[clang] [llvm] [AMDGPU] Add a new builtin type for image descriptor rsrc (PR #160258)

[Shilei Tian via cfe-commits]

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@@ -20,10 +20,17 @@
   AMDGPU_TYPE(Name, Id, SingletonId, Width, Align)
 #endif
 
+#ifndef AMDGPU_IMAGE_RSRC_TYPE
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shiltian wrote:

Why do we need a special macro for this?

https://github.com/llvm/llvm-project/pull/160258