1 files changed, 17 insertions, 0 deletions
diff --git a/test/fixedbugs/issue27143.go b/test/fixedbugs/issue27143.go
new file mode 100644
index 0000000..009ec9f
--- /dev/null
+++ b/test/fixedbugs/issue27143.go
@@ -0,0 +1,17 @@
+// compile
+
+// Copyright 2018 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 27143: cmd/compile: erroneous application of walkinrange
+// optimization for const over 2**63
+
+package p
+
+var c uint64
+
+var b1 bool = 0x7fffffffffffffff < c && c < 0x8000000000000000
+var b2 bool = c < 0x8000000000000000 && 0x7fffffffffffffff < c
+var b3 bool = 0x8000000000000000 < c && c < 0x8000000000000001
+var b4 bool = c < 0x8000000000000001 && 0x8000000000000000 < c