1 files changed, 51 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/ssa/testdata/i22558.go b/src/cmd/compile/internal/ssa/testdata/i22558.go
new file mode 100644
index 0000000..8aea76c
--- /dev/null
+++ b/src/cmd/compile/internal/ssa/testdata/i22558.go
@@ -0,0 +1,51 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+type big struct {
+	pile [768]int8
+}
+
+type thing struct {
+	name  string
+	next  *thing
+	self  *thing
+	stuff []big
+}
+
+func test(t *thing, u *thing) {
+	if t.next != nil {
+		return
+	}
+	fmt.Fprintf(os.Stderr, "%s\n", t.name)
+	u.self = u
+	t.self = t
+	t.next = u
+	for _, p := range t.stuff {
+		if isFoo(t, p) {
+			return
+		}
+	}
+}
+
+//go:noinline
+func isFoo(t *thing, b big) bool {
+	return true
+}
+
+func main() {
+	growstack() // Use stack early to prevent growth during test, which confuses gdb
+	t := &thing{name: "t", self: nil, next: nil, stuff: make([]big, 1)}
+	u := thing{name: "u", self: t, next: t, stuff: make([]big, 1)}
+	test(t, &u)
+}
+
+var snk string
+
+//go:noinline
+func growstack() {
+	snk = fmt.Sprintf("%#v,%#v,%#v", 1, true, "cat")
+}