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[dev.typeparams] cmd/compile: fail early on unexpected types2.Invalid
In unified IR, fail right away if we find a types2.Invalid while writing out the package. This provides a clearer error message for https://github.com/golang/go/issues/25838#issuecomment-448746670. Updates #25838. Change-Id: I6902fdd891fc31bbb832b6fdba00eca301282409 Reviewed-on: https://go-review.googlesource.com/c/go/+/338973 Trust: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org>
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@ -282,19 +282,23 @@ func (pw *pkgWriter) typIdx(typ types2.Type, dict *writerDict) typeInfo {
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base.Fatalf("unexpected type: %v (%T)", typ, typ)
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base.Fatalf("unexpected type: %v (%T)", typ, typ)
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case *types2.Basic:
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case *types2.Basic:
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if kind := typ.Kind(); types2.Typ[kind] == typ {
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switch kind := typ.Kind(); {
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case kind == types2.Invalid:
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base.Fatalf("unexpected types2.Invalid")
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case types2.Typ[kind] == typ:
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w.code(typeBasic)
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w.code(typeBasic)
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w.len(int(kind))
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w.len(int(kind))
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break
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default:
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// Handle "byte" and "rune" as references to their TypeName.
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obj := types2.Universe.Lookup(typ.Name())
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assert(obj.Type() == typ)
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w.code(typeNamed)
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w.obj(obj, nil)
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}
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}
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// Handle "byte" and "rune" as references to their TypeName.
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obj := types2.Universe.Lookup(typ.Name())
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assert(obj.Type() == typ)
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w.code(typeNamed)
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w.obj(obj, nil)
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case *types2.Named:
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case *types2.Named:
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// Type aliases can refer to uninstantiated generic types, so we
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// Type aliases can refer to uninstantiated generic types, so we
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// might see len(TParams) != 0 && len(TArgs) == 0 here.
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// might see len(TParams) != 0 && len(TArgs) == 0 here.
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