[llvm] AMDGPU: Document address spaces as reserved (PR #163996)

[Nicolai Hähnle via llvm-commits]

https://github.com/nhaehnle created https://github.com/llvm/llvm-project/pull/163996

They are going to be used for internal work downstream that we do expect to upstream eventually.

>From eb3b89f3b054ac75d3e7dc1d51872d11ea650a3e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicolai=20H=C3=A4hnle?= <nicolai.haehnle at amd.com>
Date: Fri, 17 Oct 2025 10:30:06 -0700
Subject: [PATCH] AMDGPU: Document address spaces as reserved

They are going to be used for internal work downstream that we do expect
to upstream eventually.
---
 llvm/docs/AMDGPUUsage.rst | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/llvm/docs/AMDGPUUsage.rst b/llvm/docs/AMDGPUUsage.rst
index 8193adcd97a19..e062032313058 100644
--- a/llvm/docs/AMDGPUUsage.rst
+++ b/llvm/docs/AMDGPUUsage.rst
@@ -883,6 +883,8 @@ supported for the ``amdgcn`` target.
      Buffer Fat Pointer                    7               N/A         N/A              160     0
      Buffer Resource                       8               N/A         V#               128     0x00000000000000000000000000000000
      Buffer Strided Pointer (experimental) 9               *TODO*
+     *reserved for downstream use*         10
+     *reserved for downstream use*         11
      Streamout Registers                   128             N/A         GS_REGS
      ===================================== =============== =========== ================ ======= ============================