test: add a test for gccgo bug #32901

This CL adds a test for gccgo bug #32901: not all the type
descriptors are registered and thus deduplicated with types
created by reflection. It needs a few levels of indirect imports
to trigger this bug.

Updates #32901.

Change-Id: Idbd89bedd63fea746769f2687f3f31c9767e5ec0
Reviewed-on: https://go-review.googlesource.com/c/go/+/184718
Reviewed-by: Ian Lance Taylor <iant@golang.org>

diff --git a/test/fixedbugs/issue32901.dir/a.go b/test/fixedbugs/issue32901.dir/a.go
new file mode 100644 (file)
index 0000000..54ed771
--- /dev/null
+++ b/test/fixedbugs/issue32901.dir/a.go
@@ -0,0 +1,15 @@
+// Copyright 2019 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 a
+
+type T struct { x int }
+
+func F() interface{} {
+       return [2]T{}
+}
+
+func P() interface{} {
+       return &[2]T{}
+}

diff --git a/test/fixedbugs/issue32901.dir/b.go b/test/fixedbugs/issue32901.dir/b.go
new file mode 100644 (file)
index 0000000..932d7b0
--- /dev/null
+++ b/test/fixedbugs/issue32901.dir/b.go
@@ -0,0 +1,15 @@
+// Copyright 2019 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 b
+
+import "./a"
+
+func F() interface{} {
+       return a.F()
+}
+
+func P() interface{} {
+       return a.P()
+}

diff --git a/test/fixedbugs/issue32901.dir/c.go b/test/fixedbugs/issue32901.dir/c.go
new file mode 100644 (file)
index 0000000..5f31c7f
--- /dev/null
+++ b/test/fixedbugs/issue32901.dir/c.go
@@ -0,0 +1,17 @@
+// Copyright 2019 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 c
+
+import "./b"
+
+func F() interface{} {
+       go func(){}() // make it non-inlineable
+       return b.F()
+}
+
+func P() interface{} {
+       go func(){}() // make it non-inlineable
+       return b.P()
+}

diff --git a/test/fixedbugs/issue32901.dir/main.go b/test/fixedbugs/issue32901.dir/main.go
new file mode 100644 (file)
index 0000000..28bb8cd
--- /dev/null
+++ b/test/fixedbugs/issue32901.dir/main.go
@@ -0,0 +1,18 @@
+// Copyright 2019 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 main
+
+import "./c"
+import "reflect"
+
+func main() {
+       x := c.F()
+       p := c.P()
+       t := reflect.PtrTo(reflect.TypeOf(x))
+       tp := reflect.TypeOf(p)
+       if t != tp {
+               panic("FAIL")
+       }
+}

diff --git a/test/fixedbugs/issue32901.go b/test/fixedbugs/issue32901.go
new file mode 100644 (file)
index 0000000..004c3da
--- /dev/null
+++ b/test/fixedbugs/issue32901.go
@@ -0,0 +1,9 @@
+// rundir
+
+// Copyright 2019 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.
+
+// Issue 32901: type descriptor equality bug in gccgo.
+
+package ignored