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-rw-r--r--test/fixedbugs/issue33555.go81
1 files changed, 81 insertions, 0 deletions
diff --git a/test/fixedbugs/issue33555.go b/test/fixedbugs/issue33555.go
new file mode 100644
index 0000000..c1fcd2a
--- /dev/null
+++ b/test/fixedbugs/issue33555.go
@@ -0,0 +1,81 @@
+// +build !nacl,!js,!gccgo
+// run
+
+// Copyright 2019 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.
+
+// Test that the linker permits long call sequences.
+package main
+
+import (
+ "bytes"
+ "fmt"
+ "io/ioutil"
+ "os"
+ "os/exec"
+ "path/filepath"
+ "strconv"
+)
+
+const start = `
+package main
+
+func main() {
+ println(f0() + 1)
+}
+`
+
+const fn = `
+//go:noinline
+func f%d() int {
+ return f%d() + 1
+}`
+
+const fnlast = `
+//go:noinline
+func f%d() int {
+ return 0
+}
+`
+
+const count = 400
+
+func main() {
+ if err := test(); err != nil {
+ fmt.Fprintln(os.Stderr, err)
+ os.Exit(1)
+ }
+}
+
+func test() error {
+ var buf bytes.Buffer
+ buf.WriteString(start)
+ for i := 0; i < count; i++ {
+ fmt.Fprintf(&buf, fn, i, i + 1)
+ }
+ fmt.Fprintf(&buf, fnlast, count)
+
+ dir, err := ioutil.TempDir("", "issue33555")
+ if err != nil {
+ return err
+ }
+ defer os.RemoveAll(dir)
+
+ fn := filepath.Join(dir, "x.go")
+ if err := ioutil.WriteFile(fn, buf.Bytes(), 0644); err != nil {
+ return err
+ }
+
+ out, err := exec.Command("go", "run", fn).CombinedOutput()
+ if err != nil {
+ return err
+ }
+
+ want := strconv.Itoa(count + 1)
+ if got := string(bytes.TrimSpace(out)); got != want {
+ return fmt.Errorf("got %q want %q", got, want)
+ }
+
+ return nil
+}