1 files changed, 40 insertions, 0 deletions
diff --git a/test/fixedbugs/issue7944.go b/test/fixedbugs/issue7944.go
new file mode 100644
index 0000000..960065b
--- /dev/null
+++ b/test/fixedbugs/issue7944.go
@@ -0,0 +1,40 @@
+// 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.
+
+// Issue 7944:
+// Liveness bitmaps said b was live at call to g,
+// but no one told the register optimizer.
+
+package main
+
+import "runtime"
+
+func f(b []byte) {
+	for len(b) > 0 {
+		n := len(b)
+		n = f1(n)
+		f2(b[n:])
+		b = b[n:]
+	}
+	g()
+}
+
+func f1(n int) int {
+	runtime.GC()
+	return n
+}
+
+func f2(b []byte) {
+	runtime.GC()
+}
+
+func g() {
+	runtime.GC()
+}
+
+func main() {
+	f(make([]byte, 100))
+}