[dev.regabi] cmd/compile: first pass at abstracting Type

Passes toolstash/buildall.

[git-generate]
cd src/cmd/compile/internal/ssa
rf '
ex . ../ir ../gc {
  import "cmd/compile/internal/types"
  var t *types.Type
  t.Etype -> t.Kind()
  t.Sym -> t.GetSym()
  t.Orig -> t.Underlying()
}
'

cd ../types
rf '
mv EType Kind
mv IRNode Object

mv Type.Etype Type.kind
mv Type.Sym Type.sym
mv Type.Orig Type.underlying
mv Type.Cache Type.cache

mv Type.GetSym Type.Sym

mv Bytetype ByteType
mv Runetype RuneType
mv Errortype ErrorType
'

cd ../gc
sed -i 's/Bytetype/ByteType/; s/Runetype/RuneType/' mkbuiltin.go

git codereview gofmt
go install cmd/compile/internal/...
go test cmd/compile -u || go test cmd/compile

Change-Id: Ibecb2d7100d3318a49238eb4a78d70acb49eedca
Reviewed-on: https://go-review.googlesource.com/c/go/+/274437
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/cmd/compile/internal/gc/obj.go b/src/cmd/compile/internal/gc/obj.go
index 7b5e3015c2..f65131417a 100644
--- a/src/cmd/compile/internal/gc/obj.go
+++ b/src/cmd/compile/internal/gc/obj.go
@@ -218,7 +218,7 @@ func addptabs() {
 		if s.Pkg.Name != "main" {
 			continue
 		}
-		if n.Type().Etype == types.TFUNC && n.Class() == ir.PFUNC {
+		if n.Type().Kind() == types.TFUNC && n.Class() == ir.PFUNC {
 			// function
 			ptabs = append(ptabs, ptabEntry{s: s, t: ir.AsNode(s.Def).Type()})
 		} else {
@@ -602,7 +602,7 @@ func litsym(n, c ir.Node, wid int) {
 
 	case constant.Float:
 		f, _ := constant.Float64Val(u)
-		switch n.Type().Etype {
+		switch n.Type().Kind() {
 		case types.TFLOAT32:
 			s.WriteFloat32(base.Ctxt, n.Offset(), float32(f))
 		case types.TFLOAT64:
@@ -612,7 +612,7 @@ func litsym(n, c ir.Node, wid int) {
 	case constant.Complex:
 		re, _ := constant.Float64Val(constant.Real(u))
 		im, _ := constant.Float64Val(constant.Imag(u))
-		switch n.Type().Etype {
+		switch n.Type().Kind() {
 		case types.TCOMPLEX64:
 			s.WriteFloat32(base.Ctxt, n.Offset(), float32(re))
 			s.WriteFloat32(base.Ctxt, n.Offset()+4, float32(im))