cmd/gc: fix missing export data for inlining in a few other cases.

Exported inlined functions that perform a string conversion
using a non-exported named type may miss it in export data.

Fixes #5755.

R=rsc, golang-dev, ality, r
CC=golang-dev
https://golang.org/cl/10464043

src/cmd/gc/export.c

@@ -161,6 +161,11 @@ reexportdep(Node *n)
 	case OCONV:
 	case OCONVIFACE:
 	case OCONVNOP:
+	case ORUNESTR:
+	case OARRAYBYTESTR:
+	case OARRAYRUNESTR:
+	case OSTRARRAYBYTE:
+	case OSTRARRAYRUNE:
 	case ODOTTYPE:
 	case ODOTTYPE2:
 	case OSTRUCTLIT:

test/fixedbugs/issue5755.dir/a.go

+// Copyright 2013 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 I interface {
+	F()
+}
+
+type foo1 []byte
+type foo2 []rune
+type foo3 []uint8
+type foo4 []int32
+type foo5 string
+type foo6 string
+type foo7 string
+type foo8 string
+type foo9 string
+
+func (f foo1) F() { return }
+func (f foo2) F() { return }
+func (f foo3) F() { return }
+func (f foo4) F() { return }
+func (f foo5) F() { return }
+func (f foo6) F() { return }
+func (f foo7) F() { return }
+func (f foo8) F() { return }
+func (f foo9) F() { return }
+
+func Test1(s string) I  { return foo1(s) }
+func Test2(s string) I  { return foo2(s) }
+func Test3(s string) I  { return foo3(s) }
+func Test4(s string) I  { return foo4(s) }
+func Test5(s []byte) I  { return foo5(s) }
+func Test6(s []rune) I  { return foo6(s) }
+func Test7(s []uint8) I { return foo7(s) }
+func Test8(s []int32) I { return foo8(s) }
+func Test9(s int) I     { return foo9(s) }
+
+type bar map[int]int
+
+func (b bar) F() { return }
+
+func TestBar() I { return bar{1: 2} }
+
+type baz int
+
+func IsBaz(x interface{}) bool { _, ok := x.(baz); return ok }
+
+type baz2 int
+
+func IsBaz2(x interface{}) bool {
+	switch x.(type) {
+	case baz2:
+		return true
+	default:
+		return false
+	}
+}

test/fixedbugs/issue5755.dir/main.go

+// Copyright 2013 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 "./a"
+
+func main() {
+	a.Test1("frumious")
+	a.Test2("frumious")
+	a.Test3("frumious")
+	a.Test4("frumious")
+
+	a.Test5(nil)
+	a.Test6(nil)
+	a.Test7(nil)
+	a.Test8(nil)
+	a.Test9(0)
+
+	a.TestBar()
+	a.IsBaz(nil)
+}

test/fixedbugs/issue5755.go

+// compiledir
+
+// Copyright 2013 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 5755: exported data for inlining may miss
+// named types when used in string conversions.
+
+package ignored