symbols() ([]Sym, error) {
 			sym.Code = 'D'
 		case objabi.SBSS, objabi.SNOPTRBSS, objabi.STLSBSS:
 			sym.Code = 'B'
-		case objabi.SXREF, objabi.SCONST:
-			sym.Code = 'X' // should not see
 		}
 		if s.Version != 0 {
 			sym.Code += 'a' - 'A'

src/cmd/link/internal/ld/symkind.go

@@ -121,8 +121,6 @@ var abiSymKindToSymKind = [...]SymKind{
 	SBSS,
 	SNOPTRBSS,
 	STLSBSS,
-	SXREF,
-	SCONST,
 	SDWARFINFO,
 }