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cmd/compile: emit unified IR wrappers after inlining

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This CL delays unified IR's wrapper generation to after inlining.

Change-Id: Idfe496663489d6b797a647eb17200c6322d0334a
Reviewed-on: https://go-review.googlesource.com/c/go/+/347029
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
This commit is contained in:
Matthew Dempsky 2021-09-01 11:53:36 -07:00
parent 5e0f8edbdc
commit 50f38d0405
3 changed files with 47 additions and 42 deletions
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1
src/cmd/compile/internal/gc/main.go
View File

@ -245,6 +245,7 @@ func Main(archInit func(*ssagen.ArchInfo)) {
if base.Flag.LowerL != 0 { if base.Flag.LowerL != 0 {
inline.InlinePackage() inline.InlinePackage()
} }
noder.MakeWrappers(typecheck.Target) // must happen after inlining
// Devirtualize. // Devirtualize.
for _, n := range typecheck.Target.Decls { for _, n := range typecheck.Target.Decls {

83
src/cmd/compile/internal/noder/reader.go
View File

@ -149,7 +149,7 @@ type readerDict struct {
funcsObj []ir.Node funcsObj []ir.Node
} }
func (r *reader) setType(n ir.Node, typ *types.Type) { func setType(n ir.Node, typ *types.Type) {
n.SetType(typ) n.SetType(typ)
n.SetTypecheck(1) n.SetTypecheck(1)
@ -159,7 +159,7 @@ func (r *reader) setType(n ir.Node, typ *types.Type) {
} }
} }
func (r *reader) setValue(name *ir.Name, val constant.Value) { func setValue(name *ir.Name, val constant.Value) {
name.SetVal(val) name.SetVal(val)
name.Defn = nil name.Defn = nil
} }
@ -602,15 +602,15 @@ func (pr *pkgReader) objIdx(idx int, implicits, explicits []*types.Type) ir.Node
case objAlias: case objAlias:
name := do(ir.OTYPE, false) name := do(ir.OTYPE, false)
r.setType(name, r.typ()) setType(name, r.typ())
name.SetAlias(true) name.SetAlias(true)
return name return name
case objConst: case objConst:
name := do(ir.OLITERAL, false) name := do(ir.OLITERAL, false)
typ, val := r.value() typ, val := r.value()
r.setType(name, typ) setType(name, typ)
r.setValue(name, val) setValue(name, val)
return name return name
case objFunc: case objFunc:
@ -618,7 +618,7 @@ func (pr *pkgReader) objIdx(idx int, implicits, explicits []*types.Type) ir.Node
sym = renameinit() sym = renameinit()
} }
name := do(ir.ONAME, true) name := do(ir.ONAME, true)
r.setType(name, r.signature(sym.Pkg, nil)) setType(name, r.signature(sym.Pkg, nil))
name.Func = ir.NewFunc(r.pos()) name.Func = ir.NewFunc(r.pos())
name.Func.Nname = name name.Func.Nname = name
@ -629,7 +629,7 @@ func (pr *pkgReader) objIdx(idx int, implicits, explicits []*types.Type) ir.Node
case objType: case objType:
name := do(ir.OTYPE, true) name := do(ir.OTYPE, true)
typ := types.NewNamed(name) typ := types.NewNamed(name)
r.setType(name, typ) setType(name, typ)
// Important: We need to do this before SetUnderlying. // Important: We need to do this before SetUnderlying.
r.ext.typeExt(name) r.ext.typeExt(name)
@ -654,7 +654,7 @@ func (pr *pkgReader) objIdx(idx int, implicits, explicits []*types.Type) ir.Node
case objVar: case objVar:
name := do(ir.ONAME, false) name := do(ir.ONAME, false)
r.setType(name, r.typ()) setType(name, r.typ())
r.ext.varExt(name) r.ext.varExt(name)
return name return name
} }
@ -754,7 +754,7 @@ func (r *reader) method() *types.Field {
fnsym := sym fnsym := sym
fnsym = ir.MethodSym(recv.Type, fnsym) fnsym = ir.MethodSym(recv.Type, fnsym)
name := ir.NewNameAt(pos, fnsym) name := ir.NewNameAt(pos, fnsym)
r.setType(name, typ) setType(name, typ)
name.Func = ir.NewFunc(r.pos()) name.Func = ir.NewFunc(r.pos())
name.Func.Nname = name name.Func.Nname = name
@ -996,7 +996,7 @@ func (r *reader) funcarg(param *types.Field, sym *types.Sym, ctxt ir.Class) {
} }
name := ir.NewNameAt(r.updatePos(param.Pos), sym) name := ir.NewNameAt(r.updatePos(param.Pos), sym)
r.setType(name, param.Type) setType(name, param.Type)
r.addLocal(name, ctxt) r.addLocal(name, ctxt)
if r.inlCall == nil { if r.inlCall == nil {
@ -1276,7 +1276,7 @@ func (r *reader) stmt1(tag codeStmt, out *ir.Nodes) ir.Node {
name := ir.NewDeclNameAt(src.NoXPos, ir.OTYPE, ir.BlankNode.Sym()) name := ir.NewDeclNameAt(src.NoXPos, ir.OTYPE, ir.BlankNode.Sym())
name.SetAlias(true) name.SetAlias(true)
r.setType(name, types.Types[types.TINT]) setType(name, types.Types[types.TINT])
n := ir.NewDecl(src.NoXPos, ir.ODCLTYPE, name) n := ir.NewDecl(src.NoXPos, ir.ODCLTYPE, name)
n.SetTypecheck(1) n.SetTypecheck(1)
@ -1297,7 +1297,7 @@ func (r *reader) assignList() ([]*ir.Name, []ir.Node) {
name := ir.NewNameAt(pos, sym) name := ir.NewNameAt(pos, sym)
lhs[i] = name lhs[i] = name
names = append(names, name) names = append(names, name)
r.setType(name, typ) setType(name, typ)
r.addLocal(name, ir.PAUTO) r.addLocal(name, ir.PAUTO)
continue continue
} }
@ -1438,7 +1438,7 @@ func (r *reader) switchStmt(label *types.Sym) ir.Node {
typ := r.typ() typ := r.typ()
name := ir.NewNameAt(pos, tswitch.Tag.Sym()) name := ir.NewNameAt(pos, tswitch.Tag.Sym())
r.setType(name, typ) setType(name, typ)
r.addLocal(name, ir.PAUTO) r.addLocal(name, ir.PAUTO)
clause.Var = name clause.Var = name
name.Defn = tswitch name.Defn = tswitch
@ -1701,12 +1701,12 @@ func (r *reader) funcLit() ir.Node {
clo := fn.OClosure clo := fn.OClosure
ir.NameClosure(clo, r.curfn) ir.NameClosure(clo, r.curfn)
r.setType(fn.Nname, xtype2) setType(fn.Nname, xtype2)
if quirksMode() { if quirksMode() {
fn.Nname.Ntype = ir.TypeNodeAt(typPos, xtype2) fn.Nname.Ntype = ir.TypeNodeAt(typPos, xtype2)
} }
typecheck.Func(fn) typecheck.Func(fn)
r.setType(clo, fn.Type()) setType(clo, fn.Type())
fn.ClosureVars = make([]*ir.Name, 0, r.len()) fn.ClosureVars = make([]*ir.Name, 0, r.len())
for len(fn.ClosureVars) < cap(fn.ClosureVars) { for len(fn.ClosureVars) < cap(fn.ClosureVars) {
@ -1910,7 +1910,7 @@ func InlineCall(call *ir.CallExpr, fn *ir.Func, inlIndex int) *ir.InlinedCallExp
tmpfn.Closgen = callerfn.Closgen tmpfn.Closgen = callerfn.Closgen
defer func() { callerfn.Closgen = tmpfn.Closgen }() defer func() { callerfn.Closgen = tmpfn.Closgen }()
r.setType(tmpfn.Nname, fn.Type()) setType(tmpfn.Nname, fn.Type())
r.curfn = tmpfn r.curfn = tmpfn
r.inlCaller = callerfn r.inlCaller = callerfn
@ -2098,7 +2098,7 @@ func expandInline(fn *ir.Func, pri pkgReaderIndex) {
{ {
r := pri.asReader(relocBody, syncFuncBody) r := pri.asReader(relocBody, syncFuncBody)
r.setType(tmpfn.Nname, fn.Type()) setType(tmpfn.Nname, fn.Type())
// Don't change parameter's Sym/Nname fields. // Don't change parameter's Sym/Nname fields.
r.funarghack = true r.funarghack = true
@ -2194,34 +2194,39 @@ func (r *reader) importedDef() bool {
return r.p != localPkgReader && !r.hasTypeParams() return r.p != localPkgReader && !r.hasTypeParams()
} }
func (r *reader) wrapTypes(target *ir.Package) { func MakeWrappers(target *ir.Package) {
// Only unified IR in non-quirks mode emits its own wrappers.
if base.Debug.Unified == 0 || quirksMode() {
return
}
// always generate a wrapper for error.Error (#29304) // always generate a wrapper for error.Error (#29304)
r.needWrapper(types.ErrorType) needWrapperTypes = append(needWrapperTypes, types.ErrorType)
seen := make(map[string]*types.Type) seen := make(map[string]*types.Type)
for _, typ := range haveWrapperTypes { for _, typ := range haveWrapperTypes {
r.wrapType(typ, target, seen, false) wrapType(typ, target, seen, false)
} }
haveWrapperTypes = nil haveWrapperTypes = nil
for _, typ := range needWrapperTypes { for _, typ := range needWrapperTypes {
r.wrapType(typ, target, seen, true) wrapType(typ, target, seen, true)
} }
needWrapperTypes = nil needWrapperTypes = nil
for _, wrapper := range haveMethodValueWrappers { for _, wrapper := range haveMethodValueWrappers {
r.methodValueWrapper(wrapper.rcvr, wrapper.method, target, false) wrapMethodValue(wrapper.rcvr, wrapper.method, target, false)
} }
haveMethodValueWrappers = nil haveMethodValueWrappers = nil
for _, wrapper := range needMethodValueWrappers { for _, wrapper := range needMethodValueWrappers {
r.methodValueWrapper(wrapper.rcvr, wrapper.method, target, true) wrapMethodValue(wrapper.rcvr, wrapper.method, target, true)
} }
needMethodValueWrappers = nil needMethodValueWrappers = nil
} }
func (r *reader) wrapType(typ *types.Type, target *ir.Package, seen map[string]*types.Type, needed bool) { func wrapType(typ *types.Type, target *ir.Package, seen map[string]*types.Type, needed bool) {
key := typ.LinkString() key := typ.LinkString()
if prev := seen[key]; prev != nil { if prev := seen[key]; prev != nil {
if !types.Identical(typ, prev) { if !types.Identical(typ, prev) {
@ -2244,22 +2249,22 @@ func (r *reader) wrapType(typ *types.Type, target *ir.Package, seen map[string]*
base.FatalfAt(meth.Pos, "invalid method: %v", meth) base.FatalfAt(meth.Pos, "invalid method: %v", meth)
} }
r.methodWrapper(0, typ, meth, target) methodWrapper(0, typ, meth, target)
// For non-interface types, we also want *T wrappers. // For non-interface types, we also want *T wrappers.
if !typ.IsInterface() { if !typ.IsInterface() {
r.methodWrapper(1, typ, meth, target) methodWrapper(1, typ, meth, target)
// For not-in-heap types, *T is a scalar, not pointer shaped, // For not-in-heap types, *T is a scalar, not pointer shaped,
// so the interface wrappers use **T. // so the interface wrappers use **T.
if typ.NotInHeap() { if typ.NotInHeap() {
r.methodWrapper(2, typ, meth, target) methodWrapper(2, typ, meth, target)
} }
} }
} }
} }
func (r *reader) methodWrapper(derefs int, tbase *types.Type, method *types.Field, target *ir.Package) { func methodWrapper(derefs int, tbase *types.Type, method *types.Field, target *ir.Package) {
wrapper := tbase wrapper := tbase
for i := 0; i < derefs; i++ { for i := 0; i < derefs; i++ {
wrapper = types.NewPtr(wrapper) wrapper = types.NewPtr(wrapper)
@ -2279,7 +2284,7 @@ func (r *reader) methodWrapper(derefs int, tbase *types.Type, method *types.Fiel
// TODO(mdempsky): Use method.Pos instead? // TODO(mdempsky): Use method.Pos instead?
pos := base.AutogeneratedPos pos := base.AutogeneratedPos
fn := r.newWrapperFunc(pos, sym, wrapper, method) fn := newWrapperFunc(pos, sym, wrapper, method)
var recv ir.Node = fn.Nname.Type().Recv().Nname.(*ir.Name) var recv ir.Node = fn.Nname.Type().Recv().Nname.(*ir.Name)
@ -2299,10 +2304,10 @@ func (r *reader) methodWrapper(derefs int, tbase *types.Type, method *types.Fiel
addTailCall(pos, fn, recv, method) addTailCall(pos, fn, recv, method)
r.finishWrapperFunc(fn, target) finishWrapperFunc(fn, target)
} }
func (r *reader) methodValueWrapper(recvType *types.Type, method *types.Field, target *ir.Package, needed bool) { func wrapMethodValue(recvType *types.Type, method *types.Field, target *ir.Package, needed bool) {
sym := ir.MethodSymSuffix(recvType, method.Sym, "-fm") sym := ir.MethodSymSuffix(recvType, method.Sym, "-fm")
if sym.Uniq() { if sym.Uniq() {
return return
@ -2312,7 +2317,7 @@ func (r *reader) methodValueWrapper(recvType *types.Type, method *types.Field, t
// TODO(mdempsky): Use method.Pos instead? // TODO(mdempsky): Use method.Pos instead?
pos := base.AutogeneratedPos pos := base.AutogeneratedPos
fn := r.newWrapperFunc(pos, sym, nil, method) fn := newWrapperFunc(pos, sym, nil, method)
sym.Def = fn.Nname sym.Def = fn.Nname
// Declare and initialize variable holding receiver. // Declare and initialize variable holding receiver.
@ -2325,10 +2330,10 @@ func (r *reader) methodValueWrapper(recvType *types.Type, method *types.Field, t
addTailCall(pos, fn, recv, method) addTailCall(pos, fn, recv, method)
r.finishWrapperFunc(fn, target) finishWrapperFunc(fn, target)
} }
func (r *reader) newWrapperFunc(pos src.XPos, sym *types.Sym, wrapper *types.Type, method *types.Field) *ir.Func { func newWrapperFunc(pos src.XPos, sym *types.Sym, wrapper *types.Type, method *types.Field) *ir.Func {
fn := ir.NewFunc(pos) fn := ir.NewFunc(pos)
fn.SetDupok(true) // TODO(mdempsky): Leave unset for local, non-generic wrappers? fn.SetDupok(true) // TODO(mdempsky): Leave unset for local, non-generic wrappers?
@ -2339,14 +2344,14 @@ func (r *reader) newWrapperFunc(pos src.XPos, sym *types.Sym, wrapper *types.Typ
fn.Nname = name fn.Nname = name
sig := newWrapperType(wrapper, method) sig := newWrapperType(wrapper, method)
r.setType(name, sig) setType(name, sig)
// TODO(mdempsky): De-duplicate with similar logic in funcargs. // TODO(mdempsky): De-duplicate with similar logic in funcargs.
defParams := func(class ir.Class, params *types.Type) { defParams := func(class ir.Class, params *types.Type) {
for _, param := range params.FieldSlice() { for _, param := range params.FieldSlice() {
name := ir.NewNameAt(param.Pos, param.Sym) name := ir.NewNameAt(param.Pos, param.Sym)
name.Class = class name.Class = class
r.setType(name, param.Type) setType(name, param.Type)
name.Curfn = fn name.Curfn = fn
fn.Dcl = append(fn.Dcl, name) fn.Dcl = append(fn.Dcl, name)
@ -2362,13 +2367,17 @@ func (r *reader) newWrapperFunc(pos src.XPos, sym *types.Sym, wrapper *types.Typ
return fn return fn
} }
func (r *reader) finishWrapperFunc(fn *ir.Func, target *ir.Package) { func finishWrapperFunc(fn *ir.Func, target *ir.Package) {
typecheck.Func(fn) typecheck.Func(fn)
ir.WithFunc(fn, func() { ir.WithFunc(fn, func() {
typecheck.Stmts(fn.Body) typecheck.Stmts(fn.Body)
}) })
// We generate wrappers after the global inlining pass,
// so we're responsible for applying inlining ourselves here.
inline.InlineCalls(fn)
target.Decls = append(target.Decls, fn) target.Decls = append(target.Decls, fn)
} }

5
src/cmd/compile/internal/noder/unified.go
View File

@ -138,11 +138,6 @@ func unified(noders []*noder) {
} }
todoBodies = nil todoBodies = nil
if !quirksMode() {
// TODO(mdempsky): Investigate generating wrappers in quirks mode too.
r.wrapTypes(target)
}
// Check that nothing snuck past typechecking. // Check that nothing snuck past typechecking.
for _, n := range target.Decls { for _, n := range target.Decls {
if n.Typecheck() == 0 { if n.Typecheck() == 0 {