[dev.regabi] cmd/compile: rewrite Aux uses of ir.Node to *ir.Name [generated]

Now that the only remaining ir.Node implementation that is stored
(directly) into ssa.Aux, we can rewrite all of the conversions between
ir.Node and ssa.Aux to use *ir.Name instead.

rf doesn't have a way to rewrite the type switch case clauses, so we
just use sed instead. There's only a handful, and they're the only
times that "case ir.Node" appears anyway.

The next CL will move the tag method declarations so that ir.Node no
longer implements ssa.Aux.

Passes buildall w/ toolstash -cmp.

Updates #42982.

[git-generate]
cd src/cmd/compile/internal
sed -i -e 's/case ir.Node/case *ir.Name/' gc/plive.go */ssa.go

cd ssa
rf '
ex . ../gc {
  import "cmd/compile/internal/ir"

  var v *Value
  v.Aux.(ir.Node) -> v.Aux.(*ir.Name)

  var n ir.Node
  var asAux func(Aux)
  strict n        # only match ir.Node-typed expressions; not *ir.Name
  implicit asAux  # match implicit assignments to ssa.Aux
  asAux(n)        -> n.(*ir.Name)
}
'

Change-Id: I3206ef5f12a7cfa37c5fecc67a1ca02ea4d52b32
Reviewed-on: https://go-review.googlesource.com/c/go/+/275789
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/src/cmd/compile/internal/ssa/deadstore.go b/src/cmd/compile/internal/ssa/deadstore.go
index f3ef33d670..d0446a0311 100644
--- a/src/cmd/compile/internal/ssa/deadstore.go
+++ b/src/cmd/compile/internal/ssa/deadstore.go
@@ -147,7 +147,7 @@ func elimDeadAutosGeneric(f *Func) {
 		switch v.Op {
 		case OpAddr, OpLocalAddr:
 			// Propagate the address if it points to an auto.
-			n, ok := v.Aux.(ir.Node)
+			n, ok := v.Aux.(*ir.Name)
 			if !ok || n.Class() != ir.PAUTO {
 				return
 			}
@@ -158,7 +158,7 @@ func elimDeadAutosGeneric(f *Func) {
 			return
 		case OpVarDef, OpVarKill:
 			// v should be eliminated if we eliminate the auto.
-			n, ok := v.Aux.(ir.Node)
+			n, ok := v.Aux.(*ir.Name)
 			if !ok || n.Class() != ir.PAUTO {
 				return
 			}
@@ -174,7 +174,7 @@ func elimDeadAutosGeneric(f *Func) {
 			// for open-coded defers from being removed (since they
 			// may not be used by the inline code, but will be used by
 			// panic processing).
-			n, ok := v.Aux.(ir.Node)
+			n, ok := v.Aux.(*ir.Name)
 			if !ok || n.Class() != ir.PAUTO {
 				return
 			}
@@ -303,7 +303,7 @@ func elimUnreadAutos(f *Func) {
 	var stores []*Value
 	for _, b := range f.Blocks {
 		for _, v := range b.Values {
-			n, ok := v.Aux.(ir.Node)
+			n, ok := v.Aux.(*ir.Name)
 			if !ok {
 				continue
 			}
@@ -335,7 +335,7 @@ func elimUnreadAutos(f *Func) {
 
 	// Eliminate stores to unread autos.
 	for _, store := range stores {
-		n, _ := store.Aux.(ir.Node)
+		n, _ := store.Aux.(*ir.Name)
 		if seen[n] {
 			continue
 		}