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19fd96512c
Put zero-sized data symbols at same address as runtime.zerobase, so zero-sized global variables have the same address as zero-sized allocations. Change-Id: Ib3145dc1b663a9794dfabc0e6abd2384960f2c49 Reviewed-on: https://go-review.googlesource.com/c/go/+/490435 Run-TryBot: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Russ Cox <rsc@golang.org>
34 lines
814 B
Go
34 lines
814 B
Go
// run
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// Copyright 2023 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test that zero-sized variables get same address as
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// runtime.zerobase.
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package main
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var x, y [0]int
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var p, q = new([0]int), new([0]int) // should get &runtime.zerobase
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func main() {
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if &x != &y {
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// Failing for now. x and y are at same address, but compiler optimizes &x==&y to false. Skip.
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// print("&x=", &x, " &y=", &y, " &x==&y = ", &x==&y, "\n")
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// panic("FAIL")
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}
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if p != q {
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print("p=", p, " q=", q, " p==q = ", p==q, "\n")
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panic("FAIL")
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}
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if &x != p {
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print("&x=", &x, " p=", p, " &x==p = ", &x==p, "\n")
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panic("FAIL")
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}
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if &y != p {
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print("&y=", &y, " p=", p, " &y==p = ", &y==p, "\n")
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panic("FAIL")
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}
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}
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