cmd/internal/obj: unify creation of numeric literal syms

This is a straightforward refactoring,
to reduce the scope of upcoming changes.

The symbol size and AttrLocal=true was not
set universally, but it appears not to matter,
since toolstash -cmp is happy.

Passes toolstash-check -all.

Change-Id: I7f8392f939592d3a1bc6f61dec992f5661f42fca
Reviewed-on: https://go-review.googlesource.com/39791
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/cmd/compile/fmt_test.go

@@ -703,10 +703,8 @@ var knownFormats = map[string]string{
 	"uint16 %d":        "",
 	"uint16 %v":        "",
 	"uint16 %x":        "",
-	"uint32 %08x":      "",
 	"uint32 %d":        "",
 	"uint32 %x":        "",
-	"uint64 %016x":     "",
 	"uint64 %08x":      "",
 	"uint64 %d":        "",
 	"uint64 %x":        "",

src/cmd/compile/internal/x86/ssa.go

@@ -443,17 +443,15 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) {
 		p.To.Type = obj.TYPE_REG
 		p.To.Reg = x
 	case ssa.Op386MOVSSconst1, ssa.Op386MOVSDconst1:
-		var literal string
-		if v.Op == ssa.Op386MOVSDconst1 {
-			literal = fmt.Sprintf("$f64.%016x", uint64(v.AuxInt))
-		} else {
-			literal = fmt.Sprintf("$f32.%08x", math.Float32bits(float32(math.Float64frombits(uint64(v.AuxInt)))))
-		}
 		p := s.Prog(x86.ALEAL)
 		p.From.Type = obj.TYPE_MEM
 		p.From.Name = obj.NAME_EXTERN
-		p.From.Sym = gc.Ctxt.Lookup(literal, 0)
-		p.From.Sym.Set(obj.AttrLocal, true)
+		f := math.Float64frombits(uint64(v.AuxInt))
+		if v.Op == ssa.Op386MOVSDconst1 {
+			p.From.Sym = gc.Ctxt.Float64Sym(f)
+		} else {
+			p.From.Sym = gc.Ctxt.Float32Sym(float32(f))
+		}
 		p.To.Type = obj.TYPE_REG
 		p.To.Reg = v.Reg()
 	case ssa.Op386MOVSSconst2, ssa.Op386MOVSDconst2:

src/cmd/internal/obj/arm/obj5.go

@@ -33,8 +33,6 @@ package arm
 import (
 	"cmd/internal/obj"
 	"cmd/internal/sys"
-	"fmt"
-	"math"
 )
 
 var progedit_tlsfallback *obj.LSym
@@ -108,22 +106,16 @@ func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
 	case AMOVF:
 		if p.From.Type == obj.TYPE_FCONST && chipfloat5(ctxt, p.From.Val.(float64)) < 0 && (chipzero5(ctxt, p.From.Val.(float64)) < 0 || p.Scond&C_SCOND != C_SCOND_NONE) {
 			f32 := float32(p.From.Val.(float64))
-			i32 := math.Float32bits(f32)
-			literal := fmt.Sprintf("$f32.%08x", i32)
-			s := ctxt.Lookup(literal, 0)
 			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
+			p.From.Sym = ctxt.Float32Sym(f32)
 			p.From.Name = obj.NAME_EXTERN
 			p.From.Offset = 0
 		}
 
 	case AMOVD:
 		if p.From.Type == obj.TYPE_FCONST && chipfloat5(ctxt, p.From.Val.(float64)) < 0 && (chipzero5(ctxt, p.From.Val.(float64)) < 0 || p.Scond&C_SCOND != C_SCOND_NONE) {
-			i64 := math.Float64bits(p.From.Val.(float64))
-			literal := fmt.Sprintf("$f64.%016x", i64)
-			s := ctxt.Lookup(literal, 0)
 			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
+			p.From.Sym = ctxt.Float64Sym(p.From.Val.(float64))
 			p.From.Name = obj.NAME_EXTERN
 			p.From.Offset = 0
 		}

src/cmd/internal/obj/arm64/obj7.go

@@ -33,7 +33,6 @@ package arm64
 import (
 	"cmd/internal/obj"
 	"cmd/internal/sys"
-	"fmt"
 	"math"
 )
 
@@ -259,36 +258,27 @@ func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
 	case AFMOVS:
 		if p.From.Type == obj.TYPE_FCONST {
 			f32 := float32(p.From.Val.(float64))
-			i32 := math.Float32bits(f32)
-			if i32 == 0 {
+			if math.Float32bits(f32) == 0 {
 				p.From.Type = obj.TYPE_REG
 				p.From.Reg = REGZERO
 				break
 			}
-			literal := fmt.Sprintf("$f32.%08x", i32)
-			s := ctxt.Lookup(literal, 0)
-			s.Size = 4
 			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
-			p.From.Sym.Set(obj.AttrLocal, true)
+			p.From.Sym = ctxt.Float32Sym(f32)
 			p.From.Name = obj.NAME_EXTERN
 			p.From.Offset = 0
 		}
 
 	case AFMOVD:
 		if p.From.Type == obj.TYPE_FCONST {
-			i64 := math.Float64bits(p.From.Val.(float64))
-			if i64 == 0 {
+			f64 := p.From.Val.(float64)
+			if math.Float64bits(f64) == 0 {
 				p.From.Type = obj.TYPE_REG
 				p.From.Reg = REGZERO
 				break
 			}
-			literal := fmt.Sprintf("$f64.%016x", i64)
-			s := ctxt.Lookup(literal, 0)
-			s.Size = 8
 			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
-			p.From.Sym.Set(obj.AttrLocal, true)
+			p.From.Sym = ctxt.Float64Sym(f64)
 			p.From.Name = obj.NAME_EXTERN
 			p.From.Offset = 0
 		}

src/cmd/internal/obj/mips/obj0.go

@@ -58,36 +58,29 @@ func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
 	case AMOVF:
 		if p.From.Type == obj.TYPE_FCONST {
 			f32 := float32(p.From.Val.(float64))
-			i32 := math.Float32bits(f32)
-			if i32 == 0 {
+			if math.Float32bits(f32) == 0 {
 				p.As = AMOVW
 				p.From.Type = obj.TYPE_REG
 				p.From.Reg = REGZERO
 				break
 			}
-			literal := fmt.Sprintf("$f32.%08x", i32)
-			s := ctxt.Lookup(literal, 0)
-			s.Size = 4
 			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
+			p.From.Sym = ctxt.Float32Sym(f32)
 			p.From.Name = obj.NAME_EXTERN
 			p.From.Offset = 0
 		}
 
 	case AMOVD:
 		if p.From.Type == obj.TYPE_FCONST {
-			i64 := math.Float64bits(p.From.Val.(float64))
-			if i64 == 0 && ctxt.Arch.Family == sys.MIPS64 {
+			f64 := p.From.Val.(float64)
+			if math.Float64bits(f64) == 0 && ctxt.Arch.Family == sys.MIPS64 {
 				p.As = AMOVV
 				p.From.Type = obj.TYPE_REG
 				p.From.Reg = REGZERO
 				break
 			}
-			literal := fmt.Sprintf("$f64.%016x", i64)
-			s := ctxt.Lookup(literal, 0)
-			s.Size = 8
 			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
+			p.From.Sym = ctxt.Float64Sym(f64)
 			p.From.Name = obj.NAME_EXTERN
 			p.From.Offset = 0
 		}
@@ -95,11 +88,8 @@ func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
 		// Put >32-bit constants in memory and load them
 	case AMOVV:
 		if p.From.Type == obj.TYPE_CONST && p.From.Name == obj.NAME_NONE && p.From.Reg == 0 && int64(int32(p.From.Offset)) != p.From.Offset {
-			literal := fmt.Sprintf("$i64.%016x", uint64(p.From.Offset))
-			s := ctxt.Lookup(literal, 0)
-			s.Size = 8
 			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
+			p.From.Sym = ctxt.Int64Sym(p.From.Offset)
 			p.From.Name = obj.NAME_EXTERN
 			p.From.Offset = 0
 		}

src/cmd/internal/obj/ppc64/obj9.go

@@ -32,8 +32,6 @@ package ppc64
 import (
 	"cmd/internal/obj"
 	"cmd/internal/sys"
-	"fmt"
-	"math"
 )
 
 func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
@@ -57,26 +55,17 @@ func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
 	case AFMOVS:
 		if p.From.Type == obj.TYPE_FCONST {
 			f32 := float32(p.From.Val.(float64))
-			i32 := math.Float32bits(f32)
-			literal := fmt.Sprintf("$f32.%08x", i32)
-			s := ctxt.Lookup(literal, 0)
-			s.Size = 4
 			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
-			p.From.Sym.Set(obj.AttrLocal, true)
+			p.From.Sym = ctxt.Float32Sym(f32)
 			p.From.Name = obj.NAME_EXTERN
 			p.From.Offset = 0
 		}
 
 	case AFMOVD:
 		if p.From.Type == obj.TYPE_FCONST {
-			i64 := math.Float64bits(p.From.Val.(float64))
-			literal := fmt.Sprintf("$f64.%016x", i64)
-			s := ctxt.Lookup(literal, 0)
-			s.Size = 8
+			f64 := p.From.Val.(float64)
 			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
-			p.From.Sym.Set(obj.AttrLocal, true)
+			p.From.Sym = ctxt.Float64Sym(f64)
 			p.From.Name = obj.NAME_EXTERN
 			p.From.Offset = 0
 		}
@@ -84,12 +73,8 @@ func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
 		// Put >32-bit constants in memory and load them
 	case AMOVD:
 		if p.From.Type == obj.TYPE_CONST && p.From.Name == obj.NAME_NONE && p.From.Reg == 0 && int64(int32(p.From.Offset)) != p.From.Offset {
-			literal := fmt.Sprintf("$i64.%016x", uint64(p.From.Offset))
-			s := ctxt.Lookup(literal, 0)
-			s.Size = 8
 			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
-			p.From.Sym.Set(obj.AttrLocal, true)
+			p.From.Sym = ctxt.Int64Sym(p.From.Offset)
 			p.From.Name = obj.NAME_EXTERN
 			p.From.Offset = 0
 		}

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

@@ -32,7 +32,6 @@ package s390x
 import (
 	"cmd/internal/obj"
 	"cmd/internal/sys"
-	"fmt"
 	"math"
 )
 
@@ -57,32 +56,23 @@ func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
 	case AFMOVS:
 		if p.From.Type == obj.TYPE_FCONST {
 			f32 := float32(p.From.Val.(float64))
-			i32 := math.Float32bits(f32)
-			if i32 == 0 { // +0
+			if math.Float32bits(f32) == 0 { // +0
 				break
 			}
-			literal := fmt.Sprintf("$f32.%08x", i32)
-			s := ctxt.Lookup(literal, 0)
-			s.Size = 4
 			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
-			p.From.Sym.Set(obj.AttrLocal, true)
+			p.From.Sym = ctxt.Float32Sym(f32)
 			p.From.Name = obj.NAME_EXTERN
 			p.From.Offset = 0
 		}
 
 	case AFMOVD:
 		if p.From.Type == obj.TYPE_FCONST {
-			i64 := math.Float64bits(p.From.Val.(float64))
-			if i64 == 0 { // +0
+			f64 := p.From.Val.(float64)
+			if math.Float64bits(f64) == 0 { // +0
 				break
 			}
-			literal := fmt.Sprintf("$f64.%016x", i64)
-			s := ctxt.Lookup(literal, 0)
-			s.Size = 8
 			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
-			p.From.Sym.Set(obj.AttrLocal, true)
+			p.From.Sym = ctxt.Float64Sym(f64)
 			p.From.Name = obj.NAME_EXTERN
 			p.From.Offset = 0
 		}
@@ -94,12 +84,8 @@ func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
 			if int64(int32(val)) != val &&
 				int64(uint32(val)) != val &&
 				int64(uint64(val)&(0xffffffff<<32)) != val {
-				literal := fmt.Sprintf("$i64.%016x", uint64(p.From.Offset))
-				s := ctxt.Lookup(literal, 0)
-				s.Size = 8
 				p.From.Type = obj.TYPE_MEM
-				p.From.Sym = s
-				p.From.Sym.Set(obj.AttrLocal, true)
+				p.From.Sym = ctxt.Int64Sym(p.From.Offset)
 				p.From.Name = obj.NAME_EXTERN
 				p.From.Offset = 0
 			}

src/cmd/internal/obj/sym.go

@@ -32,7 +32,9 @@
 package obj
 
 import (
+	"fmt"
 	"log"
+	"math"
 	"os"
 	"path/filepath"
 )
@@ -82,6 +84,32 @@ func (ctxt *Link) Lookup(name string, v int) *LSym {
 	return s
 }
 
+func (ctxt *Link) Float32Sym(f float32) *LSym {
+	i := math.Float32bits(f)
+	name := fmt.Sprintf("$f32.%08x", i)
+	s := ctxt.Lookup(name, 0)
+	s.Size = 4
+	s.Set(AttrLocal, true)
+	return s
+}
+
+func (ctxt *Link) Float64Sym(f float64) *LSym {
+	i := math.Float64bits(f)
+	name := fmt.Sprintf("$f64.%016x", i)
+	s := ctxt.Lookup(name, 0)
+	s.Size = 8
+	s.Set(AttrLocal, true)
+	return s
+}
+
+func (ctxt *Link) Int64Sym(i int64) *LSym {
+	name := fmt.Sprintf("$i64.%016x", uint64(i))
+	s := ctxt.Lookup(name, 0)
+	s.Size = 8
+	s.Set(AttrLocal, true)
+	return s
+}
+
 func Linksymfmt(s *LSym) string {
 	if s == nil {
 		return "<nil>"

src/cmd/internal/obj/x86/obj6.go

@@ -33,7 +33,6 @@ package x86
 import (
 	"cmd/internal/obj"
 	"cmd/internal/sys"
-	"fmt"
 	"math"
 	"strings"
 )
@@ -241,13 +240,9 @@ func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
 		AUCOMISS:
 		if p.From.Type == obj.TYPE_FCONST {
 			f32 := float32(p.From.Val.(float64))
-			i32 := math.Float32bits(f32)
-			literal := fmt.Sprintf("$f32.%08x", i32)
-			s := ctxt.Lookup(literal, 0)
 			p.From.Type = obj.TYPE_MEM
 			p.From.Name = obj.NAME_EXTERN
-			p.From.Sym = s
-			p.From.Sym.Set(obj.AttrLocal, true)
+			p.From.Sym = ctxt.Float32Sym(f32)
 			p.From.Offset = 0
 		}
 
@@ -281,13 +276,10 @@ func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
 		ACOMISD,
 		AUCOMISD:
 		if p.From.Type == obj.TYPE_FCONST {
-			i64 := math.Float64bits(p.From.Val.(float64))
-			literal := fmt.Sprintf("$f64.%016x", i64)
-			s := ctxt.Lookup(literal, 0)
+			f64 := p.From.Val.(float64)
 			p.From.Type = obj.TYPE_MEM
 			p.From.Name = obj.NAME_EXTERN
-			p.From.Sym = s
-			p.From.Sym.Set(obj.AttrLocal, true)
+			p.From.Sym = ctxt.Float64Sym(f64)
 			p.From.Offset = 0
 		}
 	}