1 files changed, 38 insertions, 0 deletions
diff --git a/test/fixedbugs/issue50854.go b/test/fixedbugs/issue50854.go
new file mode 100644
index 0000000..a5be919
--- /dev/null
+++ b/test/fixedbugs/issue50854.go
@@ -0,0 +1,38 @@
+// run
+
+// Copyright 2022 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
+
+// This checks for incorrect application of CMP(-x,y) -> CMN(x,y) in arm and arm64
+
+//go:noinline
+func f(p int64, x, y int64) bool { return -x <= p && p <= y }
+
+//go:noinline
+func g(p int32, x, y int32) bool { return -x <= p && p <= y }
+
+// There are some more complicated patterns involving compares and shifts, try to trigger those.
+
+//go:noinline
+func h(p int64, x, y int64) bool { return -(x<<1) <= p && p <= y }
+
+//go:noinline
+func k(p int32, x, y int32) bool { return -(1<<x) <= p && p <= y }
+
+//go:noinline
+func check(b bool) {
+	if b {
+		return
+	}
+	panic("FAILURE")
+}
+
+func main() {
+	check(f(1, -1<<63, 1<<63-1))
+	check(g(1, -1<<31, 1<<31-1))
+	check(h(1, -1<<62, 1<<63-1))
+	check(k(1, 31, 1<<31-1))
+}