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cmd/compile: make Maxarg local

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Passes toolstash -cmp. No compiler performance impact.

Updates #15756

Change-Id: I1294058716d83dd1be495d399ed7ab2277754dc6
Reviewed-on: https://go-review.googlesource.com/38329
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Josh Bleecher Snyder 2017-03-17 08:58:36 -07:00
parent 174b858f78
commit e0a5e69be2
4 changed files with 5 additions and 8 deletions
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1
src/cmd/compile/internal/gc/dcl.go
View file

@ -1200,7 +1200,6 @@ func addmethod(msym *Sym, t *Type, local, nointerface bool) {
func funccompile(n *Node) {
Stksize = BADWIDTH
Maxarg = 0
if n.Type == nil {
if nerrors == 0 {

2
src/cmd/compile/internal/gc/go.go
View file

@ -245,8 +245,6 @@ var dclcontext Class // PEXTERN/PAUTO
var statuniqgen int // name generator for static temps
var Maxarg int64
var Stksize int64 // stack size for current frame
var stkptrsize int64 // prefix of stack containing pointers

2
src/cmd/compile/internal/gc/init.go
View file

@ -90,8 +90,6 @@ func fninit(n []*Node) {
addvar(gatevar, Types[TUINT8], PEXTERN)
// (2)
Maxarg = 0
fn := nod(ODCLFUNC, nil, nil)
initsym := lookup("init")
fn.Func.Nname = newname(initsym)

8
src/cmd/compile/internal/gc/ssa.go
View file

@ -4204,6 +4204,8 @@ type SSAGenState struct {
SSEto387 map[int16]int16
// Some architectures require a 64-bit temporary for FP-related register shuffling. Examples include x86-387, PPC, and Sparc V8.
ScratchFpMem *Node
maxarg int64 // largest frame size for arguments to calls made by the function
}
// Pc returns the current Prog.
@ -4355,7 +4357,7 @@ func genssa(f *ssa.Func, ptxt *obj.Prog, gcargs, gclocals *Sym) {
liveness(e.curfn, ptxt, gcargs, gclocals)
// Add frame prologue. Zero ambiguously live variables.
thearch.Defframe(ptxt, e.curfn, Stksize+Maxarg)
thearch.Defframe(ptxt, e.curfn, Stksize+s.maxarg)
if Debug['f'] != 0 {
frame(0)
}
@ -4631,8 +4633,8 @@ func (s *SSAGenState) Call(v *ssa.Value) *obj.Prog {
}
p.To.Reg = v.Args[0].Reg()
}
if Maxarg < v.AuxInt {
Maxarg = v.AuxInt
if s.maxarg < v.AuxInt {
s.maxarg = v.AuxInt
}
return p
}