code review 97500044: cmd/gc: correct handling of globals, func args, results

test/fixedbugs/issue1304.go

+// run
+
+// 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.
+
+package main
+
+var a = 1
+
+func main() {
+        defer func() {
+                recover()
+                if a != 2 {
+                        println("BUG a =", a)
+                }
+        }()
+        a = 2
+        b := a - a
+        c := 4
+        a = c / b
+        a = 3
+}