================
@@ -4920,6 +4920,116 @@ If no address spaces names are provided, all address
spaces are fenced.
__builtin_amdgcn_fence(__ATOMIC_SEQ_CST, "workgroup", "local")
__builtin_amdgcn_fence(__ATOMIC_SEQ_CST, "workgroup", "local", "global")
+__builtin_amdgcn_processor_is and __builtin_amdgcn_is_invocable
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+``__builtin_amdgcn_processor_is`` and ``__builtin_amdgcn_is_invocable`` provide
+a functional mechanism for programatically querying:
+
+* the identity of the current target processor;
+* the capability of the current target processor to invoke a particular
builtin.
+
+**Syntax**:
+
+.. code-block:: c
+
+ // When used as the predicate for a control structure
+ bool __builtin_amdgcn_processor_is(const char*);
+ bool __builtin_amdgcn_is_invocable(builtin_name);
+ // Otherwise
----------------
erichkeane wrote:
Re-answering my own question: Later on you seem to be using 'predicate for a
control structure' to mean 'the condition of a if/while/for. However, why is
it problematic to have someone check this and store it in a variable? Why is:
`if (__builtin_amd_gcn_processor_is("gfx1201"))` fine, but:
`bool b = __builtin_amd_gcn_processor_is("gfx1201"); if (b)` a problem?
https://github.com/llvm/llvm-project/pull/134016
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