test: new testcase for gccgo compiler bug

Updates #33013

Change-Id: I3db062b37860bb0c6c99a553408b47cf0313531e
Reviewed-on: https://go-review.googlesource.com/c/go/+/185517
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

test/fixedbugs/issue33013.dir/a.go

+// 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 G interface {
+	UsesEmpty(p interface{}) int
+}

test/fixedbugs/issue33013.dir/b.go

+// 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"
+
+type Service uint64
+type ServiceDesc struct {
+	X int
+	uc
+}
+
+type uc interface {
+	f() a.G
+}
+
+var q int
+
+func RS(svcd *ServiceDesc, server interface{}, qq uint8) *Service {
+	defer func() { q += int(qq) }()
+	return nil
+}

test/fixedbugs/issue33013.dir/c.go

+// 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 (
+	"a"
+	"b"
+)
+
+type BI interface {
+	Something(s int64) int64
+	Another(pxp a.G) int32
+}
+
+func BRS(sd *b.ServiceDesc, server BI, xyz int) *b.Service {
+	return b.RS(sd, server, 7)
+}

test/fixedbugs/issue33013.dir/d.go

+// 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 d
+
+import (
+	"b"
+	"c"
+)
+
+var GA b.Service
+
+func C() {
+	c.BRS(nil, nil, 22)
+}

test/fixedbugs/issue33013.go

+// compiledir
+
+// 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 33013: gccgo compiler error with inlinable function
+
+package ignored