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-rw-r--r--test/fixedbugs/bug456.go26
1 files changed, 26 insertions, 0 deletions
diff --git a/test/fixedbugs/bug456.go b/test/fixedbugs/bug456.go
new file mode 100644
index 0000000..c77a76d
--- /dev/null
+++ b/test/fixedbugs/bug456.go
@@ -0,0 +1,26 @@
+// run
+
+// Copyright 2012 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 3907: out of fixed registers in nested byte multiply.
+// Used to happen with both 6g and 8g.
+
+package main
+
+func F(a, b, c, d uint8) uint8 {
+ return a * (b * (c * (d *
+ (a * (b * (c * (d *
+ (a * (b * (c * (d *
+ a * (b * (c * d)))))))))))))
+}
+
+func main() {
+ var a, b, c, d uint8 = 1, 1, 1, 1
+ x := F(a, b, c, d)
+ if x != 1 {
+ println(x)
+ panic("x != 1")
+ }
+}