Initial commit: Go 1.23 release state

test/zerosize.go

@@ -0,0 +1,33 @@
+// run
+
+// Copyright 2023 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 zero-sized variables get same address as
+// runtime.zerobase.
+
+package main
+
+var x, y [0]int
+var p, q = new([0]int), new([0]int) // should get &runtime.zerobase
+
+func main() {
+	if &x != &y {
+		// Failing for now. x and y are at same address, but compiler optimizes &x==&y to false. Skip.
+		// print("&x=", &x, " &y=", &y, " &x==&y = ", &x==&y, "\n")
+		// panic("FAIL")
+	}
+	if p != q {
+		print("p=", p, " q=", q, " p==q = ", p==q, "\n")
+		panic("FAIL")
+	}
+	if &x != p {
+		print("&x=", &x, " p=", p, " &x==p = ", &x==p, "\n")
+		panic("FAIL")
+	}
+	if &y != p {
+		print("&y=", &y, " p=", p, " &y==p = ", &y==p, "\n")
+		panic("FAIL")
+	}
+}