From efbe17d6f1f016616453d43208200ebf4a45d87c Mon Sep 17 00:00:00 2001
From: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Date: Mon, 4 Apr 2022 14:07:36 +0700
Subject: [PATCH] cmd/compile: support reading union type for compiler backend
in unified IR
Fixes #52124
Change-Id: I5749822d41d8e51f476bceb277b1d2cf7350dcc3
Reviewed-on: https://go-review.googlesource.com/c/go/+/397874
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
---
src/cmd/compile/internal/noder/reader.go | 12 ++++++++++++
test/typeparam/issue52124.go | 9 +++++++++
2 files changed, 21 insertions(+)
create mode 100644 test/typeparam/issue52124.go
diff --git a/src/cmd/compile/internal/noder/reader.go b/src/cmd/compile/internal/noder/reader.go
index 01e795183d8..71efac80aa7 100644
--- a/src/cmd/compile/internal/noder/reader.go
+++ b/src/cmd/compile/internal/noder/reader.go
@@ -442,9 +442,21 @@ func (r *reader) doTyp() *types.Type {
return r.structType()
case pkgbits.TypeInterface:
return r.interfaceType()
+ case pkgbits.TypeUnion:
+ return r.unionType()
}
}
+func (r *reader) unionType() *types.Type {
+ terms := make([]*types.Type, r.Len())
+ tildes := make([]bool, len(terms))
+ for i := range terms {
+ tildes[i] = r.Bool()
+ terms[i] = r.typ()
+ }
+ return types.NewUnion(terms, tildes)
+}
+
func (r *reader) interfaceType() *types.Type {
tpkg := types.LocalPkg // TODO(mdempsky): Remove after iexport is gone.
diff --git a/test/typeparam/issue52124.go b/test/typeparam/issue52124.go
new file mode 100644
index 00000000000..56318d5d4ce
--- /dev/null
+++ b/test/typeparam/issue52124.go
@@ -0,0 +1,9 @@
+// compile
+
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+type I interface{ any | int }
--
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