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cmd/compile: preserve 'any' type alias in unified IR 

When exporting the "any" empty interface type for unified IR, write it
out as a reference to the "any" alias, rather than to the underlying
empty interface. This matches how "byte" and "rune" are handled.

Verified to fix the issue demonstrated in CL 369975.

Change-Id: Ic2844b0acc3b17c20b3a40aaf262f62ec653eb5a
Reviewed-on: https://go-review.googlesource.com/c/go/+/370374
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
This commit is contained in:
Matthew Dempsky 2021-12-08 11:12:50 -08:00 committed by Russ Cox
parent ece493eb83
commit 8ff254e30b
1 changed files with 8 additions and 0 deletions
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8
src/cmd/compile/internal/noder/writer.go
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@ -229,6 +229,8 @@ func (pw *pkgWriter) pkgIdx(pkg *types2.Package) int {
// @@@ Types // @@@ Types
var anyTypeName = types2.Universe.Lookup("any").(*types2.TypeName)
func (w *writer) typ(typ types2.Type) { func (w *writer) typ(typ types2.Type) {
w.typInfo(w.p.typIdx(typ, w.dict)) w.typInfo(w.p.typIdx(typ, w.dict))
} }
@ -350,6 +352,12 @@ func (pw *pkgWriter) typIdx(typ types2.Type, dict *writerDict) typeInfo {
w.structType(typ) w.structType(typ)
case *types2.Interface: case *types2.Interface:
if typ == anyTypeName.Type() {
w.code(typeNamed)
w.obj(anyTypeName, nil)
break
}
w.code(typeInterface) w.code(typeInterface)
w.interfaceType(typ) w.interfaceType(typ)