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cmd/compile: fix export type conversion loss in inlined func body

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Fixes #12677.

Change-Id: I72012f55615fcf5f4a16c054706c9bcd82e49ccd
Reviewed-on: https://go-review.googlesource.com/17817
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Russ Cox 2015-12-14 14:07:21 -05:00
parent a40281112c
commit 91c8e5f80b
4 changed files with 25 additions and 1 deletions
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2
src/cmd/compile/internal/gc/fmt.go
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@ -1120,7 +1120,7 @@ func exprfmt(n *Node, prec int) string {
if n.Val().Ctype() == CTNIL && n.Orig != nil && n.Orig != n {
return exprfmt(n.Orig, prec)
}
if n.Type != nil && n.Type != Types[n.Type.Etype] && n.Type != idealbool && n.Type != idealstring {
if n.Type != nil && n.Type.Etype != TIDEAL && n.Type.Etype != TNIL && n.Type != idealbool && n.Type != idealstring {
// Need parens when type begins with what might
// be misinterpreted as a unary operator: * or <-.
if Isptr[n.Type.Etype] || (n.Type.Etype == TCHAN && n.Type.Chan == Crecv) {

8
test/fixedbugs/issue12677.dir/p.go Normal file
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@ -0,0 +1,8 @@
// Copyright 2015 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
func Baz(f int) float64 {
return 1 / float64(int(1)<<(uint(f)))
}

7
test/fixedbugs/issue12677.dir/q.go Normal file
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@ -0,0 +1,7 @@
// Copyright 2015 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 q
import "./p"
func f() { println(p.Baz(2)) }

9
test/fixedbugs/issue12677.go Normal file
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@ -0,0 +1,9 @@
// compiledir
// Copyright 2015 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 12677: Type loss during export/import of inlined function body.
package ignored