[dev.regabi] cmd/compile: replace inlcopy with ir.DeepCopy

Now inlcopy and ir.DeepCopy are semantically the same,
so drop the inlcopy implementation.

Passes buildall w/ toolstash -cmp.

Change-Id: Id2abb39a412a8e57167a29be5ecf76e990dc9d3d
Reviewed-on: https://go-review.googlesource.com/c/go/+/275310
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

1 files changed, 1 insertions, 36 deletions

diff --git a/src/cmd/compile/internal/gc/inl.go b/src/cmd/compile/internal/gc/inl.go
index 980ba7429a..efd6fea844 100644
--- a/src/cmd/compile/internal/gc/inl.go
+++ b/src/cmd/compile/internal/gc/inl.go
@@ -218,7 +218,7 @@ func caninl(fn *ir.Func) {
 	n.Func().Inl = &ir.Inline{
 		Cost: inlineMaxBudget - visitor.budget,
 		Dcl:  pruneUnusedAutos(n.Defn.Func().Dcl, &visitor),
-		Body: inlcopylist(fn.Body().Slice()),
+		Body: ir.DeepCopyList(src.NoXPos, fn.Body().Slice()),
 	}
 
 	if base.Flag.LowerM > 1 {
@@ -447,41 +447,6 @@ func (v *hairyVisitor) visit(n ir.Node) bool {
 		v.visitList(n.Init()) || v.visitList(n.Body())
 }
 
-// inlcopylist (together with inlcopy) recursively copies a list of nodes, except
-// that it keeps the same ONAME, OTYPE, and OLITERAL nodes. It is used for copying
-// the body and dcls of an inlineable function.
-func inlcopylist(ll []ir.Node) []ir.Node {
-	s := make([]ir.Node, 0, len(ll))
-	for _, n := range ll {
-		s = append(s, inlcopy(n))
-	}
-	return s
-}
-
-func inlcopy(n ir.Node) ir.Node {
-	if n == nil {
-		return nil
-	}
-
-	switch n.Op() {
-	case ir.ONAME, ir.OTYPE, ir.OLITERAL, ir.ONIL:
-		return n
-	}
-
-	m := ir.Copy(n)
-	if n.Op() != ir.OCALLPART && m.Func() != nil {
-		base.Fatalf("unexpected Func: %v", m)
-	}
-	m.SetLeft(inlcopy(n.Left()))
-	m.SetRight(inlcopy(n.Right()))
-	m.PtrList().Set(inlcopylist(n.List().Slice()))
-	m.PtrRlist().Set(inlcopylist(n.Rlist().Slice()))
-	m.PtrInit().Set(inlcopylist(n.Init().Slice()))
-	m.PtrBody().Set(inlcopylist(n.Body().Slice()))
-
-	return m
-}
-
 func countNodes(n ir.Node) int {
 	if n == nil {
 		return 0