Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 45 insertions, 0 deletions

diff --git a/test/fixedbugs/issue15585.go b/test/fixedbugs/issue15585.go
new file mode 100644
index 0000000..79eb13f
--- /dev/null
+++ b/test/fixedbugs/issue15585.go
@@ -0,0 +1,45 @@
+// compile
+
+// Copyright 2016 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 bug
+
+func example(n int) (rc int) {
+	var cc, ll, pp, rr [27]int
+	for q0 := 0; q0 < n-2; q0++ {
+		for q1 := q0 + 2; q1 < n; q1++ {
+			var c, d, l, p, r int
+			b0 := 1 << uint(q0)
+			b1 := 1 << uint(q1)
+			l = ((b0 << 1) | b1) << 1
+			c = b0 | b1 | (-1 << uint(n))
+			r = ((b0 >> 1) | b1) >> 1
+		E:
+			if c != -1 {
+				p = ^(l | c | r)
+			} else {
+				rc++
+				goto R
+			}
+		L:
+			if p != 0 {
+				lsb := p & -p
+				p &^= lsb
+				ll[d], cc[d], rr[d], pp[d] = l, c, r, p
+				l, c, r = (l|lsb)<<1, c|lsb, (r|lsb)>>1
+				d++
+				goto E
+			}
+		R:
+			d--
+			if d >= 0 {
+				l, c, r, p = ll[d], cc[d], rr[d], pp[d]
+				goto L
+			}
+		}
+	}
+	rc <<= 1
+	return
+}