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-rw-r--r--test/fixedbugs/issue23522.go46
1 files changed, 46 insertions, 0 deletions
diff --git a/test/fixedbugs/issue23522.go b/test/fixedbugs/issue23522.go
new file mode 100644
index 0000000..cace86c
--- /dev/null
+++ b/test/fixedbugs/issue23522.go
@@ -0,0 +1,46 @@
+// run
+
+// 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.
+
+package main
+
+import (
+ "math"
+)
+
+type S struct {
+ u int64
+ n int32
+}
+
+func F1(f float64) *S {
+ s := f
+ pf := math.Copysign(f, 1)
+ u := math.Floor(pf)
+ return &S{
+ u: int64(math.Copysign(u, s)),
+ n: int32(math.Copysign((pf-u)*1e9, s)),
+ }
+}
+
+func F2(f float64) *S {
+ s := f
+ f = math.Copysign(f, 1)
+ u := math.Floor(f)
+ return &S{
+ u: int64(math.Copysign(u, s)),
+ n: int32(math.Copysign((f-u)*1e9, s)),
+ }
+}
+
+func main() {
+ s1 := F1(-1)
+ s2 := F2(-1)
+ if *s1 != *s2 {
+ println("F1:", s1.u, s1.n)
+ println("F2:", s2.u, s2.n)
+ panic("different")
+ }
+}