[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/ssa/export_test.go b/src/cmd/compile/internal/ssa/export_test.go
index df83383308..5a81f76ceb 100644
--- a/src/cmd/compile/internal/ssa/export_test.go
+++ b/src/cmd/compile/internal/ssa/export_test.go
@@ -140,7 +140,7 @@ func init() {
 	// so this test setup can share it.
 
 	types.Tconv = func(t *types.Type, flag, mode int) string {
-		return t.Etype.String()
+		return t.Kind().String()
 	}
 	types.Sconv = func(s *types.Sym, flag, mode int) string {
 		return "sym"
@@ -149,13 +149,13 @@ func init() {
 		fmt.Fprintf(s, "sym")
 	}
 	types.FormatType = func(t *types.Type, s fmt.State, verb rune, mode int) {
-		fmt.Fprintf(s, "%v", t.Etype)
+		fmt.Fprintf(s, "%v", t.Kind())
 	}
 	types.Dowidth = func(t *types.Type) {}
 
 	for _, typ := range [...]struct {
 		width int64
-		et    types.EType
+		et    types.Kind
 	}{
 		{1, types.TINT8},
 		{1, types.TUINT8},