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cmd/compile: cleanup genwrapper slightly

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ORETJMP doesn't need an ONAME if we just set the target method on Sym
instead of Left. Conveniently, this is where fmt.go was looking for it
anyway.

Change the iface parameter and global compiling_wrappers to bool.

Passes toolstash-check.

Change-Id: I5333f8bcb4e06bf8161808041125eb95c439aafe
Reviewed-on: https://go-review.googlesource.com/68252
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Robert Griesemer <gri@golang.org>
This commit is contained in:
Matthew Dempsky 2017-10-04 11:42:37 -07:00
parent a92a77c56f
commit 31a3b719a0
5 changed files with 14 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

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

@ -198,7 +198,7 @@ var compiling_runtime bool
// Compiling the standard library
var compiling_std bool
var compiling_wrappers int
var compiling_wrappers bool
var use_writebarrier bool

14
src/cmd/compile/internal/gc/reflect.go
View file

@ -438,18 +438,18 @@ func methods(t *types.Type) []*Sig {
if !sig.isym.Siggen() {
sig.isym.SetSiggen(true)
if !eqtype(this, it) || this.Width < int64(Widthptr) {
compiling_wrappers = 1
genwrapper(it, f, sig.isym, 1)
compiling_wrappers = 0
compiling_wrappers = true
genwrapper(it, f, sig.isym, true)
compiling_wrappers = false
}
}
if !sig.tsym.Siggen() {
sig.tsym.SetSiggen(true)
if !eqtype(this, t) {
compiling_wrappers = 1
genwrapper(t, f, sig.tsym, 0)
compiling_wrappers = 0
compiling_wrappers = true
genwrapper(t, f, sig.tsym, false)
compiling_wrappers = false
}
}
}
@ -500,7 +500,7 @@ func imethods(t *types.Type) []*Sig {
isym := methodsym(method, t, false)
if !isym.Siggen() {
isym.SetSiggen(true)
genwrapper(t, f, isym, 0)
genwrapper(t, f, isym, false)
}
}

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

@ -780,7 +780,7 @@ func (s *state) stmt(n *Node) {
s.stmtList(n.List)
b := s.exit()
b.Kind = ssa.BlockRetJmp // override BlockRet
b.Aux = n.Left.Sym.Linksym()
b.Aux = n.Sym.Linksym()
case OCONTINUE, OBREAK:
var to *ssa.Block

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

@ -1671,7 +1671,7 @@ func structargs(tl *types.Type, mustname bool) []*Node {
// rcvr - U
// method - M func (t T)(), a TFIELD type struct
// newnam - the eventual mangled name of this function
func genwrapper(rcvr *types.Type, method *types.Field, newnam *types.Sym, iface int) {
func genwrapper(rcvr *types.Type, method *types.Field, newnam *types.Sym, iface bool) {
if false && Debug['r'] != 0 {
fmt.Printf("genwrapper rcvrtype=%v method=%v newnam=%v\n", rcvr, method, newnam)
}
@ -1688,7 +1688,7 @@ func genwrapper(rcvr *types.Type, method *types.Field, newnam *types.Sym, iface
t := nod(OTFUNC, nil, nil)
l := []*Node{this}
if iface != 0 && rcvr.Width < int64(Widthptr) {
if iface && rcvr.Width < int64(Widthptr) {
// Building method for interface table and receiver
// is smaller than the single pointer-sized word
// that the interface call will pass in.
@ -1746,9 +1746,7 @@ func genwrapper(rcvr *types.Type, method *types.Field, newnam *types.Sym, iface
as := nod(OAS, this.Left, nod(OCONVNOP, dot, nil))
as.Right.Type = rcvr
fn.Nbody.Append(as)
n := nod(ORETJMP, nil, nil)
n.Left = newname(methodsym(method.Sym, methodrcvr, false))
fn.Nbody.Append(n)
fn.Nbody.Append(nodSym(ORETJMP, nil, methodsym(method.Sym, methodrcvr, false)))
// When tail-calling, we can't use a frame pointer.
fn.Func.SetNoFramePointer(true)
} else {

4
src/cmd/compile/internal/gc/typecheck.go
View file

@ -266,7 +266,7 @@ func indexlit(n *Node) *Node {
// n.Left = typecheck1(n.Left, top)
func typecheck1(n *Node, top int) *Node {
switch n.Op {
case OXDOT, ODOT, ODOTPTR, ODOTMETH, ODOTINTER:
case OXDOT, ODOT, ODOTPTR, ODOTMETH, ODOTINTER, ORETJMP:
// n.Sym is a field/method name, not a variable.
default:
if n.Sym != nil {
@ -2143,7 +2143,7 @@ func typecheck1(n *Node, top int) *Node {
}
}
if safemode && !inimport && compiling_wrappers == 0 && t != nil && t.Etype == TUNSAFEPTR {
if safemode && !inimport && !compiling_wrappers && t != nil && t.Etype == TUNSAFEPTR {
yyerror("cannot use unsafe.Pointer")
}