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cmd/compile: remove unneeded calls to typecheck in noder2

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Remove unneeded calls to typecheck in noder2 associated with g.use() and
g.obj(). These routines are already setting the types2-derived type
correctly for ONAME nodes, and there is no typechecker1-related
transformations related to ONAME nodes, other than making sure that
newly created closure variables have their type set.

Tested through normal -G=3 testing in all.bash (all of go/tests).

Change-Id: I1b790ab9948959685fca3a768401458201833671
Reviewed-on: https://go-review.googlesource.com/c/go/+/303029
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Dan Scales <danscales@google.com>
This commit is contained in:
Dan Scales 2021-03-17 17:54:41 -07:00
parent eaa1ddee84
commit f47fab938e
2 changed files with 18 additions and 9 deletions
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7
src/cmd/compile/internal/noder/expr.go
View File

@ -30,7 +30,6 @@ func (g *irgen) expr(expr syntax.Expr) ir.Node {
}
switch {
case tv.IsBuiltin():
// TODO(mdempsky): Handle in CallExpr?
return g.use(expr.(*syntax.Name))
case tv.IsType():
return ir.TypeNode(g.typ(tv.Type))
@ -82,8 +81,7 @@ func (g *irgen) expr0(typ types2.Type, expr syntax.Expr) ir.Node {
if _, isNil := g.info.Uses[expr].(*types2.Nil); isNil {
return Nil(pos, g.typ(typ))
}
// TODO(mdempsky): Remove dependency on typecheck.Expr.
return typecheck.Expr(g.use(expr))
return g.use(expr)
case *syntax.CompositeLit:
return g.compLit(typ, expr)
@ -157,8 +155,7 @@ func (g *irgen) expr0(typ types2.Type, expr syntax.Expr) ir.Node {
// Qualified identifier.
if name, ok := expr.X.(*syntax.Name); ok {
if _, ok := g.info.Uses[name].(*types2.PkgName); ok {
// TODO(mdempsky): Remove dependency on typecheck.Expr.
return typecheck.Expr(g.use(expr.Sel))
return g.use(expr.Sel)
}
}
return g.selectorExpr(pos, typ, expr)

20
src/cmd/compile/internal/noder/object.go
View File

@ -22,16 +22,26 @@ func (g *irgen) def(name *syntax.Name) (*ir.Name, types2.Object) {
return g.obj(obj), obj
}
// use returns the Name node associated with the use of name. The returned node
// will have the correct type and be marked as typechecked.
func (g *irgen) use(name *syntax.Name) *ir.Name {
obj, ok := g.info.Uses[name]
obj2, ok := g.info.Uses[name]
if !ok {
base.FatalfAt(g.pos(name), "unknown name %v", name)
}
return ir.CaptureName(g.pos(obj), ir.CurFunc, g.obj(obj))
obj := ir.CaptureName(g.pos(obj2), ir.CurFunc, g.obj(obj2))
if obj.Defn != nil && obj.Defn.Op() == ir.ONAME {
// If CaptureName created a closure variable, then transfer the
// type of the captured name to the new closure variable.
obj.SetTypecheck(1)
obj.SetType(obj.Defn.Type())
}
return obj
}
// obj returns the Name that represents the given object. If no such
// Name exists yet, it will be implicitly created.
// obj returns the Name that represents the given object. If no such Name exists
// yet, it will be implicitly created. The returned node will have the correct
// type and be marked as typechecked.
//
// For objects declared at function scope, ir.CurFunc must already be
// set to the respective function when the Name is created.
@ -45,6 +55,7 @@ func (g *irgen) obj(obj types2.Object) *ir.Name {
}
n := typecheck.Resolve(ir.NewIdent(src.NoXPos, sym))
if n, ok := n.(*ir.Name); ok {
n.SetTypecheck(1)
return n
}
base.FatalfAt(g.pos(obj), "failed to resolve %v", obj)
@ -117,6 +128,7 @@ func (g *irgen) obj(obj types2.Object) *ir.Name {
}
g.objs[obj] = name
name.SetTypecheck(1)
return name
}