[clang] [Clang][AMDGPU] Add a builtin for llvm.amdgcn.make.buffer.rsrc intrinsic (PR #95276)

[Matt Arsenault via cfe-commits]

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@@ -19082,6 +19082,15 @@ Value *CodeGenFunction::EmitAMDGPUBuiltinExpr(unsigned BuiltinID,
         CGM.getIntrinsic(Intrinsic::amdgcn_s_sendmsg_rtn, {ResultType});
     return Builder.CreateCall(F, {Arg});
   }
+  case AMDGPU::BI__builtin_amdgcn_make_buffer_rsrc: {
+    llvm::Value *Base = EmitScalarExpr(E->getArg(0));
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arsenm wrote:

I guess you need this just for the pointer type mangling. Can you abuse the CreateUnary* functions for this case? 

https://github.com/llvm/llvm-project/pull/95276