[clang] [llvm] [AMDGPU][clang][CodeGen][opt] Add late-resolved feature identifying predicates (PR #134016)

[Erich Keane via llvm-commits]

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@@ -13338,4 +13338,23 @@ def err_acc_device_type_multiple_archs
 // AMDGCN builtins diagnostics
 def err_amdgcn_load_lds_size_invalid_value : Error<"invalid size value">;
 def note_amdgcn_load_lds_size_valid_value : Note<"size must be %select{1, 2, or 4|1, 2, 4, 12 or 16}0">;
+def err_amdgcn_processor_is_arg_not_literal
+    : Error<"the argument to __builtin_amdgcn_processor_is must be a string "
+            "literal">;
+def err_amdgcn_processor_is_arg_invalid_value
+    : Error<"the argument to __builtin_amdgcn_processor_is must be a valid "
+            "AMDGCN processor identifier; '%0' is not valid">;
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erichkeane wrote:

Is there value/etc to printing the list like we do with -`march`?

https://github.com/llvm/llvm-project/pull/134016