1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package gc
import (
"cmd/compile/internal/base"
"cmd/compile/internal/ir"
"cmd/compile/internal/types"
"cmd/internal/bio"
"cmd/internal/src"
"fmt"
"go/constant"
)
func exportf(bout *bio.Writer, format string, args ...interface{}) {
fmt.Fprintf(bout, format, args...)
if base.Debug.Export != 0 {
fmt.Printf(format, args...)
}
}
// exportsym marks n for export (or reexport).
func exportsym(n *ir.Name) {
if n.Sym().OnExportList() {
return
}
n.Sym().SetOnExportList(true)
if base.Flag.E != 0 {
fmt.Printf("export symbol %v\n", n.Sym())
}
Target.Exports = append(Target.Exports, n)
}
func initname(s string) bool {
return s == "init"
}
func autoexport(n *ir.Name, ctxt ir.Class) {
if n.Sym().Pkg != types.LocalPkg {
return
}
if (ctxt != ir.PEXTERN && ctxt != ir.PFUNC) || dclcontext != ir.PEXTERN {
return
}
if n.Type() != nil && n.Type().IsKind(types.TFUNC) && ir.IsMethod(n) {
return
}
if types.IsExported(n.Sym().Name) || initname(n.Sym().Name) {
exportsym(n)
}
if base.Flag.AsmHdr != "" && !n.Sym().Asm() {
n.Sym().SetAsm(true)
Target.Asms = append(Target.Asms, n)
}
}
func dumpexport(bout *bio.Writer) {
p := &exporter{marked: make(map[*types.Type]bool)}
for _, n := range Target.Exports {
p.markObject(n)
}
// The linker also looks for the $$ marker - use char after $$ to distinguish format.
exportf(bout, "\n$$B\n") // indicate binary export format
off := bout.Offset()
iexport(bout.Writer)
size := bout.Offset() - off
exportf(bout, "\n$$\n")
if base.Debug.Export != 0 {
fmt.Printf("BenchmarkExportSize:%s 1 %d bytes\n", base.Ctxt.Pkgpath, size)
}
}
func importsym(ipkg *types.Pkg, pos src.XPos, s *types.Sym, op ir.Op, ctxt ir.Class) *ir.Name {
if n := s.PkgDef(); n != nil {
base.Fatalf("importsym of symbol that already exists: %v", n)
}
n := ir.NewDeclNameAt(pos, op, s)
n.Class_ = ctxt // TODO(mdempsky): Move this into NewDeclNameAt too?
s.SetPkgDef(n)
s.Importdef = ipkg
return n
}
// importtype returns the named type declared by symbol s.
// If no such type has been declared yet, a forward declaration is returned.
// ipkg is the package being imported
func importtype(ipkg *types.Pkg, pos src.XPos, s *types.Sym) *ir.Name {
n := importsym(ipkg, pos, s, ir.OTYPE, ir.PEXTERN)
n.SetType(types.NewNamed(n))
return n
}
// importobj declares symbol s as an imported object representable by op.
// ipkg is the package being imported
func importobj(ipkg *types.Pkg, pos src.XPos, s *types.Sym, op ir.Op, ctxt ir.Class, t *types.Type) *ir.Name {
n := importsym(ipkg, pos, s, op, ctxt)
n.SetType(t)
if ctxt == ir.PFUNC {
n.Sym().SetFunc(true)
}
return n
}
// importconst declares symbol s as an imported constant with type t and value val.
// ipkg is the package being imported
func importconst(ipkg *types.Pkg, pos src.XPos, s *types.Sym, t *types.Type, val constant.Value) *ir.Name {
n := importobj(ipkg, pos, s, ir.OLITERAL, ir.PEXTERN, t)
n.SetVal(val)
return n
}
// importfunc declares symbol s as an imported function with type t.
// ipkg is the package being imported
func importfunc(ipkg *types.Pkg, pos src.XPos, s *types.Sym, t *types.Type) *ir.Name {
n := importobj(ipkg, pos, s, ir.ONAME, ir.PFUNC, t)
fn := ir.NewFunc(pos)
fn.SetType(t)
n.SetFunc(fn)
fn.Nname = n
return n
}
// importvar declares symbol s as an imported variable with type t.
// ipkg is the package being imported
func importvar(ipkg *types.Pkg, pos src.XPos, s *types.Sym, t *types.Type) *ir.Name {
return importobj(ipkg, pos, s, ir.ONAME, ir.PEXTERN, t)
}
// importalias declares symbol s as an imported type alias with type t.
// ipkg is the package being imported
func importalias(ipkg *types.Pkg, pos src.XPos, s *types.Sym, t *types.Type) *ir.Name {
return importobj(ipkg, pos, s, ir.OTYPE, ir.PEXTERN, t)
}
func dumpasmhdr() {
b, err := bio.Create(base.Flag.AsmHdr)
if err != nil {
base.Fatalf("%v", err)
}
fmt.Fprintf(b, "// generated by compile -asmhdr from package %s\n\n", types.LocalPkg.Name)
for _, n := range Target.Asms {
if n.Sym().IsBlank() {
continue
}
switch n.Op() {
case ir.OLITERAL:
t := n.Val().Kind()
if t == constant.Float || t == constant.Complex {
break
}
fmt.Fprintf(b, "#define const_%s %#v\n", n.Sym().Name, n.Val())
case ir.OTYPE:
t := n.Type()
if !t.IsStruct() || t.StructType().Map != nil || t.IsFuncArgStruct() {
break
}
fmt.Fprintf(b, "#define %s__size %d\n", n.Sym().Name, int(t.Width))
for _, f := range t.Fields().Slice() {
if !f.Sym.IsBlank() {
fmt.Fprintf(b, "#define %s_%s %d\n", n.Sym().Name, f.Sym.Name, int(f.Offset))
}
}
}
}
b.Close()
}
|
