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-rw-r--r--test/fixedbugs/issue12133.go26
1 files changed, 26 insertions, 0 deletions
diff --git a/test/fixedbugs/issue12133.go b/test/fixedbugs/issue12133.go
new file mode 100644
index 0000000..bbf9fb0
--- /dev/null
+++ b/test/fixedbugs/issue12133.go
@@ -0,0 +1,26 @@
+// run
+
+// 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 12133. The CX register was getting clobbered
+// because we did not keep track of its allocation correctly.
+
+package main
+
+import "fmt"
+
+func main() {
+ want := uint(48)
+ got := f1(48)
+ if got != want {
+ fmt.Println("got", got, ", wanted", want)
+ panic("bad")
+ }
+}
+
+//go:noinline
+func f1(v1 uint) uint {
+ return v1 >> ((1 >> v1) + (1 >> v1))
+}