cmd/gc: fix liveness for address-taken variables in inlined functions
The 'address taken' bit in a function variable was not
propagating into the inlined copies, causing incorrect
liveness information.
LGTM=dsymonds, bradfitz
R=golang-codereviews, bradfitz
CC=dsymonds, golang-codereviews, iant, khr, r
https://golang.org/cl/96670046
diff --git a/test/live2.go b/test/live2.go
new file mode 100644
index 0000000..1e32794
--- /dev/null
+++ b/test/live2.go
@@ -0,0 +1,39 @@
+// errorcheck -0 -live
+
+// Copyright 2014 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.
+
+// liveness tests with inlining ENABLED
+// see also live.go.
+
+package main
+
+// issue 8142: lost 'addrtaken' bit on inlined variables.
+// no inlining in this test, so just checking that non-inlined works.
+
+type T40 struct {
+ m map[int]int
+}
+
+func newT40() *T40 {
+ ret := T40{ // ERROR "live at call to makemap: &ret"
+ make(map[int]int),
+ }
+ return &ret
+}
+
+func bad40() {
+ t := newT40() // ERROR "live at call to makemap: ret"
+ println() // ERROR "live at call to printnl: ret"
+ _ = t
+}
+
+func good40() {
+ ret := T40{ // ERROR "live at call to makemap: ret"
+ make(map[int]int),
+ }
+ t := &ret
+ println() // ERROR "live at call to printnl: ret"
+ _ = t
+}
