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cmd/internal/obj: Delete Link.Symmorestack

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This started out as trying to remove Bool2int calls, which it does a bit, but
mostly it ended up being removing the Link.Symmorestack array which seemed a
pointless bit of caching.

Change-Id: I91a51eb08cb4b08f3f9f093b575306499267b67a
Reviewed-on: https://go-review.googlesource.com/9239
Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Michael Hudson-Doyle 2015-04-23 14:38:05 +12:00 committed by Minux Ma
parent da11a9dda3
commit 4b23b50fb4
5 changed files with 20 additions and 32 deletions
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13
src/cmd/internal/obj/arm/obj5.go
View File

@ -180,11 +180,6 @@ func linkcase(casep *obj.Prog) {
func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
autosize := int32(0)
if ctxt.Symmorestack[0] == nil {
ctxt.Symmorestack[0] = obj.Linklookup(ctxt, "runtime.morestack", 0)
ctxt.Symmorestack[1] = obj.Linklookup(ctxt, "runtime.morestack_noctxt", 0)
}
ctxt.Cursym = cursym
if cursym.Text == nil || cursym.Text.Link == nil {
@ -367,7 +362,7 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
}
if p.From3.Offset&obj.NOSPLIT == 0 {
p = stacksplit(ctxt, p, autosize, cursym.Text.From3.Offset&obj.NEEDCTXT == 0) // emit split check
p = stacksplit(ctxt, p, autosize) // emit split check
}
// MOVW.W R14,$-autosize(SP)
@ -718,7 +713,7 @@ func softfloat(ctxt *obj.Link, cursym *obj.LSym) {
}
}
func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32, noctxt bool) *obj.Prog {
func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32) *obj.Prog {
// MOVW g_stackguard(g), R1
p = obj.Appendp(ctxt, p)
@ -828,8 +823,10 @@ func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32, noctxt bool) *obj.
p.To.Type = obj.TYPE_BRANCH
if ctxt.Cursym.Cfunc != 0 {
p.To.Sym = obj.Linklookup(ctxt, "runtime.morestackc", 0)
} else if ctxt.Cursym.Text.From3.Offset&obj.NEEDCTXT == 0 {
p.To.Sym = obj.Linklookup(ctxt, "runtime.morestack_noctxt", 0)
} else {
p.To.Sym = ctxt.Symmorestack[obj.Bool2int(noctxt)]
p.To.Sym = obj.Linklookup(ctxt, "runtime.morestack", 0)
}
// BLS start

13
src/cmd/internal/obj/arm64/obj7.go
View File

@ -49,7 +49,7 @@ var complements = []int16{
ACMNW: ACMPW,
}
func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32, noctxt int) *obj.Prog {
func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32) *obj.Prog {
// MOV g_stackguard(g), R1
p = obj.Appendp(ctxt, p)
@ -186,8 +186,10 @@ func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32, noctxt int) *obj.P
p.To.Type = obj.TYPE_BRANCH
if ctxt.Cursym.Cfunc != 0 {
p.To.Sym = obj.Linklookup(ctxt, "runtime.morestackc", 0)
} else if ctxt.Cursym.Text.From3.Offset&obj.NEEDCTXT == 0 {
p.To.Sym = obj.Linklookup(ctxt, "runtime.morestack_noctxt", 0)
} else {
p.To.Sym = ctxt.Symmorestack[noctxt]
p.To.Sym = obj.Linklookup(ctxt, "runtime.morestack", 0)
}
// B start
@ -465,11 +467,6 @@ loop:
}
func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
if ctxt.Symmorestack[0] == nil {
ctxt.Symmorestack[0] = obj.Linklookup(ctxt, "runtime.morestack", 0)
ctxt.Symmorestack[1] = obj.Linklookup(ctxt, "runtime.morestack_noctxt", 0)
}
ctxt.Cursym = cursym
if cursym.Text == nil || cursym.Text.Link == nil {
@ -583,7 +580,7 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
}
if !(p.From3.Offset&obj.NOSPLIT != 0) {
p = stacksplit(ctxt, p, ctxt.Autosize, obj.Bool2int(cursym.Text.From3.Offset&obj.NEEDCTXT == 0)) // emit split check
p = stacksplit(ctxt, p, ctxt.Autosize) // emit split check
}
aoffset = ctxt.Autosize

1
src/cmd/internal/obj/link.go
View File

@ -472,7 +472,6 @@ type Link struct {
Sym_divu *LSym
Sym_mod *LSym
Sym_modu *LSym
Symmorestack [2]*LSym
Tlsg *LSym
Plan9privates *LSym
Curp *Prog

13
src/cmd/internal/obj/ppc64/obj9.go
View File

@ -115,11 +115,6 @@ func progedit(ctxt *obj.Link, p *obj.Prog) {
}
func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
if ctxt.Symmorestack[0] == nil {
ctxt.Symmorestack[0] = obj.Linklookup(ctxt, "runtime.morestack", 0)
ctxt.Symmorestack[1] = obj.Linklookup(ctxt, "runtime.morestack_noctxt", 0)
}
// TODO(minux): add morestack short-cuts with small fixed frame-size.
ctxt.Cursym = cursym
@ -328,7 +323,7 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
p.To.Offset = int64(autosize) - 8
if p.From3.Offset&obj.NOSPLIT == 0 {
p = stacksplit(ctxt, p, autosize, cursym.Text.From3.Offset&obj.NEEDCTXT == 0) // emit split check
p = stacksplit(ctxt, p, autosize) // emit split check
}
q = p
@ -628,7 +623,7 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
q = p;
}
*/
func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32, noctxt bool) *obj.Prog {
func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32) *obj.Prog {
// MOVD g_stackguard(g), R3
p = obj.Appendp(ctxt, p)
@ -757,8 +752,10 @@ func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32, noctxt bool) *obj.
p.To.Type = obj.TYPE_BRANCH
if ctxt.Cursym.Cfunc != 0 {
p.To.Sym = obj.Linklookup(ctxt, "runtime.morestackc", 0)
} else if ctxt.Cursym.Text.From3.Offset&obj.NEEDCTXT == 0 {
p.To.Sym = obj.Linklookup(ctxt, "runtime.morestack_noctxt", 0)
} else {
p.To.Sym = ctxt.Symmorestack[obj.Bool2int(noctxt)]
p.To.Sym = obj.Linklookup(ctxt, "runtime.morestack", 0)
}
// BR start

12
src/cmd/internal/obj/x86/obj6.go
View File

@ -449,10 +449,6 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
if ctxt.Tlsg == nil {
ctxt.Tlsg = obj.Linklookup(ctxt, "runtime.tlsg", 0)
}
if ctxt.Symmorestack[0] == nil {
ctxt.Symmorestack[0] = obj.Linklookup(ctxt, "runtime.morestack", 0)
ctxt.Symmorestack[1] = obj.Linklookup(ctxt, "runtime.morestack_noctxt", 0)
}
if ctxt.Headtype == obj.Hplan9 && ctxt.Plan9privates == nil {
ctxt.Plan9privates = obj.Linklookup(ctxt, "_privates", 0)
@ -514,7 +510,7 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
var q *obj.Prog
if cursym.Text.From3.Offset&obj.NOSPLIT == 0 {
p = stacksplit(ctxt, p, autoffset, int32(textarg), cursym.Text.From3.Offset&obj.NEEDCTXT == 0, &q) // emit split check
p = stacksplit(ctxt, p, autoffset, int32(textarg), &q) // emit split check
}
if autoffset != 0 {
@ -871,7 +867,7 @@ func load_g_cx(ctxt *obj.Link, p *obj.Prog) *obj.Prog {
// Returns last new instruction.
// On return, *jmpok is the instruction that should jump
// to the stack frame allocation if no split is needed.
func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32, textarg int32, noctxt bool, jmpok **obj.Prog) *obj.Prog {
func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32, textarg int32, jmpok **obj.Prog) *obj.Prog {
cmp := ACMPQ
lea := ALEAQ
mov := AMOVQ
@ -997,8 +993,10 @@ func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32, textarg int32, noc
p.To.Type = obj.TYPE_BRANCH
if ctxt.Cursym.Cfunc != 0 {
p.To.Sym = obj.Linklookup(ctxt, "runtime.morestackc", 0)
} else if ctxt.Cursym.Text.From3.Offset&obj.NEEDCTXT == 0 {
p.To.Sym = obj.Linklookup(ctxt, "runtime.morestack_noctxt", 0)
} else {
p.To.Sym = ctxt.Symmorestack[obj.Bool2int(noctxt)]
p.To.Sym = obj.Linklookup(ctxt, "runtime.morestack", 0)
}
p = obj.Appendp(ctxt, p)