[clang] [llvm] [clang][Driver] Add HIPAMD Driver support for AMDGCN flavoured SPIR-V (PR #95061)

[Matt Arsenault via cfe-commits]

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@@ -128,12 +128,13 @@ enum class CudaArch {
   GFX12_GENERIC,
   GFX1200,
   GFX1201,
+  AMDGCNSPIRV,
   Generic, // A processor model named 'generic' if the target backend defines a
            // public one.
   LAST,
 
   CudaDefault = CudaArch::SM_52,
-  HIPDefault = CudaArch::GFX906,
+  HIPDefault = CudaArch::AMDGCNSPIRV,
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arsenm wrote:

Behavior change should definitely be done separately 

https://github.com/llvm/llvm-project/pull/95061