cmd/compile/internal, cmd/internal/obj: used keyed ProgInfo literals

Safer, more readable, shorter.

Change-Id: I5cf1f438e20a3df45fc43cc5c870a533f7c524bf
Reviewed-on: https://go-review.googlesource.com/10517Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/cmd/compile/internal/ppc64/prog.go

@@ -25,83 +25,83 @@ const (
 //
 // The table is formatted for 8-space tabs.
 var progtable = [ppc64.ALAST]obj.ProgInfo{
-	obj.ATYPE:     {gc.Pseudo | gc.Skip, 0, 0, 0},
-	obj.ATEXT:     {gc.Pseudo, 0, 0, 0},
-	obj.AFUNCDATA: {gc.Pseudo, 0, 0, 0},
-	obj.APCDATA:   {gc.Pseudo, 0, 0, 0},
-	obj.AUNDEF:    {gc.Break, 0, 0, 0},
-	obj.AUSEFIELD: {gc.OK, 0, 0, 0},
-	obj.ACHECKNIL: {gc.LeftRead, 0, 0, 0},
-	obj.AVARDEF:   {gc.Pseudo | gc.RightWrite, 0, 0, 0},
-	obj.AVARKILL:  {gc.Pseudo | gc.RightWrite, 0, 0, 0},
+	obj.ATYPE:     {Flags: gc.Pseudo | gc.Skip},
+	obj.ATEXT:     {Flags: gc.Pseudo},
+	obj.AFUNCDATA: {Flags: gc.Pseudo},
+	obj.APCDATA:   {Flags: gc.Pseudo},
+	obj.AUNDEF:    {Flags: gc.Break},
+	obj.AUSEFIELD: {Flags: gc.OK},
+	obj.ACHECKNIL: {Flags: gc.LeftRead},
+	obj.AVARDEF:   {Flags: gc.Pseudo | gc.RightWrite},
+	obj.AVARKILL:  {Flags: gc.Pseudo | gc.RightWrite},
 
 	// NOP is an internal no-op that also stands
 	// for USED and SET annotations, not the Power opcode.
-	obj.ANOP: {gc.LeftRead | gc.RightWrite, 0, 0, 0},
+	obj.ANOP: {Flags: gc.LeftRead | gc.RightWrite},
 
 	// Integer
-	ppc64.AADD:    {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.ASUB:    {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.ANEG:    {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AAND:    {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AOR:     {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AXOR:    {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AMULLD:  {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AMULLW:  {gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AMULHD:  {gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AMULHDU: {gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.ADIVD:   {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.ADIVDU:  {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.ASLD:    {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.ASRD:    {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.ASRAD:   {gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.ACMP:    {gc.SizeQ | gc.LeftRead | gc.RightRead, 0, 0, 0},
-	ppc64.ACMPU:   {gc.SizeQ | gc.LeftRead | gc.RightRead, 0, 0, 0},
-	ppc64.ATD:     {gc.SizeQ | gc.RightRead, 0, 0, 0},
+	ppc64.AADD:    {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.ASUB:    {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.ANEG:    {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AAND:    {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AOR:     {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AXOR:    {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AMULLD:  {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AMULLW:  {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AMULHD:  {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AMULHDU: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.ADIVD:   {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.ADIVDU:  {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.ASLD:    {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.ASRD:    {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.ASRAD:   {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.ACMP:    {Flags: gc.SizeQ | gc.LeftRead | gc.RightRead},
+	ppc64.ACMPU:   {Flags: gc.SizeQ | gc.LeftRead | gc.RightRead},
+	ppc64.ATD:     {Flags: gc.SizeQ | gc.RightRead},
 
 	// Floating point.
-	ppc64.AFADD:   {gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AFADDS:  {gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AFSUB:   {gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AFSUBS:  {gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AFMUL:   {gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AFMULS:  {gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AFDIV:   {gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AFDIVS:  {gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AFCTIDZ: {gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AFCFID:  {gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite, 0, 0, 0},
-	ppc64.AFCMPU:  {gc.SizeD | gc.LeftRead | gc.RightRead, 0, 0, 0},
-	ppc64.AFRSP:   {gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv, 0, 0, 0},
+	ppc64.AFADD:   {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AFADDS:  {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AFSUB:   {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AFSUBS:  {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AFMUL:   {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AFMULS:  {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AFDIV:   {Flags: gc.SizeD | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AFDIVS:  {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AFCTIDZ: {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AFCFID:  {Flags: gc.SizeF | gc.LeftRead | gc.RegRead | gc.RightWrite},
+	ppc64.AFCMPU:  {Flags: gc.SizeD | gc.LeftRead | gc.RightRead},
+	ppc64.AFRSP:   {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Conv},
 
 	// Moves
-	ppc64.AMOVB:  {gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv, 0, 0, 0},
-	ppc64.AMOVBU: {gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv | gc.PostInc, 0, 0, 0},
-	ppc64.AMOVBZ: {gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv, 0, 0, 0},
-	ppc64.AMOVH:  {gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv, 0, 0, 0},
-	ppc64.AMOVHU: {gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv | gc.PostInc, 0, 0, 0},
-	ppc64.AMOVHZ: {gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv, 0, 0, 0},
-	ppc64.AMOVW:  {gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv, 0, 0, 0},
+	ppc64.AMOVB:  {Flags: gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv},
+	ppc64.AMOVBU: {Flags: gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv | gc.PostInc},
+	ppc64.AMOVBZ: {Flags: gc.SizeB | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv},
+	ppc64.AMOVH:  {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv},
+	ppc64.AMOVHU: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv | gc.PostInc},
+	ppc64.AMOVHZ: {Flags: gc.SizeW | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv},
+	ppc64.AMOVW:  {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv},
 
 	// there is no AMOVWU.
-	ppc64.AMOVWZU: {gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv | gc.PostInc, 0, 0, 0},
-	ppc64.AMOVWZ:  {gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv, 0, 0, 0},
-	ppc64.AMOVD:   {gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Move, 0, 0, 0},
-	ppc64.AMOVDU:  {gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Move | gc.PostInc, 0, 0, 0},
-	ppc64.AFMOVS:  {gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv, 0, 0, 0},
-	ppc64.AFMOVD:  {gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Move, 0, 0, 0},
+	ppc64.AMOVWZU: {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv | gc.PostInc},
+	ppc64.AMOVWZ:  {Flags: gc.SizeL | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv},
+	ppc64.AMOVD:   {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Move},
+	ppc64.AMOVDU:  {Flags: gc.SizeQ | gc.LeftRead | gc.RightWrite | gc.Move | gc.PostInc},
+	ppc64.AFMOVS:  {Flags: gc.SizeF | gc.LeftRead | gc.RightWrite | gc.Move | gc.Conv},
+	ppc64.AFMOVD:  {Flags: gc.SizeD | gc.LeftRead | gc.RightWrite | gc.Move},
 
 	// Jumps
-	ppc64.ABR:     {gc.Jump | gc.Break, 0, 0, 0},
-	ppc64.ABL:     {gc.Call, 0, 0, 0},
-	ppc64.ABEQ:    {gc.Cjmp, 0, 0, 0},
-	ppc64.ABNE:    {gc.Cjmp, 0, 0, 0},
-	ppc64.ABGE:    {gc.Cjmp, 0, 0, 0},
-	ppc64.ABLT:    {gc.Cjmp, 0, 0, 0},
-	ppc64.ABGT:    {gc.Cjmp, 0, 0, 0},
-	ppc64.ABLE:    {gc.Cjmp, 0, 0, 0},
-	obj.ARET:      {gc.Break, 0, 0, 0},
-	obj.ADUFFZERO: {gc.Call, 0, 0, 0},
-	obj.ADUFFCOPY: {gc.Call, 0, 0, 0},
+	ppc64.ABR:     {Flags: gc.Jump | gc.Break},
+	ppc64.ABL:     {Flags: gc.Call},
+	ppc64.ABEQ:    {Flags: gc.Cjmp},
+	ppc64.ABNE:    {Flags: gc.Cjmp},
+	ppc64.ABGE:    {Flags: gc.Cjmp},
+	ppc64.ABLT:    {Flags: gc.Cjmp},
+	ppc64.ABGT:    {Flags: gc.Cjmp},
+	ppc64.ABLE:    {Flags: gc.Cjmp},
+	obj.ARET:      {Flags: gc.Break},
+	obj.ADUFFZERO: {Flags: gc.Call},
+	obj.ADUFFCOPY: {Flags: gc.Call},
 }
 
 var initproginfo_initialized int

src/cmd/internal/obj/link.go

@@ -251,6 +251,7 @@ type ProgInfo struct {
 	Reguse   uint64   // registers implicitly used by this instruction
 	Regset   uint64   // registers implicitly set by this instruction
 	Regindex uint64   // registers used by addressing mode
+	_        struct{} // to prevent unkeyed literals
 }
 
 // Prog.as opcodes.