cmd: remove GOEXPERIMENT=nounified knob

This CL removes the GOEXPERIMENT=nounified knob, and any conditional
statements that depend on that knob. Further CLs to remove unreachable
code follow this one.

Updates #57410.

Change-Id: I39c147e1a83601c73f8316a001705778fee64a91
Reviewed-on: https://go-review.googlesource.com/c/go/+/458615
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>

1 files changed, 2 insertions, 45 deletions

diff --git a/src/cmd/compile/internal/walk/closure.go b/src/cmd/compile/internal/walk/closure.go
index 590c9a3ad4..42750c2125 100644
--- a/src/cmd/compile/internal/walk/closure.go
+++ b/src/cmd/compile/internal/walk/closure.go
@@ -217,7 +217,6 @@ func methodValueWrapper(dot *ir.SelectorExpr) *ir.Name {
 		base.Fatalf("methodValueWrapper: unexpected %v (%v)", dot, dot.Op())
 	}
 
-	t0 := dot.Type()
 	meth := dot.Sel
 	rcvrtype := dot.X.Type()
 	sym := ir.MethodSymSuffix(rcvrtype, meth, "-fm")
@@ -227,48 +226,6 @@ func methodValueWrapper(dot *ir.SelectorExpr) *ir.Name {
 	}
 	sym.SetUniq(true)
 
-	if base.Debug.Unified != 0 {
-		base.FatalfAt(dot.Pos(), "missing wrapper for %v", meth)
-	}
-
-	savecurfn := ir.CurFunc
-	saveLineNo := base.Pos
-	ir.CurFunc = nil
-
-	base.Pos = base.AutogeneratedPos
-
-	fn := typecheck.DeclFunc(sym, nil,
-		typecheck.NewFuncParams(t0.Params(), true),
-		typecheck.NewFuncParams(t0.Results(), false))
-	fn.SetDupok(true)
-	fn.SetWrapper(true)
-
-	// Declare and initialize variable holding receiver.
-	ptr := ir.NewHiddenParam(base.Pos, fn, typecheck.Lookup(".this"), rcvrtype)
-
-	call := ir.NewCallExpr(base.Pos, ir.OCALL, ir.NewSelectorExpr(base.Pos, ir.OXDOT, ptr, meth), nil)
-	call.Args = ir.ParamNames(fn.Type())
-	call.IsDDD = fn.Type().IsVariadic()
-
-	var body ir.Node = call
-	if t0.NumResults() != 0 {
-		ret := ir.NewReturnStmt(base.Pos, nil)
-		ret.Results = []ir.Node{call}
-		body = ret
-	}
-
-	fn.Body = []ir.Node{body}
-	typecheck.FinishFuncBody()
-
-	typecheck.Func(fn)
-	// Need to typecheck the body of the just-generated wrapper.
-	// typecheckslice() requires that Curfn is set when processing an ORETURN.
-	ir.CurFunc = fn
-	typecheck.Stmts(fn.Body)
-	sym.Def = fn.Nname
-	typecheck.Target.Decls = append(typecheck.Target.Decls, fn)
-	ir.CurFunc = savecurfn
-	base.Pos = saveLineNo
-
-	return fn.Nname
+	base.FatalfAt(dot.Pos(), "missing wrapper for %v", meth)
+	panic("unreachable")
 }